WO2012152130A1

WO2012152130A1 - Bearer processing method and device

Info

Publication number: WO2012152130A1
Application number: PCT/CN2012/072740
Authority: WO
Inventors: 和峰
Original assignee: 中兴通讯股份有限公司
Priority date: 2011-07-21
Filing date: 2012-03-21
Publication date: 2012-11-15
Also published as: CN102892210A; CN102892210B

Abstract

The present invention provides a bearer processing method and device. The method comprises the following steps: a serving network of a terminal initiating a request to a target network with another standard, the request being used to transfer a data service borne on a part or all of connection bearers of the terminal in the serving network to the target network; after receiving a connection bearer establishment success response message sent by the target network, the serving network releasing the connection bearers transferred successfully. Through the present invention, the terminal is dynamically adjusted among multiple networks.

Description

The present invention relates to the field of communications, and in particular to a bearer processing method and apparatus. BACKGROUND OF THE INVENTION With the expansion of data traffic, the demand for transmission rate and traffic of end users has made existing 2G and 3G network resources increasingly scarce, and the user experience has also deteriorated. How to improve the user experience is an urgent task that operators must consider. On the other hand, in order to provide higher service rates, the market is expecting more and more to deploy Long Term Evolution (LTE) networks. However, due to the fact that the actual network network cannot be replaced by commercial networks, in the future, new technologies such as LTE will not reach full coverage in the future, and the old 2G and 3G network coverage has not been completely replaced before, in the same area. There will be scenes where multiple networks of the system are simultaneously covered. Because of the limitations of terminal capabilities and service requirements, operators hope to achieve a smooth transition between multiple networks. At least in the next 5 to 10 years, 2G and 3G networks will continue to provide some business services. In the existing scenario of coexistence of multiple networks, the load between multiple networks may be unbalanced, which is mainly related to the types of terminals and the types of services of users under network coverage. For example, the domestic 2G network is congested due to the introduction of the General Packet Radio Service (GPRS) service, and the 3G network has not been fully utilized due to factors such as the number of users, and the load is low. For emerging LTE networks, there are fewer users. On the one hand, this imbalance will lead to a decline in the user experience. On the other hand, the congested network also brings operational pressure to the operators. At the same time, other network resources cannot be fully utilized, which also leads to waste of network resources and increases the operator's Capital Expenditure (CAPEX). One of the implementation methods is to allow the current multi-mode mobile phone to access multiple networks for data transmission at the same time. In this way, the absolute data throughput rate of the terminal can be improved, the user experience can be improved, the market appeal to the end customer can be increased, and the current network resources can be fully utilized to reduce the operating cost of the operator. The existing methods cannot solve the dynamic adjustment between multiple networks. As a result, the terminal in the multi-network connection state cannot fully utilize the existing network resources, and cannot effectively increase the transmission rate of the terminal, and also wastes network resources. SUMMARY OF THE INVENTION A primary object of the present invention is to provide a bearer processing method and apparatus to solve at least the above problems. According to an aspect of the present invention, a bearer processing method is provided, including the following steps: a service network of a terminal initiates a request to a target network of another system, where the request is used to use the terminal in the service network. The data service carried on the part or all of the connection bearer is migrated to the target network; after receiving the response message sent by the target network and successfully establishing the connection bearer, the service network releases the successfully connected connection bearer. Initiating the request by the service network to the target network includes: the core network element of the service network initiating the request to the target network; or the radio access network element of the service network triggering the The core network element of the serving network initiates the request. The radio access network element of the service network triggers the core network element of the service network to initiate the request, including: the serving network radio access network element sends a trigger message to a core network element of the serving network The trigger message carries at least one of the following: the identifier information of the terminal, the information about the migrated connection bearer, and the identifier information of the target side network element. Before the target network establishes a new bearer of the terminal, if the terminal does not establish a connection with the target network, the target network instructs the terminal to establish a radio resource control RRC connection through a paging process, or And the service network indicates, by signaling, that the terminal establishes the RRC connection in the target network. The service network instructing the terminal to establish the RRC connection includes: after receiving the information sent by the target network to indicate that the terminal is idle, the service network