CN102892081A - Service redirection method, UE (user equipment), access network node and system - Google Patents

Abstract

The invention discloses a service redirection method, a UE, an access network node and a system. The method includes: the UE has established an RRC connection with a first access network node, or requests the first access network node to establish a connection; receiving an RRC connection redirection indication sent by the first access network node, which includes system information or system broadcast information of the target cell of the second access network node; judging that a PS connection needs to be established with the second access network node, and The target cell supports deferred reading of measurement control information; sending the first indication instead of the second indication to the second access network node, and accessing the network to which the second access network node belongs; the first indication is to carry support for deferred reading of measurement control information , and the second indication is an indication carrying stored system information or system broadcast information of the target cell. The present invention improves the ability of the second access network node to identify PS service redirection when UE initiates PS service redirection.

Description

Service redirection method, user equipment, access network node and system

technical field

The present invention relates to the field of communication technology, in particular to a service redirection method, user equipment, access network node and system.

Background technique

In a communication system, a UE (User Equipment, user equipment) can access networks of different wireless access systems through different access network nodes. For example, UE can access LTE (long term evolution, long-term evolution system) network through eNB (evolutional NodeBase, evolved base station), or access UMTS (Universal Mobile Telecommunications System, universal Mobile communication system) network, or access GERAN (GSM EDGE Radio Access Network, GSM/EDGE wireless access network) network through BSC (Base Station Controller, base station controller).

After the UE establishes an RRC (Radio Resource Control, radio resource control protocol) connection with the source access network node, or after the source access network node receives the first RRC connection establishment request sent by the UE, the source access network node can By initiating RRC connection redirection, the RRC connection between the UE and the source access network node is released, and at the same time, the UE is instructed to establish the RRC connection with the target access network node. After the UE receives the RRC message indicated by the redirection, the UE releases the RRC connection with the source access network node, performs cell reselection to the target access network node where the target cell is located, and then initiates a redirection to the target access network node. An RRC connection establishment request, to establish an RRC connection with a target access network node. In order to speed up the process of establishing an RRC connection between the UE and the target access network node, the source access network node can carry the target cell information of the target access network node in the RRC message containing the redirection indication, such as the system information or system broadcast of the target cell information. Wherein, the RRC message containing the redirection indication may be an RRC connection release connection release message or an RRC connection reject connection rejection message.

In the prior art, since the LTE network does not support CS (Circuit Switched, circuit) service calls, when the UE initiates the CS service in the LTE network, the eNB can initiate a redirection from the LTE network to the UMTS network for the UE. The specific process is as follows : After the UE receives the RRC connectionrelease message from the eNB in the LTE network, it searches and selects a suitable target cell for easy access according to the target frequency information of the UMTS network contained in it. Before accessing the target cell, the UE needs to read Take the system broadcast control channel of the target cell, and obtain the content of SIB (System Information Block, System Information Block) to understand access related information, such as SIB1, SIB3, SIB5, SIB7, SIB11, etc.

The system information or system broadcast information of the target cell is the system information broadcast in the BCCH of the target cell, and all UEs residing in the target cell can receive the system information or system broadcast information. The system information or system broadcast information carries MIB (Master Information Block, main system information block), SIB1, SIB3, SIB5 and SIB7, and optionally can also carry information such as SIB11, SIB11bis, SIB12, SIB12bis, SB1 and SB2 . Before the UE initiates RRC connection establishment in the UMTS cell, it must completely receive and save the MIB, SIB1, SIB3, SIB5, and SIB7 of the current cell, and optionally receive and save SIB11; among them, SIB11 includes the neighbor cells of the current cell List information, the UE needs to extract the neighbor cell list of the current cell of the UE from the SIB11, that is, the measurement object for the UE to perform the signal quality measurement of the neighbor cell.

In order to reduce the UE reading the system broadcast information (MIB, SIB1, SIB3, SIB5 and SIB7) of the UMTS target cell before the UMTS network initiates the RRC connection establishment request after the redirection process, in order to obtain the necessary information for accessing the target UMTS cell For the call setup delay caused by system broadcast information, the eNB can pass the RIM (RAN Information Management, radio access network information management) process and the signaling transmission of the Iu and S1 interfaces to the UMTS target before sending the RRC connection release message. The RNC to which the cell belongs requests the BCCH (Broadcast Control Channel) information of the UMTS target cell, and brings the system broadcast message of the UMTS target cell to the UE in the RRC connection release message, which carries at least MIB, SIB1, SIB3, and SIB5 and SIB7, and optionally carry SIB11, SIB11b, SIB12, SB1, and SB2, so that the UE can immediately initiate the RRC connection establishment process without reading the BCCH in the UMTS network, which can accelerate the UE's fallback to UMTS for CS Business building, get a better business feel.

