WO2012055093A1

WO2012055093A1 - Calling processing method and device in mobile switching center pool

Info

Publication number: WO2012055093A1
Application number: PCT/CN2010/078130
Authority: WO
Inventors: 于益俊; 陆峰
Original assignee: 华为技术有限公司
Priority date: 2010-10-26
Filing date: 2010-10-26
Publication date: 2012-05-03
Also published as: CN102232317B; CN102232317A

Abstract

The embodiment of present invention relates to a calling processing method and device in Mobile Switching Center (MSC) pool, and the method includes: Mobility Management Entity (MME) receives calling request message sent by MSC/VLR (Visitor Location Register) of MSC pool, and said calling request message includes International Mobile Subscriber Identity (IMSI) of User Equipment (UE), dose not include Temporary Mobile Subscriber Identity (TMSI) of said UE; Said MME sends TMSI of said UE or S-TMSI of said UE to said UE, in order to make said UE sends calling response message to said MSC/VLR through BSS/RNS, and said calling response message includes the TMSI message of said UE.

Description

Paging processing method and device in mobile switching center pool

The embodiments of the present invention relate to a mobile communication technology, and in particular, to a paging processing method and apparatus in a Mobile Switching Center (MSC) pool. Background technique

The Evolved Universal Mobile Telecommunication System Territorial Radio Access Network (E-UTRAN) and the Evolved Packet Core Network (EPC) form an Evolved Packet System (Evolved Packet System). Referred to as EPS). Since many services of the operators are currently running in the 2G/3G Circuit Switching (CS) domain, in order to reuse the existing CS domain services in the EPS network, it is proposed to connect to the CS domain core network through the EPS network. Therefore, the user equipment (User Equipment, UE for short) can initiate and receive the CS service in the EPS network, and return to the 2G/3G network to complete the CS service through the E-UTRAN. The network architecture and processing method can be referred to as “circuit domain fallback”. "(CS Fallback, CSFB for short).

Under the above CSFB architecture, an attached UE may be called by another UE to trigger a downlink voice call procedure (or may also be called a called/end call procedure). In the process of performing the foregoing downlink voice call, the Mobile Switching Center/Visitor Location Register (MSC/VLR) sends a paging request message to the Mobility Management Entity (MME). The MME is configured to send a paging message to the UE or directly send a circuit domain service notification message to the UE by using an Evolved NodeB (eNodeB). After the UE performs the CSFB process and falls back to the 2G/3G network, the UE sends a paging response message to the MSC/VLR through the Base Station Subsystem/Radio Network System (BSS/RNS) to complete the circuit domain. business. In the prior art, if the MSC pool (Pool) is configured on the network side, the MSC/VLR sends an International Mobile Subscriber Identity (IMSI) to the network (not including the Temporary Mobile Subscriber Identity). Referring to the paging request message of TMSI), the MME sends a paging message including the IMSI to the UE through the eNodeB or directly sends a circuit service notification message including the IMSI to the UE. After the UE performs the CSFB procedure to fall back to the 2G/3G network, the UE sends a paging response message including the foregoing IMSI to the BSS/RNS, and the BSS/RNS cannot select the MSC/VLR that sends the paging request message according to the IMSI. And causing the BSS/RNS to select any other MSC/VLR in the MSC pool, and send a paging response message to any of the other MSC/VLRs, so that any other MSC/VLR rejects the paging response message. The above BSS/RNS release circuit domain signaling connection is triggered, and the UE needs to perform an additional Location Area Update (LAU) process registration to any of the other MSC/VLRs, and any other MSC/VLR mentioned above. The MSC/VLR registered by the UE before performing the CSFB procedure also needs to perform a Roaming Retry process to complete the downlink voice call process. The above additional location area update and roaming retry procedures increase the processing delay of the downlink voice call process. , reducing business success rate and user experience. Summary of the invention

The embodiment of the invention provides a paging processing method and device in an MSC pool, so as to avoid performing CSFB in the MSC pool scenario due to the BSS/RNS failing to correctly select the MSC/VLR registered before the UE performs the CSFB process. Additional processing delays in the process to improve business success.

An embodiment of the present invention provides a paging processing method in an MSC pool, including:

The MME receives the paging request message sent by the MSC/VLR in the MSC pool, where the paging request message includes the IMSI of the UE, and does not include the TMSI of the UE;

Sending, by the MME, the TMSI of the UE or the S-TMSI of the UE to the UE, so that the UE sends a paging response message to the MSC/VLR by using the BSS/RNS, where the paging response message is sent. Contains TMSI information of the UE. The embodiment of the invention further provides a paging processing device in an MSC pool, including:

a receiving module, configured to receive a paging request message sent by the MSC/VLR in the MSC pool, where the paging request message includes an IMSI of the UE, and does not include the TMSI of the UE;

a sending module, configured to send, to the UE, a TMSI of the UE or an S-TMSI of the UE, to enable the UE to send a paging response message to the MSC/VLR by using a BSS/RNS, where the paging response is The message includes the TMSI information of the UE.

