WO2009132582A1 - 一种删除承载的方法与装置 - Google Patents

一种删除承载的方法与装置 Download PDF

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Publication number
WO2009132582A1
WO2009132582A1 PCT/CN2009/071544 CN2009071544W WO2009132582A1 WO 2009132582 A1 WO2009132582 A1 WO 2009132582A1 CN 2009071544 W CN2009071544 W CN 2009071544W WO 2009132582 A1 WO2009132582 A1 WO 2009132582A1
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WIPO (PCT)
Prior art keywords
bearer
management entity
mobility control
user mobility
control management
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PCT/CN2009/071544
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English (en)
French (fr)
Inventor
熊春山
沈宇希
艾明
Original Assignee
大唐移动通信设备有限公司
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Application filed by 大唐移动通信设备有限公司 filed Critical 大唐移动通信设备有限公司
Publication of WO2009132582A1 publication Critical patent/WO2009132582A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W76/00Connection management
    • H04W76/30Connection release
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W88/00Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/18Service support devices; Network management devices

Definitions

  • the present invention relates to mobile communication technologies, and in particular, to a method and apparatus for deleting a bearer. Background of the invention
  • EPS Evolved Packet System
  • SGSN User Rate Control Management Entity
  • UTRAN/GERAN access rate radio access network
  • E-UTRAN Evolved Universal Terrestrial Radio Access Network
  • MMEs Evolved Universal Terrestrial Radio Access Network
  • I SR idle state signaling optimization
  • the technology can reduce the signaling amount of the mobility management procedure when the user terminal (UE) in the idle state resides in the boundary area of the UTRAN/GERAN and E-TURAN access systems, and the idle state refers to the UE and the current station. There is no non-access stratum signaling connection between the user mobility control management entities corresponding to the reservation area.
  • the ISR function of the UE When the ISR function of the UE is activated, the UE will simultaneously register to the user mobility control management entity corresponding to the UTRAN/GERAN and E-TURAN access systems, namely SGSN and MME.
  • the gateway (Serving GW) will also maintain the GTP control plane (GTP Cont ro l, GTP-C) connection of the S 3 interface and the S 11 interface with the SGSN and the MME, that is, the GTP-C connection of the two interfaces.
  • GTP Cont ro l, GTP-C GTP Control plane
  • the general routing area update or the general tracking area update operation is not required. Avoid frequent routing area or tracking area update operations that may occur when the UE moves between E and SGSN managed areas, and reduce air interface signaling.
  • the ISR function of the UE After the ISR function of the UE is activated, if the General Packet Radio Service (GPRS) tunneling protocol is used between the Serving GW and the Packet Data Network Gateway (PDN GW), an EPS bearer of the UE is ⁇ E, the Serv ing GW and the PDN GW all have corresponding EPS bearer contexts, and the packet data protocol (PDP) context corresponding to the EPS bearer is also saved on the SGSN, and thereafter the MME and the SGSN are required to be in the EPS bearer context.
  • the PDP context remains synchronized.
  • GPRS General Packet Radio Service
  • PDN GW Packet Data Network Gateway
  • the SGSN when the UE activates a new EPS bearer in the E-UTRAN access system and then returns to the UTRAN/GERAN access system, the SGSN will establish a corresponding PDP context by context synchronization; when the UE is connected in the E-UTRAN The SGSN deletes the corresponding PDP context by using context synchronization in the UTRAN/GERAN.
  • the UE's QoS in a PDP context accessed by the UTRAN/GERAN is modified, the UE then When returning to E-UTRAN, ⁇ E will modify the QoS of the corresponding EPS bearer context by means of context synchronization.
  • the current user mobility control management entity ⁇ E or SGSN of the UE will notify the Serving GW that the I SR function of the UE is deactivated, and the Serving GW deletes itself.
  • Another user mobility control management entity corresponds to an evolved packet system session management (ESM) or session management (SM) context.
  • ESM evolved packet system session management
  • SM session management
  • the existing EPS system gives a method for deleting an EPS bearer initiated by the PDN GW.
  • the PDN GW sends a delete bearer request to the Serving GW, and the Serving GW will trigger the current user mobility control management entity of the UE to complete the corresponding delete bearer processing according to the delete request.
  • the method is only applicable when the UE is in the connected state after the ISR function is not activated or the ISR function of the UE is deactivated or the ISR function of the UE is activated.
  • the UE when the UE does not activate the ISR function or the ISR function of the UE is deactivated, only one user mobility control management entity serves the UE, and correspondingly, the UE mobile control management entity of the UE There is also only one GTP-C connection between the Serving GWs of the UE.
  • the ISR function of the UE When the ISR function of the UE is activated, the UE maintains the non-access layer signaling connection only by the user mobility control management entity corresponding to the current camping area, that is, the current user mobility control management entity.
  • the Serving GW The UE can be in a connected state by determining the GTP-U connection of the S1-U interface and the notification of the SGSN, and whether the current user mobility control management entity of the UE is ⁇ E or SGSN. Therefore, in the above case, using the existing method of deleting the EPS bearer, the Serving GW may determine to send a delete request message to the current user mobility control management entity of the UE to trigger the completion of the corresponding delete bearer process.
  • the Serving GW of the UE maintains the GTP-C connection with the SGSN and the E, so The Serving GW cannot determine which user mobility control management entity is triggered to delete the EPS bearer, and ensures that after the EPS 7 is deleted, the MME and the SGSN are synchronized on the EPS 7 context and the PDP context.
  • the Serving GW sends a delete bearer request message or a delete PDP context request message to the SGSN, and does not send a delete request message to the MME, after receiving the message, the SGSN finds that the UE is in an idle state, and will not page the UE, but only Deleting an EPS 7-borne context of the UE in its SM context; thus, although the synchronization between the SGSN and the Serving GW is achieved in the EPS bearer state, the E is not synchronized with the Serving GW and the SGSN in the EPS bearer state. That is, the ESM context on the MME is not updated.
  • the ESM context of the E is not updated.
  • E does not know that the EPS 7 bearer is deleted, so the UE cannot synchronize the UE with the network on the EPS bearer through the tracking area update process. Therefore, the existing method for deleting a bearer initiated by the PDN GW is not applicable to the case where the UE is in an idle state after the ISR function is activated.
  • the Policy and Charging Rules Function can also trigger the Serving Gateway (Serving GW). Initiate the delete bearer process. For the same reason, the existing method of deleting bearers initiated by the PCRF is not applicable to the case where the UE is in an idle state after the ISR function is activated.
  • the existing method for deleting bearers initiated by the PDN GW or the PCRF is not applicable to the case where the UE is in an idle state after the ISR function is activated.
  • the main purpose of the present invention is to provide a method and an apparatus for deleting a bearer.
  • the present invention is applicable not only to a UE that does not activate an ISR function, but also that the UE is in a connected state after the ISR function of the UE is deactivated or the ISR function of the UE is activated.
  • the case of the time is also applicable to the case where the UE is in an idle state after the ISR function of the UE is activated.
  • a method for deleting a load comprising:
  • the service gateway selects a user mobility control management entity that performs the bearer deletion process, and sends a delete request message to the service;
  • the selected user mobility control management entity performs corresponding deletion bearer processing according to the delete bearer request message.
  • the PDN GW or the PCRF triggers the service gateway to initiate a delete bearer process.
  • step a is:
  • the PDN GW sends a delete bearer request message to the Serving GW, and the Serving GW initiates the delete bearer process according to the delete bearer request message;
  • the PCRF sends a QoS policy to the Serving GW, and the Serving GW initiates the delete bearer process according to the QoS policy.
  • the selection in the step b is based on the connection status of the UE, The activation state of the ISR function of the UE and the current radio access type of the UE are performed.
  • the method for the service gateway to perform the user mobility control management entity for deleting the bearer processing in the step b includes:
  • Bl2 determine the current radio access type of the UE, if it is UTRAN/GERAN, select the SGSN as the user mobility control management entity for performing bearer deletion processing, and if it is E-UTRAN, select the MME to perform user mobility control for deleting bearer processing.
  • a management entity quit the process of deleting the user mobility control management entity that performs the bearer processing;
  • bl3 determining whether the UE is in an idle state, and if yes, selecting the SGSN and the MME to jointly perform the user mobility control management entity for deleting the bearer processing, otherwise
  • the current user mobility control management entity that establishes a signaling connection with the UE is selected as a user mobility control management entity that performs bearer deletion processing.