instructs the terminal to establish the RRC by using an indication message A connection, where the indication message carries the identification information of the target network. The request carries at least one of the following: the identifier information of the terminal, the information about the migrated connection bearer, and the identifier information of the target network element. The information about the migrated connection bearer includes at least one of the following: the identifier information of the migrated connection bearer, the quality of service of the migrated connection bearer, and the user plane address information of the migrated connection bearer. According to another aspect of the present invention, a bearer processing method is provided, including the following steps: The target network receives a request initiated by a service network of a terminal service of another system, where the request is used to connect the terminal And the data service carried on the part or all of the connection bearers in the service network is migrated to the target network; the target network establishes a connection bearer, and after the connection bearer is successfully established, the service network is sent to the service network. The message is sent by the connection that is successfully established, and the message is used to indicate that the service network releases the connection bearer that is successfully migrated. Before the target network receives the request initiated by the service network, the method further includes: the core network element of the service network initiating the request to the target network; or the wireless access of the service network The network element triggers the core network element of the serving network to initiate the request. The message that the target network element sends the successfully established connection bearer to the service network includes the identifier information of the bearer that the service network requests to migrate. According to still another aspect of the present invention, a bearer processing device is provided, which is located in a service network of a terminal, and includes: a first sending module, configured to initiate a request to a target network of another system, where the request is used for Transmitting, to the target network, the data service carried by the terminal on the part or all of the connection bearers in the service network; the release module is configured to receive the response message sent by the target network to successfully establish a connection bearer, Release the connection bearer that was successfully migrated. According to still another aspect of the present invention, a bearer processing device is provided, which is located in a target network, and includes: a receiving module, configured to receive a request initiated by a service network for a terminal service of another system, where the request is And the data service carried on the part or all of the connection bearers in the service network is migrated to the target network; the establishing module is configured to establish a connection bearer; and the second sending module is configured to be in the connection After the bearer is successfully established, the message of the connection bearer that is successfully established is sent to the service network, where the message is used to indicate that the service network releases the connection bearer that is successfully migrated. According to the embodiment of the present invention, the service network of the terminal is used to initiate a request to the target network of another system, where the request is used to migrate the data service carried by the terminal to some or all of the connected bearers in the service network to After the response network message of the successfully established connection bearer sent by the target network is received, the service network releases the successfully connected connection bearer, and solves the problem that the terminal cannot dynamically adjust between multiple networks, thereby achieving The effect of the terminal dynamically adjusting between multiple networks. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are set to illustrate,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, In the drawings: FIG. 1 is a flowchart of a bearer processing method according to an embodiment of the present invention; FIG. 2 is a flowchart of a bearer processing method according to an embodiment of the present invention; 3 is a structural block diagram of a bearer processing apparatus according to an embodiment of the present invention; FIG. 4 is a structural block diagram of a bearer processing apparatus according to an embodiment of the present invention; FIG. 5 is a network architecture diagram of multi-network access according to an embodiment of the present invention; 6 is a schematic diagram of a connection migration method according to an embodiment of the present invention; FIG. 7 is a flowchart of a bearer processing method according to a preferred embodiment of the present invention; FIG. 8 is a flowchart of a bearer processing method according to a preferred embodiment 2 of the present invention; 9 is a flowchart of a bearer processing method according to a preferred embodiment 3 of the present invention; and FIG. 10 is a flowchart of a bearer processing method according to a preferred embodiment 4 of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. Due to changes in the wireless environment and changes in network load, it is necessary to ensure that terminals in the multi-network connection state can dynamically adapt to obtain higher service quality. This requires the network side to dynamically adjust the service connection of the terminal between multiple networks according to the environment in which the terminal is located. In this embodiment, a bearer processing method