CN113596956B

CN113596956B - ISR management method, MME, SGSN and ISR management system

Info

Publication number: CN113596956B
Application number: CN202110918753.0A
Authority: CN
Inventors: 张余
Original assignee: China United Network Communications Group Co Ltd
Current assignee: China United Network Communications Group Co Ltd
Priority date: 2021-08-11
Filing date: 2021-08-11
Publication date: 2023-03-24
Anticipated expiration: 2041-08-11
Also published as: CN113596956A

Abstract

The invention discloses an ISR management method, an MME, an SGSN and an ISR management system, wherein the ISR management method comprises the following steps: receiving context request information sent by a serving GPRS support node SGSN responding to a routing area update RAU request triggered by a mobile terminal; obtaining SGs interface state information contained in the context request information; and if the SGs interface state information is in a deleted state, returning context response information carrying an idle state signaling optimization ISR (idle state signaling reduction) instruction to the SGSN, so that the SGSN sends RAU (random access unit) receiving information containing the ISR deactivation instruction to the mobile terminal according to the ISR deactivation instruction. The mobile terminal is instructed not to activate the ISR, so that the problem that the SGs interface cannot be reestablished due to the activation of the ISR, and then paging is unreachable can be avoided.

Description

ISR management method, MME, SGSN and ISR management system

Technical Field

The invention relates to the technical field of communication, in particular to an ISR management method, an MME, an SGSN and an ISR management system.

Background

A typical CSFB (Circuit Switched Fallback) service flow mainly includes a joint attachment, a location update, a calling (MO) CSFB flow, a called (MT) CSFB flow, and a detach flow.

Currently, when a mobile terminal with an Idle mode Signaling Reduction (ISR) capability performs some services (for example, called services) on the basis of completing joint attachment, and an LAU (Location Area Update) needs to be performed, the mobile terminal sends an LAU request to an MSC, and the MSC deletes an SGs interface after receiving the LAU request. While subsequently establishing a call, the mobile terminal performs RAU (Route Area Update), and in a process of performing RAU, the ISR of the mobile terminal is activated. In the call flow performed based on the CSFB, when the mobile terminal ends the call, the mobile terminal needs to return to an LTE (Long Term Evolution) network, and since the mobile terminal activates the ISR, if a TAI (Tracking Area Identity) of a returned cell is in a TAI list (Tracking Area list) during the joint attachment, the mobile terminal does not perform a Tracking Area Update (TAU), so that the MSC does not perform the reestablishment of the SGs interface. However, because the MSC deletes the SGs interface in the previous procedure, the MSC and the MME cannot communicate with each other, and when there is an incoming call, the paging request cannot be sent to the MME through the MSC, so that the paging cannot be sent to the mobile terminal.

Disclosure of Invention

Therefore, the invention provides an ISR management method, an MME, an SGSN and an ISR management system, which aim to solve the problem that paging can not be sent due to ISR activation of a mobile terminal in a call flow of a CSFB service flow in the prior art.

In order to achieve the above object, in a first aspect, the present invention provides an ISR management method, including:

receiving context request information sent by a serving GPRS support node SGSN responding to a routing area update RAU request triggered by a mobile terminal;

obtaining SGs interface state information contained in the context request information;

and if the SGs interface state information is in a deleted state, returning context response information carrying an idle state signaling optimization (ISR) command of inactivation to the SGSN, so that the SGSN sends RAU acceptance information containing the ISR command of inactivation to the mobile terminal according to the ISR command of inactivation.

In some examples, if the SGs interface state information is a delete state, returning context response information carrying an idle state signaling optimization ISR deactivation instruction to the SGSN, so that after the SGSN sends RAU accept information including the idle state signaling optimization ISR deactivation instruction to the mobile terminal according to the idle state signaling optimization ISR deactivation instruction, the method further includes:

and responding to a joint location updating request sent by the mobile terminal when the mobile terminal returns to the LTE network, and sending the location updating request to a Mobile Switching Center (MSC) to enable the MSC to establish an SGs interface.

In some examples, before receiving the context request information sent by the serving GPRS support node SGSN in response to the mobile terminal triggered routing area update RAU request, the method further comprises:

and performing joint attachment with the mobile terminal.

