CN113596956A - ISR management method, MME, SGSN and ISR management system - Google Patents

Abstract

The invention discloses an ISR management method, an MME, an SGSN and an ISR management system. The ISR management method includes: receiving 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; acquiring the context request information The SGs interface status information contained in the SGs interface; if the SGs interface status information is in the deleted state, the context response information carrying the inactive idle state signaling optimization ISR instruction is returned to the SGSN, so that the SGSN sends the mobile terminal according to the inactive ISR instruction. The RAU of the instruction accepts the information. Since the mobile terminal is instructed not to activate the ISR, the problem that the SGs interface cannot be rebuilt due to the activation of the ISR can be avoided, thereby causing the problem of unreachable paging.

Description

ISR management method, MME, SGSN and ISR management system

technical field

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

Background technique

A typical CSFB (Circuit Switched Fallback, circuit domain fallback) business process mainly includes joint attach, location update, calling (MO) CSFB process, called (MT) CSFB process, and detachment.

At present, when a mobile terminal with ISR (Idle mode Signaling Reduction, idle state signaling optimization) capability performs some services (such as called services) on the basis of completing the joint attachment, it needs to perform LAU (Location Area Update, location area update), Then the mobile terminal sends the LAU request to the MSC, and the MSC will delete the SGs interface after receiving the LAU request. When a subsequent call is established, the mobile terminal will perform RAU (Route Area Update, routing area update), and in the process of performing the RAU, the ISR of the mobile terminal will be activated. In the call flow based on CSFB, when the mobile terminal ends the call, the mobile terminal needs to return to the LTE (Long Term Evolution, long term evolution) network, and since the mobile terminal activates the ISR, if the TAI (Tracking Area Identity, tracking area identity of the returned cell) Area ID) is in the TAI list (tracking area list) during joint attachment, the mobile terminal does not perform TAU (Tracking Area Update, tracking area update), so the MSC will not perform SGs interface reconstruction. However, because the MSC deletes the SGs interface in the previous process, the MSC and MME cannot communicate with each other. When there is an incoming call, the paging request cannot be sent to the MME through the MSC, so that the paging cannot be delivered to the mobile terminal.

SUMMARY OF THE INVENTION

Therefore, the present invention provides an ISR management method, MME, SGSN and ISR management system to solve the problem that paging cannot be delivered due to the activation of the ISR of the mobile terminal in the call flow of the 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 the context request information sent by the serving GPRS support node SGSN in response to the routing area update RAU request triggered by the mobile terminal;

Obtain the SGs interface status information contained in the context request information;

If the SGs interface state information is in the deleted state, return the context response information carrying the inactive idle state signaling optimization ISR instruction to the SGSN, so that the SGSN sends the message including the inactive ISR instruction to the mobile terminal according to the inactive ISR instruction. The RAU of the instruction accepts the information.

In some examples, if the SGs interface state information is in the deleted state, return the context response information carrying the inactive idle state signaling optimization ISR instruction to the SGSN, so that the SGSN sends the message to the SGSN according to the inactive ISR instruction. After the mobile terminal sends the RAU acceptance information including the inactive ISR instruction, the method further includes:

In response to the joint location update request sent by the mobile terminal when returning to the long-term evolution LTE network, a location update request is sent to the mobile switching center MSC, so that the MSC establishes an SGs interface.

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

Jointly attach with the mobile terminal.

In some examples, the performing joint attachment with the mobile terminal specifically includes:

Receive the attachment request sent by the mobile terminal, and send a location update request message to the corresponding access location register VLR;

In response to the confirmation information created by the VLR according to the location update request message and fed back by the SGs interface corresponding to the mobile terminal, an attach accept message is sent to the mobile terminal.

In some examples, after the joint attachment with the mobile terminal, the method further includes:

receiving a paging request sent by the MSC and forwarding it to a corresponding mobile terminal, so that the mobile terminal feeds back an extended service request according to the paging request;

Receive the extended service request and send a cell fallback instruction to the mobile terminal, so that the mobile terminal performs a cell fallback.

