WO2012097644A1 - 一种承载处理方法、设备和系统 - Google Patents

一种承载处理方法、设备和系统 Download PDF

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Publication number
WO2012097644A1
WO2012097644A1 PCT/CN2011/083024 CN2011083024W WO2012097644A1 WO 2012097644 A1 WO2012097644 A1 WO 2012097644A1 CN 2011083024 W CN2011083024 W CN 2011083024W WO 2012097644 A1 WO2012097644 A1 WO 2012097644A1
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WIPO (PCT)
Prior art keywords
bearer
transmission path
enb
request message
identifier
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PCT/CN2011/083024
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English (en)
French (fr)
Inventor
郭均祥
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华为技术有限公司
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Publication of WO2012097644A1 publication Critical patent/WO2012097644A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections

Definitions

  • the present invention relates to the field of mobile communications, and in particular, to a bearer processing method, device, and system. Background of the invention
  • one or more transmission paths may exist between an evolved NodeB (eNB) and a serving gateway (Gateway, GW), and a bearer on each transmission path is used to transmit one Or data of multiple User Equipments (UEs).
  • eNB evolved NodeB
  • GW serving gateway
  • UEs User Equipments
  • the Management Entity receives the identity of the bearer of the transmission path that the UE sends to the target eNB, and notifies the serving GW to switch the part of the bearer to the target transmission path. For the bearer corresponding to the bearer identifier of the UE that is not received by the MME, the MME is released. If a partial bearer on one of the transmission paths between one eNB and one GW is switched to another transmission path, the MME also releases the bearer corresponding to the bearer identifier of the UE that is not received, which may result in the UE's Some bearers are improperly released, and the UE's services may be abnormal. Summary of the invention
  • the embodiments of the present invention provide a bearer processing method, device, and system, which can prevent the UE from being abnormally released due to improper release of the bearer of the UE.
  • An aspect of the present invention provides a bearer processing method, including:
  • the MME receives a path switch request message sent by the eNB, where the path switch request message is used to request to switch at least one bearer to the target transmission path;
  • the MME notifies the GW to switch the first part of the bearer to the target transmission path and keep the second part of the bearer in the original transmission path;
  • the first part of the bearer is part or all of the at least one bearer in the handover request message
  • the second part of the bearer is the first part of all bearers of the user equipment UE to which the at least one bearer belongs. Part or all of the external load.
  • Another aspect of the present invention also provides a bearer processing method, including:
  • the eNB sends a path switch request message to the MME, where the path switch request message is used to request to switch at least one bearer to the target transmission path;
  • the eNB switches the first part of the bearer to the target transmission path, and the second part of the bearer is reserved in the original transmission path.
  • the first part of the bearer is part or all of the at least one bearer in the handover request message, and the second Partially carrying part or all of the bearers except the first part of the bearers of the user equipment UE to which the at least one bearer belongs.
  • Another aspect of the present invention also provides an apparatus, including:
  • a receiving unit configured to receive a path switch request message sent by the eNB, where the path switch request message is used to request to switch at least one bearer to the target transmission path;
  • a processing unit configured to notify the GW to switch the first part of the bearer to the target transmission path, and retain the second part of the bearer in the original transmission path, where the first part of the bearer is part of the at least one bearer in the handover request message or All of the second part of the bearer of the user equipment UE to which the at least one bearer belongs is part or all of the bearer except the first part of the bearer.
  • Another aspect of the present invention also provides an apparatus, including:
  • a sending unit configured to send a path switch request message to the MME, where the path switch request message is used to request to switch the at least one bearer to the target transmission path
  • a processing unit configured to switch the first part of the bearer to the target transmission path, and The second part of the bearer is reserved in the original transmission path, where the first part of the bearer is part or all of the at least one bearer in the handover request message, and the second part of the bearer is all of the UE to which the at least one bearer belongs. Part or all of the bearer except the first part of the bearer.
  • Another aspect of the present invention also provides a system, including an eNB, an MME, and a GW, where:
  • the base station eNB is configured to send a path switch request message to the MME, where the path switch request message is used to request to switch at least one bearer to a target transmission path;
  • the MME is configured to receive the path switch request message, and notify the gateway GW to switch the first part of the bearer to the target transmission path, and keep the second part of the bearer in the original transmission path;
  • the GW is configured to switch the first partial bearer to a target transmission path
  • the eNB is further configured to switch the first part of the bearer to the target transmission path, and retain the second part of the bearer in the original transmission path;
  • the first part of the bearer is part or all of the at least one bearer in the handover request message, and the second part of the bearer is the first part of all bearers of the user equipment UE to which the at least one bearer belongs. Part or all of the external load.
  • the method, device, and system provided by the embodiments of the present invention may enable a part of one or more UEs to be handed over by one transmission path between the eNB and the GW to another transmission path between the eNB and the GW, and all The part of the bearer that does not need to switch the transmission path remains in the original transmission path, thereby avoiding the problem that the bearer is improperly released and causing abnormality of the service of the UE, and ensuring the communication quality of the UE.
  • FIG. 2 is a schematic diagram of a transmission path between an eNB and a GW in another embodiment of the present invention
  • FIG. 3 is a schematic diagram of a device according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of a device according to another embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a system according to another embodiment of the present invention. Mode for carrying out the invention
  • the first bearer in the embodiments of the present invention refers to a bearer that needs to switch a transmission path (ie, switches from the original transmission path to the target transmission path). For example, if the eNB determines that one or more bearers need to switch the transmission path, the foregoing one Or multiple bearers are the first bearers.
  • the first bearer may be a bidirectional bearer or a downlink bearer.
  • the address carried on the eNB side and the destination address on the GW side in the embodiments of the present invention include an IP address (Transport Layer Address) of the destination, and may also include a carried tunnel identifier (GTP-TEID) information. .
  • an embodiment of the present invention provides a bearer processing method, including the following steps.
  • Step 110 The eNB sends a path switch request message to the MME, where the path switch request message carries the identifier of the one or more UEs, the identifier of the first bearer of the UE, and the destination address of the first bearer on the eNB side. And indication information, where the indication information is used to indicate whether to release the bearer that the path switch request message does not carry the bearer identifier.
  • the bearer that does not carry the bearer identifier in the path switch request message includes the UE to which the first bearer belongs.
  • the path switch request message does not carry the bearer carrying the identifier.
  • the indication information is a message level parameter, and is valid for all UEs involved in the message carrying the indication information.
  • the indication information is an enumeration type.
  • the enumeration value Non-included E-RABs not Released indicates that the bearer carrying the indication information does not carry the bearer identifier
  • the enumeration value is Non-included E- The RABs Released indicates that the bearer carrying the indication information does not carry the bearer with the bearer identifier.
  • the indication information may also be a Boolean or an integer. For example, True or 1 indicates that the bearer carrying the indication information does not carry the bearer carrying the identifier. If the field of False or 0 or the indication information is empty, the indication is allowed to be released. The message of the information does not carry the bearer carrying the identity.
  • the path switch request message carries an identifier of one or more UEs (eNB UE SlAP ID), an E-RAB To Be Switched corresponding to the identifier of each UE, and indication information.
  • Each bearer list includes an identifier of the bearer of the UE that needs to be switched, and an end address of the bearer on the eNB side, that is, an eNB side end address allocated by the eNB, and the bearer is switched to the target transport path. The destination address on the eNB side.
  • the eNB determines that one or more bearers of a UE need to switch the transmission path, the eNB allocates the destination address of the eNB side for the bearer of the UE that needs to switch the transmission path, and the eNB side end address of the eNB may be allocated for different bearers of the UE. The same or different. If two bearers are assigned different destination addresses on the eNB side, the target transmission paths to which the two bearers are to be switched are different.
  • the identifier of the bearer sent by the eNB is in a one-to-one correspondence with the destination address of the eNB on the sending side, that is, the number of identifiers of the bearer is the same as the number of the destination address.
  • the other bearers of the UE need to remain in the original transmission path, and the eNB does not carry the identifier of the bearer that needs to remain in the original transmission path, and sets the indication information to The indication that the message carrying the indication information is not allowed to be released does not carry the bearer carrying the identifier.
  • the other bearers of the UE need to be released, and the eNB does not carry the identifier of the bearer to be released in the path switch request message, and sets the indication information to indicate that the release is allowed to carry the indication.
  • the message of the information does not carry the bearer carrying the identity.
  • the identifier of the UE may be an identifier of the UE on the eNB side, that is, an identifier allocated by the eNB to the UE and different from other UEs, and the identifier is applicable to the eNB and the MME transmitting information and performing internal processing on the S1 interface.
  • the MME can be used to distinguish the GW. If the MME is also applicable to the GW, the MME can use the identifier to communicate with the GW. Otherwise, the MME can convert the identifier into a GW-recognizable identifier, which is not limited herein.
  • the identifier of the UE is a universal identifier of the UE, that is, not limited to when the eNB and the MME transmit information and perform internal processing on the S1 interface.
  • Step 120 The identifier of the UE that is received by the MME, the identifier of the first bearer of the UE, and the foregoing first bearing
  • the destination address of the eNB is sent to the GW, and it is determined according to the received indication information whether to release the bearer with the bearer identifier.
  • the MME may determine that the eNB is allowed to release the bearer with the bearer identifier. Further, the MME release path switch request message does not carry the bearer carrying the identifier. For another example, if the indication information received by the MME is the enumeration value Non-included E-RABs not Released, the MME may determine that the eNB does not allow the release of the path switch request message that does not carry the bearer identifier. Further, the MME reserves the bearer that the path switch request message does not carry the bearer identifier in the original transport path.
  • the MME may further determine, according to the resource status and the like, whether it is allowed to release the bearer that does not carry the message carrying the indication information, instead of directly obeying the indication of the eNB. If the judgment result of the MME is different from the meaning of the indication information sent by the eNB, the MME may process the bearer with the bearer identifier in the path switch request message according to the judgment result of the MME, that is, the MME uses the indication information sent by the eNB as the trigger itself. The conditions for judgment.
  • the indication information received by the MME indicates that the bearer that is not allowed to be released is the bearer X, the bearer Y, and the bearer Z, but the MME determines that the bearer X can be reserved in the original transmission path, and the bearer Y and the bearer Z need to be released, and the MME will carry the X.
  • the original transmission path is reserved, and a bearer deactivation process is initiated to release the bearer Y and the bearer Z.
  • the MME carries the identifier of the UE, the identifier of the first bearer of the UE, and the destination address of the first bearer on the eNB side in a data plane update request sent to the GW (Modify Bearer). Request) in the message.
  • the destination address carried on the eNB side may occupy the SI eNodeB F-TEID field in the data plane update request message.
  • Step 130 The GW switches the first bearer from the original transmission path to the target transmission path.
