CN101094122A - Monitoring system and method in use for WiMAX network - Google Patents

Abstract

The invention discloses a monitoring system and monitoring method for a WiMAX network. Wherein, the monitoring system includes: a monitoring server, located in the WiMAX connection service network, used to request the monitoring agent to set the user equipment to be monitored in the monitored state, and to query the monitoring agent for relevant information of the user equipment to be monitored, and to The information center forwards the relevant information of the user equipment to be monitored; the monitoring agent, located in the WiMAX network, is used to respond to the request of the monitoring server, set the user equipment to be monitored as the monitored state, and collect relevant information of the user equipment to be monitored , and report the relevant information of the user equipment to be monitored to the monitoring server; and the information center is used to manage the user equipment to be monitored and to process the relevant information of the user equipment to be monitored. The invention satisfies the requirements of legal interception standards in different countries and regions, and fills up the blank of legal interception in the current WiMAX NWG protocol.

Description

Monitoring system and monitoring method for WiMAX network

technical field

The present invention relates to the communication field, and more particularly relates to a monitoring system and monitoring method for a WiMAX network.

Background technique

Lawful interception has been widely used in the current communication field. 3GPP, 3GPP2 and other core network equipment can provide interfaces with the Police Information Center (Lawful Information Center, LIC for short). According to the International Mobile Station Identity (IMSI) or the Network Access Identifier (NAI) in the Mobile Switching Center (MSC), Gateway Mobile Switching ( GatewayMobile Switching Center (GMSC for short), HomeLocation Register (HLR for short), Short Message Center (SMC for short), Packet Data Serving Node (PDSN for short), and authentication, authorization and The billing server (Authentication, Authorization and Accounting, referred to as AAA) and other network element devices are deployed and controlled, and the controlled network element controls the traffic activities (including voice calls/data calls/packet data services) and non-traffic activities (including supplementary Service activation/deactivation/registration/deregistration/query short message etc.) are sent to the police information center through the police monitoring interface, and the police information center collects and reports the events and communication contents of the accused target, and analyzes the collected information is processed.

The Worldwide Interoperability for Microwave Access (WiMAX) network will provide wireless broadband connectivity in fixed, mobile, and portable forms, and will eventually provide mobile wireless broadband connectivity without the need for direct line-of-sight base stations. With the wide application of WiMAX networks, the lawful interception function of WiMAX networks also arises in response to market demands.

At present, there are many kinds of legal interception standards in the communication field, and different countries and regions may designate their own standards. At present, there are three standards with great influence, which are formulated by the European Telecommunications Standards Institute (ETSI). The legal monitoring of ETSI ES 201 671 agreement, the World Wireless Communication Solutions Alliance ATIS and the American Communications Industry Association TIA designated legally authorized electronic monitoring (Communications Assistance for Law Enforcement Act, referred to as CALEA) standard (corresponding agreement number ANSI/J-STD -025-B-2006), and the People's Republic of China communications industry standard police interface technical specification family (including CDMA2000, TDMA police interface technical specifications, etc.).

The WiMAX Network Working Group (Network Work Group, referred to as NWG) is a working group under the WiMAX organization dedicated to studying the network architecture and reference model defined by the WiMAX system. At present, the working group has begun to study a lawful interception system that conforms to the lawful interception framework and meets the needs of the expanded WiMAX application. But so far there is no mature solution and network reference model.

Contents of the invention

In view of one or more of the above problems, a monitoring system and monitoring method for WiMAX networks are provided.

The monitoring system according to the present invention includes: a monitoring server, located in the WiMAX connection service network, used to request the monitoring agent to set the user equipment to be monitored in the monitored state, and to query the monitoring agent for relevant information of the user equipment to be monitored, and Forward the relevant information of the user equipment to be monitored to the information center; the monitoring agent, located in the WiMAX network, is used to respond to the request of the monitoring server, set the user equipment to be monitored to the monitored state, and collect relevant information of the user equipment to be monitored. Information, and report the relevant information of the user equipment to be monitored to the monitoring server; and the information center is used to manage the user equipment to be monitored and to process the relevant information of the user equipment to be monitored.

