Hierarchical ID Allocation in Wireless Sensor Networks
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Solution Overview
Problem
Existing methods for generating and registering node IDs in wireless sensor networks face challenges such as ID duplication, excessive traffic at the base station, and difficulty in managing mobile nodes, which hinder efficient network configuration and data management.
Innovation Solution
A method that involves generating and registering IDs using a hierarchical structure, where nodes detect ID duplication and re-generate if necessary, and store IDs with hierarchical information and equipment details, allowing for distributed management and reduced load on access nodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If a random number generating method is used to allocate IDs to nodes, then ID allocation can be automated, but ID duplication may occur and control traffic may concentrate at the base station
Solution Approach 1:
The patent divides the ID allocation process into segments: first layer nodes generate initial IDs independently, then second layer nodes verify uniqueness by checking against stored IDs from first layer nodes. This segmentation distributes the verification load and prevents duplication without requiring all nodes to contact a central base station for every ID allocation.
Solution Approach 2:
The patent introduces second layer nodes as intermediaries between first layer nodes and the base station. These intermediary nodes perform duplicate detection and coordinate ID registration, reducing direct traffic to the base station while ensuring ID uniqueness across the network.
2Reliability
If a central managing method is used where base station allocates IDs to sensor nodes, then ID duplication can be prevented, but excessive traffic occurs at the base station
Solution Approach 1:
The patent segments the centralized ID management function by introducing second layer nodes that handle duplicate detection and registration locally. This distributes the management burden from the base station to intermediate nodes, reducing energy consumption at the base station while maintaining ID uniqueness through hierarchical verification.
Solution Approach 2:
The patent enables second layer nodes to perform self-service by autonomously detecting duplicate IDs and managing registration processes without requiring constant base station intervention. This self-service capability reduces the energy burden on the base station while maintaining reliable ID allocation.
3Ease of manufacture
If location based method is used to allocate IDs to nodes, then ID allocation can be simplified, but it depends on location information and is difficult to be applied to mobile nodes
Solution Approach 1:
The patent enables nodes to generate and register their own IDs autonomously through the hierarchical process without requiring external location services. First layer nodes generate IDs independently, and second layer nodes verify uniqueness, making the system adaptable to mobile nodes that may move between network areas without requiring location-based ID reassignment.
Data Source
AI summary
A method for generating and registering an identification in a wireless sensor network. The method includes generating an identification of a first layer node; transmitting the identification of the first layer node to a second layer node; detecting whether the identification of the first layer node is duplicated, using the second layer node; if the identification of the first layer node is not duplicated, transmitting a determination message from the second layer node to the first layer node; and determining the identification of the first layer node as a determined identification. The method further includes: if the second layer node does not have a determined identification, re-transmitting the identification of the first layer node after a predetermined period of time has lapsed. Therefore, an automatically identification allocating method using a hierarchical structure can be adopted to enable a distributed management.