  • the GW has saved the original destination address of the first bearer on the eNB side and the GW side. Therefore, the GW may modify the original destination address of the first bearer on the eNB side to the received first bearer.
  • the destination address on the eNB side is assigned a new destination address on the GW side for the first bearer. After the first bearer is switched to the target transport path, the new destination address on the GW side is used.
  • the GW has saved the original destination address of the first bearer on the eNB side, and the original destination address of the uplink bearer corresponding to the first bearer on the GW side. Therefore, the GW may use the first bearer.
  • the original destination address on the eNB side is modified to the destination address of the received first bearer on the eNB side.
  • the GW also switches the uplink bearer corresponding to the first bearer from the original transmission path to the target transmission path, that is, the new destination address of the GW side corresponding to the uplink bearer corresponding to the first bearer, and the uplink corresponding to the first bearer.
  • the new destination address on the GW side above will be used.
  • the GW determines whether the first bearer needs to switch the transmission path according to the received end address of the first bearer on the eNB side, and if yes, redistributes the new destination address on the GW side. . For example, the GW determines that the address segment where the destination address of the first bearer on the eNB side is located is different from the address segment where the original destination address of the first bearer stored on the eNB side of the GW is located, and the GW determines that the first bearer needs to be switched. path.
  • the GW allocates a new destination address of the GW side to the first bearer, and the first bearer switches the transmission path, and the address segment where the new destination address of the GW side is located and the saved GW of the GW The address segment where the original destination address carried on the GW side is located is different.
  • the GW determines that the uplink bearer corresponding to the first bearer also needs to switch the transmission path, and allocates a new destination address of the GW side for the uplink bearer corresponding to the first bearer, so as to be corresponding to the first bearer. After the uplink bearer switches the transmission path, the address segment where the new destination address of the GW side is located is different from the address segment where the original destination address of the GW that is stored on the GW side corresponding to the first bearer.
  • the GW in this step switches the first bearer from the original transmission path to the target transmission path after completing the interaction with the PDN-GW.
  • the interaction between the GW and the PDN-GW includes the GW sending a Data Plane Update Request (Modify Bearer Request) message to the PDN-GW and receiving a Modify Plane Response message sent by the PDN-GW.
  • the GW changes the first bearer that receives the bearer identifier from the original transport path to the target transport path as an example.
  • the GW may also determine (eg, according to resource conditions or other factors). ) Which bearers are allowed to switch the transmission path, and whether the bearer that agrees to switch the transmission path is successfully switched. This step and the subsequent steps describe the case where the GW successfully switches all the first bearers that receive the bearer identifier from the original transport path to the target transport path.
  • the first bearer in steps 110-130 is a bidirectional bearer, Then perform the following steps 140-150. If the first bearer in steps 110-130 is a downlink bearer, steps 140'-150' (not shown in FIG.
  • the GW may send the GW the part of the first bearer to the eNB through the MME. Relevant information, such as the identifier of the bearer, the identifier of the UE to which the bearer belongs, and the new destination address of the GW side allocated by the GW for the bearer, without transmitting the information related to the first bearer that the GW refuses to switch the transmission path or fails to switch the transmission path.
  • the GW may also send information about the part of the first bearer that refuses to switch the transmission path.
  • the identity of the bearer For example, the identity of the bearer, the identity of the UE to which the bearer belongs, and the indication (or cause value) of the failure to switch the transmission path or to switch the transmission path.
  • the identifier of the bearer For another example, the identifier of the bearer, the identifier of the UE to which the bearer belongs, and the original destination address carried on the GW side.
  • the above information can be carried in The data plane update response message sent by the GW to the MME, and the path switch response message sent by the MME to the eNB, to inform the eNB which bearers to switch the transmission path fails.
  • the eNB may switch the part of the first bearer from the original transmission path to the target transmission path, which will not be described later.
  • Steps 140-150 The GW sends, by using the MME, the identifier of the UE, the identifier of the first bearer of the UE, and the destination address of the first bearer on the GW side (that is, the new destination address of the GW side where the GW is the first bearer) To the eNB.
  • the GW carries the identifier of the UE, the identifier of the first bearer of the UE, and the destination address of the first bearer on the GW side in a data plane update response ( Modify Bearer Response) in the message.
  • the destination address of the first bearer on the GW side may occupy the SI SGW F-TEID field in the data plane update response message.
  • the MME carries the identifier of the UE, the identifier of the first bearer of the UE, and the destination address of the first bearer on the GW side in a Path Switch Response message.
  • the GW sets the identifier of the UE by the MME, the identifier of the uplink bearer corresponding to the first bearer of the UE, and the destination address of the uplink corresponding to the first bearer on the GW side (ie, the GW is the first bearer).
  • the assigned new destination address on the GW side is sent to the eNB.
  • the information sent by the GW to the MME may be carried in the data plane update response message, and the information sent by the MME to the eNB may be carried in the path switch response message.
  • Step 160 The eNB switches the first bearer from the original transmission path to the target transmission path.
  • the eNB may modify the original destination address of the first bearer on the eNB side to be the first sent to the MME.
  • the destination address carried on the eNB side is modified, and the original destination address of the first bearer on the GW side is modified to the received destination address of the first bearer on the GW side.
  • the eNB and the GW perform data transmission of the first bearer on the switched transmission path (ie, the target transmission path).
  • the eNB has saved the original destination address of the first bearer on the eNB side, and the original destination address of the uplink bearer corresponding to the first bearer on the GW side. Therefore, the eNB may use the first bearer.
  • the original destination address on the eNB side is modified to be the destination address of the first bearer transmitted to the MME on the eNB side.
  • the eNB also switches the uplink bearer corresponding to the first bearer from the original transmission path to the target transmission path, that is, the original destination address of the uplink bearer corresponding to the first bearer on the GW side is modified to be received and A bearer address carrying the corresponding uplink bearer on the GW side.
  • the eNB and the GW After the eNB completes the transmission path of the first bearer and the uplink bearer corresponding to the first bearer, the eNB and the GW perform the first bearer and the first bearer on the switched transmission path.
  • the data transmission should be carried on the upstream.
  • all or part of the bearers of one or more UEs may be switched by one transmission path between the eNB and the GW to another transmission path between the eNB and the GW, and all or part of the handover is not required to be switched.
  • the bearer of the transmission path is reserved in the original transmission path, so as to avoid the problem that the bearer is improperly released and the service of the UE is abnormal, and the communication quality of the UE is guaranteed.
  • a bearer processing method provided by another embodiment of the present invention includes steps 210-260.
  • the steps 210-220 are different from the steps 110-120 in the foregoing embodiment, and the descriptions of the options and examples of other steps may be referred to the foregoing embodiment, and details are not described herein again.
  • the differences between steps 210-220 and steps 110-120 of this embodiment are described in detail below.
  • the eNB sends a path switch request message, where the path switch request message carries the identifier of the one or more UEs, the identifier of the first bearer of the UE, and the destination address of the first bearer on the eNB side. And at least one indication information, where the first bearer refers to a bearer that needs to switch a transmission path, and each indication information corresponds to an identifier of one UE, and is used to indicate whether to release all bearers belonging to the UE corresponding to the indication information.
  • the path switch request message does not carry the bearer carrying the identifier.
  • the indication information in this embodiment is a UE-level parameter, that is, only valid for the UE corresponding to the indication information.
  • an indication message is carried in an information element corresponding to the identity of the UE.
  • the indication information may be the default value, that is, the bearer indication information is allowed (or not allowed) to release all the bearers of the UE by default.
  • the information type of the indication information in this step may be multiple.
  • the first bearer may be a bidirectional bearer or a downlink bearer, and details are not described herein.
  • the MME sends the identifier of the received UE, the identifier of the first bearer of the UE, and the destination address of the first bearer on the eNB side to the GW, and determines whether to release according to the received indication information.
  • the path switch request message does not carry the bearer carrying the identifier.
  • the MME determines, according to the information about the resource status, whether the message carrying the indication information does not carry the bearer with the bearer identifier, instead of directly obeying the indication of the eNB.
  • the identifier of the UE that is sent by the eNB includes the identifier of the UE1 and the identifier of the UE2, and the eNB sends two indication information, where the indication information corresponding to the UE1 indicates that all bearers in the UE are allowed to be released, and the path switch request is The message does not carry the bearer carrying the identifier, and the indication information corresponding to the UE2 indicates that the bearer that does not carry the bearer identifier in the path switch request is not allowed to be released.
  • the MME determines that all the bearers of UE1 are released, and the path switch request message does not carry the bearer of the bearer identifier, and does not release the bearer of the bearer identifier in the path switch request message.
  • all or part of the bearers of one or more UEs may be switched by one transmission path between the eNB and the GW to another transmission path between the eNB and the GW, and all or part of the handover is not required to be switched.
  • the bearer of the transmission path is reserved in the original transmission path, so as to avoid the problem that the bearer is improperly released and the service of the UE is abnormal, and the communication quality of the UE is guaranteed.
  • a processing bearer processing method provided by another embodiment of the present invention includes steps 310-360.
  • the steps 310-320 are different from the steps 310-320 in the foregoing embodiment.
  • the differences between steps 310-320 and steps 110-120 of this embodiment are described in detail below.
  • the eNB sends a path switch request message, where the path switch request message carries the identifier of the one or more UEs, the identifier of the first bearer of the UE, and the destination address of the first bearer on the eNB side.
  • the identifier of the second bearer of the UE and the at least one indication information where the first bearer is a bearer that needs to switch the transmission path, and the second bearer is a bearer that does not need to switch the transmission path and is not allowed to be released, and each indication information and one Corresponding to the identifier of the two bearers, it is used to indicate that the bearer corresponding to the indication information is not allowed to be released.
  • the indication information in this embodiment is a bearer level parameter, that is, only valid for the bearer corresponding to the indication information.
  • an indication information is carried in an information element corresponding to the identity of a second bearer, indicating that the bearer is not allowed to be released.
  • the eNB may further send indication information corresponding to the third bearer, Used to indicate that the bearer is allowed to be released.
  • the information in this step can be used in multiple types.
  • the first bearer may be a bidirectional bearer or a downlink bearer, and is not described here.
  • the MME sends the identifier of the received UE, the identifier of the first bearer of the UE, and the destination address of the first bearer on the eNB side to the GW, and determines which ones are based on the received indication information.
  • the bearer remains in the original transmission path (eg, the second bearer corresponding to the indication information), and which bearers are released (eg, the third bearer corresponding to the indication information).
  • the MME determines, according to the resource status and the like, whether it allows to keep a bearer in the original transmission path, or releases a bearer instead of directly obeying the indication of the eNB.
  • the identifier of the bearer sent by the eNB includes: an identifier of the bearer M, the bearer N, and the bearer P.
