WO2012071695A1

WO2012071695A1 - Node fault processing method, system and related device

Info

Publication number: WO2012071695A1
Application number: PCT/CN2010/079226
Authority: WO
Inventors: 于游洋
Original assignee: 华为技术有限公司
Priority date: 2010-11-29
Filing date: 2010-11-29
Publication date: 2012-06-07
Also published as: CN102714615A; CN102714615B

Abstract

A node fault processing method, system and related device are provided. The method includes that: an access network side connected to a user device receives a connection establishment request sent by the user device; when the primary control node occurs failure, the storage node information storing the corresponding index table is obtained, and the connection establishment request is sent to the storage node, so that the storage node sends the connection establishment request to a standby control node backing up the current business data of the user device in a primary control node according to the corresponding index table, and so the standby control node can execute the current business of the user device.

Description

Node fault processing method, system and related equipment

Technical field

The present invention relates to the field of communications technologies, and in particular, to a node fault processing method, system, and related equipment. Background technique

In a network system, each entity such as a Mobility Management Entity (Mobility Management Entity,

The MME, the Serving Gateway (SGW), and the PDN Gate Way (PGW) all have their own NE identifiers, such as the node identifier (Identity, ID).

Under the guidance of the Long Generation Evolution (LTE), the Third Generation Partnership Project (3GPP) has defined a new mobile communication network architecture, in which:

The Mobility Management Entity (MME) is responsible for the processing of network attached storage (NAS) signaling, including NAS signaling encryption and roaming, tracking functions, assigning temporary identity to user equipment, and security functions; The Serving Gateway (SGW) is responsible for local mobility anchors and lawful interception and other related functions; the Data Gateway (PDW Gateway, PGW) is responsible for performing policy and charging and user plane anchors in non-3GPP handover procedures.

The above MME corresponds to a control plane portion of a Serving GPRS Support Node (SGSN) of a general packet radio service technology within a Universal Mobile Telecommunications System (UMTS); and a PGW/SGW is compared to a general packet radio service technology in a UMTS system. Gateway (Gateway GPRS Support Node, GGSN) function.

In order to enhance the competitiveness of the future network and provide high-quality and stable services to users, 3GPP proposes the concept of mobility management network element resource pool (MME/SGSN POOL). When a node in the resource pool fails, the network side can Switching the user equipment to other normal nodes in the resource pool to reattach, although the user service can be restored as soon as possible, but the user business continuity cannot be guaranteed.

Summary of the invention

The embodiment of the invention provides a node fault processing method, a system and related equipment, and ensures continuity of services on the user equipment when the network node fails.

The embodiment of the invention provides a node fault processing method, which includes:

Receiving a connection establishment request sent by the user equipment;

When the active control node attached to the user equipment fails, acquiring a corresponding index table is stored. The information of the storage node, where the corresponding index table includes a correspondence between the first identification information of the user equipment and the second identification information of the backup control node of the backup user equipment service data; the standby control node is configured to back up the main Using the service data of the current service of the user equipment stored on the control node;

And forwarding, according to the information of the storage node, the connection establishment request to the storage node, so that the storage node sends the connection establishment request to the corresponding standby control node according to the corresponding index table; causing the standby control node to execute The current service of the user equipment.

After the user equipment is attached to the active control node, back up the service data of the current service of the user equipment stored on the active control node;

When the primary control node fails, updating the first resource information allocated to the user equipment to the gateway node according to the information of the gateway node in the backup service data;

Registering information of the local standby control node to the home domain server, and obtaining the latest subscription data of the user equipment from the home domain server;

And updating, by the standby control node, the second resource information allocated by the user equipment to the access network side.

The embodiment of the invention further provides an access network side device, including:

a receiving unit, configured to receive a connection establishment request sent by the user equipment;

An information obtaining unit, configured to acquire information of a storage node that stores a corresponding index table, where the primary control node that is used by the user equipment is faulty, where the corresponding index table includes the first identifier information of the user equipment and the backup user equipment. Corresponding relationship of the second identification information of the standby control node of the service data; the standby control node is configured to back up service data of the current service of the user equipment stored on the active control node;

a connection establishment processing unit, configured to forward the connection establishment request to the storage node according to the information of the storage node acquired by the information acquisition unit, so that the storage node sends the connection establishment request to the corresponding according to the corresponding index table The standby control node causes the standby control node to perform current service of the user equipment.

The embodiment of the invention further provides a control node, including:

a pre-failure backup unit, configured to back up service data of the user equipment stored on the active control node after the user equipment is attached to the active control node; a first resource update unit, configured to: when the primary control node attached to the user equipment fails, the first resource information to be allocated to the user equipment according to the information of the gateway node in the service data backed up by the backup unit before the fault Updating to the gateway node;

a local information update unit, configured to register information of the local standby control node to the home domain server, and obtain latest subscription data of the user equipment from the home domain server;

And a second resource update unit, configured to update the second resource information allocated by the standby control node to the user equipment to the access network side.

The embodiment of the invention further provides a node fault processing system, comprising: a primary control node and a standby control node; wherein:

The primary control node is configured to back up the service data of the current service of the user equipment to the standby control node after the user equipment is attached, and the second identifier information of the user equipment and the second control node of the backup user equipment service data Corresponding index table of the identification information is stored to the storage node;

The standby control node is the aforementioned control node.

In this embodiment, the access network side connected to the user equipment receives the connection establishment request sent by the user equipment, and when the primary control node fails, obtains the information of the storage node that stores the corresponding index table, and sends the connection establishment request to the Storing a node, so that the storage node sends a connection establishment request to the backup control node of the current service data of the user equipment on the backup active control node according to the corresponding node, and the standby control node can perform the current service of the user equipment, thereby ensuring Current business continuity. DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings to be 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 inventive labor.

FIG. 1 is a flowchart of a node fault processing method according to an embodiment of the method of the present invention; FIG. 2B is a flowchart of another node fault processing method provided by an embodiment of the method of the present invention; FIG. 3 is a flowchart of another method for processing a node failure according to an embodiment of the method of the present invention; FIG. 4 is a flowchart of a node failure according to an embodiment of the present invention; Figure 5 is a flowchart of a processing method after a node failure according to another embodiment of the present invention; FIG. 6 is a schematic structural diagram of an access network side device according to an embodiment of the present invention; FIG. 7 is a schematic structural diagram of a control node according to an embodiment of the present invention;

8 is a schematic structural diagram of another control node provided by an embodiment of the device of the present invention;

FIG. 9 is a schematic structural diagram of another control node provided by an embodiment of the device of the present invention.

detailed description

BRIEF DESCRIPTION OF THE DRAWINGS The technical solutions in the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative work are within the scope of the present invention.

A method for processing a node fault according to an embodiment of the method of the present invention. The method in this embodiment is applicable to a user equipment that is in an idle state after the user equipment is attached to the control node, that is, the user equipment is not connected to the active control node. In the network connection system of the current service, when the primary control node, such as the MME or the SGSN, attached to the user equipment fails, the fault processing method performed by the access network side where the user equipment is located, the flowchart is as shown in FIG. :

Step 100: The access network side receives a connection establishment request sent by the user equipment.

