US-12628234-B2 - Techniques for switching between configured grant modes

Abstract

Methods, systems, and devices for wireless communication at a user equipment (UE) are described. A UE may receive control signaling configuring at least a first UE operation mode and a second UE operation mode. The UE may transmit one or more uplink messages to a base station in the unlicensed radio frequency spectrum band using a first set of parameters according to the first UE operation mode. In some examples, the UE may receive a control message comprising an indication that the UE is to switch from communicating according to the first configured UE operation mode to communicating according to the second configured UE operation mode. The UE may then transmit, in response to the received indication, one or more uplink messages to the base station in the unlicensed radio frequency spectrum band using a second set of parameters according to the second UE operation mode.

Inventors

• Shaozhen Guo
• Xiaoxia Zhang
• Changlong Xu
• Jing Sun
• Rajat Prakash
• Ozcan Ozturk

Assignees

• QUALCOMM INCORPORATED

Dates

Publication Date

20260512

Application Date

20210305

Claims (20)

1. 1 . A method for wireless communication at a user equipment (UE), comprising: receiving, from a base station, control signaling configuring at least a first UE operation mode and a second UE operation mode, the first UE operation mode indicating a first set of parameters for the UE to use for uplink communications in an unlicensed radio frequency spectrum band, and the second UE operation mode indicating a second set of parameters for the UE to use for uplink communications in the unlicensed radio frequency spectrum band; transmitting one or more uplink messages to the base station in the unlicensed radio frequency spectrum band using the first set of parameters; receiving a control message comprising an indication that the UE is to switch from communicating according to the first configured UE operation mode to communicating according to the second configured UE operation mode; and transmitting, in response to the received indication, one or more uplink messages to the base station in the unlicensed radio frequency spectrum band using the second set of parameters according to the second UE operation mode.
2. 2 . The method of claim 1 , wherein receiving the control signaling comprises: receiving a configuration indicating resources granted to the UE for communication in the unlicensed radio frequency spectrum band, the configuration associated with at least the first UE operation mode and the second UE operation mode.
3. 3 . The method of claim 1 , wherein receiving the control signaling comprises: receiving a first configuration indicating resources granted to the UE for communication in the unlicensed radio frequency spectrum band according to the first set of parameters, the first configuration of resources being associated with the first UE operation mode; and receiving a second configuration indicating resources granted to the UE for communication in the unlicensed radio frequency spectrum band according to the second set of parameters, the second configuration of resources being associated with the second UE operation mode.
4. 4 . The method of claim 1 , further comprising: transmitting a request to update to a UE operation mode from the first configured UE operation mode to the second configured UE operation mode, wherein receiving the control message is at least in part in response to transmitting the request.
5. 5 . The method of claim 4 , wherein the request comprises at least a bit indicating a request to switch a UE operation mode, a bit field indicating an identity of a serving cell associated with the request, and a bit field indicating an identity of a bandwidth part associated with the request.
6. 6 . The method of claim 4 , wherein the request comprises at least a bitmap indicating a request to switch a UE operation mode for each configuration of resources, a bit field indicating an identity of a serving cell associated with the request, and a bit field indicating an identity of a bandwidth part associated with the request.
7. 7 . The method of claim 1 , further comprising: transmitting, to the base station, a feedback message in response to receiving the control message, the feedback message indicating that the UE is to switch from communicating according to the first configured UE operation mode to communicating according to the second configured UE operation mode.
8. 8 . The method of claim 7 , wherein the feedback message is transmitted during a first time slot and the uplink messages using the second set of parameters according to the second UE operation mode are transmitted during a second time slot, the second time slot is at least a threshold number of time slots after the first time slot.
9. 9 . The method of claim 1 , further comprising: determining an interference condition associated with uplink communications in the unlicensed radio frequency spectrum band; and transmitting, based at least in part on the interference condition satisfying a threshold, a second control message requesting an update to a UE operation mode from the first configured UE operation mode to the second configured UE operation mode.
10. 10 . The method of claim 1 , wherein at least one of the first UE operation mode and the second UE operation mode is associated with a reconfiguration timer.
11. 11 . The method of claim 1 , further comprising: receiving, from the base station, an indication of a default UE operation mode that comprises one of the first UE operation mode or the second UE operation mode.
12. 12 . The method of claim 1 , wherein the indication of the control message comprises at least a bit indicating for the UE to switch a UE operation mode, a bit field indicating an identity of a serving cell associated with the UE operation mode switch, and a bit field indicating an identity of a bandwidth part associated with the UE operation mode switch.
13. 13 . The method of claim 1 , wherein the indication of the control message comprises at least a bitmap indicating an operation mode switch for each configuration of resources, a bit field indicating an identity of a serving cell associated with the UE operation mode switch, and a bit field indicating an identity of a bandwidth part associated with the UE operation mode switch.
14. 14 . The method of claim 1 , wherein the first UE operation mode comprises an ultra-reliable low-latency communication (URLLC) operation mode, and the second UE operation mode comprises a new radio (NR) in unlicensed spectrum (NR-U) operation mode.
15. 15 . A method for wireless communication at a base station, comprising: transmitting, to a user equipment (UE), control signaling configuring at least a first UE operation mode and a second UE operation mode, the first UE operation mode indicating a first set of parameters for the UE to use for uplink communications in an unlicensed radio frequency spectrum band, and the second UE operation mode indicating a second set of parameters for the UE to use for uplink communications in the unlicensed radio frequency spectrum band; receiving one or more uplink messages from the UE in the unlicensed radio frequency spectrum band using the first set of parameters; transmitting a control message comprising an indication that the UE is to switch from communicating according to the first configured UE operation mode to communicating according to the second configured UE operation mode; and receiving, in response to the transmitted indication, one or more uplink messages from the UE in the unlicensed radio frequency spectrum band using the second set of parameters according to the second UE operation mode.
16. 16 . The method of claim 15 , wherein transmitting the control signaling comprises: a configuration indicating resources granted to the UE for communication in the unlicensed radio frequency spectrum band, the configuration associated with at least the first UE operation mode and the second UE operation mode.
17. 17 . The method of claim 15 , wherein transmitting the control signaling comprises: transmitting a first configuration indicating resources granted to the UE for communication in the unlicensed radio frequency spectrum band according to the first set of parameters, the first configuration of resources being associated with the first UE operation mode; and transmitting a second configuration indicating resources granted to the UE for communication in the unlicensed radio frequency spectrum band according to the second set of parameters, the second configuration of resources being associated with the second UE operation mode.
18. 18 . The method of claim 15 , further comprising: receiving a request to update to a UE operation mode from the first configured UE operation mode to the second configured UE operation mode, wherein transmitting the control message is at least in part in response to receiving the request.
19. 19 . The method of claim 18 , wherein the request comprises at least a bit indicating a request to switch a UE operation mode, a bitmap indicating a request to switch a UE operation mode for each configuration of resources, a bit field indicating an identity of a serving cell associated with the request, and a bit field indicating an identity of a bandwidth part associated with the request.
20. 20 . The method of claim 15 , further comprising: receiving, from the UE, a feedback message in response to transmitting the control message, the feedback message indicating that the UE is to switch from communicating according to the first configured UE operation mode to communicating according to the second configured UE operation mode.

