Dynamic Power Control Parameter Grouping for D2D Range
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Solution Overview
Problem
Existing power control methods in D2D communication systems, such as open-loop and closed-loop power control, are not suitable for ensuring communication range, as they often result in low transmit power for long-range services and inadequate power adjustment, leading to suboptimal communication quality.
Innovation Solution
A power control method where user equipment (UE) receives a power control parameter set from the base station, determining a first power control parameter group to calculate transmit power suitable for the initiated service, ensuring the communication range through dynamic adjustment based on service requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If semi-static or static parameter configuration is used for power control, then power consumption is reduced and device complexity is lowered, but transmit power is insufficient for long-range communication services
Solution Approach 1:
The patent applies dynamics by transitioning from static/semi-static power control parameters to dynamic power control. The base station sends power control parameters dynamically, and the UE adjusts transmit power in real-time based on service requirements (long-range, middle-range, or short-range D2D communication), ensuring adequate transmit power for different communication ranges while maintaining system adaptability.
Solution Approach 2:
The patent implements parameter changes by modifying power control parameters (such as P0, alpha, path loss compensation) based on service types and communication ranges. The base station configures different parameter sets for different service scenarios, allowing the UE to adjust transmit power parameters dynamically to match service requirements, thereby resolving the contradiction between power sufficiency and control complexity.
2Length of moving object
If transmit power is increased to ensure long-range communication, then communication range is improved, but power consumption increases and may exceed maximum allowed power
Solution Approach 1:
The patent applies local quality by tailoring power control parameters to specific service requirements and communication ranges. Different parameter sets are configured for long-range, middle-range, and short-range D2D services. The UE selects appropriate parameters based on the current service type, ensuring that transmit power is optimized locally for each service scenario rather than using a uniform high-power configuration, thus achieving adequate communication range while minimizing unnecessary power consumption.
Solution Approach 2:
The patent uses dynamics to enable real-time adjustment of transmit power based on actual communication needs. The base station monitors service conditions and sends updated power control parameters to the UE, which dynamically adjusts transmit power to maintain adequate communication range only when necessary, avoiding sustained high-power transmission and reducing overall power consumption.
3Reliability
If power control parameters are adjusted dynamically to meet service requirements, then communication quality is improved, but device complexity and processing overhead increase
Solution Approach 1:
The patent implements feedback mechanisms where the base station monitors D2D communication conditions and sends power control parameter adjustments to the UE based on service requirements. The UE applies these parameters to adjust transmit power, and the base station continues to monitor and refine parameters, creating a closed-loop feedback system that improves communication quality while distributing processing complexity between the base station and UE.
Solution Approach 2:
The patent applies preliminary action by having the base station pre-configure multiple power control parameter sets corresponding to different service types and communication ranges before actual D2D communication begins. When a service is initiated, the UE can quickly select from pre-configured parameters rather than calculating optimal parameters in real-time, reducing processing complexity while still achieving dynamic adaptation to service requirements.
Data Source
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AI summary
The present invention provides a power control method, a user equipment, and a base station. The method includes: receiving, by a UE, a power control parameter set sent by a base station, where the power control parameter set includes at least one power control parameter group, where the power control parameter group includes at least one power control parameter; determining, by the UE, a first power control parameter group according to the power control parameter set; and determining, by the UE, a transmit power of the UE according to a power control parameter in the first power control parameter group. In the method provided by embodiments of the present invention, the UE may determine, according to a service requirement or an instruction from the base station, the first power control parameter group to be used by the UE, so that the UE obtains through calculation, according to the power control parameter in the first power control parameter group, the transmit power that satisfies a service currently initiated by the UE, and a communication range of the UE is ensured.