WO2013056423A1

WO2013056423A1 - Method and device for deactivating idle saving signalling in circuit-switched fallback scenario

Info

Publication number: WO2013056423A1
Application number: PCT/CN2011/080937
Authority: WO
Inventors: 陈中平; 于益俊
Original assignee: 华为技术有限公司
Priority date: 2011-10-18
Filing date: 2011-10-18
Publication date: 2013-04-25
Also published as: CN103348715A; CN103348715B

Abstract

Provided is a method for processing an idle saving signalling in a circuit-switched fallback (CSFB) scenario. The method includes: user equipment (UE) receiving a first location area update accept message sent by a mobility management entity (MME); receiving a second location area update accept message sent by a serving GPRS support node (SGSN) or a mobile switching centre (MSC); and determining that an SGs association created by the MME and the MSC has been released, and performing an operation of deactivating ISR or an operation of maintaining the ISR deactivation state. Accordingly, also provided is UE. The problem that the paging cannot be reached if there is no SGs association established when the UE returns to the E-UTRAN is solved, improving the deployment effects of the ISR and the service reliability.

Description

Method and device for activating circuit state saving signaling by circuit switching falling back scene

The embodiments of the present invention relate to the field of communications technologies, and in particular, to a method and apparatus for deactivating idle state saving signaling in a circuit switched fallback scenario.

Background technique

The existing mobile communication network includes a radio access network (Radio Access Network, hereinafter referred to as RAN) and a core network (Core Network, CN). The radio access network includes a UMTS Territorial Radio Access Network (UTRAN), a GSM EDGE Radio Access Network (GERAN), and an evolved UMTS Territorial Radio (Evolved UMTS Territorial Radio). Access Network). The core network includes a Mobility Management Entity (MME), a Serving GPRS Support Node (SGSN), and a Mobile Switch Center (MSC). The CN can be logically divided into a Circuit Switched (CS) domain and a Packet Switched (PS) domain. The MSC is an entity in the CS domain, and the SGSN and MME are entities in the PS domain. The SGSN is associated with the MSC through the Gs interface, and the MME and the MSC are associated through the SGs interface. For MSC, only one of the Gs associations and SGs associations can be created. Once a new association is created, the previous association needs to be released.

When the UE in the idle mode changes the access system, the corresponding mobility management process needs to be performed. The UE accesses the E-UTRAN from GERAN/UTRAN, and the UE initiates a Tracking Area Update (TAU) process, which may be a separate TAU process or a joint tracking area/bit. Combined TA/LA Updating Procedure; Accessing GERAN/UTRAN from E-UTRAN, the UE initiates a Routing Area Update (RAU) process, which can be a separate RAU process or a joint route. Combined RA/LA Updating Procedure.

Since the E-UTRAN network belongs to the PS domain, if the UE receives the CS paging message in the E-UTRAN network, the GERAN/UTRAN is returned from the E-UTRAN network to perform the CS service, which needs to be between the MME and the MSC. Establish an SGs association for the UE. The architecture and processing method for performing CS services based on SGs association is called CS fallback (CSFB) or SGs-based short message (SMS over SGs).

Idle mode signaling reduction (ISR) can be introduced to solve the problem of a large number of mobility management processes caused by UEs in idle mode switching between GERAN/UTRAN and E-UTRAN. Features. The ISR is selected by the SGSN or the MME to activate and notify the UE in the RAU procedure or TAU procedure initiated by the UE. Once the ISR is activated, the UE moves in the registered RA area and the registered TA area, and the RAU or TAU process does not occur because the access system changes, which saves signaling.

In the scenario of ISR activation, the UE needs to set the temporary identity used in next update (TIN) to "RAT-related TMSI". The TIN is a parameter of the UE context, and is used to determine the UE identification information that needs to be carried in the update process message initiated by the next UE. The value of the TIN can be: Globally Unique Temporary Identity (GUTI) or IPacket Temporary Mobile Subscriber Identity (P-TMSI) or i|m mobile subscriber related to wireless access technology. i only the identity of the subject (only radio acess technology-related Temporary Mobile Subscriber Identity, RAT-related TMSI ). For the UE, the TIN can be used to determine the status of the ISR. The TIN is set to RAT-related TMSI, which can be used to indicate that the UE is in the ISR activation state; otherwise, the TIN is set to GUTI or P-TMSI, which can be used to indicate that the UE is in the deactivated state.