According to the foregoing technical solution, the MME can receive the paging request message of the IMSI of the UE and send the MSC/VLR in the MSC pool (that is, the MSC/VLR registered before the UE performs the CSFB process), so that the MME can Transmitting the TMSI of the UE or the S-TMSI of the UE to the UE, so that the UE and the MSC/VLR (that is, the MSC/VLR registered before the UE performs the CSFB procedure) can complete the circuit domain service, avoiding the MSC in the MSC. In the scenario of the pool, the BSS/RNS cannot correctly select the additional processing delay of the CSFB process caused by the MSC/VLR registered before the UE performs the CSFB process, which improves the service success rate. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are set forth in the description of the claims Other drawings may also be obtained from these drawings without the use of creative labor.

1 is a schematic flowchart of a paging processing method in an MSC pool according to Embodiment 1 of the present invention; FIG. 2 is a schematic flowchart of a paging processing method in an MSC pool according to Embodiment 2 of the present invention; FIG. 4 is a schematic flowchart of a paging processing method in an MSC pool according to Embodiment 4 of the present invention; FIG. 5 is a schematic flowchart of a paging processing method in an MSC pool according to Embodiment 4 of the present invention; Schematic diagram of the structure of the paging processing device. 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 obvious that the described embodiments are only a part of the embodiments of the present 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 scope are the scope of the present invention.

FIG. 1 is a schematic flowchart of a paging processing method in an MSC pool according to Embodiment 1 of the present invention. As shown in FIG. 1, the paging processing method in the MSC pool in this embodiment may include the following steps:

Step 101: The MME receives a paging request message sent by the MSC/VLR in the MSC pool, where the paging request message includes the IMSI of the UE, and does not include the TMSI of the UE.

Step 102: The MME sends the TMSI of the UE or the S-TMSI of the UE to the UE, so that the UE sends a paging response message to the MSC/VLR by using a BSS/RNS, where the paging response message includes the UE TMSI information.

The TMSI information of the UE may include, but is not limited to, the TMSI of the UE, and an Intra Domain NAS Node Selector (IDNNS), where the IDNNS is known by the TMSI of the UE.

In this embodiment, the MME receives the paging request message including the IMSI of the UE sent by the MSC/VLR in the MSC pool (that is, the MSC/VLR registered before the UE performs the CSFB procedure), so that the MME can send the foregoing to the UE. The TMSI of the UE or the S-TMSI of the UE, so that the UE and the MSC/VLR (that is, the MSC/VLR registered before the UE performs the CSFB process) can complete the circuit domain service, thereby avoiding the scenario in the MSC pool. The BSS/RNS cannot correctly select the additional processing delay of the CSFB process caused by the MSC/VLR registered before the UE performs the CSFB process, which improves the service success rate.

FIG. 2 is a schematic flowchart of a paging processing method in an MSC pool according to Embodiment 2 of the present invention. As shown in FIG. 2, the paging processing method in the MSC pool in this embodiment may include the following steps:

Step 201: The MSC/VLR in the MSC pool receives an Initial Address Message (IAM);

Step 202: The MSC/VLR sends a paging request (Paging Request) message to the MME. The paging request message includes the IMSI of the UE;

Specifically, in this step, an abnormal situation occurs in the MSC/VLR, for example, the TMSI of the UE is lost, so that after receiving the initial address message sent by the MSC/VLR, the IMSI including the UE is sent to the MME (ie, the TMSI not including the UE) Paging request message.

Step 203: If the MME learns the TMSI of the UE, the MME sends a message including the TMSI of the learned UE to the MSC/VLR, to indicate that the MSC/VLR uses the TMSI of the UE to perform paging;

In this step, the TMSI of the UE is obtained by the MME according to the context of the UE. Specifically, the MME may learn the TMSI of the UE in the attach or joint location tracking area/location area update procedure before the flow in this embodiment, and store it in the context of the UE.

The message that the MME sends to the MSC/VLR and includes the TMSI of the UE may be an existing service request (Service Request) message, or may be a new SGs interface message, for example: Paging Response (Paging Response) The message, this embodiment does not limit the specific message name.

Step 204: The MSC/VLR sends a paging request (Paging Request) message to the MME, where the paging request message includes the TMSI of the UE;

Step 205: The MME performs call processing on the UE.

Specifically, when the UE is in the idle state (Idle Mode), only step 205a is performed. When the UE is in the connected state (Active Mode), only step 205b is performed:

Step 205a: The MME sends a paging (Paging) message to the UE by using the eNodeB, where the paging message includes the S-TMSI and the CS Domain Indicator of the UE.

