环形无线网络呼叫接入控制模型研究
Study on call admission control model of ring wireless networks
-
摘要: 针对正交频分复用的无线网络中,当用户靠近基站覆盖区域的边缘且需切换通话时,传统排队模型切换失败率较高的问题,提出了在基站覆盖区域里建立一个多环呼叫接入控制模型的方案:将蜂窝设置在同心圆中,通过从所需的资源量中建立移动用户的信元平衡方程来降低切换失败率.仿真结果表明,该模型可降低切换失败率,提高资源利用率.Abstract: In the orthogonal frequency division multiplexing wireless network (OFDM),when the user close to the edge of the base station coverage area,if you want to switch the call,the traditional queuing models switching have a higher failure rate.A new call admission control model based on the ring was established in a coverage area with cover of the base station,cellular will set in concentric circles,though the amount of resources required to establish the cell balance equation of the mobile users,to reduce switch failure rate.The simulation results showed that the model reduces switch failure rate in the protection channel,and improves resource utilization.
-
Key words:
- call admission control /
- queuing model /
- cell balance equation /
- ring wireless metworks
-
-
[1]
Niyato D,Hossain E.Call admission control for QoS provisioning in 4G wireless networks:Issues and approaches[J].IEEE Network,2005,19(5):5.
-
[2]
Tao M,Liang Y C,Zhang F.Resource allocation for delay differentiated traffic in multiuser OFDM systems[J].IEEE Trans Wireless Commun,2008,7(6):2109.
-
[3]
Shen Z,Andrews J G,Evans B L.Adaptive resource allocation in multiuser OFDM systems with proportional fairness[J].IEEE Trans Wireless Commun,2005,4(6):2726.
-
[4]
Ali S H,Lee Ki-Dong,Leung V C M.Dynamic resource allocation in OFDMA wireless metropolitan area networks[J].IEEE Wireless Commun,2007,14(1):6.
-
[5]
Rong Bo,Qian Yi,Lu Kejie.Integrated downlink resource management for multiservice WiMAX networks[J].IEEE Transactions on Mobile Comp,2007,6(6):621.
-
[6]
Ramjee R,Nagarajan R,Towsley D.On optimal call admission control in cellular networks[J].Wireless Networks,1997,3(1):29.
-
[7]
Majid G,Raouf B.Call admission control in mobile cellular networks a comprehensive survey[J].Wireless Commun and Mobile Comp,2006,6(1):69.
-
[8]
Rhee W,Cioffi J M.Increase in capacity of multiuser OFDM system using dynamic subchannel allocation[C]//Proc IEEE VTC,Tokyo:IEEE Press,2000:1085-1089.
-
[1]
-
点击查看大图
计量
- PDF下载量: 12
- 文章访问数: 932
- 引证文献数: 0
下载:
