Sidelink Feedback Reporting Resource Allocation
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Solution Overview
Problem
In wireless communication systems, user equipment (UE) faces challenges in efficiently managing and transmitting feedback data for downlink and sidelink communications, particularly when both types of feedback are pending, due to overlapping or non-overlapping resource sets and differing priorities.
Innovation Solution
The UE determines resource sets reserved for downlink and sidelink feedback, either transmits both in non-overlapping sets, drops lower priority feedback in overlapping sets, or multiplexes feedback when timing conditions are met, based on indications from the base station and internal prioritization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE transmits both downlink feedback and sidelink feedback in separate resource sets, then feedback transmission reliability is improved, but resource utilization efficiency deteriorates due to potential resource overlap and fragmentation
Solution Approach 1:
The patent segments feedback resources into dedicated resource sets for downlink feedback and sidelink feedback. The base station configures separate resource pools, and the UE identifies specific resources within these pools for different feedback types. This segmentation ensures that downlink feedback and sidelink feedback are transmitted in distinct resource allocations, preventing conflicts and ensuring reliable transmission of both feedback types simultaneously.
2Reliability
If the UE prioritizes downlink feedback transmission over sidelink feedback, then downlink communication reliability is improved, but sidelink communication performance deteriorates due to feedback drops
Solution Approach 1:
The patent implements dynamic priority handling where the UE determines priorities of different feedback types and adapts transmission decisions accordingly. When resources overlap, the UE can dynamically select which feedback to transmit based on configured priorities, allowing the system to flexibly handle different scenarios rather than using a fixed priority scheme.
Solution Approach 2:
The base station configures priority parameters for different feedback types through RRC signaling. The UE uses these configured priority values to make transmission decisions. By changing the priority parameter assignments, the system can optimize performance for different service requirements, balancing downlink and sidelink communication needs.
3Productivity
If the UE multiplexes both feedback types in the same resources, then resource utilization efficiency is improved, but feedback transmission complexity increases due to prioritization and selection requirements
Solution Approach 1:
The base station performs preliminary configuration by allocating dedicated resource sets for downlink and sidelink feedback before actual feedback transmission occurs. This advance resource allocation simplifies the UE's task during actual transmission, as the resource selection logic is predetermined by the configured resource pools and their associated priorities, reducing real-time decision complexity.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may determine that it has first feedback data for downlink communications and second feedback data for sidelink communications. The UE may receive from a base station an indication of resources for the feedback and transmit the first feedback data, the second feedback data, or both, in the resources. In some examples, the UE may transmit the first feedback data in a first set of the resources and transmit the second feedback data in a second set of the resources. In some examples, the UE may drop one of the first or second feedback data based on priorities associated with the feedback data. In some examples, the UE may multiplex the first and second feedback data for transmission in the resources.