US-12621782-B2 - Timing advance validation enhancements for pre-configured uplink resources

US12621782B2US 12621782 B2US12621782 B2US 12621782B2US-12621782-B2

Abstract

Technologies and techniques are disclosed for managing timing advance (TA) validation of configured grant small data transmission (CG-SDT). A scheduling entity may receive downlink signal quality measurements for downlink beams from a scheduled entity, as well as a CG-SDT configuration request. The scheduling entity may transmit a CG-SDT configuration to the UE in response to receiving the CG-SDT configuration request, where the CG-SDT configuration includes a timing advance (TA) validation criteria based on downlink signal quality measurements meeting configured thresholds.

Inventors

Jing Lei
Alexandros Manolakos
Muhammad Nazmul Islam
Linhai He

Assignees

QUALCOMM INCORPORATED

Dates

Publication Date: 20260505
Application Date: 20210809
Priority Date: 20200810

Claims (20)

1 . A scheduling entity within a wireless communication network, comprising: a one or more memories; and a one or more processors coupled to the one or more memories, wherein the one or more processors are configured to: transmit a configured grant small data transmission (CG-SDT) configuration to a user equipment (UE), the CG-SDT configuration comprising timing advance (TA) validation criteria indicating that TA validation prior to a CG-SDT transmission be based on at least one downlink signal quality measurement meeting at least one threshold; transmit, on a periodic schedule together with one of a wake-up signal (WUS) or a paging signal within a discontinuous reception (DRX) time period, one or more downlink reference signals for TA validation; and receive a communication from the UE based on the CG-SDT configuration.
2 . The scheduling entity of claim 1 , wherein the downlink signal quality measurements comprise reference signal received power (RSRP) measurements or a variation in RSRP measurements.
3 . The scheduling entity of claim 1 , wherein the TA validation criteria also indicates one or more of: at least one downlink signal quality measurement configuration, at least one downlink reference signal, a respective beam index of each of the at least one downlink reference signal, positioning information obtained from at least one of a serving cell or one or more neighbor cells, a respective transmit power offset to be applied to the downlink signal quality measurements for each of the at least one downlink reference signal, a UE capability, a UE radio resource control (RRC) state, a UE uplink coverage enhancement for a CG-SDT transmission, a detected change of a serving cell or transmission and reception point (TRP), or a TA timer configuration.
4 . The scheduling entity of claim 3 , wherein the UE RRC state comprises one of an inactive state, an idle state and a connected state.
5 . The scheduling entity of claim 4 , wherein, for one of the inactive state or idle state, the one or more processors are configured to transmit the CG-SDT configuration via one of Radio Resource Control (RRC) signaling or a Medium Access Control (MAC) Control Element (MAC CE).
6 . The scheduling entity of claim 1 , wherein the one or more processors are configured to transmit the one or more downlink reference signals within a measurement gap that at least partially overlaps with a WUS occasion, a paging occasion, or a DRX-ON time period of the UE configured with CG-SDT resources.
7 . The scheduling entity of claim 1 , wherein the periodic schedule for a CG-SDT transmission is jointly configured with a DRX cycle, and the periodicity of the CG-SDT transmission is configured to be proportional to a periodicity of the DRX cycle.
8 . The scheduling entity of claim 1 , wherein the one or more processors are configured to transmit the CG-SDT configuration by transmitting a search space configuration and PDCCH configuration that at least partially overlap with a WUS occasion, a paging occasion, or a DRX-ON time period of the UE configured with CG-SDT resources.
9 . The scheduling entity of claim 3 , wherein the UE uplink coverage enhancement comprises a number of PUSCH repetition levels, a number of aggregated PUSCH slots, or a PUSCH repetition pattern comprising at least frequency hopping, redundancy version cycling and DMRS configuration.
10 . The scheduling entity of claim 1 , wherein the one or more processors are configured to transmit the CG-SDT configuration to the UE by transmitting CG-SDT configuration parameters for the UE, downlink reference signals or channels used by the UE for TA validation and the TA validation criteria for the UE, and wherein a time gap between the downlink reference signals or channels used by the UE for TA validation and the CG-SDT transmission from the UE is no less than a configured time threshold.
11 . The scheduling entity of claim 1 , wherein the one or more processors are configured to transmit the CG-SDT configuration by transmitting a common or separate CG-SDT configuration to a plurality of user equipment (UEs), and wherein the processor and the memory are configured to transmit the CG-SDT configuration by transmitting the common or a separate CG-SDT configuration on a shared or partially overlapped radio resource in a time or frequency domain, using one or multiple beams which have quasi-colocation (QCL) relationship with other DL broadcast beams.
12 . A method of wireless communication of a scheduling entity in a wireless communication network, the method comprising: transmitting a configured grant small data transmission (CG-SDT) configuration to a user equipment (UE), the CG-SDT configuration comprising timing advance (TA) validation criteria based on at least one downlink signal quality measurement meeting at least one threshold; transmit, on a periodic schedule together with one of a wake-up signal (WUS) or a paging signal within a discontinuous reception (DRX) time period, one or more downlink reference signals for TA validation of a CG-SDT transmission receiving a communication from the UE based on the CG-SDT configuration.
13 . The method of claim 12 , wherein the downlink signal quality measurements comprise reference signal received power (RSRP) measurements or a variation in RSRP measurements.
14 . The scheduling entity of claim 12 , wherein the TA validation criteria also indicates one or more of: at least one downlink signal quality measurement configuration, at least one downlink reference signal, a respective beam index of each of the at least one downlink reference signal, positioning information obtained from at least one of a serving cell or one or more neighbor cells, a respective transmit power offset to be applied to the downlink signal quality measurements for each of the at least one downlink reference signal, a UE capability, a UE radio resource control (RRC) state, a UE uplink coverage enhancement for a CG-SDT transmission, a detected change of a serving cell or transmission and reception point (TRP), or a TA timer configuration.
