WO2011069462A1

WO2011069462A1 - Method, system and user equipment for controlling activation of idle mode signaling reduction

Info

Publication number: WO2011069462A1
Application number: PCT/CN2010/079629
Authority: WO
Inventors: 胡英; 宗在峰; 朱进国; 朱春晖; 楚俊生; 王志海
Original assignee: 中兴通讯股份有限公司
Priority date: 2009-12-11
Filing date: 2010-12-09
Publication date: 2011-06-16
Also published as: CN102098655B; CN102098655A

Abstract

A method, a system and User Equipment (UE) for controlling the activation of the Idle mode Signaling Reduction (ISR) are provided, and the method includes: the UE executes the joint Tracking Area Update (TAU) and Location Area Update (LAU); in the case of satisfying predetermined conditions, the ISR is activated or kept unactivated, wherein the predetermined conditions include that the result of the joint TAU and LAU is that only the joint TAU and LAU of the short message service over SGs is successful, and that the UE is needed to support predetermined services, wherein the predetermined services include other Circuit Switching (CS) services except the short message service. Using the present solution, it is ensured that the UE can be called when the CS services are being executed, such as voice calls, etc.

Description

The present invention relates to the field of communications, and in particular to an Idle mode signaling reduction (ISR) activation control method and system in an idle mode. And User Equipment (UE). BACKGROUND The Standardization Working Group of the 3rd Generation Partnership Project is currently working on the Packet Switched Core (PS Core) and the Universal Mobile Telecommunication System Radio Access Network (referred to as the Universal Mobile Telecommunication System Radio Access Network). For the evolution of UTRAN, the evolved mobile communication system is called Evolved Packet System (EPS). Figure 1 is a related system of Global System for Mobile communications (GSM). A schematic diagram of a network architecture of a Universal Mobile Telecommunications System (UMTS) and an EPS network, as shown in FIG. 1, includes: UE 101, an evolved global mobile communication system radio access network (E-UTRAN) 102. Mobility Management Entity (MME) 103, GSM EDGE Radio Access Network (GSM EDGE Radio Access Network, GERAN for short) / UTRAN 104, General Packet Radio Service (referred to as General Packet Radio Service) GPRS) Month Support Node (Serving GPRS) Support Node (referred to as SGSN) 105, Mobile Switching Center (MSC) / Visitor Location Register (VLR) 106, Serving Gateway (S-GW) And a Packet Data Network Gateway (referred to as PDN GW or P-GW) 107, Home Subscriber Server (HSS) / Home Location Register (HLR) 108. In the GSM/UMTS network, the UE may separately perform Circuit Switching (CS) and Packet Switching (PS) attachment/update. At this time, the UE sends a location area update to the GERAN/UTRAN. (Location Area Update, LAU for short) and Routing Area Update (RAU) request message, the MSC/VLR receives the LAU request message through GERAN/UTRAN, and performs the attach/update process of the CS domain. The SGSN receives the RAU request message through the GERAN/UTRAN, and performs the attach/update process of the PS domain. The manner in which the UE is attached/updated in the CS domain and the PS domain separately needs to perform signaling exchange and occupy radio resources respectively. To this end, a Gs interface is introduced between the MSC/VLR and the SGSN. When the network works in mode I, the UE updates through the joint RAU/LAU process, and the Gs association is established between the MSC/VLR and the SGSN. When the MSC/VLR is called a voice call, a Short Message Service (SMS), etc. When the service needs to page the UE, the MSC/VLR performs paging through the SGSN; when the network works in mode Π/ΠΙ, the UE performs the RAU and LAU processes respectively, and the MSC/VLR needs to find the CS service due to voice calls, short messages, and the like. When the UE is called, the MSC/VLR performs paging through the A/IU-CS interface according to the current location information of the UE stored therein. When the MSC/VLR receives the location area update request message from the A/IU-CS interface, the Gs association information will be deleted. At the same time, there is only one Gs association or A/IU-CS interface activation in the same UE in the MSC/VLR.

The EPS network has only the PS domain. One implementation method for the UE to access the voice service in the E-UTRAN is IMS over IP. This method requires the deployment of the Internet Protocol (IP) multimedia subsystem (IP Multimedia Core Network Subsystem). , IMS for short; another implementation is CS Fallback in EPS (CSFB), which does not need to deploy the IMS system, but implements the SGs interface between the MME and the MSC/VLR. . An implementation manner of the UE accessing the short message service in the E-UTRAN is to transmit a short message (SMS over IP) through IP. In this mode, an IMS network element such as an IP-SM-GW needs to be deployed; another implementation manner is through an SGs. The delivery of short messages (SMS over SGs) is achieved by introducing an SGs interface between the MME and the MSC/VLR.

The CSFB is implemented by: when the UE accesses the E-UTRAN network, performing joint attach or joint tracking area update (TAU) and LAU, and establishing SGs between the MME and the MSC/VLR. Association (ie, saving the MSC/VLR number or address information in the MME, and storing the MME number or address information in the MSC/VLR;). Subsequently, when receiving the call, the MSC/VLR needs to page the UE, and sends a paging message to the MME according to the SGs association information according to the SGs interface. After receiving the paging message, the MME sends the CS service page to the E-UTRAN. UE. After the UE is paged, a corresponding fallback procedure is performed, and the UE accesses from the GERAN/UTRAN network and performs a call setup process with the MSC/VLR to perform a call. When the user initiates a call, the UE also drops back from the E-UTRAN to the GERAN/UTRAN access through the corresponding fallback procedure. The implementation method of the CS service such as Call Independent Supplementary Services (SS) and Location Services (LCS) is similar to the implementation method of the call service. The implementation of the SMS over SGs is similar to that of the CSFB. The difference is that when the MME receives the paging message of the short message service sent by the MSC/VLR, if the UE is in the idle state in the MME, the MME performs paging of the PS through the E-UTRAN, and the UE After being paged, there is no need to fall back to the GERAN/UTRAN access, but reside in the E-UTRAN, and the short message content and the transmission status report message are transmitted between the MME and the MSC/VLR through the SGs interface, between the UE and the MME. The short message content is transmitted by signaling and the status message is sent. If the MME receives the paging of the short message service from the MSC/VLR, the UE is in the connected state in the MME, and there is already a signaling connection between the UE and the MME, except that the MME does not need to page the UE, other processes and the foregoing The process of the idle state is the same. The SMS over SGs requires that the short message content and the transmission status 4 advertisement message can be transmitted between the MME and the MSC/VLR. When the SGs interface is introduced, the related art specifies that at the same time, the user has only one SGs association or one Gs association or A/IU-CS interface activation in the MSC/VLR. When E-UTRAN is deployed, there is a region i of GERAN/UTRAN and E-UTRAN overlapping coverage. In order to reduce the UE's network selection between GERAN/UTRAN and E-UTRAN and initiate the registration process, the third generation partner program The standardization working group defines the ISR. The main idea is that the UE is registered in both the SGSN and the MME. The SGSN and the MME both store the user context information. The UE also stores the registration information of the two networks, so that the UE needs to be in the two networks. The TAU and RAU procedures are no longer performed when the selection is made, unless the routing area where the UE is currently located is not registered or the current tracking area is not in the list of already registered tracking areas. If the ISR is not activated, the TAU or RAU is always initiated each time the UE changes the access system. In the case of ISR activation, the UE does not initiate an update when the UE changes the access system. Therefore, when the UE is in the idle state, the network cannot know which access system the UE is currently in. The SGSN and the MME need to simultaneously page the UE. 2 is a schematic diagram of an interaction process when the ISR activation, the SGs activation, the UE is in an idle state in the MME, and the MME receives a CS service from the MSC/VLR according to the related art, as shown in FIG. The interaction process includes:

