A balanced protection sliding window bats code transmission method

A sliding window and transmission method technology, applied in the field of space communication, can solve problems such as the inability to guarantee fast and timely data transmission, and achieve the effects of improving the success rate of data recovery, high transmission efficiency, and improved efficiency

Active Publication Date: 2021-10-26
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiency that the redundant transmission in the prior art cannot guarantee the rapid and timely transmission of data. This paper proposes a sliding window BATS code transmission method with balanced protection. Compared with the general window continuous overlapping sliding method, Utilizing the characteristics of higher solvability of small-degree value Batch in BATS code, multiple small-degree value Batches are used to encode and transmit the non-overlapping area of ​​the sliding window, and at the same time, the sliding step is changed to unequal step to realize sliding of the window Balanced protection of data in overlapping areas and non-overlapping areas before and after, so that the contradiction between reliable transmission and timely transmission in space communication can be solved relatively well, and a more efficient transmission mode can be realized

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  • A balanced protection sliding window bats code transmission method
  • A balanced protection sliding window bats code transmission method
  • A balanced protection sliding window bats code transmission method

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[0050]The present invention will be further described in detail below in conjunction with test examples and specific embodiments. However, it should not be understood that the scope of the above subject matter of the present invention is limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0051] There is a concept of batch processing (Batch) in the BATS code encoding and decoding. Assuming that the number of data packets to be encoded is K, the set B=(1,...,K) represents the collection of all data packets, and the collection is divided into n subsets (which may overlap), and the subsets Every set B i After encoding, M encoded data packets are obtained, which is called a batch (Batch). The n batches obtained after encoding are represented as X 1 ,X 2 ,...,X n , each Batch can be expressed as formula (1):

[0052] x i =B i G i (1)

[0053] Among them, let d ...

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Abstract

The invention discloses a balanced protection sliding window coding transmission method, comprising: obtaining the rank distribution of the transmission matrix according to the link condition; obtaining an expected rank according to the rank distribution, and setting the size of each batch coded packet processed in batches greater than the expected rank; according to the rank distribution, obtain the degree distribution of a batch coded packet, and the transmission efficiency corresponding to the degree distribution; set up a fixed-length sending window, and obtain a single window requirement according to the window length and the transmission efficiency The number of coded packets to send; according to the degree distribution, expected rank, window length and the number of coded packets to be sent in the window, the data is sent by combining sliding window and batch coding. Make full use of the concept of BAST code batch processing, use the sliding window for transmission with certain redundancy, improve the success rate of data recovery in the case of high packet loss, and improve the reliability.

Description

technical field [0001] The invention relates to the field of space communication, in particular to a transmission method of a balanced protection sliding window BATS code. Background technique [0002] In human space exploration, the space communication data transmission service has high requirements on the reliability and timeliness of the transmission. Reliable and timely transmission of data such as personnel's physical status, scientific detection data, and control instructions must be guaranteed. However, the long delay, high bit error rate, low bandwidth, and multi-level relay of the transmission link in the space environment make it difficult to rely on feedback traditionally. The reliable transmission performance achieved by confirmation is greatly reduced, and the timeliness of transmission is also greatly limited by the multi-level relay, so it is necessary to propose new solutions in coding and communication protocols. [0003] BATS code (Batched Sparse Code, BAT...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00
CPCH04L1/0009H04L1/0015H04L1/0056
Inventor 卓永宁曾柯吕梦昭
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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