Description

CROSS REFERENCE The present application is a 371 national stage filing of International PCT Application No. PCT/CN2021/079248 by GUO et al. entitled “TECHNIQUES FOR SWITCHING BETWEEN CONFIGURED GRANT MODES,” filed Mar. 5, 2021, which is assigned to the assignee hereof, and which is expressly incorporated by reference in its entirety herein. FIELD OF TECHNOLOGY The following relates to wireless communication at a user equipment (UE), including techniques for switching between configured grant (CG) modes. BACKGROUND 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). Examples of such multiple-access systems include fourth generation (4G) systems such as Long Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, or LTE-A Pro systems, and fifth generation (5G) systems which may be referred to as New Radio (NR) systems. These systems may employ technologies such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal FDMA (OFDMA), or discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM). A wireless multiple-access communications system may include one or more base stations or one or more network access nodes, each simultaneously supporting communication for multiple communication devices, which may be otherwise known as user equipment (UE). Some wireless communications systems may support downlink and uplink communications from and to multiple base stations. Some wireless communications systems may also support communications over some physical channels, such as physical downlink shared channel (PDSCH) and physical uplink shared channel (PUSCH). As demand for communication efficiency increases, it may be desirable to provide improvements to communications from and to one or more base stations, among other examples. SUMMARY The described techniques relate to improved methods, systems, devices, and apparatuses that support techniques for switching between configured grant (CG) modes. Generally, the described techniques provide for configuring a communication device, which may be otherwise known as user equipment (UE) to support dynamic switching of CG modes when communicating from and to one or more base station. In some examples, a wireless communications system operating in unlicensed spectrum may support different CG modes, for example, ultra-reliable low-latency communications (URLLC) or an unlicensed new radio (NR-U) communications. In examples, communication according a URLLC CG mode may operate according to lower latency parameters, higher-reliability parameters, or both, than other communication modes, including other CG modes, for example an NR-U CG mode. A UE may support both URLLC CG mode and NR-U CG mode. One or more aspects of the present disclosure provide for techniques for dynamic switching between URLLC CG mode and NR-U CG mode. For examples, a UE may be configured by a base station with one or more CG configurations associated with URLLC CG mode and NR-U CG mode. For example, the base station may transmit control signaling configuring at least a first UE operation mode (e.g., URLLC CG mode) and a second UE operation mode (e.g., NR-U CG mode). In some examples, the base station may use a control message to switch the UE between the two modes. For example, when the UE is configured with a URLLC CG mode, the base station may transmit a control message indicating that the UE is to switch from the URLLC CG mode to the NR-U CG mode. Thus, the described techniques may, as a result, include features for improvements to uplink communications and, in some examples, may promote enhanced efficiency for high reliability and low latency uplink operations in 5G systems, among other benefits. A method for wireless communication at a UE is described. The method may include receiving, from a base station, control signaling configuring at least a first UE operation mode and a second UE operation mode, the first UE operation mode indicating a first set of parameters for the UE to use for uplink communications in an unlicensed radio frequency spectrum band, and the second UE operation mode indicating a second set of parameters for the UE to use for uplink communications in the unlicensed radio frequency spectrum band, transmitting one or more uplink messages to the base station in the unlicensed radio frequency spectrum band using the first set of parameters, receiving a control message including an indication that the UE is to switch from communicating according to the first configured UE operation mode to communicating according to the second configured UE operation mode, and transmitting, in response to the received indication, o