202. The MSC/VLR initiates paging of the CS service to the MME through the SGs interface.

204. The MME initiates a paging request to the UE by using one or more eNodeBs according to the location information of the UE stored therein and the location information in the paging message.

206. Since the ISR is activated and the UE is in an idle state in the MME, the UE may actually access in the GERAN/UTRAN, and the MME forwards the information to the SGSN according to the information of the SGSN saved therein. A paging message for the CS service received from the MSC/VLR.

208. The SGSN initiates paging of the CS service to the UE by using the GERAN/UTRAN in the UE according to the location information of the UE and the location information in the paging message. Through the above process, the MSC/VLR pages to the UE, thereby enabling CS services such as calls and short messages. In the deployment and application of the EPS network, there is a network deployment scenario as shown in Figure 3. In this scenario, no IMS is deployed. The MSC/VLR 1 is a traditional GSM/UMTS MSC that supports all CS services such as calls and short messages. SMS over SGs are not supported; MSC/VLR 2 only supports SMS over SGs, and does not support CSFB and traditional MSC functions, such as voice call control. The problem scenario 1 is described in detail below with reference to FIG. 3, assuming that the usage and voice settings in the UE are currently set to voice centric, and the UE supports SMS over SGs, possibly supporting CSFB. In the network deployment scenario shown in Figure 3, the MSC/VLR cannot page to the UE when the call is made, and the call service cannot be implemented. In the first step, the user turns on or inserts a user card, etc., and the UE attaches to the GERAN/UTRAN. The UE performs joint attach or separate LAU and RAU according to the current network mode and the terminal type, and the UE performs CS registration in the MSC/VLR 1. The MSC/VLR 1 performs location update and acquisition of user subscription data to the HSS/HLR. The MSC information currently stored by the UE recorded in the information of the UE in the HSS/HLR is information of the MSC/VLR 1. If it is a joint attachment, a Gs association is established between the MSC/VLR 1 and the SGSN, and the MSC/VLR 1 receives the voice call, and can be paged to the UE through the Gs interface. If the LAU and the RAU are respectively performed, the MSC/VLR 1 saves the current location information of the user and the A/IU-CS interface is activated, and the MSC/VLR 1 receives the voice call, and passes the A/IU according to the current location information of the UE stored therein. The -CS interface can page to the UE. In the second step, the UE accesses from the E-UTRAN due to changes in the wireless signal strength or user movement. When the UE accesses the joint TAU/LAU from the E-UTRAN, the MME registers successfully, and the MME selects the MSC/VLR 2 for the UE to register with the UE, and establishes an SGs association between the MME and the MSC/VLR 2. In the TAU/LAU process, the ISR is activated, and the MME indicates the ISR activation in the joint TAU/LAU response message, and the UE sets the ISR corresponding flag after receiving the response message. The MSC/VLR 2 performs location update and acquisition of user subscription data to the HSS/HLR. The MSC information currently recorded by the UE recorded in the information of the UE in the HSS/HLR is changed from the information of the MSC/VLR 1 to the information of the MSC/VLR 2, and the HSS/HLR sends a cancel location message to the MSC/VLR 1. The MSC/VLR 1 identifies that the data of the UE is invalid or deletes the data of the UE. Because MSC/VLR 2 does not support CSFB, only SMS over SGs are supported. Therefore, in the joint update response message, the MME will indicate that the UE is only registered with SMS over SGs. The UE will set the voice priority according to its own usage and voice settings. Data centric determines the subsequent operations. If voice priority is currently set, the UE will reselect from E-UTRAN to GERAN/UTRAN access. In the third step, the UE reselects to GERAN/UTRAN access. At this time, if the UE accesses from the already registered GERAN/UTRAN network area, the RA/LA does not change. Because the ISR has been activated, the UE does not initiate a joint RAU/LAU or LAU, then the information of the UE in the HSS/HLR is The recorded MSC information currently stored by the UE is still the information of the MSC/VLR 2, not the information of the MSC/VLR 1 that the UE should register under GEARN/UTRAN. When the UE resides in the already registered RA/LA area, if the user to which the UE belongs is called as the called user, during the call routing process, the HSS/HLR will return the information of the MSC/VLR 2, and the call will be routed incorrectly to MSC/VLR 2, which cannot be routed to MSC/VLR 1, causes the call to fail to reach the UE. In problem scenario 1, there is another possible situation that will also result in a call (Mobile

