WO2011130904A1

WO2011130904A1 - Method for processing location update, method and device for processing service

Info

Publication number: WO2011130904A1
Application number: PCT/CN2010/071886
Authority: WO
Inventors: 于益俊; 陆峰; 袁立平
Original assignee: 华为技术有限公司
Priority date: 2010-04-19
Filing date: 2010-04-19
Publication date: 2011-10-27
Also published as: CN102550085B; CN102550085A

Abstract

A method for processing location update, a method and device for processing service are provided. The method for processing location update includes that: an Interworking Function (IWF) network element obtains Circuit Switching Fallback (CSFB) information which includes Mobile Switching Centre (MSC)/ Visitor Location Register (VLR) information; according to the CSFB information, the IWF network element knows that the CSFB type of a User Equipment (UE) is Gs CSFB; the IWF network element sends location update information with the MSC/VLR information included to a Home Location Register (HLR)/ Home Subscriber Server (HSS). The IWF network element in embodiments of the invention can send information to a corresponding network entity according to the obtained CSFB information, so the CSFB is achieved without upgrading all MSC/VLRs in the existing network, therefore the CSFB service is implemented by original MSC/VLRs, and Short Message Service (SMS) is implemented by upgrading the IWF network element, thus reducing operation costs.

Description

Location update processing method, business processing method and device

The present invention relates to the field of communications technologies, and in particular, to a method, a service processing method and a device for processing a location update. Background technique

The Evolved Universal Mobile Telecommunication System Territorial Radio Access Network (E-UTRAN) and the Evolved Packet Core (EPC) are formed by the Evolved Universal Mobile Telecommunication System (UMTS). Evolved Packet System (EPS). Since the operator operates in the circuit of the 2/3G radio access network (Circuit Switching, CS for short), in order to reuse the existing CS domain service in the EPS network, it is proposed to connect to the EPS network through the EPS network. The CS domain core network method enables the user equipment (User Equipment, UE for short) to return to the 2/3G network to complete the CS service through the E-UTRAN. The network architecture and processing method may be referred to as "CS Fallback". Referred to as CSFB). Under the above network architecture, the Mobility Management Entity (MME) in the EPS network is connected to the Mobile Switching Centre (MSC)/Visit Location Register of the traditional CS domain core network through an SGs interface. (Visitor Location Register, referred to as VLR).

In the process of implementing the present invention, the inventor has found that at least the following problems exist in the prior art: The SGs interface is a new interface, and all MSC/VLRs of the existing network need to be upgraded, even if the operator does not use the CSFB service, but supports CSFB roaming also requires upgrading all MSC/VLRs to meet the needs of roaming users, thereby increasing operating costs. Summary of the invention The embodiment of the present invention provides a method for processing a location update, a service processing method, and a device, which are used to solve the problem that the existing CSFB network architecture needs to upgrade all MSC/VLRs, and implement the CSFB service by using the original MSC/VLR, and Utilize upgrade interworking function network elements (Interworking

Function, referred to as IWF), performs SMS to reduce operating costs.

An embodiment of the present invention provides a method for processing a location update, including:

The IWF obtains CSFB information, and the CSFB information includes MSC/VLR information;

The IWF learns that the CSFB type of the UE is Gs CSFB according to the foregoing CSFB information; the IWF sends an update location message including the foregoing MSC/VLR information to the HLR/HSS;

Or

The IWF obtains CSFB information;

The IWF learns that the CSFB type of the UE is Gs CSFB according to the CSFB information; the IWF sends an accept message to the MME, and the MME sends a location update request message to the MSC/VLR, and the MSC/VLR sends an update location message to the HLR/HSS;

Or

The IWF receives the request message sent by the MME that does not carry the SMS-only indication;

The IWF sends an accept message to the MME, and the MME sends a location update request message to the MSC/VLR, and the MSC/VLR sends an update location message to the HLR/HSS.

The embodiment of the invention provides a service processing method, including:

The IWF learns that the CSFB type of the UE is Gs CSFB;

If the IWF receives the short message sent by the SMS-GMSC, the IWF sends a paging message to the MME;

If the IWF receives the initial address message sent by the GMSC, the IWF sends the initial address message to the MSC/VLR.

The embodiment of the invention further provides an interworking function network element, including:

a first obtaining module, configured to acquire CSFB information, where the CSFB information includes MSC/VLR information; a first learning module, configured to learn, according to the CSFB information, that the type of the CSFB of the UE is Gs CSFB;

a first sending module, configured to send, to the HLR/HSS, an update location message including the foregoing MSC/VLR information; or

a second obtaining module, configured to acquire CSFB information;

a second learning module, configured to learn, according to the CSFB information, that the type of the CSFB of the UE is Gs CSFB;

a second sending module, configured to send an accept message to the MME, where the MME sends a location update request message to the MSC/VLR, where the MSC/VLR sends an update location message to the HLR/HSS; or

a third acquiring module, configured to receive a request message that is sent by the MME and does not carry an SMS-only indication; a third sending module, configured to send an accept message to the MME, where the MME sends a location update request message to the MSC/VLR, where the MSC/ The VLR sends an update location message to the HLR/HSS.

An embodiment of the present invention further provides another interworking function network element, including:

The learning module is configured to learn that the type of the CSFB of the UE is Gs CSFB;

a first sending module, configured to send a paging message to the MME if receiving the short message sent by the SMS-GMSC;

The second sending module is configured to send the initial address message to the MSC/VLR if receiving the initial address message sent by the GMSC.

The embodiment of the invention further provides a mobility management network element, including:

The sending module is configured to send a request message to the IWF, where the request message carries the CSFB information, and sends a location update request message to the MSC/VLR.

According to the foregoing technical solution, the IWF in the embodiment of the present invention can send a message to the corresponding network entity according to the learned CSFB information, so that the CSFB can be completed without upgrading all the MSCs/VLRs in the existing network, so that the original MSC can be utilized. /VLR implements CSFB service, and utilizes liter Level IWF for SMS reduces operating costs. DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any creative work.

FIG. 1 is a schematic flowchart of a method for processing a location update according to Embodiment 1 of the present invention; FIG. 1B is a schematic diagram of a network architecture based on a method for processing location update according to Embodiment 1 of the present invention;

2A is a schematic flow chart of another method for processing location update according to Embodiment 2 of the present invention;

FIG. 2B is a schematic diagram of a network architecture based on another method for processing location update according to Embodiment 2 of the present invention; FIG.

2C is a schematic diagram of a protocol stack corresponding to another method for processing location update according to Embodiment 2 of the present invention;

3A is a schematic flowchart of a service processing method according to Embodiment 3 of the present invention;

FIG. 3B is a schematic diagram of a protocol stack corresponding to a service processing method according to Embodiment 3 of the present invention; FIG. 4 is a schematic flowchart of a method for processing a location update according to Embodiment 4 of the present invention; FIG. Another schematic diagram of the processing method of location update;

6 is a schematic flowchart of a service processing method according to Embodiment 6 of the present invention;

FIG. 7 is a schematic flowchart of a service processing method according to Embodiment 7 of the present invention;

8 is a schematic flowchart of a service processing method according to Embodiment 8 of the present invention;

FIG. 9 is a schematic structural diagram of an interworking function network element according to Embodiment 9 of the present invention;

10 is a schematic structural diagram of another interworking function network element according to Embodiment 10 of the present invention; FIG. 11 is a schematic structural diagram of still another interworking function network element according to Embodiment 11 of the present invention; FIG. 12 is a schematic structural diagram of another interworking function network element according to Embodiment 12 of the present invention; FIG. 14 is a schematic structural diagram of another mobility function network element according to Embodiment 14. FIG. 14 is a schematic structural diagram of a mobility management network element according to Embodiment 14 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 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 those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

FIG. 1 is a schematic flowchart of a method for processing a location update according to Embodiment 1 of the present invention. As shown in FIG. 1A, the method for processing a location update in this embodiment may include the following steps:

Step 101: The IWF obtains the CSFB information, where the CSFB information includes the MSC/VLR information. In this embodiment, the CSFB information may include the MSC/VLR information, and the specific implementation may include: the CSFB information includes only the MSC/VLR information, or The CSFB information includes the MSC/VLR information and the CSFB type identifier.

Step 102: The IWF learns that the type of the CSFB of the UE is Gs CSFB according to the CSFB information.

In the embodiment of the present invention, the type of the CSFB may include: transmitting a short message (SMS Over SGs only, SMS-only) through the SGs interface, or transmitting a short message through the SGs interface and CSFB through the Gs interface (Gs CSFB and SMS) Over SGs, abbreviated as Gs CSFB, the embodiment of the present invention does not limit the name of the CSFB type. For example, the above Gs CSFB may also be referred to as Gs CSFB and SMS over SGs.

