Stratospheric Communication System Ipv6 Header Compression Algorithm

Stratospheric communication system has many advantages, such as the large coverage area, small propagation delay, rapid deployment and a great variety of services can be offered, etc. Stratospheric communication system has broad application prospects and great potential in the field of national defense construction, traffic command and monitoring of natural disasters. At present, the research of stratospheric communications and information technology have attracted great attention in many countries.IPv6 header compression is one of the key technology of the stratospheric communication systems. Stratospheric communication system uses the IPv6 protocol to provide voice, video, database access and other services for users. However, the protocol header of the stratospheric communication transfer protocol framework contains a lot of redundant information, resulting in lower utilization of wireless channel bandwidth. And the packet too long will increase the bit error rate. Therefore, it is necessary to uses the header compression technology in stratospheric communication system to improve business information ratio in the wireless transmission by compressing the duplication parts of the fixed traffic stream header.In this thesis, the need of header compression in the stratospheric communication system and some typical kinds of header compression schemes are introduced. Based on the analysis on ROHC (Robust Header Compression), an adaptive robust header compression algorithm is proposed and designed in the stratosphere communication system. For characteristics of the media access control layer in the stratospheric communication system, we also proposed a PHS (Payload Header Suppress) program. Finally, in order to analyze the feasibility of the two compression schemes, a simulation model of the stratospheric communication system is built by OPNET. Simulation results show that: the 60-bytes header of RTP/UDP/IPv6 can be compressed to 1~3 bytes in the stratospheric communication system using IPv6 header compression techniques; The performance of A-ROHC scheme is better than PHS; A-ROHC adopting a flexible compression strategy can achieve the good balance of compression ratio and error-resistant robustness for the adaptive use in wireless links.