摘要
研究了无线数据网络中的信道分配策略,提出了基于信干比(Signal to Interference Ratio,SIR)的动态信道分配(Dynamic Channel Assignment,DCA),通过判断用户的SIR情况来分配空闲信道,并且建立了无线数据网络的排队论模型。仿真分析了网络的呼叫延迟概率和呼叫延迟超时概率这两个重要的性能指标,结果显示在系统高负载情况下,本文提出的基于SIR的DCA相对于传统的信道分配方法能够获得更好的效果,从而实现了对高负载网络的优化。
This paper mainly studies channel assignment in wireless data network. An SIR （Signal to Interference Ratio）-based DCA （Dynamic Channel Assignment） scheme is proposed, which implements channel assignment according to the SIR of each subscriber. Then, a network model based on queuing theory is established. Simulations are made to analyze call delaying probability and timeout probability of the network. The results indicate that the novel DCA scheme outperforms those traditional ones at heavy loads, which can be used to optimize the network in such conditions.
出处
《信息与电子工程》
2006年第6期406-411,共6页
information and electronic engineering
关键词
无线数据网络
信道分配
SIR
服务等级
呼叫延迟
wireless data network
channel assignment
SIR
GOS（Grade Of Service）
call delaying