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

If the location area number corresponding to the cell fallback of the mobile terminal is different from the location area number corresponding to the joint attachment, receive a notification of deleting the SGs interface sent by the MSC, where the notification of the deleting the SGs interface is sent by the MSC in response to the mobile terminal. The location area update LAU request is generated after deleting the SGs interface;

The SGs interface state information of the mobile terminal is set to a deletion state according to the deletion of the SGs interface 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, comprising:

In response to the routing area update RAU request triggered by the mobile terminal, the context request information carrying the SGs interface state information is generated, and sent to the MME;

Receive the 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 deleted state, the context response information carries an inactive idle state signaling optimization ISR instruction;

If the context response information carries a deactivation ISR instruction, an RAU acceptance message carrying the deactivation ISR instruction is generated, and sent to the mobile terminal to instruct 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 the context request information sent by the serving GPRS support node SGSN in response to the routing area update RAU request triggered by the mobile terminal;

an acquisition unit, which is used to acquire the SGs interface state information contained in the context request information;

A first sending unit, which is used to return, to the SGSN, the context response information carrying the inactive idle state signaling optimization ISR instruction if the SGs interface state information is in a deleted state, so that the SGSN can make the SGSN inactive according to the inactive ISR instruction. Send the RAU acceptance message containing the instruction to deactivate the ISR to the mobile terminal.

A fourth aspect, the present invention provides a receiving service GPRS support node SGSN, comprising:

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

The second receiving unit is configured to receive the context response information fed back by the MME according to the SGs interface state information, wherein, if the SGs interface state information is in the deleted state, the context response information carries the inactive idle state Signaling optimization ISR instructions;

The third sending unit is configured to generate, if the context response information carries a deactivation ISR instruction, generate RAU acceptance information carrying the deactivation ISR instruction, and send it to the mobile terminal to instruct the mobile terminal to deactivate the ISR.

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

In a sixth aspect, an electronic device of the present invention includes:

at least one processor; and

a memory communicatively coupled to the at least one processor; wherein,

The memory stores instructions executable by the at least one processor, the instructions being executed 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 storing computer instructions, wherein the computer instructions are used to cause the computer to perform the method according to the above.

The present invention has the following advantages:

In the ISR management method provided by the embodiments of the present invention, in the CSFB-based service process, after the mobile terminal completes the joint attachment, when performing some services, such as the called service, LAU needs to be performed, and the MSC will connect the SGs interface in the LAU process. delete. When the mobile terminal establishes a subsequent call, it will perform RAU. Because in the ISR management method provided by the present invention, the SGSN sends the context request information to the MME after receiving the RAU request of the mobile terminal, which includes the SGs interface status information of the terminal. The SGs interface status information generates the context response information and feeds it back to the SGSN. If the SGs interface status information is in the deleted state, the MME carries the deactivation ISR command in the context response information, so that the SGSN sends the RAU acceptance information carrying the deactivation ISR command to the mobile terminal. , indicating that the mobile terminal does not activate the ISR. Therefore, after the call ends, when the mobile terminal returns to the LTE network, since the ISR is not activated, the location update will be performed. During the location update, the MSC will rebuild the SGs interface, which can prevent the mobile terminal from returning to the LTE network due to the activation of the ISR. The location update will be performed, but the SGs interface cannot be rebuilt, resulting in the situation that subsequent paging cannot be delivered.

Description of drawings

The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the specification, and together with the following specific embodiments, are used to explain the present invention, but do not constitute a limitation to the present invention.

1 is one of the schematic flowcharts of an ISR management method provided by an embodiment of the present invention;

2 is a second schematic flowchart of an ISR management method provided by an embodiment of the present invention;

3 is a third schematic flowchart of an ISR management method provided by an embodiment of the present invention;

4 is a fourth schematic flowchart of an ISR management method provided by an embodiment of the present invention;

5 is a schematic flowchart of an ISR management method provided by another embodiment of the present invention;

6 is a schematic structural diagram of an MME provided by an embodiment of the present invention;

7 is a schematic structural diagram of an SGSN provided by 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 ways

The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, but not to limit the present invention.