In the prior art, the UE sends an RAU update procedure, and receives an update procedure acknowledgment message sent by the SGSN, where the message carries an indication that the ISR is not activated or deactivated, and the UE does not activate the ISR or deactivate the ISR according to the ISR indication. Deactivation is the activation before the release of the ISR.

In addition, when the UE sends a separate LAU update procedure in the GERAN/UTRAN network, the network side will release the previously established Gs association or SGs association.

In the prior art, the UE performs the deactivation operation only according to the indication sent by the network side; if the UE initiates the RAU procedure when the E-UTRAN switches to the GERAN/UTRAN, the SGs association is released; if the ISR is activated when the E-UTRAN is returned The UE itself cannot determine the deactivation, and will not initiate the TAU process or the joint TAU/LAU process, and the released SGs association will not be re-established. Then, once the UE is paged in GERAN/UTRAN, the paging is unreachable and the service is unreliable because the SGs association is not established.

Summary of the invention

The embodiment of the invention provides a method and a device for processing an ISR in a CSFB scenario, which are used to solve the problem that when the UE returns to the E-UTRAN, the SGs association cannot be established due to the ISR activation, which causes the paging unreachable.

An embodiment of the present invention provides an ISR processing method for idle state saving signaling in a circuit switched back-off CSFB scenario, including: Receiving, by the user equipment UE, a first location area update accept message sent by the mobility management entity MME;

Receiving service GPRS support node SGSN or mobile switching center MSC sends a second location update request message;

Determining that the association between the MME and the SGs created by the MSC is released, and performing an deactivated ISR operation.

An embodiment of the present invention further provides a user equipment UE, including:

a receiving unit, configured to receive a first location area update accept message sent by the mobility management entity MME, and a second location area update accept message sent by the serving GPRS support node SGSN or the mobile switching center MSC;

The determining unit is configured to determine that the association between the MME and the SGs created by the MSC is released, and the processing unit is configured to perform a deactivated ISR operation.

According to the method and the user equipment provided by the embodiment of the present invention, the UE determines that the SGs association is released according to the receiving message sent by the network side to perform the deactivation of the ISR. The deployment effect of the ISR is improved. When the UE returns to the E-UTRAN, the ISR is deactivated, and the SGs association can be reconstructed, so that the UE located in the E-UTRAN can be successfully paged, thereby improving the reliability of the service.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are used in the description of the claims Other drawings may also be obtained from these drawings without the use of creative labor. 1 is a flowchart of a method according to Embodiment 1 of the present invention;

2 is a flowchart of a method according to Embodiment 2 of the present invention;

3 is a flowchart of a method according to Embodiment 3 of the present invention;

4 is a structural block diagram of a UE according to Embodiment 4 of the present invention.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is a partial embodiment of the invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without departing from the inventive work are all within the scope of the present invention.

Embodiment 1 of the present invention:

1 is a flowchart of a method for processing an ISR in a CSFB scenario according to the present invention. As shown in FIG. 1, the method includes:

5101. Receive a first location area update accept message sent by the MME.

It should be noted that the first location area update accept message may be a joint TAU/LAU accept message sent by the MME.

5102. Receive a second location area update accept message sent by the SGSN or the MSC.

The second location area update accept message is a joint RAU/LAU accept message carried by the SGSN carrying an activation indication, or an LAU accept message sent by the MSC.

5103. Determine that the association between the MME and the SGs created by the MSC is released, and perform an deactivated ISR operation.

The UE determines that the ISR has been activated, and determines an MME according to the first location area update accept message. The MSC has created an SGs association; according to the second location area update accept message, it is determined that the association between the MME and the SGs created by the MSC is released, and a deactivation operation is performed, which may be to set the temporary update identifier TIN to P-TMSI.

In this embodiment, the UE confirms that the created SGs association has been released according to the received first location area update accept message and the second location area update accept message, and then performs deactivation of the ISR or maintains the inactive ISR operation, ensuring that the UE is When the E-URTAN is returned, the SGs association can be re-established so that the paging initiated at the GERAN/URTAN can successfully reach the UE located in the E-UTRAN. Improve the deployment effect and service reliability of ISR.

