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面向路径选择的重叠网络中继路径QoS(Quality of Service,服务质量)测量和评价,尚未有完善的技术方案;在实时传输相关的路径评价方面,可以使用RTCP协议(Real-time Transport Control Protocol,实时传输控制协议)以统计分析的方式对时延、时延抖动、带宽、丢包率等内容进行评价,但这些评价都是针对单径和“端到端”的,并不能有效地应用于多径传输控制.本文结合应用需求,提出一种新的基于中继的重叠网络多径QoS动态评价协议(MRP-RTCP),协议基于中继节点类型提出路径稳定度作为新的QoS评价参数,给出了相关的交互消息格式,仿真测试结果显示,该协议能实时准确判断路径QoS,多径实时媒体传输应用中的路径选择准确度及速度有较大提高.
There is no perfect technical solution for the measurement and evaluation of the quality of service (QoS) of overlay networks for path selection. For real-time transmission-related path evaluation, RTCP (Real-time Transport Control Protocol, Real-time transmission control protocol) to statistical analysis of the delay, delay jitter, bandwidth, packet loss rate and other content evaluation, but these evaluations are for single-path and “end to end ”, and can not effectively Which is applied to multipath transmission control.This paper proposes a new relay-based multi-path QoS dynamic evaluation protocol (MRP-RTCP) based on application requirements. The protocol proposes the path stability based on the relay node type as a new QoS evaluation The relevant interactive message formats are given. The simulation results show that the protocol can accurately determine the path QoS in real time and improve the accuracy and speed of path selection in real-time multi-path media transmission applications.