is provided. FIG. 1 is a flowchart of a bearer processing method according to an embodiment of the present invention. As shown in FIG. 1, the method includes the following steps: Step S102: The service network of the terminal is sent to other The destination network initiates the request, where the request is used to migrate the data service carried by the terminal on part or all of the connection bearers in the service network to the target network; Step S104, the service network receives the successful establishment of the target network transmission. After the response message of the bearer is connected, the connection bearer that successfully migrated is released. After the above-mentioned steps are received, the connection bearer is successfully established after the target network successfully establishes the connection bearer according to the migration request sent by the service network to the target network. It realizes that the service network migrates bearers to other standard networks under certain circumstances (for example, under heavy load), realizes dynamic adjustment of terminals between multiple networks, avoids waste of network resources, and can improve data to a certain extent. Business rate. In this embodiment, a bearer processing method is also provided. FIG. 2 is a flowchart of a bearer processing method according to an embodiment of the present invention. As shown in FIG. 2, the method includes the following steps: In step S202, the target network receives a request initiated by the service network of the terminal service of the other system, where the request is used to migrate data services carried by the terminal on part or all of the connection bearers in the service network to the target network; Step S204: The target network establishes a connection bearer, and after the connection bearer is successfully established, sends the successfully established connection bearer message to the service network, where the message is used to indicate that the service network releases the successfully connected connection bearer. Unlike Fig. 1, the figure is described from the target network side, but the nature of the scheme is the same as Fig. 1. As a preferred embodiment, the request may be initiated by the core network element of the serving network to the target network; or the core network of the serving network may be triggered by the radio access network element of the serving network to initiate the request. For example, the load-bearing migration process may be initiated by the core network element of the originating network, or may be triggered by the radio access network element in the network of the originating side to trigger the core network element. In this case, the radio access network element is required. Sending a message to the core network, the message instructing the core network element to initiate the request, where the trigger message sent by the network element of the service network radio access network carries at least one of the following: the identification information of the terminal, and the migrated connection bearer Information, identification information of the target side network element. Before the target network establishes a new bearer of the terminal, if the terminal does not establish a connection with the target network, the target network may indicate that the terminal establishes a radio resource control RRC connection through a paging process, or may also be a service network. The signaling indicates that the terminal initiates the establishment of the RRC connection to the target network. For example, after receiving the information sent by the target network to indicate that the terminal is idle, the service network may indicate, by using an indication message, the terminal establishes the RRC connection. The indication message carries the identifier information of the target network, and after the RRC connection is successfully established, the target network establishes a new bearer of the terminal. Preferably, the request carries at least one of the following: identity information of the terminal, information about the migrated connection bearer, and identifier information of the target network element. For example, the identification information of the terminal is the International Mobile Subscriber Identity (IMSI) of the terminal, or the Globally Unique Temporary Identity (GUTI) of the user, and the information of the migrated connection bearer. The at least one of the following: the identifier information of the migrated connection bearer, the quality of service (QoS) information of the migrated connection bearer, and the user plane address information of the migrated connection bearer. In this embodiment, a bearer processing device is also provided, which is located in a service network of the terminal, and is used to implement the above embodiments and preferred embodiments. 3 is a block diagram showing the structure of a bearer processing apparatus according to an embodiment of the present invention. As shown in FIG. 3, the apparatus includes a first transmitting module 32 and a releasing module 34, which will be described below. The first sending module 32 is configured to initiate a request to the target network of the other system, where the request is used to migrate data services carried by the terminal on part or all of the connection bearers in the service network to the target network; The connection to the first sending module 32 is set to receive the response message of the successfully established connection bearer sent by the target network, and release the successfully connected connection bearer. Also provided in this embodiment is a bearer processing device located in a target network for implementing the above embodiments and preferred embodiments. 