JPH10190558A - Method for displaying mobile station reception electric field of train radio system and its display control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To permit a maintainer to easily grasp the situation of a mobile station by screen-displaying the train number of the mobile station, mobile station mounting position information, running direction information and the name and number of a reception base station by means of a polling response signal from a train mounting mobile station. SOLUTION: When response is reported from the plural base stations by the same reception electric field value as the one as against polling from a center device 3 to a certain mobile station (7-1 to 7-Q) with the plural base stations 4-1 top 6-L, an only one station successively transmits the succeeding poling signal from the remotest base station, the response electric field value is held so as to be compared with a preceding time result, the base station receiving the actual mobile station is limited and information between the applying mobile station and the base station is displayed in the display part 2 of a maintenance table 1 in the center device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile station reception electric field display of a train radio system.

[0002]

2. Description of the Related Art Conventionally, this kind of train radio system is composed of a plurality of base stations connected in series from a central unit to an up / down line and a plurality of mobile stations respectively mounted on a plurality of trains. Of a plurality of base stations receiving signals transmitted from each mobile station, a wireless device of a base station closest to the central unit is connected to an uplink to the central unit so that a call can be made (Japanese Patent Publication No. 2-59656).

[0003]

In the above-mentioned conventional train radio system, when a signal transmitted from a mobile station is received by a plurality of base stations, the base station closest to the central unit side unconditionally corresponds to the signal. It is selected as the receiving base station of the mobile station and is connected to the central unit via a line. However, since a signal transmitted from a certain mobile station is received at a plurality of base stations connected in series from the central unit to the uplink and the downlink with an arbitrary reception electric field value corresponding to the electromagnetic environment, the maximum reception There may be two or more base stations receiving electric field values.
In this case, in the conventional method, the wireless device of the base station closest to the central device is unconditionally connected to the uplink to the central device, so that the corresponding mobile station is actually the closest distance to the base station to which the line is connected. And the location confirmation of the mobile station on the central device side becomes inaccurate.

[0004] In addition, a plurality of base stations connected in series to the mobile station from the central unit to base stations other than the base station connected to the mobile station are connected to the mobile station by the central unit. Since the connection control is blocked, the system maintainer on the central unit side cannot easily grasp the reception status of the plurality of base stations, the train number of the mobile station, the mobile station mounting position, the traveling direction, and the like.

[0005]

According to the present invention, a mobile station reception electric field display system for a train radio system comprises a plurality of mobile stations mounted on a plurality of trains and a plurality of radio zones corresponding to uplink and downlink lines. A plurality of base stations connected to the series and performing radio transmission and reception with each of the plurality of mobile stations in the radio zone under its jurisdiction, and the plurality of base stations accommodating uplink and downlink for each of the plurality of radio zones. A central unit that communicates with each of the plurality of mobile stations and manages and displays information by communicating with each of the plurality of mobile stations via the central unit, the plurality of base stations receiving radio signals from the mobile stations. Electric field values are collected by polling, and when the received electric field value of the same mobile station is the same at a plurality of base stations, a method of searching for the base station closest to the corresponding mobile station actually is used. Comprising the reception base station name on the display unit of the maintenance console received field value, the train number of the corresponding mobile station, the mobile station mounting position information, and means for displaying the running direction information.

[0006] The method for controlling the display of received electric fields in a mobile station of a train radio system according to the present invention is characterized in that a plurality of mobile stations mounted on a plurality of trains are connected in series for each of uplink and downlink lines corresponding to a plurality of radio zones. A plurality of base stations for performing radio transmission and reception with each of the plurality of mobile stations in the radio zone under its jurisdiction; and the plurality of base stations accommodating uplink / downlink lines for each of the plurality of radio zones and via the plurality of base stations. In a train radio system including a central unit that communicates with each of the mobile stations, a response from the central unit to a certain mobile station via the plurality of base stations is the same as a response from the central units to a polling operation. When notified by the received electric field value, the next polling signal is transmitted only from the farthest base station from the central unit among the plurality of base stations, and the response electric field value is transmitted. Then, a polling signal is transmitted only from the distant base station, and the process of holding the response electric field value and comparing the response electric field value with the former is sequentially repeated by the number of the same electric field value receiving base stations, thereby realizing the actual mobile station. Narrowing down the base stations that are receiving and displaying the relevant mobile stations and base stations on the maintenance console of the central unit.

According to the present invention, a mobile station has a central unit,
When transmitted in response to a polling signal via a base station, the transmitted signal is received from one of a plurality of base stations connected in series to the uplink and downlink from the central unit, and the reception electric field of the corresponding mobile station is received. If the value is the same for a plurality of base stations, the response electric field value is held together with the base station number.
Next, from among the base stations having the same received electric field value, a polling signal is sequentially transmitted one by one from the base station farthest from the central unit to the corresponding mobile station, and the response electric field value is held, and Compare with the electric field value of the base station. This processing is performed for the number of base stations received at the same electric field value, and one base station receiving the polling response signal from the actual mobile station is narrowed down to correspond to the display unit of the maintenance console connected to the central unit. The base station name and number, the mobile station and the train number of the mobile station, the mobile station mounting position information, and the traveling direction information are displayed. This allows
The system maintenance person can easily grasp the information of the receiving base station and the mobile station of the mobile station mounted on the train.

