HARQ Codebook Generation for 5G PDSCH and PDCCH Timing
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Solution Overview
Problem
The existing communication systems face challenges in effectively feeding back Hybrid Automatic Repeat Request (HARQ) information, which is crucial for ensuring reliable and efficient data transmission in 5G communications systems.
Innovation Solution
The proposed solution involves determining the quantity of Physical Downlink Shared Channels (PDSCHs) and Physical Downlink Control Channels (PDCCHs) based on configured timing values and resource allocation tables, allowing for the generation of an optimized HARQ codebook that effectively feeds back decoding results from the receive end to the transmit end, using a combination of semi-static and dynamic codebook methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If HARQ feedback is implemented in 5G communications system, then transmission reliability is improved, but processing time and system complexity increase
Solution Approach 1:
The patent segments the HARQ feedback process into distinct phases: determining PDSCH/PDCCH quantities based on timing values, generating HARQ codebooks using semi-static and dynamic methods, and feeding back decoding results. This segmentation allows each component to be optimized independently, reducing overall system complexity while maintaining reliability
Solution Approach 2:
The patent implements dynamic HARQ codebook generation that adapts to varying channel conditions and traffic patterns. The system dynamically adjusts the quantity of PDSCHs and PDCCHs based on configured timing values, enabling flexible resource allocation that reduces processing overhead while ensuring reliable transmission
2Measurement precision
If HARQ codebook generation uses dynamic methods, then feedback accuracy is improved, but computational overhead increases
Solution Approach 1:
The patent merges semi-static and dynamic codebook generation methods into a unified HARQ feedback mechanism. The semi-static component provides a baseline structure that reduces computational overhead, while the dynamic component enhances feedback accuracy by adapting to current channel conditions. This combination achieves both accuracy and efficiency
Solution Approach 2:
The patent changes key parameters such as the quantity of PDSCHs and PDCCHs based on configured timing values and resource allocation tables. By dynamically adjusting these parameters, the system optimizes the balance between feedback accuracy and computational overhead, ensuring high precision without excessive processing requirements
3Adaptability or versatility
If timing values are configured by higher layer signaling, then scheduling flexibility is improved, but signaling overhead increases
Solution Approach 1:
The patent makes timing values configurable through higher layer signaling, allowing the same HARQ feedback mechanism to serve multiple scheduling scenarios and traffic types. This universal approach enables the system to adapt to different service requirements (e.g., eMBB, URLLC) without requiring separate feedback protocols, thereby reducing overall signaling overhead while maintaining flexibility
Data Source
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AI summary
Embodiments of this application provide a communication method and a device, and relate to the field of communication technologies, to ensure effective transmission of HARQ. A specific solution is as follows: determining, by a communications device, a quantity of physical downlink shared channels PDSCHs based on a value set of K1 and a time domain resource allocation table; determining, by the communications device, a quantity of PDCCHs based on the value set of K1, a value of K0 in the time domain resource allocation table, a physical downlink control channel PDCCH period, a PDCCH monitor offset, and a PDCCH monitor pattern; and determining, by the communications device, a HARQ codebook based on the quantity of PDSCHs and the quantity of PDCCHs.