CN1486095A - Method for monitoring users in mobile communication system - Google Patents

Abstract

The invention discloses a method for monitoring users in a mobile communication system. When a user has a business activity, the system queries the controlled data in the controlled user database. If the controlled user database has the controlled data of the user, then Determine that the user is the controlled user set by the monitoring center, send the result of the query to the switch, and the monitoring center connected to the switch monitors the user. It is characterized in that the process of the system to the controlled user database query includes the following steps: 1) In the visitor location register, set up the controlled user database comprising the monitoring number table and the monitoring record table, and index the monitoring number table to the monitoring record table according to the monitoring number; 2) query the controlled user from the monitoring number table to the monitoring record table Control all the records of the user, and return all the queried information to the switch. The method of the invention does not change the call processing flow, reduces the data query time of the controlled user, improves the communication quality, and is not easy to be noticed by the user.

Description

Method for monitoring users in mobile communication system

technical field

The invention relates to a monitoring technology of a communication system, in particular to a method for monitoring a user in a mobile communication system.

technical background

Due to the constant changes in the international security situation, the governments of various countries have also increased their monitoring of communication security, and have clearly put forward the monitoring requirements for wireless mobile communications. At present, the method for monitoring wireless mobile communication is to set up a monitoring information center, which is connected to the switch in the wireless mobile communication system through a monitoring interface, and conducts real-time tracking and monitoring of any activities of the monitored mobile users within the business scope of the switch. That is to say, once the accused mobile user performs business activities such as power-on, power-off, call, location update, supplementary service operation, etc., the monitoring of this user will be activated immediately, and the monitoring information center can monitor three types of numbers of the same user: mobile station international The identification number (MSISDN), International Mobile Equipment Identity (IMEI), and International Mobile Subscriber Identity (IMSI) are simultaneously tracked and monitored; in addition, the monitoring interface can simultaneously support two or more independent monitoring information centers.

At present, the processing method of monitoring the controlled user is: first, the monitoring information center sets the controlled user to the switch, and the switch saves the record of the controlled user data in the controlled user database; then, when the controlled user makes a call At this time, before processing the call process, the call processing module of the switch first queries the database of the controlled user to determine whether the user is the object to be monitored. If so, the user's activities are tracked and monitored; call flow.

For example, for a user whose MSISDN number is 13901234567, IMSI number is 460005551234567, and IMEI number is 449000001234567, the call processing flow when it is not monitored is shown in Figure 1, and Figure 1 is a flow chart of ordinary call processing. As shown in Figure 1, in the ordinary call processing that does not monitor, at first, step 101 mobile station (user) sends the call setup message (SETUP message) to the mobility management sublayer of mobile switching center (MSC), then, carries out Step 102, this message is sent to the connection management sublayer (CM) of MSC as a direct transfer application part call setup message (DTAP SETUP message), and then in step 103, the CM sends a user data message to the mobile application unit (MAP) to request the calling party data , carry out step 104MAP again and send and get user data message to visitor location register (VLR), after inquiring about user data, return data reply to CM by step 105,106, the data that returns comprises user's MSISDN number, IMSI number and IMEI number etc., Then continue the calling process.

Refer to Figure 2 for the call processing flow when the user is being monitored. As shown in Figure 2, the existing monitoring solution is to add steps 207 and 208 to the original ordinary call processing. Step 207 is to "controlled user database" Inquiry whether the mobile station is the controlled user, step 208 is the operation of returning the query result, it can be seen that the existing method has changed the normal call processing flow. Moreover, when inquiring, the MSISDN, IMSI, and IMEI three numbers in the calling user data returned by the MAP must be queried separately. If there is a record of 13901234567, or 460005551234567, or 449000001234567 in the database of the accused user, it means that the user If the user is monitored, the MSC can perform monitoring related operations on the user at this time.

