EP1320797A4 - Faisceau continu (systeme de transfert de donnees par faisceau continu) - Google Patents

Faisceau continu (systeme de transfert de donnees par faisceau continu)

Info

Publication number
EP1320797A4
EP1320797A4 EP01978688A EP01978688A EP1320797A4 EP 1320797 A4 EP1320797 A4 EP 1320797A4 EP 01978688 A EP01978688 A EP 01978688A EP 01978688 A EP01978688 A EP 01978688A EP 1320797 A4 EP1320797 A4 EP 1320797A4
Authority
EP
European Patent Office
Prior art keywords
data
compliant
remote device
continuous
beaming
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP01978688A
Other languages
German (de)
English (en)
Other versions
EP1320797A2 (fr
Inventor
Chiang-Lung Huang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP1320797A2 publication Critical patent/EP1320797A2/fr
Publication of EP1320797A4 publication Critical patent/EP1320797A4/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
    • H04B10/114—Indoor or close-range type systems

Definitions

  • the present invention relates to data interchange between computers and, more particularly, to a method for continuous, wireless, data transmission from one source device to another.
  • Wireless communication is playing an increasingly important role in computer data interchange, particularly for users of mobile computers. This is because it is often necessary to transfer specific data while traveling, when there is no access to conventional telephone lines or other hard- wired means of data transfer.
  • wireless data communications There are several media for wireless data communications. Infrared optical energy, based on the IrDA and IrOBEX protocols, is one well-known exemplary medium for wireless data communications. See, J.M. Kahn and J.R. Barry,
  • Bluetooth wireless technology based on Bluetooth Object Push Profile, is another exemplary medium. Bluetooth is an open standard for short-range wireless communication between devices over the publicly available radio spectrum, eliminating the need to employ connecting cables and to point to a device.
  • the preferred infrared communication requires a point-to-point or multipoint communication link via either fiber optic cable or direct free-space aimed transmission.
  • Direct free-space transmissions require a substantially straight line path between a transmitter and receiver which is transparent to the communications media.
  • An example of such a direct free space transmission is remote control of a television. The remote control unit must be aimed at the receiver of the television in order to activate any kind of control.
  • Direct free-space transmission links are becoming more common, and this is reflected by the fact that many computer hardware and peripheral makers now integrate infrared (“IR”) devices into their computers, printers, organizers, phones, watches, etc.
  • IR infrared
  • Conventional application software that governs the infrared ports in such devices allows predefined data to be transmitted from a source to a compatible receiver tlirough the IR ports of the two.
  • This IR transmission application software is especially useful in the context of personal digital assistants ("PDA"s), which are generally designed for fast and efficient distribution of any information anywhere.
  • PDA personal digital assistants
  • US5889604 shows a method of and apparatus for infrared data communications between portable information terminals that purports to save battery power by evaluating the data bits to be transmitted and inverting them if the inverted bit stream would require less energy to transmit.
  • US Patent No. 4977618 shows a diffuse infrared data communications method for wireless communications of information between two locations. The infrared radiation is transmitted to a reflecting surface which redirects the beam to a receiver.
  • Extended Software® provides an IR management program called QuickBeam® for transferring file(s) between computers that allows portables to automatically detect and connect to each other.
  • the program itself is simple and intuitive, it allows the transfer of files and folders with just a single instruction from the operator.
  • the application enables transfer of a 1 Mb file in only 10 seconds, and it meets IrDA object exchange (OBEX) standards.
  • OBEX IrDA object exchange
  • the source device or beaming station, is configured through the continuous data
  • a remote target device if the data transfer is interrupted or finished, thereby it effectively achieves one-touch wireless synchronization.
  • the method begins with a Host Device, which checks the HotSync schedule
  • HotSyncs to the server, updates the files.
  • the Host Device searches to find an IrOBEX or Bluetooth Object Push Profile compliant
  • the Host Device completes the connection to the Remote