Among them, after the UE falls back to the UMTS cell, it will carry the indication information element "System Information Container Stored Indication"=TRUE in the RRC connection request connection request message, that is, the storage indication of the system information container, and the RNC can judge the current service according to the indication. In order to fall back to the UMTS CS service, the UE is moved to the CELL_DCH dedicated channel state during the RRC connection establishment process. At the same time, this indication information element is also used to inform the RNC that when the UE sends the RRCconnection request message from the UMTS cell, it has obtained the system broadcast message of the UMTS cell from the LTE network. If the eNB obtains and sends the system broadcast message of the UMTS cell to the UE, the message content of the BCCH broadcast in the UMTS cell changes; or in the previous RIM process, the RNC did not send the SIB11 ( neighbor cell list information) to the eNB, then after the UE completes the RRC connection establishment in the UMTS cell, the RNC needs to send the neighbor cell list information to the UE through the DCCH (Dedicated Control Channel, Dedicated Control Channel) measurement control message as soon as possible, so that the UE The neighbor cell list of the current cell can be obtained as soon as possible to measure the signal quality of the neighbor cell.

In the process of realizing the present invention, the inventors have found that the above-mentioned prior art has at least the following disadvantages:

When the first access network node initiates redirection to the UE based on the PS (Packet Switched, packet switching) service, that is, PS only, and the UE accesses the network to which the second access network node belongs, the second access network node identifies the redirection The ability of the PS service is poor, and misjudgment may occur, and it is impossible to identify the redirected PS service.

Contents of the invention

In order to solve the problems in the prior art, various aspects of the present invention provide a service redirection method, user equipment, access network node and system.

On the one hand, a method for business redirection, including:

The user equipment (UE) has established a radio resource control (RRC) connection with the first access network node, or the UE sends an RRC connection establishment request to the first access network node;

The UE receives the RRC connection redirection indication sent by the first access network node, where the redirection indication includes system information of the target cell of the second access network node or the System broadcast information of the target cell;

The UE determines that a packet-switched (PS) domain connection needs to be established with the second access network node, and determines that the target cell of the second access network node supports deferred reading of measurement control information;

The UE sends the first indication instead of the second indication to the second access network node, and accesses the network to which the second access network node belongs;

Wherein, the first indication is an indication that supports delayed reading of measurement control information, and the second indication is an indication that carries the system information of the target cell that stores the second access network node or the second access network node Indication of the system broadcast information of the node's target cell.

On the other hand, a user equipment UE includes:

A connection module, configured to establish a radio resource control protocol (RRC) connection with the first access network node;

A receiving module, configured to receive an RRC connection from the first access network node when the connection module has established an RRC connection with the first access network node, or sends an RRC connection establishment request to the first access network node. an RRC connection redirection indication, where the redirection indication includes system information of the target cell of the second access network node or system broadcast information of the target cell of the second access network node;

A judging module, configured to judge whether it is currently necessary to establish a packet switched (PS) connection with the second access network node, and the target cell of the second access network node supports deferred reading of measurement control information;

a processing module, configured to send a first Instructing to replace the second indication to the second access network node to access the network to which the second access network node belongs;

Wherein, the first indication is an indication that supports delayed reading of measurement control information, and the second indication is an indication that carries the system information of the target cell that stores the second access network node or the second access network node Indication of the system broadcast information of the node's target cell.

In yet another aspect, a first access network node includes:

A connection module, configured to establish a radio resource control (RRC) connection with a user equipment (UE);

A sending module, configured to send an RRC connection redirection indication to the UE when the connection module has established the RRC connection of the UE or receives an RRC connection establishment request sent by the UE, and the redirection indication includes System information of the target cell of the second access network node or system broadcast information of the target cell of the second access network node.

In another aspect, a second access network node includes:

The receiving module is configured to receive a user equipment (UE) judging that it needs to establish a packet-switched (PS) domain connection with the second access network node, and judging that the target cell of the second access network node supports deferred reading A first indication sent when measuring control information, where the first indication is used to replace the second indication to request access to the network to which the second access network node belongs;

Wherein, the first indication is an indication that supports delayed reading of measurement control information, and the second indication is an indication that carries the system information of the target cell that stores the second access network node or the second access network node Indication of the system broadcast information of the node's target cell.

In yet another aspect, a service redirection system includes the UE, the first access network node, and the second access network node.

The above technical solution can improve the ability of the second access network node to identify the redirected PS service when the UE initiates the redirection of the PS service, avoiding misjudgment by the second access network node, and achieving the goal of identifying the redirected PS service. business effect.

