摘要
TDMA方式具有占用频带较窄、无远近效应、易增容、实现简单等优点,在实际中有着广泛的应用。结合实际需求,提出采用TDM/TDMA机制构建了一个有中心的,一点对多点的无线局域网的应用方案。给出了实际的帧结构,详细介绍了数据在多径条件下传输时,上下行帧同步技术和动态时延调整技术,同时针对基于竞争机制的信道分配方法造成分组冲突而降低网络性能的方案,提出采用令牌轮询的方式来动态分配信道。
The TDMA method has many advantages such as occupying narrower frequency band, no near-far effect, easiness for increasing capacity and simpleness for realization, as a result it is applied extensively. In order to meet the practical need, this paper presents an application scheme of wireless network, which is point to multi-point network and has its own center. The actual frame structure is given. Frame synchronization technology and the dynamic latency adjustment technology are introduced in detail. Considering the MAC protocols based on competition may often limit the network performance, we allocate channels dynamically using the way of token-polling.
出处
《无线电工程》
2008年第6期56-57,64,共3页
Radio Engineering