In some examples, the jointly attaching with the mobile terminal specifically includes:

receiving an attachment request sent by a mobile terminal, and sending a position updating request message to a corresponding Visitor Location Register (VLR);

and responding to the confirmation information which is created by the VLR according to the location updating request message and is fed back by the SGs interface corresponding to the mobile terminal, and sending an attachment acceptance message to the mobile terminal.

In some examples, after the jointly attaching with the mobile terminal, the method further comprises:

receiving a paging request sent by an MSC (mobile switching center) and forwarding the paging request to a corresponding mobile terminal so that the mobile terminal feeds back an extended service request according to the paging request;

and receiving the extended service request and sending a cell fallback instruction to the mobile terminal so that the mobile terminal performs cell fallback.

In some examples, after receiving the extended service request and sending a cell fallback instruction to the mobile terminal to make the mobile terminal perform cell fallback, the method further includes:

if the location area code corresponding to the mobile terminal cell fallback is different from the location area code corresponding to the combined attachment, receiving an SGs interface deletion notification sent by the MSC, wherein the SGs interface deletion notification is generated after the MSC responds to a location area update LAU request sent by the mobile terminal to delete the SGs interface;

and setting the SGs interface state information of the mobile terminal to be in a deletion state according to the SGs interface deletion notification.

In some examples, the mobile terminal is an ISR-capable mobile terminal.

In a second aspect, the present invention provides an ISR management method, including:

responding to a routing area update RAU request triggered by the mobile terminal to generate context request information carrying SGs interface state information, and sending the context request information to the MME;

receiving context response information fed back by the MME according to the SGs interface state information, wherein if the SGs interface state information is a deletion state, an idle state signaling optimization (ISR) command of non-activation is carried in the context response information;

and if the context response information carries an ISR deactivation instruction, generating RAU acceptance information carrying the ISR deactivation instruction, and sending the RAU acceptance information to the mobile terminal to indicate the mobile terminal to deactivate the ISR.

In a third aspect, the present invention provides a mobility management entity MME, including:

a first receiving unit, configured to receive context request information sent by a serving GPRS support node SGSN in response to a routing area update RAU request triggered by a mobile terminal;

an obtaining unit, configured to obtain SGs interface state information included in the context request information;

and the first sending unit is used for returning context response information carrying an idle state signaling optimization ISR deactivation instruction to the SGSN if the SGs interface state information is in a deletion state, so that the SGSN sends RAU acceptance information containing the ISR deactivation instruction to the mobile terminal according to the ISR deactivation instruction.

In a fourth aspect, the present invention provides a receiving serving GPRS support node SGSN, comprising:

a second sending unit, configured to generate context request information carrying SGs interface state information in response to a routing area update RAU request triggered by the mobile terminal, and send the context request information to the MME;

a second receiving unit, configured to receive context response information fed back by the MME according to the SGs interface state information, where if the SGs interface state information is in a deleted state, the context response information carries an idle signaling optimization ISR deactivation instruction;

and a third sending unit, configured to generate RAU acceptance information carrying the ISR deactivation instruction if the context response information carries the ISR deactivation instruction, and send the RAU acceptance information to the mobile terminal, so as to indicate that the mobile terminal does not activate ISR.

In a fifth aspect, the present invention provides an ISR management system, including the MME and/or the SGSN.

In a sixth aspect, the present invention provides an electronic device, comprising:

at least one processor; and

a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,

the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method described above.

In a seventh aspect, the present invention provides a non-transitory computer readable storage medium having stored thereon computer instructions for causing the computer to perform the method according to the above.

The invention has the following advantages:

in the ISR management method provided in the embodiment of the present invention, after the mobile terminal completes the association attachment in the CSFB-based service flow, an LAU needs to be performed when some services, such as a called service, are performed, and the SGs interface is deleted by the MSC in the LAU flow. In the ISR management method provided by the invention, the SGSN sends context request information to the MME after receiving the RAU request of the mobile terminal, wherein the context request information comprises SGs interface state information of the terminal, the MME generates context response information according to the SGs interface state information and feeds the context response information back to the SGSN, if the SGs interface state information is a deletion state, the MME carries an ISR deactivation instruction in the context response information, so that the SGSN sends RAU receiving information carrying the ISR deactivation instruction to the mobile terminal, and the mobile terminal is instructed not to activate ISR. Therefore, after the call is finished and the mobile terminal returns to the LTE network, the ISR is not activated, so that the location updating can be carried out, the MSC can reestablish the SGs interface in the location updating, and the situation that the subsequent paging cannot be sent due to the fact that the ISR is activated, the mobile terminal cannot possibly carry out the location updating when returning to the LTE network, and the SGs interface cannot be reestablished can be avoided.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.

