CPC H04L 5/0051 (2013.01) [H04B 7/2615 (2013.01); H04L 5/0016 (2013.01); H04L 5/14 (2013.01); H04W 52/146 (2013.01); H04W 52/325 (2013.01); H04W 52/34 (2013.01); H04W 52/367 (2013.01); H04W 72/1268 (2013.01); H04L 5/001 (2013.01); H04L 5/0048 (2013.01); H04L 5/1469 (2013.01)] | 4 Claims |
1. A method of a terminal configured with a first cell and a second cell for transmitting a sounding reference signal (SRS) the method comprising:
receiving, from a base station, information for configuring an SRS transmission on two symbols in an uplink pilot time slot (UpPTS) on the first cell by higher layer signaling, the first cell operating in a time division duplex (TDD) mode;
determining that an uplink control information transmission on the second cell overlaps with the SRS transmission on the first cell in a first subframe in terms of time, the second cell operating in a Frequency Division Duplex (FDD) mode;
identifying whether a shortened physical uplink control channel (PUCCH) format is used to transmit the uplink control information;
in a case that the shortened PUCCH format is used:
transmitting, to the base station, the SRS on a second symbol in the UpPTS and dropping the SRS transmission on a first symbol in the UpPTS in the first subframe on the first cell; and
transmitting, to the base station, uplink control information using the shortened PUCCH format on a plurality of symbols except a last symbol in the first subframe on the second cell;
in a case that the shortened PUCCH format is not used:
transmitting, to the base station, uplink control information in the first subframe on the second cell; and
dropping the SRS transmission in the first subframe on the first cell; and
in a case that an uplink data transmission on the second cell overlaps with the SRS transmission on the first cell in a second subframe, transmitting, to the base station, the SRS on a second symbol in the UpPTS in the second subframe on the first cell and uplink data on a plurality of symbols except a last symbol in the second subframe on the second cell.
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