JP2003163954A - Radio circuit connection control system of radio communication system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To eliminate a defect in a conventional train radio communication system that quality of a connection circuit is directly affected by secular level change of a radio apparatus or the like in a base station and level change of a radio section between the base station and a mobile station, so that connection is impossible when connection is wanted, or speech is hard to be heard when a connection is obtained, and normal data transmission is impossible, and to enable always automatic selection of a high quality circuit. <P>SOLUTION: A control station is equipped with a measurement signal generator, a measurement signal measuring apparatus, and a circuit connection control unit. The mobile station is equipped with a measurement signal turning-back control unit for turning back a measurement signal to the control station when the measurement signal transmitted from the control station is received. The control station measures a plurality of circuits between each of the base stations and mobile stations, thereby grasping the state of each of the radio circuits. <P>COPYRIGHT: (C)2003,JPO

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio channel connection control system for a radio communication system such as a train radio communication system. FIG. 2 is a block diagram of a conventional train radio communication system. In the figure, 1 is a control station, 2 is a base station, 3 is a mobile station, a plurality of base stations 2 are connected to the control station 1, and the base station 2 and the mobile station 3 perform wireless communication. In the conventional train radio communication system, there is no line connection control function based on the state of the radio line, and the connection from the control station to the mobile station via the base station is performed regardless of the state of the radio line between the base station and the mobile station. I have. [0003] In the above-mentioned conventional train radio communication system, the aging level fluctuation of the radio equipment in the base station and the level fluctuation in the radio section between the base station and the mobile station are not changed. Since the quality is affected, there are drawbacks such as an inability to connect even if an attempt is made to connect, a difficulty in listening to a call even if the connection is possible, and a failure in normal data transmission. An object of the present invention is to eliminate these drawbacks and to automatically select and use a high-quality line at all times. [0004] In order to achieve the above object, the present invention provides a control station in which a measurement signal generator, a measurement signal measurement device, and a control of a line connection with a mobile station are performed based on a value of a measurement signal. The mobile station receives a measurement signal sent from the control station, and provides a measurement signal return control unit that returns the measurement signal to the control station. By measuring a plurality of lines between mobile stations, the state of each wireless line can be ascertained. An embodiment of the present invention will be described below with reference to FIG. 1 is a control station, 2 is a base station, 3 is a mobile station,
4 is a measurement signal generator connected to the transmission path of the control station, 5 is a measurement signal measurement apparatus connected to the reception path of the control station, and 6 is a circuit of the control unit which receives the measurement information of the measurement signal measurement apparatus 5 and receives the measurement information. A line connection control unit 7 for controlling connection, a measurement signal return control unit 7 for returning the reception path of the mobile station 3 to a transmission path, and a measurement signal return control unit 7 for connecting the measurement signal detector 8 to the reception path When the signal is received, the relay R is operated to connect the receiving channel to the transmitting channel. In this figure, a control station 1 sends a measurement signal from a measurement signal generator 4 to a transmission path, and sends it to a base station 2 from a control unit. The base station 2 transmits a measurement signal to the mobile station 3, and the mobile station 3 transmits the measurement signal to a receiving path via a wireless device and a control unit.
In the mobile station 3, when the measurement signal from the control station 1 is detected by the measurement signal detector 8 of the measurement signal return control unit 7, the relay R operates to connect the reception path to the transmission path. The measurement signal return control unit 7 returns the measurement signal to the transmission path, and the mobile station 3 returns the measurement signal to the base station 2 via the control unit and the radio. The measurement signal received by the base station 2 is transmitted to the receiving channel via the control unit of the control station 1. The measurement signal measuring device 5 measures the level of the measurement signal returned from the mobile station 3 and sends the measurement information to the line connection control section 6. The line connection control unit 6 stores the measurement result for each of a plurality of (for example, 40) wireless lines for each base station. The result is read out, and a line having a large measurement signal value is automatically selected from a plurality of lines in the base station and used for connection with the mobile station. The above-described measurement is performed once a day, for example, before the train starts. According to the present invention, only good quality lines can be used, so that good communication and data transmission can always be performed.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a configuration of an embodiment of the present invention. FIG. 2 is a block diagram showing a configuration example of a conventional train radio communication system. 2: base station, 3: mobile station, 4: measurement signal generator, 5: measurement signal measurement device, 6: line connection controller, 7:
Measurement signal return control unit, 8: Measurement signal detector

Claims (1)

Claims 1. A control station to which a plurality of base stations are connected, and a plurality of mobile stations that perform wireless communication between the plurality of base stations using a plurality of wireless lines. In a wireless communication system, a control station is provided with a measurement signal generator, a measurement signal measurement device, and a line connection controller for controlling a line connection with a mobile station based on a value of a measurement signal, and the mobile station transmits a signal from the control station. When the received measurement signal is received, a measurement signal return control unit that returns the measurement signal to the control station is provided. By measuring the value of a signal and adding a priority to a radio line having a higher measurement signal value and storing it, a connection is established from a higher priority line when connecting to a mobile station. System wireless line connection system Control method.