Fig. 1 is a flowchart illustrating an ISR management method according to an embodiment of the present invention;

fig. 2 is a second flowchart illustrating an ISR management method according to an embodiment of the present invention;

fig. 3 is a third schematic flowchart of an ISR management method according to an embodiment of the present invention;

fig. 4 is a fourth flowchart illustrating an ISR management method according to an embodiment of the present invention;

fig. 5 is a flowchart illustrating an ISR management method according to another embodiment of the present invention;

fig. 6 is a schematic structural diagram of an MME according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of an SGSN according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.

The ISR management method provided by the embodiment of the invention can be applied to an ISR management system comprising a mobile terminal, an MME, an SGSN and an MSC. The system may include an MSC (Mobile Switching Center), an MME (Mobility Management Entity), an SGSN (Serving GPRS Support Node), and the like. The MSC mobile switching center is also known as a Mobile Telephone Switching Office (MTSO). The mobile switching center is the heart of a CDMA cellular mobile communication system, which controls the system's fate and is connected to other systems (e.g., fixed telephone network, GSM network, etc.) through the CDMA system. At the same time, it also controls the working state of base station and mobile station, and implements interconnection of mobile users and various soft switching and hard switching of mobile station. All base stations are wired to the MSC, including both service and control lines. The MSC feeds the signals obtained from one or more base stations to a selector and corresponding vocoder. The MME is a storage place of the user subscription data in the current network and is responsible for non-access stratum signaling management from the mobile terminal to the network, the security verification function of the mobile terminal, the mobility management of the mobile terminal, the tracking and paging management function and the bearing management in the idle mode of the user. The SGSN is a service support point for accessing GERAN and UTRAN users to the core network, and is similar to the MME in function and is responsible for the functions of position updating, paging management, bearing management and the like of the users.

Moreover, the method provided in the embodiment of the present invention is performed in a service flow of LTE (Long Term Evolution) voice based on a 3GPP (3 rd Generation Partnership Project) standard of a communication technology for providing a voice service in a CSFB (Circuit Switched Fallback) network. When the UE under LTE coverage processes a voice service, the terminal first falls back to a CS (Circuit Switched Domain) network, and processes the voice service in the CS network, so as to achieve the purpose of reusing the existing CS Domain device to provide a traditional voice service for a user in the LTE network. The CSFB uses preconditions: the circuit domain fallback can be used only when a user has a CSFB function in an overlapping coverage area of an E-UTRAN (UMTS Terrestrial Radio Access Network ) and a UTRAN/GERAN (GSM Radio Access Network, GSM/EDGE Radio Access Network). The Mobile terminal firstly performs joint attachment on an EPC (Evolved Packet Core) through an LTE network, and informs an MSC (Mobile switching center) at a switching side through an MME (Evolved Packet Core) of the EPC, when the Mobile terminal starts to call, the MME can guide the Mobile terminal to perform cell fall back, so that the Mobile terminal falls back to a GSM (Global system for Mobile Communication) to establish voice with the MSC, and after the call is finished, the Mobile terminal returns to the LTE network.

