JP5319257B2 - Mobile communication equipment inspection system - Google Patents

Description

The present invention relates to a mobile communication equipment inspection system , and more particularly to a technique for evaluating line quality of a mobile communication equipment by inspecting a call quality of a mobile station.

  One train operation system is called railway radio. This railway radio exchanges various instructions and communications between the train operation management center and the train. However, there may be a section in the train operation section where the line quality of the railroad radio deteriorates due to a change in the terrain or buildings around the track, or a change in the track itself.

The strength of the electric field strength is a powerful material for determining the quality of call quality. For example, in the invention described in Patent Document 1, the distance traveled by the moving body is obtained from the axle pulse signal according to the traveling of the moving body, and the electric field strength of the radio wave having a predetermined frequency transmitted to the moving body is obtained. By measuring and recording the electric field strength according to the moving distance, data recording the strength of the electric field strength at each point is created. However, this technique is intended to easily detect a section where the electric field strength is weak with high accuracy, and is different from the present invention.
JP 2001-281288 A

  As described above, conventionally, there has been a method of measuring the accurate position information of a mobile station and the electric field strength at that position as a method for evaluating the channel quality of mobile communication (for example, Patent Document 1). However, the line quality evaluation method based on the electric field strength has a problem that the line quality deteriorated by the interference signal cannot be accurately evaluated. For this reason, it is necessary to perform subjective evaluation by listening to the received voice separately from the electric field strength. However, since this subjective evaluation is manual, there is not only ambiguity by the evaluator, but also when the evaluator evaluates while moving, the evaluation position cannot be accurately grasped and associated with the evaluation value.

  Therefore, in view of such a problem, the present invention relates to a mobile station in which call quality of a mobile station is related to accurate evaluation position information by measuring with a measuring instrument based on movement information of the mobile station, and ambiguity is removed. The purpose is to be able to provide line quality information of the body communication equipment.

  In order to achieve the above object, the present invention has the following features.

A mobile communication facility inspection system provided by the present invention is a mobile communication facility inspection system including a mobile communication facility inspection device and an analysis device, and the mobile communication facility inspection device moves on a line. A line quality measuring apparatus installed in a mobile body, comprising: a position information acquisition unit that acquires position information of the mobile body; and a measurement that receives a radio wave and measures a signal-to-noise and distortion ratio (SINAD) of a demodulated signal And a recording unit that associates the position information acquired by the position information acquisition unit with the measured SINAD information and saves the file in a file, and the analysis device uses the file stored by the recording unit from the file An analysis means for outputting a SINAD distribution map and an evaluation value for each position of the mobile body and performing analysis based on data collected by the mobile communication equipment inspection device; and An evaluation knowledge base that collects evaluation values that have been output and evaluated in multiple stages, and the analysis means uses the measured SINAD information stored in a file by the recording means as the evaluation knowledge base. Based on the above, it is converted into a multistage evaluation value .

  According to the present invention, the line quality information measured by the measuring device based on the movement information of the mobile station is recorded, so that it is related to the accurate evaluation position information and the ambiguity is removed from the line quality of the mobile communication equipment. Can provide evaluation.

  Preferred embodiments of the present invention will be described below with reference to the drawings. In addition, the same code | symbol is attached | subjected about the same site | part in each drawing, and it does not demonstrate repeatedly.

  Referring to the block diagram of FIG. 1, a schematic configuration of the present embodiment is shown. The mobile communication equipment inspection device according to the present embodiment includes a line quality measurement device (hereinafter referred to as “on-vehicle measurement device”) 100 and a ground analysis device 200 mounted on a vehicle, and is measured by the on-vehicle measurement device 100. Is analyzed by the ground analysis device 200 and an analysis result output 300 is output. Hereinafter, the internal configuration of each apparatus will be described.

  The on-vehicle measuring apparatus 100 includes an antenna 101, a receiver 102, a distortion meter 103, an on-vehicle PC (Personal Computer) 104, a distributor 105, a position information calculating unit 106, a speed generator 107, and the like, and SINAD information 108 and The position information 109 is saved in a file.

  The antenna 101 and the receiver 102 serve to receive railway radio waves to be measured. The distortion meter 103 measures the SINAD information 108 of the received signal. The measurement of the SINAD information 108 by the distortion meter 103 is continuously performed and is input to the on-board PC 104. In addition, the measurement value is stored for each fixed movement distance.

  The position information calculation unit 106 calculates the position information 109 on the route by detecting the moving distance based on the axle pulse sent from the speed generator 107 and the ATS ground element associated with the position information, Input to the upper PC 104.

  On the other hand, the on-board PC 104 calculates the moving distance based on the axle pulse sent from the speed generator 107, and the SINAD information 108 of the point measured by the distortion meter 103 at the point moved by a predetermined distance. Then, the location information 109 of the point input by the location information calculation unit 106 is stored in a file. At this time, the SINAD information 108 and the position information 109 are stored in association with each other.

  The ground analysis device 200 includes a ground PC (Personal Computer) 201 and an evaluation knowledge base 202. The ground PC 201 has a function of analyzing the collected data based on the data collected by the on-vehicle measuring apparatus 100. The evaluation knowledge base 202 is a knowledge database in which evaluation values of multi-stage evaluations collected in the past by traveling along the route to be inspected are stored.

  Next, the overall operation of the wireless communication facility inspection apparatus according to this embodiment will be described. In the wireless communication facility inspection system according to the present embodiment, first, a train on which the on-board measuring device 100 is loaded travels on one route to be inspected, and the on-board measuring device 100 collects data on the route. . Next, analysis is performed based on the data collected by the ground analysis device 200, and an analysis result output 300 is output. Hereinafter, the operation of each apparatus will be described.

