摘要
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。
An improved time division multiplexing network method is proposed to solve such problems as the long queuing delay time,the low link utilization ratio and the non-ideal network throughput which are caused by the increased nodes when time division multiplexing（TDM）technology is used in the ultraviolet communication network at present.Based on the model of ultraviolet communication vertical transceiver,this method selectes the central node to radio into the adjacent cell by taking weighted algorithm of power factor into consideration,and distributes the adjacent cell different slot sections by using piecewise slot method to achieve the goal that the nodes in the far area can use time slot repeatedly and the contradiction between the increased nodes and the limited time slot can be solved.The simulation analysis indicates that,compared with TDM,when the network node number is 40,this method can decline 4 ms in the queuing delay time,raise 2.7%in the link utilization ratio,and increase 1800 bit/s in the channel throughput.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2014年第11期126-131,共6页
Chinese Journal of Lasers
基金
山东省"泰山学者"建设工程专项经费资助项目(ts20081330)
山东省自然科学基金青年基金(ZR2013FQ010)
关键词
光通信
紫外光通信
组网方法
时分复用
加权算法
optical communications ultraviolet communication network method time division multiple weighted algorithm
