摘要
该文提出了无线移动多媒体通信网中基于宽带呼叫业务和窄带呼叫业务的双向层间切换业务模型(BLHM)和单向层间切换业务模型(SLHM),分别研究了两种业务在模型中的新呼叫阻塞概率和切换呼叫失败概率,对由于层间切换机制带来的呼叫业务质量(QoS)下降的宽带切换呼叫进行了定量分析。另外,该文还提出了基于呼叫业务代价函数和呼叫业务QoS的信道分配算法。最后进行了计算机仿真,将两种模型的性能进行了比较。
This paper presents two inter-layer hand-over models based on wireless mobile multimedia services including wide-band service and narrow-band service. One is bi-directional inter-layer hand-over model, the other is single-directional inter-layer model. The new call blocking probability and the hand-over call failure probability are analyzed. The QoS degradation of wide-band hand-over calls due to the inter-layer hand-over between macro-cell layer and micro-cell layer is presented in details. Also, an algorithm on channel allocation based on this hand-over policy is described. Finally, analysis and simulation results are compared to testify the hand-over policy submitted above.
出处
《电子与信息学报》
EI
CSCD
北大核心
2002年第8期1080-1087,共8页
Journal of Electronics & Information Technology