It can be understood that when the user equipment initiates a service, the attach request is sent first; and the access network side connected to the user equipment, for example, the base station selects a node as the control node, for example, in all MMEs or SGSNs connected to the base station, Selecting a node corresponding to the smallest node identifier that is greater than the identifier of the user equipment node as the control node, or selecting a node corresponding to the largest node identifier that is smaller than the identifier of the user equipment node as the control node, and attaching the request to the selected control node; the control node receives the attach request After that, the user equipment is authenticated, and the user equipment that passes the authentication is allowed to attach.

During the operation of the user equipment, the control node records service data of the user equipment, including user equipment context data, such as information on the core network side of the current service connection, and information on the access network side. In the embodiment of the present invention, in order to avoid the service discontinuity caused by the handover process of the control node after the failure of the control node, the service data of the user equipment recorded by the control node is backed up to another control node, The control node is the primary control node, and the service data recorded thereon is the primary service data; the other control node is the standby control node, and the service data backed up is the standby service data.

After the user equipment is attached to the active control node, if the current user equipment is in an idle state When there is no connection between the user equipment and the active control node. In some cases, such as a service request or a tracking area update request, the user equipment initiates a connection with the active control node, and then sends a connection establishment request; when the access network side connected to the user equipment receives the connection establishment After the request, the active control node attached to the user equipment is found. If the primary control node is normal, the connection establishment request is sent to the active control node, thereby establishing a connection between the active control node and the user equipment. If the primary control node is faulty, step 101 is performed.

The access network may perform a search according to the node identifier of the user and the node identifier of the active control node, for example, the access network side may be connected to the MME or the SGSN connected to the access network side. In the node, the node corresponding to the minimum node identifier of the user equipment node identifier is selected, or the node corresponding to the largest node identifier of the user equipment node is selected as the active control node.

Step 101: Obtain information about a storage node that stores a corresponding index table, where the corresponding index table includes a correspondence between the first identifier information of the user equipment and the second identifier information of the backup control node of the backup user equipment service data, where the standby control node uses Backing up the service data of the current service of the user equipment stored on the active control node;

In this embodiment, the active control node stores the corresponding index table of the first identifier information of the user equipment and the second identifier information of the backup control node of the backup user equipment service data in another node other than the active control node. On the storage node, for example, it is stored on the predecessor or successor node of the active control node.

The first identification information and the second identification information herein do not indicate the order relationship, but refer to the difference of the identification information, where: the first identification information and the second identification information may be permanent identification information such as an international mobile user identification. International Mobile Subscriber Identification Number (IMSI), Mobile Subscriber International ISDN/PSTN number (MSISDN), or Full Qualified Domain Name (FQDN); or temporary identification information For example, a node identifier based on a distributed hash table (DHT), and the temporary identifier information may further include location information of the area where the user equipment is located, a primary control node type identifier, and the like.

Among them: In the network system, the address of the node forms an "address space loop" in a direction that increases clockwise, and the nodes are distributed on the address space ring according to their node identification values, and the adjacent nodes are precursor successors. Specifically, among the two adjacent nodes, the node with a small node identifier is a precursor node of a node with a large node identifier, and the node with a large node identifier is a successor node of a node with a small node identifier.

When acquiring the information of the storage node, if the storage node is a predecessor or a successor node of the active control node, the access network side may obtain information such as the node identifier of the predecessor or successor node of the active control node.

Step 102: The access network side forwards the connection establishment request to the storage node according to the information of the storage node, so that the storage node sends the connection establishment request to the corresponding standby control node according to the corresponding index table, so that the standby control node performs the current service of the user equipment.

For the standby control node, when the standby control node finds that the primary control node is faulty, it takes over the service on the active control node and performs the current service of the user equipment, specifically: according to the information of the gateway node in the backup service data. The resource information allocated to the user equipment, including user control plane information, a tunnel endpoint identifier (TEID), and the like, is updated to the gateway node; and the information of the local standby control node is registered to the home domain server, from the home domain server. Obtaining the latest subscription data of the user equipment; the standby control node establishes a communication connection with the user equipment through the access network side where the user equipment is located according to the connection establishment request, and allocates the standby control node and the access network to the user equipment by the standby control node. The side agreed information identifying the user equipment, and the second resource information such as the bearer information is updated to the access network side.

It should be noted that the step of taking over the service by the standby control node is a step that can be performed when the standby control node finds that the primary control node is faulty after the user equipment is attached to the active control node, and is in a connected state or an idle state with the user equipment. Nothing. That is, there may be no absolute order relationship before or after the user equipment in the idle state initiates the connection with the active control node.

After receiving the connection establishment request of the storage node, the standby control node establishes a communication connection with the user equipment, such that the core network side (including the standby control node, the gateway node, the home domain server, and the like) and the access network connected to the user equipment The side continues the current service according to the latest subscription data of the user equipment updated by the standby control node and the resource information allocated for the user equipment, and the newly established communication connection with the user equipment, and the current service flow is an existing process. No comments are made here.

It can be seen that, in the embodiment of the present invention, the access network side receives the connection establishment request sent by the user equipment, and when the primary control node attached to the user equipment fails, acquires the information of the storage node that stores the corresponding index table, and forwards the connection establishment. Request to the storage node; the storage node will be based on the corresponding index table stored The connection establishment request is sent to the corresponding standby control node, and the standby control node establishes a communication connection with the user equipment. When the user equipment is in an idle state, the primary control node fails. When the user equipment initiates the next connection with the active control node, the access network side forwards the connection establishment request to the standby control node through the storage node, so that the standby control The node establishes a communication connection with the user equipment, and the current user service is continued by the access network side and the core network side according to the updated data.

In a specific embodiment, in order to facilitate the next connection between the user equipment and the standby control node, the connection establishment request may be forwarded without using the storage node, thereby establishing a connection between the standby control node and the user equipment, and the standby control node re-establishing the user equipment. The node identifier is assigned, and the reassigned node identifier is sent to the user equipment for storage through the access network side. For the access network side, the user equipment is sent for storage as long as the node identifier assigned by the standby control node to the user equipment is received.

Specifically, when the standby control node reassigns the node identifier to the user equipment, the standby control node may select one of the other user equipments within the range of the node identifier of the standby control node, the successor node identifier of the standby control node, or the identifier of the precursor node. The integer value used is used as the reassigned node ID.

In this way, when the next standby control node is connected to the user equipment, the access network side can directly connect to the standby control node through the node identifier of the reassigned user equipment, thereby saving signaling transmission.

Another embodiment of the present invention provides a node fault processing method:

The method of this embodiment is applicable to the network connection system of the current service of the user equipment. When the primary control node, such as the MME or the SGSN, which is attached to the user equipment, fails, the flowchart is as shown in FIG.

Step 110: After the user equipment is attached to the active control node, the standby control node backs up the service data of the current service of the user equipment stored on the active control node.

It can be understood that after the user equipment is attached to the active control node, the active control node selects another control node, that is, the standby control node, to back up the service data of the user equipment stored on the active control node.

When the backup control node performs backup, it can use the timed backup or event-triggered backup to backup.

