Patent ID: 9729288
Date: 2017-08-08
CPC Classifications: H04L,H04W

Claim:
1. A method of receiving a Physical Hybrid automatic repeat request Indicator Channel (PHICH) by a user equipment (UE) from a base station, the method comprising: transmitting multiple units of data to the base station through an uplink resource by using multiple antennas of the UE, wherein each of the multiple units of data corresponds to an index ‘i’, wherein ‘i’ is an integer; determining a PHICH resource to receive the PHICH carrying ACKnowledgement/Negative ACKnowledgement (ACK/NACK) with respect to each of the transmitted multiple units of data, wherein the PHICH resource for each of the multiple units of data (i) is identified by a pair of a PHICH group index (n wherein I PRB _ RA lowest _ index indicates the index for PHICH resource determination, n RS seq (i) indicates a cyclic shift value for demodulation reference signal, f(i) is defined to correspond to ‘i’, N PHICH group indicates the number of PHICH group, and I PHICH is 1 or 0 depending on configuration; and receiving the PHICH from the base station through the determined PHICH resource.