Cognitive Network Leader Node Channel Switching
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Solution Overview
Problem
Existing cognitive radio networks face inefficiencies in battery consumption and seamless communication due to individual node scanning and channel switching, leading to potential disruptions and suboptimal spectrum utilization.
Innovation Solution
A method where a leader node manages channel access and switching for all nodes in a cognitive network, reducing individual node scanning and sharing leadership through a credit mechanism, allowing all nodes to communicate in a single channel and switch seamlessly to another upon primary user detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If individual nodes perform scanning and channel switching independently, then each node can autonomously access available spectrum, but battery consumption increases and communication disruptions occur
Solution Approach 1:
Multiple secondary nodes merge their scanning operations into a single coordinated action performed by one designated node. The patent establishes that secondary nodes share a common scanned channel list and coordinate their scanning activities, eliminating redundant individual scanning operations and reducing overall energy consumption while maintaining communication reliability through centralized channel management.
Solution Approach 2:
A designated node acts as an intermediary that performs scanning on behalf of the group and shares results with all other secondary nodes. This intermediary approach allows nodes to avoid independent scanning while still accessing accurate channel availability information, thereby reducing battery consumption without compromising the ability to switch channels seamlessly when primary users appear.
2Productivity
If multiple nodes scan channels independently, then each node has up-to-date channel availability information, but spectrum utilization efficiency decreases due to redundant scanning
Solution Approach 1:
The patent combines scanning operations of multiple secondary nodes into a single coordinated scanning activity. By establishing that nodes share a common scanned channel list and coordinate their scanning, the system eliminates redundant scanning efforts while maintaining efficient spectrum utilization through shared information about channel availability and primary user activity.
3Use of energy by moving object
If a leader node manages channel access for all nodes, then battery consumption is reduced and network maintenance is simplified, but the system becomes more complex to implement
Solution Approach 1:
The patent introduces a leader node as an intermediary that centralizes scanning and channel management functions. This leader node maintains the scanned channel list and coordinates channel switching decisions for all secondary nodes. While this adds implementation complexity regarding leader selection and coordination protocols, it significantly reduces battery consumption by eliminating redundant scanning operations and simplifies network maintenance through centralized management.
Data Source
AI summary
The invention relates to a method of accessing a channel in a wireless network having a plurality of communication nodes, the method comprising identifying a first channel available for use, forming a cognitive network to manage utilization of said first channel, said cognitive network comprising a leader node and at least one of said plurality of said communication nodes, managing said cognitive network by means of said leader node including identifying a second channel available for use in an event that said first channel being no longer available for use, and switching to said second channel upon said second channel being identified.