The monitoring method according to the present invention includes the following steps: S202, the monitoring server sends the identification information of the user equipment to be monitored to the monitoring agent, and requests the monitoring agent to set the user equipment to be monitored in the monitored state; S204, the monitoring agent responds to the request of the monitoring server, According to the identification information of the user equipment to be monitored, the user equipment to be monitored is set to the monitored state; S206, the monitoring agent collects relevant information of the user equipment to be monitored, and reports the relevant information of the user equipment to be monitored to the monitoring server; and S208, The monitoring server forwards the relevant information of the user equipment to be monitored to the information center, and the information center processes the relevant information of the user equipment to be monitored.

The invention satisfies the requirements of legal interception standards in different countries and regions, and fills up the blank of legal interception in the current WiMAX NWG protocol.

Description of drawings

The accompanying drawings described here are used to provide a further understanding of the present invention and constitute a part of the application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations to the present invention. In the attached picture:

FIG. 1 is a block diagram of a monitoring system for a WiMAX network according to an embodiment of the present invention;

Fig. 2 is a flow chart of the monitoring method implemented by the monitoring system for a WiMAX network according to an embodiment of the present invention;

FIG. 3 is a schematic flow diagram of a monitoring system for a WiMAX network deploying and controlling user equipment on AAA and querying a list of controlled user equipment identifiers according to an embodiment of the present invention;

FIG. 4 is a flow chart of deploying and controlling user equipment on the HA/CR and querying the list of controlled user equipment identifiers by the monitoring system for a WiMAX network according to an embodiment of the present invention;

FIG. 5 is a flow chart of deploying and controlling user equipment on an AGW and querying a list of controlled user equipment identifiers by a monitoring system for a WiMAX network according to an embodiment of the present invention; and

Fig. 6 is a flow chart of reporting a monitoring event and communication content by a monitoring system for a WiMAX network according to an embodiment of the present invention.

Detailed ways

The specific implementation manners of the present invention will be described in detail below with reference to the accompanying drawings.

Referring to FIG. 1 , the structure of a lawful interception system for a WiMAX network according to an embodiment of the present invention is illustrated. As shown in Figure 1, the lawful interception system includes:

Lawful Interception Server (Lawful Interception Server, LIS for short) 102 . It is a functional entity located in a WiMAX connectivity service network (Connectivity Service Network, CSN for short). It mainly includes the following functions: providing a graphical user interface (Graphical User Interfaces, referred to as GUI), Telnet remote login mode, and external interfaces that meet the monitoring standards of various countries, setting monitoring users and querying the list of accused user IDs; providing police information centers (Lawful Information Ceneter, referred to as LIC) monitoring data output interface, complete the output and reporting of the monitored user's monitoring information; and provide an interactive interface with network elements that support legal monitoring in the WiMAX system, and set the controlled user and the network element that accepts it. Report monitoring information.

Lawful Interception Agent (Lawful Interception Agent, LIA for short) 104 . It is located in various network elements of the WiMAX network, provides an interface with the LIS, and completes the collection and reporting of monitoring events and monitoring data. Among them, there are three types of LIA:

LIA located on the authentication, authorization and accounting (Authentication, Authorization and Accounting, referred to as AAA) server. Among them, AAA is used to provide authentication, authorization and accounting services for users. When AAA receives the terminal access request sent by the access server, it will authenticate the terminal and perform corresponding authorization. The LIA located in the AAA mainly includes the following functions: receiving LIS deployment and control instructions, setting monitoring users on the AAA according to the monitoring identifier; receiving LIS query instructions, querying the user’s monitoring identifier according to the NAI and querying the NAI according to the monitoring identifier; and receiving LIS’s Query command, query and return the list of monitored user monitoring IDs on the current AAA; when it belongs to AAA, collect the content of authentication events and accounting events of the controlled user and send them to the LIS.

