CN101998337A - Method and system for transmitting regional information - Google Patents

Abstract

The invention relates to a method and system for transmitting area information, belonging to the communication field. The method of the present invention includes: when the network side device receives the emergency service, if it judges that the current area where the UE that initiates the emergency service is located is an unrestricted area, then notify the UE that the current area where it is located is an unrestricted area; The UE receives the notification, and according to the received notification, deletes the current area from the locally stored restricted area information. By adopting the technical solution of the present invention, the restricted area information stored by the UE can be updated in time, thereby improving user experience and network availability.

Description

Method and system for transmitting regional information

technical field

The invention relates to the communication field, in particular to a method and system for transmitting area information.

Background technique

IP Multimedia Core Network Subsystem (IMS for short) is the core of the new generation communication network, which adopts the Session Initiation Protocol (SIP for short) system. SIP has nothing to do with access, and has multiple capabilities such as separation of media service control function and bearer, call and session, application and service, business and network, and integration of mobile network and Internet services.

Since IMS has nothing to do with access, the emergency service (Emergency Call, EMC for short) under IMS can be built on the system long-term evolution (System Architecture Evolution, short for SAE) network and UMTS (Universal Mobile Telecommunications System, universal mobile communication system) superior. Among them, SAE may also be called EPS (Evolved Packet System, Evolved Packet System).

Figure 1 shows the main network elements involved in the emergency call of UE (User Equipment, user equipment) accessing IMS through SAE and MS (Mobile Station, mobile station) through UMTS. Wherein, UE and MS are not specially distinguished. The main network elements involved in the emergency call of the UE accessing the IMS through the SAE include: the network elements of the SAE/UMTS network part and the network elements of the IMS emergency service part.

Among them, the network elements of the SAE network are used to provide the underlying bearer management and mobility management. The network elements of the SAE network part include: enhanced wireless base station (eNodeB), mobility management entity (Mobility Management Entity, MME), and user plane data routing processing network element (SAE GW); SAE GW includes packet data network gateway (Packet Data Gateway) Network Gateway, referred to as P-GW) and Serving GW (S-GW); PCRF (Policy and Charging Rules Function, policy and charging rule function), is an important functional entity of the PCC architecture to control Internet protocol - Acquisition, assembly and delivery of IP-Connectivity Access Network (IP-Connectivity Access Network, IP-CAN) policies and charging rules, etc. Among them, IP-CAN can be a collection of devices and interfaces in EPS. The MME is responsible for managing and storing the context of the UE (for example, UE identity/user identity, mobility management status, user security parameters, etc.), assigning a temporary identity to the user, and authenticating the UE when it is camped in a tracking area or network . HSS (home subscriber server) is used to save user data.

The P-GW is the mobile anchor point in the SAE system, and the border gateway between the SAE and the Packet Data Network (PDN), responsible for accessing the PDN and forwarding data between the SAE and the PDN.

UTRAN (Universal Terrestrial Radio Access, Global Terrestrial Radio Access) and GERAN (Enhanced Data Rate for Global System for Mobile Communications Evolution Radio Access Network, Enhanced Data Rate for Global System for Mobile Communications Evolution Radio Access Network) are UMTS wireless access networks into the network. SGSN (SERVICE GPRS SUPPORTNODE, Service General Packet Radio Service Support Node) and GGSN (Gateway General Packet Radio Service Support Node) are the core network elements of the UMTS network. Among them, the SGSN has the MME control plane function and the user plane function, and the GGSN has the gateway function similar to the P-GW.

The network elements of the emergency service part of the IMS are used to control and process the sessions of emergency calls. Among them, the network elements of the IMS emergency service part include: Call Session Control Function module (Call Session Control Function, referred to as CSCF), which is the core network element to control the session process, and CSCF includes a proxy call session control function module (Proxy-CSCF, referred to as CSCF) P-CSCF), an interrogating call session control function module (Interrogating-CSCF, referred to as I-CSCF), a serving call session control function module (Serving-CSCF, referred to as S-CSCF), and an E-CSCF. Wherein, the E-CSCF is the session control center of the emergency call, and decides which PSAP the emergency call should be routed to.

