WO2006097048A1

WO2006097048A1 - Method for detecting the path configuration state of the opposite node and the method for establishing the connection

Info

Publication number: WO2006097048A1
Application number: PCT/CN2006/000408
Authority: WO
Inventors: Yonghong Wang
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2005-03-18
Filing date: 2006-03-16
Publication date: 2006-09-21
Also published as: CN1835463A; CN100414909C

Abstract

A method for detecting the path configuration state of the opposite node includes: set the state flag for identifying the configuration state of this path at opposite node with respect to the path configuration at current node; update the state flag according to the configuration state of this path at opposite node; determine the configuration state of this path at opposite node according to said state flag. Further, a method for establishing AAL2 connection adopts: pre-set the state flag for the path of configuration at the node; when establishing AAL2 connection between current node and opposite node, inquiry the state flag of the corresponding path of itself configuration, when this state flag is the flag having been configured, establish connection using this path; otherwise, establish connection without using this path. Since it may know whether the corresponding path is configured at opposite node before establishing connection, therefore it may avoid unsuccessful establishing connection effectively due to the non-coincidence of resource configuration of both end node, improve greatly the success ratio of establishing connection.

Description

Method for detecting path configuration state of peer node and method for establishing connection

The present invention relates to the field of network communication technologies, and in particular, to a method for detecting a path configuration state of a peer node, and establishing a connection between nodes based on an Asynchronous Transfer Mode (ATM) Adaptation Layer Type 2 (AAL2) signaling protocol. Methods. Background of the invention

The AAL2 signaling protocol provides the ability to establish, release, and maintain AAL2 connections between two nodes for the purpose of carrying user data over AAL2 connections in the third generation of Wideband Code Division Multiple Access (3G WCDMA) systems. It has been widely used. The establishment of the connection based on the protocol, that is, the flow of the AAL2 connection is as shown in FIG. 1, which mainly includes: First, the local node (node 1) initiates sending an AAL2 setup request (ERQ) to the correspondent node (node 2); when the node 2 receives After the ERQ, it is checked whether the path resource requested in the ERQ is correct and available. If yes, an establishment confirmation message (ECF) is returned to the node 1, so that the AAL2 connection is successfully established between the node 1 and the node 2. The node 2 determines whether the requested path resource is correct and available, that is, determines whether the path applied by the node 1 when establishing the connection is configured by itself, and if so, determines that the path resource is correct and available; otherwise, the path is determined to be unavailable. use.

However, in an actual communication network, the data of the nodes at both ends of the connection are often inconsistent due to various reasons, that is, the path resources configured in the local node and the opposite node are inconsistent. At this point, the process that will lead to the establishment of the AAL2 connection is as shown in Figure 2: First, the node 1 still sends the ERQ to the node 2; when the node 2 receives the ERQ, it determines whether the requested path resource in the ERQ exists in itself. If yes, the above process is performed; and when node 2 finds that the corresponding path resource does not exist, the message is directly discarded. In this way, node 1 failed due to Receiving the ECF returned by node 2 within the set time causes the establishment of the AAL2 connection to fail. Moreover, if the data configuration of the nodes at both ends of the connection is inconsistent, the call failure rate is relatively high, which ultimately results in poor communication network service quality and affects user satisfaction. SUMMARY OF THE INVENTION

An object of the present invention is to provide a method for detecting a path configuration state of a peer node, so as to achieve the purpose of acquiring a path configuration state of the peer node.

The method of the invention mainly comprises the following steps:

A. A state flag indicating a configuration state of the path at the peer node is set for the path configured on the local node, and when the status flag is a configured flag, indicating that the peer node has configured the path, When the status flag is an unconfigured flag, it indicates that the path is not configured on the peer node.

B. The path configured on the local node updates the status flag of the corresponding path in the configuration state of the opposite node;

C. Determine, according to the status flag, a configuration state of a path configured on the local node at the opposite node.

