Beidou data lost message retransmission method and system

A Beidou and data technology, applied in the field of communication, can solve the problems that wireless communication channels are susceptible to external environment interference, data message loss or bit errors, etc., to reduce the number of interactions between missing reports and retransmissions, improve efficiency, reduce network overhead and The effect of data transmission delay

Inactive Publication Date: 2017-02-22
FUJIAN XINGHAI COMM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Beidou satellite communication belongs to wireless communication, and the wireless communication channel is easily disturbed by the external environment, so that the data transmission between the terminals will inevitably have data message loss or bit error

Method used

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  • Beidou data lost message retransmission method and system
  • Beidou data lost message retransmission method and system
  • Beidou data lost message retransmission method and system

Examples

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Embodiment 1

[0043] Please refer to Figure 1 to Figure 3 , Embodiment 1 of the present invention is: a method for retransmitting Beidou data missing report, including the following content:

[0044] First, the Beidou sending terminal splits and encapsulates the original long message data to be sent according to the Beidou short message communication protocol, and converts it into a set of standard Beidou short message data. Each Beidou short message data has a limited number of bytes to send. After deducting the header and tail lengths of the protocol encapsulation, a short message data can only effectively send content with a length of about 70 bytes. In this embodiment, the length of 70 bytes is used for The original long message data is segmented, and each segment of data corresponds to a data packet, that is, a Beidou short message data packet. The length of the last piece of data can be less than 70, that is, the last short message data packet can be less than 70 bytes. In addition...

Embodiment 2

[0050] Please refer to Figure 4 , Embodiment 2 of the present invention corresponds to the method of Embodiment 1, and is a Beidou data missing report retransmission system, including: a Beidou sending terminal, a Beidou satellite, and a Beidou receiving terminal.

[0051] The Beidou sending terminal is used to split and encapsulate the original long message data to be sent according to the Beidou short message communication protocol, convert it into short message data, and record the original sending time, total number of packets, Packet sequence number and check code, and then send the information together with the short message data to the Beidou satellite receiving terminal through the Beidou satellite. At the same time, the Beidou sending terminal is also used to receive the serial number information and original sending time of the missing short message data, query and extract the corresponding short message data according to the original sending time and resend it.

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Abstract

The invention discloses a Beidou data lost message retransmission method and system. The method comprises the following steps: a Beidou receiving terminal, after receiving short message data, analyzing and verifying the data and sending sequence number information of all lost messages and original sending time of the group of short message data back to a Beidou sending terminal; and the Beidou sending terminal, after receiving a retransmission request, according to the original sending time, querying a corresponding Beidou short message group from a sending record, according to sequence numbers of all lost short message data, extracting the corresponding short message data, and resending the short message data to the Beidou receiving terminal through a Beidou satellite. According to the invention, the Beidou receiving terminal, according to the loss condition of the short message data, sends the sequence number information and the original sending time of all the lost short message data at a time, such that the lost message retransmission reaction frequency between the Beidou sending terminal and the Beidou receiving terminal can be effectively reduced, the generated network cost and the data transmission time delay are effectively reduced, and the data transmission efficiency is substantially improved.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method and system for retransmitting Beidou data missing reports. Background technique [0002] The Beidou satellite communication system provides users with short message communication functions. Each short message can send a limited number of bytes. Therefore, a long message needs to be split into multiple short message data before it can be sent by Beidou. The terminal sends to the Beidou receiving terminal one by one. The Beidou receiving terminal can splicing and restoring the original long message data only after receiving all the short message data. [0003] Beidou satellite communication belongs to wireless communication, and the wireless communication channel is easily disturbed by the external environment, so that the data transmission between terminals will inevitably have data message loss or bit error. The traditional processing method is to confirm the re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/16H04L1/18
CPCH04L1/1607H04L1/18
Inventor 余丽香林峰李小霞陈孟锬邓建阳
Owner FUJIAN XINGHAI COMM TECH
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