Cell Load-Based Transmission Power Control for Interference Mitigation
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Solution Overview
Problem
Communication systems with a multi-cell configuration experience interference between neighbor cells, leading to decreased signal transmission/reception performance and inadequate Quality of Service (QoS) due to shared limited resources, necessitating a power control method to minimize interference and enhance system performance.
Innovation Solution
A power control method and system that involves a transmitter receiving feedback information from receivers, calculating data rates and cell load, and adjusting transmission power based on thresholds to optimize data transmission and minimize interference, using a utility function to determine transmission power and adjust accordingly to ensure efficient resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple cells share limited frequency resources, then resource utilization is improved, but interference between neighbor cells increases
Solution Approach 1:
The patent dynamically adjusts transmission power parameters based on cell load conditions. When cell load is high, transmission power is reduced to minimize interference to neighboring cells. When cell load is low, transmission power is increased to improve resource utilization. This parameter adaptation resolves the contradiction between resource utilization and interference mitigation.
Solution Approach 2:
The patent implements a feedback mechanism where the transmitter receives feedback information from receivers about channel conditions and interference levels. Based on this feedback, the transmitter adjusts its transmission power dynamically. This closed-loop control enables the system to automatically balance resource utilization against interference, resolving the technical contradiction.
2Reliability
If transmission power is increased to improve signal reception, then reception performance is improved, but interference to neighbor cells increases
Solution Approach 1:
The patent makes transmission power dynamic rather than static. The transmitter continuously adjusts power levels based on real-time cell load conditions and feedback from receivers. This dynamic adaptation allows the system to maintain reliable reception when needed while minimizing interference when possible, resolving the contradiction between reception performance and interference generation.
Solution Approach 2:
The patent changes the transmission power parameter based on operating conditions. When cell load is high or interference to neighbors is problematic, power is reduced. When cell load is low and reception performance needs improvement, power is increased. This conditional parameter adjustment resolves the contradiction between reliable reception and interference mitigation.
3Object-affected harmful factors
If transmission power is dynamically adjusted based on cell load, then interference is minimized, but system complexity increases
Solution Approach 1:
The patent enables the communication system to self-regulate transmission power without requiring complex external control mechanisms. Each transmitter autonomously adjusts its power based on simple load measurements and feedback from its own receivers. This self-service approach minimizes interference while avoiding the need for complex centralized power control systems.
Solution Approach 2:
The patent divides the power control function into independent, simple modules at each transmitter-receiver pair. Each transmitter independently calculates cell load and adjusts power based on simple threshold comparisons. This segmentation of the control function into simple, distributed units achieves interference minimization without requiring a complex centralized control system.
Data Source
AI summary
A method for controlling power in a communication system. In the power control method, a transmitter receives feedback information from receivers located in its own cell; determines data rates of the receivers according to the received feedback information, calculates a load of the cell by calculating an amount of data to be transmitted to the receivers; and calculates transmission power of the transmitter by comparing the load of the cell with a threshold.