Figure 2 is a flow chart of the UE finding that it is in a restricted state according to the restricted area list saved by itself, and initiates an emergency attachment to the SAE/UMTS network. The area can be a Tracking Area or a Routing Area, and the specific steps include:

Step 201, UE initiates an emergency attach request to MME/SGSN, and the request is sent through eNodeB/UTRAN/GERAN, which includes the user identity IMSI;

Step 202, establishing a secure connection between the MME/SGSN and the UE;

Step 203, the MME/SGSN establishes an emergency bearer for the user, and initiates an emergency bearer establishment request to the SAE-GW/GGSN;

In step 204, the establishment of the emergency bearer from the UE to the SAE-GW/GGSN is completed, and the UE is notified of the completion of the emergency attachment.

It can be seen from the above process that when the network changes the area to an unrestricted area, since the restricted area list saved by the UE itself has not been updated in time, the UE still judges that the area it is in is a restricted area and initiates an emergency attachment . Since the UE is attached to the network in an emergency, the UE will not be able to perform normal services in this area, thereby affecting user experience and network availability.

Contents of the invention

The technical problem solved by the present invention is to provide a method and system for transmitting area information, so as to update the restricted area information saved by the UE.

In order to solve the above problems, the present invention discloses a method for transmitting restricted area information, including:

When the network side device receives the emergency service, if it judges that the current area where the UE that initiated the emergency service is located is an unrestricted area, then notify the UE that the current area where it is located is an unrestricted area;

The UE receives the notification, and according to the received notification, deletes the current area from the locally stored restricted area information.

Further, in the above method, during the process of establishing an emergency attachment with the UE, the network side device sends an attach completion message carrying information indicating that the current area is an unrestricted area to the UE, to notify the UE The area where the UE is currently located is an unrestricted area, wherein the network side device carries indication information that the area where the UE is currently located is an unrestricted area through a newly added field of the attach complete message.

Further, in the above method, during the mobility management process of the UE, the network side device sends a mobility management message carrying information indicating that the current area is an unrestricted area to the UE to notify The area where the UE is currently located is an unrestricted area, wherein the mobility management message is an Evolved Packet Mobility Management (MME) message or a General Packet Radio Mobility Management (GMM) message.

The invention also discloses a method for transmitting restricted area information, including:

When the network side device receives the emergency service, if it judges that the current area where the UE that initiated the emergency service is located is an unrestricted area, then send a preset attachment completion message to the UE;

The UE receives the preset attach completion message, and deletes the current area from the locally stored restricted area information.

Further, in the above method, if the network side device determines that the area where the UE is currently located is a restricted area, it sends an attach complete message to the UE, and the attach complete message indicates that the area where the UE is currently located is a restricted area ;

The UE receives the attach completion message and performs emergency services.

Wherein, the network side device sets the newly added Evolved Packet System (EPS) mobility management cause value in the attach complete message to "area not allowed", to indicate that the current area is a restricted area.

The present invention also discloses a system for transmitting restricted area information, including network side equipment and UE, wherein:

The network side device is configured to receive the emergency service, and if it is judged that the current area of the UE that initiated the emergency service is an unrestricted area, notify the UE that the current area is an unrestricted area;

The UE is configured to receive the notification, and delete the current area from the locally stored restricted area information.

Further, in the above system, the network side device is configured to send an attach completion message carrying information indicating that the current area it is in is an unrestricted area to the UE during the process of establishing an emergency attachment with the UE, To notify the UE that the area where it is currently located is an unrestricted area, wherein the information indicating that the area where the UE is currently located is an unrestricted area is carried in a newly added field of the attach complete message.

Further, in the above system, the network side device, in the process of performing mobility management on the UE, sends a mobility management message carrying information indicating that the current area it is in is an unrestricted area to the UE, so as to Informing the UE that the current area is an unrestricted area, wherein the mobility management message is an Evolved Packet System Mobility Management (MME) message or a General Packet Radio Service Mobility Management (GMM) message.

