WO2012010030A1 - Method and a system for inquiring access node information - Google Patents

Abstract

Provided in the present invention are a method and a system for inquiring Access Node (AN) information, wherein the method includes that a service control network element transmits a diagnosis inquiry message to an AN, wherein the diagnosis inquiry message includes a Simple Network Management Protocol (SNMP) reading request Protocol Data Unit (PDU) corresponding to the content to be inquired; and the AN returns an inquiry response message to the service control network element after receiving the diagnosis inquiry message, wherein the inquiry response message includes an SNMP reading response PDU corresponding to the content to be inquired. With the present invention, not only is a direct inquiry realized between the service control network element and the AN, but also the information inquiry is made simple and convenient, and therefore the work load and the time cost consumed in modifying a protocol stack in the prior art are avoided.

Description

 Access node information query method and system

 The present invention relates to the field of network communications, and in particular, to an access node information query method and system. Background technique

 In recent years, with the rapid development of the telecommunications industry, the penetration rate of the Internet is also rapidly increasing, and the network capacity and the performance upgrade speed of network equipment are far behind the development speed of Internet users and Internet services, and network failures frequently occur. The service quality is unstable, which poses a great challenge to the network maintenance capability. It is difficult to continuously improve the overall service quality of the network. How to improve the maintenance efficiency of existing networks and improve the quality of customer service has become an increasingly important research topic.

 The service control node (SN) and the service router (SR) are the service control network elements of the broadband network, and play an important role in user management and user service control in the network. An access node (AN, Access Node) is an access side network element of a broadband network. It plays the role of "last mile" user link access and management in the network, and is an important network element between the end user and the SN. The configuration errors of the AN, traffic congestion, and device failures all affect the user session or user service quality. The SN may be a remote broadband access server (BRAS, Broadband Remote Access Server); the AN may be a digital subscriber line access multiplexer (DSLAM), an optical line terminal (OLT) / an optical network unit ( ONU), or user-side switch.

In the current broadband access network, both SN and AN are used as queried parties, and they are usually configured and maintained by different network management systems (NMS), and in many cases belong to different maintenance teams. Such as an SN maintenance team and an AN maintenance team within an operator; or, in the Wholesale scenario, SN and AN are respectively It is maintained by different operators and by their respective maintenance teams. In these cases, after a user's session failure or degradation of service quality occurs, it may be necessary to conduct collaborative diagnosis across the network management system, across maintenance teams, and even across operators. The maintenance efficiency of the network is also reduced. That is to say, in the three cases of cross-network management system, cross-maintenance team, and cross-operator collaborative diagnosis, the cross-network management system network has the highest maintenance efficiency, and the maintenance maintenance network network has the second highest maintenance efficiency. Network maintenance is the least efficient. Especially when it comes to cross-maintenance teams or cross-operators, there are often communication problems such as unclear problems and repeated confirmations. It is difficult to achieve efficient and fast positioning.

 The root of the above problems lies in: SN and AN use two different management systems to work independently, which cannot achieve fast and consistent collection of various diagnostic information. In broadband networks, SN is the control of user sessions and services, SN The management system and management personnel need to know the diagnostic information on the AN in a timely and accurate manner to quickly confirm the cause of the network failure or the deterioration of the service quality. That is, the SN is required as the querier and the AN is the queried. The information exchanges between the two, and the SN quickly confirms the cause of the network failure or the deterioration of the service quality based on the diagnostic information queried from the AN.

 Current network equipment, including SN and AN, is mainly through the Simple Network Management Protocol (SNMP), NMS or Element Management System (EMS) and network equipment. In addition to the information on the network device, the NMS or the EMS can send configuration commands to the network device, and receive alarms uploaded by the network device.

As described above, the information exchange between the SN and the AN is implemented. If SNMP is deployed between the SN and the AN to perform diagnostic information query on the AN, the SN needs to support the entire set of SNMP, that is, in addition to supporting the SNMP client ( SNMP Client) also needs to support the complex functions of the SNMP server (SNMP Server), while the current SN usually only supports SNMP clients. The function of the client (SNMP Client). If you want to support SNMP when using information exchange, you need to modify the protocol stack. The changes to the SN are large, but the relative changes are small for the AN, because the AN still only needs to support the SNMP Client.

 In summary, SN and AN are differently configured by different management systems. Therefore, direct query between the two can result in low query performance and affect network maintenance efficiency. If direct query is implemented between the two, the existing technology needs to introduce SNMP, and the information exchange between the SN and the AN is performed. However, the SN is required to support the entire set of SNMP, and the modification of the protocol stack is large and expensive. Workload and time costs are high. Summary of the invention

 In view of this, the main purpose of the present invention is to provide an access node information query method and system, which not only implements direct query between the service control network element and the AN, but also makes the information query simple and easy, thereby avoiding the need to modify the prior art. The workload and time cost of the protocol stack.

