WO2008003250A1

WO2008003250A1 - A fault positioning method, apparatus and system in the next generation network

Info

Publication number: WO2008003250A1
Application number: PCT/CN2007/070160
Authority: WO
Inventors: Dong Guo
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2006-06-30
Filing date: 2007-06-22
Publication date: 2008-01-10
Also published as: CN100514920C; CN101056214A

Abstract

A fault positioning method in the next generation network includes: recording an abnormal information in a call processing process and saving; determining a fault in the call processing process according to the abnormal information. A fault positioning apparatus in the next generation network includes: a call loss log register unit (211,222), for recording an abnormal information in a call processing process as a call loss log information and saving; a positioning unit (213,224), for positioning a service fault in the call processing process according to the call loss log information.

Description

Fault location method, device and system in next generation network This application claims to be submitted to the Chinese Patent Office on June 30, 2006, application number 200610036280.7, and the invention name is "Next Generation Network System and Next Generation Network Service Quality Fault Location Method" The priority of the Chinese Patent Application, the entire contents of which is incorporated herein by reference. Technical field

The present invention relates to the field of communications technologies, and in particular, to a method, apparatus, and system for locating faults in a next generation network. Background technique

The telecommunications network is being used by the traditional circuit-switched public switched telephone network (Public)

The Switched Telephone Network (PSTN) evolves to the Next Generation Network (NGN), which is based on packet switching. The NGN carries all the services of the original PSTN, and simultaneously offloads a large amount of data transmission to the ATM/IP network to alleviate the heavy load of the PSTN, and adds many services with the new features of the ATM/IP technology. Therefore, NGN is a product of TDM-based PSTN voice network and ATM/IP-based packet network convergence, which makes it possible to integrate voice, video, data and other services on a new generation network.

In the NGN architecture, the bearer is separated from the control. Soft Exchange (SX) controls the bearer resources on the media gateway to establish a traffic channel through a control protocol such as H.248.

The bearer resources on the media gateway include two types:

1) Termination (T), the endpoint is a logical entity on the media gateway capable of transmitting and receiving one or more media. According to the physical form, it can be divided into TDM endpoints (corresponding to a TDM time slot), ATM endpoints (corresponding to an ATM virtual channel), and IP endpoints (corresponding to a 'ΊΡ address + UDP port number, combination). Endpoint operations on the gateway are performed in a context (Context, C) environment. An endpoint belongs to and can belong to only one context at any time. A context can have several endpoints at any time.

2) Media resources, including encoder (Trans-Code, TC), echo canceler (Echo Cancel, EC) and so on. When establishing a traffic channel, the media gateway establishes a TDM endpoint and an IP or ATM endpoint under the control of the SX, and the TC resource is automatically added by the media gateway to the endpoint for completing the PCM code stream to the packet voice packet. The codec conversion between the two, if you need to suppress the echo, then add EC resources under the control of SX.

Referring to FIG. 1, the figure is a media gateway that allocates a bearer resource to create an endpoint T1 under the control of the SX.

T2 and the process diagram for deleting the endpoint T2:

Step 1: The SX sends a message to the media gateway, requesting the media gateway to create a context C1, and adding the endpoint T1;

Step 2: After receiving the message, the media gateway creates a context C1, adds an endpoint T1 to C1, and returns a response message to the SX.

Step 3: The SX sends a message to the media gateway to add the endpoint T2 in C1.

Step 4: After receiving the SX message, the media gateway adds T2 to C1 and returns a response message to SX.

Step 5: The SX sends a message for deleting the T2 from the C1 to the media gateway.

Step 6. After receiving the message, the media gateway deletes T2 from C1.

In the call processing process, once there is a service failure problem such as call setup failure and poor voice quality during the call process, the media gateway must provide some means to locate the cause of such service failure. The following are two solutions for locating traffic failures in the NGN in the prior art:

In the first solution, a one-time or periodic offline test task is manually created on the media gateway. Specifically, the process of offline detection of the gateway is as follows:

Step 10: Specify a bearer resource of the media gateway, and establish a call connection with the bearer resource. Step 11: insert, loop, and compare the simulated data.