  • the bearer M is the first bearer, and the eNB does not send the indication information corresponding to the bearer M.
  • the bearer N is the second bearer, and the eNB sends indication information corresponding to the bearer N, where the indication information indicates that the bearer N is not allowed to be released.
  • the bearer P is a third bearer, and the eNB sends indication information corresponding to the bearer P, where the indication information indicates that the bearer P is allowed to be released.
  • step 320 the MME sends the identifier of the UE to which the M bearer belongs, the identifier of the bearer M, and the destination address of the bearer M on the eNB side to the GW, does not release the bearer N, and retains the bearer N in the original transmission. Pass the path and release the bearer P.
  • all or part of the bearers of one or more UEs may be switched by one transmission path between the eNB and the GW to another transmission path between the eNB and the GW, and all or part of the handover is not required to be switched.
  • the bearer of the transmission path is reserved in the original transmission path, so as to avoid the problem that the bearer is improperly released and the service of the UE is abnormal, and the communication quality of the UE is guaranteed.
  • the foregoing embodiments of the present invention are applicable to a scenario in which a part of a transmission path between an eNB and a GW is disconnected or congested, and is also applicable to a scenario in which a transmission path between an eNB and a GW differs in reliability or QoS guarantee.
  • the N transmission paths between the eNB and the GW as an example, if the eNB determines that one of the transmission paths is about to be broken, the method provided in the foregoing embodiment may be used to carry all the UEs on the transmission path that is about to be disconnected. Switch to another transmission path.
  • the method provided in the foregoing embodiment may be used to switch part of the bearer on the congested transmission path to another transmission path.
  • the method provided in the foregoing embodiment may be used to ensure the reliability. Partial bearers on the lower transmission path (or QoS guarantee) switch to other transmission paths.
  • the foregoing part of the bearer may be all bearers or part of bearers of a certain UE on the transmission path, such as a bearer with a higher priority, or all bearers or partial bearers of some UEs on the transport path where the congestion occurs.
  • the three IP addresses configured in the eNB are 10.10.10.1, 10.10.11.1, and 10.10.12.1, respectively, and the three IP addresses configured in the GW are 10.10.10.2, 10.10.11.2, and 10.10, respectively. .12.2, and the transport addresses 10.10.10.1 and 10.10.10.2 form the transport path A, the transport addresses 10.10.11.1 and 10.10.11.2 form the transport path B, and the transport addresses 10.10.12.1 and 10.10.12.2 form the transport path C.
  • the transmission path A is about to be broken for some reason, the bearers of all the UEs on the transmission path A are switched to the transmission path B.
  • all bearers or partial bearers in the bearers of one or more UEs on the transmission path A are switched to the transmission path B or C, for example, all bearers of the UE1 and/or part of the bearers of the UE2 are switched to The path B is transmitted, thereby reducing the degree of congestion of the transmission path A or causing the transmission path A to no longer be congested.
  • all bearers or partial bearers in the bearers of one or more UEs on the transmission path A are switched to the transmission path B, for example, all bearers of the UE1 and The partial bearer of the UE2 is switched to the transmission path B, so as to better guarantee the communication quality of the UE corresponding to the handover bearer.
  • another embodiment of the present invention further provides an apparatus, where the apparatus 300 includes: a receiving unit 310, configured to receive a path switch request message sent by a base station eNB, where the path switch request message is used to request at least Switching a bearer to a target transmission path;
  • the processing unit 330 is configured to notify the GW to switch the first part of the bearer to the target transmission path, and retain the second part of the bearer in the original transmission path, where the first part of the bearer is part or all of the at least one bearer in the handover request message, The second part of the bearer is part or all of the bearers except the first part of the bearers of the user equipment UE to which the at least one bearer belongs.
  • the processing unit is configured to send, to the GW, the identifier of the first part, the identifier of the UE to which the first part of the bearer belongs, and the destination address of the first part that is carried on the eNB side.
  • the receiving unit is further configured to receive, by the GW, a first part of the end address that is sent by the GW, and the processing unit is further configured to carry the first part of the end address of the GW side.
  • the eNB is sent to the eNB to enable the eNB to switch the first part of the bearer to the target transmission path, and the first part carries the destination address of the GW side.
  • the receiving unit is further configured to receive, by the GW, an end address of the uplink bearer corresponding to the first part of the bearer on the GW side, where the processing unit is further configured to use the uplink corresponding to the first part of the bearer
  • the destination address that is carried on the GW side is sent to the eNB, so that the eNB switches the uplink bearer corresponding to the first part of the bearer to the destination transmission path, and adopts the uplink address of the uplink bearer on the GW side corresponding to the first part of the bearer.
  • the device provided in this embodiment may be an MME, and may also be used to implement the method provided by the embodiments of the present invention.
  • the device provided in this embodiment may enable all or part of the bearer of one or more UEs to be switched by one transmission path between the eNB and the GW to another transmission path between the eNB and the GW, and all or part of the carrier is not required.
  • the bearer of the handover transmission path is reserved in the original transmission path, so as to avoid the problem that the bearer is improperly released and the service of the UE is abnormal, and the communication quality of the UE is guaranteed.
  • another embodiment of the present invention further provides an apparatus, where the apparatus 400 includes: a sending unit 410, configured to send a path switch request message to a mobility management entity MME, where the path switch request message is used to request Switching at least one bearer to a target transmission path;
  • a sending unit 410 configured to send a path switch request message to a mobility management entity MME, where the path switch request message is used to request Switching at least one bearer to a target transmission path;
  • the processing unit 430 is configured to switch the first part of the bearer to the target transmission path, and retain the second part of the bearer in the original transmission path, where the first part of the bearer is part or all of the at least one bearer in the handover request message,
  • the part of the bearer is part or all of the bearers except the first part of the bearers of the user equipment UE to which the at least one bearer belongs.
  • the path switch request message further carries indication information, where the indication information is used to indicate that the second part of the bearer is not allowed to be released.
  • the processing unit is specifically configured to receive, send by the MME.
  • the first part carries the end address of the GW side, and switches the first part of the bearer to the target transmission path, where the first part carries the end point address carried by the first part on the GW side and the end point address of the first part carried on the apparatus side
  • the processing unit is specifically configured to receive, send by the MME.
  • the first part carries the end address of the GW side, and switches the first part of the bearer to the target transmission path, where the first part carries the end point address carried by the first part on the GW side and the end point address of the first part carried on the apparatus side
  • the processing unit is further configured to receive, by the MME, an end address of the uplink bearer corresponding to the first part of the bearer on the GW side, and switch the uplink bearer corresponding to the first part of the bearer to the target transport path.
  • the uplink bearer corresponding to the first part of the bearer carries the end address of the uplink carried on the GW side corresponding to the bearer of the first part.
  • the device provided in this embodiment may be an eNB, and may be used to implement the steps performed by the eNB in the method provided by the embodiments of the present invention. For the specific implementation, refer to the description of the method provided in the foregoing embodiment, and details are not described herein again.
  • the device provided in this embodiment may enable all or part of the bearer of one or more UEs to be switched by one transmission path between the eNB and the GW to another transmission path between the eNB and the GW, and all or part of the carrier is not required.
  • the bearer of the handover transmission path is reserved in the original transmission path, so as to avoid the problem that the bearer is improperly released and the service of the UE is abnormal, and the communication quality of the UE is guaranteed.
  • another embodiment of the present invention further provides a system including an eNB 510, an MME 530, and a GW 550, where:
  • the eNB 510 is configured to send a path switch request message to the MME, where the path switch request message is used to request to switch at least one bearer to a target transmission path;
  • the foregoing MME 530 is configured to receive the path switching request message, and notify the gateway GW to switch the first part of the bearer to the target transmission path, and keep the second part of the bearer in the original transmission path;
  • the GW 550 is configured to switch the first part of the bearer to the target transmission path
  • the eNB 510 is further configured to switch the first part of the bearer to the target transmission path, and retain the second part of the bearer in the original transmission path;
  • the first part of the bearer is part or all of the at least one bearer in the handover request message
  • the second part of the bearer is part of all bearers except the first part of the bearer of the user equipment UE to which the at least one bearer belongs. Or all.
  • the system provided by this embodiment may enable all or part of one or more UEs to be handed over by one transmission path between the eNB and the GW to another transmission path between the eNB and the GW, and all or part of the carrier is not required.
  • the bearer of the handover transmission path remains in the original transmission path, thereby avoiding the problem that the bearer is improperly released and causing abnormality of the service of the UE, and ensuring the communication quality of the UE.
  • an embodiment of the present invention provides a method that, optionally, can be accomplished by a program instructing associated hardware.
  • the method includes: the MME receiving a path switch request message sent by the eNB, where the path switch request message is used to request to switch the at least one bearer to the target transmission path; the MME notifying the GW to switch the first part of the bearer to the target transmission path, and the second part
  • the bearer is reserved in the original transmission path, where the first part of the bearer is part or all of the at least one bearer in the handover request message, and the second part of the bearer is the first part of all bearers of the user equipment UE to which the at least one bearer belongs. Some or all of the bearers outside.
  • the path switching request message carries the identifier of the at least one bearer and the identifier of the UE to which the at least one bearer belongs, where the at least one bearer belongs to one UE, or the at least one bearer is multiple bearers, The bearer belongs to multiple UEs.
  • the path switching request message further carries indication information, where the indication information is used to indicate that the second part of the bearer is not allowed to be released.
  • the foregoing MME notifying the GW to switch the first part of the bearer to the target transmission path includes: sending, by the MME, the identifier of the first part of the bearer, the identifier of the UE to which the first part of the bearer belongs, and the destination address of the first part that is carried on the eNB side to GW.
  • the method provided by the embodiment further includes: the MME receiving the first part of the GW to send the end address of the GW side; and the MME sending the end part of the first part of the GW side to the GW side
  • the eNB when the eNB switches the first part of the bearer to the target transmission path, adopts the first part of the destination address carried on the GW side.
  • the first part of the first part of the bearer address that is carried on the GW side is that the GW determines that the first part of the bearer needs to switch the transmission path according to the received first part of the end point address that is carried on the eNB side, and is allocated for the first part of the bearer.
  • the method provided by the embodiment further includes: the MME receiving the end address of the uplink bearer corresponding to the first part of the bearer sent by the GW on the GW side; and the MME carrying the uplink corresponding to the first part of the bearer in the GW
  • the destination address of the eNB is sent to the eNB, so that the eNB switches the destination bearer corresponding to the first part of the bearer to the destination address of the GW side corresponding to the first part of the bearer.
  • the foregoing end address of the uplink bearer corresponding to the first part bearer on the GW side is the foregoing And determining, by the GW, that the first part of the bearer and the uplink bearer corresponding to the first part of the bearer need to switch the transmission path according to the received first part of the terminal address that is carried on the eNB side, and the GW is allocated for the uplink bearer corresponding to the first part of the bearer.
