分布式工业测控网DMCN的协议设计

分布式工业测控网ＤＭＣＤ是一种带有令牌总线森林式复合拓朴结构局域网，多主站的加入改变单主站结构的复杂性，它以实时自动多主站控制，保证了ＤＭＣＮ网在一个或多个主站损坏的情况下网络的正常运行，同时，单个树之间也能共享资源，极大地提高了网络的性能，本文阐述ＤＭＣＮ网的拓朴结构和协议结构的设计思想，并重点分析了ＤＭＣＮ网的ＭＡＣ和ＬＬＣ子层协议。

The Design of Distributed Industry Measure and Control's Protocol

Distributed industry measure and control network DMCN is a kind of forest complex topological LAN with token bus. The addition of the multi-master-stations changs the s ingle-mastere -station 's structure relodity. By the simultaneous and automation multi-master-stations control, it makes sures that the LAN can still run normally damaged in DMCN. At the same time, the resource can also be shared by eved single tree,these improve the Performance of the LAN greatly. This paper presents DMCN network's the topological architecture and the idea of the protocol architecture, main analyses DMCN network's protocol of MAC and LLC sublayer.