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US-12628102-B2 - Synchronization accuracy for reduced capacity user equipment in a non-terrestrial network

US12628102B2US 12628102 B2US12628102 B2US 12628102B2US-12628102-B2

Abstract

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may determine an uplink and/or downlink synchronization accuracy level that satisfies a reduced capacity synchronization accuracy threshold, wherein the UE comprises a reduced capacity UE and wherein the reduced capacity synchronization accuracy threshold is lower than a synchronization accuracy threshold of an enhanced mobile broadband device. The UE may communicate with a non-terrestrial wireless communication device based at least in part on the synchronization accuracy level. Numerous other aspects are described.

Inventors

  • Qiaoyu Li
  • Chao Wei
  • Hao Xu
  • Jing Dai

Assignees

  • QUALCOMM INCORPORATED

Dates

Publication Date
20260512
Application Date
20210331

Claims (20)

  1. 1 . A user equipment (UE) for wireless communication, comprising: a memory; and one or more processors, coupled to the memory, configured to: determine a synchronization accuracy level that satisfies a reduced capacity synchronization accuracy threshold, the synchronization accuracy level corresponding to at least one of uplink communications or downlink communications, wherein the UE comprises a reduced capacity UE and wherein the reduced capacity synchronization accuracy threshold is lower than a synchronization accuracy threshold of an enhanced mobile broadband device; communicate with a non-terrestrial wireless communication device based at least in part on the synchronization accuracy level; and wherein the one or more processors, to determine the synchronization accuracy level, are configured to determine the synchronization accuracy level based at least in part on at least one of: referencing a wireless communication standard, or receiving, from a serving non-terrestrial wireless device, an indication that indicates the synchronization accuracy level, wherein determining the synchronization accuracy level comprises determining the synchronization accuracy level based at least in part on the indication.
  2. 2 . The UE of claim 1 , wherein the one or more processors, to determine the synchronization accuracy level, are configured to determine the synchronization accuracy level based at least in part on at least one of a global navigation satellite system positioning accuracy or a serving satellite ephemeris.
  3. 3 . The UE of claim 1 , wherein the one or more processors, to communicate with the non-terrestrial wireless communication device based at least in part on the synchronization accuracy level, are configured to: disable a global navigation satellite system (GNSS) positioning process; disable a satellite ephemeris determination process; lower a GNSS positioning procedure accuracy level; or lower a satellite ephemeris determination procedure accuracy level.
  4. 4 . The UE of claim 1 , wherein the one or more processors, to receive the indication, are configured to receive at least one of: a system information broadcast message, a downlink radio resource control (RRC) message, a downlink medium access control control element (MAC CE), or a downlink control information (DCI) transmission.
  5. 5 . The UE of claim 4 , wherein the one or more processors are further configured to transmit a request for a lowered synchronization accuracy level, wherein the one or more processors, to receive the indication, are configured to receive the indication based at least in part on transmitting the request.
  6. 6 . The UE of claim 5 , wherein the one or more processors, to transmit the request, are configured to transmit at least one of: an uplink RRC message, an uplink MAC CE, or an uplink control information transmission.
  7. 7 . The UE of claim 5 , wherein the request indicates a suggested synchronization accuracy level.
  8. 8 . The UE of claim 1 , wherein the one or more processors are further configured to determine at least one of a reduced capacity numerology or a reduced capacity resource allocation associated with at least one of: a physical uplink shared channel, a physical uplink control channel, a random access channel preamble transmission, a physical downlink shared channel, a physical downlink control channel, a reference signal associated with a physical uplink channel, a reference signal associated with a physical downlink channel, a synchronization signal, a channel state information reference signal, or a positioning reference signal.
  9. 9 . The UE of claim 8 , wherein the reduced capacity numerology comprises at least one of: a subcarrier spacing that is greater than a subcarrier spacing associated with an enhanced mobile broadband (eMBB) device, a cyclic prefix that is longer than a cyclic prefix associated with the eMBB device, or a symbol duration that is longer than a symbol duration associated with the eMBB device.
  10. 10 . The UE of claim 8 , wherein the one or more processors, to determine the reduced capacity resource allocation, are configured to receive an indication of the reduced capacity resource allocation, wherein the indication of the reduced capacity resource allocation indicates a number of available tones for transmission that is less than a number of available tones for transmission associated with an eMBB device.
  11. 11 . The UE of claim 10 , wherein the number of available tones corresponds to a first subset of resource elements (REs) of a set of REs within a scheduled resource, wherein the set of REs comprises the first subset of REs and a second subset of REs, and wherein the second subset of REs are to be unused by the UE.
  12. 12 . The UE of claim 8 , wherein the one or more processors, to determine the at least one of the reduced capacity numerology or the reduced capacity resource allocation, are configured to determine the at least one of the reduced capacity numerology or the reduced capacity resource allocation based at least in part on a dedicated bandwidth part.
  13. 13 . The UE of claim 8 , wherein the one or more processors, to determine the at least one of the reduced capacity numerology or the reduced capacity resource allocation, are configured to determine the at least one of the reduced capacity numerology or the reduced capacity resource allocation based at least in part on: referencing a wireless communication standard, or receiving, from a serving non-terrestrial wireless device, an indication that indicates the synchronization accuracy level, wherein determining the synchronization accuracy level comprises determining the synchronization accuracy level based at least in part on the indication.
  14. 14 . A non-terrestrial wireless communication device for wireless communication, comprising: a memory; and one or more processors, coupled to the memory, configured to: determine a synchronization accuracy level, associated with a reduced capacity user equipment (UE), that satisfies a reduced capacity synchronization accuracy threshold, the synchronization accuracy level corresponding to at least one of uplink communications or downlink communications, wherein the reduced capacity synchronization accuracy threshold is lower than a synchronization accuracy threshold of an enhanced mobile broadband device; communicate with the reduced capacity UE via a non-terrestrial wireless network based at least in part on the synchronization accuracy level; and wherein the one or more processors, to determine the synchronization accuracy level, are configured to determine the synchronization accuracy level based at least in part on at least one of: referencing a wireless communication standard, or transmitting, to the UE, an indication that indicates the synchronization accuracy level, wherein determining the synchronization accuracy level comprises determining the synchronization accuracy level based at least in part on the indication.
  15. 15 . The non-terrestrial wireless communication device of claim 14 , wherein the one or more processors, to determine the synchronization accuracy level, are configured to determine the synchronization accuracy level based at least in part on at least one of a global navigation satellite system positioning accuracy or a serving satellite ephemeris.
  16. 16 . The non-terrestrial wireless communication device of claim 14 , wherein the one or more processors, to communicate with the UE based at least in part on the synchronization accuracy level, are configured to communicate with the UE based at least in part on at least one of: a disabled global navigation satellite system (GNSS) positioning process; a disabled satellite ephemeris determination process; a lowered GNSS positioning procedure accuracy level; or a lowered satellite ephemeris determination procedure accuracy level.
  17. 17 . The non-terrestrial wireless communication device of claim 14 , wherein the one or more processors, to transmit the indication, are configured to transmit at least one of: a system information broadcast message, a downlink radio resource control (RRC) message, a downlink medium access control control element (MAC CE), or a downlink control information (DCI) transmission.
  18. 18 . The non-terrestrial wireless communication device of claim 17 , wherein the one or more processors are further configured to receive a request for a lowered synchronization accuracy level, wherein the one or more processors, to transmit the indication, are configured to transmit the indication based at least in part on receiving the request.
  19. 19 . The non-terrestrial wireless communication device of claim 18 , wherein the one or more processors, to receive the request, are configured to receive at least one of: an uplink RRC message, an uplink MAC CE, or an uplink control information transmission.
  20. 20 . The non-terrestrial wireless communication device of claim 18 , wherein the request indicates a suggested synchronization accuracy level.