The LIA located on the home agent (Home Agent, HA for short) or core router (CoreRouter, CR for short). Among them, HA/CR is used to receive the mobile IP registration request sent by the access server or the routing redirection function of the simple IP, and respond to the mobile IP registration or simple IP routing redirection, and cooperate with the access service gateway to provide IP services for the terminal . The LIA located in HA/CR mainly includes the following functions: receiving LIS deployment and control instructions, setting monitoring users on HA/CR according to the monitoring identifier; receiving LIS query instructions, querying and returning the list of monitored user monitoring identifiers on the current HA/CR ; Collect the mobile IP registration event and route binding update event information of the accused user and send them to the LIS.

The LIA located on the Access Service Network Gateway (AGW for short). Among them, the AGW is used to provide users with access services. The LAI located in the AGW network element of the WiMAX network mainly includes the following functions: receiving the deployment and control command of the LIS, setting the monitoring user on the AGW according to the monitoring ID; receiving the query command of the LIS, querying and returning the list of monitored user monitoring IDs on the current AGW; Collect the group session creation event, group session release event, group session switching event, user online notification event of the controlled user, and collect the communication content of the controlled user when serving as the anchor AGW, and send it to the LIS.

Police information center (Lawful Information Center, referred to as LIC) 106. It is a police device installed in the Law Enforcement Agency (LEA), not a communication operator's device. It mainly completes the management of the accused target, collects the events and communication content of the accused target reported by the LIS, and processes the collected information. The interface between LIC and LIS is implemented by the lawful interception norms of different countries.

Among them, in order to ensure the reliable and chronological transmission of the monitoring information, the LIS and the LIA use the TCP protocol for communication. The interface between LIS and LIC is defined by the external interface specifications of different national standards, and LIS has the adaptability of various external interfaces. The authentication, authorization and billing server statically assigns an interception ID to each user, and can maintain the corresponding relationship between the user's NAI and the interception ID, ensuring that the AAA internal interception ID is unique and corresponds to the NAI one by one. Wherein, the intercepting identifier adopts a globally unique code, that is to say, the intercepting identifier between roaming networks must be unique.

Referring to FIG. 2 , a flow of a lawful interception method implemented by a lawful interception system for a WiMAX network according to an embodiment of the present invention is illustrated. As shown in Figure 2, the legal interception method includes the following steps: S202, the interception server sends the identification information of the user equipment to be monitored to the interception agent, and requests the interception agent to set the user equipment to be monitored in the monitored state; S204, the interception agent responds to According to the request of the listening server, according to the identification information of the user equipment to be monitored, set the user equipment to be monitored to the monitored state; S206, the monitoring agent collects relevant information of the user equipment to be monitored, and reports the relevant information of the user equipment to be monitored to the monitoring The server; and S208, the monitoring server forwards the relevant information of the user equipment to be monitored to the information center, and the information center processes the relevant information of the user equipment to be monitored.

Among them, law enforcement agencies set up and control user equipment among WiMAX network members through the interface with the legal interception server, or directly use the graphical user interface/Telnet provided by LIS; Authentication, the LIA on the AAA reports the authentication event of the user equipment to the LIS; when the LIS sets the controlled user equipment to the AGW, if the controlled user equipment is already online, it will directly report the online event of the user equipment through the LIA and LIS interfaces on the AGW; The controlled user equipment access authentication succeeds, the anchor AGW establishes a group session for the user equipment successfully or fails, the LIA on the AGW needs to report the event to the LIS; the controlled user equipment initiates mobile IPv4 registration and IPv6 binding update to the HA/CR or a routing update event, the LIA on the HA/CR reports the event to the LIS; the accused user equipment starts using WiMAX data services, and when the AGW generates an accounting message to the AAA, the LIA on the AAA reports the accounting event to the LIS; When the user equipment starts using WiMAX data services, the anchor AGW copies the communication packets of the controlled user equipment and reports them to the LIS through its LIA; when the controlled user equipment initiates a packet session handover, the LIA on the AGW reports the content of the handover event to the LIS.