Step 12: According to the comparison result, it is judged whether the bearer resource cooperation of the voice channel is reasonable.

In this solution, the bearer resources of the offline test cannot be reasonably specified because the bearer resources of the media gateway are not properly specified. However, in actual use, all bearer resources in the media gateway can be specified for offline testing. This offline test takes a long time and affects the normal operation of the media gateway;

It is impossible to find the fault that occurred during the call setup phase. In the call setup phase where some service faults occur, the gateway offline test cannot find the fault at this stage. The fault introduced by the external bearer network cannot be discovered because only the bearer resources of the media gateway are tested.

In addition, the prior art also provides a method for locating service faults by using call tracking. Specifically, the process of one call tracking is as follows:

Step sl: The user sends a command to track the call to the media gateway.

Step s2: After the media gateway obtains the command, wait for the call to be tracked to go online. Step s3. After the call to be tracked goes online, the media gateway outputs all relevant information in the call processing process.

In this solution, since call tracking is initiated after a service failure occurs, the cause of the service failure may have disappeared, and the result of the call tracking does not reflect any failures and problems. Summary of the invention

The embodiment of the invention provides a method, a device and a system for locating a fault in a next-generation network, and proposes a service fault in the process of quickly and accurately positioning the call processing without affecting the normal service of the media gateway.

An embodiment of the present invention provides a method for fault location in a next generation network, including: the media gateway records and saves abnormal information in the call processing process as call loss log information;

The media gateway locates the service fault in the call processing process according to the call loss log information. The embodiment of the invention provides a next generation network system, including:

Softswitch, used to control the establishment, monitoring and removal of call connections;

a media gateway, configured to allocate a bearer resource according to a control of a softswitch to establish a traffic channel; and a packet network, configured to uniformly carry information according to the packet;

The media gateway includes: a call loss log recording unit, configured to record abnormal information in the call processing process as the call loss log information;

And a positioning unit, configured to locate a service fault in the call processing process according to the call loss log information.

The embodiment of the invention further provides a fault locating device, comprising:

a call loss log recording unit, configured to record abnormal information during call processing as call loss log information and save; And a positioning unit, configured to locate a service fault in the call processing process according to the call loss log information.

In the technical solution provided by the embodiment of the present invention, the abnormality information of the call processing process in the NGN is recorded as the call loss log information, and when a service fault occurs, the cause of the service fault is located according to the recorded call loss log information. Since the call loss processing information is recorded during the call processing, the service fault in the positioning call processing can be quickly and accurately tracked without affecting the normal service. DRAWINGS

1 is a schematic diagram of a process for a media gateway to allocate bearer resources C, T under SX control; FIG. 2 is a specific flowchart of a service fault location method in an NGN according to a first embodiment of the present invention; FIG. 3 is a second embodiment of the present invention. A specific flowchart of a method for locating a service fault in an NGN; FIG. 4 is a structural diagram of a structure of an NGN system according to a first embodiment of the present invention;

FIG. 5 is a structural diagram of a media gateway in a second embodiment of the present invention. detailed description

The principle of the invention will first be described below:

Because in the NGN, the control is separated from the bearer, the media gateway cannot know the correspondence between the bearer resource and the user service identifier (such as the user's phone number) on the SX. When the user complains about the service failure, the call loss log information of the related bearer resource cannot be extracted. Therefore, the correspondence between the user service identifier on the SX and the bearer resource on the media gateway must be set, so that the user can quickly respond to the service failure. Obtain corresponding call loss log information according to the user service identifier.

