Terminal Device COT Sharing Indication for Unlicensed Band Downlink
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Solution Overview
Problem
There is a lack of effective methods for a terminal device to signal necessary information to a network device for downlink transmission during uplink channel occupancy time (COT) sharing in unlicensed bands.
Innovation Solution
The terminal device sends first indication information to the network device, indicating whether the initiated COT is allowed to be shared for downlink transmission. The network device receives this information and determines the appropriate time domain resources for downlink transmission based on the indication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the terminal device initiates uplink COT in unlicensed band, then uplink transmission can be performed, but the network device cannot perform downlink transmission in the same COT due to lack of signaling mechanism
Solution Approach 1:
The patent introduces first indication information as an intermediary signaling mechanism carried in the uplink signal from the terminal device to the network device. This intermediary carries the COT sharing indication, enabling the network device to understand and utilize the terminal's COT for downlink transmission without direct negotiation or complex protocols.
Solution Approach 2:
The terminal device performs preliminary action by including the first indication information in its uplink transmission before the COT expires. This preliminary signaling allows the network device to prepare and schedule downlink transmissions within the remaining COT period, maximizing utilization before the terminal's COT ends.
2Loss of energy
If the network device wants to perform downlink transmission in terminal's COT, then spectrum utilization improves, but the terminal device cannot signal its intention to share COT
Solution Approach 1:
The first indication information serves as a simple intermediary that the terminal device can easily include in its uplink transmission. This intermediary provides the network device with the necessary knowledge to perform downlink transmission in the shared COT without requiring complex bidirectional negotiation protocols or additional signaling messages.
Solution Approach 2:
The terminal device performs self-service by autonomously deciding whether to share its COT and by including the first indication information in its own uplink transmission. This eliminates the need for separate COT sharing negotiation procedures or network-initiated signaling, simplifying the overall protocol while enabling spectrum utilization.
3Productivity
If COT sharing is enabled without indication information, then downlink transmission can occur, but the network device cannot determine whether to share the COT
Solution Approach 1:
The first indication information provides essential feedback from the terminal device to the network device about its COT sharing intent. This feedback mechanism enables the network device to make accurate decisions about whether to perform downlink transmission in the shared COT, ensuring reliable and appropriate COT utilization based on actual terminal capabilities and needs.
Data Source
AI summary
A method for sharing channel occupancy time (COT), a terminal device, and a network device are provided. The method includes that: a terminal device sends first indication information to a network device, the first indication information indicating whether a first COT initiated by the terminal device is allowed to be shared with the network device.