WO2012130046A1

WO2012130046A1 - Method and apparatus for transferring service bearer

Info

Publication number: WO2012130046A1
Application number: PCT/CN2012/072376
Authority: WO
Inventors: 和峰; 韩立锋; 艾建勋
Original assignee: 中兴通讯股份有限公司
Priority date: 2011-03-25
Filing date: 2012-03-15
Publication date: 2012-10-04
Also published as: CN102695234A

Abstract

Disclosed in the present invention are a method and an apparatus for transferring service bearer. The method and the apparatus are used in a multi-network access system, which comprises: a plurality of wireless communication networks and a core network gateway which supports the plurality of wireless communication networks; wherein the plurality of wireless communication networks connects with each other in parallel, and one end of the plurality of wireless communication networks connected with each other in parallel is connected to a multi-mode wireless terminal in parallel, and the other end is connected to the core network gateway in parallel; the method for transferring service bearer comprises: determining the first wireless communication network of the plurality of wireless communication networks to initiate an indication message of the service bearer transfer, transferring part or whole of the ongoing service bearer of the multi-mode wireless terminal to another wireless communication network of the plurality of wireless communication networks except the first one. With the technical schemes of the present invention, data traffic rates of terminals are improved; existing network resources are fully used; terminal mobility and dynamic load balance among a plurality of networks are realized; user experience is improved effectively.