15 . The method of claim 14 , wherein the UE RRC state comprises one of an inactive state, an idle state and a connected state.
16 . The method of claim 15 , wherein, for one of the inactive state or idle state, the transmitting of the CG-SDT configuration comprises transmitting the CG-SDT configuration via one of Radio Resource Control (RRC) signaling or MAC Control Element (MAC CE).
17 . The method of claim 12 , wherein transmitting the CG-SDT configuration further comprises transmitting the downlink reference signals within a measurement gap configuration that at least partially overlaps with a WUS occasion, a paging occasion, or a DRX-ON time period of the UE configured with CG-SDT resources.
18 . The method of claim 12 , wherein the periodic schedule is jointly configured with a DRX cycle, and a periodicity of CG-SDT configuration transmission is configured to be proportional to a periodicity of the DRX cycle.
19 . The method of claim 12 , wherein transmitting the CG-SDT configuration further comprises transmitting a search space configuration and PDCCH configuration that at least partially overlaps with a WUS occasion, paging occasion, or a DRX-ON time period of the UE configured with CG-SDT resources.
20 . The method of claim 14 , wherein a range for the UE uplink coverage enhancement comprises a number of PUSCH repetition levels, or a number of aggregated PUSCH slots, or a PUSCH repetition pattern including at least frequency hopping, redundancy version cycling and DMRS configuration.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application is the U.S. national stage of PCT patent application number PCT/US2021/045222 filed on Aug. 9, 2021, which claims priority to Greek patent application Ser. No. 20/200,100468 to Lei, et al., filed Aug. 10, 2020, the contents of which is incorporated by reference in its entirety herein. TECHNICAL FIELD The technology discussed below relates generally to wireless communication networks, and more particularly, to techniques for enhancing timing advance (TA) validation for pre-configured uplink resources (PUR) and configured grant small data transmission (CG-SDT) procedures. INTRODUCTION Technologies relating to the Internet of Things (IoT) have become more widely used in recent years. The 3rd Generation Partnership Project (3GPP) has specified three cellular solutions for operation in licensed spectrum such as Long Term Evolution (LTE) for machine-type communications (LTE-M), narrowband IoT (NB-IoT), and extended-coverage GSM for IoT (EC-GSM-IoT). Unlike short-range technologies and low-power wide-area (LPWA) technologies operating in unlicensed spectrum, these 3GPP solutions operate in licensed spectrum and can provide a guaranteed quality of service (QoS). Applications include, for example, sensors, surveillance cameras, wearable devices, smart meters and smart meter sensors. BRIEF SUMMARY OF SOME EXAMPLES The following presents a summary of one or more aspects of the present disclosure, in order to provide a basic understanding of such aspects. This summary is not an extensive overview of all contemplated features of the disclosure, and is intended neither to identify key or critical elements of all aspects of the disclosure nor to delineate the scope of any or all aspects of the disclosure. Its sole purpose is to present some concepts of one or more aspects of the disclosure in a form as a prelude to the more detailed description that is presented later. In one example, a scheduling entity is disclosed within a wireless communication network, including a transceiver; a memory; and a processor communicatively coupled to the transceiver and the memory, wherein the processor and the memory are configured to: receive a configured grant small data transmission (CG-SDT) configuration request from a user equipment (UE); and transmit a CG-SDT configuration to the UE in response to receiving the CG-SDT configuration request, the CG-SDT configuration comprising a timing advance (TA) validation criteria based on downlink signal quality measurements meeting configured thresholds. In one example, a method is disclosed of wireless communication of a scheduling entity in a wireless communication network, the method including receiving a configured grant small data transmission (CG-SDT) configuration request from a user equipment (UE); and transmitting a CG-SDT configuration comprising the TA validation criteria to the UE in response to receiving the CG-SDT configuration request, the CG-SDT configuration comprising a timing advance (TA) validation criteria based on downlink signal quality measurements meeting configured thresholds. In one example, a user equipment (UE) is disclosed within a wireless communication network, including a transceiver; a memory; and a processor communicatively coupled to the transceiver and the memory, wherein the processor and the memory are configured to: transmit signal quality measurements of configured downlink beams; transmit a configured grant small data transmission (CG-SDT) request; receive a CG-SDT configuration comprising a timing advance (TA) validation criterion based on the signal quality measurements meeting configured thresholds; validate the TA for CG-SDT transmission in accordance with one or more of the TA validation criteria; and execute the CG-SDT configuration for communication with the wireless network. In one example, a method is disclosed of wireless communication of a user equipment (UE) in a wireless communication network, the method including transmitting signal quality measurements of configured downlink beams; transmitting a configured grant small data transmission (CG-SDT) request; receiving a CG-SDT configuration comprising a timing advance (TA) validation criterion based on the signal quality measurements meeting configured thresholds; validating the TA for CG-SDT configuration transmission in accordance with one or more of the TA validation criteria; and executing the CG-SDT configuration for communication with the wireless network. These and other aspects of the invention will become more fully understood upon a review of the detailed description, which follows. Other aspects, features, and embodiments of the present invention will become apparent to those of ordinary skill in the art, upon reviewing the following description of specific, exemplary embodiments of the present invention in conjunction with the accompanying figures. While features of the present invention may be discussed relative to certain