CN100499906C - Method for realizing legal monitoring - Google Patents

Abstract

A method for realizing legal interception. The interception system sends a target user equipment operation request to an attribution information storage, which carries a target user equipment identifier and corresponding interception parameters, and the attribution information storage records the interception parameters of the target user equipment; the attribution information storage sends The short message center and the serving mobile switching center to which the target user equipment belongs send a monitoring parameter operation request, which carries the target user equipment identifier and corresponding monitoring parameters, and the short message center and the serving mobile switching center record the monitoring corresponding to the target user equipment Parameters; the short message center and the serving mobile switching center to which the target user equipment belongs determine whether to monitor the communication activities of the target user equipment according to the monitoring parameters. Through the method proposed by the invention, while ensuring that the monitoring system completes the tracking and monitoring of the communication activities of the target user equipment, the storage of redundant information is reduced, the complexity of the operation is reduced, and the setting of the interface is simplified.

Description

A Method to Realize Lawful Interception

technical field

The invention relates to interception technology, in particular to a method for realizing legal interception.

Background technique

Lawful interception refers to the activities of national security agencies to monitor telecommunications services within the scope permitted by law. Any surveillance activities should be authorized by the relevant state departments. According to the requirements of the national security department, all mobile communication networks in operation, including Global System for Mobile Communication (GSM, Global System for Mobile Communication), Code Division Multiple Access Communication System (CDMA, Code Division Multiple Access), and future broadband Code Division Multiple Access Communication systems (W-CDMA, Wide Code Division Multiple Access), etc. must enable the national security department to monitor the target user equipment and provide a monitoring interface for monitoring. The monitoring system of the national security department is connected to the mobile communication network through the monitoring interface to monitor the target user equipment. The target user equipment refers to the monitored communication terminal.

Fig. 1 is a schematic diagram of the relationship between the monitoring system and the mobile communication network, as shown in Fig. communication activities. The monitoring interface 103 refers to the monitoring access interface provided by the physical device with the monitoring function in the mobile communication network, and the monitoring system is connected with the physical device with the monitoring function in the mobile communication network through this interface. The monitoring system 102 is bounded by the monitoring interface 103, and is a general term for all devices related to monitoring activities in the mobile communication network other than physical devices capable of monitoring, including at least monitoring access devices and monitoring center devices. The mobile communication network 101 provides a monitoring access function for the monitoring system 102, and the monitoring system 102 requires the mobile communication network 101 to monitor the communication activities of the target user equipment through the monitoring interface 103. When the target user equipment communicates, the mobile communication network 101 reports the relevant events and communication content of the communication activity to the monitoring system 102 through the monitoring interface 103; the monitoring system 102 manages the monitoring activities, and collects, stores and analyzes the information of the target user equipment communication information.

In the existing monitoring technical standards, the services that can be monitored include: voice service, fax service, asynchronous data service, short message service and supplementary service. In the GSM communication system and CDMA communication system, the equipment required to provide monitoring and access functions includes: Home Location Register (HLR, HomeLocation Register), Mobile Switching Center (MSC, Mobile Switch Center) and Short Message Center (SMC, Short Message Center) ).

Fig. 2 is the monitoring interface synoptic diagram of monitoring system and mobile communication network, as shown in Figure 2, the monitoring system 102 that is positioned at national security department is connected with MSC202, HLR 203 and SMC 204 that are positioned at mobile communication network by X interface 201, realizes to Monitoring of communication activities such as voice service, fax service, asynchronous data service, short message service, and supplementary service of the target user equipment. HLR 203 is connected with MSC 202 and SMC 204 respectively.

Fig. 3 is the monitoring interface structure schematic diagram between monitoring system and MSC, as shown in Figure 3, the X interface between monitoring system 102 and MSC 202 comprises: signaling interface X1, service interface X2 and X3. The X1 interface realizes the management of monitoring activities, including the setting, query, cancellation, etc. of the target user equipment; the X2 interface reports the communication activity-related events and short messages of the target user equipment to the monitoring system 102; the X3 interface reports the target user equipment to the monitoring system communication content, such as call voice. The transmission bearer of the X1 interface and the X2 interface is Transmission Control Protocol (TCP)/Internet Protocol (IP) or X.25; the transmission bearer of the X3 interface is an E1 link.

FIG. 4 is a schematic structural diagram of the monitoring interface between the monitoring system and the HLR/SMC. As shown in FIG. 4, the X interface between the monitoring system 102 and the HLR/SMC includes: a signaling interface X1 and a service interface X2. The X1 interface implements the management of monitoring activities, including setting, querying, and canceling of target user equipment. The X2 interface reports events related to communication activities of the target user equipment to the monitoring system 102 . The transmission bearer of the X1 interface and the X2 interface is TCP/IP or X.25. Since the HLR reports the communication activity related event of the target user equipment to the monitoring system 102, and the SMC reports the short message event of the target user equipment to the monitoring system 102, the HLR and the SMC do not monitor the voice service, so the X interface between the monitoring system 102 and the HLR/SMC There is no X3 interface.