Description

The present invention relates to the field of communications, and in particular to a service bearer migration method and apparatus. BACKGROUND With the continuous evolution of wireless communication technologies and standards, mobile packet services have been greatly developed, and the data throughput capability of a single terminal is constantly increasing. Taking the Long Term Evolution (LTE) system as an example, the downlink maximum rate of 100 Mbps data transmission can be supported in a 20 M bandwidth. In the subsequent enhanced LTE (LTE Advanced) system, the data transmission rate will be further improved. As the volume of data traffic expands, the demand for transmission rates and traffic by 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 increasingly expecting to deploy LTE networks. However, due to the fact that the replacement of commercial networks cannot be achieved in the actual network, in the future, new technologies such as LTE will not reach full coverage in the future, while the traditional 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 currently 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. This imbalance will also lead to a decline in the user experience. On the other hand, the congested network will also bring 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 operators. Capital Expenditure (CAPEX). The above problems force operators to find a new solution. 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. However, the related problem still cannot solve the mobility problem of the terminal between multiple networks. When the terminal discovers a new inter-RAT (Cell-Inter-RAT) cell, all the services that the terminal is conducting can only be used as a whole in different cells. Room For migration, such mobility is not flexible enough to fully utilize existing network resources, and multiple networks connected to the terminal cannot be dynamically integrated. SUMMARY OF THE INVENTION The present invention provides a service bearer migration method and apparatus, so as to at least solve the problem in the related art that all services that are being performed by a terminal are migrated between different cells as a whole, resulting in inflexibility of mobility. According to an aspect of the present invention, a migration method of a service bearer is provided. The method for migrating a service bearer according to the present invention is applied to a multi-network access system, the multi-network access system comprising: a plurality of wireless communication networks, and a core network gateway supporting a plurality of wireless communication networks; wherein, the plurality of wireless communications The network is connected in parallel, and one end of the plurality of wireless communication networks connected in parallel is connected to the multimode wireless terminal, and the other end is connected to the core network gateway; the migration method of the service bearer includes: determining the first among the plurality of wireless communication networks The wireless communication network initiates a service bearer migration process; and migrates part or all of the service bearers currently performed by the multimode wireless terminal to other wireless communication networks of the plurality of wireless communication networks except the first wireless communication network. Preferably, the foregoing service bearer migration process is implemented by enhancing a cross-system handover process. Preferably, the first wireless communication network includes: a radio access network network element, and the service bearer migration process is initiated by the radio access network element. Preferably, the radio access network element sends a handover request message or a relocation request message to the core network element of the first radio communication network to initiate a service bearer migration procedure. Preferably, the handover request message or the relocation request message carries: a bearer identifier to be migrated on the source side, a target side network element identifier, and user plane transport address information corresponding to the bearer to be migrated. Preferably, the foregoing handover request message or relocation request message further carries: differentiated identification information of the migration process. Preferably, the first wireless communication network further includes: a core network element, before the service bearer migration process is initiated by the radio access network element, the method further includes: sending, by the core network element, a service bearer migration to the radio access network element The indication message is used to trigger the radio access network element to initiate a service bearer migration process. Preferably, the service bearer migration indication message is an interface message or a preset interface message between the core network element and the radio access network element. Preferably, the service bearer migration indication message carries at least one of the following: information corresponding to the service bearer to be migrated, and the target side network element identifier. Preferably, the migrating part or all of the service bearers currently performed by the multimode wireless terminal to the other wireless communication network includes: the multimode wireless terminal receiving the handover command from the first wireless communication network, where the handover command carries the indication multimode The wireless terminal migrates some or all of the current service bearers to information of other wireless communication networks; the multimode wireless terminal accesses other wireless communication networks, and migrates some or all of the service bearers to other wireless communication networks. Preferably, after migrating part or all of the service bearers currently performed by the multi-mode wireless terminal to other wireless communication networks, the method further includes: the core network element of the other wireless communication network notifying the core network gateway to modify part or all of the services by modifying the bearer process. Carry the corresponding bearer information. Preferably, the foregoing radio access network element includes one of the following: a base station subsystem BSS, a radio network subsystem RNS, an evolved base station e B, and a wireless local area network WLAN access point. Preferably, the core network element includes one of the following: a serving general packet radio service support node SGSN or a mobile switching center MSC; a mobility management entity MME and/or a serving gateway S-GW; and an evolved packet data gateway ePDG. Preferably, the core network gateway includes one of the following: a gateway general packet radio service support node GGSN; a packet data network gateway P-GW and/or a serving gateway S-GW. Preferably, the core network gateway is a preset gateway node. According to another aspect of the present invention, a migration device for a service bearer is provided. The migration device of the service bearer according to the present invention is applied to a multi-network access system, the multi-network access system comprising: a plurality of wireless communication networks, and a core network gateway supporting a plurality of wireless communication networks; wherein, the plurality of wireless communication The network is connected in parallel, and one end of the plurality of wireless communication networks connected in parallel is connected to the multimode wireless terminal, and the other end is connected to the core network gateway; the migration device of the service bearer includes: a determining module, configured to determine multiple wireless The first wireless communication network in the communication network initiates a service bearer migration indication message; the migration module is configured to migrate part or all of the service bearers currently performed by the multimode wireless terminal to the plurality of wireless communication networks except the first wireless communication network. Other wireless communication networks. According to the present invention, a service bearer migration indication message initiated by one of the plurality of wireless communication networks is received in a multi-network access system, and some or all of the service bearers currently carried by the multi-mode wireless terminal are migrated. To other wireless communication networks in the plurality of wireless communication networks, wherein the multiple network access system The method includes: a plurality of wireless communication networks, and a core network gateway supporting the plurality of wireless communication networks; the plurality of wireless communication networks are connected in parallel, and the plurality of wireless communication networks connected in parallel are connected at one end The modulo wireless terminal is connected to the core network gateway at the other end. The invention solves the problem that the related services in the related art are migrated between different cells as a whole, resulting in inflexibility of mobility, thereby improving the rate of the terminal data service and making full use of the existing network resources. Terminal mobility and dynamic load balancing between networks effectively enhances the user experience. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are set to illustrate,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, 1 is a block diagram of a multi-network access system according to an embodiment of the present invention; FIG. 2 is a flowchart of a service bearer migration method according to an embodiment of the present invention; FIG. 3 is a service according to an example 1 of the present invention; FIG. 4 is a flowchart of a service bearer migration method according to Example 2 of the present invention; FIG. 5 is a flowchart of a service bearer migration method according to Example 3 of the present invention; and FIG. 6 is a flowchart according to an embodiment of the present invention. The structure of the service bearer migration device. 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. 1 is a block diagram of a multi-network access system in accordance with an embodiment of the present invention. As shown in FIG. 1, the system includes a plurality of wireless communication networks (10, 12...1N), and a core network gateway 20 supporting a plurality of wireless communication networks; wherein, a plurality of wireless communication networks are connected in parallel, and One end of the plurality of wireless communication networks connected in parallel is connected to the multimode wireless terminal 30, and the other end is connected to the core network gateway 20. In a specific implementation process, the multi-mode wireless terminal 30 (or user equipment (UE)) can access the same core network gateway through a network of multiple radio access technologies. As the anchor of the data offloading, the gateway divides the downlink data of the core network gateway into multiple sub-data streams, and respectively passes different The line communication network is sent to the wireless terminal user, for example, via an LTE network, or a universal mobile communication system

