DEVICE FOR SYNCHRONIZING BASE STATIONS (VARIANTS); BASE STATION; DEVICE FOR SYNCHRONIZING TIMING PULSE GENERATORS OF BASE STATIONS; SYSTEM FOR SYNCHRONIZING TIMING PULSE GENERATORS OF BASE STATIONS (VARIANTS)

摘要

When insufficient traffic is present in the network to maintain synchronization in this manner, other methods mast be used. One approach involves making in 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 stations (602. 604) may be derived. Alternative, the base may send a signal of high power in the mobile transmit band. This line-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 sense that direct base-to-base measurement is not viable. In the 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 running information, or sends a burst transmission at a specified time and power level to be measured by the base stations.