In the embodiment of the present invention, the CSFB type identifier may include Gs CSFB (ie, the type corresponding to CSFB is Gs CSFB), or may include SMS-only (ie, the type corresponding to CSFB is SMS-only). The embodiment of the present invention does not enter the name of the CSFB type identifier. Line limit. In the embodiment of the present invention, the MSC/VLR information may include at least one of an MSC address (MSC Address) and a VLR number (VLR Number). The MSC/VLR is an MSC/VLR that performs CSFB service through a Gs interface.

In the embodiment of the present invention, the IWF, according to the CSFB information, that the type of the CSFB of the UE is Gs CSFB may specifically include: explicitly obtaining the type of the CSFB as Gs CSFB according to the CSFB type identifier in the CSFB information, for example: if the IWF It is known that the CSFB type identifier is Gs CSFB, that is, the type of CSFB of the UE is Gs CSFB; or the type of CSFB is implicitly known as Gs CSFB according to the MSC/VLR information in the CSFB information, for example, if the IWF knows the MSC/VLR information , that is, the type of CSFB of the UE is Gs CSFB.

In this embodiment, the foregoing IWF knows that the CSFB information may specifically include:

A request message sent by the MME, where the request message carries CSFB information.

In the embodiment of the present invention, the foregoing Gs CSFB refers to transmitting a short message through the SGs interface and CSFB through the Gs interface, so as to distinguish CSFB (SGs CSFB and SMS over SGs or CSFB and SMS over SGs) by using the SGs interface in the prior art. The embodiment of the present invention is called SGs CSFB), and CSFB is implemented only through the Gs interface (referred to as Gs CSFB only in the embodiment of the present invention, in which both SMS and CS voice services require CSFB to be performed in the 2/3G network), and only the short message is transmitted via the SGs interface (SMS Over SGs only, called the SMS-only embodiment of the invention) ₀ wherein the interface message is transmitted in the above-described embodiment by embodiment SGs and Gs referred Gs interface via CSFB CSFB embodiment of the present invention If not specifically described in the embodiment of the present invention, the Gs CSFB scheme is a short message transmitted through the SGs interface and a CSFB scheme through the Gs interface.

In the embodiment of the present invention, the MME determines the type of the CSFB of the UE according to the attach request/tracking area update request message sent by the UE and the network capability (that is, whether the network supports Gs CSFB). If the type of the CSFB of the UE is Gs CSFB, the MME sends a request message carrying the CSFB information to the IWF, and sends a location update request message to the MSC/VLR.

Step 103, the IWF to the Home Location Register (HLR)

/Home Subscriber Server (HSS) transmission includes MSC/VLR Update location message for information.

In this embodiment, the sending, by the IWF, the update location message including the foregoing MSC/VLR information to the HLR/HSS may include: the IWF sending an update location message to the HLR/HSS, where the IWF sends a message for updating the location message to the HLR/HSS. The MSC/VLR information learned by the IWF from the MME (i.e., known from step 101) is included.

In this embodiment, after the HLR/HSS receives the update location message including the MSC/VLR information sent by the IWF, the HLR/HSS sends an insertion subscription data message to the IWF.

In the embodiment of the present invention, the 2/3G or 2/3G network refers to a Global System for Mobile Communications (GSM)/GSM-enhanced data rate (Enhanced Data Rate for GSM Evolution). GSM EDGE Radio Access Network (GERAN) / Universal Mobile Telecommunication System Territorial Radio Access Network (UTRAN), also known as UTRAN GERAN/UTRAN.

FIG. 1B is a schematic diagram of a network architecture based on a method for processing a location update according to Embodiment 1 of the present invention. As shown in FIG. 1B, in the foregoing network architecture, an MME is connected to an MSC/VLR through a traditional Gs interface. The CSFB service is provided for the UE's CS voice service; on the other hand, it is connected to the I WF through the SGs interface (the network architecture of the embodiment of the present invention has a slight modification to the SGs interface, and thus may also be referred to as an SGs' interface), which is the UE's Short message service.

Under the above network architecture, the embodiment of the present invention uses the Gs CSFB UE (that is, the CSFB type Gs CSFB UE), and the MME simultaneously updates the location to the MSC/VLR and the IWF, but the HLR/HSS only stores the MSC/VLR. location information. On the one hand, the MME connects to the MSC/VLR through the Gs interface to provide the CSFB service, so that the CS voice service is processed by the CSFB to the 2/3G network. On the other hand, the MME connects to the IWF through the SGs interface for short message service (Short Message Service, Referred to as SMS) business processing, enabling SMS to be directly in the EPS network Completed in the middle. In the embodiment of the present invention, the CSFB type of the UE that uses only the SMS is SMS-only, and the MME only updates the location to the IWF. The IWF that uses the SGs interface to connect directly completes the SMS in the EPS network.

The specific product form of the IWF may be an MSC/VLR. In the embodiment of the present invention, the MSC/VLR is distinguished from the Gs interface, and is therefore called an IWF. In the embodiment of the present invention, the IWF may also be referred to as an SMS IWF, or as an SMS MSC/VLR, or as an SGs MSC/VLR, or as an IWF/STP. The specific name is not limited.

In this embodiment, for a UE of the CSFB type Gs CSFB, the MME is simultaneously registered in the MSC/VLR and the IWF, and the IWF sends an update location message including the MSC/VLR information to the HLR/HSS, so that only the HLR/HSS is in the HLR/HSS. The MSC/VLR location information is stored, which facilitates the downlink service, so that the service can be completed without upgrading all the MSCs/VLRs in the existing network, so that the CSFB service can be implemented by using the original MSC/VLR, and the SMS is upgraded by using a small number of IWFs. Reduced operating costs.

FIG. 2A is a schematic flowchart of another method for processing location update according to Embodiment 2 of the present invention. As shown in FIG. 2A, the method for processing location update in this embodiment may include the following steps: Step 201 and IWF obtain CSFB information. According to the CSFB information, it is known that the type of the CSFB of the UE is Gs CSFB; or the IWF receives the request message sent by the MME that does not carry the SMS-only indication;

In the embodiment of the present invention, the type of the CSFB may include: transmitting a short message (SMS Over SGs only, SMS-only) through the SGs interface, or transmitting a short message through the SGs interface and CSFB through the Gs interface (Gs CSFB and SMS) Over SGs, abbreviated as Gs CSFB) _0, wherein the embodiment of the present invention does not limit the name of the CSFB type, for example: the above Gs CSFB may also be referred to as Gs CSFB and SMS over SGs.

In this embodiment, the type of the CSFB of the UE that is known to be the Gs CSFB may include: the IWF acquires the CSFB information, and the CSFB information includes the MSC/VLR information. The IWF learns that the type of the CSFB of the UE is Gs CSFB according to the CSFB information; or the IWF acquires the CSFB information, and the IWF learns that the type of the CSFB of the UE is Gs CSFB according to the CSFB information; or the IWF receives the un carried by the MME. The SMS-only indicates the request message, and the IWF learns that the type of the CSFB of the UE is Gs CSFB according to the request message.

In this embodiment, the CSFB information may include at least one of MSC/VLR information and a CSFB type identifier. The specific implementation may include: the foregoing CSFB information includes only MSC/VLR information, or the CSFB information includes MSC/VLR information. And the CSFB type identifier, or the CSFB information described above only includes the CSFB type identifier. For the description of the CSFB type identifier and the description of the MSC/VLR information, refer to the related content in the first embodiment of the present invention.

In the embodiment of the present invention, the determining that the type of the CSFB of the UE is Gs CSFB according to the CSFB information may include: explicitly obtaining the type of the CSFB as Gs CSFB according to the CSFB type identifier in the CSFB information, for example: if the IWF is known The CSFB type identifier is Gs CSFB, which means that the CSFB type of the UE is Gs CSFB; or the type of CSFB is implicitly known as Gs CSFB according to the MSC/VLR information in the CSFB information, for example: If the IWF knows the MSC/VLR information, That is, the type of CSFB of the UE is Gs CSFB.

In the embodiment of the present invention, the IWF, according to the request message, that the type of the CSFB of the UE is Gs CSFB may include: the IWF implicitly knows that the type of the CSFB is Gs CSFB according to the request message not carrying the SMS-only indication, for example, If the request message does not carry the SMS-only indication, it means that the type of the CSFB of the UE is Gs CSFB (or vice versa, if the request message carries the SMS-only indication, the type of the CSFB of the UE is SMS-only).

In this embodiment, the acquiring, by the IWF, the CSFB information may include: the IWF receiving the request message sent by the MME, where the request message carries the CSFB information.