In the related art, a Mobile terminal with an Idle mode Signaling Reduction (ISR) capability performs joint attachment first, after the joint attachment is completed, the ISR is not activated at this time, when there is an incoming call, an MSC (Mobile Switching Center) sends a paging request to an MME (Mobile management Entity), the MME sends the paging request to the Mobile terminal, the Mobile terminal sends an extended service request to the MME after receiving the paging request, and the MME instructs the Mobile terminal to perform cell fallback. After the mobile terminal falls back from the cell, if the LAI (Location Area identity) of the fallen back cell is different from the LAI during the association attachment, the Location Area Update (LAU) needs to be performed first, and the MSC deletes the SGs interface after receiving the LAU request. Then the mobile terminal performs RAU (Route Area Update) while establishing a call, the mobile terminal sends an RAU request to an SGSN (Serving GSN, serving GPRS support node), the SGSN sends context request information to an MME after receiving the RAU request, the SGSN sends RAU acceptance information to the mobile terminal after receiving the context response information fed back by the MME, and the RAU acceptance information contains an ISR activation instruction, so that the mobile terminal activates ISR. In the call flow performed based on the CSFB, when the mobile terminal ends the call, the mobile terminal needs to return to an LTE (Long Term Evolution) network, and since the mobile terminal activates ISR, if a Tracking Area Identity (TAI) of a returned cell is in a TAI list during joint attachment, the mobile terminal does not perform TAU, and thus does not perform SGs interface reconstruction. However, because the MSC deletes the SGs interface, the MSC and the MME cannot communicate with each other, and when there is an incoming call, the paging request cannot be sent to the MME through the MSC, so that the paging cannot be sent.

In order to solve the above problem, in a first aspect, referring to fig. 1, the present invention provides an ISR management method, applied to an MME side, the method including:

and S11, receiving context request information sent by the serving GPRS support node SGSN responding to the RAU request triggered by the mobile terminal.

Specifically, under the service flow based on the CSFB, the mobile terminal performs RAU while establishing a call to update the routing area location, that is, the mobile terminal sends an RAU request to the SGSN, and adds the mobile terminal identifier to the RAU request. After receiving the RAU request carrying the mobile terminal identifier, the SGSN sends context request information carrying the mobile terminal identifier to the MME, where the mobile terminal identifier includes SGs interface state information.

And S12, obtaining SGs interface state information contained in the context request information.

Specifically, the SGs interface information state includes an establishment state and a deletion state, the establishment state identifies that the SGs interface can normally perform communication, and the deletion state identifies that the SGs interface has been deleted.

After the MME acquires the context request information carrying the mobile terminal identification, the mobile terminal identification is extracted, and whether the SGs interface of the mobile terminal is deleted or not is judged according to the SGs interface information state in the mobile terminal identification.

And S13, if the SGs interface state information is in a deletion state, returning context response information carrying the idle state signaling optimization ISR deactivation instruction to the SGSN, and enabling the SGSN to send RAU receiving information containing the ISR deactivation instruction to the mobile terminal according to the ISR deactivation instruction.

Specifically, if the SGs interface state information is the setup state, the MME returns context response information to the SGSN, where the context response information may include an ISR activation instruction or an ISR deactivation instruction, and specifically, the requirement is defined. And if the interface state information is a deletion state, the MME returns context response information carrying an idle state signaling optimization (ISR) instruction which is not activated to the SGSN. And after receiving the context response information returned by the MME, the SGSN judges whether the context response information contains an ISR deactivation instruction, if the context response information contains the ISR deactivation instruction, the SGSN sends RAU receiving information containing the ISR deactivation instruction to the mobile terminal, an RAU updating process is carried out, and the mobile terminal does not activate ISR. Therefore, after the call is finished and the mobile terminal returns to the LTE network, the ISR is not activated, so that the location can be updated, the MSC can reestablish the SGs interface in the location updating process, the MME and the MSC can normally communicate, and the situation that the subsequent paging cannot be sent due to the fact that the ISR is activated, the mobile terminal cannot possibly conduct location updating when returning to the LTE network and cannot reestablish the SGs interface can be avoided.

It should be noted that, in an EPS (Evolved Packet System), in order to reduce air interface signaling between a mobile terminal and a core network (including an MME, an MSC, an SGSN, and the like), an ISR function is introduced. After the ISR function is activated, the mobile terminal having both UTRAN/GERAN and E-UTRAN access functions may be registered with the MME and the SGSN at the same time. Thus, when the mobile terminal moves under two different access networks, the mobile terminal does not initiate RAU or TAU (Tracking Area Update) of the inter RAT (handover between different wireless networks), thereby reducing unnecessary signaling.

In some examples, referring to fig. 2, S13, if the SGs interface state information is in a deleted state, returning context response information carrying an idle signaling optimization ISR deactivation instruction to the SGSN, so that after the SGSN sends RAU accept information including the idle signaling optimization ISR deactivation instruction to the mobile terminal according to the idle signaling deactivation instruction, the method further includes:

and S14, responding to a joint location updating request sent by the mobile terminal when the mobile terminal returns to the LTE network, and sending the location updating request to a Mobile Switching Center (MSC) so that the MSC establishes an SGs interface.

