WO2010034152A1 - Multi-channel wireless communication method and device with single antenna - Google Patents

Abstract

A multi-channel wireless communication method with single antenna and the corresponding device are disclosed. The states of data channels are probed according to the information collected on probe channel via the single antenna of the wireless communication device. The state of each channel is determined according to the information contained in Request to Send packet (RTS), Clear to Send packet (CTS), DATA packet and Acknowledge packet (ACK). The channel holding time is determined according to the information from each CTS packet. The availability of the data channel is determined according to whether the DATA packet is transmitted successfully last time. The data channel will be set available, if DATA packet is transmitted successfully on it last time. Loss compensation is executed on the probe channel, which is determined according to the success ratio of the RTS packet to the CTS packet. Loss compensation is also executed on the data channel for environmental adaptation.

Description

 TECHNICAL FIELD The present invention relates to the field of wireless communication technologies, and in particular, to a wireless communication method and apparatus, and in particular, to a single antenna multi-channel wireless communication method and apparatus. BACKGROUND OF THE INVENTION With the development of information technology, wireless network communication systems have become an important information transmission carrier. Some people say that the 1990s was the era of "explosive" development of wireless communication technology, and the first decade of the 21st century will be the era when wireless communication technology is more mature and widely used. With the richness of Internet resources and the development of third-generation mobile communication networks, the requirements of wireless users for communication content are constantly increasing, making the transmission capacity, transmission rate, communication quality and communication security of wireless communication systems become the hotspots in the field of wireless communication. . Although wireless communication technology has broken the shackles of "line", it is severely limited by frequency resources and transmission capacity. There are some inherent problems in wireless transmission that need to be further improved. For example, anti-interference between channels, frequency resource usage, transmission rate, and network capacity can be made higher and stronger.

 According to the literature search of the prior art, the Chinese patent publication number CN1822531 is disclosed as

2006. 08. 23, Patent name: For spatial filtering detection method for multi-antenna wireless communication system, the patent reads: "Multi-antenna transmission and multi-antenna reception in wireless communication systems can theoretically be doubled. The transmission capability of the communication system. However, at the receiving end of the multi-antenna wireless communication system, there is a spatial domain, that is, signal interference between the antennas. When using a wide-band single-carrier or wide-subband multi-carrier transmission, each carrier is wireless. The channel becomes a frequency selective channel, that is, there are different times Inter-symbol interference. Therefore, in the environment of frequency selective channel, the receiving end of the multi-antenna system has both signal interference between different antennas, signal interference at different moments, and additive white Gaussian noise. The multi-antenna wireless communication system spatial domain filtering detection method uses the baseband receiving signals on multiple antennas, first through a time-space two-dimensional matching combination. The signals of all the antennas at each moment after the combination are subjected to spatial domain filtering. Then, the interference signal remaining in the spatially filtered signal is subjected to interference cancellation, thereby obtaining an estimate of the transmitted signal. At the same time, the variance of the estimated error is calculated according to the channel parameters, the coefficients of the filter and the statistical characteristics of the interference signal, and is used to calculate the soft information of the transmitted bits. "The shortcomings are: This method has resisted the interference between the antennas to a certain extent, and also played a role in the improvement of the network capacity. However, interference between multiple antennas still exists, especially the amount of data transmission. When it is relatively large, the interference is particularly obvious, and is not completely eliminated. SUMMARY OF THE INVENTION The object of the present invention is to overcome the deficiencies in the prior art, and provide a single antenna multi-channel wireless communication method and device, such that its network throughput, The anti-interference and real-time performance are greatly improved. The present invention can be implemented by the following technical solutions, and predicts the state of the data channel by using information collected on the sounding channel, using RTS (Ready To Send), CTS ( Clear To Send, DATA (DATA), ACK (ACKnowledge character) protocol information to calculate the status of each channel, through the information in each CTS, calculate the time to occupy the channel, If there is no detected time, make an estimate and judge the availability of the last data channel according to the condition of DATA transmission. Successful use of the channel, which is available by default channel, using the communication during the last packet is sent successfully to determine the current state of the communication channel is used, a loss (Loss) compensation, loss compensation according to the RTS in the detection channel and The success rate of the CTS is calculated, and the data channel is also compensated for loss to make the environment adaptive.

 An embodiment of the present invention is further described below, and the specific steps are as follows:

 (1) arranging a plurality of wireless communication points in a physical space, each of the wireless communication points being provided with a communication device, the device having an antenna, the single antenna being selectively in accordance with a signal transmitted in the sounding channel The sounding channel is converted with the data channel to transmit data; the device can quickly convert between the sounding channel and the plurality of data channels without affecting the performance of the entire system, and the device has precise power self-control and self-adaptive capability. .