The ISR management method provided by the embodiment of the present invention can be applied to an ISR management system including a mobile terminal, MME, SGSN, and MSC. The system may include MSC (Mobile Switching Center, mobile switching center), MME (Mobility Management Entity, mobility management entity), SGSN (Serving GPRS Support Node, 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 the CDMA cellular mobile communication system, it controls the lifeblood of the system, and connects with other systems (such as fixed telephone network, GSM network, etc.) through the CDMA system. At the same time, it also controls the working state of the base station and the mobile station, realizes the interconnection of mobile users, and various soft handovers and hard handovers of the mobile station. All base stations have lines connected to the MSC, including service lines and control lines. The MSC feeds the signals obtained from one or several base stations to the selectors and corresponding vocoders. MME is the storage location of user subscription data in the current network, and is responsible for the 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, and the tracking and paging management in the user idle mode. Functionality and bearer management. The SGSN is the service support point for GERAN and UTRAN users to access the core network. It is similar in function to the MME and is responsible for the user's location update, paging management, and bearer management.

In addition, the method provided by the embodiment of the present invention is based on the LTE (Long Term Evolution) standard of the 3GPP (3rd Generation Partnership Project, 3rd Generation Partnership Project) standard, a communication technology that provides voice services on a CSFB (Circuit Switched Fallback, circuit domain fallback) network. , Long Term Evolution) voice business process. When the UE under the LTE coverage processes the voice service, the terminal first falls back to the CS (Circuit Switched Domain, circuit domain) network, and processes the voice service on the CS network, so that the existing equipment in the CS domain can be reused for the LTE network. The purpose of providing traditional voice services to users. The prerequisite for CSFB use is: only in the overlapping coverage area of E-UTRAN (UMTS Terrestrial Radio Access Network, UMTS Terrestrial Radio Access Network) and UTRAN/GERAN (GSMEDGE Radio Access Network, GSM/EDGE Radio Access Network), and the user has The circuit domain fallback can only be used when the CSFB function is enabled. The mobile terminal first performs joint attachment on the EPC (Evolved Packet Core, Evolved Packet Core) through the LTE network, and notifies the MSC on the switching side through the MME of the EPC. The terminal falls back to GSM (Global System for Mobile Communication, Global System for Mobile Communication) to establish a voice with the MSC, and after the call ends, the mobile terminal returns to the LTE network.

In the related art, a mobile terminal with ISR (Idle mode Signaling Reduction, idle state signaling optimization) capability first performs joint attachment. After the joint attachment is completed, the ISR is not activated at this time. When there is an incoming call, the MSC (Mobile Switching Center, Mobile Switching Center) The center) sends the paging request to the MME (Mobile Management Entity), the MME sends the paging request to the mobile terminal, the mobile terminal sends the 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 to the cell, if the LAI (Location Area Identify, location area code) of the falling back cell is different from the LAI during joint attachment, it needs to perform LAU (Location Area Update, location area update) first, and the MSC deletes the SGs after receiving the LAU request. interface. Then the mobile terminal performs RAU (Route Area Update, routing area update) while establishing the call, the mobile terminal sends a RAU request to the SGSN (ServingGSN, serving GPRS support node), and the SGSN sends a context request message to the MME after receiving the RAU request. After receiving the context response information fed back by the MME, the SGSN sends RAU acceptance information to the mobile terminal, and the RAU acceptance information includes an ISR activation indication, so that the mobile terminal activates the ISR. In the call flow based on CSFB, when the mobile terminal ends the call, the mobile terminal needs to return to the LTE (Long Term Evolution, long term evolution) network, and since the mobile terminal activates the ISR, if the TAI (Tracking Area Identity, tracking area identity of the returned cell) Area ID) is in the tracking area list TAI list at the time of joint attachment, then the mobile terminal does not perform TAU, so that the SGs interface will not be rebuilt. However, because the MSC deletes the SGs interface, the MSC and MME cannot communicate with each other. When there is an incoming call, the paging request cannot be sent to the MME through the MSC, resulting in failure to deliver the paging.

In order to solve the above problems, in the first aspect, referring to FIG. 1 , the present invention provides an ISR management method, which is applied on the MME side, and the method includes:

S11: Receive the context request information sent by the serving GPRS support node SGSN in response to the routing area update RAU request triggered by the mobile terminal.

