SPS HARQ-ACK Feedback Timing for Multiple Configurations on One BWP
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Solution Overview
Problem
Existing NR systems face challenges in simultaneously activating multiple semi-persistent scheduling (SPS) configurations on a single bandwidth part (BWP) of a serving cell, leading to potential delays in HARQ-ACK information transmission and increased latency.
Innovation Solution
A signal transmission method and apparatus that allow at least two SPS configurations to be activated simultaneously on the same BWP, enabling their corresponding HARQ-ACK information to be fed back within the same time unit, thereby improving network flexibility and reducing latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple SPS configurations are activated simultaneously on one BWP, then network flexibility is improved, but HARQ-ACK transmission timing becomes uncertain and may cause delays
Solution Approach 1:
The patent segments HARQ-ACK information into separate feedback messages for different SPS configurations. When multiple SPS configurations are activated simultaneously, each configuration's HARQ-ACK is transmitted in separate time units rather than attempting to combine them, thus avoiding timing conflicts while maintaining network flexibility
Solution Approach 2:
The patent implements dynamic selection of HARQ-ACK transmission timing based on the specific configuration and timing requirements of each SPS configuration. The system dynamically determines which time unit to use for transmitting HARQ-ACK information for each SPS configuration, adapting to different service requirements and minimizing delays
2Adaptability or versatility
If multiple SPS configurations are activated simultaneously on one BWP, then service model adaptability is improved, but existing techniques cannot handle the HARQ-ACK feedback
Solution Approach 1:
The patent divides HARQ-ACK feedback into separate messages for each SPS configuration when multiple configurations are active simultaneously. This segmentation ensures that each feedback message can be reliably processed independently, maintaining feedback reliability while supporting multiple service models
Solution Approach 2:
The patent introduces an intermediary mechanism that manages the timing and content of HARQ-ACK feedback for multiple SPS configurations. This intermediary layer coordinates the feedback transmission to ensure reliability while accommodating different service model requirements
3Speed
If SPS period is shortened to meet new service demands, then service responsiveness is improved, but HARQ-ACK information may overlap in the same time unit
Solution Approach 1:
The patent employs dynamic timing adjustment for HARQ-ACK feedback based on the shortened SPS period. When SPS period is reduced to improve responsiveness, the system dynamically selects appropriate time units for HARQ-ACK transmission to avoid overlaps, managing the increased timing coordination complexity through adaptive algorithms
Solution Approach 2:
The patent implements periodic HARQ-ACK feedback transmission synchronized with the shortened SPS period. By establishing regular feedback intervals that align with the accelerated service cycle, the system maintains responsiveness while preventing timing overlaps through structured periodic actions
Data Source
AI summary
A signal transmission apparatus, configured in a terminal equipment, wherein the apparatus includes a generator configured to generate a first feedback signal at least according to a first set, the first set at least comprising two SPS PDSCH receptions, and the SPS PDSCH receptions in the first set corresponding to identical bandwidth parts (BWPs) or component carriers or serving cells or identical BWPs of identical serving cells, and a transmitter configured to transmit the first feedback signal.