Step 120: When the primary control node attached to the user equipment fails, the standby control node allocates the standby control node to the user equipment according to the information of the gateway node in the backed up service data. Updating a resource information to a gateway node;

The first resource information updated to the gateway node here is the user information that the gateway node must use in running the service process, including: user control plane information and tunnel endpoint identifier (TEID).

Step 130: The standby control node registers the information of the standby control node to the home domain server, and obtains the latest subscription data of the user equipment from the home domain server.

Step 140: The standby control node updates the second resource information allocated by the standby control node to the user equipment to the access network side. The second resource information that is updated to the access network side is the user information that must be used to access the network side in the running service process, including the information of the user equipment that the standby control node and the access network side agree to identify the user equipment, and the bearer information. .

Here, the first resource information and the second resource information do not indicate an order relationship, but refer to a difference in the allocated resource information.

It can be understood that the active and standby control nodes can detect faults with each other. For example, it can detect whether the other party is faulty by means of heartbeat detection, link detection, and faulty node restart notification. It can also be used by the active/standby control node. Notify the relevant node after the device finds a fault. The specific detection method does not limit the invention.

If the current user equipment is in the connected state, that is, there is a connection between the user equipment and the active control node, when the standby control node finds that the primary control node is faulty, it takes over the service of the user equipment on the active control node, specifically, Through the steps of 120 to 140 above, there is no absolute order relationship between these steps, which can be performed simultaneously or sequentially, and FIG. 1b is only a specific implementation manner. In this way, the user equipment can communicate with the standby control node, and the core network side connected to the user equipment includes the standby control node, the gateway node, and the home domain server, and the access network side respectively allocates the first resource according to the user equipment. The latest subscription data of the information and user equipment, and the second resource information continue the current business. When continuing the current business, the specific process is an existing process and will not be mentioned here. Before performing the process of the foregoing step 140, the standby control node first establishes a connection with the access network side according to the information of the access network side in the backed up service data, and then updates the second resource information.

If the current user equipment is in an idle state, that is, the user equipment is connected to the user equipment and the active control node, when the standby control node finds that the primary control node is faulty, it takes over the user equipment of the active control node. Business, specifically, through the steps of 120 to 130 described above; When the user equipment initiates the connection with the control node again, after the standby control node receives the connection establishment request sent by the user equipment from the storage node, the standby control node establishes the user equipment with the access network side where the user equipment is located according to the received connection establishment request. After the communication connection between the two, the update of the second resource information in step 140 is performed. The process in which the user equipment sends a connection establishment request and is forwarded by the storage node to the standby control node is as shown in FIG. 1a, and is not described here.

It can be seen that, in this embodiment, the standby control node backs up the service data on the active control node. When the primary control node is found to be faulty, the standby control node takes over the current service of the user equipment on the active control node, that is, according to The information of the gateway node is updated to the gateway node for the first resource information allocated by the user equipment; and the information of the local standby control node is registered to the home domain server, and the latest subscription data of the user equipment is obtained from the home domain server; The second resource information allocated by the control node for the user equipment is updated to the access network side. In this way, the standby control node can communicate with the user equipment instead of the above-mentioned active control node. The information of the core network side and the access network side connected to the user equipment can be allocated according to the user equipment. The resource information and the latest subscription data of the user equipment, and the second resource information continue the current service, thereby ensuring the continuity of the current service.

It can be understood that, in a specific embodiment, the standby control node can reassign a node identifier to the user equipment and send it to the user equipment for storage. The standby control node may re-allocate the node identifier according to the node identifier of the standby control node and use the DHT-based method, specifically: may be in the node identifier of the standby control node, and may be within the range of the succeeding node identifier of the standby control node. Select an integer value that is not used by other user equipments as the reassigned node identifier. You can also select one of the node identifiers of the standby control node and the precursor node identifier of the standby control node to select one that is not used by other user equipments. The integer value is used as the reassigned node ID.

The standby control node allocates a node identifier adjacent to the node identifier of the standby control node to the user equipment, and when the user equipment initiates the next connection with the control node (such as a service request or a tracking area update request), the user equipment The access network side can directly select the smallest (or largest) node identifier that is greater than (or less than) the new node identifier of the user equipment according to the new node identifier of the user equipment, that is, find the standby control node, and send a connection establishment request to the standby. The control node performs a connection between the standby control node and the user equipment, and does not find the faulty active control node to connect. In order to save resources, the standby control node sends a delete request message to the storage node after the node identifier is reassigned to the user equipment, so that the storage node deletes the first identifier information of the stored user equipment and the node that backs up the user equipment service data. A corresponding index table of the two identification information. When the delete request message is sent, the standby control node may obtain the node identifier of the storage node according to the original node identifier of the user equipment, that is, the storage node is the predecessor or the successor node corresponding node identifier of the faulty active control node, and the fault is used mainly. The control node is a predecessor or a successor node corresponding to the node identifier of the original node of the user equipment; and sends a delete request message.

In another specific embodiment, after the standby control node takes over the service of the active control node, in the current connection between the user equipment and the standby control node, the standby control node may not need to re-allocate a node identifier for the user equipment, but waits for When the user equipment initiates the next connection with the control node, after the user equipment sends the connection establishment request message, and the access network side finds that the primary control node is faulty, the connection establishment request message is sent to the storage node storing the corresponding index table. , that is, the precursor or successor node of the failed primary control node;

After receiving the connection establishment request message, the storage node obtains the node identifier of the standby control node according to the locally stored corresponding index table, and sends a connection establishment request message to the standby control node identifier.

When the standby control node receives the connection establishment request message sent by the storage node according to the corresponding index table, establishes a connection with the access network side where the user equipment is currently located; the standby control node reassigns a node identifier to the user equipment, and re-allocates The node identifier is sent to the user equipment for storage; where the user equipment node identifier is reassigned, the standby control node may obtain another node identifier according to the node identifier of the standby control node and adopt a DHT-based method, as described above. I will not repeat them here.

After the user equipment node identifier is reassigned, the standby control node sends a delete request message to the storage node, so that the storage node deletes the first identifier information of the stored user equipment and the second identifier of the node that backs up the user equipment service data. Corresponding index table of information.

It can be understood that, in other specific embodiments, the standby control node may not reassign a node identifier to the user equipment, and when the user equipment initiates the connection with the active control node, the storage node acquires the storage node. The information is forwarded by the storage node to the standby control node to establish a communication connection between the standby control node and the user equipment. In this case, it is not You need to delete the corresponding index table on the storage node to ensure that the current service of the user equipment continues.

In other specific embodiments, in order to ensure the continuity of the current service, after the standby control node takes over the current service of the user equipment, the node identifier of another standby control node may be obtained, and the service data of the current service of the user equipment is backed up to another The backup control node stores the identification information of the other standby control node and the current identification information of the user equipment to another storage node, for example, to a predecessor or a successor node of the standby control node that takes over the current service of the user equipment. In this way, when the standby control node fails, the other standby control node selected performs the fault processing according to the above method, and ensures the continuity of the current service of the user equipment.

(1) When obtaining the node identifier of another alternate control node:

The standby control node may first select the node with the least load as the other standby control node based on the current load condition of each node, and obtain the node identifier; or may receive the node identifier of another standby control node selected by the other network element device.

