Cognitive Radio Spectrum Sensing via Protocol Layer Analysis
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current Dynamic Spectrum Access (DSA) and Dynamic Spectrum Management (DSM) techniques in communication networks face challenges such as frequent collisions between Primary User (PUN) and Secondary User (SUN) communications due to limited spectrum sensing capabilities and coordination methods, leading to inefficiencies in utilizing licensed wireless spectrum.
Innovation Solution
The system employs cognitive radio nodes that perform advanced spectrum sensing and management by analyzing protocol layer operations, using both physical and upper-layer protocol information to identify unused spectrum 'holes' and coordinate access, minimizing interference with PUN communications through a novel time-related coordination technique.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If SUNs use conventional physical layer spectrum sensing approaches to detect and coordinate spectrum holes, then spectrum access coordination is achieved, but collisions between PUN and SUN communications occur frequently
Solution Approach 1:
The patent extends spectrum sensing from the physical layer to multiple upper protocol layers (data link, network, transport, session, presentation, and application layers). This dimensional expansion allows SUNs to detect protocol layer operations and identify spectrum holes with higher reliability, reducing collisions with PUN communications by understanding not just signal presence but also communication context and patterns across multiple protocol dimensions.
2Device complexity
If SUNs implement only physical layer cognition for spectrum analysis, then system complexity is reduced, but spectrum utilization efficiency is limited
Solution Approach 1:
The patent implements a universal cognitive architecture where SUNs can perform spectrum analysis across all seven OSI protocol layers. This multi-functional capability allows the same cognitive infrastructure to handle diverse spectrum sensing tasks including physical signal detection, data link layer frame analysis, network layer routing patterns, and higher-layer application behavior, thereby maximizing spectrum utilization efficiency without proportionally increasing complexity.
3Reliability
If 98% of wireless spectrum is allocated through licensing to PUNs, then spectrum management control is improved, but only 11% of licensed spectrum is actually utilized
Solution Approach 1:
The patent enables SUNs to autonomously perform spectrum sensing, analysis, and coordination across multiple protocol layers to identify and utilize unused licensed spectrum. This self-service capability allows secondary users to independently detect spectrum holes and coordinate access without requiring additional centralized licensing or control mechanisms, thereby improving overall spectrum utilization while maintaining the existing licensing framework for PUNs.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Systems (100) and methods (700) for dynamically managing Secondary User Node ("SUN") access to a segment of a wireless spectrum licensed for use by Primary User Nodes ("PUNs"). The methods comprise: detecting physical data transfers by PUNs (110-122) at first licensed frequencies (f1, f2, f3, f4) during slot sample times of a first epoch (t1-t15); generating a report comprising sensed spectral data indicating (a) during which of the slot sample times each physical data transfer was detected by a respective SUN (102-108) and (b) at which of the first licensed frequencies each physical data transfer occurred; receiving a report broadcasted from a remote SUN at a non-licensed frequency during a respective slot report times (t16-t19) of the first epoch; and analyzing the sensed spectral data of the reports to determine a time for using a first licensed frequency without interfering with or only minimally interfering with use thereof by PUNs.