4 is a structural block diagram of a bearer processing apparatus according to an embodiment of the present invention. As shown in FIG. 4, the apparatus includes a receiving module 42, an establishing module 44, and a second transmitting module 46. The apparatus will be described below. The receiving module 42 is configured to receive a request initiated by a service network for the terminal service of another system, where the request is used to migrate data services carried by the terminal on part or all of the connection bearers in the service network to the target network; The establishing module 44 is connected to the receiving module 42 and configured to establish a connection bearer. The second sending module 46 is connected to the establishing module 44, and is configured to successfully establish the connection bearer sent to the serving network after the connection bearer is successfully established. The response message is used to indicate that the service network releases the connection bearer that the migration succeeded. The foregoing embodiments and the preferred embodiments fully utilize the existing network resources, avoid waste of resources, effectively improve the data service rate of the terminal, and implement mobility of the terminal between multiple networks, and can also implement dynamic load. Balanced, enhances the user experience and reduces the operator's network operation pressure and operating costs. In addition, backward compatibility can be ensured to a certain extent, ensuring a smooth evolution of the wireless access technology. It should be noted that the above effects are not necessarily achieved by every preferred embodiment, and some effects are achieved by certain preferred embodiments. FIG. 5 is a network architecture diagram of multiple network access according to an embodiment of the present invention. As shown in FIG. 5, a wireless terminal (or user equipment) (User Equipment, UE for short) can use a network of multiple wireless access technologies. Access to the same core network gateway. As the anchor point of the data offloading, the gateway divides the downlink data of the core network gateway into multiple sub-data streams and sends them to the wireless terminal users through different wireless communication networks, for example, through an LTE network, or a universal mobile communication system (Universal Mobile Telecommunication System (UMTS) network, or Global System for Mobile Communications (GSM) network, etc. Correspondingly, wireless terminal users can also access one or more of multiple networks. The network sends uplink data. The core network gateway here can reuse the data gateway in the existing network, such as a Packet Data Network Gateway (P-GW) or a Serving Gateway (S-GW) in the LTE network. , or the Gateway GPRS Support Node (GGSN) of the UMTS network. The preferred embodiment is described below in conjunction with the multi-network access framework of FIG. 5. In the preferred embodiment, a method for implementing connection migration (or bearer migration) is provided, and FIG. 6 is a connection migration according to an embodiment of the present invention. A schematic diagram of the method, as shown in FIG. 6, the core network element of the service network of the terminal initiates a migration process to the other standard network, and requests to migrate the data service carried by the terminal on some or all of the connected bearers in the network to the target network. After receiving the message, the core network element of the target network establishes a corresponding connection bearer in the network. After successful, the network element returns a response message to the network element of the process initiation side, and the process initiation side releases the connection bearer successfully migrated. The other standard network may be a network that is providing services to the terminal, or may be other idle networks. The service network of the terminal initiates a migration request to the other network, where the request message carries the identity information of the UE, such as the International Mobile Subscriber Identity (IMSI) of the UE, or the global unified temporary identifier GUTI of the user, and the connection that the current service network is ready to migrate. Bearer information, for example, bearer identification information, bearer quality of service QoS related information, and the like. Preferably, the message may use an interface message between existing different network core networks, for example, using a Forward Relocation Request message, or using a newly introduced message. The method for establishing a migrated bearer by the target network may reuse an existing bearer setup or modification procedure, for example, an initial UE Context Setup, or a bearer modification message (RAB/E-RAB Modify). The target network replies with a response message to the service network, where the response message of the reply may carry the connection bearer identification information successfully established by the target side network. The message may use interface messages between different network core networks, such as using Forward Relocation Response, or using newly introduced messages. The migration process may be initiated by the core network element in the network of the process initiation side, or may be triggered by the network element of the radio access network in the network. In the specific implementation, it is selected according to the requirements of the initiation. If the process is triggered by the radio access network element, the network element of the initiating side radio access network needs to send a message to the core network. After receiving the message, the core network performs the migration negotiation with the target side network through the foregoing process. Preferably, when the network element of the radio access network triggers the migration process of the core network element, the message sent by the network element