WO2011017853A1 - 更新关联关系的方法以及分组域网元 - Google Patents
更新关联关系的方法以及分组域网元 Download PDFInfo
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- WO2011017853A1 WO2011017853A1 PCT/CN2009/073276 CN2009073276W WO2011017853A1 WO 2011017853 A1 WO2011017853 A1 WO 2011017853A1 CN 2009073276 W CN2009073276 W CN 2009073276W WO 2011017853 A1 WO2011017853 A1 WO 2011017853A1
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- network element
- domain network
- packet domain
- switching center
- mobile switching
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W60/00—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
- H04W60/04—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration using triggered events
Definitions
- the present invention relates to the field of communications, and in particular, to a method of updating an association relationship and a packet domain network element.
- BACKGROUND Currently, the standardization working group of the 3rd Generation Partnership Project (3GPP) is working on the wireless connection of a packet switched core (PS Core) and a universal mobile communication system. In the evolution of the Universal Mobile Telecommunication System Radio Access Network (UTRAN), this evolved mobile communication system is called an evolved packet i or system (Evolved Packet System, called EPS).
- EPS evolved Packet System 1 is a block diagram of the above system, in which only some entities related to the present invention are shown, including: a mobile station or a mobile terminal (Mobile Station, MS)/user equipment (User Equipment, UE) 101.
- Evolved Radio Access Network 102
- Mobility Management Entity MME
- GERAN UTRAN 104
- Serving GPRS Support Node SGSN
- MSC Mobile Switching Center
- VLR Visitor Location Register
- S-GW Serving Gateway
- Packet Data Network Packet Data Network Gateway
- the MS and the UE are uniformly represented by the UE in the following description.
- the MSC/VLR may also be a new functional entity MSC Server after the 3GPP R4 (Release 4) phase, which is uniformly represented by the MSC VLR in the following description.
- the following two states of the UE in the EPS network are related to the present invention: idle state and connected state.
- the idle state means that there is no signaling connection between the UE and the network.
- the location information of the UE in the MME is only accurate to the tracking. List of districts.
- the connection state refers to the existence of a signaling connection between the UE and the network.
- the signaling connection consists of two parts: a wireless connection between the UE and the E-UTRAN, and a signaling connection between the E-UTRAN and the MME, and the UE in the MME.
- the location information is accurate to the area identifier.
- Idle-mode Signaling Reduction is a mechanism for limiting the signaling of the UE in idle mode due to cell reselection between radio access technologies.
- GSM Global System for Mobile Communication
- UMTS Universal Mobile Telecommunication System
- EPS Universal Mobile Telecommunication System
- the registration information of the two networks so that the subsequent UEs do not perform the TAU and RAU procedures when switching between networks, that is, when the UE moves between the GSM UMTS and the EPS network, if the UE's routing area (GSM)
- GSM UE's routing area
- the location information of the UMTS network PS i or the UE and the tracking area list (the location information of the EPS network UE) have been registered, and the UE does not initiate the routing area update and the 3 track area update, so that the UE does not establish a connection with the network.
- the network does not know whether the UE is currently in the EPS network or the GSM UMTS network. ISR activation, in the case that both the UE and the network support the ISR function, the UE saves its
- the ISR is not activated, that is, only the access registration information of the EPS or the GSM UMTS PS is recorded in the UE, and only the MME or the SGSN retains the user information.
- the MME or the SGSN that receives the CS paging initiates paging of the network where the UE is located, and if the UE is in the idle state, the SGSN or the MME that establishes the ISR activation association with itself forwards the CS page to initiate the corresponding SGSN or MME.
- CS paging within the network ⁇ SGs and Gs association 1 MSC / VLR via the Gs association is referred, Gs association or relationship.
- the CSFB is attached or combined with the TAU/Location Area Update (LAU), and the Gs in the MSC VLR is associated between the MSC VLR and the MME.
- the CSFB attach is that the UE carries the CSFB indication information in the attach request message sent to the EPS, and the MME receives the attach request.
- the attachment process of the EPS network is performed, and the MME sends a location update request message to the MSC VLR to complete the registration update process of the UE in the CS domain.
- the MME generates a list of 3 traces according to the information such as the current tracking area identifier (tracking area identity) of the user, and sends the list to the UE in the attach accept message.
- the UE After receiving the attach accept message, the UE receives the attach accept message. Save the tracking area list and set the flag that the UE has updated in the EPS network.
- the UE After the CSFB attach process is completed, the UE is registered in the EPS network, the MME information is stored in the MSC VLR, the MSC VLR information is saved in the MME, and the SGs association relationship is established between the MSC/VLR and the MME.
- the joint TAU/LAU process is similar to the CSFB attach process described above. When the CSFB attachment or the joint TAU/LAU procedure is completed, the Gs association relationship in the MSC VLR stores the MME related information. In the second step shown in FIG.
- the UE when the UE moves from the EPS network to the GSM/UMTS network coverage, the UE performs cell reselection from the GSM/UMTS network and performs the joint routing area/location area update process due to signal quality and the like.
- the ISR is activated during the RAU procedure, and the Gs in the MSC VLR is associated between the MSC VLR and the SGSN. In this process, because the SGSN, the MME, and the UE both support the ISR function, the ISR is activated, and the MME continues to save the user context and the like.
- the SGSN carries the ISR activation information to the UE in the joint routing area update accept message, and the UE receives the message to identify the UE.
- Both the EPS network and the GSM/UMTS network PS domain are registered.
- the ISR is activated, the UE is already registered in the GSM UMTS network PS i or the EPS network, and the SGSN information is recorded in the Gs association relationship in the MSC/VLR.
- the third step shown in FIG. 2 the UE moves back to the tracking area included in the tracking area list already registered by the EPS network, and accesses in the tracking area included in the already registered tracking area list for a long time, that is, when the UE is from GSM/
- the UMTS network moves back to the EPS network, and in the tracking area included in the tracking area list already registered in the first step shown in FIG.
- the UE does not initiate the joint TAU. /LAU process, then the Gs association in the MSC VLR always keeps the SGSN information.
- the RAU process including the periodic RAU, is not performed on the GSM UMTS network.
- the UE may enter the connected state in the EPS network because of the service and the like, and the UE in the GSM/UMTS network is definitely in the idle state.
- the MME When the UE is in the connected state in the MME, if the MME receives the CS page, it will only initiate paging of the EPS network, and will not forward the CS page to the SGSN to trigger paging on the GSM UMTS network; and if it is the SGSN Receiving CS paging, because the UE is in the idle state in the SGSN, the SGSN does not know that the UE is in the connected state in the MME, the SGSN will initiate CS paging of the GSM UMTS network, and will forward the CS paging to the MME to trigger in the EPS. Network paging.
- the CS paging under the MME sends the CS paging message to the UE through the existing signaling connection; the CS paging under the SGSN is to page and send the CS paging message in all areas where the UE may be located.
- the CS paging under the SGSN To the UE, that is, paging needs to be performed in a relatively large range, but in fact, the CS paging process performed in the GSM/UMTS network cannot be paged to the UE, so the above paging process initiated by the SGSN is actually Wasting wireless resources. In the scenario shown in FIG.
- the wireless network resource can be saved, and the signaling load between the wireless network and the MME and the SGSN can be alleviated.
- the SGSN does not interact with the UE for a long time, when the SGSN detaches the UE, the SGSN sends a CS Domain Detach Indication message to the MSC VLR, and the MSC/VLR receives the message and deletes the Gs association. .
- the MSC/VLR will not notify the MME to perform CS paging in the EPS network, so that the UE is In this scenario, CS services such as calls and short messages cannot be received.
- the Gs association relationship in the MSC VLR stores the MME information
- the above problem also exists when the UE accesses the GSM/UMTS network for a long time.
- the solution to the above problem in the prior art is that the UE judges that the ISR is activated and the access and CS registration are performed in the EPS network.
- the periodic TAU and RAU timers are When performing TAU or RAU update, the UE always initiates a joint update instead of periodically updating.
- the solution in the prior art has the following disadvantages: It has specific requirements for the implementation of the terminal, which is not conducive to the opening of the terminal market. Once the terminal does not support the above implementation method, the user to which the terminal belongs cannot receive in the scenario shown in FIG. Paging to CS services such as calls and short messages. So a network-side solution is needed to solve the above problem.
- the present invention has been made in view of the need in the prior art for a joint update of a terminal to solve the problem that the association relationship under the ISR may not exist and be updated in time. Therefore, the main object of the present invention is to provide a method for updating an association relationship. And packet domain network elements to solve the above problems in the related art. According to an aspect of the present invention, a method of updating an association relationship is provided.
- the method for updating the association relationship includes: after the packet domain network element learns that the association relationship with the mobile switching center/visit location register needs to be updated, sending a location update request to the mobile switching center/visit location register, The mobile switching center/visit location register is updated with the association information according to the location update request.
- the foregoing packet domain network element is required to update the association relationship with the mobile switching center/visiting location register, which may be: the packet domain network element learns that the mobile switching center/visiting location needs to be updated according to the periodic update request message sent by the user equipment.
- the association of the registers may be: the packet domain network element learns that the mobile switching center/visiting location needs to be updated according to the periodic update request message sent by the user equipment.
- the foregoing packet domain network element is required to update the association relationship with the mobile switching center/visiting location register, which may be:
- a pair of packet domain network elements associated with the ISR activation are informed by the message interaction that the mobile switching center needs to be updated/ Visit the association of the location register.
- the association between the pair of packet domain network elements associated with the foregoing ISR activation and the need to update the association relationship with the mobile switching center/visiting location register may be: during a message interaction between a pair of packet domain network elements.
- the packet domain network element that has not interacted with the user equipment for more than a predetermined period of time notifies the peer packet domain network element that the association relationship needs to be updated; and whether the peer packet domain network element has an association relationship with the mobile switching center/visit location register, Decide whether to send a location update request to the Mobile Switching Center/Visit Location Register.
- the peer packet domain network element determines whether to send the location update request to the mobile switching center/visit location register according to whether the mobile switching center/visit location register has an association relationship, specifically: The peer packet domain network element determines to send a location update request to the mobile switching center/visit location register according to the received separate terminal notification message.
- the peer packet domain network element determines whether to send the location update request to the mobile switching center/visit location register according to whether the mobile switching center/visit location register has an association relationship, specifically: The peer packet domain network element determines to send a location update request to the mobile switching center/visit location register according to the received user equipment status query message. Preferably, the peer packet domain network element determines to send a location update request to the mobile switching center/visit location register according to the received update association notification message.
