Method and apparatus for transmitting sounding reference signal in wireless access system supporting machine type communication

Patent metadata

Field	Value
Publication number	US-2016338050-A1
Application number	US-201515111408-A
Country	US
Kind code	A1
Filing date	Feb 13, 2015
Priority date	Feb 13, 2014
Publication date	Nov 17, 2016
Grant date	—

Abstract

The present invention provides methods for transmitting an SRS in a wireless access system supporting machine type communication and apparatuses for supporting the same. A method for transmitting a sounding reference signal (SRS) by a terminal in a wireless access system supporting machine type communication (MTC) according to an embodiment of the present invention may comprise the steps of: receiving an SRS transmission parameter configured for repeated transmission of an SRS from a base station; and repeatedly transmitting an SRS during a predetermined SRS repeated transmission interval according to the SRS transmission parameter.

First claim

What is claimed is:

1 . A method of transmitting an sounding reference signal (SRS) by a user equipment (UE) in a wireless access system supporting machine type communication (MTC), the method comprising:
receiving an SRS transmission parameter configured for repeated SRS transmission from an evolved Node B (eNB); and performing the repeated SRS transmission during a predetermined SRS repeat transmission interval according to the SRS transmission parameter, wherein if the SRS repeat transmission interval overlaps with a subframe where an uplink control information is transmitted, the repeated SRS transmission is not performed in the overlapping subframes.

2 . The method of claim 1 , wherein the repeated transmission of the SRS is periodically performed according to a prescribed SRS transmission period.

3 . The method of claim 1 , wherein the repeated transmission of the SRS is aperiodically performed only if there is a request from the eNB.

4 . The method of claim 1 , wherein the repeated transmission of the SRS is performed in only cell-specific SRS subframes.

5 . The method of claim 4 , further comprising:
receiving indications of subframes in which the repeated SRS transmission will be performed among the cell-specific SRS subframes from the eNB, wherein the repeated transmission of the SRS is performed in only the indicated subframes.

6 . The method of claim 1 , wherein the SRS transmission parameter comprises a parameter for generating an SRS sequence for the repeated SRS transmission and wherein the SRS parameter is configured such that the SRS sequence has an identical sequence during the prescribed SRS repeat transmission interval.

7 . A user equipment (UE) for transmitting an sounding reference signal (SRS) in a wireless access system supporting machine type communication (MTC), comprising:
a receiver; a transmitter; and a processor for supporting the SRS transmission, wherein the processor is configured to control the receiver to receive an SRS transmission parameter configured for repeated SRS transmission from an evolved Node B (eNB) and control the transmitter to perform the repeated SRS transmission during a predetermined SRS repeat transmission interval according to the SRS transmission parameter and wherein if the SRS repeat transmission interval overlaps with a subframe where an uplink control information is transmitted, the repeated SRS transmission is not performed in the overlapping subframes.

8 . The UE of claim 7 , wherein the repeated transmission of the SRS is periodically performed according to a prescribed SRS transmission period.

9 . The UE of claim 7 , wherein the repeated transmission of the SRS is aperiodically performed only if there is a request from the eNB.

10 . The UE of claim 7 , wherein the repeated transmission of the SRS is performed in only cell-specific SRS subframes.

11 . The UE of claim 10 , wherein the processor is further configured to control the receiver to receive indications of subframes in which the repeated SRS transmission will be performed among the cell-specific SRS subframes from the eNB and wherein the repeated transmission of the SRS is performed in only the indicated subframes.

12 . The UE of claim 7 , wherein the SRS transmission parameter comprises a parameter for generating an SRS sequence for the repeated SRS transmission and wherein the SRS parameter is configured such that the SRS sequence has an identical sequence during the prescribed SRS repeat transmission interval.

Assignees

• Lg Electronics Inc

Inventors

• Kim Bonghoe
• Yang Suckchel

Classifications

• H04W72/0446 Primary

  Resources in time domain, e.g. slots or frames · CPC title

• H04W4/70

  Services for machine-to-machine communication [M2M] or machine type communication [MTC] · CPC title

• H04L5/0048

  Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091) · CPC title

• H04L5/001

  the frequencies being arranged in component carriers · CPC title

• H04L5/0051 Primary

  of dedicated pilots, i.e. pilots destined for a single user or terminal · CPC title