In the above method, the step B includes: performing the path according to a reset path message based on an Asynchronous Transfer Mode (ATM) Adaptation Layer Type 2 (AAL2) signaling protocol or a path query message added in the AAL2 signaling protocol. The status flag is updated.

In the above method, when the status flag is updated according to the reset path message based on the AAL2 signaling protocol, the step B includes:

Bl l, the local node sends a reset path message to the opposite node;

B12. After receiving the message, the peer node determines whether the path exists locally. If yes, returns a reset confirmation response to the local node, and sets a local status flag of the path as a configured flag; otherwise, discards The message; B13. The local node determines whether a reset confirmation response returned by the opposite node is received. If yes, the status flag of the path is set to the configured flag; otherwise, the status flag of the path is set to an unconfigured flag.

In the above method, when the status flag is updated according to the path query message added in the AAL2 signaling protocol, the step B includes:

B21. The local node sends a path query message to the peer node, and carries information about the required query path in the message.

B22. After receiving the message, the peer node queries whether the path exists locally according to the path information carried in the path, and sends a query result to the local node, and if the path exists locally, the status flag of the local path is set. Is configured as a flag;

B23. After receiving the query result returned by the peer node, the local node updates the status flag of the path according to the query result.

In the above method, the step B further comprises: setting a status flag of the newly configured path on the node to an unconfigured flag.

In the above method, the step B further includes: when the local node sends a connection establishment or reset path message timeout, the status flag of the corresponding path is set to an unconfigured flag.

In the above method, the step B includes: when the path configured on the local node does not exist in the peer node, the step B is triggered according to time or event.

In the above method, the step B further includes: when the local node receives the reset path message, the path query message, the occlusion message, the unblocking message, or the message establishing the connection on the path sent by the opposite end node, The status flag of the path is set to the configured flag.

In the above method, the method further includes: when the local node determines that the peer node uses a path that is not configured by the local node, and actively sends a path state notification to the peer node; the peer node sends the path according to the notification. The status flag is set to the unconfigured flag.

Another object of the present invention is to provide a method for establishing an AAL2 connection, which is mainly The method includes the following steps: setting a status flag for the path configured on the node in advance, and updating the status flag according to the method according to any one of the preceding claims 1 to 9; when the local node is to be associated with the opposite node When the AAL2 connection is established, the local node queries the status flag of the path used by the local connection to establish the connection, and determines whether the status flag is a configured flag. If yes, the path is used to establish a connection; otherwise, the node is not used. The path establishes a connection.

It can be seen from the technical solution provided by the present invention that the method for detecting the path configuration state of the peer node according to the present invention can clearly obtain whether the peer node establishing the connection is configured to establish the connection node before establishing the connection between the nodes. The path required. Therefore, when the method for detecting the path configuration state of the peer node is used to establish a connection between the two nodes, the initiator of the connection establishment can detect the path configuration of the peer end, thereby effectively avoiding the inter-node relationship due to resource inconsistency at both ends of the node. The problem of establishing a connection failure has occurred, and the success rate of establishing a connection is improved. Obviously, the implementation of the present invention enables an effective improvement in the quality of service provided by the communication network based on the AAL2 protocol. BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 shows the signaling diagram when the AAL2 connection is established successfully.

FIG. 2 is a signaling diagram when the AAL2 connection fails in the prior art.

3 is a flow chart of a method for updating a path status flag in accordance with the present invention. Mode for carrying out the invention

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings.

In the following description, the two end nodes that establish the connection are respectively defined as the local end node and the opposite end node, wherein any end node can be used as the local end node, and at this time, the other end node acts as the opposite end node. The core idea of the method for detecting the path configuration state of the peer node according to the present invention is: setting a status flag identifying the configuration state of the path at the opposite node for the path configured on the local node, and when the status flag is configured When the flag indicates that the peer node has configured the path, when the status flag is an unconfigured flag, it indicates that the path is not configured on the peer node; according to the configured state of the peer node on the local node The status flag of the path is updated; and the configuration status of the configured path on the local node is determined according to the status flag.