Specifically, under the CSFB-based business process, the mobile terminal needs to perform RAU when establishing a call to update the location of the routing area, that is, the mobile terminal sends a 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 the context request information carrying the mobile terminal identifier to the MME, wherein the mobile terminal identifier includes the SGs interface state information.

S12: Acquire the SGs interface state information contained in the context request information.

Specifically, the SGs interface information state includes a setup state and a deletion state, the setup state indicates that the SGs interface can communicate normally, and the deletion state indicates that the SGs interface has been deleted.

After the MME acquires the context request information carrying the mobile terminal identifier, it extracts the mobile terminal identifier in it, and then judges whether the SGs interface of the mobile terminal is deleted through the state of the SGs interface information in the mobile terminal identifier.

S13. If the SGs interface state information is in the deleted state, return the context response information carrying the inactive idle state signaling optimization ISR instruction to the SGSN, so that the SGSN sends the RAU acceptance information including the inactive ISR instruction to the mobile terminal according to the inactive ISR instruction.

Specifically, if the SGs interface state information is in the established state, the MME returns context response information to the SGSN, which may include an ISR activation command or a deactivation ISR command, depending on the requirements. However, if the interface state information is in the deleted state, the MME returns to the SGSN the context response information carrying the instruction to deactivate the idle state signaling optimization ISR. After the SGSN receives the context response information returned by the MME, it determines whether the context response information contains the deactivation ISR command. If the context response information contains the deactivation ISR command, the SGSN sends the RAU acceptance message containing the deactivation ISR command to the mobile terminal. The RAU update procedure is performed, and the ISR is deactivated by the mobile terminal. Therefore, after the call ends, when the mobile terminal returns to the LTE network, since the ISR is not activated, the location update will be performed. During the location update, the MSC will rebuild the SGs interface so that the MME and the MSC can communicate normally. When the terminal returns to the LTE network, the location update may not be performed, and the SGs interface cannot be rebuilt, resulting in the situation that subsequent paging cannot be delivered.

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

In some examples, referring to FIG. 2, S13, if the SGs interface state information is in the deleted state, return the context response information carrying the inactive idle state signaling optimization ISR instruction to the SGSN, so that the SGSN sends the mobile terminal according to the inactive ISR instruction. After the RAU that does not activate the ISR instruction accepts the information, the method further includes:

S14. In response to the joint location update request sent by the mobile terminal when returning to the LTE network, send a location update request to the mobile switching center MSC, so that the MSC establishes an SGs interface.

Specifically, based on the business process of CSFB, after the mobile terminal call ends, it will return to the LTE network. Since the ISR function is not activated, the location update will be performed. The MME can make the mobile terminal within the TAI List (tracking area list) range to initiate In conjunction with the location update request, the MME sends the location update request to the MSC. After receiving the location update request, the MSC will rebuild the SGs interface, so that when the mobile terminal receives the paging request again, the MSC can send the paging request to the MME, and then the MSC can send the paging request to the MME. The MME is delivered to 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 the value of the paging type parameter may be a value representing the location update recovery request type.

It should be noted that, in this step, the MME sending the paging request to the mobile terminal does not necessarily mean that the mobile terminal is actually called.

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

S01. Perform joint attachment with a mobile terminal.

Specifically, continue to refer to FIG. 3, S01 may include:

S011. Receive the attach request sent by the mobile terminal, and send an SGsAP-LOCATION-UPDATE-REQUEST (location update request message) to the corresponding visitor location register VLR. Wherein, the VLR is the VLR corresponding to the MSC service.

Specifically, after the mobile terminal is powered on, the joint attach process is started through the 4G multi-mode card, that is, the mobile terminal sends an Attach Request (attach request) message to the MME through the 4G multi-mode card. Among them, the parameter AttachType (attach type) in the Attach Request indicates that this is a joint EPS (Evolved Packet System, Evolved Packet System) attach and IMSI (International Mobile Subscriber Identification Number, International Mobile Subscriber Identification Number) attach process, and represents the UE With CS Fallback (Circuit Switched Fallback, circuit domain fallback) capability.