Terminating Call, referred to as MT call), is inaccessible to the user. The UE first attaches in GERAN/UTRAN, then performs joint TAU/LAU in E-UTRAN, and sets the data priority in the UE when the joint TAU/LAU is set, then the joint update succeeds, ISR activates, MSC/VLR 2 and MME Establish an SGs association between them. Subsequently, when the UE uses the E-UTRAN access and the voice setting is changed from data priority to voice priority, the UE initiates a joint update procedure and then reselects to the GERAN/UTRAN access according to the result of the joint update. If the RA/LA that the UE accesses in GERAN/UTRAN has already been registered, the UE will not initiate a joint RAU/LAU or LAU procedure. In the UE operation flow, there is also a problem that the user is inaccessible when the UE is subsequently camped on the already registered RA/LA area. The network deployment scenario of scenario 1 above is that MSC/VLR 2 does not support CSFB. There is another network deployment scenario (called problem scenario 2). The MSC/VLR supports CSFB, but the MME does not support CSFB. In the call routing process, the call can be routed to the MSC/VLR, and the MSC/VLR sends the MSC/VLR to the MME through the SGs interface. Since the MME determines that the UE is the joint registration of the SMS over SGs only, it rejects the CS service such as the voice call sent by the MSC/VLR. Paging, which may result in the same result as Problem Scenario 1, ie, the user is inaccessible when the UE subsequently moves back to the RA/LA network area that the GERAN/UTRAN has registered for voice calls. In the above problem scenario, not only the voice call service, but other CS services other than the short message, for example, the call-independent supplementary service, the LCS service, and the like may also have problems in that the user cannot reach the service when the network initiates the service. Only after the short message service is routed to the MSC/VLR 2, the UE can be paged through the flow shown in FIG. 2. SUMMARY OF THE INVENTION An object of the present invention is to provide a signaling saving activation control method, system, and UE in an idle mode, to solve a problem that a user may be inaccessible to other CS services except short message services due to ISR activation. An aspect of the present invention provides a signaling saving activation control method in an idle mode, including: a user equipment UE performs a joint tracking area update TAU and a location area update LAU; deactivating an ISR or maintaining an ISR if a predetermined condition is met Inactive, wherein the predetermined condition includes: the result of the joint TAU and the LAU is that the joint TAU and the LAU of the SMS over SGs are successful, and the UE needs to support the predetermined service, and the predetermined service includes: other circuit switched CS services except the short message service . Preferably, the UE needs to support the predetermined service, including: the UE needs to support the predetermined service when accessing the GERAN and/or the UTRAN. Preferably, before the deactivating the ISR or keeping the ISR inactive, the method further includes: the predetermined network element determining that the UE needs to support the predetermined service, where the predetermined network element includes at least one of the following: a UE, an MME. Preferably, in a case that the predetermined network element includes the UE, the predetermined network element determines that the UE needs to support the predetermined service, and the UE determines that the current setting of the UE is the voice priority, and determines that the UE needs to support the predetermined service. Preferably, in the case that the predetermined network element includes the MME, the predetermined network element determines that the UE needs to support the predetermined service, and the UE notifies the MME of the setting information, and the MME determines that the current setting of the UE is the voice priority according to the setting information, and determines that the UE needs to support. a predetermined service, where the setting information is used to indicate that the current setting of the UE is voice priority or data priority; or, after the UE determines that the current setting of the UE is the voice priority, the UE notifies the MME of the indication information that the UE needs to support the predetermined service, and the MME The indication information determines that the UE needs to support the predetermined service. Preferably, the current settings are usage and voice settings. Preferably, in a case that the predetermined network element includes the UE, the predetermined network element determines that the UE needs to support the predetermined service, and the UE determines that the UE needs to support the predetermined service, and determines that the UE needs to support the predetermined service, where the UE is related. The information includes at least one of the following: a terminal type of the UE, a function setting of the UE, and a new setting item in the UE indicating whether the UE needs to support the predetermined service. Preferably, if the predetermined network element includes the MME, the predetermined network element determines that the UE needs to support the predetermined service, and the MME determines that the UE needs to support the predetermined service, and the MME determines that the UE needs to support the UE. a predetermined service, where the related information includes at least one of the following: a terminal type of the UE, a function setting of the UE, and a new setting item in the UE indicating whether the UE needs to support the predetermined service; or the UE determines that the related information of the UE indicates that the UE needs After the predetermined service is supported, the UE notifies the MME of the indication information that the UE needs to support the predetermined service, and the MME determines, according to the indication information, that the UE needs to support the predetermined service. Preferably, in a case that the predetermined network element includes the UE, the predetermined network element determines that the UE needs to support the predetermined service, and the UE determines that it has the circuit domain fallback CSFB function or enables the CSFB function, and determines that it needs to support the predetermined service. Preferably, in a case that the predetermined network element includes the MME, the predetermined network element determines that the UE needs to support the predetermined service, the method includes: the UE sends information indicating that the CSFB function is enabled or the CSFB function is enabled to the MME, where the MME indicates that the UE needs to support Or, after the UE determines that it has the CSFB function or the CSFB function is enabled, the UE notifies the UE of the indication information that the UE needs to support the predetermined service, and determines whether the UE needs to support the predetermined service according to the indication information; or The related information of the UE saved in the UE determines that the UE has the CSFB function enabled, and determines that the UE needs to support the predetermined service. Preferably, the predetermined network element determines that the UE needs to support the predetermined service, the method includes: the predetermined network element acquiring, from the predetermined entity, information indicating whether the UE needs to support the predetermined service, where the information is pre-stored in the predetermined entity, where the predetermined entity includes: the home subscriber server The HSS, the home location register HLR, or a pre-set dedicated database; the predetermined network element determination information indicates that the UE needs to support the predetermined service, and then determines that the UE needs to support the predetermined service. Another aspect of the present invention provides a signaling saving activation control system in an idle mode, including: a UE, configured to perform joint TAU and LAU; and an ISR activation control module, configured to deactivate the ISR if a predetermined condition is met Or keep the ISR inactive, wherein the predetermined conditions include: the result of the joint TAU and LAU is that the joint TAU and LAU of only the SMS over SGs are successful, and the UE needs to support For the scheduled service, the scheduled service includes: Other CS services except the short message service. Preferably, the ISR activation control module is located at the UE and/or the mobility management entity MME. Preferably, in the case that the ISR activation control module is located in the UE, the ISR activation control module is configured to determine that the current setting of the UE in which the UE is located is voice priority, and then determine that the UE needs to support the predetermined service. Preferably, in the case that the ISR activation control module is located in the MME, the ISR activation control module is configured to determine, according to the setting information from the UE, that the current setting of the UE is voice priority, and then determine that the UE needs to support a predetermined service, where the setting information is used to indicate The current setting of the UE is the voice priority or the data priority; or the UE is used to determine that the current setting of the UE is the voice priority, and the indication information that the UE needs to support the predetermined service is notified to the ISR activation control module, and the ISR activation control module is used according to the indication. The information determines that the UE needs to support the scheduled service. Preferably, in the case that the ISR activation control module is located in the UE, the ISR activation control module is configured to determine that the UE's related information indicates that the UE needs to support the predetermined service, and then determines that the UE needs to support the predetermined service, where the related information of the UE includes the following information. At least one of: a terminal type of the UE, a function setting of the UE, and a new setting item in the UE indicating whether the UE needs to support the predetermined service. Preferably, in the case that the ISR activation control module is located in the MME, the UE is configured to send its own related information to the ISR activation control module, and the ISR activation control module is configured to determine that the related information indicates that the UE needs to support the predetermined service, and then determine that the UE needs to support. a predetermined service, where the related information includes at least one of the following: a terminal type of the UE, a function setting of the UE, a setting item newly added in the UE indicating whether the UE needs to support the predetermined service, or a related information indication used by the UE to determine the UE After the UE needs to support the predetermined service, the UE needs to notify the ISR activation control module of the indication information that the UE needs to support the predetermined service, and the ISR activation control module is configured to determine, according to the indication information, that the UE needs to support the predetermined service. Preferably, in the case that the ISR activation control module is located in the UE, the ISR activation control module is configured to determine that the UE in which the UE is located has the circuit domain fallback CSFB function or the CSFB function is enabled, and then determine that the UE needs to support the predetermined service. Preferably, in a case that the ISR activation control module is located in the MME, the UE is configured to send information indicating that the CSFB function is enabled or the CSFB function is enabled to the ISR activation control module, where the ISR activation control module is configured to determine, according to the indication information, that the UE needs to support Or the UE is used to determine that it has the CSFB function or the CSFB function is enabled, and then notifies the ISR activation control module of the indication information that the UE needs to support the predetermined service, and the ISR activation control module is used to indicate the information. It is determined that the UE needs to support the predetermined service. The ISR activation control module is configured to determine that the UE needs to support the predetermined service according to the related information of the UE saved in the MME. Preferably, the ISR activation control module is configured to acquire, from the predetermined entity, information indicating whether the UE needs to support the predetermined service, and the determination information indicates that the UE needs to support the predetermined service, and then determine that the UE needs to support the predetermined service, where the information is pre-stored in the predetermined entity. The predetermined entity includes: a home subscriber server HSS, a home location register HLR, or a pre-set dedicated database. A further aspect of the present invention provides a UE, including: an update module, configured to perform a joint TAU and a LAU; an ISR activation control module, configured to deactivate an ISR or keep an ISR inactive if a predetermined condition is met, where The predetermined conditions include: the result of the joint TAU and the LAU is that the joint TAU and the LAU of the SMS over SGs are successful, and the UE needs to support the predetermined service, and the predetermined service includes: other circuit switched CS services except the short message service. With the present invention, when the joint TAU and LAU of only the SMS over SGs are successful and the UE needs to support other CS services except the short message service, the ISR is not activated, and the user may be removed due to the ISR activation. The problem that other CS services beyond the short message service are inaccessible ensures that the UE can be paged when performing CS services such as voice calls. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are set to illustrate,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, In the drawings: FIG. 1 is a schematic diagram of a network architecture of a GSM/UMTS and EPS network according to the related art; FIG. 2 is an ISR activation according to the related art, an SGs activation, an idle state of a UE in an MME, and an MME from FIG. 3 is a schematic diagram of a scenario in which an IMS/VLR receives a paging of a CS service; FIG. 3 is a schematic diagram of a scenario in which a user is inaccessible according to the related art; FIG. 4 is a signaling saving in an idle mode according to Embodiment 1 of the present invention; FIG. 5 is a flowchart of a signaling saving activation control method in an idle mode according to Embodiment 2 of the present invention; 6 is a schematic diagram of an interaction flow applied to a signaling save activation control method in an idle mode according to an example of the present invention; FIG. 7 is a structural block diagram of a control system for signaling save activation in an idle mode according to an embodiment of the present invention; FIG. 8 is a structural block diagram of a UE according to an embodiment of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. Embodiment 1 The embodiment of the present invention provides a signaling saving activation control method in an idle mode, and FIG. 4 is a flowchart of a signaling saving activation control method in an idle mode according to Embodiment 1 of the present invention, as shown in FIG. The method includes:

