Access Control Algorithm for VLC System under ALOHA Mechanism
In order to improve the resource utilization of visible light communication(VLC)system and realize efficient service of the system,VLC system access control algorithm based on ALOHA mechanism has been designed in this study.Firstly,the ALOHA service mechanism with multi-packet reception(MPR)capability was modeled for VLC system,and the packet arrival process was described by poisson process.Then,combined with the theory of effective capacity and effective bandwidth,the arrival intensity that the system can support under the constraint of quality of service(QoS)was calculated.The Optimization problem with the objective of maximizing the arrival intensity was constructed and solved by grey wolf optimization(GWO).The GWO was compared with particle swarm optimization(PSO).It could be concluded that the GWO has good optimization effect and strong global search ability.Finally,Matlab simulation was used to analyze the influence of the number of terminals,the probability of not being occluded,and the multi-packet reception ability on the arrival intensity.Simulation results showed that the algorithm provides some guidance for the access control of VLC system and improves the utilization rate of system resources.
access control algorithmeffective bandwidtheffective capacitygrey wolf algorithm
万方数据
维普
