Joint Acknowledgment Feedback Multiplexing in Sidelink Wireless
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing acknowledgment feedback for sidelink communications, particularly in scenarios where downlink and sidelink acknowledgment feedback resources collide, leading to increased latency and signaling overhead.
Innovation Solution
The implementation of a technique where user equipment (UE) transmits joint acknowledgment feedback for both downlink and sidelink communications using the same uplink resources, allowing for efficient multiplexing and reduced collisions, thereby enabling timely resource allocation for retransmissions and minimizing signaling overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate uplink resources are allocated for downlink and sidelink acknowledgment feedback, then feedback reliability is improved, but resource collision and signaling overhead increase
Solution Approach 1:
The patent combines downlink acknowledgment feedback and sidelink acknowledgment feedback into a single joint feedback message transmitted on the same uplink resource. This merging approach eliminates resource collisions between the two feedback types, reduces signaling overhead, and decreases latency while maintaining feedback reliability through unified transmission
2Reliability
If separate uplink resources are allocated for downlink and sidelink acknowledgment feedback, then feedback reliability is improved, but signaling overhead increases
Solution Approach 1:
The patent merges downlink and sidelink acknowledgment feedback into a single joint feedback message, reducing the number of separate signaling transmissions required. This approach decreases signaling overhead and network device complexity while maintaining the reliability of feedback delivery through unified resource allocation
3Productivity
If joint acknowledgment feedback is transmitted using the same uplink resources, then latency and signaling overhead are reduced, but feedback reliability may deteriorate
Solution Approach 1:
The patent creates a universal uplink feedback mechanism that handles both downlink and sidelink acknowledgment feedback through the same resource and message structure. This multi-functional approach improves throughput efficiency by eliminating resource collisions while maintaining reliability through a standardized, robust feedback transmission framework
Data Source
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AI summary
Methods, systems, and devices for wireless communications are described for providing acknowledgment feedback in sidelink communications. A sidelink transmitting UE may receive a resource grant for a sidelink communication with one or more other UEs and may transmit the sidelink communication in accordance with the grant. The transmitting UE may then monitor for acknowledgment feedback from the one or more other UEs and generate sidelink acknowledgment feedback. A joint communication that provides both downlink acknowledgment feedback and the sidelink acknowledgment feedback may be provided to a serving base station. The transmitting UE may also multiplex sidelink acknowledgment feedback for each of two or more other UEs in a communication to the serving base station. The serving base station may determine whether any resources for retransmissions are to be granted based on the acknowledgment feedback.