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

The location update request further includes the MME identifier and the IMSI (International Mobile Subscriber Identity, International Mobile Subscriber Identity) corresponding to the 4G multimode card of the UE. After the HSS completes the location update, it establishes and stores the corresponding relationship among the IMSI, the MME identifier, and the TAI list.

The MME sends a location update request message to the VLR. The location update request message includes parameters such as new LAI (Location Area Identify, location area identification code), IMSI of the 4G multi-mode card, MME name (MME identifier), and Location Update Type (location update type).

S012. In response to the confirmation information created by the VLR according to the location update request message and fed back by the SGs interface corresponding to the mobile terminal, send an attach accept message to the mobile terminal.

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

Among them, the SGs is the interface between the MSC and the MME, through which the joint attachment function can be implemented. What the MME creates is the SGs interface association between the MME, the IMSI corresponding to the 4G multimode card, and the MSC. Thereafter, the MSC/VLR will update the CS domain location, and send the TMSI (Temporary Mobile Subscriber Identity, Temporary Mobile Subscriber Identity, Temporary Mobile Subscriber Identity) and LAI corresponding to the 4G multimode card to the MME, so that the MME also establishes the SGs interface association.

Further, according to the user information and the location area information, the VLR initiates the 4G multi-mode card location update process to the HLR (Home LocationRegister, home location register). After that, the VLR returns the confirmation information to the MME, and the MME sends the Attach Accept() to the mobile terminal. Attach Accept) message to complete the joint attachment.

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

S02: Receive a paging request sent by the MSC and forward it to a corresponding mobile terminal, so that the mobile terminal feeds back an extended service request according to the paging request.

Specifically, after the joint attachment of the mobile terminal is successful, when the mobile terminal has an incoming call, the called service process of CSFB is used to communicate, the MSC sends a paging request to the MME, the MME forwards the paging request to the mobile terminal, and the mobile terminal receives the call. After the paging request, an extended service request will be sent to the MME.

S03. Receive the extended service request and send a cell fallback instruction to the mobile terminal, so that the mobile terminal performs cell fallback.

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

In some examples, continuing to refer to FIG. 4 , after S03, receiving an extended service request and sending a cell fallback instruction to the mobile terminal, so that the mobile terminal performs cell fallback, the method further includes:

S04, if the location area number corresponding to the mobile terminal's cell fallback is different from the location area number corresponding to the joint attachment, receive a notification of deleting the SGs interface sent by the MSC, wherein the notification of the interface to delete the SGs is that the MSC responds to the location area update LAU sent by the mobile terminal to request to delete the SGs generated after the interface.

Specifically, after receiving the extended service request, the MME instructs the mobile terminal to perform cell fallback. If the LAI of the cell corresponding to the mobile terminal performing cell fallback is different from the LAI of the cell corresponding to the joint attachment, LAU needs to be performed to update the location area code; If the LAI of the cell corresponding to the cell fallback performed by the mobile terminal is the same as the LAI of the corresponding cell when the mobile terminal performs joint attachment, LAU is not required.

If the mobile terminal wants to perform LAU, the mobile terminal sends a LAU request to the MSC, and the MSC deletes the SGs interface in response to the LAU request. After the MSC deletes the SGs interface, it sends a notification of deleting the SGs interface to the MME.

S05. Set the SGs interface state information of the mobile terminal to a deleted state according to the notification of deleting the SGs interface.

Specifically, if the MME receives the notification of deleting the SGs interface sent by the MSC, it sends an interface state setting instruction to set the SGs interface state information of the mobile terminal to the deleted 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 in the business process in which the mobile terminal with ISR capability communicates with the core network. After the mobile terminal is powered on, it can be detected whether the mobile terminal has the ISR capability.

In the second aspect, referring to FIG. 5 , the present invention provides an ISR management method, which is applied on the SGSN side, and the method includes:

S21. In response to the routing area update RAU request triggered by the mobile terminal, the context request information carrying the SGs interface state information is generated, and sent to the MME.

Specifically, under the CSFB-based business process, the mobile terminal needs to perform RAU when establishing a call to update the location of the routing area, that is, the mobile terminal sends a 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 the context request information carrying the mobile terminal identifier to the MME, wherein the mobile terminal identifier includes the SGs interface state information.

