Patent ID: 7212823
Filing Date: 2007-05-01
Classification: H04W

Abstract:
1. A method of operating a wireless communication network, in which a communications device communicates with the network, the method comprising: establishing a first common channel and a second dedicated channel for communication between a communications device and a wireless network, the second channel comprising a dedicated uplink channel and a dedicated downlink channel, wherein an initial power level for the dedicated downlink channel is set higher than is necessary; and in order to switch transmissions from the first common channel to the second dedicated channel; transmitting a preamble signal from the communications device to the network on said dedicated uplink channel, wherein the preamble signal increases in power during transmission; in the network, attempting to detect the transmitted preamble signal on said dedicated uplink channel; and in response to successful detection of the transmitted preamble signal, establishing a connection on said second dedicated channel.