KR20040074243A - Base station coverage limiting method in mobile telecommunication system - Google Patents

Abstract

PURPOSE: A method for limiting coverage by base station in a mobile communication system is provided to preset a base station coverage radius, thereby preventing an unnecessary call signal from being transmitted and saving resources of a wireless call network. CONSTITUTION: A terminal sets reference data supplied from a base station management station, and stores the set reference data(201), and receives chip delay data of a PN(Pilot Sequence Number) supplied from a base station(203). The terminal compares the reference data with the chip delay data(205). If the reference data is smaller than the chip delay data, the terminal transmits a handoff reject message(206), and connects a call by maintaining a current state of the base station without executing a handoff process(207). If the reference data is bigger than the chip delay data, the terminal transmits a handoff execution message to the base station(209), and connects a speech path through other base station.

Description

Base station coverage limitation method of mobile communication system {BASE STATION COVERAGE LIMITING METHOD IN MOBILE TELECOMMUNICATION SYSTEM}

The present invention relates to a method for limiting coverage for each base station in a mobile communication system, and more particularly, to a coverage limitation method for limiting serviceable coverage for each base station by distance unit.

1 is a block diagram of a general code division multiple access (CDMA) mobile communication system.

As shown in FIG. 1, the MS 11 of the mobile communication system communicates with the base station 12 wirelessly to transmit and receive call connection and traffic messages, and connects the user to the base station 12 to provide voice. It functions as a signal processing for conversion and incoming / outgoing calls.

The base station (BTS) 12 wirelessly communicates with the terminal 11 to perform call control functions such as call connection and transmission and reception of traffic data, and is connected by the base station control station 13 by wire to transmit the terminal 11. It transmits a call connection or traffic message to the base station control station 13, or transmits a message transmitted to the terminal 11 by the base station control station 13 to the terminal (11).

In addition, it performs signal processing for communication with the base station control station 13 and maintenance processing by communicating with the operating station. Here, the base station 12 provides a service by dividing it into one or more areas, which is called a sector.

The base station control station 13 is connected to a plurality of base stations 12 to perform call processing functions such as call / receive and handoff between the base station 12 and the switching center 14, and perform maintenance of the base station 12. To function.

The switching center 14 connects to the base station control station 13, the public switched telephone network (PSTN), and other switching stations 14 to perform mobile phone call / receive call processing, handoff processing, system maintenance, and operation management functions.

In general, a mobile communication system arranges a plurality of base stations 12 in a service area due to problems such as frequency use efficiency and power consumption, and provides services by dividing into sectors within the same base station 12. In this case, when the terminal 11 moves during a call, the terminal 11 provides a handoff function that constantly connects to a wireless channel of another base station 12 or another sector in order to maintain continuity of the call.

In such a conventional mobile communication system, since the distance unit of the handoff is not limited, an unnecessary signal is transmitted far and thus a problem of serious waste of resources of the wireless communication network has often occurred.

The present invention has been proposed to solve the above problems, and provides a method for limiting coverage for each base station of a mobile communication system that can prevent unnecessary signals from being transmitted far in the mobile communication system, thereby saving radio resource waste. The purpose is.

The present invention for achieving the above object, in the coverage limit method for each base station of the mobile communication system,

a) storing reference data for the coverage restriction area set in the base station management station in the terminal;

b) receiving chip delay data among pilot sequence numbers transmitted from the base station;

c) comparing the reference data of step a) with the chip delay data of step b); And

d) in the step c), if the reference data is smaller than the chip delay data, transmitting the handoff reject message to the base station and not performing the handoff; if the reference data is large, transmitting the handoff execution message to the base station to perform the handoff. Include.

According to the present invention, it is possible to limit the serviceable coverage for each base station by distance unit, thereby reducing the waste of radio resources that can be generated by transmitting unnecessary signals far away.

1 is a block diagram of a general code division multiple access mobile communication system.

2 illustrates a configuration of a mobile communication system according to the present invention.

3 is a flowchart illustrating a process of limiting coverage for each base station in a mobile communication system according to the present invention.

