LTPB网络带宽分配策略的实时性能研究

Research on Real-Time Performance of Bandwidth Allocation for LTPB Network

研究LTPB(线性令牌传递总线 )在通信网络中保证消息实时传输的带宽分配问题 .LTPB网络带宽的分配是以保证网络消息的实时传输为目标的 ,网络中关键参数 (一定时间内发送消息的最小量 )的准确与否将关系到网络带宽分配的合理性和有效性 .通过对带宽分配方法实时特性的分析 ,发现了当前分析方法中的不足 ,提出了“最差情形”的概念 ,并以此建立了合理的推导模型 ,得出了有关LTPB网络实时性分析的关键性结果 ,并为下一步寻求更优的带宽分配方法提供了可靠的分析基础 .

The problem of guaranteeing real-time message transmission in LTPB network, linear token passing bus, has been studied. Bandwidth allocation for LTPB aims at real-time message transmission, and the key parameter, the minimum amount of time used for real-time message transmission in unit time, is an important factor to the property and validity of the bandwidth allocation. Having found out a defect in current real-time performance analysis method, a concept of the worst case situation is proposed and a reasonable model is developed. the important result in real-time performance analysis is got for LTPB network, and the analytic foundation is established to seek the better bandwidth allocation scheme.