US-12627439-B2 - Update aperiodic SRS trigger list using MAC-CE

Abstract

A configuration to allow for an SRS resource set trigger list configuration to be updated using MAC-CE. The apparatus transmits, to a UE, an SRS resource set trigger list configuration via RRC signaling. The apparatus transmits, to the UE, an updated trigger list value via MAC-CE to update the SRS resource set trigger list configuration. A trigger state of at least one SRS resource set is updated based on the updated trigger list value. The apparatus receives, from the UE, at least one SRS based on the updated SRS resource set trigger list configuration.

Inventors

• Runxin WANG
• Muhammad Sayed Khairy Abdelghaffar
• Alexandros Manolakos
• Pinar Sen

Assignees

• QUALCOMM INCORPORATED

Dates

Publication Date

20260512

Application Date

20210602

Priority Date

20200824

Claims (20)

1. 1 . An apparatus for wireless communication at a user equipment (UE), comprising: memory; and at least one processor coupled to the memory and configured to: receive, from a base station via radio resource control (RRC) signaling, a sounding reference signal (SRS) resource set trigger list configuration indicating a plurality of SRS resource set identifiers, wherein each SRS resource set identifier of the plurality of SRS resource set identifiers is associated with a downlink control information (DCI) field value and with at least one SRS resource set; receive, from the base station via a medium access control (MAC) control element (CE) (MAC-CE), an updated trigger list value to update the SRS resource set trigger list configuration, wherein the updated trigger list value indicates an update for an association between at least one SRS resource set identifier of the plurality of SRS resource set identifiers and the at least one SRS resource set, and wherein a trigger state of the at least one SRS resource set is updated based on the updated trigger list value; and transmit, to the base station, at least one SRS based on an updated SRS resource set trigger list configuration.
2. 2 . The apparatus of claim 1 , further comprising a transceiver coupled to the at least one processor.
3. 3 . The apparatus of claim 1 , wherein the MAC-CE includes an SRS resource set identifier, wherein the updated trigger list value corresponds to an SRS resource set based on the SRS resource set identifier.
4. 4 . The apparatus of claim 3 , wherein the SRS resource set identifier is utilized with a bit map to correspond with the updated trigger list value.
5. 5 . The apparatus of claim 1 , wherein a plurality of SRS resource sets is updated based on the updated trigger list value.
6. 6 . The apparatus of claim 5 , wherein a respective trigger state of each of the plurality of SRS resource sets is updated based on the MAC-CE.
7. 7 . The apparatus of claim 1 , wherein one or more SRS resource sets are added to the trigger state based on the updated trigger list value.
8. 8 . The apparatus of claim 1 , wherein one or more SRS resource set are removed from the trigger state based on the updated trigger list value.
9. 9 . The apparatus of claim 1 , wherein the MAC-CE is further configured to update SRS resource set parameters, wherein the updated SRS resource set parameters includes at least one of a slot offset for each SRS resource set or a start position for each SRS resource, wherein the MAC-CE includes an SRS resource set identifier and the updated SRS resource set parameters.
10. 10 . The apparatus of claim 1 , wherein the at least one processor is further configured to: receive, from the base station, downlink control information (DCI) to trigger the at least one SRS resource set; and transmit at least one SRS based on the SRS resource set trigger list configuration prior to the updated SRS resource set trigger list configuration being enabled.
11. 11 . The apparatus of claim 1 , wherein the at least one processor is further configured to: receive, from the base station, downlink control information (DCI) to trigger the at least one SRS resource set, wherein the DCI further includes instructions for the UE to change an active bandwidth part (BWP).
12. 12 . A method of wireless communication at a user equipment (UE), comprising: receiving, from a base station via radio resource control (RRC) signaling, a sounding reference signal (SRS) resource set trigger list configuration indicating a plurality of SRS resource set identifiers, wherein each SRS resource set identifier of the plurality of SRS resource set identifiers is associated with a downlink control information (DCI) field value and with at least one SRS resource set; receiving, from the base station via a medium access control (MAC) control element (CE) (MAC-CE), an updated trigger list value to update the SRS resource set trigger list configuration, wherein the updated trigger list value indicates an update for an association between at least one SRS resource set identifier of the plurality of SRS resource set identifiers and the at least one SRS resource set, and wherein a trigger state of the at least one SRS resource set is updated based on the updated trigger list value; and transmitting, to the base station, at least one SRS based on an updated SRS resource set trigger list configuration.
13. 13 . The method of claim 12 , wherein the MAC-CE includes an SRS resource set identifier, wherein the updated trigger list value corresponds to an SRS resource set based on the SRS resource set identifier.
14. 14 . The method of claim 12 , further comprising: receiving, from the base station, downlink control information (DCI) to trigger the at least one SRS resource set; and transmitting at least one SRS based on the SRS resource set trigger list configuration prior to the updated SRS resource set trigger list configuration being enabled.
15. 15 . The method of claim 12 , further comprising: receiving, from the base station, downlink control information (DCI) to trigger the at least one SRS resource set, wherein the DCI further includes instructions for the UE to change an active bandwidth part (BWP).
16. 16 . An apparatus for wireless communication at a base station, comprising: memory; and at least one processor coupled to the memory and configured to: transmit, to a user equipment (UE) via radio resource control (RRC) signaling, a sounding reference signal (SRS) resource set trigger list configuration indicating a plurality of SRS resource set identifiers, wherein each SRS resource set identifier of the plurality of SRS resource set identifiers is associated with a downlink control information (DCI) field value and with at least one SRS resource set; transmit, to the UE via a medium access control (MAC) control element (CE) (MAC-CE), an updated trigger list value to update the SRS resource set trigger list configuration, wherein the updated trigger list value indicates an update for an association between at least one SRS resource set identifier of the plurality of SRS resource set identifiers and the at least one SRS resource set, and wherein a trigger state of the at least one SRS resource set is based on the updated trigger list value; and receive, from the UE, at least one SRS based on an updated SRS resource set trigger list configuration.
17. 17 . The apparatus of claim 16 , further comprising a transceiver coupled to the at least one processor.
18. 18 . The apparatus of claim 16 , wherein the MAC-CE includes an SRS resource set identifier, wherein the updated trigger list value corresponds to an SRS resource set based on the SRS resource set identifier.
19. 19 . The apparatus of claim 18 , wherein the SRS resource set identifier is utilized with a bit map to correspond with the updated trigger list value.
20. 20 . The apparatus of claim 16 , wherein a plurality of SRS resource sets is based on the updated trigger list value.

