WO2016119262A1

WO2016119262A1 - Service disaster recovery method, related device, and communication system

Info

Publication number: WO2016119262A1
Application number: PCT/CN2015/072049
Authority: WO
Inventors: 陈波; 范昱; 孙晓姬
Original assignee: 华为技术有限公司
Priority date: 2015-01-30
Filing date: 2015-01-30
Publication date: 2016-08-04
Also published as: CN106465094B; CN106465094A

Abstract

Embodiments of the present invention solve the problem in the prior art of poor service disaster recovery effects. Provided are a service disaster recovery method, a related device, and a communication system. The method comprises: when a mobile management entity (MME) attached to a user equipment (UE) malfunctions, a serving MME receives a query request message transmitted by a network element, where the query request message is used for requesting the MME attached to the UE for acquiring information corresponding to a service of the UE, the query request message comprises an identity of the MME attached to the UE and an identity of the UE, and the MME attached to the UE and the serving MME are located in a same MME pool area; the serving MME acquires user information of the UE on the basis of the identity of the UE; and, the serving MME determines the information corresponding to the service of the UE on the basis of the user information of the UE and transmits a query response message to the network element, where the query response message comprises the information corresponding to the service of the UE. The method is applicable in the field of communication technologies.

Description

Method, related device and communication system for service disaster tolerance

Technical field

The present invention relates to the field of communications technologies, and in particular, to a service disaster tolerance method, related device, and communication system.

Background technique

In the Long Term Evolution (LTE) network architecture, a Mobility Management Entity (MME) pool is a plurality of MMEs serving the same radio area at the same time. Each MME and MME in the MME Pool All the base stations in the pool are interconnected, and the MME in the MME Pool implements resource sharing and service load sharing.

However, the existing service disaster recovery method is ineffective. For example, when the UE is attached to the current MME to perform the called service of the LTE-based voice (VoLTE over LTE, VoLTE), if the current MME fails, due to the current The MME is unable to process the operation related to the called service of the UE's VoLTE, and the called service of the VoLTE of the UE fails. The normal operation is performed only after the UE reattaches to a working MME in the MME pool area. The MME provides the UE with a service corresponding to the VoLTE called, so that the VoLTE called service of the UE is restored.

Therefore, with the prior art, the VoLTE called service of the UE cannot be successfully successful at one time, and the time required for the UE to reattach from the failed MME to the MME that works normally in the MME pool area is long, resulting in a poor user experience.

Summary of the invention

The embodiment of the present invention provides a service disaster tolerance method, a related device, and a communication system, which solves the problem that the service disaster tolerance effect is poor when the MME attached to the UE fails.

In order to achieve the above object, embodiments of the present invention adopt the following technical solutions:

In a first aspect, an embodiment of the present invention provides a method for service disaster tolerance, where the method includes:

After the fault of the mobility management entity MME attached to the user equipment UE, the serving MME receives the query request message sent by the network element, where the query request message is used to request the MME attached to the UE to obtain the information corresponding to the service of the UE. The query request message includes an identifier of the MME to which the UE is attached and an identifier of the UE, where the MME attached to the UE and the serving MME are located in the same MME pool area;

Obtaining, by the serving MME, user information of the UE according to the identifier of the UE;

The serving MME determines information corresponding to the service of the UE according to the user information of the UE, and sends an inquiry response message to the network element, where the query response message includes information corresponding to the service of the UE.

In a first possible implementation, in combination with the first aspect, before the mobile management entity MME to which the user equipment UE is attached is faulty, the method further includes:

The serving MME receives the user information of the UE and the identifier of the UE that are sent by the MME attached to the UE, and records the correspondence between the user information of the UE and the identifier of the UE;

And the acquiring, by the serving MME, the user information of the UE according to the identifier of the UE, specifically includes:

The serving MME acquires user information of the UE saved by the serving MME according to the identifier of the UE.

In a second possible implementation, in combination with the first aspect, the acquiring, by the serving MME, the user information of the UE according to the identifier of the UE includes:

The serving MME sends a broadcast request message to all MMEs in the MME pool area, where the broadcast request message includes an identifier of the UE, and the broadcast message is used to request to acquire user information of the UE.

The serving MME receives a broadcast response message of the backup MME of the MME to which the UE is attached, and the broadcast response message includes user information of the UE.

In a third possible implementation, in combination with the first aspect to any one of the second possible implementation manners of the first aspect, before the serving MME obtains the user information of the UE according to the identifier of the UE, The method also includes:

Determining, by the serving MME, the service according to the identifier of the MME to which the UE is attached. The MME is an MME that provides services for the UE after the MME attached to the UE fails.

In a fourth possible implementation, in combination with the third possible implementation, the serving MME determines, according to the identifier of the MME to which the UE is attached, that the serving MME is after the MME attached to the UE fails. The MME that provides the service for the UE specifically includes:

The serving MME determines that the MME of the pre-configured MME includes the MME of the UE, and determines the MME that serves the UE when the MME attached to the UE fails after the serving MME is determined.

In a fifth possible implementation, in combination with the first aspect to any one of the fourth possible implementation manners of the first aspect, if the home user register HSS passes the routing proxy node DRA with the serving MME and the UE If the attached MME is connected, the network element is the DRA; if the HSS is directly connected to the serving MME and the MME to which the UE is attached, the network element is the HSS.

In a sixth possible implementation, in combination with the first aspect to any one of the fifth possible implementation manners of the first aspect, the query response message further includes an identifier of the MME to which the UE is attached.

In a second aspect, an embodiment of the present invention provides a method for service disaster tolerance, where the method includes:

Obtaining, by the network element, the first path set and the second path set corresponding to the identifier of the destination mobility management entity MME, where the first path set and the second path set each include at least one path, the first path The path in the set is a path from the network element to the destination MME, the path in the second path set is a path from the network element to a serving MME, and the serving MME is generated when the destination MME After the fault, the MME that provides the service to the user equipment UE that is attached to the target MME does not pass the serving MME, and the path in the second path set does not pass the destination. The MME, the serving MME and the destination MME are located in the same pool area;

Sending, by the network element, a query request message by using a path in the first path set, The query request message is used to request the MME attached to the UE to obtain information corresponding to the service of the UE, where the query request message includes an identifier of the MME attached to the UE and an identifier of the UE, where The MME attached to the UE is the destination MME;

After the network element fails to send the query request message through all paths in the first path set, the network element sends the query request message by using a path in the second path set;

The network element receives the query response message sent by the serving MME, where the query response message includes information corresponding to the service of the UE.

