Sidelink Group Power Control for High-Rate, Low-Interference Communications
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Solution Overview
Problem
Existing wireless communication systems, particularly in the context of 5G and V2X technologies, face challenges in efficiently managing sidelink group communications, especially in terms of transmit power control, which affects data transfer rates, latency, and connectivity for vehicles and pedestrians.
Innovation Solution
Implementing sidelink group management for transmit power controlled group communications, which includes mechanisms for UEs to dynamically adjust transmit power based on network conditions and group communication needs, optimizing power usage and reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If transmit power is increased to improve data transfer rates and connectivity, then data transfer rates and connectivity are improved, but interference to other communications increases
Solution Approach 1:
The patent implements transmit power control where different UEs in the sidelink group use different transmit power levels based on their specific channel conditions, distances to the group leader, and interference environments. This localized power adjustment allows each UE to transmit at the minimum necessary power to maintain connectivity, thereby improving overall data transfer rates while minimizing interference to other communications.
Solution Approach 2:
The patent dynamically adjusts the transmit power parameter based on channel quality indicators, signal-to-interference-plus-noise ratio (SINR), and group communication requirements. By continuously monitoring and adapting the transmit power parameter, the system achieves optimal data transfer rates while keeping interference levels acceptable.
2Object-generated harmful factors
If transmit power is controlled to reduce interference, then interference is minimized, but data transfer rates and connectivity may deteriorate
Solution Approach 1:
The patent implements a feedback mechanism where UEs report channel quality metrics and reception status to the group leader. Based on this feedback, the group leader adjusts transmit power control parameters to maintain reliable connectivity and adequate data transfer rates while minimizing interference. The feedback loop ensures that power reduction does not compromise communication quality.
Solution Approach 2:
The transmit power control mechanism is dynamic rather than static, allowing continuous adjustment of power levels based on changing channel conditions, group member positions, and traffic requirements. This dynamic adaptation ensures that data transfer rates remain sufficient even when power is controlled to reduce interference.
3Loss of energy
If group management mechanisms are implemented for power control, then power usage is optimized and interference is reduced, but system complexity increases
Solution Approach 1:
The patent integrates transmit power control functionality into the existing sidelink group management framework, allowing the same signaling and control mechanisms to serve multiple purposes: group member identification, channel quality reporting, and power control parameter distribution. This multi-functionality reduces the need for separate dedicated power control infrastructure, thereby limiting the increase in system complexity.
Solution Approach 2:
Each UE in the sidelink group autonomously determines its transmit power level based on received power control parameters and local channel conditions, without requiring centralized real-time control from the group leader. This self-service approach distributes the computational burden and reduces signaling overhead, optimizing power usage while limiting system complexity.
Data Source
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AI summary
Disclosed are techniques for wireless communication. In an aspect, a user equipment (UE) participating in a sidelink communications group communicates with one or more member UEs of the sidelink communications group, and transmits group presence announcement messages for the sidelink communications group based on a determination, based on communicating with the one or more member UEs, of at least a transmit power for the group presence announcement messages and that the UE is expected to transmit the group presence announcement messages for the sidelink communications group.