  • the method for the service gateway to perform the user mobility control management entity for deleting the bearer processing in the step b includes:
  • B22 Determine the current radio access type of the UE. If it is UTRAN/GERAN, select the SGSN as the user mobility control management entity for performing bearer deletion processing. If it is E-UTRAN, select MME as the user mobility control for performing bearer deletion processing. a management entity, exiting the process of deleting the user mobility control management entity that performs the bearer processing; b23, determining whether the UE is in an idle state, if yes, proceeding to step b24, otherwise selecting a current connection established with the UE
  • the user mobility control management entity is a user mobility control management entity that performs the deletion bearer process, and exits the process of selecting the user mobility control management entity that deletes the bearer process; B24.
  • the step c includes:
  • the SGSN determines whether the UE is in an idle state after receiving the delete bearer request message, and if yes, deletes the PDP context corresponding to the bearer saved by itself and updates The session management context, otherwise, the PDP context deactivation process and the radio access bearer (RAB) deletion process are initiated to the UE, and then the PDP context corresponding to the bearer saved by itself is deleted, and the session management context is updated;
  • RAB radio access bearer
  • the MME determines whether the UE is in an idle state after receiving the delete bearer request message, and if yes, deletes the EPS bearer context corresponding to the bearer saved by the MME, and Update its evolved packet system session management context, otherwise initiate the EPS bearer deactivation process and the radio bearer (RB) deletion process to the UE, and then delete the EPS bearer context corresponding to the bearer saved by itself and update its evolved packet system. Session management context.
  • step c further includes:
  • the SGSN If the SGSN is the selected user mobility control management entity, the SGSN sends a delete bearer response message to the serving gateway after performing corresponding deletion bearer processing;
  • the MME If the MME is the selected user mobility control management entity, the MME sends a delete bearer response message to the serving gateway after performing corresponding deletion bearer processing;
  • the step c further includes:
  • the serving gateway triggers the serving gateway to initiate the delete bearer process in the step a, when the serving gateway receives the deleted bearer response sent by the selected user mobility control management entity After the message, the serving gateway sends a delete bearer response message to the PDN GW; if the PCRF triggers the serving gateway to initiate the delete bearer process in step a, when the serving gateway receives the delete bearer response message sent by the selected user mobility control management entity After that, the serving gateway sends a completion message to the PCRF.
  • a device for implementing a service gateway to delete a bearer comprising:
  • a message sending and receiving module configured to receive a message that triggers the service gateway to initiate a delete bearer process, and triggers the processing module to execute; and sends a delete bearer request message to the user mobility control management entity selected by the processing module;
  • a processing module configured to select a user mobility control management entity that performs the deletion processing, and trigger the messaging module to send a delete bearer request message to the selected user mobility control management entity.
  • the processing module includes:
  • An activation determining unit configured to determine whether the ISR function of the UE has been activated, and if triggered by the idle determination unit, triggering the wireless access type determining unit to execute;
  • the radio access type determining unit is configured to determine a current radio access type of the UE, and if it is a UTRAN/GERAN, select the SGSN as a user mobility control management entity that performs the bearer deletion process, and trigger the message sending and receiving module to send a delete bearer request message to the SGSN. If the E-UTRAN is selected, the MME is selected as the user mobility control management entity that performs the bearer deletion process, and the triggering message sending and receiving module sends a delete bearer request message to the MME.
  • the idle judging unit judges whether the UE is in an idle state, and if yes, selects the SGSN and the MME to jointly perform the user mobility control management entity for performing the deletion processing, and triggers the messaging module to send a delete request message to the SGSN and the MME, otherwise triggering the current
  • the management entity judgment unit executes;
  • the current management entity determining unit is configured to determine a current user mobility control management entity that establishes a signaling connection with the UE, and if the SGSN is an SGSN, select the SGSN as the deletion bearer.
  • the processed user mobility control management entity sends a delete bearer request message to the SGSN, and the MME sends the delete bearer request message to the MME.
  • the MME sends the delete bearer request message to the MME.
  • the message sending and receiving module is further configured to receive a delete bearer request message sent by the PDN GW or a QoS policy sent by the PCRF, and trigger the processing module to execute.
  • the processing module includes:
  • An activation determining unit configured to determine whether the ISR function of the UE has been activated, if yes, triggering the idle determination unit to execute, otherwise triggering the wireless access type determining unit to execute;
  • the radio access type determining unit is configured to determine a current radio access type of the UE, and if it is a UTRAN/GERAN, select the SGSN as a user mobility control management entity that performs the bearer deletion process, and trigger the message sending and receiving module to send a delete bearer request message to the SGSN. If the E-UTRAN is selected, the MME is selected as the user mobility control management entity that performs the bearer deletion process, and the triggering message sending and receiving module sends a delete bearer request message to the MME.
  • the idle judging unit judges whether the UE is in an idle state, and if so, triggers the context judging unit to execute, otherwise triggers the current management entity judging unit to execute;
  • the context determining unit is configured to determine whether the deleted bearer is included in the SM context information associated with the SGSN, and if yes, select the SGSN as the user mobility control management entity that performs the bearer processing, and trigger the messaging module to send the delete bearer to the SGSN. a request message; determining whether the deleted bearer is included in the ESM context information associated with the MME, and if yes, selecting the MME as the user mobility control management entity that performs the bearer deletion process, and triggering the message sending and receiving module to send a delete bearer request message to the MME;
  • a current management entity determining unit configured to determine a current user mobility control management entity that establishes a signaling connection with the UE, and if the SGSN is an SGSN, select a user mobility control management entity that performs a bearer deletion process, and trigger a message sending and receiving module to send to the SGSN.
  • Delete bearer The request message; if it is the MME, selects the user mobility control management entity that performs the deletion processing, and triggers the message sending and receiving module to send a delete bearer request message to the MME.
  • the processing module further includes: a response unit, configured to: when receiving the delete bearer response message sent by the selected user mobility control management entity, trigger the message sending and receiving module to send a delete bearer response to the PDN GW. Message or send a completion message to the PCRF;
  • the message sending and receiving module is further configured to receive a delete bearer response message sent by the user mobility control management entity selected by the processing module, and forward the message to the processing module; send a delete message to the PDN GW or send a completion message to the PCRF.
  • the method and apparatus for deleting a bearer after the Serving GW receives the delete bearer request message sent by the PDN GW, according to the connection state of the UE, the activation state of the ISR function of the UE, and the current wireless connection of the UE. Incoming type, select the user mobility control management entity that deletes the bearer processing in different situations, and triggers the corresponding deletion processing by sending a delete bearer request message.
  • the Serving GW may determine the user mobility control management entity that performs the deletion processing, and trigger the selected user mobility control management entity to perform the Corresponding deletion bearer processing, so that the present invention is applicable not only to the case where the UE does not activate the ISR function or the UE's ISR function is deactivated or the UE's ISR function is activated, and the UE is in the connected state, and is also applicable to the UE's ISR function.
  • the UE is in an idle state after activation.
  • Figure 1 is a schematic flow chart of the method of the present invention
  • Embodiment 1 of a method according to the present invention is a schematic flow chart of Embodiment 1 of a method according to the present invention
  • 3 is a schematic structural view of Embodiment 1 of the device of the present invention
  • FIG. 4 is a schematic structural view of a processing module in the device of the present invention. Mode for carrying out the invention
  • the basic idea of the present invention is: when the Serving GW is triggered by the PDN GW or the PCRF to initiate the process of deleting the bearer, the bearer is deleted according to the connection state of the UE, the activation state of the ISR function of the UE, and the current radio access type of the UE.
  • the processed user mobility control management entity triggers the selected user mobility control management entity to perform corresponding deletion bearer processing by sending a delete request message.
  • FIG. 1 is a flowchart of a method according to the present invention.
  • the method for deleting a bearer according to the present invention as shown in FIG. 1 includes:
  • Step 101 Trigger a service gateway to initiate a delete bearer process.
  • the initiation of the deletion bearer process is implemented by the PDN GW or the PCRF sending a message triggering the service gateway to initiate a delete bearer process to the serving gateway, where the message may indicate that a bearer is deleted, and the deletion may be indicated. All bearers of the PDN connection.
  • the specific implementation method of this step may be:
  • the PDN GW sends a delete bearer request message to the Serving GW, and the Serving GW initiates the delete bearer process according to the delete bearer request message;
  • the PCRF sends a QoS policy to the Serving GW, and the Serving GW initiates the delete bearer process according to the QoS policy.
  • Step 102 The service gateway selects a user mobility control management for deleting the bearer processing. And sending a delete bearer request message to the selected user mobility control management entity performing the delete bearer process.
  • the serving gateway selects according to the connection state of the UE, the activation state of the ISR function of the UE, and the current radio access type of the UE.
  • the specific selection method will be described in detail through the preferred embodiment of the present invention.
  • Step 103 The selected user mobility control management entity performs corresponding deletion bearer processing according to the delete bearer request message.
  • the MME sends an S1 interface application layer protocol (S1-AP) evolved radio access bearer release command message (E-RAB RELEASE COMMAND) to the base station, and if the bearer deletion process is triggered by a request of one UE, the MME establishes a bearer.
