摘要
激光通信信道冲突会降低网络性能，导致信道拥塞，针对当前信道冲突解决方法存在的时隙利用率低，在时间调度分组时分解次数多、过程复杂等不足，提出改进树形结构的激光通信信道冲突解决方法。首先分析网络中数据传输及信道切换机制，利用连续空闲时隙识别出信道冲突的概率，然后依据树形分解方法推导出解决信道冲突的平均时隙数和冲突矩阵，最后基于冲突矩阵将激光通信中的信道合理地分配给各链路，改善信道冲突并提高网络性能。实验结果表明，该方法的时隙仿真值与理论值更为接近，可以提高激光通信的数据吞吐率。
Channel conflicts in laser communication can reduce network performance which leads to channel congestion. For current channel conflict resolutions, there are low time slot utilization, over decomposition during time scheduling, complicated process and more other problems. Therefore, the channel conflict resolution method of laser communication bosed on improved tree structure is proposed. First, analyze the mechanisms of data transmission and channel switching, recognize the conflict rate by continuous spare time slot. Then deduce the average time slot and conflict matrix of the resolution according to tree decomposition method. Finally, allocate the channel to each link reasonably according to conflict matrix, to improve the coflicts and network performance. The experimental results show that this method has proper simulation value which close to theoretical value, and it can improve the throughput rate of data.
作者
范凯
蔡念
FAN Kai1, CAI Nian2(1. Basic Experiment Center, Tianjin Sino Guang Dong German University of Applied Sciences, Tianjin 300350, China; 2. School of Information Engineering, Guangdong University of Technology, Guangzhou 510006, Chin)
出处
《激光杂志》
北大核心
2018年第5期107-110,共4页
Laser Journal
基金
广州市产学研协同创新重大专项项目(No.201604016022)
广东省协同创新与平台环境建设专项资金(产学研合作项目)(No.2015B090903017)
关键词
激光
传感网络
信道冲突
树形结构
时隙
laser
sensor network
channel conflict
tree structure
time slot