Specifically, the MME sends a paging (Paging) message including the S-TMSI and the circuit domain indication of the UE to the eNodeB, and the eNodeB sends a paging (Paging) message including the S-TMSI and the circuit domain indication of the UE to the UE. The S-TMSI is obtained by the MME according to the context of the UE. Specifically, the MME may learn the S-TMSI of the UE and attach it to the context of the UE in the attach or joint location tracking area/location area update procedure before the process in this embodiment. Medium.

Step 205b, the MME sends a CS Domain Notification (CS Service Notification) message to the UE, where the circuit domain service notification message includes the TMSI of the UE;

Step 206: The UE establishes a Radio Resource Control (RRC) connection, and sends an Extended Service Request message to the MME through the eNodeB, where the service request message includes a CSFB indication.

Step 207: The MME sends a Service Request message to the MSC/VLR, so that the MSC/VLR stops retransmitting the paging request message.

Step 208: The eNodeB executes the CSFB process.

Specifically, the foregoing CSFB process may include: eNodeB performs packet switched domain switching (PS)

Handover, referred to as PS HO), or perform network Assisted Cell Change (NACC) or perform Radio Resource Control Connection Release (RRC Connection Release) to migrate the UE to 2G. /3G network.

Step 209: The UE sends a paging response message to the BSS/RNS, where the paging response message includes the TMSI information of the UE.

Specifically, the step may specifically include, but is not limited to, the following methods:

A. The target radio access technology (RAT) is the GERAN A/Gb mode;

The UE sends a Set Asynchronous Balanced Mode (SABM) message to the BSS, where the SABM message includes a Paging Response message, where the paging response message includes the TMSI of the UE;

B. The target RAT is the UTRAN/GERAN lu mode.

The paging response message may be an initial direct transmission (INITIAL DIRECT TRANSFER) message, that is, the UE sends an initial direct transmission message to the BSS/RNS, where the initial direct transmission message includes the TMSI of the UE or the intra-domain NAS node selection indication ( Intra Domain NAS Node Selector (IDNNS), wherein the IDNNS is known according to the TMSI of the UE.

Step 210: The BSS/RNS sends the paging response (Paging Response) message to the MSC/VLR.

Specifically, the foregoing BSS/RNS is based on the foregoing included in the received paging response message.

The TMSI information of the UE is learned by the corresponding MSC/VLR, and the paging response message is sent to the MSC/VLR.

So far, through the above steps 209 and 210, the UE completes the circuit domain service with the MSC/VLR.

In this embodiment, when the MSC/VLR in the MSC pool initiates an IMSI page to the MME (ie,

When the MSC/VLR sends a paging request message including the IMSI of the UE to the MME, the MME provides the TMSI of the UE to the MSC/VLR, so that the MSC/VLR can initiate the TMSI paging to the MME (ie, the MSC/VLR sends the UE to the MME. TMSI's Paging Request message), so that the MME can perform TMSI/S-TMSI call processing on the UE, so that the UE and the UE can perform the CSFB process before the MSC/VLR is registered to complete the circuit domain service, thereby avoiding In the scenario of the MSC pool, the BSS/RNS cannot correctly select the additional processing delay of the CSFB process caused by the MSC/VLR registered before the UE performs the CSFB process, thereby improving the service success rate.

FIG. 3 is a schematic flowchart of a paging processing method in an MSC pool according to Embodiment 3 of the present invention. As shown in FIG. 3, the paging processing method in the MSC pool in this embodiment may include the following steps:

Step 301: The MSC/VLR receives an Initial Address Message (IAM);

Step 302: The MSC/VLR sends a paging request (Paging Request) message to the MME, where the paging request message includes the IMSI of the UE;

Specifically, in this step, an abnormal situation occurs in the MSC/VLR, for example, the TMSI of the UE is lost, so that after receiving the initial address message sent by the MSC/VLR, the UE is sent to the MME. A paging request message for the IMSI (ie, TMSI that does not contain the UE).

Step 303: If the MME learns the TMSI of the UE or the S-TMSI of the UE, the MME performs the pair.

Call processing of the UE;

Specifically, when the UE is in the idle state (Idle Mode), only step 303a is performed. When the UE is in the connected state (Active Mode), only step 303b is performed:

Step 303a: If the MME learns the S-TMSI of the UE, the MME sends a paging (Paging) message to the UE by using the eNodeB, where the paging message includes the S-TMSI and the CS Domain Indicator of the UE.

Specifically, the MME sends a paging (Paging) message including the S-TMSI and the circuit domain indication of the UE to the eNodeB, and the eNodeB sends a paging (Paging) message including the S-TMSI of the UE and the circuit domain indication to the UE. The S-TMSI of the UE is obtained by the MME according to the context of the UE. Specifically, the MME may learn the S-TMSI of the UE in the attach or joint location tracking/location area update procedure before the flow in this embodiment, and store it in the context of the UE.

