Patent ID: 9025556
Filing Date: 2015-05-05
Classification: H04W

Abstract:
1. A method in a wireless terminal transceiver of a orthogonal frequency division multiplexing (OFDMA) system, the method comprising: receiving, at the wireless terminal transceiver, a sequence of frames from a first base station of the OFDMA system, each frame in the sequence containing a first set of time-frequency resources which are used for scheduling data and a second set of time-frequency resources different from the first set of time-frequency resources, wherein the first set of time-frequency resources and the second set of time-frequency resources do not overlap in time; receiving, at the wireless terminal transceiver, a message from the first base station identifying a third set of time-frequency resources that is a subset of the first set of time-frequency resources; and estimating a channel state based on the transmission received in the third set of time-frequency resources.