移动通信越区优先动态信道保留及排队算法研究

Analysis of dynamic channel assignment with queuing and guard channel strategies for handoff prioritization

本文提出了移动通信越区优先动态信道保留及排队算法(DCA-GC-QH)并加以深入研究,通过建立M／M／M／T马尔可夫链模型,以及通话阻塞率和越区通话中断率的动态建模,从而进一步优化信道分配。与固定信道策略相比,动态信道保留及排队策略的通话阻塞率和越区掉话率分别下降了约20％和30％。理论分析和仿真结果相符合。

The performance of dynamic channel assignment with queuing and guard channel strategies for handoff prioritization (DCA-GC-QH) are examined. By using the M/M/M/T Makov chain model, closed form expressions for the call blocking probability (Pb) and the handoff failure probability (Ph) have been proposed and evaluated respectively. In comparison with the guard channel and queuing strategies in fixed channel assignment for handoff prioritization (FCA-GC-QH), the Pb and Ph for the DCA-GC-QH scheme are reduced by more than 20% and 30%, respectively. In addition, the analytical results keep in line with its simulation.