发明授权
- 专利标题： Slewing detector system and method for the introduction of hysteresis into a hard handoff decision
- 专利标题（中）： 回转检测器系统和将迟滞引入硬切换决策的方法
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申请号： US09620374申请日： 2000-07-20
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公开(公告)号： US06826161B1公开(公告)日： 2004-11-30
- 发明人: Reza Shahidi , Octavio Jose De Franca Lima , Jen M. Chen , Long L. Duan , Tom T. Sesnic
- 申请人： Reza Shahidi , Octavio Jose De Franca Lima , Jen M. Chen , Long L. Duan , Tom T. Sesnic
- 主分类号： H04Q720
- IPC分类号： H04Q720
摘要：
A method for introducing hysteresis into a hard handoff decision in code division multiple access (CDMA) communications following an initial hard handoff is provided. The method introduces hysteresis when it is determined that the communicating mobile station system clock is slewing. The slewing determination follows from a calculation of the rate of change in the round trip delay (RTD) in communications with the mobile station. A calculated RTD rate of change is compared with a RTD slewing threshold, where the RTD threshold is the assumed slew rate of the mobile station. Hard handoffs are suspended as long as the calculated RTD rate of change exceeds the RTD slewing threshold. A system and apparatus to implement the above-described method are also provided.
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