  • a method provided by an embodiment of the present invention may optionally be performed by a program to instruct related hardware.
  • the method includes: the base station eNB sends a path switch request message to the MME, where the path switch request message is used to request to switch at least one bearer to the target transmission path; the eNB switches the first part of the bearer to the target transmission path, and the second part of the bearer is reserved.
  • the first part of the bearer is part or all of the at least one bearer in the handover request message
  • the second part of the bearer is other than the first part of the bearer of the user equipment UE to which the at least one bearer belongs. Part or all of the bearer.
  • the path switching request message carries the identifier of the at least one bearer and the identifier of the UE to which the at least one bearer belongs, where the at least one bearer belongs to one UE, or the at least one bearer is multiple bearers, The bearer belongs to multiple UEs.
  • the path switch request message further carries indication information, where the indication information is used to indicate that the second part of the bearer is not allowed to be released.
  • the foregoing eNB switching the first part of the bearer to the target transmission path includes: receiving, by the eNB, a first part of the end address that is sent by the MME on the GW side; and the eNB switching the first part of the bearer to the first part of the bearer
  • the target transmission path, the first part of the bearer adopts the end point address carried by the first part on the GW side and the end point address carried by the first part on the eNB side.
  • the method provided by the embodiment further includes: the eNB receiving, by the MME, an end address of the uplink bearer corresponding to the first part of the bearer on the GW side; the foregoing eNB corresponding to the first part of the bearer
  • the uplink bearer is switched to the target transmission path, and the uplink bearer corresponding to the first part of the bearer carries the end address of the uplink carried on the GW side corresponding to the first bearer.
  • the path switching request message carries the indication information in the device, the system, and the method provided in the foregoing embodiment, where the indication information is used to indicate that the second part of the bearer is not allowed to be released.
  • the indication information carried in the path switch request message is used to indicate that the bearer that does not carry the bearer identifier is not allowed to be released, that is, the second part of the bearer includes the bearer that does not carry the bearer identifier in the path switch request message.
  • the indication information carried in the path switching request message is associated with the identifier of the one UE, and is used to indicate that the bearer that does not carry the bearer identifier is not allowed to be released.
  • the bearer of one UE that is, the second part of the bearer includes the bearer belonging to the one UE in the bearer that does not carry the bearer identifier.
  • the at least one carrier is a plurality of carriers
  • At least one of the indication information carried in the path switching request message corresponds to the identifier of one of the plurality of UEs, and is used to indicate that the path is not allowed to be released.
  • the handover request message does not carry the bearer of the UE corresponding to the foregoing indication information in the bearer that carries the identifier, that is, the second part of the bearer includes the bearer belonging to the second part of the UE that does not carry the bearer identifier in the path switch request message.
  • the indication information corresponding to the second part of the UE indicates that the bearer of the UE that belongs to the UE corresponding to the indication information that is not carrying the bearer identifier is not allowed to be released.
  • the path switching request message further carries the identifier of the second part, and the at least one indication information carried in the path switching request message corresponds to the identifier of one of the second part of the bearer, and is used for The indication does not allow release of the bearer corresponding to the above indication information.
  • the computer readable storage medium may be a magnetic disk, a optical disk, a read-only memory (ROM), or a random access memory (RAM).

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Description

一种承载处理方法、 设备和系统
本申请要求于 2010年 1月 22日提交中国专利局、 申请号为 CN201110024405.5、 发明名称为 "一种承载处理方法、 设备和系统"的中国专利申请的优先权， 其全部内容 通过引用结合在本申请中。 技术领域
本发明涉及移动通信领域， 特别是涉及一种承载处理方法、 设备和系统。 发明背景
长期演进（Long Term Evolution, LTE)系统中， 演进基站 （ evolved NodeB， eNB) 与服务网关（Gateway, GW)之间可能存在一个或多个传输路径， 每个传输路径上的承 载用于传输一个或多个用户设备 （User Equipment, UE) 的数据。
一个 UE由源 eNB切换至目标 eNB的过程中， 如果移动管理实体 （Mobility
