Method and apparatus for transmitting a sounding reference signal
The present invention relates to a method for transmitting a sounding reference signal and to an apparatus for said method. More particularly, the present invention relates to a method for transmitting a sounding reference signal and to an apparatus for said method, wherein the method comprising the following steps: receiving sounding reference signal parameters; allocating a wireless resource using the sounding reference signal parameters; and transmitting a sounding reference signal via the wireless resource, wherein said sounding reference signal is transmitted using a portion of a period of a single carrier-frequency division multiple access (SC-FDMA) symbol.
1. A method for transmitting an uplink reference signal at a user equipment (UE) in a wireless communication system comprising a relay node, the method comprising:
receiving, by the UE, sounding reference signal (SRS) parameters;
allocating, by the UE, radio resources using the sounding reference signal (SRS) parameters; and
transmitting, by the UE, a sounding reference signal (SRS) using the radio resources,
wherein, when a specific transmission timing offset is configured for the UE, the sounding reference signal (SRS) is transmitted using only a portion of a single carrier-frequency division multiple access (SC-FDMA) symbol, and
wherein, when the specific transmission timing offset is not configured for the UE, the sounding reference signal (SRS) is transmitted using the SC-FDMA symbol.
2. The method according to claim 1 , wherein, when the specific transmission timing offset is configured for the UE, the sounding reference signal (SRS) is transmitted using one of half portions of the SC-FDMA symbol.
3. The method according to claim 2 , wherein the sounding reference signal (SRS) is transmitted using a front half portion of the SC-FDMA symbol, and the front half portion is comprised of a short block (SB) having subcarrier spacing that is two times larger than that of a symbol including no SRS.
4. The method according to claim 2 , wherein the sounding reference signal (SRS) is transmitted using a rear half portion of the SC-FDMA symbol, and the rear half portion is comprised of a short block (SB) having subcarrier spacing that is two times larger than that of a symbol including no SRS.
5. The method according to claim 1 , wherein the SRS parameters include a parameter indicating
a frequency band in which the sounding reference signal (SRS) is transmitted, and
whether the frequency band is all or some of a system band.
6. The method according to claim 1 , wherein the SC-FDMA symbol is the last SC-FDMA symbol of a subframe.
7. The method according to claim 1 , further comprising:
receiving information indicating a position of the sounding reference signal (SRS) in the SC-FDMA symbol.
8. A method for receiving an uplink reference signal at a network node in a wireless communication system comprising a relay node, the method comprising:
transmitting sounding reference signal (SRS) parameters to a user equipment (UE); and
receiving a sounding reference signal (SRS) from the user equipment (UE) using radio resources indicated by the sounding reference signal (SRS) parameters,
wherein, when a specific transmission timing offset is configured for the UE, the sounding reference signal (SRS) is received using only a portion of a single carrier-frequency division multiple access (SC-FDMA) symbol, and
wherein, when the specific transmission timing offset is not configured for the UE, the sounding reference signal (SRS) is received using the SC-FDMA symbol.
9. The method according to claim 8 , wherein the sounding reference signal (SRS) is received using one of half portions of the SC-FDMA symbol.
10. The method according to claim 9 , wherein the sounding reference signal (SRS) is received using a front half portion of the SC-FDMA symbol, and the front half portion is comprised of a short block (SB) having subcarrier spacing that is two times larger than that of a symbol including no SRS.
11. The method according to claim 9 , wherein the sounding reference signal (SRS) is received using a rear half portion of the SC-FDMA symbol, and the rear half portion is comprised of a short block (SB) having subcarrier spacing that is two times larger than that of a symbol including no SRS.
12. The method according to claim 8 , wherein the SRS parameters include a parameter indicating
a frequency band in which the sounding reference signal (SRS) is transmitted, and
whether the frequency band is all or some of a system band.
13. The method according to claim 8 , wherein the SC-FDMA symbol is the last SC-FDMA symbol of a subframe.
14. The method according to claim 8 , further comprising receiving information indicating a position of the sounding reference signal (SRS) in the SC-FDMA symbol.
15. A user equipment (UE) comprising:
a radio frequency (RF) unit for transmitting/receiving a radio frequency (RF) signal; and
a processor connected to the RF unit and configured to
receive sounding reference signal (SRS) parameters,
allocate radio resources using the sounding reference signal (SRS) parameters, and
transmit a sounding reference signal (SRS) using the radio resources,
wherein, when a specific transmission timing offset is configured for the UE, the sounding reference signal (SRS) is transmitted using only a portion of a single carrier-frequency division multiple access (SC-FDMA) symbol, and
wherein, when the specific transmission timing offset is not configured for the UE, the sounding reference signal (SRS) is transmitted using the SC-FDMA symbol.