JP2001298436A - Wireless communication system, wireless base station device, wireless mobile station device, and wireless communication method - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To enable frequency expansion by using a frequency division multiplexing method, and to enable dynamic frequency channel allocation according to the environment surrounding a communication base station and a communication terminal, thereby enabling effective frequency use. Use and speed up communication. SOLUTION: Each frequency channel is constituted by a multicarrier according to the OFDM method, and the OF of each frequency channel is
The DM subcarriers are arranged so as to be orthogonal to each other so that a plurality of channels can be regarded as one OFDM signal, and the base station can dynamically allocate a plurality of frequency channels to a communication terminal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication system, a base station apparatus, a communication terminal apparatus, and a communication method which are suitably applied to, for example, data communication in a mobile body, particularly, wireless transmission of a multicarrier signal.

[0002]

2. Description of the Related Art Conventionally, there are a time division multiplexing method and a frequency division multiplexing method as a method of providing a plurality of channels in order to spread mobile communication services in two dimensions. In the time division multiplex system, it is necessary to synchronize between base stations, and the system configuration becomes complicated. On the other hand, in the case of the frequency division multiplexing system, each base station can independently control communication between the base station and the communication terminal, and the system configuration is simplified.

FIG. 23 shows a base station 12 conventionally proposed.
0 is shown. Here, an example in which communication is performed on the Internet network 12 is described.
0 is the line control unit 1 connected to the Internet network 12
At 21, line control such as call connection with a network is performed. The received data from the network side decomposed by the line control unit 121 is sent to the channel coding / decoding unit 123,
The data is converted to a wireless transmission format, and the converted data is subjected to modulation processing by QPSK modulation or the like by the modulation section 124. Then, transmission processing such as frequency conversion or amplification is performed by the transmission section 125, and the transmission processing is performed from the antenna 126 to the communication terminal. Is transmitted wirelessly.

The signal transmitted from the communication terminal side is
After receiving processing such as frequency conversion is performed by the receiving section 127 connected to the antenna 126, demodulation of received data is performed by the demodulating section 128, and the demodulated received data is supplied to the channel coding / decoding section 123. Then, a decoding process is performed. Then, the data assembled by the line control unit 121 is transmitted to the network side.

[0005] These processes in the base station 120 are as follows.
It is executed under control from a central control unit (CPU) 122 via a bus line BL. When the base station 120 is installed, it receives a fixed channel assignment.

FIG. 24 shows a configuration of the communication terminal 130.
In the communication terminal 130, after receiving processing such as frequency conversion is performed by a receiving unit 132 connected to the antenna 131, received data is demodulated by a demodulating unit 133, and the demodulated received data is subjected to channel coding / decoding. Coding part 1
, And performs a conversion process from the wireless transmission format. The converted data is transmitted to the communication terminal 130.
Is supplied to a central control unit (CPU) 135, processed for display, and then supplied to a display unit 136.

Transmission data generated based on the operation of an operation unit 137 connected to a central control unit (CPU) 135 is supplied to a channel coding / decoding unit 134 and converted into a radio transmission format. The converted data is modulated by
After being subjected to modulation processing by K modulation or the like, transmission processing such as frequency conversion and amplification is performed by the transmission unit 139, and the antenna 131
From the base station to the base station.

The channel setting information set at this time is extracted from a control signal broadcast from the base station 120.

The base station 120 as such a system
By preparing the communication terminal 130 and connecting to the Internet 12 or the like, the communication terminal 130 can receive Internet broadcasts and the like from various content servers.

Here, the conventional base station 120 and the communication terminal 1
A description will be given of a signal wirelessly transmitted to and from
In this system, a single carrier signal transmission method is applied to wireless transmission. That is, the transmission data is modulated and transmitted as a wireless transmission signal to one carrier that falls within a predetermined channel bandwidth.

FIG. 25 is a diagram showing an example of channel assignment, in which both uplink and downlink are constituted by a single carrier. The number of channels is eight, and each carrier is modulated by a method such as QPSK modulation. In each base station 120, CH1 to CH
The communication with the communication terminal 130 is performed using any one of the unique channels up to 8.

[0012]

In the case where radio transmission is performed by a single carrier system using a frequency division multiplex system as in the above-described conventional system, a base station adjacent to a certain base station is used. The number of channels that can be used even when there is no base station (cell) is one, and the number of channels that can be used when there is a channel that is not performing communication even if an adjacent base station (cell) exists is the first channel. It is limited to the determined channel. When performing communication using a plurality of channels, it is necessary to have a plurality of transmission / reception blocks, which is not practical.

In view of the above, the present invention makes it possible to perform a dynamic development of a frequency channel in accordance with the environment surrounding a base station for communication and a communication terminal, after making the area development possible by the frequency division multiplexing method. An object of the present invention is to make effective use of a frequency and to speed up communication.

[0014]

According to the present invention, each frequency channel is composed of a multicarrier according to the OFDM system, the OFDM subcarriers of each frequency channel are arranged so as to be orthogonal to each other, and a plurality of channels are formed into one OFDM.
The above-described problem is solved by allowing the signal to be regarded as a DM signal and allowing the base station to dynamically assign a plurality of frequency channels to the communication terminal.

That is, according to the present invention, one frequency channel is composed of a multicarrier composed of j subcarriers according to the OFDM system, and i frequency channels (C
H1_CHi), a radio communication system including a base station that allocates the frequency channel for each radio zone and a plurality of mobile stations, wherein the communication from the mobile station uses the frequency channel CHx allocated to the radio zone. A channel allocation control means for allocating k frequency channels other than the frequency channel CHx to the mobile station according to a request; and k + 1 including the frequency channel CHx.
Number (k ≦ i−1) of frequency channels as one set of OFDM
As a multi-carrier frequency channel,
Using a radio base station apparatus including a transmitting / receiving means for transmitting and receiving data to and from the mobile station, and using the allocated frequency channel CHx of the radio zone, making a communication request to the base station, and excluding the frequency channel CHx channel control means for receiving allocation of k frequency channels from the base station, and k + 1 including the frequency channel CHx
Number (k ≦ i−1) of frequency channels as one set of OFDM
As a multi-carrier frequency channel,
And a radio mobile station device including a transmission / reception means for transmitting / receiving data to / from the base station.

Further, according to the present invention, one frequency channel is composed of a multicarrier composed of j subcarriers according to the OFDM system, and i frequency channels (CH1_C
Hi), a wireless base station device in a wireless communication system composed of a base station and a plurality of mobile stations that allocates the frequency channel for each wireless zone, wherein the allocated frequency channel of the wireless zone is used. In response to a communication request from a mobile station, the frequency channel CHx
Channel allocation control means for allocating k frequency channels other than the above to the mobile station, and k + 1 (k ≦ i−1) frequency channels including the frequency channel CHx as a set of OFDM multicarrier frequency channels. Transmitting and receiving means for transmitting and receiving data to and from the mobile station.

Further, according to the present invention, one frequency channel is composed of a multicarrier composed of j subcarriers according to the OFDM system, and i frequency channels (CH1_C
Hi), a radio mobile station device in a radio communication system comprising a base station and a plurality of mobile stations that allocates the frequency channel for each radio zone, using the allocated frequency channel CHx of the radio zone, A channel control means for making a communication request to the base station and receiving allocation of k frequency channels other than the frequency channel CHx from the base station;
A transmission / reception unit for transmitting / receiving data to / from a base station, using k + 1 (k ≦ i−1) frequency channels including Hx as a set of OFDM multicarrier frequency channels. .

Further, according to the present invention, one frequency channel is composed of a multicarrier composed of j subcarriers according to the OFDM scheme, and i frequency channels (CH1_C
Hi), a wireless communication method in a wireless communication system comprising a base station and a plurality of mobile stations that allocate the frequency channel for each wireless zone, the mobile station,
Using the allocated frequency channel CHx of the radio zone, a communication request is made to the base station, and the base station allocates k frequency channels other than the frequency channel CHx to the mobile station, and thereafter, The mobile station transmits and receives data by using k + 1 (k ≦ i−1) frequency channels including the frequency channel CHx as a set of frequency channels using OFDM multicarrier.

Further, according to the present invention, one frequency channel is composed of a multicarrier composed of j subcarriers according to the OFDM scheme, and i frequency channels (CH1_C
Hi), a wireless communication system comprising a base station and a plurality of mobile stations that allocate the frequency channel for each wireless zone, wherein the communication from the mobile station using the allocated frequency channel CHx of the wireless zone Channel allocation control means for allocating k frequency channels other than the frequency channel CHx to one of the downlink or uplink of the mobile station in response to a request, and including the frequency channel CHx in one of the downlink or uplink. k
+1 (k ≦ i−1) frequency channels are set as one set of OFs
Using a frequency channel based on a DM multi-carrier, a radio base station apparatus including transmitting / receiving means for transmitting / receiving data to / from the mobile station, and using the allocated frequency channel CHx of the radio zone to the base station. A channel control means for making a communication request and receiving allocation of k frequency channels other than the frequency channel CHx from the base station to one of the downlink or uplink, and the frequency channel CHx to one of the downlink or uplink.
K + 1 (k ≦ i−1) frequency channels including
A radio mobile station apparatus comprising: a transmission / reception unit for transmitting / receiving data to / from the base station by using a set of frequency channels based on OFDM multicarriers.

Further, according to the present invention, one frequency channel is constituted by a multicarrier composed of j subcarriers according to the OFDM method, and i frequency channels (CH1_C
Hi), a radio base station device in a radio communication system comprising a base station and a plurality of mobile stations that allocates the frequency channel for each radio zone, from the mobile station, the allocated frequency channel of the radio zone In response to a communication request using CHx, the frequency channel CHx
Channel allocation control means for allocating k frequency channels other than the above to the downlink or uplink of the mobile station, and k + 1 (k ≦ i−1) including the frequency channel CHx in one of the downlink or uplink And a transmission / reception means for transmitting / receiving data to / from the mobile station using a set of frequency channels based on OFDM multicarrier.