 Each wireless communication point maintains a CCA (Clear Channel Assessment) channel information table locally. The CCA channel information table is used to record the status of the channel, and is composed of the following three parameters: channel identification number, channel status, duration.

 The channel status can include the following three types: Idle (avai lable) is marked as 0, busy (busy) is marked 1, and unknown (unknown) is marked as 2.

There are two methods for obtaining the CCA channel information table: Method 1 is: setting the channel state of all data channels of the CCA channel information table to 2 (unknown), and the duration is the maximum time set by the system (maxtime), which is set in the system. During the maximum time, the antenna detects the surrounding environment on the detection channel. If the CTS is received within the maximum time set by the system, the maximum time (maxtime) and CTS time set by the system are taken as the new maximum duration, the new maximum. After the duration is completed, the respective CCA channel information table is formed; the second method is: setting the channel state of all data channels of the CCA channel information table to 2 (unknown), and the duration is the maximum time set by the system (maxtime), in the system setting During the maximum time, the antenna detects the surrounding environment on the sounding channel. If the CTS is received within the maximum time set by the system, the maximum time set by the system (maxtime) and the minimum value of the CTS time are taken as the new maximum duration. When the ACK is received within the new maximum duration, the channel status of the data channel identified in the ACK is set to 0 (ava i lable), new After the maximum duration has been transferred, a table of respective CCA channel information is formed.

 (2) When two wireless communication points have data to transmit, the originating point first checks its CCA channel information table. If there is an idle data channel, the originating point sends an RTS through its sounding channel, and the RTS contains the information to be accepted. The receiving point identification number and the data channel identification number currently available to the originating point are then compensated for loss of the RTS.

 (3) After receiving the RTS sent by the originating point, the receiving point checks the local CCA channel information table. If there is a data channel that can establish a link, arbitrarily select one of the data channels to send a CTS. If there is no channel to establish a link, The originating point and the receiving point fail to handshake, and the initiating point waits for a system to set a time and then re-initiates the handshake.

 In step (3), the CTS contains the originating point identification number of the information to be sent and the data channel identification number at which the link can be established.

 (4) After the originating point receives the CTS sent by the receiving point, the originating point establishes a link with the receiving point, the antenna turns to the data channel, the originating point starts to transmit data, and the other neighboring points receive the CTS sent by the receiving point, and then update their respective CCA channel information table, marking the channel status of the channel to be occupied by the originating point and the receiving point transmission data as 1 (busy), filling the busy according to the time value in the CTS

The duration of the (busy) state.

 The time value in the CTS refers to the time at which the data channel is occupied by the transmission data.

(5) The data is divided into multiple data packets, and the data packet is compensated for loss at the originating point, and then the data packet is transmitted from the originating point to the receiving point. After all the data is transmitted, there are two kinds of response modes. In the first method, the receiving point sends an ACK on the data channel and the sounding channel respectively, and each wireless communication point updates the respective local CCA channel information table after receiving the ACK. The second way is that the receiving point sends an ACK on the data channel, and initiates the point reception. After the ACK, the local CCA channel information table is updated, and the other wireless communication points update their respective local CCA channel information tables after the duration has been transferred. Step (5), if the last data packet transmission succeeds in the data communication process, the data channel used for the last data communication is set, that is, the state is 0 (idle), if the last data packet in the last data communication process is not If the transmission is successful, the data channel used for the last data communication is unknown, that is, the status is 2 (unknown). If the receiving point does not receive all the data packets, the unreceived data packets will be retransmitted during the next communication.

 The loss compensation means: for the sounding channel and the data channel, the system sets two parameters of probe-margin and data margin respectively, the probe margin is calculated by RNC (RTS no CTS), and the data_margin is determined by data yield. According to the statistical calculation of the probe-margin and data-margin results, the loss is compensated.

 An embodiment of the loss compensation is as follows:

 1 On the sounding channel, set an initial value probe-margin to the system and another RNC (RTS no CTS) parameter with an initial value of 0. When the originating point sends an RTS, the RNC adds one step longer, and the originating point receives one. After CTS, the RNC is reduced by one step.

 2 After the originating point has sent multiple RTSs, the RNC adopts an exponentially weighted moving average algorithm for statistical calculation.

 Exponentially Weighted Moving-Average, which has the formula: RNC=CUR— RNC* β +0LD— RNC* (1_ β ), where CUR— RNC is the current statistical RNC value, OLD— RNC For the last count of the RNC value, set for the system.

