Passive IoT Tag State Management Through Network-Assisted Inventory
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The passive internet of things (IoT) devices, such as passive and semi-passive tags, face limitations in communication distance and complex state management due to reliance on external excitation from a reader/writer, hindering large-scale deployment.
Innovation Solution
A tag state management method that integrates inventory capabilities into an access network device, enabling tags to switch states efficiently using air interface wireless technology, with simplified packet headers for communication, and utilizing timers for state maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If tags rely on external excitation from reader/writer, then tags can function with simple structure, but communication distance is limited
Solution Approach 1:
The access network device acts as an intermediary between the tag and the core network. It receives inventory requests from the core network, excites the passive tag using air interface wireless technology, and manages the registration state of the tag. This intermediary approach enables extended communication distance while keeping the tag structure simple.
2Ease of operation
If tags use conventional state management, then state tracking is comprehensive, but state management becomes complex
Solution Approach 1:
The patent simplifies tag state management by defining distinct state conditions (registered state and deregistered state) with specific local characteristics. The access network device manages these states locally, switching between them based on registration status. This localized state management approach maintains reliability while significantly simplifying operations.
3Adaptability or versatility
If access network device integrates inventory capability, then unified management is achieved, but system complexity increases
Solution Approach 1:
The access network device is designed with multi-functionality, integrating both air interface wireless communication and inventory management capabilities. It can excite tags, manage registration states, and communicate with the core network, enabling unified management of passive IoT tags across different scenarios without requiring separate dedicated devices.
Data Source
AI summary
This application provides a tag state management method and a communication apparatus. The method includes: A first tag receives a first message from an access network device, where the first message is used to request to inventory a to-be-inventoried tag, and the first tag belongs to the to-be-inventoried tag. The first tag accesses the access network device. The first tag sends a second message, where the second message is used to request registration with a core network device. The first tag switches from a deregistered state to a registered state after sending the second message. According to the method, after the second message is sent, a state of the first tag is switched from the deregistered state to the registered state, to properly manage the state of the tag in a scenario in which the tag is inventoried by using an air interface wireless technology.