In order to realize the monitoring of the target user equipment when it moves between MSCs, the monitoring system must set the target user equipment in all MSCs connected to it. If the target user equipment moves to an MSC where the target user equipment is not set, the communication activities of the target user equipment cannot be monitored. Figure 5 is a schematic diagram of the monitoring of target user equipment moving between MSCs. As shown in Figure 5, the target user equipment moves from MSC1 to MSC2, and finally to MSCn. The monitoring system 102 must be connected to MSC1, MSC2... ..the target user equipment is set in MSCn, so as to monitor the communication activities of the target user equipment. If the monitoring system 102 does not set the target user equipment in MSCn, the monitoring system will not be able to monitor the communication activities of the target user equipment after the target user equipment moves to MSCn. It can be seen that when the target user equipment moves between MSCs, in order to monitor its communication activities, the monitoring system needs to perform n target user equipment setting operations, and there are n-1 target user equipment monitoring parameters stored in the MSC is redundant and invalid. n indicates that there are several MSCs connected to the monitoring system, and the value of n depends on the monitoring range of the monitoring system. If the monitoring range of the monitoring system is a province, all MSCs in the province are connected to the monitoring system.

From the above, it can be seen that to realize the monitoring of the communication activities of the target user equipment in the process of moving between MSCs, it is necessary to set the target user equipment in all MSCs connected to the monitoring system, causing the monitoring system to perform multiple redundant operations. The setting operation of the target user equipment results in the storage of a large amount of redundant information in the other MSCs except the serving MSC; the monitoring system needs to set the target user equipment in the MSC, HLR and SMC respectively, which makes the setting operation process of the target user equipment complicated The X interfaces connecting the monitoring system with MSC, HLR and SMC all include the X1 interface, so the monitoring interface is relatively complicated.

Contents of the invention

In view of this, the purpose of the present invention is to provide a method for realizing legal interception, which can reduce the storage of redundant information, reduce the complexity of operation, and simplify the interception while ensuring that the interception system completes the tracking and monitoring of the communication activities of the target user equipment. interface settings.

In order to achieve the above-mentioned purpose, the present invention provides a kind of method that realizes lawful interception, and this method comprises the following steps:

A. The monitoring system sends a target user equipment operation request to the attribution information storage, the target user equipment operation request carries the target user equipment identifier and corresponding monitoring parameters, and the attribution information storage records the monitoring parameters of the target user equipment;

B. The attribution information store sends a monitoring parameter operation request to the short message center and the serving mobile switching center to which the target user equipment belongs. The monitoring parameter operation request carries the identification of the target user equipment and the corresponding monitoring parameters. The switching center records the monitoring parameters corresponding to the target user equipment;

C. The short message center and the serving mobile switching center to which the target user equipment belongs judge whether it is necessary to monitor the communication activities of the target user equipment according to the monitoring parameters, and if so, the short message center and the serving mobile switching center according to the monitoring parameters Monitor the communication activities of the target user equipment, and report the communication activities related events and communication content to the monitoring system, otherwise, the short message center and the serving mobile switching center will not monitor the communication activities of the target user equipment.

Said step B further comprises:

B1, the attribution information storage device first determines whether the target user equipment is in a power-on state before sending the monitoring parameter operation request, and if so, the attribution information storage unit sends a monitoring parameter operation request to the short message center and the serving mobile switching center to which the target user equipment belongs; otherwise , execute step B2;

B2. The attribution information storage only sends the monitoring parameter operation request to the short message center.

The step B2 further includes: when the target user equipment is turned on, the attribution information storage device sends a monitoring parameter operation request carrying the target user equipment identifier and corresponding monitoring parameters to the serving mobile switching center to which the target user equipment currently belongs, and the serving mobile The switching center records the monitoring parameters corresponding to the target user equipment.

When the serving mobile switching center to which the target user equipment belongs changes, the step B is: the attribution information store sends a monitoring parameter operation request to the serving mobile switching center to which the target user equipment is moved, and the monitoring parameter operation request carries the target user equipment The identifier and the interception parameters corresponding thereto, the serving mobile switching center stores the interception parameters corresponding to the target user equipment.

The step B further includes: after the target user equipment registers its location in the home information storage through the serving mobile switching center to which it belongs, the home information storage judges whether the user equipment currently undergoing location registration is a communication activity that needs to be set by the monitoring system If the target user equipment for monitoring is yes, it sends a monitoring parameter operation request to the serving mobile switching center to which the target user equipment belongs; otherwise, no subsequent processing is performed.

The step B further includes: the attribution information store sends a monitoring parameter operation request carrying the identification of the target user equipment to the serving mobile switching center to which the target user equipment belongs before the move, and the serving mobile switching center deletes the monitoring parameter corresponding to the target user equipment .

The step B further includes: when the target user equipment is powered off, the serving mobile switching center to which the target user equipment belongs automatically deletes the monitoring parameters corresponding to the target user equipment.

Preferably, the step A further includes: after the attribution information storage device receives the target user equipment operation request, sending the target user equipment operation response to the monitoring system.

The step B further includes: after receiving the monitoring parameter operation request, the serving mobile switching center to which the target user equipment belongs sends a monitoring parameter operation response to the attribution information storage.

The step B further includes: after the short message center receives the monitoring parameter operation request, it sends a monitoring parameter operation response to the attribution information storage.

The step A is that the monitoring system sends a target user equipment setting request to the attribution information storage, the target user equipment setting request carries the target user equipment identification and the corresponding monitoring parameters, and the attribution information storage stores the monitoring parameters of the target user equipment ; The step B is that the attribution information store sends a monitoring parameter setting request to the short message center and the serving mobile switching center to which the target user equipment belongs, and the monitoring parameter setting request carries the target user equipment identification and corresponding monitoring parameters, The short message center and the serving mobile switching center store interception parameters corresponding to the target user equipment.

The step A is that the monitoring system sends a target user equipment update request to the attribution information storage, the target user equipment update request carries the target user equipment identification and the current monitoring parameters corresponding to it, and the attribution information storage stores the current monitoring parameters of the target user equipment ; The step B is that the attribution information storage device sends a monitoring parameter update request to the short message center and the serving mobile switching center to which the target user equipment belongs, and the monitoring parameter updating request carries the target user equipment identification and the current monitoring parameter corresponding to it, and the short message The center and the serving mobile switching center to which the target user equipment belongs store the current listening parameters corresponding to the target user equipment.