 3 At the same time, the system sets the following two parameters, good-RNC and bad-RNC. If the calculated RNC is smaller than good-RNC, the margin is reduced by one step. If the calculated RNC is greater than bad-RNC, the margin is increased by one step. .

4 The calculated probe-margin is compensated to loss, so that the power of the sounding channel is controlled, then the RNC is cleared and the statistics are re-stated. 5 In the data channel, set data-margin, good-data-yield, and bad-data-yield parameters to the system. The initial value of data-margin uses the probe-margin value of the current sounding channel, and the originating point sends multiple RTSs. After that, statistics are performed on Tx_data_cnt (number of transmitted packets) and Rx_data-cnt (number of received packets), Rx_data_ntt/Tx_data_cnt and system-set good-data-yield, Bad_data—yield for comparison, if Rx—data—cnt/ Tx—data—cnt zj, in bad—data—yield, shell! J data—margin booster—step, if Rx—data—cnt/ Tx_data—cnt is greater than good—data—yield, and data—margin is reduced by one step. When the data-margin changes, or increases, or decreases, the system will use the overhead for a short period of time to test the performance of the data-margin after the change. If the performance of the data-margin is lower than the data-margin before the change. Performance, then take the data margin before the change, otherwise, take the change after data_margir

 6 Calculate the data-margin compensation to loss, so that the power of the data channel is controlled, then Rx_data-cnt and Tx_data-cnt are cleared and re-stated.

 In step 6, there are two methods for counting Rx_data_cnt/ and Tx_data-cnt: Method 1, in the case that the ACK can be received, obtain Rx_data_cnt according to the information contained in the ACK, and then Rx_data_cnt is accumulated; Method 2, in the case that the ACK is not received, the originating point sends the RTS again, the receiving point receives the RTS and then sends the CTS, and then uses Tx_data-cnt to subtract the receiving point. The number of packets, you can get the Rx_data-cnt of the last receiving point, and then accumulate the Rx_data-cnt.

 In step 6, the CTS contains the data packets needed by the receiving point.

The working principle of the invention is: wireless communication between points, each communication point has a communication device, the device has an antenna, and the single antenna is selectively in the detection according to a signal transmitted in the detection channel. Channel and the data channel are converted to transmit data; the device can The device can be quickly converted between the probing channel and multiple data channels without affecting the performance of the entire system. The device has precise power self-control and self-adaptive capabilities.

 Multiple channels are used for data transmission using one antenna. Each wireless communication point maintains a CCA channel information table locally. The CCA channel information table is composed of three parameters: channel identification number, channel status, duration.

 The three parameters are shown in the following table:

 The channel status includes the following three types: Idle (avai lable) is marked as 0, busy (busy) is marked as 1, and unknown (unknown) is marked as 2.

 In step (2), the originating point is sent to the RTS of the receiving point through the sounding channel, using CSMA/CA

(Carrier Sense Multiple Access/Collision Detection Method) avoids collisions between multiple RTSs in the sounding channel. After passing through a SIFS (short interface space) and a random slot time, the originating point CCA channel information table is detected, and if there is an idle data channel, the RTS is transmitted. If there is no idle channel in the CCA channel information table of the initiating point, a SIFS and a random slottime are assigned, and if an ACK is received during this gap time, the CCA channel information table is updated, and a SIFS and a random slottime are re-assigned, and the gap time is added. After the transfer, send the RTS; if no ACK is received, after the gap time is over, assign a SIFS and a random slottime. Repeat the above process. If no ACK is received within the timeout, the CCA channel information table is updated, and the channel state of all data channels is set to 0 (available), and RTS is sent after a SIFS and a random slottime. In step (3), the receiving point parses the RTS, and detects the local CCA channel information table, performs a corresponding action, or fails the handshake, or issues a CTS. In step (4), after the receiving point receives the CTS, the handshake is successful, the antenna is transferred to the data channel, and data transmission begins. The channel conversion time is short to ensure system performance. For other neighboring points, the respective local CCA channel information table is updated, and the channel status of the channel to be occupied by the originating point and the receiving point transmission data is marked as 1 (busy). The duration of the busy state is filled according to the time value in the CTS. In step (5), the data is divided into multiple data packets, and the data packet is compensated for loss at the originating point, and then the data packet is transmitted from the originating point to the receiving point. After all the data is transmitted, there are two The first way is that the receiving point sends an ACK on the data channel and the sounding channel respectively, and each wireless communication point updates the respective local CCA channel information table after receiving the ACK. The second way is that the receiving point sends an ACK on the data channel. After the initiating point receives the ACK, the local CCA channel information table is updated, and the other wireless communication points update their respective local CCA channel information tables after the duration is completed.