402. The user equipment UE performs a joint tracking area update TAU and a location area update LAU (also referred to as a joint TAU/LAU in the related art); 404, if the predetermined condition is met, deactivating the ISR or keeping the ISR inactive, The predetermined condition includes: the result of the joint TAU and the LAU is that the joint TAU and the LAU of the SMS over SGs are successful, and the UE needs to support the predetermined service, and the predetermined service includes: other CS services except the short message service. In a specific implementation, if the current ISR is in an active state, the ISR is deactivated if the predetermined condition is met; if the current ISR is in an inactive state, if the predetermined condition is met, the state in which the ISR is inactive is maintained, In other words, the ISR is not activated if the predetermined condition is met. Similar to the related art, determining and deactivating the ISR or maintaining the ISR inactivity in the process may be performed locally by the UE, or may be determined by the MME and indicated to the UE, as described in the example section. In problem scenario 1, when the UE moves back to the already registered RA/LA area, since the ISR is activated, the update process is not initiated, causing subsequent calls and the like to be unrouted to the correct MSC/VLR. In order to solve this problem, when the UE accesses the GERAN/UTRAN, the MSC/VLR 1 initiates an update location procedure to the HSS/HLR, and further updates the MSC/VLR information of the UE currently stored in the HSS/HLR. The new MSC/VLR 1 itself allows the call to be routed to the MSC/VLR 1. The most critical of the above procedures is that the UE can perform a location update procedure to the MSC/VLR 1, and when the ISR is activated, the UE does not initiate an update when it moves back to the RA/LA network region that the GERAN/UTRAN has registered. With the method of the embodiment of the present invention, in the case that only the joint TAU and the LAU of the SMS over SGs are successful and the UE needs to support other CS services except the short message, the ISR is not activated, so that the subsequent UE moves back to the registered state. When the RA/LA area is initiated, an update process is initiated to prevent calls from being routed to the wrong MSC/VLR. In problem scenario 2, the MSC/VLR cannot page to the UE, and the above method of not activating the ISR causes the subsequent update process to be initiated when the UE moves back to the already registered RA/LA area, and the Gs or A/IU-CS is activated. Therefore, the problem that the user is inaccessible due to the MME rejecting the paging of the CS service such as the voice call sent by the MSC/VLR is solved in the scenario. Embodiment 2 In this embodiment, the UE involved in Embodiment 1 needs to support a predetermined service, and specifically includes: the UE needs to support a predetermined service when accessing GERAN and/or UTRAN (also referred to as GERAN/UTRAN in the related art). That is to say, in the case of joint TAU/LAU, if only the joint update of the SMS over SGs is successful, and the UE needs to support services such as CS voice calls when the GERAN/UTRAN is accessed, the ISR is not activated. FIG. 5 is a flowchart of a signaling saving activation control method in an idle mode according to Embodiment 2 of the present invention. As shown in FIG. 5, the method in this embodiment includes: 502. A UE performs joint TAU/LAU in an E-UTRAN.