Description

CROSS REFERENCE TO RELATED APPLICATION(S) This application is National Stage Application filed under 35 U.S.C. § 371 of PCT International Application No. PCT/US2021/035526, entitled “UPDATE APERIODIC SRS TRIGGER LIST USING MAC-CE” and filed Jun. 2, 2021, which claims the benefit of and priority to Greek Patent Application Serial No. 20200100505, entitled “Update Aperiodic SRS Trigger List Using MAC-CE” and filed on Aug. 24, 2020, which are expressly incorporated by reference herein in their entirety. TECHNICAL FIELD The present disclosure relates generally to communication systems, and more particularly, to a configuration to update sounding reference signal (SRS) trigger list configurations using medium access control (MAC) control element (CE) (MAC-CE). INTRODUCTION Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts. Typical wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources. Examples of such multiple-access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single-carrier frequency division multiple access (SC-FDMA) systems, and time division synchronous code division multiple access (TD-SCDMA) systems. These multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different wireless devices to communicate on a municipal, national, regional, and even global level. An example telecommunication standard is 5G New Radio (NR). 5G NR is part of a continuous mobile broadband evolution promulgated by Third Generation Partnership Project (3GPP) to meet new requirements associated with latency, reliability, security, scalability (e.g., with Internet of Things (IoT)), and other requirements. 5G NR includes services associated with enhanced mobile broadband (eMBB), massive machine type communications (mMTC), and ultra-reliable low latency communications (URLLC). Some aspects of 5G NR may be based on the 4G Long Term Evolution (LTE) standard. There exists a need for further improvements in 5G NR technology. These improvements may also be applicable to other multi-access technologies and the telecommunication standards that employ these technologies. BRIEF SUMMARY The following presents a simplified summary of one or more aspects in order to provide a basic understanding of such aspects. This summary is not an extensive overview of all contemplated aspects, and is intended to neither identify key or critical elements of all aspects nor delineate the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that is presented later. In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a device at a base station. The device may be a processor and/or a modem at a base station or the base station itself. The apparatus transmits, to a user equipment (UE), a sounding reference signal (SRS) resource set trigger list configuration via radio resource control (RRC) signaling. The apparatus transmits, to the UE, an updated trigger list value via MAC-CE to update the SRS resource set trigger list configuration. A trigger state of at least one SRS resource set is updated based on the updated trigger list value. The apparatus receives, from the UE, at least one SRS based on the updated SRS resource set trigger list configuration. In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a device at a UE. The device may be a processor and/or a modem at a UE or the UE itself. The apparatus receives, from a base station, an SRS resource set trigger list configuration via RRC signaling. The apparatus receives, from the base station, an updated trigger list value via MAC-CE to update the SRS resource set trigger list configuration. A trigger state of at least one SRS resource set is updated based on the updated trigger list value. The apparatus transmits, to the base station, at least one SRS based on the updated SRS resource set trigger list configuration. To the accomplishment of the foregoing and related ends, the one or more aspects comprise the features hereinafter fully described and particularly pointed out in the claims. The following description and the annexed drawings set forth in detail certain illustrative features of the one or more aspects. These features are indicative, however, of but a few of the various ways in which the principles of various aspects may be employed, and this description is intended to include all such aspects