感知无线电网络中的呼叫延迟阻塞概率研究

Research on probability of call blocking delay in CR networks

呼叫允许控制是无线资源管理中的重要组成部分,是一种减少网络拥塞、保证服务质量和提高网络资源利用率的重要机制。在给定系统资源情况下,准确估计用户呼叫延迟阻塞概率,能为网络优化建设提供一个重要依据。在排队论——生灭过程的基础上,探讨了感知无线电(CR)网络中的呼叫延迟阻塞概率与系统资源的关系,并给出了估计公式,仿真结果表明其精确度很高。

Call admission control is a very important technology in wireless resource management,and it is one of the key schemes to decrease congestion,guarantee QoS and improve resource utilization.System resources in a given case,an accurate estimate of the user call blocking probability could provide an important basis for the network to be optimized building.This research based on queuing theory-birth and death process,explored the relationship between the probability of call blocking delay in CR networks and system resources.At the same time,gave an estimated formula.Simulation results show that it has a high degree of precision.