In a first possible implementation, in combination with the second aspect, if the home user register HSS is connected to the serving MME and the MME to which the UE is attached by the routing proxy node DRA, the network element is the DRA; The HSS is directly connected to the serving MME and the MME to which the UE is attached, and the network element is the HSS.

In a third aspect, an embodiment of the present invention provides a serving MME, where the serving MME includes: a receiving unit, an obtaining unit, a determining unit, and a sending unit;

The receiving unit is configured to: after the fault of the mobility management entity MME to which the user equipment UE is connected, receive a query request message sent by the network element, where the query request message is used to request the MME attached to the UE to acquire the service of the UE Corresponding information, the query request message includes an identifier of the MME to which the UE is attached, and an identifier of the UE, where the MME attached to the UE and the serving MME are located in the same MME pool area;

The acquiring unit is configured to acquire user information of the UE according to the identifier of the UE;

a determining unit, configured to determine, according to user information of the UE, information corresponding to the service of the UE;

The sending unit is configured to send a query response message to the network element, where the query response message includes information corresponding to the service of the UE.

In a first possible implementation, in combination with the third aspect, the receiving unit is further configured to: receive user information of the UE and an identifier of the UE that are sent by an MME attached to the UE, and record the UE Correspondence between the user information and the identifier of the UE;

The obtaining unit is specifically configured to: acquire the service according to the identifier of the UE User information of the UE saved by the MME.

In a second possible implementation, in combination with the third aspect, the sending unit is further configured to:

And sending, to the MME in the MME pool, a broadcast request message, where the broadcast request message includes an identifier of the UE, where the broadcast message is used to request to obtain user information of the UE;

The receiving unit is further configured to: receive a broadcast response message of the backup MME of the MME to which the UE is attached, where the broadcast response message includes user information of the UE.

In a third possible implementation, in combination with any one of the third aspect to the second possible implementation manner of the third aspect, the determining unit is further configured to:

Determining, according to the identifier of the MME to which the UE is attached, the serving MME is an MME that provides services for the UE after the MME attached to the UE fails.

In a fourth possible implementation, in combination with the third possible implementation manner, the determining unit is specifically configured to: determine, by determining, that the identifier of the pre-configured MME includes the identifier of the MME to which the UE is attached. The MME that provides the UE with the MME when the MME attached to the UE fails.

In a fifth possible implementation, in combination with any one of the third aspect to the fourth possible implementation manner of the third aspect, if the home user register HSS passes the routing proxy node DRA with the serving MME and the UE If the attached MME is connected, the network element is the DRA; if the HSS is directly connected to the serving MME and the MME to which the UE is attached, the network element is the HSS.

In a sixth possible implementation, in combination with any one of the third aspect to the fifth possible implementation manner of the third aspect, the query response message further includes an identifier of the MME to which the UE is attached.

In a fourth aspect, an embodiment of the present invention provides a network element, where the network element includes: an obtaining unit, a sending unit, and a receiving unit;

The acquiring unit is configured to acquire a first path set and a second path set corresponding to the identifier of the destination mobility management entity MME, where the first path set and the second path set each include at least one path, The road in the first path set The path is the path from the network element to the destination MME, and the path in the second path set is a path from the network element to the serving MME, and the serving MME is after the destination MME fails. The MME that provides the service to the user equipment UE that is attached to the target MME, the path in the first path set does not pass through the serving MME, and the path in the second path set does not pass the destination MME. The serving MME and the destination MME are located in the same pool area;

The sending unit is configured to send, by using the path in the first path set, a query request message, where the query request message is used to request, by the MME attached to the UE, information about acquiring a service of the UE, where The query request message includes an identifier of the MME to which the UE is attached and an identifier of the UE, where the MME attached to the UE is the destination MME;

The sending unit is further configured to: after the sending unit fails to send the query request message by using all paths in the first path set, send the query request message by using a path in the second path set;

The receiving unit is configured to receive a query response message sent by the serving MME, where the query response message includes information corresponding to the service of the UE.

In a first possible implementation, in combination with the fourth aspect, if the home user register HSS is connected to the serving MME and the MME to which the UE is attached by using the routing proxy node DSA, the network element is the DRA; The HSS is directly connected to the serving MME and the MME to which the UE is attached, and the network element is the HSS.

In a fifth aspect, an embodiment of the present invention provides a serving MME, where the serving MME includes: a receiver, a processor, a bus, a memory, and a transmitter;

The receiver is configured to: after the fault of the mobility management entity MME to which the user equipment UE is connected, receive a query request message sent by the network element, where the query request message is used to request the MME attached to the user equipment UE to acquire the service of the UE Corresponding information, the query request message includes an identifier of the UE, and the MME attached to the UE and the serving MME are located in the same MME pool area;

Obtaining, by the bus, an instruction in the memory, by using the bus, to acquire user information of the UE according to the identifier of the UE; Determining information corresponding to the service of the UE;

The sender is configured to send a query response message to the network element, where the query response message includes information corresponding to the service of the UE.

In a sixth aspect, an embodiment of the present invention provides a network element, where the network element includes: a receiver, a processor, a bus, a memory, and a transmitter;

The processor acquires, by using the bus, an instruction in the memory, where the first path set and the second path set corresponding to the identifier of the destination mobility management entity MME are acquired, where the first path set and the The second path set includes at least one path, the path in the first path set is a path from the network element to the destination MME, and the path in the second path set is from the network element a path to the serving MME, where the serving MME is an MME that provides a service to the user equipment UE attached to the destination MME after the destination MME fails, and the path in the first path set does not pass the Serving the MME, the path in the second path set does not pass through the destination MME, and the serving MME and the destination MME are located in the same pool area;

The sender is configured to send, by using the path in the first path set, a query request message, where the query request message is used to request, by the MME attached to the UE, information about the service of the UE, where The query request message includes an identifier of the MME to which the UE is attached and an identifier of the UE;

After the sender fails to send the query request message through all the paths in the first path set, the sender sends the query request message by using a path in the second path set;

The receiver is configured to receive a query response message sent by the serving MME, where the query response message includes information corresponding to the service of the UE.

