基于信道借用的无线异构网络信道分配方案  

The Channel Borrowing Based Channel Allocation Scheme for Heterogeneous Wireless Networks

作　　者：赵方明[1] 蒋铃鸽[1] 何晨[1] 

机构地区：[1]上海交通大学电子工程系,上海200240

出　　处：《上海交通大学学报》2008年第4期658-663,共6页Journal of Shanghai Jiaotong University

基　　金：国家自然科学基金资助项目(60372076)

摘　　要：在分析无线网络信道分配方案的基础上,提出一种适用于无线异构网络的信道借用方案,并运用闭合网络排队理论,从链接级QoS的角度作了性能分析.在信道水平借用的基础上,引入了垂直借用功能,借用功能仅限于切换业务,同时为了减少信道间干扰,小区之间的借用被限定在预先选好的信道之间.为了进一步提高系统的性能,在方案中引入了其他优先级策略.仿真结果表明,所提出的方案能够有效地降低阻塞率,改善系统性能.A channel allocation scheme on heterogeneous wireless networks was analyzed. By using closed network queuing theory, the channel borrowing scheme was studied for heterogeneous wireless networks in terms of the connection-level QoS. Channel allocation strategy using both horizontal channel borrowing （HCB） and vertical channel borrowing （VCB） was presented and analyzed. Channel borrowing is restricted within handoff requests. To decrease channel interference, only pre-defined channels can be lent. To further improve the system performance, other priority strategies were introduced. The simulation results show that the proposed schemes can lower blocking probabilities and improve system performance.

关 键 词：无线异构网络 信道分配 信道水平借用 信道垂直借用 阻塞率 

分 类 号：TN929.5[电子电信—通信与信息系统]