Sidelink Power Configuration for Unicast-Broadcast Conflict Avoidance
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Solution Overview
Problem
In the Vehicle to Everything (V2X) system, transmission conflicts occur due to improper power control in unicast and broadcast modes, leading to interference and resource preemption.
Innovation Solution
A power control method that configures terminals not to perform power control, allowing them to use maximum sending power, thereby avoiding conflicts by ensuring all terminals in a resource pool use the same power settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a terminal using unicast or multicast transmission mode performs power control to save energy, then energy efficiency is improved, but transmission conflicts occur when broadcast terminals preempt resources
Solution Approach 1:
The patent applies local quality by differentiating power control behavior based on transmission mode. Unicast and multicast terminals perform power control according to channel quality, while broadcast terminals use maximum power. This localized differentiation resolves the contradiction by allowing energy efficiency improvements in unicast/multicast without causing conflicts with broadcast transmissions.
Solution Approach 2:
The patent changes the power parameter dynamically based on transmission mode and channel conditions. Terminals adjust their sending power according to path loss measurements and transmission mode requirements, enabling unicast/multicast terminals to reduce power when appropriate while ensuring broadcast terminals maintain sufficient power for wide coverage, thus avoiding transmission conflicts.
2Area of stationary object
If a terminal uses maximum sending power for broadcast transmission to allow more receivers, then coverage is improved, but resource preemption and transmission conflicts occur
Solution Approach 1:
The patent applies local quality by assigning different power control strategies to different transmission modes. Broadcast terminals are specifically configured to use maximum sending power to ensure wide coverage, while unicast and multicast terminals use adaptive power control. This localized approach ensures broadcast coverage is maximized without causing conflicts, as other terminals can detect and avoid these high-power transmissions.
3Productivity
If all terminals in a resource pool use different power control strategies, then transmission modes are optimized, but resource coordination and conflict avoidance become complex
Solution Approach 1:
The patent segments the terminal population by transmission mode (broadcast, unicast, multicast) and assigns specific power control rules to each segment. This segmentation simplifies the overall system by providing clear, mode-specific guidelines rather than requiring complex coordination among all terminals. Each terminal only needs to follow the power control rules appropriate to its transmission mode, reducing overall system complexity.
Data Source
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AI summary
The present application relates to the technical field of communications, and disclosed are a power control method, a method and apparatus for determining transmission resources, a terminal, and a storage medium. The method comprises: acquiring power control configuration information; and according to the power control configuration information, determining whether to perform power control when sending sidelink data. The present application makes all terminals using the same resource pool not perform power control, thereby avoiding the problem in which when a terminal that employs a unicast transmission mode performs power control on a certain resource, a terminal that employs a broadcast transmission mode determines that the resource is available when listening, thereby preempting the resource and causing a transmission conflict.