For the description of the foregoing Gs CSFB, refer to the related content in the first embodiment of the present invention. In the embodiment of the present invention, the short message sent by the SGS interface and the CSFB scheme by the Gs interface are referred to as the Gs CSFB scheme, and the special embodiment of the present invention is not specifically described. Therefore, the Gs CSFB scheme is to pass the short message through the SGs interface and the CSFB scheme through the Gs interface. In the embodiment of the present invention, the MME determines the type of the CSFB of the UE according to the attach request/tracking area update request message sent by the UE and the network capability (that is, whether the network supports Gs CSFB). If the type of the CSFB of the UE is Gs CSFB, the MME sends a request message carrying the CSFB information to the IWF, and sends a location update request message to the MSC/VLR.

Step 202: The IWF sends an accept message to the MME, where the MME sends a location update request message to the MSC/VLR, and the MSC/VLR sends an update location message to the HLR/HSS.

In this embodiment, the sending, by the MSC/VLR, the update location message to the HLR/HSS may include: sending, by the MSC/VLR, the update location message directly to the HLR/HSS (ie, not passing the IWF); or, the MSC /VLR sends an update location message to the IWF, and the IWF sends the update location message to the HLR/HSS (ie, the MSC/VLR sends the update location message to the HLR/HSS via the IWF). The network entity (for example, the MSC/VLR) in the network architecture in this embodiment may be configured by routing, so that the update location message sent by the MSC/VLR is sent to the HLR through the IWF through the SS7 routing. /HSS.

In this embodiment, after the MSC/VLR sends an update location message to the HLR/HSS, including the MSC/VLR sending the update location message to the IWF by using the IWF, the MSC/VLR may further include: sending, by the HLR/HSS, the IWF to the IWF. Inserting the subscription data message, the IWF acquires the subscription data carried in the insertion subscription data message, and the IWF sends the insertion subscription data message to the MSC/VLR. The network entity (for example, the foregoing HLR/HSS) in the network architecture in this embodiment may be configured by routing, so that the insertion subscription data message sent by the HLR/HSS is sent to the foregoing through the IWF through the SS7 routing. MSC/VLR.

For the description of the foregoing 2/3G or 2/3G network or GERAN/UTRAN, refer to the related content in Embodiment 1 in the embodiment of the present invention.

FIG. 2B is a schematic diagram of a network architecture based on another method for processing a location update according to Embodiment 2 of the present invention. As shown in FIG. 2B, in the foregoing network architecture, an MME—a traditional Gs is adopted. The interface is connected to the MSC/VLR, and provides the CSFB service for the UE's CS voice service. On the other hand, the SGs interface is connected to the I WF. (The network architecture of the embodiment of the present invention has a slight modification to the SGs interface, so it may also be called SGs. 'interface', provides services for short messages of the UE.

Under the above network architecture, the embodiment of the present invention uses the Gs CSFB UE (that is, the CSFB type Gs CSFB UE), and the MME simultaneously updates the location to the MSC/VLR and the IWF, but the HLR/HSS only stores the MSC/VLR. location information. On the one hand, the MME connects to the MSC/VLR through the Gs interface to provide the CSFB service, so that the CS voice service is processed by the CSFB to the 2/3G network. On the other hand, the MME connects to the IWF through the SGs interface for short message service (Short Message Service, Referred to as SMS) business processing, so that SMS can be completed directly in the EPS network. In the embodiment of the present invention, the CSFB type of the UE that uses only the SMS is SMS-only, and the MME only updates the location to the IWF, and the MME that the MME uses the SGs interface directly completes the SMS on the EPS network.

The specific product form of the IWF may be an MSC/VLR. In the embodiment of the present invention, in order to distinguish from the existing products (for example, the MSC/VLR connected to the Gs interface), it is called an IWF. In the embodiment of the present invention, the IWF may also be referred to as an SMS IWF, or as an SMS MSC/VLR, or as an SGs MSC/VLR, or as an IWF/STP. The specific name is not limited.

In the embodiment of the present invention, the IWF has a Signaling Transfer Point (STP) function, so the product form can be combined with an STP or a Signaling Gateway (SG). The embodiments of the invention are not limited. The network entity in the network architecture in this embodiment (for example: through HLR/HSS, and MSC/VLR) ensures that the signaling sent by the HLR/HSS to the MSC/VLR is signaled by the IWF through the routing configuration, and the MSC/ The signaling sent by the VLR to the HLR/HSS is signaled by the IWF. The relevant protocol stack is shown in Figure 2C.

The specific implementation is as follows: In the above network architecture, the Signaling System 7, SS7 network between the HLR/HSS and the MSC/VLR is configured to pass through the IWF, and the above IWF is used as The signaling transfer point connects the MSC/VLR and the MSC/VLR, so that the IWF can forward uplink and downlink signaling between the HLR/HSS and the MSC/VLR. For example: In this architecture, if the IWF is configured as the signaling transfer point between the MSC/VLR and the HLR/HSS in the MSC/VLR, in the attach process or the tracking area update process, the MME updates to the MSC through the Gs interface location. VLR, the foregoing MSC/VLR may send an update location message or an insertion subscription data message response message to the HLR/HSS through the IWF through the SS7 routing; or, if the IWF is configured as an MSC/VLR and HLR in the HLR/HSS The signaling transfer point between the /HSS, the HLR/HSS may send the insertion subscription data message or the update location response message to the MSC/VLR through the IWF according to the configured signaling signaling information of the seventh.

In this embodiment, the specific network entity routing configuration may include: HLR/HSS configuration

The IWF acts as a signaling transfer point between the MSC/VLR and the HLR/HSS, and the MSC/VLR configures the IWF as a signaling transfer point between the MSC/VLR and the HLR/HSS; or, only the HLR/HSS is configured with the IWF as the MSC. Signaling transfer point between /VLR and HLR/HSS.

In this embodiment, for the UE of the CSFB type Gs CSFB, the MME is simultaneously registered in the MSC/VLR and the IWF, and the IWF receives the request message of the MME to learn that the type of the CSFB of the UE is Gs CSFB, and the IWF sends an acceptance to the MME. The MME sends a location update request message to the MSC/VLR, and the MSC/VLR sends an update location message to the HLR/HSS, so that only the MSC/VLR location information is stored in the HLR/HSS, which facilitates the downlink service, so that the upgrade does not need to be performed. All MSCs/VLRs in the current network can complete the service, so that the CSFB service can be realized by using the original MSC/VLR, and the SMS is upgraded by using a small number of IWFs, thereby reducing the operation cost.

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

Step 301: The IWF learns that the type of the CSFB of the UE is Gs CSFB;

Step 302: If the IWF receives the short message sent by the SMS-GMSC, the IWF sends a paging message to the MME. If the IWF receives the initial address message sent by the GMSC, the IWF sends The MSC/VLR sends the above initial address message.

In the embodiment of the present invention, the sequence of the short message sent by the IWF receiving the SMS-GMSC and the initial address message sent by the IWF receiving the GMSC is not limited, and the type of the CSFB of the IWF learned UE is not limited to Gs CSFB and the foregoing. The sequence of the short messages sent by the IWF SMS-GMSC, and the order in which the IWF knows that the CSFB of the UE is the Gs CSFB and the IWF receives the initial address message sent by the GMSC.

In this embodiment, the IWF knows that the type of the CSFB of the UE is the Gs CSFB, and the information may include: the IWF acquires the CSFB information, and the CSFB information includes the MSC/VLR information, and the IWF learns that the CSFB type of the UE is based on the CSFB information. The IWF obtains the CSFB information, and the IWF learns that the type of the CSFB of the UE is Gs CSFB according to the CSFB information; or the IWF receives the request message sent by the MME that does not carry the SMS-only indication, and the IWF is according to the request. The message learns that the CSFB type of the UE is Gs CSFB.

In the embodiment of the present invention, the IWF, according to the request message, that the type of the CSFB of the UE is Gs CSFB may include: implicitly knowing that the type of the CSFB is Gs CSFB according to the request message not carrying the SMS-only indication, for example: If the request message does not carry the SMS-only indication, it indicates that the type of the CSFB of the UE is Gs CSFB (or vice versa, if the request message carries an SMS-only indication, the type of the CSFB of the UE is SMS-only).

In the embodiment of the present invention, the description of the type of the CSFB, the description of the foregoing CSFB type identifier, and the description of the MSC/VLR information may be referred to the phase in the first embodiment of the present invention. Close content. In this embodiment, the acquiring, by the IWF, the CSFB information may include: the IWF receiving the request message sent by the MME, where the request message carries the CSFB information.

For the description of the foregoing Gs CSFB, refer to the related content in the first embodiment of the present invention. In the embodiment of the present invention, the MME determines the type of the CSFB of the UE according to the attach request/tracking area update request message sent by the UE and the network capability (that is, whether the network supports Gs CSFB). If the type of the CSFB is Gs CSFB, the MME not only sends a request message carrying the CSFB information to the IWF, but the MME sends a location update request message to the MSC/VLR.

