Patent ID: 9125229
Filing Date: 2015-09-01
Classification: H04B,H04W

Abstract:
1. A method for operating a communication system, the communication system comprising a primary station and at least one secondary station, the method comprising: the primary station selecting a transmission mode from a set of at least two transmission modes for communicating with the at least one secondary station, the at least one secondary station inferring the transmission mode selected by the primary station based on at least one control channel characteristic, wherein the at least one control channel characteristic is a transmission rank indication used by the at least one secondary station to infer the selected transmission mode, and the at least one secondary station inferring that the transmission mode selected by the primary station is a first transmission mode if the transmission rank exceeds a first predetermined number M, and the at least one secondary station inferring that the transmission mode selected by the primary station is a second transmission mode if the transmission rank is less than a second predetermined number N.