融合IP和HFC的多通道协同传输系统的设计和优化  

Design and Optimization for Collaborative Multipath Transfer System Based on Integration of IP and HFC

作　　者：郑艳伟[1,2] 邓浩江[2] 刘磊[2] 王献冠[2] 

机构地区：[1]中国科学院研究生院,北京100049 [2]中国科学院声学研究所国家网络新媒体工程技术研究中心,北京100190

出　　处：《网络新媒体技术》2013年第6期22-28,共7页Network New Media Technology

基　　金：国家高技术研究发展计划(863)"融合网络业务体系的开发"(No.2011AA01A102);国家科技支撑计划"支持增强型搜索功能的三屏融合服务运行平台"(No.2011BAH11B04)

摘　　要：分析了IP双向交互通道和HFC单向广播通道的特性,提出一种在有线电视网上实现数据可靠传输的优化方法。该方法融合IP网络双向交互通道和有线电视网单向通道构建了多通道协同传输系统,使用有线电视网单向通道和IP双向通道协同下发数据,使用IP双向通道交互信令,充分利用有线电视网高带宽的优势实现非对称的宽带数据通信;基于有线电视网单向保序的特性,优化了数据包的重传策略,使得丢失的数据包尽快地重传,提高了数据传输的速率。实验结果表明,所提出的优化方法能够有效地缓解接收缓存阻塞,提升了传输系统的吞吐量。After analyzed the characteristic of IP and HFC,an optimization method for achieving reliable data transmission in cable net- works was proposed. By converging IP bi- directional path and cable one- way path,it built a collaborative multipath transfer system, using cable one- way path and IP bi- directional path to send data collaboratively and using IP bi- directional path to return the ac- knowledgement. A kind of asymmetric broadband data communication was realized by taking full advantage of the high bandwidth of the cable television networks. Based on the order preserving feature of cable networks,the method optimized the packet retransmission strategy and retransmitted the lost packets as soon as possible,which improves the efficiency of data transmission. The experimental re- sults show that the optimization method proposed can decrease the receive buffer blocking effectively and improves the throughput of transmission system.

关 键 词：多通道协同传输 可靠 重传策略 吞吐量 

分 类 号：TN943.6[电子电信—信号与信息处理]