Description of drawings

Fig. 1 is a flow chart of a method for service redirection provided by an embodiment of the present invention;

FIG. 2 is a flowchart of a method for service redirection provided by another embodiment of the present invention;

FIG. 3 is a structural diagram of a UE provided by another embodiment of the present invention;

FIG. 4 is a structural diagram of a first access network node provided by another embodiment of the present invention;

FIG. 5 is a structural diagram of a second access network node provided by another embodiment of the present invention;

Fig. 6 is a system structure diagram of service redirection provided by another embodiment of the present invention.

Detailed ways

In the following description, for purposes of illustration rather than limitation, specific details such as specific system architectures, interfaces, and techniques are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the invention may be practiced in other embodiments without these specific details. In other instances, detailed descriptions of well-known devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

The various technologies described in this article can be used in various wireless communication systems, such as current 2G, 3G communication systems and next-generation communication systems, such as Global System for Mobile Communications (GSM, Global System for Mobilecommunications), Code Division Multiple Access (CDMA, Code Division Multiple Access) system, time division multiple access (TDMA, Time Division Multiple Access) system, wideband code division multiple access (WCDMA, Wideband Code Division Multiple Access Wireless), frequency division multiple access (FDMA, Frequency Division Multiple Addressing) system, orthogonal Frequency Division Multiple Access (OFDMA, Orthogonal Frequency-Division Multiple Access) system, Single Carrier FDMA (SC-FDMA) system, General Packet Radio Service (GPRS, General Packet Radio Service) system, Long Term Evolution (LTE, Long Term Evolution) system, and other such communication systems.

Various aspects are described herein in connection with terminals and/or base stations and/or base station controllers.

The terminal may be a wireless terminal or a wired terminal. The wireless terminal may be a device that provides voice and/or data connectivity to the user, a handheld device with a wireless connection function, or other processing devices connected to a wireless modem. The wireless terminal can communicate with one or more core networks via a radio access network (for example, RAN, RadioAccess Network), and the wireless terminal can be a mobile terminal, such as a mobile phone (or called a "cellular" phone) and a mobile phone with a mobile terminal. Computers, for example, may be portable, pocket, handheld, built-in, or vehicle-mounted mobile devices that exchange voice and/or data with the radio access network. For example, Personal Communication Service (PCS, Personal Communication Service) telephone, cordless telephone, Session Initiation Protocol (SIP) telephone, Wireless Local Loop (WLL, Wireless Local Loop) station, Personal Digital Assistant (PDA, Personal Digital Assistant) and other equipment. The wireless terminal can also be called a system, a subscriber unit (Subscriber Unit), a subscriber station (Subscriber Station), a mobile station (Mobile Station), a mobile station (Mobile), a remote station (Remote Station), an access point (AccessPoint), a remote Terminal (Remote Terminal), Access Terminal (Access Terminal), User Terminal (User Terminal), User Agent (User Agent), User Device (User Device), or User Equipment (User Equipment).

A base station (eg, access point) can refer to a device in an access network that communicates with wireless terminals over the air interface through one or more sectors. The base station can be used to convert received over-the-air frames to and from IP packets, acting as a router between the wireless terminal and the rest of the access network, which can include an Internet Protocol (IP) network. The base station may also coordinate attribute management for the air interface. For example, the base station can be a base station (BTS, Base Transceiver Station) in GSM or CDMA, or a base station (NodeB) in WCDMA, or an evolved base station (NodeB or eNB or e-NodeB, evolutional NodeB) in LTE. B), the present invention is not limited.

The base station controller may be a base station controller (BSC, base station controller) in GSM or CDMA, or a radio network controller (RNC, Radio Network Controller) in WCDMA, which is not limited in the present invention.

Additionally, the terms "system" and "network" are often used herein interchangeably. The term "and/or" in this article is just an association relationship describing associated objects, which means that there can be three relationships, for example, A and/or B can mean: A exists alone, A and B exist simultaneously, and there exists alone B these three situations. In addition, the character "/" in this article generally indicates that the contextual objects are an "or" relationship.

Referring to FIG. 1 , it is a schematic flowchart of a service redirection method according to an embodiment of the present invention.

101: The UE has established an RRC connection with the first access network node, or the UE sends an RRC connection establishment request to the first access network node.

102: The UE receives the RRC connection redirection indication sent by the first access network node, where the RRC connection redirection indication includes system information of the target cell of the second access network node or information of the target cell of the second access network node System broadcast information.

For example, the UE receives an RRC connection release message (for example, RRCconnection release) or an RRC connection rejection message (for example, RRC connection reject) sent by the first access network node, and the UE obtains from the RRC connection release message or the RRC connection reject message System information of the target cell of the second access network node or system broadcast information of the target cell of the second access network node.

