Patent ID: 9191895
Filing Date: 2015-11-17
Classification: H04L,H04W,Y02D

Abstract:
1. 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 UEs assume one of at least two states, the 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 the alternating includes scheduling occasions at which the UE goes from the non-listening state to the listening state to correspond to expected first transmissions of data from the controlling node; wherein as a further aspect of the alternating: wherein, if the UE transmits an ACK, the UE extends its stay in the listening state by a predefined period of time, to ensure that the UE does not receive any retransmission from the controlling node during the time that a retransmission would have been performed if an ACK transmitted by the UE had been misread by the controlling node as a NACK.