Management Entity, MME) 接收到目标 eNB发送的该 UE需要切换传输路径的承载的标 识， 则通知服务 GW将这部分承载切换至目标传输路径。 对于 MME没有接收到的该 UE 的承载标识所对应的承载， MME会释放掉。 如果将一个 eNB和一个 GW之间的某一个传 输路径上的部分承载切换至另一个传输路径， MME也会释放掉没有接收到的该 UE的承 载标识所对应的承载， 这就可能导致 UE的某些承载被不恰当的释放， 该 UE的业务可能 出现异常。 发明内容
本发明实施例提供一种承载处理方法、 设备和系统， 可以避免 UE的承载被不恰当 的释放而导致该 UE的业务出现异常的问题。
本发明的一方面提供一种承载处理方法， 包括：
MME接收 eNB发送的路径切换请求消息， 所述路径切换请求消息用于请求将至少 一个承载切换至目标传输路径；
MME通知 GW将第一部分承载切换至目标传输路径，并将第二部分承载保留在原传 输路径；
其中， 所述第一部分承载为所述切换请求消息中所述至少一个承载的部分或全部， 所述第二部分承载为所述至少一个承载所属的用户设备 UE的所有承载中除第一部分承 载之外的承载的部分或全部。 本发明的另一方面还提供一种承载处理方法， 包括：
eNB发送路径切换请求消息给 MME， 所述路径切换请求消息用于请求将至少一个 承载切换至目标传输路径；
eNB将第一部分承载切换至目标传输路径， 并将第二部分承载保留在原传输路径； 其中， 所述第一部分承载为所述切换请求消息中所述至少一个承载的部分或全部， 所述第二部分承载为所述至少一个承载所属的用户设备 UE的所有承载中除第一部分承 载之外的承载的部分或全部。
本发明的另一方面还提供一种设备， 包括：
接收单元， 用于接收 eNB发送的路径切换请求消息， 所述路径切换请求消息用于请 求将至少一个承载切换至目标传输路径； 及
处理单元， 用于通知 GW将第一部分承载切换至目标传输路径， 并将第二部分承载 保留在原传输路径； 其中， 所述第一部分承载为所述切换请求消息中所述至少一个承载 的部分或全部， 所述第二部分承载为所述至少一个承载所属的用户设备 UE的所有承载 中除第一部分承载之外的承载的部分或全部。
本发明的另一方面还提供一种设备， 包括：
发送单元， 用于发送路径切换请求消息给 MME, 所述路径切换请求消息用于请求 将至少一个承载切换至目标传输路径； 及 处理单元，用于将第一部分承载切换至目标传输路径， 并将第二部分承载保留在原 传输路径； 其中， 所述第一部分承载为所述切换请求消息中所述至少一个承载的部分或 全部， 所述第二部分承载为所述至少一个承载所属的 UE的所有承载中除第一部分承载 之外的承载的部分或全部。
本发明的另一方面还提供一种系统， 包括 eNB， MME和 GW， 其中：
所述基站 eNB用于向所述 MME发送路径切换请求消息， 所述路径切换请求消息用 于请求将至少一个承载切换至目标传输路径；
所述 MME用于接收所述路径切换请求消息，并通知网关 GW将第一部分承载切换至 目标传输路径， 并将第二部分承载保留在原传输路径；
所述 GW用于将所述第一部分承载切换至目标传输路径；
所述 eNB还用于将所述第一部分承载切换至目标传输路径， 并将第二部分承载保留 在原传输路径； 其中， 所述第一部分承载为所述切换请求消息中所述至少一个承载的部分或全部， 所述第二部分承载为所述至少一个承载所属的用户设备 UE的所有承载中除第一部分承 载之外的承载的部分或全部。
本发明实施例提供的方法、 设备和系统， 可以使一个或多个 UE的部分承载由 eNB 与 GW之间的一个传输路径切换至该 eNB与该 GW之间的另一个传输路径，并将全部或部 分不需要切换传输路径的承载保留在原传输路径， 从而避免承载被不恰当地释放导致 UE的业务出现异常的问题， 保证 UE的通信质量。 附图简要说明
图 1为本发明的一个实施例提供的方法流程图；
图 2为本发明的另一个实施例中的 eNB与 GW之间的传输路径示意图；
图 3为本发明的一个实施例提供的设备示意图；
图 4为本发明的另一个实施例提供的设备示意图；
图 5为本发明的另一个实施例提供的系统示意图。 实施本发明的方式
下面将结合本发明实施例中的附图， 对本发明实施例中的技术方案进行清楚、 完整 地描述， 显然， 所描述的实施例仅是本发明的一部分实施例， 而不是全部的实施例。 基 于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有 其他实施例， 都属于本发明保护的范围。
在本发明各实施例中的第一承载是指需要切换传输路径（即从原传输路径切换到目 标传输路径） 的承载， 例如， eNB确定某一个或多个承载需要切换传输路径， 则上述一 个或多个承载为第一承载。 可选的， 第一承载可以为双向承载， 也可以为下行承载。 此 夕卜， 本发明的各实施例中的承载在 eNB侧的地址和在 GW侧的终点地址包括该终点的 IP地址 （Transport Layer Address), 还可以包括承载的隧道标识 （GTP-TEID) 信息。
如图 1所示， 本发明的一个实施例提供一种承载处理方法， 包括如下步骤。
步骤 110、 eNB向 MME发送路径切换请求 （Path Switch Request) 消息， 该路径切 换请求消息携带一个或多个 UE的标识， 上述 UE的第一承载的标识、 上述第一承载在 eNB侧的终点地址， 以及指示信息， 该指示信息用于指示是否允许释放该路径切换请求 消息未携带承载标识的承载。
本步骤中， 该路径切换请求消息未携带承载标识的承载包括第一承载所属的 UE的 所有承载中、 该路径切换请求消息未携带承载标识的承载。 也即该指示信息为消息级参 数， 对携带该指示信息的消息涉及的所有 UE有效。 可选的， 该指示信息为枚举型， 例 如，枚举值 Non-included E-RABs not Released表示不允许释放携带该指示信息的消息未 携带承载标识的承载， 枚举值 Non-included E-RABs Released表示允许释放携带该指示 信息的消息未携带承载标识的承载。 指示信息也可以为布尔型或整型， 例如 True或 1 表示不允许释放携带该指示信息的消息未携带承载标识的承载， False或 0或者指示信 息的字段为空， 则表示允许释放携带该指示信息的消息未携带承载标识的承载。
可选的， 路径切换请求消息携带一个或多个 UE的标识 （eNB UE SlAP ID), 每个 UE的标识对应的承载列表 （E-RAB To Be Switched), 以及指示信息。 其中， 每个承载 列表包括该 UE的需要切换传输路径的承载的标识和上述承载在 eNB侧的终点地址，即 eNB为上述承载分配的 eNB侧的终点地址，上述承载切换至目标传输路径时采用该 eNB 侧的终点地址。
假设 eNB确定一个 UE的一个或多个承载需要切换传输路径， 则 eNB为该 UE的 需要切换传输路径的承载分配 eNB侧的终点地址， eNB为该 UE的不同承载分配的 eNB 侧的终点地址可能相同， 也可能不同。 如果两个承载被分配了不同 eNB侧的终点地址， 则这两个承载要切换到的目标传输路径是不同的。可选的， eNB发送的承载的标识与发 送的 eNB 侧的终点地址为一一对应的关系， 即承载的标识的数量与终点地址的数量相 同。
假设除上述需要切换传输路径的承载之外， 上述 UE的其他承载都需要保留在原传 输路径， 则 eNB在路径切换请求消息不携带这些需要保留在原传输路径的承载的标识， 且将指示信息设置为指示不允许释放携带该指示信息的消息未携带承载标识的承载。
假设除上述需要切换传输路径的承载之外，上述 UE的其他承载都需要释放，则 eNB 在路径切换请求消息不携带这些需要释放的承载的标识， 且将指示信息设置为指示允许 释放携带该指示信息的消息未携带承载标识的承载。
本步骤中， UE的标识可以是 UE在 eNB侧的标识， 也即 eNB为该 UE分配的、 且 与其他 UE相区别的标识， 该标识适用于 eNB与 MME在 S1接口传输信息和做内部处 理时区分 UE， 如果该标识也适用于 GW， 则 MME可以采用该标识与 GW通信， 否则， MME可以将该标识转换为 GW可识别的标识， 此处不作限定。 或者， 该 UE的标识是 UE的通用标识， 即不限于 eNB与 MME在 S1接口传输信息和做内部处理时使用。
步骤 120、 MME将接收到的 UE的标识、 上述 UE的第一承载的标识和上述第一承 载在 eNB侧的终点地址发送给 GW，并根据接收到的指示信息确定是否释放路径切换请 求消息未携带承载标识的承载。
例如， MME接收到的指示信息为枚举值 Non-included E-RABs Released, 则 MME 可以确定 eNB允许释放路径切换请求消息未携带承载标识的承载。 进一步的， MME释 放路径切换请求消息未携带承载标识的承载。 又如， MME接收到的指示信息为枚举值 Non-included E-RABs not Released, 则 MME可以确定 eNB不允许释放路径切换请求消 息未携带承载标识的承载。 进一步的， MME将路径切换请求消息未携带承载标识的承 载保留在原传输路径。
本步骤中， MME还可能根据资源状况等信息判断自身是否允许释放携带该指示信 息的消息未携带的承载， 而不是直接听从 eNB的指示。 如果 MME的判断结果与 eNB 发送的指示信息的含义不同， MME可以按照自身的判断结果对路径切换请求消息未携 带承载标识的承载做处理， 也就是说， MME将 eNB发送的指示信息作为触发自身判断 的条件。 例如， MME接收到的指示信息指示不允许释放的承载为承载 X、 承载 Y和承 载 Z， 但 MME判断可以将承载 X保留在原传输路径， 而承载 Y和承载 Z需要释放， 则 MME将承载 X保留在原传输路径， 并发起承载去激活过程以释放承载 Y和承载 Z。
可选的， 如图 1步骤 120所示， MME将 UE的标识、 上述 UE的第一承载的标识 和上述第一承载在 eNB侧的终点地址携带在发送给 GW的数据平面更新请求 （Modify Bearer Request) 消息中。 例如， 承载在 eNB侧的终点地址可以占用该数据平面更新请 求消息中的 SI eNodeB F-TEID字段。
步骤 130、 GW将上述第一承载从原传输路径切换至目标传输路径。
如果第一承载为双向承载， 则 GW已保存了第一承载在 eNB侧和 GW侧的原终点 地址， 因此， GW可以将第一承载在 eNB侧的原终点地址修改为接收到的第一承载在 eNB侧的终点地址，并为第一承载分配 GW侧的新终点地址，第一承载切换至目标传输 路径后， 将采用上述 GW侧的新终点地址。
如果第一承载为下行承载， 则 GW已保存了第一承载在 eNB侧的原终点地址， 以 及与该第一承载相应的上行承载在 GW侧的原终点地址， 因此， GW可以将第一承载在 eNB侧的原终点地址修改为接收到的第一承载在 eNB侧的终点地址。 GW还在本步骤 中将与第一承载相应的上行承载从原传输路径切换至目标传输路径， 即为与第一承载相 应的上行承载分配 GW侧的新终点地址，与第一承载相应的上行承载切换至目标传输路 径后， 将采用上述 GW侧的新终点地址。 可选的， GW在分配 GW侧的新终点地址之前， 先根据接收到的第一承载在 eNB 侧的终点地址确定第一承载是否需要切换传输路径， 如果是， 再分配 GW侧的新终点地 址。 例如， GW判断接收到的第一承载在 eNB侧的终点地址所在的地址段与 GW已保 存的第一承载在 eNB侧的原终点地址所在的地址段不同， 则 GW确定第一承载需要切 换传输路径。 如果第一承载为双向承载， 则 GW为第一承载分配 GW侧的新终点地址， 以供第一承载切换传输路径后采用， 该 GW侧的新终点地址所在的地址段与 GW已保 存的第一承载在 GW侧的原终点地址所在的地址段不同。如果第一承载为下行承载， 则 GW确定与第一承载相应的上行承载也需要切换传输路径， 并为与第一承载相应的上行 承载分配 GW侧的新终点地址， 以供与第一承载相应的上行承载切换传输路径后采用， 该 GW侧的新终点地址所在的地址段与 GW已保存的与第一承载相应的上行承载在 GW 侧的原终点地址所在的地址段不同。
