Sidelink Feedback Timing Capability Determination
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G technology, face challenges in determining and optimizing the feedback timing capability for sidelink communications, which affects resource allocation and communication efficiency.
Innovation Solution
A method is introduced where a transmitter user equipment (UE) determines the feedback forwarding timing capability based on the timing for receiving and processing feedback from a receiver UE, and then receives an uplink resource grant from an access point to facilitate the transmission of feedback for sidelink or downlink communications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If feedback timing capability is not determined in sidelink communications, then resource allocation can be simplified, but communication reliability and efficiency deteriorate due to inadequate feedback scheduling
Solution Approach 1:
The transmitter UE determines the feedback forwarding timing capability in advance by calculating the first timing (time to receive and process feedback from receiver UE) and the second timing (time to forward feedback to access point). This preliminary determination allows the access point to allocate appropriate uplink resources for feedback transmission, ensuring reliable sidelink communications without adding complex real-time scheduling mechanisms.
2Productivity
If feedback timing capability is accurately determined and reported, then resource allocation efficiency improves, but device complexity and signaling overhead increase
Solution Approach 1:
The transmitter UE reports the determined feedback forwarding timing capability to the access point. This feedback mechanism enables the access point to make informed resource allocation decisions for both sidelink and downlink communications, improving overall system productivity while distributing the computational burden to the UE rather than centralizing it in the access point.
Solution Approach 2:
The transmitter UE autonomously determines its own feedback forwarding timing capability by calculating the required timings for receiving, processing, and forwarding feedback. This self-service approach reduces the need for complex network-controlled timing management and minimizes signaling overhead while maintaining efficient resource allocation.
3Reliability
If uplink resources are allocated based on feedback timing capability, then feedback transmission reliability improves, but resource allocation complexity increases
Solution Approach 1:
The access point uses the reported feedback forwarding timing capability parameter to dynamically adjust uplink resource allocation. By changing the allocation parameters based on the UE's actual timing requirements, the system ensures reliable feedback transmission while maintaining flexible and efficient resource management without requiring complex scheduling algorithms.
Data Source
AI summary
Some aspects described herein relate to determining, by a transmitter user equipment (UE) in sidelink communications with a receiver UE, a feedback forwarding timing capability based at least in part on a first timing for receiving and processing feedback from the receiver UE, and receiving, from an access point and based on the feedback forwarding timing capability, at least an uplink resource grant for transmitting feedback for at least one of sidelink communications or downlink communications. Other aspects relate to determining, by a transmitter UE in sidelink communications with a receiver UE, a timing capability for the receiver UE to at least one of receive sidelink communications from the transmitter UE or report feedback for the sidelink communications to the transmitter UE.