The step A is that the monitoring system sends a target user equipment cancel request to the attribution information storage, the target user equipment cancellation request carries the target user equipment identifier, and the attribution information storage deletes the monitoring parameters corresponding to the target user equipment; the step B is The attribution information store sends an interception parameter cancellation request to the short message center and the serving mobile switching center to which the target user equipment belongs. Monitoring parameters corresponding to the target user equipment.

The step B is: the attribution information storage device sends a interception parameter cancellation request carrying the identity of the target UE to the serving MSC to which the target UE belongs before the move, and the serving MSC deletes the interception parameters corresponding to the identity of the target UE.

The mobile switching center is connected to the monitoring system through an X2 interface for reporting events related to communication activities of the target user equipment and an X3 interface for reporting communication content of the target user equipment.

The short message center is connected to the monitoring system through the X2 interface for reporting the communication content of the target user equipment.

The target user equipment operation response is a target user equipment setting response; or a target user equipment update response; or a target user equipment cancel response.

The monitor parameter operation response is a monitor parameter setting response; or a monitor parameter update response; or a monitor parameter cancel response.

According to the method proposed by the present invention, the monitoring system only needs to perform one target user equipment setting operation, that is, the monitoring system only needs to interact with the information in the attribution information storage to complete setting the target user equipment and updating the monitoring corresponding to the target user equipment. parameters, cancel the setting of the target user equipment, and then pass the monitoring parameters through the information interaction between the attribution information storage and the serving mobile switching center and the short message center, so as to realize the communication activities of the serving mobile switching center and the short message center to the target user equipment monitoring, reducing the complexity of the monitoring parameter update process. According to the method proposed by the invention, other mobile switching centers except the serving mobile switching center no longer store a large amount of redundant information, and the redundant information in the original serving mobile switching center can be cleared. Because in the present invention, no signaling interaction needs to be carried out between the listening system and the mobile switching center and the short message center, so the X interface between the listening system and the mobile switching center and the short message center can be simplified accordingly, and there is no X1 interface.

Description of drawings

Fig. 1 is a schematic diagram of the relationship between the monitoring system and the mobile communication network;

Fig. 2 is a schematic diagram of the monitoring interface between the monitoring system and the mobile communication network;

Fig. 3 is a schematic diagram of the monitoring interface structure between the monitoring system and the MSC;

Fig. 4 is the monitoring interface structural representation between monitoring system and HLR/SMC;

FIG. 5 is a schematic diagram of monitoring when a target user equipment moves between MSCs;

FIG. 6 is a schematic diagram of a solution for realizing monitoring in the present invention;

Fig. 7 is a schematic diagram of the monitoring interface structure between the monitoring system and the MSC in the present invention;

Fig. 8 is a schematic diagram of the monitoring interface structure between the monitoring system and the SMC in the present invention;

FIG. 9 is a flow chart of setting a target user equipment in the present invention;

Fig. 10 is a flow chart of updating monitoring parameters in the present invention;

FIG. 11 is a flow chart of canceling the setting of the target user equipment in the present invention;

FIG. 12 is a flowchart of processing when the target user equipment is turned on in the present invention;

Fig. 13 is a flow chart of the target user equipment moving between MSCs in the present invention.

Detailed ways

In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

The method proposed by the present invention is: the monitoring system only sets the target user equipment in the attribution information storage, stores the monitoring parameters of the target user equipment in the attribution information storage, and sends the monitoring parameters of the target user equipment to the SMC and the target user equipment to which the target user equipment belongs. Serve the mobile switching center; when the monitoring parameters of the target user equipment change, the monitoring system sends the updated current monitoring parameters to the attribution information storage, and the attribution information storage stores the current monitoring parameters of the target user equipment, and stores the current monitoring parameters of the target user equipment The parameters are sent to the SMC and the serving mobile switching center to which the target user equipment belongs; when the monitoring system does not need to monitor the communication activities of the target user equipment, the monitoring system sends a request message for canceling the monitoring to the attribution information storage, and the attribution information storage deletes the connection with the target user equipment. The monitoring parameters corresponding to the user equipment, and send a message of canceling the monitoring parameters to the SMC and the serving mobile switching center to which the target user equipment belongs; when the monitoring system sets the target user equipment in the attribution information storage, if the target user is in the shutdown state, When the target user equipment is turned on and registered, the attribution information storage device sends the current monitoring parameters of the target user equipment to the serving mobile switching center to which the target user equipment belongs; if the target user equipment changes the serving mobile switching center due to location changes, when When the target user equipment performs location registration in the home information storage through the current serving MSC, the home information storage sends the current monitoring parameters of the target UE to the serving MSC to which the target UE currently belongs.

As mentioned above, in the GSM communication system and the CDMA communication system, the equipment required to provide the monitoring access function includes HLR, MSC and SMC. In addition, in the future W-CDMA communication system, the equipment required to provide the monitoring access function includes: Home Subscriber Server (HSS, Home Subscriber Server), MSC and SMC. It can be seen that the attribution information storage is HLR in the GSM communication system and CDMA communication system, and is HSS in the W-CDMA communication system; the mobile switching center is MSC in the GSM communication system and CDMA communication system, and the Also for MSC. In the following, the implementation process of the present invention will be further described in detail by taking the CDMA communication system as an example.

