广播网络中基于补丁流的丢包恢复机制研究

刘聪; 廖建新; 王纯; 王敬宇; 张婧

doi:10.3724/SP.J.1146.2008.00554

广播网络中基于补丁流的丢包恢复机制研究

doi: 10.3724/SP.J.1146.2008.00554

基金项目:

国家杰出青年科学基金(60525110)，国家973 规划项目(2007CB307100，007CB307103)和电子信息产业发展基金项目(基于3G的移动业务应用系统)资助课题

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出版历程
- 收稿日期: 2008-05-05
- 修回日期: 2008-09-30
- 刊出日期: 2009-06-19

Research on Mechanism of Packet Loss Recovery Using Patching FEC in Broadcasting Networks

摘要

摘要: 现有的数字广播网络由于没有回传通道，发送端无法知悉传输过程中的丢包状况。接收端处在广播网络的不同位置，常常因处于小区边缘或受障碍物遮挡等原因造成信号减弱，从而导致丢包率提高。该文提出了一种基于pFEC (patching Forward Error Correction，补丁FEC)的丢包恢复机制，来解决单向广播网络的丢包问题。该方法利用蜂窝移动网络的双向信道来传输补丁流，提供自适应的FEC来降低丢包率。这种方式可以在广播业务中为不同位置的用户提供不同的丢包恢复能力。理论建模及仿真结果显示，在蜂窝移动网络丢包率不高的情况下，pFEC机制能够有效应对个别用户突发的丢包，从而提高广播业务整体的可靠性和服务质量。
- 广播网络; 前向纠错; 补丁流; 丢包率
Abstract: As the broadcasting networks have no feed back channel, the sender has no idea about the packets loss during the packets are transmitted. Signals may reduce and the Probability of Packet Loss (PPL) increases, when the terminals are on the edge of the cell or blocked by some buildings. A patching Forward Error Correction (pFEC) mechanism is proposed to provide low PPL in broadcasting networks. The mobile networks are used as the return channel to get the information of PPL, and the redundancy packets are transmitted via mobile networks for reducing the PPL. This mechanism provides the different packet loss recovery ability for different people according to the reports from receivers. The simulation results show that if the mobile networks are in a low PPL condition, the pFEC mechanism will have a good performance in decreasing the PPL, and improves the reliability and quality of service.

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Rosenberg J and Schulzrinne H. An RTP Payload Format forGeneric Forward Error Correction. RFC2733, Dec 1999.[2]蒋建国, 苏兆品, 李援, 梁立伟. RTP/RTCP 自适应流量控制算法. 电子学报, 2006, 34(9): 1659-1662.Jiang Jian-guo, Su Zhao-pin, Li Yuan, and Liang Li-wei.Adaptive flow control algorithm for RTP/RTCP. ActaElectronica Sinica, 2006, 34(9): 1659-1662.[3]梅峥, 李锦涛. 一种自适应的视频流化前向纠错算法. 软件学报, 2004, 15(9): 1405-1412.Mei Zheng and Li Jin-tao. An adaptive forward errorcorrection algorithm for streaming video. Journal of Software,2004, 15(9): 1405-1412.[4]张立军, 曹志刚, 李安国. 基于校正子的第一类混合ARQ 及其性能分析[J].电子与信息学报.2006, 28(2):242-246浏览[5]张立军, 曹志刚, 李安国. 基于可逆RS 码的第II 类多进制混合ARQ 及其性能分析, 上海交通大学学报2006, 40(1):50-53.Zhang Li-jun, Cao Zhi-gang, and Li Victor O K. Invertible RScodes based non-binary type-II hybrid ARQ and itsperformance analysis. Journal of Shanghai JiaotongUniversity, 2006, 40(1): 50-53.[6]杨瑞娟, 黄美荣, 柳健. 一种实时可靠多播协议延迟性能分析,电子学报, 2007, 35(1): 91-94.Yang Rui-juan, Huang Mei-rong, and Liu Jian. Analysis ofdelay characteristic in a real time reliable multicast protocol.Acta Electronica Sinica, 2007, 35(1): 91-94.[7]Djukic P and Valaee S. Reliable packet transmissions inmultipath routed wireless networks. IEEE Trans. on MobileComputing, 2006, 5(5): 548-559.[8]Nafaa A, Taleb T, and Murphy L. Forward error correctionstrategies for media streaming over wireless networks.Communications Magazine, IEEE, 2008, 46(1): 72-79.[9]Tan Wai-Tian and Zakhor A. Video multicast using layeredFEC and scalable compression[J].IEEE Trans. on Circuits andSystems for Video Technology.2001, 11(3):373-386[10]Zaichen Zhang and Li V O K. Network-supported layeredmulticast transport control for streaming media[J].IEEE Trans.on Parallel and Distributed Systems.2007, 18(9):1332-1344

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