Referring to FIG. 3 , it illustrates the flow of the lawful interception system for WiMAX network deploying and controlling user equipment on AAA and querying the controlled user equipment identification list according to the embodiment of the present invention. As shown in Figure 3, the process includes the following steps:

S302. The police information center (LIC) requests the WiMAX legal interception server (LIS) to deploy and control the user equipment, carrying the real network access identifier (NAI) or interception identifier of the user equipment;

S304, the legal interception server (LIS) sends a request to the authentication, authorization and accounting server (AAA), and sets the monitoring user equipment;

S306, the legal intercept agent (LIA) in the AAA sets the user equipment to be monitored according to the NAI or the intercept identifier in the request, and the authentication, authorization, and accounting server (AAA) replies a response message to the legal intercept server (LIS), indicating deployment and control If successful, the message carries the interception identifier or NAI of the controlled user equipment (if the request carries NAI, the response returns the interception identifier, and vice versa);

S308, the legal interception server (LIS) receives the response from the AAA, assembles an interface that meets the protocol requirements of the police information center (LIC), and sends it to the police information center (LIC), to complete the user deployment and control function;

S310, the Police Information Center (LIC) requests the WiMAX Lawful Interception Server (LIS) to inquire about the list information of the controlled user equipment on the AAA in the current network;

S312, the Lawful Interception Server (LIS) sends a request to the Authentication, Authorization and Accounting Server (AAA), requesting the AAA to return the identification list of the current controlled user equipment;

S314, the lawful interception agent (LIA) in the authentication, authorization and accounting server (AAA) queries the identification information list of all user equipments currently charged, including user NAI and interception identification, and sends a response message to the lawful interception server ( LIS) returns;

S316, the legal intercept server (LIS) receives the response from the authentication, authorization and accounting server (AAA), assembles an interface that meets the protocol requirements of the police information center (LIC), sends it to the police information center (LIC), and completes the query The function of the identification list of the controlled user equipment.

Referring to FIG. 4 , the flow of the lawful interception system for WiMAX network deploying and controlling user equipment on the HA/CR and querying the identification list of the controlled user equipment according to an embodiment of the present invention is illustrated. As shown in Figure 4, the process includes the following steps:

S402. The police information center (LIC) requests the WiMAX legal interception server (LIS) to deploy and control the user equipment, carrying the real network access identifier (NAI) or interception identifier of the user equipment;

S404, the legally intercepted server (LIS) receives the request of the Police Information Center (LIC), if it carries the interception identification, it directly enters step S408; if it carries the NAI, it needs to submit the request to the authentication, authorization and accounting server ( AAA) querying the monitoring identification of the user equipment;

S406, the authentication, authorization and accounting server (AAA) receives the request, queries the monitoring identification information of the user equipment according to the real NAI of the user equipment, and sends it to the LIS;

S408, the LIS sends a request to the Home Agent/Core Router (HA/CR), sets and monitors the user equipment, and carries the monitoring identifier;

S410, the home agent/core router (HA/CR) receives the LIS deployment control request, sets the user equipment to be monitored, and sends a response message to the legal interception server (LIS);

S412, the legal interception server (LIS) receives the response from the home agent/core router (HA/CR), assembles an interface that meets the protocol requirements of the Police Information Center (LIC), and sends it to the LIC to complete the deployment and control function of the user equipment;

S414, the Police Information Center (LIC) requests the WiMAX Lawful Interception Server (LIS) to query the list information of the controlled user equipment on the HA/CR in the current network;

S416, the lawful interception server (LIS) sends a request to the HA/CR, requesting the AAA to return the identification list of the currently charged user equipment;

S418, the legal interception agent (LIA) in the home agent/core router (HA/CR) inquires about the identification information list of all user equipments currently charged, mainly the user interception identification, and sends a response message to the legal interception server (LIS) return;

S420, the legal interception server (LIS) receives the response from the home agent/core router (HA/CR), assembles an interface that meets the protocol requirements of the police information center (LIC), sends it to the police information center (LIC), and completes the query and is accepted. The function of controlling the identification list of user equipment.

