Wireless Transmit Power Adjustment via Neighbor Interference Feedback
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Solution Overview
Problem
Wireless networks face interference issues when wireless devices increase their transmit power levels, affecting neighboring sectors and degrading voice and data services, as existing systems lack effective methods to balance power adjustments with interference mitigation.
Innovation Solution
A method and system that adjust the transmit power level of a wireless device based on measured interference to neighboring sectors, using reference signal strength and path loss calculations to determine optimal power settings that minimize interference while enhancing coverage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the transmit power level of a wireless device is increased to improve uplink signal robustness, then the uplink transmission quality is improved, but interference to neighboring sectors increases
Solution Approach 1:
The system implements a feedback mechanism where the network node receives interference measurements from neighboring sectors and adjusts the transmit power level of the wireless device accordingly. The network node determines a maximum transmit power level based on reported interference values, creating a closed-loop control system that dynamically balances uplink signal quality with interference mitigation to neighboring sectors.
Solution Approach 2:
The system changes the transmit power level parameter dynamically based on network conditions and interference measurements. Instead of using a fixed default power level, the network node adjusts the maximum transmit power level as a controllable parameter, allowing optimization of uplink performance while preventing excessive interference to neighboring sectors through continuous parameter adaptation.
2Productivity
If the transmit power level is increased to meet high data requirements, then data transmission capability is improved, but service quality in neighboring sectors deteriorates
Solution Approach 1:
The system uses feedback from neighboring sectors regarding interference levels to dynamically adjust the wireless device's transmit power. Network nodes monitor the impact of high data rate transmissions on neighboring sectors and communicate interference measurements back to control the transmit power, ensuring that data transmission requirements are met without compromising service quality in adjacent sectors.
Solution Approach 2:
The transmit power level is transformed from a static default value to a dynamic parameter that adapts to changing network conditions. The system enables the wireless device to adjust its transmit power level in real-time based on data requirements and interference conditions, allowing high data transmission capability when needed while automatically reducing power when neighboring sectors are affected.
3Device complexity
If a default transmit power level is assigned to all wireless devices, then system simplicity is maintained, but performance optimization for specific applications is limited
Solution Approach 1:
The system maintains the simplicity of default power level assignment while enabling performance optimization through dynamic parameter adjustment. The network node determines a maximum transmit power level that serves as an optimized parameter for each wireless device based on application requirements and interference conditions, allowing the device to switch between default and optimized power levels as needed without increasing overall system complexity.
Data Source
AI summary
A transmit power level of a wireless device is adjusted based on an uplink interference to neighboring sectors caused by the transmit power level. The wireless device can estimate the uplink interference using a reference signal transmitted by each neighboring sector. The uplink interference is based on a loss of signal strength of the reference signal as measured at the wireless device, i.e. a path loss. A determination is made to adjust the transmit power level of the wireless device so as to improve a coverage area of the serving sector, without generating excessive interference in neighboring sectors. Consequently, a transmit power level increase is based on a function of the data demand of the wireless device, the interference caused to neighbors, and the load on neighboring sectors.