 In order to achieve the above object, the technical solution of the present invention is achieved as follows:

 An access node information query method includes:

 The service control network element sends a diagnostic query message to the access node (AN), where the diagnostic query message includes a Simple Network Management Protocol (SNMP) read request protocol data unit corresponding to the required query content;

 After receiving the diagnostic query message, the AN returns a query response message to the service control network element. The query response message includes an SNMP read response protocol data unit corresponding to the required query content.

 The triggering mode for triggering the sending of the diagnostic query message is: the network management system sends a triggering manner to the service control network element to trigger the service control network element diagnosis, and the trigger mode of the service control network element automatic diagnosis, Or trigger the service control network element to trigger the trigger mode through the command line.

The network management system sends an instruction to the service control network element to trigger a service control network element. In the method of the triggering of the diagnosis, the method further includes: after the network management system of the service control network element performs the on-demand diagnosis, sending the diagnosis query to the AN to the service control network element, the service control network element sends The diagnostic query message is sent to the AN.

 The method further includes: when the service control network element automatically detects the triggering mode, the method further includes: after the service control network element automatically diagnoses the initiative, the service control network element sends the diagnostic query message Give the AN.

 The query result obtained after the service control network element sends the diagnostic query message to the AN is encapsulated in the SNMP read response protocol data unit;

 After the service control network element obtains the query result, the method further includes: the service control network element sending the query result to the network management system for saving, or saving the query result directly in the service control The maintenance personnel on the NE can query through the command line.

 The service control network element is a service control node or a service router.

 An access node information query system, comprising: a service control network element and an AN; wherein the service control network element is configured to send a diagnostic query message to the AN; wherein the diagnostic query message includes the required query content Corresponding SNMP read request protocol data unit; the AN, configured to: after receiving the diagnostic query message, return a query response message to the service control network element; wherein the query response message includes the required query The content corresponds to the SNMP Read Response Protocol data unit.

 The triggering mode used to trigger the sending of the diagnostic query message is: the network management system sends a triggering manner to the service control network element to trigger the service control network element diagnosis, and the trigger mode of the service control network element automatic diagnosis. Or trigger the service control network element to trigger the trigger mode through the command line.

The service control network element is further used in the case that the trigger mode used is that the network management system sends a command to the service control network element to trigger a service control network element diagnosis trigger mode, where the service control is performed. When the network management system of the network element diagnoses on demand, it goes to the service control network element. After sending the diagnostic query to the AN, the service control network element sends the diagnostic query message to the AN.

 The service control network element is further used to initiate automatic diagnosis of the AN when the service control network element diagnoses itself by using the trigger mode of the service control network element to automatically diagnose the trigger mode. Afterwards, the service control network element sends the diagnostic query message to the AN.

 After the service control network element sends the diagnosis query message to the AN, the service control network element is obtained, and when the query result is obtained, the query result is sent to the network management. The system saves or saves the query result directly on the service control network element for the maintenance personnel to query through the command line.

 The service control network element (SN or SR) of the present invention sends a diagnostic query message to the AN; the diagnostic query message includes an SNMP read request protocol data unit corresponding to the required query content; and the AN receives the diagnostic query message to the service control network. The element (SN or SR) returns a query response message; the query response message contains an SNMP read response protocol data unit corresponding to the content of the desired query.

 The present invention utilizes an existing communication protocol between a service control network element (SN or SR) and an AN to perform information inquiry, and expands a small number of SNMP functions in the communication protocol, namely: Introducing an SNMP read request protocol The data unit and the SNMP read response protocol data unit not only implement direct query between the service control network element (SN or SR) and the AN, but also make the information query simple and easy, thereby avoiding the work required in the prior art to modify the protocol stack. Quantity and time cost. DRAWINGS

 1 is a schematic diagram of a network topology diagram of the present invention;

 2 is a schematic flow chart of an implementation principle of the method of the present invention;

 3 is a schematic diagram of a network topology according to an embodiment of the present invention;

4 is a schematic diagram of a network topology applied in Embodiment 2 of the present invention; Figure 5 is a schematic view showing the structure of a system of the present invention. detailed description

 The basic idea of the present invention is: The service control network element sends a diagnostic query message to the AN through the existing communication protocol between the service control network element and the AN, and the diagnostic query message includes an SNMP read request protocol corresponding to the required query content. The data unit (PDU); after receiving the diagnostic query message, the AN returns a query response message to the service control network element, and the returned query response message includes an SNMP read response PDU corresponding to the required query content.

