KR0162832B1 - Subscribers location detecting method in digital cellular network - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

It relates to a digital mobile communication network.

2. The technical problem to be solved by the invention

Provided is a method for detecting terminating subscriber location information in a digital mobile communication using the location information stored in the mobile communication switching station when it is determined that the terminating subscriber is a line access identifier in the mobile communication switching station set to the line access identifier for any subscriber station number. do.

3. Summary of the Solution of the Invention

In a digital mobile telecommunication network having a visitor location register, a plurality of base stations and a public switched telephone network are connected to a mobile telecommunication switching center set with a line access identifier, and connected to at least one mobile telecommunication station and a home location register having embedded subscriber location information. A processing method for establishing a call by detecting a location of a called subscriber by the mobile telecommunication switching center, the method comprising: inputting a called number for establishing a call; translating the called number to make the called subscriber a subscriber in the digital mobile communication network. Checking that the called party number is set to the line access identifier or transmitting a call to another digital mobile communication network when the subscriber station is not a subscriber in the mobile communication network, and the called station number is set to the line access identifier The incoming call from the visitor location register when there is Detecting the subscriber information of the subscriber and requesting the location information of the called subscriber to the home location register when the called station number is not set to the line access identifier in the inspection process, and the location of the called subscriber is moved. When the visitor location register is identified as a subscriber in the communication switching center, the visitor location register detects subscriber information of the called subscriber, and forms a call path based on the subscriber information of the detection process.

4. Important uses of the invention

This procedure simplifies the procedure in detecting the location information of the mobile subscriber in the mobile communication switching center of the digital mobile communication network.

Description

Recipient Location Information Detection Method in Digital Mobile Communication

1 is a block diagram of a general digital mobile communication network.

2 is a block diagram of a general mobile communication switching center.

3 is a flowchart illustrating a process of establishing a call by detecting conventional destination subscriber location information.

4 is a flowchart for designating an arbitrary station number as a subscriber number of a mobile communication switching center for detecting called party location information in the digital mobile communication of the present invention.

5 is a flowchart illustrating a process of establishing a call by detecting incoming subscriber location information of the present invention.

* Explanation of symbols for the main parts of the drawings

112: digital mobile communication network 114: mobile communication switching center

116: Visitor Location Register 118: Home Location Register

110-1 to 110-N: base station 210: call control unit

212: number translation unit 230: key input unit

The present invention relates to a Digital Cellular Network (DCN), and more particularly, to a method for establishing a call by finding an exact location of a called subscriber when an incoming call comes in.

A block diagram of a typical digital mobile communication network is shown in FIG. Hereinafter, referring to FIG. 1, the digital mobile communication network 112 performs a service for wireless communication using wireless frequencies. Accordingly, the digital mobile communication network 112 includes a visitor location register (VCR) 116 and a visitor location register 116 for storing information on mobile subscribers registered at an arbitrary base station, and services such as switching to mobile subscribers. A Home Location Registrar (HLR) connected to a Mobile Swiching Center (MSC) 114 and at least one mobile communication switching center for storing and managing information on mobile subscribers under the control of the mobile communication switching center. 118 and a certain range are allocated, and transmit and receive radio frequencies for mobile subscribers of the corresponding range, and base stations system (BSS) 110-1 to 110-N connected to a plurality of mobile communication switching stations. Configure. The mobile subscribers m1 and m2 realized by a mobile mobile phone or a portable mobile phone communicating with each other by using a digital mobile communication network and using a radio frequency are wireless base stations 110-1 to 110-N. Send and receive. Subscriber m3 may also receive service from digital mobile communication network 112. The Public Switched Telephone Network (PSTN) 120 connected to the mobile telecommunication switching station 114 and the wired subscriber t1 performs a service for wired communication.

Accordingly, in order to perform a communication service using the digital mobile communication network 112, location information of mobile subscribers m1 and m2 is required. This is because the mobile subscribers m1 and m2 always move to an unspecified area, so that the mobile communication switching station 114 should store accurate location information to reach the mobile subscribers m1 and m2. Therefore, the mobile subscribers m1 and m2 periodically store their current location in the subscriber information storage device. The subscriber information storage device is implemented with a home location register 118 and a visitor location register 116.