Further, according to the present invention, one frequency channel is constituted by a multicarrier composed of j subcarriers according to the OFDM method, and i frequency channels (CH1_C
Hi), a radio mobile station device in a radio communication system comprising a base station and a plurality of mobile stations that allocates the frequency channel for each radio zone, using the allocated frequency channel CHx of the radio zone, Make a communication request to the base station, from the base station, channel control means to receive the allocation of k frequency channels other than the frequency channel CHx to one of the downlink or uplink, and to one of the downlink or uplink Transmitting / receiving means for transmitting / receiving data to / from the base station using k + 1 (k ≦ i−1) frequency channels including the frequency channel CHx as a set of OFDM multi-carrier frequency channels; It is characterized by having.

Further, according to the present invention, one frequency channel is composed of a multicarrier composed of j subcarriers according to the OFDM system, and i frequency channels (CH1_C
Hi), a wireless communication method in a wireless communication system comprising a base station and a plurality of mobile stations that allocate the frequency channel for each wireless zone, the mobile station,
Using the allocated frequency channel CHx of the wireless zone, a communication request is issued to the base station, and the base station allocates k frequency channels other than the frequency channel CHx to the mobile station, and then transmits the base station or The mobile station, the mobile station or the base station may use the mobile station or the base station as k + 1 (k ≦ i−1) frequency channels including the frequency channel CHx as a set of OFDM multicarrier frequency channels. The base station transmits data to the base station or the mobile station using the frequency channel CHx.

Further, according to the present invention, one frequency channel is constituted by a multicarrier composed of j subcarriers according to the OFDM system, and i frequency channels (CH1_C
Hi), a wireless communication system comprising a base station and a plurality of mobile stations that allocate the frequency channel for each wireless zone, wherein the communication from the mobile station using the allocated frequency channel CHx of the wireless zone In response to a request, k available frequency channels other than the frequency channel CHx are determined, and channel allocation control means for allocating the determined k frequency channels to the mobile station, and k + 1 channels including the frequency channel CHx A radio base station apparatus having transmission / reception means for transmitting / receiving data to / from the mobile station, wherein a frequency channel of (k ≦ i−1) is set as a frequency channel of a set of OFDM multicarriers; A communication request is made to the base station using the assigned frequency channel CHx, and the frequency channel And Chanenru control means for receiving an allocation of k frequency Chanenru except Nru CHx from the base station, k + 1 containing the frequency Chanenru CHx
Number (k ≦ i−1) of frequency channels as one set of OFDM
As a multi-carrier frequency channel,
A wireless mobile station device comprising: a transmitting / receiving means for transmitting / receiving data to / from a base station.

Further, according to the present invention, one frequency channel is composed of a multicarrier composed of j subcarriers according to the OFDM scheme, and i frequency channels (CH1_C
Hi), a wireless base station device in a wireless communication system composed of a base station and a plurality of mobile stations that allocates the frequency channel for each wireless zone, wherein the allocated frequency channel of the wireless zone is used. In response to a communication request from a mobile station, the frequency channel CHx
Channel allocation control means for deciding k frequency channels usable other than the above, and allocating the determined k frequency channels to the mobile station, and k + 1 (k ≦ i−1) frequencies including the frequency channel CHx A transmission / reception unit that transmits / receives data to / from the mobile station is provided, wherein the transmission / reception unit uses the transmission channel as a set of frequency channels using OFDM multicarrier.

Further, according to the present invention, one frequency channel is constituted by a multicarrier composed of j subcarriers according to the OFDM system, and i frequency channels (CH1_C
Hi), a wireless communication method in a wireless communication system comprising a base station and a plurality of mobile stations that allocate the frequency channel for each wireless zone, the mobile station,
Using the allocated frequency channel CHx of the radio zone, a communication request is made to the base station. The base station determines k available frequency channels other than the frequency channel CHx, and determines the determined k frequencies. Then, the base station and the mobile station assign k + 1 (k ≦ i−1) frequency channels including the frequency channel CHx as a set of OFDM multicarrier frequency channels. , Transmitting and receiving data.

Further, according to the present invention, one frequency channel is composed of a multicarrier composed of j subcarriers according to the OFDM system, and i frequency channels (CH1_C
Hi), a wireless communication system comprising a base station and a plurality of mobile stations that allocate the frequency channel for each wireless zone, wherein the communication from the mobile station using the allocated frequency channel CHx of the wireless zone In response to the request, determine the available k frequency channels other than the frequency channel CHx, and a channel allocation control unit that allocates the determined k frequency channels to one of the downlink or uplink of the mobile station, K including the above-mentioned frequency channel CHx in one of the downlink and the uplink
+1 (k ≦ i−1) frequency channels are set as one set of OFs
A radio base station apparatus including transmitting / receiving means for transmitting / receiving data to / from the mobile station using a frequency channel based on a DM multi-carrier, and the base station using the frequency channel CHx assigned to the radio zone. A channel control means for receiving an allocation of k frequency channels other than the frequency channel CHx from the base station to one of the downlink and the uplink, and the frequency channel CH to one of the downlink or the uplink.
wireless transmission / reception means for transmitting / receiving data to / from the mobile station using k + 1 (k ≦ i−1) frequency channels including x and a set of OFDM-based multicarrier frequency channels. And a station device.

Further, according to the present invention, one frequency channel is composed of a multicarrier composed of j subcarriers according to the OFDM scheme, and i frequency channels (CH1_C
Hi), a wireless base station device in a wireless communication system composed of a base station and a plurality of mobile stations that allocates the frequency channel for each wireless zone, wherein the allocated frequency channel of the wireless zone is used. In response to a communication request from a mobile station, the frequency channel CHx
Determine the available k frequency channels other than the above, channel allocation control means for allocating the determined k frequency channels to one of the downlink or uplink of the mobile station, the above-mentioned to one of the downlink or uplink Transmitting / receiving means for transmitting / receiving data to / from the mobile station by using a set of frequency channels based on a multicarrier of the OFDM system, wherein k + 1 (k ≦ i−1) frequency channels including the frequency channel CHx are used. It is characterized by the following.

Further, according to the present invention, one frequency channel is composed of a multicarrier composed of j subcarriers according to the OFDM scheme, and i frequency channels (CH1_C
Hi), a wireless communication method in a wireless communication system comprising a base station and a plurality of mobile stations that allocate the frequency channel for each wireless zone, the mobile station,
Using the allocated frequency channel CHx of the radio zone, a communication request is made to the base station. The base station determines k available frequency channels other than the frequency channel CHx, and determines the determined k frequencies. Then, the base station and the mobile station assign k + 1 (k ≦ i−1) frequency channels including the frequency channel CHx as a set of OFDM multicarrier frequency channels. , Transmitting and receiving data.

Further, according to the present invention, one frequency channel is composed of a multicarrier composed of j subcarriers according to the OFDM method, and i frequency channels (CH1_C
Hi), a radio communication system comprising a base station that allocates the frequency channel for each radio zone and a plurality of mobile stations, wherein a simultaneous transmission from the mobile station using the frequency channel CHx allocated to the radio zone is performed. In response to a communication request including information on the number of communicable channels y (y ≧ 1), available y−
channel allocation control means for determining k frequency channels satisfying k ≧ 1, allocating the determined k frequency channels to the mobile station, and the frequency channel CH
a radio base station apparatus comprising: transmitting and receiving means for transmitting and receiving data to and from the mobile station, using k + 1 (k ≦ i−1) frequency channels including x as a set of OFDM multicarrier frequency channels. And a communication request including information on the number of channels y (y ≧ 1) that can be simultaneously communicated to the base station using the allocated frequency channel CHx of the wireless zone, and k frequency channels other than the frequency channel CHx are transmitted. Channel control means for receiving assignment of the frequency channel from the base station;
A radio mobile station apparatus comprising: transmitting and receiving means for transmitting and receiving data to and from the base station, by using k + 1 (k ≦ i−1) frequency channels including Hx as a set of frequency channels using OFDM multicarriers. And characterized in that:

Further, according to the present invention, one frequency channel is composed of a multicarrier composed of j subcarriers according to the OFDM method, and i frequency channels (CH1_C
Hi), a wireless base station device in a wireless communication system composed of a base station and a plurality of mobile stations that allocates the frequency channel for each wireless zone, wherein the allocated frequency channel of the wireless zone is used. In response to a communication request including information on the number y (y ≧ 1) of simultaneously communicable channels from the mobile station, the frequency channel CHx
Other than k available frequency channels satisfying y−k ≧ 1 and assigning the determined k frequency channels to the mobile station, k + 1 frequency channels including the frequency channel CHx (k ≤ i-1)
And a transmitting / receiving means for transmitting / receiving data to / from the mobile station as a set of OFDM multi-carrier frequency channels.

Further, according to the present invention, one frequency channel is composed of a multicarrier composed of j subcarriers according to the OFDM method, and i frequency channels (CH1_C
Hi), a radio mobile station device in a radio communication system composed of a base station and a plurality of mobile stations that allocates the frequency channel for each radio zone, using the allocated frequency channel CHx of the radio zone, A channel control means for making a communication request including information on the number y (y ≧ 1) of channels that can be simultaneously communicated to the base station and receiving allocation of k frequency channels other than the frequency channel CHx from the base station; Frequency channel
transmitting / receiving means for transmitting / receiving data to / from the base station by using k + 1 (k ≦ i−1) frequency channels including x as a set of OFDM multicarrier frequency channels. I do.

Further, according to the present invention, one frequency channel is composed of a multicarrier composed of j subcarriers according to the OFDM system, and i frequency channels (CH1_C
Hi), a wireless communication method in a wireless communication system comprising a base station and a plurality of mobile stations that allocate the frequency channel for each wireless zone, the mobile station,
Using the assigned frequency channel CHx of the radio zone, the number of channels y (y ≧ y) that can be simultaneously communicated with the base station.
The base station makes a communication request including the information of 1), and the base station
k frequency channels other than the frequency channel CHx satisfying k ≧ 1 are assigned to the mobile station, and then the base station and the mobile station perform the frequency channel CHx
K + 1 (k ≦ i−1) frequency channels including
Data transmission and reception are performed as a frequency channel using a set of OFDM multicarriers.