  • S1-AP S1 interface application layer protocol
  • E-RAB RELEASE COMMAND evolved radio access bearer release command message
  • the -AP E-RAB RELEASE COMMAND message carries this DEACTIVATE EPS BEARER CONTEXT REQUEST message;
  • the eNB sends an RRC connection reconfiguration message carrying the EPS radio bearer identifier to the UE to request to release the radio bearer corresponding to the EPS radio bearer identifier, if the S1-AP E-RAB RELEASE COMMAND message carries a NAS PDU, that is, the above
  • the RRC connection reconfiguration message also carries the NAS PDU, that is, the MME sends the NAS E-RAB RELEASE COMMAND Egression Radio Access Bearer Release Command message to the UE through the base station; Transmitting, by the UE, the EPS radio bearer identified by the RRC connection reconfiguration message, and notifying the status of the radio bearer to the UE NAS;
  • the UE NAS deletes the uplink TFT and the EPS 7 identification identifier according to the status information of the radio bearer from the UE RRC;
  • the UE sends an RRC connection reconfiguration complete message to the base station;
  • the base station sends a Sl-AP E-RAB RELEASE Response to the MME, and notifies the MME that the radio access bearer has been deleted.
  • the UE sends an RRC connection reconfiguration complete message to the base station; and the bearer context accept message is sent to the MME to notify the MME that the EPS bearer context has been deleted.
  • the PDN GW may send a delete bearer response message or send a complete message to the PCRF to delete the bearer.
  • the originator of the process knows that the specified bearer has been deleted.
  • the Serving GW is triggered by the PDN GW to initiate a delete bearer process.
  • 2 is a schematic flow chart of Embodiment 1 of the method of the present invention. As shown in Figure 2, the first embodiment includes the following steps:
  • Step 201 The PDN GW sends a delete bearer request message to the Serving GW.
  • the PDN GW triggers the Serving GW to initiate a delete bearer process by sending a delete bearer request message.
  • Step 202 after receiving the delete bearer request message, the Serving GW determines whether the ISR function of the UE has been activated, and if yes, proceeds to step 204, otherwise proceeds to step 203;
  • the Serving GW determines the ISR of the UE according to the context of the UE it holds. Whether the function has been activated.
  • Step 203 The Serving GW determines the current radio access type of the UE, and if it is UTRAN/GERAN, selects the SGSN as the user mobility control management entity that performs the bearer deletion process, and if it is the E-UTRAN, selects the MME to perform the bearer bearer process.
  • User mobility control management entity go to step 205;
  • Step 204 The Serving GW determines whether the UE is in an idle state, and if yes, selects the SGSN and the MME to jointly perform the user mobility control management entity for performing the deletion processing, otherwise selects the current user mobility control that establishes a signaling connection with the UE.
  • the management entity is a user mobility control management entity that performs the deletion processing;
  • This step is an operation performed when the ISR function of the UE is activated.
  • the Serving GW can determine whether the UE is in the connected state and the current user mobility control management when in the connected state according to the GTP-U tunnel established by the Serving GW. entity. If the Serving GW has established at least one GTP-U tunnel of the S1_U interface, the UE is in the connected state, and its current user mobility control management entity is the MME; if the Serving GW has established at least one GTP-U tunnel of the S4 interface, Alternatively, the GTP-U tunnel of the at least one S12 interface, the UE is in a connected state, and the current user mobility management control entity is an SGSN.
  • the UE that fails to activate the ISR function may not synchronize with the network on the ESM context or the SM context, resulting in an ESM context saved by the EPS bearer in the serving gateway and the MME.
  • the UE that fails to activate the ISR function may not synchronize with the network on the ESM context or the SM context, resulting in an ESM context saved by the EPS bearer in the serving gateway and the MME.
  • the Serving GW may further determine whether to select the SGSN or the MME as the delete bearer according to the session management context associated with the SGSN and the evolved packet system session management context associated with the MME.
  • Processed user mobility control management entity The specific method is:
  • Step 205 The monthly service gateway sends the delete bearer request message to the selected user mobility control management entity.
  • Step 206 The selected user mobility control management entity performs corresponding deletion bearer processing according to the delete bearer request message, and sends a delete bearer response message to the serving gateway after the processing is completed;
  • the SGSN performs the process of deleting the payload:
  • the SGSN After receiving the delete bearer request message, the SGSN determines whether the UE is in an idle state. If yes, deletes the PDP context corresponding to the bearer saved by itself and updates its session management context, otherwise initiates PDP context deactivation to the UE. a process and a radio access bearer (RAB) deletion process, and then deleting its own PDP context corresponding to the bearer and updating its session management context;
  • RAB radio access bearer
  • the MME performs the process of deleting the bearer:
  • the MME After receiving the delete bearer request message, the MME determines whether the UE is in an idle state. If yes, deletes the EPS bearer context corresponding to the bearer saved by the MME and updates its ESM context. Otherwise, the EPS bearer is deactivated to the UE.
  • the process and radio bearer (RB) deletion process then delete its own EPS bearer context corresponding to the bearer and update its evolved packet system session management context.
  • the PDP context deactivation process and the RAB deletion process are initiated to the UE, and
  • the EPS bearer deactivation process and the RB deletion process have been defined in the TS23.060 and TS23.401, respectively, and are not described here.
  • Step 207 After receiving the delete message sent by the selected user mobility control management entity, the serving gateway sends a delete message to the PDN GW.
  • step 201 implements step 101
  • steps 202, 203, 204, and 205 implement step 102
  • step 206 implements step 103
  • step 207 is further Sending a delete bearer response message to the PDN GW, so that the PDN GW learns that the bearer has been successfully deleted.
  • FIG. 3 is a schematic structural diagram of Embodiment 1 of the apparatus of the present invention. As shown in Figure 3, it mainly includes:
  • the message sending and receiving module 301 is configured to receive a message that triggers the service gateway to initiate the delete bearer process, and triggers the processing module 302 to execute; and sends a delete bearer request message to the user mobility control management entity selected by the processing module 302.
  • the processing module 302 is configured to select a user mobility control management entity that performs the bearer deletion process, and trigger the message sending and receiving module 301 to send a delete request message to the selected user mobility control management entity.
  • the activation determining unit 3021 is configured to determine whether the ISR function of the UE has been activated, and if the triggering idle determining unit 3023 performs, triggering the wireless access type determining unit 3022 to execute;
  • the radio access type determining unit 3022 is configured to determine a current radio access type of the UE, and if it is a UTRAN/GERAN, select the SGSN as the user mobility control management entity that performs the bearer deletion process, and trigger the message sending and receiving module 301 to send the delete bearer to the SGSN. Request cancellation If the E-UTRAN is selected, the MME is selected as the user mobility control management entity that performs the bearer deletion process, and the triggering message sending and receiving module 301 sends a delete bearer request message to the MME.
  • the idle determining unit 3023 is configured to determine whether the UE is in an idle state.
  • the SGSN and the MME are selected as the user mobility control management entity for performing the bearer deletion process, and the triggering message sending and receiving module 301 sends the delete bearer request message to the SGSN and the MME, otherwise the current management entity determining unit 3024 is triggered to execute;
  • the current management entity determining unit 3024 is configured to determine that the current user mobility control management entity that establishes a signaling connection with the UE, and if the SGSN is the SGSN, select the user mobility control management entity that performs the bearer bearer processing, and trigger the message sending and receiving module 301. Sending a delete bearer request message to the SGSN, and if the MME is the MME, selecting the user mobility control management entity for performing the bearer deletion process, the trigger message sending and receiving module 301 sends a delete bearer request message to the MME.
  • the message that the triggering service gateway receives the deletion of the bearer process by the messaging module 301 is usually sent by the PCRF. Therefore, the messaging module is configured to receive a delete bearer request message sent by the PDN GW or a QoS policy sent by the PCRF, and trigger the processing module to execute.
  • the processing module 302 may have another implementation structure.
  • the method includes: an activation determining unit 3021, a wireless access type determining unit 3022, and an idle determining unit 3027.
  • the activation determining unit 3021, the radio access type determining unit 3022, and the current management entity determining unit 3024 are the same as the activation determining unit 3021, the radio access type determining unit 3022, and the current management entity determining unit 3024 in FIG. 3, respectively. It will not be described here, and the difference from the structure in Figure 3 is:
  • the idle determining unit 3027 is configured to determine whether the UE is in an idle state, if yes, the trigger context determining unit 3025 performs, otherwise triggers the current management entity determining unit 3024. carried out;
  • the context determining unit 3025 is configured to determine whether the deleted bearer is included in the SM context information associated with the SGSN, and if yes, select the SGSN as the user mobility control management entity that performs the bearer processing, and trigger the message sending and receiving module 301 to The SGSN sends a delete bearer request message, and determines whether the deleted bearer is included in the ESM context information associated with the MME. If yes, the MME is selected as the user mobility control management entity that performs the bearer deletion process, and the trigger message sending and receiving module 301 sends the message to the MME. Delete the ⁇ request message.
