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US-12621858-B2 - Configuration for user equipment (UE)-initiated channel occupancy time (COT) in frame-based equipment (FBE) mode

US12621858B2US 12621858 B2US12621858 B2US 12621858B2US-12621858-B2

Abstract

Wireless communication systems and methods related to configuration for user equipment (UE)-initiated channel occupancy time (COT) in a frame-based equipment (FBE) mode are provided. A user equipment (UE) receives, from a base station (BS), a configuration for the UE to initiate a COT in an FBE mode. The configuration indicates a first FBE frame period. The UE initiates the COT in a first FBE frame having the first FBE frame period. The UE transmits, to the BS during the COT, an uplink communication signal.

Inventors

  • Changlong Xu
  • Jing Sun
  • Xiaoxia Zhang

Assignees

  • QUALCOMM INCORPORATED

Dates

Publication Date
20260505
Application Date
20200911

Claims (20)

  1. 1 . A method of wireless communication performed by a user equipment (UE), the method comprising: receiving, from a base station (BS), a configuration for the UE to initiate a channel occupancy time (COT) in a frame-based equipment (FBE) mode, the configuration indicating a first FBE frame period that is offset from a boundary of a second FBE frame period of the BS; initiating, based at least in part on a UE-initiated COT recurring period that is longer than the first FBE frame period, the COT in a first FBE frame having the first FBE frame period; and transmitting, to the BS during the COT, an uplink communication signal.
  2. 2 . The method of claim 1 , wherein: the first FBE frame period is one of a first set of FBE frame periods associated with the UE; and the receiving comprises: receiving, from the BS, the configuration during a second FBE frame having a second FBE frame period, the second FBE frame period being one of a second set of FBE frame periods associated with the BS.
  3. 3 . The method of claim 2 , wherein the first FBE frame period is different than the second FBE frame period.
  4. 4 . The method of claim 2 , wherein the first set of FBE frame periods and the second set of FBE frame periods include at least one different FBE frame period.
  5. 5 . The method of claim 2 , wherein the first set of FBE frame periods is the same as the second set of FBE frame periods.
  6. 6 . The method of claim 2 , wherein the first FBE frame period is an integer multiple of the second FBE frame period.
  7. 7 . The method of claim 2 , wherein the first FBE frame period is an integer factor of the second FBE frame period.
  8. 8 . The method of claim 1 , wherein the receiving comprises: receiving, from the BS, a radio resource control (RRC) configuration including the configuration.
  9. 9 . The method of claim 1 , further comprising: receiving, from the BS during the COT based on COT sharing, a downlink communication signal.
  10. 10 . A method of wireless communication performed by a base station (BS), the method comprising: transmitting, to a user equipment (UE), a configuration for the UE to initiate a channel occupancy time (COT) in a frame-based equipment (FBE) mode, the configuration indicating a first FBE frame period that is offset from a boundary of a FBE frame period of the BS, wherein the COT is based on a UE-initiated COT recurring period that is longer than the first FBE frame period; and receiving, from the UE during a channel occupancy time (COT) associated with the UE, an uplink communication signal, the COT being within a first FBE frame having the first FBE frame period.
  11. 11 . The method of claim 10 , wherein: the first FBE frame period is one of a first set of FBE frame periods associated with the UE; and the transmitting comprises: transmitting, to the UE, the configuration during a second FBE frame having a second FBE frame period, the second FBE frame period being one of a second set of FBE frame periods associated with the BS.
  12. 12 . The method of claim 11 , wherein the first FBE frame period is different than the second FBE frame period.
  13. 13 . The method of claim 11 , wherein the first set of FBE frame periods and the second set of FBE frame periods include at least one different FBE frame period.
  14. 14 . The method of claim 11 , wherein the first set of FBE frame periods is the same as the second set of FBE frame periods.
  15. 15 . The method of claim 11 , wherein the first FBE frame period is an integer multiple of the second FBE frame period.
  16. 16 . The method of claim 11 , wherein the first FBE frame period is an integer factor of the second FBE frame period.
  17. 17 . The method of claim 10 , wherein the transmitting comprises: transmitting, to the UE, a radio resource control (RRC) configuration including the configuration.
  18. 18 . The method of claim 10 , further comprising: transmitting, to the UE during the COT associated with the UE based on COT sharing, a downlink communication signal.
  19. 19 . A user equipment (UE) comprising: a transceiver configured to: receive, from a base station (BS), a configuration for the UE to initiate a channel occupancy time (COT) in a frame-based equipment (FBE) mode, the configuration indicating a first FBE frame period that is offset from a boundary of a second FBE frame period of the BS; and transmit, to the BS during the COT, an uplink communication signal; and a processor configured to initiate, based at least in part on a UE-initiated COT recurring period that is longer than the first FBE frame period, the COT in a first FBE frame having the first FBE frame period.