- the association between the pair of packet domain network elements associated with the ISR activation and the need to update the association relationship with the mobile switching center/visiting location register may be: during a message interaction between a pair of packet domain network elements, The packet domain network element that has not interacted with the user equipment for more than a predetermined period of time knows whether the peer packet domain network element has an association relationship with the mobile switching center/visit location register. And notifying the peer packet domain network element to update the association relationship; receiving the notified peer packet domain network element, and sending a location update request to the mobile switching center/visit location register.
- the packet domain network element that has not interacted with the user equipment for more than a predetermined time period knows whether the peer packet domain network element exists and the mobile switching center/visit location register Correlation of the relationship information, and notifying the peer packet domain network element to update the association relationship, specifically: the packet domain network element that has not interacted with the user equipment for more than the predetermined time period knows whether the peer packet domain network element is obtained through the state query process of the user equipment. There is association information with the mobile switching center/visit location register, and notification is made by updating the association message.
- the packet domain network element that has not interacted with the user equipment for more than a predetermined time period knows whether the peer packet domain network element exists and the mobile switching center/visit location register Correlation of the relationship information, and notifying the peer packet domain network element to update the association relationship is as follows:
- the packet domain network element that has not interacted with the user equipment for more than the predetermined duration determines whether the peer packet domain network element exists and moves through the ISR activation process.
- the association information of the switching center/visiting location register is notified by updating the association message or by adding the indication information in the separate user equipment notification message or the terminal status query message of the local network element.
- the foregoing packet domain network element is a mobility management entity and/or a GPRS monthly support node, where the mobility management entity and the GPRS service support node are separate network elements, combined network elements, or functionally integrated network elements. .
- the message interaction between the pair of packet domain network elements is performed by means of messages or internal messages between the network elements.
- a pair of packet domain network elements perform message interaction by means of internal messages, or by sharing data by using no message. Message interaction.
- a packet domain network element is provided.
- the packet domain network element includes: after learning that the association relationship with the mobile switching center/visit location register needs to be updated, sending a location update request to the mobile switching center/visit location register to enable the mobile switching center/visiting location
- the register updates the association information according to the location update request.
- the foregoing packet domain network element is a mobility management entity and/or a GPRS monthly support node.
- FIG. 1 is a schematic diagram of a related network system architecture in a GSM UMTS and EPS network in the prior art
- FIG. 2 is a schematic diagram of a scenario to be solved in the prior art
- FIG. 3 is a schematic diagram of an implementation according to the present invention.
- Figure 4 is a flow chart of a method for updating an association relationship;
- Figure 4 is a signaling flow chart according to Example 1 of the present invention;
- Figure 5 is a signaling flow chart according to Example 2 of the present invention;
- Figure 6 is a signaling according to Example 3 of the present invention
- Figure 7 is a signaling flow diagram in accordance with Example 4 of the present invention;
- Figure 8 is a signaling flow diagram in accordance with Example 5 of the present invention;
- Figure 9 is a signaling flow diagram in accordance with Example 6 of the present invention.
- FIG. 3 is a flowchart of a method for updating an association relationship according to an embodiment of the present invention. As shown in FIG. 3, the method includes:
- the PS domain network element sends a location update request to the MSC VLR after obtaining the association relationship with the MSC/VLR.
- the foregoing PS domain network element is an MME and/or an SGSN.
- the MSC VLR updates the association information according to the location update request. Through the above processing, it can be realized that in any case, the MSC VLR can always perform CS paging correctly.
- Example 1 the foregoing method for the PS domain network element to learn to update the association relationship with the MSC/VLR is as follows: The PS domain network element learns that the association relationship with the MSC/VLR needs to be updated according to the periodic update request message sent by the UE.
- . 4 is a schematic diagram of a process in which a PS domain network element learns to initiate a location update to an MSC VLR according to a periodic TAU or RAU request message sent by the UE. As shown in Fig. 4, the embodiment is applied to the cyclic TAU request message as shown in Fig. 4, A-401-402. When the periodic TAU timer expires in the UE, the UE initiates a periodic TAU procedure.
- the UE sends a periodic TAU request message to the MME; the MME receives the periodic TAU request message, and determines that if the current ISR is activated and there is SGs association information to the MSC VLR in the MME, then
- the MME sends a location update request message to the MSC VLR, and the MSC VLR receives the bit sent by the MME.
- the update request is set, and the associated information stored therein is updated to be information related to the MME.
- the flow of the instance applied to the periodic RAU request message is shown in Figure 4, B-401-402.
- the SGSN After receiving the periodic RAU request message, the SGSN determines that the current ISR is activated and there is Gs association information to the MSC VLR in the SGSN, then the SGSN to the MSC VLR The location update request message is sent, and the MSC VLR receives the location update request sent by the SGSN, and updates the associated information stored therein as information related to the SGSN.
- the process shown in FIG. 4 is implemented in the scenario shown in FIG. 2. After the second step shown in FIG. 2 is completed, the SGSN information is stored in the association relationship in the MSC VLR, and the MME and the SGSN are saved in the SGSN.
- the association information of the MSC VLR, and the ISR activation flag information is stored in the MME and the SGSN.
- the UE sends a periodic TAU request message to the MME.
- the MME determines that the ISR is activated and the MME exists and the MSC/ The MME establishes a location update request to the MSC/VLR, and the MSC VLR receives the location update request, and updates the associated relationship information stored therein as MME related information. Subsequently, when the MSC/VLR performs CS paging, the MSC VLR sends the CS page to the MME.
- the MME When the UE is in the connected state in the MME, the MME only needs to initiate the CS paging of the EPS network, and the CS is connected through the existing signaling connection.
- the paging is sent to the UE; when the UE is in the idle state in the MME, the MME initiates CS paging in the EPS network and forwards the CS page to the SGSN to initiate CS paging in the GSM UMTS network.
- the MSC/VLR When the SGSN sends a detachment indication message to the MSC/VLR because the UE does not interact with itself for a long time, the MSC/VLR does not delete the SGs association relationship with the MME, so that the subsequent MSC/VLR is based on The MME information saved in the association relationship may be paged to the UE.
- the PS domain network element initiates and updates the association relationship in the MSC VLR according to the periodic update request message sent by the UE, so that the UE can always be correctly paged during the terminating call.
- the method for obtaining the association relationship between the PS domain network element and the MSC VLR may be: The pair of PS domain network elements associated with the ISR activation are informed by the message interaction that the association relationship with the MSC VLR needs to be updated.
- the MME or the SGSN When the MME or the SGSN is activated, the following two methods are used to implement synchronous separation of terminal status information between the ISR activation NEs.
- One is that the MME or the SGSN queries the SGSN/MME associated with the ISR to activate the associated SGSN/MME to determine whether the UE is in an active state and whether the UE can be separated. This process is referred to as a UE status query procedure in the present invention.
- FIG. 6 shows that the PS network element learns that the association relationship with the MSC VLR needs to be updated according to the UE status query process related information.
- the other is a method in which the MME or the SGSN of the split UE notifies the associated SGSN/MME that the associated SGSN/MME has separated the UE.
- the PS network element learns that the association relationship with the MSC VLR needs to be updated according to the notification message.
- the method for updating the association relationship between the pair of PS domain network elements and the MSC VLR by using the message interaction between the pair of PS domain network elements may be: in a message interaction process between a pair of PS domain network elements, The PS domain network element that has not interacted with the UE for more than the predetermined duration informs the peer PS domain network element that the association relationship needs to be updated.
- the peer PS domain network element determines whether to associate with the MSC VLR to determine whether to the MSC/ The VLR sends a location update request.
- the peer PS domain network element determines whether to send the location update request to the MSC VLR according to whether the MSC VLR has an association relationship.
- the peer PS domain network element determines the MSC according to the received separate terminal notification message. /VLR sends a location update request.
- FIG. 5 is a schematic diagram of a process in which a PS domain network element needs to initiate a location update to an MSC VLR according to an ISR activation of a local network separate terminal notification message sent by a peer network element. In the process shown in FIG.
- the SGSN/MME that is associated with the ISR activation sends the local cell separation terminal notification message, and the SGSN/MME receives the notification message, saves the relevant information, and determines if it exists.
- the Gs/SGs association initiates a location update to the MSC VLR.
- the process shown in Figure 5 contains:
- A-501 and A-502 are applied to the MME to initiate a separate terminal operation, and the SGSN receives the notification message, and learns that the location update process to the MSC/VLR needs to be initiated; A-501, the MME separates the UE, and the MME sends the local network separate terminal notification message to the SGSN according to the ISR activation.
- the SGSN learns that the MME has or will separate the UE, and may need to update the association relationship with the MSC VLR.
- the SGSN sends a location update message to the MSC VLR, and the MSC VLR receives the location update message and updates the association relationship.
- the information saved in the information is SGSN related information;
- B-501 and B-502 are applied to the SGSN to initiate a separate terminal operation, and the MME receives the notification message, and learns that the location update process needs to be initiated to the MSC VLR;
- the SGSN separates the UE, and the SGSN sends the local network separation terminal notification message to the MME according to the ISR activation.
- the MME receives the message, learns that the SGSN has or will separate the UE, may need to update the association relationship with the MSC VLR, and the MME sends a location update message to the MSC VLR, and the MSC VLR updates the association after receiving the location update message.
- the information saved in the MME is related information.
- the flow of the embodiment shown in FIG. 5 applied to the scenario shown in FIG. 2 is as follows.
- the SGSN separates the UE because the UE does not interact with it for a long time.
- the SGSN sends a message to the MME notifying the MME that it has or is separating the UE, and the MME receives the notification message, knowing that the ISR is deactivated and needs to update the association relationship.
- the MME sends a location update request to the MSC VLR, and the MSC/VLR receives the location update request message, and updates the information stored in the association relationship to the MME related information.
- the peer PS domain network element determines whether to send a location update request to the MSC/VLR according to whether the peer PS domain network element has an association relationship with the MSC VLR. Specifically, the peer PS domain network element performs the query according to the received UE status. The message determines to send a location update request to the MSC VLR.
- FIG. 6 shows a flow in which the PS domain network element learns that a location update needs to be initiated to the MSC VLR through the UE status query message. In the process shown in FIG.
- the MME/SGSN sends a UE status inquiry message to the associated SGSN/MME of the ISR activation before the UE is separated, and the SGSN/MME receives the UE status inquiry message, and learns the association associated with the ISR activation.
- the MME/SGSN does not interact with the UE for a long time, and determines that if there is an association relationship, a location update request is sent to the MSC VLR to update the association relationship.
- the process shown in Figure 6 contains:
- A-601 and A-602 are applied to the MME.
- the timer is applied to the MME.
- the UE does not interact with the UE for a long time.
- the UE sends a UE status query message to the SGSN.
- the SGSN receives the UE status query message and learns that it needs to initiate the MSC VLR. Location update process;
- the MME determines that there is no interaction with the UE for a long time, determines whether the UE needs to be separated, and sends a UE status query message to the SGSN.