  • the message sending and receiving module 301 is further configured to receive the delete bearer response message sent by the user mobility control management entity selected by the processing module 302, and forward the message to the The processing module 302 sends a delete bearer response message to the PDN GW or sends a complete message to the PCRF.
  • the processing module 302 further includes:
  • the response unit 3026 is configured to: when receiving the delete bearer response message sent by all the selected user mobility control management entities, trigger the messaging module 301 to send a delete bearer response message to the PDN GW or send a complete message to the PCRF.
  • the triggering message sending and receiving module 301 when the deletion bearer process is initiated by the PDN GW, the triggering message sending and receiving module 301 sends a delete bearer response message to the PDN GW, and when the delete bearer process is initiated by the PCRF, the message sending and receiving module is triggered. 301 sends a delete 7-load response message to the PCRF.
  • the present invention selects different conditions according to the connection state of the UE, the activation state of the ISR function of the UE, and the current radio access type of the UE.
  • the user mobility control management entity that deletes the bearer process is performed, and the method for deleting the bearer according to the present invention is not only applicable to the UE not activated ISR function or the UE by sending a delete request message to trigger the corresponding bearer process.
  • the ISR function is deactivated or the UE's ISR function is activated. The case when the UE is in the connected state is also applicable to the case where the UE is in an idle state after the ISR function of the UE is activated.

Description

一种删除承载的方法与装置
技术领域
本发明涉及移动通信技术,特别是涉及一种删除承载的方法与装置。 发明背景
在第三代合作项目的演进分组系统(EPS)中,采用了新的核心网体系 结构, 在该核心网体系结构中通用陆地无线接入网络 /全球移动通信系 统 I全球移动通信系统演进的增强数据率无线接入网络(UTRAN/GERAN) 和演进通用陆地无线接入网络(E-UTRAN)两种接入系统分别对应的用户 移动控制管理实体即服务通用分组无线业务服务节点 (SGSN )和移动性 管理实体(MME )是共同存在的。 为了适应于新的核心网体系结构下的 用户移动性管理, 演进分组系统中提出了一种空闲状态信令优化(I SR) 技术。 该技术可以减少空闲状态的用户终端(UE)驻留于 UTRAN/GERAN和 E-TURAN 两种接入系统的边界区域时移动性管理过程的信令量, 所述空 闲状态是指 UE 与当前驻留区所对应的用户移动控制管理实体之间没有 非接入层的信令连接。 当 UE 的 I SR 功能被激活时, UE将同时注册到 UTRAN/GERAN和 E-TURAN两种接入系统分别对应的用户移动控制管理实 体上, 即 SGSN和 MME , 此时, UE的月良务网关(Serv ing GW)也将与所述 SGSN和 MME同时保持 S 3接口和 S 11接口的 GTP控制平面 (GTP Cont ro l , GTP-C)连接, 即两个接口的 GTP-C连接。 激活 ISR功能后, 处于空闲状 态的 UE在 SGSN分配给 UE的路由区与匪 E分配给 UE的多个跟踪区之间 移动时, 无需作一般路由区更新或一般跟踪区更新操作, 由此可避免 UE 在 E和 SGSN管理的区域之间移动时可能产生的频繁的路由区或跟踪 区更新操作, 减少空口信令。 当 UE 的 I SR功能被激活后, 若 Serv ing GW与分组数据网络网关 (Packet Da ta Network Ga teWay , PDN GW)之间使用通用分组无线业务 ( GPRS )隧道协议, 则 UE的一个 EPS承载在匪 E , Serv ing GW及 PDN GW 上都保存有对应的 EPS承载上下文, 同时在 SGSN上也保存此 EPS承载 所对应的分组数据协议(PDP)上下文,并且此后需要 MME与 SGSN在 EPS承 载上下文与 PDP上下文上保持同步。 例如, 当 UE在 E-UTRAN接入系统 中激活了一个新 EPS承载, 之后回到 UTRAN/GERAN接入系统时, SGSN将 通过上下文同步的方式建立对应的 PDP上下文; 当 UE在 E-UTRAN接入 系统中删除了一个 EPS承载, 之后回到 UTRAN/GERAN时, SGSN将通过上 下文同步的方式删除对应的 PDP上下文; 当 UE在 UTRAN/GERAN接入的 一个 PDP上下文的 QoS被修改了, 之后 UE回到 E-UTRAN时, 匪 E将通过 上下文同步的方式, 修改对应的 EPS承载上下文的 QoS。 另外, 当 UE在 连接状态时其 ISR 功能被去激活后, UE 的当前用户移动控制管理实体 匪 E或 SGSN将通知 Serv ing GW此 UE的 I SR功能被去激活, Serv ing GW 将删除自身保存的另一用户移动控制管理实体所对应的演进分组系统 会话管理(ESM)或会话管理(SM)上下文。 例如, 当 UE处于连接状态时, 其当前用户移动控制管理实体 MME通知 Serv ing GW此 UE的 I SR功能被 去激活时, Serv ing GW将删除其保存的 SGSN所对应的 SM上下文。
