Sensor Device Dynamic Property Search Without Database
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Solution Overview
Problem
Conventional sensor networks face scalability issues and increased load on database systems when searching sensor nodes based on dynamic properties, such as temperature, due to the need for frequent updates and unnecessary processing by all sensor nodes, leading to inefficiencies and reduced real-time data accuracy.
Innovation Solution
A sensor device and relay device configuration that allows for flexible search of sensor devices based on dynamic properties without a database system, using channel addresses associated with measurement values, enabling only necessary processing and updates, and reducing network load by filtering unnecessary data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a database system is used to manage sensor node search, then search functionality is provided, but network load increases and scalability deteriorates due to frequent updates and unnecessary processing
Solution Approach 1:
The patent extracts the search functionality from the database system and implements it directly in sensor nodes through local address tables. Each sensor node maintains a table mapping measurement values to channel addresses, eliminating the need for centralized database queries and reducing network load while preserving search capabilities.
Solution Approach 2:
Sensor nodes perform self-management by maintaining local address tables and autonomously participating in relevant communication channels based on their measurement values. This self-service approach eliminates dependency on external database systems and reduces overall network load.
2Reliability
If all sensor nodes receive and process inquiry data, then comprehensive search coverage is achieved, but unnecessary processing increases network load and reduces efficiency
Solution Approach 1:
Each sensor node maintains a local address table with measurement-value-to-channel-address mappings specific to its capabilities and current state. This local quality allows nodes to independently determine relevance of inquiry data without requiring processing by all nodes, reducing network load while maintaining comprehensive search coverage.
Solution Approach 2:
Sensor nodes preliminarily organize their address information in local tables before receiving inquiry data. This pre-organization enables nodes to quickly filter and process only relevant inquiries based on their stored mapping relationships, avoiding unnecessary processing of unrelated data.
3Measurement precision
If dynamic property search is implemented, then real-time accuracy is improved, but database update frequency increases and system complexity rises
Solution Approach 1:
The patent extracts the dynamic property storage and mapping functionality from the database system and implements it locally in sensor nodes through address tables. This eliminates complex centralized database update mechanisms while maintaining real-time accuracy through local maintenance of measurement-value to channel-address mappings.
Data Source
AI summary
The sensor device having an address storage unit 107 storing a channel address to be used, a temperature sensor 103, a table storage unit 101 storing an address table in which a measurement value is associated with a channel address, and an address specification unit 102 specifying a channel address associated with a measured value obtained from the temperature sensor 103. The sensor device also including an address update unit 105 updating the channel address in the address storage unit 107, a judgment unit 108 judging whether or not inquiry data is directed to the channel address stored in the address storage unit 107, a response generation unit 106 generating response data which is a response to the inquiry data, and a communication unit 109 transmitting the response data to a retrieval node 120.