(2) When performing backup of business data:

It can be a scheduled backup or an event-triggered backup. When a scheduled backup is used, a data synchronization timer is started between the standby and another standby control node. When the timer expires, the backup of the service data is completed. When the service data of the current service of the user equipment recorded on the standby control node changes, such as the user equipment completes the attachment, separation, or the user equipment to perform tracking area update (TAU) or the creation of the user equipment data caused by the handover. When isochronous, a backup of another alternate control node is triggered.

The standby control node sends a data backup request message to another standby control node. If another standby control node agrees to perform backup, a data transmission channel is established between the two to perform transmission and backup of service data. The standby control node may also include the service data in the data backup request message and send it to another standby control node. When the user equipment is detached, the standby control node is responsible for deleting the service data of the user equipment, and notifying another standby control node to delete the service data of the corresponding user equipment.

(3) When the predecessor or successor node of the standby control node stores the corresponding index table:

The standby control node sends a new request message to another storage node, such as a predecessor or a successor node of the standby control node, and requires that the identification information of the other standby control node be stored in the storage node corresponding to the current identification information of the user equipment to another storage node. , in other processes such as location updates between control nodes, etc. The process also occurs with the creation of the corresponding index table;

When the user equipment is detached, or the user equipment moves to another location area, the corresponding index table on another storage node needs to be deleted, and the standby control node sends a delete request message to another storage node, requesting to delete the storage. Corresponding index table;

The standby control node may perform fault detection on another standby control node. When another standby control node fails, another node other than the standby control node is selected as the backup node, so that the corresponding index table changes. The standby control node sends an update request message to another storage node, requesting corresponding changes to the stored corresponding index table.

It should be noted that, when referring to the selection of the primary control node, the access network side selects the node corresponding to the smallest (or largest) node identifier that is greater than (or is less than) the user equipment node identifier, that is, the successor of the user equipment (or The predecessor node is used as the primary control node, and the storage node corresponding to the index table is the successor (or predecessor) node of the active control node; when the standby control node reassigns the node identifier of the user equipment, the standby control node needs to select the standby control node. The node identifies an integer value in the predecessor (or subsequent) node of the standby control node as the reassigned node identifier, so that the access network side can find the node identifier of the standby control node according to the reassigned user equipment node identifier. That is to say, in the process of node fault processing, the method of searching for nodes needs to be unified, which simplifies the processing of network nodes.

A node fault processing method provided by an embodiment of the method of the present invention:

In the method of this embodiment, the network connection system of the current service of the user equipment is a new mobile communication network architecture, and the control node attached by the user is the MME.

(1) As shown in Figure 2, when the user equipment initiates a service, and the primary MME does not fail:

201. The user equipment establishes a radio resource control protocol (RRC) connection with the base station (e B ), and sends RRC signaling that carries an attach request message to the eNB.

For the user equipment that is initially attached, the user equipment permanent identifier may be carried in the RRC parameter and sent to the eNB, so that the eNB obtains the permanent identifier of the user equipment, where the permanent identifier of the user equipment may be an IMSI, an MSISDN, or a full-name domain name FQDN.

202. The eNB performs a hash calculation on the permanent identifier of the user equipment, and obtains the user equipment. The node identifier, or e B, directly selects the primary MME according to the temporary identifier assigned to the user equipment by the network side, and sends an attach request to the primary MME.

The temporary identifier of the user equipment here is the identification information that is allocated to the user equipment by the network side after the user equipment is attached once.

For the user equipment that is initially attached, the eNB may first calculate the node identifier of the user equipment according to the permanent identifier of the user equipment. User equipment that is not initially attached may directly use the user equipment node identifier in its temporary identity. When calculating the node identifier of the user equipment, the Hash function operation may be performed on the permanent identifier of the user equipment, and the obtained hash calculation value is the node identifier of the user equipment.

The eNB selects, among all the MMEs connected to the eNB, the smallest node whose node identifier is greater than the identity of the user equipment node as the primary MME to which the user equipment is attached, and sends the attach request message together with the node identifier of the user equipment to the active MME node. The node identifiers of all the MMEs connected to the eNB may be obtained during the interaction between the MME and the eNB. For example, during the new connection between the eNB and the MME, the MME may use the S1 New Response (SETUP RESPONSE) message or the configuration update (CONFIGURATION). The UPDATE message sends the node identifier added or to be deleted by the MME to the eNB.

203. After receiving the attach request, the active MME performs a process of authentication, encryption, and integrity protection of the user equipment.

For the user equipment through which the authentication is passed, the primary MME allocates resources for the user equipment and creates a user equipment context. In addition, the primary MME sends a Location Update Request (Update Location Request) message to the Home Subscriber Server (HSS), registers the address information of the primary MME, and downloads the subscription data of the user equipment.

204. The core network side allocates resources. In this embodiment, the core network side includes: HSS, MME, and SGW/PGW.

Specifically, the primary MME selects the SGW based on the location information of the user equipment, and sends a bearer setup request message to the SGW, and carries the primary MME control plane address, the tunnel end identifier (TEID), the PGW address, and the default. Quality of Service (QoS), User Location Information (ECGI), Maximum Access Point Limit (Maximum APN Restriction), and Dual Address Bearer Flag, User Equipment Information Update MS Info Change Reporting support indication Wait for the cell;

The SGW receives the bearer setup request message, creates a user equipment context, and forwards the bearer setup request message to the PGW according to the address of the PGW, and includes the TEID, the bearer identifier (EPS Bearer Identity), and the ECGI and the like in the forwarded bearer setup request message. The PGW returns a bearer setup response message to the SGW, and carries information such as the PGW user plane address and the TEID and the EPS bearer ID. The SGW forwards the bearer setup response message to the active MME.

If a dynamic policy generation mechanism is adopted, the PGW interacts with a Policy and Charging Rule Function (PCRF). The PCRF sends a Policy Control and Charging (PCC) rule to the PGW, including the QoS of the bearer, such as bandwidth, delay, packet loss rate, Type of Service (ToS), and differentiated service code. Differentiated Services Code Point (DSCP) and QoS Class Identifier (QCI).

205. The eNB allocates resources on the access network side.

Specifically, the primary MME stores the resource information allocated by the core network, such as the SGW and the PGW address and the TEID, and sends the user plane parameters allocated by the SGW to the eNB; the eNB creates a radio bearer for the user equipment, and allocates the radio resource; The primary MME reports the radio access bearer parameters allocated by the eNB to the SGW, thereby establishing a user plane tunnel between the eNB and the SGW.

After the user equipment is successfully attached, the active MME uses the node identifier of the user equipment as part of the temporary identifier of the user equipment or the temporary identifier of the user equipment to attach the response ( Attach

Response ) The message is sent to the user device for storage.

207. After the user equipment context is established, the active MME node synchronizes the user equipment context data to the backup to the standby MME. The standby MME may be selected by the primary MME node according to the load condition of other MME nodes, for example, selecting the node with the lowest current load as the backup node; or selected by other network elements.

Data backup can be a scheduled backup or an event triggered backup. The primary MME sends the service data of the current service of the user equipment, that is, the user equipment context, to the backup MME for backup. The primary and secondary MMEs record the identity of the other node, such as the node identifier or network protocol address.

