An Adaptive HEC Scheme with Variable Packet Size for Wireless Real-time Reliable Multicast  

作　　者：TAN Guoping LI Yueheng 

机构地区：[1]Institute of Communication and Information Systems, Hohai University, Nanjing 210098, China [2]College of Computer and Information Engineering, Hohai University, Nanjing 210098, China

出　　处：《Chinese Journal of Electronics》2012年第2期299-303,共5页电子学报（英文版）

基　　金：Manuscript Received May 2010; Accepted Oct. 2011. This work is supported by the National Natural Science Foundation of China （No.61001068, No.61003224）; the Specialized Research Fund for the Doctoral Program of Higher Education （No.20100094120017）; the Fundamental Research Funds for the Central Universities （No.2009B04014）.

摘　　要：Based on a general architecture of erasure error correction under strict delay constraints for real- time wireless multicast, we contribute a simple method for analyzing quantitatively the effect of packet size on the throughput performance of Hybrid error correction （HEC） schemes. We then propose an adaptive HEC scheme for maximizing its throughput with Variable packet size （VPS）. By analysis, it is found that the throughput per- formance of the adaptive HEC scheme with VPS is influ- enced deeply not only by the variation of packet size, but also by the change of the weight of overhead messages in packets. It indicates that the packet size and the weight of overhead messages should be designed jointly for achieving the optimum throughput performance. Finally, comparing with those schemes with fixed packet size, the analysis re- suits show that the adaptive HEC scheme with VPS can improve the throughput by about 20% in some cases.

关 键 词：Hybrid error correction Real-time mul-ticast~ Wireless networks~ Variable packet size. 

分 类 号：TP393[自动化与计算机技术—计算机应用技术] TP273.2[自动化与计算机技术—计算机科学与技术]