XCP协议的稳定性分析及其仿真  

Simulation and stability analysis of XCP protocol

作　　者：王昆[1] 

机构地区：[1]西南科技大学计算机学院,四川绵阳621010

出　　处：《电子技术应用》2010年第5期133-135,共3页Application of Electronic Technique

基　　金：国家863计划项目(2007AA01Z151)

摘　　要：随着每一流的带宽时延乘积的增长,在不考虑排队方案的条件下,TCP协议变得不稳定和效率低下。XCP协议扩展了ECN显式拥塞指示机制,它通过在拥塞头携带控制信息极大地改善了因特网的拥塞控制。路由器能通知发送端瓶颈链路的拥塞程度而不是网络是否拥塞,发送端就可以根据网络的状态相应地增加和减少它的发送窗口。同时对XCP协议的稳定性进行分析,并对协议做了相应的仿真。仿真结果表明,在高带宽时延乘积网络中,XCP协议能更好地保持效率、公平性和稳定性。With the per-flow product of bandwidth and latency increases, TCP becomes inefficient and prone to instability, regardless of the queuing scheme. XCP achieves a significant advance in internet congestion control by carrying the control information in the congestion header and generalizing the explicit congestion notification proposal （ECN）. The routers can inform the sender about the degree of congestion at the bottleneck instead of just congestion or not. This allows senders to increase or decrease their sending windows responsively according to status of network. The stability to the XCP protocol is analyzed and simulated. The results of simulation demonstrate that the eXplicit control protocol （XCI9） remains efficient, fair and stable in the large bandwidth-de- lay product （BDP） networks.

关 键 词：XCP 拥塞控制 高带宽时延乘积 

分 类 号：TP301.6[自动化与计算机技术—计算机系统结构]