Wireless Spectrum Coordination for Low Power Device Interference
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Solution Overview
Problem
Current wireless broadband networks face challenges in coexisting with low power, short-range communications systems due to interference from high power wireless network base stations, as conventional systems fail to effectively manage shared frequency bands, leading to excessive interference.
Innovation Solution
A method for coordinating shared wireless spectrum use involves detecting activation of low power devices, negotiating frequency use with the network, and enabling operation on allowed frequencies to minimize interference, using a computing device with a memory, communication module, and processor to manage frequency coordination between wireless devices and networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If high power wireless network base stations operate on shared frequency bands, then network coverage and capacity are improved, but interference to low power co-spectrum devices increases
Solution Approach 1:
The system performs preliminary detection of low power devices before high power base station transmissions. The base station detects the presence of low power devices on shared frequencies and proactively adjusts its transmission parameters or selects alternative frequencies to avoid interference, rather than waiting for interference to occur
Solution Approach 2:
The base station dynamically adjusts its operating frequency and transmission parameters based on real-time detection of low power device activity. The system continuously monitors the spectrum and adapts its frequency usage to accommodate low power devices while maintaining network performance
2Ease of operation
If base stations use fixed frequency assignments, then network operation is simplified, but flexibility to accommodate low power devices is reduced
Solution Approach 1:
The base station transitions from fixed frequency assignment to dynamic frequency selection. The system maintains simplified operation through automated frequency management while gaining the flexibility to detect and accommodate low power devices by selecting from multiple available frequencies based on real-time conditions
3Productivity
If base stations transmit at high power levels, then network capacity is improved, but detection of low power device transmissions becomes difficult
Solution Approach 1:
The base station performs preliminary spectrum sensing and detection operations before initiating high power transmissions. By detecting low power devices in advance and identifying their operating frequencies, the base station can avoid those frequencies or adjust its transmission strategy, enabling both high capacity operation and accurate detection of low power devices
Data Source
AI summary
Technologies are presented for enabling a relatively low power, limited range communications system (or, alternatively, a terminal in a directional, point-to-point communications link), using native data communications services provided by an overlying wireless network, to automatically (or semi-automatically) negotiate with that network for use of specific portions of the frequency band or bands that are used in common by the low power device and the overlying network. Frequency management capabilities inherent to the wireless network may be utilized to automatically execute the resulting frequency use coordination. Through the coordination, the low power (or point-to-point) communications system may be protected from potentially excessive interference from the overlying network and/or user devices operating on that network (and vice-versa) while minimizing any impact on performance and capacity of the overlying network.