现有的 EPS系统给出了由 PDN GW发起的删除 EPS承载的方法。 在该 方法中, PDN GW通过向 Serv ing GW发送删除承载请求, Serv ing GW将 根据删除^载请求触发 UE 的当前用户移动控制管理实体完成相应的删 除承载处理。 但是, 该方法仅适用于 UE未激活 I SR功能或 UE的 I SR功 能被去激活或 UE的 I SR功能被激活后 UE处于连接状态时的情况。因为, 当 UE未激活 ISR功能或 UE的 I SR功能被去激活时, 仅有一个用户移动 控制管理实体服务于该 UE , 相应的, 该 UE的用户移动控制管理实体与 该 UE的 Serving GW之间也只有一个 GTP-C连接。 当 UE的 ISR功能被 激活后处于连接状态时, 该 UE仅与其当前驻留区域所对应的用户移动 控制管理实体即当前用户移动控制管理实体保持非接入层的信令连接, 此时 Serving GW可以通过判断 S1—U接口的 GTP-U连接及 SGSN的通知 获知此 UE处于连接状态以及此 UE的当前用户移动控制管理实体是匪 E 还是 SGSN。因此,在上述情况下,采用现有删除 EPS承载的方法, Serving GW可以确定向 UE的当前用户移动控制管理实体发送删除^载请求消息 触发其完成相应的删除承载处理。 但是, 当 UE的 ISR功能被激活后处 于空闲状态时,由于 UE与 SGSN和 E均没有建立非接入层的信令连接, UE的 Serving GW与 SGSN和 E均保持了 GTP- C连接, 因此 Serving GW 无法确定触发哪个用户移动控制管理实体进行删除 EPS承载的处理, 并 确保删除 EPS 7|载后, MME与 SGSN在 EPS 7 载上下文与 PDP上下文上 保持同步。 如果 Serving GW只是向 SGSN发送删除承载请求消息或删除 PDP上下文请求消息, 而不向 MME发送删除^载请求消息, SGSN收到消 息后, 发现 UE处于空闲状态, 将不会寻呼 UE, 而只是在其 SM上下文中 删除 UE的一个 EPS 7 载上下文; 这样 SGSN与 Serving GW之间虽然实 现了在 EPS承载状态上的同步, 但匪 E却没有与 Serving GW及 SGSN在 EPS承载状态上实现同步, 即 MME上的 ESM上下文没有得到更新, 若 UE 此时位于 E-UTRAN,并且 UE与 MME之间即使通过 3艮踪区更新过程实现了 EPS承载的同步, 但因 E的 ESM上下文没有得到更新, E不知道所 述 EPS 7 载被删除, 所以 UE通过跟踪区更新过程也不能实现 UE与网络 在 EPS承载上的同步。 因此, 现有的由 PDN GW发起的删除承载的方法 不适用于 ISR功能被激活后 UE处于空闲状态的情况。
另外, 当 Serving GW与 PDN GW之间使用代理移动 IP (PMIP)协议 时, 策略与计费规则功能(PCRF)也可以触发服务网关(Serving GW) 发起删除承载过程。 同样的原因, 现有的由 PCRF发起的删除承载的方 法不适用于 I SR功能被激活后 UE处于空闲状态的情况。
综上所述,现有的由 PDN GW或 PCRF发起的删除承载的方法不适 用于 ISR功能被激活后 UE处于空闲状态的情况。 发明内容
有鉴于此,本发明的主要目的在于提供一种删除承载的方法与装置, 本发明不仅适用于 UE未激活 ISR功能或 UE的 ISR功能被去激活或 UE 的 ISR功能被激活后 UE处于连接状态时的情况, 还适用于 UE的 ISR 功能被激活后 UE处于空闲状态的情况。
为了达到上述目的, 本发明提出的技术方案为:
一种删除^载的方法, 该方法包括:
a、 触发服务网关发起删除承载过程;
b、服务网关选择进行删除承载处理的用户移动控制管理实体,并向 其发送删除^载请求消息;
c、所选择的用户移动控制管理实体根据所述删除承载请求消息进行 相应的删除承载处理。
如上所述的方法中,所述步骤 a中由 PDN GW或 PCRF触发服务网 关发起删除承载过程。
如上所述的方法中, 所述步骤 a为:
PDN GW向 Serving GW发送删除承载请求消息, Serving GW根据 所述删除承载请求消息发起删除承载过程; 或者,
PCRF向 Serving GW发送 QoS策略, Serving GW根据所述 QoS策 略发起删除承载过程。
如上所述的方法中,所述步骤 b中的所述选择根据 UE的连接状态、 UE的 ISR功能的激活状态以及 UE当前的无线接入类型进行。
如上所述的方法中, 所述步骤 b中服务网关选择进行删除承载处理 的用户移动控制管理实体的方法包括:
bll、 判断 UE的 ISR功能是否已被激活, 如果是则转入步骤 bl3, 否则转入步骤 bl2;
bl2、 判断 UE当前的无线接入类型, 如果是 UTRAN/GERAN, 则 选择 SGSN 为进行删除承载处理的用户移动控制管理实体, 如果是 E-UTRAN, 则选择 MME 为进行删除承载处理的用户移动控制管理实 体; 退出所述选择进行删除承载处理的用户移动控制管理实体的过程; bl3、 判断 UE是否处于空闲状态, 如果是则选择 SGSN和 MME共 同为进行删除承载处理的用户移动控制管理实体, 否则选择与所述 UE 建立了信令连接的当前用户移动控制管理实体为进行删除承载处理的 用户移动控制管理实体。
如上所述的方法中, 所述步骤 b中服务网关选择进行删除承载处理 的用户移动控制管理实体的方法包括:
b21、 判断 UE的 ISR功能是否已被激活, 如果是则转入步骤 b23 , 否则转入步骤 b22;
b22、 判断 UE当前的无线接入类型, 如果是 UTRAN/GERAN, 则 选择 SGSN 为进行删除承载处理的用户移动控制管理实体, 如果是 E-UTRAN, 则选择 MME 为进行删除承载处理的用户移动控制管理实 体, 退出所述选择进行删除承载处理的用户移动控制管理实体的过程; b23、 判断 UE是否处于空闲状态, 如果是则转入步骤 b24, 否则选 择与所述 UE建立了信令连接的当前用户移动控制管理实体为进行删除 承载处理的用户移动控制管理实体, 退出所述选择进行删除承载处理的 用户移动控制管理实体的过程; b24、判断 SGSN所关联的 SM上下文中是否包含所述承载,如果是 则选择 SGSN为进行删除承载处理的用户移动控制管理实体;判断 MME 所关联的 ESM 上下文中是否包含所述被删除的承载, 如果是则选择 MME为进行删除承载处理的用户移动控制管理实体。
如上所述的方法中, 所述步骤 c包括:
如果 SGSN为所选择的用户移动控制管理实体, 则 SGSN收到所述 删除承载请求消息后, 判断 UE是否处于空闲状态, 如果是则删除其自 身保存的与所述承载对应的 PDP上下文, 并更新其会话管理上下文, 否 则向 UE发起 PDP上下文去激活过程与无线接入承载 (RAB)删除过程, 然后删除其自身保存的与所述承载对应的 PDP上下文,并更新其会话管 理上下文;
如果 MME为所选择的用户移动控制管理实体, 则 MME收到所述 删除承载请求消息后, 判断 UE是否处于空闲状态, 如果是则删除其自 身保存的与所述承载对应的 EPS承载上下文,并更新其演进分组系统会 话管理上下文, 否则向 UE发起 EPS承载去激活过程与无线承载 (RB)的 删除过程, 然后删除其自身保存的与所述承载对应的 EPS承载上下文, 并更新其演进分组系统会话管理上下文。
如上所述的方法中, 所述步骤 c进一步包括:
如果 SGSN为所选择的用户移动控制管理实体, 则 SGSN进行相应 的删除承载处理后向服务网关发送删除承载响应消息;
如果 MME为所选择的用户移动控制管理实体, 则 MME进行相应 的删除承载处理后向服务网关发送删除承载响应消息;
所述步骤 c之后进一步包括:
如果所述步骤 a中由 PDN GW触发服务网关发起删除承载过程,则 当服务网关收到所选择的用户移动控制管理实体发送的删除承载响应 消息后, 服务网关向 PDN GW发送删除承载响应消息; 如果所述步骤 a中由 PCRF触发服务网关发起删除承载过程, 则当 服务网关收到所选择的用户移动控制管理实体发送的删除承载响应消 息后, 服务网关向 PCRF发送完成消息。
一种实现服务网关删除承载的装置, 该装置包括:
消息收发模块, 用于接收触发服务网关发起删除承载过程的消息并 触发处理模块执行; 向处理模块选择的用户移动控制管理实体发送删除 承载请求消息;
处理模块, 用于选择进行删除^载处理的用户移动控制管理实体, 并触发消息收发模块向所选择的用户移动控制管理实体发送删除承载 请求消息。
如上所述的装置中, 所述处理模块包括:
激活判断单元, 用于判断 UE的 ISR功能是否已被激活, 如果是触 发空闲判断单元执行, 否则触发无线接入类型判断单元执行;
无线接入类型判断单元, 用于判定 UE当前的无线接入类型, 如果 是 UTRAN/GERAN, 则选择 SGSN为进行删除承载处理的用户移动控 制管理实体, 触发消息收发模块向 SGSN发送删除承载请求消息, 如果 是 E-UTRAN, 则选择 MME为进行删除承载处理的用户移动控制管理 实体, 触发消息收发模块向 MME发送删除承载请求消息;
空闲判断单元, 判断 UE是否处于空闲状态, 如果是则选择 SGSN 和 MME共同为进行删除^载处理的用户移动控制管理实体, 触发消息 收发模块向 SGSN和 MME发送删除^载请求消息, 否则触发当前管理 实体判断单元执行;
当前管理实体判断单元, 用于判定与所述 UE建立了信令连接的当 前用户移动控制管理实体, 如果是 SGSN则选择 SGSN为进行删除承载 处理的用户移动控制管理实体, 触发消息收发模块向 SGSN发送删除承 载请求消息, 如果是 MME则选择 MME为进行删除承载处理的用户移 动控制管理实体, 触发消息收发模块向 MME发送删除承载请求消息。
如上所述的装置中, 所述消息收发模块, 进一步用于接收由 PDN GW发送的删除承载请求消息或由 PCRF发送的 QoS策略, 并触发所述 处理模块执行。
如上所述的装置中, 所述处理模块包括:
激活判断单元, 用于判断 UE的 ISR功能是否已被激活, 如果是则 触发空闲判断单元执行, 否则触发无线接入类型判断单元执行;
