Abstract: A new kind of wireless network dynamic data rated handoff algorithm based on LBS information is presented in this paper，we judge the forthcoming data handoff call and reserve channels for data handoff traffic based on the LBS information and variable signal vector.The results of the simulation show that both Call Blocking Probability（CBP） and Call Drop Probability （CDP） reduce，and utility probability increases，the new handoff algorithm improves the QoS of the wireless call admission control （CAC）.

Key words: wireless multimedia networks, Call Block Probability（CBP）, Call Drop Probability（CDP）, Location-Based Services（LBS）, Mobile Terminal（MT）

摘要： 提出了一种新的无线网络中的基于位置服务信息的动态速率切换算法，根据LBS信息和信号变化矢量判断即将来临的数据切换呼叫并为其预留信道，兼顾数据业务的VBR特性而自适应动态改变其服务带宽。仿真的结果表明，与其他切换算法相比，新算法的呼叫强拆率和呼叫阻塞率均有下降，信道利用率得到提高，提高了无线呼叫接入控制系统的QoS。

关键词: 无线多媒体网络, 阻塞率, 强拆率, 基于位置服务, 移动终端