103: The UE determines that a PS connection needs to be established with the second access network node, and determines that the target cell supports delayed reading of measurement control information.

Among them, when the UE initiates a call, the non-access layer of the UE will give an indication to the RRC layer of the UE, telling the UE that the core network domain information of the connection to be established currently belongs to the CS or PS, so that the UE can judge that the current needs and the first The two access network nodes establish a PS connection.

The UE may determine whether the target cell supports delayed reading of measurement control information according to system information or system broadcast information of the target cell of the second access network node. For example, the UE judges whether the system information of the target cell of the second access network node or the SIB3 in the system broadcast information includes an indication information element that supports delayed reading of measurement control information, and if SIB3 includes an indication information element that supports delayed reading of measurement control information element, the UE determines that the target cell supports delayed reading of measurement control information. If the SIB3 does not include an indication information element supporting delayed reading of measurement control information, the UE determines that the target cell does not support delayed reading of measurement control information.

104: The UE sends the first indication instead of the second indication to the second access network node, and accesses the network to which the second access network node belongs. Wherein, the first indication is an indication that supports delayed reading of measurement control information, and the second indication is an indication that stores system information or system broadcast information of the target cell of the second access network node.

For example, the UE accesses the network to which the second access network node belongs by sending an RRC connection request message (RRC connection request) and an RRC connection establishment response message to the second access network node, wherein the RRC connection request message or the RRC connection establishment response The message carries an indication information element supporting deferred reading of measurement control information (for example, "Deferred measurement control reading support"), and does not carry an indication information element for a system information container storage indication (for example, "System Information Container StoredIndication").

In another embodiment of the present invention, after the UE accesses the network to which the second access network node belongs, it may further include: after the second access network node transitions the state of the UE to the CELL_DCH state, the UE receives the second access The network node obtains the neighbor cell list information of the UE through the measurement control message sent by the DCCH (Dedicated Control Channel, dedicated control channel).

In the embodiment of the present invention, the first access network node refers to the access network node of the first network, and the UE can access the first network from this node through RAT (Radio Access Technology). The second access network node refers to an access network node of the second network, from which the UE can access the second network through the RAT.

The embodiment of the present invention does not specifically limit the types of the first network and the second network, wherein the network type refers to a radio access technology (RAT) type, for example, it may be UMTS, LTE, CDMA, and the like. In addition, the types of the first network and the second network may be the same or different. For example, the first access network node is the eNB of the LTE network, and the second access network node is the RNC of the UMTS network; or the first access network node is the RNC of the UMTS network, and the second access network node is the BSC of the GERAN network ; or the first access network node is the RNC1 of the UMTS network, the second access network node is the RNC2 of the UMTS network, and so on.

In the embodiment of the present invention, the system information of the target cell or the system broadcast information of the target cell are two different names for the same information, both refer to the system information broadcast by the target cell, and all UEs located in the target cell can receive the information. System information or system broadcast information.

In the above method provided by this embodiment, when the UE initiates PS service redirection, if the system information or system broadcast information of the target cell of the second network has been obtained, and the target cell supports delayed reading of measurement control information, then by using the supported Postpone the indication of reading the measurement control information, instead of receiving the indication of the system information or system broadcast information of the target cell, access the second network, improve the ability of the second access network node to identify PS service redirection, and avoid the second Misjudgment by the access network node has achieved the effect that the second access network node recognizes that it is a redirected PS service.

Referring to FIG. 2 , it is a schematic flow diagram of a service redirection method according to another embodiment of the present invention, and it is illustrated by taking UE redirecting PS services in an LTE network to a UMTS network as an example.

201: The access network node eNB of the LTE network requests the system information of the UMTS target cell or the system broadcast information of the UMTS target cell from the access network node RNC of the UMTS network through a RIM procedure.

The eNB can determine the target cell of the UMTS network for RRC connection redirection according to the overlapping deployment information of the LTE and UMTS network pre-configured by the eNB according to the network deployment, or based on the signal quality of the UMTS network cell reported by the UE in the LTE network. The target cell may be one cell or multiple cells, which is not specifically limited in this embodiment of the present invention. For example, the eNB can determine the target cell based on the coverage, including determining the target cell according to the signal quality measurement report reported by the UE in the LTE network; or the eNB can determine the target cell based on the service, or the eNB can determine the target cell based on the moving speed of the UE; or The eNB determines the target cell based on the cell load of the 3G cell and the LTE cell, and so on.

202: After receiving the request, the access network node RNC of the UMTS network sends the system information of the UMTS target cell or the system broadcast information of the UMTS target cell to the eNB, and sets support deferral in SIB3 of the system information or system broadcast information The indication information element of reading measurement control information (for example, "Deferred measurement control reading support") indicates that the target cell supports deferred reading of measurement control information.