Further, according to the present invention, one frequency channel is composed of a multicarrier composed of j subcarriers according to the OFDM system, and i frequency channels (CH1_C
Hi), a radio communication system comprising a base station that allocates the frequency channel for each radio zone and a plurality of mobile stations, wherein a simultaneous transmission from the mobile station using the frequency channel CHx allocated to the radio zone is performed. In response to a communication request including information on the number of communicable channels y (y ≧ 1), available y−
Channel allocation control means for determining k frequency channels satisfying k ≧ 1 and allocating the determined k frequency channels to one of the downlink and the uplink of the mobile station; A transmission / reception unit for transmitting / receiving data to / from the mobile station by using k + 1 (k ≦ i−1) frequency channels including the frequency channel CHx as a set of OFDM multicarrier frequency channels; Using the radio base station apparatus and the allocated frequency channel CHx of the radio zone, the number y of channels that can be simultaneously communicated with the base station.
(Y ≧ 1), a communication request including information of (y ≧ 1) is transmitted to one of the downlink and the uplink.
Channel control means for receiving allocation of frequency channels from the base station, and k + 1 (k ≦ i−) channels including the frequency channel CHx in one of a downlink and an uplink.
A radio mobile station apparatus comprising: a transmission / reception unit that transmits / receives data to / from the base station using the frequency channel of 1) using a set of frequency channels based on OFDM multicarrier. .

Further, according to the present invention, one frequency channel is composed of a multicarrier composed of j subcarriers according to the OFDM scheme, and i frequency channels (CH1_C
Hi), a wireless base station device in a wireless communication system composed of a base station and a plurality of mobile stations that allocates the frequency channel for each wireless zone, wherein the allocated frequency channel of the wireless zone is used. In response to a communication request including information on the number y (y ≧ 1) of simultaneously communicable channels from the mobile station, the frequency channel CHx
Channel allocation control means for determining k frequency channels satisfying y−k ≧ 1 and allocating the determined k frequency channels to one of the downlink and the uplink of the mobile station; and downlink. Alternatively, k + 1 (k ≦ i) including the frequency channel CHx in one of the uplinks
-1) transmission / reception means for transmitting / receiving data to / from the mobile station by using a set of OFDM multi-carrier frequency channels.

Further, according to the present invention, one frequency channel is constituted by a multicarrier composed of j subcarriers according to the OFDM method, and i frequency channels (CH1_C
Hi), a radio mobile station device in a radio communication system composed of a base station and a plurality of mobile stations that allocates the frequency channel for each radio zone, using the allocated frequency channel CHx of the radio zone, The base station issues a communication request including information on the number of channels y (y ≧ 1) that can be simultaneously communicated to the base station, and allocates k frequency channels other than the frequency channel CHx to one of the downlink and the uplink. And a channel control means received from the above, and k + 1 (k ≦ i−1) frequency channels including the frequency channel CHx on one of the downlink and the uplink are used as a set of OFDM multicarrier frequency channels. Transmitting / receiving means for transmitting / receiving data to / from the base station.

Further, according to the present invention, one frequency channel is composed of a multicarrier composed of j subcarriers according to the OFDM scheme, and i frequency channels (CH1_C
Hi), a wireless communication method in a wireless communication system comprising a base station and a plurality of mobile stations that allocate the frequency channel for each wireless zone, the mobile station,
Using the assigned frequency channel CHx of the radio zone, the number of channels y (y ≧ y) that can be simultaneously communicated with the base station.
The base station makes a communication request including the information of 1), and the base station
k frequency channels other than the frequency channel CHx satisfying k ≧ 1 are assigned to the mobile station, and then the base station and the mobile station perform the frequency channel CHx
K + 1 (k ≦ i−1) frequency channels including
Data transmission and reception are performed as a frequency channel using a set of OFDM multicarriers.

[0037]

Embodiments of the present invention will be described below with reference to the drawings.

The present invention is applied to, for example, a data communication system having a configuration as shown in FIG.

The data communication system shown in FIG.
IP (Internet Protoco
1) It provides a service called connection, and includes various content servers 11 and a base station 20 connected to the Internet network 12.

The base station 20 performs wireless communication with the communication terminal 30 by a transmission method such as the QPSK modulation method, and connects to the Internet network 12 connected to the base station 20 and the communication terminal 30.
Relays communication with the

First, a description will be given of a system configuration using a multi-carrier system which is a basic form of the present invention.

In a basic system configuration, various data such as the Internet is received by a communication terminal 30 such as a portable information terminal via a base station 20, and data can be transmitted from the portable information terminal. is there.

Here, the base station 20 and the communication terminal 30 of the present embodiment
Basically, signals transmitted wirelessly to and from OFDM (ODM)
rthogonal Frequency Division Multiplex).

First, the processing in the base station 20 of the present embodiment will be described.

The overall configuration of the base station 20 is the same as that of the conventional base station 120 shown in FIG. 23, but in this example, the configuration for transmission / reception processing is different from that of the conventional single carrier system, and is different from the conventional single carrier system. It is a carrier system.

FIG. 2 is a diagram showing the configuration of the receiving unit and the transmitting unit of the base station 30 of the present embodiment. Antenna 1 for both transmission and reception
01 is connected to a low-noise amplifier 103 via an antenna switch 102.
3 is supplied to the reception mixer 104, the oscillation output fl1 based on the channel setting information of the first local oscillator 105 is mixed with the reception signal, and the reception signal of the predetermined frequency band fn is interposed. Convert to frequency signal.

The intermediate frequency signal output from the reception mixer 104 is supplied to the quadrature detector 106, and the second local oscillator 1
07 is mixed and subjected to quadrature detection, separated into an I component and a Q component, and the detected I component and Q component are supplied to an analog / digital converter 108, and the digital value of each component is output. Obtain data ID and QD. The data ID and QD are supplied to the digital filter 109, and pass only the frequency components corresponding to the corresponding channel. The signal output from the digital filter 109 is converted into a fast Fourier transform circuit (FFT circuit) 110
To perform j-point discrete Fourier transform processing to obtain j-symbol parallel data.

J output from the fast Fourier transform circuit 110
The parallel data of the symbol is supplied to the frequency assignment inverse conversion circuit 111 to be converted into one series of serial data, and the converted serial data is used as received data to perform data processing.

In the transmission system, the transmission data (serial data) is supplied to the frequency assignment conversion circuit 112 to be converted into j parallel data. The j parallel data is supplied to an inverse Fourier transform circuit (IFFT circuit) 113 to perform an inverse discrete Fourier transform at j points, thereby obtaining orthogonal digital baseband data ID and QD on the time axis. . The baseband data ID and QD are supplied to a digital / analog converter 114 to obtain analog signals of I component and Q component.

The obtained I-component and Q-component signals are supplied to a quadrature modulator 115 and quadrature-modulated based on the oscillation output fl2 of the second local oscillator 107. Quadrature modulator 115
Is supplied to the transmission mixer 116, where the oscillation output fl1 based on the channel setting information of the first local oscillator 105 is mixed and frequency-converted into a signal in the transmission frequency band fn. After the amplified signal is amplified by the power amplifier 117, the antenna switch 10
The signal is supplied to the antenna 101 via the communication terminal 2 and transmitted to each communication terminal by radio.

By performing transmission processing in this manner, a downlink signal transmitted from base station 20 to communication terminal 30 becomes a multicarrier signal assigned to the corresponding channel.

Next, processing in the communication terminal 30 of the present embodiment will be described.

The overall configuration of the communication terminal 30 is the same as that shown in FIG.
However, in this example, the configuration for transmission / reception processing is a multi-carrier system, unlike the conventional single-carrier system.

FIG. 3 is a diagram showing the configuration of the receiving unit and the transmitting unit of the communication terminal 30 of this embodiment. The transmitting / receiving antenna 201 is connected to a low noise amplifier 203 via an antenna switch 202.
03 is supplied to the reception mixer 204, the oscillation output fl1 based on the channel setting information of the first local oscillator 205 is mixed with the reception signal, and the reception signal of the predetermined frequency fn is converted to the intermediate frequency. Convert to a signal.

The intermediate frequency signal output from the reception mixer 204 is supplied to the quadrature detector 206, where the second local oscillator 2
07 is mixed and subjected to quadrature detection, separated into an I component and a Q component, and the detected I component and Q component are supplied to an analog / digital converter 208, and the respective components are digitally converted. Obtain data ID and QD. The data ID and QD are supplied to the digital filter 209, and pass only the frequency components corresponding to the corresponding channel. The signal output from the digital filter 209 is output to a fast Fourier transform circuit (FFT circuit) 210
To perform j-point discrete Fourier transform processing to obtain j-symbol parallel data.

J output from the fast Fourier transform circuit 210
The parallel data of the symbol is supplied to the frequency assignment inverse conversion circuit 211 to be a series of serial data, the converted serial data is used as reception data, and the obtained reception data is supplied to a data processing unit (not shown). Various types of data processing such as video display and audio reproduction are performed.

In the transmission system, the transmission data (serial data) is supplied to the frequency assignment conversion circuit 212 to be converted into j parallel data. The j parallel data is supplied to an inverse Fourier transform circuit (IFFT circuit) 213 to perform an inverse discrete Fourier transform at j points to obtain orthogonal digital baseband data ID and QD on the time axis. . The baseband data ID and QD are supplied to the digital / analog converter 214 to obtain analog signals of the I component and the Q component. I component and Q obtained
The component signal is supplied to the quadrature modulator 215, and quadrature-modulated based on the oscillation output fl2 of the second local oscillator 207. The signal quadrature-modulated by the quadrature modulator 215 is supplied to a transmission mixer 216, where an oscillation output fl1 based on the channel setting information of the first local oscillator 205 is mixed and frequency-converted into a signal in a transmission frequency band fn. After the frequency-converted signal is amplified by the power amplifier 217, the signal is supplied to the antenna 201 via the antenna switch 202, and transmitted to the base station by radio.

