Sidelink Channel Multiplexing for PSSCH Data and HARQ Feedback
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently multiplexing physical sidelink shared channels (PSSCH) with physical sidelink feedback channels (PSFCH) for hybrid automatic repeat request (HARQ) feedback, leading to inefficiencies in device-to-device communication.
Innovation Solution
The method involves multiplexing a second PSSCH message with a PSFCH that carries HARQ feedback, enabling simultaneous transmission and reception of data and feedback in wireless communication systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If separate channels are used for PSSCH and PSFCH transmissions, then channel reliability is maintained, but resource utilization efficiency deteriorates
Solution Approach 1:
The patent applies channel multiplexing to combine PSSCH and PSFCH transmissions into a single physical channel. The UE multiplexes the second PSSCH message with the PSFCH carrying HARQ feedback for the first PSSCH message, allowing both data transmission and feedback to share the same physical resources simultaneously, thereby improving resource utilization efficiency while maintaining reliability through proper signal separation and processing
2Productivity
If PSFCH is multiplexed with PSSCH, then resource utilization efficiency improves, but signal detection complexity increases
Solution Approach 1:
The patent applies signal segmentation to separate the PSSCH and PSFCH signals within the multiplexed physical channel. The UE receives the multiplexed signal, identifies and separates the PSFCH component carrying HARQ feedback from the PSSCH data component, and processes them independently. This segmentation enables efficient resource utilization while managing detection complexity through systematic signal separation based on known channel characteristics and signal properties
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a first physical sidelink shared channel (PSSCH) message. The UE may transmit a second PSSCH message, wherein the second PSSCH message is multiplexed with a physical sidelink feedback channel (PSFCH) that carries hybrid automatic repeat request (HARQ) feedback for the first PSSCH message. Numerous other aspects are described.