- the SGSN receives the UE status query message, and learns that there is no interaction between the MME and the UE for a long time, and determines that if there is a Gs association relationship, the location update request is sent to the corresponding MSC VLR to update the association relationship.
- the MSC VLR updates the information stored in the association relationship to the SGSN related information;
- B-601 and B-602 are applied to the SGSN in the present instance, and the UE does not interact with the UE for a long time.
- the MME sends a UE ⁇ dog state query message, and the MME receives the UE ⁇ dog state query message, and the P needs to initiate a location update process to the MSC VLR;
- the SGSN determines that there is no interaction with the UE for a long time, determines whether the UE needs to be separated, and sends a UE ⁇ dog state query message to the MME.
- the MME receives the UE status query message, and learns that the SGSN is long between the UE and the UE.
- a location update request is sent to the corresponding MSC VLR to update the association relationship.
- the MSC VLR receives the location update message, and updates the information saved in the association relationship to the MME directory information.
- the SGSN sends a UE status query message to the MME before the UE is separated because the SGSN does not interact with the UE for a long time.
- the MME receives the UE status query.
- the message that the SGSN associated with the ISR activation has no interaction with the UE for a long time needs to send a location update message to the MSC/VLR to update the association relationship saved in the MSC VLR.
- the MME sends a location update request to the MSC VLR, and the MSC VLR receives the location update request message, and updates the information stored in the association relationship to the MME related information.
- FIG. 5 and FIG. 6 are implemented by the ISR activation notification and status query information interaction process between network elements.
- Example 4 the peer PS domain network element determines to send a location update request to the MSC/VLR according to the received update association notification message.
- the interaction process is not performed by the ISR-related UE status query or the local network element deletion UE notification message, but is implemented by the newly added update association notification message.
- the MME or the SGSN When transmitting the detached UE indication message to the MSC VLR, the MME or the SGSN sends an update association relationship notification message to the associated SGSN/MME to notify the SGSN/MME to send a location update to the MSC VLR to update the Gs/SGs association; SGSN/MME After the ⁇ : to the message, it is judged that if there is a Gs/SGs association relationship, the update process to the MSC/VLR is initiated.
- the process shown in Figure 7 includes:
- the MME When the MME separates the UE from the A-701 and the A-702, when the MME sends a separate UE indication message to the MSC/VLR, the MME sends an update association relationship notification message to the SGSN associated with the ISR activation, and the SGSN receives the update. Correlate the notification message, and know that it needs to initiate location update to the MSC/VLR: ⁇ ;
- the MME separates the UE, and sends an update association relationship notification message to the ISR activation associated SGSN when transmitting the split UE indication message to the MSC VLR;
- the SGSN receives the update association relationship notification message, and sends the update association relationship notification message to the corresponding MSC VLR.
- a location update request message to update the association.
- the MSC VLR receives the location update message, and updates the information saved in the association relationship to the SGSN related information;
- the SGSN When the SGSN sends a separate UE indication message to the MSC/VLR, the SGSN sends an update association relationship notification message to the MME associated with the ISR activation, and the MME receives the update. Correlate the notification message, and know that it needs to initiate location update to the MSC/VLR: ⁇ ;
- Step B-701 the SGSN separates the UE, and sends an update association relationship notification message to the associated MME when the MME VLR sends the split UE indication message;
- Step B-702 the MME receives the update association information p message, sends a location update request message to the corresponding MSC VLR to update the association relationship, and the MSC/VLR receives the location update message, and updates the information stored in the association relationship to be the MME related information. information.
- the process shown in Figure 7 is applied to the scenario shown in Figure 2.
- the SGSN does not interact with the UE for a long time.
- the SGSN sends the separated UE indication information to the MSC VLR in the process of separating the UE, the SGSN sends the SGSN to the MME.
- the MME sends an update association notification message
- the MSC VLR receives the notification message to the MSC VLR to send a location update request
- the MSC VLR receives the location update request message, and updates the information stored in the association relationship to the MME.
- the three implementation modes shown in FIG. 5, FIG. 6 and FIG. 7 are all cases in which the PS i or the network element of the UE to be separated does not know whether the SGs/Gs association exists in the PS network element associated with the ISR activation, and the ISR activation is performed by the ISR.
- the associated PS network element receives the relevant message to determine whether it has an SGs/Gs association relationship, and whether it needs to update the association relationship, thereby initiating the update process.
- the update of the association relationship information in the MSC VLR is implemented.
- the association between the pair of PS domain network elements associated with the ISR activation needs to be updated by the message interaction to update the association relationship with the MSC VLR, which is specifically: During the message interaction process of a pair of PS domain network elements, Correlation relationship information of the MSC/VLR, and notifying the peer packet domain network element to update the association relationship; receiving the notified peer PS domain network element, and sending a location update request to the MSC VLR.
- the PS domain network element that has not interacted with the UE for more than a predetermined period of time knows whether the peer PS domain network element has the association information with the MSC/VLR, and
- the notification of the update of the association relationship between the peer packet domain network element is as follows: The PS domain network element that has not interacted with the UE for a predetermined period of time is informed by the state query process of the UE whether the peer packet domain network element exists and the MSC exists. /VLR association information, and notification by updating the association message.
- the PS i or the network element that separates the UE has learned that the PS network element associated with the ISR activation has an SGs/Gs association, and sends an update association relationship message to notify the ISR to activate the associated PS.
- the network element updates the association relationship.
- the process shown in Figure 8 is that the PS network element has been queried through the status. The process knows whether the PS network element associated with the ISR activation has an SGs/Gs association.
- the MME/SGSN sends a UE status query message to the associated SGSN/MME for the ISR activation before the UE is separated.
- the SGSN/MME receives the query message, and newly adds itself in the response message.
- the MME/SGSN receives the information, and if the SGSN/MME associated with the ISR activation has a Gs/SGs association, the SGSN/MME associated with the ISR sends an update association relationship message to notify the SGSN/MME to initiate the MSC. VLR location update process. If there is no Gs/SGs association, the SGSN/MME associated with the ISR activation is not sent; the SGSN/MME receives the update Gs/SGs association message, and initiates a location update process to the MSC/VLR.
- the process shown in Figure 8 contains:
- A-801-804 is a processing flow applied to the scenario where the MME timer is applied in this embodiment.
- the MME determines that there is no interaction with the UE for a long time, determines whether the UE needs to be separated, and sends the UE to the SGSN! A dog-side query request message;
- the SGSN receives the UE ⁇ dog state query message, and returns a query response message to the MME, where the message carries a new Gs association relationship information with the MSC VLR;
- the MME receives the response message, and when the UE is determined to be separated, sends a separate UE indication message to the MSC VLR, and determines whether the SGSN associated with the ISR activation has a Gs association. If there is an association relationship, the MME activates the associated SGSN to the ISR. Sending an update association notification message, otherwise the update association notification message is not sent;
- the SGSN receives the update association notification message, send a location update request to the corresponding MSC VLR to update the association relationship.
- the MSC VLR receives the location update message, and updates the information saved in the association relationship to the SGSN related information;
- B-801-804 is the processing flow in the scenario where the SGSN timer is applied to the scenario; B-801, the SGSN determines that there is no interaction with the UE for a long time, determines whether the UE needs to be separated, and sends the UE to the MME! Dog state query request message;
- the MME receives the UE ⁇ dog state query message, and returns an inquiry response message to the SGSN, where the message carries the SGs association relationship information between the MSC and the MSC VLR.
- the SGSN receives the response message information, and when the UE is determined to be separated, sends a separate UE indication message to the MSC VLR, determines whether the MME associated with the ISR is activated, and whether there is an SGs association. If there is an association relationship, the SGSN activates the ISR.
- the associated MME sends an update association relationship notification message, otherwise, the update association relationship notification message is not sent; B-804, if the MME receives the update association relationship notification message, sends a location update request to the corresponding MSC VLR to update the association relationship.
- the MSC VLR receives the location update message, and updates the information saved in the association relationship to the MME related information.
- the process shown in Figure 8 is applied to the scenario shown in Figure 2.
- the SGSN sends a UE status query message to the MME before the UE is separated because the SGSN does not interact with the UE for a long time.
- the MME connects to the query.
- the message in the query response message, carries the SGs association information between itself and the MSC/VLR, and the SGSN receives the query response message, and sends an update association relationship message to the MME to notify the MME to initiate location update to the MSC VLR, MME.
- the MSC VLR receives the location update request message, and updates the information stored in the association relationship to the MME related information.
- the PS domain network element that has not interacted with the UE for more than a predetermined duration knows whether the peer PS domain network element has the association relationship with the MSC/VLR.
- the PS network element learns whether the PS network element associated with the ISR activation has an SGs/Gs association through the ISR activation process. In the example shown in FIG.
- the MME and the SGSN transmit and acquire SGs/Gs association information during the ISR activation process, and notify the ISR to activate the associated PS network element to initiate location update to the MSC/VLR when the PS network element separates the UE.
- the process shown in Figure 9 contains:
- the UE sends a TAU/RAU update request message to the MME/SGSN, where the message includes the ISR capability of the terminal.
- the MME/SGSN sends a context request as a context request direction SGSN/MME in the update process.
- the SGSN/MME is used as the context request response direction.
- the MME/SGSN sends a context response, which carries its own ISR capability, and whether association information has been established. Whether or not the relationship information has been established can be realized by adding a new information field or expanding an existing field;
- the context requester MME/SGSN receives the context response message, and determines whether the ISR needs to be activated. If the ISR activation condition is met, the ISR is activated and the Gs/SGs association information is already established. Otherwise, the ISR is not activated.
- the MME/SGSN notifies the context request responder SGSN/MME whether the current ISR is activated by the ISR activation flag, and whether the SGSN/MME itself establishes the SGs/Gs association information by whether the association relationship information has been established, and the SGSN/MME receives the SGs/Gs association information. The message, whether the MME/SGSN associated with the ISR activation is established to establish SGs/Gs association information;
- the MME/SGSN sends an update accept message to the UE, where the ISR activation flag information is carried.
- the UE receives the update receiving information, and learns whether the ISR is activated according to the flag information therein. 906.
- the MME/SGSN determines whether the SGSN/MME associated with the ISR activation learned by the ISR activation process has Gs/MME.
- the SGs association information determines whether to notify the SGSN/MME to initiate an update procedure to the MSC/VLR.
- the MME/SGSN sends a notification message to the SGSN/MME associated with the ISR; the notification message may have multiple implementation manners, for example, by means of a new update association relationship notification message, notification and update.
- the process of the association relationship is as shown in FIG. 7 .
- the procedure for notifying and updating the association relationship is similar to that of FIG. 6 by adding the indication information to the UE status query message; or adding the indication information by separating the UE notification message in the local network element.
