EP-4740344-A1 - COMMUNICATIONS USING AN UPLINK-ONLY STATE

Abstract

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a first indication of an allocation of resources associated with a communication. The UE may transmit a negative acknowledgment (NACK) associated with the communication. The UE may receive, based at least in part on transmitting the NACK, a second indication to postpone initiation of an uplink-only state. Numerous other aspects are described.

Inventors

• ZHOU, Zhichao
• MAAMARI, Diana
• ELSHAFIE, AHMED
• Mondet, Mickael

Assignees

• QUALCOMM INCORPORATED

Dates

Publication Date

20260513

Application Date

20230704

Claims (20)

1. A user equipment (UE) for wireless communication, comprising: one or more memories; and one or more processors coupled to the one or more memories, the one or more processors individually or collectively configured to: receive a first indication of an allocation of resources associated with a communication; transmit a negative acknowledgment (NACK) associated with the communication; and receive, based at least in part on the NACK, a second indication to postpone initiation of an uplink-only state.
2. The UE of claim 1, wherein the second indication comprises one or more of a downlink control information (DCI) message or a wake-up signal (WUS) .
3. The UE of claim 1, wherein the one or more processors individually or collectively are further configured to: remain in an uplink and downlink state for a period of time, and initiate the uplink-only state based at least in part on expiration of a retransmission timer.
4. The UE of claim 1, wherein a message that includes the second indication further includes a third indication of a time window during which the UE is to postpone initiation of the uplink-only state.
5. The UE of claim 1, wherein the one or more processors individually or collectively are further configured to initiate the uplink-only state based at least in part on one or more of: receive a retransmission of the communication, or expiration of a timer associated with reception of an allocation of resources associated with the retransmission of the communication.
6. The UE of claim 1, wherein reception of the second indication is based at least in part on an expected retransmission of the communication.
7. A UE for wireless communication, comprising: one or more memories; and one or more processors coupled to the one or more memories, the one or more processors individually or collectively configured to: receive an indication of an allocation of resources associated with a communication; transmit a negative acknowledgment (NACK) associated with the communication; initiate an uplink-only state based at least in part on the NACK; and initiate, after the uplink-only state is initiated, an uplink and downlink state.
8. The UE of claim 7, wherein initiation of the uplink-only state is based at least in part on one or more of: an autonomous decision at the UE, data buffered for uplink transmission by the UE, or a configured timer.
9. The UE of claim 8, wherein initiation of the uplink and downlink state is based at least in part on transmitting the data buffered for uplink transmission by the UE.
10. The UE of claim 9, wherein the one or more processors individually or collectively are further configured to transmit an indication of one or more of: a duration of the uplink-only state that is based at least in part on the data buffered for uplink transmission by the UE, or that the UE is initiating the uplink-only state.
11. The UE of claim 7, wherein initiation of the uplink and downlink state is based at least in part on one or more of: reception of an indication to initiate the uplink and downlink state, or a configured timer associated with reception of a retransmission of the communication.
12. The UE of claim 11, wherein the one or more processors individually or collectively, to receive the indication to initiate the uplink and downlink state, are configured to: receive the indication via a wake up receiver.
13. The UE of claim 11, wherein the indication to initiate the uplink and downlink state comprises one or more of a downlink control information (DCI) message or a wake-up signal (WUS) .
14. The UE of claim 7, wherein the one or more processors individually or collectively are further configured to initiate, after initiating the uplink and downlink state, the uplink-only state based at least in part on one or more of: receive a retransmission of the communication, or expiration of a timer associated with reception of an allocation of resources associated with the retransmission of the communication.
15. The UE of claim 7, wherein the one or more processors individually or collectively are further configured to: receive an indication of an allocation of additional resources associated with an additional communication; transmit an acknowledgment (ACK) associated with the additional communication; and initiate the uplink-only state based at least in part on transmitting the ACK.
16. The UE of claim 7, wherein the one or more processors individually or collectively, to initiate the uplink-only state, are configured to: initiate the uplink-only state after expiration of a retransmission timer, or initiate the uplink-only state after receiving a retransmission of the communication.
17. The UE of claim 7, wherein the one or more processors individually or collectively are further configured to: receive, after initiating the uplink-only state, an indication of an allocation of second resources associated with a retransmission of the communication.
18. The UE of claim 7, wherein the one or more processors individually or collectively are further configured to receive an indication of one or more of: a first duration of a timer associated with reception of an allocation of resources associated with a retransmission of the communication, a second duration of the uplink-only state, or a third duration of the uplink and downlink state.
19. The UE of claim 18, wherein the indication of one or more of the first duration, the second duration, or the third duration is based at least in part on a traffic type of one or more of the communication or an uplink communication.
20. The UE of claim 18, wherein the indication of the one or more of the first duration, the second duration, or the third duration comprises: an indication of a selection of the one or more of the first duration, the second duration or the third duration from a previously indicated set of candidate first durations, candidate second durations, or candidate third durations.

Description

COMMUNICATIONS USING AN UPLINK-ONLY STATE FIELD OF THE DISCLOSURE Aspects of the present disclosure generally relate to wireless communication and to techniques and apparatuses for communications using an uplink-only state. DESCRIPTION OF RELATED ART 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 (for example, bandwidth, transmit power, etc. ) . 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 one or more network nodes that support communication for wireless communication devices, such as a user equipment (UE) or multiple UEs. A UE may communicate with a network node via downlink communications and uplink communications. “Downlink” (or “DL” ) refers to a communication link from the network node to the UE, and “uplink” (or “UL” ) refers to a communication link from the UE to the network node. Some wireless networks may support device-to-device communication, such as via a local link (e.g., a sidelink (SL) , a wireless local area network (WLAN) link, and/or a wireless personal area network (WPAN) link, among other examples) . These multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different UEs to communicate on a municipal, national, regional, or global level. New Radio (NR) , which also may 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, using CP-OFDM or single-carrier frequency division multiplexing (SC-FDM) (also known as discrete Fourier transform spread OFDM (DFT-s-OFDM) ) on the uplink, as well as supporting beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation. SUMMARY Some aspects described herein relate to a method of wireless communication performed by a user equipment (UE) . The method may include receiving a first indication of an allocation of resources associated with a communication. The method may include transmitting a negative acknowledgment (NACK) associated with the communication. The method may include receiving, based at least in part on transmitting the NACK, a second indication to postpone initiation of an uplink-only state. Some aspects described herein relate to a method of wireless communication performed by a UE. The method may include receiving an indication of an allocation of resources associated with a communication. The method may include transmitting a NACK associated with the communication. The method may include initiating an uplink-only state based at least in part on transmitting the NACK. The method may include initiating, after initiating the uplink-only state, an uplink and downlink state. Some aspects described herein relate to a UE for wireless communication. The UE may include one or more memories and one or more processors coupled to the one or more memories. The one or more processors may be configured to receive a first indication of an allocation of resources associated with a communication. The one or more processors may be configured to transmit a NACK associated with the communication. The one or more processors may be configured to receive, based at least in part on transmitting the NACK, a second indication to postpone initiation of an uplink-only state. Some aspects described herein relate to a UE for wireless communication. The UE may include one or more memories and one or more processors coupled to the  one or more memories. The one or more processors may be configured to receive an indication of an allocation of resources associated with a communication. The one or more processors may be configured to transmit a NACK associated with the communication. The one or more processors may be configured to initiate an uplink-only state based at least in part on transmitting the NACK. The one or