KR20040033981A - Method for location registration and paging of mobile terminal in mobile communication system - Google Patents

Abstract

PURPOSE: A position managing and paging method of a mobile station in a mobile communication system is provided to install paging agents in base station control devices, and to maintain information on a base station device identifier where a mobile station is located, so as to perform a local paging process only for a single or many base station devices where a destination mobile station is recently located, thereby saving paging frequency and paging channels. CONSTITUTION: An HLR(51) and a VLR(61) search a region where a receiving mobile station(11) is located at the request of an originating station, and transmit a call. An MSC(41) receives the call from the HLR(51) and the VLR(61), and transmits a paging request signal. Base station control devices(31,32) receive the paging request signal from the MSC(41), determine whether to page by retrieving paging agents(81,82), and determine to maintain or delete information of the receiving mobile station(11). Base station devices(21-26) broadcast substantial paging signals.

Description

Method for location registration and paging of mobile terminal in mobile communication system

The present invention relates to a computer-readable recording medium recording a location management and paging method of a mobile station in a mobile communication system, and a program for realizing the method. In particular, a call is set up from a cellular mobile communication network to a mobile station. The present invention relates to a location management and paging method of a mobile station for reducing unnecessary paging channels by improving a paging method, and a computer-readable recording medium having recorded thereon a program for realizing the method.

In the mobile communication network, the number of the mobile station does not mean the access location of the mobile station. Therefore, in order to provide continuous communication service, it is necessary to grasp the current location of the mobile station in terms of network management.

To this end, the mobile communication network uses the Home Location Register (HLR) and the Visitor Location Register (VLR) to identify the Mobile Switching Center (MSC) of the terminating mobile terminal station. A method of paging a cell in charge of all base station apparatuses managed by an exchange is used.

The paging method will be described below with reference to the accompanying drawings.

1 is an exemplary configuration diagram of a general mobile communication system, in which "11" is a mobile station (MT), "21 to 26" is a base station apparatus (BTS), and "31 and 32" are base station control apparatus (BSC). "41" represents a mobile switching center (MSC), "51" represents a subscriber location register (HLR), "61" represents a visitor location register (VLR), and "71" represents a fixed wired network, respectively.

Here, the mobile station 11 has a terminal function for the subscriber to receive a mobile communication service, the base station apparatus (21 to 26) is connected to the mobile terminal station 11 in a wireless section by the mobile terminal station 11 ) And connect the call channel.

The base station controllers 31 and 32 are responsible for controlling a single or a plurality of base station apparatuses. The mobile switching center 41 establishes a route for the call and performs number translation to construct a subscriber's call path, perform a connection with another communication network, and manage a database of the visitor location register 61.

The subscriber location register 51 stores comprehensive subscriber information and manages the visitor location register 61 and the corresponding mobile switching center information corresponding to the current location of the mobile station, and the status, statistics, and various service related information of the mobile subscriber. It is a database that exchanges signaling information with mobile switching centers through common line signaling.

The visitor location register 61 manages each mobile switching center 41 and performs functions such as location management of the mobile subscriber, authority information management, call processing information inquiry, and handoff between the exchanges.

In general, when there is a call setup request to the mobile station, the call setup request is made to the corresponding mobile station 11 using the subscriber location register and the visitor location register information. In this case, the mobile switching station 41 has its own. All cell areas are regarded as one paging area, and a paging request signal is transmitted to all base station controllers 31 and 32. Therefore, when the mobile station 11 moves between the mobile switching stations 41, the information of the subscriber location register and the visitor location register changes.

In the above paging method, the paging processing speed is very fast, but only the base station apparatus 23 to which the actual target mobile station 11 is connected among the plurality of base station apparatuses 21 to 26 has a paging response signal from the target mobile station 11. Since there is a problem of receiving a lot of paging channels from the standpoint of the other base station apparatus (21, 22, 24, 25, 26).

In order to solve this problem, a method of setting a separate paging area for each mobile station according to the movement and call shape characteristics of the mobile station 11 has been proposed.

Among these methods, a method of adjusting the size of a paged cell based on the ratio of the number of times that the mobile station moves between cells and the number of times of making / receiving a call includes one or more paging areas for all cells managed by one mobile switching center. Paging is sequentially performed in the paging area where the mobile station is most likely to be located. In the worst case, a method of enabling sequential paging while limiting the time delay may occur because a time delay in which paging is repeated may occur as many times as the number of paging areas.

