Patent ID: 8571091

Claim:
A method, comprising: selectively receiving packets in a half duplex transceiver from a downlink in a downlink window having a predetermined number M of downlink sub frames; shifting to a transmit mode in a sub frame; selectively transmitting packets from the half duplex transceiver on an uplink in an uplink window having a predetermined number N of sub frames; shifting to a receive mode in a sub frame; repeating the selectively receiving, shifting to a transmit mode, selectively transmitting, shifting, in a continuous cycle of sub frames and frames comprised of multiple sub frames; entering a discontinuous reception mode where power is conserved by reducing power to the transceiver for a predetermined number of discontinuous reception sub frames; detecting an end to the predetermined number of discontinuous reception sub frames; determining whether the present time coincides with an uplink sub frame; if the determining is negative, exiting the discontinuous reception mode and receiving a packet data control channel message; and if the determining is positive, remaining in the discontinuous reception mode for an additional M+1 sub frames and then exiting the discontinuous reception mode in a downlink sub frame and receiving a packet data control channel message.