After the user equipment is detached, the primary MME may notify the standby MME node to delete the corresponding user equipment context data; and after the standby MME node fails, the primary MME node may reselect the new alternate MME. 208. The primary MME exchanges with the subsequent MME node, and sends a corresponding index table to the subsequent MME for storage. After the user equipment context data newly created by the primary MME is used, the user equipment may be sent a request message to the subsequent MME, and the subsequent MME is required to store the corresponding index table, that is, the correspondence between the identification information of the user equipment and the identifier information of the standby MME. .

When the primary MME finds that the standby MME node of the user equipment changes (for example, the backup node fails), the user equipment index table request message is sent to the subsequent MME, and the identifier of the standby MME in the corresponding index table of the user equipment is required to be changed. After the primary MME deletes the user equipment context data, it may send a delete user equipment index table request message to its successor MME, and delete the corresponding index table of the user equipment.

(2) As shown in Figure 3, after the primary MME fails, the current user equipment is in the connected state:

209-211. When the standby MME finds that the primary MME is faulty, it takes over the user service on the primary MME. When the eNB finds that the primary MME is faulty, the node identifier of the faulty MME may be marked.

When the user service on the primary MME is taken over: the standby MME sends an Update Location Request message to the HSS, registers the node identifier of the standby MME to the HSS, and downloads the latest subscription data of the user equipment from the HSS; The SGW address in the context data is sent a parameter update request message, such as a Modify Bearer Request message, to the SGW, where the resource information such as the control plane address and the TEID allocated by the standby MME for the user equipment is carried.

For the connected mode user equipment, the standby MME node establishes an S1 connection with the eNB according to the access network side of the user equipment context data, that is, the information of the eNB where the user equipment is located, and sends the resource information allocated by the standby MME to the eNB.

Through the steps 209-211, the user equipment can communicate with the standby MME, and the core network side and the access network side can continue the current service according to the resource information allocated for the user equipment and the latest subscription information of the user equipment.

The standby MME reassigns the node identifier to the user equipment that is currently in the connected state. For example, in the standby MME node identifier and the predecessor MME node identifier of the standby MME, an integer value that is not used by another user equipment may be selected as the reallocation. Node ID and send it to the user device for storage; The standby MME sends a delete user equipment index table request message to the successor MME of the faulty node, and the node identifier of the successor MME can be found based on the original node identifier of the user equipment, that is, in all the node identifiers of the node that has not failed, which is greater than the original user equipment. The minimum node identifier of the node identifier is the successor MME node identifier of the faulty node.

213. The standby MME sends the service data of the user equipment to another backup MME0 for backup, and stores the identifier information of the user equipment and the identifier information of the standby MME0 on the backup node of the standby MME.

It can be understood that the step 212 is an optional step. If the standby MME does not assign a new node identifier to the user equipment, the next step of the user equipment to initiate the connection with the active MME may be implemented by the following steps. The flow indicated by the dashed arrow:

214. The user equipment sends an access request message, such as a service request message (Server Request) or a tracking area update request (TAU Request) message, to the eNB, and requests to connect with the active MME.

215. The eNB finds the primary MME based on the node identifier of the user equipment, and finds that the primary MME is faulty, and establishes a connection with the subsequent MME node of the faulty node, and sends a connection establishment request message to the successor.

MME.

216. The subsequent MME node searches for a corresponding index table of the identifier information of the user equipment and the identifier information of the standby MME, obtains the node identifier of the standby MME, and then forwards the connection establishment request message to the standby MME.

217. The standby MME performs authentication authentication of the user equipment. If the authentication succeeds, the eNB establishes a connection with the user equipment by using the eNB. The information such as the SGW user plane address and the TEID is sent to the eNB, and the eNB allocates radio resources to the user equipment.

The standby MME reassigns the new node identifier to the user equipment and sends it to the user equipment. In the subsequent connection, the eNB may connect to the standby MME based on the new node identifier of the user equipment.

218. The standby MME sends a message that deletes the user equipment index table information to the MME of the faulty active MME, where the MME carries the information such as the permanent identifier of the related user equipment or the original node identifier, and the MME is required to delete the corresponding index table.

The method embodiment of the present invention further provides a node fault processing method:

In the method of this embodiment, the network connection system of the current service of the user equipment is a UMTS network system, The control node to which the user attaches is the SGSN.

(1) As shown in FIG. 4, when the user equipment initiates a service and the primary SGSN fails: 301. The user equipment sends an attach request to a Radio Network Controller (RNC).

The user equipment sends the temporary identifier of the user equipment to the RNC, and the user equipment sends the temporary identifier to the RNC. For the user equipment that is not initially attached, the user equipment sends the temporary identifier to the RNC. The temporary identifier is assigned to the user equipment by the network side.

302. The RNC calculates the node identifier of the user equipment based on the permanent identifier of the user equipment, or directly selects the user equipment node identifier in the temporary identifier of the user equipment, and sends the attach request to the primary SGSN.

For the first-time attached user equipment, the RNC can first calculate the node identifier of the user equipment according to the permanent identifier of the user equipment. For the non-first-time attached user equipment, the node identifier of the user equipment in the temporary identifier is directly used. When calculating the node identifier of the user equipment, the Hash function calculation may be performed on the permanent identifier of the user equipment, and the obtained hash calculation value is the node identifier of the user equipment.

The RNC selects, among all the SGSNs connected to the RNC, the smallest node whose node identifier is greater than the node identifier of the user equipment as the attached primary SGSN of the user equipment, and sends the attach request message together with the node identifier of the user equipment to the primary SGSN node. . The node identifiers of all the SGSNs connected to the RNC can be obtained during the interaction between the SGSN and the RNC. For example, the SGSN can be sent to the RNC in a message such as a INFORMATION TRANSFER INDICATION.

303. After receiving the attach request, the active SGSN performs a process of authentication, encryption, and integrity protection of the user equipment.

For the user equipment through which the authentication is passed, the active SGSN creates a user equipment context, and sends a location update request message to the Home Location Register (HLR), registers the address information of the primary SGSN, and downloads the subscription of the user equipment. data.

After the user equipment is successfully attached, the active SGSN sends the node identifier of the user equipment as part of the temporary identifier of the user equipment or the temporary identifier of the user equipment to the user equipment for storage. 305. After the user equipment context is established, the active SGSN node synchronizes the user equipment context data, that is, the service data, to the backup to the standby SGSN.

Data backup can be a scheduled backup or an event triggered backup. The active SGSN sends the service data of the current service of the user equipment, that is, the user equipment context, to the backup SGSN for backup. The primary and secondary SGSNs record the identity of the other node, such as the node identifier or network protocol address.

After the user equipment is detached, the primary SGSN may notify the standby SGSN node to delete the corresponding user equipment context data; and after the standby SGSN node fails, the primary SGSN node may reselect the new alternate SGSN.

306. The primary SGSN interacts with its subsequent SGSN node, and sends a corresponding index table to the subsequent SGSN for storage. After the user equipment context data newly created by the SGSN is used, the user equipment index table request message may be sent to the subsequent SGSN, and the subsequent SGSN is required to store the corresponding index table, that is, the correspondence between the identifier information of the user equipment and the identifier information of the standby SGSN.

