Wireless Tag Communication Using Flag States for Location Detection
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Solution Overview
Problem
Existing RFID systems face inefficiencies in reading identification information from multiple tags due to repeated reading of already detected tags, leading to increased time and reduced reading rates, especially in applications requiring location detection of items in large inventories.
Innovation Solution
A wireless tag communication apparatus that utilizes a processor to manage flag states of RFID tags, ensuring only undetected tags are read by specifying flag states and preventing redundant readings, thereby optimizing the reading process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the wireless tag communication apparatus sends the reading command multiple times to read identification information from all wireless tags, then the identification information can be read from more tags, but the time to complete reading increases and the reading rate per unit time decreases
Solution Approach 1:
The patent applies preliminary action by setting the flag to the first state before sending reading commands, which pre-prepares the tag system to respond only to unread tags. This prevents redundant readings from the outset and improves reading efficiency without requiring multiple passes through all tags.
Solution Approach 2:
The patent implements feedback by using the flag state as a mechanism that provides information about which tags have been read. The flag transitions from the first state to the second state after reading, creating a feedback loop that allows the reading apparatus to identify and prioritize unread tags in subsequent reading operations, thereby reducing total reading time.
2Productivity
If the wireless tag communication apparatus reads a wireless tag whose location has already been detected, then the reading operation can be completed, but the opportunity to read wireless tags whose locations have not been detected yet is reduced
Solution Approach 1:
The patent applies preliminary action by pre-setting the flag to the first state for all tags before beginning the reading process. This ensures that the reading apparatus prioritizes unread tags from the beginning, maximizing the detection of new tags while maintaining high reading efficiency. The flag mechanism is prepared in advance to guide the reading sequence optimally.
Solution Approach 2:
The patent implements feedback through the flag state mechanism that continuously informs the reading apparatus which tags have been detected. This feedback allows the system to dynamically adjust its reading focus toward unread tags, ensuring both high reading rates and complete location detection coverage by preventing redundant readings of already-detected tags.
Data Source
AI summary
In accordance with an embodiment, a wireless tag communication apparatus causes a reading command specifying a first state as a flag state to be sent, to thereby acquire identification information of a wireless tag in the first state. In a case where the wireless tag communication apparatus determines the wireless tag that is a detection target whose location has not been detected as the wireless tag that is a reading target on the basis of the identification information, the wireless tag communication apparatus causes the flag state of the determined wireless tag to be rewritten from the first state to the second state. The wireless tag communication apparatus causes identification information reading command specifying a second state as the flag state to be sent, to thereby acquire the identification information only from the wireless tag that is the reading target in the second state.