公开(公告)号：WO0035117A3

公开(公告)日：2001-01-04

申请号：PCT/US9928705

申请日：1999-12-03

Applicant: QUALCOMM INC

Inventor： WALLACE MARK S ,  TIEDEMANN EDWARD G JR ,  WHEATLEY CHARLES E III ,  WALTSON J ROD

IPC: H04B7/24 ,  H04B7/26 ,  H04L7/00 ,  H04L7/08 ,  H04Q7/36

CPC classification number: H04B7/2696

Abstract: When insufficient traffic is present in the network to maintain synchronization in this manner, other methods must be used. One approach involves making direct measurements of the timing between base stations (602, 604). This is accomplished in one of two ways. The base may interrupt its transmissions on all sectors for a short interval during which it determines the time of arrival of signals from other base stations (602, 604). Given knowledge of the other base station locations, time errors relative to all other base stations (602, 604) may be derived. Alternatively, the base may send a short signal at high power in the mobile transmit band. This time-of-arrival of this signal is measured by the surrounding base stations and the time errors between pairs of base stations are computed. In some cases, a base station (602, 604) may be isolated sufficiently from all other base stations in the network such that direct base-to-base measurement is not viable. In this case, a fixed mobile (606) is placed at a location in the handoff region between the isolated cell and another cell in the network. The fixed mobile (606) either performs measurements of base station pilots on command of the base and reports the timing information, or sends a burst transmission at a specified time and power level to be measured by the base stations.

Abstract translation: 当网络中不足够的流量以这种方式维持同步时，必须使用其他方法。 一种方法涉及对基站（602,604）之间的定时进行直接测量。 这是通过两种方式之一实现的。 基站可以在其间确定来自其他基站（602,604）的信号的到达时间的短间隔中断其在所有扇区上的传输。 考虑到其他基站位置的知识，可以导出相对于所有其他基站（602,604）的时间误差。 或者，基站可以在移动发射频带中以高功率发送短信号。 该信号的到达时间由周围的基站测量，并且计算基站对之间的时间误差。 在一些情况下，基站（602,604）可以与网络中的所有其他基站充分隔离，使得直接基站到基站测量不可行。 在这种情况下，固定移动台（606）被放置在隔离小区与网络中的另一个小区之间的切换区域的位置。 固定移动台（606）可以根据基地台的指令进行基站导频的测量，并报告定时信息，或者在指定的时间和功率水平上发送要由基站测量的突发传输。