(Universal Mobile Telecommunication System, UMTS for short) network, or Global System for Mobile Communications (GSM) network; etc. Correspondingly, multimode wireless terminals can also access one of multiple networks. Or multiple networks send uplink data. The core network gateway here can reuse the data gateway in the existing network, for example, 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. Based on the foregoing multi-network access system, an embodiment of the present invention provides a service bearer migration method. This will be described below in conjunction with FIG. 2. 2 is a flowchart of a service bearer migration method according to an embodiment of the present invention. As shown in FIG. 2, the service bearer migration method includes the following processes: Step S202: Determine a first wireless communication network initiates a service bearer migration process in multiple wireless communication networks; Step S204: Perform part or all of the current multimode wireless terminal The service bearer is migrated to other wireless communication networks other than the first wireless communication network among the plurality of wireless communication networks. In the related art, all services in progress of the terminal are migrated between different cells as a whole, resulting in inflexibility of mobility. The above method shown in FIG. 2 can improve the data service rate of the terminal, fully utilize the existing network resources, and achieve terminal mobility and dynamic load balancing among multiple networks, thereby effectively improving the user experience. The service bearer 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 refers to an evolved universal terrestrial radio access network radio access bearer (E-UTRAN Radio Access Bearer, E-RAB) and its corresponding air interface bearer, and refers to radio access in the UMTS network. The bearer (Radio Access Bearer, RAB for short) and its corresponding air interface bearer. Preferably, the first wireless communication network includes: a radio access network network element, and the service bearer migration process may be initiated by the radio access network element. In a preferred implementation process, the foregoing process of migrating a service bearer may reuse an existing inter-RAT handover process implementation. Preferably, the radio access network element sends a cross-system cut by sending a handover request message or a relocation request message to a core network element of the first wireless communication network. The switching process (that is, the foregoing service bearer migration process) needs to carry the identification information of the service or bearer to be migrated, the target side network element identifier, and the user plane address information corresponding to the bearer to be migrated in the handover request message or the relocation request message. In order to distinguish the general handover process, the handover information may optionally carry the identification information of the migration (handover) process. Preferably, the first wireless communication network may further include: a core network element, before the service bearer migration process is initiated by the radio access network element, the method further includes: the core network element to the wireless The access network element sends a service bearer migration indication message to trigger the radio access network element to initiate the service bearer migration process. In a preferred implementation process, the core network element may initiate a service bearer migration indication message to the corresponding access network element, and then the access network element initiates a service bearer migration process according to the indication message, and the specific process and the access network The migration process initiated by the meta is the same. Preferably, the service bearer migration indication message initiated by the core network element may multiplex the interface message between the existing core network element and the radio access network element, or may be preset (ie newly introduced). Interface message. Preferably, the service bearer migration indication message may carry at least one of the following: information about the service bearer to be migrated, and/or the target information of the migrated target side network; optionally, the service bearer migration indication message may also be It is just an empty message, which is used to indicate that the radio access network element performs migration. Preferably, the above step S204 may further include the following processing:

(1) The multimode wireless terminal receives a handover command from the first wireless communication network, where the handover command carries the indication that the multimode wireless terminal migrates some or all of the current service bearers to the Information about other wireless communication networks;