- the way, the process of notifying and updating the relationship is similar to Figure 5.
- the SGSN/MME receives the notification message, and sends a location update request to the MSC VLR.
- the MSC VLR receives the location update request message, and updates the information stored in the association relationship to the information of the SGSN/MME.
- the UE may not carry its own ISR capability information in the update request message, but specify or default that all UEs capable of accessing the EPS and the GSM UMTS network have an ISR file.
- the process shown in Figure 9 is applied to the scenario shown in Figure 2 when the new update association notification message is implemented.
- the SGSN sends a context request message to the MME.
- the MME sends the SGs association information between itself and the MSC VLR in the context response message sent to the SGSN.
- the SGSN receives the context response message, and the MME has established the SGs association information.
- the ISR is activated.
- the SGSN carries the ISR activation flag in the context response message sent to the MME, and carries the Gs association information between itself and the MSC/VLR.
- the MME receives the context response message, and saves the SGSN to establish the Gs association information.
- the MSC VLR sends the separation indication information message
- the SGSN determines that it is in the ISR activation state and performs ISR association with itself.
- the MME has an SGs association relationship, and the SGSN sends an update association relationship notification message to the MME, informing the MME to initiate a location update process to the MSC VLR.
- the MME receives the update association relationship notification message, initiates a location update process to the MSC VLR, and the information stored in the MSC VLR update association relationship is MME related information.
- the method of the embodiment of the present invention is applied to the association relationship of the MSC VLR to store the MME information.
- the technical solution shown in the present invention requires the MME and the SGSN to add some processing logic, but the solution that the UE always initiates the joint update process when periodically updating the UE reduces the processing requirements and dependencies on the UE, and the UE periodic timer.
- the solution to launch a joint update can coexist.
- the processing of the network element by tampering with the MME and the SGSN by the cartridge 4 can reduce the processing requirements and dependencies on a large number of UEs accessing the pair of network elements.
- Apparatus Embodiments According to an embodiment of the present invention, a packet domain network element is provided.
- the packet domain network element is configured to send a location update request to the mobile switching center/visit location register after learning that the relationship with the mobile switching center/visit location register needs to be updated, so that the mobile switching center/visit location register is updated according to the location request Update the relationship information.
- the foregoing packet domain network element is a mobility management entity and/or a GPRS monthly support node.
- the method and system provided by the embodiments of the present invention are applicable not only to the scenario in which the MME and the SGSG are separate network elements, but also to the scenarios in which the MME and the SGSN are the combined network elements.
- the interaction message between the MME and the SGSN may be implemented by using a message between the MME and the internal message.
- the MME and the SGSN are functionally integrated network elements. It can be implemented by means of internal messages or by means of shared data or the like without a message.
- the foregoing packet domain network element is a network element or a functional network element that is combined with the MME/SGSN.
- the association relationship can be updated in time, and the MSC VLR can always correctly perform CS paging in all application scenarios, thereby reducing waste of wireless network resources and reducing network signaling load.
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Description
更新关联关系的方法以及分组域网元
技术领域 本发明涉及通信领域, 并且特别地, 涉及一种更新关联关系的方法以及分 组域网元。 背景技术 目前,第三代合作伙伴计划( 3rd Generation Partnership Project,筒称 3GPP ) 的标准化工作组正致力于研究对分组交换核心网 (Packet Switched Core, 筒称 PS Core )和通用移动通信***无线接入网( Universal Mobile Telecommunication System Radio Access Network, 筒称 UTRAN ) 的演进, 这个演进的移动通信系 统被称为演进的分组 i或*** ( Evolved Packet System, 筒称 EPS )。 图 1为上述***的构架图, 其中仅示出了与本发明有关的部分实体,具体 包括: 移动台或者称为移动终端 (Mobile Station, 筒称 MS)/用户设备 ( User Equipment, 筒称 UE ) 101、 演进的无线接入网 (E-UTRAN ) 102、 移动性管 理实体( Mobility Management Entity, 筒称 MME ) 103、 GERAN UTRAN 104、 GPRS服务支持节点(Serving GPRS Support Node, 筒称 SGSN) 105、 移动交换 中心( Mobile Switching Center, 筒称 MSC ) /拜访位置寄存器 ( Visitor Location Register, 筒称 VLR ) 106、 月 务网关( Serving Gateway , 筒称 S-GW)和分组数 据网网关 ( Packet Data Network Gateway, 筒称 PDN GW或 P-GW ) 107。