The invention has the following advantages: 1. Communication through one antenna, mutual interference between the two antennas is well avoided, and anti-interference is strong; 2. Multiple data channels are used, which greatly improves the network capacity of the wireless network. 3, using the loss compensation method, can avoid the impact of adverse factors such as the specific environment and equipment performance, for multi-channel communication, you can adjust the transmission power, transmission rate and pulse size in real time, so that the system is environment-oriented Adaptive; 4, low price, easy maintenance, long service life; 5, simple method, easy to implement, a wide range of applications. DRAWINGS 1 is a schematic diagram of a communication process of an ACK response mode 1 of the present invention;

 FIG. 2 is a schematic diagram of a communication process of the ACK response mode 2 of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

 As described above, the present invention can be implemented by the following technical solutions, by predicting the state of the data channel by the information collected on the sounding channel, using RTS (Ready To Send), CTS (Clear To Send), DATA ( Data), ACK (ACKnowledge character) protocol information to calculate the state of each channel, through the information in each CTS, calculate the time to be occupied by the channel, for a time that is not detected, make a pre- Estimate, according to

In the case of DATA transmission, the availability of the last data channel is judged. For the last successfully used channel, it is defaulted to the available channel, and the last packet in the communication process is successfully transmitted to determine the current state of the channel used for communication. The channel is compensated for loss. The loss compensation is calculated according to the success rate of RTS and CTS. The data channel is also compensated for loss to make the environment adaptive.

 As shown in FIG. 1 and FIG. 2, the specific steps of an embodiment of the present invention are as follows:

 (1) setting four wireless communication points in a physical space, and providing a communication device at each wireless communication point, the device having an antenna, the single antenna being selectively in accordance with a signal transmitted in the sounding channel The sounding channel is converted with the data channel to transmit data; the device can quickly convert between the sounding channel and the plurality of data channels without affecting the performance of the entire system, and the device has precise power self-control and self-adaptive capability. .

 The above four wireless communication points are assumed to be A point, B point, C point, and D point, respectively. Each point maintains a local CCA channel information table, which is used to record the status of the channel.

The CCA channel information table is used to record the state of the channel and consists of the following three parameters: Marking number, channel status, duration.

 The channel status includes the following three types: Idle (avai lable) is marked as 0, busy (busy) is marked as 1, and unknown (unknown) is marked as 2.

 The method for obtaining the CCA channel information table information is to set the state of all data channels of the CCA table to 2 (unknown), and the duration is the maximum time (maxtime) set by the system. During the maximum time set by the system, the antenna detects the surrounding environment on the probing channel. If the CTS is received within the maximum time set by the system, the maximum time set by the system (maxtime) and the maximum value of the CTS time are taken as the new maximum duration. After the new maximum duration is completed, the respective CCA channel information table is formed. .

 (2) When there is data at point A to be sent to point B, point A first checks its CCA channel information table. If there is an idle data channel, it sends an RTS through its sounding channel, and the RTS contains B that needs to receive information. The point identification number and the data channel identification number currently available at point A are then compensated for loss of the RTS.

 (3) After receiving the RTS sent from point A, point B checks the local CCA channel information table. If there is no channel to establish the link, point A and point B fail to handshake, point A waits for a system to set the time and then re-initiates the handshake. . If there is a channel to establish a link, send a CTS. The CTS contains the A-point identification number for which information needs to be sent and the data channel identification number at which the link can be established.

 (4) After receiving the CTS sent by point B, points C and D update their respective CCA channel information tables, and the channel to be occupied by A and B transmission data is marked as 1 (busy). After point A receives the CTS sent by point B, point A establishes a link with point B, the antenna goes to the data channel, and point A starts to transmit data.

(5) The data is divided into multiple data packets, and the data packet is compensated for loss at the originating point, and then the data packet is transmitted from the originating point to the receiving point. After all the data is transmitted, there are two types. In the first mode, the receiving point sends an ACK on the data channel and the sounding channel respectively. After receiving the ACK, each wireless communication point updates the local CCA channel information table. The second way is that the receiving point sends an ACK on the data channel. After receiving the ACK, the originating point updates the local CCA channel information table, and the other wireless communication points update their respective local CCA channel information tables after the duration is over.

 In step (5), if the last data packet transmission succeeds in the data communication process, the data channel used for the last data communication is set, that is, the state is 0 (available), if the last data packet is not transmitted during the data communication process. If successful, the data channel used for the last data communication is unknown, that is, the status is 2 (unknown). If the receiving point does not receive all the data packets, the unreceived data packets will be retransmitted during the next communication.

 Loss compensation means: For the probe channel and data channel, the system sets the probe-margin and data-margin parameters respectively. The probe-margin is calculated by RNC (RTS no CTS), and the data-margin is determined by data yield. The loss (loss) is compensated based on the result of the probe-margin and data-margin calculated by the statistics.