It can be seen that in the existing method, it is necessary to go through a process of suspending the call processing and querying the database of the charged user, which generally prolongs the connection time of the call and affects the quality of communication. Generally, the number of charged users that a switch can support is not less than 0.5% of the total number of users supported by the switch. In this way, the number of records in the controlled user database in the switch will be very large. If one switch supports 4 monitoring information centers at the same time, and the switch supports a total of 200,000 users, the number of records in the controlled user database will reach 200000*0.5 %*4*3=12000 records. Since the query of the controlled user data is implemented by the exchange during the call connection process, the existing method and process of querying the controlled user database will result in prolonged call connection time. If there are many data in the database and the query algorithm is not suitable, It will seriously affect the call quality and cause complaints from users.

Contents of the invention

In view of this, the main purpose of the present invention is to provide a method for monitoring users in a mobile communication system, so as to reduce the data query time of the controlled user and improve the call quality.

In order to achieve the above object, the technical solution of the present invention is specifically realized in the following way:

A method for monitoring users in a mobile communication system. When a user has a business activity, the system queries the controlled user database for the controlled data. If there is the controlled data of the user in the controlled user database, it is determined that the user is The controlled user set by the monitoring center sends the result of the query to the switch, and the monitoring center connected to the switch monitors the user. It is characterized in that the process of the system to the controlled user database query includes the following steps:

1) In the visitor location register, set up the controlled user database comprising the monitoring number table and the monitoring record table, and the monitoring number table is indexed to the monitoring record table according to the monitoring number;

2) Query all records of the controlled user through the monitoring number table to the monitoring record table, and return all the information found to the exchange.

The method may further include: indexing the basic data of the accused user in the original user basic information table in the visitor location register to the monitoring number table according to the monitoring number. It can be: set a pointer to the first record of the monitoring number of the same user in the monitoring number table for the basic data of each controlled user in the basic user information table.

The method can also further include: setting a hash table for each type of number in the monitoring number table, linking the same type of monitoring numbers with the same hash value to form a two-way chain of the same type of monitoring numbers with the same hash value, each Each monitoring number is indexed to the first monitoring record of the monitoring number in the monitoring record table; and the different types of monitoring numbers of the same user are linked in the monitoring number table to set up a two-way chain of monitoring numbers of the same user; at the same time, the monitoring record table is linked The monitoring records of the same number are linked to set up a two-way monitoring record index chain of the same number, and the chain indexes all monitoring records of the same number.

The step 2) of this method can be: query all types of monitoring numbers of the user by the same user monitoring number chain of the monitoring number table; query the first monitoring record of all types of monitoring numbers in the monitoring record table by all types of monitoring numbers ; Query all monitoring records of all monitoring numbers from the monitoring record index chain where the first record of all types of monitoring numbers is located.

Above-mentioned step 2) can also further comprise: the system inquires user basic data in the original user basic information table in the visitor location register, if the charged user is a local user, then by the basic data of the charged user in the user basic information table according to The monitoring number is indexed to the first monitoring number of the user in the monitoring number table, and the monitoring number chain of the same user is queried; if the charged user is not a local user and there is no basic data of the user in the user basic information table, the Any type of number of the user calculates the hash value of the number through the hash algorithm, and in the monitoring number table, according to the obtained hash value, the corresponding hash table is used to query the two-way monitoring number chain of the same type with the same hash value. When the monitoring number is found, the user's monitoring number chain with the same user can be found from the number.

The above monitoring number table can further link the free space for placing numbers to form a two-way free number chain; the described monitoring record table can further link the free space for placing records to form a two-way free record chain.

The method may further include: when the monitoring information center sets a new monitoring number, the exchange adds a record to the controlled user database in the visitor location register through the interface between the mobile switching center and the visitor location register.

The process of adding a record in the database of the accused user can be as follows: in the monitoring number table, take out an idle node from the idle number chain, add the number to the idle node, and simultaneously make the newly added node the same as its hash value If the monitoring numbers of other users of the same type are linked together, if the monitoring number table already includes the number and other types of monitoring numbers of the user, then the number is linked with them; in the monitoring record table, one is taken from the idle record An idle node, add the record to the idle node, and add the monitoring record to the idle record node at the same time, and link the newly added node with the monitoring record of the same monitoring number.

The process of canceling the monitoring number by the monitoring information center can be as follows: in the monitoring number table, delete the monitoring number in the node where the monitoring number is located and cancel the link relationship between this node and other monitoring numbers, and put the idle node back to the idle number In the chain; in the monitoring record table, delete the monitoring record in the node where the monitoring record is located and cancel the link relationship between the node and other monitoring records, and put the idle node back into the idle record chain.

As can be seen from the above scheme, the key of the present invention is: the controlled user database is arranged in the VLR, the index relationship between the user data and the controlled data is set up in the VLR, and according to the call processing flow, the user information is inquired in the VLR while inquiring The information of the controlled user, when the VLR provides the basic data of the user to the switch, the user's controlled data is brought to the switch together, and the monitoring center connected to the switch monitors the user.

Therefore, the method for monitoring the user in the mobile communication system provided by the present invention does not need to change the call processing flow, reduces the data query time of the controlled user, improves the call quality, and is not easy to be noticed by the user.

Description of drawings

Fig. 1 is a schematic diagram of a common call processing flow;

FIG. 2 is a schematic diagram of a call processing flow of a controlled user in the prior art;

Fig. 3 is the schematic diagram of the data organization mode of user database and controlled user database in the application VLR of the present invention;

FIG. 4 is a schematic diagram of a call processing flow of a controlled user in the embodiment shown in FIG. 3 .

Detailed ways

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

Fig. 3 is a schematic diagram of the data organization mode of the user database and the controlled user database in the VLR of the present invention. As shown in Figure 3, the VLR of the present embodiment includes the original user database and the controlled user database that implements the present invention to set up, wherein, the user basic information table 310 of the user database is indexed to the monitoring number table of the controlled user database 320. Index the monitoring number table to the monitoring record table 330 of the controlled user database.

As shown in Figure 3, what is stored in the monitoring record table 330 is all the monitoring records of the monitoring number set by all monitoring centers, wherein the monitoring records of the same monitoring number are linked into a two-way monitoring record index chain of the same number, including: the same IMSI number The record index chain 8 of the same number, the record index chain 9 of the same MSISDN number, and the record index chain 10 of the same IMEI number, all monitoring records of the same number can be queried by chains 8, 9, and 10, and the monitoring record table will be idle at the same time. The records are linked to be set as a two-way free record chain 331, through which a new record can be inserted or released in the monitoring record table conveniently and quickly through the chain head and the chain tail.

As shown in Figure 3, the monitoring number table saves the numbers of all controlled users set by all monitoring information centers, including International Mobile Subscriber Identity (IMSI), International Mobile Equipment Identity (IMEI) and Mobile Station International Identity Number (MSISDN), where 4 is each monitoring number indexed to the first monitoring record of the monitoring number in the monitoring record table. These three types of numbers are organized in the form of hash (HASH) respectively, and IMSI HASH table 321, MSISDN HASH table 322 and IMEI HASH table 323 are set. Among them, 2 is the first record that each hash table indexes to the monitoring number with the same hash value. The same type of numbers with the same HASH value form a two-way chain of the same type of monitoring number with the same hash value, that is, the IMSI monitoring number chain 5 with the same HASH value, the MSISDN monitoring number chain 6 with the same HASH value, and the IMEI monitoring number with the same HASH value Chain 7. Through chains 5, 6, and 7, all the monitoring numbers of the same type with the same HASH value can be queried; at the same time, different types of numbers of the same user also form a two-way monitoring number chain 3 of the same user, through which the same user's monitoring number can be queried. All monitoring numbers. Idle numbers are linked in the monitoring number table to be set to a two-way idle number chain 324, and a new monitoring number or release monitoring number can be inserted in the monitoring number table conveniently and quickly by the chain head and the chain tail.