504. The UE that needs to support the service such as the CS voice call when accessing the GERAN/UTRAN is only successful in the joint update of the SMS over SGs, and the ISR is not activated even if other conditions of the ISR activation are met. The UE is required to support the scheduled service when accessing the GERAN and/or the UTRAN, and the ISR activation control can be performed more accurately. Therefore, the predetermined condition is limited to: only the joint TAU and LAU of the SMS over SGs are successful, and the UE is accessing the GERAN and / or UTRAN need to support the scheduled service, can more reasonably control the ISR to deactivate or remain inactive, to prevent excessive air interface signaling. Embodiment 3 This embodiment describes, on the basis of Embodiment 1 and/or Embodiment 2, that the predetermined condition is satisfied. In this case, before deciding to deactivate the ISR or keep the ISR inactive, the method may further include: the predetermined network element determines that the UE needs to support the predetermined service, where the predetermined network element includes at least one of the following: a UE, an MME. The foregoing predetermined network element (which may also be referred to as a network element for determining and determining ISR activation) may be a UE or an MME. In specific implementation, based on various network deployment considerations, the MME and/or the UE may perform Judge. It should be noted that the network element that determines that the UE needs to support the predetermined service is not limited to the UE and/or the MME. However, in consideration of determining the source of the basis for the UE to support the predetermined service, the UE is determined by using at least one of the two network elements. It is more convenient to support the scheduled service, and the system resource consumption is smaller when compared with other network elements, because the information interaction process required by other network elements to determine whether the UE needs to support the predetermined service may be more and more complicated.

The UE and/or the MME determine that the UE needs to support the predetermined service, which may include, but is not limited to, the following manners, and may be determined according to one or a combination of the following manners and variants.

1. In the case that the predetermined network element includes the UE, the UE determines that the current setting of the UE's own usage and voice setting is voice priority (since the process of service processing and access is similar, the UE is set to voice priority to determine that the UE needs to support voice except If the call service is the same as the other CS services of the short message service, the UE determines that it needs to support the predetermined service. In the case that the predetermined network element includes the MME, the UE notifies the setting information to the predetermined network element, and the setting information is used to indicate the UE. The MME determines that the current setting of the UE is voice priority according to the setting information, and the MME determines that the UE needs to support the predetermined service. The above current settings may be usage and voice settings, or any setting that completes the setting of voice priority or data priority. The method is determined according to whether the voice centric is set in the UE. If voice centric is set in the UE, the UE is considered to need to support CS services such as voice calls (except SMS), otherwise it is considered unnecessary. In the case that the MME needs to perform the above determination and decision, the setting information needs to be transmitted from the UE to the MME. The method may further be that after the UE determines that it needs to support the predetermined service according to the manner, the UE transmits an indication that needs to support the predetermined service to the MME.

2. In the case that the predetermined network element includes the UE, the UE determines that it has the circuit domain fallback CSFB function or enables the CSFB function itself, then the UE determines that it needs to support the predetermined service; if the predetermined network element includes the MME, the UE will indicate After the MME determines that the indication information indicates that the UE needs to support the predetermined service, the MME determines that the UE needs to support the predetermined service after the information that the CSFB function is enabled or the CSFB function is enabled. In this manner, the UE and the MME determine whether the UE has or does not have the CSFB function. If the UE has or enables the CSFB function, the UE is considered to need to support the predetermined service, otherwise it is considered unnecessary. In the case where the MME needs to make a decision, the information is transmitted from the UE to the MME. The method may further be that after the UE determines that it needs to support the predetermined service according to the manner, the UE transmits an indication that needs to support the predetermined service to the MME. The method may further be: if the MME determines that the UE is enabled with the CSFB function according to the related information of the UE saved in the UE, the MME determines that the UE needs to support the predetermined service.

3. In the case that the predetermined network element includes the UE, the UE determines that the UE's own related information indicates that the UE needs to support the predetermined service, where the related information includes at least one of the following:

The function setting of the UE, the new setting in the UE indicating whether the UE needs to support the predetermined service, the UE determines that it needs to support the predetermined service; if the predetermined network element includes the MME, the UE sends the related information to the MME, where The related information includes at least one of the following: a terminal type of the UE, a function setting of the UE, and a new setting item in the UE. If the MME determines that the related information indicates that the UE needs to support the predetermined service, the MME determines that the UE needs to support the predetermined service. The method is to newly add a setting in the UE, or the UE can determine whether the UE needs to support the predetermined service according to its own terminal type and related settings (for example, function setting). In the case that the MME needs to perform the above determination and decision, the UE needs to transmit the above related information to the MME. The method may further be that after the UE determines that it needs to support the predetermined service according to the manner, the UE transmits an indication that needs to support the predetermined service to the MME.

4. The predetermined network element acquires, from the predetermined entity, information indicating whether the UE needs to support the predetermined service, wherein the information is pre-stored in the predetermined entity, and the predetermined entity includes: a home subscriber server HSS, a home location register HLR, or a preset dedicated The judgment information indicates that the UE needs to support the predetermined service; and the predetermined network element determination information indicates that the UE needs to support the predetermined service. In this manner, the HSS/HLR subscription data needs to be signed and saved to indicate whether the UE supports the predetermined service. The MME can obtain the information from the HSS/HLR, and the UE can obtain the information through the core network element such as the MME. Similarly, it can also be implemented by a dedicated database, and the MME and the UE obtain information by accessing the database. The above four methods can determine whether the UE needs to support the scheduled service, where the first and second modes are relatively straightforward, and the third mode is relatively simple, and the functions of the newly added setting items in the UE can be expanded. The exhibition facilitates the integration of other indication functions. The fourth method facilitates the network side to grasp the situation of the UEs it serves, which is convenient for management. Example FIG. 6 is a schematic diagram of an interaction flow applied to a network in an idle mode signaling idle activation control method according to an example of the present invention. FIG. 6 is a specific implementation of the present invention by taking a voice call service as an example based on the network deployment scenario shown in FIG. 3. As shown in Figure 6, it includes:

602. The UE accesses from the GERAN/UTRAN, and performs an update process. According to different network modes, the process may include one of the following 602-1 and 602-2:

602-1, in network mode 1, the UE initiates joint routing area/location area registration (attach attach or joint RAU/LAU) through GERAN/UTRAN, the message carries the user identifier, and GERAN/UTRAN takes the current location of the UE. Information is brought to the SGSN. The SGSN determines the corresponding MSC/VLR according to the current location information of the UE, and initiates a CS registration request (location update request) to the MSC/VLR 1.

602-2, in the network mode ΠΙ/ΠΙ, the UE directly initiates a CS registration request to the MSC/VLR through the GERAN/UTRAN, where the message carries the user identifier, and the GERAN/UTRAN selects the MSC/VLR 1 for the UE according to the current location of the UE, and The current location information of the UE is brought to the MSC/VLR 1.