The present invention also discloses a system for transmitting restricted area information, including network side equipment and UE, wherein:

The network side device is configured to receive the emergency service, and if it is judged that the current area where the UE initiating the emergency service is located is an unrestricted area, send a preset attachment completion message to the UE;

The UE is configured to receive the preset attach complete message, and delete the current area from the locally stored restricted area information.

Further, in the above system, if the network side device determines that the current area where the UE initiating the emergency service is located is a restricted area, it is further configured to send an attach complete message to the UE, and the attach complete message indicates that the current The area you are in is a restricted area;

The UE is further configured to receive the attach complete message and perform emergency services.

Wherein, the network side device sets the newly added Evolved Packet System (EPS) mobility management cause value in the attach complete message as "area not allowed" to indicate that the current area is a restricted area.

By adopting the technical solution of the present invention, the restricted area information stored by the UE can be updated in time, thereby improving user experience and network availability.

Description of drawings

FIG. 1 shows the main network elements involved in the emergency call of UE or MS accessing IMS through EPS or UMTS in the prior art;

FIG. 2 is a flow chart of UE initiating an emergency attachment in the prior art;

Fig. 3 is a flow chart of transmitting restricted area information in embodiment 1;

Fig. 4 is a flow chart of transmitting restricted area information in Embodiment 2.

Detailed ways

The main concept of the present invention is that when the UE determines that the current area is a restricted area according to the information of the restricted area saved by itself, and initiates an emergency service, the network side equipment (for example, MME or SGSN) sends the UE When sending an attach complete message, it may indicate in the attach complete message that the area where the user is currently located is an unrestricted area, or the network side device may indicate that the user is currently in an unrestricted area during the mobility management process after the user has established an emergency attachment with the network side. The current area is an unrestricted area, that is, the corresponding indication information that the current area is an unrestricted area is added to the mobility management message; and after receiving the above indication, the UE deletes it from the locally saved list of restricted areas. In the current area, and after the emergency service is completed, a normal attach can be initiated in the current area to obtain normal services.

The technical solutions of the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

A system for transmitting area information, including a network side device and a UE. in:

The network side equipment (for example, MME or SGSN) is used to receive the emergency service initiated by the UE, and query the information of the area where the UE is currently located from the HSS, that is, to determine whether the area where the UE is currently located is a restricted area. If the area where the UE is located is a restricted area, an attach completion message is sent to the UE according to the existing technology. If the area where the UE is currently located is an unrestricted area, it is necessary to notify the UE that the area where the UE is currently located is an unrestricted area;

Wherein, the network-side device may notify the UE that the current area is an unrestricted area through an attach complete message or a mobility management message. Specifically, the network-side device may add a new field in the attach complete message or the mobility management message to carry Information indicating that the current area is an unrestricted area.

The UE is configured to initiate an emergency service to the network-side device according to the restricted area information stored locally (ie, the list of restricted areas), and receive a notification that the current area it is in is an unrestricted area sent by the network side, and set the current location The area is deleted from the locally saved restricted area list, and after the emergency business is completed, the normal business can be initiated in the current area.

In other embodiments, the network-side device may also preset an attach complete message with the UE, so that when the network-side device judges that the area where the UE is currently located is an unrestricted area, it sends the preset attach complete message to the UE. Yes, and when the network side device judges that the area where the UE is currently located is a restricted area, it will send an attach complete message indicating that the area where the UE is currently located is a restricted area to the UE. Specifically, EMM Cause can be added to the attach accept message (EPS mobility management reason) field, and set the value of this field to "area not allowed" to indicate that the current area is a restricted area. At this time, the UE continues to save the current area in the restricted area list as a restricted area ; Wherein, the structure of the preset attachment completion message can be exactly the same as the existing attachment completion message, except that after receiving the attachment completion message, the UE needs to remove the current area from the locally saved restricted area list delete.

The process of transmitting area information by the above-mentioned system is described below.