In this embodiment, the IWF receives the short message sent by the SMS-GMSC, and the sending, by the IWF, the paging message to the MME may include: the IWF receiving the short message sent by the SMS-GMSC to the MSC/VLR, where the IWF is obtained. The short message, the IWF sends a paging message to the MME (ie, the SMS-GMSC sends a short message to the MSC/VLR through the IWF, the IWF intercepts the short message sent by the SMS-GMSC, and the IWF sends a paging message to the MME. ). The network entity in the network architecture in the embodiment (for example, the foregoing SMS-GMSC) may be configured to be configured to send the short message sent by the SMS-GMSC to the MSC through the IWF through the SS7 routing. VLR.

In this embodiment, the IWF receives the initial address message sent by the GMSC, and the sending, by the IWF, the initial address message to the MSC/VLR may include: the IWF receiving an initial address message sent by the GMSC to the MSC/VLR, where The IWF sends the initial address message to the MSC/VLR (that is, the GMSC sends an initial address message to the MSC/VLR through the IWF). The network entity in the network architecture in the embodiment (for example, the foregoing GMSC) can be configured to be configured to send the initial address message sent by the GMSC to the MSC/VLR through the IWF through the SS7 routing. In this embodiment, the GMSC may directly send the initial address message to the MSC/VLR (that is, the IWF does not pass through the IWF), which is not limited in this embodiment.

In the embodiment of the present invention, the foregoing 2/3G or 2/3G network or GERAN/UTRAN For a description, refer to the related content in the first embodiment.

The network architecture of the method for processing the location update provided by the third embodiment of the present invention can be referred to as FIG. 1B or 2B. In the foregoing network architecture, the MME is connected to the MSC/VLR through the traditional Gs interface, and is the CS voice service of the UE. On the other hand, the CSFB service is provided; on the other hand, the SGs interface is connected to the IWF (the network architecture of the embodiment of the present invention has a slight modification to the SGs interface, and therefore may also be referred to as an SGs' interface) to provide services for the short messages of the UE.

In the embodiment of the present invention, the IWF has a Signaling Transfer Point (STP) function, so the product form can be combined with an STP or a Signaling Gateway (SG). The embodiments of the invention are not limited. The above network architecture ensures that the signaling/data sent by the SMS-GMSC/GMSC to the MSC/VLR is signaled/data converted by the IWF through the routing configuration. A schematic diagram of the relevant protocol stack is shown in Figure 3B.

The specific implementation is as follows: In the above network architecture, SMS-GMSC/GMSC needs to be configured. The Signaling System 7, SS7 network between the MSC/VLR passes through the IWF, and the IWF is used as a signaling transfer point to connect the SMS-GMSC/GMSC with the MSC/VLR, so that the IWF can forward the HLR. Downlink signaling/data, etc. between /HSS and MSC/VLR. For example: In this architecture, if the IWF is configured as the signaling transfer point between the SMS-GMSC and the MSC/VLR in the SMS-GMSC, in the downlink SMS (ie MT SMS) process, the above SMS-GMSC passes the seventh letter. Let the route send the short message destined for the MSC/VLR to the IWF, and the IWF sends a paging message to the MME; if the IWF is configured as the signaling transfer point between the GMSC and the MSC/VLR, the downlink voice is In the call (ie, MT Call) process, the GMSC sends an initial address message to the MSC/VLR through the IWF according to the configured signaling signaling information of the seventh.

In this embodiment, the specific network entity routing configuration may include: the SMS-GMSC is configured with the IWF as a signaling transfer point between the MSC/VLR and the SMS-GMSC, and the GMSC is configured with the IWF as the MSC/VLR and the GMSC. The signaling transfer point; or, only the SMS-GMSC configures the IWF as the signaling transfer point between the MSC/VLR and the SMS-GMSC.

In this embodiment, for a UE of the CSFB type Gs CSFB, the MME is simultaneously registered in the MSC/VLR and the IWF. If the downlink SMS is performed, the IWF intercepts the short message sent by the SMS-GMSC to the MSC/VLR, and sends the short message. The paging message is sent to the MME. If a downlink voice call is made, the GMSC sends an initial address message to the MSC/VLR, so that the short message service can be directly completed by the IWF supporting the SGs interface in the EPS network and utilizes the original MSC of the Gs interface. The /VLR implements the CSFB service, which enables the service to be completed without upgrading all the MSCs/VLRs in the existing network. Therefore, the CSFB service can be implemented by using the original MSC/VLR, and the SMS is upgraded by using a small number of IWFs, thereby reducing the operation cost.

4 is a schematic flowchart of a method for processing a location update according to Embodiment 4 of the present invention. This embodiment may include an MME performing an IWF location update process (ie, steps 403 to 405) through an SGs interface, and/or a Gs interface. The MSC/VLR location update process (ie, steps 406 to 408) is performed, and the execution sequence of the IWF location update process and the MSC/VLR location update process is not limited. Where, for the UE using the Gs CSFB service (that is, the CSFB type is Gs CSFB ), the MME The IWF location update procedure and the MSC/VLR location update procedure will be performed; for UEs that only use SMS (ie, CSFB type is SMS-only), the MME will only perform the IWF location update procedure. As shown in FIG. 4, the processing method of the location update in this embodiment may include the following steps:

Step 401: The UE sends an attach request (Attach Request) message/TAU Request message (TAU Request) message to the MME, where the attach type of the attach request message indicates that it is a combined EPS/IMSI attach Request or the tracking area. The update type of the update request message indicates that it is a Combined Tracking Area/Location Area Update Request, a Joint Tracking Area/Location Area Update, and an International Mobile Subscriber Identity Attach Request (combined Tracking Area/Location Area Update) With IMSI attach Request );

Step 402: Perform a partial process of a packet domain attach/tracking area update process;

If the attach request message/tracking area update request message in step 401 carries the "SMS-only" indication, or the network only supports the delivery of the short message through the SGs interface, only the SMS is provided for the UE (that is, the CSFB type is SMS- Only step 205 is executed directly, and step 203 to step 405 are not executed; otherwise, the Gs CSFB service is provided for the UE (ie, the type of CSFB is Gs CSFB), and step 403 is performed.

Step 403: The MME sends a location update request (Location Update Request) message to the MSC/VLR.

Step 404: The MSC/VLR performs a location update process of the CS domain (CS Domain); the specific implementation is as follows: (ie, steps 404a to 404Π)

Step 404a: The MSC/VLR sends an update location (Update Location) message to the HLR/HSS.

Step 404b: The HLR/HSS sends a Cancel Location message to the source MSC/VLR (ie, Old MSC/VLR) or the source IWF (ie, Old IWF).

Step 404c, the source MSC/VLR or the source IWF sends a cancel location to the HLR/HSS ^ (Cancel

Location Ack) message; Step 404d: The HLR/HSS sends an Insert Subscriber Data message to the MSC/VLR.

Step 404e: The MSC/VLR sends an Insert Subscriber Data Ack message to the HLR/HSS.

Step 404f: The HLR/HSS sends an Update Location Ack message to the MSC/VLR.

Step 405: The MSC/VLR returns a Location Update Accept message to the MME.

Step 406: The MME sends a request message to the IWF, where the request message carries the CSFB information. In this step, the description of the CSFB information may be related to the content in the first embodiment of the present invention, and details are not described herein. For the description of the CSFB type identifier and the MSC/VLR information that may be included in the CSFB information, refer to related content in the first embodiment of the present invention.

In this step, the specific implementation of the CSFB information carried in the request message sent by the MME may include:

If SMS is only provided for the UE, that is, the MME decides to provide SMS only for the UE (ie, the type of CSFB is SMS-only):

1. The request message sent by the MME carries an "SMS-only" indication (the indication may be a CSFB type identifier), and the display indicates that the type of CSFB is SMS-only; or

2. The request message sent by the MME does not carry any CSFB type identifier and MSC/VLR information, and implicitly indicates that the CSFB type is SMS-only.

If the UE is provided with the Gs CSFB monthly service, that is, the MME decides to provide the UE with the Gs CSFB monthly service (that is, the CSFB type is Gs CSFB ):

The request message sent by the MME carries the "Gs CSFB" indication (the indication may be a CSFB type identifier) and the MSC/VLR information, and the display indicates that the type of the CSFB is Gs CSFB; or 2, the request message sent by the MME carries only the MSC. /VLR information, implicitly indicating that the type of CSFB is Gs CSFB; or The foregoing request message in this step may be an extended location update request (Location Update Request) message, or may be a new CSFB Location Update Request message, which is not limited by the embodiment of the present invention. .

Step 407: The IWF performs a location update process of the CS domain.

The specific implementation is as follows: (ie, step 407a~step 407Π

Step 407a: The IWF sends an Update Location message to the HLR/HSS. (1) If the IWF learns that the UE uses the Gs CSFB service (that is, the CSFB type is Gs CSFB), the IWF sends an update message to the HLR/HSS. The location update information carried is MSC/VLR information, and the MSC/VLR information is obtained from the request message sent by the MME (ie, step 406);

(2) If the IWF learns that the UE only uses the SMS (that is, the CSFB type is SMS-only), the location update information carried in the update message sent by the IWF to the HLR/HSS is IWF information, for example: configured for the IWF. MSC address and VLR number, etc.