A block diagram of the general mobile communication switching station 114 is shown in FIG. Hereinafter, a description will be given with reference to FIG. 2.

The mobile communication switching station 114 is connected to a call control unit 210 for controlling a call transmitted and received with the base station 110-1 and a base station 110-1, and to a call connected with a paging control unit 214 for requesting and processing paging to a base station for an incoming call. Originating and receiving calls to the switching control unit 216, which handles switching inside the switching center, and the relay line control unit 218, which transfers a call to another network or other mobile communication switching center or controls a call transferred from another network or other mobile communication switching center. It is connected to the visitor location register 116 in FIG. 1 and the call control unit 210 in FIG. 1 which stores the location information under the control of the number translation unit 212 and the call control unit 210 for translating a number, or requests information from an external home location register 118. And a home location register interface 222 for interfacing to process. The key input unit 230 connected to the number translation unit 212 belongs to a central control system (not shown) and is used by the operator to store and remove an arbitrary communication number corresponding to the mobile communication switching center 114.

FIG. 3 is a flowchart illustrating a conventional process of detecting a called party location information and establishing a call. Hereinafter, a detailed description will be given with reference to FIGS. 1, 2, and 3.

When an outgoing call or relay call is input from any mobile subscriber or another network and other mobile communication switching station attempting to make a call in step 311, the call control unit 210 outputs the called number input with the outgoing call to the number translation unit 212, The relay line controller 218 outputs the called number input together with the relay call to the number translation unit 212. The number translation unit 212 then translates the called number applied under the control of the call control unit 210 or the relay line control unit 218 in step 312. In response to the translation of the called number in step 313, the call controller 210 searches whether the called subscriber exists in the digital mobile communication network 112 of FIG. In this case, if the called subscriber transmits the call to the other network through the relay line controller 218 in step 314, the called subscriber belongs to another network, and if the called subscriber is a subscriber in the digital mobile communication network 112, the home location register interface unit 222 is located in step 315. Request destination information to register 118. Thus, it is checked in step 316 whether the location of the called subscriber exists in the mobile telecommunication switching station 114 that requested the called location information. When the subscriber does not exist in the mobile communication switching station 114 but exists in another mobile communication switching station, the call is transferred to another mobile communication switching center through the relay line controller 218 in step 317. On the other hand, when the search result in step 316 exists in the same mobile communication switching center as the mobile communication switching station 114 requesting the called location information, the calling party subscriber information is requested in step 318. In step 318 the visitor location register 116 checks in step 319 if the called subscriber is a mobile subscriber. Thus, when the called subscriber is not the mobile subscriber, the subscriber line is requested to occupy the subscriber line in step 322, and the called subscriber performs paging processing to the base station of the corresponding range where the called subscriber is located through the paging control unit 214 in step 320. Accordingly, when the called party is called in step 321, the call controller 210 switches to the switching controller 216 to switch. Thus, the calling party and the called party form a call path in step 323. However, when the calling subscriber stops calling in step 324, the call is not formed and the call establishment process ends.

That is, the call controller 210 translates the called number to establish a call and requests the called location information to the home location register 118 when the subscriber is in the mobile communication switching center 114.

At this time, the range of the base station belonging to a specific communication switching station is large. Thus, a mobile subscriber located in a particular mobile telecommunication switching center is very likely to be located in an area within the same mobile telecommunication switching center even if it moves to any area. Nevertheless, whenever an incoming call to the mobile subscriber occurs, a procedure for requesting the location information of the mobile subscriber should be performed to the home location register 118 every time. This may cause the load of the home location register 118 to degrade the performance of the system. As a result, temporary loads above the appropriate level are temporarily placed on the home location register 118, causing a catastrophic adverse effect on the failure of the entire system to provide services.

Accordingly, an object of the present invention is that a receiving subscriber in a digital mobile communication using the location information stored in the mobile communication switching station when it is determined that the receiving subscriber is a line access identifier in the mobile communication switching station set to the line access identifier for any subscriber's station number. The present invention provides a method for detecting location information.