By performing transmission processing in this manner, an uplink signal transmitted from the communication terminal to the base station becomes a multicarrier signal assigned to the corresponding channel.

Next, the channel assignment using the OFDM method will be described.

FIG. 4 is a diagram showing an example of channel assignment. Here, the available communication band (20 MHz in this example)
Width) is divided into eight to provide a total of eight channels. Further, the OFDM subcarriers of each frequency channel are modulated by a method such as QPSK modulation and are arranged so as to be orthogonal to each other. Each base station uses one unique channel from CH1 to CH8, and uses, for example, TDMA / TDD (Time Division Multiple Access / T
Communication with communication terminals is performed using the ime division duplex method.

FIG. 5 is a diagram showing an example in which each channel is associated with a cell configuration. Here, the channel is assigned using the case of seven channel repetition. As a result, seven of the eight divided channels can be assigned to cells, so that a two-dimensional expansion is possible. Another one
As for the channel, a control channel common to each cell can be used. One channel is fixedly assigned to one cell.

FIG. 6 is a diagram showing an example of a frequency use state when the base station and the communication terminal perform communication. Here CH1
The upper side is the base station side and the lower side is the communication terminal side, and communication is performed using the same channel. For example, when the QPSK method is applied to the subcarrier modulation method, one of the parameters set in the OFDM method is used.
Assuming that the guard interval is 1/4, the maximum transmission rate obtained through this communication line is about 2.5 Mbps x. In addition, CH2,..., CH7 are fixedly assigned to another cell, and a total of 7 cells have a maximum transmission rate of 2.5 Mbps.
A dedicated communication band of a certain degree is secured.

FIG. 7 is a diagram showing an example of a control sequence when communication is performed between a base station and a communication terminal that has established communication. Here, the left side is the communication terminal side, and the right side is the base station side, which can access the control channel and the communication channel, respectively.

The control channel and the communication channel are, for example, TDMA / TDD (Time Division Multiple
In the case of using the tiple access / time division duplex method, it is a function channel that coexists by dividing time into the same frequency channel.

From the base station, a control signal S1 serving as an idle signal is intermittently broadcast on each downlink to each communication terminal. The communication terminal receives the control signal S1 intermittently. By performing intermittent reception in this way, for example, when the communication terminal is a device driven by a built-in battery, the duration of the battery can be extended.

Then, when there is a call request on the communication terminal side,
The transmission request signal S2 is transmitted on the uplink. Upon receiving the transmission request signal S2, the base station determines whether the communication terminal is appropriate based on the content of the signal.

After this access determination, the request acceptance signal S
3 is transmitted and notified. With this notification, the communication terminal shifts to communication, and then shifts to a communication state for transmitting the communication signal S4.

Next, a dynamic channel allocation method according to the present invention will be described. First, channel allocation is based on FIG. 4, and the channel interval is an integral multiple of the subcarrier interval.

FIG. 8 is a diagram showing an example of a method in which each base station grasps a communication situation in an adjacent cell. Here, each base station is connected using a wired route. In this example, it is assumed that the base station 1 is trying to grasp the communication status, and the base station 2
From 0, it is assumed that the base station 7 is a base station arranged in an adjacent cell.
First, a wired route is drawn from each base station to the base station 1. Note that this wired path allows information to be exchanged between base stations in both directions, and is also provided for each base station in a cell adjacent to a cell, although not shown in FIG. . As in the example shown in FIG. 8, the base station 20B,
It is assumed that the base station 320C and the base station 20F are communicating with communication terminals in each cell. At this time, the base station 20B, the base station 20C, and the base station 20F use the cell adjacent to the cell where the base station is located. Communicate through a wired route. In the base station 20A, when a transmission request is notified from the communication terminal, the base station 20A
B, it is checked that the base station 20C and the base station 20F are communicating. In addition, base station 20D, base station 20E, base station 20G
Check that is not communicating. Among them, base station 2
0B, the base station 20C, the base station 20F, etc., use the channel assigned to each cell, or use the unused channel to communicate as information. Also, understand its use schedule. In the base station 20A, the channel allocation for performing communication with the communication terminal is appropriately determined based on the information obtained from each base station and the terminal capability of the communication terminal that has requested transmission. Then, link channel allocation is performed for the communication terminal.

FIG. 9 is a diagram showing an example of a method in which each base station grasps a communication state in an adjacent cell. Here, the status of each base station is grasped using a radio path. In this example, the base station 20A
Is a base station whose communication status is to be grasped, and base stations 20B to 20G are base stations arranged in adjacent cells. Unlike FIG. 8, a wired route is not drawn. In this configuration, as in the example shown in FIG.
OB, base station 20C, and base station 20F are communicating with communication terminals in each cell. When the base station 20A is notified of the transmission request from the communication terminal, the base station 20A performs carrier sense in the used frequency band and checks the channel being used. The channel assignment for communicating with the communication terminal is determined as appropriate based on the information obtained by the carrier sense and the terminal capability of the communication terminal that has requested transmission. Then, link channel allocation is performed for the communication terminal.

FIG. 10 is a diagram showing an example of a frequency use situation. Here, the cell (CH1) in the center of the figure is a cell for confirming the communication status, a cell in which adjacent cells CH2, CH3, and CH6 are communicating, a cell in which adjacent cells CH4, CH5, and CH7 are not communicating, and cells around these cells Indicates that the cell is not to be checked.

FIG. 11 is a diagram showing an example of a control sequence when communication is performed between a base station and a communication terminal that has established communication. Here, the left side is the communication terminal side, and the right side is the base station side, which can access the control channel and the communication channel, respectively.

The control channel and the communication channel are, for example, TDMA / TDD (Time Division Multiple
In the case of using the tiple access / time division duplex method, it is a function channel that coexists by dividing time into the same frequency channel.

The base station intermittently broadcasts a control signal S1 serving as an idle signal to each communication terminal on the downlink. The communication terminal receives the control signal S1 intermittently. By performing intermittent reception in this way, for example, when the communication terminal is a device driven by a built-in battery, the duration of the battery can be extended.

Then, when there is a call request on the communication terminal side,
The transmission request signal S2 is transmitted on the uplink. Upon receiving the transmission request signal S2, the base station determines whether the communication terminal is appropriate based on the content of the signal.

At this point, the base station checks available channels. This confirmation method can be performed using the examples shown in FIGS.

After this access determination, the request acceptance signal S
3 is transmitted and notified. This information includes information on the channel used. With this notification, the communication terminal shifts to communication, and then shifts to a communication state for transmitting the communication signal S4.

FIG. 12 is a diagram showing an example of the configuration of a base station. Here, an example in which communication is performed on the Internet network 12 is described. In this case, the base station 20 performs line control such as call connection with the network by the line control unit 21 connected to the Internet network 12. The received data from the network side decomposed by the line control unit 21 is sent to a channel coding / decoding unit 23, where it is converted into a radio transmission format.
After being subjected to modulation processing such as PSK modulation, the transmission section 25 performs transmission processing such as frequency conversion and amplification, and
Is transmitted wirelessly to the communication terminal.

The signal transmitted from the communication terminal side is
After receiving processing such as frequency conversion is performed by a receiving unit 27 connected to an antenna 26, demodulation of received data is performed by a demodulation unit 28, and the demodulated received data is supplied to a channel coding / decoding unit 23. Then, a decoding process is performed. Then, the data assembled by the line control unit 21 is transmitted to the network side.

Note that these processes in the base station 20 are executed under the control of the central control unit (CPU) 22 via the bus line BL. When the base station 20 is installed, it receives the channel assignment of the main channel. The main channel is used for the control signal and the like, and after the line is connected to the communication terminal, the channel is allocated based on the dynamic channel setting information from the CPU 22. Information for channel assignment performed by the CPU 22 is obtained from the inter-base station communication line control unit 21. Base station communication line controller 21
Is connected to a wired network between base stations, obtains information from other base stations, and notifies its own information.

FIG. 13 is a diagram showing another example of the configuration of the base station. Here, there is an example in which communication is performed on the Internet network 12, and the base station 20 performs line control such as call connection with the network by the line control 2a connected to the Internet network 12. The received data from the network side decomposed by the line control unit 21 is channel-coded /
The data is sent to the decoding unit 23, converted into a wireless transmission format, and the converted data is subjected to modulation processing by QPSK modulation or the like by the modulation unit 24, and then transmission processing such as frequency conversion or amplification is performed by the transmission unit 25. And antenna 2
6 to the communication terminal.

The signal transmitted from the communication terminal side is
After receiving processing such as frequency conversion is performed by a receiving unit 27 connected to an antenna 26, demodulation of received data is performed by a demodulation unit 28, and the demodulated received data is supplied to a channel coding / decoding unit 23. Then, a decoding process is performed. Then, the data assembled by the line control unit 21 is transmitted to the network side.

The above processing in the base station 20 is executed under the control of the central control unit (CPU) 22 via the bus line BL. When the base station 20 is installed, it receives the channel assignment of the main channel. The main channel is used for the control signal and the like, and after the line is connected to the communication terminal, the channel is allocated based on the dynamic channel setting information from the CPU 22. Information for channel assignment performed by the CPU 22 is obtained from the demodulation unit 28. The demodulation unit 28 checks available channels by performing carrier sense.

As shown in FIG. 14, the receiving terminal 32 connected to the antenna 31 performs a receiving process such as frequency conversion, and then demodulates the received data by the demodulating unit 33. The demodulated received data is supplied to a channel coding / decoding unit 34,
The conversion from the wireless transmission format is performed. The converted data is transmitted to the central control unit (CP
U) is supplied to 35, processed for display, and then supplied to the display unit 36.