Referring to FIG. 5 , the flow of the lawful interception system for WiMAX network deploying and controlling user equipment on the AGW and querying the identification list of the controlled user equipment according to an embodiment of the present invention is illustrated. As shown in Figure 5, the process includes the following steps:

S502. The police information center (LIC) requests the WiMAX legal interception server (LIS) to deploy and control the user equipment, carrying the real network access identifier (NAI) or interception identifier of the user equipment;

S504, the legally intercepted server (LIS) receives the police information center (LIC) request, if what carries is to intercept identification, then directly enters step S508; If what carries is NAI, then needs to authenticate, authorize and account server (AAA ) to query the monitoring identifier of the user equipment;

S506, the authentication, authorization and accounting server (AAA) receives the request, queries the interception identification information of the user equipment according to the real NAI of the user equipment, and sends it to the legal interception server (LIS);

S508, the legal interception server (LIS) sends a request to the access service gateway (AGW), sets the monitoring user equipment, and carries the interception identifier;

S510, the access service gateway (AGW) receives the control request from the legal interception server (LIS), sets the user equipment to be monitored, and sends a response message to the legal interception server (LIS);

S512, the legal interception server (LIS) receives the response from the access service gateway (AGW), assembles an interface that meets the protocol requirements of the police information center (LIC), sends it to the police information center (LIC), and completes the deployment and control function of the user equipment ;

S514, if the access service gateway (AGW) finds that the current controlled user equipment is already online, actively notify the legal interception server (LIS), and report the content of the online event of the controlled user equipment; otherwise, directly enter step S518;

S516, the legal interception server (LIS) receives the content of the online event of the accused user equipment, assembles an interface that meets the protocol requirements of the police information center (LIC), and sends it to the police information center (LIC);

S518, the Police Information Center (LIC) requests the WiMAX Lawful Interception Server (LIS) to query the list information of the controlled user equipment on the Access Service Gateway (AGW) in the current network;

S520, the legal interception server (LIS) sends a request to the access service gateway (AGW), requesting the access service gateway (AGW) to return the identification list of the currently controlled user equipment;

S522, the legal interception agent (LIA) in the access service gateway (AGW) queries the identification information list of all user equipments currently charged, mainly the user monitoring identification, and returns to the legal interception server (LIS) in the response message;

S524, the legal interception server (LIS) receives the response from the access service gateway (AGW), assembles an interface that meets the protocol requirements of the police information center (LIC), sends it to the police information center (LIC), and completes the query of the charged user equipment A function that identifies a list.

Referring to FIG. 6 , the process of reporting an interception event and communication content by a lawful interception system for a WiMAX network according to an embodiment of the present invention is illustrated. As shown in Figure 6, the process includes the following steps:

S602, the controlled user equipment performs access authentication and request authorization to the home authentication, authorization and accounting server (AAA) through the Extensible Authentication Protocol (EAP for short);

S604, after the authentication of the home authentication, authorization and accounting server (AAA) is successful or rejected, the authentication event information of the accused user equipment is sent to the lawful interception server (LIS), and the LIS assembles the external interface protocol and sends it to the police information center (LIC );

S606, after the controlled user equipment passes the authentication, obtain authorization information, and access the service gateway (AGW) to establish a data channel successfully;

S608, the access service gateway (AGW) sends the group session establishment event information of the controlled user equipment to the legal interception server (LIS), and the LIS assembles an external interface protocol and sends it to the police information center (LIC);

S610, the controlled user equipment initiates a mobile IP registration/simple IP routing registration process to the home agent/core router (HA/CR);

S612, the home agent/core router (HA/CR) sends the mobile IP registration/simple IP routing registration event information of the charged user equipment to the legal interception server (LIS), and the LIS assembles the external interface protocol and sends it to the police information center (LIC );

S614, after the user equipment obtains the IP address, the network starts charging for the user equipment, and the access service gateway (AGW) initiates a charging start process to the home authentication, authorization and accounting server (AAA);

S616, if the police information center (LIC) is required to collect the charging start information of the user equipment, the home authentication, authorization and accounting server (AAA) sends the charging start event to the legal interception server (LIS), and the LIS assembles the external interface The protocol is sent to the Police Information Center (LIC);

