JPH1094043A - Radio system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radio system that selects an optimum radio base station by applying time division reply control to a base station radio section depending on the reception electric field strength without the use of ground installation such as a cable in the radio system consisting of a simplex radio mobile station and a plurality of radio base stations among which radio channel is connected where data transmission is conducted through access from a radio mobile station. SOLUTION: Reception electric field strength discrimination sections 5, 8 discriminate a reception electric field strength level from a radio mobile station 3 received by radio sections 4, 7 in radio base station equipments 1, 2 based on a criterion set in advance, and control sections 6,9 applies time division reply control to the radio sections 4, 7 based on the result of discrimination and connect a channel between a base station and a radio mobile station that provides a best reception state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio system for transmitting data by accessing a base station from a mobile station.

[0002]

2. Description of the Related Art Conventionally, when a plurality of base station apparatuses and a radio mobile station are connected to a line, comparison has been made by comparing electric field strength, S / N, and the like. FIG. 2 shows an example of a conventional wireless system. In FIG. 2, reference numerals 1 and 2 denote radio base station apparatuses whose priorities are determined in advance, 3 denotes a radio mobile station,
7 is a radio unit of each radio base station, 5 and 8 are reception electric field strength judgment units for judging the reception electric field intensity based on preset judgment values, and 6 and 9 are judgments made by the reception electric field strength judgment units 5 and 8. Based on the results, a received electric field strength determination unit that controls the radio units 4 and 7 is a remote control device that controls connection of the radio base station devices 1 and 11, and 11 and 12 connect each base station and the remote control device. Indicates an approach line.

Next, the configuration of a line according to the prior art shown in FIG. 2 will be described. The conventional wireless system shown in FIG. 2 has a configuration in which electric field strength information to be compared is transmitted by a cable, and a radio wave transmitted from the mobile station 3 is transmitted through the radio units 4 and 7 of each base station. It is sent to the received electric field strength determination units 5 and 8. The reception electric field strength judgment sections 5 and 8 make a judgment on the electric field strength of the own station based on a predetermined judgment value, and transmit the result to the remote control device 10 through the approach lines 11 and 12. The remote control device 10 compares the transmitted electric field strength information and selects a base station to which the line is connected.
2 and the base station in a better reception state sends out a signal for acknowledgment and connects the line. This conventional method can be used regardless of the wireless system, but requires a cable for transmitting the electric field strength between base stations.

[0004]

The above-mentioned prior art has a drawback that a cable is required for transmitting the electric field strength between base stations. The present invention eliminates the above drawbacks, and by configuring a wireless line between base stations,
An object of the present invention is to provide a method of transmitting a determination result of the electric field strength through a wireless line, removing a wired cable, transmitting a signal for confirming reception by a base station having a better reception state, and connecting the line. .

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a radio base station apparatus, which receives a radio field received by a radio section from a radio mobile station and uses a predetermined judgment value. And time-division transmission is performed with another base station via a wireless line based on the above determination result, so that the field intensity information can be exchanged by the simplex method.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIG. In FIG. 1, reference numerals 1 and 2 denote wireless base stations having priority levels that can form a wireless line with each other, and 3 denotes a wireless mobile station that can form a wireless line with the wireless base stations 1 and 2. In the radio base station, reference numerals 4 and 7 denote radio units for transmitting and receiving radio waves, and reference numerals 5 and 8 denote electric field strength judgment units for judging received electric field strengths from the radio mobile station received by the radio units in accordance with predetermined judgment values. , 6, and 9 denote control units for performing response control of the radio units 4 and 7 in a time-division manner based on the result determined by the electric field strength determination unit. Hereinafter, this operation will be described. Radio waves transmitted from the wireless mobile station 3 are received by the wireless units 4 and 7 of each of the base stations 1 and 2. The radio units 4 and 7 transmit the received electric field strength to the electric field strength judgment units 5 and 8 and determine whether the electric field strength is “H” level or “M” level based on a preset judgment value. "L"
It is determined whether the level is the level and transmitted to the control units 6 and 9. The control units 6 and 9 control the radio units according to the sequence shown in FIG.

Next, the operation sequence shown in FIG. 3 will be described. Here, the base station having the higher priority is station A, and the base station having the lower priority is station B. In performing the time division control, a sufficiently short fixed time is used as a unit, and is called a slot. In the first slot, when the B station is at the “H” level, the B station transmits a reply to the wireless mobile station. In this case, since the station A can receive the reply transmission sent to the wireless mobile station in the same manner,
The station can detect that the line is connected, and waits until receiving a request transmission from the next wireless mobile station. If the station B is at the “M” or “L” level,
In both stations B, this slot is on standby. In the second slot, when the A station is at the “M” or “H” level, the A station transmits a reply to the wireless mobile station. In this case, since the station B can receive the reply transmission sent to the wireless mobile station in the same manner, it can detect that the station A connects the line and receive the next request transmission from the wireless mobile station. Wait until you do. If the A station is at the “L” level, both the A and B stations wait in this slot.

In the third slot, if the B station is at the "M" level, the B station transmits a reply to the radio mobile station. In this case, since the station A can receive the reply transmission sent to the wireless mobile station in the same manner, it can detect that the station B connects the line, and the request from the next wireless mobile station can be received. Wait for the transmission to be received. If the B station is at the “L” level, the A station waits for this slot, and the B station waits until receiving the next request transmission from the wireless mobile station. In the fourth slot, the station A sends a reply to the wireless mobile station, and the line is connected between the station A and the wireless mobile station. By controlling the four short time slots in accordance with the above procedure, the base station and the radio mobile station having a good reception state can be obtained by the simplex method without connecting a wired cable and only by changing the equipment in the base station. Can provide a method of connecting a line to and from the terminal.

[0009]

As described above, according to the present invention, a ground station such as a wired cable is not required, and in a simplex system, only a radio base station is used, and a base station and a radio mobile station having a better reception state are used. A wireless system for connecting a line between the two can be provided.

[Brief description of the drawings]

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

FIG. 2 is a diagram showing a configuration example of a conventional wireless system.

FIG. 3 is a flowchart illustrating an example of a response control procedure according to an embodiment of the present invention.

[Explanation of symbols]

1 ... A zone base station device 2 ... B zone base station device 3 ... Wireless mobile station 4
7: Radio section, 5, 8: Received electric field strength judgment section, 9
... Control unit, 10 ... Remote control unit, 11
... A zone approach line, 12 ... B zone approach line.

Claims (1)

[Claims] 1. A wireless system comprising a mobile station and a plurality of base stations connected to the mobile station via a wireless line, wherein the mobile station accesses the base station and performs data transmission. A radio unit for transmitting and receiving radio waves, and a reception field strength determination unit that determines the reception field strength level of the mobile station received by the radio unit based on a predetermined determination value, Based on the above, the base station radio section performs response control in a time division manner so that a line is connected between the base station having the best reception state and the radio mobile station, thereby selectively controlling the radio base station. Wireless system.