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Real-time multicasting self-adaptation optimization method based on unequal error protection

A technology of error protection and optimization method, which is applied in the coding environment field of rateless codes, can solve problems such as high-efficiency unequal error protection solutions, and achieve the effects of ensuring transmission reliability, reducing search complexity, and optimal coding rate

Inactive Publication Date: 2014-06-11
HOHAI UNIV
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Problems solved by technology

[0005] At present, in the field of real-time multicast in communication networks, there is no efficient unequal error protection solution that can adapt to the link environment to meet the reliability requirements of real-time multicast services under strict delays while maximizing Throughput performance of the network

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  • Real-time multicasting self-adaptation optimization method based on unequal error protection
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  • Real-time multicasting self-adaptation optimization method based on unequal error protection

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Embodiment Construction

[0051] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0052] Before that, first introduce the error correction structure under the strict delay limit, the specific function realization of this structure will depend on the setting of its parameters. In order to facilitate description of all processing flows of the present invention, the symbols of several groups of parameters used in the error correction structure are defined below:

[0053] Table 1: Parameter definitions of the error correction structure

[0054]

[0055]

[0056] 1. Determination of n value: definition D E2E is the maximum possible end-to-end delay, define d max The maximum delay required to send a packet; obviously, the determination of the value of n is only related to the maximum delay D E2E and d max relevant, so once D E2E and d max Determined, the value of n is a fixed value, and n=K at the same time i +p i , then...

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Abstract

The invention discloses a real-time multicasting self-adaptation optimization method based on unequal error protection, which is realized by an error correction structure under a strict delay constraint and an optimal searching method and a greedy algorithm provided based on the error correction structure. The real-time multicasting self-adaptation optimization method of the invention, designed based on the unequal error protection, is capable of self-adaptively choose an optimal coding parameter according to a protection requirement of an upper link on the information and the conditions of the present link, and increasing the coding efficiency to the largest extent so as to make use of a limited bandwidth resource and effectively improve the requirement on the reliability of a real-time service under the strict delay constraint.

Description

technical field [0001] The invention relates to a real-time multicast self-adaptive optimization method based on unequal error protection. The method is suitable for any real-time unicast or multicast communication, especially suitable for a rateless code (Rateless Code) coding environment. Background technique [0002] With the rapid development of communication networks, people's demand for real-time multimedia is also increasing, and real-time services have become a hot spot for research and application. Real-time multimedia data streams are usually transmitted using the traditional Real-time Transport Protocol (RTP). RTP is defined to work in one-to-one or one-to-many transmission situations, and its purpose is to provide time information and achieve stream synchronization. The RTP protocol itself does not provide any mechanism to guarantee the quality of service (QoS) of real-time multicast services. However, due to the diversity and complexity of the existing network...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00
Inventor 谭国平马赛赛李岳衡
Owner HOHAI UNIV
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