一种用于T-DMB系统IP业务传输的GSE-FEC方案  

A Novel GSE-FEC Scheme for IP-Based Service Transmission in T-DMB System

作　　者：李立[1] 刘元安[1] 刘凯明[1] 刘炀[1] 程飞[1] 

机构地区：[1]北京邮电大学泛网无线通信教育部重点实验室,北京100876

出　　处：《电子与信息学报》2009年第5期1233-1236,共4页Journal of Electronics & Information Technology

基　　金：华为项目(YBIN2006087)资助课题

摘　　要：该文采用通用流封装GSE来完成地面数字多媒体广播(T-DMB)系统的IP业务的传输,提出了一种改进的GSE-FEC方案。其中设计了一种可提供帧重构信息以及错误位置信息的改进的GSE封装(IGSE),进一步提出了基于IGSE的带擦除译码方案IGE,用于GSE-FEC方案的译码部分,较好地提高了GSE-FEC的性能。仿真结果表明,IGE与基于非带擦除(NE)以及基于现有GSE封装的带擦除(GE)RS译码方案相比,均表现出更强的纠错能力,另外,与GE方案相比,IGE可以更好的保护正确字节,有效的减少信息浪费。In this paper, based on the analysis of the existing encapsulation schemes, Generic Stream Encapsulation （GSE） is chosen to transmit IP-based service in the Terrestrial-Digital Multimedia Broadcasting （T-DMB） system. As a new emerging technology, no corresponding Forward Error Correction （FEC） function is considered for GSE. This paper proposes a GSE-FEC method to provide additional error protection. In order to further improve the performance of GSE-FEC, an Improved GSE （IGSE）scheme is devised to provide the GSE-FEC frame reconstruction information and the erasure information, and an Improved GSE Erasure （IGE） decoding scheme is presented based on the IGSE for the decoding in GSE-FEC system. The simulation results demonstrate that the IGE scheme shows better error correction capability than the schemes based on Non-Erasure （NE） decoding and GSE Erasure （GE） decoding. Moreover, comparing with GE scheme, the proposed scheme can reserve the correct bytes to the best of its ability for avoiding information wasting.

关 键 词：地面数字多媒体广播 通用流封装 RS码 带擦除译码 循环冗余校验 

分 类 号：TN941.3[电子电信—信号与信息处理]