In a seventh aspect, the embodiment of the present invention provides a communication system, where the communication system includes at least the MME according to the third aspect, or the MME according to any one of the possible implementation manners of the third aspect, and the fourth aspect. The network element or the network element of any one of the possible implementation manners of the fourth aspect; or

The communication system includes at least the MME as described in the fifth aspect, and the sixth party The network element described above.

The embodiment of the present invention provides a service disaster tolerance method, a related device, and a communication system, which solves the problem that the service disaster tolerance of the prior art is poor. In this method, when the MME attached to the UE fails, the UE exists. The HSS or the DRA sends the query request message of the HSS to the serving MME, and the serving MME obtains the user information of the UE according to the identifier of the UE, and obtains the information corresponding to the service of the UE by using the user information of the UE, and the The information corresponding to the service of the UE is sent to the HSS, thereby avoiding the problem that the disaster recovery effect caused by the UE's service cannot be successful once the MME attached to the UE fails.

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.

1 is a schematic diagram of an LTE network architecture;

2 is a flow chart of a method for service disaster tolerance;

3 is a schematic diagram of a networking relationship between an HSS and an MME;

FIG. 4 is a flowchart of another method for service disaster tolerance;

FIG. 5 is a flowchart of another method for service disaster tolerance;

6 is a schematic diagram of a serving MME;

7 is a schematic diagram of a network element;

FIG. 8 is a schematic diagram of another network element or another serving MME.

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, but not all 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.

With reference to FIG. 1, an LTE network architecture is exemplarily described. In a packet switching (PS) domain core network of the architecture, MME1, MME2, and MME3 form an MME Pool, a Serving Gateway (SGW), and The Packet Data Network Gateway (PGW) forms a Gateway Pool (GW Pool). In addition, the PS domain core network of the LTE network also includes a Home Subscriber Server (HSS).

In the access network of the architecture, each mobile communication device is connected to a base station in the LTE access network, and the base station in the access network is connected to each MME in the MME Pool. It should be noted that, in FIG. Sexually describes the connection relationship of some network elements. For example, the HSS actually has a connection relationship with each MME in the MME Pool, and the MMEs in the MME Pool are connected to each other.

In the prior art, when there is a VoLTE called service of the UE1, the HSS needs to query the information of the current domain of the UE1, that is, whether the UE1 is currently in a packet switching (PS) domain or a circuit switching (CS). The information of the domain, at this time, the HSS sends a query request message to the MME1 to which the UE1 is attached to request the acquisition of the above information of the UE1. However, the MME1 fails, the query request of the HSS fails, and the VoLTE called service of the UE1 fails.

At this time, it is necessary to wait for the UE1 to re-attach to a working MME in the MME Pool by actively initiating a service request. For example, after the MME2, the VoLTE called service of the UE1 can be performed normally, but the UE1 needs to reattach to a normal MME. Longer time, resulting in a poor user experience.

In order to solve the problem that the disaster tolerance effect of the prior art is poor, the embodiment of the present invention provides a service disaster tolerance method, so that the network element such as the HSS or the Diameter Routing Agent (DRA) can obtain the identifier of the MME1. Two path sets, one of which is a set of paths from the network element to the MME1, and the other path is a set of paths from the network element to the MME2 (the MME2 is as described) After the MME1 fails, the MME that provides the service to the UE attached to the MME1, the network element may send a query request message to the MME1 by using the path of the network element to the MME1 to request acquisition. Corresponding to the service of the UE If the message is sent, the MME1 sends a fault, and the network element can send a query to the MME2 by using the path of the network element to the MME2. The request message, the MME2 may query the user information of the UE according to the identifier information of the UE included in the query request message, such as the IMSI information of the UE, and query the current domain of the UE from the user information of the UE. Information and send information about the domain in which the UE is currently located to the HSS.

Specifically, the user information of the UE includes the subscription data information of the UE, the information corresponding to the service of the UE, and the like. When there is a service of the UE, such as a VoLTE called service of the UE, the MME may obtain the processing from the user information of the UE. The information needed for these businesses.

The technical solutions in the embodiments of the present invention will be clearly and completely described in the following with reference to the accompanying drawings.

With reference to FIG. 2, an embodiment of the present invention provides a method for service disaster tolerance, where the method includes:

After the fault of the mobility management entity MME that is attached to the user equipment UE, the serving MME receives the query request message sent by the network element, where the query request message is used to request the MME attached to the UE to obtain the service corresponding to the service of the UE. And the MME and the serving MME that are attached to the UE are located in the same MME pool area.

It should be noted that the information corresponding to the service of the UE refers to information required by the HSS to process the service when the service of the UE exists, for example, when the service of the UE is a VoLTE called service. The information corresponding to the service of the UE is information about a domain where the UE is currently located.

Specifically, in conjunction with FIG. 3, a networking relationship between an HSS and an MME is exemplarily described. When the HSS and the MME are configured by a Diameter Routing Agent (DRA) and the MME pool area as shown in FIG. When the MME is connected, the network element is the DRA, and when the HSS is directly connected to the MME in the MME pool area, the network element is the HSS.

Specifically, when the HSS needs to query the information corresponding to the service of the UE, the HSS sends a query request message to the MME attached to the UE, where the query request is cancelled. The information includes the identifier of the UE, such as the International Mobile Subscriber Identification Number (IMSI) of the UE.

Assume that the UE is the UE1 and the UE1 is attached to the MME1. When the MME1 fails, the HSS or the DRA sends the query request message to a normal MME in the MME pool area, such as MME2, as the serving MME of UE1.