(2) The multimode wireless terminal accesses the other wireless communication network, and migrates part or all of the service bearers to the other wireless communication network. Preferably, after the step S204 is performed, the following processing may be further included: the core network element of the other wireless communication network notifies the core network gateway to modify bearer information corresponding to the part or all service bearers by modifying the bearer process. In a specific implementation process, in the LTE network, the radio access network element may include: an Evolved Node B (eB), and the core network element may include: a Mobility Management Entity (abbreviated as MME) and/or Serving Gateway (S-GW); In the UMTS network, the radio access network element may include: a radio network controller (Radio Network Controller, RNC for short) and a base station (Node B) (the RNC and the Node B may be collectively referred to as a radio network subsystem (RNS)) The core network element may include: a Serving GPRS Support Node (SGSN) or a Mobile Switching Center (MSC); in the GSM network, the radio access network element The base station controller (BSC) and the base station (Base Transceiver Station, BTS for short) (the BSC and the BTS may be collectively referred to as a base station subsystem (BSS)), and the core network element may include an SGSN or an MSC. Of course, in other networks, the foregoing radio access network element may be a control node of the radio access network in the network, and the core network element may also be a control node of the core network in the network. The core network gateway is a gateway of the mobile communication network to the external network interface, and the external network includes: a Public Switched Telephone Network (PSTN) or an IP network. In a preferred implementation process, the core network gateway may multiplex a gateway node in a communication network of each current radio access technology. For example, it may correspond to a Gateway General Packet Radio Service Node (Gateway GPRS Support Node, GGSN for short) in a 2G network packet domain (PS), or a GGSN node of a PS domain of 3G, or LTE. A Packet Data Network Gateway (P-GW) or a Serving Gateway (S-GW) node in the network. The foregoing gateway can support the data offloading function in the multi-network access, that is, the received downlink data can be offloaded, and the downlink data after the offload processing is transmitted through one or more of the plurality of wireless communication networks connected thereto For multi-mode wireless terminals, see Figure 1 for details. Based on the architecture shown in FIG. 1, the service bearer migration method can be used to implement partial service/bearer-based mobility between multi-mode wireless terminals (ie, user equipments) in different standard networks such as UMTS, LTE, and GSM. The details are described below in conjunction with FIGS. 3 to 5. FIG. 3 is a flowchart of a service bearer migration method according to an example 1 of the present invention. For example, the UE moves between the LTE network and the UTMS network (the LTE network is the source side and the UMTS is the target side). As shown in FIG. 3, the service bearer migration method mainly includes the following processes: Step S302: The UE is in a connected state in the LTE network, and performs data transmission by the eNB and the gateway. Step S304: The UE finds an available UMTS cell by measurement, and reports the information to e B. Step S306: The eNB, according to the policy of the local base station, for example, the load under the local base station is too high, and determines to migrate the service bearer corresponding to the part of the service established by the terminal to the UMTS cell, and therefore sends a handover request to the MME (Handover Required). The message, where the message carries the bearer identification information to be migrated, and the user plane transport address information corresponding to the bearer. Optionally, in order to distinguish from the general handover process, the eNB may further add an indication bit to the message to indicate that the handover process is enhanced. Step S308: The MME sends a Forward Relocation Request message to the target core network element SGSN according to the information, where the message carries the bearer related information that needs to be migrated. Step S310: The SGSN sends a Relocation Request to the corresponding Radio Network Subsystem (Radio Network Subsystem, RNS for short). If the RNS can accept the bearer that needs to be migrated, the Relocation Request Acknowledge information is sent to the SGSN. Step S312: The SGSN sends a Forward Relocation Response message to the source MME. Step S314: The MME sends a Handover Command message to the eNB. Step S316: The eNB sends a handover command message to the UE, instructing the terminal to perform handover. In order to distinguish the normal