Patent ID: 7376104
Filing Date: 2008-05-20
Classification: H04W

Abstract:
1. A re-selection method for switching a packet data session from a first packet data channel in one cell of a cellular communication network to a second packet data channel in another cell comprising: beginning a packet data session on a packet data channel in a first cell of said network; during said packet data session, monitoring the channel quality of adjacent control channels in adjacent cells to identify one or more adjacent cells as potential re-selection candidates; during said packet data session and prior to determining that a cell re-selection procedure is required, reading broadcast information on a control channel identified as a potential re-selection candidate to prospectively obtain two or more parameters required to establish a new packet data channel for that cell, the two or more parameters being selected from the group consisting of system identification information, channel-specific access parameters, protocol parameters, neighbor list for that cell, the corresponding serving cell's coincidental DCCH pointers, and routing area identity; when a predetermined re-selection criteria is met, selecting a new cell from the potential re-selection candidates, and establishing a new packet data channel using the two or more parameters prospectively obtained from the control channel corresponding to the new cell; and resuming the packet data session on said new packet data channel.