202. The serving MME acquires user information of the UE according to the identifier of the UE.

After receiving the query request message, the MME2 first determines, according to the identifier of the UE, whether the user information of the UE corresponding to the identifier of the UE is stored, and the user information of the UE includes the subscription data information of the UE, where the UE The information corresponding to the service, etc., when there is a UE service, such as a VoLTE called service of the UE, the MME may obtain, from the user information of the UE, information required by the HSS to process the service, that is, the UE requested by the query request message. Information corresponding to the business. If the MME2 stores the user information of the UE, the MME2 acquires the user information of the UE that is saved by the serving MME according to the identifier of the UE, and if the MME2 does not store the user information of the UE, The serving MME sends a broadcast request message to all MMEs in the MME pool area, where the broadcast request message includes the identifier of the UE, and the broadcast message is used to request to obtain user information of the UE; only the backup MME of the MME1 After receiving the broadcast message, the user information of the UE is obtained according to the identifier of the UE, and a broadcast response message is sent to the MME2, where the broadcast response message includes user information of the UE.

Specifically, in the MME pool area shown in FIG. 3, each MME obtains in advance the backup relationship of all MMEs in the pool area and the interface information of each MME. With reference to FIG. 3, it is assumed that the MME3 is the backup MME of the MME1, the MME2 is the backup MME of the MME3, and the MME1 is the backup MME of the MME2. The MME1 sends the user information of the UE attached to the MME1 to the MME3 in advance, and the MME3 records the user information of the UE. Correspondence relationship of the identity of the UE.

Therefore, when the MME3 is the backup MME of the MME1, the MME2 determines that the user information of the UE is not stored according to the identifier of the UE after receiving the query request message. The MME2 sends a broadcast message in the MME pool area, and after receiving the broadcast message, the MME 3 acquires the user information of the UE according to the identifier of the UE, and sends a broadcast response message to the MME2, where the broadcast response message is sent. The user information of the UE is included in the user information.

Of course, if the MME2 is the backup MME of the MME1, the MME2 can directly obtain the saved user information of the UE according to the identifier of the UE.

203. The serving MME determines information corresponding to the service of the UE according to the user information of the UE, and sends an inquiry response message to the network element, where the query response message includes a service corresponding to the service of the UE. information.

The MME, if the MME 2 obtains the user information of the UE, obtains information corresponding to the service of the UE from the user information of the UE, and sends a query corresponding message to the network element, where the query is performed. The response message includes information corresponding to the service of the UE.

The embodiment of the present invention provides a method for service disaster tolerance. After the MME attached to the UE fails, the HSS or the DRA sends a query request message for requesting information corresponding to the service of the UE to another MME pool. On a working MME, the working MME serves as the serving MME of the UE, and the serving MME obtains the user information of the UE according to the identifier of the UE, and obtains information corresponding to the service of the UE by using the user information of the UE, and the serving MME sends the information to the HSS. Querying a response message, the query response message includes information corresponding to the service of the UE, so that the HSS processes the service of the UE according to the information corresponding to the service of the UE, thereby avoiding the capacity that the UE's service cannot be successfully obtained at one time. The problem of poor disaster response.

In order to solve the problem that the disaster tolerance effect of the prior art is poor, with reference to FIG. 4, the embodiment of the present invention further provides a method for service disaster tolerance, and the method includes:

401. After the MME of the mobility management entity attached to the user equipment UE is faulty, the serving MME receives the query request message sent by the network element, where the query request message is used to request the MME attached to the UE to obtain the service corresponding to the service of the UE. Information, the query request message includes an identifier of an MME to which the UE is attached, and an identifier of the UE, where The MME attached to the UE and the serving MME are located in the same MME pool area.

With reference to FIG. 3, a networking relationship between an MME and an HSS is exemplarily described. In FIG. 3, MME1 and MME2 are two MMEs in the MME Pool, and the HSS is respectively connected to the MME1 and the MME2 through the DRA, and the connection relationship is as shown in FIG. As shown in FIG. 3, it is assumed that the MME to which UE1 is attached is MME1.

The first path set and the second path set are pre-configured on the DRA, where the path in the first path set is a path from the DRA to the MME1, and the path in the first path set does not pass the MME2 Arriving at MME1, the path in the second path set is a path from the DRA to the MME2, and the path in the second path set does not reach the MME2 through the MME1, where the path in the first path set The priority is greater than the priority of the path in the second set of paths.

When there is a service corresponding to the UE1, such as the VoLTE called service of the UE1, the HSS needs to query the information corresponding to the service of the UE1, such as the information of the domain where the UE1 is currently located. The HSS requests the information corresponding to the service of the UE1 by sending a query request message. Specifically, the destination MME of the query request message is the MME to which the UE1 is attached, and the query request message includes the identifier of the MME1. For example, the host name of the MME1 or the IP address of the MME1, the query request message carries the identifier of the UE, and after receiving the query request message, the DRA determines the first path set corresponding to the identifier of the MME1. a second path set, wherein the DRA first passes the path in the first path set to the query because the priority of the path in the first path set is greater than the priority of the path in the second path set The request message is forwarded. In the case that the MME1 fails, the DRA fails to forward the query request message through all the paths in the first path set, and the DRA passes the path in the second path set. Query request message to the MME2, the MME2 is the query request message is processed.

For example, with reference to FIG. 3, it is assumed that the DRA-B receives the query request message sent by the HSS for requesting the information corresponding to the service of the UE, and the query request message carries the identifier information of the MME1, which is assumed to be Mme-a, DRA-B can pre-configure the paths corresponding to the identifiers of the three MMEs, which are DRA-B→ MME1, DRA-B→DRA-A→MME1, and DRA-B→MME2, wherein the first two paths are in the first path set, the priority is higher than the third path, and the purpose is to be MME1 During normal operation, the MME1 is guaranteed to provide the UE1 with a service. Only when the MME1 fails, the MME, that is, the MME2, provides the UE1 with a service.

When the MME1 fails, the DRA-B cannot successfully forward the query request message through the first two paths, and the DRA-B forwards the query request message to the MME2 through the third path, and the MME2 queries the query. Request a message for processing.

Of course, the first path set and the second path set may not be set, and only need to ensure that when the destination MME of the query request message is the MME to which the UE is attached, the The MME that does not pass the identifier of the MME to which the UE is attached is not the MME that is attached to the MME to which the UE is attached, and the priority of the path that is not attached to the MME that is not attached to the UE. The priority of the path to the MME is not limited.