604. The MSC/VLR 1 performs a CS registration process of the UE, and the MSC/VLR 1 initiates an update location and inserts user data into the HSS/HLR of the user, and the HSS/HLR stores the information of the MSC/VLR 1 in the record of the UE. 606. The MSC/VLR 1 receives a different source of the location update request, and the process may be specifically one of the following 606-1 and 606-2:

606-1, if the MSC/VLR 1 is a location update request received from the SGSN, after the MSC/VLR 1 registration is completed, a CS registration response is returned to the SGSN, and the CS registration response carries the registered location information LAI and the MSC/VLR. 1 Temporary Mobile Subscriber Identity (TMSI) assigned to the UE. The SGSN returns a joint attach response message to the UE, which carries the location information LAI and TMSI registered in the MSC/VLR 1, and the location information RAI and the packet domain TMSI (Packet TMSI, referred to as P-TMSI) registered by the SGSN „ So far, the UE Complete the joint registration in the SGSN, MSC/VLR 1, establish a Gs association between the SGSN and the MSC/VLR 1, and activate the Gs interface. Subsequently, when the UE moves in the GERAN/UTRAN, the network is located. When the RA of the area changes, the location information of the UE is updated to the SGSN and the MSC/VLR 1 in the process. In the process, since the MSC/VLR does not change, the MSC/VLR 1 does not initiate an update location procedure to the HSS/HLR. When the MSC/VLR 1 receives the call information and needs to page the UE, the MSC/VLR 1 sends the paging to the SGSN according to the Gs association, and the SGSN can page to the UE according to the location information recorded therein.

606-2. If the MSC/VLR 1 is the location update request received by the A/IU-CS, after the MSC/VLR 1 registration is completed, the location update response message is returned to the UE by the GERAN/UTRAN, where the UE is in the MSC/ Location information LAI and TMSI registered in VLR 1. At this point, the location area where the UE is currently located is recorded in the MSC/VLR 1, and the A/IU-CS interface is activated. Subsequently, when the UE moves in the GERAN/UTRAN, the location area of the UE changes to 4, the UE sends a location update message to the MSC/VLR 1, and the MSC/VLR 1 updates the location information of the UE stored therein to the latest location. Information, in this process, because the MSC/VLR has not changed, the MSC/VLR 1 does not initiate an update location procedure to the HSS/HLR. When the MSC/VLR 1 receives the call information and needs to page the UE, it can page the UE through the A/IU-CS interface according to the location information recorded therein.

608. If the wireless signal strength changes or the user moves or other reasons, the UE accesses from the E-UTRAN. The UE initiates a joint TAU/LAU procedure with the user identification P-TMSI and RAI.

610. The MME finds the SGSN originally registered by the UE according to the P-TMSI and the RAI, and acquires the UE context from the SGSN. In this process, an ISR association can be established between the SGSN and the MME.

612. The MME finds the MSC/VLR 2 according to the information carried in the TAU message, the location information of the network area where the UE is currently located, and the corresponding configuration rule, and initiates a CS update process to the MSC/VLR 2.

614. The MSC/VLR 2 performs a CS registration process of the UE, and the MSC/VLR 2 initiates an update location and inserts user data into the HSS/HLR. The MSC/VLR where the UE is currently located in the HSS/HLR is updated to the MSC/VLR 2. The HSS/HLR sends a Cancel Location Update message to the MSC/VLR 1, and receiving the message by the MSC/VLR 1 will delete the UE information stored therein or identify the information as invalid.

616. After the MSC/VLR 2 registration is completed, return a CS update response to the MME, where the location information LAI and the temporary UE identity TMSI allocated by the MSC/VLR 2 are carried. 618, according to the determination to deactivate the ISR or keep the ISR inactive (MME or UE), the process may specifically include one of the following 618-1 and 618-2:

618-1, the MME determines that the UE can only perform the joint update of the SMS over SGs, and the UE needs to support the CS voice service (specifically, the UE needs to support the CS voice service when the UE is accessed by the GERAN/UTRAN), and the ISR is not activated. After completing the update, the MME returns a joint TA/LA update response message to the UE, indicating that the joint update is successful, the SMS over SGs only identifier, and the ISR are not activated.

618-2: After completing the update, the MME returns a joint TA/LA update response message to the UE. Since only SMS over SGs are supported, the MME will indicate that the update was successful in the message, and indicates that only the SMS over SGs update is successful and the ISR is activated. The UE receives the joint TA/LA update response message, and according to the SMS over SGs only indication in the message, the ISR activation identifier, according to the method of the embodiment of the present invention, the UE needs to support the CS voice service (specifically, the UE may be connected in the GERAN/UTRAN). The UE needs to support the CS voice service. The UE decides not to activate the ISR and set the corresponding identifier. Otherwise, the UE sets the corresponding identifier according to the ISR activation information setting and other factors indicated by the MME according to the related technology. In the specific implementation, the above 618-1 may also be executed when 610 is performed.

620. The UE sets an ISR related flag, and sets the ISR to not activate the corresponding identifier.

The UE moves back from the E-UTRAN to the already registered GERAN/UTRAN network zone i or access. Since the ISR inactivity flag is set in the UE, if the network operation mode of the GERAN/UTRAN where the UE camps is I, the UE will initiate a joint routing area/location area update procedure; if the network operation mode of the resident GERAN/UTRAN is Π /ΠΙ, the UE will initiate the LAU and RAU update process.

622. According to different network modes, the process may be specifically one of the following 622-1 and 622-2:

622-1. In network mode 1, the UE initiates a joint RAU/LAU through the GERAN/UTRAN, and the message carries the user identifier, and the GERAN/UTRAN brings the current location information of the UE to the SGSN. The SGSN finds the MSC/VLR 1 based on the current location information of the UE and initiates a CS registration request to the MSC/VLR 1.

622-2, in the network mode Π/ΠΙ, the UE initiates a location update through the GERAN/UTRAN, the message carries the user identifier, and the GERAN/UTRAN selects the UE according to the current location of the UE. MSC/VLR 1 and bring the current user location information of the UE to the MSC/VLR 1.

