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AssigneeQUALCOMM Incorporated
InventorsMark S. Wallace, Edward G. Tiedemann, Jr., Charles E. Wheatley, III, J. Rod Walton, Steven J. Howard
Estimating the term…
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. 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. Given knowledge of the other base station locations, time errors relative to all other base stations 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 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 is placed at a location in the handoff region between the isolated cell and another cell in the network. The fixed mobile 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.
In a wireless communication system for providing two way communications between a plurality of base stations and a plurality of mobile stations, and wherein said plurality of base stations transmit information to said plurality of mobile stations on a forward link frequency band, and wherein said plurality of mobile stations transmit information to said plurality of base stations on a reverse link frequency band, a system for synchronizing the clocks of a first base station and a second base station comprising:
A base station comprising:
In a wireless communication system for providing two way communications between a plurality of base stations and a plurality of mobile stations, and wherein said plurality of base stations transmit information to said plurality of mobile stations on a forward link frequency band, and wherein said plurality of mobile stations transmit information to said plurality of base stations on a reverse link frequency band, a system for synchronizing the clocks of a first base station and a second base station comprising:
A base station comprising:
In a wireless communication system for providing two way communications between a plurality of base stations and a plurality of mobile stations, and wherein said plurality of base stations transmit information to said plurality of mobile stations on a forward link frequency band, and wherein said plurality of mobile stations transmit information to said plurality of base stations on a reverse link frequency band, a system for synchronizing the clocks of a first base station and a second base station comprising:
A system for synchronizing the clocks of a first base station and a second base station comprising:
Dependencies are inferred from the claim text.