本领域技术人员可以理解的， 本步骤中的 GW在完成与 PDN-GW的交互后， 将第 一承载从原传输路径切换至目标传输路径。 其中， GW与 PDN-GW的交互包括 GW向 PDN-GW发送数据平面更新请求（Modify Bearer Request)消息和接收 PDN-GW发送的 数据平面更新响应 （Modify Bearer Response) 消息， 上述过程可参见现有技术， 此处不 再赘述。
需要说明的是，本实施例以 GW将接收到承载标识的第一承载从原传输路径切换至 目标传输路径为例进行说明， 实际上， GW也可以判断 （例如根据资源情况或其他因素 进行判断） 同意哪些承载切换传输路径， 以及同意切换传输路径的承载是否切换成功。 本步骤和后续步骤对 GW成功将所有接收到承载标识的第一承载从原传输路径切换至 目标传输路径的情况作详细说明， 进一步的， 如果步骤 110-130中的第一承载为双向承 载， 则执行下述步骤 140-150。 如果步骤 110-130中的第一承载为下行承载， 则执行步 骤 140'-150' (图 1未示出）。 如果 GW同意将部分第一承载从原传输路径切换至目标传 输路径， 或者 GW成功将部分第一承载从原传输路径切换至目标传输路径， 则 GW可 以通过 MME向 eNB发送 GW上述部分第一承载相关的信息， 例如承载的标识、 承载 所属的 UE的标识和 GW为该承载分配的 GW侧的新终点地址， 而不发送 GW拒绝切 换传输路径或切换传输路径失败的第一承载相关的信息。 当然， GW也可以发送拒绝切 换传输路径的那部分第一承载相关的信息。例如， 承载的标识、承载所属的 UE的标识， 以及， 拒绝切换传输路径或切换传输路径失败的指示 （或原因值）。 又如， 承载的标识、 承载所属的 UE 的标识和承载在 GW侧的原终点地址。 可选的， 上述信息可以携带在 GW发送给 MME的数据平面更新响应消息， 以及 MME发送给 eNB的路径切换响应消 息中， 以通知 eNB哪些承载切换传输路径失败。 在 GW成功切换部分第一承载的情况 下， eNB可以将这部分第一承载从原传输路径切换至目标传输路径， 后文不再赘述。
步骤 140-150、 GW通过 MME将 UE的标识， 上述 UE的第一承载的标识， 和上述 第一承载在 GW侧的终点地址 （即 GW为第一承载分配的 GW侧的新终点地址） 发送 给 eNB。
可选的， 如图 1中的步骤 140-150所示， GW将上述 UE的标识， 上述 UE的第一 承载的标识， 上述该第一承载在 GW侧的终点地址携带在数据平面更新响应 （Modify Bearer Response) 消息中。 可选的， 该第一承载在 GW侧的终点地址可以占用该数据平 面更新响应消息中的 SI SGW F-TEID字段。 MME将上述 UE的标识， 上述 UE的第一 承载的标识， 和上述第一承载在 GW侧的终点地址携带在路径切换响应 （Path Switch Response) 消息中。
步骤 140'-150'、 GW通过 MME将 UE的标识， 上述 UE的第一承载相应的上行承 载的标识， 和上述第一承载相应的上行承载在 GW侧的终点地址 （即 GW为第一承载 分配的 GW侧的新终点地址）发送给 eNB。 可选的， GW发送给 MME的信息可以携带 在数据平面更新响应消息中， MME发送给 eNB的信息可以携带在路径切换响应消息中。
步骤 160、 eNB将第一承载从原传输路径切换至目标传输路径。
如果第一承载为双向承载， 则 eNB已保存了第一承载在 eNB侧和 GW侧的原终点 地址， 因此， eNB可以将第一承载在 eNB侧的原终点地址修改为发送给 MME的第一 承载在 eNB侧的终点地址， 并将第一承载在 GW侧的原终点地址修改为接收到的第一 承载在 GW侧的终点地址。进一步的， eNB将第一承载从原传输路径切换至目标传输路 径之后， eNB与 GW在切换后的传输路径（即上述目标传输路径）上进行第一承载的数 据传输。
如果第一承载为下行承载， 则 eNB已保存了第一承载在 eNB侧的原终点地址， 以 及与该第一承载相应的上行承载在 GW侧的原终点地址， 因此， eNB可以将第一承载在 eNB侧的原终点地址修改为发送给 MME的第一承载在 eNB侧的终点地址。 eNB还在 本步骤中将与第一承载相应的上行承载从原传输路径切换至目标传输路径， 即： 将与第 一承载相应的上行承载在 GW侧的原终点地址修改为接收到的与第一承载相应的上行 承载在 GW侧的终点地址。进一步的， eNB完成第一承载和与第一承载相应的上行承载 的传输路径切换至之后， eNB与 GW在切换后的传输路径上进行第一承载与第一承载相 应的上行承载的数据传输。
本实施例中， 可以使一个或多个 UE的全部或部分承载由 eNB与 GW之间的一个 传输路径切换至该 eNB与该 GW之间的另一个传输路径， 并将全部或部分不需要切换 传输路径的承载保留在原传输路径， 从而避免承载被不恰当地释放导致 UE的业务出现 异常的问题， 保证 UE的通信质量。
本发明的另一个实施例提供的一种承载处理方法包括步骤 210-260。 其中， 步骤 210-220与上述实施例中的步骤 110-120有区别， 而其他步骤的可选项和举例等描述可 参见上述实施例，此处不再赘述。下面详细介绍本实施例的步骤 210-220与步骤 110-120 的区别。
本实施例中的步骤 210中， eNB发送路径切换请求消息， 该路径切换请求消息携带 一个或多个 UE的标识， 上述 UE的第一承载的标识、 上述第一承载在 eNB侧的终点地 址， 以及至少一个指示信息， 其中， 第一承载是指需要切换传输路径的承载， 每个指示 信息与一个 UE的标识相对应， 用于指示是否允许释放属于与该指示信息对应的 UE的 所有承载中、 该路径切换请求消息未携带承载标识的承载。 本实施例中的指示信息是 UE级参数， 即仅对与该指示信息对应的 UE有效。 例如， 一个指示信息携带在与 UE 的标识相对应的信息单元中。可选的，如果某个 UE的标识没有与其相对应的指示信息， 则可视为指示信息为缺省值， 即默认为允许 （或不允许） 释放该 UE的所有承载中、 该 携带指示信息的消息或者信息单元未携带的承载。本步骤中的指示信息可采用的信息类 型有多种， 第一承载可能为双向承载或下行承载， 此处不再赘述。
本实施例的步骤 220中， MME将接收到的 UE的标识、 上述 UE的第一承载的标 识和上述第一承载在 eNB侧的终点地址发送给 GW，并根据接收到的指示信息确定是否 释放各 UE的承载中、 路径切换请求消息未携带承载标识的承载。 可选的， MME根据 资源状况等信息判断自身是否允许释放携带该指示信息的消息未携带承载标识的承载， 而不是直接听从 eNB的指示。
例如，在步骤 210中， eNB发送的 UE的标识包括 UE1的标识和 UE2的标识， eNB 发送两个指示信息， 其中， 与 UE1对应的指示信息指示允许释放该 UE的所有承载中、 路径切换请求消息未携带承载标识的承载， 而与 UE2对应的指示信息指示不允许释放 该 UE的所有承载中、该路径切换请求未携带承载标识的承载。则在步骤 220中， MME 确定释放 UE1 的所有承载中、 路径切换请求消息未携带承载标识的承载， 不释放 UE2 的所有承载中、 路径切换请求消息未携带承载标识的承载。 本实施例中， 可以使一个或多个 UE的全部或部分承载由 eNB与 GW之间的一个 传输路径切换至该 eNB与该 GW之间的另一个传输路径， 并将全部或部分不需要切换 传输路径的承载保留在原传输路径， 从而避免承载被不恰当地释放导致 UE的业务出现 异常的问题， 保证 UE的通信质量。
本发明的另一个实施例提供的一种处理承载处理方法包括步骤 310-360。 其中， 步 骤 310-320与上述实施例中的步骤 310-320有区别， 其他步骤的可选项和举例等描述可 参见上述实施例，此处不再赘述。下面详细介绍本实施例的步骤 310-320与步骤 110-120 的区别。
本实施例中的步骤 310中， eNB发送路径切换请求消息， 该路径切换请求消息携带 一个或多个 UE的标识， 上述 UE的第一承载的标识、 上述第一承载在 eNB侧的终点地 址， 上述 UE的第二承载的标识以及至少一个指示信息， 其中， 第一承载为需要切换传 输路径的承载， 第二承载为不需要切换传输路径且不允许释放的承载， 每一个指示信息 与一个第二承载的标识相对应， 用于指示不允许释放与该指示信息对应的承载。 本实施 例中的指示信息是承载级参数， 即仅对与该指示信息对应的承载有效。 例如， 一个指示 信息携带在与一个第二承载的标识相对应的信息单元中， 用于指示不允许释放该承载。 可选的， 如果 eNB还发送了一个或多个 UE的第三承载的标识，第三承载为不需要切换 传输路径且允许释放的承载， 则 eNB 可以还发送与第三承载对应的指示信息， 用于指 示允许释放该承载。 本步骤中的指示信息可采用的信息类型有多种， 第一承载可能为双 向承载或下行承载， 此处不再赘述。
本实施例的步骤 320中， MME将接收到的 UE的标识、 上述 UE的第一承载的标 识和上述第一承载在 eNB侧的终点地址发送给 GW，并根据接收到的指示信息确定将哪 些承载保留在原传输路径 （例如与指示信息对应的第二承载）， 以及释放哪些承载 （例 如与指示信息对应的第三承载）。可选的， MME根据资源状况等信息判断自身是否允许 将某个承载保留在原传输路径， 或者释放某个承载， 而不是直接听从 eNB的指示。
例如， 在步骤 310中， eNB发送的承载的标识包括： 承载 M、 承载 N和承载 P的 标识。 其中， 承载 M为第一承载， eNB不发送与该承载 M相对应的指示信息。 承载 N 为第二承载， eNB发送与该承载 N相对应的指示信息， 该指示信息指示不允许释放该 承载 N。承载 P为第三承载， eNB发送与该承载 P相对应的指示信息， 该指示信息指示 允许释放该承载 P。 则在步骤 320中， MME将承载 M所属的 UE的标识、 承载 M的标 识和该承载 M在 eNB侧的终点地址发送给 GW，不释放承载 N且将承载 N保留在原传 输路径， 并释放承载 P。
本实施例中， 可以使一个或多个 UE的全部或部分承载由 eNB与 GW之间的一个 传输路径切换至该 eNB与该 GW之间的另一个传输路径， 并将全部或部分不需要切换 传输路径的承载保留在原传输路径， 从而避免承载被不恰当地释放导致 UE的业务出现 异常的问题， 保证 UE的通信质量。
本发明的上述实施例均适用于 eNB与 GW之间的部分传输路径断掉或者出现拥塞 的场景，还适用于 eNB与 GW之间的传输路径在可靠性或 QoS保障方面有差异的场景。 以 eNB与 GW之间有 N个传输路径为例，假设 eNB确定其中的一个传输路径即将断掉， 则可以采用上述实施例提供的方法， 将这个即将断掉的传输路径上的全部 UE的承载切 换到其他的传输路径。 假设 eNB 确定其中的一个传输路径出现拥塞， 则可以采用上述 实施例提供的方法， 将这个出现拥塞的传输路径上的部分承载切换到其他的传输路径。 假设 eNB确定其中的一个传输路径的可靠性 （或 QoS保证） 低于预设门限， 或者低于 其他传输路径的可靠性 （或 QoS保证）， 则可以采用上述实施例提供的方法， 将这个可 靠性（或 QoS保证）较低的传输路径上的部分承载切换到其他的传输路径。上述的部分 承载可能是该传输路径上的某个 UE的全部承载或者部分承载，比如优先级较高的承载， 也可能是这个出现拥塞的传输路径上的某些 UE的全部承载或部分承载。
