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针对目前紫外光通信组网采用的时分复用(TDM)技术随着节点增加存在排队等待时延长、链路利用率低、网络吞吐量不理想等问题,提出了改进的时分复用组网方法。该方法基于紫外光通信垂直收发模型,通过考虑功率因素的加权算法选取中心节点辐射成相邻小区,用分段时隙方法给相邻小区分配不同时隙段,让相距较远小区内的节点对时隙重复使用,解决了节点增加与时隙有限的矛盾。仿真分析表明,该方法相比TDM在网络节点数为40时的信息排队等待时延降低了4ms,链路利用率提高了2.7%,网络吞吐量增加了1800bit/s。
Aiming at the problems of time-division multiplexing (TDM) technology used in the current ultraviolet optical communication network, such as prolonged queuing waiting time, low link utilization rate and unsatisfactory network throughput, an improved time division multiplexing networking method is proposed . Based on the vertical transmission and reception model of UV communication, the method selects the central node radiating to the neighboring cell by considering the weighted algorithm of power factor, and allocates different time slot segments to the neighboring cell by using the segment time slot method, so that the nodes in the distant cell Repeated use of time slots, to solve the problem of limited nodes and increase the conflict. Simulation results show that compared with TDM, the proposed method can reduce the queuing delay of information queue by 4 ms, increase the link utilization by 2.7% and increase the network throughput by 1800 bit / s.