In order to achieve the above object of the present invention, a mobile communication switching center having a visitor location register, and having a line access identifier, is connected to a plurality of base stations and public switched telephone networks, and has at least one home location register having subscriber location information. A processing method for establishing a call by detecting a location of a called subscriber by a mobile communication switching station in a digital mobile communication network connected to a mobile communication switching station, the method comprising: a process of inputting a called number for establishing a call and translating the called number; When the subscriber is a subscriber in the digital mobile communication network, checking that the called station number is set to the line access identifier, or transmitting a call to another digital mobile communication network when the subscriber is not in the mobile communication network; The station number is set to the first access identifier. Detecting the subscriber information of the called subscriber at the visitor location register, and requesting the location information of the called subscriber to the home location register when the called station number is not set as the line access identifier in the inspection process. Detecting the subscriber information of the called subscriber at a fraud visitor location register when the location of the called subscriber is identified as a subscriber in the mobile communication switching center, and forming a call path based on the subscriber information of the detection process; Characterized in that consists of.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that like elements in the figures represent like reference numerals wherever possible.

The term line access identifier as used herein refers to a number of specific station numbers set by the operator for subscriber numbers. In other words, when the subscriber number is input, it indicates that the station number has pre-accessed to the visitor location register with respect to the station number set as the line access identifier.

4 is a flowchart for designating an arbitrary station number for detecting subscriber subscriber location information in a mobile communication station of the present invention as a subscriber number to the mobile switching center 114. As shown in FIG. Hereinafter, a description will be given with reference to FIGS. 1, 2, and 4.

Step 411 is shifted to step 412 when the station number generation request key for designating an arbitrary station number as a subscriber number from the key input unit 230 of the central control system is entered by the operator into the number translation unit 212 in step 411. When an arbitrary station number is input to the number translation unit 212 in step 412, the call control unit 210 stores the corresponding station number in the preset storage area of the number translation unit 212 in step 413. Thereafter, when the line access identifier set key for setting the corresponding station number as the line access identifier is input in step 414, step 414 is transferred to step 415. In step 415, the corresponding station number is set in the line access identifier allocation area of the number translation unit 212 in order to set the corresponding station number. On the other hand, when the line access identifier set key is not input in step 414, the corresponding station number is designated as the subscriber number but is not set as the line access identifier.

The memory status of the line access identifier set in the number translation unit 212 is shown in the table below.

The table is an information on station numbers. That is, the station number of the subscriber number input from the key input unit 230 by the operator is stored in the number translation unit 212 as shown in the above table.

5 is a flowchart illustrating a process of detecting a called party location information of the present invention and establishing a call. Hereinafter, a detailed description will be given with reference to FIGS. 1, 2, and 5.

When an outgoing call or a relay call is input from any mobile subscriber or other network and another mobile communication switching station that attempts to make a call in step 511, the call control unit 210 outputs the called number input with the outgoing call from the number translation unit 212. The relay line control unit 218 outputs the called number input together with the relay call to the number translation unit 212. The number translation unit 212 then translates the called number applied under the control of the call control unit 210 or the relay line control unit 218 in step 512. In response to the translation of the called number in step 513, the call controller 210 searches whether the called subscriber exists in the digital mobile communication network 112 of FIG. Therefore, when the called subscriber is a subscriber belonging to another network, the call is transferred to the other network through the relay line controller 218 in step 514. If the called subscriber is a subscriber in the digital mobile communication network 112, the call access number is determined from the station number of the called number in step 515. Check if it is set. Therefore, when the destination station number is not set as the line access identifier in step 515, the destination location information is requested to the home location register 118 through the home location register interface unit 222 in step 517, and the following procedure provides a conventional location information detection method. Is the same as

However, if the station number for the called party number is set to the first access identifier, step 515 is shifted to step 516. In step 516, subscriber information of the called subscriber is requested directly to the visitor location register 116. In step 520, if there is no subscriber information of the called party in the visitor location register 116, if the subscriber information of the called party does not exist in the visitor location register 116, the process returns to step 517.