The transmission data generated based on the operation of the operation unit 37 connected to the central control unit (CPU) 35 is transmitted to the channel coding / decoding unit 34.
Is converted to a wireless transmission format, and the converted data is subjected to modulation processing by QPSK modulation or the like by a modulation unit 38, and then transmission processing such as frequency conversion or amplification is performed by a transmission unit 39. 31 is wirelessly transmitted to the base station. The dynamic channel setting information set at this time is extracted from the request reception signal notified from the base station.

By preparing a base station and a communication terminal as such a system and connecting to an Internet network or the like, the communication terminal 30 can receive Internet broadcasts from various content servers.

Next, the processing in the base station of this example will be described.

The overall configuration of the base station 20 is the same as that of the conventional base station 120 shown in FIG. 23, but in this example, the configuration for transmission / reception processing is different from that of the conventional single carrier system. It is a carrier system.

FIG. 15 is a diagram showing the configuration of the receiving unit and the transmitting unit of the base station 20 of the present example. The transmitting and receiving antenna 101 is connected to a low noise amplifier 103 via an antenna switch 102.
03 is supplied to the reception mixer 104, the oscillation output fl1 based on the dynamic channel setting information of the first local oscillator 105 is mixed with the reception signal, and the reception signal of the predetermined frequency band fn is mixed. Into an intermediate frequency signal.

The intermediate frequency signal output from the reception mixer 104 is supplied to the quadrature detector 106, and the second local oscillator 1
07 is mixed and subjected to quadrature detection, separated into an I component and a Q component, and the detected I component and Q component are supplied to an analog / digital converter 108, and the digital value of each component is output. Obtain data ID and QD. The data ID and QD are supplied to the digital filter 109, and pass only the frequency components based on the dynamic channel setting information. The signal output from the digital filter 109 is output to a fast Fourier transform circuit (F
(FT circuit) 110 to perform a discrete Fourier transform process on the number of points based on the dynamic channel setting information, thereby obtaining parallel data having the same number of symbols as the number of points.

The parallel data output from the fast Fourier transform circuit 110 is supplied to a frequency assignment inverse transform circuit 111 to be converted into one-series serial data using only desired k symbols. And data processing is performed.

In the transmission system, the transmission data (serial data) is supplied to the frequency assignment conversion circuit 112, and the transmission data in which k symbols are assigned to desired positions is converted into the number of parallel data based on the dynamic channel setting information. I do. The parallel data is supplied to an inverse Fourier transform circuit (IFFT circuit) 113, which performs an inverse discrete Fourier transform of the number of points based on the dynamic channel setting information, and obtains digital baseband data ID and ID on the orthogonal time axis. Obtain QD. The baseband data ID and QD are supplied to a digital / analog converter 114 to obtain analog signals of I component and Q component. The obtained signals of the I component and the Q component are supplied to the quadrature modulator 115, and the oscillation output f of the second local oscillator 107 is output.
Quadrature modulation is performed based on l2. The signal quadrature-modulated by the quadrature modulator 115 is supplied to a transmission mixer 116,
The oscillation output fl1 based on the dynamic channel setting information of the local oscillator 105 is mixed to generate a transmission frequency band fn.
The frequency-converted signal is amplified by a power amplifier 117, supplied to the antenna 101 via the antenna switch 102, and transmitted to each communication terminal by radio.

By performing transmission processing in this way, a downlink signal transmitted from the base station to the communication terminal becomes a multicarrier signal based on the dynamic channel setting information.

Next, the processing in the communication terminal 30 of this example will be described.

FIG. 16 is a diagram showing the configuration of the receiving unit and the transmitting unit of the communication terminal 30 of this example. The transmitting / receiving antenna 201 is connected to a low-noise amplifier 203 via an antenna switch 202, and the received signal amplified by the low-noise amplifier 203 is supplied to a receiving mixer 204, and the first local oscillator 205 The oscillation output fl1 based on the dynamic channel setting information is mixed with the received signal, and the received signal having the predetermined frequency fn is converted into an intermediate frequency signal.

The intermediate frequency signal output from the reception mixer 204 is supplied to the quadrature detector 206, where the second local oscillator 2
07 is mixed and subjected to quadrature detection, separated into an I component and a Q component, and the detected I component and Q component are supplied to an analog / digital converter 208, and the respective components are digitally converted. Obtain data ID and QD. The data ID and QD are supplied to the digital filter 209, and pass only the frequency components based on the dynamic channel setting information. The signal output from the digital filter 209 is output to a fast Fourier transform circuit (F
(FT circuit) 210 to perform a discrete Fourier transform process on the number of points based on the dynamic channel setting information to obtain parallel data having the same number of symbols as the number of points.

The parallel data output from the fast Fourier transform circuit 210 is supplied to a frequency assignment inverse transform circuit 211 so as to be converted into one series of serial data using only desired k symbols. The obtained reception data is supplied to a data processing unit (not shown), and various data processing such as video display and audio reproduction is performed.

In the transmission system, the transmission data (serial data) is supplied to a frequency assignment conversion circuit 212, and the transmission data in which k symbols are assigned to a desired position is converted into the number of parallel data based on the dynamic channel setting information. I do. The parallel data is supplied to an inverse Fourier transform circuit (IFFT circuit) 213, which performs an inverse discrete Fourier transform of the number of points based on the dynamic channel setting information, and obtains digital baseband data ID and ID on the orthogonal time axis. Obtain QD. The baseband data ID and QD are supplied to the digital / analog converter 214 to obtain analog signals of the I component and the Q component. The obtained signals of the I component and the Q component are supplied to the quadrature modulator 215, and the oscillation output f of the second local oscillator 207 is output.
Quadrature modulation is performed based on l2. The signal quadrature-modulated by the quadrature modulator 215 is supplied to a transmission mixer 216,
The oscillation output fl1 based on the dynamic channel setting information of the local oscillator 205 is mixed to generate a transmission frequency band fn.
The frequency-converted signal is amplified by a power amplifier 217, supplied to the antenna 201 via the antenna switch 202, and transmitted to the base station by radio.

By performing transmission processing in this way, an uplink signal transmitted from the communication terminal to the base station becomes a multicarrier signal based on the dynamic channel setting information.

FIG. 17 is a diagram showing an example of a frequency use state when the base station and the communication terminal perform communication. Here, another channel not used in the adjacent cell is also used. The upper side is the base station side, and the lower side is the communication terminal side, and communication is performed using the allocated channel. The assigned channel is a continuous channel of CH1, CH2, CH3, and CH4. For example, if the QPSK method is applied to the modulation method of the subcarrier, one of the parameters set in the OFDM method, the guard interval is １ ／, and the used channel is the total of four channels using three adjacent cells. The maximum transmission rate obtained through this communication line is about 10 Mbps. As a result, dynamic channel allocation that enables effective use of frequency and high-speed communication can be performed.

Here, DC in FIG. 17 indicates a DC component. Assuming that the center frequency of the channel is fn as shown in FIG. 4, modulation and demodulation are performed in the radio block so that this frequency corresponds to the DC component of the baseband. However, in FIG. 17, four channels are handled as a single block, and modulation and demodulation are performed by a radio block so that the center of the four channels is a DC component. Note that DC indicated by a broken line in FIG. 17 will be described later together with FIG.

FIG. 18 is a diagram showing another example of the frequency use state when the base station and the communication terminal perform communication. Here, another channel not used in the adjacent cell is also used. The upper side is the base station side, and the lower side is the communication terminal side, and communication is performed using the allocated channel. The assigned channels are discontinuous channels CH1, CH4, CH5, and CH7. For example, applying the QPSK method to the modulation method of the subcarrier, one of the parameters set in the OFDM method, the guard interval is set to 1/4,
Assuming that the used channels are also the channels of three adjacent cells, that is, a total of 4 channels, the maximum transmission rate obtained through this communication line is about 10 Mbps. As a result, dynamic channel allocation that enables effective use of frequency and high-speed communication can be performed.

Incidentally, as in FIG. 17, DC in FIG. 18 indicates a DC component. In this case, the center of the entire band is a DC component. To handle in common with the case of FIG.
In FIG. 17, it is also conceivable that the center of the entire band is a DC component.

FIG. 19 is a diagram showing another example of the frequency use state when the base station and the communication terminal perform communication. Here, another channel not used in the adjacent cell is also used. The upper side is the base station side, and the lower side is the communication terminal side, and communication is performed using the allocated channel. The assigned channels are discontinuous channels CH1, CH4, CH5, and CH7. However, the case where the base station has the ability to use all the assigned channels, the communication terminal can use all the assigned channels only, and the transmitting unit has the ability to transmit only the signal for one channel is shown. I have. For example, applying the QPSK method to the modulation method of the subcarrier, one of the parameters set in the OFDM method, the guard interval is set to 1/4,
Assuming that the used channels are also the channels of three adjacent cells, that is, a total of 4 channels, the maximum transmission rate obtained on this communication downlink is about 10 Mbps, and the maximum transmission rate obtained on this communication uplink is 2.5 Mbps.
About. As a result, dynamic channel allocation can be performed in which effective use of frequency and high-speed communication can be performed while easily considering the terminal capability of the communication terminal.

Incidentally, as in FIG. 17, DC in FIG. 19 indicates a DC component. However, in this case, in the processing for the downlink, the center of the entire band becomes the DC component as described above, but in the processing for the uplink, the center for one channel or the center of the entire band can be the DC component. .

FIGS. 20A and 20B show, for example, FIG.
Frequency assignment conversion circuits 110 and 21 used in FIG.
0 is a diagram showing an example of subcarrier arrangement (conversion) of the frequency assignment inverse conversion circuits 112 and 212. FIG. Here, the transmission data (serial data) is allocated to a desired position corresponding to a channel given k symbols on the frequency allocation conversion circuit side, and m parallel data is generated without arranging a signal on an empty carrier, and IFFT is performed. And the desired k corresponding to the channel given from the m parallel data supplied from the FFT on the frequency assignment inverse transform circuit side.
Received data (serial data) is generated using only symbols.