例如， 如图 2所示， eNB 中配置的三个 IP地址分别为 10.10.10.1， 10.10.11.1 和 10.10.12.1， GW中配置的三个 IP地址分别为 10.10.10.2， 10.10.11.2禾卩 10.10.12.2， 并且 传输地址 10.10.10.1和 10.10.10.2形成传输路径 A， 传输地址 10.10.11.1和 10.10.11.2形 成传输路径 B， 传输地址 10.10.12.1和 10.10.12.2形成传输路径 C。 当传输路径 A由于 某种原因即将断掉时， 将传输路径 A上的所有 UE的承载都切换到传输路径 B。 当传输 路径 A出现拥塞时，将传输路径 A上的一个或多个 UE的承载中的全部承载或部分承载 切换到传输路径 B或 C，例如 UE1的全部承载和 /或 UE2的部分承载切换到传输路径 B， 从而降低传输路径 A的拥塞程度或使传输路径 A不再拥塞。 当传输路径 A的可靠性或 QoS保障方面低于传输路径 B时，将传输路径 A上的一个或多个 UE的承载中的全部承 载或部分承载切换到传输路径 B， 例如 UE1的全部承载和 /或 UE2的部分承载切换到传 输路径 B， 从而更好的保障切换的承载对应的 UE的通信质量。
如图 3所示， 本发明的另一个实施例还提供一种设备， 该设备 300包括： 接收单元 310， 用于接收基站 eNB发送的路径切换请求消息， 上述路径切换请求消 息用于请求将至少一个承载切换至目标传输路径； 处理单元 330， 用于通知 GW将第一部分承载切换至目标传输路径， 并将第二部分 承载保留在原传输路径； 其中， 上述第一部分承载为上述切换请求消息中上述至少一个 承载的部分或全部， 上述第二部分承载为上述至少一个承载所属的用户设备 UE的所有 承载中除第一部分承载之外的承载的部分或全部。
可选的， 上述处理单元具体用于将上述第一部分承载的标识、 上述第一部分承载所 属的 UE的标识和第一部分承载在 eNB侧的终点地址发送给 GW。
可选的， 上述第一部分承载为双向承载时， 上述接收单元还用于接收 GW发送的 第一部分承载在 GW侧的终点地址，上述处理单元还用于将上述第一部分承载在 GW侧 的终点地址发送给 eNB， 以使 eNB将上述第一部分承载切换至目标传输路径时采用上 述第一部分承载在 GW侧的终点地址。 或者， 上述第一部分承载为下行承载时， 上述接 收单元还用于接收 GW发送的与第一部分承载相应的上行承载在 GW侧的终点地址， 上述处理单元还用于将与第一部分承载相应的上行承载在 GW 侧的终点地址发送给 eNB,以使 eNB将与第一部分承载相应的上行承载切换至目标传输路径时采用上述与第 一部分承载相应的上行承载在 GW侧的终点地址。
本实施例提供的设备可以为 MME， 还可以用于实现本发明各实施例提供的方法中
MME执行的步骤， 具体实现可参见上述实施例提供的方法描述， 此处不再赘述。 本实 施例提供的设备可以使一个或多个 UE的全部或部分承载由 eNB与 GW之间的一个传 输路径切换至该 eNB与该 GW之间的另一个传输路径， 并将全部或部分不需要切换传 输路径的承载保留在原传输路径， 从而避免承载被不恰当地释放导致 UE的业务出现异 常的问题， 保证 UE的通信质量。
如图 4所示， 本发明的另一个实施例还提供一种设备， 该设备 400包括： 发送单元 410， 用于发送路径切换请求消息给移动管理实体 MME, 上述路径切换 请求消息用于请求将至少一个承载切换至目标传输路径；
处理单元 430， 用于将第一部分承载切换至目标传输路径， 并将第二部分承载保留 在原传输路径； 其中， 上述第一部分承载为上述切换请求消息中上述至少一个承载的部 分或全部， 上述第二部分承载为上述至少一个承载所属的用户设备 UE的所有承载中除 第一部分承载之外的承载的部分或全部。
可选的， 上述路径切换请求消息还携带指示信息， 上述指示信息用于指示不允许释 放第二部分承载。
可选的， 上述第一部分承载为双向承载时，上述处理单元具体用于接收 MME发送 的第一部分承载在 GW侧的终点地址， 以及将上述第一部分承载切换至目标传输路径， 上述第一部分承载采用上述第一部分承载在 GW侧的终点地址与上述第一部分承载在 上述设备侧的终点地址； 或者，
上述第一部分承载为下行承载时， 上述处理单元还用于接收 MME发送的与第一部 分承载相应的上行承载在 GW侧的终点地址，以及将上述与第一部分承载相应的上行承 载切换至目标传输路径， 上述与第一部分承载相应的上行承载采用上述与第一部分承载 相应的上行承载在 GW侧的终点地址。
本实施例提供的设备可以为 eNB， 还可以用于实现本发明各实施例提供的方法中 eNB执行的步骤， 具体实现可参见上述实施例提供的方法描述， 此处不再赘述。 本实施 例提供的设备可以使一个或多个 UE的全部或部分承载由 eNB与 GW之间的一个传输 路径切换至该 eNB与该 GW之间的另一个传输路径， 并将全部或部分不需要切换传输 路径的承载保留在原传输路径， 从而避免承载被不恰当地释放导致 UE的业务出现异常 的问题， 保证 UE的通信质量。
如图 5所示， 本发明的另一个实施例还提供一种系统， 该系统 500包括 eNB510， MME530和 GW550, 其中：
上述 eNB510用于向上述 MME发送路径切换请求消息， 上述路径切换请求消息用 于请求将至少一个承载切换至目标传输路径；
上述 MME530用于接收上述路径切换请求消息， 并通知网关 GW将第一部分承载 切换至目标传输路径， 并将第二部分承载保留在原传输路径；
上述 GW550用于将上述第一部分承载切换至目标传输路径；
上述 eNB510还用于将上述第一部分承载切换至目标传输路径， 并将第二部分承载 保留在原传输路径；
其中， 上述第一部分承载为上述切换请求消息中上述至少一个承载的部分或全部， 上述第二部分承载为上述至少一个承载所属的用户设备 UE的所有承载中除第一部分承 载之外的承载的部分或全部。
本实施例提供的系统中， MME530、 eNB510和 GW550的执行步骤等细节实现可参 见本发明各实施例提供的方法描述， 此处不再赘述。 本实施例提供的系统可以使一个或 多个 UE的全部或部分承载由 eNB与 GW之间的一个传输路径切换至该 eNB与该 GW 之间的另一个传输路径， 并将全部或部分不需要切换传输路径的承载保留在原传输路 径， 从而避免承载被不恰当地释放导致 UE的业务出现异常的问题， 保证 UE的通信质 本领域普通技术人员可以理解实现上述实施例方法中的全部或部分步骤是可以通 过程序来指令相关的硬件来完成， 上述的程序可以存储于一计算机可读取存储介质中， 上述的存储介质， 如： ROM/RAM、 磁碟、 光盘等。
例如， 本发明的一个实施例提供的一种方法， 可选的， 该方法可以通过程序来指令 相关的硬件来完成。 该方法包括： MME接收 eNB发送的路径切换请求消息， 上述路径 切换请求消息用于请求将至少一个承载切换至目标传输路径； MME通知 GW将第一部 分承载切换至目标传输路径， 并将第二部分承载保留在原传输路径； 其中， 上述第一部 分承载为上述切换请求消息中上述至少一个承载的部分或全部， 上述第二部分承载为上 述至少一个承载所属的用户设备 UE的所有承载中除第一部分承载之外的承载的部分或 全部。
可选的， 上述路径切换请求消息携带上述至少一个承载的标识和上述至少一个承载 所属的 UE的标识， 其中， 上述至少一个承载属于一个 UE， 或者上述至少一个承载为 多个承载时， 上述多个承载分属于多个 UE。
进一步的， 上述路径切换请求消息还携带指示信息， 上述指示信息用于指示不允许 释放第二部分承载。
可选的，上述 MME通知 GW将上述第一部分承载切换至目标传输路径包括： MME 将上述第一部分承载的标识、 上述第一部分承载所属的 UE 的标识和第一部分承载在 eNB侧的终点地址发送给 GW。
进一步的， 如果上述第一部分承载为双向承载，本实施例提供的方法还包括： MME 接收 GW发送的第一部分承载在 GW侧的终点地址； MME将上述第一部分承载在 GW 侧的终点地址发送给 eNB， 以使 eNB将上述第一部分承载切换至目标传输路径时采用 上述第一部分承载在 GW侧的终点地址。 可选的， 上述第一部分承载在 GW侧的终点 地址是上述 GW根据接收到的第一部分承载在 eNB侧的终点地址确定上述第一部分承 载需要切换传输路径之后， 为上述第一部分承载分配的。
如果上述第一部分承载为下行承载， 本实施例提供的方法还包括： MME接收 GW 发送的与第一部分承载相应的上行承载在 GW侧的终点地址； MME将与第一部分承载 相应的上行承载在 GW侧的终点地址发送给 eNB, 以使 eNB将与第一部分承载相应的 上行承载切换至目标传输路径时采用上述与第一部分承载相应的上行承载在 GW侧的 终点地址。 可选的， 上述与第一部分承载相应的上行承载在 GW侧的终点地址是上述 GW根据接收到的第一部分承载在 eNB侧的终点地址确定上述第一部分承载以及与第 一部分承载相应的上行承载需要切换传输路径之后， 为上述与第一部分承载相应的上行 承载分配的。
又如， 本发明的一个实施例提供的一种方法， 可选的， 该方法可以通过程序来指令 相关的硬件来完成。 该方法包括： 基站 eNB发送路径切换请求消息给 MME, 上述路径 切换请求消息用于请求将至少一个承载切换至目标传输路径； eNB将第一部分承载切换 至目标传输路径， 并将第二部分承载保留在原传输路径； 其中， 上述第一部分承载为上 述切换请求消息中上述至少一个承载的部分或全部， 上述第二部分承载为上述至少一个 承载所属的用户设备 UE的所有承载中除第一部分承载之外的承载的部分或全部。
可选的， 上述路径切换请求消息携带上述至少一个承载的标识和上述至少一个承载 所属的 UE的标识， 其中， 上述至少一个承载属于一个 UE， 或者上述至少一个承载为 多个承载时， 上述多个承载分属于多个 UE。
可选的， 上述路径切换请求消息还携带指示信息， 上述指示信息用于指示不允许释 放第二部分承载。
进一步的， 上述第一部分承载为双向承载时， 上述 eNB 将上述第一部分承载切换 至目标传输路径包括： eNB接收 MME发送的第一部分承载在 GW侧的终点地址； 上述 eNB将上述第一部分承载切换至目标传输路径，上述第一部分承载采用上述第一部分承 载在 GW侧的终点地址与上述第一部分承载在 eNB侧的终点地址。 或者， 上述第一部 分承载为下行承载时， 本实施例提供的方法还包括： eNB接收 MME发送的与第一部分 承载相应的上行承载在 GW侧的终点地址； 上述 eNB将上述与第一部分承载相应的上 行承载切换至目标传输路径， 上述与第一部分承载相应的上行承载采用上述与第一承载 相应的上行承载在 GW侧的终点地址。
以下对上述实施例提供的设备、 系统和方法中路径切换请求消息携带指示信息， 上 述指示信息用于指示不允许释放第二部分承载做简单举例。 例如， 上述路径切换请求消 息携带的指示信息用于指示不允许释放上述路径切换请求消息未携带承载标识的承载， 也就是说，上述第二部分承载包括上述路径切换请求消息未携带承载标识的承载。又如， 上述至少一个承载属于一个 UE时， 上述路径切换请求消息携带的指示信息与上述一个 UE 的标识相对应， 用于指示不允许释放上述路径切换请求消息未携带承载标识的承载 中属于上述一个 UE的承载， 也就是说， 上述第二部分承载包括上述路径切换请求消息 未携带承载标识的承载中属于上述一个 UE的承载。 又如， 上述至少一个承载为多个承 载， 上述多个承载分属于多个 UE时， 上述路径切换请求消息携带的指示信息中的至少 一个指示信息与上述多个 UE中的一个 UE的标识相对应， 用于指示不允许释放上述路 径切换请求消息未携带承载标识的承载中属于与上述指示信息对应的 UE的承载， 也就 是说， 上述第二部分承载包括上述路径切换请求消息未携带承载标识的承载中属于第二 部分 UE的承载， 上述第二部分 UE对应的指示信息指示不允许释放上述路径切换请求 消息未携带承载标识的承载中属于与上述指示信息对应的 UE的承载。 又如， 上述路径 切换请求消息还携带上述第二部分承载的标识， 上述路径切换请求消息携带的指示信息 中的至少一个指示信息与上述第二部分承载中的一个承载的标识相对应，用于指示不允 许释放与上述指示信息对应的承载。
