Data Carrier Inventory With Segmented Transmission Parameters
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Solution Overview
Problem
Existing data carrier inventory methods set inventorized data carriers to a quiescent state, preventing further communication with the communication station, requiring a power-on reset to re-establish connectivity.
Innovation Solution
Data carriers are designed to generate a response signal using a predetermined transmission parameter different from those used for identification, allowing continued communication after inventory and enabling detection of their presence within the communication area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If data carriers are set to quiescent state after inventorization, then unambiguous reception of identification signals is achieved, but continuous communication with the communication station is lost
Solution Approach 1:
The patent segments the transmission parameters into two distinct groups: one set for identification signal transmission and another set for response signal transmission. This segmentation allows data carriers to differentiate between inventorization procedures and subsequent communication, enabling them to respond to acknowledgment commands without transmitting identification signals, thus maintaining communication capability while ensuring unambiguous identification signal reception.
2Ease of operation
If data carriers use the same transmission parameters for both identification and response signals, then communication is simplified, but collisions occur between identification signals from multiple data carriers
Solution Approach 1:
The patent divides transmission parameters into separate groups for identification signals and response signals. Data carriers select from the first group when transmitting identification signals and from the second group when transmitting response signals. This segmentation prevents collisions between identification signals from multiple data carriers while maintaining clear communication protocols.
3Use of energy by moving object
If data carriers remain in quiescent state after inventorization, then power consumption is reduced, but the need for power-on resets increases operational complexity
Solution Approach 1:
The patent implements a dynamic state management system where data carriers can transition between quiescent state and active response state. After inventorization, data carriers remain capable of receiving acknowledgment commands and switching to an active state to transmit response signals using predetermined transmission parameters, avoiding the need for complete power-on resets while managing power consumption efficiently.
Data Source
AI summary
In a method of inventorizing a plurality of data carriers (2) with the aid of a communication station (1) communicating in a contact-free way with the data carriers (2), a set (TS(1), TS(2), . . . TS(N), TS(N+1), . . . (TS(K)) of transmission parameters, preferably of time slots (TS) is available, which set comprises a first subset (TS(1) . . . TS(N)) and a second subset (TS(N+1) . . . (TS(K)) wherein inventorizing procedures (MP1, MP2, MP3, . . . ) are performed consecutively and wherein uninventorized data carriers (2) transmit their identification data (ID) to the communication station (1) for the purpose of inventorization only using transmission parameters contained in the first subset and wherein already inventorized data carriers (2) transmit their identification data (ID) to the communication station (1) only using transmission parameters contained in the second subset.