The method for detecting the path configuration state of the peer node according to the present invention is described in detail below. The method mainly includes the following steps:

First, a status flag is set for the path configured on the local node, and the status flag is used to indicate whether the corresponding path is configured on the opposite node. When the status flag is the configured flag, it indicates that the peer node has been configured with the Path, when the status flag is unconfigured, it indicates that the path is not configured on the peer node.

The above status flags can use valid flag bits, such as "1" and invalid flag bits, such as "0" respectively, where the valid flag bit" is used as the configured flag, indicating that the corresponding path has been configured on the peer node to invalidate the flag. The bit "0" is used as the unconfigured flag, indicating that the corresponding path is not configured on the opposite node. Of course, other corresponding flag bits may also be used as the configured flag and the unconfigured flag of the status flag.

Secondly, the local node performs information interaction with the opposite node, and updates and processes the status flag set according to the exchanged information.

The process of updating the path state flag by using the information exchange between the local node and the peer node may be implemented by using a reset path message in the existing AAL2 signaling protocol, that is, by the local node to the opposite node. A reset path message is sent for the corresponding path, and then it is determined whether the path is configured on the opposite node by detecting whether a reset confirmation response returned by the opposite node is received. The above implementation manner is described in detail below, and the flow thereof is as follows. As shown in FIG. 3, the following steps are specifically included:

Step 301: When the status flag of the configured path on the local node is an unconfigured flag, send a reset path message for the corresponding path to the opposite node.

The above reset path message is based on the AAL2 signaling protocol. Moreover, the above status flag is an unconfigured flag, which specifically includes the following cases:

The status flag of the newly configured path on the node is set to the unconfigured flag, that is, the path is not considered to be configured on the peer node by default; note that the node here includes the local node and the opposite node, that is, any node The status flags for the new configuration path are set to unconfigured flags.

When the local node sends an ERQ timeout, the status flag of the path used by the connection is configured as an unconfigured flag.

When the local node sends a reset path message timeout, the status flag of the corresponding path is configured as an unconfigured flag.

Step 302: After receiving the message, the peer node determines whether the path exists locally. If yes, returns a reset confirmation response to the local node, and sets the status flag of the local path to the configured flag; otherwise, Discard the message.

Step 303: The local node determines whether the reset confirmation response returned by the opposite node is received. If yes, step 304 is performed; otherwise, step 305 is performed.

The local node can determine whether a reset confirmation response is received within the set time, otherwise, it is not received.

Step 304: Set the status flag of the corresponding path on the local node to the configured flag, that is, the path is configured on the opposite node, and the process ends.

Step 305: The status flag of the corresponding path on the local node is set to an unconfigured flag, that is, the path is not configured on the opposite node, and the process ends.

In this step, since the status flag of the corresponding path on the local node itself is an unconfigured flag, the unconfigured flag described in this step can take the status of the corresponding path. The logo is implemented without any treatment.

In addition, when the local node receives the reset path message, the occlusion message, the unblocking message, or the message establishing the connection on the path from the opposite end node, it indicates that the path is configured at the opposite end, and therefore Set the status flag for the corresponding path on the local node to the configured flag.

When it is determined that the corresponding path is not configured on the peer node, and the status flag for the path on the local node is still an unconfigured flag, the local node may trigger the foregoing detection process according to time, such as: by a certain period or event, until The peer node configures the path.

At the same time, since the corresponding path is configured on the opposite end node, in normal application, the path may be deleted or unavailable at the opposite end node due to various reasons. At this time, if the local end sends an ERQ timeout or the reset path message times out, the status flag of the path can be configured as an unconfigured flag.

The method for updating the path status flag according to the reset path message in the existing AAL2 signaling protocol is described above, and the process of updating the path status flag by the information interaction between the local end node and the opposite end node may also be based on The method for adding a path query message in the existing AAL2 signaling protocol is implemented, and the method includes the following steps:

Step 401: The local node sends a path query message to the peer node, and carries information of the required query path in the message.