本领域普通技术人员可以理解实现上述实施例方法中的全部或部分流程， 是可以通 过计算机程序来指令相关的硬件来完成， 计算机程序可存储于计算机可读取存储介质 中， 该程序在执行时， 可包括如上述各方法的实施例的流程。 其中， 计算机可读取存储 介质可为磁碟、 光盘、 只读存储记忆体 （Read-Only Memory, ROM) 或随机存储记忆 体 (Random Access Memory, RAM) 等。
以上仅是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说， 在不脱离本发明原理的前提下， 还可以作出若干改进和润饰， 这些改进和润饰也应视为本发 明的保护范围。

Claims

权利要求
1、 一种承载处理方法， 其特征在于， 包括：
移动管理实体 MME接收基站 eNB发送的路径切换请求消息，所述路径切换请求消息 用于请求将至少一个承载切换至目标传输路径；
MME通知网关 GW将第一部分承载切换至目标传输路径，并将第二部分承载保留在 原传输路径；
其中， 所述第一部分承载为所述切换请求消息中所述至少一个承载的部分或全部， 所述第二部分承载为所述至少一个承载所属的用户设备 UE的所有承载中除第一部分承 载之外的承载的部分或全部。
2、 如权利要求 1所述的方法， 其特征在于， 所述路径切换请求消息携带所述至少一 个承载的标识和所述至少一个承载所属的 UE的标识， 其中， 所述至少一个承载属于一 个 UE， 或者所述至少一个承载为多个承载时， 所述多个承载分属于多个 UE。
3、如权利要求 2所述的方法，其特征在于，所述路径切换请求消息还携带指示信息， 所述指示信息用于指示不允许释放第二部分承载。
4、 如权利要求 3所述的方法， 其特征在于， 所述路径切换请求消息携带的指示信息 用于指示不允许释放所述路径切换请求消息未携带承载标识的承载。
5、 如权利要求 4所述的方法， 其特征在于， 所述第二部分承载包括所述路径切换请 求消息未携带承载标识的承载。
6、 如权利要求 3所述的方法， 其特征在于， 所述至少一个承载属于一个 UE时， 所 述路径切换请求消息携带的指示信息与所述一个 UE的标识相对应， 用于指示不允许释 放所述路径切换请求消息未携带承载标识的承载中属于所述一个 UE的承载。
7、 如权利要求 6所述的方法， 其特征在于， 所述第二部分承载包括所述路径切换请 求消息未携带承载标识的承载中属于所述一个 UE的承载。
8、 如权利要求 3所述的方法， 其特征在于， 所述至少一个承载为多个承载， 所述多 个承载分属于多个 UE时， 所述路径切换请求消息携带的指示信息中的至少一个指示信 息与所述多个 UE中的一个 UE的标识相对应， 用于指示不允许释放所述路径切换请求消 息未携带承载标识的承载中属于与所述指示信息对应的 UE的承载。
9、 如权利要求 8所述的方法， 其特征在于， 所述第二部分承载包括所述路径切换请 求消息未携带承载标识的承载中属于第二部分 UE的承载， 所述第二部分 UE对应的指示 信息指示不允许释放所述路径切换请求消息未携带承载标识的承载中属于与所述指示 信息对应的 UE的承载。
10、 如权利要求 3所述的方法， 其特征在于， 所述路径切换请求消息还携带所述第 二部分承载的标识，所述路径切换请求消息携带的指示信息中的至少一个指示信息与所 述第二部分承载中的一个承载的标识相对应，用于指示不允许释放与所述指示信息对应 的承载。
11、 如权利要求 1至 10任一项所述的方法， 其特征在于， 所述 MME通知 GW将所述 第一部分承载切换至目标传输路径包括：
MME将所述第一部分承载的标识、 所述第一部分承载所属的 UE的标识和第一部分 承载在 eNB侧的终点地址发送给 GW。
12、 如权利要求 11所述的方法， 其特征在于， 所述第一部分承载为双向承载时， 所 述方法还包括：
MME接收 GW发送的第一部分承载在 GW侧的终点地址；
MME将所述第一部分承载在 GW侧的终点地址发送给 eNB， 以使 eNB将所述第一部 分承载切换至目标传输路径时采用所述第一部分承载在 GW侧的终点地址。
13、 如权利要求 12所述的方法， 其特征在于， 所述第一部分承载在 GW侧的终点地 址是所述 GW根据接收到的第一部分承载在 eNB侧的终点地址确定所述第一部分承载需 要切换传输路径之后， 为所述第一部分承载分配的。
14、 如权利要求 11所述的方法， 其特征在于， 所述第一部分承载为下行承载时， 所 述方法还包括：
MME接收 GW发送的与第一部分承载相应的上行承载在 GW侧的终点地址；
MME将与第一部分承载相应的上行承载在 GW侧的终点地址发送给 eNB， 以使 eNB 将与第一部分承载相应的上行承载切换至目标传输路径时采用所述与第一部分承载相 应的上行承载在 GW侧的终点地址。
15、 如权利要求 14所述的方法， 其特征在于， 所述与第一部分承载相应的上行承载 在 GW侧的终点地址是所述 GW根据接收到的第一部分承载在 eNB侧的终点地址确定所 述第一部分承载以及与第一部分承载相应的上行承载需要切换传输路径之后， 为所述与 第一部分承载相应的上行承载分配的。
16、 一种承载处理方法， 其特征在于， 包括： 基站 eNB发送路径切换请求消息给移动管理实体 MME，所述路径切换请求消息用于 请求将至少一个承载切换至目标传输路径；
eNB将第一部分承载切换至目标传输路径， 并将第二部分承载保留在原传输路径； 其中， 所述第一部分承载为所述切换请求消息中所述至少一个承载的部分或全部， 所述第二部分承载为所述至少一个承载所属的用户设备 UE的所有承载中除第一部分承 载之外的承载的部分或全部。
17、 如权利要求 16所述的方法， 其特征在于， 所述路径切换请求消息携带所述至少 一个承载的标识和所述至少一个承载所属的 UE的标识， 其中， 所述至少一个承载属于 一个 UE， 或者所述至少一个承载为多个承载时， 所述多个承载分属于多个 UE。
18、 如权利要求 17所述的方法， 其特征在于， 所述路径切换请求消息还携带指示信 息， 所述指示信息用于指示不允许释放第二部分承载。
19、 如权利要求 18所述的方法， 其特征在于， 所述路径切换请求消息携带的指示信 息用于指示不允许释放所述路径切换请求消息未携带承载标识的承载； 或者，
所述至少一个承载属于一个 UE时， 所述路径切换请求消息携带的指示信息与所述 一个 UE的标识相对应， 用于指示不允许释放所述路径切换请求消息未携带承载标识的 承载中属于所述一个 UE的承载； 或者，
所述至少一个承载为多个承载， 所述多个承载分属于多个 UE时， 所述路径切换请 求消息携带的指示信息中的至少一个指示信息与所述多个 UE中的一个 UE的标识相对 应，用于指示不允许释放所述路径切换请求消息未携带承载标识的承载中属于与所述指 示信息对应的 UE的承载； 或者，
所述路径切换请求消息还携带所述第二部分承载的标识，所述路径切换请求消息携 带的指示信息中的至少一个指示信息与所述第二部分承载中的一个承载的标识相对应， 用于指示不允许释放与所述指示信息对应的承载。
20、 如权利要求 16至 19任一项所述的方法， 其特征在于，
所述第一部分承载为双向承载时， 所述 eNB将所述第一部分承载切换至目标传输路 径包括：
eNB接收 MME发送的第一部分承载在 GW侧的终点地址；
所述 eNB将所述第一部分承载切换至目标传输路径， 所述第一部分承载采用所述第 一部分承载在 GW侧的终点地址与所述第一部分承载在 eNB侧的终点地址； 或者，
所述第一部分承载为下行承载时， 所述方法还包括： eNB接收 MME发送的与第一部分承载相应的上行承载在 GW侧的终点地址； 所述 eNB将所述与第一部分承载相应的上行承载切换至目标传输路径， 所述与第一 部分承载相应的上行承载采用所述与第一承载相应的上行承载在 GW侧的终点地址。
21、 一种设备， 其特征在于， 包括：
接收单元， 用于接收基站 eNB发送的路径切换请求消息， 所述路径切换请求消息用 于请求将至少一个承载切换至目标传输路径； 及
处理单元， 用于通知网关 GW将第一部分承载切换至目标传输路径， 并将第二部分 承载保留在原传输路径； 其中， 所述第一部分承载为所述切换请求消息中所述至少一个 承载的部分或全部， 所述第二部分承载为所述至少一个承载所属的用户设备 UE的所有 承载中除第一部分承载之外的承载的部分或全部。
22、 如权利要求 21所述的设备， 其特征在于， 所述处理单元具体用于将所述第一部 分承载的标识、所述第一部分承载所属的 UE的标识和第一部分承载在 eNB侧的终点地址 发送给 GW。
23、 如权利要求 22所述的设备， 其特征在于，
所述第一部分承载为双向承载时， 所述接收单元还用于接收 GW发送的第一部分承 载在 GW侧的终点地址， 所述处理单元还用于将所述第一部分承载在 GW侧的终点地址 发送给 eNB , 以使 eNB将所述第一部分承载切换至目标传输路径时采用所述第一部分承 载在 GW侧的终点地址； 或者，
所述第一部分承载为下行承载时， 所述接收单元还用于接收 GW发送的与第一部分 承载相应的上行承载在 GW侧的终点地址， 所述处理单元还用于将与第一部分承载相应 的上行承载在 GW侧的终点地址发送给 eNB， 以使 eNB将与第一部分承载相应的上行承 载切换至目标传输路径时采用所述与第一部分承载相应的上行承载在 GW侧的终点地 址。
24、 一种设备， 其特征在于， 包括：
发送单元， 用于发送路径切换请求消息给移动管理实体 MME, 所述路径切换请求 消息用于请求将至少一个承载切换至目标传输路径； 及
处理单元， 用于将第一部分承载切换至目标传输路径， 并将第二部分承载保留在原 传输路径； 其中， 所述第一部分承载为所述切换请求消息中所述至少一个承载的部分或 全部， 所述第二部分承载为所述至少一个承载所属的用户设备 UE的所有承载中除第一 部分承载之外的承载的部分或全部。
25、 如权利要求 24所述的设备， 其特征在于， 所述路径切换请求消息还携带指示信 息， 所述指示信息用于指示不允许释放第二部分承载。
26、如权利要求 24或 25所述的设备，其特征在于，所述第一部分承载为双向承载时， 所述处理单元具体用于接收 MME发送的第一部分承载在 GW侧的终点地址， 以及将所述 第一部分承载切换至目标传输路径， 所述第一部分承载采用所述第一部分承载在 GW侧 的终点地址与所述第一部分承载在所述设备侧的终点地址； 或者，
所述第一部分承载为下行承载时， 所述处理单元还用于接收 MME发送的与第一部 分承载相应的上行承载在 GW侧的终点地址， 以及将所述与第一部分承载相应的上行承 载切换至目标传输路径，所述与第一部分承载相应的上行承载采用所述与第一部分承载 相应的上行承载在 GW侧的终点地址。
27、 一种系统， 包括基站 eNB， 移动管理实体 MME和网关 GW， 其特征在于， 所述基站 eNB用于向所述 MME发送路径切换请求消息，所述路径切换请求消息用于 请求将至少一个承载切换至目标传输路径；
所述 MME用于接收所述路径切换请求消息，并通知网关 GW将第一部分承载切换至 目标传输路径， 并将第二部分承载保留在原传输路径；
所述 GW用于将所述第一部分承载切换至目标传输路径；
所述 eNB还用于将所述第一部分承载切换至目标传输路径， 并将第二部分承载保留 在原传输路径；
其中， 所述第一部分承载为所述切换请求消息中所述至少一个承载的部分或全部， 所述第二部分承载为所述至少一个承载所属的用户设备 UE的所有承载中除第一部分承 载之外的承载的部分或全部。
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