Certainly, in a scenario where there is no DRA between the HSS and the MME, but the HSS is directly connected to the MME, the path of the MME that does not pass the MME to the UE and does not pass through the MME may be configured on the HSS. Determining a path of the MME to which the UE is attached to the MME, and setting a priority of the path, so that a path of the MME that does not reach the MME attached to the UE does not have a higher priority than an MME that does not pass the UE attachment The priority of the path of the MME.

If the MME to which the UE is attached is normal, the Query Request message is sent to the MME to which the UE is attached, and the MME attached to the UE fails to pass the UE after the MME attached to the UE fails. The path of the attached MME to the MME sends a query request message to the MME. Specifically, after the MME attached to the UE is faulty, how to send the query request message to the MME may have multiple methods, which is used by the embodiment of the present invention. Not limited.

402. The serving MME determines, according to the identifier of the MME to which the UE is attached, that the serving MME is the UE after the MME attached to the UE fails. The MME providing the service.

Specifically, it is assumed that the identifier of the MME to which the UE is attached is the host name of the MME to which the UE is attached. In the scenario shown in FIG. 3, it is assumed that the MME to which the UE1 originally attached is the MME1. The MME1 is configured with the identifier of the MME1, such as the host name mme-a of the MME1, and the MME1 is configured with the identifier of the MME1, such as the host name mme-a of the MME1, and the identifier of the MME2, such as the host name mme-b of the MME2.

After the MME2 receives the query request message, because the destination MME host name of the query request message is the host name mme-a of the MME to which the UE is attached, and the MME2 determines that the destination host name is the same as its pre-configured host name, The MME 2 processes the query request message.

403. The serving MME acquires user information of the UE according to the identifier of the UE.

404. The serving MME determines information corresponding to the service of the UE according to the user information of the UE, and sends an inquiry response message to the network element, where the query response message includes a service corresponding to the service of the UE. information.

After querying the information corresponding to the service of the UE, the MME2 sends a query corresponding message to the HSS. Specifically, the MME may send a query response message to the HSS by using the DRA, where the query is related to the message. The information corresponding to the service of the UE is included, so that the HSS processes the service of the UE according to the information corresponding to the service of the UE.

Further, the query response message may further include a host name mme-a of the MME to which the UE is attached, so that the HSS does not detect that the MME attached to the UE is faulty, and reduces signaling overhead.

The embodiment of the present invention provides a method for service disaster tolerance, by pre-selecting a serving MME in the MME pool area, and configuring an identifier of the MME to which the UE is attached, such as the host name of the MME to which the UE is attached, when the UE is attached. When the MME fails, the HSS or the DSA cannot successfully forward the query request message to the MME attached to the UE by using a pre-configured path that does not pass the serving MME to the MME attached to the UE, and the HSS or the DRA through MME that does not pass through the UE attachment The path to the MME forwards the query request message to the serving MME, and the host name of the destination MME in the query request message is the host name of the MME to which the UE is attached, and the UE is also configured to be attached to the MME. The host name of the MME, the MME determines that the host name of the destination MME is the same as the host name of the MME, and performs the processing of the query request message, so that the service of the UE can be successfully succeeded once the MME attached to the UE fails. The problem of poor performance of the current technology business disaster tolerance.

In order to solve the problem that the disaster tolerance effect of the prior art is poor, the embodiment of the present invention further provides a method for service disaster tolerance. Referring to FIG. 5, the method includes:

501. The network element acquires a first path set and a second path set corresponding to the identifier of the destination mobility management entity MME, where the first path set and the second path set each include at least one path, where the a path in a path set is a path from the network element to the destination MME, a path in the second path set is a path from the network element to a serving MME, and the serving MME is when the destination After the MME is faulty, the MME that provides the service to the user equipment UE that is attached to the target MME does not pass through the serving MME, and the path in the second path set does not pass through the path. The MME, the serving MME and the destination MME are located in the same pool area.

For example, in conjunction with FIG. 3, the DRA-B is the network element, and after receiving the query request message sent by the HSS, the DRA-B determines that the query request message includes the identifier of the MME to which the UE is attached, such as The host name of the MME to which the UE is attached is mme-a, and the MME to which the UE is attached is the MME1, and the path corresponding to the identifiers of the MMEs to which the UE is attached is pre-stored in the DRA-B, in descending order of priority. The path is DRA-B→MME1, path DRA-B→DRA-A→MME1, and path DRA-B→MME2. The first two paths are the paths in the first path set, and the last path is the path in the second path set.

502. The network element sends, by using the path in the first path set, a query request message, where the query request message is used to request, by the MME attached to the UE, information about the service of the UE, where the query is performed. The request message includes the UE attached The identity of the MME and the identity of the UE.

The DRA-B first forwards the query request message through the path DRA-B→MME1 and the path DRA-B→DRA-A→MME1 in the first path set. When the MME attached to the UE fails, the DRA-B passes through the first path set. The path to forward the query request message failed.

503. After the network element fails to send the query request message by using all paths in the first path set, the network element sends the query request message by using a path in the second path set.

After the DRA-B fails to forward the query request message through all the paths in the first path set, the DRA-B judges that the path in the first path set with the higher priority cannot reach the MME1 directly through the MME2. The request message is sent to the MME1, and the DRA-B forwards the query request message to the next hop of the DRA-B in the path through the path in the second path set, that is, the path DRA-B→MME2, that is, the MME2, which is pre-configured in the MME2. The MME1 has the host name mme-a, so the MME2 determines that the destination host name in the query request message is the same as the host name of the local device, and the MME2 processes the query request message, thereby avoiding when there is a service corresponding to the UE. The business cannot be a successful one.

It should be noted that, in the embodiment of the present invention, a link set corresponding to the identifier information of the MME to which the UE is attached may be configured on the network element, where a link of the network element is connected to the UE. MME, another link is connected to the MME pre-configured with the MME identity information attached by the UE. For example, with reference to FIG. 3, it is assumed that MME1 is the MME to which UE1 is attached, and MME2 is pre-selected with the host name of MME1. The MME, taking the network element DRA-B as an example, configures the link set name of the link to the MME1 on the DRA-B = "DRA-B&MME1", where the IP address of the DRA-B and the IP address of the MME1 are respectively filled in. The priority of the link is higher; the link set name of the link to the MME2 is configured on the DRA-B = "DRA-B&MME2", where the IP address of the DRA-B and the IP address of the MME2 are respectively filled in, the chain The priority of the road is lower.