If there is subscriber information of the called subscriber in the visitor location register 116, and the called subscriber is not a mobile subscriber in step 521, step 521 is transferred to step 523. In step 523, the call controller 210 requests to occupy the subscriber line. In addition, if the called subscriber is a mobile subscriber in step 521, the call controller 210 may page the corresponding base station through the paging control unit 214 in step 522. Accordingly, when the called subscriber arrives at step 524, the call controller 210 requests switching to perform switching. Thus, the calling party and the called party form a call path in step 526. However, when the calling subscriber stops calling in step 525, the call is not formed and the call establishment process ends.

As described above, when an incoming call is attempted for any subscriber existing in a specific mobile communication switching station 114, the present invention is used when the destination number for the called party is translated and set as a line access identifier for the station number of the called number. do. In other words, by omitting the inefficient procedure of requesting incoming location information to the home location register 118 through the home location register interface unit 222 and requesting the subscriber information to the visitor location register 116, the system can reduce the load on the home location register 118 to reduce the performance of the system. Eliminate the cause of deterioration. Therefore, it is possible to maintain the system in a stable state all the time, and also to control the distribution and concentration of the load given to the system by adjusting or disabling the line access identifier for any station number according to the state of the system for efficient operation of the digital mobile communication network. Maximize.

Claims (3)

In a digital mobile telecommunication network having a visitor location register, a plurality of base stations and a public switched telephone network are connected to a mobile telecommunication switching center set with a line access identifier, and connected to at least one mobile telecommunication station and a home location register having embedded subscriber location information. A processing method for establishing a call by detecting a location of a called subscriber by the mobile telecommunication switching center, the method comprising: inputting a called number for establishing a call; translating the called number to make the called subscriber a subscriber in the digital mobile communication network. Checking that the called party number is set to the line access identifier or transmitting a call to another digital mobile communication network when the subscriber station is not a subscriber in the mobile communication network, and the called party number is set to the previous access identifier in the checking process. The incoming call from the visitor location register when there is Detecting the subscriber information of the subscriber and requesting the location information of the called subscriber to the home location register when the called station number is not set to the line access identifier in the inspection process, and the location of the called subscriber is moved. Detecting the subscriber information of the called subscriber at the visitor location register when the user is identified as a subscriber in the communication switching center, and forming a call path based on the subscriber information of the detection process. A method for detecting called party location information in communication. The method of claim 1, further comprising: storing the station number when an arbitrary station number is input after a station number generation request key is input to the mobile communication switching station; and requesting setting the station number as a line access identifier after the storing process. And when the access identifier set key is input, setting the station number as a line access identifier. A plurality of base stations and a public switched telephone network are connected to a mobile telecommunication switching center having a visitor location register, and the mobile telecommunication switching center is a called subscriber in a digital location telecommunication network connected to at least one mobile telecommunication switching center and a home location register having embedded subscriber location information. A processing method for establishing a call by detecting a location of a mobile station, the method comprising: storing a station number when an arbitrary station number is input after a station number generation request key is input to the mobile communication switching station; When the pre-access identifier set key requesting the setting as the line access identifier is input, setting the station number as the line access identifier, inputting a called number for establishing a call, and translating the called number to the called subscriber. When the subscriber is in the digital mobile communication network, the called station number is set as the line access identifier. The caller to the other digital mobile communication network when the mobile station checks whether there is a subscriber or the subscriber within the mobile communication network, and when the called station number is set to the line access identifier in the checking process, the called subscriber in the visitor location register. Detecting the subscriber information of the subscriber station and requesting the location information of the called subscriber to the home location register when the called station number is not set to the line access identifier in the inspection process. Detecting the subscriber information of the called subscriber at the visitor location register when the subscriber is confirmed to be a subscriber in the switching center, and paging processing when the called subscriber is a mobile subscriber based on the subscriber information of the detection process; To occupy the subscriber line A method for detecting called party location information in a digital mobile communication, comprising: forming a call path by switching to a called party.