  • This system is particularly convenient when the BeamCast device is in a locked and secured beaming kiosk because there is no need to physically open the kiosk to replace the beaming host device with a new file or object to beam.
  • the BeamMaster software updates the data files or objects, e.g., daily updates for shows or events, remotely, with no visible interruptions, except for the minimal interruption when BeamMaster halts the system and updates the contents.
  • FIG. 1 is a conceptual diagram of the system according to the present invention.
  • FIG. 2 is a conceptual diagram of an IrDA transport stack
  • FIG. 3 is a flow-chart depiction illustrating the method steps of the present invention.
  • FIG. 3.1 through 3.9 are exemplary source code of the method for continuous, wireless, infrared data transmission from a Host Device to a Remote Device, written in the "C" programming language.
  • the preferred embodiment of the present invention is a method and software application of the method for continuous, wireless, infrared data transmission from a Host Device to a Remote Device.
  • both Host Device and Remote Device must be IrDA compliant to perform wireless communication.
  • IrDA is an International Organization that creates and promotes interoperable, low cost infrared data interconnection standards that support a walk-up, point-to-point user model. The standards support a broad range of appliances, computing and communications devices.
  • the present invention is hardware and platform independent, for example, data can be transmitted through the IR port or other computer systems and peripherals from the following platforms: Unix, Linux, Windows-based (including Windows CE), Embedded Systems, Palm handhelds, etc.
  • the data can be beamed to any of the following exemplary receiver devices: watches, cell phones, palm handhelds, etc.
  • the application finds great utility with multiple purpose hand-held devices for fast data
  • This capability provides a
  • FIG. 1 is an exemplary conceptual diagram of the system according to the present invention.
  • a laptop computer is the IrDA or IrOBEX compliant Host
  • PDA personal digital assistant
  • Remote Device 20 Both are equipped with conventional infrared ports such as, for example
  • Both Host Device 10 and Remote Device 20 are also equipped with a standard IrDA transport stack and the optional IrOBEX Data Protocol. As seen in
  • the IrDA transport stack comprises a series of protocols arranged as a stack
  • IrDA link access
  • IrLAP Infrared Link Access Protocol
  • IrLAP Infrared Link Access Protocol
  • IrLAP constitutes one layer in this hierarchical stack of communication protocol layers. It uses
  • the Upper Layer and "The Service User (Layer)" IrLAP uses four
  • IrLMP Infrared Link Management Protocol
  • the protocol provides support for
  • IrTTP Infrared Tiny Transportation Protocol
  • the IrDA Physical Layer (Physical Layer) comprises the electrical-optical
  • the IrOBEX protocol is an optional IrDA protocol and provides object exchange services similar to HTTP.
  • the foregoing protocols are exemplary of data transmission protocols upon which the Continuous Data Beaming method and application of the present invention may rely.
  • FIG. 3 is a flow-chart depiction illustrating the method steps of the present
  • step 100 begins at step 100 (Start) as the user applies power to any two
  • IrOBEX compliant devices at least one of which (the Host Device) uploads the Continuous Data Beaming software of the present invention as a memory resident program.
  • the software may be written in "C" programming language.
  • the Host Device reads a table of the HotSync schedule to determine if it is time to HotSync to the server; e.g. a database server or Web server.
  • HotSync is a PalmOS® procedure that synchronizes files and/or data objects between a data server and a Palm device. If, at step 120, the current time equals the update time, the system performs a HotSync to the server at step 130, obtains the necessary file or data object and begins again at step 100. If the current time does not equal the time to update, the system goes to step 140.
  • the Host Device begins searching for another IrOBEX compliant device.
  • the search of the IrDA compliant device is accomplished by an Ir Discovery function.
  • the implementing source code for Step 140 and the IrDiscovery function can be found at FIG. 3.1.
  • IrDiscover sends an IrDiscover Request which starts an IrLMP discovery process.
  • the Host Device starts searching for any potential receiver or target IrOBEX compliant device within the IR communication range and that is operative. If there is an IrOBEX compliant device within the range, it will respond with device characteristics back to the requestor.
  • the implementing source code for this function of Step 140 can be