During the call processing, the media gateway caches the information of each call processing flow, including the information of the SX through the H.248 message for resource operation and the information record of the corresponding message on the gateway. Referring to FIG. 1 , in the call processing process shown in FIG. 1 , the content of the first message sent by the media gateway corresponding to the SX, Add.req($, Tl), needs to be cached: 1) The media gateway receives the SX. Add.req ($, Tl) message specific content;

2) The context identifier C1 assigned by the media gateway, the time when C1 is allocated, the end point identifier T1 added to C1, and the time when the force port enters T1;

3) The specific content of the Add.resp (C1, T1) message sent by the media gateway to SX.

As the call processing process continues, the relevant information is continuously cached until all endpoints in C1 are Delete, and then the CI is also recycled by the media gateway, so that the information in a complete call processing will be completely cached.

Since a large number of calls are simultaneously made on the media gateway, if the cached call processing information is recorded as a call log indiscriminately, the demand for the storage space is extremely large, and the time for querying a specific call log from the information is long, engineering. can not achieve. Therefore, it is necessary to eliminate normal call processing information, and only call processing information when the call is handled abnormally is convenient for storage and query implementation. How to define abnormal call handling, and what should be included in the log information when abnormal call processing. Rely on the definition of the network traffic model. In general, call handling exceptions can include the following:

1. The media gateway responds to the H.248 message sent by the SX or the common in-band negotiation signaling response. In this case, you need to record the reason for the rejection in detail, including: receiving an unrecognized message, the media gateway does not support the function requested by the message, the media gateway resource is abnormal, and the specified operation cannot be completed;

2. The call processing time is too long or short;

3. The quality of the IP bearer network is poor. The quality of each voice channel on the IP bearer network can be obtained through the Real-time Transport Control Protocol (RTCP).

When a user complains about a service fault, you can extract the relevant call log information by analyzing the user service identifier and the time when the service fault occurs, to locate the service fault, such as the signaling plane coordination problem, or the carrier network quality is too poor. You can also perform gateway offline testing by specifying various bearer resources used by users to locate service faults.

Referring to FIG. 2, which is a specific flowchart of a first embodiment of a method for locating a service fault in a next-generation network according to the present invention, the specific implementation process of the method is as follows:

Step 100: The SX records a correspondence between the user service identifier and the bearer resource on the media gateway, where the bearer resource includes an endpoint and a context.

Step 101: The media gateway caches information about each call processing flow.

Step 102: After the call processing ends, the media gateway determines whether the call processing is abnormal, and records the information cached during the call as the call loss log information when the judgment result is yes.

Step 103: When the user complains, the SX carries the resource according to the user service identifier and the media gateway. The corresponding relationship between the source and the time when the service fault occurs acquires the corresponding Termination and Context information, and the media gateway obtains the corresponding call loss log information according to the Termination and Context information.

Step 104: Analyze and locate the cause of the service fault according to the call loss log information obtained on the media gateway.

Referring to FIG. 3, this figure is a specific flow chart of a second embodiment of a method for locating a service failure in an NGN according to the present invention. The specific implementation process of the method is as follows:

Step 200: The SX sends a user service identifier to the media gateway. When the media gateway creates the endpoint and the context, the SV sets the correspondence between the user service identifier and the endpoint and the context.

Step 201: The media gateway caches information of each call processing flow.

Step 202: After the call processing ends, the media gateway determines whether the call processing is abnormal, and if the result is yes, the information cached during the call is recorded as the call loss log information.

Step 203: When the user complains, the media gateway acquires the corresponding Termination and Context information according to the correspondence between the user service identifier and the bearer resource on the media gateway and the time when the service fault occurs, and obtains corresponding information according to the Termination and Context information. Call loss log information.

Step 204: Analyze and locate the cause of the service fault according to the call loss log information obtained on the media gateway.

Referring to Figure 4, there is shown a block diagram of the first embodiment of the NGN system of the present invention.

As shown in the figure, in the embodiment, the NGN system includes SX 1 , and the SX 1 stores user service identification information, and the main functions thereof are used to control establishment, monitoring, and teardown of the call connection, and set the user service identifier and the media gateway. The corresponding bearer resource is searched according to the user service identifier, and the bearer resource is sent to the media gateway.

