Patent ID: 8462746
Filing Date: 2013-06-11
Classification: H04L,H04W,Y02D

Abstract:
1. A terminal for use in a wireless network, the terminal comprising: a radio frequency (RF) receiver, which is configured to receive a RF signal transmitted by an evolved NodeB (eNodeB) in accordance with a Third Generation Partnership Project-Long Term Evolution (3GPP-LTE) standard over a wireless channel and to downconvert the RF signal so as to generate an output signal, the RF signal comprising downlink frames, each downlink frame comprising at least an allocation zone followed by a data zone, the allocation zone containing Physical Downlink Control Channel (PDCCH) symbols providing an indication of a time allocation in the data zone during which downlink data will be transmitted to the terminal; an analog/digital (A/D) converter, which is coupled to convert the output signal into a stream of digital samples; and a digital processing circuit, which is coupled to process the digital samples of the PDCCH symbols transmitted in the allocation zone of at least one downlink frame so as both to identify the time allocation and to estimate one or more characteristics of the wireless channel in order to calculate a margin as a function of the estimated characteristics, and then to process the digital samples in the data zone of the downlink frame so as to recover the downlink data transmitted during the identified time allocation, and to shut down the RF receiver at a shut-down time that follows an end time of the time allocation in the downlink frame by the margin.