Step 303b: If the MME learns the TMSI of the UE, the MME sends a CS Service Notification message to the UE, where the circuit domain service notification message includes the TMSI of the UE.

The TMSI of the UE is known by the MME according to the context of the UE. Specifically, the MME may learn the TMSI of the UE in the attach or joint location tracking area/location area update procedure before the flow in this embodiment, and store it in the context of the UE.

Step 304: The UE establishes a Radio Resource Control (RRC) connection, and sends an Extended Service Request message to the MME through the eNodeB, where the service request message includes a CSFB indication.

Step 305: The MME sends a service request (Service Request) message to the MSC/VLR, where the service request message includes the TMSI of the UE.

Through this step, the MSC/VLR can learn the foregoing UE according to the foregoing service request message. The TMSI is used to learn the context of the UE when the UE receives the paging request message including the TMSI of the UE sent by the BSS/RNS, so that the circuit domain service between the UE and the MSC/VLR is normally performed.

Step 306: The eNodeB executes a CSFB process.

Step 307: The UE sends a paging response message to the BSS/RNS, where the paging response message includes the TMSI information of the UE.

A. The target radio access technology (RAT) is the GERAN A/Gb mode;

B. The target RAT is the UTRAN/GERAN lu mode.

The paging response message may be an initial direct transmission (INITIAL DIRECT TRANSFER) message, that is, the UE sends an initial direct transmission message to the BSS/RNS, where the initial direct transmission message includes the TMSI of the UE or the intra-domain NAS node selection function ( Intra Domain NAS Node Selector (IDNNS), wherein the IDNNS is known according to the TMSI of the UE.

Step 308: The BSS/RNS sends the paging response (Paging Response) message to the MSC/VLR.

Specifically, the foregoing BSS/RNS is configured according to the foregoing information included in the received paging response message. The TMSI information of the UE is learned by the corresponding MSC/VLR, and the paging response message is sent to the MSC/VLR.

So far, through the above steps 307 and 308, the UE completes the circuit domain service with the MSC/VLR.

When the MSC/VLR sends a paging request message including the IMSI of the UE to the MME, the MME can perform call processing on the TMSI/S-TMSI of the UE and provide the TMSI of the UE to the MSC/VLR, so that the UE can be made The MSC/VLR (that is, the MSC/VLR registered before the UE performs the CSFB procedure) completes the circuit domain service, and avoids the MSC that is registered before the UE performs the CSFB process because the BSS/RNS cannot correctly select the scenario in the MSC pool. The additional processing delay caused by the VLR to perform the CSFB process increases the business success rate.

4 is a schematic flowchart of a paging processing method in an MSC pool according to Embodiment 4 of the present invention. As shown in FIG. 4, the paging processing method in the MSC pool in this embodiment may include the following steps:

Step 401: The MSC/VLR receives an Initial Address Message (I AM);

Step 402: The MSC/VLR sends a paging request (Paging Request) message to the MME, where the paging request message includes the IMSI of the UE;

Step 403: The MME sends a message to the MSC/VLR, to indicate that the MSC/VLR allocates the TMSI of the UE, that is, the MSC/VLR is configured to allocate the TMSI to the UE.

Specifically, the message sent by the MME to the MSC/VLR may be an existing location update request (Location Update Request) message, or may be an extended service request (Service Request) message, or may be a new SGs. An interface message, for example, a paging response (Paging Response) message, this embodiment does not limit the specific message name. The extended service request message or the paging response message includes a TMSI Reallocation Indicator (TMSI), and the TMSI reallocation indicator indicates that the MSC/VLR allocates a TMSI to the UE.

Step 404: The MSC/VLR sends a response message to the MME, where the response message includes the TMSI of the UE allocated by the MSC/VLR.

Specifically, after receiving the foregoing message sent by the MME, the MSC/VLR allocates a TMSI to the UE, and sends a response message to the MME, where the response message includes the TMSI of the UE allocated by the MSC/VLR.

Specifically, if the message sent by the MME is a service request message or a page response message, the response message may be a paging request (Paging Request) message, where the paging request message includes the TMSI of the UE allocated by the MSC/VLR. If the message sent by the MME is a location update request message, the response message may be a location update accept message, where the location update accept message includes the TMSI of the UE allocated by the MSC/VLR. Further, after the MSC/VLR sends the location update accept message to the MME, the MSC/VLR may further send a paging request message to the MME, where the paging request message includes the TMSI of the UE allocated by the MSC/VLR.

Step 405: The MME performs call processing on the UE.

Specifically, when the UE is in the idle state (Idle Mode), only step 405a is performed. When the UE is in the connected state (Active Mode), only step 405b is performed:

Step 405a: The MME performs call processing on the UE in an idle state.