 The service control NE is SN or SR.

 The implementation of the technical solution will be further described in detail below with reference to the accompanying drawings.

 The solution of the present invention is mainly to extend the existing communication protocol between the SN or the SR and the AN, and the extension is to add a part of the SNMP function to the existing communication protocol, that is, in the existing communication protocol. Carrying an SNMP read request (get-request) protocol data unit (PDU) and read-response (PDU) to implement direct information exchange between the SN or the SR and the AN, so that the SN or SR can directly perform the AN diagnosis. Rather than implementing the direct information interaction and direct diagnosis as in the prior art, it is necessary to add a full set of SNMP protocol functions, and the modification of the protocol stack is large, so that the workload and time cost of modifying the protocol stack are greatly enhanced. mouth.

 An access node information query method, the method mainly includes the following contents:

 A: The SN sends a diagnostic query message to the AN through the existing communication protocol between the SN and the AN (or the SR through the existing communication protocol between the SR and the AN), and the diagnostic query message includes the content corresponding to the required query content. SNMP reads the request PDU.

 Here, the existing communication protocol includes: an access control protocol (ANCP protocol, Access Node Control Protocol).

Two: After receiving the diagnostic query message, the AN returns a query response message to the SN (or SR), and the returned query response message includes an SNMP read response PDU corresponding to the required query content. Further, the triggering manner of the method for triggering the diagnosis process includes: the network management system sends a command to the SN (or SR) to trigger the trigger mode of the SN (or SR) diagnosis, the trigger mode of the SN (or SR) automatic diagnosis, or the command line. Manually triggers the triggering of SN (or SR) diagnostics.

 Further, when the network management system sends an instruction to the SN (or SR) to trigger the trigger mode of the SN (or SR) diagnosis, the method includes: when the network management system of the SN (or SR) is diagnosed on demand, such as according to the diagnostic requirement After the SN (or SR) diagnosis sends a diagnostic query to the AN, a diagnostic query message is sent to the AN.

 Further, when the SN (or SR) automatic diagnosis trigger mode is used, the method further includes: SN (or SR) itself diagnoses a problem, such as detecting that the user's heartbeat message is lost, etc., after actively initiating automatic diagnosis of the AN, Send a diagnostic query message to the AN.

 Further, the query result obtained after the SN (or SR) sends the diagnostic query message to the AN is encapsulated in the SNMP read response PDU;

 After the SN (or SR) obtains the query result, the method further includes: the SN (or SR) sends the obtained query result to the network management system and saves, or saves the obtained query result directly on the SN (or SR). Maintenance personnel query through the command line.

 It should be noted that: the application scenarios of the solution of the present invention include: application to a network fault, such as a scenario when a user session is abnormally interrupted; or, when applied to a user, the quality of the service is degraded, for example, when the user complains that the bandwidth does not reach the contract value. Scene. That is to say, the solution of the present invention can be used for diagnosis when the business is completely interrupted or when the quality of the service is degraded. In addition to the above application scenarios, the solution of the present invention can also be applied to scenarios of daily business inspection.

 Figure 1 shows a general architecture of the network topology of the present invention, including a home gateway (RG), an AN, an intermediate network, and an SN.

2 is a schematic flowchart of the implementation principle of the method of the present invention. The process of FIG. 2 includes the following steps: Step 101: The SN sends a diagnostic query message to the AN through a communication protocol between the SN and the AN, where the diagnostic query message includes the required query content. The corresponding SNMP read request PDU. Step 102: After receiving the diagnostic query message, the AN returns a query response message to the SN, where the returned query response message includes an SNMP read response PDU corresponding to the required query content.

 The invention is illustrated by way of example below.

 Embodiment 1: Point-to-point protocol over ethernet (PPPoE) Automatic diagnosis under abnormal user session. The network topology is shown in Figure 3.

 Step 201: The BRAS loses three consecutive times through the user PPP keep alive, and determines that the user session is abnormal.

 In step 202, the access diagnosis mechanism is started, and the BRAS sends a diagnostic query message to the DSLAM through the ANCP, and queries the DSLAM user-side port configuration, the uplink VLAN configuration of the user, the real-time traffic of the uplink and downlink ports, and the CPU usage of the system, respectively, corresponding to different readings. Take the request PDU.

 Step 203: After receiving the diagnostic query message, the DSLAM accesses the local management information base (MIB) according to different read request PDUs, and encapsulates the query result in the read response PDU and sends the result to the BRAS through the ANCP.