of the initiating side radio access network to the core network may be the access network element and the core network in the existing protocol. The interface message between the NEs, for example, an E-RAB Release Indication message, or an Uplink Direct Transfer, or a new interface message. Need to indicate the core network in the message Need to initiate a migration of the bearer. In addition, the identifier information of the bearer to be migrated and the identifier information of the target network may also be carried in the message. It should be noted that the service bearer referred to herein refers to a user plane connection bearer established for transmitting data of the user equipment in different standard networks. For example, in an LTE network, the bearer is an evolved universal terrestrial radio access network radio access bearer (E-UTRAN Radio Access Bearer, E-RAB for short) and/or a corresponding air interface bearer; The bearer (Radio Access Bearer, RAB for short) and/or the corresponding air port bearer. The radio access network element refers to an evolved base station (Evolved Node B, referred to as e B) in the LTE network, and the Mobility Management Entity (MME) in the core network element; the radio access network in the UMTS network. The network element refers to the radio network controller (Radio Network Controller, RNC for short) and the base station (Node B) (collectively called the radio network subsystem RNS). The core network element refers to the Serving GPRS Support Node (referred to as the Serving GPRS Support Node). SGSN) or Mobile Switching Center (MSC); In the GSM network, the radio access network element refers to the Base Station Controller (BSC) and the Base Transceiver Station (BTS). (collectively referred to as the base station system BSS), the core network element refers to the SGSN or MSC; similarly, the other networks also refer to the control nodes of the radio access network and the core network, respectively. The dynamic configuration of the bearer of the user equipment in different standard networks such as UMTS, LTE, and GSM can be completed by the foregoing method. The preferred embodiments are described below in conjunction with various preferred embodiments. FIG. 7 is a flowchart of a bearer processing method according to a preferred embodiment of the present invention. As shown in FIG. 7, the process includes the following steps: In the preferred embodiment, the UE is in a connected state, that is, a UE, in both the LTE and UTMS networks. In the multi-network access state. The UE has multiple connection bearers on the two networks, and carries data of several services respectively. For example, in the LTE network, the connection bearers corresponding to services 1 and 2 are bearer 1 and bearer 2, and the service 3 exists in the UMTS network. The corresponding connection bearer is bearer 3. Step S702, the MME determines that the network load is too high, and therefore initiates a migration request of the connection bearer, and prepares to migrate the connection bearer 1 to the UMTS network. The MME initiates a bearer migration process to the target network element SGSN, for example, by using a Forward Relocation Request message, where the message carries the identity information of the UE (for example, IMSI), and the bearer of the connection bearer 1 to be migrated. Identification information, QoS attributes of the bearer, and information about the user plane address carried; Step S704, the SGSN finds the context information of the UE in the UMTS network according to the IMSI of the UE in the request information, finds the network information of the existing bearer 3, including the RNS information, and then initiates a corresponding bearer modification process to the RNS. The new bearer (bearer 4) to be migrated in the network, including the ground bearer between the SGSN and the RNS, the air interface bearer between the RNS and the UE, and the bearer between the SGSN and the gateway; Step S706, SGSN direction The RNS initiates a radio access bearer assignment request (RAB ASSIGNMENT REQUEST), which carries a new bearer identifier corresponding to the bearer 4, QoS parameter information, and user plane address related information of the bearer 4, etc.; Step S708, the RNS initiates radio resource control to the UE. The RRC Reconfiguration Request is configured to establish an air interface connection bearer corresponding to the bearer 4. After the establishment is complete, the UE replies to the RNS by using a radio resource control reconfiguration complete message (RRC Reconfiguration complete) message, indicating that the air interface connection is successfully established; Step S710 , the RNS sends a radio access bearer assignment response (RAB Assignment Response) to the SGSN. And indicating that the connection bearer is successfully established. Step S712, after receiving the message, the SGSN modifies the context of the UE in the UMTS network, and sends a bearer migration response to the MME, for example, by using a Forward Relocation Response message. . Preferably, the successfully established bearer identification information and the like may be carried in the message. Indicates that the connection bearer 1 is successfully established in the UMTS network. In step S714, after receiving the message, the MME releases the successfully migrated bearer 1, including the terrestrial bearer between the MME and the e B, and the air interface between the eNB and the UE. Hosting and so on. Finally, the SGSN only needs to notify the gateway to migrate the data carried on the connected bearer 1 in the LTE network to the bearer 4 established in the UMTS network, thus completing the migration of the UE bearer between the two networks. It should be noted that the triggering of the foregoing process may be triggered by the network element of the radio access network, or may be caused by the