  • the Host Unit has found an IrOBEX compliant receiver or
  • the Host Device checks the availability for connection. The check for availability is accomplished
  • ClientCallBack Protocol can be found at FIG. 3.3. This call back function handles
  • the method returns to step 110 and the Host device checks for scheduled HotSync times.
  • Step 150 can be found at FIG. 3.4 (entitled PrvConfirmState).
  • the PrvConfirmState function simply confirms that the state is the desired state or not.
  • a BeamMaster target device is a
  • Step 160 and the DmFind Database function can be found at FIG. 3.5. If the target device is a BeamMaster device, the continuous beaming is halted for a maximum of thirty seconds to enable the swapping of files or data objects, at step 170. The implementing source code for Step 170 and the kTargerSuperUSer function can be found at FIG. 3.2. If thirty seconds has not expired or the data transfer is not interrupted at step 180, the files or data objects are transferred and successfully swapped at step 190 and the beaming continues at step 100.
  • the Host Device tries to initiate a connection to the regular user Remote Device at step 200 by relying on the above-described IrLMP (Infrared Link Management Protocol) which supports walk-up, ad hoc connection between IrOBEX devices.
  • IrLMP Infrared Link Management Protocol
  • the implementing source code for Step 200 and the IrDiscovery function can be found at FIG. 3.1. This layer of the protocol stack allows software on one device to discover the services available on another device.
  • step 210 If the connection is not successful at step 210, the program returns to step 110 and the Host Device starts to check the HotSync schedule for HotSync times again.
  • IrLAP Infrared Link Access Protocol
  • the Continuous Infrared Data Beaming application of the present invention manages the IrLAP protocol with four primary functions: The first is WriteDBData, which is a call back function for ExgDB Write to send data.
  • the ExgDB Write function reads a given Palm OS database in its internal format from the local device and writes it out using a function supplied.
  • this function might read a local database and transmit it by a beaming operation using the exchange manager.
  • the implementing source code for Step 210 and the WriteDBData function can be found at FIG. 3.6.
  • the Beamlt function sends an application or database.
  • the implementing source code for Step 210 and the Beamlt function can be found at FIG. 3.7.
  • the SendDatabase function sends data in the input field.
  • the implementing source code for Step 210 and the SendDatabase function can be found at FIG. 3.8.
  • the PrvTextCallback function is a callback function that displays text and icons showing the current progress state.
  • the implementing source code for Step 210 and the PRvTextCallback function can be found at FIG. 3.9.
  • the data object starts transferring through the Infrared ports at step 220.
  • the selected data object is transferred as a simple IrOBEX transfer. More specifically, the data object is transferred via the IrTTP (Infrared Tiny Transportation Protocol) which provides an independently flow-controlled transport connection, segmentation and reassembly. No packet compression is needed.
  • IrTTP Infrared Tiny Transportation Protocol
  • the transmission is monitored at step 230 for transmit errors or interruptions, and if the data object has been transferred successfully through the Infrared ports at step 220 the event is recorded in a Record Transmit Log at step 230
  • step 110 the Host Device checks for scheduled HotSync times again.
  • the Continuous Data Beaming System is unique in the manner by which it
  • a BeamMaster Remote Device can interrupt this continuous
  • Bluetooth is an open standard for short-range wireless communication between devices over the publicly available radio
  • the present invention will continuously beam data through the radio spectrum using the Bluetooth protocol.
  • a microchip, incorporating a radio transceiver, is built into the digital
  • the radio operates in a globally available frequency band, ensuring
  • Bluetooth comprises components, including the radio, baseband, link manager, service discovery protocol, transport layer, and interoperability with different communication protocols.
  • Wireless communication is playing an increasingly important role in computer data interchange, particularly for users of mobile computers. This is because it is often necessary to transfer specific data while traveling, when there is no access to conventional telephone lines or other hard- wired means of data transfer.
  • Infrared optical energy based on the IrOBEX protocol
  • Bluetooth wireless technology based on Bluetooth Object Push Profile

