Sounding reference signal transmission

Patent metadata

Field	Value
Publication number	US-2021194737-A1
Application number	US-201817055389-A
Country	US
Kind code	A1
Filing date	May 14, 2018
Priority date	May 14, 2018
Publication date	Jun 24, 2021
Grant date	—

Abstract

Embodiments of the present disclosure relate to methods, devices and computer readable mediums for sounding reference signal (SRS) transmission. In example embodiments, a method implemented at a terminal device is provided. According to the method, in response to at least one set of SRS resources being configured for transmitting a SRS to a network device and antenna switching being enabled for the terminal device, the terminal device determines at least one guard period required for transmitting the SRS. Uplink transmission to the network device is expected to be scheduled outside the at least one guard period. In response to the uplink transmission being scheduled outside the at least one guard period, the terminal device transmits the SRS to the network device over the at least one set of SRS resources. In response to the uplink transmission being scheduled within the at least one guard period, the terminal device disables at least a part of the at least one set of SRS resources for transmitting the SRS.

First claim

1 . A method implemented at a terminal device, comprising:
in response to at least one set of sounding reference signal (SRS) resources being configured for transmitting a SRS to a network device and antenna switching being enabled for the terminal device, determining at least one guard period required for transmitting the SRS, wherein uplink transmission to the network device is expected to be scheduled outside the at least one guard period; in response to the uplink transmission being scheduled outside the at least one guard period, transmitting the SRS to the network device over the at least one set of SRS resources; and in response to the uplink transmission being scheduled within the at least one guard period, disabling at least a part of the at least one set of SRS resources for transmitting the SRS.

2 . The method of claim 1 , wherein the determining at least one guard period comprises:
determining the at least one guard period based on a subcarrier spacing of an uplink channel.

3 . The method of claim 1 , wherein the determining at least one guard period comprises:
determining at least one of the following: a first guard period prior to the at least one set of SRS resources; a second guard period subsequent to the at least one set of SRS resources; and a third guard period between two SRS resources of the at least one set of SRS resources.

4 . The method of claim 1 , wherein the determining at least one guard period comprises:
in response to the uplink transmission and a first SRS resource in the at least one set of SRS resources being associated with a same configuration about a transmit antenna of the terminal device, determining that no guard period is required between the uplink transmission and SRS transmission over the first SRS resource.

5 . The method of claim 1 , wherein the disabling at least a part of the at least one set of SRS resources for transmitting the SRS comprises:
determining one or more SRS resources in the at least one set of SRS resources to be disabled; and disabling the one or more SRS resources for transmitting the SRS.

6 . The method of claim 5 , wherein the determining one or more SRS resources comprises:
determining the one or more SRS resources to be disabled based on at least one of the following: a type of the SRS; an antenna pattern of the terminal device; and a subcarrier spacing of an uplink channel.

7 . The method of claim 6 , wherein the type of the SRS indicates whether the SRS is periodic, semi-persistent or aperiodic.

8 . The method of claim 5 , wherein the determining one or more SRS resources comprises:
in response to the uplink transmission and a second SRS resource in the at least one set of SRS resources being associated with a same configuration about a transmit antenna of the terminal device, excluding the second SRS resource from the one or more SRS resources.

9 . The method of claim 1 , wherein the transmitting the SRS comprises:
determining a first subcarrier spacing for the uplink transmission; determining a second subcarrier spacing for transmitting the SRS based on the first subcarrier spacing, the second subcarrier spacing being a multiple of the first subcarrier spacing; and transmitting the SRS to the network device based on the second subcarrier spacing.

10 . The method of claim 1 , wherein the at least one set of SRS resources include at least a first set of SRS resources and a second set of SRS resources, first SRS transmission over the first set of SRS resources triggered by first Downlink Control Information (DCI) transmitted from the network device to the terminal device being prior to second SRS transmission over the second set of SRS resources triggered by second DCI transmitted from the network device to the terminal device, and wherein the disabling at least a part of the at least one set of SRS resources for transmitting the SRS comprises:
in response to failing to receiving the second DCI from the network device prior to the first SRS transmission, disabling the at least one set of SRS resources for transmitting the SRS; or in response to failing to receiving the second DCI from the network device within a predetermined period of time since the first DCI is received, disabling the at least one set of SRS resources for transmitting the SRS.

11 . A method implemented at a network device, comprising:
in response to at least one set of sounding reference signal (SRS) resources being configured for receiving a SRS from a terminal device and antenna switching being enabled for the terminal device, determining at least one guard period required for receiving the SRS, wherein uplink reception from the terminal device is expected to be scheduled outside the at least one guard period; in response to the uplink reception being scheduled outside the at least one guard period, receiving the SRS from the terminal device over the at least one set of SRS resources; and in response to the uplink reception being scheduled within the at least one guard period, disabling at least a part of the at least one set of SRS resources for receiving the SRS.

12 . The method of claim 11 , wherein the determining at least one guard period comprises:
determining the at least one guard period based on a subcarrier spacing of an uplink channel.

13 . The method of claim 11 , wherein the determining at least one guard period comprises:
determining at least one of the following: a first guard period prior to the at least one set of SRS resources; a second guard period subsequent to the at least one set of SRS resources; and a third guard period between two SRS resources of the at least one set of SRS resources.

14 . The method of claim 1 , wherein the determining at least one guard period comprises:
in response to the uplink reception and a first SRS resource in the at least one set of SRS resources being associated with a same configuration about a transmit antenna of the terminal device, determining that no guard period is required between the uplink reception and SRS reception over the first SRS resource.

15 . The method of claim 11 , wherein the disabling at least a part of the at least one set of SRS resources for receiving the SRS comprises:
determining one or more SRS resources in the at least one set of SRS resources to be disabled; and disabling the one or more SRS resources for receiving the SRS.

16 . The method of claim 15 , wherein the determining one or more SRS resources comprises:
determining the one or more SRS resources to be disabled based on at least one of the following: a type of the SRS; an antenna pattern of the terminal device; and a subcarrier spacing of an uplink channel.

17 . The method of claim 16 , wherein the type of the SRS indicates whether the SRS is periodic, semi-persistent or aperiodic.

18 . The method of claim 15 , wherein the determining one or more SRS resources comprises:
in response to the uplink reception and a second SRS resource in the at least one set of SRS resources being associated with a same configuration about a transmit antenna of the terminal device, excluding the second SRS resource from the one or more SRS resources.

19 . The method of claim 11 , wherein the receiving the SRS comprises:
determining a first subcarrier spacing for the uplink reception; determining a second subcarrier spacing for receiving the SRS based on the first subcarrier spacing, the second subcarrier spacing being a multiple of the first subcarrier spacing; and receiving the SRS from th

Assignees

• Nec Corp

Inventors

• Gao Yukai
• Wang Gang

Classifications

• H04W72/53

  based on regulatory allocation policies · CPC title

• H04W72/23

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title

• H04L5/0048 Primary

  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

• H04L25/0226 Primary

  sounding signals per se · CPC title

• H04L5/005

  of common pilots, i.e. pilots destined for multiple users or terminals · CPC title