The system information or system broadcast information of the target cell is system information broadcast by the target cell, and all UEs located in the target cell can receive the system information or system broadcast information.

The system information or system broadcast information obtained from the UMTS access network node through the RIM procedure carries MIB, SIB1, SIB3, SIB5 and SIB7, and optionally, SIB11, SIB11b, SIB12, SB1 and SB2. Wherein, SIB11 includes measurement control information, that is, information of measurement objects for which the UE performs signal quality measurement of neighboring cells.

203: The eNB sends an RRC connection release message to the UE, initiates redirection, and carries the acquired system information or system broadcast information of the target cell in the RRC connection release message.

204: After receiving the RRC connection release message from the eNB, the UE acquires and stores the system information or system broadcast information of the UMTS target cell from the RRC connection release message.

205: The UE judges whether the system information or the SIB3 of the system broadcast information contains the above-mentioned indication information element supporting deferred reading of measurement control information (for example, "Deferred measurement control reading support"), and the UE needs to establish after being redirected to the UMTS network. The service is the PS service, that is, it needs to establish a PS connection with the RNC at present. The PS service can be a call initiated by the UE or the UE is called; if the system information or the SIB3 of the system broadcast information contains the above indication information element, Then execute 206 .

206: The SIB3 of the system information or system broadcast information contains the above-mentioned indication information element "Deferred measurement control reading support" that supports deferred reading of measurement control information, indicating that the target cell supports deferred reading of SIB11 measurement control information, and the UE sends The RNC sends an RRC connection request connection request message and an RRC connection establishment response message to access the UMTS network.

Among them, the RRC connection request message or the RRC connection establishment response message does not contain the indication information element "System Information Container StoredIndication"=TRUE of the system information container storage indication, but contains the indication information element "Deferredmeasurement control" that supports deferred reading of measurement control information reading support" and set it to TRUE. It should be noted that the embodiment of the present invention does not specifically limit whether the UE supports delayed reading of measurement control information. Regardless of whether the UE supports delayed reading of measurement control information, the support is carried in the RRC connection request message or the RRC connection establishment response message. The indication cell "Deferredmeasurement control reading support" of deferred reading measurement control information.

207: After the RNC receives the RRC connection request message and the RRC connection establishment response message from the UE, it decides to transfer the state of the UE to the CELL_FACH forward access channel according to the pre-configured strategy and according to the current PS connection between the UE and the RNC. status or CELL_DCH dedicated channel status.

Among them, the RNC can pre-configure policies according to needs. For example, in order to save dedicated channel resources and avoid wasting UMTS air interface resources, the policy can be configured as follows: when the RRC connection request message does not contain the indication information element "System Information" indicated by the system information container storage instruction Container StoredIndication=TRUE", but contains the indication information element "Deferredmeasurement control reading support=TRUE" that supports deferred reading of measurement control information, the state of the UE is migrated to the CELL_FACH state, thereby avoiding the use of dedicated channel resources for PS service data transmission, saving dedicated air interface resources. For another example, in order to reduce the access delay of the UE's PS service redirected from LTE to UMTS, the policy can be configured as follows: when the RRC connection request message does not contain the indication element "SystemInformation Container Stored Indication=TRUE", but contains When indicating the information element "Deferredmeasurement control reading support = TRUE", the state of the UE is transferred to the CELL_DCH state, so that the neighbor cell list information can be sent to the UE through the measurement control message of the DCCH, so that the UE can obtain the neighbor cell list information as soon as possible. Neighbor cell measurement shortens UE access delay.

In this embodiment, if the RNC transfers the UE to the CELL_DCH state during the RRC connection establishment phase, and the system information or system broadcast information of the target cell sent to the eNB does not carry SIB11, then further, the above method may further include 208 .

208: The RNC sends a measurement control message to the UE through the DCCH. The measurement control message contains the UE's neighbor list information. After receiving the measurement control message, the UE obtains the neighbor list information from the measurement control message, so that it can The neighbor cell list information performs signal quality measurement on the corresponding neighbor cells.

In the above method provided by this embodiment, when the UE initiates PS service redirection from LTE to UMTS, if the system information or system broadcast information of the UMTS target cell has been obtained, and the target cell supports delayed reading of measurement control information, then by using Supports delaying the reading of measurement control information instructions, instead of receiving the system information or system broadcast information instructions of the target cell, accessing the UMTS network, improving the ability of the UMTS network to identify PS service redirection, and preventing the RNC from misjudging the UE as a CSFB The call achieves the effect that the UMTS network recognizes that it is a redirected PS service. The RNC migrates the state of the UE according to different strategies, and the application is flexible. Migrating to the CELL_FACH state can save dedicated air interface resources, and migrating to the CELL_DCH state can reduce the access delay of UE redirection.

