KR20040050145A - Paging method of mobile station in a mobile communication system - Google Patents

Abstract

PURPOSE: A paging method of a terminal in a mobile communication system is provided to set the second paging region to be bigger than the first paging region if a paging process fails, thereby securing a paging success rate and efficiently using wireless resources. CONSTITUTION: When a paging request is generated, a mobile management station searches a base station at which a terminal is finally location-registered (200), and obtains values of base stations included in a preset paging radius(210). The management station generates the first paging region information, and transmits a paging command message to a base station controller(220). The base station controller attempts paging according to the first paging region information(230). The management station decides whether the paging is successful(240). If not, the management station obtains values of base stations included in the second paging radius(260), and generates the second paging region information(270). The management station transmits a paging command message to the base station controller. The base station controller attempts paging according to the second paging region information(280).

Description

PAGING METHOD OF MOBILE STATION IN A MOBILE COMMUNICATION SYSTEM}

The present invention relates to a mobile communication system, and more particularly, to a paging processing method of a subscriber.

In general, in a mobile communication system, a connection must be made with base stations in order to provide certain services to a mobile terminal. For such a connection, a switch calls a subscriber's terminal or provides a service for the terminal to answer a call. It should be provided by default. In addition, the base stations should basically provide a service for receiving information from a location register (HLR) in which the terminal information is stored and updating the changed location information according to the movement of the subscriber in order to determine whether the terminal is a terminal belonging to its own area. do. Accordingly, the base station determines the location of the terminal and transmits a paging message indicating that the data has arrived to the terminal. Accordingly, when paging is completed, the terminal is connected to the base station.

In a mobile communication system for high-speed packet data service, for example, CDMA2000 1x or HRPD (High Rate Packet Data) network, the call area of the calling process is largely composed of five types. That is, five types of base station, base station control unit, paging area ID 1, paging area ID 2, and subnet SUBNET are configured. The above five areas were preconfigured according to the network structure of the service provider, and then the call processing was performed to the designated areas when the call was to be attempted.

1 is a diagram showing a call area configuration according to the prior art.

Each of cells 1 to 64 shown in FIG. 1 refers to 64 base station cell regions configured in the base station control unit 1. Here, PAI can be configured from 0 to 1535. In order to configure a call area, first, a PAI is configured for a base station control unit and a base station, and a method of using a call area is also considered. As described above, in the CDMA2000 1x EVDO system, a base station, a base station controller, a call area identifier 1 (hereinafter referred to as PAI1), a call area identifier 2 (hereinafter referred to as PAI2), and a subnet You can set the calling area in five areas of (SUBNET). The PAI is configured by the operator command, the base station controller and the call area of the base station manually. Table 1 below shows a configuration example of 14 PAIs.

PAI # 1 = {1,10.11.19.20.21} PAI # 2 = {2, 11, 12, 20, 21, 29, 30, 39} PAI # 3 = {3, 4, 5, 13, 14, 15 , 23, 24, 33}, PAI # 4 = {7, 8, 17} PAI # 5 = {6, 7, 8, 9, 16, 17, 18} PAI # 6 = {39, 48, 49, 57 , 58} PAI # 7 = {38, 39, 40, 41, 48, 49, 50, 51} PAI # 8 = {22, 23, 24, 32, 33, 42} PAI # 9 = {23, 24, 25, 32, 33, 34, 42, 43, 52} PAI # 10 = {45, 54, 55, 62, 63} PAI # 11 = {44, 52, 53, 54, 55, 56, 60, 61, 62, 63, 64} PAI # 12 = {39, 48, 49, 57, 58} PAI # 13 = {39, 40, 41, 48, 49, 50, 51} PAI # 14 = {7, 16, 17 , 25, 26, 27}

The call areas of PAI # 1, PAI # 5, PAI # 6, PAI # 8, and PAI # 9 of the call areas shown in Table 1 are as shown in FIG.