Fig. 6 realizes the scheme synoptic diagram of monitoring in the present invention, as shown in Figure 6, monitoring system 102 sends to HLR 203 the monitoring parameter corresponding to target user equipment, and then HLR 203 sends to MSC202 and SMC 204 respectively and the corresponding monitoring parameter of target user equipment Corresponding monitoring parameters, MSC 202 and SMC 204 monitor the communication activities of the target user equipment according to the received monitoring parameters.

Since the MSC and the SMC do not need to perform signaling interaction with the monitoring system in the present invention, the present invention accordingly simplifies the X interface connecting the monitoring system and the MSC, and connecting the monitoring system and the SMC.

Fig. 7 is the monitoring interface structure schematic diagram between monitoring system and MSC in the present invention, as shown in Figure 7, the X interface between monitoring system 102 and MSC 202 comprises service interface X2 and X3. The MSC 202 reports the communication activity-related event of the target user equipment to the monitoring system 102 through the X2 interface; the MSC

202 Report the communication content of the target user equipment, such as call voice, to the monitoring system through the X3 interface.

Fig. 8 is the monitoring interface structure schematic diagram between monitoring system and SMC among the present invention, as shown in Figure 8, the X interface between monitoring system 102 and SMC 204 is service interface X2, and SMC 204 reports target user to monitoring system 102 by X2 interface Short message events and short messages of the device.

FIG. 9 is a flow chart of the process of setting the target user equipment in the present invention. As shown in FIG. 9, the process of setting the target user equipment includes the following steps:

Steps A1 to A2: The monitoring system sends a target user equipment setting request to the HLR, the target user equipment setting request carries the target user equipment identification and corresponding monitoring parameters to be set; the HLR receives the target user equipment setting request Afterwards, the monitoring parameters corresponding to setting the target user equipment are stored, and then a target user equipment setting response is sent to the monitoring system to notify the monitoring system that the target user equipment setting operation has been performed.

Steps A3 to A4: HLR sends a monitoring parameter setting request to the SMC, the monitoring parameter setting request carries the target user equipment identifier and corresponding monitoring parameters; after receiving the monitoring parameter setting request, the SMC stores the information corresponding to the target user equipment monitoring parameters, and send a monitoring parameter setting response to the HLR, and then monitor the communication activities of the corresponding target user equipment according to the monitoring parameters. When the target user equipment receives/sends a short message, the SMC reports the short message event and short message to the monitoring system information.

Steps A5 to A6: If the target user equipment is in the power-on state, the HLR sends a monitoring parameter setting request to the serving MSC, and the monitoring parameter setting request carries the target user equipment identifier and corresponding monitoring parameters; the serving MSC receives the monitoring parameter setting After the request, store the monitoring parameters corresponding to the target user equipment, and send a monitoring parameter setting response to the HLR, and then monitor the communication activities of the corresponding target user equipment according to the monitoring parameters. When the target user equipment has communication activities, the MSC sends The monitoring system reports events related to communication activities and communication content. If the target user equipment is powered off, steps A5 to A6 are omitted.

Fig. 10 is a flow chart of updating the monitoring parameters in the present invention. As shown in Fig. 10, the process of updating the monitoring parameters includes the following steps:

Steps B1 to B2: The monitoring system sends a target user equipment update request to the HLR, the target user equipment update request carries the target user equipment identification and the corresponding current monitoring parameters that need to update the monitoring parameters; after the HLR receives the target user equipment update request , storing the current monitoring parameters corresponding to the target user equipment, and then sending a target user equipment update response to the monitoring system, notifying the monitoring system that the monitoring parameter update operation has been performed.

Steps B3 to B4: HLR sends a monitoring parameter update request to the SMC, which carries the target user equipment identifier and the updated current monitoring parameters; after receiving the monitoring parameter update request, the SMC deletes the information corresponding to the target user equipment. The original monitoring parameters of the target user equipment are stored, and the current monitoring parameters corresponding to the target user equipment are stored, and the monitoring parameter update response is sent to the HLR, and then the communication activities of the corresponding target user equipment are monitored according to the current monitoring parameters. When the target user receives/sends a short message , the SMC reports the short message event and the short message to the monitoring system.

Steps B5 to B6: If the target user equipment is powered on, the HLR sends a monitoring parameter update request to the serving MSC, which carries the target user equipment identifier and the updated current monitoring parameters; the serving MSC receives the monitoring parameter update After the request, delete the original monitoring parameters corresponding to the target user equipment, store the current monitoring parameters corresponding to the target user equipment, and send a monitoring parameter update response to the HLR, and then perform communication activities of the corresponding target user equipment according to the current monitoring parameters Monitoring, when the target user has communication activities, the MSC reports communication activities related events and communication content to the monitoring system. If the target user equipment is powered off, steps B5 to B6 are omitted.

Fig. 11 is a flow chart of canceling the setting of the target user equipment in the present invention. As shown in Fig. 11, the process of canceling the setting of the target user equipment includes the following steps:

Step C1～Step C2: The monitoring system sends a target user equipment cancellation request to the HLR, the target user equipment cancellation request carries the target user equipment identification, and notifies the HLR to cancel the monitoring of the target user equipment communication activities; HLR receives the target user equipment cancellation request Finally, delete the monitoring parameter corresponding to the target user equipment, and then send a target user equipment cancellation response to the monitoring system, notifying the monitoring system that the monitoring parameter deletion operation has been performed.

Steps C3 to C4: the HLR sends a monitoring parameter cancellation request to the SMC, and the monitoring parameter cancellation request carries the target user equipment identifier; after the SMC receives the monitoring parameter cancellation request, it deletes the monitoring parameter corresponding to the target user equipment stored in itself, And send a monitoring parameter cancellation response to the HLR, and stop monitoring the communication activities of the corresponding target user equipment.