Referring to FIG. 3 , another embodiment of the present invention provides a UE, including: a connection module 301 , a receiving module 303 , a judging module 303 and a processing module 304 .

A connection module 301, configured to establish an RRC connection with a first access network node.

The receiving module 302 is configured to receive the RRC connection sent by the first access network node when the connection module 301 has established an RRC connection with the first access network node, or sends an RRC connection establishment request to the first access network node A redirection indication, where the RRC connection redirection indication includes system information of the target cell of the second access network node or system broadcast information of the target cell of the second access network node.

A judging module 303, configured to judge whether it is necessary to establish a PS connection with the second access network node, and the target cell of the second access network node supports delayed reading of measurement control information.

The processing module 304 is configured to: if the judging module 303 judges that a PS connection needs to be established with the second access network node, and the target cell of the second access network node supports delayed reading of measurement control information, then send the first indication instead of the second Two, indicate to the second access network node to access the network to which the second access network node belongs.

Wherein, the first indication is an indication that supports delayed reading of measurement control information, and the second indication is an indication that stores system information or system broadcast information of the target cell of the second access network node.

In this embodiment, the receiving module 302 may include: a receiving unit and an acquiring unit.

a receiving unit, configured to receive an RRC connection release message or an RRC connection rejection message sent by the first access network node;

The obtaining unit is configured to obtain the system information of the target cell of the second access network node or the system broadcast information of the target cell of the second access network node from the RRC connection release message or the RRC connection rejection message.

In this embodiment, the judging module 303 may be used to: judge whether the system information of the target cell of the second access network node or the SIB3 in the system broadcast information of the target cell of the second access network node includes support for deferred reading measurement control information indication information element, if the system information of the target cell of the second access network node or the SIB3 in the system broadcast information of the target cell of the second access network node includes an indication information element supporting delayed reading of measurement control information, then It is determined that the target cell supports delayed reading of measurement control information.

In this embodiment, the processing module 304 may be configured to: if the judging module 303 judges that a PS connection needs to be established with the second access network node, and the target cell of the second access network node supports delayed reading of measurement control information, then send The second access network node sends an RRC connection request message and an RRC connection establishment response message to access the network to which the second access network node belongs; wherein, the RRC connection request message or the RRC connection establishment response message carries support for deferred reading measurement The indication information element of the control information does not carry the indication information element of the storage indication of the system information container.

In this embodiment, the receiving module 302 can also be used to: receive the measurement control message sent by the second access network node through the DCCH after the second access network node migrates the state of the UE to the CELL_DCH state, and obtain the UE's Neighbor list information.

The method in any one of the above method embodiments can be implemented on the UE provided in this embodiment. For the specific implementation process, refer to the method embodiment for details, and will not be repeated here.

For the above-mentioned UE provided in this embodiment, when the UE initiates PS service redirection, if the system information or system broadcast information of the target cell of the second network has been obtained, and the target cell supports deferred reading of measurement control information, then by using the supported Postpone the indication of reading the measurement control information, instead of receiving the indication of the system information or system broadcast information of the target cell, access the second network, improve the ability of the second access network node to identify PS service redirection, and avoid the second Misjudgment by the access network node has achieved the effect that the second access network node recognizes that it is a redirected PS service. The second access network node migrates the state of the UE according to different strategies, and the application is flexible. Migrating to the CELL_FACH state can save dedicated air interface resources, and migrating to the CELL_DCH state can reduce the access delay of UE redirection.

Referring to FIG. 4, another embodiment of the present invention provides a first access network node, including:

A connection module 401, configured to establish an RRC connection with the UE;

The sending module 402 is configured to send an RRC connection redirection indication to the UE when the connection module 401 has established the RRC connection of the UE or receives the RRC connection establishment request sent by the UE, and the redirection indication includes the target of the second access network node The system information of the cell or the system broadcast information of the target cell of the second access network node.

Among them, the sending module 402 can be used for:

Sending an RRC connection release message or an RRC connection rejection message to the UE, where the RRC connection release message or the RRC connection rejection message contains the system information of the target cell of the second access network node or the system broadcast information of the target cell of the second access network node .

The first access network node in this embodiment may be the first access network node mentioned in any of the foregoing method embodiments, which will not be repeated here.

The first access network node provided in this embodiment can instruct the UE to initiate RRC connection redirection by sending an RRC connection redirection indication to the UE, and can carry the system information or system broadcast of the target cell of the second access network node information, and can be carried in the RRC connection release message, or carried in the RRC connection rejection message, which is simple, convenient and easy to implement.