 The specific steps of loss compensation are as follows:

 1 On the sounding channel, set an initial value probe-margin to the system and another RNC (RTS no CTS) parameter with an initial value of 0. When the originating point sends an RTS, the RNC adds one step longer, and the originating point receives one. After CTS, the RNC is reduced by one step.

 2 After the originating point has sent multiple RTSs, the RNC adopts an exponentially weighted moving average algorithm for statistical calculation.

Exponentially Weighted Moving-Average, which has the formula: RNC=CUR_RNC* β +0LD— RNC* (1_ ), where CUR— RNC is the current statistical RNC value, OLD— RNC is the last statistical RNC The value of β is the system setting. 3 At the same time, the system sets the following two parameters, good-RNC and bad-RNC. If the calculated RNC is smaller than good-RNC, the margin is reduced by one step. If the calculated RNC is greater than bad-RNC, the margin is increased by one step. .

 4 The calculated probe-margin is compensated to loss, so that the power of the sounding channel is controlled, and then the RNC is cleared and the statistics are re-stated.

5 In the data channel, set the data-margin, good-data-yield and bad-data-yield parameters to the system. The initial value of data-margin uses the probe-margin value of the current sounding channel. After the originating point has sent multiple RTSs. , for Tx—data—cnt (number of transmitted packets) and Rx—data—cnt (number of received packets), Rx—data— cnt/ Tx—data—cnt and system-set good-data—yield, bad — data—yield for comparison, if Rx data cnt/ Tx—data— cnt is less than bad—data—yield, J! J data—margin booster—step, if Rx—data— cnt/ Tx—data— cnt Greater than good—data—yield, data—margin is reduced by one step. When the data-margin changes, or increases, or decreases, the system will use the overhead for a short period of time to test the performance of the data-margin after the change. If the performance of the data-margin is lower than the data-margin before the change. Performance, then take the data margin before the change, otherwise, take the change after data_margin ₀

 6 Calculate the data-margin compensation to loss, so that the power of the data channel is controlled, then Rx_data-cnt and Tx_data-cnt are cleared and re-stated.

Step 6, in the statistics of Rx_data_cnt/ and Tx_data-cnt, there are two methods: Method 1, in the case that the ACK can be received, according to the information contained in the ACK, Rx_data_cnt is obtained. Then, Rx_data_cnt is accumulated; Method 2, when the ACK is not received, the originating point sends the RTS again, the receiving point receives the RTS and then sends the CTS, and then uses Tx_data-cnt to subtract the receiving point. The number of packets required, you can get the last receiving point Rx—data—cnt, and then accumulate Rx—data—cnt.

 In step 6, the CTS contains the data packets needed by the receiving point.

 Embodiment 2

 As shown in FIG. 1 and FIG. 2, the specific steps of an embodiment of the present invention are as follows:

 (1) setting four wireless communication points in a physical space, and providing a communication device at each wireless communication point, the device having an antenna, and the single antenna is selectively selected according to a signal transmitted in the sounding channel The detection channel is converted with the data channel to transmit data; the device can quickly convert between the sounding channel and the plurality of data channels without affecting the performance of the entire system, and the device has precise power self-control, adaptive ability.

 The above four wireless communication points are assumed to be A point, B point, C point, and D point, respectively. Each point maintains a local CCA channel information table, which is used to record the status of the channel.

 The CCA channel information table is used to record the status of the channel and consists of the following three parameters: channel identification number, channel status, duration.

 The channel status includes the following three types: Idle (avai lable) is marked as 0, busy (busy) is marked as 1, and unknown (unknown) is marked as 2.

 The CCA channel information table is obtained by: setting the channel state of all the data channels of the CCA channel information table to 2 (unknown), and the duration is the maximum time set by the system (maxtime), and the antenna is set at the maximum time set by the system. In the detection channel detection surrounding environment, if the CTS is received within the maximum time set by the system, the maximum time set by the system (maxtime) and the minimum value of the CTS time are taken as the new maximum duration, if the new maximum duration is within the new maximum duration. Upon receiving the ACK, the channel state of the data channel identified in the ACK is set to 0 (avai lable), and after the new maximum duration is completed, a respective CCA channel information table is formed.

(2) When there is data at point A to be sent to point B, point A first checks its CCA channel information table. If there is an idle data channel, an RTS is sent through its sounding channel. The RTS contains the B-point identification number of the information to be accepted and the data channel identification number currently available at point A, and then compensates for the loss of the RTS. .

