基于缓存的语音/数据呼叫无线接入控制算法

A Novel Voice / Data Call Admission Control Algorithm Based on Call Buffer in Wireless Networks

该文提出了一种新的无线网络中语音/数据的呼叫接入控制算法(DTQ-VBR算法),设置资源预留的双重门限及呼叫缓存,兼顾数据业务的VBR特性,动态改变其服务带宽,并利用三维马氏链对其进行性能分析。大量的仿真实验表明,与DTR-Q、DTBR算法相比,该文算法的平均信道利用率、呼叫强拆率及阻塞率等性能具有明显的提高。

A novel voice / data call admission control algorithm based on call buffer in wireless networks is presented in this paper, which is charactered by dual thresholds with queueing for Variable Bit-Rate Data Traffic call （ DTQ-VBR ）. The algorithm gives attention to the VBR character of data traffic and can adapt its service bandwidth through different settings of the thresholds and the call buffer size. Theoretical performance analysis is made by using three dimensions Markovian chain, and it is also shown that compared with DTR-Q and DTBR algorithm, the performances of the presented algorithm such as average channel utility, call dropping probability and block probability can be improved significantly according to a number of simulations.