GCQCP based vertical handoff scheme for heterogeneous hierarchical wireless networks

摘要：

A handoff scheme based on guard channel, queuing and channel preemption (GCQCP) is proposed to guarantee the QoS of handoff traffic in the heterogeneous hierarchical wireless networks. On the basis of bidirectional call-overflow between different networks, guard channels are set for realtime traffic handoffs and buffer queues are set for nonrealtime traffic handoffs. In order to further decrease the call dropping probability of real-time traffic handoffs, channel preemption is also used, which principle is that real time traffic handoff calls can preempt the channel resources occupied by the nonreal-time traffic. Simulation results show that the proposed handoff control scheme can remarkably decrease the dropping probability of real-time traffic handoffs, the channel utilization of overall heterogeneous system is slightly increased simultaneously.

关键词： heterogeneous hierarchical wireless networks handoff quality of service resource preemption

作者: Guoqin Ning Jing Zhang Gan Liu Guangxi Zhu

作者单位: Department of Information Technology Huazhong Normal University, Wuhan, China Wuhan National Laboratory of Optoelectronics, Huazhong University of Science and Technology, Wuhan,

会议类型: 国际会议

会议名称: 第三届IEEE无线通讯、网络技术暨移动计算国际会议

会议地点: 上海

会议语种:英文

在线出版日期: 2007-09-21（万方平台首次上网日期，不代表论文的发表时间）