Specifically, based on the CSFB service flow, after the mobile terminal finishes the call, the ue returns to the LTE network, and since the ISR function is not activated, the MME may initiate a joint location update request for the mobile terminal within a TAI List (tracking area List), the MME sends a location update request to the MSC, and the MSC reestablishes the SGs interface after receiving the location update request, so that when the mobile terminal receives a paging request again, the MSC can send the paging request to the MME, which then reaches the mobile terminal.

The joint location update indication message may be a paging request, a paging type parameter may be added to the paging request, and a value of the paging type parameter may be a value representing a location update recovery request type.

Note that, in this step, it is not always necessary for the MME to send the paging request to the mobile terminal on behalf of the mobile terminal being actually called.

In some examples, referring to fig. 3, before receiving the context request information sent by the serving GPRS support node SGSN in response to the mobile terminal triggered routing area update RAU request, S11, the method further includes:

and S01, carrying out joint attachment with the mobile terminal.

Specifically, with continued reference to fig. 3, S01 may include:

s011, receiving the attachment REQUEST sent by the mobile terminal, and sending the SGsAP-LOCATION-UPDATE-REQUEST message to the corresponding visitor LOCATION register VLR. Wherein the VLR is a VLR corresponding to the MSC service.

Specifically, after the mobile terminal is powered on, the joint Attach procedure is started through the 4G multimode card, that is, the mobile terminal sends an Attach Request message to the MME through the 4G multimode card. The parameter Attach Type in the Attach Request indicates that this is a joint EPS (Evolved Packet System) Attach and IMSI (International Mobile Subscriber identity) Attach flow, and indicates that the UE has CS Fallback (Circuit Switched Fallback) capability.

Further, the MME sends a location update request to the HSS, wherein the location update request is added with TAI list allocated by the MME for the 4G multimode card of the UE.

The location update request further includes an MME identifier and an IMSI (International Mobile Subscriber Identity) corresponding to the 4G multimode card of the UE. And after completing the position updating, the HSS establishes and stores the corresponding relation among the IMSI, the MME identification and the TAI list.

The MME sends a location update request message to the VLR. The Location Update request message includes parameters such as a new LAI (Location Area identity), an IMSI of the 4G multimode card, an MME name (MME identifier), and a Location Update Type.

And S012, responding to the confirmation information which is created by the VLR according to the location updating request message and fed back by the SGs interface corresponding to the mobile terminal, and sending an attachment acceptance message to the mobile terminal.

Specifically, after the VLR receives the location update request message, the VLR stores the MME information and creates and establishes an SGs interface association with the IMSI corresponding to the UE under the MME.

The SGs is an interface between the MSC and the MME, and a joint attach function can be implemented through the interface. The MME establishes SGs interface association among the MME, IMSI corresponding to the 4G multimode card and the MSC. Thereafter, the MSC/VLR will perform CS domain location update and send TMSI (Temporary Mobile Subscriber Identity) and LAI corresponding to the 4G multimode card to the MME, so that the MME also establishes SGs interface association.

Further, the VLR initiates a 4G multi-mode card Location update procedure to the HLR (Home Location Register) according to the user information and the Location area information, and then, the VLR returns confirmation information to the MME, and the MME sends an Attach Accept message to the mobile terminal to complete the joint attachment.

In some examples, referring to fig. 4, after performing the joint attachment with the mobile terminal, S01, a paging service flow can be performed, and the method further includes:

s02, receiving the paging request sent by the MSC and forwarding the paging request to the corresponding mobile terminal so that the mobile terminal feeds back the extended service request according to the paging request.

Specifically, after the mobile terminal is successfully attached in a combined manner, when the mobile terminal has an incoming call, the CSFB called service flow is adopted for communication, the MSC sends a paging request to the MME, the MME forwards the paging request to the mobile terminal, and the mobile terminal sends an extended service request to the MME after receiving the paging request.

And S03, receiving the extended service request and sending a cell fallback instruction to the mobile terminal so that the mobile terminal can perform cell fallback.

Specifically, after receiving an extended service request sent by a mobile terminal, an MME sends a cell fallback instruction to the mobile terminal, and after receiving the cell fallback instruction, the mobile terminal performs cell fallback to prepare for establishing a call.

