TCP (transmission control protocol) header compression method in wireless IPv6 (internet protocol version 6) network

A compression method and Internet technology, applied in wireless communication, network traffic/resource management, electrical components, etc., can solve problems such as the inability to efficiently compress the header of the TCP stream, and achieve the effect of low system overhead and strong robustness

Inactive Publication Date: 2013-04-24
BEIJING INTERNET INST
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AI Technical Summary

Problems solved by technology

[0004] However, ROHC cannot efficiently compress the header of the TCP stream. ROHC+ proposes a

Method used

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  • TCP (transmission control protocol) header compression method in wireless IPv6 (internet protocol version 6) network
  • TCP (transmission control protocol) header compression method in wireless IPv6 (internet protocol version 6) network
  • TCP (transmission control protocol) header compression method in wireless IPv6 (internet protocol version 6) network

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Embodiment Construction

[0019] 1. ROHC protocol and its implementation

[0020] First introduce the basic principle of ROHC. In order to realize header compression, two new functional units need to be added to the TCP / IP architecture: a header compressor and a header decompressor, such as figure 1 shown.

[0021] The ROHC compressor has three compression states, each of which is a different degree of compression, namely: IR state (Initialization and Refresh), FO state (First Order) and SO state (Second Order), these three compression state levels in turn The compressor always starts working from the lowest compression state, and then shifts to the high-level compression state in turn. Each compression state uses a different header type for each mode of operation.

[0022] ROHC defines three working modes: Unidirectional (U-Mode), Bidirectional Optimistic (O-Mode), and Bidirectional Reliable (R-Mode). Each mode has a different compression state and decompression state, and the compression / decompre...

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Abstract

The invention discloses a TCP (transmission control protocol) header compression method in wireless IPv6 network, belonging to the technical field of improving the compression ratio and robustness of a wireless link. The invention emphasizes the three compression states, three working modes, W-LSB (window-based least significant bit) algorithm and the like of ROHC (robust header compression). A classification mode of the TCP header field is provided, and the profile of TCP/IP compression is written according to the ROHC profile specification; the sliding window width is dynamically adjusted to adapt to the change characteristics of the wireless link, and performance simulation and analysis are performed on the provided method; a test information source of ROHC is designed to facilitate the writing and test of the TCP/IP compression profile of ROHC; and according to the TCP/IP header compression technology and performance in a wireless IPv6 (internet protocol version 6) network, the imperfection of the ROHC and TCP compression scheme is improved, and the result is verified through a simulation test in a prototype system.

Description

technical field [0001] The invention belongs to the technical field of improving the compression rate and robustness of wireless links, and in particular relates to a method for compressing TCP headers in a wireless IPv6 Internet. Background technique [0002] The research shows that the performance of the protocols for compressing IP / UDP / RTP headers on these low-speed links is relatively poor on wireless links. The next step in header compression is to increase robustness and compression efficiency over high bit error rate, low bandwidth wireless links. Uses varying Huffman coding to provide a range of compression header schemes. [0003] In order to obtain higher compression rate and better error-resistant robustness in wireless links, it is necessary to develop a feasible robust header compression scheme. The Robust Header Compression (ROHC, Robust Header Compression) proposed by the IETF working group in 2001 can achieve better performance on wireless links, and was am...

Claims

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Application Information

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IPC IPC(8): H04W28/06
Inventor 程远冯刚常宁
Owner BEIJING INTERNET INST
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