EP0282992A2
Expired / Lapsed
EP
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Method of controlling communication in an ID system
Assignee: Omron Corp
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Filing: 1988-03-16
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Granted: —
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Expires: 2008-03-16
Abstract
Abstract A memory (46) of a data carrier (40) attached to an article to be identified stores a classification code indicative of the data carrier's own communication protocol. Plural types of communication protocols are registered, in correspondence with the classification codes thereof, in the memory (24) of a controller (20) capable of communicating with the data carrier. Upon receiving a classification code transmitted by the data carrier, the controller selects from its memory a communication protocol indicated by the received classification code and then executes communication with the data carrier by using the selected communication protocol.
Inventors
- 👤 Kenji C/O Omron Tateisi Electronics Co Matsui
- 👤 Yasuo C/O Omron Tateisi Electronics Co Uchida
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 12:23
CPC Classifications
G; G06; G06K; G06K7/00; G06K7/10; G06K7/10009; G06K7/10297; G06K7/0008; Y; Y02; Y02P; Y02P90/00; Y02P90/02
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
143 words
A method of controlling communication in an ID system in which an exchange of data is carried out between a controller (20) and plural types of data carriers (40) having respective internal memories (46) and different communication protocols, said method comprising the steps of: previously registering the different types of communication protocols of the plurality of data carriers in a memory (24) of said controller in correspondence with classification information of the communication protocols; previously registering in the memory of each data carrier the classification information of its own communication protocol; causing said controller to receive classification information sent by a data carrier at the beginning of communication; causing said controller to select a corresponding communication protocol from its memory using the received classification information; and causing said controller to communicate with the corresponding data carrier in accordance with the selected communication protocol.
Claim 2
Independent Claim
143 words
A method of controlling communication in an ID system in which an exchange of data is carried out between a controller (20) and plural types of data carriers (40) having respective internal memories (46) and different communication protocols, said method comprising the steps of: previously registering the different types of communication protocols of the plurality of data carriers in a memory (24) of said controller in correspondence with classification information of the communication protocols; previously registering in the memory of each data carrier the classification information of its own communication protocol; causing said controller to receive classification information sent by a data carrier at the beginning of communication; causing said controller to select a corresponding communication protocol from its memory using the received classification information; and causing said controller to communicate with the corresponding data carrier in accordance with the selected communication protocol.
Claim 3
Dependent Claim
63 words
The method according to claim 1, wherein the data carrier is of a type supplied with operating power from said controller when the data carrier communicates with said controller; said controller initially resets the data carrier by turning the power supplied thereto from off to on; and said data carrier transmits communication protocol classification information to said controller when it is initially reset.
Claim 4
Dependent Claim
33 words
The method according to claim 1, wherein when the data carrier is initially reset, said data carrier transmits a synchronizing character signal before it transmits a signal representing the communication protocol classification information.
Claim 5
Dependent Claim
108 words
An ID system comprising a data carrier (40) attachable to an article to be identified; and a controller (20) which communicates with said data carrier; said data carrier having a memory (46) storing a classification code indicating its own communication protocol; said controller including: a memory (24) for previously storing plural types of communication protocols in correspondence with classification codes thereof; means (21) operative, when a classification code transmitted by said data carrier is received, for selecting in said memory (24) a communication protocol indicated by the classification code; and means (21, 23) for controlling execution of communication with said data carrier by using the selected communication protocol.
Claim 6
Dependent Claim
108 words
An ID system comprising a data carrier (40) attachable to an article to be identified; and a controller (20) which communicates with said data carrier; said data carrier having a memory (46) storing a classification code indicating its own communication protocol; said controller including: a memory (24) for previously storing plural types of communication protocols in correspondence with classification codes thereof; means (21) operative, when a classification code transmitted by said data carrier is received, for selecting in said memory (24) a communication protocol indicated by the classification code; and means (21, 23) for controlling execution of communication with said data carrier by using the selected communication protocol.
Claim 7
Dependent Claim
75 words
A data carrier (40) attachable to an article to be identified and capable of communicating with a controller (20), comprising: a memory (46) storing a classification code indicating its own communication protocol; and means (41, 47, 48) for transmitting a telegraphic message when initially reset, said telegraphic message including a synchronizing character used in order to decide a transmission speed in a communication with said controller, and a classification code read out of said memory.
Claim 8
Dependent Claim
75 words
A data carrier (40) attachable to an article to be identified and capable of communicating with a controller (20), comprising: a memory (46) storing a classification code indicating its own communication protocol; and means (41, 47, 48) for transmitting a telegraphic message when initially reset, said telegraphic message including a synchronizing character used in order to decide a transmission speed in a communication with said controller, and a classification code read out of said memory.
Claim 9
Dependent Claim
21 words
The data carrier according to claim 5, wherein said means for transmitting the telegraphic message includes a signal modulating circuit (41).
Claim 10
Dependent Claim
26 words
The data carrier according to claim 5, wherein said means for transmitting the telegraphic message includes a data encoding circuit (48) and a modulating circuit (41).
Claim 11
Dependent Claim
65 words
A controller (20) for communicating with a data carrier (40) attached to an article to be identified, comprising: means (21, 23, 30) for initially resetting the data carrier; means (30, 51) for receiving and demodulating a modulated synchronizing character signal sent by the data carrier when said data carrier is initially reset; and means (26, 21) for detecting signal transmission speed from the demodulated signal.
Claim 12
Dependent Claim
65 words
A controller (20) for communicating with a data carrier (40) attached to an article to be identified, comprising: means (21, 23, 30) for initially resetting the data carrier; means (30, 51) for receiving and demodulating a modulated synchronizing character signal sent by the data carrier when said data carrier is initially reset; and means (26, 21) for detecting signal transmission speed from the demodulated signal.
Claim 13
Dependent Claim
25 words
The controller according to claim 8, further comprising means (59) for producing and outputting a synchronizing clock signal on the basis of said demodulated signal.
Claim 14
Dependent Claim
92 words
The transmission speed detecting means in claim 8 comprising: a decoding circuit (52) for decoding the demodulated signal; an edge detecting circuit (54) for detecting a leading edge and a trailing edge of an output signal from said decoding circuit; a counter (56) which, from a moment it is reset, counts a pulse signal having a constant frequency, and which is reset by an edge detection output from said edge detecting circuit; and means (21) for computing transmission speed based on a counted value prevailing immediately prior to resetting of said counter.
References Cited (Backward Citations)
No citation records indexed.
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