PDSCH Reception Mode Selection for COT Boundary Management
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Solution Overview
Problem
In 5G new radio (NR) systems, the physical downlink shared channel (PDSCH) often exceeds the end position of the channel occupancy time (COT), leading to inefficiencies in data transmission due to the need for re-scheduling and channel re-occupation, which increases DCI overhead and complicates data processing for user devices.
Innovation Solution
A method is introduced that allows user devices to operate in two different PDSCH receiving modes: one where they stop receiving data after the COT and another where they continue receiving data beyond the COT, enabling efficient handling of PDSCHs that exceed the COT by determining the receiving mode based on control indication information, thereby optimizing data processing and reducing re-scheduling needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the PDSCH reception continues after the COT ends, then data transmission completeness is improved, but channel occupancy time management becomes more complex
Solution Approach 1:
The patent introduces dynamic PDSCH reception modes that can switch between first mode (stop receiving at COT end) and second mode (continue receiving beyond COT). This dynamic adaptability allows the system to optimize between channel occupancy management and data transmission completeness based on actual transmission needs, resolving the contradiction between these two requirements.
2Quantity of substance
If multi-slot PDSCH scheduling is configured, then DCI overhead is reduced, but scheduling complexity increases
Solution Approach 1:
The patent segments the PDSCH reception process into multiple slots with different reception modes. By dividing the reception timeline into segments (before COT end and after COT end), the system can manage scheduling complexity while maintaining reduced DCI overhead through multi-slot configuration.
Solution Approach 2:
The patent changes the reception mode parameter dynamically based on the COT status. By adjusting the reception mode (first mode or second mode) according to whether the PDSCH falls within or exceeds the COT, the system optimizes the balance between scheduling simplicity and data transmission efficiency.
3Reliability
If the user device stops receiving PDSCH at the end of COT, then channel occupancy time compliance is improved, but data reception completeness deteriorates
Solution Approach 1:
The patent enables dynamic switching between two reception modes: first mode for strict COT compliance and second mode for continued reception beyond COT. This dynamic capability allows the system to adapt to different scenarios and resolve the contradiction between channel occupancy compliance and data reception completeness.
Solution Approach 2:
The patent changes the reception behavior parameter based on the COT status and scheduling configuration. By adjusting whether to stop or continue receiving at the COT boundary, the system optimizes the balance between regulatory compliance and data transmission efficiency.
Data Source
AI summary
Provided in the present disclosure are a method and apparatus for receiving and sending a physical downlink shared channel, and a medium. The method includes: determining a PDSCH receiving manner, wherein the PDSCH receiving manner is a first manner or a second manner, the first manner corresponds to after a user device detects control indication information which includes a COT ending position, receiving a PDSCH that is located before the COT ending position and not receiving a PDSCH that is located after the COT ending position, and the second manner corresponds to after the user device detects the control indication information which includes the COT ending position, receiving the PDSCH that is located before the COT ending position and also receiving the PDSCH that is located after the COT ending position; monitoring and receiving downlink control information; and receiving a PDSCH in the PDSCH receiving manner.