Sidelink Power Coordination on Conflicting UE Resources
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently utilizing non-preferred and conflicting sidelink resources due to interference and collisions, necessitating improved inter-user equipment coordination (IUC) techniques.
Innovation Solution
Implementing transmit power adjustment based on IUC, where a first UE identifies non-preferred or conflicting resources and transmits an indication of power reduction to a second UE, allowing the second UE to transmit with reduced power on those resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UEs suppress transmissions on non-preferred or conflicting resources to avoid interference, then interference and collisions are reduced, but resource utilization deteriorates
Solution Approach 1:
The patent changes the transmission parameter (power level) based on resource preference. Instead of binary suppression, the system applies different power reduction levels (e.g., first power reduction level for non-preferred resources, second power reduction level for conflicting resources) to enable transmissions on previously avoided resources while managing interference.
Solution Approach 2:
The patent introduces dynamic power adjustment where the transmit power is not fixed but adapts based on resource conflict status. The base station dynamically determines power reduction levels based on IUC messages and resource reservation information, making the transmission system more flexible and efficient.
2Productivity
If UEs transmit on conflicting resources without coordination, then resource utilization improves, but interference and collisions increase
Solution Approach 1:
The patent implements a feedback mechanism where the base station receives IUC messages from UEs indicating resource conflicts, processes this information, and returns power reduction instructions. This closed-loop feedback enables the system to manage interference while maintaining resource utilization efficiency.
Solution Approach 2:
The base station acts as an intermediary that coordinates between UEs with conflicting resource reservations. It receives reservation information from multiple UEs, determines conflicts, and mediates by assigning appropriate power reduction levels to resolve interference issues.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. In one aspect, a first user equipment (UE) may transmit an indication of non-preferred resources to a second UE and an indication of an amount of transmit power reduction for the second UE to observe for a sidelink transmission on the non-preferred resources. In another aspect, a first UE may transmit an indication of an amount of transmit power reduction for a second UE to observe for a sidelink transmission on conflicting resources (e.g., resources reserved by the second UE and a third UE). Because the second UE may transmit on the non-preferred resources or the conflicting resources with reduced power (e.g., rather than suppressing transmissions on the non-preferred resources or the conflicting resources), the utilization of the non-preferred resources or the conflicting resources may be improved.