Description

CROSS-REFERENCE TO RELATED APPLICATION This Patent Application is a 371 national stage of PCT Application No. PCT/CN2021/084329 filed on Mar. 31, 2021, entitled “SYNCHRONIZATION ACCURACY FOR REDUCED CAPACITY USER EQUIPMENT IN A NON-TERRESTRIAL NETWORK,” and assigned to the assignee hereof. The disclosure of the prior Application is considered part of and is incorporated by reference into this Patent Application. FIELD OF THE DISCLOSURE Aspects of the present disclosure generally relate to wireless communication and to techniques and apparatuses for synchronization accuracy for a reduced capacity user equipment in a non-terrestrial network. BACKGROUND 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 (e.g., bandwidth, transmit power, or the like). 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, time division synchronous code division multiple access (TD-SCDMA) systems, and Long Term Evolution (LTE). LTE/LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3GPP). A wireless network may include a number of base stations (BSs) that can support communication for a number of user equipment (UEs). A UE may communicate with a BS via the downlink and uplink. “Downlink” (or “forward link”) refers to the communication link from the BS to the UE, and “uplink” (or “reverse link”) refers to the communication link from the UE to the BS. As will be described in more detail herein, a BS may be referred to as a Node B, a gNB, an access point (AP), a radio head, a transmit receive point (TRP), a New Radio (NR) B S, a 5G Node B, or the like. The above multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different user equipment to communicate on a municipal, national, regional, and even global level. NR, which may also be referred to as 5G, is a set of enhancements to the LTE mobile standard promulgated by the 3GPP. NR is designed to better support mobile broadband Internet access by improving spectral efficiency, lowering costs, improving services, making use of new spectrum, and better integrating with other open standards using orthogonal frequency division multiplexing (OFDM) with a cyclic prefix (CP) (CP-OFDM) on the downlink (DL), using CP-OFDM and/or SC-FDM (e.g., also known as discrete Fourier transform spread OFDM (DFT-s-OFDM)) on the uplink (UL), as well as supporting beamforming, multiple-input multiple-output (MIND) antenna technology, and carrier aggregation. As the demand for mobile broadband access continues to increase, further improvements in LTE, NR, and other radio access technologies remain useful. SUMMARY In some aspects, a user equipment (UE) for wireless communication includes a memory; and one or more processors, coupled to the memory, configured to: determine a synchronization accuracy level that satisfies a reduced capacity synchronization accuracy threshold, the synchronization accuracy level corresponding to at least one of uplink communications or downlink communications, wherein the UE comprises a reduced capacity UE and wherein the reduced capacity synchronization accuracy threshold is lower than a synchronization accuracy threshold of an enhanced mobile broadband device; and communicate with a non-terrestrial wireless communication device based at least in part on the synchronization accuracy level. In some aspects, a non-terrestrial wireless communication device for wireless communication includes a memory; and one or more processors, coupled to the memory, configured to: determine a synchronization accuracy level, associated with a reduced capacity UE, that satisfies a reduced capacity synchronization accuracy threshold, the synchronization accuracy level corresponding to at least one of uplink communications or downlink communications, wherein the reduced capacity synchronization accuracy threshold is lower than a synchronization accuracy threshold of an enhanced mobile broadband device; and communicate with the reduced capacity UE via a non-terrestrial wireless network based at least in part on the synchronization accuracy level. In some aspects, a method of wireless communication performed by a UE includes determining a synchronization accuracy level that satisfies a reduced capacity synchronization accuracy threshold, the synchronization accuracy level c