When the primary SGSN detects that the standby SGSN node of the user equipment changes, it sends a change user equipment index table request message to its successor SGSN, requesting to change the identity information of the standby SGSN in the corresponding index table of the user equipment; when the primary SGSN deletes a user After the device context data is sent, the user equipment index table request message may be sent to the subsequent SGSN, and the corresponding index table of the user equipment is deleted.

(2) As shown in Figure 5, after the primary SGSN fails, the current user equipment is in the connected state:

307-309. When the standby SGSN finds that the primary SGSN is faulty, it takes over the user service on the primary SGSN.

When the user service on the primary SGSN is taken over: the standby SGSN sends a location update request message to the HLR, registers the node identifier of the standby SGSN to the HLR, and downloads and obtains the latest subscription data of the user equipment from the HLR; a GGSN address, a parameter update request message, such as an Update PDP Context Request message, is sent to the GGSN, where the resource information allocated by the standby SGSN for the user equipment, such as the control plane address and the TEID, is used by the standby SGSN node according to the user equipment context. The access network side of the data is the information of the RNC where the user equipment is located, establishes a connection with the RNC, and sends the resource information allocated by the standby SGSN. To RNC:.

Through steps 307 to 309, the user equipment can communicate with the standby SGSN and continue the current service according to the resource information allocated for the user equipment.

310. The standby SGSN reassigns the node identifier to the user equipment that is currently in the connected state, and sends the new node identifier to the user equipment for storage. When the backup SGSN sends the delete user equipment index table request message to the succeeding SGSN of the faulty node, the succeeding SGSN The node identifier can be found based on the original node identifier of the user equipment. For example, in the node identifier of all the normal nodes, the node identifier that is greater than the original node identifier of the user equipment is the node identifier of the successor SGSN of the faulty node.

311. The standby SGSN sends the service data of the user equipment to another standby SGSN0 for backup, and stores the identifier information of the user equipment and the identifier information of the standby SGSN0 on the backup node of the standby SGSN.

It can be understood that the step 310 is an optional step. If the standby SGSN does not assign a new node identifier to the user equipment, the next step of the user equipment to initiate the connection with the active SGSN may be implemented by the following steps. The flow indicated by the dashed arrow:

312. The user equipment sends an access request message, such as a service request message, or a tracking area update request message, to the RNC, and requests to connect with the active SGSN.

313. The RNC finds the primary SGSN based on the node identifier of the user equipment, and finds that the primary SGSN is faulty, and establishes a connection with the succeeding SGSN node of the faulty node, and sends a connection establishment request message to the subsequent SGSN.

314. The subsequent SGSN node searches for a corresponding index table of the identifier information of the user equipment and the identifier information of the standby SGSN, obtains the node identifier of the standby SGSN, and then forwards the connection establishment request message to the standby SGSN.

315. The standby SGSN authenticates the user equipment. If the authentication succeeds, the RNC establishes a connection with the user equipment through the RNC, and the RNC allocates the radio resource to the user equipment.

The standby SGSN reassigns the new node identifier to the user equipment and sends it to the user equipment. In the subsequent connection, the RNC can connect to the standby SGSN based on the new node identifier of the user equipment.

316. The backup SGSN sends a message that deletes the user equipment index table information to the successor SGSN of the primary SGSN, where the information about the permanent identifier or the original node identifier of the related user equipment is carried, and the subsequent SGSN is required to delete the corresponding corresponding index table. An embodiment of the present invention provides a device for accessing a network side device, such as an RNC or an eNB, and a schematic structural diagram is shown in FIG. 6 , including:

The receiving unit 11 is configured to receive a connection establishment request sent by the user equipment;

The information obtaining unit 12 is configured to: when the receiving unit 11 receives the connection establishment request, acquire the information of the storage node that stores the corresponding index table when the primary control node fails, and the corresponding index table includes the first identification information of the user equipment and the backup user. Corresponding relationship of the second identification information of the standby control node of the service data of the device; the standby control node is configured to back up the service data of the current service of the user equipment stored on the active control node;

The connection establishment processing unit 13 is configured to forward the connection establishment request to the storage node according to the information of the storage node acquired by the information acquisition unit, so that the storage node sends the connection establishment request to the corresponding standby control node according to the corresponding index table, so that the standby control The node performs the current service of the user equipment.

Specifically, the standby control node establishes a communication connection with the user equipment by accessing the network side; and the access network side and the core network side connected to the user equipment are respectively based on a newly established communication connection with the user equipment, and standby control The resource information allocated by the node for the user equipment and the latest subscription data of the user equipment continue the current service.

In the access network side device of the embodiment of the present invention, when the receiving unit 11 receives the connection establishment request sent by the user equipment, when the primary control node attached to the user equipment fails, the information acquiring unit 12 acquires the storage corresponding index table. The information of the storage node, the connection establishment processing unit 13 forwards the connection establishment request to the storage node, and the storage node sends the connection establishment request to the corresponding standby control node according to the stored corresponding index table, and the standby control node establishes with the user equipment. Communication connection between. When the user equipment is in an idle state, the primary control node fails. When the user equipment initiates the next connection with the active control node, the access network side forwards the connection establishment request to the standby control node through the storage node, so that the standby control The node establishes a communication connection with the user equipment, and the current user service is continued by the access network side and the core network side according to the updated data.

In a specific embodiment, the access network side device further includes:

The primary search unit 14 is configured to select, as the active control node, a node corresponding to the smallest node identifier that is greater than the identifier of the user equipment node among all the control nodes that are connected to the access network, and the information acquiring unit 12 is specifically configured to obtain the primary use. The node ID of the successor node of the control node; or, When the primary search unit 14 selects the node corresponding to the largest node identifier of the user equipment node identifier as the active control node among all the control nodes connected to the access network side, the information acquiring unit 12 is specifically configured to obtain the active control node. The node ID of the precursor node.

The redistribution sending unit 15 is configured to receive a node identifier of the reassigned user equipment sent by the standby control node, and send the reassigned node identifier to the user equipment for storage.

It can be understood that, when the receiving unit 11 in the access network side device of the embodiment receives the connection establishment request, and has confirmed that the active control node is faulty, the information acquiring unit 12 acquires the information of the storage node; if not yet confirmed If the primary control node is faulty, the primary search node 14 is required to search for the primary control node. In the process of performing the search, if the node corresponding to the minimum node identifier is used as the primary control node, the information acquiring unit 12 acquires the primary control node. The node identifier of the successor node of the node, if the node corresponding to the largest node identifier is used as the primary control node, the information acquisition unit 12 acquires the node identifier of the precursor node of the active control node.

After the connection between the standby control node and the user equipment is established, the standby control node may re-allocate a node identifier for the user equipment, and the allocated node identifier is sent to the user equipment for storage by the redistribution sending unit 15, so that the user equipment initiates the next connection. The access network side device can directly find the standby control node according to the reassigned node identifier, instead of forwarding through the storage node.

