Packet transmission method having self-adapting error correcting capability
An error correction capability and packet transmission technology, applied in transmission systems, digital transmission systems, error prevention, etc., can solve problems such as fixed overhead length, increased number of retransmissions at the transport layer, and increased processing delays
Active Publication Date: 2012-09-26
NO 30 INST OF CHINA ELECTRONIC TECH GRP CORP
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[0004] The characteristic of the existing FEC scheme is that the number of bytes t in the supervisory section of the RS code of the packet is fixed, and the FEC technology using RS format coding can strengthen the error correction capability of the packet and reduce the number of upper layer retransmissions; Its disadvantage is that when the channel quality is good, since the length of the redundant byte overhead of RS coding is fixed, it not only wastes the transmission bandwidth but also increases the extra processing delay and storage space, and at the same time when the channel quality is poor Under normal circumstances, when the channel error code is greater than the error correction capability of the error correction code, the error rate of the packet will increase, resulting in an increase in the number of retransmissions at the transport layer (such as TCP)
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[0026] All features disclosed in this specification, or steps in all methods or processes disclosed, may be combined in any manner, except for mutually exclusive features and / or steps.
[0027] Any feature disclosed in this specification (including any appended claims, abstract and drawings), unless expressly stated otherwise, may be replaced by alternative features which are equivalent or serve a similar purpose. That is, unless expressly stated otherwise, each feature is one example only of a series of equivalent or similar features.
[0028] Below, the present invention will be described in further detail in conjunction with the accompanying drawings.
[0029] A packet transmission method with adaptive error correction capability, such as figure 2 Shown is the principle block diagram of the self-adaptive error correction module of the present invention, and the sending end selects the corresponding RS coding scheme according to the packet error rate (PER) of the receiving...
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The invention discloses a packet transmission method having a self-adapting error correcting capability, which comprises the following steps: step S1, a transmitting end selects a corresponding RS(n,k) coding scheme based on PER collected and analyzed by a receiving end; step S2, a transmitted packet pack is split based on the k value in the selected RS(n,k) coding scheme, and is subject to the corresponding RS coding to form n-byte packets; and step S3, 8 packets are assembled into a frame. The packet transmission method having the self-adapting error correcting capability can automatically carry out the error correction coding based on the channel error code condition, adopts the code having a weak error correcting capability under the condition of a better channel quality, and adopts the code having a strong error correcting capability under the condition of a worse channel quality, thereby ensuring the success rate of the packet transmission, and meanwhile improving the utilization ratio of the transmission bandwidth.
Description
technical field [0001] The invention relates to a packet transmission method, in particular to a packet transmission method with adaptive error correction capability. Background technique [0002] In the transmission of communication signals, in order to fight against the bit errors of packet packets (including IP packets, PPP frames, frame relay packets, Ethernet frames, ATM cells, etc.), FEC (Forward Error Correction) technology is usually used to Packets are protected with forward error correction. [0003] The current FEC technology generally adopts RS format coding. The RS code is the Reed-Solomon code, which is an error-correcting code capable of correcting multiple errors, such as figure 1 Shown is the structural diagram of the RS code, the RS code is (n, k, t=n-k), wherein t is the number of resistive length bytes, and the supervision section is t bytes (overhead byte section, or redundant word In the RS(n, k) coding mode, k represents the effective data length, a...
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IPC IPC(8): H04L1/00
Inventor 陈松喻辉
Owner NO 30 INST OF CHINA ELECTRONIC TECH GRP CORP