Patent ID: 8675568

Claim:
A method for use in a cellular wireless access system in which a controlling node controls transmissions to and from user terminals (UEs) within a certain area, and in which the UEs assume one of at least two states including a first non-listening state wherein a UE does not listen for data from its controlling node, and a second listening state, the method comprising: a UE alternating between the two states in dependence on whether or not data units which are transmitted between the UE and the controlling node are received entirely and correctly within an initially allocated resource for each data unit, as allocated by the controlling node; wherein when the UE transmits a NACK to the controlling node to indicate that a downlink transmission of data from the controlling node was not properly received, the UE resides in the non-listening state between a time of transmission of the NACK and a time when a downlink retransmission of the data from the controlling node is expected.