无线接入类型判断单元, 用于判定 UE当前的无线接入类型, 如果 是 UTRAN/GERAN, 则选择 SGSN为进行删除承载处理的用户移动控 制管理实体, 触发消息收发模块向 SGSN发送删除承载请求消息, 如果 是 E-UTRAN, 则选择 MME为进行删除承载处理的用户移动控制管理 实体, 触发消息收发模块向 MME发送删除承载请求消息;
空闲判断单元, 判断 UE是否处于空闲状态, 如果是则触发上下文 判断单元执行, 否则触发当前管理实体判断单元执行;
上下文判断单元, 用于判断 SGSN所关联的 SM上下文信息中是否 包含所述被删除的承载, 如果是则选择 SGSN为进行删除承载处理的用 户移动控制管理实体, 触发消息收发模块向 SGSN发送删除承载请求消 息;判断 MME所关联的 ESM上下文信息中是否包含所述被删除的承载, 如果是则选择 MME为进行删除承载处理的用户移动控制管理实体, 触 发消息收发模块向 MME发送删除承载请求消息;
当前管理实体判断单元, 用于判定与所述 UE建立信令连接的当前 用户移动控制管理实体, 如果是 SGSN则选择 SGSN为进行删除承载处 理的用户移动控制管理实体, 触发消息收发模块向 SGSN发送删除承载 请求消息; 如果是 MME则选择 MME为进行删除^载处理的用户移动 控制管理实体, 触发消息收发模块向 MME发送删除承载请求消息。
如上所述的装置中, 所述处理模块, 进一步包括: 响应单元, 用于 当收到所选择的用户移动控制管理实体发送的删除承载响应消息时, 触 发消息收发模块向 PDN GW发送删除承载响应消息或向 PCRF发送完成 消息;
所述消息收发模块, 进一步用于接收所述处理模块选择的用户移动 控制管理实体发送的删除承载响应消息并转发至处理模块; 向 PDN GW 发送删除 7|载响应消息或向 PCRF发送完成消息。
综上所述, 本发明提出的删除承载的方法和装置, 在 Serving GW收 到 PDN GW发送的删除承载请求消息后, 根据 UE的连接状态、 UE的 ISR功 能的激活状态以及 UE当前的无线接入类型, 选择不同情况下进行删除承 载处理的用户移动控制管理实体, 并通过发送删除承载请求消息触发其 进行相应的删除 载处理。 在上述方案中, 当 Serving GW判断出 UE的 ISR 功能已被激活且 UE处于空闲状态时, Serving GW可以确定出进行删除 载处理的用户移动控制管理实体, 触发所选择的用户移动控制管理实体 进行相应的删除承载处理, 从而使本发明不仅适用于 UE未激活 ISR功能 或 UE的 ISR功能被去激活或 UE的 ISR功能被激活后 UE处于连接状态时的 情况, 还适用于 UE的 ISR功能被激活后 UE处于空闲状态的情况。 附图简要说明
下面将通过参照附图详细描述本发明的示例性实施例, 使本领域的 普通技术人员更清楚本发明的上述及其它特征和优点, 附图中:
图 1为本发明方法的流程示意图;
图 2为本发明方法实施例一的流程示意图; 图 3为本发明装置的实施例一的结构示意图;
图 4为本发明装置中处理模块的一种结构示意图。 实施本发明的方式
为使本发明的目的、 技术方案和优点更加清楚, 下面将结合附图及 具体实施例对本发明作进一步地详细描述。
本发明的基本思想是: Serving GW被 PDN GW或 PCRF触发发起 删除承载的过程时, 根据 UE的连接状态、 UE的 ISR功能的激活状态 以及 UE当前的无线接入类型选择不同情况下进行删除承载处理的用户 移动控制管理实体, 并通过发送删除^^载请求消息触发所选择的用户移 动控制管理实体进行相应的删除承载处理。
图 1为本发明方法的流程图, 如图 1所示本发明删除承载的方法包 括:
步骤 101、 触发服务网关发起删除承载过程。
这里, 在实际应用中, 所述删除承载过程的发起是由 PDN GW或 PCRF 向服务网关发送触发服务网关发起删除承载过程的消息实现的, 所述消息可以指示删除一个承载, 也可以指示删除与所述 PDN连接的 所有承载。 本步骤的具体实现方法可以为:
PDN GW向 Serving GW发送删除承载请求消息, Serving GW根据 所述删除承载请求消息发起删除承载过程; 或者,
PCRF向 Serving GW发送 QoS策略, Serving GW根据所述 QoS策 略发起删除承载过程。
上述具体触发服务网关发起删除承载过程的方法为现有技术, 在此 不再赘述。
步骤 102、 服务网关选择进行删除承载处理的用户移动控制管理实 体, 并向所选择的进行删除承载处理的用户移动控制管理实体发送删除 承载请求消息。
这里,服务网关根据 UE的连接状态、 UE的 ISR功能的激活状态以 及 UE当前的无线接入类型进行选择, 具体的选择方法将通过本发明的 较佳实施例进行详细说明。
步骤 103、 所选择的用户移动控制管理实体根据所述删除承载请求 消息进行相应的删除承载处理。
本步骤中, 所述删除承载处理的具体方法为本领域人员公知, 为使 本发明技术方案更清楚, 下面以 MME的删除承载处理方法为例对本步 骤进行说明:
MME发送 S1接口应用层协议( S1-AP )演进无线接入承载释放命 令消息( E-RAB RELEASE COMMAND )给基站, 同时, 若该承载删除 过程由一个 UE 的请求所触发, 则 MME建立一个携带过程交互标识 ( Procedure Transaction Id, PTI )信元的非接入层 ( Non- Access Stratum, NAS )的去激活 EPS 7|载上下文请求消息( DEACTIVATE EPS BEARER CONTEXT REQUEST ), 并在发送给基站的 Sl-AP E-RAB RELEASE COMMAND 消息上携带此 DEACTIVATE EPS BEARER CONTEXT REQUEST消息;
基站发送携带 EPS无线承载标识的 RRC连接重配置消息给 UE以 请求释放此 EPS 无线承载标识所对应的无线承载, 如果所述 S1-AP E-RAB RELEASE COMMAND消息中携带了一个 NAS PDU , 即上面的 DEACTIVATE EPS BEARER CONTEXT REQUEST消息, 则该 RRC连 接重配置消息也携带该 NAS PDU, 也就是 MME通过基站将 NAS的 E-RAB RELEASE COMMAND演进无线接入承载释放命令消息发送给 UE; UE释放所述 RRC连接重配置消息所标识的 EPS无线承载,并通知 无线承载的状态给该 UE NAS;
该 UE NAS根据来自 UE RRC的无线承载的状态信息, 删除该上行 TFT和 EPS 7 载识别标识;
UE发送 RRC连接重配置完成消息给基站;
基站向 MME发送 Sl-AP E-RAB RELEASE Response 演进无线接入 承载释放响应消息, 通知 MME该无线接入承载已删除。
UE发送 RRC连接重配置完成消息给基站; 承载上下文接受消息给 MME,以通知 MME该 EPS承载上下文已删除。
这里, 在实际应用中, 当所选择的用户移动控制管理实体根据所述 删除承载请求消息完成了相应的删除承载处理后,可以向 PDN GW发送 删除承载响应消息或向 PCRF发送完成消息, 使删除承载过程的发起方 获知指定承载已被删除。
为了更好发说明本发明删除承载的方法, 下面用较佳实施例进行详 细描述。
本发明的实施例一中, 由 PDN GW触发 Serving GW发起删除承载 过程。 图 2为本发明方法的实施例一的流程示意图。 如图 2所示, 实施 例一包括以下步骤:
步骤 201、 PDN GW向 Serving GW发送删除承载请求消息; 这里, PDN GW通过发送删除承载请求消息触发 Serving GW发起 删除承载过程。
步骤 202、 Serving GW收到所述删除承载请求消息后判断 UE的 ISR 功能是否已被激活, 如果是则转入步骤 204, 否则转入步骤 203;
这里, Serving GW根据其保存的所述 UE的上下文判断 UE的 ISR 功能是否已被激活。
步骤 203、 Serving GW 判断 UE 当前的无线接入类型, 如果是 UTRAN/GERAN,则选择 SGSN为进行删除承载处理的用户移动控制管 理实体, 如果是 E-UTRAN, 则选择 MME为进行删除承载处理的用户 移动控制管理实体; 转入步骤 205;
步骤 204、 Serving GW判断 UE是否处于空闲状态, 如果是则选择 SGSN和 MME共同为进行删除^ ^载处理的用户移动控制管理实体, 否 则选择与所述 UE建立了信令连接的当前用户移动控制管理实体为进行 删除^载处理的用户移动控制管理实体;
本步骤是当 UE的 ISR功能已激活时执行的操作,此时, Serving GW 可以根据 Serving GW所建立的 GTP-U隧道, 判断出 UE是否处于连接 状态以及处于连接状态时的当前用户移动控制管理实体。若 Serving GW 已建立了至少一个的 S1_U接口的 GTP-U隧道, 则 UE处于连接状态, 并且其当前用户移动控制管理实体为 MME; 若 Serving GW已建立了至 少一个 S4接口的 GTP-U隧道, 或者, 至少一个 S12接口的 GTP-U隧 道, 则 UE处于连接状态, 并且其当前用户移动管理控制实体为 SGSN。
