Sensor Node Management via Location Server Address Translation
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Solution Overview
Problem
Current sensor networks operating under IEEE 802.15.4 and ZigBee standards use independent 16-bit or 64-bit addresses, isolating them from IP networks, leading to inefficiencies in energy consumption and mobility due to the requirement of IPv6 and 6LowWPAN adaptation layers in resource-limited RFID/sensor nodes.
Innovation Solution
A system that assigns a global ID to RFID/sensor nodes using a location information server, enabling address translation between local and global IDs, allowing efficient interaction between sensor networks and IP networks, and ensuring node mobility through a gateway system that registers and manages node information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If IPv6 and 6LowWPAN adaptation layers are implemented in RFID/sensor nodes to enable IP network connectivity, then network interoperability is improved, but energy consumption increases due to large processing load
Solution Approach 1:
The patent introduces a gateway as an intermediary device between the sensor network and IP network. The gateway performs protocol adaptation and address translation functions, eliminating the need for resource-intensive IPv6 and 6LowWPAN adaptation layers in the sensor nodes themselves. This mediator approach maintains network interoperability while significantly reducing energy consumption at the node level.
2Device complexity
If independent 16-bit or 64-bit address systems are used in sensor networks, then network simplicity is improved, but connectivity to IP networks deteriorates
Solution Approach 1:
The gateway serves as an address translation intermediary, mapping between simple local IDs (16-bit or 64-bit) used in sensor networks and global IDs (IP addresses) used in IP networks. This allows sensor nodes to maintain simple addressing while achieving IP network connectivity through the gateway's translation services.
Solution Approach 2:
The addressing system is segmented into two parts: local ID (for sensor network identification) and gateway ID (for IP network routing). This segmentation allows each part to optimize for its specific purpose while working together to achieve both network simplicity and IP connectivity.
3Ease of operation
If sensor nodes use fixed address systems, then network management simplicity is improved, but node mobility is hindered
Solution Approach 1:
The patent implements a dynamic address binding mechanism where global IDs are associated with sensor nodes through the gateway rather than being fixed to specific nodes. When nodes move between gateways, their global ID bindings are dynamically updated, maintaining IP network connectivity without requiring reconfiguration of the nodes themselves. This dynamic approach preserves both management simplicity and mobility capability.
Data Source
AI summary
A sensor node management system in a Radio Frequency Identification/Ubiquitous Sensing Network (RFID/USN) infrastructure is provided, in which a sensor node has a local ID in a sensor network, a gateway receives, from the sensor node, node information including the local ID and an ID of a home gateway to which the sensor node initially belongs and registers the node information about the sensor node to a location information server, and the location information server registers and manages node information about sensor nodes within an area of the gateway. The location information server generates a global ID using the local ID and the ID of the home gateway, the global ID being recognized as an address of the sensor node by an Internet Protocol (IP) network.