Example 1

In this embodiment, when the UE needs to initiate an emergency service in a certain area, it first searches the locally stored restricted area list, and if the restricted area list includes the area where the UE is currently located (that is, the area where the UE is located is a restricted area), the UE An emergency attach is initiated. At this time, the network side has changed the area to an unrestricted area, then adopt the technical solution of the present invention to transmit the process of area restricted information, as shown in Figure 3, including the following steps:

Step 301, the UE initiates an emergency attach request to the MME or SGSN, and the emergency attach request includes the user identity IMSI;

In this step, the UE may initiate an emergency attach request according to the prior art.

Step 302, the MME or SGSN receives the emergency attach request and establishes a secure connection with the UE;

Step 303, the MME or SGSN establishes an emergency bearer for the UE, and initiates an emergency bearer establishment request to the SAE-GW/GGSN;

Step 304, when the emergency bearer from the UE to the SAE-GW/GGSN is established, the MME or SGSN learns from the HSS that the area where the user is currently located is an unrestricted area, and then sends an attach complete message to the UE, and the attach complete message carries Indication information that the user's current area is an unrestricted area;

In this step, the MME or SGSN may carry the indication information that the current area is an unrestricted area through a new field in the attach completion message;

Step 305, the UE receives the attachment complete message, reads the indication information that the current area is an unrestricted area, continues to perform the current emergency service, and deletes the current area from the locally stored restricted area list;

Step 306, when the emergency service is completed, the UE can initiate normal attachment in the current area.

In some other embodiments, the MME or the SGSN may also send a preset attach completion message to the UE after knowing that the user's current area is an unrestricted area. The area where the user is located is deleted from the locally stored restricted area list, and when the MME or SGSN learns that the user's current area is a restricted area, it can add EMM Cause (EPS mobility management reason) in the attach completion message The value indicates that the area where the UE is currently located is a restricted area. Specifically, the MME or SGSN sets the value of the newly added EMM Cause in the attach completion message to "area not allowed". At this time, after receiving the attach, the UE Keep the current area as a restricted area in the restricted area list, and complete the emergency business.

Example 2

In this embodiment, when the UE needs to initiate an emergency service in a certain area, it first searches the locally stored restricted area list, and if the restricted area list includes the area where the UE is currently located (that is, the area where the UE is located is a restricted area), The UE initiates an emergency attach. At this time, the network side has changed the area to an unrestricted area, and the network side device notifies the UE of the current restricted situation in the area through the mobility management message (EMM information). The specific process is as follows: As shown in Figure 4, it includes the following steps:

Step 401: When the UE needs to initiate an emergency service in a certain area, it first searches the locally stored restricted area list, and if the restricted area list includes the area where the UE is currently located (that is, the area where the UE is located is a restricted area), the UE then Initiate an emergency attach request to MME or SGSN;

Step 402: After receiving the emergency attach request, the MME or SGSN establishes a secure connection with the UE, establishes an emergency bearer for the UE, and initiates an emergency bearer establishment request to the SAE-GW/GGSN;

Step 403: After the emergency bearer from the UE to the SAE-GW/GGSN is established, send an attach completion message to the UE;

Step 404: Since the MME or SGSN has learned from the HSS that the UE's current area is an unrestricted area, the MME or SGSN indicates that the UE's current area is an unrestricted area during the mobility management process;

Among them, during the SAE/EPS mobility management process, the MME can indicate that the current area of the UE is an unrestricted area through an EMM (Evolved Packet System Mobility Management, evolved packet system mobility management) information message;

During the GPRS mobility management process, the SGSN can notify the mobile station MS that the current area it is in is an unrestricted area through a GMM (General Packet Radio Service Mobility Management, General Packet Radio Service Mobility Management) information message.

Step 405: After receiving the above mobility management message, the UE reads the indication information that the current area is an unrestricted area, continues to perform the current emergency service, and removes the current area from the locally saved restricted area list delete;

Step 406: When the emergency service is completed, the UE can initiate normal attachment in the current area.

It can be seen from the above embodiments that the technical solution of the present invention updates the restricted area information saved by the UE in time, thereby improving user experience and network availability.