Step 407b: The HLR/HSS sends a Cancel Location message to the source MSC/VLR or the source IWF.

This step is an optional step. If the location update information included in the update message received by the HLR/HSS in this step is different from the source MSC/VLR information or the source IWF information stored in the HLR/HSS, the HLR/HSS executes the present The step is to send a cancel location message to the source MSC/VLR or the source IWF. Otherwise, the HLR/HSS does not perform the step, that is, does not trigger sending a cancel location message to the source MSC/VLR or the source IWF.

Step 407c: The source MSC/VLR or the source IWF sends a Cancel Location Ack message to the HLR/HSS.

Step 407d: The HLR/HSS sends an Insert Subscriber Data message to the IWF.

If the HLR/HSS receives the update location message carrying the MSC/VLR information sent by the IWF, the HLR/HSS needs to send the insertion subscription data message to the IWF.

Step 407e: The IWF sends an Insert Subscriber Data Ack message to the HLR/HSS. Step 407f: The HLR/HSS sends an Update Location Ack message to the IWF.

Step 408: The IWF returns an accept message to the MME.

The above accept message in this step may be an existing Location Update Accept message, or may be an extended Location Update Accept message, or may be a new CSFB location update accept ( The CSFB Location Update Accept message is not limited in this embodiment of the present invention.

Step 409: Perform a remaining process of the packet domain attach/tracking area update process;

Step 410: The MME returns an Attach Accept message/TAU Accept message to the UE.

FIG. 5 is a schematic flowchart of another method for processing location update according to Embodiment 5 of the present invention. The embodiment may include the MME performing an IWF location update process through an SGs interface and/or performing an MSC/VLR location update process through a Gs interface. For the UE using the Gs CSFB service (that is, the type of CSFB is Gs CSFB), the MME will perform the IWF location update procedure and the MSC/VLR location update procedure; for UEs that only use SMS (that is, CSFB type is SMS-only) The MME will only perform the IWF location update process. In this embodiment, the SS7 network between the HLR/HSS and the MSC/VLR needs to be configured to pass the IWF, and the IWF can forward signaling such as an update location message and an insertion subscription data message between the HLR/HSS and the MSC/VLR. As shown in FIG. 5, the service processing method in this embodiment may include the following steps:

Step 501: The UE sends an attach request (Attach Request) message/tracking area update to the MME. A request (TAU Request) message, the attachment type of the above attachment request message indicates that it is a combined attachment request (combined EPS/IMSI attach Request) or the update type of the tracking area update request message indicates that it is a joint tracking area/location area update request ( Combined Tracking Area/Location Area Update Request), Combined Tracking Area/Location Area Update with IMSI attach Request;

Step 502: Perform a partial process of a packet domain attach/tracking area update process;

Step 503a: The MME sends a request message to the IWF, where the request message carries the CSFB information. In this step, the description of the CSFB information may be related to the content in the second embodiment of the present invention, and details are not described herein again. For the description of the CSFB type identifier and the MSC/VLR information that may be included in the CSFB information, refer to the related content in the second embodiment of the present invention.

If the UE is provided with the Gs CSFB monthly service, the MME decides to provide the UE with the Gs CSFB monthly service.

(ie when the type of CSFB is Gs CSFB ):

1. The request message sent by the MME carries the "Gs CSFB" indication (the indication can be a CSFB type identifier) and the MSC/VLR information, and the display indicates that the type of CSFB is Gs CSFB; or

2. The request message sent by the MME only carries the MSC/VLR information, and implicitly indicates that the type of CSFB is Gs CSFB; or

3. The request message sent by the MME carries only the "Gs CSFB" indication (the indication may be CSFB type identification), the display indicates that the type of CSFB is Gs CSFB; or

4. The request message sent by the MME does not carry any CSFB type identifier and MSC/VLR information (for example, does not carry the "SMS-only" indication), and implicitly indicates that the CSFB type is SGs CSFB.

Based on the type of CSFB known above, the IWF can perform different steps:

If the type of CSFB above is SMS-only, then step 505a is directly executed (ie, IWF direction)

The HLR/HSS sends an update location message), step 504 is not performed, and step 503b is performed at step 505f (ie, the HLR/HSS sends an update location response message to the IWF);

If the type of CSFB described above is Gs CSFB, step 503b is executed.

The foregoing request message in this step may be an extended location update request (Location Update Request) message, or may be a new CSFB Location Update Request message, which is not limited by the embodiment of the present invention. .

Step 503b: The IWF returns an accept message to the MME.

For the UE of the CSFB type SMS-only, the step 503b is performed after the step 503a; for the CSFB type UE of the Gs CSFB, the step 503b is executed after the step 505f.

Step 504: The MME sends a location update request to the MSC/VLR (Location Update

Request ) message

Step 505: The MSC/VLR or the IWF performs a location update process of the CS domain (CS Domain); the specific implementation is as follows: (ie, steps 505a to 505f)

Step 505a, the MSC/VLR or the IWF sends an Update Location message to the HLR/HSS;

If the UE only uses SMS, that is, the CSFB type of the UE is SMS-only, then in step 503a After the IWF performs step 505a, the IWF carries the IWF information (for example, at least one of the MSC address corresponding to the IWF and the VLR number) in the update location message to the HLR/HSS; if the UE uses the Gs CSFB service, That is, the UE's CSFB type Gs CSFB, after the step 504, the MSC/VLR performs step 505a, and the MSC/VLR sends an update location message to the HLR/HSS. The sending, by the MSC/VLR, the update location message to the HLR/HSS may include: the MSC/VLR directly sending the update location message to the HLR/HSS (ie, not passing the IWF); or the MSC/VLR to the IWF. Sending an update location message, the IWF sends the update location message to the HLR/HSS (ie, the MSC/VLR sends the update location message to the HLR/HSS via the IWF). The network entity (for example, the MSC/VLR) in the network architecture in this embodiment may be configured to be configured to send the update location message sent by the MSC/VLR to the HLR through the IWF through the SS7 routing. /HSS.

When the MSC/VLR sends the update location message to the HLR/HSS through the IWF (that is, the update location message sent by the MSC/VLR to the HLR/HSS is sent to the IWF according to the SS7 routing configuration, the IWF will The update location message is forwarded to the HLR/HSS. The IWF can also learn the CSFB information of the UE from the update location message sent by the MSC/VLR. For example, only the type of the CSFB of the UE is known in step 503a. Step 505a acquires the information of the MSC/VLR (for example, the MSC address of the MSC/VLR).

Step 505b: The HLR/HSS sends a Cancel Location message to the source MSC/VLR (ie, Old MSC/VLR) or the source IWF (ie, Old IWF).

This step is an optional step. For details, refer to related content in Embodiment 4 of the present invention. Step 505c: The source MSC/VLR or the source IWF returns a Cancel Location Ack message to the HLR/HSS.

Step 505d: The HLR/HSS sends an Insert Subscriber Data message to the MSC/VLR or the IWF.

If the UE uses the Gs CSFB monthly service (that is, the CSFB type is Gs CSFB), the HLR/HSS receives the update location message carrying the MSC/VLR information sent by the MSC/VLR. The HLR/HSS transmits an Insert Contract Data message to the MSC/VLR through the IWF. At this time, the network element IWF between the HLR/HSS and the MSC/VLR can receive the HLR/HSS and send it to the HLR/HSS.

The subscription data of the UE of the MSC/VLR, the IWF may acquire and store the subscription data of the UE, and then send the insertion subscription data message to the MSC/VLR. The network entity (for example, the foregoing HLR/HSS) in the network architecture in this embodiment may be configured by routing, so that the insertion subscription data message sent by the HLR/HSS is sent to the foregoing through the IWF through the SS7 routing. MSC/VLR.

If the IWF learns that the UE only uses the SMS (that is, the type of the CSFB is SMS-only), the HLR/HSS receives the update location message carrying the IWF information sent by the IWF, and the HLR/HSS sends the subscription data message to the IWF.

If the IWF does not know the type of the CSFB (that is, the request message sent by the MME is not received, and the MME only performs location update on the MSC/VLR through the Gs interface, for example, the UE is in the 2/3G network), the IWF directly forwards the message. The subscription data sent by the HLR/HSS to the MSC/VLR does not itself acquire the subscription data of the UE.

Step 505e, MSC/VLR or IWF returns an insertion subscription data response to the HLR/HSS (Insert

Subscriber Data Ack) message;

Step 505f: The HLR/HSS sends a Location Update Answer (Update Location Ack) message to the MSC/VLR or the IWF.