  20. 20 . The UE of claim 19 , wherein: the first FBE frame period is one of a first set of FBE frame periods associated with the UE; and the transceiver configured to receive the configuration is configured to: receive, from the BS, the configuration during a second FBE frame having a second FBE frame period, the second FBE frame period being one of a second set of FBE frame periods associated with the BS.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS The present application is a 35 U.S.C. 371 National Phase entry of Patent Cooperation Treaty (PCT) Application No. PCT/CN2020/114773, filed Sep. 11, 2020, which is hereby expressly incorporated herein by reference in its entirety. TECHNICAL FIELD This application relates to wireless communication systems and methods, and more particularly to configuration for user equipment (UE)-initiated channel occupancy time (COT) in a frame-based equipment (FBE) mode for communications over a shared radio frequency band. INTRODUCTION Wireless communications systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems may be capable of supporting communication with multiple users by sharing the available system resources (e.g., time, frequency, and power). A wireless multiple-access communications system may include a number of base stations (BSs), each simultaneously supporting communications for multiple communication devices, which may be otherwise known as user equipment (UE). To meet the growing demands for expanded mobile broadband connectivity, wireless communication technologies are advancing from the long-term evolution (LTE) technology to a next generation new radio (NR) technology, which may be referred to as 5th Generation (5G). For example, NR is designed to provide a lower latency, a higher bandwidth or a higher throughput, and a higher reliability than LTE. NR is designed to operate over a wide array of spectrum bands, for example, from low-frequency bands below about 1 gigahertz (GHz) and mid-frequency bands from about 1 GHz to about 6 GHz, to high-frequency bands such as millimeter wave (mmWave) bands. NR is also designed to operate across different spectrum types, from licensed spectrum to unlicensed and shared spectrum. Spectrum sharing enables operators to opportunistically aggregate spectrums to dynamically support high-bandwidth services. Spectrum sharing can extend the benefit of NR technologies to operating entities that may not have access to a licensed spectrum. One approach to avoiding collisions when communicating in a shared spectrum or an unlicensed spectrum is to use a listen-before-talk (LBT) procedure to ensure that the shared channel is clear before transmitting a signal in the shared channel. The operations or deployments of NR in an unlicensed spectrum is referred to as NR-U. In NR-U, a BS may schedule a UE for an UL transmission in an unlicensed frequency band. The UE may perform an LBT procedure prior to the scheduled time. When the LBT is a success, the UE may proceed to transmit UL data according to the schedule. When the LBT fails, the UE may refrain from transmitting. BRIEF SUMMARY OF SOME EXAMPLES The following summarizes some aspects of the present disclosure to provide a basic understanding of the discussed technology. 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 summary form as a prelude to the more detailed description that is presented later. For example, in an aspect of the disclosure, a method of wireless communication performed by a user equipment (UE), the method includes receiving, from a base station (BS), a configuration for the UE to initiate a channel occupancy time (COT) in a frame-based equipment (FBE) mode, the configuration indicating a first FBE frame period; initiating the COT in a first FBE frame having the first FBE frame period; and transmitting, to the BS during the COT, an uplink communication signal. In an additional aspect of the disclosure, a method of wireless communication performed by a base station (BS), the method includes transmitting, to a user equipment (UE), a configuration for the UE to initiate a channel occupancy time (COT) in a frame-based equipment (FBE) mode, the configuration indicating a first FBE frame period; and receiving, from the UE during a channel occupancy time (COT) associated with the UE, an uplink communication signal, the COT being within a first FBE frame having the first FBE frame period. In an additional aspect of the disclosure, a user equipment (UE) includes a transceiver configured to receive, from a base station (BS), a configuration for the UE to initiate a channel occupancy time (COT) in a frame-based equipment (FBE) mode, the configuration indicating a first FBE frame period; and transmit, to the BS during the COT, an uplink communication signal; and a processor configured to initiate the COT in a first FBE frame having the first FBE frame period. In an additional aspect of the disclosure, a base station (BS) includes a transceiver configured to transmit, to a user equipment (UE), a conf