Dynamic HARQ-ACK Bundling for Wireless Signal Transmission
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in transmitting and receiving HARQ-ACK information, particularly in scenarios with multiple transport blocks, where existing methods do not effectively manage bundling and structure application based on varying conditions.
Innovation Solution
A method and apparatus for determining whether to apply HARQ-ACK bundling in a wireless communication system, where the decision is based on specific conditions such as the reception pattern of transport blocks, their number, and overlapping transmission time intervals, allowing for efficient transmission of HARQ-ACK information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If HARQ-ACK bundling is applied to all transport blocks, then the overhead of HARQ-ACK information is reduced, but the reliability of individual TB acknowledgment is degraded
Solution Approach 1:
The patent applies dynamic HARQ-ACK bundling where the bundling operation is selectively applied based on the reception status of transport blocks. When a TB is successfully received, its HARQ-ACK is bundled with others to reduce overhead; when a TB is not successfully received, individual HARQ-ACK is maintained to ensure reliability. This dynamic adaptation resolves the contradiction between overhead reduction and reliability preservation.
Solution Approach 2:
The patent implements different HARQ-ACK treatment for different transport blocks based on their individual reception conditions. Successfully received TBs undergo bundling (local optimization for overhead reduction), while unsuccessfully received TBs maintain individual acknowledgment (local optimization for reliability). This local differentiation resolves the contradiction by applying different strategies to different parts of the system.
2Reliability
If individual HARQ-ACK responses are transmitted for each transport block, then the reliability of acknowledgment is improved, but the signaling overhead increases
Solution Approach 1:
The system dynamically adjusts between individual HARQ-ACK transmission and bundled HARQ-ACK transmission based on the reception status of each transport block. When TBs are successfully received, bundling is applied to reduce overhead; when TBs are not successfully received, individual transmission is used to maintain reliability. This dynamic switching resolves the contradiction between reliability and overhead.
Solution Approach 2:
The patent changes the parameter of HARQ-ACK representation from fixed individual responses to conditional bundled or individual responses based on reception status. This parameter change allows the system to adapt the acknowledgment format to the actual transmission conditions, resolving the contradiction between reliability and signaling overhead.
3Device complexity
If HARQ-ACK bundling structure is fixed, then the device complexity is reduced, but the adaptability to different transmission scenarios is degraded
Solution Approach 1:
The patent introduces dynamic selection of HARQ-ACK bundling based on the reception status of transport blocks. The system evaluates whether each TB was successfully received and dynamically determines whether to apply bundling or individual acknowledgment. This dynamic approach maintains relatively simple processing logic while significantly improving adaptability to different transmission scenarios.
Solution Approach 2:
The system automatically determines the appropriate HARQ-ACK transmission mode based on its own reception status without requiring complex external coordination. The terminal itself decides whether to apply bundling or individual acknowledgment based on whether it successfully received each TB, simplifying the overall system complexity while maintaining high adaptability.
Data Source
AI summary
The present invention relates to a wireless communication system and, more specifically, to a method and an apparatus therefor, the method comprising the steps of: receiving information for scheduling a plurality of transport blocks (TBs); receiving the plurality of TBs on the basis of the information; and transmitting HARQ-ACK information relating to the plurality of TBs, wherein whether HARQ-ACK bundling is applied and/or a structure in which HARQ-ACK bundling is applied is determined on the basis of a specific condition. The UE is capable of communicating with at least one of another UE, a UE related to an autonomous driving vehicle, a base station or a network.