Referring to FIG. 4, in this embodiment, the SX 1 mainly includes: a first setting unit 11 and a search processing unit 12, wherein

The first setting unit 11 is configured to set a correspondence between the user service identifier and the bearer resource in the media gateway.

The search processing unit 12 is configured to search for corresponding bearer resource information according to the service identifier, and send the bearer resource information to the media gateway. In addition, the NGN system of the present invention further includes a media gateway 2, and the media gateway 2 is connected to the SX 1 and the packet network 3, respectively. The main function is to allocate a bearer resource according to the control of the SX 1 to establish a traffic channel, and the call is made. The abnormality information in the process is recorded as the call loss log information, and the service fault in the call processing process is located according to the call loss log information.

Referring to FIG. 4, the media gateway 2 in this embodiment mainly includes: a call loss log recording unit.

211. The call loss log obtaining unit 212 and the positioning unit 213, where

The call loss log recording unit 211 is configured to record the abnormality information in the call processing process as the call loss log information. The call loss log recording unit may specifically include: the call loss information buffer unit 2111, The information of each call processing is cached. The call loss log processing unit 2112 is configured to extract cache information in the call information buffer unit when an abnormality occurs in the call processing process, and record the cache information as call loss information.

The call loss log obtaining unit 212 is configured to receive the bearer resource information sent by the search processing unit, and further obtain call loss log information including the bearer resource information.

The locating unit 213 is configured to locate a service fault in the call processing process according to the call loss log information.

In addition, the NGN system provided in this embodiment further includes a packet network 3, which is the same as the prior art, and the packet network 3 is used to uniformly carry information according to the packet.

Next, a second embodiment of the NGN system of the present invention will be described.

The NGN system provided in this embodiment mainly includes an SX 1, a media gateway 2, and a packet network 3, as in the first embodiment of the NGN system of the present invention. The SX 1 is the same as the prior art, and stores user service identification information, which can be used to control establishment, monitoring, and teardown of a call connection.

In addition, the embodiment also includes a media gateway 2, and the media gateway 2 is connected to the SX 1 and the packet network 3, and the main function is to allocate a bearer resource according to the control of the SX 1 to establish a traffic channel, and set a user service. The identifier is associated with the bearer resource in the media gateway, and the abnormal information in the call processing process is recorded as the call loss log information, and the service fault in the call processing process is located according to the call loss log information.

The media gateway in this embodiment will be specifically described below. Referring to FIG. 5, the media gateway 2 in this embodiment mainly includes: a second setting unit 221, a call loss log recording unit 222, a call loss log obtaining unit 223, and a positioning unit 224, wherein

The second setting unit 221 is configured to receive a user service identifier sent by the SX, and set a correspondence between the user service identifier and the bearer resource in the media gateway.

The call loss log recording unit 222 is mainly configured to record the abnormality information in the call processing process as the call loss log information. The call loss log recording unit may specifically include: the call loss information buffer unit 2221, The information of each call processing process is cached. The call loss log processing unit 2222 is configured to extract cache information in the call loss information buffer unit when an abnormality occurs in the call processing process, and record the cache information as call information.

The call loss log obtaining unit 223 is configured to obtain corresponding bearer resource information according to the correspondence between the user service identifier and the bearer resource, and further obtain call loss log information including the bearer resource information.

The locating unit 224 is configured to locate a service fault in the call processing process according to the call loss log information obtained by the call loss log obtaining unit.

It can be understood by those skilled in the art that all or part of the functional modules and the steps in the foregoing embodiments may be implemented by a program to instruct related hardware, and the program may be stored in a computer readable storage medium, such as the storage medium. ROM/RAM, disk, CD, etc. Alternatively, they may be fabricated into individual integrated circuit modules, or a plurality of modules or steps may be fabricated into a single integrated circuit module. Thus, the invention is not limited to any particular combination of hardware and software.

