Patent ID: 6799016
Filing Date: 2004-09-28
Classification: H04W

Abstract:
In a wireless device, a method of creating a database of poor coverage areas in a wireless communication system, comprising:determining a coverage area corresponding to a location of the wireless device; determining if a signal quality metric of a communication link in the coverage area drops below a signal quality threshold; wherein if the signal quality metric is below the signal quality threshold designating the coverage area a poor coverage area and incrementing a poor coverage area counter corresponding to the poor coverage area and storing the coverage area as the poor coverage area in the database if the coverage area has not already been stored as the poor coverage area; determining if the poor coverage area is previously stored in the database, wherein if the poor coverage area is previously stored and the signal quality metric is below the signal quality threshold incrementing the poor coverage area counter corresponding to the poor coverage area, and wherein if the poor coverage area is previously stored and the signal quality metric is above the signal quality threshold incrementing a good coverage area counter corresponding to the poor coverage area; storing one or more previous coverage areas traversed by the wireless device prior to entering the poor coverage area; calculating and storing a trajectory to the poor coverage area based on the one or more previous coverage areas and the poor coverage area; and anticipating entry of the wireless device into the poor coverage area utilizing the trajectory to the poor coverage area.