Sounding reference signal (SRS) transmission protocol

Patent metadata

Field	Value
Publication number	US-11026189-B2
Application number	US-201816011261-A
Country	US
Kind code	B2
Filing date	Jun 18, 2018
Priority date	Jun 19, 2017
Publication date	Jun 1, 2021
Grant date	Jun 1, 2021

Abstract

Certain aspects of the present disclosure relate to methods and apparatus for wireless communication. In certain aspects, the method generally includes determine a transmission power for each of at least one first sounding reference signal (SRS) to be transmitted using at least one first antenna, wherein the determination is based on whether the at least one first SRS is transmitted using an amplifier of a transmit chain configured for transmissions using a second antenna, and transmitting the at least one first SRS based on the determination.

First claim

What is claimed is:

1. A method for wireless communication, comprising:
determining a transmission power for each of at least one first sounding reference signal (SRS) to be transmitted using at least one first antenna, wherein the determination is based on whether a routing configuration of a user-equipment (UE) is used to transmit the at least one first SRS using an amplifier of a transmit chain selectively configured to transmit using a second antenna or the at least one first antenna, the routing configuration of the UE being used to transmit the at least one first SRS and a second SRS using different symbols of a slot, wherein the determination comprises determining that the UE is to maintain a transmission power offset associated with a power loss associated with the routing configuration throughout a power range of the amplifier when transmitting the at least one first SRS; and
transmitting the at least one first SRS based on the determination.

2. The method of claim 1 , wherein the at least one first antenna is designated for downlink communications, and the second antenna is designated for uplink communications.

3. The method of claim 1 , wherein the determination comprises determining whether to:
compensate for the power loss until a transmit power limit is reached when transmitting the at least one first SRS; or maintain the transmission power offset associated with the power loss throughout the power range of the amplifier when transmitting the at least one first SRS.

4. The method of claim 3 , further comprising transmitting the second SRS via the second antenna, wherein:
the compensating comprises compensating for the power loss such that the transmission power of the at least one first SRS is the same as a transmission power of the second SRS until the transmit power limit is reached.

5. The method of claim 3 , further comprising transmitting the second SRS via the second antenna, wherein:
the maintaining comprises maintaining the transmission power offset such that the transmission power of the at least one first SRS is less than a transmission power of the second SRS by the transmission power offset.

6. The method of claim 1 , further comprising:
receiving, from a network entity, an indication that the UE is to maintain the transmission power offset throughout the power range of the amplifier.

7. The method of claim 1 , wherein the power loss is associated with one or more components used to couple an output of the amplifier with the at least one first antenna.

8. A method for wireless communication, comprising:
determining whether a user-equipment (UE) is to compensate for a power loss associated with a routing configuration used to transmit at least one first sounding reference signal (SRS) via at least one first antenna using an amplifier of a transmit chain selectively configured to transmit using a second antenna or the at least one first antenna, wherein the routing configuration of the UE is used to transmit the at least one first SRS and a second SRS using different symbols of a slot, wherein the determination comprises determining that the UE is to maintain a transmission power offset associated with the power loss throughout a power range of the amplifier when transmitting the at least one first SRS;
transmitting, to the UE, a first indication that the UE is to maintain the transmission power offset throughout the power range of the amplifier, based on the determination; and
receiving, from the UE, the at least one first SRS after transmitting the first indication.

9. The method of claim 8 , further comprising:
receiving, from the UE, a second indication of whether the UE is capable of compensating for the power loss, wherein the determination is based on the second indication.

10. The method of claim 8 , wherein the at least one first antenna is designated for downlink communications, and the second antenna is designated for uplink communications.

11. The method of claim 8 , wherein the power loss is associated with one or more components used to couple an output of the amplifier with the at least one first antenna.

12. An apparatus for wireless communication, comprising:
a processing system configured to determine a transmission power for each of at least one first sounding reference signal (SRS) to be transmitted using at least one first antenna, wherein the determination is based on whether a routing configuration of a user-equipment (UE) is used to transmit the at least one first SRS using an amplifier of a transmit chain selectively configured to transmit using a second antenna or the at least one first antenna, the routing configuration of the UE being used to transmit the at least one first SRS and a second SRS using different symbols of a slot, wherein the determination comprises determining that the UE is to maintain a transmission power offset associated with a power loss associated with the routing configuration throughout a power range of the amplifier when transmitting the at least one first SRS; and
a transmitter configured to transmit the at least one first SRS based on the determination.

13. An apparatus for wireless communication, comprising:
a processing system configured to determine whether a user-equipment (UE) is to compensate for a power loss associated with a routing configuration used to transmit at least one first sounding reference signal (SRS) via at least one first antenna using an amplifier of a transmit chain selectively configured to transmit using a second antenna or the at least one first antenna, wherein the routing configuration of the UE is used to transmit the at least one first SRS and a second SRS using different symbols of a slot, wherein the determination comprises determining that the UE is to maintain a transmission power offset associated with the power loss throughout a power range of the amplifier when transmitting the at least one first SRS;
a transmitter configured to transmit, to the UE, a first indication that the UE is to maintain the transmission power offset throughout the power range of the amplifier, based on the determination; and
a receiver configured to receive, from the UE, the at least one first SRS after transmitting the first indication.

14. An apparatus for wireless communication, comprising:
means for determining a transmission power for each of at least one first sounding reference signal (SRS) to be transmitted using at least one first antenna, wherein the determination is based on whether a routing configuration of a user-equipment (UE) is used to transmit the at least one first SRS using an amplifier of a transmit chain selectively configured to transmit using a second antenna or the at least one first antenna, the routing configuration of the UE being used to transmit the at least one first SRS and a second SRS using different symbols of a slot, wherein the means for determining comprises means for determining that the UE is to maintain a transmission power offset associated with a power loss associated with the routing configuration throughout a power range of the amplifier when transmitting the at least one first SRS; and
means for transmitting the at least one first SRS based on the determination.

15. An apparatus for wireless communication, comprising:
means for determining whether a user-equipment (UE) is to compensate for a power loss associated with a routing configuration used to transmit at least one first sounding reference signal (SRS) via at least one first antenna using an amplifier of a transmit chain selectively configured to transmit using a second antenna or the at least one first antenna, wher

Assignees

• Qualcomm Inc

Inventors

• Vintola Timo Ville
• Gaal Peter
• Rico Alvarino Alberto
• Huang Yi
• Mahajan Vishal
• See Andrew Puayhoe
• Manolakos Alexandros

Classifications

• H04W52/146

  Uplink power control · CPC title

• H04W52/325 Primary

  Power control of control or pilot channels · CPC title

• H04W52/44

  in connection with interruption of transmission · CPC title

• H04B7/0608

  Antenna selection according to transmission parameters · CPC title

• H04L5/001

  the frequencies being arranged in component carriers · CPC title