As shown in FIG. 3 , the basic user information table 310 stores the user's basic data such as the user's MSISDN number, IMEI number, and IMSI number, wherein 1 indicates that the basic data of the controlled user is indexed to the monitoring number table according to the monitoring number. Indexing can be performed by setting a pointer to the first record of the same user monitoring number chain in the monitoring number table 320 for each piece of controlled user basic data in the basic user information table 310 .

When the monitoring information center sets a new monitoring number, the exchange adds the record to the controlled user database in the visitor location register through the interface between the mobile switching center and the visitor location register.

The process of adding records to the accused user database is: in the monitoring number table 320, take out an idle node from the idle number chain 324, add the number to the idle node, and simultaneously add the new node and its hash value The monitoring numbers of other users of the same type are linked together, if the number has been included in the monitoring number list and other types of monitoring numbers of the user, the number is linked with them; in the monitoring record table 330, from the idle record chain 331 Take out an idle node, add this record to the idle node, and add the monitoring record to the idle record node at the same time, and link the newly added node with the monitoring record of the same monitoring number. Index the new node of the monitoring number table to the first monitoring record of the number in the monitoring record table. If this new monitoring number is the first monitoring number of a local user, a pointer can also be set to the first record of the user's monitoring number chain in the monitoring number table 320 to this user basic data in the basic information table 310.

When the monitoring information center cancels the monitoring number, in the monitoring number table 320, delete the monitoring number in the node where the monitoring number is located and cancel the link relationship between this node and other monitoring numbers, and idle nodes are put back into the idle number chain 324 In the monitoring record table 330, delete the monitoring record in the node where the monitoring record is located and cancel the link relationship between the node and other monitoring records, and put the idle node back into the idle record chain 331. If this monitoring number is the only monitoring number of a local user, the pointer of the user's basic data pointing to the first record of the user's monitoring number chain in the monitoring number table 320 will also be canceled in the basic information table 310.

For example, there is a user whose MSISDN number is 13901234567, IMSI number is 460005551234567, and IMEI number is 449000001234567. Two monitoring centers have set the three numbers of the user as the controlled numbers.

Because two monitoring centers have set the user's three numbers as the controlled numbers, two records with MSISDN number 13901234567 are saved in the monitoring record table, and these two records are linked by a two-way monitoring record index chain It also saves two records with IMSI number 460005551234567, which are linked by another two-way monitoring record index chain, and two records with IMEI number 449000001234567, which are linked by a third two-way monitoring record index chain. The monitoring record index chain is linked.

The monitoring number table contains the 3 numbers of this user, and these 3 numbers form a two-way chain. The three numbers are respectively indexed to the first record of the monitoring record index chain with the MSISDN number 13901234567, the first record of the monitoring record index chain with the IMSI number 460005551234567, and the first record of the monitoring record index chain with the IMEI number 449000001234567 in the monitoring record table.

If this user is a local user, then a pointer is set to point to the first number in these 3 numbers of this user in the monitoring number table to the basic data of this user in the basic information table of the user database of VLR; For a local user, there is no basic data of the user in the basic information table of the user database of the VLR, and the above-mentioned pointer is not set.

The call processing flow of the user is shown in FIG. 4 , which is a schematic diagram of the call processing flow of the controlled user applying the present invention. When this user has occurred service activity, first will go to VLR to inquire user data, at first the call setup message (SETUP message) of step 401 mobile station (user) is sent to the mobility management sublayer of mobile switching center (MSC), then, In step 402, the message is sent to the connection management sublayer (CM) of the MSC as a direct transfer application part call setup message (DTAP SETUP message). Then, in step 403, the CM sends a user data message to the mobile application unit (MAP) to request the calling party data, and step 404MAP sends the user data message to the visitor location register (VLR), then, step 405 queries the basic data of the user and all controlled data of the user from the user database and the controlled user database, and finally steps 406, 407 data The answer is returned to the CM, that is, to the call module of the switch, and the returned data includes the user's basic data and controlled data, and then the call process is continued, and the monitoring center connected to the switch monitors the user. This embodiment supports up to 10 monitoring information centers. Like this, the 3 numbers of each user in the monitoring record table have at most 10 records, a total of 30 records, and each record accounts for 10 bytes, accounting for 300 at most Bytes, and usually only need to support 3-4 monitoring information centers at present, so when using the method of the present invention to bring the user's controlled data to the call module of the switch, it will not bring a lot of overhead to the system.

