公开(公告)号：US20010026540A1

公开(公告)日：2001-10-04

申请号：US09880977

申请日：2001-06-14

Applicant: InterDigital Technology Corporation, a Delaware Corporation

Inventor： John W. Haim

IPC: H04Q007/00

CPC classification number: H04W52/60 ,  H04B1/707 ,  H04B1/7075 ,  H04B1/70753 ,  H04B1/70755 ,  H04B1/70758 ,  H04B1/7077 ,  H04B1/708 ,  H04B7/2628 ,  H04B2201/70701 ,  H04B2201/70702 ,  H04B2201/70703 ,  H04B2201/70707 ,  H04B2201/7071 ,  H04W52/36 ,  H04W52/362 ,  H04W52/367 ,  H04W52/50

Abstract: A system and method reduces the time required by a base station to acquire a fixed subscriber unit in a CDMA communication system by virtually locating of the subscriber units. A base station acquires subscriber units by searching only those code phases concomitant with the largest propagation delay possible in the cell, as if all subscriber units were located at the periphery of the cell. A subscriber unit which has never been acquired by the base station varies the delay between the PN code phase of its received and transmitted signals over the range of possible delays in a cell and slowly ramps-up its transmission power until it is acquired by the base station. Upon initial acquisition by the base station, the subscriber unit ceases ramping-up its transmission power, ceases varying the delay and internally stores the final value of the delay in memory.

Abstract translation: 系统和方法通过虚拟地定位用户单元来减少基站在CDMA通信系统中获取固定用户单元所需的时间。 基站仅通过仅在那些小区中搜索可能的最大传播延迟的那些码相位来搜索那些码相位，好像所有的用户单元都位于小区的外围。 基站从未被采集的用户单元在单元中的可能延迟的范围内改变其接收和发送的信号的PN码相位之间的延迟，并缓慢地增大其发送功率，直到由基站 站。 在基站首次采集时，用户单元停止其发送功率的上升，停止改变延迟，并在内存中将延迟的最终值存储在存储器中。