这里需要说明的是, 在实际应用中, 可能会由于激活 ISR功能后的 UE未能与网络在 ESM上下文或 SM上下文上实现同步, 导致出现一个 EPS承载在服务网关和 MME中所保存的 ESM上下文中存在而在服务 网关和 SGSN中所保存的 SM上下文中不存在, 或者, 一个 EPS承载 在服务网关和 MME中所保存的 ESM上下文中不存在而在服务网关和 SGSN中所保存的 SM上下文中存在的情况。针对上述情况,在步骤 204 中, 当判断 UE处于空闲状态时, Serving GW还可以根据 SGSN所关联 的会话管理上下文和 MME所关联的演进分组系统会话管理上下文确定 是否选择 SGSN或 MME为进行删除承载处理的用户移动控制管理实体, 具体方法为:
判断 SGSN所关联的 SM上下文中是否包含所述被删除的承载, 如 果是则选择 SGSN为进行删除承载处理的用户移动控制管理实体; 判断 MME所关联的 ESM上下文中是否包含所述被删除的承载,如果是则选 择 MME为进行删除承载处理的用户移动控制管理实体。
步骤 205、 月良务网关向所选择的用户移动控制管理实体发送所述删 除承载请求消息;
步骤 206、 所选择的用户移动控制管理实体根据所述删除承载请求 消息进行相应的删除承载处理, 并在所述处理完成后向服务网关发送删 除承载响应消息;
本步骤中,如果 SGSN为所选择的用户移动控制管理实体,则 SGSN 进行删除^载的处理包括:
SGSN收到所述删除承载请求消息后, 判断 UE是否处于空闲状态, 如果是则删除其自身保存的与所述承载对应的 PDP上下文,并更新其会 话管理上下文, 否则向 UE发起 PDP上下文去激活过程与无线接入承载 ( RAB )删除过程, 然后删除其自身保存的与所述承载对应的 PDP上下 文, 并更新其会话管理上下文;
如果 MME为所选择的用户移动控制管理实体, 则 MME进行删除 承载的处理包括:
MME收到所述删除承载请求消息后, 判断 UE是否处于空闲状态, 如果是则删除其自身保存的与所述承载对应的 EPS承载上下文,并更新 其 ESM上下文,否则向 UE发起 EPS承载去激活过程与无线承载( RB ) 删除过程, 然后删除其自身保存的与所述承载对应的 EPS承载上下文, 并更新其演进分组系统会话管理上下文。
这里, 向 UE发起 PDP上下文去激活过程与 RAB删除过程, 以及 向 UE发起 EPS承载去激活过程与 RB删除过程已分别在已在 TS23.060 中和 TS23.401中进行了定义, 此处不再赘述。
步骤 207、 服务网关收到所选择的用户移动控制管理实体发送的删 除 7|载响应消息后, 向 PDN GW发送删除 7|载响应消息。
上述技术方案中, 所述步骤 201实现了步骤 101 , 步骤 202、 203、 204和 205实现了步骤 102, 步骤 206实现了步骤 103 , 另外, 在本发明 的较佳实施例中, 还通过步骤 207向 PDN GW发送删除承载响应消息, 使 PDN GW获知所述承载已成功删除。
针对上述方法, 本发明还提出了一种删除承载的装置, 在实际应用 中, 该装置在 PDN GW、 PCRF、 服务网关、 SGSN、 MME和 UE上均 设有部分组件, 筒单起见, 这里, 仅对设于服务网关内的部分进行详细 说明, 图 3为本发明装置的实施例一的结构示意图。 如图 3所示, 其主 要包括:
消息收发模块 301 , 用于接收触发服务网关发起删除承载过程的消 息并触发处理模块 302执行; 向处理模块 302选择的用户移动控制管理 实体发送删除承载请求消息;
处理模块 302, 用于选择进行删除承载处理的用户移动控制管理实 体, 并触发消息收发模块 301向所选择的用户移动控制管理实体发送删 除^载请求消息; 其包括:
激活判断单元 3021 , 用于判断 UE的 ISR功能是否已被激活, 如果 是触发空闲判断单元 3023执行, 否则触发无线接入类型判断单元 3022 执行;
无线接入类型判断单元 3022, 用于判定 UE当前的无线接入类型, 如果是 UTRAN/GERAN, 则选择 SGSN为进行删除承载处理的用户移 动控制管理实体, 触发消息收发模块 301向 SGSN发送删除承载请求消 息, 如果是 E-UTRAN, 则选择 MME为进行删除承载处理的用户移动 控制管理实体,触发消息收发模块 301向 MME发送删除承载请求消息; 空闲判断单元 3023, 用于判断 UE是否处于空闲状态, 如果是则选 择 SGSN和 MME共同为进行删除承载处理的用户移动控制管理实体, 触发消息收发模块 301向 SGSN和 MME发送删除承载请求消息, 否则 触发当前管理实体判断单元 3024执行;
当前管理实体判断单元 3024, 用于判定与所述 UE建立了信令连接 的当前用户移动控制管理实体, 如果是 SGSN则选择 SGSN为进行删除 承载处理的用户移动控制管理实体, 触发消息收发模块 301向 SGSN发 送删除承载请求消息, 如果是 MME则选择 MME为进行删除承载处理 的用户移动控制管理实体, 触发消息收发模块 301向 MME发送删除承 载请求消息。
这里, 所述消息收发模块 301接收的所述触发服务网关发起删除承 载过程的消息通常由 PCRF发送的。 因此, 进一步地, 所述消息收发模 块用于接收由 PDN GW发送的删除承载请求消息或由 PCRF发送的 QoS 策略, 并触发所述处理模块执行。
需要说明的是, 在实际应用中, 所述处理模块 302还可以有另一种 实现结构, 如图 4所示, 其包括: 激活判断单元 3021、 无线接入类型判 断单元 3022、 空闲判断单元 3027、 当前管理实体判断单元 3024和上下 文判断单元 3025。 其中, 所述激活判断单元 3021、 无线接入类型判断 单元 3022和当前管理实体判断单元 3024分别与图 3中的激活判断单元 3021、无线接入类型判断单元 3022和当前管理实体判断单元 3024相同, 此处不再赘述, 与图 3中的结构不同之处在于:
所述空闲判断单元 3027, 用于判断 UE是否处于空闲状态, 如果是 则触发上下文判断单元 3025执行,否则触发当前管理实体判断单元 3024 执行;
所述上下文判断单元 3025 ,用于判断 SGSN所关联的 SM上下文信 息中是否包含所述被删除的承载, 如果是则选择 SGSN为进行删除承载 处理的用户移动控制管理实体, 触发消息收发模块 301向 SGSN发送删 除承载请求消息;判断 MME所关联的 ESM上下文信息中是否包含所述 被删除的承载, 如果是则选择 MME为进行删除承载处理的用户移动控 制管理实体, 触发消息收发模块 301向 MME发送删除^载请求消息。
在实际应用中,为了使 PDN GW或 PCRF获知所述承载已成功删除, 所述消息收发模块 301进一步用于接收所述处理模块 302选择的用户移 动控制管理实体发送的删除承载响应消息并转发至处理模块 302; 向 PDN GW发送删除承载响应消息或向 PCRF发送完成消息; 相应的, 如 图 3和图 4所示, 所述处理模块 302进一步包括:
响应单元 3026,用于当收到所有选择的用户移动控制管理实体发送 的删除承载响应消息时,触发消息收发模块 301向 PDN GW发送删除承 载响应消息或向 PCRF发送完成消息。
这里, 在实际应用中, 当所述删除承载过程由 PDN GW发起时, 则 触发消息收发模块 301向 PDN GW发送删除承载响应消息,当所述删除 承载过程由 PCRF发起时, 则触发消息收发模块 301向 PCRF发送删除 7 载响应消息。
从上述技术方案中可以看出, 本发明在 Serving GW收到 PDN GW 发送的删除承载请求消息后, 根据 UE的连接状态、 UE的 ISR功能的 激活状态以及 UE当前的无线接入类型选择不同情况下进行删除承载处 理的用户移动控制管理实体, 并通过发送删除^载请求消息触发其进行 相应的删除承载处理, 从而使本发明删除承载的方法和装置不仅适用于 UE未激活 ISR功能或 UE的 ISR功能被去激活或 UE的 ISR功能被激活 后 UE处于连接状态时的情况, 还适用于 UE的 ISR功能被激活后 UE 处于空闲状态的情况。
综上所述, 以上仅为本发明的较佳实施例而已, 并非用于限定本发 明的保护范围。 凡在本发明的精神和原则之内, 所作的任何修改、 等同 替换、 改进等, 均应包含在本发明的保护范围之内。

Claims

权利要求书
1、 一种删除承载的方法, 其特征在于, 该方法包括:
a、 触发服务网关 Serving GW发起删除承载过程;
b、服务网关选择进行删除承载处理的用户移动控制管理实体,并向 其发送删除^载请求消息;
c、所选择的用户移动控制管理实体根据所述删除承载请求消息进行 相应的删除承载处理。