If the user is a local user, the monitoring number table can be indexed from the basic information table, and the monitoring record index chain in the monitoring record table can be indexed from the monitoring number, so as to query all monitoring records of the user, that is, the controlled data of the user . The specific process is: first judge whether this user data is associated with the data of the controlled user database (MDB) according to the monitoring number index in the basic information table. In this embodiment, when the user is a local user, the monitoring number index points to the monitoring The number table indicates that the user is a charged user. At the same time, from the monitoring number table, the user's MSISDN, IMEI and IMSI three numbers are linked together. It can be clearly known that they are all charged numbers, and according to this The three numbers are respectively indexed into the monitoring record table, the first record of the monitoring record index chain with the MSISDN number 13901234567, the first record of the monitoring record index chain with the IMSI number 460005551234567, and the first record of the monitoring record index chain with the IMEI number 449000001234567 . All 6 records set by the two monitoring information centers for the three different numbers of the user are queried through the 3 record index chains.

If the user is not a local user, there is no basic data of the user in the basic information table. At this time, the monitoring number can be queried through the hash table of different types of data in the monitoring number table, and the monitoring number is indexed into the monitoring record table. The monitoring record index chain, so as to query all the monitoring records of the user. The specific process is: calculate the HASH value with a hash algorithm for any type of number of the user. For example, in this embodiment, the MSISDN number is used to query the monitoring record. According to the number 13901234567, the HASH value is calculated to be 235 through the hash algorithm, and entered in the MSISDN hash table , find the 235th record. According to the record, find the MSISDN monitoring number chain with the same HASH value in the monitoring number table, and compare the number 13901234567 with the number on the chain to find the monitoring number record with the number 13901234567 on the chain. If there is no number on the chain If it is the monitoring number record of 13901234567, it means that the number is not monitored. There are two linked lists on the monitoring number record, and one linked list is linked to the first record of the two monitoring record index chains of the monitoring number in the monitoring record table, so as to query the two monitoring records of the monitoring number. Another two-way monitoring number chain of the same user can find the user’s monitoring number and IMEI monitoring number in the monitoring record table, and can find the IMSI and IMEI in the monitoring record table through the chain in the IMSI monitoring number and IMEI monitoring number. Each of the two monitoring records. The method of using IMSI number and IMEI number to query monitoring records is the same as that of using MSISDN number, except that the calculated hash values are different. The query method of querying records through the HASH table is a relatively efficient query method at present, so there will be no long delay at this time.

As can be seen from Fig. 4, when the present invention is applied, there is no difference in flow with the common call, only when the VLR is inquiring about the user's basic data, it queries the database of the controlled user, and in the returned user data response message, the controlled user The data and the user's basic data are brought to the call processing module of the switch, so as to monitor and track the user, so that the connection time will not be prolonged and the call quality will not be affected, and it will not be easily noticed by the user.

It can be seen that the method for activating the monitoring of the controlled user in the mobile communication system provided by the present invention is to integrate the controlled user database with the original user database of the VLR, so that the user can be fetched in the user database of the VLR during call processing. When the data is collected, the database of the controlled user is automatically queried, and the monitoring data of the controlled user is brought back to the call processing module of the switch in the user data to activate the monitoring of the controlled user. In this way, the user database and the controlled user database are integrated, and the process of querying the controlled user database is unified with the original process of obtaining user data, which reduces the process of separately querying the controlled user database and does not affect the original call processing process at all. And do not change the connection time at all. It solves the problem in the prior art that the connection time is extended due to the need to query the database of the charged user, improves the quality of the conversation, and is not easy to be noticed by the user.