The MME may send the TMSI of the UE allocated by the learned MSC/VLR to the UE in the process of performing this step.

A, the MME sends a paging message including the circuit domain indication to the UE through the eNodeB, and after the UE enters the connection state, sends the TMSI of the UE allocated by the learned MSC/VLR to the UE by using the NAS message; Specifically, the MME sends a paging (Paging) message to the eNodeB, where the paging message includes the S-TMSI of the UE or the IMSI of the UE, and the CS Domain Indicator, and the eNodeB sends a paging message to the UE. The paging message includes an S-TMSI of the UE or an IMSI of the UE, and a CS Domain Indicator, where the UE sends an extended service request message to the MME, where the extended service request message includes a CSFB indication, and the MME sends the message to the UE. The NAS message of the TMSI of the above UE allocated by the above-mentioned learned MSC/VLR.

The NAS message may be an existing EPS Mobility Management (EMM) message (EMM INFORMATION) message; or may be an existing Globally Unique Temporary Identity (GUTI). The GUTI reallocation command message; or it may be an existing CS Service Notification message; or it may be a new NAS interface message, for example: TMSI reallocation command message This embodiment does not limit the specific message name.

At this time, the UE uses the TMSI of the UE allocated by the foregoing MSC/VLR received from the MME as a new temporary identifier (ie, the UE deletes the old TMSI stored thereon, and stores the TMSI of the UE).

B, the MME sends a paging message including the circuit domain indication to the UE through the eNodeB, and after the UE enters the connection state, sends the TMSI of the UE allocated by the learned MSC/VLR to the UE through the eNodeB;

Specifically, the MME sends a paging (Paging) message to the eNodeB, where the paging message includes the S-TMSI of the UE or the IMSI of the UE, and the CS Domain Indicator, and the eNodeB sends a paging message to the UE. The paging message includes the S-TMSI of the UE or the IMSI of the UE, and the CS Domain Indicator. The UE sends an extended service request message to the MME, where the extended service request message includes a CSFB indication, and the MME sends an eNodeB to the MME. The UE transmits a message including the TMSI of the UE allocated by the learned MSC/VLR. The message that the MME sends the TMSI of the UE allocated by the learned MSC/VLR to the UE by using the eNodeB may be: the MME sends an initial context setup request (INITIAL CONTEXT SETUP REQUESE) message to the eNodeB, where the initial context setup request message is sent. The TMSI of the UE allocated by the MSC/VLR allocated by the foregoing, the eNodeB sends a Handover Command message or a Cell Change Order message or an RRC Connection Release message to the UE, and the foregoing handover command The message or cell change command message or the RRC connection release message includes the TMSI of the UE allocated by the learned MSC/VLR.

At this time, the UE uses the TMSI of the UE allocated by the foregoing MSC/VLR received from the eNodeB as a new temporary identifier (ie, the UE deletes the old TMSI stored thereon, and stores the TMSI of the UE).

C, the MME sends a paging message including the circuit domain indication to the UE through the eNodeB, and sends the TMSI of the UE allocated by the learned MSC/VLR to the UE by using the paging message;

Specifically, the MME sends a paging (Paging) message to the eNodeB, where the paging message includes the S-TMSI of the UE or the IMSI of the UE (as a paging identifier), and the CS Domain Indicator and the MSC/VLR. The allocated TMSI of the UE, the eNodeB sends a paging (Paging) message to the UE, where the paging message includes the S-TMSI of the UE or the IMSI of the UE (as a paging identifier), and a CS Domain Indicator and The TMSI of the UE allocated by the MSC/VLR, the UE sends an extended service request message to the MME, where the extended service request message includes a CSFB indication.

The paging message may include an independent parameter (for example, new TMSI) for indicating the TMSI of the UE allocated by the MSC/VLR, and the name of the independent parameter is not limited in this embodiment.

At this time, the UE uses the TMSI of the UE allocated by the MSC/VLR received from the eNodeB as a new temporary identifier (ie, the UE deletes the old TMSI stored thereon, and stores the TMSI of the UE). D, the MME sends a paging message including the packet domain indication to the UE through the eNodeB, and after the UE enters the connection state, sends the TMSI of the UE allocated by the learned MSC/VLR to the UE by using the NAS message;

Specifically, the MME sends a paging (Paging) message to the eNodeB, where the paging message includes the S-TMSI of the UE or the IMSI of the UE, and the PS Domain Indicator, and the eNodeB sends a paging message to the UE. The paging message includes the S-TMSI of the UE or the IMSI of the UE, and the PS Domain Indicator. The UE sends a service request message to the MME, and the MME sends a NAS message to the UE, where the NAS message includes the learned information. The TMSI of the above UE allocated by the MSC/VLR.

The NAS message may be an existing EPS mobility management (EPS Mobility).