In some examples, with continued reference to fig. 4, after the so3 receives the extended service request and sends a cell fallback instruction to the mobile terminal to cause the mobile terminal to perform cell fallback, the method further includes:

and S04, if the location area number corresponding to the mobile terminal cell fallback is different from the location area number corresponding to the combined attachment, receiving an SGs interface deleting notification sent by the MSC, wherein the SGs interface deleting notification is generated after the MSC responds to a location area update LAU request sent by the mobile terminal to delete the SGs interface.

Specifically, after receiving the extended service request, the MME instructs the mobile terminal to perform cell fallback, and if the LAI of the cell corresponding to the cell fallback performed by the mobile terminal is different from the LAI of the cell corresponding to the cell when performing the joint attachment, the MME needs to perform LAU to update the location area number; and if the LAI of the cell corresponding to the cell falling back of the mobile terminal is the same as the LAI of the cell corresponding to the joint attachment, the LAU is not needed.

If the mobile terminal needs to perform LAU, the mobile terminal sends an LAU request to the MSC, and the MSC responds to the LAU request and deletes the SGs interface. And after deleting the SGs interface, the MSC sends a notice of deleting the SGs interface to the MME.

And S05, setting the SGs interface state information of the mobile terminal to be in a deleted state according to the SGs interface deletion notification.

Specifically, if receiving the SGs interface deletion notification sent by the MSC, the MME sends an interface state setting instruction to set the SGs interface state information of the mobile terminal to the deletion state.

In some examples, the mobile terminal is a mobile terminal with ISR capability, and the ISR management method provided by the present invention is applied to a service flow in which the mobile terminal with ISR capability communicates with a core network. After the mobile terminal is started, whether the mobile terminal has the ISR capability or not can be detected.

In a second aspect, referring to fig. 5, the present invention provides an ISR management method, applied to an SGSN side, including:

and S21, responding to a routing area update RAU request triggered by the mobile terminal to generate context request information carrying SGs interface state information, and sending the context request information to the MME.

Specifically, under the CSFB service flow, the mobile terminal performs RAU while establishing a call, so as to update the routing area location, that is, the mobile terminal sends an RAU request to the SGSN, and adds a mobile terminal identifier to the RAU request. After receiving the RAU request carrying the mobile terminal identifier, the SGSN sends context request information carrying the mobile terminal identifier to the MME, where the mobile terminal identifier includes SGs interface state information.

And S22, receiving context response information fed back by the MME according to the SGs interface state information, wherein if the SGs interface state information is in a deletion state, the context response information carries an ISR (idle state signaling optimization) instruction of inactive idle state signaling.

Specifically, after acquiring the context request information carrying the mobile terminal identifier, the MME extracts the mobile terminal identifier therein, and then determines whether the SGs interface of the mobile terminal is deleted according to the SGs interface information state in the mobile terminal identifier. And if the SGs interface information state is a deletion state, returning context response information carrying an ISR (idle mode signaling reduction) command to the SGSN. And if the SGs interface information state is a deletion state, returning context response information to the SGSN, where the context response information may carry an ISR activating instruction or an ISR deactivating instruction, and is specifically set as required, and is not limited herein. And the SGSN receives the context response information returned by the MME.

And S23, if the context response information carries the ISR deactivation instruction, generating RAU acceptance information carrying the ISR deactivation instruction, and sending the RAU acceptance information to the mobile terminal to indicate the mobile terminal to deactivate the ISR.

Specifically, after receiving context response information returned by the MME, the SGSN determines whether the context response information includes an ISR deactivation instruction, and if the context response information includes the ISR deactivation instruction, the SGSN sends RAU acceptance information including the ISR deactivation instruction to the mobile terminal, performs an RAU update procedure, and deactivates the ISR of the mobile terminal. Therefore, after the call is finished and the mobile terminal returns to the LTE network, the ISR is not activated, so that the location can be updated, the MSC can reestablish the SGs interface in the location updating process, the MME and the MSC can normally communicate, and the situation that the subsequent paging cannot be sent due to the fact that the ISR is activated, the mobile terminal cannot possibly conduct location updating when returning to the LTE network and cannot reestablish the SGs interface can be avoided.