Next, a case where this configuration is applied to a spot area as it is will be described.

FIG. 21 is a diagram showing an example of a frequency use state when a base station and a communication terminal perform communication. Here, when an arbitrary channel is used, the upper side is the base station side and the lower side is the communication terminal side, and communication is performed using the same channel. For example, when the QPSK method is applied to the subcarrier modulation method, one of the parameters set in the OFDM method is used.
If the guard interval is 1/4 and the number of used channels is 4, the maximum transmission rate obtained through this communication line is about 10 Mbps.

Note that, as in FIG. 17, DC in FIG. 21 indicates a DC component. Also in this case, two DC components can be selected.

FIG. 22 is a diagram showing an example of a frequency use state when the base station and the communication terminal perform communication. Here, all channels are used, the upper side is the base station side, and the lower side is the communication terminal side, and communication is performed using the same channel. For example, when the QPSK method is applied to the subcarrier modulation method, one of the parameters set in the OFDM method is used.
If the guard interval is reduced to 1/4 and the number of used channels is set to 8, the maximum transmission rate obtained through this communication line is about 20 Mbps.

In these communications shown in FIGS. 21 and 22, a plurality of channel allocations among the dynamic channel allocations can be treated as fixed allocations.
5. The configurations of the base station and the communication terminal shown in FIG. 16 can be used as they are.

That is, the communication terminal can communicate with both the base station assigned with the dynamic channel and the base station assigned with the fixed channel using the same hardware.

Incidentally, as in FIG. 17, DC in FIG. 22 indicates a DC component.

Here, in the above description, the filter 109 that allows a desired frequency component to pass according to the dynamic channel setting information is arranged at the position of the digital signal processing unit. However, this is not limited to this. The filtering process may be performed by the analog signal processing unit. Further, the channel arrangement in the present invention is not limited to the channel arrangement shown in FIG. 4, and for example, each channel may be divided into two and arranged symmetrically with respect to the center of the entire band.

As shown in FIG. 17 and the like, when the center frequency can be selected, the center frequency on the transmitting side and the center frequency on the receiving side may be different. For example, FIG. 18 shows a case where the transmitting unit on the communication terminal side performs modulation at f1, and the receiving unit on the base station side demodulates so that the center of the entire band is a DC component. In this case, it is necessary to correct the phase rotation amount of the signal, and this function is usually provided in the receiving unit on the communication terminal side. Note that a function of transmitting a signal whose phase has been rotated in advance by the base station may be provided.

[0116]

As described above, according to the present invention, one frequency channel is configured by a multicarrier according to the DFDM system, and in a wireless data communication system having a plurality of frequency channels, the transmission rate of the user is dynamically allocated by the channel allocation. Can be varied according to the situation of the neighboring cells, and an optimal system can be provided for Internet access by best effort. Further, when base stations are arranged without adjacent base stations, a plurality of channels can be fixedly assigned as one channel, and the maximum transmission speed in the spot service can be increased. In addition, the dynamic channel allocation method according to the present invention can be configured without having a plurality of base stations, transmission / reception units of a communication terminal, and a plurality of modulation / demodulation units, and can configure a system with reduced hardware costs. is there.

[Brief description of the drawings]

FIG. 1 is a configuration diagram illustrating an example of a wireless access system to which the present invention is applied.

FIG. 2 is a block diagram illustrating an example of wireless processing of a base station which is a basis of the present invention.

FIG. 3 is a block diagram illustrating an example of wireless processing of a communication terminal which is a basis of the present invention.

FIG. 4 is a diagram showing a channel assignment which is a basis of the present invention.

FIG. 5 is a diagram illustrating a relationship example between a channel and a cell configuration, which are the basis of the present invention.

FIG. 6 is a diagram showing an example of a frequency utilization state which is a basis of the present invention.

FIG. 7 is a diagram showing an example of a basic control sequence of the present invention.

FIG. 8 is a diagram illustrating an example of a communication status grasping method using a wired path according to the present invention.

FIG. 9 is a diagram showing an example of a communication status grasping method using a wireless channel according to the present invention.

FIG. 10 is a diagram illustrating an example of a frequency usage situation on a cell configuration according to the present invention.

FIG. 11 is a diagram showing an example of a control sequence according to the present invention.

FIG. 12 is a block diagram illustrating an example of a configuration of a base station according to the present invention.

FIG. 13 is a block diagram illustrating an example of a configuration of a base station according to the present invention.

FIG. 14 is a block diagram illustrating an example of a configuration of a communication terminal according to the present invention.

FIG. 15 is a block diagram illustrating an example of wireless processing of a base station according to the present invention.

FIG. 16 is a block diagram illustrating an example of wireless processing of a communication terminal according to the present invention.

FIG. 17 is a diagram showing an example of dynamic channel allocation according to the present invention.

FIG. 18 is a diagram illustrating an example of dynamic channel allocation according to the present invention.

FIG. 19 is a diagram illustrating an example of dynamic channel allocation according to the present invention.

FIG. 20 is a diagram illustrating an example of a subcarrier arrangement according to the present invention.

FIG. 21 is a diagram illustrating an example of channel assignment in spot use according to the present invention.

FIG. 22 is a diagram illustrating an example of channel assignment in spot use according to the present invention.

FIG. 23 is a block diagram illustrating an example of a configuration of a conventional base station.

FIG. 24 is a block diagram illustrating an example of a configuration of a conventional communication terminal.

FIG. 25 is a diagram illustrating an example of a conventional frequency use state.

[Explanation of symbols]

12 Internet network, 20 base stations, 21 line control unit, 22 CPU, 23 channel coding /
Decoding section, 24 modulation section, 25 transmission section, 26
Antenna, 27 receiver, 28 demodulator, 30 communication terminal, 31 antenna, 32 receiver, 33 demodulator,
34 Chanenle coding / decoding section, 3
5 CPU, 36 display unit, 37 operation units 37, 38
Modulator, 39 transmitter, 101 antenna, 102 antenna switch, 103 low noise amplifier, 104
Receiving mixer, 105 first local oscillator, 106 quadrature detector, 107 second local oscillator, 108 analog / digital converter, 109 digital filter, 110
Fast Fourier transform circuit, 111 frequency assignment inverse transform circuit, 112 frequency assignment transform circuit, 113 inverse Fourier transform circuit, 114 digital / analog converter, 1
15 quadrature modulator, 116 transmission mixer, 117 power amplifier, 201 antenna, 202 antenna switch, 203 low noise amplifier, 204 reception mixer, 2
05 first local oscillator, 206 quadrature detector, 207 second local oscillator, 208 analog / digital converter,
209 digital filter, 210 fast Fourier transform circuit, 211 frequency assignment inverse transform circuit, 212 frequency assignment transform circuit, 213 inverse Fourier transform circuit, 2
14. Digital / analog converter, 215 quadrature modulator, 216 transmission mixer, 217 power amplifier

Continued on the front page F term (reference) 5K022 DD01 DD13 DD19 DD23 DD33 DD54 5K033 AA02 AA04 DA01 DA17 DB09 DB14 DB16 5K034 AA02 AA10 EE03 FF04 FF05 FF13 HH01 HH02 KK01 5K067 BB02 BB21 EE02 EE11 EE11 EE11 EE11 EE21 EE21

Claims (42)