Steps C5 to C6: If the target user equipment is in the power-on state, the HLR sends a monitoring parameter cancellation request to the serving MSC, and the monitoring parameter cancellation request carries the target user equipment identifier; after receiving the monitoring parameter cancellation request, the serving MSC deletes the information stored by itself. The monitoring parameter corresponding to the target user equipment is sent to the HLR to cancel the monitoring parameter response, and the monitoring of the communication activity of the corresponding target user equipment is stopped. If the target user equipment is powered off, steps C5 to C6 are omitted.

When the target user equipment is turned off, when the monitoring system sets the target user equipment in the HLR, or when the monitoring system notifies the HLR to update the monitoring parameters of the set target user equipment, the HLR cannot search for the MSC where the target user equipment is located. That is, the serving MSC, when the target user equipment is turned on, the HLR actively sends a monitoring parameter setting request to the serving MSC after completing the location registration of the target user equipment. When the serving MSC of the target user equipment changes, the HLR actively sends a monitoring parameter setting request to the current serving MSC of the target user equipment after completing the location registration of the target user equipment.

Fig. 12 is a flowchart of processing when the target user equipment is turned on in the present invention. As shown in Fig. 12, the processing process when the target user equipment is turned on specifically includes the following steps:

Because before the target user equipment is turned on, the target user equipment may be set in the HLR for the monitoring system, and the monitoring parameters of the target user equipment may be updated for the monitoring system, so steps D1 to D2 can be divided into a and b two cases:

Step D1a to step D2a are the same as step A1 to step A2.

Step D1b to step D2b are the same as step B1 to step B2.

Steps D3 to D4: the target user equipment is turned on, and the target user equipment performs location registration in the HLR through the serving MSC. After the location registration process is completed, the HLR judges whether the current location registration user equipment is the target user equipment set by the monitoring system, If yes, execute step D5; otherwise, the HLR does not perform subsequent processing.

Step D5 - Step D6 are the same as Step A5 - Step A6.

Figure 13 is a flow chart of the process of moving the target user equipment between MSCs in the present invention. As shown in Figure 13, the process of moving the target user equipment between MSCs can be divided into two cases, a and b, specifically including the following steps:

Because before the target user equipment moves, it is possible to set the target user equipment in the HLR for the monitoring system, and it is also possible to update the monitoring parameters of the target user equipment for the monitoring system, so steps E1 to E4 can be divided into a and b two cases:

Step E1a to step E2a are the same as step A1 to step A2.

Step E1b to step E2b are the same as step B1 to step B2.

Step E3a to step E4a are the same as step A5 to step A6.

Step E3b to step E4b are the same as step B5 to step B6.

Step E5～Step E6: The target user equipment moves from MSC1 to MSC2, the serving MSC changes from MSC1 to MSC2, and MSC2 is the current serving MSC, and the target user equipment performs location registration in the HLR through MSC2. After the location registration process ends, the HLR judges the current Whether the user equipment performing location registration is the target user equipment set by the monitoring system, if yes, execute step E7; otherwise, the HLR does not perform subsequent processing.

Step E7 - Step E8 are basically the same as Step A5 - Step A6.

Steps E9 to E10: HLR sends a monitoring parameter cancellation request to MSC1, and the monitoring parameter cancellation request carries the target user equipment identifier; MSC1 deletes the monitoring parameter corresponding to the target user equipment stored by itself after receiving the monitoring parameter cancellation request, And send monitoring parameter cancellation response to HLR. Step E9 to step E10 can be performed simultaneously with step E7 to step E8. The current serving MSC of the target user equipment is MSC2, and MSC1 as the original serving MSC also stores monitoring parameters corresponding to the target user equipment, and the redundant information of MSC1 can be cleared through steps E9 and E10. It can be seen that the purpose of the above two steps is to clear the redundant information in the original serving MSC where the target user equipment is located, that is, MSCs other than the current serving MSC, and delete the information corresponding to the target user equipment stored in the original serving MSC. Monitor parameters. Step E9 to step E10 can be omitted.

Not every position registration of the serving MSC in the HLR will cause the HLR to send a monitoring parameter setting request or a monitoring parameter update request to the serving MSC, such as power-off position registration, and a timing position registration in which the serving MSC does not change. For the timed location registration where the serving MSC has not changed, the HLR should ensure that the same serving MSC only updates the latest current monitoring parameters once, so as to reduce the number of information interactions and save system resources. For example, the HLR has sent the latest monitoring parameters to the serving MSC , when serving MSC carries out timing position registration in HLR, HLR finds that the serving MSC of target user equipment has not changed, and has sent the latest monitoring parameter to this serving MSC, so HLR no longer sends monitoring parameters to this serving MSC.

In order to ensure that only the serving MSC stores the monitoring parameters corresponding to the target user equipment, and avoid the monitoring parameters from being dropped in the serving MSC, that is, the monitoring parameters are not cleared in the non-serving MSC, for example, the target user equipment is powered off in the serving MSC1 , and then the monitoring system cancels the monitoring. At this time, because the target user equipment has been shut down, HLR will not notify MSC1 to delete the monitoring parameters corresponding to the target user equipment; then, the target user equipment moves to MSC2 and starts up, because there is no The relevant monitoring parameters of the target user equipment, so MSC1 will not be notified to delete the monitoring parameters corresponding to the target user equipment, then the monitoring parameters of the target user equipment will be stored in MSC1 forever; if the target user equipment moves to MSC1 , the monitoring system does not need to monitor the communication activities of the target user equipment at this time, but because the monitoring parameters corresponding to the target user equipment are still stored in MSC1, the target user equipment will still be monitored by MSC1. Therefore, require: 1) when the target user equipment is turned off and registered, the serving MSC to which the target user equipment belongs automatically deletes the monitoring parameters corresponding to the target user equipment when the target user equipment is turned off; 2) MSC should regularly check the consistency of the target user equipment with the HLR , for example, once a week, for those target user equipments that are no longer monitored by the HLR, the MSC will delete the monitoring parameters of these target user equipments.