In a third aspect, referring to fig. 6, the present invention provides a mobility management entity MME, including:

a first receiving unit 101, configured to receive context request information sent by a serving GPRS support node SGSN in response to a mobile terminal triggered routing area update RAU request.

An obtaining unit 102, configured to obtain the SGs interface status information included in the context request information.

A first sending unit 103, configured to, if the SGs interface state information is in a deleted state, return context response information carrying an idle signaling optimization ISR deactivation instruction to the SGSN, so that the SGSN sends RAU accept information including the idle signaling optimization ISR deactivation instruction to the mobile terminal according to the idle signaling optimization ISR deactivation instruction.

In a fourth aspect, referring to fig. 7, the present invention provides a receiving serving GPRS support node, SGSN, comprising:

a second sending unit 201, configured to generate context request information carrying SGs interface state information in response to a routing area update RAU request triggered by the mobile terminal, and send the context request information to the MME.

A second receiving unit 202, configured to receive context response information fed back by the MME according to the SGs interface state information, where if the SGs interface state information is in a deletion state, the context response information carries an idle signaling optimization ISR deactivation instruction.

A third sending unit 203, configured to generate RAU acceptance information carrying the ISR deactivation instruction if the context response information carries the ISR deactivation instruction, and send the RAU acceptance information to the mobile terminal, so as to instruct the mobile terminal to deactivate ISR.

In a fifth aspect, the present invention provides an ISR management system, including the MME and/or the SGSN, and may further include a mobile terminal, an MSC, and the like. The MME, the SGSN and the MMSC belong to a core network side, and the mobile terminal can communicate with the core network side through a base station.

A sixth aspect of the present invention provides an electronic apparatus comprising:

at least one processor. And

a memory communicatively coupled to the at least one processor. Wherein the content of the first and second substances,

the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the ISR management method described above.

In the technical scheme of the disclosure, the acquisition, storage, application and the like of the personal information of the related user all accord with the regulations of related laws and regulations, and do not violate the good customs of the public order.

Referring to fig. 8, fig. 8 shows a schematic block diagram of an example electronic device 800 that may be used to implement embodiments of the present disclosure. Electronic devices are intended to represent various forms of digital computers, such as laptops, desktops, workstations, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. The electronic device may also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices, and other similar computing devices. The components shown herein, their connections and relationships, and their functions, are meant to be examples only, and are not meant to limit implementations of the disclosure described and/or claimed herein.

As shown in fig. 8, the apparatus 800 includes a computing unit 801 that can perform various appropriate actions and processes according to a computer program stored in a Read Only Memory (ROM) 802 or a computer program loaded from a storage unit 808 into a Random Access Memory (RAM) 803. In the RAM 803, various programs and data required for the operation of the device 800 can also be stored. The calculation unit 801, the ROM 802, and the RAM 803 are connected to each other by a bus 804. An input/output (I/O) interface 805 is also connected to bus 804.

A number of components in the device 800 are connected to the I/O interface 805, including: an input unit 806, such as a keyboard, a mouse, etc. An output unit 807 such as various types of displays, speakers, and the like. A storage unit 808 such as a magnetic disk, optical disk, or the like. And a communication unit 809 such as a network card, modem, wireless communication transceiver, etc. The communication unit 809 allows the device 800 to exchange information/data with other devices via a computer network such as the internet and/or various telecommunication networks.

Computing unit 801 may be a variety of general and/or special purpose processing components with processing and computing capabilities. Some examples of the computing unit 801 include, but are not limited to, a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), various dedicated Artificial Intelligence (AI) computing chips, various computing units running machine learning model algorithms, a Digital Signal Processor (DSP), and any suitable processor, controller, microcontroller, and the like. The calculation unit 801 executes the respective methods and processes described above, such as the ISR management method. For example, in some embodiments, the ISR management method may be implemented as a computer software program tangibly embodied in a machine-readable medium, such as storage unit 808. In some embodiments, part or all of the computer program can be loaded and/or installed onto device 800 via ROM 802 and/or communications unit 809. When the computer program is loaded into the RAM 803 and executed by the computing unit 801, one or more steps of the ISR management method described above may be performed. Alternatively, in other embodiments, the computing unit 801 may be configured to perform the ISR management method in any other suitable manner (e.g., by means of firmware).

