适宜普适无线网的地震实时数据压缩重传算法
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摘要
分析使用普适无线网构建地震实时数据远程传输共享应用平台的不足,现有的STEIM1和STEIM2压缩算法无法满足波动增大和频率增高的原始数据压缩。针对现有压缩算法的不足,提出了新的三向数据分布区间压缩和重传算法,减少普适无线网的链路负载和增加应用层控制,降低延时抖动,大幅提升平台运行率,使其达到了实用化效果。
Shortages of using ubiquitous wireless networks to build earthquake real-time data remote transferring and sharing applications platform are analyzed,and it isn't suitable to compress earthquake real-time data when it uses STEIM1 and STEIM2 compression algo-rithms for huge undulation and high frequency data.One brand-new compression and retransfer algorithm named distributing extent of three direction data(DETDD) is proposed,it's suitable to reduce traffic flow and enhance control of application layer,decrease to delay and delayjitter,clearly advance to the platform's run-rate,so make the platform become effective availability.
Shortages of using ubiquitous wireless networks to build earthquake real-time data remote transferring and sharing applications platform are analyzed,and it isn't suitable to compress earthquake real-time data when it uses STEIM1 and STEIM2 compression algo-rithms for huge undulation and high frequency data.One brand-new compression and retransfer algorithm named distributing extent of three direction data(DETDD) is proposed,it's suitable to reduce traffic flow and enhance control of application layer,decrease to delay and delayjitter,clearly advance to the platform's run-rate,so make the platform become effective availability.
引文
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[2]Takasugi K,Nakamura M,Kubota M,et al.Service continuityadapting to ubiquitous service environment[J].The Journal ofIEICE,2003,86(12):955-958.
[3]Yokozawa M.Innovative communication technologies based onthe ubiquitous network[J].The Journal of IEICE,2004,87(5):433-439.
[4]Mohanty S,Xie J.Performance analysis of a novel architectureto integrate heterogeneous wireless systems[J].Computer Net-works,2007,51(4):1095-1105.
[5]Wang X G,Min G,Mellor J E,et al.An adaptive QoS frameworkfor integrated cellular and WLAN networks[J].Computer Net-works,2005,47(2):167-183.
[6]Xin F,Jamalipour A.TCP performance in wireless networkswith delay spike and different initial congestion window sizes[J].Computer Communications,2006,29(8):926-933.
[7]Vacirca F,Ziegler T,Hasenleithner E.An algorithm to detectTCP spurious timeouts and its application to operational UMTS/GPRS networks[J].Computer Networks,2006,50(16):2981-3001.
[8]王洪体,陈阳,庄灿涛.SEED格式STEIM2数据压缩算法在实时地震数据传输中的应用[J].地震地磁观测与研究,2004,25(4):14-19.
[9]罗新恒,张哲,王春明,等.SEED数据压缩率的比较[J].地震地磁观测与研究,2004,24(4):41-47.
[10]Kosuga M,Kirimoto N,Yamazaki T,et al.A multimedia servicecomposition scheme for ubiquitous networks[J].Journal of Net-work and Computer Applications,2002,25(4):279-293.
[11]Liu H I,Wu C T.Virtual private dial-up services over multi-pro-tocol label switching networks[J].Computer Communications,2002,25(9):884-889.
[12]Tang J L,Xu R N,Chen H G,et al.Virtual instrument for con-trolling and monitoring digitalized power supply in SSRF[J].Nuclear Science and Techniques,2006,17(3):129-134.
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