 Step 204: The BRAS sends the received query result to the NMS or EMS, or saves it locally for maintenance personnel to query through the command line.

 Example 2: On-demand, user complaints Λ The quality of good service is unstable, and the DSLAM is diagnosed by SR. The network topology is shown in Figure 4.

 Step 301: The service center receives an unstable complaint about the quality of the user service, and notifies the maintenance team to perform fault diagnosis.

 Step 302: First, the SR is diagnosed by the network management system of the SR.

 Step 303: When it is confirmed that the SR is not faulty, use an Ethernet (OAM) operation management and maintenance (OAM) mechanism between the SR and the DSLAM to detect whether the network between the SR and the DSLAM is faulty.

Step 304: If it is confirmed that the network between the SR and the DSLAM is not faulty, check whether the link between the DSLAM and the user RG is normal through the ANCP access link OAM mechanism. Step 305: After confirming that the user access link is normal, the access diagnosis mechanism is started, and the network management system or the command line requests the SR to send a diagnostic query message to the DSLAM, and queries the DSLAM user-side port configuration, the user's uplink VLAN configuration, and the upper and lower interfaces. The real-time traffic of the row port, the CPU usage of the system, and the like correspond to different read request PDUs.

 Step 306: After receiving the diagnostic query message, the DSLAM accesses the local MIB according to different read request PDUs, and encapsulates the query result in the read response PDU and sends the result to the SR through the ANCP.

 Step 307: The SR sends the received query result to the NMS or EMS, or displays it to the maintenance personnel on the command line operation interface.

 Step 308: If the SR finds that the AN is abnormal through the diagnostic query message, the abnormality is reported to the AN maintenance team; if no abnormality is found, it is determined that the internal network of the user is abnormal.

 The third embodiment is to perform the diagnosis on the DSLAM through the SR after receiving the user service interruption complaint of the dynamic host configuration protocol (IPoE, DHCP over Ethernet) on the Ethernet. The network topology is shown in Figure 4.

 Step 401: The service center receives a complaint about user service interruption, and notifies the maintenance team to perform fault diagnosis.

 Step 402: First, the SR is diagnosed by the network management system of the SR.

 Step 403: When it is confirmed that the SR is not faulty, use the Ethernet OAM mechanism between the SR and the DSLAM to detect whether the network between the SR and the DSLAM is faulty.

 Step 404: When it is confirmed that the network between the SR and the DSLAM is not faulty, check whether the link between the DSLAM and the user RG is normal through the ANCP access link OAM mechanism.

 Step 405: After confirming that the user access link is normal, the access diagnosis mechanism is started, and the network management system or the command line requests the SR to send a diagnostic query message to the DSLAM, and queries the DSLAM user-side port configuration, the user's uplink VLAN configuration, and the upper and lower interfaces. The real-time traffic of the row port, the CPU usage of the system, and the like correspond to different read request PDUs.

Step 406: After receiving the diagnostic query message, the DSLAM requests the PDU according to different read requests. The local MIB is accessed, and the query result is encapsulated in the read response PDU and sent to the SR through the ANCP. Step 407: The SR sends the received query result to the NMS or EMS, or displays it to the maintenance personnel on the command line operation interface.

 Step 408: If the SR finds that the AN is abnormal through the diagnostic query message, the abnormality is reported to the AN maintenance team; if no abnormality is found, it is determined that the internal network of the user is abnormal (such as the user

The network cable between the PC and the RG is disconnected, etc.).

 Embodiment 4: Daily inspection of the user's business.

 Step 501: When the user service is normal, the maintenance personnel sends an AN diagnostic query message related to a user service to the SN through the network management system or the command line, and different query contents respectively correspond to different read request PDUs.

 Step 502: After receiving the diagnostic query message, the DSLAM accesses the local MIB according to different read request PDUs, and encapsulates the query result in the read response PDU and sends the SN to the SN through the ANCP.

 Step 503: The SN sends the received query result to the NMS or EMS, or displays it to the maintenance personnel on the command line operation interface.

 Step 504: The maintenance personnel debugs the information through the command line of the network management system or the SN, and analyzes whether the configuration and operation of the service are normal.

 An access node information query system, as shown in FIG. 5, the system includes a service control network element and an AN. The service control network element is configured to perform information query by using an existing communication protocol between the service control network element and the AN. The diagnostic query message is sent to the AN; the diagnostic query message includes an SNMP read request PDU corresponding to the required query content. After receiving the diagnostic query message, the AN returns a query response message to the service control network element. The query response message includes an SNMP read response PDU corresponding to the required query content.

