Patent ID: 9118445
Filing Date: 2015-08-25
Classification: H04B,H04L,H04W

Abstract:
1. A method for transmitting signals at a User Equipment (UE) in a multi-antenna wireless communication system, the method comprising: receiving an uplink grant from a Base Station (BS); transmitting transport blocks and Reference Signals (RSs) for the transport blocks via a plurality of layers based on the uplink grant to the BS; receiving Negative ACKnowledgment (NACK) information for at least one transport block among the transport blocks from the BS; and retransmitting the at least one transport block and the RS for the at least one transport block via at least one layer to the BS, wherein, if a number of the at least one transport block for retransmission is not equal to a number of the transport blocks indicated by the uplink grant, resources of the RS for the at least one transport block for the retransmission are configured based on a cyclic shift field included in the uplink grant and a number of the at least one layer, wherein, if the number of the at least one transport block for the retransmission is equal to the number of the transport blocks indicated by the uplink grant, the resources of the RS for the at least one transport block for the retransmission are the same as the resources of the RS for the transport blocks indicated by the uplink grant, and wherein the resources of the RS comprise a cyclic shift value and an Orthogonal Cover Code (OCC) value.