For the IWF to know that the CSFB type is SMS-only, then step 503b is performed (step 507 is performed directly, and step 506 is not executed), and the IWF sends an accept message to the MME; for the IWF, the CSFB type is Gs CSFB or the above CSFB is unknown. The type, at this time, the HLR/HSS sends a location update response message to the MSC/VLR through the IWF, and then step 506 is performed.

Step 506: The MSC/VLR returns a Location Update Accept message to the MME.

Step 507: Perform a remaining process of the packet domain attach/tracking area update process;

Step 508: The MME returns an Attach Accept message to the UE. Accept ) message.

FIG. 6 is a schematic flowchart of a service processing method according to Embodiment 6 of the present invention. This embodiment is applicable to a downlink SMS process. As shown in FIG. 6, the service processing method in this embodiment may include the following steps:

Step 601: The SMS-GMSC receives the SMS message sent by the Service Center (SC):

Step 602: Send a routing information (SRI) process, the SMS-GMSC acquires downlink routing information of the target UE. Step 603: The SMS-GMSC sends the foregoing SMS message to the IWF according to the routing configuration information. (1) For the case where the UE only uses the SMS (that is, the type of the CSFB is SMS-only), the SMS-GMSC obtains the IWF information from the HLR/HSS, and the destination address of the SMS message sent by the UE is the IWF. Then, the IWF can be executed according to the following steps 404 to 409;

(2) For the case where the UE uses the Gs CSFB service (ie, the type of CSFB is Gs CSFB), the SMS-GMSC obtains the MSC/VLR information from the HLR/HSS, and the destination address of the above SMS message sent by the UE is the MSC. /VLR, the network element IWF between the SMS-GMSC and the MSC/VLR receives the above message sent by the SMS-GMSC to the MSC/VLR, and the IWF detects that the currently received message is an SMS message, according to the following Step 404 to step 409 are performed, instead of forwarding the short message to the MSC/VLR according to the locally configured routing table information. The network entity (for example, the above-mentioned SMS-GMSC) in the network architecture may be configured by routing so that the short message sent by the SS-GMSC to the MSC/VLR through the SS7 routing will pass through the IWF.

(3) If there is no CSFB type of the UE in the IWF, that is, the UE is only updated on the MSC/VLR through the Gs interface location, for example: the UE is in the 2/3G network to perform the CS service, and the SMS-GMSC is obtained from the HLR/HSS. The above MSC/VLR information is sent to the MSC/VLR, and the IWF directly forwards the SMS message sent by the SMS-GMSC to the MSC/VLR according to the locally configured routing table information, and receives the MSC/VLR. The MSC/VLR to the above SMS message performs a standard circuit domain short message processing flow, which will not be described here.

Step 604: The IWF sends a paging request (Paging Request) message to the MME, where the paging request message indicates that the message is an SMS page.

Step 605: The MME sends a paging (Paging) message to an Evolved Node B (eNodeB).

Step 606: The eNodeB sends a paging (Paging) message to the UE.

Step 607: The U E establishes an RRC connection, and sends a Service Request message to the MM E through the eNodeB.

Step 608: The MME sends a Service Request message to the IWF, so that the IWF stops retransmitting the paging message.

Step 609: The MME sends an Initial UE Context Setup message to the eNodeB.

Step 610: The eNodeB sends an initial UE context setup response (Initial UE Context Setup Response) message to the MME.

Step 611: The IWF constructs an SMS message, and sends the foregoing SMS message to the MME by using a downlink unit data (Downlink Unitdata) message.

Step 612: The MME encapsulates the SMS message in the NAS message, and sends a Downlink NAS Transport message to the UE. Step 613: Perform a subsequent MT SMS follow-up process.

In this embodiment, after receiving the SMS message sent by the SMS-GMSC, the IWF sends a paging message to the MME according to the type of the learned CSFB, and uses an upgraded IWF to perform SMS so that the SMS can pass the IWF supporting the SGs interface in the EPS. The network is directly completed, which improves the user's SMS experience and reduces operating costs.

FIG. 7 is a schematic flowchart of a service processing method according to Embodiment 7 of the present invention. This embodiment is applicable to a downlink voice call process. As shown in FIG. 7, the service processing method in this embodiment may include the following steps:

Step 701: The GMSC receives an initial address message (initial address message, referred to as ΙΑΜ); Step 702: Send a routing information (SRI) process, and obtain, by the GMSC, downlink routing information of the target UE.

Step 703: The GMSC sends an IAM to the MSC/VLR or the IWF.

If the type of the CSFB of the UE is Gs CSFB, the GMSC obtains the MSC/VLR information from the HLR/HSS, and the IAM destination address sent by the GMSC is the MSC/VLR, and the IWF can follow the following steps 704~ Step 714: If the type of the CSFB of the UE is SMS-only, and the GMSC obtains the IWF information from the HLR/HSS, the GMSC sends an IAM to the IWF, and the steps 704 to 705 are triggered. The type of the CSFB of the UE (that is, the UE is updated on the MSC/VLR only through the Gs interface location, for example, the UE is in the 2/3G network to perform the CS service), and the GMSC obtains the MSC/VLR information from the HLR/HSS. The above-mentioned IAM destination address that is sent is the MSC/VLR, and the MSC/VLR after receiving the above IAM performs the standard circuit domain voice call processing procedure, which is not described here.

In this embodiment, the sending, by the GMSC, the IAM to the MSC/VLRGMSC may include: the GMSC directly sends the IAM to the MSC/VLR, or the GMSC may send the IAM to the MSC/VLR through the IWF. The sending, by the IGW, the IMF to the MSC/VLR by using the IWF may include: receiving, by the IWF, an initial address message sent by the GMSC to the MSC/VLR, where the IWF sends the initial address message to the MSC/VLR. Wherein, the network in this embodiment The network entity (for example, the above-mentioned GMSC) can be configured by routing, so that the initial address message sent by the GMSC is sent to the MSC/VLR through the IWF through the SS7 routing.

Step 704: The MSC/VLR or the IWF sends a paging request (Paging Request) message to the MME.

The MME determines whether the "SMS-only" indication is returned to the UE in the joint attach or joint update procedure (ie, whether the type of the CSFB is SMS-only), and if so, only step 605 is performed (subsequent steps 706-714 are not performed); Otherwise, step 706 is directly executed (step 705 is not performed);

Step 705: The MME sends a Paging Reject message to the IWF to stop the CS paging and the CSFB process.

Step 706: The MME sends a paging (Paging) message to the eNodeB.

Step 707: The eNodeB sends a paging (Paging) message to the UE.

Step 708: The UE establishes a Radio Resource Control (RRC) connection, and sends an Extended Service Request message to the MME, where the service request message carries a CSFB indication.

Step 709: The MME sends a Service Request message to the MSC/VLR, so that the MSC/VLR stops retransmitting the paging message.

Step 710: The MME sends an Initial UE Context Setup or a UE CONTEXT MODIFICATION REQUEST message to the eNodeB, where the initial UE context setup message or the UE context modification request message carries a CSFB indication.

Step 711: The eNodeB sends an Initial UE Context Setup Response message or a UE CONTEXT MODIFICATION RESPONSE message to the MME.

Step 712a: The MME sends a disconnection indication message to the IWF.

The above disconnection indication message sent by the MME to the IWF in this step may be an extended IMSI score. The IMSI Detach Indication message, or a new Disconnect indication message, is not limited in this solution. The specific implementation may be as follows: (1) The above disconnection indication message is an extension. IMSI separation indication message;

For example, the IMSI separation indication message may be extended with a Disconnect SGs Connection indication, indicating that the IWF only disconnects the SGs connection of the UE, instead of initiating IMSI separation.

(2) the above disconnection indication message is a new disconnection indication message;

For example, the disconnection indication message may carry a Disconnect SGs Connection indication, instructing the IWF to disconnect the SGs of the UE.

Step 712b, the IWF disconnects the SGs interface;

Receiving the disconnection indication message, the IWF disconnects the SGs interface, and deletes the corresponding information of the UE (for example, context information and subscription data, etc.), if the UE uses the Gs CSFB service (that is, the CSFB type is Gs CSFB), The IWF is not triggered to initiate a Purge process to the HLR/HSS.

This embodiment does not limit step 712a - it is completed before step 713, that is, step 712a may be performed simultaneously with step 713, or according to the instruction of the specific message in step 713, for example: performing packet switched domain switching (PS Handover, referred to as In the process of the PS HO, the step 712a may be performed after the MME receives the Forward Relocation Complete Ack message or the Forward Relocation Response message sent by the SGSN, or the step 712a may be performed. After the MME receives the extended service request message sent by the UE in step 709, the step 712a may be performed after the MME receives the response message sent by the eNodeB.

