摘要
变结构控制协议(VCP)是一种高带宽时延乘积网络环境下良好的拥塞控制机制。然而在多瓶颈网络拓扑中,由于VCP采用基于负载因子编码的反馈控制机制,长距离数据流的过载响应受传输路径上多个节点的控制,从而系统达不到最大最小公平。通过分析VCP的拥塞信息反馈方式,提出一种基于过载周期的反馈控制机制,使每个数据流的过载响应只受其瓶颈链路的控制,从而使系统达到最大最小公平。最后利用NS2仿真实验验证了基于过载周期的反馈控制机制的有效性。
Variable-structure congestion Control Protocol(VCP) is an effective congestion control mechanism for high Bandwidth-Delay Product(BDP) networks.In the multiple bottleneck network,however,the congestion signal of VCP is feedback based on encoded load factor;as a result,the overload responses of long flows are controlled by multiple routers in the transmit path,and failed to achieve max-min fairness.To address this problem,the congestion signal is feedback based on a new metric called overload period in each router,and the overload response of every flow is controlled by the router with minimum overload period.The proposed mechanism improves VCP to achieve max-min fair bandwidth allocation.Finally,the improved control mechanism is validated using NS2 simulations.
出处
《系统仿真学报》
CAS
CSCD
北大核心
2010年第7期1716-1719,1723,共5页
Journal of System Simulation
关键词
高带宽时延网络
拥塞控制
变结构控制协议
多瓶颈网络
最大最小公平
high bandwidth delay product networks
congestion control
variable-structure congestion control protocol
multiple bottleneck network
max-min fairness