 (3) After receiving the RTS sent from point A, point B checks the local CCA channel information table. If there is no channel to establish the link, point A and point B fail to handshake, point A waits for a system set time and then re-initiates. Handshake, if there is a channel to establish a link, send a CTS. The CTS contains the A-point identification number for which information needs to be sent and the data channel identification number at which the link can be established.

 (4) After receiving the CTS sent by point B, points C and D update their respective CCA channel information tables, and the channel to be occupied by A and B transmission data is marked as 1 (busy). After point A receives the CTS sent by point B, point A establishes a link with point B, the antenna goes to the data channel, and point A starts to transmit data.

 (5) The data is divided into multiple data packets, and the data packet is compensated for loss at the originating point, and then the data packet is transmitted from the originating point to the receiving point. After all the data is transmitted, there are two kinds of response modes. In the first method, the receiving point sends an ACK on the data channel and the sounding channel respectively, and each wireless communication point updates the respective local CCA channel information table after receiving the ACK. The second way is that the receiving point sends an ACK on the data channel, and initiates the point reception. After the ACK, the local CCA channel information table is updated, and the other wireless communication points update their respective local CCA channel information tables after the duration is over.

Step (5), if the last data packet is successfully transmitted during the data communication process, the data channel used for the last data communication is set, that is, the state is 0 (available), and if the last data communication process, the last data packet is not transmitted. If successful, the data channel used for the last data communication is unknown, that is, the status is 2 (unknown). If the receiving point does not receive all the data packets, the unreceived data packets will be retransmitted during the next communication. The loss compensation refers to: For the sounding channel and the data channel, the system sets two parameters of probe-margin and data margin respectively, the probe margin is calculated by RNC (RTS no CTS), and the data-margin is determined by data yield. According to the statistical calculation of the probe-margin and data-margin results, the loss is compensated.

 The specific steps of one of the embodiments of loss compensation are as follows:

 1 On the sounding channel, set an initial value probe-margin to the system and another RNC (RTS no CTS) parameter with an initial value of 0. When the originating point sends an RTS, the RNC adds one step longer, and the originating point receives one. After CTS, the RNC is reduced by one step.

 2 After the originating point has sent multiple RTSs, the RNC adopts an exponentially weighted moving average algorithm for statistical calculation.

 Exponentially Weighted Moving-Average, the formula is: RNC=CUR— RNC* β +0LD— RNC* (1_ ), where CUR— RNC is the current statistical RNC value, OLD— RNC is The last time the value of RNC is counted, β is the system setting.

 3 At the same time, the system sets the following two parameters, good-RNC and bad-RNC. If the calculated RNC is smaller than good-RNC, the margin is reduced by one step. If the calculated RNC is greater than bad-RNC, the margin is increased by one step. .

 4 The calculated probe-margin is compensated to loss, so that the power of the sounding channel is controlled, and then the RNC is cleared and the statistics are re-stated.

5 In the data channel, set the data-margin, good-data-yield and bad-data-yield parameters to the system. The initial value of data-margin uses the probe-margin value of the current sounding channel. After the originating point has sent multiple RTSs. , for Tx—data—cnt (number of transmitted packets) and Rx—data—cnt (number of received packets), Rx—data— cnt/ Tx—data—cnt and system-set good-data—yield, bad — data— yield is compared, if Rx_data— cnt/ Tx—data—cnt is less than bad—data—yield, then data—margin booster ^ - step, if Rx—data— cnt/ Tx—data—cnt is greater than good—data—yield Data—margin is reduced by one step. When the data-margin changes, or increases, or decreases, the system will use the overhead for a short period of time to test the performance of the data-margin after the change. If the performance of the data-margin is lower than the data-margin before the change. Performance, then take the data margin before the change, otherwise, take the change after data_margir

 6 Calculate the data-margin compensation to loss, so that the power of the data channel is controlled, then Rx_data-cnt and Tx_data-cnt are cleared and re-stated.

 Step 6 has the following two methods for counting Rx_data_cnt/ and Tx_data-cnt: Method 1, in the case that the ACK can be received, obtain Rx_data_cnt according to the information contained in the ACK, and then Rx—data—cnt accumulates; Method 2: In the case that the ACK is not received, the initiating point sends the RTS again, the receiving point receives the RTS and then sends the CTS, and then uses Tx_data—cnt to subtract the receiving point. The number of packets, you can get the Rx_data-cnt of the last receiving point, and then accumulate the Rx_data-cnt.

 In step 6, the CTS contains the data packets needed by the receiving point.

