UE Codebook Determination via Wake-Up Signal Timing
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Solution Overview
Problem
In communication technology, the existing codebook determination methods for user equipment (UE) result in large codebooks and increased overheads due to forming HARQ-ACK codebooks for every timing at which the physical downlink shared channel (PDSCH) is transmittable, regardless of whether data is received, leading to inefficient energy usage and increased processing requirements.
Innovation Solution
The proposed method involves determining the timing of PDSCH data receivability by the UE based on wake-up signals and configuring interval k1 or k0 value sets to selectively form HARQ-ACK codebooks only for receivable timings, reducing the size of the codebook and optimizing energy usage by aligning codebook formation with actual data reception times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE forms a HARQ-ACK codebook for every timing at which PDSCH is transmittable, then the codebook covers all possible reception timings, but the codebook size increases and overheads are increased
Solution Approach 1:
The patent extracts only the necessary codebook entries corresponding to actual PDSCH reception timings rather than including all possible timings. By removing redundant codebook elements for timings when no PDSCH is received, the codebook size is reduced while maintaining coverage for actual data reception events.
Solution Approach 2:
Instead of forming codebooks for all possible PDSCH timings (excessive action), the patent applies partial action by forming codebooks only for timings when PDSCH is actually received. This selective approach reduces codebook overhead while ensuring adequate coverage for actual communication needs.
2Reliability
If the UE forms a HARQ-ACK codebook for every timing at which PDSCH is transmittable, then all possible timings are covered, but energy consumption increases due to unnecessary processing
Solution Approach 1:
The patent removes unnecessary codebook formation operations for timings when no PDSCH is received. By extracting only the essential codebook formation tasks corresponding to actual data reception events, the UE avoids wasteful processing and reduces energy consumption while maintaining reliable communication coverage.
Solution Approach 2:
The patent applies partial action by performing codebook formation only when necessary (when PDSCH is actually received) rather than continuously for all possible timings. This selective processing approach significantly reduces UE energy consumption while ensuring adequate codebook coverage for actual communication needs.
3Use of energy by moving object
If the UE operates in sleep state to save energy, then energy efficiency is improved, but the UE cannot receive PDSCH data until awakened
Solution Approach 1:
The patent applies preliminary action through the WUS mechanism, which provides advance notification to the UE before actual PDSCH data transmission. This allows the UE to maintain sleep state until the wake-up signal is received, then activate only when needed, optimizing the balance between energy saving and data reception capability.
Solution Approach 2:
The patent implements periodic action through the WUS signaling mechanism that periodically awakens the UE from sleep state. This periodic wake-up approach allows the UE to efficiently balance between maintaining low power consumption during sleep periods and being available for data reception when the base station has data to transmit.
Data Source
AI summary
Provided are a codebook determination method, a codebook determination apparatus, a terminal, a base station and a storage medium. The codebook determination method includes that a UE determines, based on a timing of being awakened, a timing at which physical downlink shared channel (PDSCH) data is receivable by the UE; and the UE forms a corresponding Hybrid Automatic Repeat reQuest-Acknowledgement (HARQ-ACK) codebook based on the timing at which the PDSCH data is receivable. Further provided are a codebook determination apparatus, a terminal, a base station and a storage medium.