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Optical Communication System (AREA)

Abstract

L'invention concerne un système de transfert de données par faisceau continu, qui peut envoyer des données de façon continue et automatique par transmission directe d'un dispositif hôte (dispositif source ou 'station d'envoi') à un autre dispositif éloigné (récepteur) chaque fois que ce dernier demande les données. Le dispositif hôte cherche en permanence à localiser un dispositif éloigné fonctionnant selon la norme IrOBEX, vérifie la disponibilité d'une connexion infrarouge, met en oeuvre la connexion avec le dispositif éloigné, et transfère un objet de données par le biais des ports infrarouges respectifs. Si une panne survient durant une des étapes précédentes, le programme retourne automatiquement à la procédure d'interrogation. L'opération s'effectue dans une boucle infinie, ce qui assure une transmission de données infrarouge continue, sans fil. Pendant la transmission continue, aucun dispositif éloigné autre que le 'BeamMaster' ne peut interrompre le transfert continu. Le dispositif 'BeamMaster' permet au système de faire une courte pause. Le 'BeamMaster' permet au système de s'arrêter pendant un court laps de temps d'au plus trente secondes, de sorte que des fichiers ou des objets de données puissent être échangés. Le transfert par faisceau continu reprend une fois les fichiers échangés ou le délai expiré. Le dispositif hôte transmet automatiquement des données au récepteur chaque fois qu'un récepteur se manifeste et demande des données, d'où la réalisation effective d'une synchronisation sans fil par touche unique.
EP01978688A 2000-09-27 2001-08-01 Faisceau continu (systeme de transfert de donnees par faisceau continu) Withdrawn EP1320797A4 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US23575100P 2000-09-27 2000-09-27
US235751P 2000-09-27
PCT/IB2001/001708 WO2002027422A2 (fr) 2000-09-27 2001-08-01 Faisceau continu (systeme de transfert de donnees par faisceau continu)

Publications (2)

Publication Number Publication Date
EP1320797A2 EP1320797A2 (fr) 2003-06-25
EP1320797A4 true EP1320797A4 (fr) 2004-03-17

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EP01978688A Withdrawn EP1320797A4 (fr) 2000-09-27 2001-08-01 Faisceau continu (systeme de transfert de donnees par faisceau continu)

Country Status (2)

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WO (1) WO2002027422A2 (fr)

Families Citing this family (1)

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Publication number Priority date Publication date Assignee Title
US7775432B2 (en) 2003-10-16 2010-08-17 Nokia Corporation Terminal, method and computer program product for interacting with a signaling tag

Citations (2)

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Publication number Priority date Publication date Assignee Title
EP0917077A2 (fr) * 1997-11-18 1999-05-19 Lucent Technologies Inc. Synchronisation sans fil éloignée entre PC et PDA
US6088730A (en) * 1997-06-02 2000-07-11 International Business Machines Corporation Methods and apparatus for downloading data between an information processing device and an external device via a wireless communications technique

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US6343313B1 (en) * 1996-03-26 2002-01-29 Pixion, Inc. Computer conferencing system with real-time multipoint, multi-speed, multi-stream scalability
CA2179349C (fr) * 1996-06-18 2000-01-11 Roger Yiu Ming Cheung Methode et appareil pour etablir une connexion a 3 voies entre un dispositif informatique mobile, un dispositif informatique stationnaire et un reseau informatique
US6070199A (en) * 1996-11-13 2000-05-30 Extended Systems, Inc. Apparatus to connect a client computer to a computer data network
US5995965A (en) * 1996-11-18 1999-11-30 Humetrix, Inc. System and method for remotely accessing user data records
US6272545B1 (en) * 1997-10-24 2001-08-07 Microsoft Corporation System and method for interaction between one or more desktop computers and one or more mobile devices
US20020026321A1 (en) * 1999-02-26 2002-02-28 Sadeg M. Faris Internet-based system and method for fairly and securely enabling timed-constrained competition using globally time-sychronized client subsystems and information servers having microsecond client-event resolution

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US6088730A (en) * 1997-06-02 2000-07-11 International Business Machines Corporation Methods and apparatus for downloading data between an information processing device and an external device via a wireless communications technique
EP0917077A2 (fr) * 1997-11-18 1999-05-19 Lucent Technologies Inc. Synchronisation sans fil éloignée entre PC et PDA

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WILLIAMS T ET AL: "Serial Infrared Link Access Protocol (IrLAP)", INFRARED DATA ASSOCIATION LINK MANAGEMENT PROTOCOL, XX, XX, PAGE(S) 1-116, XP002146280 *

Also Published As

Publication number Publication date
EP1320797A2 (fr) 2003-06-25
WO2002027422A2 (fr) 2002-04-04
WO2002027422A3 (fr) 2002-08-15

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