高误码条件下的TCP序号字段协同恢复方法  

Joint Recovery Method of TCP SEQ Field Under High Error Rate Condition

作　　者：陈彦[1] 王晓梅[1] 范亮[1] 

机构地区：[1]信息工程大学,河南郑州450001

出　　处：《信息工程大学学报》2016年第3期365-369,共5页Journal of Information Engineering University

摘　　要：在网络数据差错处理中,部分情形下容错接收能够获得比反馈重传更好的系统性能。重组是容错接收中重要的一环,针对高误码条件下TCP业务数据重组中分组位置难以确定的问题,文章对TCP序号字段的恢复方法展开研究,分析了序号字段的自相关性和跨层相关性,充分挖掘其冗余关系,提出了基于协同重组的TCP序号联合估计方法。实验表明,该方法能够有效恢复出错的TCP序号字段,提升高误码条件下TCP数据的重组正确率。In error handling of network data, sometimes one can obtain a better system performance by adopting error-tolerant reception than by retransmitting. Reassembly is an important step of error- tolerant reception. In high error rate conditions, it＇ s hard to determine the location of TCP packets while reassembling. To solve this problem, the paper studies the recovery method of TCP SEQ field （sequence number）. The self-correlation and cross-layer correlation of SEQ field are analyzed and the redundancy is exploited fully. Then, a joint estimate method of TCP SEQ based on cooperative reassembly is proposed. The experiment results show that the proposed method can effectively recov- er the errors in TCP SEQ field, and enhance the reassembly accuracy of TCP data in high error rate conditions.

关 键 词：重组 相关性 跨层 协同恢复 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]