Channel Occupation Spatial Information Indication in NR-U
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Solution Overview
Problem
In existing 5G New Radio (NR) unlicensed spectrum (NR-U) technology, the necessary information for sharing channel resources between network devices and terminal devices is not fully indicated, leading to inefficiencies in channel occupation and resource utilization.
Innovation Solution
The proposed solution involves indicating channel-occupation spatial information, including LBT directional information, through control signaling such as DCI carrying UL grants, Msg2 in random access procedures, and group common PDCCH, to enable accurate channel sensing and resource sharing between network devices and terminal devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If channel resources are shared between network device and terminal device in NR-U system, then resource utilization is improved, but the necessary information for sharing cannot be fully indicated leading to inconsistencies
Solution Approach 1:
The patent introduces control signaling as an intermediary carrier to transmit channel-occupation spatial information between the network device and terminal device. This intermediary mechanism ensures that all necessary information for channel resource sharing is properly indicated and transmitted, resolving the information loss problem while maintaining improved resource utilization efficiency.
2Productivity
If channel occupation time is extended to improve resource utilization, then productivity increases, but channel sensing accuracy decreases due to insufficient spatial information
Solution Approach 1:
The patent applies preliminary action by indicating channel-occupation spatial information in advance through control signaling before the actual channel transmission occurs. This allows the terminal device to perform accurate channel sensing with complete spatial information, enabling extended channel occupation time without sacrificing sensing accuracy.
3Measurement precision
If spatial information is added to channel occupation indication, then channel sensing accuracy is improved, but control signaling complexity increases
Solution Approach 1:
The patent makes the control signaling multi-functional by using it to convey both existing channel occupation information and the additional channel-occupation spatial information. This universal approach allows the same control signaling mechanism to handle both functions without requiring separate dedicated signaling channels, thus improving sensing accuracy while limiting the increase in overall system complexity.
Data Source
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AI summary
This application relates to an information determination method, an information indication method, a terminal device and a network device, being able to enable the terminal device or the network device to determine necessary information required for sharing when sharing a channel resource occupied by the opposite end. The information determination method comprises: acquiring spatial information about channel occupation; and according to the spatial information about channel occupation, determining spatial information about channel sensing of a terminal device.