Passive IoT Terminal Inventory With Short Identifier Mapping
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Solution Overview
Problem
Passive IoT terminal devices face inefficiencies in inventorying processes due to the need for external excitation and the use of lengthy unique identifiers, leading to increased overheads, power consumption, and reduced success rates.
Innovation Solution
A communication method that assigns shorter identifiers to IoT terminal devices, allowing them to replace longer unique identifiers during inventory processes, reducing transmission overheads and duration, and optimizing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If longer unique identifiers are used for inventory, then identification accuracy is improved, but transmission overhead and duration increase
Solution Approach 1:
The patent divides the identification process into two segments: a shorter first identifier for rapid transmission and a longer second identifier for accurate identification. The system transmits the first identifier quickly, then retrieves or determines the corresponding second identifier, thereby reducing transmission duration while maintaining identification accuracy.
Solution Approach 2:
The patent introduces a correspondence relationship between the first identifier and the second identifier as an intermediary mechanism. This mapping allows the system to use the short first identifier as a proxy during transmission, while the actual identification is performed using the longer second identifier through the established correspondence.
2Measurement precision
If longer unique identifiers are used for inventory, then identification accuracy is improved, but power consumption increases
Solution Approach 1:
The patent segments the identifier usage into transmission phase (using short first identifier) and identification phase (using long second identifier). This segmentation reduces the energy required for transmission, which is the most energy-intensive operation, while maintaining accurate identification when needed.
Solution Approach 2:
The correspondence mapping serves as an intermediary that enables the system to avoid directly transmitting the energy-intensive long identifier. Instead, the system transmits the short identifier and uses the pre-established mapping to obtain the long identifier only when necessary for accurate identification.
3Loss of time
If shorter identifiers are used for inventory, then transmission overhead is reduced, but identification capability deteriorates
Solution Approach 1:
The patent introduces a correspondence relationship as an intermediary between the short first identifier and the long second identifier. This mapping mechanism ensures that even though the transmitted identifier is short, the full identification capability is preserved by retrieving or determining the corresponding long identifier through the established correspondence.
4Device complexity
If conventional inventory methods are used, then device complexity is maintained, but inventory efficiency deteriorates
Solution Approach 1:
The patent segments the identifier handling into transmission and identification functions. This segmentation improves inventory efficiency by optimizing each function separately: using short identifiers for fast transmission and long identifiers for accurate identification, without significantly increasing overall system complexity.
Data Source
AI summary
A communication method and apparatus are provided. The method is: A first network element sends a first request to an access network device to request to obtain identifiers of one or more terminal devices. The first network element may receive a first identifier from a first terminal device, and obtain a second identifier of the first terminal device based on the first identifier. The first identifier is an identifier that is assigned by the first network element or a second network element to the first terminal device and that corresponds to the second identifier or is an identifier that is preconfigured in the first terminal device and that corresponds to the second identifier. According to the method, the first terminal device may perform inventory by using the shorter first identifier, thereby improving efficiency and a speed of inventory.