S618, the controlled user equipment uses the WiMAX data service, and the access service gateway (AGW) used at this time is both an anchor point and a service point;

S620, the access service gateway (AGW) copies the communication data of the controlled user equipment, packages and sends it to the legal interception server (LIS), and the LIS assembles an external interface protocol and sends it to the police information center (LIC);

S622, sometimes, the controlled device will be switched due to moving between different AGW coverages, which will cause a switching process between AGWs, and the service point will be switched first, and the service point will be switched from the original access service gateway (AGW) To the Target Access Service Gateway (T-AGW);

S624, the original access service gateway (AGW) sends the handover event information of the charged user equipment to the legal interception server (LIS), and the LIS assembles an external interface protocol and sends it to the police information center (LIC);

S626, the target access service gateway (AGW) sends the handover event information of the controlled user equipment to the legal interception server (LIS), and the LIS assembles an external interface protocol and sends it to the police information center (LIC);

S628, the controlled user equipment continues to use the WiMAX data service. At this time, the original access service gateway (AGW) is the anchor point, and the target access service gateway (T-AGW) is the service point, both of which are on the data channel of the user equipment ;

S630, the original access service gateway (AGW) as the anchor point copies the communication data of the controlled user equipment, packages and sends it to the legal interception server (LIS), and the LIS assembles an external interface protocol and sends it to the police information center (LIC);

S632, after the location of the controlled user equipment moves, initiate a handover process between the AGWs, and then switch the anchor point, and the anchor point is switched from the original access service gateway (AGW) to the target access service gateway (T-AGW);

S634, the original access service gateway (AGW) sends the handover event information of the charged user equipment to the legal interception server (LIS), and the LIS assembles an external interface protocol and sends it to the police information center (LIC);

S636, the target access service gateway (AGW) sends the handover event information of the controlled user equipment to the legal interception server (LIS), and the LIS assembles an external interface protocol and sends it to the police information center (LIC);

S638. The controlled user equipment continues to use the WiMAX data service. At this time, the original access service gateway (AGW) has nothing to do with the data channel of the controlled user equipment, and the target access service gateway (T-AGW) is both an anchor point and a service point. Only the target access service gateway (T-AGW) is on the data channel of the user equipment;

S640: the target access service gateway (T-AGW) sends the handover event information of the accused user to the legal interception server (LIS), and the LIS assembles the police information center (LIC) sent by the external interface protocol;

S642. The controlled user equipment goes offline or the network side releases the session of the controlled user equipment;

S644. The target access service gateway (T-AGW) sends the packet session release event information of the controlled user equipment to the lawful interception server (LIS), and the LIS assembles the external interface protocol and sends it to the police information center (LIC).

The invention provides a legal interception network architecture supported by various legal interception protocols for the WiMAX network. Among them, the legal intercept function entities LIS and LIA do not need to care about the roaming situation of the user equipment, but only need to manage the situation of the controlled user equipment of the network element, so the complicated process of interaction between network elements caused by tracking the position change of the user equipment is reduced . In addition, the present invention has strong expansibility, and for different external legal interception interface specifications, it only needs to adapt and develop the protocol through LIS, so it has little influence on the whole framework.

The above description is only an embodiment of the present invention, and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of the claims of the present invention.

Claims (18)

