Patent ID: 7308264
Filing Date: 2007-12-11
Classification: H04W

Abstract:
1. A method for operating a wireless transmit/receive unit (WTRU) in a wireless communication system comprising a plurality of cells, the WTRU comprising a switched beam antenna for generating antenna beams including a plurality of directional beams and an omni-directional beam, the method comprising: Using a selected antenna beam for exchanging data with a cell in an active set of cells; receiving signals from cells not in the active set of cells using the selected antenna beam; measuring the received signals from each cell not in the active set of cells for the selected antenna beam; comparing the measured signals to an add pre-candidate set threshold, and adding the corresponding cells to a pre-candidate set of cells based upon the comparison; ranking the cells in the pre-candidate set of cells based upon a level of their measured signals; receiving signals from N of the top-ranked cells in the pre-candidate set of cells using the omni-directional beam and the selected antenna beam, with N being greater than or equal to 1; measuring the received signals from each of the N cells for the omni-directional beam and the selected antenna beam; comparing the measured signals to an add candidate set threshold, and moving the corresponding cells from the pre-candidate set of cells to the candidate set of cells based upon the comparison to the add candidate set threshold; and sending a measurement report to the network.