Method for transmitting data between a read/write device and a data memory, use of the method in an identification system and a read/write device and mobile data memory for an identification system

• US 7,289,458 B2
• Filed: 03/31/2003
• Issued: 10/30/2007
• Est. Priority Date: 07/30/2001
• Status: Expired due to Fees

• Current Assignee: Siemens AG
• Original Assignee: Siemens AG
• Inventors: Gila, Janos, Rauscher, Kurt
• Primary Examiner(s): Pham; Chi
• Assistant Examiner(s): Hyun; Soon D.
• Application Number:
  US10/401,544
• Publication Number:
  US 20030214934A1
• Time in Patent Office: 1,674 Days
• Field of Search: None
• US Class Current: 370/278
• CPC Class Codes: G06K 17/0022 arrangements or provisious for transferring data to distant stations, e.g. from a sensing device "transfer between computer elements G06F13/00 "; data-transmission H04L
• CPC Class Codes: G06K 7/0008 General problems related to the reading of electronic memory record carriers, independent of its reading method, e.g. power transfer
• CPC Class Codes: G06K 7/10029 the collision being resolved in the time domain, e.g. using binary tree search or RFID responses allocated to a random time slot
• CPC Class Codes: G06K 7/10297 arrangements for handling protocols designed for non-contact record carriers such as RFIDs NFCs, e.g. ISO/IEC 14443 and 18092 cryptographic protocols H04L9/00; network security protocols H04L63/00; real-time communication protocols in data switching networks H04L65/00; network protocols for data switching network services H04L67/00

Abstract

A method for transmitting data between a read/write unit (SLG) and one or more mobile data stores (D, HD) in an identification system. The method includes dividing the data transmission occurring between the read/write unit (SLG) and the data stores (D, HD) into a plurality of timeslots (SLOT), subframes (SUBFRAME) and frames. An identification timeslot (S-CH) from the respective data store (D, HD) is received and evaluated in at least one evaluation timeslot (SOa) and the data store is identified as a mobile high-speed data store (HD) if the identification timeslot (S-CH) is a high-speed identification timeslot (S_31,0, S_0,31), and an associated data-store identifier block (MB2) is evaluated at least beginning during the subsequent timeslot after the identification timeslot (S-CH) onward. The method provides for very rapid detection of high-speed data stores (HD).

Claims

1. A method for transmitting data between at least one read/write unit and at least one mobile data store, the method comprising:

providing a plurality of successive time slots, each time slot representing a respective amount of time;

receiving at least one response sequence from one of the mobile data stores within at least two successive evaluation timeslots, each evaluation timeslot corresponding to a respective one of the plurality of timeslots, wherein each response sequence comprises at least one identification timeslot and a data-store identifier, and the identification timeslot comprises an identifier for evaluating the data-store identifier for a corresponding mobile data store at least from a subsequent timeslot onward,

detecting presence of the mobile data store based on said at least one identification timeslot; and

identifying the mobile data store based on the data-store identifier,

wherein said at least one identification timeslot and said data-store identifier are in one subframe.

2. The method as claimed in claim 1, further comprising:

combining a plurality of timeslots into a subframe; and

combining a plurality of subframes into a frame,

wherein each subframe is associated with a respective mobile data store.

3. The method as claimed in claim 1, wherein an identification timeslot from the corresponding mobile data store is received and evaluated by the read/write unit in at least one evaluation timeslot within a subframe.

4. The method as claimed claim 1, wherein the at least one identification timeslot is divided into two respective timeslot halves which are assigned revolving successive counter readings.

5. The method as claimed in claim 4, wherein at least one of the two timeslot halves with the counter readings within the identification timeslot identifies the mobile data store as a high-speed data store.

6. The method as claimed in claim 1, wherein reception and evaluation of the identification timeslot is preceded by the read/write unit transmitting a carrier signal to interrogate the corresponding contactable mobile data store.

7. The method as claimed in claim 1, wherein the data transmission method is a time division duplex TDD method.

8. The method as claimed in claim 1, wherein the data transmission method is a time division multiple access TDMA method.

9. The method as claimed in claim 1, wherein said at least one read/write unit receives the at least one response sequence from said one of the mobile data stores and identifies said one of the mobile data stores based on said at least one response sequence.

10. The method as claimed in claim 9, wherein the identification is in accordance with the ISO/IEC 18000 standard for operation in an ISM frequency band.

11. The method as claimed in claim 10, wherein the identification is in an ISM frequency band of 2.45 GHz.

12. The method as claimed in claim 10, wherein the identification is operated in an ISM frequency band of 5.6 GHz.

13. The method as claimed in claim 10, wherein the identification is operated in an ISM frequency band in the UHF frequency range.