Management (EMM) message; or it may be an existing Globally Unique Temporary Identity (GUTI) relocation command (GUTI reallocation command) message; or it may be an existing circuit A CS Service Notification message; or a new NAS interface message, such as a TMSI reallocation command message. This embodiment does not limit the specific message name.

Further, after receiving the foregoing N AS message, the UE may further send an extended service request message to the MME, where the extended service request message includes a CSFB indication.

E, the MME sends a paging message including the packet domain indication to the UE through the eNodeB, and after the UE enters the connection state, sends the TMSI of the UE allocated by the learned MSC/VLR to the UE through the eNodeB;

Specifically, the MME sends a paging (Paging) message to the eNodeB, where the paging message includes an S-TMSI of the UE or an IMSI of the UE, and a PS Domain Indicator. The eNodeB sends a Paging message to the UE, where the paging message includes the S-TMSI of the UE or the IMSI of the UE, and the PS Domain Indicator, and the UE sends an extended service request message to the MME, where the extended service request is sent. The message includes a CSFB indication, and the MME sends, by using the eNodeB, a message including the TMSI of the UE allocated by the learned MSC/VLR to the UE.

The message that the MME sends the TMSI of the UE that is allocated by the MSC/VLR to the UE by using the eNodeB may be: the MME sends an initial context setup request (INITIAL CONTEXT SETUP REQUESE) message or a UE context modification request to the eNodeB. The CONTEXT MODIFICATION REQUESE message, the foregoing initial context setup request message or the UE context modification request includes the TMSI of the UE allocated by the learned MSC/VLR, and the eNodeB sends a handover command (Handover Command) message or a cell change command (Cell Change) to the UE. The message or the RRC Connection Release message, the handover command message or the cell change command message or the RRC connection release message includes the TMSI of the UE allocated by the learned MSC/VLR.

Step 405b: The MME performs call processing on the UE in the connected state.

The MME may send the TMSI of the UE allocated by the learned MSC/VLR to the UE in the process of performing the step;

After the MME sends the circuit domain service notification message to the UE, the MME sends the TMSI of the UE allocated by the learned MSC/VLR to the UE through the NAS message;

Specifically, the MME sends a circuit domain service notification message to the UE, and the UE sends an extended service request message to the MME, where the extended service request message includes a CSFB indication, and the MME sends the TMSI of the UE that is allocated by the learned MSC/VLR to the UE. NAS message. The foregoing NAS message may specifically be an existing EMM information (EMM INFORMATION) message; or may be an existing GUTI reallocation command message; or may be an existing circuit domain service notification (CS) Service Notification) message; or a new NAS interface message, such as: TMSI reallocation command message, this embodiment does not limit the specific message name.

After the MME sends the circuit domain service notification message to the UE, the eNodeB sends the TMSI of the UE allocated by the learned MSC/VLR to the UE through the eNodeB;

Specifically, the MME sends a circuit domain service notification message to the UE, and the UE sends an extended service request message to the MME, where the extended service request message includes a CSFB indication, and the MME sends the UE that includes the learned MSC/VLR allocation to the UE by using the eNodeB. TMSI news.

The message that the MME sends the TMSI of the UE that is allocated by the MSC/VLR to the UE by using the eNodeB may be: the MME sends a UE CONTEXT MODIFICATION REQUESE message to the eNodeB, where the UE context modification request message is sent. The eNodeB includes the TMSI of the UE allocated by the MSC/VLR, and the eNodeB sends a Handover Command message or a Cell Change Order message or an RRC Connection Release message to the UE. The message or cell change command message or the RRC connection release message includes the TMSI of the UE allocated by the learned MSC/VLR.

C. The MME sends the learned MSC/VLR score to the UE through the circuit domain service notification message. Matching the TMSI of the above UE;

Specifically, the MME sends a circuit domain service notification message to the UE, where the circuit domain service notification message includes the TMSI of the UE allocated by the MSC/VLR, and the UE sends an extended service request message to the MME, where the extended service request message includes a CSFB indication. . The above-mentioned circuit domain service notification message may include an independent parameter (for example, new TMSI) for indicating the TMSI of the UE allocated by the foregoing MSC/VLR, and the embodiment does not limit the name of the independent parameter.

D. Before sending the circuit domain service notification message to the UE, the MME sends the TMSI of the UE allocated by the learned MSC/VLR to the UE through the NAS message.

Specifically, the MME sends a NAS message to the UE, where the NAS message includes the TMSI of the UE allocated by the learned MSC/VLR, and the MME sends a circuit domain service notification message to the UE, and the UE sends an extended service request message to the MME, where the extended service request is sent. The message contains a CSFB indication.

The foregoing NAS message may be an existing EMM information (EMM).

The message may be an existing GUTI reallocation command message; or may be a new NAS interface message, for example: TMSI reallocation command message, this embodiment is The specific message name is not limited.

