Uplink Interference Mitigation via Dynamic Power Control
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Solution Overview
Problem
Uplink signal interference from directional antennas to non-serving nodes is a significant issue in wireless telecommunications, as the focused transmission can exceed necessary coverage areas, causing unwanted interference with adjacent nodes.
Innovation Solution
The method involves reducing the transmit power of uplink signals based on the received signal power levels from non-serving nodes and determining an optimal antenna orientation that balances strong serving node signal reception with minimal interference to adjacent nodes by calculating power reduction amounts for each potential orientation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If directional antennas transmit uplink signals at high power levels, then the signal strength to serving nodes is improved, but interference to non-serving adjacent nodes increases
Solution Approach 1:
The patent applies local quality by adjusting the transmit power level specifically for uplink signals based on the spatial relationship between nodes. The system identifies non-serving adjacent nodes and calculates appropriate power reduction amounts for signals directed toward those nodes, while maintaining full power for signals to serving nodes. This creates a localized power adjustment that targets interference problems in specific directions without affecting overall system performance.
Solution Approach 2:
The patent implements parameter changes by dynamically modifying the transmit power parameter of uplink signals based on received downlink signal characteristics from non-serving nodes. The system measures downlink signal power levels, compares them against thresholds, and adjusts the uplink transmit power parameter accordingly. This dynamic parameter adjustment resolves the contradiction by adapting power levels to real-time network conditions.
2Power
If directional antennas are oriented to maximize serving node signal reception, then connection strength is improved, but interference to adjacent non-serving nodes increases
Solution Approach 1:
The patent applies dynamics by making the antenna orientation adjustable and reconfigurable based on network conditions. Instead of fixing the antenna in a static position, the system evaluates multiple potential orientations, assesses the interference impact of each, and dynamically selects the optimal orientation that balances serving node reception with minimal interference to non-serving nodes. This dynamic reconfiguration allows the system to adapt to changing network topologies and traffic patterns.
Solution Approach 2:
The patent implements preliminary action by evaluating potential antenna orientations and calculating interference impacts before actually deploying a specific orientation. The system performs forward-looking assessments of downlink signal characteristics and uplink interference patterns for each potential orientation, selecting the optimal configuration in advance. This preliminary evaluation prevents interference problems rather than reacting to them after they occur.
3Object-affected harmful factors
If uplink signal transmit power is reduced to mitigate interference, then interference to non-serving nodes is decreased, but signal strength to serving nodes may be compromised
Solution Approach 1:
The patent applies segmentation by dividing the uplink signal transmission into different power levels based on the target node. The system segments power allocation between serving nodes (full power) and non-serving adjacent nodes (reduced power). By identifying which nodes are serving versus non-serving, the system applies differentiated power levels to each segment, ensuring that interference is reduced to non-serving nodes while maintaining full signal strength to serving nodes.
Solution Approach 2:
The patent implements feedback by using downlink signal characteristics from non-serving nodes as input to adjust uplink transmit power. The system continuously monitors downlink signal power levels from adjacent nodes, uses this feedback information to calculate appropriate power reduction amounts, and applies these adjustments to uplink transmissions. This closed-loop feedback mechanism ensures that power reduction is applied only when and where interference is actually occurring, preserving signal strength to serving nodes.
Data Source
AI summary
A device, method, and computer-readable medium are provided for mitigating uplink signal interference to non-serving nodes in a wireless communications system. An uplink signal is transmitted from a subject node to a serving node. The subject node receives a non-serving node downlink signal from a non-serving node. Based on one or more ascertained characteristics of the downlink signal received from the non-serving node, the subject node determines that the uplink signal transmitted therefrom is causing interference to the non-serving node. The subject node reduces a transmit power level of the uplink signal in response to determining that the uplink signal is causing interference with the non-serving node. In some instances, an optimal orientation for positioning an antenna coupled to the subject node can be determined by employing aspects of the foregoing.