[Claims] 1. One frequency channel is OFDM (Ort
hogonal Frequency Division Multiplex)
A radio communication system comprising a multi-carrier composed of sub-carriers, having i frequency channels (CH1_CHi), and comprising a base station and a plurality of mobile stations that allocate the frequency channels for each radio zone. A channel allocation control means for allocating k frequency channels other than the frequency channel CHx to the mobile station in response to a communication request from the mobile station using the allocated frequency channel CHx of the wireless zone; and the frequency channel CHx. A radio base station apparatus comprising: transmitting and receiving means for transmitting and receiving data to and from the mobile station, by using k + 1 (k ≦ i−1) frequency channels including The base station is communicated with using the allocated frequency channel CHx of the wireless zone. A channel control means for making a request and receiving allocation of k frequency channels other than the frequency channel CHx from the base station; and a set of k + 1 (k ≦ i−1) frequency channels including the frequency channel CHx. A wireless mobile station device comprising: a transmission / reception unit configured to transmit / receive data to / from a base station as a frequency channel based on OFDM multicarrier. 2. The wireless communication system according to claim 1, wherein subcarriers of each frequency channel are arranged so as to be orthogonal to each other. 3. An OFDM (Ort)
hogonal Frequency Division Multiplex)
A radio base station in a radio communication system comprising a base station that is configured by multicarriers of sub-carriers, has i frequency channels (CH1_CHi), and allocates the frequency channels for each radio zone, and a plurality of mobile stations A station device, in response to a communication request from the mobile station using the allocated frequency channel CHx of the wireless zone, a channel allocation control means for allocating k frequency channels other than the frequency channel CHx to the mobile station; K + 1 (k ≦ i−) including the frequency channel CHx
A radio base station apparatus comprising: transmitting and receiving means for transmitting and receiving data to and from the mobile station by using the frequency channel of 1) as a set of OFDM multi-frequency channels. 4. One frequency channel is called OFDM (Ort
hogonal Frequency Division Multiplex)
Radio channel in a radio communication system composed of a base station and a plurality of mobile stations, each of which is composed of multicarriers of subcarriers, has i frequency channels (CH1_CHi), and allocates the frequency channels for each radio zone. A channel control means for making a communication request to the base station using the allocated frequency channel CHx of the radio zone, and receiving an allocation of k frequency channels other than the frequency channel CHx from the base station. K + 1 (k ≦ i−) including the frequency channel CHx
A radio mobile station apparatus comprising: transmitting / receiving means for transmitting / receiving data to / from a base station by using the frequency channel of 1) as a set of frequency channels based on OFDM multicarrier. 5. One frequency channel is OFDM (Ort
hogonal Frequency Division Multiplex)
Wireless communication in a wireless communication system comprising a base station and a plurality of mobile stations, which is configured by multi-carriers of sub-carriers, has i frequency channels (CH1_CHi), and allocates the frequency channels to each wireless zone. The method, wherein the mobile station makes a communication request to the base station using the allocated frequency channel CHx of the radio zone, and the base station moves the k frequency channels other than the frequency channel CHx. After that, the base station and the mobile station transmit and receive data by using k + 1 (k ≦ i−1) frequency channels including the frequency channel CHx as a set of OFDM multicarrier frequency channels. A wireless communication method. 6. The subcarrier of each frequency channel is:
6. The device according to claim 5, wherein the components are arranged to be orthogonal to each other.
The wireless communication method as described. 7. An OFDM (Ort)
hogonal Frequency Division Multiplex)
A radio communication system comprising a multi-carrier composed of sub-carriers, having i frequency channels (CH1_CHi), and comprising a base station and a plurality of mobile stations that allocate the frequency channels for each radio zone. In response to a communication request from the mobile station using the allocated frequency channel CHx of the wireless zone, k frequency channels other than the frequency channel CHx are allocated to one of the downlink and the uplink of the mobile station. Control means and k + 1 (k ≦ i−) including the frequency channel CHx in one of the downlink and the uplink.
A radio base station apparatus including transmission / reception means for transmitting / receiving data to / from the mobile station using the frequency channel of 1) using a set of frequency channels based on OFDM multicarrier; and a frequency channel allocated to the radio zone. Channel control means for making a communication request to the base station using CHx, and receiving from the base station an allocation of k frequency channels other than the frequency channel CHx to one of the downlink and uplink, and a downlink or uplink. Data transmission / reception is performed between the base station and k + 1 (k ≦ i−1) frequency channels including the frequency channel CHx on one side of the line using a set of frequency channels based on OFDM multicarrier. A wireless communication system comprising: a wireless mobile station device having a transmitting / receiving means. 8. The radio communication system according to claim 7, wherein subcarriers of each frequency channel are arranged so as to be orthogonal to each other. 9. The method of claim 1, wherein one frequency channel is OFDM (Ort
hogonal Frequency Division Multiplex)
A radio base station in a radio communication system comprising a base station that is configured by multicarriers of sub-carriers, has i frequency channels (CH1_CHi), and allocates the frequency channels for each radio zone, and a plurality of mobile stations A station device, the mobile station transmits k frequency channels other than the frequency channel CHx in response to a communication request using the allocated frequency channel CHx of the wireless zone in the downlink or uplink of the mobile station. Channel allocation control means to be allocated to one of the frequency channels;
Transmission / reception means for transmitting / receiving data to / from the mobile station by using a set of frequency channels based on a multicarrier of the OFDM scheme with k + 1 (k ≦ i−1) frequency channels including Hx. A wireless base station device characterized by the following. 10. One frequency channel is OFDM (ODM).
(rthogonal Frequency Division Multiplex), which is composed of multicarriers with j subcarriers, has i frequency channels (CH1_CHi), and is composed of a base station and a plurality of mobile stations that allocate the frequency channels to each radio zone. A wireless mobile station device in a wireless communication system, wherein a communication request is made to the base station using the allocated frequency channel CHx of the wireless zone, and the frequency channel is transmitted from the base station to one of a downlink or an uplink. CH
channel control means for receiving an allocation of k frequency channels other than x, and the frequency channel C on one of a downlink and an uplink.
Transmission / reception means for transmitting / receiving data to / from the base station by using a set of frequency channels based on a multicarrier of the OFDM scheme with k + 1 (k ≦ i−1) frequency channels including Hx. A wireless mobile station device characterized by the following. 11. One frequency channel is OFDM (O
(rthogonal Frequency Division Multiplex), which is composed of multicarriers with j subcarriers, has i frequency channels (CH1_CHi), and is composed of a base station and a plurality of mobile stations that allocate the frequency channels to each radio zone. A mobile communication method in a wireless communication system, wherein the mobile station makes a communication request to the base station using an allocated frequency channel CHx of the radio zone, and the base station performs k requests other than the frequency channel CHx. Number of frequency channels are assigned to the mobile station, and then the base station or the mobile station transmits to the mobile station or the base station k + 1 including the frequency channel CHx.
Number (k ≦ i−1) of frequency channels as one set of OFDM
As a multi-carrier frequency channel,
A wireless communication method, wherein the mobile station or the base station transmits data to the base station or the mobile station using the frequency channel CHx. 12. The radio communication method according to claim 11, wherein subcarriers of each frequency channel are arranged so as to be orthogonal to each other. 13. An OFDM (ODM)
(rthogonal Frequency Division Multiplex), which is composed of multicarriers with j subcarriers, has i frequency channels (CH1_CHi), and is composed of a base station and a plurality of mobile stations that allocate the frequency channels to each radio zone. A radio communication system, comprising: determining k available frequency channels other than the frequency channel CHx in response to a communication request from the mobile station using the allocated frequency channel CHx of the radio zone; a channel allocation control means for allocating k frequency channels to the mobile station; and k + 1 (k ≦ i−1) frequency channels including the frequency channel CHx as a set of OFDM multicarrier frequency channels. Transmission / reception means for transmitting / receiving data to / from a mobile station. A radio base station device, a channel control unit that makes a communication request to the base station using the allocated frequency channel CHx of the radio zone, and receives allocation of k frequency channels other than the frequency channel CHx from the base station. A transmission / reception unit for transmitting / receiving data to / from a base station by using k + 1 (k ≦ i−1) frequency channels including the frequency channel CHx as a set of OFDM multicarrier frequency channels. A wireless communication system comprising a mobile station device. 14. The apparatus according to claim 1, wherein subcarriers of each frequency channel are arranged so as to be orthogonal to each other.
3. The wireless communication system according to 3. 15. One frequency channel is called OFDM (ODM).
(rthogonal Frequency Division Multiplex), which is composed of multicarriers with j subcarriers, has i frequency channels (CH1_CHi), and is composed of a base station and a plurality of mobile stations that allocate the frequency channels to each radio zone. A radio base station apparatus in a radio communication system, wherein, in response to a communication request from the mobile station using the allocated frequency channel CHx of the radio zone, k available frequency channels other than the frequency channel CHx are used. Channel allocation control means for deciding and allocating the determined k frequency channels to the mobile station; k + 1 (k ≦ i−
A radio base station apparatus comprising: transmitting and receiving means for transmitting and receiving data to and from the mobile station by using the frequency channel of 1) as a set of OFDM multi-frequency channels. 16. The radio base station apparatus according to claim 15, wherein said assigning channel allocation control means determines k available frequency channels other than said frequency channel CHx by carrier sense processing. 17. The apparatus according to claim 15, wherein the allocation assignment control means determines k available frequency channels other than the frequency channel CHx by performing communication processing with another radio base station apparatus. Wireless base station device. 18. One frequency channel is called OFDM (O
(rthogonal Frequency Division Multiplex), which is composed of multicarriers with j subcarriers, has i frequency channels (CH1_CHi), and is composed of a base station and a plurality of mobile stations that allocate the frequency channels to each radio zone. A radio communication method in a radio communication system, wherein the mobile station makes a communication request to the base station using an allocated frequency channel CHx of the radio zone, and the base station uses a frequency channel other than the frequency channel CHx. The possible k frequency channels are determined, and the determined k frequency channels are assigned to the mobile station. Thereafter, the base station and the mobile station perform k + 1 (k ≦ i−1) including the frequency channel CHx. ) Is used as a set of OFDM multi-carrier frequency channels, and Wireless communication method for transmitting and receiving data. 19. The method according to claim 1, wherein subcarriers of each frequency channel are arranged so as to be orthogonal to each other.
9. The wireless communication method according to item 8. 20. The radio communication method according to claim 18, wherein k available frequency channels other than the frequency channel CHx are determined by a carrier sense process. 21. The radio communication method according to claim 18, wherein k available frequency channels other than the frequency channel CHx are determined by a communication process with another radio base station. 22. One frequency channel is referred to as OFDM (O
(rthogonal Frequency Division Multiplex), which is composed of multicarriers with j subcarriers, has i frequency channels (CH1_CHi), and is composed of a base station and a plurality of mobile stations that allocate the frequency channels to each radio zone. A radio communication system, comprising: determining k available frequency channels other than the frequency channel CHx in response to a communication request from the mobile station using the allocated frequency channel CHx of the radio zone; channel allocation control means for allocating k frequency channels to one of the downlink and uplink of the mobile station; and the frequency channel C to one of the downlink or uplink.