MS和 UE在以下的描述中统一使用 UE来表示。 MSC/VLR也可以是 3GPP R4 ( Release 4 ) 阶段后的新功能实体 MSC Server, 在以下的描述中统一用 MSC VLR来表示。 UE在 EPS 网络中以下的两个状态和本发明相关: 空闲态 和连接态。 空闲态是指 UE和网络之间没有信令连接存在, 在 E-UTRAN中不 存在 UE的上下文信息, E-UTRAN和 MME之间不存在信令连接, MME 中 UE 的位置信息只准确到跟踪区列表。 连接态是指 UE和网络之间有信令连接 存在,该信令连接由两部分组成: UE与 E-UTRAN之间的无线连接和 E-UTRAN 与 MME之间的信令连接 , MME中 UE的位置信息准确到 、区标识。 空闲模式下节约信令 ( Idle-mode Signaling Reduction, 筒称 ISR ) 是一种 用来限制 UE在空闲模式因为进行无线接入技术之间小区重选带来的信令的机 制。 当 UE在全球移动通讯***( Global System for Mobile Communication, 筒
称 GSM )/通用移动通信*** (Universal Mobile Telecommunication System, 筒称 UMTS)网络和 EPS网络双覆盖区域处于空闲模式时,因为移动或者无线信号强 度发生变化等原因, 可能会在 GSM UMTS和 EPS接入方式之间频繁切换, 从 而因为需要不断进行路由区更新 (Routing Area Update, 筒称 RAU, UE 在 GSM/UMTS网络 PS i或更新位置的过程 )和 3艮踪区更新 ( Tracking Area Update , 筒称 TAU, UE在 EPS网络更新位置的过程) 带来大量信令交互。 为了减少上述的信令交互过程给网络带来的信令负荷, 3GPP中 ISR解决 方案的主要思想就是当 UE和网络都支持 ISR功能时, SGSN和 MME都保存 用户上下文信息, UE 中也保存在两个网络的注册信息, 这样后续 UE再在网 络之间切换时就不进行 TAU和 RAU过程,也就是说,后续当 UE在 GSM UMTS 和 EPS网络之间移动时, 如果 UE的路由区 ( GSM UMTS网络 PS i或 UE的位 置信息) 和跟踪区列表(EPS 网络 UE的位置信息) 已经注册过, UE就不会 发起路由区更新和 3艮踪区更新, 从而在 UE没有建立和网络的连接时, 网络不 知道 UE当前处于 EPS网络还是 GSM UMTS网络。 ISR激活 , 就是在 UE和网络都支持 ISR功能的情况下 , UE中保存其在
EPS和 GSM/UMTS PS两个网络的注册信息, MME和 SGSN同时保存用户的 信息和 ISR激活标志的情况 , MME和 SGSN保存对方的信息 ,并称 SGSN/MME 为 ISR激活关联的 SGSN/MME。 ISR没有激活, 就是在 UE中只记录其在 EPS 或者 GSM UMTS PS的接入注册信息, 只有 MME或者 SGSN中保留用户信息 的情况。 为了保证在 ISR激活情况下 MSC VLR能够寻呼到 UE, 并且基于对 MSC/VLR影响最小、实现筒单和 MSC VLR不需要关心 ISR这个纯粹 PS域的 概念等考虑, 现有电路域回落( CS fallback, 筒称 CSFB )技术中 ISR下 CS寻 呼的方法是在 MSC VLR中只保存与最近一个发来位置更新请求的 MME之间 的 SGs或者 SGSN之间的 Gs关联关系, 当进行 CS寻呼时, 由接收到 CS寻呼 的 MME或者 SGSN发起自己所在网络的寻呼, 同时, 如果 UE处于空闲态也 给与自己建立 ISR激活关联的 SGSN或者 MME转发 CS寻呼以发起在相应 SGSN或者 MME所在网络内的 CS寻呼。 在下面的描述中^1 MSC/VLR中的 SGs和 Gs关联关系通称为 Gs关联关系、 Gs关联或关联关系。 下面结合图 2说明引入 ISR后现有技术中存在的问题。 在图 2所示第一 步, CSFB附着或者联合 TAU/位置区更新( Location Area Update , 筒称 LAU ) , MSC VLR中的 Gs关联在 MSC VLR和 MME之间。 CSFB附着是 UE在发给 EPS的附着 ( attach )请求消息中携带 CSFB指示信息, MME接收到附着请求
消息后 , 进行 EPS网络的附着流程 , 并且 MME给 MSC VLR发送位置更新请 求消息来完成 UE在 CS域的注册更新过程。 在该过程中 , MME才艮据用户当前 的 艮踪区标识 ( Tracking Area Identity , 筒称 ΤΑΙ ) 等信息生成3艮踪区列表并在 附着接受消息中带给 UE, UE 接收到附着接受消息后保存跟踪区列表和设置 UE在 EPS网络中已经更新的标志。 在 CSFB附着过程完成后, UE在 EPS网 络已经注册, MSC VLR中保存 MME信息, MME 中保存 MSC VLR信息, MSC/VLR与 MME之间建立了 SGs关联关系。联合 TAU/LAU过程和上述 CSFB 附着过程类似。 当完成 CSFB附着或者联合 TAU/LAU过程时, MSC VLR中 Gs关联关系保存的是 MME相关信息。 图 2所示第二步, 当 UE从 EPS网络移动到 GSM/UMTS网络覆盖范围, 因为信号质量等原因, UE进行小区重选从 GSM/UMTS网 入并进行联合路 由区 /位置区更新过程, 在 RAU过程中 ISR激活, MSC VLR中的 Gs关联在 MSC VLR和 SGSN之间。 在该过程中 , 因为 SGSN、 MME和 UE都支持 ISR 功能, ISR激活, MME继续保存用户上下文等数据, SGSN在联合路由区更新 接受消息中携带 ISR激活信息给 UE , UE接收到该消息标识 UE在 EPS网络和 GSM/UMTS网络 PS域都是注册的。 当联合路由区 /位置区更新完成后, ISR激 活, UE在 GSM UMTS 网络 PS i或和 EPS 网络都已经注册, MSC/VLR中 Gs 关联关系中记录的是 SGSN信息。 图 2所示第三步: UE移回 EPS网络已经注册的跟踪区列表包含的跟踪区, 并且长时间在已经注册的跟踪区列表包含的跟踪区中接入, 也就是, 当 UE从 GSM/UMTS网络移回 EPS网络, 在图 2所示第一步已经注册的跟踪区列表包 含的跟踪区内, 并且长时间待在已经注册的跟踪区列表包含的跟踪区中, UE 不会发起联合 TAU/LAU过程 ,那么 MSC VLR中的 Gs关联一直保存的是 SGSN 信息。 当 UE待在 EPS 网络时, 因为是单无线接入, 所以不会在 GSM UMTS 网络进行 RAU过程, 包括周期性 RAU。 当 UE长时间驻留在 EPS网络时, 因为进行业务等原因, UE可能在 EPS 网络进入连接态, 而在 GSM/UMTS网络 UE肯定处于空闲态。 当 UE在 MME 中处于连接态时 , 如果是 MME接收到 CS寻呼 , 只会发起 EPS网络的寻呼 , 不会给 SGSN转发 CS寻呼来触发在 GSM UMTS网络的寻呼;而如果是 SGSN 接收到 CS寻呼,因为在 SGSN中 UE是处于空闲态, SGSN不知道 UE在 MME 中处于连接态 , SGSN会发起 GSM UMTS网络的 CS寻呼 , 而且会给 MME转 发 CS寻呼来触发在 EPS网络的寻呼。
这时, MME下的 CS寻呼是通过已经存在的信令连接将 CS寻呼消息发 送到 UE; SGSN下的 CS寻呼是在 UE可能在的所有区域进行寻呼并将 CS寻 呼消息发送到 UE , 也就是说需要在比较大的范围内进行寻呼, 而实际上在 GSM/UMTS网络中进行的 CS寻呼过程不可能寻呼到 UE, 所以 SGSN发起的 上述寻呼过程实际上是浪费无线资源。 在图 2 所示的场景下如果能够将 MSC VLR中的关联信息中记录的 SGSN信息更新为 MME信息 , 可以节约无 线网络资源 , 减轻无线网络以及 MME和 SGSN之间的信令负荷。 此外, 当 SGSN长时间不与 UE进行交互 , SGSN分离 ( detach ) UE时, SGSN会给 MSC VLR发送 CS域分离指示消息( IMSI Detach Indication )消息 , MSC/VLR接收到该消息会将 Gs关联删除。 这样在进行 CS业务终呼时, 即使 UE仍然在 EPS网^ ^入, 如果 MSC VLR和 MME之间没有关联关系信息, MSC/VLR就不会通知 MME在 EPS网络进行 CS寻呼,从而 UE在这种场景下 无法接收到呼叫、 短消息等 CS业务。 类似, 当 MSC VLR中 Gs关联关系保存的是 MME信息, UE长时间在 GSM/UMTS网络接入时, 也存在上述问题。 现有技术中上述问题的解决方法是, UE判断在 ISR激活并且在 EPS网络 进行接入和 CS注册, 在 GSM/UMTS进行 CS和 PS联合更新的情况下 , 在周 期性 TAU和 RAU定时器到时 , 进行 TAU或者 RAU更新时 , UE总是发起联 合更新, 而不是进行周期性更新。 现有技术中解决方案存在以下缺点: 对终端的实现有特定要求, 不利于终 端市场的开放, 一旦终端不支持上述实现方法的情况下, 终端所属的用户在图 2所示场景下就无法接收到呼叫、 短消息等 CS业务的寻呼。 所以需要一个网 络侧的解决方案来解决上述问题。 发明内容 考虑到现有技术中需要终端联合更新来解决解决 ISR 下关联关系可能不 存在和及时更新的问题而做出本发明 , 为此, 本发明的主要目的在于提供一种 更新关联关系的方法以及分组域网元, 以解决相关技术中的上述问题。 根据本发明的一个方面, 提供了一种更新关联关系的方法。
才艮据本发明实施例的更新关联关系的方法包括:分组域网元在获知需要更 新与移动交换中心 /拜访位置寄存器的关联关系后, 向移动交换中心 /拜访位置 寄存器发送位置更新请求,以使移动交换中心 /拜访位置寄存器才艮据位置更新请 求进行关联关系信息更新。 优选地, 上述分组域网元获知需要更新与移动交换中心 /拜访位置寄存器 的关联关系具体可以为: 分组域网元根据用户设备发送的周期性更新请求消息 获知需要更新与移动交换中心 /拜访位置寄存器的关联关系。 优选地, 上述分组域网元获知需要更新与移动交换中心 /拜访位置寄存器 的关联关系具体可以为: ISR激活所关联的一对分组域网元之间通过消息交互 获知需要更新与移动交换中心 /拜访位置寄存器的关联关系。 优选地, 上述 ISR激活所关联的一对分组域网元之间通过消息交互获知 需要更新与移动交换中心 /拜访位置寄存器的关联关系具体可以为:在一对分组 域网元的消息交互过程中, 没有与用户设备进行交互的时间超过预定时长的分 组域网元通知对端分组域网元需要进行关联关系更新; 对端分组域网元根据与 移动交换中心 /拜访位置寄存器是否存在关联关系, 决定是否向移动交换中心 / 拜访位置寄存器发送位置更新请求。 优选地 , 所述对端分组域网元才艮据与所述移动交换中心 /拜访位置寄存器 是否存在关联关系 ,决定是否向所述移动交换中心 /拜访位置寄存器发送所述位 置更新请求具体为: 上述对端分组域网元根据接收到的分离终端通知消息决定 向移动交换中心 /拜访位置寄存器发送位置更新请求。 优选地 , 所述对端分组域网元才艮据与所述移动交换中心 /拜访位置寄存器 是否存在关联关系 ,决定是否向所述移动交换中心 /拜访位置寄存器发送所述位 置更新请求具体为: 上述对端分组域网元根据接收到的用户设备状态查询消息 决定向移动交换中心 /拜访位置寄存器发送位置更新请求。 优选地 ,上述对端分组域网元根据接收到的更新关联关系通知消息来决定 向移动交换中心 /拜访位置寄存器发送位置更新请求。 优选地, ISR激活所关联的一对分组域网元之间通过消息交互获知需要更 新与移动交换中心 /拜访位置寄存器的关联关系具体可以为:在一对分组域网元 的消息交互过程中 , 没有与用户设备进行交互的时间超过预定时长的分组域网 元获知对端分组域网元是否存在与移动交换中心 /拜访位置寄存器的关联关系