S22: Receive the 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 deleted state, the context response information carries an instruction to deactivate the idle state signaling optimization ISR.

Specifically, after acquiring the context request information carrying the mobile terminal identification, the MME extracts the mobile terminal identification therein, and then judges whether the SGs interface of the mobile terminal is deleted through the state of the SGs interface information in the mobile terminal identification. If the state of the SGs interface information is in the deleted state, the context response information carrying the instruction to deactivate the ISR is returned to the SGSN. If the state of the SGs interface information is in the deleted state, the context response information is returned to the SGSN. The context response information can carry an ISR activation command or a deactivation ISR command, which is specifically set as required, which is not limited here. The SGSN receives the context response information returned by the MME.

S23. If the context response information carries a deactivation ISR instruction, generate RAU acceptance information carrying the deactivation ISR instruction, and send it to the mobile terminal to instruct the mobile terminal not to activate the ISR.

Specifically, after receiving the context response information returned by the MME, the SGSN determines whether the context response information contains a deactivation ISR instruction. If the context response information contains a deactivation ISR instruction, the SGSN sends a RAU containing the deactivation ISR instruction to the mobile terminal. The information is accepted, the RAU update procedure is performed, and the ISR is deactivated by the mobile terminal. Therefore, after the call ends, when the mobile terminal returns to the LTE network, since the ISR is not activated, the location update will be performed. During the location update, the MSC will rebuild the SGs interface so that the MME and the MSC can communicate normally. When the terminal returns to the LTE network, the location update may not be performed, and the SGs interface cannot be rebuilt, resulting in the situation that subsequent paging cannot be delivered.

In a third aspect, referring to FIG. 6 , the present invention provides a mobility management entity MME, which includes:

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

The obtaining unit 102 is configured to obtain the SGs interface state information included in the context request information.

The first sending unit 103, which is used to return the context response information carrying the inactive idle state signaling optimization ISR instruction to the SGSN if the SGs interface state information is in a deleted state, so that the SGSN sends a message containing an inactive ISR instruction to the mobile terminal according to the inactive ISR instruction. The RAU of the ISR instruction accepts the information.

The fourth aspect, referring to Fig. 7, the present invention provides a receiving service GPRS support node SGSN, the SGSN includes:

The second sending unit 201 is 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 information to the MME.

The second receiving unit 202 is configured to receive the 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 deleted state, the context response information carries an instruction to deactivate the idle state signaling optimization ISR.

The third sending unit 203 is configured to generate, if the context response information carries a deactivation ISR instruction, generate RAU acceptance information carrying the deactivation ISR instruction, and send it to the mobile terminal to instruct the mobile terminal to deactivate the ISR.

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

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

at least one processor. as well as

A memory communicatively coupled with the at least one processor. in,

The memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to execute the above-described ISR management method.

In the technical solution of the present disclosure, the acquisition, storage and application of the user's personal information involved are all in compliance with the provisions of relevant laws and regulations, and do not violate public order and good customs.

Referring to Figure 8, Figure 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, mainframe computers, and other suitable computers. Electronic devices may also represent various forms of mobile devices, such as personal digital processors, cellular phones, smart phones, wearable devices, and other similar computing devices. The components shown herein, their connections and relationships, and their functions are by way of example only, and are not intended to limit implementations of the disclosure described and/or claimed herein.

As shown in FIG. 8 , the device 800 includes a computing unit 801 that can be executed 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 Various appropriate actions and handling. In the RAM 803, various programs and data necessary for the operation of the device 800 can also be stored. The computing unit 801 , the ROM 802 , and the RAM 803 are connected to each other through a bus 804 . An input/output (I/O) interface 805 is also connected to bus 804 .