Step 402: After receiving the path query message, the peer node queries whether the path exists locally according to the path information carried in the path, and sends the query result to the local node, and if the path exists locally, the path is local. The status flag is set to the configured flag.

Step 403: After receiving the query result returned by the peer node, the local node updates the status flag of the path according to the query result. That is, when the result of the query is that the path does not exist on the peer node, the status flag of the path on the local node is set to an unconfigured flag, and when the query results in the path of the peer node, the local Corresponding on the end node The status flag of the path is set to the configured flag.

In addition, in order to further improve the path state flag update process of the present invention, the method may further include: if it is detected that a path is used by the peer node, and the local end is not configured, the local node may send a path state notification to the peer node actively. The path of the path is not notified. When the peer node receives the path status notification, the status flag of the path is set to an unconfigured flag.

The method for detecting the state of the peer path according to the present invention is described above. Next, the method for establishing the AAL2 connection based on the above method according to the present invention will be described. The core idea of the method is: presetting the status flag for the path configured on the node; When the end node establishes an AAL2 connection with the peer node, the local node determines whether the status flag of the path used to establish the connection is a configured flag. If yes, the path is used to establish a connection. Otherwise, the path is not used to establish a connection. In this way, the inconsistency of the path information configured by the nodes at both ends can be effectively improved, and the connection establishment process fails, thereby improving the service shield and thereby improving user satisfaction.

The above is only a preferred 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 within the technical scope disclosed by the present invention. Alternatives are intended to 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

Claim

A method for detecting a path configuration state of a peer node, the method comprising:

B, 4, according to the configuration path on the local node, the status flag of the corresponding path is updated in the configuration state of the opposite node;

C. According to the status flag, the configuration state of the path configured on the local node at the opposite node is determined.

2. The method for detecting a path configuration state of a peer node according to claim 1, wherein the step B comprises: according to a reset path message based on an asynchronous transmission mode ATM adaptation layer type 2 AAL2 signaling protocol or The path query message added in the AAL2 signaling protocol updates the status flag of the path.

The method according to claim 2, wherein when the status flag is updated according to the reset path message based on the AAL2 signaling protocol, the step B includes:

B 1 The local node sends a reset path message to the opposite node;

B12. After receiving the message, the peer node determines whether the path exists locally. If yes, returns a reset confirmation response to the local node, and sets a local status flag of the path as a configured flag; otherwise, discards The message;

B13. The local node determines whether a reset confirmation response returned by the opposite node is received. If yes, the status flag of the path is set to the configured flag; otherwise, the status flag of the path is set to an unconfigured flag.

4. The method according to claim 2, wherein when the status flag is updated according to the path query message added in the AAL2 signaling protocol, the step B includes:

The method according to any one of claims 1 to 4, wherein the step B further comprises: setting a status flag of the newly configured path on the node as an unconfigured flag.

The method according to any one of claims 1 to 4, wherein the step B further comprises: when the local node sends a connection establishment or reset path message timeout, the status flag of the corresponding path is set The flag is not configured.

The method according to any one of claims 1 to 4, wherein the step B comprises: when the path configured on the local node does not exist at the opposite node, triggering execution according to time or event Steps ^

The method according to claim 2, 3 or 4, wherein the step B further comprises: when the local node receives the reset path message, the path query message, the occlusion message, and the detachment sent by the opposite node. When a message or a message that establishes a connection on the path, the status flag of the path is set to the configured flag.

The method according to any one of claims 1 to 4, wherein the method further comprises: when the local node determines that the peer node uses a path that is not configured by the local node, actively forwards to the opposite end The node sends a path status notification; the peer node will follow the notification according to the notification The status flag of the path is set to the unconfigured flag.

A method of establishing an AAL2 connection, the method comprising: setting a status flag for a path configured on a node in advance, and pairing the status according to the method of any one of claims 1 to 9. The flag is updated. When the local node establishes an AAL2 connection with the peer node, the local node queries the status flag of the path used by the local node to establish the connection, and determines whether the status flag is a configured flag. , use this path to establish a connection; otherwise, the path is not used to establish a connection.