Type 3 HARQ Codebook for Sidelink Feedback
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Solution Overview
Problem
Current wireless communication systems, particularly in LTE and NR, face inefficiencies in sidelink hybrid automatic repeat request (HARQ) feedback mechanisms, leading to wastage of power and resources due to inefficient designs for sidelink HARQ feedback on physical sidelink feedback channels.
Innovation Solution
Implementing a type 3 hybrid automatic repeat request (HARQ) codebook for sidelink communications, where user equipment (UE) receives sidelink control information to transmit or receive HARQ feedback in a type 3 codebook on a physical sidelink channel, optimizing resource usage by multiplexing feedback and reducing unnecessary signaling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If traditional sidelink HARQ feedback mechanisms are used, then feedback can be transmitted on physical sidelink feedback channels, but power and resources are wasted due to inefficient design and unnecessary signaling
Solution Approach 1:
The patent changes the feedback transmission parameter from traditional separate HARQ feedback to bundled ACK/NACK feedback, where multiple HARQ acknowledgments are combined into a single feedback message. This parameter change reduces the number of feedback transmissions and associated signaling overhead, thereby reducing power consumption while maintaining reliability
Solution Approach 2:
The patent merges multiple HARQ feedback messages into a single bundled ACK/NACK feedback transmission. By combining multiple individual feedback signals into one consolidated message, the system reduces the total number of transmissions required, eliminating redundant signaling and reducing power consumption without sacrificing the ability to acknowledge multiple data packets
2Productivity
If traditional sidelink HARQ feedback mechanisms are used, then feedback can be transmitted, but processing resources are wasted due to inefficient designs
Solution Approach 1:
The patent combines multiple HARQ feedback processes into a single bundled ACK/NACK message, reducing the total quantity of feedback signaling required. This merging approach decreases processing resources needed for generating, transmitting, and managing individual feedback messages while maintaining the ability to acknowledge multiple data packets efficiently
Solution Approach 2:
The bundled ACK/NACK feedback mechanism serves multiple functions simultaneously: it acknowledges multiple HARQ processes, reduces signaling overhead, and improves resource efficiency. This multi-functional approach allows the system to achieve better productivity by using processing resources more effectively across multiple feedback operations
3Productivity
If traditional sidelink HARQ feedback mechanisms are used, then feedback signaling can be transmitted, but unnecessary signaling occurs leading to reduced efficiency
Solution Approach 1:
The patent merges multiple individual HARQ feedback signals into a single bundled ACK/NACK message, eliminating redundant signaling. By combining feedback for multiple HARQ processes into one transmission, the system reduces signaling overhead and improves overall communication efficiency without losing any essential acknowledgment information
Solution Approach 2:
The patent extracts the essential feedback information from multiple individual HARQ messages and consolidates it into a single bundled ACK/NACK transmission. This extraction approach removes unnecessary redundant signaling while preserving the core acknowledgment functionality, thereby reducing signaling overhead and improving productivity
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive sidelink control information (SCI) indicating that the UE is to transmit sidelink hybrid automatic repeat request (HARQ) feedback in a type 3 codebook. The UE may transmit the type 3 codebook on a physical sidelink channel for one or more sidelink HARQ processes based at least in part on the SCI. Numerous other aspects are provided.