Step 713: The eNodeB performs a process such as PS HO, Network Assisted Cell Change (NACC), or Radio Resource Control connection release (RRC connection release) to migrate the UE to 2G/3G. The internet; Step 714: After the UE sends a service request message to the MSC/VLR to establish a CS connection, the UE initiates a voice call process to the MSC/VLR, and completes the subsequent voice call process according to the response of the MSC/VLR. Praise.

In this embodiment, the GMSC sends the IAM to the MSC/VLR, and the CSFB service is implemented by using the original MSC/VLR, so that CSFB can be completed without upgrading all the MSCs/VLRs in the existing network, thereby reducing operating costs and reducing operating costs.

FIG. 8 is a schematic flowchart of a service processing method according to Embodiment 8 of the present invention. This embodiment is applicable to an uplink voice call process. As shown in FIG. 8, the service processing method in this embodiment may include the following steps:

Step 801: The UE sends an extended service request (Extended Service Request) message to the MME, where the extended service request message carries a CSFB indication.

Step 802: The MME sends an initial UE context setup message or a UE context modification request message to the eNodeB, where the initial UE context setup message or the UE context modification request message carries a CSFB indication.

Step 803: The eNodeB sends an initial UE context setup response message or a UE context tampering response message to the MME.

Step 804a: The MME sends a disconnection indication message to the IWF.

The disconnection indication message sent by the MME to the IWF in this step may be an extended IMSI Detach Indication message, or may be a new Disconnect indication message, which is not The specific implementation can be as follows: (1) The above disconnection indication message is an extended IMSI separation indication message;

For example, the IMSI separation indication message may be extended with a Disconnect SGs Connection indication, indicating that the IWF only disconnects the SGs interface connection of the UE, instead of initiating IMSI separation.

For example, the disconnection indication message can carry the disconnected SGs connection (Disconnect SGs Connection) The indication indicates that the IWF disconnects the SGs interface of the UE.

Step 804b, the IWF disconnects the SGs interface;

This embodiment does not limit step 804a - it is completed before step 805, that is, step 804a may be performed simultaneously with step 805, or according to the instruction of the specific message in step 805, for example: in the process of performing PS HO, step 804a may be After the MME receives the forwarding redirection response message sent by the SGSN, the MME performs the forwarding or forwarding of the redirection response message, or the step 804a may be performed after the MME receives the extended service request message sent by the UE, or the step 804 may be performed in the step. The 503 MME is executed after receiving the response message sent by the eNodeB.

Step 805: The eNodeB performs a process such as PS HO, NACC, or RRC connection release to migrate the UE to the 2G/3G network.

Step 806: The UE sends a service request message to the MSC/VLR under the coverage of the 2/3G network.

After the CS is connected, a voice call process is initiated to the MSC/VLR, and the subsequent voice call process is completed according to the response of the MSC/VLR, which is not mentioned here.

In this embodiment, in the CSFB process, the MME sends a disconnection indication message to the IWF, so that the IWF disconnects the SGs interface of the UE, so that the UE can initiate the MSC/VLR by using the 2/3G network coverage. The downlink voice call and the downlink short message flow ensure that the service is completed normally when the Gs CSFB scheme is in the CSFB to 2/3G network.

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 an embodiment can be referred to the related descriptions of other embodiments.

FIG. 9 is a schematic structural diagram of an interworking function network element according to Embodiment 9 of the present invention. As shown in FIG. 9, the interworking function network element in this embodiment may include a first obtaining module 91, a first learning module 92, and a first Send module 93. The first obtaining module 91 acquires CSFB information, and the CSFB information includes MSC/VLR information. The first learning module 92 learns that the CSFB type of the UE is Gs CSFB according to the CSFB information, and the first sending module 93 sends the information to the HLR/HSS. An update location message including the above MSC/VLR information.

The function of the IWF in the first embodiment of the present invention and the fourth embodiment of the present invention can be implemented by the interworking function network element provided in this embodiment.

In this embodiment, for a UE of the CSFB type Gs CSFB, the MME is simultaneously registered in the MSC/VLR and the IWF, and the first sending module sends an update location message including the MSC/VLR information to the HLR/HSS, so that the HLR/ Only the MSC/VLR location information is stored in the HSS, which facilitates the downlink service, so that all services can be completed without upgrading all the MSCs/VLRs in the existing network, so that the CSFB service can be implemented by using the original MSC/VLR, and a small number of IWFs can be upgraded. Conducting SMS reduces operating costs.

Further, the first learning module 92 in this embodiment may be specifically configured to learn, according to the MSC/VLR information in the CSFB information, that the type of the CSFB of the UE is Gs CSFB, or according to the CSFB type identifier in the CSFB information. The type of the CSFB of the UE is Gs CSFB. FIG. 10 is a schematic structural diagram of another interworking function network element according to Embodiment 10 of the present invention.

As shown in FIG. 10, the interworking function network element of this embodiment may include a second obtaining module 1001, a second learning module 1002, and a second sending module 1003. The second obtaining module 1001 obtains the CSFB information, and the second learning module 1002 learns that the CSFB type of the UE is Gs CSFB according to the CSFB information, and the second sending module 1003 sends an accept message to the MME for the MME to the MSC/VLR. A location update request message is sent for the MSC/VLR to send an update location message to the HLR/HSS. The functions of the foregoing embodiment of the present invention and the IWF in the fifth embodiment of the present invention can be implemented by the interworking function network element provided in this embodiment.

In this embodiment, for a UE of the CSFB type Gs CSFB, the MME is simultaneously registered in the MSC/VLR and the IWF, and the second learning module learns that the type of the CSFB of the UE is Gs CSFB, and the second sending module sends an acceptance to the MME. The MME sends a location update request message to the MSC/VLR, and the MSC/VLR sends an update location message to the HLR/HSS, so that only the MSC/VLR location information is stored in the HLR/HSS, which facilitates the downlink service, so that the upgrade does not need to be performed. All MSC/VLRs in the current network can complete the service, so that the CSFB service can be realized by using the original MSC/VLR, and the SMS is upgraded by upgrading a small amount of IWF, thereby reducing the operation cost.

Further, the second learning module 1002 in this embodiment may be specifically used according to the foregoing.

The MSC/VLR information in the CSFB information indicates that the CSFB type of the UE is Gs CSFB; or according to the CSFB type identifier in the CSFB information, it is known that the CSFB type of the UE is Gs CSFB.

FIG. 11 is a schematic structural diagram of still another interworking function network element according to Embodiment 11 of the present invention. As shown in FIG. 11, the interworking function network element in this embodiment may include a third obtaining module 1101 and a third sending module 1102. The third obtaining module 1101 receives the request message that is sent by the MME and does not carry the SMS-only indication, and the third sending module 1102 sends an accept message to the MME, where the MME sends a location update request message to the MSC/VLR, where the MSC/VLR The HLR/HSS sends an update location message.

The functions of the foregoing embodiment of the present invention and the IWF in the fifth embodiment of the present invention can be implemented by the interworking function network element provided in this embodiment.

In this embodiment, for the UE of the CSFB type Gs CSFB, the MME is simultaneously registered in the MSC/VLR and the IWF, and the third acquiring module is not carried according to the received MME.

The request message indicated by the SMS-only is that the type of the CSFB of the UE is Gs CSFB, and the third sending module sends an accept message to the MME, and the MME sends a location update request message to the MSC/VLR, and the MSC/VLR sends an update to the HLR/HSS. Location message, making HLR/HSS only The MSC/VLR location information is stored, which facilitates the downlink service, so that the service can be completed without upgrading all the MSCs/VLRs in the existing network, so that the CSFB service can be implemented by using the original MSC/VLR, and the SMS is upgraded by using a small number of IWFs. Reduced operating costs.

Further, the interworking function network element provided in Embodiment 11 of the present invention may further include a receiving module (not shown) and a fourth acquiring module (not shown). The receiving module receives the insertion subscription data message sent by the HLR/HSS, and the fourth acquisition module acquires the subscription data carried by the insertion subscription data message.

FIG. 12 is a schematic structural diagram of another interworking function network element according to Embodiment 12 of the present invention. As shown in FIG. 12, the interworking function network element in this embodiment may include a learning module 1201, a first sending module 1202, and a second. The sending module 1203. The learning module 1201 learns that the type of the CSFB of the UE is Gs CSFB, and the first sending module 1202 sends a paging message to the MME if the short message sent by the SMS-GMSC is received, and the second sending module 1203 receives the initial address sent by the GMSC. The message then sends the above initial address message to the MSC/VLR.

The functions of the third embodiment of the present invention, the sixth embodiment of the present invention, the seventh embodiment of the present invention, and the IWF in the eighth embodiment of the present invention can be implemented by the interworking function network element provided in this embodiment.

