HARQ Feedback Generation for Multi-BWP Communication Systems
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Solution Overview
Problem
The evolution of communication systems, particularly with the introduction of bandwidth parts (BWP), necessitates an update in the retransmission mechanism for hybrid automatic repeat request (HARQ) feedback information, especially when multiple active BWPs are configured within a serving cell, either on the same or different carriers.
Innovation Solution
A method and apparatus for generating HARQ information that considers a BWP combination, where multiple active BWPs are treated as a unified entity, with the terminal device determining HARQ information based on parameters corresponding to the BWP combination, including the physical downlink shared channel (PDSCH) receiving occasion set, to facilitate efficient retransmissions across multiple BWPs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple active bandwidth parts (BWP) are configured within a serving cell, then the system can support flexible bandwidth allocation and carrier aggregation, but the complexity of generating HARQ feedback information increases due to the need to coordinate retransmissions across multiple BWPs
Solution Approach 1:
The patent segments the HARQ feedback generation process by treating each active BWP as an independent unit with its own parameters (such as PDSCH receiving occasion set). The terminal device generates HARQ information for each BWP separately based on its specific parameters, then combines these individual HARQ feedbacks into the overall feedback. This segmentation approach maintains flexibility in bandwidth allocation while managing complexity through modular processing.
2Device complexity
If multiple active BWPs are treated as a unified entity with unified parameters, then the HARQ information generation process is simplified, but the ability to optimize retransmissions for each specific BWP may be reduced
Solution Approach 1:
The patent applies local quality by allowing each active BWP to have its own specific parameters (such as PDSCH receiving occasion set, timing parameters) while using a unified approach to generate HARQ feedback. The terminal device determines HARQ information for each BWP based on that BWP's specific parameters, ensuring optimized retransmission control for each BWP while maintaining overall system simplicity through the unified feedback generation mechanism.
3Reliability
If the terminal device determines HARQ information based on parameters corresponding to each BWP combination, then retransmission reliability is improved, but the processing time and computational resources required increase
Solution Approach 1:
The patent applies preliminary action by pre-configuring the terminal device with the necessary parameters for each active BWP (such as PDSCH receiving occasion sets, timing parameters) before data transmission occurs. The terminal device stores these pre-determined parameters and uses them during HARQ feedback generation, eliminating the need for real-time calculation and reducing processing time while maintaining reliable retransmission control.
Data Source
AI summary
This application provides a method for generating hybrid automatic repeat request HARQ information and an apparatus. The method includes: A terminal device receives a first message sent by a network device. The first message is used to indicate that there is a bandwidth part BWP combination in a cell, the BWP combination includes an active BWP, and the BWP corresponds to a set of unified parameters. The terminal device generates HARQ information based on the unified parameters corresponding to the BWP combination. This application provides a method for generating HARQ information when there are a plurality of active BWPs.