MME considering that the quality of the network signal is degraded, or the service QoS requirement, or the user needs to be charged. quasi. FIG. 8 is a flowchart of a bearer processing method according to a preferred embodiment of the present invention. The triggering reason of the process is that the radio access network element triggers the initiation. As shown in FIG. 8, the process includes the following steps: Step S800, the eNB passes The S1 port message indicates that the MME initiates a bearer migration process. For example, the E-RAB Release Indication message is carried in the message carrying the identifier of the bearer to be migrated. Information. In order to distinguish from a normal release indication message, the cause value in the message can be set to "connection migration" or other similar reasons. Further, the e B may also carry the identifier information of the target network element to be migrated, for example, the identifier of the target cell, and the like. Steps S802 to S814 are the same as steps S702 to S714 of the first preferred embodiment. FIG. 9 is a flowchart of a bearer processing method according to a preferred embodiment of the present invention. As shown in FIG. 9, the process includes the following steps: In the preferred embodiment, the UE is currently only in the connected state of the GSM network. The UE has a connection bearer corresponding to multiple services in the GSM network, for example, service 1, service 2, service 3 corresponding bearer 1, bearer 2, and bearer 3. It is now necessary to migrate bearers 3 in the GSM network to the UMTS network through a migration process. At this time, no connection exists in the UMTS network, that is, the UE is still in the idle state in the UTMS network. Step S902: The SGSN in the GSM network determines that the current GSM network of the UE does not meet the quality of service (QoS) requirement of the service 3 carried on the bearer 3, and therefore decides to migrate the service on the bearer to the UMTS network. Therefore, the SGSN in the GSM network, as the initiating side network element, initiates a bearer migration process to the target SGSN network element, for example, by using a forward relocation request message or using a new bearer migration request message, carrying the identifier of the UE in the message. Information IMSI, and the identity information of the bearer 3 to be migrated, the QoS attribute of the bearer 3, and the user plane address related information of the bearer 3, etc.; Step S904, the target side SGSN finds that the UE has no connection in the network according to the identifier information of the UE. That is, in the idle state, the paging is initiated to the UE in the UMTS network. Step S906, after receiving the paging message, the UE initiates an RRC connection establishment to the access network network RNS corresponding to the cell where the UE is currently located; Step S908, the RNS is After the RRC connection is successfully established, the initial UE message is sent to the core network (ie, the target side SGSN); Step S910, the target side SGSN establishes a context for the UE in the UMTS network, and according to the migration sent by the originating side SGSN The request message initiates a corresponding new bearer (the new bearer identifier is allocated by the SGSN, which may be referred to herein as bearer 4), including the corresponding SGSN and RNS. Bearer between the ground, the air interface between the RNS and the UE bearer, and the bearer between the SGSN and the gateway. The target SGSN initiates an RAB assignment message to the RNS, where the bearer carries the identification information of the bearer 4, the parameter configuration information of the QoS of the bearer 4, and the user plane transport address information corresponding to the bearer 4; Step S912: The RNS initiates an RRC reconfiguration request message to the UE according to the request, where the parameter configuration information of the bearer bearer corresponding to the bearer 4, including the identifier of the bearer, and the underlying transport configuration. After the establishment is successful, the UE sends an RRC reconfiguration response message to the RNS. Step S914, after receiving the response, the RNS sends an RAB assignment response message to the target side SGSN, indicating that the target side SGSN bearer setup is successful; Step S916, the target side SGSN is on the bearer. After the establishment is successful, the response is sent to the initiator side, for example, through a Forward Relocation Response message or a newly introduced bearer migration response. Optionally, the message may carry the bearer identification information that is successfully established, and the like. Step S918: After receiving the message, the initiating side releases the bearer 3 that successfully migrates, including the ground bearer between the initiating side SGSN and the originating side RNS, and The air interface bearer between the RSN and the UE. Finally, the target-side SGSN informs the gateway to migrate the data sent to the initiator-side bearer 3 to the bearer 4 in the UMTS network, thus completing the migration of the UE's bearer between the two networks. Similarly, the triggering reason of the foregoing process may be that the SGSN of the originating side considers that the quality of the signal of the network is deteriorated, or the load of the network is too high, and the implementation is subject to the specific implementation. It should be noted that, in step S904 and step S906 of the foregoing process, when the UE is in an idle state on the target side network, the paging procedure used by the target side to establish an initial RRC connection may also be adopted by the originating side network. The signaling of the connection notifies the UE to initiate an RRC connection establishment process in the target network, namely:

