JPH1023500A - Base station selecting system in mobile radio communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To always select an optimum base station with respect to the position of a mobile station by compare-detecting positional information of the mobile station and communication area information of each base station stored in advance so as to select the optimum base station. SOLUTION: In the case of calling the mobile station from a control office, e.g. at the time of dialing for calling the mobile station 9 from a telephone equipment 2 within the control station, signals for calling the mobile station are successively sent from base stations 8 by way of an exchange 3, etc. At time of judging that the call signal is for its own station, the mobile station 9 converts positional information of GPS part 10 to a prescribed format by a conversion part 11. A line controller 5 receiving this signal through the base station 8 and a repeater controller 7 selects the optimum base station by an each base station communication range information memory and a mobile station position compare-detecting part 6 within the equipment, sends back a response to the telephone equipment within the control station, execute the selection of the optimum base station 8 and line constitution and allow the optimum base station 8 to send a call signal to the mobile station 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a base station selection system for a mobile radio communication system.

[0002]

2. Description of the Related Art Conventionally, in a base station selection method in a mobile radio communication system, a base station which has received a transmission signal from a mobile station converts the received input into a digital signal and converts the data into a parent system which controls the system. The base station selected the base station with the highest reception input based on this data. However, since the base station is selected based on the reception input from the mobile station to the base station, there is a risk that the base station whose reception input is high instantaneously may be selected, and the mobile station is located. There is a drawback that an optimum base station cannot always be selected for a position.

[0003]

The above-mentioned conventional system is a system in which a base station is selected based on a reception input of the base station. However, since the other party is a mobile station, communication is performed during movement. In this case, the reception input of the base station often fluctuates instantaneously due to fading or the like, and the reception input data at the time of detection of the reception input happens to be high because the reception input data at the time of detection of the reception input is used as a reference for selecting the base station. There is a risk that a base station is selected, and there is a problem that an optimum base station cannot always be selected for the position of a mobile station.

[0004]

According to the present invention, in order to solve the above-mentioned problems, the position information data of the mobile station is transmitted at the time of transmitting the radio wave of the mobile station. Is compared with the communication area information data of each base station stored in the base station, and the optimum base station for the partner mobile station is selected according to the comparison result. As a result, depending on the conditions such as the position of the mobile station, the reception input of the optimum base station happens to be low, so that another base station is not selected, and the selection of the optimum base station for the position of the mobile station is always performed. Will be able to

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to the system diagram of FIG. 1 to 6 in FIG. 1 denote devices of a master station control station, 1 is a control board, 2 is an intra-office telephone connected via an exchange 3, 4 is a mobile system dedicated telephone, and 5 is a line control device. The line control device 5 controls communication restriction, listening, interruption, and the like, and transmits and receives signals to and from the mobile station 9 via the relay control device 7 and the base station wireless device 8 by operation from the control console 1. And the GPS unit 10 of the mobile station 9
And the position information from the GPS information data conversion unit 11 and the base station communication range information storage comparison detection unit 6 in the line control device 5.
Has a function of selecting a base station to be connected according to the comparison result, and connects the office telephone and the mobile telephone 9 via the transit exchange 3.

The outline of the operation of this embodiment will be described below, taking as an example a case where a mobile station is called from a telephone in a control station. When the control station internal telephone 2 dials the mobile station 9 call, a signal is exchanged with the line control device 5 via the exchange 3, and the line control device 5
, A signal for calling the mobile station 9 is sequentially transmitted from the base station 8. When the mobile station 9 determines that the call signal from the base station 8 is a local station call, the data conversion section 11 converts the position information of the GPS section 10 into a predetermined format, and transmits the data and a response signal. In the line controller 5 which has received this signal via the base station 8 and the relay controller 7, each base station communication range information memory and the mobile station position comparing and detecting section 6 in the apparatus select an optimum base station, and A response is returned to the telephone set 2, the selection of the optimum base station 8 and the line configuration are performed, and a call signal to the mobile station 9 is transmitted from the optimum base station 8.

With the above control, communication between the intra-office telephone 2 and the mobile station 9 can be performed via the optimal base station 8. In the case of calling the intra-station telephone 2 from the mobile station 9 which is the reverse of the connection operation described above, the line control device transmits position information in addition to the calling signal when calling the mobile station. What is necessary is just to select the optimal base station.

[0008]

As described above, according to the present invention, selection of a base station required for connection with a mobile station is performed based on a communication range set by each base station set in advance. The most suitable base station can be selected, which is very effective in operation and handling.

[Brief description of the drawings]

FIG. 1 is a system diagram showing an embodiment of the present invention.

[Explanation of symbols]

1 ... control stand, 2 ... telephone in the agency,
3 ... exchanger, 4 ... mobile radio telephone, 5 ... line controller, 7 ... relay controller, 6 ... base station communication range information memory and mobile station position comparison detector, 8 ... base station radio
9: mobile station radio apparatus, 10: mobile station GPS unit,
11: Mobile station GPS data converter.

Claims (1)

[Claims] 1. A mobile radio communication system comprising a master station, a plurality of base stations, and a mobile station, wherein the mobile station transmits location information of the mobile station to the master station, and the master station transmits the location information to the master station in advance. The mobile station compares the communication area information data of each base station stored in the master station apparatus with one of the plurality of base stations, and determines one of the plurality of base stations that is optimal for connecting the mobile station to the communication line. A base station selection method in a mobile radio communication system, wherein the base station selection method is automatically selected.