  FIG. 2 is a flowchart showing the operation of the on-vehicle measuring apparatus 100. In the on-vehicle measuring apparatus 100, first, the antenna 101 and the receiver 102 receive the radio waves of the railway radio to be measured (step S201). Next, the received signal is input to the distortion meter 103 (step S202).

  The distortion meter 103 constantly measures SINAD. In addition, the position information calculation unit 106 calculates position information. Therefore, the on-board PC 104 takes in the SINAD from the distortion meter 103 for each number of pulses corresponding to a predetermined movement distance from the pulse signal obtained from the distributor 105, and creates a file (step S203). The created file is SINAD information 108. At the same time, the position information is fetched from the position information calculation unit 106, associated with the SINAD information 108, and stored in a file (step S204). The saved file is the position information 109.

  FIG. 3 is a flowchart showing the operation of the ground analysis apparatus 200. In the ground analysis device 200, first, data collected by the on-vehicle measurement device 100 is collected on the ground PC 201. The SINAD information 108 and the position information 109 associated therewith are collected at regular intervals. The ground PC 201 creates a SINAD distribution map using the collected data (step S301).

  Next, the ground PC 201 determines from the collected data that the line quality has a problem when the SINAD falls below a predetermined threshold value, and displays the SINAD and position information.

  Furthermore, the ground PC 201 can output an evaluation value of multi-stage evaluation at a specific position of the train using the evaluation knowledge base 202 created from past measurements (step S303).

  According to the present embodiment, the call quality of a mobile station can be associated with accurate evaluation position information by measuring the position information calculation unit 106 based on the movement information of the mobile station. Further, as compared with the evaluation knowledge base 202, it is possible to automatically output multi-stage evaluations and provide an evaluation of the line quality of the mobile communication equipment with manual ambiguity removed.

(Other embodiments)
In the above-described embodiment, the ground analysis device 200 is provided and a detailed inspection result is output. However, the reception quality of the mobile station can be changed only by the on-board measurement device 100 without the ground analysis device 200. It is possible to achieve the problem of providing an evaluation of a mobile communication facility that is related to accurate evaluation position information by measuring with a measuring instrument based on the movement information of the station and that removes ambiguity.

  As a specific example, in the crew radio, a carrier wave modulated by a non-call space-time signal (2280 Hz) is transmitted from the base station, so the SINAD of the sky signal may be measured. In railway radio equipment, noise is the main cause of the decrease in SINAD, so an unmodulated signal may be received for the evaluation of the line quality and the noise level demodulated by a noise meter (sohometer) may be used. In train radio, a carrier wave is transmitted only from the base station during a call and does not use a blank signal for controlling the mobile station. A modulated carrier wave may be transmitted.

  In this embodiment, the position information calculation unit 106 detects the movement distance based on the axle pulse sent from the speed generator 107 and the ATS ground element associated with the position information, thereby detecting the position on the route. Although the information is calculated, the position information 109 may use GPS.

  The preferred embodiment of the present invention has been described above. However, the present invention is not limited to the railroad radio, and is within the scope not departing from the gist as a means for obtaining information necessary for base station installation over the entire mobile communication. Various modifications are possible.

It is a block diagram which shows the structure of the radio | wireless communication equipment inspection system which concerns on suitable embodiment of this invention. It is a flowchart which shows operation | movement of the on-vehicle measuring device of the radio | wireless communication equipment inspection system which concerns on suitable embodiment of this invention. It is a flowchart which shows operation | movement of the ground analyzer of the radio | wireless communication equipment inspection system which concerns on suitable embodiment of this invention.

Explanation of symbols

100 On-vehicle measuring device 200 Ground analysis device 300 Analysis result output 101 Antenna 102 Receiver 103 Strain meter 104 On-vehicle PC
DESCRIPTION OF SYMBOLS 105 Distributor 105a Position information acquisition means 106 Position information calculation part 107 Speed generator 108 SINAD information 109 Position information 201 Ground PC
202 Knowledge Base

Claims (5)

A mobile communication facility inspection system including a mobile communication facility inspection device and an analysis device,
The mobile communication equipment inspection device is:
A line quality measuring device installed on a moving body moving on a line,
Position information acquisition means for acquiring position information of the moving body;
Measuring means for receiving radio waves and measuring the signal-to-noise and distortion ratio (SINAD) of the demodulated signal;
A recording means for associating the positional information acquired by the positional information acquisition means with the measured SINAD information and storing them in a file ;
The analysis device includes:
Analysis means for outputting a SINAD distribution map for each position of the mobile body, an evaluation value from the file stored by the recording means, and performing analysis based on the data collected by the mobile communication equipment inspection device;
An evaluation knowledge base that collects evaluation values evaluated in multiple stages, which are evaluation values output in the past by the analysis means,
The mobile communication equipment inspection system , wherein the analysis means converts the measured SINAD information stored in the file by the recording means into a multi-stage evaluation value based on the evaluation knowledge base . 2. The mobile communication equipment inspection system according to claim 1, wherein the position information acquisition means acquires the position information of the mobile body using an axle pulse output of the speed generator and an ATS detector output. The mobile communication equipment inspection system according to claim 1 or 2, wherein the position information acquisition means acquires position information of the mobile body using GPS output. It said measuring means, also the noise level of the received radio wave of the demodulated signal is measured as the channel quality information,
Said recording means, said noise levels, mobile communications equipment inspection system according to any one of claims 1 to 3, characterized in that to save the file in association with the position information of the round wire quality information.   The mobile communication equipment inspection system according to any one of claims 1 to 4, wherein the measurement means receives a non-call space-time signal in a crewmember radio of a train as the radio wave.

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