The above-mentioned target user equipment setting request, target user equipment update request and target user equipment cancellation request can be defined separately, or all can be carried by the target user equipment operation request. Parameters to distinguish the specific operation requested; correspondingly, the target user equipment setting response, target user equipment update response and target user equipment cancellation response can be defined separately, or all can be carried by the target user equipment operation response.

The monitoring parameter setting request, monitoring parameter update request and monitoring parameter cancellation request mentioned above can be defined separately, or they can all be carried by the monitoring parameter operation request. By carrying different parameters in the monitoring parameter operation request, the monitoring Specific operations performed on parameters, for example, by carrying the cancel flag in the monitoring parameter operation request, it indicates that the monitoring parameter needs to be canceled; correspondingly, the monitoring parameter setting response, monitoring parameter update response and monitoring parameter cancellation response can be separately can be defined, and can also be carried by the monitoring parameter operation response.

In the present invention, the monitoring system and the HLR carry out information interaction through the monitoring interface, and the definition of the interactive information can refer to the prior art standard; Define accordingly.

Table 1 is the parameters and descriptions carried in the monitoring parameter setting request sent by HLR to MSC; Table 2 is the parameter and description carried in the monitoring parameter setting request sent by HLR to SMC; Table 3 is the information sent by MSC or SMC to HLR The parameters and descriptions carried in the monitoring parameter setting response sent; Table 4 is the parameters and descriptions carried in the monitoring parameter cancellation request sent by HLR to MSC; Table 5 The parameters carried in the monitoring parameter cancellation request sent by HLR to SMC and its description; Table 6 is the parameters and descriptions carried in the monitoring parameter operation request sent by HLR to MSC; Table 7 is the parameter and its description carried in the monitoring parameter operation request sent by HLR to SMC; Table 8 is MSC or SMC Parameters and their descriptions carried in the monitoring parameter operation response sent to the HLR. Among them, M is a mandatory parameter, and O is an optional parameter. Since the monitoring parameter update request sent by the HLR to the MSC is basically the same as the parameter and description carried in the monitoring parameter setting request, the monitoring parameter updating request sent by the HLR to the SMC is basically the same as the parameter and description carried in the monitoring parameter setting request. Or the monitoring parameter update response and monitoring parameter cancel response sent by the SMC to the HLR are basically the same as the parameters and their descriptions carried in the monitoring parameter setting response, so no additional table is required for description.

parameter type note message type m Identify the type of message: listen for parameter setting requests Target User Device Identity Type m Target user equipment identification types include: Mobile Directory (MDN), International Mobile Subscriber Identity (IMSI), Electronic Serial Number (ESN), Integrated Services Network Identity (ISDN), etc. target user device identification m The specific identification of the target user equipment, for example, the identification type of the target user equipment is MDN, and the target user equipment identification is the mobile number of the target user equipment. Monitoring business type o Indicate which services of the target user equipment are monitored. The services that can be monitored include: voice service, fax service, asynchronous data service, short message service, supplementary service, etc. Monitoring and reporting method o 1—Only report the communication activity-related events of the target user equipment 2—Only report the communication content of the target user equipment 3—Report the communication activity-related events and content of the target user equipment at the same time X3 interface output mode o Indicates whether the voice output from the MSC to the monitoring system is a combination of sending and receiving, or separate sending and receiving A or B. Event reporting address in the monitoring system o In the monitoring system, the address of the device that receives the event related to the communication activity of the target user equipment reported by the MSC. Voice reporting address in the monitoring system o In the monitoring system, the device address of the call voice of the target user equipment reported by the MSC is received. Monitor terminal number o It is necessary to output the call content of the target user equipment to the specified terminal

the list (Mobile terminal or fixed terminal), specify the number of the corresponding terminal. Can output to several terminals at the same time.

Table 1 Monitoring parameter setting request (HLR-MSC)

Note: In the interception parameter update request sent by HLR to MSC, only the type of the identification message is interception parameter update request is different from Table 1, and the remaining parameters and descriptions carried are basically the same.

parameter type note message type m Identify the type of message: listen for parameter setting requests Target User Device Identity Type m Target user equipment identification types include: Mobile Directory (MDN), International Mobile Subscriber Identity (IMSI), Electronic Serial Number (ESN), Integrated Services Network Identity (ISDN), etc. target user device identification m The specific identification of the target user equipment, for example, the identification type of the target user equipment is MDN, and the target user equipment identification is the mobile number of the target user equipment. Event reporting address in the monitoring system o In the monitoring system, the address of the device that receives the event related to the communication activity of the target user equipment reported by the SMC.

Table 2 Monitoring parameter setting request (HLR-SMC)

Note: In the monitor parameter update request sent by the HLR to the SMC, only the type of the identification message is the monitor parameter update request is different from Table 2, and the other carried parameters and descriptions are basically the same.

parameter type note message type m Identify the type of message: listen for parameter setting responses Target User Device Identity Type m Target user equipment identification types include: Mobile Directory (MDN), International Mobile Subscriber Identity (IMSI), Electronic Serial Number (ESN), Integrated Services Network Identity (ISDN), etc.

target user device identification m The specific identification of the target user equipment, for example, the identification type of the target user equipment is MDN, and the target user equipment identification is the mobile number of the target user equipment. Results of the m Indicates whether the monitoring parameter setting operation in MSC/SMC is successful. error code o If the execution result parameter indicates that the operation failed, the error code indicates the reason for the failure.

