Method and system for changing forward traffic channel power allocation during soft handoff
AssigneeQUALCOMM Incorporated
InventorEdward G. Tiedemann, Jr.
Life of this patent
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Abstract
A system and method for adjusting forward traffic channel power allocation in a communications system, wherein signal qualities of pilot channels respectively transmitted by multiple base stations in an active set of a mobile station, are measured by the mobile station, compared to a signal quality standard, and the comparison results reported to a system controller, thereby to indicate which of the pilots at the mobile station surpass the standard. The system controller then adjusts the forward channel power allocation based on the comparison results.
Claims10
A method for a communications system, comprising the steps of:
- identifying a plurality of base stations in an Active set of a mobile station in a handoff process among said plurality of base stations;
- measuring at said mobile station respective signal qualities of pilots respectively transmitted by said base stations in said Active set of said mobile station;
- comparing said respective signal qualities of said pilots to a standard, said standard determined in response to said signal quality of at least one of said pilots in said active set and a delta value of signal quality, wherein said delta value is a representative of a fixed signal level below a strongest pilot signal level of said pilots;
- determining which of said base stations are to transmit respective code channels to said mobile station and which are not to transmit respective code channels to said mobile station based on whether which of said pilots at said mobile station equal or surpass said standard in said handoff process among said plurality of base stations.
An apparatus for a communications system, comprising:
- means for identifying a plurality of base stations in an Active set of a mobile station in a handoff process among said plurality of base stations;
- means for measuring at said mobile station respective signal qualities of pilots respectively transmitted by said base stations in said Active set of said mobile station;
- means for comparing said respective signal qualities of said pilots to a standard, said standard determined in response to said signal quality of at least one of said pilots in said active set and a delta value of signal quality, wherein said delta value is a representative of a fixed signal level below a strongest pilot signal level of said pilots;
- means for determining which of said base stations are to transmit respective code channels to said mobile station and which are not to transmit respective code channels to said mobile station based on whether which of said pilots at said mobile station equal or surpass said standard in said handoff process among said plurality of base stations.
Dependencies are inferred from the claim text.