Patent ID: 9553633
Date: 2017-01-24
CPC Classifications: H04B,H04J,H04L,H04W

Claim:
1. A user equipment comprising: receiving circuitry that receives, from a base station apparatus, a first parameter used to enable or disable a sequence group hopping, the receiving circuitry receiving, from the base station apparatus, a second parameter used to disable the sequence group hopping; and transmitting circuitry that transmits, to the base station apparatus, a demodulation reference signal associated with transmission of a physical uplink shared channel, a demodulation reference signal sequence of the demodulation reference signal being generated based on whether the sequence group hopping is enabled or disabled; wherein the sequence group hopping is enabled or disabled based on the first parameter regardless of the second parameter in a case that: the transmission of the physical uplink shared channel corresponds to a random access response grant, or the transmission of the physical uplink shared channel corresponds to a retransmission of a transport block in a random access procedure, the transmission of the physical uplink shared channel that corresponds to the retransmission of the transport block is indicated by using downlink control information to which cyclic redundancy check parity bits scrambled by a temporary cell-radio network temporary identifier are attached, and the downlink control information is used for a scheduling of the physical uplink shared channel in a cell.