handover process, the corresponding indication information may be carried in the message. Step S318: The UE accesses the target side RNS and sends a Handover to UTRAN Complete message. Step S320: The RNS notifies the SGSN of a Relocation Complete message, and notifies the terminal that the terminal has successfully accessed the network. Step S322: The SGSN informs the source side MME that the bearer has successfully migrated to the UMTS network by using a Forward Relocation Complete procedure. Step S324: At the same time, the SGSN notifies the gateway by modifying the bearer process (Modify Bearer), and modifies the bearer information of the migrated part, and the data transmitted on the subsequent corresponding bearer needs to send the UE through the UMTS network. Step S326: The MME releases the successfully migrated bearer and corresponding resources on the source side. Step S328: The mobility of the partial bearer is completed at this time, and the UE can access the gateway through the LTE network and the UMTS network at the same time to perform data transmission. 4 is a flow chart of a service bearer migration method according to Example 2 of the present invention. The migration process is initiated by the core network element. As shown in FIG. 4, the service bearer migration method mainly includes the following processes: Step S402: The UE is in a connected state in the LTE network, and performs data transmission by the eNB and the gateway. Step S404: The MME initiates a migration indication to the eNB, instructing the eNB to initiate a migration process. Optionally, the MME may notify the eNB of the service or bearer information that needs to be migrated by using the message, including the identifier information of the service or the bearer. Optionally, the MME may also notify the eNB of the migrated target network information, such as the identifier information of the target RNS. Further, the migration indication information may be existing signaling of the S1 interface, for example, using a UE Context Modification Request, and may also use a newly introduced new message. Step S406: The eNB sends a Handover Required message to the MME, where the message carries the bearer identification information to be migrated, and the user plane transport address information corresponding to the bearer. Optionally, in order to distinguish from the general handover process, the eNB may further add an indication bit to the message to indicate that the handover process is enhanced. Step S408: The MME sends a Forward Relocation Request message to the target core network element SGSN according to the information, where the message carries the bearer related information that needs to be migrated. Step S410: The SGSN sends a Relocation Request to the corresponding Radio Network Subsystem (Radio Network Subsystem, RNS for short). If the RNS can accept the bearer that needs to be migrated, the Relocation Request Acknowledge information is sent to the SGSN. Step S412: The SGSN sends a Forward Relocation Response message to the source MME. Step S414: The MME sends a Handover Command message to the eNB. Step S416: The eNB sends a handover command message to the UE, instructing the terminal to perform handover. In order to distinguish the normal handover process, the corresponding indication information may be carried in the message. Step S418: The UE accesses the target side RNS and sends a Handover to UTRAN Complete message. Step S420: The RNS notifies the SGSN of a Relocation Complete message, and notifies the terminal that the terminal has successfully accessed the network. Step S422: The SGSN informs the source side MME that the bearer has successfully migrated to the UMTS network by using a Forward Relocation Complete procedure. Step S424: At the same time, the SGSN notifies the gateway by modifying the bearer process (Modify Bearer), and modifies the bearer information of the migrated part, and the data transmitted on the subsequent corresponding bearer needs to send the UE through the UMTS network. Step S426: The MME releases the successfully migrated bearer and corresponding resources on the source side. Step S428: The mobility of the partial bearer is completed at this time, and the UE can access the gateway through the LTE network and the UMTS network at the same time to perform data transmission. It should be noted that the above steps S406 to S426 are the same as steps S306 to S326 shown in FIG. 3, and details are not described in FIG. FIG. 5 is a flowchart of a service bearer migration method according to Example 3 of the present invention. Wherein, the movement of the UE between the GSM and the LTE network is taken as an example. The GSM network is the source side, and the LTE network is the target side. As shown in FIG. 5, the service bearer migration method mainly includes the following processing: Step S502: The UE is in a connected state in the GSM network, and passes through the base station subsystem (Base Station).

