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目前在数字集群通信系统中采用时分多址技术,通过信道共用的方法,较好的解决了频率资源紧张的问题。然而信道共用必须要解决好信息“碰撞”问题。ALOHA算法是运用比较普遍的一种解决信道争用算法,文中对ALOHA算法及其衍生算法进行研究,并提出优化的防碰撞算法,采用动态估算碰撞时隙数,满足在呼叫时以最大吞吐量进行工作。
At present in the digital trunking communication system using time division multiple access technology, through the channel sharing method, a better solution to the problem of frequency and resource constraints. However, channel sharing must solve the information “collision” problem. ALOHA algorithm is a more common solution to the channel contention algorithm. In this paper, the ALOHA algorithm and its derived algorithm are studied, and an optimized anti-collision algorithm is proposed. The number of collision slots is dynamically estimated to meet the maximum throughput working.