Cell selection handoff for CDMA2000 1X advance

摘要

An apparatus for performing a soft handoff including a power estimator, cell selector, and feedback channel generator. The power estimator receives a plurality of pilot signals that each correspond to an associated base station within an active set registry, and estimates a power level for each of the plurality of pilot signals. The cell selector is coupled to the power estimator, and is configured to select one or more base stations within the active set registry for selective blanking of a corresponding one or more of the plurality of pilot signals during a soft handoff operation. The feedback channel generator is coupled to the cell selector, and is configured to generate a cell selection feedback signal indicating the one or more base stations, where the cell selection feedback signal is subsequently transmitted to the one or more base stations, and where the cell selection feedback signal directs the one or more base stations to perform the selective blanking.

主权项

1. A mobile apparatus wirelessly coupled to a plurality of base stations, comprising:
a power estimator, configured to estimate power levels for a plurality of pilot signals that correspond to the plurality of base stations in the mobile apparatus's active set; a cell selector, coupled to said power estimator, configured to select at least one of the plurality of base stations in the mobile apparatus's active set for blanking, in response to said power levels that were estimated, wherein said at least one of the plurality of base stations in the mobile apparatus's active set are indicated in a plurality of bits; and a feedback channel generator, coupled to said cell selector, configured to generate a plurality of cell selection feedback signals indicating the plurality of base stations in the mobile apparatus's active set, wherein each of said plurality of cell selection feedback signals is transmitted to the plurality of base stations in the mobile apparatus's active set, and wherein at least one of said plurality of cell selection feedback signals directs said at least one of the plurality of base stations in the mobile apparatus's active set to perform said blanking in transmission, and wherein said blanking is a temporary pause in transmission for a following prescribed number of power control groups from the at least one of the plurality of base stations that remain in the mobile apparatus's active set, and wherein the at least one of said plurality of cell selection feedback signals prescribes the following prescribed number of power control groups.