Step 406: The MME sends a Service Request message to the MSC/VLR, so that the MSC/VLR stops retransmitting the paging request message.

Step 407: The eNodeB executes the CSFB process.

Specifically, the foregoing CSFB process may include: eNodeB performs packet switched domain switching (PS) Handover, referred to as PS HO), or perform network Assisted Cell Change (NACC) or perform Radio Resource Control Connection Release (RRC Connection Release) to migrate the UE to 2G. /3G network.

Step 408: The UE sends a paging response message to the BSS/RNS, where the paging response message includes the TMSI information of the UE.

A. The target radio access technology (RAT) is the GERAN A/Gb mode;

B. The target RAT is the UTRAN/GERAN lu mode.

Step 409: The BSS/RNS sends a Paging Response message to the MSC/VLR.

Specifically, the BSS/RNS obtains the corresponding MSC/VLR according to the TMSI information of the UE included in the received paging response message, and sends the paging response message to the MSC/VLR.

So far, through the above steps 408 and 409, the UE and the MSC/VLR complete the circuit domain service.

In this embodiment, when the MSC/VLR in the MSC pool initiates an IMSI paging to the MME (ie, When the MSC/VLR sends a paging request message including the IMSI of the UE to the MME, the MME sends a message to the MSC/VLR to trigger the MSC/VLR to allocate the TMSI to the UE, so that the MSC/VLR provides the MSC/VLR allocation to the UE. The TMSI of the UE, so that the MSC/VLR registered before the UE and the UE perform the CSFB procedure completes the circuit domain service, and avoids the registration in the MSC pool scenario because the BSS/RNS cannot correctly select the UE to execute the CSFB process. The MSC/VLR results in an additional processing delay for the execution of the CSFB process, which improves the business success rate.

It should be noted that, for the foregoing method embodiments, for the sake of simple description, they are all expressed as a series of action combinations, but those skilled in the art should understand that the present invention is not limited by the described action sequence. Because in accordance with the present invention, certain steps may be performed in other sequences or concurrently. In addition, those skilled in the art should also understand that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

In the above embodiments, the descriptions of the various embodiments are different, and the parts that are not detailed in a certain embodiment can be referred to the related descriptions of other embodiments.

FIG. 5 is a schematic structural diagram of a paging processing apparatus in an MSC pool according to Embodiment 5 of the present invention. As shown in FIG. 5, the paging processing apparatus in the MSC pool of this embodiment may include a receiving module 51 and a sending module 52. The receiving module 51 receives the paging request message sent by the MSC/VLR in the MSC pool, where the paging request message includes the IMSI of the UE, does not include the TMSI of the UE, and the sending module 52 sends the TMSI of the UE to the UE or The S-TMSI of the UE is configured to send the paging response message to the MSC/VLR by using the BSS/RNS, where the paging response message includes the TMSI information of the UE.

The functions of the MME in the first embodiment of the present invention, the MME in the second embodiment of the present invention, the MME in the third embodiment of the present invention, and the MME in the fourth embodiment of the present invention are all implemented by the paging processing device in the MSC pool provided in this embodiment. .

In this embodiment, the receiving module receives the paging request message including the IMSI of the UE sent by the MSC/VLR in the MSC pool (that is, the MSC/VLR registered before the UE performs the CSFB procedure), so that the sending module can send the message to the UE. The TMSI of the above UE or the S-TMSI of the above UE, Therefore, the foregoing UE and the MSC/VLR (that is, the MSC/VLR registered before the UE performs the CSFB process) can complete the circuit domain service, and the BSS/RNS cannot be correctly selected to perform the CSFB process in the scenario of the MSC pool. The additional processing delay of the CSFB process caused by the previously registered MSC/VLR improves the service success rate.

Specifically, the sending module 52 in this embodiment may be specifically configured to use the eNodeB to

The UE sends a paging message, where the paging message includes the S-TMSI of the UE; or may be further configured to send a circuit domain service notification message to the UE, where the circuit domain service notification message includes the TMSI of the UE; or The TMSI of the UE allocated by the MSC/VLR allocated by the eNodeB to the UE; or may be used to send the learned TMSI of the UE allocated by the MSC/VLR to the UE.

Further, the sending module 52 in this embodiment may further learn the TMSI of the UE or the S-TMSI of the UE according to the context of the UE; or may further send a message to the MSC/VLR to enable the MSC/ The VLR allocates the TMSI of the UE, and learns the TMSI of the UE allocated by the MSC/VLR from the MSC/VLR.