Based on this, when the DRA-B receives the query request message sent by the HSS, it determines that the host name of the destination host is mme-a, and the DRA-B passes the higher priority DRA-B& The MME1 link forwards the query request message. If the MME1 fails, the query request message fails to be forwarded. The DRA-B forwards the query request message through the lower priority DRA-B&MME2 link, and the MME2 receives the query. Request the message and process it.

Specifically, the network element receives the query response message sent by the MME, where the query response message includes information corresponding to the service of the UE.

It should be noted that, when the HSS is connected to the MME and the MME to which the UE is attached by using the routing proxy node DRA, the network element is the DRA. Or, when the HSS is directly connected to the MME and the MME to which the UE is attached, the network element is the HSS.

504. The network element receives the query response message sent by the serving MME, where the query response message includes information corresponding to the service of the UE.

For the detailed technical features of the embodiments of the present invention, reference may be made to the embodiments corresponding to the foregoing FIG. 2 and FIG. 4, which are not described herein again.

The embodiment of the present invention provides a service disaster tolerance method, in which, when there is a service corresponding to the UE, the HSS obtains the information corresponding to the service of the UE by sending a query request message to the MME attached to the UE. The query request message includes an identifier of the MME to which the UE is attached, such as a host name of the MME to which the UE is attached. The DRA or the DRA that receives the query request message sent by the HSS preferentially forwards the query request message by using the path of the MME that does not go through the serving MME to the UE, and in the case that the MME attached to the UE is faulty, The HSS or the DRA fails to forward the query request message, and the HSS or the DRA forwards the query request message to the MME by using a path that does not pass the MME attached by the UE to the serving MME. The service MME pre-configures the identifier of the MME to which the UE is attached, such as the host name of the MME to which the UE is attached, and the service MME determines the query after receiving the query request message sent by the HSS or the DRA. The MME of the UE that is included in the request message is the same as the self-configured host name, so that the query request message is processed, so that when the MME attached to the UE fails, the service of the UE exists, such as the UE. When VoLTE is called business, pass The service MME processes the service to implement a service success, and solves the problem that the current service disaster tolerance effect is poor.

In order to solve the problem that the disaster tolerance effect of the prior art is poor, the embodiment of the present invention further provides a service MME, and the service MME includes: a receiving unit 601, an obtaining unit 602, a determining unit 603, and a sending unit 604;

The receiving unit 601 is configured to: after the fault of the mobility management entity MME attached to the user equipment UE, receive a query request message sent by the network element, where the query request message is used to request the MME attached to the UE to acquire the UE Information corresponding to the service, the query request message includes an identifier of the MME to which the UE is attached, and an identifier of the UE, where the MME attached to the UE and the serving MME are located in the same MME pool area;

The obtaining unit 602 is configured to acquire user information of the UE according to the identifier of the UE.

The determining unit 603 is configured to determine, according to user information of the UE, information corresponding to the service of the UE;

The sending unit 604 is configured to send an inquiry response message to the network element, where the query response message includes information corresponding to the service of the UE.

The receiving unit 601 is further configured to: receive the user information of the UE that is sent by the MME that is attached to the UE, and the identifier of the UE, and record a correspondence between the user information of the UE and the identifier of the UE;

The obtaining unit 602 is specifically configured to: obtain the user information of the UE saved by the serving MME according to the identifier of the UE.

Specifically, the sending unit 604 is further configured to:

The receiving unit 601 is further configured to: receive a broadcast response message of the backup MME of the MME to which the UE is attached, where the broadcast response message includes the user information of the UE interest.

Optionally, the determining unit 603 is further configured to:

Specifically, the determining unit 603 is configured to: after determining that the MME of the pre-configured MME includes the identifier of the MME to which the UE is attached, and determining the serving MME, when the MME attached to the UE is faulty, The UE provides the served MME.

Specifically, if the home user register HSS is connected to the serving MME and the MME attached to the UE by the routing proxy node DRA, the network element is the DRA; if the HSS is directly related to the serving MME and the The MME to which the UE is attached is connected, and the network element is the HSS.

Optionally, the query response message further includes an identifier of the MME to which the UE is attached.

The embodiment of the present invention provides a serving MME, which is a disaster-tolerant MME of an MME that is attached to a UE that is located in the same pool area as the serving MME, and the serving MME is pre-configured with identity information of the MME to which the UE is attached, such as a UE. The host name information of the attached MME, when there is a service corresponding to the UE, such as the VoLTE called service of the UE, the HSS needs to query the service of the UE by sending a query request message to the MME attached to the UE. The information of the MME of the query request message is the identifier information of the MME to which the UE is attached. When the MME attached to the UE is faulty, the HSS or the DRA corresponds to the identifier information of the MME to which the UE is attached. All the paths of the MME that do not pass the DR to the MME attached to the UE cannot be successfully forwarded to the MME to which the UE is attached, and the HSS or DRA passes the lower priority. The path of the MME that is attached to the UE to the disaster recovery MME sends the query request message to the DR MME, and the DR MME determines that the identifier of the destination MME is its pre-configured host name. The MME requests the query to cancel The information is processed, so that the service of the UE can be successfully succeeded in the case that the MME attached to the UE is faulty, and the problem that the current service disaster tolerance effect is poor is solved.

In order to solve the problem that the disaster tolerance effect of the prior art is poor, the embodiment of the present invention further provides a network element, and the network element includes: an obtaining unit 701, a sending unit 702, and a receiving unit 703;

The acquiring unit 701 is configured to acquire a first path set and a second path set corresponding to the identifier of the destination mobility management entity MME, where the first path set and the second path set each include at least one path The path in the first path set is a path from the network element to the destination MME, and the path in the second path set is a path from the network element to a serving MME, where the serving MME is After the destination MME is faulty, the MME that provides the service to the user equipment UE attached to the destination MME does not pass the service MME in the first path set, and the second path set The path does not pass through the destination MME, and the serving MME and the destination MME are located in the same pool area;

The sending unit 702 is configured to send, by using the path in the first path set, a query request message, where the query request message is used to request, by the MME attached to the UE, information about the service of the UE, where The query request message includes an identifier of the MME to which the UE is attached and an identifier of the UE;

The sending unit 702 is further configured to send the query request message by using a path in the second path set after the sending unit fails to send the query request message through all paths in the first path set. ;

The receiving unit 703 is configured to receive a query response message sent by the serving MME, where the query response message includes information corresponding to the service of the UE.

