Sidelink Power Control for V2X Resource Conflict Prevention
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Solution Overview
Problem
In Vehicle to Everything (V2X) systems, transmission conflicts arise due to improper power control in unicast and multicast modes, leading to interference with broadcast transmissions.
Innovation Solution
Implement power control methods and apparatuses that utilize power control configuration information to determine whether to perform power control, and set RSRP thresholds to identify available transmission resources, ensuring terminals in the same resource pool use maximum sending power without power control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If power control is performed in unicast or multicast transmission mode, then energy saving is achieved, but transmission conflicts occur with broadcast transmissions
Solution Approach 1:
The patent changes the power control parameter from dynamic adjustment to fixed maximum power by configuring the power control adjustment state to indicate that power control shall not be performed. This allows unicast and multicast transmissions to use maximum sending power consistently, preventing transmission conflicts with broadcast transmissions while maintaining energy efficiency through optimized resource allocation.
2Reliability
If maximum sending power is used in broadcast transmission mode, then more receiver terminals can receive data, but interference occurs with unicast and multicast transmissions
Solution Approach 1:
The patent applies parameter changes by disabling power control adjustment for all transmission modes through configuration information. This standardizes the sending power across broadcast, unicast, and multicast transmissions, eliminating the interference problem caused by power mismatches while ensuring all terminals can receive data reliably.
3Reliability
If power control is disabled to prevent transmission conflicts, then transmission reliability improves, but energy efficiency decreases
Solution Approach 1:
The patent implements preliminary action by pre-configuring the power control adjustment state through higher-layer signaling before transmission occurs. This allows terminals to be instructed in advance whether to perform power control or use maximum power, enabling the network to optimize energy efficiency while preventing transmission conflicts through proactive configuration rather than reactive adjustment.
Solution Approach 2:
The patent uses feedback mechanisms through higher-layer configuration signaling to inform terminals about the power control adjustment state. This feedback loop allows the network to convey power control policies to terminals, enabling them to adjust their transmission behavior accordingly, thus achieving both transmission reliability and energy efficiency through coordinated control.
Data Source
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.