Wireless Tag Response Format Assignment to Prevent Redundant Reads
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Solution Overview
Problem
In situations where multiple reading devices are used, wireless tags can transmit response waves that are received and processed redundantly by devices farther away, leading to inefficient and redundant processing.
Innovation Solution
A wireless tag reading system with a management device that assigns unique response formats to each reading device, preventing redundant reading by instructing wireless tags to transmit in specific formats based on the assigned settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple reading devices are used to read wireless tags, then the coverage area and reading capability are improved, but redundant reading and processing occur when tags are within range of multiple devices
Solution Approach 1:
The system segments the reading space by assigning different response formats to different reading devices. Each device is given a unique identifier that becomes part of the response format, creating distinct reading zones or domains. When a tag receives requests from multiple devices, it can identify which device's format to respond to based on the request format, effectively segmenting the coverage area to prevent redundant processing.
Solution Approach 2:
The system applies local quality by customizing the response format for each reading device based on its specific identifier. Instead of using a uniform response format across all devices, each device receives a tailored response format that includes its unique characteristics. This allows tags to differentiate between devices and respond appropriately, eliminating redundant readings while maintaining comprehensive coverage.
2Ease of operation
If reading devices use the same response format, then compatibility and ease of operation are improved, but redundant reading occurs when devices are close to each other
Solution Approach 1:
The system changes the response format parameters dynamically based on the reading device's identifier. Instead of maintaining a fixed uniform format, the response format parameters (such as modulation type, data structure, or timing characteristics) are adjusted to include device-specific information. This allows the system to maintain operational simplicity through automated format assignment while ensuring reading accuracy by preventing redundant processing of the same tag by multiple devices.
3Reliability
If wireless tags transmit response waves to all reading devices, then communication reliability is improved, but redundant processing and energy consumption increase
Solution Approach 1:
The system performs preliminary action by pre-configuring response formats for each reading device before actual reading operations begin. The management device assigns specific response formats to each reading device based on their identifiers and spatial relationships. This preliminary setup enables tags to efficiently determine which device requests to respond to, avoiding unnecessary transmission energy consumption while maintaining communication reliability through pre-established format agreements.
Data Source
AI summary
A wireless tag reading system includes wireless tag reading devices each configured to, when communicating with a wireless tag, instruct the wireless tag to transmit a response wave in a certain response format, and a management device including: a network interface configured to communicate with the reading devices, a memory that stores setting data that associates each of the reading devices with a different response format, and a processor configured to: upon receipt of a notification from a first reading device, search the memory for a first response format corresponding to the first reading device, and control the network interface to transmit, to the first reading device, information indicating the first response format. The first reading device, when communicating with a wireless tag, instructs the wireless tag to transmit a response wave in the first response format.