The embodiment of the present invention provides a network element, where the network element is pre-configured with multiple paths corresponding to the destination MME, where the path of the path that does not pass through the DR to the destination MME is higher than that of the destination MME. The priority of the path, the DR MME is pre-selected and the MME attached to the UE is located in the same MME pool area and pre-configured The MME having the host name of the MME to which the UE is attached, in the scenario that the MME attached to the UE is faulty, after the network element determines the destination MME of the query request message, the UE that has the higher priority does not go through the DR to the UE. All the path forwarding of the MME fails. The network element sends the query request message to the DR MME through the path of the lower priority MME that does not pass the UE to reach the DR MME. The query request message is processed, so that the service of the UE is successful once, thereby solving the problem that the disaster recovery effect of the prior art service is poor.

In order to solve the problem that the disaster tolerance effect of the prior art is poor, the embodiment of the present invention further provides a service MME. In combination with FIG. 8, the service MME includes: a receiver, a processor, a bus, a memory, and a transmitter;

The receiver is configured to: after the fault of the mobility management entity MME to which the user equipment UE is connected, receive a query request message sent by the network element, where the query request message is used to request the MME attached to the UE to acquire the service of the UE Corresponding information, the query request message includes an identifier of the UE, and the MME attached to the UE and the serving MME are located in the same MME pool area;

Obtaining, by the bus, the instruction in the memory, by using the bus, to acquire user information of the UE according to the identifier of the UE, and determining, according to user information of the UE, information corresponding to the service of the UE ;

Specifically, the receiver is further configured to: receive the user information of the UE and the identifier of the UE that are sent by the MME that is attached to the UE, and record a correspondence between the user information of the UE and the identifier of the UE. ;

The processor is specifically configured to: obtain the user information of the UE saved by the serving MME according to the identifier of the UE.

Specifically, the sender is further configured to: send a broadcast request message to all MMEs in the MME pool area, where the broadcast request message includes an identifier of the UE, and the broadcast message is used to request to acquire the UE. User information;

The receiver is further configured to: receive a broadcast response message of the backup MME of the MME to which the UE is attached, where the broadcast response message includes user information of the UE.

Optionally, the processor is further configured to: determine, according to the identifier of the MME to which the UE is attached, that the serving MME is an MME that provides services for the UE after the MME attached to the UE fails.

Optionally, the processor is configured to: determine, by using the identifier of the MME that is included in the pre-configured MME, that the MME that is attached to the UE is determined to be the UE when the MME attached to the UE is faulty. The MME providing the service.

In order to solve the problem that the disaster tolerance effect of the prior art is poor, the embodiment of the present invention further provides a network element, which is combined with FIG. 8 , the network element includes: a receiver, a processor, a bus, a memory, and a transmitter;

The embodiment of the present invention provides a network element, where the network element is pre-configured with multiple paths corresponding to the destination MME, and the path of the path that does not pass through the disaster recovery MME to the destination MME is optimized. The priority is higher than the priority of the path of the MME that does not pass the destination MME to the disaster-tolerant MME. The DR is the pre-selected MME that is in the same MME pool area as the MME attached to the UE and is pre-configured with the host name of the MME to which the UE is attached. In the scenario where the MME of the UE is faulty, after the network element determines the destination MME of the Query Request message, all the paths of the MME that are not attached to the MME are not forwarded through the MME. The network element sends the query request message to the DR MME through the path of the lower priority MME that does not pass the UE to reach the DR MME, and the DR MME processes the query request message to make the UE service once. Success, thus solving the problem of poor performance of the prior art business disaster tolerance.

In order to solve the problem that the disaster tolerance effect of the prior art is poor, the embodiment of the present invention further provides a communication system, where the communication system includes at least the MME in the embodiment corresponding to FIG. 6 and the embodiment corresponding to FIG. The network element in the network, or the communication system at least includes the serving MME and the network element in the embodiment corresponding to FIG. It should be noted that the detailed technical features of the embodiments of the MME, the network element, and the communication system of the present invention can be referred to the embodiments of the method corresponding to FIG. 2, FIG. 4, and FIG. The embodiment of the communication system will not be described again.

The above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the claims.

Claims

A method for service disaster tolerance, characterized in that the method comprises:

After the fault of the mobility management entity MME attached to the user equipment UE, the serving MME receives the query request message sent by the network element, where the query request message is used to request the MME attached to the UE to obtain the information corresponding to the service of the UE. The query request message includes an identifier of the MME to which the UE is attached and an identifier of the UE, where the MME attached to the UE and the serving MME are located in the same MME pool area;

Obtaining, by the serving MME, user information of the UE according to the identifier of the UE;

The serving MME determines information corresponding to the service of the UE according to the user information of the UE, and sends an inquiry response message to the network element, where the query response message includes information corresponding to the service of the UE.
The method according to claim 1, wherein before the failure of the mobility management entity MME to which the user equipment UE is attached, the method further comprises:

The serving MME receives the user information of the UE and the identifier of the UE that are sent by the MME attached to the UE, and records the correspondence between the user information of the UE and the identifier of the UE;

And the acquiring, by the serving MME, the user information of the UE according to the identifier of the UE, specifically includes:

The serving MME acquires user information of the UE saved by the serving MME according to the identifier of the UE.
The method according to claim 1, wherein the acquiring, by the serving MME, the user information of the UE according to the identifier of the UE specifically includes:

The serving MME sends a broadcast request message to all MMEs in the MME pool area, where the broadcast request message includes an identifier of the UE, and the broadcast message is used to request to acquire user information of the UE.

