Mobile station time reference that is adjusted based on propagation delay

摘要

A mobile station receives system time information from a source base transceiver station (BTS) in a spread spectrum communication system. The mobile station estimates a distance between the mobile station and the source BTS. The mobile station calculates a propagation delay based on the estimated distance. The mobile station develops a propagation-delay-adjusted time reference based on the system time information and the calculated propagation delay. The mobile station uses the propagation-delay-adjusted time reference to search for a target pseudonoise (PN) offset corresponding to a target BTS in the spread spectrum communication system. The mobile station may be closer to the target BTS than the source BTS.

主权项

1. A method, comprising:
a mobile station receiving system time information from a source base transceiver station (BTS) in a spread spectrum communication system; said mobile station estimating a distance between said mobile station and said source BTS; said mobile station identifying a PN offset for a pilot signal transmitted by a target BTS; said mobile station calculating a propagation delay based on said estimated distance; said mobile station developing a propagation-delay-adjusted time reference based on said system time information and said calculated propagation delay; and said mobile station searching for said target BTS in said spread spectrum communication system at said PN offset measured from said propagation-delay-adjusted time reference.