Inter-UE Transmit Power Adjustment for Sidelink Resource Conflicts
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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 these resources, thereby improving resource utilization.
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 applies parameter changes by modifying the transmit power level as a variable parameter to resolve resource conflicts. Instead of binary transmission suppression, the system adjusts power levels dynamically. When a UE identifies non-preferred or conflicting resources through IUC messages, it transmits at a reduced power level rather than completely suppressing the transmission, thereby maintaining resource utilization while managing interference through power parameter adjustment
2Reliability
If UEs transmit at full power on conflicting resources, then transmission reliability is maintained, but interference to other UEs increases
Solution Approach 1:
The patent implements dynamics by making transmit power adjustable and adaptive rather than fixed at maximum level. Through IUC mechanisms, UEs dynamically adjust their transmit power based on real-time coordination information. When conflicts are detected, the system dynamically reduces power levels, creating a flexible transmission strategy that balances reliability and interference management
3Object-affected harmful factors
If UEs completely avoid non-preferred resources, then interference is minimized, but available transmission opportunities decrease
Solution Approach 1:
The patent applies partial action by implementing selective transmission strategies. Instead of completely avoiding non-preferred resources, UEs perform partial transmissions at reduced power levels. This partial action approach allows UEs to utilize otherwise unavailable resources while maintaining acceptable interference levels, thereby increasing transmission flexibility and available opportunities
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.