US-12621690-B2 - Method and device for channel monitoring in wireless communication

Abstract

A user equipment (UE) is configured to transmit a first signal and determine a target reference signal based on the first signal. The UE is configured to monitor a first-type channel in a first resource set. The UE is configured to receive a downlink control information (DCI) that is used to schedule a first channel. The UE is configured to determine a target time based on the DCI and determine a first transmission state. The UE is configured to continue to monitor the first-type channel in the first resource set after the target time on a condition that the first transmission state is only applied for the first channel. The UE is configured to stop monitoring the first-type channel in the first resource set after the target time on a condition that the first transmission state is also applied for at least a second channel apart from the first channel.

Inventors

• Keying Wu
• Xiaobo Zhang

Assignees

• Apogee 5G Global, LLC

Dates

Publication Date

20260505

Application Date

20230506

Priority Date

20201207

Claims (18)

1. 1 . A user equipment (UE) configured for wireless communications, the UE comprising: a receiver; a transmitter; and a processor, wherein: the transmitter is configured to transmit a first signal; the processor is configured to determine a target reference signal based on the first signal; the processor and the receiver are configured to, in response to transmission of the first signal, monitor a first-type channel in a resource set; the receiver and the processor are configured to receive a downlink control information (DCI), wherein the DCI is used to schedule a first channel; the processor is configured to determine a target time based on the DCI; the processor is configured to determine a transmission state; the processor and the receiver are configured to continue to monitor the first-type channel in the resource set after the target time on a condition that the transmission state is only applied for the first channel; and the processor and the receiver are configured to stop monitoring the first-type channel in the resource set after the target time on a condition that the transmission state is also applied for at least a second channel apart from the first channel.
2. 2 . The UE of claim 1 , wherein first information is used to determine whether the transmission state is also applied for at least the second channel apart from the first channel.
3. 3 . The UE of claim 1 , wherein when each condition in a first condition set is satisfied, the processor is configured to stop monitoring the first-type channel in the resource set after the target time when the transmission state is also applied for at least the second channel apart from the first channel, wherein the first condition set comprises at least one condition.
4. 4 . The UE of claim 3 , wherein the first condition set comprises that the DCI is transmitted in the resource set.
5. 5 . The UE of claim 3 , wherein the first condition set comprises that the UE does not receive a second-type signaling after transmitting the first signal and before receiving the DCI.
6. 6 . The UE of claim 1 , wherein the transmitter is configured to transmit a second signal wherein the second signal is used to determine that the DCI is correctly received, wherein time-domain resources occupied by the second signal are used to determine the target time, wherein the DCI is used to determine the time-domain resources occupied by the second signal.
7. 7 . The UE of claim 6 , wherein the processor and the receiver are configured to receive a third signal in the first channel, wherein the DCI comprises scheduling information of the third signal, wherein the second signal comprises a hybrid automatic-repeat request acknowledgement (HARQ-ACK) for the third signal.
8. 8 . A method for use in a user equipment (UE) for wireless communication, the method comprising: transmitting a first signal; determining a target reference signal based on the first signal; monitoring, in response to transmitting the first signal, a first-type channel in a first resource set; receiving a downlink control information (DCI), wherein the DCI is used to schedule a first channel; determining a target time based on the DCI; determining a first transmission state; continuing monitoring the first-type channel in the first resource set after the target time on a condition that the first transmission state is only applied for the first channel; and stopping monitoring the first-type channel in the first resource set after the target time on a condition that the first transmission state is also applied for at least a second channel apart from the first channel.
9. 9 . The method of claim 8 , wherein first information is used to determine whether the transmission state is also applied for at least the second channel apart from the first channel.
10. 10 . The method of claim 8 , wherein when each condition in a first condition set is satisfied, the method further comprises: stopping monitoring the first-type channel in the resource set after the target time when the transmission state is also applied for at least the second channel apart from the first channel, wherein the first condition set comprises at least one condition.
11. 11 . The method of claim 10 , wherein the first condition set comprises that the DCI is transmitted in the resource set.
12. 12 . The method of claim 10 , wherein the first condition set comprises that the UE does not receive a second-type signaling after transmitting the first signal and before receiving the DCI.
13. 13 . The method of claim 8 , further comprising: transmitting a second signal, wherein the second signal is used to determine that the DCI is correctly received, wherein time-domain resources occupied by the second signal are used to determine the target time, wherein the DCI is used to determine the time-domain resources occupied by the second signal.
14. 14 . The method of claim 13 , further comprising: receiving a third signal in the first channel, wherein the DCI comprises scheduling information of the third signal, wherein the second signal comprises a hybrid automatic-repeat request acknowledgement (HARQ-ACK) for the third signal.
15. 15 . The UE of claim 1 , wherein the DCI is used for random access.
16. 16 . The UE of claim 1 , wherein the processor is configured to assumes same quasi-colocated (QCL) parameters as the target reference signal.
17. 17 . The method of claim 8 , wherein the DCI is used for random access.
18. 18 . The method of claim 8 , wherein the UE assumes same quasi-colocated (QCL) parameters as the target reference signal.

