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US 8,265,630 B2Granted
Antenna adaptation to manage the active set to manipulate soft hand-off regions
AssigneeIPR Licensing, Inc.
InventorJames A. Proctor, Jr.
Life of this patent
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Abstract
A method of managing the number of base station engaged in soft hand-off in a mobile communication system. The method involves manipulating a subscriber based directional antenna so as to control the number of base transceiver stations, pilot channels, beacon signals or other signals detected to be used in soft hand-off processing. The adaptive antennas are modified to manage the number of active set members, such as by manipulating direction, beamwidth, or other antenna parameters.
Claims10
A mobile communication unit configured to manage an active set of radio channels used in soft hand-off processing, comprising:
- an adaptive antenna configured to detect pilot channel signals in a vicinity of the mobile unit, each pilot channel being transmitted from a separate base station;
- and
- a controller configured to:
- determine, based on a first parameter related to signal strength measurements of the pilot channel signals over a period of time, whether each of the separate base stations should be maintained in an active set;
- determine at least one parameter additional to the first parameter related to reliability of the pilot channel signal of each base station in the active set;
- select the pilot channel signal of one base station in the active set as a primary signal based on the at least one additional parameter;
- make a change in an antenna pattern of the adaptive antenna to optimize reception of the primary signal;
- and
- requalify the active set of base stations with the changed adaptive antenna pattern.
6 more elements
Dependencies are inferred from the claim text.