624, the MSC/VLR 1 receives the location update message, because the data of the UE is not saved or the data identifier of the UE is invalid, the process of initiating the update location and inserting the user data to the HSS/HLR of the user, the HSS/HLR receives the update. The location message, the user data is sent to the MSC/VLR 1, and the information of the MSC/VLR 1 is saved in the record of the UE, and the HSS/HLR sends a cancel location message to the MSC/VLR 2, and the MSC/VLR 2 will identify the user data therein. Invalid or deleted;

626, according to the source of the location update request received by the MSC/VLR 1, the process may be specifically one of the following 626-1 and 626-2:

626-1. If the MSC/VLR 1 is a location update request received from the SGSN, after the MSC/VLR 1 registration is completed, a CS registration response is returned to the SGSN. The SGSN returns a joint attach response message to the UE. So far, the UE completes the joint registration in the SGSN, the MSC/VLR 1, the Gs association is established between the SGSN and the MSC/VLR 1, and the Gs interface is activated. Subsequently, the MSC/VLR 1 can rely on the Gs interface and the SGSN to page the UE.

626-2. If the MSC/VLR 1 is a location update request received through the A/IU-CS interface, after the MSC/VLR 1 registration is completed, the location update response message is returned to the UE through the GERAN/UTRAN. At this point, the location area where the UE is currently located is recorded in the MSC/VLR 1, and the A/IU-CS interface is activated. Subsequently, the MSC/VLR 1 can page the UE through the A/IU-CS interface and the location information stored therein. The flow shown in FIG. 6 and the method provided by the embodiment of the present invention can also be applied to the problem scenario 2. At this time, the MSC/VLR 1 and the MSC/VLR 2 shown in FIG. 6 are combined. In this scenario, when the UE moves back to the area where GERAN/UTRAN has been registered, because Gs or A/IU-CS is activated, the MSC/VLR will page through the SGSN or A/IU-CS, and can always page to UE. The process in this scenario, except when the MSC/VLR receives the location update message sent by the MME, does not initiate the update location and insert user data process (ie, 614) to the HSS/HLR, and the rest is the same as the process shown in FIG. Let me repeat. In the above example, the voice call service is taken as an example to describe the method and application flow of the embodiment of the present invention. However, the method can also be applied to call-independent supplementary services, LCS services, and the like in addition to voice call services and SMS. Other CS services, that is, the method provided in this embodiment can be applied to all CS services except short messages. In summary, in the method provided by this embodiment, when the UE performs joint TAU/LAU, if only The joint TAU/LAU of the SMS over SGs is successful, and the UE needs to support other CS services except the short message service, and the ISR is not activated. In this way, the subsequent UE initiates a joint RA/LA update or LAU procedure during GERAN/UTRAN access because the ISR is not activated, so that the UE registers with the MSC/VLR of the current GERAN/UTRAN network area. In the case of a change in the MSC/VLR, the MSC/VLR where the UE is currently located will update the location to the HSS/HLR, so that the correct MSC/VLR information will be recorded in the HSS/HLR to ensure that the call can be routed to the corresponding MSC/ VLR. The MSC/VLR can page the UE through the SGSN according to the information stored therein, otherwise the UE can be paged to the UE according to the location information stored in the MSC/VLR through the A/IU-CS interface. According to an embodiment of the present invention, there is also provided a control system for signaling saving activation in an idle mode, and FIG. 7 is a structural block diagram of a control system for signaling saving activation in an idle mode according to an embodiment of the present invention. As shown in FIG. 7, the system includes: a UE 72 for performing a joint TAU and a LAU; an ISR activation control module 74, for deactivating an ISR or maintaining an ISR inactivity if a predetermined condition is met, wherein a predetermined condition Including: the result of the joint TAU and the LAU is that the joint TAU and the LAU of the SMS over SGs are successful, and the UE 72 needs to support the predetermined service, and the predetermined service includes: other CS services except the short message service. It should be noted that the above ISR activation control module 74 may be located in the MME and/or in the UE 72. Preferably, the above system may further include: a determining module, configured to determine that the UE needs to support a predetermined service. It should be noted that the above determining module may be located in the MME and/or in the UE 72, or it may be an MME or a UE 72. According to an embodiment of the present invention, a UE is further provided. FIG. 8 is a structural block diagram of a UE according to an embodiment of the present invention. As shown in FIG. 8, the UE includes: an update module 82, configured to perform a joint The tracking area update TAU and the location area update LAU; the ISR activation control module 84 is configured to deactivate the ISR or keep the ISR inactive if the predetermined condition is met, wherein the predetermined condition includes: the result of the joint TAU and the LAU is only The joint TAU and LAU of the SMS over SGs are successful, and the UE needs to support the predetermined service, and the predetermined service includes: other circuit switched CS services except the short message service. In summary, the solution provided by the embodiment of the present invention solves the problem that when the UE that needs to support other CS services except the short message moves back to the registered RA/LA area, the ISR activation does not initiate the update, and the subsequent call cannot be performed. The problem of routing to the correct MSC/VLR or MSC/VLR cannot page to the UE ensures that the UE can be paged when performing CS services such as voice calls. It should be noted that the steps shown in the flowchart of the accompanying drawings may be performed in a computer system, and, although the logical order is shown in the flowchart, in some cases, the order may be different from Perform the steps shown or described. Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device, or they may be separately fabricated into individual integrated circuit modules, or they may be Multiple modules or steps are made into a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the scope of the present invention are intended to be included within the scope of the present invention.

Claims

Claim

A signaling saving ISR activation control method in an idle mode, comprising:

User equipment UE performs joint tracking area update TAU and location area update LAU;

Deactivating the ISR or keeping the ISR inactive if the predetermined condition is met, wherein the predetermined condition includes: the result of the joint TAU and LAU is that only the joint TAU and LAU of the SMS over SGs are successful, and the UE needs The predetermined service is supported, and the predetermined service includes: other circuit switched CS services except the short message service.

The method according to claim 1, wherein the UE needs to support the predetermined service comprises: the UE needs to support the predetermined service when accessing the GERAN and/or the UTRAN.

The method according to claim 1, wherein before deactivating the ISR or keeping the ISR inactive, the method further includes:

The predetermined network element determines that the UE needs to support the predetermined service, where the predetermined network element includes at least one of the following: the UE and the MME.

4. The method of claim 3, wherein

In the case that the predetermined network element includes the UE, the determining, by the predetermined network element, that the UE needs to support the predetermined service includes: determining that the current setting of the UE is voice priority, determining that the UE needs to support The predetermined service;

In the case that the predetermined network element includes the MME, the determining, by the predetermined network element, that the UE needs to support the predetermined service, includes: the UE notifying the MME of setting information, where the MME is in the setting Determining that the current setting of the UE is voice priority, and determining that the UE needs to support the predetermined service, where the setting information is used to indicate that the current setting of the UE is voice priority or data priority; or After the UE determines that the current setting of the UE is the voice priority, the UE notifies the MME of the indication information that the UE needs to support the predetermined service, and the MME determines, according to the indication information, that the UE needs to support the reservation. business.