14. The method as claimed in claim 1, wherein the at least one mobile data store comprises a high speed mobile data store and a slow speed mobile data store and wherein the read/write unit is configured to receive and evaluate a high-speed evaluation time slot transmitted by the high speed mobile data store and a slow-speed evaluation timeslot transmitted by the low speed mobile data store.

15. The method as claimed in claim 1, wherein:

the at least one timeslot comprises a fist timeslot and a second timeslot;

the first timeslot is designated in the read/write unit as a high-speed evaluation timeslot and the second timeslot is designated as a slow-speed evaluation timeslot;

a high-speed response sequence from the high-speed data store is cyclically transmitted, the high-speed response sequence comprises at least a high-speed identification timeslot configured to identify the high-speed sequence as originating from a high-speed data store, and a high-speed data store identifier block comprising an identification number configured to identify the high-speed data store from which the high-speed response sequence was transmitted;

a slow-speed response sequence from a slow-speed data store is cyclically transmitted; and

the slow-speed response sequence comprises at least a plurality of slow-speed identification timeslots configured to identify the slow-speed response sequence as originating from a slow-speed data store, and a slow-speed data store identifier block configured to identify the slow-speed data store from which the slow-speed response sequence was transmitted.

16. A device comprising:

a read/write unit to transmit data; and

at least one mobile data store to receive the transmitted data from said read/write unit and transmit a response,

wherein a plurality of successive time slots are provided, each time slot representing a respective amount of time and at least one response sequence from one of the at least one mobile data store is transmitted within at least two successive evaluation timeslots, each evaluation timeslot corresponding to a respective one of the plurality of timeslots, and wherein further, each response sequence comprises at least one identification timeslot and a data-store identifier, and the identification timeslot comprises an identifier for evaluating the data-store identifier for a corresponding mobile data store at least from a subsequent timeslot onward,

wherein presence of the mobile data store is detected based on said at least one identification timeslot and the mobile data store is identified based on the data-store identifier and wherein the at least one identification timeslot and the data-store identifier are provided in one subframe.

17. The device as claimed in claim 16, wherein:

the at least one timeslot comprises a fist timeslot and a second timeslot;

the first timeslot is designated in the read/write unit as a high-speed evaluation timeslot and the second timeslot is designated as a slow-speed evaluation timeslot;

a high-speed response sequence from the high-speed data store is cyclically transmitted, the high-speed response sequence comprises at least a high-speed identification timeslot configured to identify the high-speed sequence as originating from a high-speed data store, and a high-speed data store identifier block comprising an identification number configured to identify the high-speed data store from which the high-speed response sequence was transmitted;

a slow-speed response sequence from a slow-speed data store is cyclically transmitted; and

the slow-speed response sequence comprises at least a plurality of slow-speed identification timeslots configured to identify the slow-speed response sequence as originating from a slow-speed data store, and a slow-speed data store identifier block configured to identify the slow-speed data store from which the slow-speech response sequence was transmitted.

18. A method for transmitting data between a read/write unit and a high-speed data store, the method comprising:

providing a frame corresponding to an amount of time, the frame comprising a plurality of subframes, wherein each subframe comprises a plurality of successive timeslots;

designating at least one timeslot in the read/write unit as a high-speed evaluation timeslot;

cyclically transmitting a high-speed response sequence from the high-speed data store, wherein the high-speed response sequence comprises at least a high-speed identification timeslot to identify the high-speed sequence as originating from a high-speed data store, and a high-speed data store identifier block comprising an identification number to identify the high-speed data store from which the high-speed response sequence was transmitted;

identifying, during one of the at least one high-speed evaluation timeslots, the high-speed identification timeslot transmitted from the read/write unit;

identifying the high-speed data store from which the high-speed response sequence was transmitted at least during a timeslot immediately subsequent to a transient timeslot, wherein the transient timeslot is immediately subsequent to the high-speed identification timeslot;

designating the first timeslot of a subframe as a slow-speed evaluation timeslot; and

cyclically transmitting a slow-speed response sequence from a slow-speed data store, wherein the slow-speed response sequence comprises at least a plurality of slow-speed identification timeslots configured to identify the slow-speed response sequence as originating from a slow-speed data store, and a slow-speed data store identifier block configured to identify the slow-speed data store from which the slow-speed response sequence was transmitted.

19. A method as claimed in claim 18, wherein said identifying the high-speed identification timeslot and said identifying the high-speed data store from which the high-speed response sequence was transmitted occurs within a single subframe.

20. A method as claimed in claim 18 wherein the slow-speed identification timeslots and the slow-speed data store identifier block occur in separate subframes.