In the system having the above configuration of the call area, it is assumed that the calling method is set to PAI1 for the primary call and PAI2 for the secondary call. That is, in case of base station 33, PAI1 is allocated to PAI # 8 and PAI2 is allocated to PAI # 9. If the primary call set to PAI1 fails, the secondary call attempts to configure PAI # 9 as PAI2. If the last location registration of the terminal to be called is base station 33, when a call request for the terminal occurs, the data location register (SC / MM: Session Controller / Mobility Manager, Session Control Mobility Management Block) of the terminal is stored in the subscriber database. PAI1 and PAI2 values of the base station controller and the base station are obtained by referring to the base station controller and the base station information and the PAI database. Thereafter, a base station configured in the PAI1 and the PAI2 is obtained, and a call command is transmitted to the base station control unit. The base station controller which receives the call command calls the terminal through the base station. Here, if the base station registered in the last position of the terminal is another base station, the PAI should be obtained again to configure a call area. The data location register of the terminal has the same meaning as the mobility management station or session control mobility management block of the terminal, which will be collectively referred to as mobility management station.

If the base station is additionally added or reduced, it is necessary to reconfigure the PAI. That is, the paging method according to the prior art configures the PAI through several processes to configure the paging area. In addition, in order to configure the PAI, an operator must directly input a command, which causes a problem of being exposed to a data error.

It is therefore an object of the present invention to provide ease of call area construction.

Another object of the present invention is to provide a method of increasing paging success rate of a terminal and reducing system error.

The present invention to achieve these objects

When a paging request occurs, obtaining a final location registered base station of the terminal, the process of obtaining a value of the base stations belonging to the preset first paging radius centered on the last location registered base station, and the first paging radius Generating first paging area information including base stations belonging to the mobile station; transmitting a paging command message including the generated first paging area information to a base station control unit; Accordingly, the process of attempting paging.

In addition, determining whether the paging is successful, and if not successful, obtaining a value of the base stations belonging to the second paging radius larger than the first paging radius by a predetermined length, and to the base stations belonging to the second paging radius Generating second paging area information, and transmitting a paging command message including the generated second paging area information to a base station controller; and the base station controller attempts paging according to the second paging area information. The process further includes.

The foregoing has outlined rather broadly the features and technical advantages of the present invention in order that those skilled in the art may better understand the detailed description of the invention that follows.

Additional features and advantages of the invention will be described hereinafter which form the subject of the claims of the invention. Those skilled in the art should recognize that the disclosed concepts and specific embodiments of the invention may be readily used as a basis for modifying or designing other structures for achieving the same purposes of the present invention. Those skilled in the art should also recognize that structures equivalent to the invention do not depart from the spirit and scope of the broadest form of the invention.

1 is a diagram showing a configuration of a call area according to the prior art;

2 is a flow chart illustrating a paging method in accordance with the principles of the present invention;

3 is a diagram illustrating a paging area configuration according to an embodiment of the present invention.

DETAILED DESCRIPTION A detailed description of preferred embodiments of the present invention will now be described with reference to the accompanying drawings. It should be noted that reference numerals and like elements among the drawings are denoted by the same reference numerals and symbols as much as possible even though they are shown in different drawings. In the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

The present invention relates to a paging method of a terminal by the mobility management station in a mobile communication system having a mobility management station for managing location and paging information of the terminal. In describing the embodiment according to the present invention, the CDMA2000 1x EVDO system will be described in detail. However, the present invention has the same function as that of the mobility management station, and other systems having components that can achieve the same result in the same manner. The present invention can be applied to other systems besides CDMA2000 1x and CDMA2000 EV-DV.

The principle of the present invention stores the latitude / longitude information of the base station, i.e., location information and Route Update Radius, in the database of the mobility management station, and based on this value, a paging request has been generated. When the subscriber (or the terminal) transmits a paging signal to a base station belonging to the paging radius area based on the base station registered last position. The paging radius is set to be fluid, thereby increasing the paging success rate. In addition, when the paging fails, a higher paging success rate is ensured by setting the secondary paging area to a certain level larger than the paging area, and the efficiency of radio resources is also guaranteed.

