Reference signal transmission method, mobile station apparatus and base station apparatus

摘要

To efficiently use radio resources used in transmission of SRS, a base station apparatus (eNode B) transmits a scheduling grant including an instruction for transmission of a Sounding Reference Signal (SRS), and a mobile station apparatus (UE) transmits the SRS in response to the scheduling grant. The SRS is transmitted in the same subframe, another subframe or a previous subframe by the predetermined number of subframes as, immediately before, or before a subframe of a PUSCH (Physical Uplink Shared Channel) that the scheduling grant instructs to transmit.

主权项

1. A reference signal transmission method comprising:
transmitting an uplink scheduling grant including an instruction for transmission of a Sounding Reference Signal (SRS), from a base station apparatus; and transmitting the SRS from a mobile station apparatus, in response to the instruction for transmission of the SRS included in the uplink scheduling grant, wherein the mobile station apparatus transmits the SRS, in a subframe of the Physical Uplink Shared Channel (PUSCH) which the uplink scheduling grant instructs to transmit or in a first SRS-transmittable subframe among later subframes by a predetermined number of subframes after the subframe of the PUSCH.