Sidelink Resource Indication Using SIR-Based UE Scheduling
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing sidelink resources for direct UE-to-UE communications, particularly in selecting and scheduling resources based on signal-to-interference ratios to optimize transmission quality.
Innovation Solution
User Equipment (UE) selects and schedules sidelink resources by sensing available resources and determining signal-to-interference ratios to identify preferred resources for transmission, and communicates these selections to other UEs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UE performs sensing and selects candidate sidelink resources based on signal-to-interference ratios, then transmission quality is improved, but device complexity and processing overhead increase
Solution Approach 1:
The receiving UE performs sensing and identifies candidate sidelink resources in advance before the actual transmission occurs. By pre-selecting resources with favorable signal-to-interference ratios and communicating these selections to the transmitting UE, the system improves transmission quality while reducing real-time decision complexity.
Solution Approach 2:
The receiving UE autonomously performs the complex sensing and resource selection operations without requiring continuous network control. By taking self-service in identifying and recommending optimal resources based on local channel conditions, the receiving UE reduces overall system processing overhead while maintaining high transmission quality.
2Productivity
If UE schedules sidelink resources based on signal-to-interference ratios, then resource allocation efficiency is improved, but loss of time for resource selection increases
Solution Approach 1:
Resource selection and evaluation based on signal-to-interference ratios is performed in advance during sensing periods rather than at the moment of transmission. This preliminary action allows the system to pre-identify optimal resources, improving allocation efficiency while the selected resources can be used immediately when needed.
Solution Approach 2:
The sensing and resource selection process operates periodically at defined intervals rather than continuously. This periodic operation maintains efficient resource allocation by regularly updating resource selections based on current channel conditions, while avoiding excessive processing time by not requiring continuous evaluation.
3Reliability
If UE transmits indications of candidate and scheduled sidelink resources to other UEs, then coordination and transmission quality are improved, but use of energy and signaling overhead increase
Solution Approach 1:
Resource indication is transmitted selectively rather than universally. The receiving UE sends candidate and scheduled resource indications primarily to relevant transmitting UEs that have actual data transmission needs, rather than broadcasting to all UEs. This localized approach improves coordination quality for actual transmissions while reducing unnecessary signaling energy consumption.
Solution Approach 2:
The system transmits only the necessary subset of resource information (candidate and scheduled resource indications) rather than complete channel state information. This partial action provides sufficient coordination quality for resource selection while minimizing signaling overhead and energy consumption compared to full information exchange.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first user equipment (UE) may select one or more candidate sidelink resources, from within a resource selection window after sensing a sidelink channel, that are available for a second UE to use for transmission to the first UE. The UE may schedule, from among the candidate sidelink resources based at least in part on signal-to-interference ratios for the candidate sidelink resources, one or more scheduled sidelink resources that are preferred for transmission to the first UE. The UE may transmit, to the second UE, an indication of the candidate sidelink resources and the one or more scheduled sidelink resources. Numerous other aspects are described.