Patent ID: 8934429
Filing Date: 2015-01-13
Classification: H04B,H04L,H04W

Abstract:
1. A wireless communication system comprising: a base station apparatus; and a mobile station apparatus, wherein the base station apparatus and the mobile station apparatus are configured to or configured to and programmed to communicate with each other, the base station apparatus configured to or configured to and programmed to transmit downlink control information to the mobile station apparatus, the downlink control information including at least first information indicating at least a number of layers which are used by the mobile station apparatus to transmit a PUSCH, and second information indicating a cyclic shift and an orthogonal code sequence for each of the layers, the second information being determined from a plurality of predetermined information which comprise: the second information being a field of 3 bits in the downlink control information, the mobile station apparatus configured to or configured to and programmed to receive the downlink control information, to identify, based on at least the second information, the cyclic shift and the orthogonal code sequence for each of the layers, to generate a demodulation reference signal for each of the layers based on the cyclic shift and the orthogonal code sequence, and to transmit the generated demodulation reference signal for each of the layers to the base station apparatus.