信息, 并通知对端分组域网元进行关联关系更新; 接收到通知的对端分组域网 元, 向移动交换中心 /拜访位置寄存器发送位置更新请求。 优选地,在一对分组域网元的消息交互过程中, 没有与用户设备进行交互 的时间超过预定时长的分组域网元获知对端分组域网元是否存在与移动交换 中心 /拜访位置寄存器的关联关系信息,并通知对端分组域网元进行关联关系更 新具体为: 没有与用户设备进行交互的时间超过预定时长的分组域网元通过用 户设备的状态查询过程获知对端分组域网元是否存在与移动交换中心 /拜访位 置寄存器的关联关系信息, 并且通过更新关联关系消息进行通知。 优选地,在一对分组域网元的消息交互过程中, 没有与用户设备进行交互 的时间超过预定时长的分组域网元获知对端分组域网元是否存在与移动交换 中心 /拜访位置寄存器的关联关系信息 ,并通知对端分组域网元进行关联关系更 新具体为: 没有与用户设备进行交互的时间超过预定时长的分组域网元通过 ISR 激活过程获知对端分组域网元是否存在与移动交换中心 /拜访位置寄存器 的关联关系信息 , 并且通过更新关联关系消息或者通过在本网元分离用户设备 通知消息或终端状态查询消息中新增指示信息进行通知。 其中 , 上述分组域网元是移动性管理实体和 /或 GPRS月 务支持节点 , 其 中, 移动性管理实体和 GPRS服务支持节点是分离的网元、 合设的网元或功能 合一的网元。 优选地,移动性管理实体和 GPRS服务支持节点为合设的网元时, 一对分 组域网元之间以网元之间的消息或内部消息的方式进行消息交互。 优选地,移动性管理实体和 GPRS服务支持节点为功能合一的网元时,一 对分组域网元之间以内部消息的方式进行消息交互, 或以不需要消息而通过共 享数据的方式进行消息交互。 根据本发明的另一方面, 提供了一种分组域网元。 根据本发明实施例的分组域网元包括: 在获知需要更新与移动交换中心 / 拜访位置寄存器的关联关系后 ,向移动交换中心 /拜访位置寄存器发送位置更新 请求,以使移动交换中心 /拜访位置寄存器才艮据位置更新请求进行关联关系信息 更新。 其中 , 上述分组域网元是移动性管理实体和 /或 GPRS月 务支持节点。
通过上述技术方案, 能够及时更新关联关系, 满足在所有应用场景下 MSC/VLR总是能够正确进行 CS寻呼,减少无线网络资源浪费和减轻网络信令 负荷。 本发明的其它特征和优点将在随后的说明书中阐述, 并且,部分地从说明 书中变得显而易见, 或者通过实施本发明而了解。 本发明的目的和其他优点可 通过在所写的说明书、 权利要求书、 以及附图中所特别指出的结构来实现和获 得。 附图说明 此处所说明的附图用来提供对本发明的进一步理解, 构成本申请的一部 分, 与本发明的实施例一起用于解释本发明, 并不构成对本发明的不当限定。 在附图中: 图 1是现有技术中 GSM UMTS和 EPS网络中相关的网络***架构的示意 图; 图 2是现有技术中所要解决的问题的一种场景示意图; 图 3是根据本发明实施例的更新关联关系的方法的流程图; 图 4是根据本发明实例 1的信令流程图; 图 5是根据本发明实例 2的信令流程图; 图 6是根据本发明实例 3的信令流程图; 图 7是根据本发明实例 4的信令流程图; 图 8是根据本发明实例 5的信令流程图; 图 9是才艮据本发明实例 6的信令流程图。 具体实施方式 以下结合附图对本发明的优选实施例进行说明,应当理解, 此处所描述的 优选实施例仅用于说明和解释本发明, 并不用于限定本发明。
从上述描述中可以看出, 如果要 MSC VLR及时更新和保持关联关系, 在 图 2所示的场景下需要 MME向 MSC/VLR发送位置更新消息触发 MSC VLR 更新其中保存的关联信息。 本发明通过修改现有技术中 MME和 SGSN的处理流程,在获知需要更新 与 MSC VLR之间的关联关系时 , 由 MME或者 SGSN发起到 MSC VLR的更 新过程来更新关联关系, 而不是通过 UE在其周期性更新定时器到时总是发起 联合更新来实现。 方法实施例 才艮据本发明实施例,提供了一种更新关联关系的方法, 图 3示出了根据本 发明实施例的更新关联关系的方法的流程, 如图 3所示, 包括:
302 , PS域网元在获知需要更新与 MSC/VLR的关联关系后,向 MSC VLR 发送位置更新请求; 其中 , 上述 PS域网元是 MME和 /或 SGSN;
304 , MSC VLR才艮据位置更新请求进行关联关系信息更新。 通过上述处理, 可以实现在任何情况下, MSC VLR 总是能够正确进行 CS寻呼。
PS域网元获知需要更新与 MSC/VLR之间的关联关系的实现方式有很多 种, 下面结合附图对本发明所述的实施方法 ^故进一步详细说明。 实例 1 在该实例中, 上述 PS域网元获知需要更新与 MSC/VLR的关联关系的方 法具体为: PS 域网元根据 UE 发送的周期性更新请求消息获知需要更新与 MSC/VLR的关联关系。 图 4是 PS域网元根据 UE发送的周期性 TAU或者 RAU请求消息获知需 要向 MSC VLR发起位置更新的¾¾程示意图。 如图 4 所示, 该实施例应用到周期性 TAU 请求消息的¾¾程如图 4 中 A-401-402所示。 当 UE中周期性 TAU定时器到时, UE发起周期性 TAU过程。
UE向 MME发送周期性 TAU请求消息; MME接收到周期性 TAU请求消息, 判断如果当前 ISR激活并且 MME中存在到 MSC VLR的 SGs关联信息, 那么
MME向 MSC VLR发送位置更新请求消息, MSC VLR接收到 MME发送的位
置更新请求 , 更新其中保存的关联信息为 MME相关的信息。 如图 4 所示, 该实例应用到周期性 RAU 请求消息的流程如图 4 中 B-401-402所示。当 UE周期性 RAU定时器到时,UE向 SGSN发送周期性 RAU 消息; SGSN接收到周期性 RAU请求消息后, 判断当前 ISR激活并且 SGSN 中存在到 MSC VLR的 Gs关联信息, 那么 SGSN向 MSC VLR发送位置更新 请求消息, MSC VLR接收到 SGSN发送的位置更新请求, 更新其中保存的关 联信息为 SGSN相关的信息。 图 4所示实例在图 2所示的场景下实施时的处理如下,在图 2所示第二步 完成之后, MSC VLR中关联关系中保存的是 SGSN信息, MME和 SGSN中 保存有到该 MSC VLR的关联关系信息, 并且 MME和 SGSN中保存 ISR激活 标志信息。 在图 2所示第三步, UE中周期性 TAU更新定时器到时, UE向 MME发 送周期性 TAU请求消息 , MME接收到周期性 TAU请求消息后 , 判断 ISR激 活并且 MME中存在和 MSC/VLR的 SGs关联关系, MME向 MSC/VLR发送 位置更新请求, MSC VLR接收到位置更新请求, 更新其中保存的关联关系信 息为 MME相关信息。 后续, 当 MSC/VLR进行 CS寻呼时, MSC VLR将 CS寻呼发送到 MME, 当 UE在 MME中处于连接态, MME只需要发起 EPS网络的 CS寻呼, 通过存 在的信令连接将 CS寻呼发送到 UE; 当 UE在 MME中处于空闲态, MME发 起在 EPS网络的 CS寻呼并向 SGSN转发 CS寻呼来发起在 GSM UMTS网络 的 CS寻呼。 当 SGSN因为 UE长时间不与自己进行交互, 分离 (detach ) UE时, 给 MSC/VLR发送分离指示消息时 , MSC/VLR不会删除与 MME之间的 SGs关联 关系 , 这样后续 MSC/VLR根据其中关联关系中保存的 MME信息可以寻呼到 UE。 通过上述实例, PS域网元根据 UE发送的周期性更新请求消息发起和更 新了 MSC VLR中的关联关系 , 从而实现了在终呼时总是能够正确对 UE进行 寻呼。 除了根据 UE 发送的周期性更新请求消息获知需要更新关联关系的实施 方法外, 上述 PS域网元获知需要更新与 MSC VLR的关联关系的方法可以为:
ISR激活所关联的一对 PS域网元之间通过消息交互获知需要更新与 MSC VLR 的关联关系。
MME或者 SGSN在 ISR激活时, 因为与 UE之间长时间没有交互分离 UE时, 可以采用下面两种方法实现 ISR激活网元之间实现同步分离终端状态 信息。 一种是 MME 或者 SGSN 在分离 UE 之前, 询问 ISR 激活所关联的 SGSN/MME该 UE是否处于活动状态, 是否可以分离该 UE, 在本发明中将该 过程称为 UE状态查询过程。图 6是 PS网元根据 UE状态查询过程相关信息获 知需要更新与 MSC VLR之间的关联关系。另一种是不采用 UE状态查询过程, 而是由分离 UE的 MME或者 SGSN通知 ISR激活所关联的 SGSN/MME已经 分离 UE的方法。 在图 5中, PS网元根据通知消息获知需要更新与 MSC VLR 之间的关联关系。 实例 2 优选地, 上述 ISR激活所关联的一对 PS域网元之间通过消息交互获知需 要更新与 MSC VLR的关联关系的方法具体可以为: 在一对 PS域网元的消息 交互过程中, 没有与 UE进行交互的时间超过预定时长的 PS域网元通知对端 PS域网元需要进行关联关系更新; 对端 PS域网元才艮据与 MSC VLR是否存在 关联关系 , 决定是否向 MSC/VLR发送位置更新请求。 优选地, 对端 PS域网元才艮据与 MSC VLR是否存在关联关系 , 决定是否 向 MSC VLR发送位置更新请求具体为: 上述对端 PS域网元根据接收到的分 离终端通知消息决定向 MSC/VLR发送位置更新请求。 图 5是 PS域网元根据 ISR激活对端网元发送的本网元分离终端通知消息 获知需要向 MSC VLR发起位置更新的流程示意图。 在图 5 所示的流程中, MME/SGSN分离 UE 时, 向 ISR激活所关联的 SGSN/MME发送本网元分离终端通知消息 , SGSN/MME接收到该通知消息 , 保存相关信息, 判断如果存在 Gs/SGs关联关系, 发起到 MSC VLR的位置更 新。 图 5所示的流程包含:
A-501和 A-502是本实例应用到 MME发起分离终端操作 , SGSN接收到 通知消息, 获知需要发起到 MSC/VLR的位置更新流程;
A-501 , MME分离 UE , MME才艮据 ISR激活, 向 SGSN发送本网元分离 终端通知消息;
A-502 , SGSN接收到消息后, 获知 MME已经或者将要分离 UE, 可能需 要更新与 MSC VLR之间的关联关系 , SGSN给 MSC VLR发送位置更新消息 , MSC VLR接收到位置更新消息 , 更新关联关系中保存的信息为 SGSN相关信 息;
B-501和 B-502是本实施方式应用到 SGSN发起分离终端操作, MME接 收到通知消息 , 获知需要发起到 MSC VLR的位置更新流程;
B-501 , SGSN分离 UE , SGSN才艮据 ISR激活 , 向 MME发送本网元分离 终端通知消息;
B-502 , MME接收到消息, 获知 SGSN已经或者将要分离 UE, 可能需要 更新与 MSC VLR之间的关联关系, MME向 MSC VLR发送位置更新消息, MSC VLR接收到位置更新消息后, 更新关联关系中保存的信息为 MME相关 信息。 图 5所示实施方式应用于图 2所示场景下的流程如下, SGSN因为 UE与 其之间长时间没有交互, 分离 UE。 在分离 UE时, SGSN给 MME发送消息, 通知该 MME其已经或者正在分离 UE, MME接收到通知消息, 知道 ISR去激 活并且需要更新关联关系。 MME给 MSC VLR发送位置更新请求 , MSC/VLR 接收到位置更新请求消息 , 将其中关联关系中保存的信息更新为 MME相关信 息。 经过上述处理, 通过 PS域网元根据 ISR激活时, 对端网元发送的分离终 端通知消息获知需要向 MSC/VLR发送位置更新请求 , 实现了 MSC VLR中的 关联关系的及时更新。 实例 3 在该实例中, 对端 PS域网元根据与 MSC VLR是否存在关联关系, 决定 是否向 MSC/VLR发送位置更新请求具体为: 上述对端 PS域网元根据接收到 的 UE 犬态查询消息决定向 MSC VLR发送位置更新请求。 图 6示出了 PS域网元通过 UE状态查询消息获知需要向 MSC VLR发起 位置更新的流程。
