TDMA CONTROL METHOD USED BY RFID READER VIA MOBILE PHONE BASE STATION AND MOBILE RFID READER

• US 20100207737A1
• Filed: 10/13/2008
• Published: 08/19/2010
• Est. Priority Date: 10/12/2007
• Status: Abandoned Application

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: Park, Chan-Won, Seong, Nak-Seon, Chae, Jong-Suk, Choi, Gil-Young, Pyo, Cheol-Sig, Tschische, David, Preishuber-Pfluegl, Josef
• Application Number:
  US12/682,319
• Publication Number:
  US 20100207737A1
• Time in Patent Office: Days
• US Class Current: 340/10.200
• 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 7/10475 arrangements to facilitate interaction with further interrogation devices, e.g. such that at least two interrogation devices may function and cooperate in a network of such devices
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 72/541 using the level of interference
• CPC Class Codes: H04W 74/006 in the downlink, i.e. towards the terminal
• CPC Class Codes: H04W 74/0833 Random access procedures, e.g. with 4-step access

Abstract

A time division multiple access (TDMA) control method used by a mobile radio frequency identifier (RFID) reader through a mobile phone base station and a mobile RFID reader are provided. Each mobile RFID reader occupies a frequency channel during a time slot allocated through a mobile communication base station, thereby avoiding interference between readers.

Claims

1. A time division multiple access (TDMA) control method used by a mobile radio frequency identifier (RFID) reader, the method comprising:

requesting a channel used to perform an RFID communication with a tag via an uplink channel for a base transceiver station according to a protocol of a corresponding mobile communication network; and

receiving at least one piece of channel information among a transmission channel and a transmission window via a downlink channel from the base transceiver station according to the protocol of the corresponding mobile communication network.

2. The method of claim 1, wherein the transmission window includes information about the number and location of time slots.

3. The method of claim 2, wherein the time slots are generated based on a system clock synchronized to a specific pattern of a frame broadcasted by the base transceiver station.

4. The method of claim 1, further comprising:

transmitting historic information collected during an inventory round to the base transceiver station after the inventory round ends.

5. The method of claim 1, further comprising:

exchanging the at least one piece of channel information with another mobile RFID reader.

6. The method of claim 1, wherein the mobile communication network comprises a global system for mobile communication (GSM) network, an universal mobile telecommunications system (UMTS) network, a code division multiple access (CDMA) network, and a wideband-CDMA (W-CDMA) network.

7. A TDMA control method used by a mobile RFID reader, the method comprising:

requesting a channel used to perform an RFID communication with a tag via an random access channel (RACH) for a base transceiver station that covers a mobile communication network cell to which a specific frequency spectrum is allocated; and

receiving at least one piece of channel information among a transmission channel and a transmission window via an access grant channel (AGCH) from the base transceiver station.

8. The method of claim 7, wherein the transmission window includes information about the number and location of time slots.

9. The method of claim 8, wherein the time slots are generated based on a system clock synchronized to a specific pattern of a burst frame received via a broadcast control channel from the base transceiver station.

10. The method of claim 7, further comprising:

transmitting historic information collected during an inventory round to the base transceiver station via the RACH after the inventory round ends.

11. A TDMA control method used by a mobile RFID reader by using a base transceiver station, the method comprising:

receiving a request of the mobile RFID reader for a channel used to perform an RFID communication with a tag via an uplink channel according to a protocol of a corresponding mobile communication network; and

allocating at least one piece of channel information among a transmission channel and a transmission window via a downlink channel according to the protocol of the corresponding mobile communication network in response to the request.

12. The method of claim 11, wherein the transmission window includes information about the number and location of time slots.

13. The method of claim 11, wherein the base transceiver station manages cells of a region to which a part of a frequency spectrum covered by the mobile communication network is allocated.

14. The method of claim 11, wherein the mobile communication network comprises a GSM network, an UMTS network, a CDMA network, and a W-CDMA network.

15. A mobile RFID reader comprising:

a mobile communicating unit requesting a channel used to perform an RFID communication via an uplink channel for a base transceiver station according to a protocol of a corresponding mobile communication network, and receiving at least one piece of channel information among a transmission channel and a transmission window via a downlink channel from the base transceiver station according to the protocol of the corresponding mobile communication network; and

an RFID reader unit performing the RFID communication with a tag based on the at least one piece of channel information.

16. The mobile RFID reader of claim 15, wherein the transmission window includes information about the number and location of time slots.

17. The mobile RFID reader of claim 16, wherein the RFID reader unit generates time slots based on a system clock synchronized to a specific pattern of a frame broadcasted by the base transceiver station.

18. The mobile RFID reader of claim 15, wherein the mobile communication network comprises a GSM network, an UMTS network, a CDMA network, and a W-CDMA network.

19. A mobile RFID communication system comprising:

a mobile communication network base station allocating at least one piece of channel information among an RFID transmission channel and an RFID transmission window via a channel according to a protocol of a network; and

a mobile station comprising an RFID reader, generating time slots based on a specific pattern of a burst frame broadcasted by the base station, and performing an RFID communication with a tag during a designated time slot in a frequency allocated in response to the request of the channel information.

20. The mobile RFID communication system of claim 19, wherein the mobile communication network comprises a GSM network, an UMTS network, a CDMA network, and a W-CDMA network.