JPH01137841A - Data processing procedure for information communication equipment between vehicles on road - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a road-to-vehicle information communication device, and particularly relates to a data processing means suitable for data conversion processing of information received a limited number of times.

[Conventional technology]

For example, conventional devices are equipped with NMO in order to comply with the HDLC communication standard as described in Japanese Patent Application Laid-Open No. 61-230532.
8 dedicated LSI was used. However, this LSI
It was expensive and had relatively large power consumption.

[Problem that the invention seeks to solve]

The above-mentioned conventional technology does not give consideration to the power saving of the receiving device, and has problems of high cost and high power consumption.

An object of the present invention is to stably receive information using microcomputer software without using a dedicated LSI. However, due to software processing, processing time is required from the start of reception to the end of checking the data, and when an error is detected in the data, it is possible that the data has passed through the information communication area.

[Means for solving problems]

The above purpose is to store as many times as possible in the information receiving area, then perform data conversion processing, and if a data error is detected, perform the same processing with other stored data to avoid missing normal data. This is achieved by doing so.

[Effect]

When passing through the information receiving area, it operates to store as much data as the memory capacity allows. Data conversion is performed after passing through the reception area or when the memory is full. As a result, multiple pieces of received data will be stored, so even if an error is detected in one of the data, other data can be cited, so if one data is incorrect. When you find out something, there's no chance that you won't be able to get the next piece of information.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG.

Information is continuously and repeatedly transmitted from a transmitting device 1 installed on the road, and transmitted by an antenna 3 and a receiving device 4 of a vehicle 10 passing within a receiving area 5. FIG. 2 shows transmitted and received information frames and processing on the receiving side. Reception is started asynchronously with respect to frames of information 20 that are repeatedly transmitted, and information 21 that is established as a frame is obtained. Conventional receiving side processing, similar to the HDLC standard LSI, receives one frame of information 21 by a reception process 22a, then performs HDLC standard data conversion 23a such as zero deletion, generates a CRC code, and performs an error check 24a. Let's do it. However, since the above is executed by software, the error check 24a may be delayed due to the processing time.
If an error occurs and this receiver is out of the communication area, it will no longer be possible to respond. The present invention
As much information as can be obtained is recorded in the memory by the reception processing of 22b and 22c, and after the memory becomes full or the data passes through the reception area 5, data conversion 23b and error check 24 are performed.
Start processing b. FIG. 3 shows the processing flow on the receiving side. Before reaching the receiving area 5, it is determined that there is a received signal 32 and is in an idle state waiting for reception. Once the data is received, a recording 33 of the data is performed and a received signal 33 is recorded.
4 and memory FULL 35, data recording 33 continues until the received signal disappears or the memory becomes FULL.
is repeated. Thereafter, the recorded data is subjected to zero-delete HDLC standard data conversion 36 and error check 37 using a CRC code, and if there is an error 38 in the information, the next frame data 39 is indicated and the same process is repeated. If there are no errors, the process ends.

According to this embodiment, error checking of information is repeated until no errors are found for frame data that has been received a limited number of times, thereby avoiding software problems due to processing time delays in data conversion and error checking. effective.

〔Effect of the invention〕

According to the present invention, since it is possible to reliably check for errors in the information obtained when passing through the reception area without using a dedicated LSI of the HDLC standard, the dedicated LSI can be abolished, resulting in cost reduction. .

This has the effect of reducing power consumption.

[Brief explanation of the drawing]

FIG. 1 is a system diagram of a road-to-vehicle information communication device according to an embodiment of the present invention, FIG. 2 is a diagram showing information transmission/reception frames and the processing order on the receiving side, and FIG. 3 is a flowchart of information processing on the receiving side. . DESCRIPTION OF SYMBOLS 1... Transmitting device, 3... Receiving antenna, 4... Receiving device, 10... Vehicle, 20... Sending side information frame, 29... Reception area arrival pre-processing, 30... Processing while passing through the receiving area, 31... Processing after passing through the receiving area.

Claims (1)

[Claims] 1. In an information communication device consisting of a moving vehicle, an information transmitting device installed on the roadside, and an information receiving device mounted on the vehicle,
A data processing procedure for a road-to-vehicle information communication device characterized by storing a large amount of repeatedly transmitted information.