A person skilled in the art can understand that all or part of the steps of implementing the above method embodiments may be completed by using hardware related to program instructions, and the foregoing program may be stored in a computer readable storage medium, and the program is executed when executed. The foregoing steps include the steps of the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an 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

A paging processing method in a MSC pool of a mobile switching center, comprising: a mobility management entity MME receiving a paging request message sent by a mobile switching center/visiting location register MSC/VLR in an MSC pool, The paging request message includes an international mobile subscriber identity IMSI of the user equipment UE, and does not include the temporary mobile subscriber identity TMSI of the UE; the MME sends the TMSI of the UE or the S- of the UE to the UE. The TMSI is configured to send the paging response message to the MSC/VLR by using the base station subsystem/radio network system BSS/RNS, where the paging response message includes the TMSI information of the UE.

The method according to claim 1, wherein before the MME sends the TMSI of the UE or the S-TMSI of the UE to the UE, the method further includes:

The MME learns the TMSI of the UE or the S-TMSL of the UE according to the context of the UE.

The method according to claim 1 or 2, wherein the sending, by the MME, the TMSI of the UE or the S-TMSI of the UE to the UE comprises:

The MME sends a paging message to the UE by using the evolved base station eNodeB, where the paging message includes the S-TMSI of the UE; or

The MME sends a circuit domain service notification message to the UE, where the circuit domain service notification message includes the TMSI of the UE.

The method according to claim 1 or 2, further comprising:

The MME sends the TMSI of the UE to the MSC/VLR.

Sending, by the MME, a message to the MSC/VLR, so that the MSC/VLR allocates the TMSI of the UE;

The MME learns, from the MSC/VLR, the UE that is allocated by the MSC/VLR

TMSL

The method according to claim 1 or 5, wherein the sending, by the MME, the TMSI of the UE or the S-TMSI of the UE to the UE includes:

Sending, by the eNodeB, the TMSI of the UE allocated by the MSC/VLR to the UE by using an eNodeB; or

Sending, by the MME, the learned UE to the UE that is allocated by the MSC/VLR

TMSL

The method according to claim 6, wherein the MME sends the learned TMSI of the UE allocated by the MSC/VLR to the UE by using an eNodeB, including:

Sending, by the MME, a paging message to the eNodeB, where the paging message sent by the MME to the eNodeB includes the learned TMSI of the UE allocated by the MSC/VLR, and the eNodeB sends a search to the UE. And the paging message sent by the eNodeB to the UE includes the TMSI of the UE allocated by the MSC/VLR; or

The MME sends an initial context setup request message or a context modification request message to the eNodeB, where the initial context setup request message or the context modification request message includes the learned TMSI of the UE allocated by the MSC/VLR, The eNodeB sends a handover command message, a cell change command message, or an RRC connection release message to the UE, where the handover command message, the cell change command message, or the RRC connection release message includes the UE allocated by the MSC/VLR TMSI.

The method according to claim 6, wherein the sending, by the MME, the learned TMSI of the UE allocated by the MSC/VLR to the UE includes:

Sending, by the MME, a circuit domain service notification message to the UE, where the circuit domain service notification message includes the learned TMSI of the UE allocated by the MSC/VLR; or

Sending, by the MME, an EMM information message to the UE, where the EMM information message includes the learned TMSI of the UE allocated by the MSC/VLR; or

Sending, by the MME, a GUTI re-allocation command message to the UE, where the GUTI re-allocation command message includes the learned TMSI of the UE allocated by the MSC/VLR; or The MME sends a TMSI re-allocation command message to the UE, where the TMSI re-allocation command message includes the learned TMSI of the UE allocated by the MSC/VLR.

A paging processing device in a MSC pool of a mobile switching center, comprising: a receiving module, configured to receive a paging request message sent by a mobile switching center/visiting location register MSC/VLR in an MSC pool, The paging request message includes an international mobile subscriber identity IMSI of the user equipment UE, and does not include the temporary mobile subscriber identity TMSI of the UE;

a sending module, configured to send, to the UE, a TMSI of the UE or an S-TMSI of the UE, to enable the UE to send a paging response to the MSC/VLR by using a base station subsystem/radio network system BSS/RNS The message, the paging response message includes the TMSI information of the UE.

The device according to claim 9, wherein the sending module is specifically configured to: send, by using the evolved base station eNodeB, a paging message to the UE, where the paging message includes the S of the UE TMSI; or

Transmitting, to the UE, a circuit domain service notification message, where the circuit domain service notification message includes the TMSI of the UE; or

Sending, by the eNodeB, the learned UE to the UE that is allocated by the MSC/VLR

TMSI; or

Sending the learned TMSI of the UE allocated by the MSC/VLR to the UE.

The device according to claim 9 or 10, wherein the sending module is further configured to:

Obtaining, according to the context of the UE, the TMSI of the UE or the S-TMSI of the UE; or

Transmitting a message to the MSC/VLR to cause the MSC/VLR to allocate the TMSI of the UE, and to learn from the MSC/VLR the TMSI of the UE allocated by the MSC/VLR.