1. Step S902 of the third preferred embodiment;

2. The target side SGSN discovers that the UE is in an idle state, and notifies the originating side SGSN. The message may indicate the originating SGSN by using a Forward Relocation Failure, and indicates that the UE is currently in an idle state on the target side;

3. The originating side The SGSN instructs the UE to initiate an RRC connection on the UMTS network through an Access Layer (AS) or a Non-Access Stratum (NAS) message. The AS message or the NAS message may be a known message, for example, an RRC reconfiguration request message, or a command ID (COMMAND ID) message, etc.; or may be a new message; 4. The UE establishes an RRC in the target cell according to the indication. Connection establishment

5-10. The initiating side SGSN re-initiates the bearer migration process. In this case, the target SGSN only needs to perform the establishment of the connection bearer. The specific steps are the same as steps S908 to S918 in the third embodiment. Similarly, the foregoing process may also be initiated by the access network element BSS to trigger the SGSN to initiate, that is, the BSS instructs the SGSN to initiate the bearer migration process by using the Iu interface message. For example, the bearer release indication message or the like carries the identifier information of the bearer that needs to be migrated. In order to distinguish between normal release indication messages, the cause value in the message can be set to "migration migration" or other similar reasons. Further, the BSS may also carry the target network element identification information to be migrated, such as the identifier of the target cell, in the message. The SGSN initiates a bearer migration process to the target network element according to the indication information. Specifically, the process described in the third embodiment may be adopted. 10 is a flowchart of a bearer processing method according to a preferred embodiment 4 of the present invention. As shown in FIG. 10, the process includes the following steps: In the preferred embodiment, the UE is simultaneously connected to the GSM network and the LTE network, that is, at most Network connection state. The UEs have services in both networks. The bearers carrying different services in the corresponding two networks are uniformly marked as bearer 1 and bearer 2. Here, the access network element actively triggers the migration process between the two networks. Step S1002: The GSM network access network element BSS determines that the current radio signal quality is deteriorated, so that the bearer of the current network needs to be migrated, so the SGSN is instructed to initiate a bearer migration process, for example, by a PS Handover Required message. , or a newly introduced interface message. The message carries the identification information of the bearer to be migrated (for example, bearer 1), the corresponding QoS attribute parameter, and the corresponding transport address information. Further, the message further carries the identifier information of the target network, for example, the identifier information of the target e B. Step S1004, the SGSN searches for the corresponding MME according to the identifier of the target eNB, and initiates a radio access bearer migration process to the message. The process may multiplex the existing forward relocation request message or use the newly added bearer migration request message, where the message carries the identity information IMSI of the UE, and the identity information of the bearer 1 to be migrated, the QoS attribute of the bearer 1, and The user plane address related information of the bearer 1 is obtained. In step S1006, the MME finds the context information of the UE in the UMTS network according to the identifier information of the UE, and therefore determines to establish a new bearer corresponding to the bearer 1 on the basis of the existing connection (for example, called a bearer). 3). The MME initiates a bearer setup request (E-RAB Setup Request) to the eNB, where the bearer carries the new bearer identifier corresponding to the bearer 1, the QoS parameter information, and the information about the user plane address of the bearer 1; Step S1008: The eNB initiates radio resource control to the UE. The RRC Reconfiguration Request is configured to establish an air interface connection bearer corresponding to the bearer 3, and after the establishment is completed, the UE replies to the e B by using a radio resource control reconfiguration complete message (RRC Reconfiguration complete), indicating that the air interface connection is successfully established; Step S1010: The eNB sends an E-RAB Setup Response message to the MME, indicating that the connection bearer is successfully established. Step S1012: After receiving the message, the MME modifies the context of the UE in the UMTS network, and sends the bearer migration to the SGSN. Response, such as through a Forward Relocation Response message. Optionally, the message may carry the successfully established bearer identification information and the like. Indicates that the connection bearer 1 is successfully established in the LTE network. In step S1014, after receiving the message, the SGSN sends a bearer release message to the initiating side BSS. For example, the Iu Release message is released through the Iu interface, and the bearer 1 is released. The ground bearing and the air interface are supported. Finally, the target SGSN notifies the core network gateway to migrate the service data originally sent to the GSM network to the bearer 3 on the LTE network, thereby completing the migration of the bearer. In the above embodiments and preferred embodiments, the originating side may also migrate all bearers to the target network. The foregoing embodiments and preferred embodiments may be applicable to a bearer migration process between any two networks, and specific message names used in different networks may be different. Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device so that they may be stored in the storage device by the computing device, or they may be separately fabricated into individual integrated circuit modules, or Multiple modules or steps are made into a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