Table 3 Monitoring parameter setting response (MSC-HLR or SMC-HLR)

Note: In the interception parameter update response sent by MSC to HLR or SMC to HLR, only the type of identification message is interception parameter update response is different from Table 3, and the other carried parameters and descriptions are basically the same.

parameter type note message type m Identify the type of message: listen parameter cancel request Target User Device Identity Type m Target user equipment identification types include: Mobile Directory (MDN), International Mobile Subscriber Identity (IMSI), Electronic Serial Number (ESN), Integrated Services Network Identity (ISDN), etc. target user device identification m The specific identification of the target user equipment, for example, the identification type of the target user equipment is MDN, and the target user equipment identification is the mobile number of the target user equipment

Table 4 Monitoring parameter cancellation request (HLR-MSC)

parameter type note message type m Identify the type of message: listen parameter cancel request Target User Device Identity Type m Target user equipment identification types include: Mobile Directory (MDN), International Mobile Subscriber Identity (IMSI), Electronic Serial Number (ESN), Integrated Services Network Identity (ISDN), etc.

target user device identification m The specific identification of the target user equipment, for example, the identification type of the target user equipment is MDN, and the target user equipment identification is the mobile number of the target user equipment

Table 5 Monitoring parameter cancellation request (HLR-SMC)

parameter type note message type m Identify the type of message: listen for parameter operation requests notification type m There are 3 types of notifications: Listening parameter setting request—instructs MSC to monitor the target user equipment Listening parameter update request—instructs MSC to update the listening parameters corresponding to the target user equipment Listening parameter cancellation request—instructs MSC to stop communicating with the target user equipment active monitoring Target User Device Identity Type m Target user equipment identification types include: Mobile Directory (MDN), International Mobile Subscriber Identity (IMSI), Electronic Serial Number (ESN), Integrated Services Network Identity (ISDN), etc. target user device identification m The specific identification of the target user equipment, for example, the identification type of the target user equipment is MDN, and the target user equipment identification is the mobile number of the target user equipment Monitoring business type o Indicate which services of the target user equipment are monitored. The services that can be monitored include: voice service, fax service, asynchronous data service, short message service, supplementary service, etc. Monitoring and reporting method o 1—Only report the communication activity-related events of the target user equipment 2—Only report the communication content of the target user equipment 3—Report the communication activity-related events and

content X3 interface output mode o Indicates whether the voice output from the MSC to the monitoring system is a combination of sending and receiving, or separate sending and receiving A or B. Event reporting address in the monitoring system o In the monitoring system, the address of the device that receives the event related to the communication activity of the target user equipment reported by the MSC. Voice reporting address in the monitoring system o In the monitoring system, the device address of the call voice of the target user equipment reported by the MSC is received. Listening terminal number list o When it is necessary to output the call content of the target user equipment to a designated terminal (mobile terminal or fixed terminal), the number of the corresponding terminal specified. Can output to several terminals at the same time.

Table 6 Monitoring parameter operation request (HLR-MSC)

parameter type note message type m Identify the type of message: listen for parameter operation requests notification type m Monitor parameter setting request—instruct SMC to monitor the target user equipment Monitor parameter update request—instruct SMC to update the monitor parameters corresponding to the target user equipment Monitor parameter cancel request—instruct SMC to stop monitoring the communication activities of the target user equipment Target User Device Identity Type m Target user equipment identification types include: Mobile Directory (MDN), International Mobile Subscriber Identity (IMSI), Electronic Serial Number (ESN), Integrated Services Network Identity (ISDN), etc.

target user device identification m The specific identification of the target user equipment, for example, the identification type of the target user equipment is MDN, and the target user equipment identification is the mobile number of the target user equipment Event reporting address in the monitoring system o In the monitoring system, the address of the device that receives the event related to the communication activity of the target user equipment reported by the SMC.

Table 7 Monitoring parameter operation request (HLR-SMC)

parameter type note message type m Identify the type of message: monitor parameter operation response notification type m The value of this parameter must be consistent with the value of this parameter in Table 6 or Table 7 Target User Device Identity Type m Target user equipment identification types include: Mobile Directory (MDN), International Mobile Subscriber Identity (IMSI), Electronic Serial Number (ESN), Integrated Services Network Identity (ISDN), etc. target user device identification m The specific value of the target user equipment identifier, for example, the type of the target user equipment identifier is MDN, and the target user equipment identifier is the mobile number of the target user equipment (refer to the previous table for modification) Results of the m Indicates whether the operation performed according to the monitoring parameter operation request is successful error code o If the execution result parameter indicates that the operation failed, the error code indicates the reason for the failure.

Table 8 Surveillance parameter operation response (MSC-HLR or SMC-HLR)

In a word, the above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention.

