Wireless Device Transmission Power Control for Interference Management
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Solution Overview
Problem
In high interference environments, existing communication systems face performance degradation due to increased transmission power, which is necessary to maintain signal-to-noise ratio (SNR), leading to inefficient system operation.
Innovation Solution
A method and apparatus that dynamically adjust transmission power based on interference levels, transmitting with a higher power when interference is low to achieve a desired SNR and reducing power when interference is high to maintain a lower SNR, thereby optimizing system performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If transmission power is increased to maximum to maintain required SNR in high interference environment, then signal quality is improved, but system performance deteriorates due to increased interference
Solution Approach 1:
The patent implements dynamic transmission power adjustment based on real-time interference level detection. The system transitions from static power settings to adaptive power control, where transmission power is continuously modified according to measured interference conditions, resolving the contradiction between maintaining signal quality and reducing interference
Solution Approach 2:
The system changes the transmission power parameter dynamically based on interference measurements. By adjusting this critical parameter in response to environmental conditions, the system optimizes the balance between achieving required SNR and minimizing harmful interference to other users
2Area of stationary object
If transmission power is fixed at maximum allowed power, then signal coverage is improved, but energy consumption increases and system performance degrades
Solution Approach 1:
The patent dynamically adjusts transmission power parameters based on detected interference levels and link quality requirements. This eliminates the need for fixed maximum power operation, allowing the system to use minimum necessary power while maintaining coverage, thus reducing energy consumption without sacrificing coverage area
3Reliability
If transmission power is increased to compensate for pathloss, then SNR at receiver is improved, but interference to other communications increases
Solution Approach 1:
The patent implements localized power adjustment where each transmitter adapts its power level based on local interference conditions and link requirements. This allows different transmitters to use different power levels appropriate to their specific situations, achieving required SNR locally while minimizing overall system interference
Solution Approach 2:
The system uses interference level detection as feedback to continuously adjust transmission power. This closed-loop control ensures that power is increased only when necessary to maintain SNR, and reduced when interference levels are already acceptable, optimizing the trade-off between signal quality and interference generation
Data Source
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AI summary
A method of operating a wireless device is provided in which an interference level on a resource is determined. In addition, a signal is transmitted on the resource with a first power when the interference level is low. The first power is such that the signal is received with a first SNR. Furthermore, the signal is transmitted on the resource with a second power when the interference level is high. The second power is such that the signal is received with a second SNR less than the first SNR.