FEC在高波动性网络中的应用研究  

Research of FEC Codes Based on Unstable Network

作　　者：段涛[1,2] 孙军[1,2] 

机构地区：[1]上海交通大学电子工程系图像通信与信息处理研究所,上海200240 [2]上海市数字媒体处理与传输重点实验室,上海200240

出　　处：《电视技术》2014年第9期140-143,共4页Video Engineering

摘　　要：前向纠错(FEC)方式可以有效提高网络数据传输的可靠性。喷泉码(Digital Fountain)作为其中较先进的一种,在数字视频广播(DVB)和网络通信等领域有着广泛的应用。设计了RS码和Raptor码的性能实验,验证在较高丢包率下的解码性能。提出了结合重传机制的Raptor码多路传输方案。实验证明,对于高波动性网络中的UDP传输,使用Raptor码能以较低的解码开销获得稳定的解码成功率,而ARQ-Raptor多路传输方案能有效地利用多路带宽进行可靠的数据传输。Forward Error Correction （FEC） is an effective method to improve reliability in Network transmission. As the key technology of the network FEC scheme, digital fountain coding is currently widely applied in the fields of digital video broadcasting and internet communication. Decoding perform- ance of RS code and raptor code are simulated based on UDP transmission. The simulation shows that even under very high loss rate, Raptor code can a- chieve high performance with reasonable overhead. New method for multi-channel transmission is proposed, combining Raptor code with minimum ARQ. The simulation oroves that this method can achieve very reliable network transmission making full use of all channels.

关 键 词：REED-SOLOMON码 喷泉码 RAPTOR码 多路传输 

分 类 号：TN919.8[电子电信—通信与信息系统]