Non-uniform error protection method based on physical layer network coding technique in relay system

A technology of equal error protection and relay system, applied in radio relay system, passive power relay system, transmission system, etc., can solve the problem of difficult to achieve multi-level data hierarchical processing and so on

Inactive Publication Date: 2009-02-18
BEIJING UNIV OF POSTS & TELECOMM
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In general, the equal error protection method can be realized at the relay node through the physical layer network coding ...

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  • Non-uniform error protection method based on physical layer network coding technique in relay system
  • Non-uniform error protection method based on physical layer network coding technique in relay system
  • Non-uniform error protection method based on physical layer network coding technique in relay system

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Embodiment Construction

[0015] The business scope of hierarchical data in wireless communication is relatively wide. For the sake of understanding, a representative example is used here to illustrate the unequal error protection scheme of the present invention, that is, the video data exchange model using H.264 coding technology. The present invention is generally applicable to all data services with this example characteristic.

[0016] The video stream processed by the H.264 video coding standard contains three parts of data information, among which, the data in area A is the header information, which is the most important. The data in area B is intra-frame predictive coding residual data, which is more important than the data in area C. The lowest level of protection is data in area C, that is, inter-frame coded residual data. The B partition, which is the residual data of intra-frame predictive coding, is very small. Generally, the B partition and the C partition are bundled and transmitted. Ar...

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Abstract

The invention provides a technology used in a mobile communication relay system, which conducts an unequal error protection combination to data parts with different important grades in two receiving signals at the relay node. Comparing to the conventional equal error protection combination method, this method of the invention can improve the transmission performance of data stream and is easy to implement. The technology of the invention combines a physical layer network encoding technique and a superposition encoding technique. At the relay node the weight and combination of data with different important grades in two receiving signals is realized according to different energy coefficients, thereby the unequal error protection combination is realized.

Description

technical field [0001] The invention relates to an unequal error protection method in a relay system. When a relay node merges data transmitted by two users, the invention can be used to perform different classification on data of different importance levels in each user. processing, in order to achieve the purpose of unequal error protection and improve system performance. The present invention can be applied to a simple three-node information exchange system, a multi-access relay system and similar communication systems with relay nodes. Background technique [0002] In recent years, network coding technology has gradually become a hot spot in the communication field, mainly because network coding technology can improve the throughput performance of the system very well. In addition, it can also bring diversity gain when used in relay systems. The physical layer network coding technology is different from the traditional network coding technology in that it realizes the c...

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Application Information

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IPC IPC(8): H04L1/00H04L12/56H04Q7/22H04B7/145
Inventor 隋东秦晓芳张欣杨大成
Owner BEIJING UNIV OF POSTS & TELECOMM
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