Here, the triggering mode used to trigger the sending of the diagnostic query message is: the network management system sends a command to the service control network element to trigger the triggering of the service control network element diagnosis, the trigger mode of the automatic control of the service control network element, or the command The trigger mode for triggering the service control network element diagnosis. Here, the service control network element is further used when the trigger mode used by the network management system to send a command to the service control network element to trigger the service control network element diagnosis, when the network management system of the service control network element is diagnosed on demand After the diagnosis query of the AN is sent to the service control network element, the service control network element sends a diagnostic query message to the AN.

 Here, when the service control network element is further used in the trigger mode in which the triggering mode is the automatic diagnosis of the service control network element, when the service control network element diagnoses itself, the active control of the AN is initiated, and the service control network element sends the Diagnose the query message to the AN.

 Here, after the service control network element sends a diagnosis query message to the AN, the obtained AN feedback result is encapsulated in the SNMP read response PDU. The service control network element is further used to obtain the query result, and the obtained query result is sent to the network management system for storage, or the obtained query result is directly saved on the service control network element for the maintenance personnel to query through the command line.

 Here, the service control network element is SN or SR.

 The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

Claims

Claim  A method for querying an access node information, the method comprising:  The service control network element sends a diagnostic query message to the access node (AN), where the diagnostic query message includes a Simple Network Management Protocol (SNMP) read request protocol data unit corresponding to the required query content;  After receiving the diagnostic query message, the AN returns a query response message to the service control network element. The query response message includes an SNMP read response protocol data unit corresponding to the required query content.  The method according to claim 1, wherein the triggering method for triggering the sending of the diagnostic query message is: the network management system sends an instruction to the service control network element to trigger the diagnosis of the service control network element. The trigger mode, the trigger mode for automatic diagnosis of the service control NE, or the trigger mode for triggering the service control NE diagnosis through the command line.  The method according to claim 2, wherein, when the network management system sends a triggering manner to the service control network element to trigger the diagnosis of the service control network element, the method further includes: the service control network After the network management system of the element is diagnosed on demand, after the diagnosis query of the AN is sent to the service control network element, the service control network element sends the diagnosis query message to the AN.  The method according to claim 2, wherein, when the service control network element automatically detects the triggering mode, the method further includes: after the service control network element self-diagnosis, actively initiating automatic diagnosis after the AN is initiated The service control network element sends the diagnostic query message to the AN.  The method according to any one of claims 2 to 4, wherein the query result obtained after the service control network element sends the diagnostic query message to the AN is encapsulated in the SNMP read response. In the protocol data unit; After the service control network element obtains the query result, the method further includes: the service control network element sending the query result to the network management system for saving, or directly reporting the query result It is saved on the service control network element for maintenance personnel to query through the command line.  The method according to claim 1, wherein the service control network element is a service control node or a service router.  An access node information query system, wherein the system comprises: a service control network element and an AN;  The service control network element is configured to send a diagnostic query message to the AN, where the diagnostic query message includes an SNMP read request protocol data unit corresponding to the required query content, and the AN is configured to receive the After the query message is diagnosed, the query response message is returned to the service control network element, where the query response message includes an SNMP read response protocol data unit corresponding to the required query content.  The system according to claim 7, wherein the triggering mode used when triggering the sending of the diagnostic query message is: the network management system sends an instruction to the service control network element to trigger a service control network element diagnosis. The trigger mode, the trigger mode for automatic diagnosis of the service control NE, or the trigger mode for triggering the service control NE diagnosis through the command line.  The system according to claim 8, wherein the service control network element is further used to trigger the service control network by using the network management system to send an instruction to the service control network element. In the case of the triggering mode of the meta-diagnosis, after the network management system of the service control network element diagnoses on-demand, after the diagnosis query of the AN is sent to the service control network element, the service control network element sends the Diagnose the query message to the AN.  The system according to claim 8, wherein the service control network element is further used in the case that the trigger mode used for the automatic control of the service control network element is triggered, the service control network After the element self-diagnosis, the service control network element sends the diagnostic query message to the AN after actively initiating automatic diagnosis to the AN. The system according to any one of claims 7 to 10, wherein, after the service control network element sends the diagnostic query message to the AN, the obtained AN feedback query is obtained. The result is encapsulated in the SNMP read response protocol data unit;  The service control network element is further configured to send the query result to the network management system for saving, or save the query result directly on the service control network element for maintenance. The person queries through the command line.  The system according to claim 7, wherein the service control network element is a service control node or a service router.