Claims (10)

1. A method for monitoring users in a mobile communication system. When a user has a business activity, the system queries the controlled user database for the controlled data. If there is the controlled data of the user in the controlled user database, it determines the The user is the controlled user set by the monitoring center, and the result of the query is sent to the switch, and the monitoring center connected to the switch monitors the user. It is characterized in that the process of the system to the controlled user database query includes the following steps: 1) In the visitor location register, set up the controlled user database comprising the monitoring number table and the monitoring record table, and the monitoring number table is indexed to the monitoring record table according to the monitoring number; 2) Query all records of the controlled user through the monitoring number table to the monitoring record table, and return all the information found to the exchange. 2. The method according to claim 1, further comprising: indexing the basic data of the accused user in the original user basic information table in the visitor location register to the monitoring number table according to the monitoring number. 3. The method according to claim 2, wherein said indexing the basic data of the controlled user to the monitoring number table is: setting a pointer to the basic data of each controlled user in the user basic information table The first record of the monitoring number of the same user in the monitoring number table. 4. The method according to claim 1 or 2, further comprising: setting a hash table for each type of number in the monitoring number table, and linking the same type of monitoring number with the hash value to set A two-way monitoring number chain of the same type with the same hash value, each monitoring number is indexed to the first monitoring record of the monitoring number in the monitoring record table; Two-way monitoring number chain of the same user; at the same time, the monitoring records of the same number in the monitoring record table are linked to set up a two-way monitoring record index chain of the same number, and the chain indexes all monitoring records of the same number. 5. The method according to claim 4, characterized in that step 2) of the method is: querying all types of monitoring numbers of the user through the same user monitoring number chain in the monitoring number list; querying by all types of monitoring numbers The first monitoring record of all types of monitoring numbers in the monitoring record table; all monitoring records of all monitoring numbers are queried from the monitoring record index chain where the first record of all types of monitoring numbers is located. 6. The method according to claim 5, characterized in that said step 2) further comprises: the system queries the basic user data in the original user basic information table in the visitor location register, if the accused user is a local user, Then, the basic data of the accused user in the user basic information table is indexed to the first interception number of the user in the interception number table according to the interception number, and the same-user interception number chain of the user is queried; if the accused user is not a local user, in the user If there is no basic data of the user in the basic information table, the hash value of the number is calculated according to any type of number of the user through the hash algorithm, and the two-way information is queried in the monitoring number table according to the obtained hash value through the corresponding hash table. The same type of monitoring number chain with the same hash value, the monitoring number is queried through this chain, and the same user monitoring number chain of the user is queried from this number. 7. The method according to claim 4, characterized in that: the monitoring number table further links the free space for placing numbers to form a two-way chain of free numbers; the monitoring record table further links the free space for placing records Link up to set up a two-way idle record chain. 8. The method according to claim 1, further comprising: when the monitoring information center sets a new monitoring number, the exchange adds the record to the visiting location through the interface between the mobile switching center and the visiting location register Controlled user database in the register. 9. The method according to claim 7, characterized in that the process of adding a record in the database of the accused user is: in the monitoring number list, take out an idle node from the idle number chain, and add the number to the idle node. At the same time, link the newly added node with the monitoring number of other users of the same type with the same hash value. If the monitoring number table already includes the number and other types of monitoring numbers of the user, link the number with them ; In the monitoring record list, take out an idle node from the idle record chain, add the record to the idle node, and add the monitoring record to the idle record node at the same time, and combine the newly added node with the same The monitoring record of the monitoring number is linked. 10. The method according to claim 7, characterized in that the process of canceling the monitoring number by the monitoring information center is: in the monitoring number table, delete the monitoring number in the node where the monitoring number is located and cancel the connection between the node and other monitoring numbers. Number link relationship, put the idle node back into the idle number chain; The point is placed back in the free record chain.

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