Based on the self developing asynchronous parallel communication card the system, adopts a tree or hierarchical topology structure and develops a real time communication protocol.

该系统基于自行设计的异步并行通讯卡，采用树型分级拓扑结构，并开发了相应的实时通讯协议。

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In order to deal with hierarchical routing with delay and bandwidth constraints, a new topology aggregation algorithm called stair method was proposed.

针对时延—带宽约束的层次路由问题，提出了楼梯法这一全新的拓扑聚集算法。

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In vehicular AD hoc networks, stable clustering methods could reduce the networks of communication relay and provide for a more efficient hierarchical network topology.

车用自组网中，有效的分层协议可以增强网络逻辑拓扑结构的稳定性，减小通信中继花费。

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