The serving MME receives a broadcast response message of the backup MME of the MME to which the UE is attached, and the broadcast response message includes user information of the UE.
The method according to any one of claims 1-3, wherein the method before the serving MME acquires the user information of the UE according to the identifier of the UE, the method Also includes:

The serving MME determines that the serving MME is an MME that provides services for the UE after the MME attached to the UE fails according to the identifier of the MME to which the UE is attached.
The method according to claim 4, wherein the serving MME determines that the serving MME is to provide services for the UE after the MME attached to the UE fails according to the identifier of the MME to which the UE is attached. The MME specifically includes:

The serving MME determines that the MME of the pre-configured MME includes the MME of the UE, and determines the MME that serves the UE when the MME attached to the UE fails after the serving MME is determined.
The method according to any one of claims 1-5, wherein if the home user register HSS is connected to the serving MME and the MME to which the UE is attached by the routing proxy node DRA, the network element is the The network element is the HSS if the HSS is directly connected to the serving MME and the MME to which the UE is attached.
The method according to any one of claims 1-6, wherein the query response message further comprises an identifier of an MME to which the UE is attached.
A method for service disaster tolerance, characterized in that the method comprises:

Obtaining, by the network element, the first path set and the second path set corresponding to the identifier of the destination mobility management entity MME, where the first path set and the second path set each include at least one path, the first path The path in the set is a path from the network element to the destination MME, the path in the second path set is a path from the network element to a serving MME, and the serving MME is generated when the destination MME After the fault, the MME that provides the service to the user equipment UE that is attached to the target MME does not pass the serving MME, and the path in the second path set does not pass the destination. The MME, the serving MME and the destination MME are located in the same pool area;

The network element sends a query request message by using the path in the first path set, where the query request message is used to request, by the MME attached to the UE, information about the service of the UE, where the query request message is sent. Included in the MME to which the UE is attached And the identifier of the UE, where the MME attached by the UE is the destination MME;

After the network element fails to send the query request message through all paths in the first path set, the network element sends the query request message by using a path in the second path set;

The network element receives the query response message sent by the serving MME, where the query response message includes information corresponding to the service of the UE.
The method according to claim 8, wherein if the home user register HSS is connected to the serving MME and the MME to which the UE is attached by the routing proxy node DSA, the network element is the DRA; The HSS is directly connected to the serving MME and the MME to which the UE is attached, and the network element is the HSS.
A serving mobility management entity MME, wherein the serving MME comprises: a receiving unit, an obtaining unit, a determining unit, and a sending unit;

The receiving unit is configured to: after the fault of the mobility management entity MME to which the user equipment UE is connected, receive a query request message sent by the network element, where the query request message is used to request the MME attached to the UE to acquire the service of the UE Corresponding information, the query request message includes an identifier of the MME to which the UE is attached, and an identifier of the UE, where the MME attached to the UE and the serving MME are located in the same MME pool area;

The acquiring unit is configured to acquire user information of the UE according to the identifier of the UE;

a determining unit, configured to determine, according to user information of the UE, information corresponding to the service of the UE;

The sending unit is configured to send a query response message to the network element, where the query response message includes information corresponding to the service of the UE.
The serving MME according to claim 10, wherein the receiving unit is further configured to: receive user information of the UE and an identifier of the UE sent by an MME attached to the UE, and record a user of the UE Correspondence between the information and the identity of the UE;

The acquiring unit is specifically configured to: obtain the user information of the UE saved by the serving MME according to the identifier of the UE.
The serving MME according to claim 10, wherein the sending unit is further configured to:

And sending, to the MME in the MME pool, a broadcast request message, where the broadcast request message includes an identifier of the UE, where the broadcast message is used to request to obtain user information of the UE;

The receiving unit is further configured to: receive a broadcast response message of the backup MME of the MME to which the UE is attached, where the broadcast response message includes user information of the UE.
The service MME according to any one of claims 10 to 12, wherein the determining unit is further configured to:

Determining, according to the identifier of the MME to which the UE is attached, the serving MME is an MME that provides services for the UE after the MME attached to the UE fails.
The serving MME according to claim 13, wherein the determining unit is configured to: when determining the identifier of the MME that is included in the pre-configured MME, the identifier of the MME to which the UE is attached, when determining the serving MME After the UE attached to the MME fails, the MME that provides the UE is served.
The serving MME according to any one of claims 10 to 14, wherein if the home user register HSS is connected to the serving MME and the MME to which the UE is attached by the routing proxy node DRA, the network element is Said DRA; if the HSS is directly connected to the serving MME and the MME to which the UE is attached, the network element is the HSS.
The serving MME according to any one of claims 10-15, wherein the query response message further comprises an identifier of an MME to which the UE is attached.
A network element, where the network element includes: an acquiring unit, a sending unit, and a receiving unit;

The acquiring unit is configured to acquire a first path set and a second path set corresponding to the identifier of the destination mobility management entity MME, where the first path set and the second path set each include at least one path, The path in the first path set is a path from the network element to the destination MME, and the path in the second path set is a path from the network element to a serving MME, where the serving MME is The destination MME After the fault occurs, the MME that provides the service to the user equipment UE attached to the destination MME does not pass the path of the serving MME, and the path in the second path set does not pass the a destination MME, where the serving MME and the destination MME are located in the same pool area;

The sending unit is configured to send, by using the path in the first path set, a query request message, where the query request message is used to request, by the MME attached to the UE, information about acquiring a service of the UE, where The query request message includes an identifier of the MME to which the UE is attached and an identifier of the UE, where the MME attached to the UE is the destination MME;

The sending unit is further configured to: after the sending unit fails to send the query request message by using all paths in the first path set, send the query request message by using a path in the second path set;

The receiving unit is configured to receive a query response message sent by the serving MME, where the query response message includes information corresponding to the service of the UE.
The network element according to claim 17, wherein if the home user register HSS is connected to the serving MME and the MME to which the UE is attached by the routing proxy node DSA, the network element is the DRA; The HSS is directly connected to the serving MME and the MME to which the UE is attached, and the network element is the HSS.
A communication system, characterized in that the communication system comprises at least the service MME according to any one of claims 10 to 16, and the network element according to claim 17 or claim 18.