It can be seen from the foregoing description that, in the technical solution provided by the embodiment of the present invention, the abnormal information of the call processing process in the NGN is recorded as the call loss log information, and when a service fault occurs, the service fault is generated according to the recorded call loss log information. s reason. Since the call loss processing information is recorded during the call processing, the service fault in the positioning call processing can be quickly and accurately tracked without affecting the normal service.

The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of the present invention. Any modifications, equivalents, and improvements made within the spirit and scope of the invention are intended to be included within the scope of the appended claims.

Claims

Rights request

A method for fault location in a next generation network, comprising: the media gateway recording and storing the abnormal information in the call processing process as the call loss log information;

The media gateway locates the service fault in the call processing process according to the call loss log information.

The method according to claim 1, wherein the recording and storing the abnormal information in the call processing process comprises:

The media gateway caches information during call processing;

After the call ends, the media gateway determines whether the call processing process is abnormal, and saves the cache information as the call loss log information after determining that the call processing process is abnormal.

3. The method of claim 2, wherein

Pre-recording the correspondence between the user service identifier and the bearer resource on the media gateway;

Determining a fault in the call processing process according to the abnormality information, specifically:

Obtaining corresponding bearer resource information according to the correspondence between the user service identifier and the bearer resource in the media gateway;

And extracting call loss log information including the bearer resource information according to the bearer resource information; and locating a service fault in the call processing process according to the call loss log information.

4. The method according to claim 2, wherein before the information in the call processing is cached, the method further comprises:

Sending a user service identifier to the media gateway;

The media gateway sets a correspondence between the user service identifier and the bearer resource in the media gateway; determining the fault in the call processing process according to the abnormal information, specifically:

The media gateway searches for the call loss log information including the bearer resource according to the correspondence between the user service identifier and the bearer resource in the media gateway, and extracts the call loss log information;

Locating a service fault in the call processing process according to the call loss log information.

The method according to any one of claims 2 to 4, wherein the information in the call processing flow comprises:

The interaction message between the softswitch and the media gateway through the control protocol for resource operation, and the media gateway to allocate the bearer resource according to the control of the softswitch to establish a specific operation content of the traffic channel.

The method according to any one of claims 2 to 4, wherein the abnormality of the call processing process includes at least one of the following: the media gateway returns a reject message to the softswitch signaling, the calling time is too short or The ultra-long, IP bearer network is of poor quality.

7. A next generation network system, including:

The media gateway includes: a call loss log recording unit, configured to record abnormal information in the call processing process as call loss log information;

8. The system according to claim 7, wherein the call loss log recording unit comprises:

a call loss information buffering unit, configured to cache information of each call processing process;

The call loss log processing unit is configured to extract cache information in the call loss information buffer unit when the call processing is abnormal, and record the cache information as the call loss log information.

The system according to claim 7, wherein the softswitch further comprises: a first setting unit, configured to set a correspondence between a user service identifier and a resource bearer resource in the media gateway;

The search processing unit is configured to search for corresponding bearer resource information according to the user service identifier, and send the bearer resource information to the media gateway.

The system according to claim 7, wherein the media gateway further comprises: a second setting unit, configured to set a correspondence between the user service identifier and the bearer resource in the media gateway.

The system according to claim 9 or 10, wherein the media gateway further comprises:

The call loss log obtaining unit is configured to obtain call loss log information including the bearer resource information according to the bearer resource information.

12. A fault locating device, comprising: a call loss log recording unit, configured to record abnormal information during call processing as call loss log information and save;

The device according to claim 12, wherein the call loss log recording unit specifically includes:

14. The device according to claim 12, further comprising:

a first setting unit, configured to set a correspondence between a user service identifier and a resource bearer resource in the media gateway;

The device according to claim 12, further comprising:

The second setting unit is configured to set a correspondence between the user service identifier and the bearer resource in the media gateway.

The device according to claim 14 or 15, further comprising: a call loss log obtaining unit, configured to acquire call loss log information including the bearer resource information according to the bearer resource information.