A radio base station comprising: transmission / reception means for transmitting / receiving data to / from the mobile station by using a set of frequency channels based on a multicarrier of the OFDM scheme with k + 1 (k ≦ i−1) frequency channels including Hx. A communication request to the base station, using the assigned frequency channel CHx of the radio zone, and assigning k frequency channels other than the frequency channel CHx to one of the downlink and the uplink by the base station. And a channel control means for receiving from the channel channel, and k + 1 (k ≦ i−1) frequency channels including the frequency channel CHx on one of the downlink and the uplink using a set of OFDM multicarrier frequency channels. And a radio mobile station device comprising a transmission / reception means for transmitting / receiving data to / from a mobile station. A wireless communication system, characterized by: 23. The subcarriers of each frequency channel are arranged so as to be orthogonal to each other.
3. The wireless communication system according to 2. 24. One frequency channel is called OFDM (ODM).
(rthogonal Frequency Division Multiplex), which is composed of multicarriers with j subcarriers, has i frequency channels (CH1_CHi), and is composed of a base station and a plurality of mobile stations that allocate the frequency channels to each radio zone. A radio base station apparatus in a radio communication system, wherein, in response to a communication request from the mobile station using the allocated frequency channel CHx of the radio zone, k available frequency channels other than the frequency channel CHx are used. Channel allocation control means for deciding and allocating the determined k frequency channels to one of the downlink or uplink of the mobile station; and the frequency channel C to one of the downlink or uplink.
Transmission / reception means for transmitting / receiving data to / from the mobile station by using a set of frequency channels based on a multicarrier of the OFDM scheme with k + 1 (k ≦ i−1) frequency channels including Hx. A wireless base station device characterized by the following. 25. The radio base station apparatus according to claim 24, wherein the channel allocation control means determines k available frequency channels other than the frequency channel CHx by carrier sense processing. 26. The apparatus according to claim 24, wherein the channel allocation control means determines k usable frequency channels other than the frequency channel CHx by performing communication processing with another radio base station apparatus. Wireless base station device. 27. One frequency channel is called OFDM (O
(rthogonal Frequency Division Multiplex), which is composed of multicarriers with j subcarriers, has i frequency channels (CH1_CHi), and is composed of a base station and a plurality of mobile stations that allocate the frequency channels to each radio zone. A radio communication method in a radio communication system, wherein the mobile station makes a communication request to the base station using an allocated frequency channel CHx of the radio zone, and the base station uses a frequency channel other than the frequency channel CHx. The possible k frequency channels are determined, and the determined k frequency channels are assigned to the mobile station. Thereafter, the base station and the mobile station perform k + 1 (k ≦ i−1) including the frequency channel CHx. ) Is used as a set of OFDM multi-carrier frequency channels, and Wireless communication method for transmitting and receiving data. 28. The method according to claim 2, wherein subcarriers of each frequency channel are arranged so as to be orthogonal to each other.
7. The wireless communication method according to 7. 29. The radio communication method according to claim 27, wherein k usable frequency channels other than the frequency channel CHx are determined by a carrier sense process. 30. The wireless communication method according to claim 27, wherein k available frequency channels other than the frequency channel CHx are determined by a communication process with another wireless base station. 31. One frequency channel is called OFDM (O
(rthogonal Frequency Division Multiplex), which is composed of multicarriers with j subcarriers, has i frequency channels (CH1_CHi), and is composed of a base station and a plurality of mobile stations that allocate the frequency channels to each radio zone. The number of channels that can be communicated simultaneously from the mobile station using the allocated frequency channel CHx of the radio zone.
≧ 1) In response to a communication request including the information of ≧ 1), k frequency channels satisfying y−k ≧ 1 other than the frequency channel CHx are determined, and the determined k frequency channels are transmitted to the mobile station. Means for allocating a channel and assigning k + 1 (k ≦ i−1) frequency channels including the frequency channel CHx to a set of OFDM multicarrier frequency channels to transmit and receive data to and from the mobile station. And a number y of channels that can be simultaneously communicated with the base station using the allocated frequency channel CHx of the wireless zone.
Channel control means for making a communication request including the information of 1) and receiving allocation of k frequency channels other than the frequency channel CHx from the base station, and k + 1 (k ≦ i−1) including the frequency channel CHx A radio mobile station apparatus comprising: a transmission / reception unit that transmits / receives data to / from the base station, using the frequency channel of (1) as a set of frequency channels using OFDM multicarrier. 32. The subcarriers of each frequency channel are arranged so as to be orthogonal to each other.
2. The wireless communication system according to 1. 33. One frequency channel is called OFDM (ODM).
(rthogonal Frequency Division Multiplex), which is composed of multicarriers with j subcarriers, has i frequency channels (CH1_CHi), and is composed of a base station and a plurality of mobile stations that allocate the frequency channels to each radio zone. A wireless base station device in a wireless communication system, wherein the number of channels y (y
≧ 1) In response to a communication request including the information of ≧ 1), k frequency channels satisfying y−k ≧ 1 other than the frequency channel CHx are determined, and the determined k frequency channels are transmitted to the mobile station. Channel allocation control means to be allocated, and k + 1 (k ≦ i−) including the frequency channel CHx.
A radio base station apparatus comprising: transmitting and receiving means for transmitting and receiving data to and from the mobile station by using the frequency channel of 1) as a set of OFDM multi-frequency channels. 34. One frequency channel is called OFDM (ODM).
(rthogonal Frequency Division Multiplex), which is composed of multicarriers with j subcarriers, has i frequency channels (CH1_CHi), and is composed of a base station and a plurality of mobile stations that allocate the frequency channels to each radio zone. A wireless mobile station device in a wireless communication system, wherein the number of channels y (y ≧ y) that can be simultaneously communicated with the base station using the allocated frequency channel CHx of the wireless zone.
Channel control means for making a communication request including the information of 1) and receiving allocation of k frequency channels other than the frequency channel CHx from the base station; and k + 1 (k ≦ i−) channels including the frequency channel CHx.
A radio mobile station apparatus comprising: transmitting and receiving means for transmitting and receiving data to and from the base station, wherein the frequency channel of 1) is a frequency channel of one set of OFDM multicarriers. 35. One frequency channel is called OFDM (ODM).
(rthogonal Frequency Division Multiplex), which is composed of multicarriers with j subcarriers, has i frequency channels (CH1_CHi), and is composed of a base station and a plurality of mobile stations that allocate the frequency channels to each radio zone. A mobile communication method in a wireless communication system, wherein the mobile station uses the allocated frequency channel CHx of the radio zone to perform communication including information on the number y (y ≧ 1) of channels that can simultaneously communicate with the base station. Making a request, the base station allocates k frequency channels other than the frequency channel CHx satisfying y−k ≧ 1 to the mobile station, and then the base station and the mobile station allocate the frequency channel CHx to the mobile station. K + 1 (k ≦ i−1) frequency channels including a set of OFDM multicarriers A wireless communication method for transmitting and receiving data. 36. The subcarriers of each frequency channel are arranged so as to be orthogonal to each other.
6. The wireless communication method according to 5. 37. One frequency channel is called OFDM (ODM).
(rthogonal Frequency Division Multiplex), which is composed of j subcarriers in a multicarrier, has i frequency channels (CH1_CHi), and is composed of a base station and a plurality of mobile stations that allocate the frequency channels to each radio zone. Radio communication system, wherein the number of channels y (y
In response to a communication request including information of ≧ 1), k frequency channels satisfying y−k ≧ 1 other than the frequency channel CHx are determined, and the determined k frequency channels are determined by the mobile station. Channel allocation control means for allocating to one of the downlink and the uplink, and k +
One (k ≦ i−1) frequency channel is defined as a set of OFD
A radio base station apparatus including transmission / reception means for transmitting / receiving data to / from the mobile station by using the frequency channel by the multi-carrier of the M system; and the base station using the allocated frequency channel CHx of the radio zone The number of channels y (y ≧ y
1) a communication request including the information of 1), channel control means for receiving assignment of k frequency channels other than the frequency channel CHx from the base station to one of the downlink and the uplink, and one of the downlink or the uplink. Transmitting / receiving means for transmitting / receiving data to / from the base station using k + 1 (k ≦ i-1) frequency channels including the frequency channel CHx as a set of OFDM multicarrier frequency channels; And a wireless mobile station device comprising: 38. The method according to claim 3, wherein subcarriers of each frequency channel are arranged so as to be orthogonal to each other.
8. The wireless communication system according to 7. 39. One frequency channel is called OFDM (ODM).
(rthogonal Frequency Division Multiplex), which is composed of multicarriers with j subcarriers, has i frequency channels (CH1_CHi), and is composed of a base station and a plurality of mobile stations that allocate the frequency channels to each radio zone. A wireless base station device in a wireless communication system, wherein the number of channels y (y
In response to a communication request including information of ≧ 1), k frequency channels satisfying y−k ≧ 1 other than the frequency channel CHx are determined, and the determined k frequency channels are determined by the mobile station. Channel allocation control means for allocating to one of the downlink or uplink, and the frequency channel C for one of the downlink or uplink.
Transmission / reception means for transmitting / receiving data to / from the mobile station by using a set of frequency channels based on a multicarrier of the OFDM scheme with k + 1 (k ≦ i−1) frequency channels including Hx. A wireless base station device characterized by the following. 40. One frequency channel is called OFDM (ODM).
(rthogonal Frequency Division Multiplex), which is composed of multicarriers with j subcarriers, has i frequency channels (CH1_CHi), and is composed of a base station and a plurality of mobile stations that allocate the frequency channels to each radio zone. A wireless mobile station device in a wireless communication system, wherein the number of channels y (y ≧ y) that can be simultaneously communicated with the base station using the allocated frequency channel CHx of the wireless zone.
Channel control means for making a communication request including the information of 1) and receiving from the base station an allocation of k frequency channels other than the frequency channel CHx to one of the downlink and the uplink; and one of the downlink and the uplink. Above frequency channel C
Transmitting / receiving means for transmitting / receiving data to / from the base station using k + 1 (k ≦ i−1) frequency channels including Hx as a set of OFDM multi-carrier frequency channels. A wireless mobile station device characterized by the following. 41. One frequency channel is OFDM (O
(rthogonal Frequency Division Multiplex), which is composed of multicarriers with j subcarriers, has i frequency channels (CH1_CHi), and is composed of a base station and a plurality of mobile stations that allocate the frequency channels to each radio zone. A mobile communication method in a wireless communication system, wherein the mobile station uses the allocated frequency channel CHx of the radio zone to perform communication including information on the number y (y ≧ 1) of channels that can simultaneously communicate with the base station. Making a request, the base station allocates k frequency channels other than the frequency channel CHx satisfying y−k ≧ 1 to the mobile station, and then the base station and the mobile station allocate the frequency channel CHx to the mobile station. K + 1 (k ≦ i−1) frequency channels including a set of OFDM multicarriers A wireless communication method for transmitting and receiving data. 42. The subcarrier of each frequency channel is arranged so as to be orthogonal to each other.
2. The wireless communication method according to 1.