Method and device for controlling transmission of sounding reference signal in wireless access system supporting machine type communication
The present invention provides methods for controlling transmission of a sounding reference signal (SRS) in a wireless access system supporting machine type communication (MTC) and devices for supporting same. A method for controlling transmission of an SRS by an MTC terminal in a wireless access system supporting MTC, according to an embodiment of the present invention, can comprise the steps of: receiving an upper layer signal comprising information about an SRS which is to be repeatedly transmitted; configuring the SRS on the basis of the information about the SRS; and transmitting the SRS by means of a subband to which a physical uplink shared channel (PUSCH) is allocated and which is being frequency hopped. The subband comprises six physical resource blocks (PRB), and the SRS can be sequentially transmitted to the subband being frequency hopped.
1. A method for controlling a Sounding Reference Signal (SRS) transmission in a wireless access system supporting a Machine Type Communication (MTC), the method is performed by an MTC User Equipment (MTC UE) and comprising:
receiving a higher-layer signal including information about an SRS to be transmitted;
configuring the SRS based on the information about the SRS;
transmitting a Physical Uplink Shared Channel (PUSCH) repeatedly in a subframe of index n and a subframe of index n+1 on a configured PUSCH subband; and
transmitting the SRS on a configured SRS subband in the subframe of index n based on the configured SRS subband being identical to the configured PUSCH subband in a frequency domain.
2. The method according to claim 1 , wherein the higher-layer signal further includes subband information indicating the SRS subband in which the SRS is to be transmitted.
3. The method according to claim 1 , wherein the SRS is transmitted sequentially in units of one physical resource block (PRB).
4. The method according to claim 1 , wherein the SRS is repeatedly transmitted a predetermined number of times.
5. The method according to claim 1 , wherein the SRS in the subframe of index n is not transmitted based on the configured SRS subband being different from the configured PUSCH subband in the frequency domain.
6. A Machine Type Communication (MTC) User Equipment (UE) for controlling a Sounding Reference Signal (SRS) transmission in a wireless access system supporting an MTC, the MTC UE comprising:
a transmitter;
a receiver; and
a processor, operatively coupled to the transmitter and the receiver,
wherein the processor:
controls the receiver to receive a higher-layer signal including information about an SRS to be transmitted,
configures the SRS based on the information about the SRS,
controls the transmitter to transmit a Physical Uplink Shared Channel (PUSCH) repeatedly in a subframe of index n and a subframe of index n+1 on a configured PUSCH band, and
controls the transmitter to transmit the SRS on a configured SRS subband in the subframe of index n based on the configured SRS subband being identical to the configured PUSCH subband in a frequency domain.
7. The MTC UE according to claim 6 , wherein the higher-layer signal further includes subband information indicating the SRS subband in which the SRS is to be transmitted.
8. The MTC UE according to claim 6 , wherein the SRS is transmitted sequentially in units of one physical resource block (PRB).
9. The MTC UE according to claim 6 , wherein the SRS is repeatedly transmitted a predetermined number of times.
10. The MTC UE according to claim 6 , wherein the SRS in the subframe of index n is not transmitted based on the configured SRS subband being different from the configured PUSCH subband in the frequency domain.