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Redundancy-free anti-interference coding method

A coding method and a redundant technology, which are applied in the field of data communication transmission coding, can solve problems such as service quality degradation, and achieve the effect of facilitating implementation, finite field size and finite field operation complexity, and good application prospects

Inactive Publication Date: 2012-01-04
TSINGHUA UNIV
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Problems solved by technology

[0022] The purpose of the present invention is to propose an anti-interference transmission coding method suitable for wireless network broadcasting services, to overcome the problem of service quality degradation caused by wireless packet loss in wireless broadcasting services, and to solve the problems of correct decoding and redundancy in existing coding methods Taking into account the issue of degree control, under the condition that the receiving end can be correctly decoded, data transmission without redundancy is achieved, and the transmission reliability and service quality of broadcast services in wireless networks are improved.

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Embodiment Construction

[0033] The non-redundant anti-interference coding method proposed by the present invention, its flow chart is as attached figure 1 As shown, the k data packets p that will need to be transmitted 1 ,p 2 ,...,p k coded as N s encoded packets Includes the following components:

[0034] (1) In order to ensure that all receiving ends can decode correctly, the sending end uses the number of receiving ends N u and the number of data packets k to determine the size of the encoding matrix as [N s , k], where (N s =N u ×k). Since wireless packet loss will cause the consequences of the existing encoding method being unable to decode correctly at the receiving end, Table 2 shows the worst case of the receiving end receiving the data packet when at least the receiving end receives the data packet correctly. Only one receiving end can receive the data packet in the second data packet transmission. for N u receivers and k packets, in the worst case above requires at least N u ×k...

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Abstract

The invention relates to a redundancy-free anti-interference coding method, which is a high-efficiency coding method capable of improving data packet transmission efficiency and belongs to the technical field of data communication transmission coding. In the method, a coding matrix for coding is determined; the size of the coding matrix is determined at first according to the number of data packets to be transmitted and the number of receivers; and the size of a finite domain with elements in the coding matrix, operations in the finite domain and element values in the coding matrix are determined according to the requirement of no redundancy of the coding matrix to achieve minimum coding operating complexity. By the coding method, the data packets are coded by utilizing the coding matrix, and a coding process is realized by performing vector inner product operations on data packet vectors and row vectors of the coding matrix. The coding method has the advantages of avoiding redundancy coding in the coding process and ensuring that the receivers can accurately decode the data packets in a packet loss network, along with low coding realization complexity and vast application background.

Description

technical field [0001] The present invention relates to a non-redundant anti-jamming coding method, which is a high-efficiency coding method for improving data packet transmission efficiency, relates to wireless network data packet transmission coding technology, and particularly relates to data in a new type of wireless network data broadcasting service A packet transmission encoding method belongs to the technical field of data communication transmission encoding. Background technique [0002] In the transmission of data packets in the wireless network, due to signal weakening, interference and conflict between channels, loss of data packets is inevitable. For wireless packet broadcast services or multicast services, such as text distribution in cellular networks, mobile phone firmware updates or upgrades, if the receiving end cannot get all complete data packets, then it will not be able to enjoy broadcast services, such as text, mobile phone firmware Update or upgrade f...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00
Inventor 任勇何能强姜春晓马鑫李治华于洋
Owner TSINGHUA UNIV
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