Embodiment 2 of the present invention:

In the CSFB scenario, a process of processing the ISR operation on the UE side is as follows:

5201. In the E-UTRAN, the UE sends a joint TAU/LAU procedure to the network side. In the update procedure, the UE sends a joint TAU/LAU request message to the MME, and the MME sends an update location request message to the MSC after receiving the MSC. After receiving the request message, an update location confirmation message is returned to the MME. Finally, the MME and the MSC create an SGs association for the UE.

5202. The MME sends a joint TAU/LAU accept message to the UE, and the UE records that the SGs association is successfully created.

It should be noted that the UE receives the joint TAU/LAU accept message, determines that the MME has established an SGs association with the MSC, and performs a local operation to record the successful creation of the SGs association, including but not limited to: setting the SGs association status identifier to "SGs". -Associated".

5203. The UE sends a joint RAU/LAU process to the network side.

It should be noted that the UE moves from the E-UTRAN network to the GERAN/UTRAN, and sends a joint RAU/LAU request message to the SGSN, and the SGSN sends an update location request to the SGSN. The MSC, the MSC returns an update location confirmation message to the SGSN. The MSC establishes a Gs association with the SGSN and the MSC releases the previously established SGs association.

5204. The SGSN sends a joint RAU/LAU accept message to the UE, where the message carries an ISR activation indication.

5205. The UE confirms that the SGs association created in the E-UTRAN has been released, and then performs deactivation of the ISR or maintains the inactive ISR operation.

After receiving the joint RAU/LAU accept message, the UE performs the deactivated ISR or according to the received joint TAU/LAU accept message and the joint RAU/LAU accept message, confirming that the created SGs association has been released. The inactive ISR operation is maintained, including but not limited to: Set the TIN to "P-TMSI". It should be noted that if the previous ISR is not activated, the ISR operation is not activated.

In this embodiment, the UE confirms that the created SGs association has been released according to the received joint TAU/LAU accept message and the joint RAU/LAU accept message, and then performs deactivation of the ISR or maintains the inactive ISR operation, ensuring that the UE returns to the E. - URTAN may re-establish SGs association so that the paging initiated at GERAN/URTAN can successfully reach the UE located in E-UTRAN. Improve the deployment of ISR and the reliability of the business.

Embodiment 3 of the present invention:

S301-S302 are the same as S201-S202 of the second embodiment;

S303. The UE sends a separate RAU request message to the SGSN.

The UE transmits a RAU request message to the SGSN when moving from the E-UTRAN to the GERAN/UTRAN.

S304. The SGSN sends an RAU accept message to the UE, where the message carries an ISR activation indication. 5305. The UE sends a separate LAU procedure to the MSC;

In this flow, the UE sends a LAU Request message to the MSC. After receiving the MSC, it is associated with the SGs created by the MME before release.

5306. The MSC returns a LAU accept message to the UE;

5307. The UE confirms that the SGs association created on the E-UTRAN network has been released, then deactivates

ISR.

After receiving the RAU accept message, the UE, according to the received joint TAU/LAU accept message and the LAU accept message, confirms that the created SGs association has been released, and then performs deactivation of the ISR or maintains the inactive ISR operation. This includes but is not limited to: Set the TIN to "P-TMSI". It should be noted that if the previous ISR is not activated, the inactive ISR operation is maintained.

In this embodiment, according to the received joint TAU/LAU accept message and the RAU and LAU accept message, the UE confirms that the SGs association has been released, and then deactivates the ISR, ensuring that the SGs association can be re-established when the UE returns to the E-UTRAN. The paging initiated by the GERAN/UTRAN can successfully reach the UE. Improve the deployment of ISR and the reliability of the business.

Embodiment 4 of the present invention:

An embodiment of the present invention provides a UE for activating an ISR in a CSFB scenario, as shown in FIG. 4, including:

The receiving unit 401 is configured to receive a first location area update accept message sent by the MME, and a second location area update accept message sent by the SGSN or the MSC;

It should be noted that the first location area update accept message is a joint TAU/LAU accept message sent by the MME. The second location area update accept message is a joint RAU/LAU accept message carrying an activation indication sent by the SGSN, or an LAU accept message sent by the MSC.

The determining unit 402 is configured to determine that the association between the MME and the SGs created by the MSC is released;

The UE determines that the ISR has been activated, and determines that the MME and the MSC have created an SGs association according to the first location area update accept message received by the receiving unit 401; and determines that the MME and the MSC are created according to the second location area update accept message received by the receiving unit 401. The SGs association was released.

