Method and apparatus for transmitting SRS in wireless cellular mobile communication system
The present invention relates to a method for transmitting, by a terminal, a sounding reference signal (SRS) or a physical uplink shared channel (PUSCH) in a mobile communication system. A communication method for a terminal in a communication system which supports the combination of configuration carrier using FDD scheme and configuration carrier using TDD scheme, in accordance with an embodiment of the present invention, comprises the steps of: receiving SRS transmission setting information from a base station; receiving uplink data scheduling information from the base station; determining whether or not the simultaneous transmission of the SRS transmission and the uplink data occurs; and setting the transmission of the uplink data or the SRS so that when the simultaneous transmission of the SRS transmission and the uplink data occurs, the sum of the respective transmission powers of the first and second symbols in an FDD cell and the first and second symbols of a TDD cell is not greater than the maximum transmission power of the terminal, wherein the timing of the first symbol in the FDD cell corresponds to the timing of the first symbol in the TDD cell, and the timing of the second symbol in the FDD cell corresponds to the timing of the second symbol in the TDD cell. In accordance with an embodiment of the present invention, defining the SRS transmission method of the terminal in a wireless communication system causes the terminal to effectively transmit the uplink data.
1. A method of a terminal 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 a first cell, the first cell operating in a time division duplex (TDD) mode;
identifying whether an uplink data transmission on a second cell in a first subframe overlaps with the SRS transmission on the first cell in the first subframe, the second cell operating in a frequency division duplex (FDD) mode;
in a case that the uplink data transmission on the second cell in the first subframe overlaps with the SRS transmission on the first cell in the first subframe, transmitting, by the terminal, the SRS on a second symbol in the UpPTS on the first cell in the first subframe; and
transmitting, by the terminal, uplink data on the second cell on a plurality of symbols except a last symbol in the first subframe,
wherein the SRS transmission on a first symbol in the UpPTS on the first cell in the first subframe is omitted by the terminal.
2. The method of claim 1 , further comprising:
identifying that an uplink control information transmission on the second cell in a second subframe overlaps with an SRS transmission on the first cell in the second subframe;
identifying whether a shortened physical uplink control channel (PUCCH) format is configured to be used; and
in a case that the shortened PUCCH format is configured to be used, transmitting, by the terminal, the SRS on a second symbol in the UpPTS on the first cell in the second subframe.
3. The method of claim 2 , further comprising:
transmitting, by the terminal, uplink control information using the shortened PUCCH format on the second cell in the second subframe.
4. The method of claim 2 , further comprising:
in a case that the shortened PUCCH format is not configured to be used, transmitting, by the terminal, uplink control information on the second cell in the second subframe.
5. A method by a base station for receiving a signal, the method comprising:
transmitting, to a terminal, information for configuring an SRS transmission on two symbols in an uplink pilot time slot (UpPTS) on a first cell, the first cell operating in a time division duplex (TDD) mode;
receiving, from the terminal, the SRS on a second symbol in the UpPTS on the first cell in a first subframe, in a case that an uplink data transmission on a second cell in the first subframe overlaps with the SRS transmission on the first cell in the first subframe; and
receiving, from the terminal, uplink data on the second cell on a plurality of symbols except a last symbol in the first subframe, the second cell operating in a frequency division duplex (FDD) mode,
wherein the SRS transmission on a first symbol in the UpPTS on the first cell in the first subframe is omitted by the terminal.
6. The method of claim 5 , further comprising:
receiving, from the terminal, the SRS on a second symbol in the UpPTS on the first cell in a second subframe, in a case that an uplink control information transmission on the second cell in the second subframe overlaps with an SRS transmission on the first cell on the second subframe and a shortened physical uplink control channel (PUCCH) format is configured to be used.
7. The method of claim 6 , further comprising:
receiving, from the terminal, uplink control information using the shortened PUCCH format on the second cell in the second subframe.
8. The method of claim 5 , further comprising:
receiving, from the terminal, uplink control information on the second cell in a second subframe, in a case that an uplink control information transmission on the second cell in the second subframe, overlaps with an SRS transmission on the first cell on the second subframe and a shortened physical uplink control channel (PUCCH) format is not configured to be used.
9. A terminal for transmitting a sounding reference signal (SRS), the terminal comprising:
a transceiver configured to transmit and receive a signal; and
a controller coupled with the transceiver and configured to control to:
receive, from a base station, information for configuring an SRS transmission on two symbols in an uplink pilot time slot (UpPTS) on a first cell, the first cell operating in a time division duplex (TDD) mode,
identify whether an uplink data transmission on a second cell in a first subframe overlaps with the SRS transmission on the first cell in the first subframe, the second cell operating in a frequency division duplex (FDD) mode,
in a case that the uplink data transmission on the second cell in the first subframe overlaps with the SRS transmission on the first cell in the first subframe, transmit the SRS on a second symbol in the UpPTS on the first cell in the first subframe, and
transmit uplink data on the second cell on a plurality of symbols except a last symbol in the first subframe,
wherein the SRS transmission on a first symbol in the UpPTS on the first cell in the first subframe is omitted by the terminal.
10. The terminal of claim 9 , wherein the controller is further configured to control to:
identify that an uplink control information transmission on the second cell in a second subframe overlaps with an SRS transmission on the first cell in the second subframe,
identify whether a shortened physical uplink control channel (PUCCH) format is configured to be used, and
in a case that the shortened PUCCH format is configured to be used, transmit the SRS on a second symbol in the UpPTS on the first cell in the second subframe.
11. The terminal of claim 10 , wherein the controller is further configured to control to transmit uplink control information using the shortened PUCCH format on the second cell in the second subframe.
12. The terminal of claim 10 , wherein the controller is further configured to control to transmit uplink control information on the second cell in the second subframe, in a case that the shortened PUCCH format is not configured to be used.
13. A base station for receiving a sounding reference signal (SRS), the base station comprising:
a transceiver configured to transmit and receive a signal; and
a controller coupled with the transceiver and configured to control to:
transmit, to a terminal, information for configuring an SRS transmission on two symbols in an uplink pilot time slot (UpPTS) on a first cell, the first cell operating in a time division duplex (TDD) mode,
receive, from the terminal, the SRS on a second symbol in the UpPTS on the first cell in a first subframe, in a case that an uplink data transmission on a second cell in the first subframe overlaps with the SRS transmission on the first cell in the first subframe, and
receive, from the terminal, uplink data on the second cell on a plurality of symbols except a last symbol in the first subframe the second cell operating in a frequency division duplex (FDD) mode,
wherein the SRS transmission on a first symbol in the UpPTS on the first cell in the first subframe is omitted by the terminal.
14. The base station of claim 13 , wherein the controller is further configured to control to receive, from the terminal, the SRS on a second symbol in the UpPTS on the first cell in a second subframe, in a case that an uplink control information transmission on the second cell in the second subframe, overlaps with an SRS transmission on the first cell on the second subframe and a shortened physical uplink control channel (PUCCH) format is configured to be used.
15. The base station of claim 14 , wherein the controller is further configured to control to receive, from the terminal, uplink control information using the shortened PUCCH format on the second cell in the second subframe.
16. The base station of claim 13 , wherein the controller is further configured to control to receive, from the terminal, uplink control information on the second cell in a second subframe, in a case that an uplink control information transmission on the second cell in the second subframe overlaps with an SRS transmission on the first cell on the second subframe and a shortened physical uplink control channel (PUCCH) format is not configured to be used.