在图 6所示的流程中 , MME/SGSN在分离 UE之前, 向 ISR激活所关联 的 SGSN/MME发送 UE状态查询消息 , SGSN/MME接^:到 UE状态查询消息 , 获知 ISR激活所关联的 MME/SGSN与 UE之间长时间没有交互, 判断如果存 在关联关系 , 向 MSC VLR发送位置更新请求来更新关联关系。 图 6所示的流程包含:
A-601和 A-602是本实例应用到 MME在定时器到, 判断与 UE之间长时 间没有交互 , 向 SGSN发送 UE状态查询消息 , SGSN接收到 UE状态查询消 息, 获知需要发起到 MSC VLR的位置更新流程;
A-601 , MME判断与 UE之间长时间没有交互, 决定是否需要分离 UE, 向 SGSN发送 UE 态查询消息;
A-602 , SGSN接收到 UE状态查询消息 , 获知 MME与 UE之间长时间没 有交互, 判断如果存在 Gs关联关系, 向相应 MSC VLR发送位置更新请求来 更新关联关系。 MSC VLR接收到位置更新消息后 , 更新关联关系中保存的信 息为 SGSN相关信息; B-601和 B-602是本实例应用到 SGSN在定时器到 , 判断与 UE之间长时 间没有交互,向 MME发送 UE ^犬态查询消息, MME接收到 UE ^犬态查询消息, 获 P需要发起到 MSC VLR的位置更新流程;
B-601 , SGSN判断与 UE之间长时间没有交互, 决定是否需要分离 UE, 向 MME发送 UE ^犬态查询消息; B-602 , MME接收到 UE状态查询消息, 获知 SGSN与 UE之间长时间没 有交互, 判断如果存在 SGs关联关系, 向相应 MSC VLR发送位置更新请求来 更新关联关系。 MSC VLR接收到位置更新消息 , 更新关联关系中保存的信息 为 MME 目关信息。 图 6所示实施方式应用于图 2所示的场景下的流程如下, SGSN 因为与 UE之间长时间没有交互, 在分离 UE之前, SGSN给 MME发送 UE状态查询 消息, MME接收到 UE状态查询消息, 获知 ISR激活所关联的 SGSN与 UE 之间长时间没有交互, 需要给 MSC/VLR发送位置更新消息来更新 MSC VLR 中保存的关联关系。 MME向 MSC VLR发送位置更新请求, MSC VLR接收到 位置更新请求消息, 将其中关联关系中保存的信息更新为 MME相关信息。
图 5和图 6是通过 ISR激活网元之间的通知和状态查询信息交互流程来 实施的。 通过上述处理, 实现了 MSC/VLR中关联关系的更新。 实例 4 在该实例中 , 上述对端 PS域网元根据接收到的更新关联关系通知消息来 决定向 MSC/VLR发送位置更新请求。 在以下图 7所示的实施方式中,不是通过 ISR相关的 UE状态查询或者本 网元删除 UE通知消息等交互流程, 而是通过新增的更新关联关系通知消息来 实施的。 MME或者 SGSN在给 MSC VLR发送分离 UE指示消息时, 向 ISR 激活所关联的 SGSN/MME发送更新关联关系通知消息 , 通知 SGSN/MME给 MSC VLR发送位置更新来更新 Gs/SGs关联; SGSN/MME接^:到通 消息 , 判断如果存在 Gs/SGs关联关系 , 发起到 MSC/VLR的更新过程。 图 7所示的流程包括:
A-701 和 A-702 是本实施方式应用到 MME 分离 UE 时, 在 MME 向 MSC/VLR发送分离 UE指示消息时 , MME向 ISR激活所关联的 SGSN发送更 新关联关系通知消息, SGSN 接收到更新关联通知消息, 获知需要发起到 MSC/VLR的位置更新:^程;
A-701 , MME分离 UE,在向 MSC VLR发送分离 UE指示消息时, 向 ISR 激活所关联 SGSN发送更新关联关系通知消息; A-702 , SGSN接收到更新关联关系通知消息 , 向相应 MSC VLR发送位 置更新请求消息来更新关联关系。 MSC VLR接收到位置更新消息, 更新关联 关系中保存的信息为 SGSN相关信息;
B-701 和 B-702 是本实施方式应用到 SGSN分离 UE 时, 在 SGSN 向 MSC/VLR发送分离 UE指示消息时, SGSN向 ISR激活所关联的 MME发送更 新关联关系通知消息, MME 接收到更新关联通知消息, 获知需要发起到 MSC/VLR的位置更新:^程;
B-701 , SGSN分离 UE,在向 MSC VLR发送分离 UE指示消息时,向 ISR 激活所关联的 MME发送更新关联关系通知消息;
步骤 B-702, MME接^:到更新关联关系通 p消息, 向相应 MSC VLR发 送位置更新请求消息来更新关联关系, MSC/VLR接收到位置更新消息, 更新 关联关系中保存的信息为 MME相关信息。 图 7所示实施方式应用于图 2所示的场景下的流程如下, SGSN 因为与 UE之间长时间没有交互, 在分离 UE过程中, SGSN给 MSC VLR发送分离 UE指示信息时 , SGSN给 MME发送更新关联关系通知消息 , MME接收到通 知消息给 MSC VLR发送位置更新请求, MSC VLR接收到位置更新请求消息 , 将其中关联关系中保存的信息更新为 MME。 图 5、 图 6和图 7所示的 3种实施方式均为要分离 UE的 PS i或网元并不 知道 ISR激活所关联的 PS网元是否存在 SGs/Gs关联的情况,由 ISR激活所关 联的 PS网元接收到相关消息判断自己是否存在 SGs/Gs关联关系 ,是否需要更 新关联关系, 从而发起更新的流程。 通过上述处理,在要分离 UE的 PS域网元并不知道 ISR激活所关联的 PS 网元是否存在 SGs/Gs关联的情况下, 实现了 MSC VLR中关联关系信息的更 新。 实例 5 在该实例中, ISR激活所关联的一对 PS域网元之间通过消息交互获知需 要更新与 MSC VLR的关联关系具体为: 在一对 PS域网元的消息交互过程中, 存在与 MSC/VLR的关联关系信息, 并通知所述对端分组域网元进行关联关系 更新; 接收到通知的对端 PS域网元, 向 MSC VLR发送位置更新请求。 优选地, 在一对 PS域网元的消息交互过程中, 没有与 UE进行交互的时 间超过预定时长的 PS域网元获知对端 PS域网元是否存在与 MSC/VLR的关联 关系信息, 并通知所述对端分组域网元进行关联关系更新具体为: 没有与 UE 进行交互的时间超过预定时长的 PS域网元通过 UE的状态查询过程获知所述 对端分组域网元是否存在与 MSC/VLR的关联关系信息, 并且通过更新关联关 系消息进行通知。 以下图 8和图 9所示两种实施方式中,分离 UE的 PS i或网元已经获知 ISR 激活所关联的 PS网元存在 SGs/Gs关联,发送更新关联关系消息通知 ISR激活 所关联的 PS网元进行关联关系更新。图 8所示流程是 PS网元通过状态查询过
程获知 ISR激活所关联的 PS网元是否存在 SGs/Gs关联。 在图 8所示的实施方式中 , MME/SGSN在分离 UE之前, 向 ISR激活所 关联的 SGSN/MME发送 UE状态查询消息; SGSN/MME接收到查询消息 , 在 响应消息中新增携带自己是否与 MSC VLR之间存在 Gs/SGs关联关系信息。 该信息可以通过新增一个信息字段或者对现有字段进行扩充等方式实现;
MME/SGSN接收到该信息 ,在分离 UE时 ,如果 ISR激活所关联的 SGSN/MME 存在 Gs/SGs关联, 则给 ISR关联的 SGSN/MME发送更新关联关系消息,通知 该 SGSN/MME发起到 MSC VLR的位置更新过程。 如果不存在 Gs/SGs关联, 则不给 ISR激活所关联的 SGSN/MME发消息; SGSN/MME接收到更新 Gs/SGs 关联关系消息 , 发起到 MSC/VLR的位置更新过程。 图 8所示的流程包含:
A-801 -804是本实施方式应用到 MME定时器到的场景下的处理流程;
A-801 , MME判断与 UE之间长时间没有交互, 决定是否需要分离 UE , 向 SGSN发送 UE ^!犬态查询请求消息; A-802 , SGSN接收到 UE ^犬态查询消息, 向 MME返回查询响应消息, 在该消息中新增携带自己是否与 MSC VLR之间存在 Gs关联关系信息;
A-803 , MME接收到响应消息, 在决定分离 UE时, 向 MSC VLR发送分 离 UE指示消息时, 判断 ISR激活所关联的 SGSN是否存在 Gs关联, 如果存 在关联关系 , MME向 ISR激活所关联 SGSN发送更新关联关系通知消息 , 否 则不用发送更新关联关系通知消息;
A-804 , 如果 SGSN接收到更新关联关系通知消息 , 则向相应 MSC VLR 发送位置更新请求来更新关联关系。 MSC VLR接收到位置更新消息, 更新关 联关系中保存的信息为 SGSN相关信息;
B-801 -804是本实例应用到 SGSN定时器到的场景下的处理流程; B-801 , SGSN判断与 UE之间长时间没有交互, 决定是否需要分离 UE , 向 MME发送 UE ^!犬态查询请求消息;
B-802 , MME接收到 UE ^犬态查询消息, 向 SGSN返回查询响应消息, 在该消息中新增携带自己是否与 MSC VLR之间存在 SGs关联关系信息;
B-803 , SGSN接收到响应消息信息, 在决定分离 UE 时, 向 MSC VLR 发送分离 UE指示消息时, 判断 ISR激活所关联的 MME、 是否存在 SGs关联, 如果存在关联关系 , SGSN向 ISR激活所关联 MME发送更新关联关系通知消 息 , 否则不用发送更新关联关系通知消息; B-804 , 如果 MME接收到更新关联关系通知消息, 则向相应 MSC VLR 发送位置更新请求来更新关联关系。 MSC VLR接收到位置更新消息, 更新关 联关系中保存的信息为 MME相关信息。 图 8所示实施方式应用于图 2所示的场景下的流程如下, SGSN 因为与 UE之间长时间没有交互, 在分离 UE之前, SGSN给 MME发送 UE状态查询 消息 , MME接^:到查询消息 , 在查询响应消息中携带自己与 MSC/VLR之间 存在 SGs关联信息, SGSN接收到查询响应消息, 在分离 UE时, 向 MME发 送更新关联关系消息通知 MME发起到 MSC VLR的位置更新, MME接收到 通知消息给 MSC VLR发送位置更新请求 , MSC VLR接收到位置更新请求消 息, 将其中关联关系中保存的信息更新为 MME相关信息。 实例 6 优选地, 在一对 PS域网元的消息交互过程中, 没有与 UE进行交互的时 间超过预定时长的 PS域网元获知对端 PS域网元是否存在与 MSC/VLR的关联 关系信息 , 并通知所述对端分组域网元进行关联关系更新具体为: 没有与用户 所述对端分组域网元是否存在与 MSC VLR的关联关系信息, 并且通过新增的 更新关联关系消息 , 或者通过在本网元分离 UE通知消息中新增指示信息 , 或 者通过在终端状态查询消息中新增指示信息等方式通知 ISR激活对端网元需要 更新关联关系 , 对端网元由此获知需要更新关联关系。 在图 9中, PS网元通过 ISR激活过程获知 ISR激活所关联的 PS网元是 否存在 SGs/Gs关联。 图 9所示的实例中 , MME和 SGSN在 ISR激活过程中传递和获取 SGs/Gs 关联信息, 在 PS 网元分离 UE 时, 通知 ISR 激活所关联的 PS 网元发起到 MSC/VLR的位置更新流程。 图 9所示流程包含:
