Cognitive Radio Secondary System Uplink Downlink Configuration Detection

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

In cognitive radio systems, secondary systems face challenges in acquiring uplink/downlink configuration information for channel resources in primary systems without interfering with primary users, especially when the primary system cannot change its settings and may transmit erroneous information to prevent secondary system access.

Innovation Solution

A method and apparatus in the secondary system that receive communication signals from the primary system, extract features reflecting the difference between uplink and downlink transmission modes, and judge the channel resource configuration without interacting with the primary system, using techniques like energy detection and threshold-based analysis to determine if a channel resource is used for uplink or downlink transmission.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of information

If the secondary system performs information interaction with the primary system to acquire uplink/downlink configuration information, then the information acquisition is straightforward, but the primary system cannot change its settings and the secondary system must remain transparent to the primary system

Engineering Contradiction:

Improveconfiguration information acquisitionVSAvoidsystem transparency

Core Design Contradiction:

Loss of informationVSAdaptability or versatility

Solution Approach 1:

The secondary system independently acquires uplink/downlink configuration information by monitoring and analyzing primary system signals without requiring the primary system to provide this information through interaction. The secondary system extracts configuration patterns from observed signal characteristics, enabling self-service information acquisition while maintaining transparency.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent introduces signal monitoring and feature extraction mechanisms as intermediaries between the secondary system and primary system. These intermediaries enable the secondary system to indirectly obtain configuration information by analyzing primary system transmissions, avoiding direct interaction while still acquiring necessary knowledge.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Ease of operation

If the primary system actively transmits channel resource configuration information to the secondary system, then the secondary system can acquire information easily, but the primary system may transmit error information to prevent secondary system access

Engineering Contradiction:

Improveinformation transmissionVSAvoidinformation correctness

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The secondary system monitors primary system signals and extracts configuration information through pattern recognition and analysis. By observing actual signal transmissions and their characteristics, the secondary system can verify and validate the acquired configuration information, creating a feedback mechanism that ensures reliability without depending on primary system honesty.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent converts the potential harm of primary system selfish behavior into a benefit by having the secondary system independently verify configuration information through signal analysis. Instead of trusting primary system transmissions, the secondary system uses them as data sources for independent validation, turning potential deception into an opportunity for autonomous verification.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

3Adaptability or versatility

If the secondary system monitors and analyzes primary system signals to determine uplink/downlink configuration, then system transparency is maintained, but the complexity of signal processing increases

Engineering Contradiction:

Improvesystem transparencyVSAvoidsignal processing complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The signal processing task is segmented into distinct stages: signal reception, feature extraction, pattern recognition, and configuration determination. Each stage processes specific aspects of the signals independently, reducing overall complexity by breaking down the monolithic processing task into manageable segments that can be handled by specialized modules.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The secondary system performs preliminary signal monitoring and feature extraction to identify patterns before making configuration decisions. By preparing and pre-processing signal data in advance, the system reduces the complexity of final configuration determination, as the heavy lifting of signal analysis is completed beforehand.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentEP3883173A1Cognitive radio communication system, and device and method used therein

Publication Date: 2021.09.22 SONY GROUP CORP

Figure 1~3
Figure 2
Figure 4~5

AI summary

Provided are a cognitive radio communication system, and a device and method used therein. A device used in a cognitive radio communication system can include: a receiving apparatus, for receiving a communication signal among various devices in another radio communication system; a feature extraction apparatus, for extracting one or more features that can reflect the difference between the uplink and downlink transmission methods of the other radio communication system; and an uplink/downlink judgment apparatus, for judging whether the channel resource occupied by the communication signal is used for uplink transmission or downlink transmission according to the features.