Claims

Claim A method of wirelessly communicating with a single antenna, the method comprising:  In the single antenna, a plurality of communication channels are provided, the plurality of communication channels including a sounding channel and a data channel; and selectively converting the sounding channel and the data channel according to a signal transmitted in the sounding channel To transfer data.  2. The method of claim 1 further comprising recording a channel state of each of the plurality of communication channels in a channel state table to facilitate transmission of the data.  3. The method of claim 2, further comprising maintaining the channel state table locally. 4. The method of claim 2, wherein the channel state table includes a channel identification number parameter and a channel state parameter.  5. The method of claim 1, wherein the signal is a Ready To Send or RTS signal to request transmission of the data.  6. The method of claim 5, wherein the request to send signal comprises a channel state of the data channel that is usable.  7. The method of claim 1, wherein the signal is a Clear To Send or CTS signal to indicate that the data channel is capable of establishing a link among the plurality of channels.  8. The method of claim 7, wherein the allowed transmit signal comprises a channel state of the data channel on which the link can be established.  9. The method of claim 1, wherein the signal is an ACKnowledge character or ACK signal to indicate that the data transmission is complete. 10. The method of claim 9, wherein the acknowledgment character signal is identifiable on the data channel and the sounding channel, or only from the data channel. 11. The method of claim 2, further comprising updating the channel state table.  12. The method of claim 2, wherein the channel state in the channel state table is preset to an unknown state.  13. The method of claim 4, wherein the channel signal table further comprises a duration.  14. The method according to claim 13, wherein the duration is preset to a maximum time, and if a Clear To Send signal is received within the maximum time, the maximum time and the permission are allowed. A maximum or a minimum of a time at which the signal is transmitted as a new maximum duration.  15. The method of claim 9 wherein if the acknowledgment character signal is received within a new maximum duration, then a channel state of the data channel transmitting the data is set to an idle state.  16. The method of claim 2, further comprising dividing the data into a plurality of data packets, and if a final data packet is successfully transmitted, setting the channel state of the data channel transmitting the final data packet to an idle state. Status, if the final data packet is not successfully transmitted, the channel state of the data channel transmitting the final data packet is set to an unknown state.  17. The method of claim 1 wherein transmitting the signal is using a carrier sense multiple access/collision detection method (CSMA/CA) to avoid collisions of multiple request transmitted signals in the sounding channel.  18. The method of claim 2, if the channel state of none of the data channels in the channel state table is an idle state, waiting for a period of time until an acknowledgement character signal is received. 19. The method of claim 18, wherein the period of time comprises a Short Interface Space (SIFS) and a random slot time. 20. The method of claim 2, further comprising detecting the channel state table.  21. The method of claim 7 further comprising setting the channel state to a busy state based on a time value within the allowed transmit signal when the data is transmitted between the links.  22. A method of compensating for a signal loss in wireless communication, the method comprising: setting a request transmission signal value (RNC or RTS no CTS) that does not receive an allowed transmission signal;  Comparing the request transmission signal value that does not receive the allowed transmission signal and a good value (good-RNC) and a bad value (bad-RNC) to obtain a probe-margin; and detecting the difference value Compensation is applied to the signal loss.  23. The method according to claim 22, wherein if the request transmission signal value that does not receive the transmission enable signal is less than the good value, the probe-margin is reduced by one unit, if the signal is not received If the value of the request transmission signal that allows the transmission of the signal is greater than the inferior value, the detection difference value is increased by one unit.  24. The method of claim 22, wherein the request signal value that is not received to allow transmission of the signal is obtained by an exponentially weighted moving average algorithm.  25. The method according to claim 24, wherein a formula of the algorithm is RNC=CUR_RNC*β +0LD− RNC* (1_β), and CUR− RNC is the request to send signal value that does not receive the allowed transmission signal. A current value, β is a set value of the wireless device, and OLD_RNC is an old value of the request transmission signal value for which the transmission enable signal is not received.  26. The method of claim 22, further comprising clearing the value of the request signal that did not receive the allowed transmit signal to recalculate.  27. The method of claim 22, further comprising setting an initial value for the value of the request signal for which the transmit enable signal is not received. 28. The method of claim 27, wherein the request to transmit a signal is not received This initial value of the signal value is zero.  29. The method of claim 22, further comprising transmitting a plurality of request transmission signals. 30. A method of compensating for a data loss in wireless communication, the method comprising:  Set a good data output (good-data-yield) and a bad data yield (bad dada yield);  Counting the number of transmitted packets (Tx_data_cnt) and the number of received packets (Rx data cnt);  Comparing the ratio of the number of received data packets to the number of transmitted data packets and the good data output value and the inferior data output value to obtain a data-margin; the system uses a short period of time Time, to test the performance of the data-margin after the change, if the performance of the data-margin after the change is lower than the performance of the data-margin before the change, the data-margin is still taken before the change, otherwise, the change is taken. After the data_margin, and the data difference value is compensated to the data loss, each message has a different compensation value for each communication object.  