1. A monitoring system for WiMAX network, characterized in that, comprising: The monitoring server, located in the WiMAX connection service network, is used to request the monitoring agent to set the user equipment to be monitored in the monitored state, and to query the monitoring agent about the relevant information of the user equipment to be monitored, and forward it to the information center The relevant information of the user equipment to be monitored; The monitoring agent, located in the WiMAX network, is used to respond to the request of the monitoring server, set the user equipment to be monitored to a monitored state, and collect relevant information of the user equipment to be monitored, and set Reporting relevant information of the user equipment to be monitored to the monitoring server; and The information center is configured to manage the user equipment to be intercepted, and to process related information of the user equipment to be intercepted. 2. The monitoring system according to claim 1, wherein the monitoring agent is located in an authentication, authorization and charging server, and is used to collect information related to authentication events and/or charging events of the user equipment to be monitored . 3. The monitoring system according to claim 1, wherein the monitoring agent is located in a home agent or a core router, and is used to collect the mobile IP registration event and/or routing binding update event of the user equipment to be monitored Related Information. 4. The monitoring system according to claim 1, wherein the monitoring agent is located on the access service network gateway, and is used to collect the packet session creation event, the packet session release event, and the packet session event of the user equipment to be monitored. Handover events, user presence notification events, and/or information about the content of user communications. 5. The monitoring system according to claim 1, 2, 3 or 4, characterized in that, the monitoring server has the adaptability of various external interfaces. 6. The monitoring system according to claim 5, wherein the monitoring server requests the monitoring agent to set the user equipment to be monitored by sending the identification information of the user equipment to be monitored to the monitoring agent. in the monitored state. 7 . The interception system according to claim 6 , wherein the identification information of the user equipment to be intercepted is a network access identifier or an interception identifier of the user equipment to be intercepted. 8. The monitoring system according to claim 8, characterized in that, the monitoring identification of the user equipment to be monitored is that the authentication, authorization and accounting server pre-identifies the user equipment according to the network access identification of the user equipment to be monitored. The user equipment to be intercepted is set, and the network access identifier of the user equipment to be intercepted is in a one-to-one correspondence with the interception identifier. 9. A monitoring method for a WiMAX network, comprising the following steps: S202. The monitoring server sends identification information of the user equipment to be monitored to the monitoring agent, and requests the monitoring agent to set the user equipment to be monitored in a monitored state; S204, the monitoring agent responds to the request of the monitoring server, and sets the user equipment to be monitored as a monitored state according to the identification information of the user equipment to be monitored; S206, the monitoring agent collects the relevant information of the user equipment to be monitored, and reports the relevant information of the user equipment to be monitored to the monitoring server; and S208. The monitoring server forwards the relevant information of the user equipment to be monitored to the information center, and the information center processes the relevant information of the user equipment to be monitored. 10 . The interception method according to claim 9 , wherein the identification information of the user equipment to be intercepted is a network access identifier or an interception identifier of the equipment to be intercepted. 11 . 11. The interception method according to claim 10, wherein the interception agent is located in an authentication, authorization, and accounting server. 12. The monitoring method according to claim 10, wherein the monitoring identification of the user equipment to be monitored is pre-set by the authentication, authorization, and accounting server according to the network access identification of the device to be monitored. The network access identifier of the user equipment to be intercepted is set by the user equipment to be intercepted, and there is a one-to-one correspondence with the interception identifier. 13. The interception method according to claim 12, wherein the interception agent is located in a home agent or a core router. 14. The monitoring method according to claim 13, wherein when the identification information of the user equipment to be monitored sent by the monitoring server to the monitoring agent is the monitoring identifier of the user equipment to be monitored The monitoring agent directly sets the user equipment to be monitored as the monitored state according to the monitoring identification of the user equipment to be monitored. 15. The monitoring method according to claim 13, wherein when the identification information of the user equipment to be monitored sent by the monitoring server to the monitoring agent is the network access information of the user equipment to be monitored When identifying, the interception agent first obtains the interception identifier of the user equipment to be intercepted from the authentication, authorization, and accounting server, and then sends the interception identifier of the user equipment to be intercepted The user equipment is set to be monitored. 16. The monitoring method according to claim 12, wherein the monitoring agent is located on the access service network gateway. 17. The monitoring method according to claim 16, wherein when the identification information of the user equipment to be monitored sent by the monitoring server to the monitoring agent is the monitoring identifier of the user equipment to be monitored The monitoring agent directly sets the user equipment to be monitored as the monitored state according to the monitoring identification of the user equipment to be monitored. 18. The monitoring method according to claim 17, wherein when the monitoring server sends the identification information of the user equipment to be monitored to the monitoring agent, the network access of the user equipment to be monitored is When identifying, the interception agent first obtains the interception identifier of the user equipment to be intercepted from the authentication, authorization, and accounting server, and then sends the interception identifier of the user equipment to be intercepted The user equipment is set to be monitored.

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