2、根据权利要求 1所述的方法, 其特征在于, 所述步骤 a中由分组 数据网络网关 PDN GW或策略与计费规则功能 PCRF触发服务网关发起 删除承载过程。
3、 根据权利要求 2所述的方法, 其特征在于, 所述步骤 a为: PDN GW向 Serving GW发送删除承载请求消息, Serving GW根据 所述删除承载请求消息发起删除承载过程; 或者,
PCRF向 Serving GW发送 QoS策略, Serving GW根据所述 QoS策 略发起删除承载过程。
4、 根据权利要求 1至 3所述的任一方法, 其特征在于, 所述步骤 b 中的所述选择根据 UE的连接状态、 UE的 ISR功能的激活状态以及 UE 当前的无线接入类型进行。
5、根据权利要求 4所述的方法, 其特征在于, 所述步骤 b中服务网 关选择进行删除承载处理的用户移动控制管理实体的方法包括:
bl 1、判断用户设备 UE的空闲状态信令优化 ISR功能是否已被激活, 如果是则转入步骤 bl3 , 否则转入步骤 bl2;
bl2、 判断 UE当前的无线接入类型, 如果是通用陆地无线接入网络 /全球移动通信系统 /全球移动通信系统演进的增强数据率无线接入网 络 UTRAN/GERAN,则选择服务通用分组无线接入业务服务节点 SGSN 为进行删除承载处理的用户移动控制管理实体, 如果是演进通用陆地无 线接入网络 E-UTRAN, 则选择移动性管理实体 MME为进行删除 载 处理的用户移动控制管理实体; 退出所述选择进行删除^载处理的用户 移动控制管理实体的过程;
bl3、 判断 UE是否处于空闲状态, 如果是则选择 SGSN和 MME共 同为进行删除承载处理的用户移动控制管理实体, 否则选择与所述 UE 建立了信令连接的当前用户移动控制管理实体为进行删除承载处理的 用户移动控制管理实体。
6、根据权利要求 4所述的方法, 其特征在于, 所述步骤 b中服务网 关选择进行删除承载处理的用户移动控制管理实体的方法包括:
b21、 判断 UE的 ISR功能是否已被激活, 如果是则转入步骤 b23 , 否则转入步骤 b22;
b22、 判断 UE当前的无线接入类型, 如果是 UTRAN/GERAN, 则 选择 SGSN 为进行删除承载处理的用户移动控制管理实体, 如果是 E-UTRAN, 则选择 MME 为进行删除承载处理的用户移动控制管理实 体, 退出所述选择进行删除承载处理的用户移动控制管理实体的过程; b23、 判断 UE是否处于空闲状态, 如果是则转入步骤 b24, 否则选 择与所述 UE建立了信令连接的当前用户移动控制管理实体为进行删除 承载处理的用户移动控制管理实体, 退出所述选择进行删除承载处理的 用户移动控制管理实体的过程;
b24、判断 SGSN所关联的会话管理 SM上下文中是否包含所述承载, 如果是则选择 SGSN为进行删除承载处理的用户移动控制管理实体; 判 断 MME所关联的演进分组系统会话管理 ESM上下文中是否包含所述被 删除的承载, 如果是则选择 MME为进行删除承载处理的用户移动控制 管理实体。
7、 根据权利要求 4所述的方法, 其特征在于, 所述步骤 c包括: 如果 SGSN为所选择的用户移动控制管理实体, 则 SGSN收到所述 删除承载请求消息后, 判断 UE是否处于空闲状态, 如果是则删除其自 身保存的与所述承载对应的分组数据协议 PDP上下文,并更新其会话管 理上下文,否则向 UE发起 PDP上下文去激活过程与无线接入承载 RAB 删除过程, 然后删除其自身保存的与所述承载对应的 PDP上下文, 并更 新其会话管理上下文;
如果 MME为所选择的用户移动控制管理实体, 则 MME收到所述 删除承载请求消息后, 判断 UE是否处于空闲状态, 如果是则删除其自 身保存的与所述承载对应的 EPS承载上下文,并更新其演进分组系统会 话管理上下文, 否则向 UE发起 EPS承载去激活过程与无线承载 RB的 删除过程, 然后删除其自身保存的与所述承载对应的 EPS承载上下文, 并更新其演进分组系统会话管理上下文。
8、 根据权利要求 7所述的方法, 其特征在于, 所述步骤 c进一步包 括:
如果 SGSN为所选择的用户移动控制管理实体, 则 SGSN进行相应 的删除承载处理后向服务网关发送删除承载响应消息;
如果 MME为所选择的用户移动控制管理实体, 则 MME进行相应 的删除承载处理后向服务网关发送删除承载响应消息;
所述步骤 c之后进一步包括:
如果所述步骤 a中由 PDN GW触发服务网关发起删除承载过程,则 当服务网关收到所选择的用户移动控制管理实体发送的删除承载响应 消息后, 服务网关向 PDN GW发送删除承载响应消息;
如果所述步骤 a中由 PCRF触发服务网关发起删除承载过程, 则当 服务网关收到所选择的用户移动控制管理实体发送的删除承载响应消 息后, 服务网关向 PCRF发送完成消息。
9、 一种实现服务网关删除承载的装置, 其特征在于, 该装置包括: 消息收发模块, 用于接收触发服务网关发起删除承载过程的消息并 触发处理模块执行; 向处理模块选择的用户移动控制管理实体发送删除 承载请求消息;
处理模块, 用于选择进行删除^载处理的用户移动控制管理实体, 并触发消息收发模块向所选择的用户移动控制管理实体发送删除承载 请求消息。
10、根据权利要求 9所述的装置, 其特征在于, 所述消息收发模块, 进一步用于接收由 PDN GW发送的删除承载请求消息或由 PCRF发送的 QoS策略, 并触发所述处理模块执行。
11、根据权利要求 9所述的装置, 其特征在于, 所述处理模块包括: 激活判断单元, 用于判断 UE的 ISR功能是否已被激活, 如果是触 发空闲判断单元执行, 否则触发无线接入类型判断单元执行;
无线接入类型判断单元, 用于判定 UE当前的无线接入类型, 如果 是 UTRAN/GERAN, 则选择 SGSN为进行删除承载处理的用户移动控 制管理实体, 触发消息收发模块向 SGSN发送删除承载请求消息, 如果 是 E-UTRAN, 则选择 MME为进行删除承载处理的用户移动控制管理 实体, 触发消息收发模块向 MME发送删除承载请求消息;
空闲判断单元, 判断 UE是否处于空闲状态, 如果是则选择 SGSN 和 MME共同为进行删除承载处理的用户移动控制管理实体, 触发消息 收发模块向 SGSN和 MME发送删除^载请求消息, 否则触发当前管理 实体判断单元执行;
当前管理实体判断单元, 用于判定与所述 UE建立了信令连接的当 前用户移动控制管理实体, 如果是 SGSN则选择 SGSN为进行删除承载 处理的用户移动控制管理实体, 触发消息收发模块向 SGSN发送删除承 载请求消息, 如果是 MME则选择 MME为进行删除承载处理的用户移 动控制管理实体, 触发消息收发模块向 MME发送删除承载请求消息。
12、根据权利要求 9所述的装置, 其特征在于, 所述处理模块包括: 激活判断单元, 用于判断 UE的 ISR功能是否已被激活, 如果是则 触发空闲判断单元执行, 否则触发无线接入类型判断单元执行;
无线接入类型判断单元, 用于判定 UE当前的无线接入类型, 如果 是 UTRAN/GERAN, 则选择 SGSN为进行删除承载处理的用户移动控 制管理实体, 触发消息收发模块向 SGSN发送删除承载请求消息, 如果 是 E-UTRAN, 则选择 MME为进行删除承载处理的用户移动控制管理 实体, 触发消息收发模块向 MME发送删除承载请求消息;
空闲判断单元, 判断 UE是否处于空闲状态, 如果是则触发上下文 判断单元执行, 否则触发当前管理实体判断单元执行;
上下文判断单元, 用于判断 SGSN所关联的 SM上下文信息中是否 包含所述被删除的承载, 如果是则选择 SGSN为进行删除承载处理的用 户移动控制管理实体, 触发消息收发模块向 SGSN发送删除承载请求消 息;判断 MME所关联的 ESM上下文信息中是否包含所述被删除的承载, 如果是则选择 MME为进行删除承载处理的用户移动控制管理实体, 触 发消息收发模块向 MME发送删除承载请求消息;
当前管理实体判断单元, 用于判定与所述 UE建立信令连接的当前 用户移动控制管理实体, 如果是 SGSN则选择 SGSN为进行删除承载处 理的用户移动控制管理实体, 触发消息收发模块向 SGSN发送删除承载 请求消息; 如果是 MME则选择 MME为进行删除承载处理的用户移动 控制管理实体, 触发消息收发模块向 MME发送删除承载请求消息。
13、 根据权利要求 10至 12所述的任一装置, 其特征在于, 所述处 理模块, 进一步包括: 响应单元, 用于当收到所选择的用户移动控制管 理实体发送的删除承载响应消息时,触发消息收发模块向 PDN GW发送 删除承载响应消息或向 PCRF发送完成消息;
所述消息收发模块, 进一步用于接收所述处理模块选择的用户移动 控制管理实体发送的删除承载响应消息并转发至处理模块; 向 PDN GW 发送删除 7|载响应消息或向 PCRF发送完成消息。
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