IP-USN Multiple Router Topology for External Network Access
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Solution Overview
Problem
Sensor networks with single routers can only facilitate communication among sensor nodes, limiting their ability to connect with external networks and adapt to frequent topology changes due to environmental influences.
Innovation Solution
Implementing an Internet protocol (IP)-ubiquitous sensor network with multiple routers, where sensor nodes designate a default router based on proximity and use a communication method involving router request (RREQ) and advertisement (RA) messages to maintain updated location information and ensure efficient communication with external networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If only one router is included in the sensor network, then communication among sensor nodes is simple, but communication with external networks is not possible and the system lacks adaptability to topology changes
Solution Approach 1:
The patent implements multiple routers in the sensor network, where each router can serve dual purposes: facilitating communication among sensor nodes within the network and providing access to external networks. This multi-functional approach resolves the contradiction by enabling external network communication without adding excessive complexity, as the same router infrastructure serves both internal and external communication needs.
2Adaptability or versatility
If sensor nodes use fixed position for information collection, then communication stability is maintained, but the network cannot adapt to environmental changes and mobility requirements
Solution Approach 1:
The patent implements dynamic topology reconfiguration capability in the sensor network, allowing sensor nodes to change positions and roles based on environmental conditions. The network maintains communication stability through automatic route discovery and maintenance protocols that adapt to topology changes, resolving the contradiction between adaptability and reliability by making the network structure dynamic rather than fixed.
3Use of energy by moving object
If sensor nodes implement simple communication elements, then power consumption and device complexity are reduced, but rapid topology reconfiguration capability is limited
Solution Approach 1:
The patent divides the communication functionality into segments: simple sensor nodes with minimal processing requirements, and dedicated router nodes that handle complex routing and topology management tasks. This segmentation allows sensor nodes to maintain low power consumption while the network as a whole achieves rapid topology reconfiguration through the coordinated action of multiple routers that can independently manage route discovery and maintenance.
Data Source
AI summary
A router connects an Internet protocol (IP)-ubiquitous sensor network (USN) with an external network. The IP-USN is disclosed when the IP-USN includes one or more routers. An IP-USN with multiple routers includes one or more routers, and sensor nodes in the IP-USN may reliably communicate with the external network. The sensor nodes in the IP-USN may communicate with one another using the router if necessary. When one router does not operate, communication with the external network is performed by using other routers.