V2X Sidelink Transmitting Power Determination Using Comprehensive Path Loss
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Solution Overview
Problem
In New Radio (NR) vehicle-to-everything (V2X) sidelink communication, the existing power control schemes often result in transmitting power being too low, leading to substantial degradation of sidelink communication quality and decreased throughput, especially when the sidelink transmitting UE is far from the receiving UE but close to a base station.
Innovation Solution
A method to determine transmitting power by calculating a comprehensive path loss using sidelink and uplink path losses, along with adjustment factors, to compensate for both losses and optimize power control, thereby improving sidelink communication quality and throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal is close to the base station resulting in small uplink path loss, then the uplink communication efficiency is improved, but the sidelink transmitting power becomes too low leading to degradation of sidelink communication quality
Solution Approach 1:
The patent introduces multiple adjustment factors (first adjustment factor for sidelink path loss, second adjustment factor for uplink path loss, third adjustment factor for transmitting power) to dynamically adjust the path loss compensation parameters. These parameters are changed based on different communication scenarios to achieve appropriate transmitting power levels.
Solution Approach 2:
The patent makes the power control scheme dynamic by using adjustable parameters instead of fixed compensation ratios. The network can configure different adjustment factors according to actual channel conditions, allowing the system to adapt to varying scenarios such as when the terminal is close to the base station or far from the sidelink receiving terminal.
2Device complexity
If the terminal uses minimum value of sidelink path loss and uplink path loss for comprehensive path loss, then the calculation complexity is reduced, but the transmitting power determination accuracy deteriorates
Solution Approach 1:
The patent enhances the accuracy of path loss compensation by introducing multiple configurable adjustment factors (a, b, c) that can be tuned to match different propagation scenarios. Instead of using a fixed minimum value approach, the system allows flexible parameter adjustment to achieve more accurate transmitting power determination.
Solution Approach 2:
The network configures the adjustment factors in advance based on expected communication scenarios. This preliminary configuration allows the terminal to perform accurate power control calculations without real-time complex measurements, balancing accuracy and complexity.
Data Source
AI summary
This disclosure provides a transmitting power determination method and apparatus, and a communication device. The transmitting power determination method includes: determining a comprehensive path loss according to a sidelink path loss of a first device, an uplink path loss of the first device, a first adjustment factor corresponding to the sidelink path loss and a second adjustment factor corresponding to the uplink path loss; determining transmitting power of the first device according to a third adjustment factor and the comprehensive path loss.