5. The method according to claim 4, wherein the current setting is usage and voice setting.

6. The method of claim 3, wherein

In the case that the predetermined network element includes the UE, the determining, by the predetermined network element, that the UE needs to support the predetermined service, includes: determining, by the UE, that the related information of the UE indicates that the UE needs to support the predetermined service, And determining, that the UE needs to support the predetermined service, where the related information of the UE includes at least one of the following: a terminal type of the UE, a function setting of the UE, and a newly added indication in the UE whether the UE is Need to support the setting items of the scheduled business;

In the case that the predetermined network element includes the MME, the determining, by the predetermined network element, that the UE needs to support the predetermined service, includes: the UE sends its own related information to the MME, where the MME determines that The related information indicates that the UE needs to support the predetermined service, and then determines that the UE needs to support the predetermined service, where the related information includes at least one of the following: a terminal type of the UE, and a function of the UE. And setting, in the UE, a setting item indicating whether the UE needs to support the predetermined service; or, after the UE determines that the related information of the UE indicates that the UE needs to support the predetermined service, the UE needs the UE And the MME that is configured to support the predetermined service is notified to the MME, and the MME determines, according to the indication information, that the UE needs to support the predetermined service.

7. The method of claim 3, wherein

In a case that the predetermined network element includes the UE, the determining, by the predetermined network element, that the UE needs to support the predetermined service, includes: determining, by the UE, that the circuit domain has a CSFB function or a CSFB function is enabled, The UE needs to support the predetermined service. If the predetermined network element includes the MME, the predetermined network element determines that the UE needs to support the predetermined service, and the UE includes the CSFB function. Or the information that is enabled with the CSFB function is sent to the MME, where the MME determines that the UE needs to support the predetermined service according to the indication information; or, after the UE determines that it has the CSFB function or the CSFB function is enabled, And the MME sends the indication information that the UE needs to support the predetermined service to the MME, where the MME determines that the UE needs to support the predetermined service, or the MME The related information of the UE saved in itself determines that the UE is enabled with the CSFB function, and then determines that the UE needs to support the predetermined service.

The method of claim 3, wherein the determining, by the predetermined network element, that the UE needs to support the predetermined service comprises: The predetermined network element obtains, from the predetermined entity, information indicating whether the UE needs to support the predetermined service, where the information is pre-stored in the predetermined entity, where the predetermined entity includes: a home subscriber server HSS, Home location register HLR, or a dedicated database set in advance;

And the predetermined network element determines that the information indicates that the UE needs to support the predetermined service, and determines that the UE needs to support the predetermined service.

9. A signaling saving ISR activation control system in idle mode, characterized in that it comprises:

UE, used to perform joint TAU and LAU;

The ISR activation control module is configured to deactivate the ISR or keep the ISR inactive if the predetermined condition is met, where the predetermined condition includes: the result of the joint TAU and the LAU is a joint TAU and LAU of only the SMS over SGs Successfully, and the UE needs to support a predetermined service, where the predetermined service includes: other CS services except the short message service.

10. The system according to claim 9, wherein the ISR activation control module is located at the UE and/or the mobility management entity MME.

The system according to claim 10, wherein, in a case that the ISR activation control module is located in the UE, the ISR activation control module is configured to determine that a current setting of a UE in which the UE is located is a voice priority, Determining that the UE needs to support the predetermined service; where the ISR activation control module is located in the MME, the ISR activation control module is configured to determine, according to setting information from the UE, that the current setting of the UE is If the voice is prioritized, it is determined that the UE needs to support the predetermined service, where the setting information is used to indicate that the current setting of the UE is voice priority or data priority; or the UE is used to determine that the current setting of the UE is After the voice is prioritized, the indication information that the UE needs to support the predetermined service is notified to the ISR activation control module, where the ISR activation control module is configured to determine, according to the indication information, that the UE needs to support the predetermined service.

12. The system of claim 10, wherein

In the case that the ISR activation control module is located in the UE, the ISR activation control module is configured to determine that the related information of the UE where the UE is located indicates that the UE needs to support the predetermined service, and determine that the UE needs to support the a predetermined service, where the phase of the UE The information includes at least one of the following: a terminal type of the UE, a function setting of the UE, and a setting item added in the UE indicating whether the UE needs to support a predetermined service;

In the case that the ISR activation control module is located in the MME, the UE is configured to send its own related information to the ISR activation control module, where the ISR activation control module is configured to determine that the related information indicates the The UE needs to support the predetermined service, and then determines that the UE needs to support the predetermined service, where the related information includes at least one of the following: a terminal type of the UE, a function setting of the UE, and the UE. The newly added setting item indicating whether the UE needs to support the predetermined service; or the indication that the UE needs to support the predetermined service after the related information indicating that the UE needs to support the predetermined service The information is notified to the ISR activation control module, and the ISR activation control module is configured to determine, according to the indication information, that the UE needs to support the predetermined service.

13. The system of claim 10, wherein

In the case that the ISR activation control module is located in the UE, the ISR activation control module is configured to determine that the UE in which the UE is located has the circuit domain fallback CSFB function or the CSFB function is enabled, and then determine that the UE needs to support the predetermined service. ;

In the case that the ISR activation control module is located in the MME, the UE is configured to send information indicating that it has a CSFB function or a CSFB function enabled to the ISR activation control module, where the ISR activation control module is used. Determining, according to the indication information, that the UE needs to support the predetermined service; or, after the UE is used to determine that the UE has the CSFB function or the CSFB function is enabled, the UE needs to notify the indication information that the UE needs to support the predetermined service. The ISR activation control module, where the ISR activation control module is configured to determine that the UE needs to support the predetermined service by using the indication information; or the ISR activation control module is configured to save the The related information of the UE determines that the UE is enabled with the CSFB function, and determines that the UE needs to support the predetermined service.

The system according to claim 10, wherein the ISR activation control module is configured to acquire, from a predetermined entity, information indicating whether the UE needs to support the predetermined service, and determine that the information indicates the The UE needs to support the predetermined service, and then determines that the UE needs to support the predetermined service, where the information is pre-stored in the predetermined entity, where the predetermined entity includes: a home subscriber server HSS, a home location register HLR, Or a pre-set dedicated database.

15. A UE, characterized in that it comprises: An update module for performing joint TAU and LAU;

The ISR activation control module is configured to deactivate the ISR or keep the ISR inactive if the predetermined condition is met, wherein the predetermined condition includes: the result of the joint TAU and the LAU is the joint TAU and LAU success of only the SMS over SGs, and the UE The scheduled service needs to be supported, and the predetermined service includes: other circuit switched CS services except the short message service.