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

Computing unit 801 may be various general-purpose and/or special-purpose processing components with processing and computing capabilities. Some examples of computing units 801 include, but are not limited to, central processing units (CPUs), graphics processing units (GPUs), various specialized artificial intelligence (AI) computing chips, various computing units that run machine learning model algorithms, digital signal processing processor (DSP), and any suitable processor, controller, microcontroller, etc. The computing unit 801 performs the various 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 on a machine-readable medium, such as storage unit 808 . In some embodiments, part or all of the computer program may be loaded and/or installed on device 800 via ROM 802 and/or communication unit 809 . When the computer program is loaded into RAM 803 and executed by 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 by any other suitable means (eg, by means of firmware).

Various implementations of the systems and techniques described herein above may be implemented in digital electronic circuitry, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips system (SOC), load programmable logic device (CPLD), computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include being implemented in one or more computer programs executable and/or interpretable on a programmable system including at least one programmable processor that The processor, which may be a special purpose or general-purpose programmable processor, may receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device an 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 codes 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, performs the functions/functions specified in the flowcharts and/or block diagrams. Action is implemented. The program code may execute entirely on the machine, partly on the machine, partly on the machine and partly on a remote machine as a stand-alone software package or entirely on the remote machine or server.

A seventh aspect of the present invention provides a non-transitory computer-readable storage medium storing computer instructions, wherein the computer instructions are used to cause a computer to perform the method according to the above.

In the context of the present disclosure, a machine-readable medium may be a tangible medium that may contain or store a program for use by or in connection with the instruction execution system, apparatus or device. The machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. Machine-readable media may include, but are not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or devices, or any suitable combination of the foregoing. More specific examples of machine-readable storage media would include one or more wire-based electrical connections, portable computer disks, hard disks, random access memory (RAM), read only memory (ROM), erasable programmable read only memory (EPROM or flash memory), fiber optics, compact disk read only memory (CD-ROM), optical storage, magnetic storage, or any suitable combination of the foregoing.

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

The systems and techniques described herein may be implemented on a computing system that includes back-end components (eg, as a data server), or a computing system that includes middleware components (eg, an application server), or a computing system that includes front-end components (eg, a user's computer having a graphical user interface or web browser through which a user may interact with implementations of the systems and techniques described herein), or including such backend components, middleware components, Or any combination of front-end components in a computing system. The components of the system may be interconnected by any form or medium of digital data communication (eg, a communication network). Examples of communication networks include: Local Area Networks (LANs), Wide Area Networks (WANs), and the Internet.

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

It should be understood that steps may be reordered, added or deleted using the various forms of flow shown above. For example, the steps described in the present disclosure can 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, there is no limitation herein.

In the ISR management method provided by the embodiments of the present invention, in the CSFB-based service process, after the mobile terminal completes the joint attachment, when performing some services, such as the called service, LAU needs to be performed, and the MSC will connect the SGs interface in the LAU process. delete. When the mobile terminal establishes a subsequent call, it will perform RAU. Because in the ISR management method provided by the present invention, the SGSN sends the context request information to the MME after receiving the RAU request of the mobile terminal, which includes the SGs interface status information of the terminal. The SGs interface status information generates the context response information and feeds it back to the SGSN. If the SGs interface status information is in the deleted state, the MME carries the deactivation ISR command in the context response information, so that the SGSN sends the RAU acceptance information carrying the deactivation ISR command to the mobile terminal. , indicating that the mobile terminal does not activate the ISR. Therefore, after the call ends, when the mobile terminal returns to the LTE network, since the ISR is not activated, the location update will be performed. During the location update, the MSC will rebuild the SGs interface, which can prevent the mobile terminal from returning to the LTE network due to the activation of the ISR. The location update will be performed, but the SGs interface cannot be rebuilt, resulting in the situation that subsequent paging cannot be delivered.

It can be understood that the above embodiments are only exemplary embodiments adopted to illustrate the principle of the present invention, but the present invention is not limited thereto. For those skilled in the art, without departing from the spirit and essence of the present invention, various modifications and improvements can be made, and these modifications and improvements are also regarded as the protection scope of the present invention.

Claims (13)

1. An ISR management method, comprising:

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) 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:

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.

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:

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.

5. The method of claim 3, wherein 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.

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

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.

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:

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 in a deletion state, an idle state signaling optimization ISR instruction is not activated and 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.

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

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.

10. 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.

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

a memory communicatively coupled to the at least one processor; wherein,

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.

Images