Description

CROSS REFERENCE TO RELATED APPLICATIONS This application is the continuation of the international patent application No. PCT/CN2021/135658, filed on Dec. 6, 2021, and claims the priority benefit of Chinese Patent Application No. 202011417501.1 filed on Dec. 7, 2020, the full disclosure of which is incorporated herein by reference. BACKGROUND Technical Field The present application relates to transmission methods and devices in wireless communication systems, and in particular to a method and device for radio signal transmission in a wireless communication system supporting cellular networks. Related Art The Multi-antenna technique is a key part in the 3rd Generation Partner Project (3GPP) Long-term Evolution (LTE) and New Radio (NR) systems. More than one antenna can be configured, at the communication node, e.g., a base station or a User Equipment (UE), to obtain extra degree of freedom in space. Multiple antennas form through beamforming a beam pointing in a specific direction to enhance the communication quality. When the multiple antennas belong to multiple Transmitter Receiver Points (TRPs)/panels, spatial differences between TRPs/panels can be taken advantage of to obtain extra diversity gains. Since the beam formed by multiple antennas through beamforming is generally narrow, beams from both sides of communications are required to be aligned for performing effective communications. When transmitting/receiving beams are out of sync due to factors like UE mobility, a drastic reduction of communication quality will be seen, and even worse, the communications may be failed. In NR Release (R) 15 and 16, beam management is used for beam selection, updating and indication between both sides of communications, hence the performance gains obtained from multiple antennas. SUMMARY In NR R15 and R16, different beam management/indication mechanisms are respectively adopted by a control channel and a data channel, and for the uplink and the downlink. However, in many cases the control channel and the data channel can use the same beam, and since there exists channel reciprocity between an uplink channel and a downlink channel under many application scenarios, the same beam is also applicable. The complexity of the system can be greatly reduced exploiting such characteristic, so can the signaling overhead and the delay. At the 3GPP Radio Access Network (RAN) 1 #103e conference, the technique of using physical layer signaling to update beams for both the control channel and the data channel has been approved, which means that in scenarios where there exists reciprocity between uplink and downlink channels, the physical layer signaling can be used for updating uplink beams and downlink beams simultaneously. How the adoption of the technique will influence some of the existing beam-related functions is an issue to be solved. To address the above problem, the present application provides a solution. It should be noted that although the statement above only took the example of cellular networks, the present application also applies to other scenarios like Vehicle-to-Everything (V2X), where similar technical effects can be achieved. Additionally, the adoption of a unified solution for various scenarios, including but not limited to cellular networks and V2X, contributes to the reduction of hardcore complexity and costs. In the case of no conflict, the embodiments of a first node and the characteristics in the embodiments may be applied to a second node, and vice versa. What's more, the embodiments in the present application and the characteristics in the embodiments can be arbitrarily combined if there is no conflict. In one embodiment, interpretations of the terminology in the present application refer to definitions given in the 3GPP TS36 series. In one embodiment, interpretations of the terminology in the present application refer to definitions given in the 3GPP TS38 series. In one embodiment, interpretations of the terminology in the present application refer to definitions given in the 3GPP TS37 series. In one embodiment, interpretations of the terminology in the present application refer to definitions given in Institute of Electrical and Electronics Engineers (IEEE) protocol specifications. The present application provides a method in a first node for wireless communications, comprising: transmitting a first signal;as a response to the action of transmitting the first signal, monitoring a first-type channel in a first resource set;receiving a first signaling, the first signaling being used to determine a target time; andcontinuing monitoring the first-type channel in the first resource set after the target time, or, stopping monitoring the first-type channel in the first resource set after the target time;herein, the first signal is used for a random access, and the first signal is used to determine a target reference signal; for the monitoring of the first-type channel in the first resource set, the first node a