2 is a flow chart illustrating a paging method in accordance with the principles of the present invention.

First, information of base stations belonging to the mobility management station is stored in a database in advance. The information of the base stations is information stored in the mobility management station database automatically using a database without an operator manually working. Referring to FIG. 2, when a paging request occurs, in step 200, the mobility management station obtains a base station registered by the terminal in its last location. In step 210, the mobility management station obtains a value of base stations belonging to a preset paging radius based on the last location registered base station. Hereinafter, the preset paging radius is called a first paging radius. The paging radius can be specified in multiple steps: primary, secondary, ... This is to increase the paging success rate by expanding the paging area during paging attempts. In step 220, the mobility management station generates first paging area information consisting of base stations belonging to the first paging radius, and transmits a paging command message including the generated first paging area information to the base station controller. In step 230, the base station controller attempts paging according to the first paging area information.

In step 240, the mobility management station determines whether paging is successful. If the paging is successful, the paging request terminal and the paging target terminal are connected to the call path in step 250. If the paging fails as a result of the determination, in step 260, a value of the base stations belonging to the second paging radius larger than the first paging radius by a predetermined length is obtained. The second paging radius is a value greater than a predetermined value greater than the first paging radius according to the operator's setting. In step 270, the mobility management station generates second paging area information including base stations belonging to the second paging radius, and transmits a paging command message including the generated second paging area information to the base station controller. In step 280, the base station controller attempts paging according to the second paging area information.

3 is a diagram illustrating a paging area configuration according to an embodiment of the present invention.

In the following description, it is assumed that the base station registered by the subscriber is number 33. Referring to FIG. 3, base stations currently included in the primary paging radius are 23, 24, 33, 34, 42, and 43. The mobility management station transmits a paging command message including information about the base stations to the base station controller. The base station controller attempts to page the base station, 23, 24, 33, 34, 42, 43 according to the information. If paging is successfully processed, the subscriber will be successful.

If the primary paging fails, secondary paging is attempted. Referring to FIG. 3, the base stations included in the secondary paging radius are 13, 14, 15, 22, 23, 24, 25, 31, 32, 33, 34, 35, 41, 42, 43, 44, 51, Base stations 52 and 53. The mobility management station transmits a paging command message including information about base stations included in the secondary paging radius to the base station controller. The base station control unit paging to the base station, 13, 14, 15, 22, 23, 24, 25, 31, 32, 33, 34, 35, 41, 42, 43, 44, 51, 52, 53 according to the information Try.

As described above, an embodiment of the present invention configures the reference of the paging area according to the distance. Thus, unlike the conventional paging area configuration, there is no need to configure a paging area with a base station, a base station controller, PAI1, PAI2, and subnet. This is because if the location information and paging radius of the base station are stored in advance in the mobility management station and only the setting of the paging radius is changed, the primary and secondary paging areas are automatically determined.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications may be made without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the scope of the following claims, but also by the equivalents of the claims.

As described above, the present invention has the advantage of providing ease of call area configuration. In addition, the present invention has the advantage of increasing the paging success rate of the terminal, reducing the system error.

Claims (3)

A paging method of a terminal by the mobility management station in a mobile communication system having a mobility management station for managing location and paging information of a terminal and storing location information of a base station, When the paging request is generated, obtaining a final location-registered base station of the terminal; Obtaining values of base stations belonging to a first preset paging radius centering on the last registered base station; Generating first paging area information consisting of base stations belonging to the first paging radius and transmitting a paging command message including the generated first paging area information to a base station controller; The base station controller comprises the step of attempting to paging according to the first paging area information. The method of claim 1, further comprising: determining whether the paging is successful; otherwise, obtaining a value of base stations belonging to a second paging radius larger than the first paging radius by a predetermined length; Generating second paging area information consisting of base stations belonging to the second paging radius and transmitting a paging command message including the generated second paging area information to a base station controller; The base station controller further comprises the step of attempting paging according to the second paging area information. The method as claimed in claim 1, wherein the first preset paging radius is changeable by an operator.