[0008]

Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a system configuration diagram showing an embodiment of the present invention. In FIG. 1, the train radio system of the present embodiment includes a plurality of base stations 4-1,..., 4-N, 5-1,.
, 6-L, mobile stations 7-1,..., 7-Q mounted on a plurality of trains, a plurality of zones 4,
5, 6, a maintenance console 1, a display unit 2, and a central device 3.

Next, the operation of the present invention will be described with reference to the sequence diagram of FIG. 2 (note that in FIG. 2, only one base station is described for the sake of explanation, but actually, , There are multiple base stations connected to the series). From the central unit 3 to a plurality of base stations 4-1 to 4-N, 5-1 to 5
-M, 6-1 to 6-L (hereinafter abbreviated as 4-1 to 6-L)
, Polling is performed for a plurality of mobile stations 7-1 to 7-Q that move in the up and down directions between the plurality of zones 4 to 6. FIG. 3 shows a configuration example of a signal transmitted from the central unit to the base station. In this signal, the number of base stations indicates the number of base stations connected to the approach line of the base station.

Each of the mobile stations 7-1 to 7-1 receiving the polling signal
7-Q transmits its own train number, mobile station mounting position information, traveling direction information, and other information to each of the base stations 4-1 to 6-L as a polling response signal.

Each of the base stations 4-1 to 6-L adds the received electric field value at its own station to the polling response signal and notifies the central unit 3. FIG. 4 shows a configuration example of a signal transmitted from the base station to the central unit.

The central unit 3 sends the information to the display unit 2 of the maintenance console 1 if there is one base station having the highest received electric field value. The display unit 2 displays the corresponding train number on the corresponding base station. FIG. 5 shows a screen display example on the display unit 2. In the state of FIG. 5, when an arbitrary mobile station is selected, its electric field value is displayed.

When the same reception electric field value is received from a plurality of base stations, polling is performed only from the base station farthest from the central unit, and the response electric field value is held. Next, polling is performed only from the next distant base station, and the response electric field value is compared with the former. By performing these processes for the number of base stations received at the same reception electric field, the base station where the actual mobile station exists is identified. Thereby, the display of the received electric field value of the mobile station can be performed at the base station where the display is correct.

[0015]

As described above, according to the present invention, a mobile station mounted on a plurality of trains, a plurality of base stations connected in series to uplink and downlink, a plurality of zones, a maintenance console, and a central unit. The polling system collects the received electric field values of mobile stations mounted on running trains, and always displays the base station where the transmitting mobile station actually exists on the display screen of the maintenance console. Can be displayed together with the corresponding mobile station and information held by the mobile station. As a result, the maintenance person of the train radio system can quickly and easily grasp the reception status of the mobile station mounted on the running train at the base station, and also satisfies the train location display function based on a simple base station. be able to.

[Brief description of the drawings]

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

FIG. 2 is a diagram showing a sequence of polling of a mobile station from a central unit.

FIG. 3 is a diagram illustrating a configuration example of a signal transmitted from a central device to a base station.

FIG. 4 is a diagram illustrating a configuration example of a signal transmitted from a base station to a central device.

FIG. 5 is a diagram showing a screen display example of a display unit.

[Explanation of symbols]

 Reference Signs List 1 maintenance console 2 display section of received electric field 3 central unit 4,..., 6 Zone 4-1,..., 4-N ..., 6-L Zone 6 base station 7-1, ..., 7-Q mobile station

Claims (2)

[Claims] 1. A plurality of mobile stations respectively mounted on a plurality of trains, and each of the plurality of mobile stations in a wireless zone which is connected and controlled in series for each of uplink and downlink lines corresponding to a plurality of wireless zones. A plurality of base stations for performing wireless transmission and reception, respectively, and uplink and downlink for each of the plurality of wireless zones, and communicate with each of the plurality of mobile stations via the plurality of base stations to manage and display information. In the train radio system including a central device to perform, in the central device, collecting by polling the received electric field values of radio signals from the mobile station in the plurality of base stations,
If the received electric field value of the same mobile station is the same for a plurality of base stations, means for searching for the base station closest to the actually applicable mobile station, and the received electric field value to the display section of the maintenance console A mobile station reception electric field display method for a train radio system, comprising: means for displaying a name of a reception base station, a train number of a corresponding mobile station, mobile station mounting position information, and traveling direction information. 2. A plurality of mobile stations respectively mounted on a plurality of trains, and each of the plurality of mobile stations in a wireless zone which is connected and controlled in series for each uplink and downlink corresponding to a plurality of wireless zones. A plurality of base stations for performing wireless transmission and reception, respectively, and uplink and downlink for each of the plurality of wireless zones, and communicate with each of the plurality of mobile stations via the plurality of base stations to manage and display information. A mobile station reception electric field display control method in a train radio system including a central device that performs a response to polling from the central device to one mobile station via the plurality of base stations from the plurality of base stations. When notified by the same reception electric field value, the next polling signal is transmitted only from the base station farthest from the central unit among the plurality of base stations, and the response electric field value is transmitted. Then, the polling signal is transmitted only from the next distant base station, and the process of holding the response electric field value and comparing the response electric field value with the former is sequentially repeated for the same electric field value receiving base stations, thereby realizing the actual mobile station. A mobile station reception electric field display control method, characterized by narrowing down a base station that is receiving and displaying the corresponding mobile station and the base station on a maintenance console of the central device.