Referring to FIG. 5, another embodiment of the present invention provides a second access network node, including:

The receiving module 501 is configured to receive the first indication sent by the UE when judging that a PS domain connection needs to be established with the second access network node and judging that the target cell of the second access network node supports delayed reading of measurement control information, the first instruction is used in place of the second instruction;

A connection module 502, configured to establish a connection with the UE according to the first indication;

Wherein, the first indication is an indication that supports delayed reading of measurement control information, and the second indication is an indication that carries stored system information of the target cell of the second access network node or system broadcast information of the target cell of the second access network node instructions.

Further, the second access network node may also include:

The sending module is configured to send the system information of the target cell of the second access network node or the system broadcast information of the target cell of the second access network node, and the system information or the system information block SIB3 in the system broadcast information includes the support delay Read the indication cell of the measurement control information.

In this embodiment, the receiving module 501 may be configured to: receive an RRC connection request message and an RRC connection establishment response message sent by the UE; wherein, the RRC connection request message or the RRC connection establishment response message carries an indication of supporting delayed reading of measurement control information The information element does not carry the indication information element of the storage indication of the system information container.

The second access network node in this embodiment may be the second access network node mentioned in any of the foregoing method embodiments, which will not be repeated here.

The second access network node provided in this embodiment, by receiving the first indication from the UE that carries the delayed reading of measurement control information, and establishing a PS connection with the UE according to the first indication, the PS service of the UE is implemented from the first to the second access network node. The redirection from the first access network to the second access network improves the ability of the second access network node to identify PS service redirection, avoids misjudgment by the second access network node, and achieves It is recognized that it is the effect of redirected PS traffic.

Referring to Fig. 6, another embodiment of the present invention provides a service redirection system, including the UE 601 described in any of the above embodiments, the first access network node 602 described in any of the above embodiments, and the above The second access network node 603 described in any embodiment, when the UE initiates PS service redirection, improves the ability of the second access network node to identify PS service redirection, and prevents the second access network node from The misjudgment achieves the effect that the second access network node recognizes that it is a redirected PS service.

Those skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

If the integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , including several instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disc, etc., which can store program codes. .

As mentioned above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still understand the foregoing The technical solutions recorded in each embodiment are modified, or some of the technical features are replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims (14)

1. the method that is redirected of a business is characterized in that described method comprises:

Subscriber equipment (UE) is set up Radio Resource control (RRC) with the first access network node and is connected, and perhaps described UE sends the RRC connection to described the first access network node and sets up request;

Described UE receives RRC that described the first access network node sends and connects and be redirected indication, comprises the system broadcast information of the Target cell of the system information of Target cell of the second access network node or described the second access network node in the described redirected indication;

Described UE judges and currently need to set up packet switching (PS) territory with described the second access network node and is connected, and judges that the Target cell support postponement of described the second access network node reads measuring control information;

Described UE sends the first indication and substitutes the second indication to described the second access network node, accesses the affiliated network of described the second access network node;

Wherein, described first is designated as to carry and support postpones the indication of reading measuring control information, and described second is designated as the indication of system broadcast information of the Target cell of the system information of carrying the Target cell that stores described the second access network node or described the second access network node.

2. method according to claim 1, it is characterized in that, described UE receives the redirected indication of RRC connection that described the first access network node is sent, comprise the system broadcast information of the Target cell of the system information of Target cell of the second access network node or described the second access network node in the described redirected indication, comprising:

Described UE receives RRC connection release message or the RRC connection refused message that described the first access network node is sent;

Described UE obtains the system broadcast information of the Target cell of the system information of Target cell of described the second access network node or described the second access network node from described RRC connection release message or RRC connection refused message.

3. method according to claim 1 is characterized in that, the Target cell support of described the second access network node of described judgement is postponed and read measuring control information, comprising:

Described UE judges whether the system information block SIB3 in the system broadcast information of Target cell of the system information of Target cell of described the second access network node or described the second access network node comprises and supports to postpone the indication information element that reads measuring control information;

Support to postpone the indication information element that reads measuring control information if the system information block SIB3 in the system broadcast information of the Target cell of the system information of the Target cell of described the second access network node or described the second access network node comprises, then described UE judges that described Target cell support is postponed and reads measuring control information.

4. method according to claim 1 is characterized in that, described UE sends the first indication and substitutes the second indication to described the second access network node, comprising:

Described UE sends RRC connection request message and RRC connection establishment response message to described the second access network node;

Wherein, carry in described RRC connection request message or the RRC connection establishment response message and support to postpone the indication information element that reads measuring control information, not the indication information element of carrying system information container storage indication.

