Mobile Wireless Offload Interference Reduction via Power and Attenuation Control
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Solution Overview
Problem
Wireless data offload systems face challenges in reducing interference, particularly in mobile environments like public transportation vehicles, where high throughput requirements lead to increased interference and packet losses, affecting data transfer reliability and efficiency.
Innovation Solution
A method that adjusts the transmission power of mobile communication units and access points to maximum levels and compensates for interference by attenuating signals to optimal levels, using adjustable attenuators to maintain signal strength and reduce receiver cell size, thereby minimizing interference and ensuring reliable data transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If transmission power is increased to achieve maximum throughput, then data transfer speed is improved, but interference between wireless devices increases
Solution Approach 1:
The patent applies local quality by making each access point transmit on a different frequency channel rather than using a uniform frequency across all access points. This localized differentiation in frequency allocation reduces interference while maintaining high transmission power for maximum throughput.
Solution Approach 2:
The system dynamically changes the frequency parameter for each access point based on its location and transmission characteristics. By assigning different frequency channels to different access points, the system optimizes the balance between transmission power and interference levels.
2Productivity
If transmission power is increased to achieve maximum throughput, then data transfer efficiency is improved, but packet losses increase due to interference
Solution Approach 1:
Each access point operates on a locally optimized frequency channel that minimizes interference with neighboring access points. This localized frequency allocation reduces packet losses while maintaining high data transfer efficiency.
Solution Approach 2:
The system monitors transmission conditions and adjusts frequency allocations to maintain optimal performance. By detecting interference patterns and adapting frequency assignments, the system reduces packet losses while preserving throughput efficiency.
3Device complexity
If uniform frequency allocation is used across all access points, then system simplicity is maintained, but interference between access points increases
Solution Approach 1:
The patent implements local quality by assigning different frequency channels to different access points based on their spatial locations. This approach increases frequency allocation complexity but significantly reduces interference between access points, improving overall system performance.
Solution Approach 2:
The frequency spectrum is segmented and allocated to different access points rather than using a uniform frequency. This segmentation reduces interference by separating transmissions in the frequency domain, at the cost of increased allocation complexity.
Data Source
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AI summary
A method and related apparatus for transferring data between a mobile communication unit and a plurality of access points, wherein each of said plurality of access points and said mobile communication unit is provided with a transceiver, said mobile communication unit being arranged to travel a predetermined route, the method comprising: adjusting transmission power of at least the transceiver of the mobile communication unit substantially to a maximum level; and attenuating transmission signal of each transceiver such that signal level of a received signal in a transmission between the mobile communication unit and each of the access points is more optimal, wherein the level of attenuation is set constant at least in the mobile communication unit.