901 , UE给 MME/SGSN发送 TAU/RAU更新请求消息 , 消息中包含终端 的 ISR能力;
902 ,在更新过程中 MME/SGSN作为上下文请求方向 SGSN/MME发送上 下文请求;
903 , SGSN/MME作为上下文请求响应方向 MME/SGSN发送上下文响应, 其中携带自己的 ISR能力, 以及是否已经建立关联关系信息。 是否已经建立关 联关系信息可以通过新增一个信息字段或者对现有字段进行扩充等方式实现;
904 , 上下文请求方 MME/SGSN接收到上下文响应消息 , 判断是否需要 激活 ISR。 如果满足 ISR激活条件, 则激活 ISR并保存是否已经建立 Gs/SGs 关联关系信息, 否则不激活 ISR。 在上下文应答消息中 MME/SGSN通过 ISR 激活标志通知上下文请求响应方 SGSN/MME当前 ISR是否激活 , 通过是否已 经建立关联关系信息通知 SGSN/MME 自己是否建立 SGs/Gs 关联信息, SGSN/MME 接收到该消息, 保存 ISR 激活所关联的 MME/SGSN 是否建立 SGs/Gs关联信息;
905 , MME/SGSN给 UE发送更新接受消息,其中携带 ISR激活标志信息。 UE接收到更新接收信息, 根据其中的标志信息获知 ISR是否激活; 906 , 在分离 UE时, MME/SGSN才艮据自己在 ISR激活过程中获知的 ISR 激活所关联的 SGSN/MME 是否有 Gs/SGs 关联信息, 决定是否通知该 SGSN/MME发起到 MSC/VLR的更新过程。 在需要发送通知消息的情况下, MME/SGSN给 ISR相关联的 SGSN/MME发送通知消息; 通知消息可以有多种实施方式, 例如,通过新增的更新关联关系通知消息 的方式, 通知和更新关联关系的流程如图 7所示; 通过在 UE状态查询消息中 新增指示信息方式, 通知和更新关联关系的流程和图 6类似; 或者通过在本网 元分离 UE通知消息中新增指示信息方式, 通知和更新关联关系的流程和图 5 类似。
907 , SGSN/MME接收到通知消息, 给 MSC VLR发送位置更新请求, MSC VLR 接收到位置更新请求消息, 将其中关联关系中保存的信息更新为 SGSN/MME的信息。 其中, 在 901中, UE也可以不在更新请求消息中携带自己的 ISR能力信 息 ,而是规定或者默认所有能够接入 EPS和 GSM UMTS网络的 UE都具有 ISR 匕刀
图 9 所示实施方式采用新增的更新关联关系通知消息实施时应用于图 2 所示场景下的流程如下, 在图 2所示第二步 ISR激活过程中 , SGSN给 MME 发送上下文请求消息 , MME在发送给 SGSN的上下文响应消息中携带自己与 MSC VLR之间已经建立 SGs关联信息, SGSN接收到上下文响应消息, 保存 MME已经建立 SGs关联信息。 激活 ISR, SGSN在发送给 MME的上下文应答 消息中携带 ISR激活标志, 并且携带自己与 MSC/VLR之间已经建立 Gs关联 信息, MME接收到上下文应答消息, 保存 SGSN已经建立 Gs关联信息。 在图 2所示第三步, 当 UE长时间驻留在 EPS网络, SGSN要分离 UE时, 在给 MSC VLR发送分离指示信息消息时, SGSN判断自己处于 ISR激活状态, 并且与自己进行 ISR关联的 MME存在 SGs关联关系 , SGSN给 MME发送更 新关联关系通知消息, 通知 MME发起到 MSC VLR的位置更新过程。 MME 接收到更新关联关系通知消息 , 发起到 MSC VLR的位置更新过程 , MSC VLR 更新关联关系中保存的信息为 MME相关信息。 本发明实施例所述的方法应用到 MSC VLR中关联关系保存的是 MME信 息, UE长时间在 GSM/UMTS网络接入场景下的流程与图 2类似, 在此不再赘 述。 需要说明的是, 在本发明实施例中 , 描述了在 MME向 MSC VLR发送分 离 UE指示消息时, MME向 ISR激活所关联的 SGSN发送更新关联关系通知 消息的流程 , 在实际应用中, 可以是在 MME向 MSC/VLR发送分离 UE指示 消息之前、 同时或者之后进行以上动作, 其应用原理相同, jtb处不再赞述。 本发明所示技术方案需要 MME和 SGSN增加一些处理逻辑, 但是相对 UE在周期性更新时总是发起联合更新过程的解决方案减小了对 UE 的处理要 求和依赖, 并且和 UE周期性定时器到发起联合更新的解决方案可以并存。 特 别是在大容量 MME和 SGSN的情况下, 通过筒单 4爹改 MME和 SGSN—对网 元的处理, 可以减少对接入这一对网元的大量 UE的处理要求和依赖。 装置实施例 根据本发明的实施例, 提供了一种分组域网元。 该分组域网元用于在获知需要更新与移动交换中心 /拜访位置寄存器的关 联关系后, 向移动交换中心 /拜访位置寄存器发送位置更新请求, 以使移动交换 中心 /拜访位置寄存器根据位置更新请求进行关联关系信息更新。
其中, 上述分组域网元是移动性管理实体和 /或 GPRS月 务支持节点。 本发明实施例提供的方法、 ***不仅适用于附图和上述描述中所示 MME 和 SGSG是分离的网元的场景, 还适用于 MME和 SGSN是合设的网元的各种 场景, 此时 MME和 SGSN之间的交互消息可以以网元之间的消息或者内部消 息方式实施; 另外, 还适用于 MME和 SGSN是功能合一的网元的场景, 此时 MME和 SGSN之间的交互消息可以以内部消息方式实施或者不需要消息而通 过共享的数据等方式实现。 在上述场景下, 上述分组域网元就是 MME/SGSN 合设的网元或者功能合一的网元。 综上所述, 借助于本发明的技术方案, 能够及时更新关联关系, 满足在所 有应用场景下 MSC VLR总是能够正确进行 CS寻呼, 减少无线网络资源浪费 和减轻网络信令负荷。 以上所述仅为本发明的优选实施例而已, 并不用于限制本发明,对于本领 域的技术人员来说, 本发明可以有各种更改和变化。 凡在本发明的精神和原则 之内, 所作的任何修改、 等同替换、 ?丈进等, 均应包含在本发明的保护范围之 内。
Claims
1. 一种更新关联关系的方法, 其特征在于, 所述方法包括:
分组域网元在获知需要更新与移动交换中心 /拜访位置寄存器的关 联关系后, 向所述移动交换中心 /拜访位置寄存器发送位置更新请求, 以 使所述移动交换中心 /拜访位置寄存器才艮据所述位置更新请求进行关联 关系信息更新。
2. 根据权利要求 1所述的方法, 其特征在于, 所述分组域网元获知需要更 新与移动交换中心 /拜访位置寄存器的关联关系具体为: 所述分组域网元才艮据用户设备发送的周期性更新请求消息获知需 要更新与移动交换中心 /拜访位置寄存器的关联关系。
3. 根据权利要求 1所述的方法, 其特征在于, 所述分组域网元获知需要更 新与移动交换中心 /拜访位置寄存器的关联关系具体为:
ISR激活所关联的一对分组域网元之间通过消息交互获知需要更新 与移动交换中心 /拜访位置寄存器的关联关系。
4. 根据权利要求 3所述的方法, 其特征在于, 所述 ISR激活所关联的一对 分组域网元之间通过消息交互获知需要更新与移动交换中心 /拜访位置 寄存器的关联关系具体为:
在所述一对分组域网元的消息交互过程中,没有与用户设备进行交 互的时间超过预定时长的分组域网元通知对端分组域网元需要进行关联 关系更新;
所述对端分组域网元才艮据与所述移动交换中心 /拜访位置寄存器是 否存在关联关系 , 决定是否向所述移动交换中心 /拜访位置寄存器发送所 述位置更新请求。
5. 根据权利要求 4所述的方法, 其特征在于, 所述对端分组域网元根据与 所述移动交换中心 /拜访位置寄存器是否存在关联关系 , 决定是否向所述 移动交换中心 /拜访位置寄存器发送所述位置更新请求具体为:
所述对端分组域网元根据接收到的分离终端通知消息决定向所述 移动交换中心 /拜访位置寄存器发送所述位置更新请求。
6. 根据权利要求 4所述的方法, 其特征在于, 所述对端分组域网元根据与 所述移动交换中心 /拜访位置寄存器是否存在关联关系 , 决定是否向所述 移动交换中心 /拜访位置寄存器发送所述位置更新请求具体为:
所述对端分组域网元根据接收到的用户设备状态查询消息决定向 所述移动交换中心 /拜访位置寄存器发送所述位置更新请求。
7. 才艮据权利要求 4所述的方法, 其特征在于,
所述对端分组域网元根据接收到的更新关联关系通知消息来决定 向所述移动交换中心 /拜访位置寄存器发送所述位置更新请求。
8. 根据权利要求 3所述的方法, 其特征在于, ISR激活所关联的一对分组 域网元之间通过消息交互获知需要更新与移动交换中心 /拜访位置寄存 器的关联关系具体为:
在所述一对分组域网元的消息交互过程中,没有与用户设备进行交 互的时间超过预定时长的分组域网元获知对端分组域网元是否存在与所 述移动交换中心 /拜访位置寄存器的关联关系信息 , 并通知所述对端分组 域网元进行关联关系更新;
接收到通知的所述对端分组域网元, 向所述移动交换中心 /拜访位 置寄存器发送所述位置更新请求。
9. 根据权利要求 8所述的方法, 其特征在于, 在所述一对分组域网元的消 息交互过程中 , 没有与用户设备进行交互的时间超过预定时长的分组域 网元获知对端分组域网元是否存在与所述移动交换中心 /拜访位置寄存 器的关联关系信息 , 并通知所述对端分组域网元进行关联关系更新具体 为:
没有与用户设备进行交互的时间超过预定时长的所述分组域网元 通过用户设备的状态查询过程获知所述对端分组域网元是否存在与所述 移动交换中心 /拜访位置寄存器的关联关系信息 , 并且通过更新关联关系 消息进行通知。
10. 根据权利要求 8所述的方法, 其特征在于, 在所述一对分组域网元的消 息交互过程中 , 没有与用户设备进行交互的时间超过预定时长的分组域 网元获知对端分组域网元是否存在与所述移动交换中心 /拜访位置寄存
器的关联关系信息 , 并通知所述对端分组域网元进行关联关系更新具体 为:
没有与用户设备进行交互的时间超过预定时长的所述分组域网元 通过 ISR激活过程获知所述对端分组域网元是否存在与所述移动交换中 心 /拜访位置寄存器的关联关系信息 , 并且通过更新关联关系消息或者通 过在本网元分离用户设备通知消息或终端状态查询消息中新增指示信息 进行通知。
11. 根据权利要求 1至 10任一项所述的方法, 其特征在于, 所述分组域网元 是移动性管理实体和 /或 GPRS服务支持节点, 其中, 移动性管理实体和 GPRS服务支持节点是分离的网元、 合设的网元或者功能合一的网元。
12. 才艮据权利要求 11所述的方法, 其特征在于, 所述移动性管理实体和所述 GPRS 服务支持节点是合设的网元 , 所述一对分组域网元之间以网元之 间的消息或内部消息的方式进行消息交互。
13. 才艮据权利要求 11所述的方法, 其特征在于, 所述移动性管理实体和所述 GPRS 服务支持节点是功能合一的网元, 所述一对分组域网元之间以内 部消息或不需要消息而通过共享数据的方式进行消息交互。
14. 一种分组 i或网元, 其特征在于, 用于:
在获知需要更新与移动交换中心 /拜访位置寄存器的关联关系后 , 向所述移动交换中心 /拜访位置寄存器发送位置更新请求, 以使所述移动 交换中心 /拜访位置寄存器才艮据所述位置更新请求进行关联关系信息更 新。
15. 才艮据权利要求 14所述的分组域网元, 其特征在于, 所述分组域网元是移 动性管理实体和 /或 GPRS月 务支持节点。
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