However, the above-described methods for paging according to the mobile station and the call origination type of the mobile station can effectively use a paging channel, but in reality, the mobile and the call origination type information for each mobile station should be managed. There is a problem in that the process of collecting statistical data and performing analysis, mathematical probability calculation and test paging procedure is added.

The present invention has been proposed to solve the above problems, by inserting a simple type of location registration device, that is, a paging agent into the base station control device that holds information on the base station device that the mobile station is currently located A computer-readable recording medium recording a location management and paging method of a mobile station and a program for realizing the method in a mobile communication system for more precisely retaining and maintaining location information of a mobile station. Its purpose is to provide.

1 is an exemplary configuration diagram of a general mobile communication system.

2 is a diagram illustrating an embodiment of an operation process of a location management and paging system of a mobile station according to the present invention;

In order to achieve the above object, the present invention provides a method for location management and paging of a mobile station in a mobile communication system. Delivering to the paging agent for management; A second step of determining whether paging is present and transmitting a paging signal to a single base station apparatus according to the information managed by the paging agent, and then determining whether there is a response from the mobile terminal station; A third step of deleting corresponding information of a paging agent when there is no response from the mobile station for a predetermined time as a result of the determination of the second step; And a fourth step of establishing a normal call when there is a response from the mobile station as a result of the determination of the second step.

In addition, the present invention provides a mobile communication system having a processor, comprising: a first function of a base station control apparatus for delivering a mobile terminal station identifier and information on an identifier of a base station apparatus in which the mobile terminal station is currently located so that the paging agent manages the information; A second function of determining whether paging is present and transmitting a paging signal to a single base station apparatus according to the information managed by the paging agent, and then determining whether there is a response from the mobile terminal station; A third function of deleting corresponding information of a paging agent when there is no response from the mobile station for a predetermined time as a result of the determination of the second function; And a computer-readable recording medium having recorded thereon a program for realizing a fourth function for establishing a normal call when there is a response from the mobile terminal station as a result of the determination of the second function.

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is an exemplary diagram illustrating an operation process of a location management and paging system of a mobile station according to the present invention.

As shown in Fig. 2, the location management and paging system of a mobile station according to the present invention searches for an area in which a terminating mobile terminal 11 is located according to a call request of an originating terminal station and transmits a call. Receives a call from the location register (HLR) 51 / Visitor location register (VLR) 61 and the subscriber location register (HLR) 51 / Visitor location register (VLR) 61 to transmit a paging request signal Receives a paging request signal from the mobile switching station 41 and the mobile switching station 41, searches for paging agents 81 and 82 to determine whether to paging, and to determine information retention / deletion of the destination mobile terminal 11 in question. Base station controllers 31 and 32 and base station apparatuses 21 to 26 that broadcast actual paging signals.

The paging agents 81 and 82 of the base station controllers 31 and 32 newly register or update register the corresponding mobile station identifier and the corresponding base station apparatus identifier due to the inter-cell movement of the mobile station. In addition, the paging agents 81 and 82 of the base station controllers 31 and 32 send periodic virtual paging signals to update or delete the registration information of the mobile station. Here, the identifier registered in the paging agents 81 and 82 of the base station controllers 31 and 32 uses the telephone number or serial number of the terminal station and the identifier numbers of the base station apparatuses 21 to 26.

When using the above method, an additional processing load due to the paging agent is expected in the base station controllers 31 and 32. However, the number of mobile terminals managed by the base station controllers 31 and 32 is significantly higher than the number of mobile terminals managed by the existing subscriber location register. It's small so it will be negligible. Rather, the number of base station devices where actual paging occurs is only a few because it can innovatively reduce the paging-related costs. The average value of the number of base station apparatuses where actual paging occurs will vary depending on the periodic value of the periodic virtual paging signal sent by the base station controller.

The operation process of the location management and paging system of the mobile station according to the present invention having the structure as described above in more detail as follows.

First, when the subscriber / visitor location register (51, 61) detects the area where the destination mobile terminal is located according to the call request of the calling terminal station and forwards the call, the mobile switching station (41) receives the subscriber / visitor location register (51). 61 receives the call and transmits the paging request signal.

Then, the base station controllers 31 and 32 are connected to the mobile switching center 41 to receive the paging request signal, search for a paging agent registered with an identifier for each mobile station, and perform the actual paging (21 to 26). ) And send a paging request signal to the base station apparatus 21 to 26 to broadcast the actual paging signal.