The embodiment of the present invention further provides a control node. The control node in this embodiment may be an MME or an SGSN. The node fault is processed according to the process in the first embodiment. :

The pre-failure backup unit 20 is configured to back up service data of the user equipment stored on the active control node after the user equipment is attached to the active control node;

The first resource update unit 21 is configured to: when the primary control node attached to the user equipment fails, update the first resource information allocated to the user equipment according to the information of the gateway node in the service data backed up by the backup unit 20 before the fault Gateway node

The local information update unit 22 is configured to register information of the standby control node to the home domain server, and obtain latest subscription data of the user equipment from the home domain server;

The second resource update unit 23 is configured to update the allocated second resource information of the local standby control node to the access network side. It can be understood that the control node of this embodiment may further include an establishing unit, configured to establish a connection with the access network side according to the information of the access network side in the service data backed up by the backup unit 20 before the fault, and then the second resource update unit. 23 Perform an update of the second resource.

Or a establishing unit, configured to: after receiving the connection establishment request sent by the user equipment from the storage node, establish a communication connection with the user equipment by accessing the network side according to the connection establishment request, and then performing the second by the second resource update unit 23 Update of resources.

In the control node of the embodiment, the backup unit 20 backs up the service data on the active control node, and when the primary control node is found to be faulty, the standby control node takes over the user equipment service on the active control node. That is, the first resource update unit 21 updates the first resource information allocated for the user equipment to the gateway node according to the information of the gateway node; the local information update unit 22 registers the information of the standby control node to the home domain server, from the home domain server. The latest subscription data of the user equipment is obtained. For the connected user equipment, the second resource update unit 23 sends the second resource information allocated by the standby control node to the access network side. In this way, the standby control node can communicate with the user equipment in place of the above-mentioned active control node. The information of the core network side and the access network side connected to the user equipment can be allocated according to the user equipment, respectively, because the information in the service running process is not lost. The first resource information and the latest subscription data of the user equipment, and the second resource information continue the current service, thereby ensuring the continuity of the current service.

Referring to FIG. 8, in other specific embodiments, the control node of this embodiment may further include: an allocation processing unit 24, configured to re-allocate the node identifier for the user equipment, and send the re-allocated node identifier to the user The device performs storage; so that the access network side finds the local standby control node according to the reassigned node identifier, and performs the next connection between the user equipment and the local standby control node.

The deleting unit 25 is configured to send a delete request message to the storage node, so that the storage node deletes the corresponding index table of the first identifier information of the stored user equipment and the second identifier information of the node that backs up the user equipment service data.

The backup unit 26 is configured to select another standby control node for the user equipment, and back up the service data of the current service of the user equipment to another selected standby control node.

The index table storage unit 27 is configured to store the identification information of another standby control node selected by the backup unit 26 and the identification information of the user equipment to another storage node. In the control node of the embodiment, after the establishing unit establishes the connection with the access network side, the reassigned node identifier may be sent to the user equipment through the access network side by the allocation processing unit 24, so that the user equipment is initiated. When the connection is made, the access network side can directly find the standby control node by using the reassigned node identifier; and the corresponding index table stored on the storage node is deleted by the deleting unit 25, which can save resources. In order to make the continuity of the service after the fault processing, the backup unit 26 backs up the current service data of the user equipment to another standby control node, and the index table storage unit 27 identifies the identification information of the other standby control node with the current user equipment. The identification information is stored on another storage node.

Referring to FIG. 9, in other specific embodiments, the control node may include a pre-failure backup unit 20, a first resource update unit 21, a local information update unit 22, a second resource update unit 23, a delete unit 25, and an establishment request. The receiving unit 18, the connection establishing unit 29, the allocating unit 30 and the corresponding storage unit 31, wherein:

The establishment request receiving unit 28 is configured to receive a connection establishment request sent by the storage node according to the corresponding index table, where the corresponding index table includes a correspondence between the first identification information of the user equipment and the second identification information of the node that backs up the service data of the user equipment;

The connection establishing unit 29 is configured to establish a connection with the user equipment according to the connection establishment request received by the establishment request receiving unit 28 through the access network side;

The allocating unit 30 is configured to re-allocate the node identifier of the user equipment, and send the re-assigned node identifier to the user equipment for storage by using the connection established by the connection establishing unit 29;

The corresponding storage unit 31 is configured to store the identification information of the other user equipment and the corresponding information of the backup control node of the service data on the active control node attached to the other user equipment.

When the user equipment initiates the next connection with the active control node, in the control node of this embodiment: after the setup request receiving unit 28 receives the connection establishment request, the connection establishment unit 29 establishes a connection with the user equipment. The allocating unit 30 may reassign a node identifier to the user equipment, and send the reassigned node identifier to the user equipment through the connection established by the connection establishing unit 29.

In order to save resources, the control node in this embodiment deletes the corresponding index table stored on the original storage node by the deleting unit 25. It is also possible to correspond to other user equipments of the storage unit 31 in the running process of the service.

The embodiment of the invention further provides a node fault processing system, comprising: an active control node and a standby Control node; where:

The standby control node is the control node shown in any of Figures 7-9.

The embodiment of the present invention further provides a node fault processing system, which includes an active control node, an alternate control node, and an access network side device to which the user equipment belongs, where:

The primary control node is configured to back up the service data of the current service of the user equipment to the standby control node after the user equipment is attached, and the second identifier information of the user equipment and the second control node of the backup user equipment service data The corresponding index table of the identification information is stored to the storage node; the standby control node is the control node as shown in any of FIGS. 7 to 9; and the access network side device is the device as shown in FIG. 6. In this embodiment, the access network side connected to the user equipment receives the connection establishment request sent by the user equipment, and when the primary control node fails, obtains the information of the storage node that stores the corresponding index table, and sends the connection establishment request to the The storage node is configured to send a connection establishment request to the standby control node of the current service data of the user equipment on the backup active control node according to the corresponding connection table, and the standby control node establishes a connection with the user equipment after receiving the connection establishment request. In this way, the standby control node communicates with the user equipment instead of the above-mentioned active control node. Since the information in the service running process is not lost, the access network side and the core network side respectively connect according to the newly established communication connection with the user equipment. The resource information allocated by the user equipment and the latest subscription data continue the current service, thereby ensuring the continuity of the current service.

A person skilled in the art may understand that all or part of the various steps of the foregoing embodiments may be completed by a program instructing related hardware. The program may be stored in a computer readable storage medium, and the storage medium may include: ROM, RAM, disk or CD, etc.

The description of the above embodiments is only for helping to understand the method of the present invention and its core ideas; at the same time, for those skilled in the art, according to the idea of the present invention, there will be changes in specific embodiments and applications. In summary, the content of the specification should not be construed as limiting the invention.

Claims

Rights request

A node fault processing method, comprising:

Receiving a connection establishment request sent by the user equipment;

When the primary control node to which the user equipment is attached is faulty, the information about the storage node that stores the corresponding index table is obtained, where the corresponding index table includes the first identification information of the user equipment and the standby control of the backup user equipment service data. Corresponding relationship of the second identification information of the node; the standby control node is configured to back up service data of the current service of the user equipment stored on the active control node;

And forwarding, according to the information of the storage node, the connection establishment request to the storage node, so that the storage node sends the connection establishment request to the corresponding standby control node according to the corresponding index table, so that the standby control node executes the The current service of the user equipment.