Subsystem, referred to as BSS), transmits data to and from the gateway. Step S504: The UE discovers the LTE cell by using the measurement, and reports the information to the BSS. Step S506: The BSS decides to migrate part of the bearer in the current network to the LTE network, and therefore sends a PS Handover Required message to the SGSN, where the bearer identification information to be migrated is carried, and the bearer corresponding to the bearer The user plane transmits address information and the like. Optionally, in order to distinguish from the general handover process, an indication bit may be added to the message to indicate that the handover process is enhanced. Step S508: The SGSN sends a Forward Relocation Request message to the target core network element MME according to the information, where the message carries the bearer related information that needs to be migrated. Step S510: The MME sends a handover request (Handover Request) to the corresponding e B. If e B can accept the bearer that needs to be migrated, the Handover Request Acknowledge information is sent to the MME. Step S512: The MME sends a Forward Relocation Response message to the source SGSN. Step S514: The SGSN sends a Relocation Required Acknowledge message to the BSS. Step S516: The BSS sends a handover command message to the UE, instructing the terminal to switch to the LTE network. In order to distinguish the normal handover process, the corresponding indication information may be carried in the message. Step S518: The UE accesses the target side e B and sends a Handover to EUTRAN Complete message. Step S520: The e B sends a Handover Notify message to the MME to notify the terminal that the network has successfully accessed the network. Step S522: The MME notifies the source side SGSN that the bearer has been successfully migrated by using the Forward Relocation Complete process. To the LTE network. Step S524: At the same time, the MME notifies the gateway by modifying the bearer process (Modify Bearer), and modifies the bearer information of the migrated part, and the data transmitted on the subsequent corresponding bearer needs to send the UE through the LTE network. Step S526: The SGSN releases the successfully migrated bearer and corresponding resources on the source side. Step S528: The migration of the partial bearer is completed at this time, and the UE can access the gateway through the GSM network and the LTE network at the same time to perform data transmission. Based on the foregoing multi-network access system shown in FIG. 1, the embodiment of the present invention further provides a service bearer migration apparatus. Description will be made below with reference to FIG. 6. FIG. 6 is a structural block diagram of a service bearer migration apparatus according to an embodiment of the present invention. As shown in FIG. 6, the service bearer migration apparatus includes: a determining module 60 and a migration module 62. The determining module 60 is configured to determine a first wireless communication network initiating a service bearer migration process in the plurality of wireless communication networks; the migration module 62, The receiving module 60 is connected to be configured to migrate some or all of the service bearers currently performed by the multimode wireless terminal to other wireless communication networks other than the first wireless communication network. The device shown in FIG. 6 can improve the data service rate of the terminal, fully utilize the existing network resources, and achieve terminal mobility and dynamic load balancing among multiple networks, thereby effectively improving the user experience. Preferably, the foregoing first wireless communication network may include, but is not limited to: a radio access network element, and the service bearer migration process may be initiated by the radio access network element. Preferably, the step of initiating the service bearer migration by the radio access network element includes: processing, by the radio access network element, a handover request message or relocation to a core network element of the first radio communication network Request message. The handover request message or the relocation request message may include: a bearer identifier to be migrated on the source side, a target side network element identifier, and user plane transport address information corresponding to the bearer to be migrated. Preferably, the foregoing first wireless communication network may further include: but not limited to: a core network element, and before the service bearer migration process is initiated by the network element of the radio access network, the method further includes: The radio access network element sends a service bearer migration indication message to trigger the radio access network element to initiate the service bearer migration process. In a preferred implementation process, the core network element may initiate a service bearer migration indication message to the corresponding access network element, and then the access network element initiates a service bearer migration process according to the indication message, and the specific process and the access network The migration process initiated by the meta is the same. Preferably, the service bearer migration indication message initiated by the core network element may multiplex the interface message between the existing core network element and the radio access network element, or may be preset (ie newly introduced). Interface message. Preferably, the service bearer migration indication message may carry at least one of the following: information about the service bearer to be migrated, and/or the target information of the migrated target side network; optionally, the service bearer migration indication message may also be It is just an empty message, which is used to indicate that the radio access network element performs migration. In summary, the foregoing embodiments provided by the present invention can effectively improve the data traffic rate of the terminal, fully utilize the existing network resources to avoid waste, and implement terminal mobility and dynamic load balancing among multiple networks. It enhances the user experience and reduces the operator's network operation pressure and operating costs. In addition, the technology can ensure sufficient backward compatibility and ensure the smooth evolution of wireless access technology. 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 respective integrated circuit modules. Alternatively, multiple modules or steps of them can be implemented as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software. The above are only the preferred embodiments of the present invention, and are 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