5. a subscriber equipment (UE) is characterized in that, described UE comprises:

Link block is used for setting up radio resource control (RRC) with the first access network node and is connected;

Receiver module, being used for setting up RRC with the first access network node when described link block is connected, when perhaps sending RRC connection foundation request to described the first access network node, receive RRC that described the first access network node sends and connect and be redirected indication, comprise the system broadcast information of the Target cell of the system information of Target cell of the second access network node or described the second access network node in the described redirected indication;

Judge module be used for judging whether currently need to setting up packet switching (PS) with described the second access network node and being connected, and measuring control information is read in the Target cell support of described the second access network node postponement;

Processing module, if being used for described judge module judges and currently need to set up PS with described the second access network node and be connected, and the Target cell support of described the second access network node is postponed and is read measuring control information, then send the first indication and substitute the second indication to described the second access network node, access the affiliated network of described the second access network node;

Wherein, described first is designated as to carry and support postpones the indication of reading measuring control information, and described second is designated as the indication of system broadcast information of the Target cell of the system information of carrying the Target cell that stores described the second access network node or described the second access network node.

6. UE according to claim 5 is characterized in that, described receiver module comprises:

Receiving element is used for receiving RRC connection release message or the RRC connection refused message that described the first access network node is sent;

Acquiring unit is used for obtaining from described RRC connection release message or RRC connection refused message the system broadcast information of the Target cell of the system information of Target cell of described the second access network node or described the second access network node.

7. UE according to claim 5, it is characterized in that, described judge module is used for: whether the system information block SIB3 of system broadcast information that judges the Target cell of the system information of Target cell of described the second access network node or described the second access network node comprises is supported to postpone the indication information element that reads measuring control information, support to postpone the indication information element that reads measuring control information if the system information block SIB3 in the system broadcast information of the Target cell of the system information of the Target cell of described the second access network node or described the second access network node comprises, judge then that described Target cell support is postponed to read measuring control information.

8. UE according to claim 5, it is characterized in that, described processing module is used for: if described judge module is judged currently need to set up PS with described the second access network node and be connected, and the Target cell support of described the second access network node is postponed and is read measuring control information, then send RRC connection request message and RRC connection establishment response message to described the second access network node, access the affiliated network of described the second access network node;

Wherein, carry in described RRC connection request message or the RRC connection establishment response message and support to postpone the indication information element that reads measuring control information, not the indication information element of carrying system information container storage indication.

9. an access network node is characterized in that, described the first access network node comprises:

Link block is used for setting up Radio Resource control (RRC) with subscriber equipment (UE) and is connected;

Sending module, be used for when described link block has been set up the RRC connection of described UE or receive the RRC connection foundation request of described UE transmission, send RRC and connect and be redirected indication to described UE, comprise the system broadcast information of the Target cell of the system information of Target cell of the second access network node or described the second access network node in the described redirected indication.

10. the first access network node according to claim 9 is characterized in that, described sending module is used for:

Send RRC connection release message or RRC connection refused message to described UE, comprise the system broadcast information of the Target cell of the system information of Target cell of described the second access network node or described the second access network node in described RRC connection release message or the RRC connection refused message.

11. an access network node is characterized in that, described the second access network node comprises:

Receiver module, be used for receiving subscriber equipment (UE) currently need to set up packet switching (PS) territory with described the second access network node and be connected judging, and the Target cell support of judging described the second access network node is postponed when reading measuring control information, the first indication that sends, described the first indication is used for substituting the second indication;

Link block is used for connecting with described UE according to described the first indication;

Wherein, described first is designated as to carry and support postpones the indication of reading measuring control information, and described second is designated as the indication of system broadcast information of the Target cell of the system information of carrying the Target cell that stores described the second access network node or described the second access network node.

12. the second access network node according to claim 11 is characterized in that, described the second access network node also comprises:

Sending module, be used for sending the system broadcast information of the Target cell of the system information of Target cell of described the second access network node or described the second access network node, and the system information block SIB3 in described system information or the system broadcast information comprises and supports to postpone the indication information element that reads measuring control information.

13. the second access network node according to claim 11 is characterized in that, described receiver module is used for: receive RRC connection request message and RRC connection establishment response message that described UE sends;

Wherein, carry in described RRC connection request message or the RRC connection establishment response message and support to postpone the indication information element that reads measuring control information, not the indication information element of carrying system information container storage indication.

14. system that business is redirected, it is characterized in that, described system comprises such as each described user equipment (UE) of claim 5 to 8, such as claim 9 or 10 described the first access network nodes, or such as claim 11,12 or 13 described the second access network nodes.

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