Of course, the present invention can also have multiple implementation modes, without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes or changes according to the present invention, as long as they are within the spirit of the present invention Any modification, equivalent replacement, and improvement made within the principles and principles shall be included in the scope of protection of the appended claims of the present invention.

Claims (12)

1. A method for transmitting restricted area information, characterized in that the method comprises: When the network side device receives the emergency service, if it judges that the current area where the user equipment (UE) that initiated the emergency service is located is an unrestricted area, then notify the UE that the current area where it is located is an unrestricted area; The UE receives the notification, and according to the received notification, deletes the current area from the locally stored restricted area information. 2. The method of claim 1, wherein During the process of establishing an emergency attachment with the UE, the network side device sends an attach complete message carrying information indicating that the current area is an unrestricted area to the UE, so as to notify the UE that the current area is an unrestricted area. An unrestricted area, wherein the network side device carries information indicating that the current area it is in is an unrestricted area through a new field of the attach complete message. 3. The method of claim 1, wherein, In the process of performing mobility management on the UE, the network side device sends a mobility management message carrying information indicating that the current area is an unrestricted area to the UE, so as to notify the UE of the current area is an unrestricted area, wherein the mobility management message is an Evolved Packet System Mobility Management (MME) message or a General Packet Radio Service Mobility Management (GMM) message. 4. A method for transmitting restricted area information, characterized in that the method comprises: When the network side device receives the emergency service, if it judges that the current area where the user equipment (UE) that initiated the emergency service is located is an unrestricted area, then send a preset attachment completion message to the UE; The UE receives the preset attach completion message, and deletes the current area from the locally stored restricted area information. 5. The method of claim 4, wherein, If the network side device determines that the area where the UE is currently located is a restricted area, then sending an attach complete message to the UE, the attach complete message indicating that the area where the UE is currently located is a restricted area; The UE receives the attach completion message and performs emergency services. 6. The method of claim 5, wherein, The network side device sets the newly added Evolved Packet System (EPS) mobility management cause value in the attach complete message to "area not allowed", to indicate that the current area it is in is a restricted area. 7. A system for transmitting restricted area information, characterized in that the system includes network side equipment and user equipment (UE), wherein: The network side device is configured to receive the emergency service, and if it is judged that the current area of the UE that initiated the emergency service is an unrestricted area, notify the UE that the current area is an unrestricted area; The UE is configured to receive the notification, and delete the current area from the locally stored restricted area information. 8. The system of claim 7, wherein: The network side device is configured to send an attach complete message carrying information indicating that the current area is an unrestricted area to the UE during the process of establishing an emergency attachment with the UE, so as to notify the UE that the current area is an unrestricted area. The current area is an unrestricted area, wherein the information indicating that the current area is an unrestricted area is carried in a new field of the attach complete message. 9. The system of claim 7, wherein: The network side device, in the process of performing mobility management on the UE, sends a mobility management message carrying information indicating that the area where the UE is currently located is an unrestricted area to the UE, so as to notify the UE that the UE is currently located The area is an unrestricted area, wherein the mobility management message is an Evolved Packet System Mobility Management (MME) message or a General Packet Radio Service Mobility Management (GMM) message. 10. A system for transmitting restricted area information, characterized in that the system includes network side equipment and user equipment (UE), wherein: The network side device is configured to receive the emergency service, and if it is judged that the current area where the UE initiating the emergency service is located is an unrestricted area, send a preset attachment completion message to the UE; The UE is configured to receive the preset attach complete message, and delete the current area from the locally stored restricted area information. 11. The system of claim 10, wherein: The network side device is further configured to send an attach complete message to the UE if it determines that the current area where the UE that initiates the emergency service is located is a restricted area, and the attach complete message indicates that the currently located area is a restricted area ; The UE is further configured to receive the attach complete message and perform emergency services. 12. The system of claim 11, wherein: The network side device sets the newly added Evolved Packet System (EPS) mobility management cause value in the attach complete message to "area not allowed" to indicate that the current area it is in is a restricted area.

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