Basestation Downlink Power Setting via Pathloss Feedback
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Solution Overview
Problem
In cellular communication networks, setting downlink transmission power for basestations to ensure adequate signal strength across coverage areas while minimizing interference between femtocell access points is inefficient, as high power transmission can lead to signal overlap and interference issues.
Innovation Solution
A method for determining downlink power by setting a target signal strength value and calculating it based on measured pathloss values between basestations, ensuring optimal signal reception across coverage areas without excessive interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If basestations transmit at highest possible power, then signal strength across coverage area is improved, but interference between basestations increases
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the downlink transmission power of basestations based on measured pathloss values and detected signals from neighboring basestations. Instead of using fixed maximum power, the system calculates optimal power levels by changing the power parameter according to real-time network conditions, thereby maintaining adequate signal strength while reducing interference.
2Area of stationary object
If basestations transmit at highest possible power, then coverage area is improved, but power efficiency deteriorates
Solution Approach 1:
The system changes the transmission power parameter dynamically based on actual coverage requirements. By measuring pathloss and detecting neighboring basestation signals, the system calculates the minimum necessary power to achieve adequate coverage, thereby avoiding unnecessary energy consumption while maintaining required coverage area.
3Reliability
If downlink power is set to ensure adequate signal strength, then signal reception quality is improved, but interference with neighboring basestations increases
Solution Approach 1:
The patent implements feedback by having each basestation detect signals from neighboring basestations and use this information to adjust its own downlink power. This closed-loop feedback mechanism ensures that signal reception quality is maintained while automatically reducing power when neighboring basestations are nearby, thereby minimizing interference.
Solution Approach 2:
The system adjusts the downlink power parameter based on feedback from signal detection and pathloss measurement, changing the power level to balance reception quality and interference reduction.
Data Source
AI summary
A basestation receives a table containing information about a plurality of other basestations of the cellular communications network. The basestation and the plurality of other basestations are connected to a local area network. The operation of receiving the table includes receiving the table over the local area network from one of the other basestations. The table contains information for use by the basestation in automatically configuring itself. In the event that the basestation changes its configuration, the basestation updates said table with changed information and rebroadcasts the updated table to the other basestations.