Here, the paging agents 81 and 82 of the base station controllers 31 and 32 register the corresponding base station apparatus identifier number currently located with respect to the identifier of the telephone number or the serial number assigned to the mobile terminal station 11. When the mobile station 11 enters the cell area of the new base station apparatus, the paging agent of the base station controllers 31 and 32 updates and registers with the new base station apparatus identifier number with respect to the identifier of the corresponding mobile terminal station.

In addition, the paging agents 81 and 82 periodically generate, register or delete the state of the mobile station 11 by generating a virtual paging signal in order to continuously maintain the state of the mobile station 11 being managed. .

That is, the process of performing location management and paging of the mobile station in the mobile communication system according to the present invention will be described as follows.

First, when a call request is made by an originating terminal station, a mobile switching station in which a terminating terminal station is located receives a call and transmits a paging request signal to all base station controllers connected to the mobile switching station.

Secondly, the base station controllers receiving the paging request signal retrieve the presence or absence of the identifier of the called mobile station from the paging agent in which the identifier for each terminal station is registered.

Third, if there is an identifier of the terminating mobile station in the first and second processes, the paging request signal is transmitted to the base station apparatus, and the terminating mobile station receiving the paging signal determines whether to transmit the paging response signal and sends the paging response signal. Set up the call after transmission.

For the paging step, it is necessary to change the information of the paging agent according to the inter-cell movement of the mobile station, which means that when the mobile station enters a new cell, the paging agent of the base station controller is the identifier number of the mobile station and the base station. Register the device identifier number. In order to maintain the registration information, the paging agent periodically transmits a similar paging request signal to the base station apparatus. This is not a paging for actual call setup, only a signal for checking whether the mobile station is continuously located in the cell area of the base station apparatus. That is, to prevent the situation in which the mobile station continuously holds invalid information in the paging agent of the previous base station controller due to the movement between the base station controller.

The method of the present invention as described above may be implemented as a program and stored in a computer-readable recording medium (CD-ROM, RAM, ROM, floppy disk, hard disk, magneto-optical disk, etc.).

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and changes are possible in the art without departing from the technical spirit of the present invention. It will be clear to those of ordinary knowledge.

As described above, the present invention installs a paging agent in the base station control apparatus and maintains information on the base station apparatus identifier in which the mobile terminal station is located, so that only the single or several base station apparatuses where the destination mobile terminal station is recently located. Since local paging occurs, there is an effect of saving the number of paging times and the paging channel.

Claims (5)

In the method of location management and paging of a mobile station in a mobile communication system, Transmitting, by the base station control apparatus, the paging agent to manage information about the mobile station identifier and the identifier of the base station apparatus where the mobile station is currently located; A second step of determining whether paging is present and transmitting a paging signal to a single base station apparatus according to the information managed by the paging agent, and then determining whether there is a response from the mobile terminal station; A third step of deleting corresponding information of a paging agent when there is no response from the mobile station for a predetermined time as a result of the determination of the second step; And A fourth step of establishing a normal call when there is a response from the mobile station as a result of the determination of the second step; Location management and paging method of the mobile station in the mobile communication system comprising a. The method of claim 1, The paging agent, In the mobile communication system, when the mobile station moves to the cell area of the new base station apparatus, a paging agent in the base station controller connected thereto updates or registers the terminal identifier number and the base station apparatus identifier number. Location management and paging method of mobile station. The method according to claim 1 or 2, The paging agent, A method of location management and paging of a mobile station in a mobile communication system, characterized by updating or deleting location information of the mobile station using a periodic virtual paging signal. The method of claim 3, wherein The identifier number registered in the paging agent, And a telephone number or a serial number of the mobile station and an identifier number of the base station apparatus. In a mobile communication system having a processor, A first function of transmitting, by the base station control apparatus, a paging agent to manage information about the mobile station identifier and the identifier of the base station apparatus where the mobile station is currently located; A second function of determining whether paging is present and transmitting a paging signal to a single base station apparatus according to the information managed by the paging agent, and then determining whether there is a response from the mobile terminal station; A third function of deleting corresponding information of a paging agent when there is no response from the mobile station for a predetermined time as a result of the determination of the second function; And A fourth function for establishing a normal call when there is a response from the mobile terminal station as a result of the determination of the second function; A computer-readable recording medium having recorded thereon a program for realizing this.