Claim

1. A bearer processing method, comprising:

The service network of the terminal initiates a request to the target network of the other system, where the request is used to migrate data services carried by the terminal on part or all of the connection bearers in the service network to the target network;

After receiving the response message sent by the target network and successfully establishing the connection bearer, the service network releases the successfully connected connection bearer.

2. The method according to claim 1, wherein the initiating the request by the service network to the target network comprises:

The core network element of the service network initiates the request to the target network; or the radio access network element of the service network triggers a core network element of the service network to initiate the request.

3. The method according to claim 2, wherein the radio access network element of the serving network triggers the core network element of the serving network to initiate the request, including:

The service network radio access network element sends a trigger message to the core network element of the service network, where the trigger message carries at least one of the following: the identifier information of the terminal, the migrated connection Information carried, the identification information of the network element of the target side network.

The method according to claim 3, wherein, before the target network establishes a new bearer of the terminal, in a case that the terminal does not establish a connection with the target network,

The target network instructs the terminal to establish a radio resource control RRC connection through a paging procedure, or

The serving network instructs the terminal to establish the RRC connection on the target network by signaling.

The method of claim 4, wherein the serving network instructing the terminal to establish the RRC connection comprises:

After receiving the information that is sent by the target network to indicate that the terminal is idle, the service network instructs the terminal to establish the RRC connection by using an indication message, where the indication message carries the target network. Identification information.

The method according to any one of claims 1 to 5, wherein the request carries at least one of the following: identity information of the terminal, information of the migrated connection bearer, the target network ID information of the NE.

The method according to claim 6, wherein the information about the migrated connection bearer comprises at least one of the following:

The identification information of the migrated connection bearer, the quality of service of the migrated connection bearer, and the user plane address information of the migrated connection bearer.

8. A bearer processing method, comprising:

The target network receives a request from another service system for the service network of the terminal service, where the request is used to migrate data services carried by the terminal on part or all of the connection bearers in the service network to the target The internet;

The target network establishes a connection bearer, and after the connection bearer is successfully established, sends a successfully established message of the connection bearer to the service network, where the message is used to indicate that the service network releases the successfully connected connection bearer. .

The method according to claim 8, wherein before the target network receives the request initiated by the service network, the method further includes:

The method according to claim 8, wherein the message that the target network element sends the successfully established connection bearer to the service network includes: the service network that the target network successfully establishes requests the migrated bearer Identification information.

A bearer processing device, located in a service network of the terminal, comprising:

a first sending module, configured to initiate a request to a target network of another system, where the request is used to migrate data services carried by the terminal on part or all of the connected bearers in the serving network to the target network ;

The release module is configured to: after receiving the message of successfully establishing the connection bearer sent by the target network, initiate a connection bearer that releases the successful migration. The bearer processing device is located in the target network and includes: The receiving module is configured to receive a request initiated by the serving network for the terminal service of another system, where the request is used to migrate the data service carried by the terminal on part or all of the connected bearers in the serving network to The target network;

Establish a module, set to establish a connection bearer;

And a second sending module, configured to send the message of the connection bearer successfully sent to the service network after the connection bearer is successfully established, where the message is used to indicate that the service network initiates a connection bearer that successfully releases the migration.