Dynamic Regulation-Compliance Mode Switching in Cognitive Radio
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Solution Overview
Problem
Secondary devices in cognitive radio networks are limited by regulatory compliance requirements, restricting their operational flexibility and increasing costs due to restrictive regulation-compliance modes that impact channel selection, transmission power, and mobility.
Innovation Solution
A method for dynamically reconfiguring the regulation-compliance mode of secondary devices based on their primary protection mechanism capabilities, allowing devices to adapt their operation by periodically determining their primary protection capabilities and availability of enabling signals to switch between geolocation and sensing-only modes, thereby optimizing network operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a secondary device employs a more complete set of protection mechanisms (e.g., geolocation database access), then the degree of freedom to operate (channel selection, transmission power, network formation) is improved, but the implementation cost and operating cost increase
Solution Approach 1:
The patent applies dynamics by enabling secondary devices to dynamically switch between different regulation-compliance modes (Mode I, Mode II, sensing-only) based on real-time conditions such as database availability, location change frequency, and network requirements. This allows the device to adapt its protection mechanism set dynamically rather than being statically configured, resolving the contradiction between having complete protection mechanisms and maintaining low implementation cost.
2Adaptability or versatility
If a secondary device operates in Mode II with geolocation database access, then channel selection flexibility is improved, but power consumption increases and battery life decreases
Solution Approach 1:
The patent applies parameter changes by allowing the secondary device to change its operational parameters (regulation-compliance mode) based on conditions such as database availability and location stability. When the device is stationary and database access is available, it operates in Mode II with high channel selection flexibility. When the device moves frequently or database access is unavailable, it switches to sensing-only mode with lower power consumption, thus resolving the contradiction between channel selection flexibility and power consumption.
3Adaptability or versatility
If a secondary device frequently relocates, then operational flexibility is improved, but the ability to access geolocation database timely deteriorates
Solution Approach 1:
The patent applies dynamics by enabling the secondary device to dynamically adjust its regulation-compliance mode based on location change frequency. For frequently relocating devices, the system automatically switches from Mode II (database-dependent) to sensing-only mode, eliminating database access delays and maintaining operational flexibility. This dynamic adaptation resolves the contradiction between operational flexibility and database access time.
4Device complexity
If sensing capability is employed without geolocation database access, then operating cost is reduced, but transmission power limit decreases
Solution Approach 1:
The patent applies dynamics by allowing the secondary device to switch between sensing-only mode (lower operating cost, 50 mW limit) and Mode II (higher operating cost, 100 mW limit) based on real-time conditions. When the device is stationary and database access is reliable, it operates in Mode II with higher transmission power. When the device moves or database access is unavailable, it switches to sensing-only mode with lower power consumption, thus resolving the contradiction between operating cost and transmission power limit.
Data Source
AI summary
A method for dynamically reconfiguring a regulation-compliance mode of a device, belonging to a wireless network and operating under a network-operation mode (311, 321, 322) in a spectrum band with primary users. The method includes periodically determining at least one of: a primary protection capability of the device (501, 502, 704, 705), availability of enabling signal to the device (601, 701), and a frequency of location change of the device (508, 510, 711, 712); and based on the results of such determinations, operating and configuring transmission parameters of the device according to one of a plurality of regulation-compliance modes that are supported by the device. The wireless device includes: a signal transceiver (201) for processing, transmitting and receiving wireless signals from secondary devices; a primary signal sensing module (202) for detecting a primary signal; a spectrum manager (204) for selecting or deselecting an operating frequency channel; and a geolocation module for determining the location of the device. The wireless device may further include a network interface (203) for accessing a TV band database and a geolocation database.