Various implementations of the systems and techniques described here above may be implemented in digital electronic circuitry, integrated circuitry, field Programmable Gate Arrays (FPGAs), application Specific Integrated Circuits (ASICs), application Specific Standard Products (ASSPs), system on a chip (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include: implemented in one or more computer programs that are executable and/or interpretable on a programmable system including at least one programmable processor, which may be special or general purpose, receiving data and instructions from, and transmitting data and instructions to, a storage system, at least one input device, and at least one output device.

Program code for implementing the methods of the present disclosure may be written in any combination of one or more programming languages. These program code may be provided to a processor or controller of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the program code, when executed by the processor or controller, causes the functions/acts specified in the flowchart and/or block diagram to be performed. The program code may execute entirely on the machine, partly on the machine, as a stand-alone software package partly on the machine and partly on a remote machine or entirely on the remote machine or server.

A seventh aspect of the invention provides a non-transitory computer readable storage medium having stored thereon computer instructions for causing a computer to execute the method according to the above.

In the context of this disclosure, a machine-readable medium may be a tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. The machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. A machine-readable medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

To provide for interaction with a user, the systems and techniques described here can be implemented on a computer having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to a user. And a keyboard and a pointing device (e.g., a mouse or a trackball) by which a user may provide input to the computer. Other kinds of devices may also be used to provide for interaction with the user. For example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback). And input from the user may be received in any form, including acoustic, speech, or tactile input.

The systems and techniques described here can be implemented in a computing system that includes a back-end component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front-end component (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such back-end, middleware, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: local Area Networks (LANs), wide Area Networks (WANs), and the Internet.

The computer system may include clients and servers. A client and server are generally remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server may be a cloud server, a server of a distributed system, or a server combining a blockchain.

It should be understood that various forms of the flows shown above may be used, with steps reordered, added, or deleted. For example, the steps described in the present disclosure may be executed in parallel, sequentially, or in different orders, as long as the desired results of the technical solutions disclosed in the present disclosure can be achieved, and the present disclosure is not limited herein.

It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.

Claims

1. An ISR management method, comprising:

and if the SGs interface state information is in a deleted state, returning context response information carrying an idle state signaling optimization ISR (idle state signaling reduction) instruction to the SGSN, so that the SGSN sends RAU (random access unit) acceptance information containing the ISR inactivation instruction to the mobile terminal according to the ISR inactivation instruction.

2. The method according to claim 1, wherein if said SGs interface status information is a delete status, returning context response information carrying an idle-state signaling optimization (ISR) deactivation instruction to said SGSN, so that after said SGSN sends RAU accept information including an ISR deactivation instruction to a mobile terminal according to said ISR deactivation instruction, the method further comprises:

3. The method according to claim 1, wherein before receiving the context request information sent by the serving GPRS support node SGSN in response to the mobile terminal triggered routing area update RAU request, the method further comprises:

and performing joint attachment with the mobile terminal.

4. The method according to claim 3, wherein the jointly attaching with the mobile terminal specifically comprises:

5. The method of claim 3, wherein after the jointly attaching with the mobile terminal, the method further comprises:

6. The method of claim 5, wherein after receiving the extended service request and sending a cell fallback command to the mobile terminal to cause the mobile terminal to perform cell fallback, the method further comprises:

7. The method according to any of claims 1-6, wherein the mobile terminal is an ISR capable mobile terminal.

8. An ISR management method, comprising:

receiving context response information fed back by the MME according to the SGs interface state information, wherein if the SGs interface state information is in a deletion state, an idle state signaling optimization ISR instruction is not activated and carried in the context response information;

9. A Mobility Management Entity (MME), comprising:

10. A receiving serving GPRS support node, SGSN, comprising:

a second receiving unit, configured to receive context response information fed back by the MME according to the SGs interface state information, where if the SGs interface state information is a deletion state, an idle signaling optimization ISR deactivation instruction is carried in the context response information;

11. An ISR management system, comprising the MME of claim 9 and/or the SGSN of claim 10.

12. An electronic device, comprising:

at least one processor; and

the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of any one of claims 1-7 or to perform the method of claim 8.

13. A non-transitory computer readable storage medium having stored thereon computer instructions for causing a computer to perform the method of any one of claims 1-7 or the method of claim 8.