Claims (18)

1. A method for realizing legal interception, characterized in that the method comprises the following steps: A. The monitoring system sends a target user equipment operation request to the attribution information storage, the target user equipment operation request carries the target user equipment identifier and corresponding monitoring parameters, and the attribution information storage records the monitoring parameters of the target user equipment; B. The attribution information store sends a monitoring parameter operation request to the short message center and the serving mobile switching center to which the target user equipment belongs. The monitoring parameter operation request carries the identification of the target user equipment and the corresponding monitoring parameters. The switching center records the monitoring parameters corresponding to the target user equipment; C. The short message center and the serving mobile switching center to which the target user equipment belongs judge whether it is necessary to monitor the communication activities of the target user equipment according to the monitoring parameters, and if so, the short message center and the serving mobile switching center according to the monitoring parameters Monitor the communication activities of the target user equipment, and report the communication activities related events and communication content to the monitoring system, otherwise, the short message center and the serving mobile switching center will not monitor the communication activities of the target user equipment. 2. The method according to claim 1, characterized in that said step B further comprises: B1, the attribution information storage device first determines whether the target user equipment is in a power-on state before sending the monitoring parameter operation request, and if so, the attribution information storage unit sends a monitoring parameter operation request to the short message center and the serving mobile switching center to which the target user equipment belongs; otherwise , execute step B2; B2. The attribution information storage only sends the monitoring parameter operation request to the short message center. 3. The method according to claim 2, wherein the step B2 further comprises: when the target user equipment is turned on, the attribution information storage device sends the target user equipment identifier and For the monitoring parameter operation request corresponding to the monitoring parameter, the serving mobile switching center records the monitoring parameter corresponding to the target user equipment. 4. The method according to claim 1, wherein when the serving mobile switching center to which the target user equipment belongs changes, the step B is: the attribution information storage sends the information to the serving mobile switching center to which the target user equipment belongs An interception parameter operation request, the interception parameter operation request carries the identifier of the target user equipment and the corresponding interception parameters, and the serving mobile switching center stores the interception parameters corresponding to the target user equipment. 5. The method according to claim 3 or 4, characterized in that said step B further comprises: after the target user equipment performs location registration in the home information storage through the serving mobile switching center to which it belongs, the home information storage judges that the current location registration is performed Whether the user equipment is the target user equipment set by the monitoring system and needs to monitor its communication activities, if so, send a monitoring parameter operation request to the serving mobile switching center to which the target user equipment belongs; otherwise, no follow-up processing is performed. 6. The method according to claim 4, characterized in that said step B further comprises: the attribution information store sends a monitoring parameter operation request carrying the identity of the target user equipment to the serving mobile switching center to which the target user equipment belongs before moving, the The serving MSC deletes the listening parameters corresponding to the target user equipment. 7. The method according to claim 1, wherein the step B further comprises: when the target user equipment is powered off, the serving mobile switching center to which the target user equipment belongs automatically deletes the monitoring parameters corresponding to the target user equipment . 8. The method according to claim 1, wherein the step A further comprises: after the attribution information store receives the target user equipment operation request, sending the target user equipment operation response to the monitoring system. 9. The method according to claim 1, characterized in that the step B further comprises: after the serving mobile switching center to which the target user equipment belongs receives the interception parameter operation request, sends an interception parameter operation response to the attribution information storage. 10. The method according to claim 1, characterized in that said step B further comprises: after receiving the monitoring parameter operation request, the short message center sends a monitoring parameter operation response to the attribution information storage. 11. The method of claim 1, wherein: The step A is that the monitoring system sends a target user equipment setting request to the attribution information storage, the target user equipment setting request carries the target user equipment identification and the corresponding monitoring parameters, and the attribution information storage stores the monitoring parameters of the target user equipment ; Said step B is that the attribution information store sends a monitoring parameter setting request to the short message center and the serving mobile switching center to which the target user equipment belongs, and the monitoring parameter setting request carries the target user equipment identification and corresponding monitoring parameters, and the short message The message center and the serving mobile switching center store interception parameters corresponding to the target user equipment. 12. The method of claim 1, wherein: The step A is that the monitoring system sends a target user equipment update request to the attribution information storage, the target user equipment update request carries the target user equipment identification and the current monitoring parameters corresponding to it, and the attribution information storage stores the current monitoring parameters of the target user equipment ; Said step B is that the attribution information store sends a monitoring parameter update request to the short message center and the serving mobile switching center to which the target user equipment belongs, and the monitoring parameter update request carries the target user equipment identification and the current monitoring parameter corresponding to it, and the short message center The serving mobile switching center to which the target user equipment belongs stores the current monitoring parameters corresponding to the target user equipment. 13. The method of claim 1, wherein: The step A is that the monitoring system sends a target user equipment cancel request to the attribution information storage, the target user equipment cancellation request carries the target user equipment identifier, and the attribution information storage deletes the monitoring parameters corresponding to the target user equipment; Said step B is that the attribution information store sends a monitoring parameter cancellation request to the short message center and the serving mobile switching center to which the target user equipment belongs, and the monitoring parameter cancellation request carries the target user equipment identifier, the short message center and the service to which the target user equipment belongs The mobile switching center deletes the monitoring parameters corresponding to the target user equipment. 14. The method according to claim 6, characterized in that the step B is: the attribution information store sends a interception parameter cancellation request carrying the identification of the target user equipment to the serving mobile switching center to which the target user equipment belongs before the move, and the service The mobile switching center deletes the listening parameter corresponding to the target user equipment identifier. 15. The method according to claim 1, wherein the mobile switching center is connected to the monitoring system through an X2 interface for reporting events related to communication activities of the target user equipment and an X3 interface for reporting communication content of the target user equipment. 16. The method according to claim 1, characterized in that: the short message center is connected to the monitoring system through the X2 interface for reporting the communication content of the target user equipment. 17. The method according to claim 8, characterized in that: the target user equipment operation response is a target user equipment setting response; or a target user equipment update response; or a target user equipment cancel response. 18. The method according to claim 9 or 10, characterized in that: the monitor parameter operation response is a monitor parameter setting response; or a monitor parameter update response; or a monitor parameter cancel response.

Images