31. The method according to claim 30, wherein if the ratio is less than the inferior data output value, the data difference value is increased by one unit, and if the ratio is greater than the good data output value, the data difference is The value is reduced by one unit.  32. The method according to claim 30, after obtaining a data-margin, a system uses a short period of time to test a performance of the data-margin after the change, and if the data is changed- The performance of the margin is lower than the performance of the data-margin before the change, and the data-margin is still taken before the change, otherwise, the changed data-margin is taken.  33. The method of claim 30, wherein an initial value of the data difference value is the current value of the request to transmit signal value of the request 25 that does not receive the transmit enable signal. 34. The method of claim 30, further comprising the number of transmitted packets and the receiving The number of packets is cleared to recalculate.  35. The method of claim 30, wherein the number of received packets is obtainable based on information contained in an ACKnowl edge character or ACK signal.  36. The method according to claim 30, wherein the number of received data packets is based on a Clear To Send or CTS signal and the number of packets transmitted by the data.  37. The method of claim 30, further comprising transmitting a plurality of request transmission signals. 38. A wireless communication device, the device comprising:  a single antenna having a plurality of communication channels, the plurality of communication channels including a sounding channel and a data channel, wherein the single antenna is selectively in the sounding channel and the data according to a signal transmitted in the sounding channel The channel is converted to transmit data.  39. The apparatus of claim 38, which can quickly transition between the sounding channel and the plurality of data channels without affecting overall system performance.  40. Apparatus according to claim 38 having precise power self-control and self-adapting capabilities.  41. The apparatus of claim 38, further comprising a channel state table that records a channel state of each of the plurality of communication channels to facilitate transmission of the data.  42. The apparatus of claim 41, wherein the channel state table is maintained locally. 43. The apparatus of claim 41, wherein the channel state table comprises a channel indicator number parameter and a channel state parameter.  44. The apparatus of claim 38, wherein the signal is a Ready To Send or RTS signal to request transmission of the data. 45. The apparatus of claim 44, wherein the request to transmit signal comprises a channel state of the data channel that is usable. 46. The apparatus of claim 38, wherein the signal is a Clear To Send or CTS signal to indicate that the data channel is capable of establishing a link among the plurality of channels.  47. The apparatus of claim 46, wherein the allowed transmit signal comprises a channel state of the data channel on which the link can be established.  48. The apparatus of claim 38, wherein the signal is an ACKnowledge character or ACK signal to indicate that the data transmission is complete.  49. Apparatus according to claim 48, wherein the acknowledgment character signal is identifiable on the data channel and the sounding channel, or only from the data channel.  50. The apparatus of claim 41, wherein the channel state table is updateable. 51. The apparatus of claim 41, wherein the channel state in the channel state table is preset to an unknown state.  52. The apparatus of claim 43, wherein the channel signal table further comprises a duration.  53. The apparatus according to claim 52, wherein the duration is preset to a maximum time, and if a Clear To Send signal is received within the maximum time, the maximum time and the permission A maximum or a minimum of a time at which the signal is transmitted as a new maximum duration.  54. The apparatus of claim 49, if the acknowledged character signal is received within a new maximum duration, setting a channel state of the data channel transmitting the data to an idle state. 55. The apparatus according to claim 41, wherein the data is split into a plurality of data packets, and if a final data packet is successfully transmitted, the channel state of the data channel that transmits the final data packet is set to one. In the idle state, if the final data packet is not successfully transmitted, the channel state of the data channel that transmits the final data packet is set to an unknown state. 56. The apparatus of claim 38, wherein transmitting the signal is using a carrier sense multiple access/collision detection method (CSMA/CA) to avoid collisions of multiple request transmission signals occurring in the sounding channel.  57. The apparatus according to claim 41, if the channel state of a data channel in the channel state table is an idle state, waiting for a period of time until a confirmation character signal is received.  58. The apparatus of claim 57, wherein the period of time comprises a Short Interface Space (SIFS) and a random slot time.  59. The apparatus of claim 41, wherein the channel state table is detectable. 60. The apparatus of claim 46, wherein when the data is transmitted between the links, the channel state is set to a busy state based on a time value within the allowed transmit signal.  61. Apparatus according to claim 38 which is operative to compensate for the signal loss using the method of claim 22.  62. Apparatus according to claim 38 which is operative to compensate for the data loss using the method of claim 30.  63. The method of claims 30 and 22, the two methods being interchangeable, without the limitations of the sounding channel and the data channel.