4 is a flowchart illustrating a process of limiting coverage for each base station in a mobile communication system according to another embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

11: terminal 11a: recording medium

12 base station 13 base station control station

13a: base station control station 14: switching center

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a view showing the configuration of a mobile communication system according to the present invention. Referring to FIG. 2, the terminal 11 to which the present invention is applied has a first function of receiving and storing reference data indicating a coverage restriction area provided from the base station management station 13a and the base station 12. The second function of receiving the chip delay data of the pilot sequence number and the chip delay data of the first function and the chip delay data of the second function are compared to transmit a handoff execution message to the base station when the reference data is larger than the chip delay data. The apparatus further includes a recording medium 11a for executing a handoff, and in a small case, transmitting a handoff reject message to the base station 12 to record a program for executing a third function that does not perform handoff.

In the mobile communication system applied to the embodiment of the present invention provided as described above, the terminal 11 receives and stores the reference data for the coverage restriction area set by the base station management station 13a and then provides it from the base station 12. The chip delay data of the pilot sequence number (PN) is compared.

For example, if the reference data of the coverage restriction area is about 45Km and the chip delay data is 15Km, a handoff is performed to connect the call. If the chip delay data is 45Km or more, a handoff reject message is provided to the base station 12. The base station 12 receiving the handoff reject message maintains its current state.

3 is a flowchart of an embodiment of a method for limiting coverage of a mobile communication system according to the present invention.

As shown in FIG. 3, in the code division multiple access system according to the present invention, the terminal 11 sets and stores reference data provided from the base station management station 13a (step 201) and is provided from the base station 12. Chip delay data of pilot sequence number PN is received (step 203).

The terminal 11 compares the reference data with the chip delay data (step 205) and transmits a handoff reject message when the reference data is smaller than the chip delay data (step 206). The base station remains in the current state and is connected (step 207), and if the reference data is larger than the chip delay data, a handoff execution message is sent to the base station 12 (step 209), and the handoff execution provided from the base station 12 is performed. The terminal 11 receiving the command connects a call path through another base station.

4 is a flowchart of another embodiment of a method for limiting coverage of a mobile communication system according to the present invention.

The terminal 11 and the base station control station 13 to which the present invention is applied have an eleventh function for storing reference data indicating a maximum coverage restriction area set by the base station management station 13a, and a GPS signal provided from a satellite (not shown). 12th function for receiving the position data of the second and the 13th function for performing the handoff if the reference data is smaller than the position data by comparing the position data and the reference data, if the reference data is smaller than the position data; It further includes a recording medium having a program.

Here, when the coverage limitation method is applied to a terminal equipped with a GPS receiver capable of receiving satellite signals, the latitude and longitude information of the base station 12 in the system parameter message between the terminal 11 and the base station 12 and the terminal 11 Compute the difference of the position information of the, and compares the result of the calculation and the reference data to transmit the handoff execution message and the handoff reject message.

That is, as shown in Fig. 4, the base station control station 13 which has received the reference data provided from the base station management station 13a stores the reference data (step 301) and receives the position data provided from the terminal. (Step 303).

Then, the reference data of the step 301 and the position data of the step 303 are compared (step 305), and if the reference data is smaller than the position data, a handoff reject message is transmitted (step 306). Without executing, the base station remains in the current state and accesses the call (step 307).

On the other hand, if the reference data is larger than the position data in step 305 (step 309), handoff is performed to connect the call path through another base station.

As described above, according to the base station coverage limit method according to the present invention, by setting the base station coverage radius in advance to prevent unnecessary call signals are transmitted far, it is possible to save the resource waste of the wireless communication network that can occur Can be.

Although one embodiment of the present invention has been illustrated and described above, the present invention is not limited to the above-described embodiment but is defined by the following claims, and the present invention belongs to the present invention without departing from the gist of the present invention. It can be modified in various forms by those skilled in the art.

Claims (2)

In the coverage limitation method for each base station applied to a mobile communication system, a) storing reference data for the coverage restriction area set in the base station management station in the terminal; b) receiving chip delay data among pilot sequence numbers transmitted from the base station; c) comparing the reference data of step a) with the chip delay data of step b); And d) in step c), if the reference data is larger than the chip delay data, a handoff execution message is transmitted to the base station to perform a handoff to connect a call path through another base station; And a step of not performing a handoff by performing the base station coverage limitation method of the mobile communication system. In the coverage limitation method for each base station of a mobile communication system capable of receiving a GPS signal, a) storing reference data for the coverage restriction area set in the base station management station; b) receiving position data among the GPS signals transmitted from the satellites; c) comparing the reference data of step a) with the position data of step b); And d) in step c), if the reference data is larger than the location data, send a handoff execution message to the base station to perform a handoff to connect a call path through another base station, and if small, send a handoff rejection message to the base station; And a step of not performing handoff.