The processing unit 403 is configured to perform a deactivated ISR operation or maintain an ISR inactive state operation.

When the judging unit 402 judges that the SGs association of the MME and the MSC has been released, the processing unit 403 performs a deactivation ISR operation or maintains an ISR inactive state operation.

The UE, according to the received first location area update accept message and the second location area update accept message, confirms that the created SGs association has been released, performs deactivation of the ISR or maintains the inactive ISR operation, ensuring that when the UE returns to the E-URTAN The SGs association can be re-established so that the paging initiated at GERAN/URTAN can successfully reach the UE. Improve the deployment of ISR and the reliability of the business.

A person skilled in the art can clearly understand that, for the convenience and brevity of the description, the specific working process of the device and the unit described above can be referred to the corresponding process in the foregoing method embodiment, and details are not described herein again.

The UE provided in this embodiment, according to the received joint TAU/LAU accept message and the RAU and LAU accept message, confirms that the SGs association has been released, then deactivates the ISR, and ensures that the SGs association can be re-established when the UE returns to the E-UTRAN. The paging initiated at GERAN/UTRAN can successfully reach the UE. Improve the deployment effect of ISR and the reliability of the business. It will be understood by those of ordinary skill in the art that the drawings are only a schematic diagram of an embodiment, and the elements or processes in the drawings are not necessarily required to practice the invention.

In the several embodiments provided herein, it should be understood that the disclosed systems, devices, and methods may be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not executed. Alternatively, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in electrical, mechanical or other form. The components displayed as units may or may not be physical units, i.e., may be located in one place, or may be distributed over multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a hardware plus software functional unit.

The above-described integrated unit implemented in the form of a software functional unit can be stored in a computer readable storage medium. The software functional unit described above is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform portions of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: a USB flash drive, a mobile hard disk, a read-only memory (ROM), A variety of media that can store program code, such as Random Access Memory (RAM), disk, or optical disk.

It should be noted that the above embodiments are only for explaining the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: The technical solutions described in the foregoing embodiments are modified, or some of the technical features are equivalently replaced. The modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

Rights request

1. A circuit-switched fallback idle state saving signaling ISR processing method in a CSFB scenario, which is characterized in that it includes:

Receiving, by the user equipment UE, a first location area update accept message sent by the mobility management entity MME;

The method according to claim 1, wherein the receiving, by the UE, the first location area update accept message sent by the MME comprises:

And receiving, by the UE, a joint tracking area update T AU/location area update LAU accept message sent by the MME.

The method according to claim 1 or 2, wherein the receiving, by the UE, the second location area update accept message sent by the SGSN or the MSC comprises:

And receiving, by the SGSN, a joint routing area update RAU/LAU accept message carrying an activation indication, or the UE receiving an LAU accept message sent by the MSC.

The method according to claim 1, wherein the UE determines that the association between the MME and the SGs created by the MSC is released, and performs the deactivation of the ISR operation, including:

Determining, by the UE, that the MME and the MSC have created an SGs association according to the first location area update accept message; determining, according to the second location area update accept message, that the association between the MME and the SGs created by the MSC is released, and performing Deactivate the operation.

The method according to claim 4, wherein, before the UE determines that the association between the MME and the SGs created by the MSC is released according to the second location area update accept message, the UE further includes:

The UE updates the accept message according to the first location area, and the marked SGs association has been created.

The method according to claim 1, wherein the UE performs a deactivated ISR operation, including:

Set the temporary update ID TIN to P-TMSI.

7. A user equipment UE, characterized in that it comprises:

The UE according to claim 7, wherein the receiving unit receives the first location area update accept message sent by the MME, including:

The receiving unit receives a joint tracking area update TAU/location area update LAU accept message sent by the MME.

The UE according to claim 7 or 8, wherein the receiving unit receives the second location area update accept message sent by the SGSN or the MSC, including:

Receiving the joint routing area update RAU/location area of the carrying indication sent by the SGSN to update the LAU accept message, or receiving the location area update LAU accept message sent by the MSC.

10. The UE according to claim 7, wherein the determining unit determines the location The association between the MME and the SGs created by the MSC is released, including:

The determining unit determines, according to the first location area update accept message, that the MME and the MSC have created an SGs association;

And determining, according to the second location area update accept message, that the association between the MME and the SGs created by the MSC is released.