A service bearer migration method, which is applied to a multi-network access system, where the multi-network access system includes: a plurality of wireless communication networks, and a core network gateway supporting the plurality of wireless communication networks; The plurality of wireless communication networks are connected in parallel, and one end of the plurality of wireless communication networks connected in parallel is connected to the multimode wireless terminal, and the other end is connected to the core network gateway. The service bearer migration method includes: determining The first wireless communication network in the plurality of wireless communication networks initiates a service bearer migration process; and migrates part or all of the service bearers currently performed by the multimode wireless terminal to the plurality of wireless communication networks except the first wireless Other wireless communication networks other than the communication network.

2. The method according to claim 1, wherein the service bearer migration process is implemented by enhancing a cross-system switching process.

The method according to claim 1, wherein the first wireless communication network comprises: a radio access network element, and the service bearer migration process is initiated by the radio access network element.

The method according to claim 3, wherein the radio access network element sends the service bearer migration by sending a handover request message or a relocation request message to a core network element of the first wireless communication network. Process.

The method according to claim 4, wherein the handover request message or the relocation request message carries: a bearer identifier to be migrated on the source side, a target side network element identifier, and a user plane corresponding to the bearer to be migrated Transfer address information.

The method according to claim 5, wherein the handover request message or the relocation request message further carries: differentiated identification information of the migration process.

The method of claim 3, wherein the first wireless communication network further comprises: a core network element, before the service bearer migration process is initiated by the wireless access network element, further comprising: The core network element sends a service bearer migration indication message to the radio access network element to trigger the radio access network element to initiate the service bearer migration process.

The method according to claim 7, wherein the service bearer migration indication message is an interface message or a preset interface message between a core network element and a radio access network element.

The method according to claim 7, wherein the service bearer migration indication message carries at least one of the following: information corresponding to the service bearer to be migrated, and the target side network element identifier.

10. The method according to claim 1, wherein the migrating part or all of the service bearers currently performed by the multi-mode wireless terminal to the other wireless communication network comprises:

The multimode wireless terminal receives a handover command from the first wireless communication network, where the handover command carries the indication that the multimode wireless terminal migrates some or all of the current service bearers to the other wireless Communication network information;

The multimode wireless terminal accesses the other wireless communication network to migrate some or all of the service bearers to the other wireless communication network.

The method according to claim 1, wherein, after migrating part or all of the service bearers currently performed by the multi-mode wireless terminal to the other wireless communication network, the method further includes:

The core network element of the other wireless communication network notifies the core network gateway to modify the bearer information corresponding to the part or all of the service bearers by modifying the bearer process.

The method according to any one of claims 3 to 9, wherein the radio access network element comprises one of the following: a base station subsystem BSS, a radio network subsystem RNS, an evolved base station e B, a wireless local area network WLAN access point.

The method according to any one of claims 7 to 9, wherein the core network element comprises a serving general packet radio service support node SGSN or a mobile switching center MSC; a mobility management entity MME and/or a service Gateway S-GW;

Evolved Packet Data Gateway ePDG.

The method according to any one of claims 1 to 11, wherein the core network gateway comprises the following gateway general packet radio service support node GGSN;

Packet data network gateway P-GW and / or service gateway S-GW.

The method according to any one of claims 1 to 11, wherein the core network gateway is a preset gateway node.

A service bearer migration apparatus, which is applied to a multi-network access system, where the multi-network access system includes: a plurality of wireless communication networks, and a core network gateway supporting the plurality of wireless communication networks; The plurality of wireless communication networks are connected in parallel, and one end of the plurality of wireless communication networks connected in parallel is connected to the multimode wireless terminal, and the other end is connected to the core network gateway; the service bearer migration device includes: a module, configured to determine a first service communication migration process initiated by the first wireless communication network in the multiple wireless communication networks;

And a migration module, configured to migrate part or all of the service bearers currently performed by the multimode wireless terminal to other wireless communication networks of the plurality of wireless communication networks except the first wireless communication network.