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Encoding method for transmitting GPS data

A technology of GPS data and encoding method, applied in the field of encoding, can solve the problems of low data transmission rate, low transmission reliability, high data transmission cost, etc., and achieve the effect of improving reliability

Inactive Publication Date: 2009-09-09
CENTURY COMM TECH SHENZHEN
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a coding method for transmitting GPS data, aiming to solve the problem of low transmission reliability, low data transmission rate and low data transmission cost for the data encoded by the common GPS data coding method in the prior art. high problem

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  • Encoding method for transmitting GPS data

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Embodiment Construction

[0022] A kind of encoding method for transmitting GPS data in this specific embodiment mainly includes two steps:

[0023] a) The defined BCDG code, including 0 to 9 numerical characters in the BCD code and the control characters defined by the six states A to F other than the BCD code, the control characters are empty characters, the first spare character, and positive values character, minus character, second alternate character, and start-stop character;

[0024] b) Coding the satellite transmission data coded according to BCDG according to coding rules.

[0025] The user's satellite positioning terminal sends the data transmitted by the satellite to the data processing center through the wireless transmission channel after the data transmitted by the satellite is processed by the coding definition and coding rules of the specific embodiment, and the data processing center uses the coding rules of the specific embodiment to convert the data The data is returned to the orig...

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Abstract

The invention provides an encoding method for transmitting GPS data, which includes the following steps: defined BCDG codes include 0 to 9 numeral-value characters in BCD codes and control characters defined by six states from A to F outside BCD codes, and the control characters are null characters, first backup characters, positive value characters, negative value characters, second backup characters and start-stop characters. Transmission satellite data encoded according to BCDG is encoded according to the encoding rule. Because of adopting the encoding of BCDG and the corresponding encoding rule, the encoding method for transmitting GPS data can improve the reliability and the velocity of data transmission and reduce the cost of data transmission.

Description

technical field [0001] The present invention relates to the field of coding methods, in particular to a coding method for transmitting GPS data. Background technique [0002] At present, the GPS data communication system is generally used to send satellite positioning data back to the service center. First, the data is sent back to the service center and encoded using the traditional GPS data encoding method, and then each group of positioning information is grouped If it is not processed, it will be sent back to the service center, which is about 100 bytes each time. If a sampling point is every 5 seconds, it will cost about 60 megabytes per month. According to the current charging standard of the mobile company, the user's data The cost of transmission is tens of yuan, and the cost is relatively high. Due to the low data transmission reliability, low data transmission rate and high data transmission cost in the wireless communication system, this application cannot be pop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00
Inventor 刘广邱侠
Owner CENTURY COMM TECH SHENZHEN
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