In this embodiment, for a UE of the CSFB type Gs CSFB, the MME is simultaneously registered in the MSC/VLR and the IWF. If the downlink SMS is performed, the first sending module intercepts the short message sent by the SMS-GMSC to the MSC/VLR. The message is sent to the MME. If a downlink voice call is made, the GMSC sends an initial address message to the MSC/VLR, so that the short message service can be directly completed on the EPS network through the IWF supporting the SGs interface and utilizes the original Gs. The MSC/VLR of the interface implements the CSFB service, so that the service can be completed without upgrading all the MSCs/VLRs in the existing network, so that the CSFB service can be realized by using the original MSC/VLR, and the SMS is upgraded by using a small number of IWFs, thereby reducing the operation cost. .

FIG. 13 is a schematic structural diagram of another interworking function network element according to Embodiment 13 of the present invention. As shown in FIG. 13, the learning module 1201 of the embodiment may further include the first obtaining. The unit 1301 and the first learned unit 1302. The first obtaining unit 1301 obtains Taking the first CSFB information, the first CSFB information includes the MSC/VLR information, and the first learning unit 1302 learns that the type of the CSFB of the UE is Gs CSFB according to the first CSFB information.

Alternatively, the learning module 1201 of this embodiment may further include a second obtaining unit 1303 and a second learning unit 1304. The second obtaining unit 1303 acquires the second CSFB information, and the second learning unit 1304 learns that the type of the CSFB of the UE is Gs CSFB according to the second CSFB information.

Alternatively, the learning module 1201 of this embodiment may further include a third obtaining unit 1305 and a third learning unit 1306. The third obtaining unit 1305 receives the request message sent by the MME that does not carry the SMS-only indication, and the third learning unit 1306 learns that the type of the CSFB of the UE is Gs CSFB according to the request message.

Further, the first learning unit 1302 of the embodiment may be specifically configured to: according to the MSC/VLR information in the first CSFB information, learn that the type of the CSFB of the UE is Gs CSFB; or according to the CSFB type in the first CSFB information. The identifier of the CSFB of the UE is Gs CSFB; The CSFB type identifier in the second CSFB information is used to know that the CSFB type of the UE is Gs CSFB.

FIG. 14 is a schematic structural diagram of a mobility management network element according to Embodiment 14 of the present invention. As shown in FIG. 14, the mobility management network element of this embodiment may include a learning module 1401 and a sending module 1402. The learning module 1401 learns that the type of the CSFB of the UE is Gs CSFB, and the sending module 1402 sends a request message to the IWF, where the request message carries the CSFB information, and sends a location update request message to the MSC/VLR.

The functions of the MME in the second embodiment of the present invention and the MME in the fifth embodiment of the present invention can be implemented by the mobility management network element provided in this embodiment.

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 the program instructions, and the foregoing program may be stored in a computer readable In the storage medium, when the program is executed, the steps including the foregoing method embodiments are performed; and the foregoing storage medium includes: a ROM, a RAM, a magnetic disk, or an optical disk, and the like, which can store program codes, and finally: The above embodiments are only used to illustrate 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 of ordinary skill in the art that The technical solutions are described as being modified, or equivalents are replaced by some of the technical features; and such modifications or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

Rights request

A method for processing a location update, comprising:

The IWF learns, according to the CSFB information, that the type of the CSFB of the UE is Gs CSFB; the IWF sends an update location message including the MSC/VLR information to the HLR/HSS;

Or

The IWF obtains CSFB information;

The IWF learns that the type of the CSFB of the UE is Gs CSFB according to the CSFB information; the IWF sends an accept message to the MME, and the MME sends a location update request message to the MSC/VLR, and the MSC/VLR sends the HLR/HSS to the HLR/HSS. Send an update location message;

Or

The method according to claim 1, wherein the sending, by the MSC/VLR, the update location message to the HLR/HSS comprises: sending, by the MSC/VLR, an update location message to the IWF, where the IWF is located The HLR/HSS sends the update location message.

The method according to claim 1 or 2, wherein the IWF learns that the CSFB type of the UE is Gs CSFB according to the CSFB information, and specifically includes:

The IWF learns that the CSFB type of the UE is Gs CSFB according to the MSC/VLR information in the CSFB information; or

The IWF learns that the CSFB type of the UE is Gs CSFB according to the CSFB type identifier in the CSFB information.

The method of claim 1 or 2, wherein the acquiring, by the IWF, the CSFB information comprises: receiving, by the IWF, a request message sent by the MME, where the request message carries CSFB information.

The method according to claim 1, wherein the sending, by the IWF, the update location message including the MSC/VLR information to the HLR/HSS further comprises: sending, by the HLR/HSS, an insertion subscription to the IWF Data message.

The method according to claim 1, wherein the sending, by the MSC/VLR, the update location message to the HLR/HSS further comprises:

Receiving, by the IWF, an insertion subscription data message sent by the HLR/HSS;

The IWF acquires subscription data carried by the insertion subscription data message.

7. A service processing method, the method comprising:

The IWF learns that the CSFB type of the UE is Gs CSFB;

The method according to claim 7, wherein the IWF learns that the type of the CSFB of the UE is Gs CSFB, and specifically includes:

The IWF learns that the CSFB type of the UE is Gs CSFB according to the CSFB information; or

The IWF obtains CSFB information;

The IWF learns that the type of the CSFB of the UE is Gs CSFB according to the request message.

The method according to claim 8, wherein the IWF learns that the CSFB type of the UE is Gs CSFB according to the CSFB information, and specifically includes:

The IWF learns the CSFB of the UE according to the MSC/VLR information in the CSFB information. Type is Gs CSFB; or

The method of claim 8, wherein the acquiring, by the IWF, the CSFB information comprises: receiving, by the IWF, a request message sent by the MME, where the request message carries CSFB information.

The method according to claim 7, wherein the method further comprises: the MME knowing that the type of the CSFB of the UE is Gs CSFB;

The MME sends a request message to the IWF, and the request message carries CSFB information, and sends a location update request message to the MSC/VLR.

12. An interworking function network element, comprising:

a first acquiring module, configured to acquire CSFB information, where the CSFB information includes MSC/VLR information;

a first learning module, configured to learn, according to the CSFB information, that the type of the CSFB of the UE is Gs CSFB;

a first sending module, configured to send, to the HLR/HSS, an update location message including the MSC/VLR information; or

a second obtaining module, configured to acquire CSFB information;

a second sending module, configured to send an accept message to the MME, where the MME sends a location update request message to the MSC/VLR, for the MSC/VLR to send an update location message to the HLR/HSS; or

a third acquiring module, configured to receive a request message sent by the MME that does not carry an SMS-only indication; a third sending module, configured to send an accept message to the MME, where the MME sends a location update request message to the MSC/VLR, where The MSC/VLR sends an update location message to the HLR/HSS.

The interworking function network element according to claim 12, wherein the first learning module is configured to learn, according to the MSC/VLR information in the CSFB information, that the type of the CSFB of the UE is Gs CSFB; or Obtaining that the CSFB type of the UE is Gs CSFB according to the CSFB type identifier in the CSFB information; or

The second learning module is configured to learn, according to the MSC/VLR information in the CSFB information, that the type of the CSFB of the UE is Gs CSFB, or that the CSFB type of the UE is determined according to the CSFB type identifier in the CSFB information. Gs CSFB.

The interworking function network element according to claim 12, further comprising: a receiving module, configured to receive an insertion subscription data message sent by the HLR/HSS; and a fourth obtaining module, configured to acquire the insertion The contract data carried in the contract data message.

15. An interworking function network element, comprising:

The second sending module is configured to send the initial address message to the MSC/VLR if receiving an initial address message sent by the GMSC.

The interworking function network element according to claim 15, wherein the learned module comprises:

a first acquiring unit, configured to acquire first CSFB information, where the first CSFB information includes MSC/VLR information;

a first learning unit, configured to learn, according to the first CSFB information, that the type of the CSFB of the UE is Gs CSFB; or

a second acquiring unit, configured to acquire second CSFB information;

a second learning unit, configured to learn, according to the second CSFB information, that the type of the CSFB of the UE is Gs CSFB; or

a third acquiring unit, configured to receive a request message sent by the MME that does not carry an SMS-only indication; The third learning unit is configured to learn, according to the request message, that the type of the CSFB of the UE is Gs CSFB.

17. The interworking function network element of claim 16 wherein:

The first learning unit is specifically configured to: according to the MSC/VLR information in the first CSFB information, learn that the type of the CSFB of the UE is Gs CSFB; or learn the UE according to the CSFB type identifier in the first CSFB information. The type of CSFB is Gs CSFB;

The second learning unit is configured to: according to the MSC/VLR information in the second CSFB information, learn that the type of the CSFB of the UE is Gs CSFB; or learn the UE according to the CSFB type identifier in the second CSFB information. The type of CSFB is Gs CSFB.

18. A mobility management network element, comprising:

And a sending module, configured to send a request message to the IWF, where the request message carries the CSFB information, and sends a location update request message to the MSC/VLR.