2. The method according to claim 1, wherein the performing, by the standby control node, the current service of the user equipment comprises:

When the primary control node fails, the standby control node updates the first resource information allocated to the user equipment to the gateway node according to the information of the gateway node in the backup service data; The information of the local standby control node is registered to the home domain server, and the latest subscription data of the user equipment is obtained from the home domain server;

The standby control node establishes a communication connection with the user equipment by the access network side where the user equipment is located according to the connection establishment request, and updates the second resource information allocated by the standby control node to the user equipment to the Access to the network side;

The access network side and the core network side connected to the user equipment respectively continue the current service according to the communication connection, the latest subscription data of the user equipment, and the resource information allocated by the standby control node for the user equipment.

The method of claim 1, wherein before the standby control node performs the current service of the user equipment, the method further includes: after the user equipment is attached to the active control node, the backup control node backup office The service data of the current service of the user equipment stored on the active control node is described.

The method of claim 1, wherein the obtaining, before the storing the information of the storage node corresponding to the index table, further comprises: selecting, among all the control nodes connected to the access network side, that the information is greater than the user equipment. The information about the storage node storing the corresponding index table is obtained by obtaining the information of the storage node that stores the corresponding index table, and the following information is obtained: obtaining the successor of the active control node. The node ID of the point; or,

Before the obtaining the information of the storage node corresponding to the index table, the method further includes: selecting, as the active control node, a node corresponding to the largest node identifier that is smaller than the identifier of the user equipment node, among all the control nodes connected to the access network side; The obtaining the information of the storage node that stores the corresponding index table specifically includes: obtaining the node identifier of the precursor node of the primary control node.

The method according to any one of claims 1 to 4, further comprising: receiving a node identifier of the reassigned user equipment sent by the standby control node, and sending the reassigned node identifier The user equipment is stored.

The method according to claim 5, wherein the node identifier of the reassigned user equipment is: a node identifier of the standby control node at the standby control node, and a subsequent node identifier of the standby control node Or within the scope of the predecessor node identification, select an integer value that is not used by other user equipment as the reassigned node identifier.

7. A node fault processing method, comprising:

The method of claim 7, wherein the updating the second resource information that is allocated by the standby control node to the user equipment to the access network side further includes:

Establishing a connection with the access network side according to the information of the access network side in the backed service data; or

A connection establishment request sent by the access network side is received, and a communication connection with the user equipment is established by the access network side where the user equipment is located.

9. The method of claim 7, further comprising:

Reassigning the node identifier to the user equipment, and sending the reassigned node identifier to The user equipment performs storage; so that the access network side searches for the local standby control node according to the reassigned node identifier, and performs the next connection between the user equipment and the standby control node.

10. The method of claim 7, further comprising:

Receiving a connection establishment request sent by the storage node according to the corresponding data table, where the corresponding index table includes a correspondence between the first identification information of the user equipment and the second identification information of the node that backs up the user equipment service data;

Establishing a connection with the user equipment through the access network side according to the connection establishment request.

The method of claim 10, further comprising:

Reassigning the node identifier to the user equipment; and transmitting the reassigned node identifier to the user equipment for storage by using the access network side.

The method according to claim 9 or 11, wherein the reassigning the node identifier to the user equipment specifically includes:

Within the range of the node identifier of the standby control node, to the successor node identifier or the precursor node identifier of the alternate control node, an integer value that is not used by other user equipments is selected as the reassigned node identifier.

13. The method of claim 12, further comprising:

And sending a delete request message to the storage node, so that the storage node deletes the stored first identifier information of the user equipment and the corresponding index table of the second identifier information of the node that backs up the user equipment service data.

The method according to any one of claims 7 to 11, further comprising: acquiring a node identifier of another standby control node, and backing up service data of the current service of the user equipment to the another On the standby control node;

The identification information of the another standby control node is stored on the other storage node corresponding to the current identification information of the user equipment.

15. An access network side device, comprising:

An information obtaining unit, configured to acquire information of a storage node that stores a corresponding index table, where the primary control node that is used by the user equipment is faulty, where the corresponding index table includes the first identifier information of the user equipment and the backup user equipment. Corresponding to the second identification information of the standby control node of the service data The standby control node is configured to back up service data of a current service of the user equipment stored on the active control node;

The device according to claim 15, further comprising:

The primary search unit is configured to select, as the active control node, a node corresponding to the smallest node identifier that is greater than the identifier of the user equipment node, among all the control nodes that are connected to the access network side, where the information acquiring unit is specifically configured to obtain a node identifier of a successor node of the primary control node; or

The primary search unit is configured to select, as the active control node, a node corresponding to the largest node identifier that is smaller than the identifier of the user equipment node among all the control nodes that are connected to the access network side, where the information acquiring unit is specifically configured to obtain The node identifier of the precursor node of the primary control node.

The device according to claim 15 or 16, further comprising:

And a redistribution sending unit, configured to receive a node identifier of the reassigned user equipment sent by the standby control node, and send the reassigned node identifier to the user equipment for storage.

18. A control node, comprising:

a pre-failure backup unit, configured to back up service data of the user equipment stored on the active control node after the user equipment is attached to the active control node;

a first resource update unit, configured to: when the primary control node attached to the user equipment fails, the first resource information to be allocated to the user equipment according to the information of the gateway node in the service data backed up by the backup unit before the fault Updating to the gateway node;

The node according to claim 18, further comprising:

An allocation processing unit, configured to re-allocate a node identifier for the user equipment, and send the re-allocated node identifier to the user equipment for storage; so that the access network side is based on the re-allocated The node identifier finds the local standby control node, and performs the next connection between the user equipment and the local standby control node.

20. The node of claim 18, further comprising:

The establishment request receiving unit is configured to receive a connection establishment request sent by the storage node according to the corresponding index table, where the corresponding index table includes the correspondence between the first identification information of the user equipment and the second identification information of the node that backs up the user equipment service data. Relationship

And a connection establishing unit, configured to establish a connection with the user equipment by using the connection network side according to the connection establishment request received by the establishment request receiving unit.

The node according to claim 20, further comprising:

And an allocation unit, configured to re-allocate the node identifier of the user equipment, and send the re-assigned node identifier to the user equipment for storage by using the access network side.

The node according to any one of claims 19 to 21, further comprising: a deleting unit, configured to send a delete request message to the storage node, so that the storage node deletes the stored user equipment A corresponding index table of the second identification information of the node identifying the information and the user data of the backup user equipment.

The node according to claim 18, further comprising:

a backup unit, configured to select another standby control node for the user equipment, and back up service data of the current service of the user equipment to another selected standby control node;

And a storage unit, configured to store the identification information of the selected another standby control node and the identification information of the user equipment to another storage node.

The node according to claim 18, further comprising:

The corresponding storage unit is configured to store the correspondence between the identification information of the other user equipment and the identification information of the standby control node that backs up the service data of the active control node attached to the other user equipment.

A node fault processing system, comprising: an active control node and an alternate control node;

The primary control node is configured to back up the service data of the current service of the user equipment to the standby control node after the user equipment is attached, and the first identifier information of the user equipment and the service data of the backup user equipment Corresponding index table of the second identification information of the standby control node is stored to the storage node - The standby control node is the control node of any one of claims 19 to 24.

The system according to claim 25, further comprising the access network side device according to any one of claims 15 to 1.