Patent ID: 8391872
Filing Date: 2013-03-05
Classification: H04W

Abstract:
1. A method for a cellular wireless communication system that defines a plurality of sectors, the method comprising: detecting that calls on one or more first sectors tend to drop in a geographic area and that re-originations then tend to occur on a second sector that exhibits a threshold signal strength, wherein detecting that calls on one or more first sectors tend to drop in the geographic area and that re-originations then tend to occur on the second sector that exhibits the threshold signal strength comprises (i) determining that a mobile station experienced a call drop at a time when an active set of the mobile station included the one or more first sectors, (ii) determining a location of the mobile station at the time, and establishing as the geographic area an area bounding the determined location, (iii) determining that, within a threshold time period after the call drop, the mobile station originated a call on the second sector and that the second sector was not in the mobile station's active set at the time of the call drop, and (iv) determining that the mobile station reported a threshold high signal strength received on the second sector; in response to at least the detecting, establishing handoff trigger data that defines the geographic area as a trigger area for handoff to the second sector; and thereafter detecting that a call is underway in the trigger area and, based on the handoff trigger data, responsively triggering a handoff of the call to the second sector.