WO2012121641A1 - Échange sans fil à courte distance d'informations de charge utile - Google Patents

Échange sans fil à courte distance d'informations de charge utile Download PDF

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Publication number
WO2012121641A1
WO2012121641A1 PCT/SE2012/000024 SE2012000024W WO2012121641A1 WO 2012121641 A1 WO2012121641 A1 WO 2012121641A1 SE 2012000024 W SE2012000024 W SE 2012000024W WO 2012121641 A1 WO2012121641 A1 WO 2012121641A1
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WO
WIPO (PCT)
Prior art keywords
signal
wireless
payload information
exchange
operatively
Prior art date
Application number
PCT/SE2012/000024
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English (en)
Inventor
Thomas EKHOLM
Original Assignee
Thomas EKHOLM
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 Thomas EKHOLM filed Critical Thomas EKHOLM
Publication of WO2012121641A1 publication Critical patent/WO2012121641A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/14—Direct-mode setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
    • H04L63/0428—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
    • H04L63/0492—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload by using a location-limited connection, e.g. near-field communication or limited proximity of entities
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/005—Discovery of network devices, e.g. terminals

Definitions

  • This disclosure relates to a method, a system and a portable wireless communication device for wireless exchange of payload information initiated at a short distance.
  • the first device is selected and/or identified in the second device, and that the second device is selected and/or identified in the first device, or that at least one of the devices is selected and/or identified in the other device.
  • images captured by a digital still camera are frequently transferred from the memory in the camera to a computer or similar. This may require that the camera is selected by being connected to the computer. This may also require that the camera is identified in the computer.
  • the memory in the camera may have to be identified as a hard disk drive or similar in the computer.
  • a wireless network is used to transfer information between a first wireless communication device and a second wireless communication device
  • the wireless network may e.g. be a Wireless Local Area Network (WLAN), e.g. based on the IEEE 802.11.
  • WLAN Wireless Local Area Network
  • a transfer of information between the first and the second wireless device may require that each of the wireless devices selects and connects to the wireless network, e.g. selects the proper network name, e.g. given by the Service Set Identifier (SSID) or similar).
  • SSID Service Set Identifier
  • the above is merely examples of the general need for selecting and/or identifying the electronic devices involved in an information exchange. Typically, the selection and/or identification of the devices are done manually by the user of the device in question. This takes time and it requires a level of knowledge on the part of the user. Thus, it is not a fully trivial matter to select and/or identify the electronic devices to be involved in an information exchange.
  • the location of the image-files to be transferred may have to be identified.
  • the location may e.g. be a file folder in the memory if the camera appearing as a hard disk drive on the computer to which the camera is connected.
  • the image-files in the identified location of the memory may have to be selected. This may require that the user clicks or otherwise marks the relevant image-files in the identified folder.
  • a similar need for identifying and/or selecting the payload information is also present when information is exchanged between wireless devices connected to a wireless network as discussed above.
  • the above is merely examples of the general need for identifying and/or selecting the payload information to be exchanged between two electronic devices.
  • the identification and/or selection of the payload information to be exchanged is done manually by the user of the device in question. This takes time and it requires a level of knowledge on the part of the user. Thus, it is not a fully trivial matter to select and/or identify the payload information to be exchanged between two devices.
  • the improved scheme should make it easy for a user of a wireless communication device to distinctly select and/or identify another wireless communication device with which payload information is to be exclusively exchanged. It is also preferred that the improved scheme makes it easy for a user of a wireless communication device to identify and/or select the payload information to be exchanged. At least one of the drawbacks mentioned above has been eliminated or reduced by an embodiment of the present solution directed to a method of exchanging payload information between a portable first wireless communication device and a second wireless communication device.
  • the method comprises the actions of: moving the first device close to the second wireless device while wireless transmission is disabled in the first device; activating the second device to transmit a second wireless signal and to receive a first wireless signal transmitted from the first device, and simultaneously activating the first device by the user at the exchange of payload information to transmit the first signal and to receive the second signal transmitted by the second device; establishing an exclusive wireless communication and exchanging payload information exclusively between the first device and the second device, provided that the second signal is the strongest wireless signal received by the first device and that the second device is accessible to the first device, and provided that the first signal is the strongest wireless signal received by the second device and that the first device is accessible to the second device.
  • a wireless communication system comprising a portable first wireless communication device and a second wireless communication device configured to operatively exchange payload information between each other.
  • the first device is configured to operatively disable wireless communication until the exchange of payload information between the first device and the second device.
  • the second device is configured to be activated to transmit a second wireless signal and to receive a first wireless signal transmitted from the first device, and the first device is configured to be simultaneously activated by the user at the exchange of payload information to transmit the first signal and to receive the second signal transmitted by the second device.
  • the first device and the second device are configured to operatively establish an exclusive wireless communication and exchanging payload information exclusively between the first device and the second device, provided that the second signal is the strongest wireless signal received by the first device and that the second device is accessible to the first device, and provided that the first signal is the strongest wireless signal received by the second device and that the first device is accessible to the second device.
  • a first portable wireless communication device configured to operatively exchange information with a second wireless communication device.
  • the first device is configured to operatively disable wireless communication until the exchange of payload information between the first device and the second device.
  • the first device is configured to be activated by the user at the exchange of payload information to transmit a first wireless signal and to receive a second wireless signal transmitted by the second device being simultaneously activated.
  • the first device is configured to operatively establish an exclusive wireless communication with the second device and to exchange payload information exclusively with the second device, provided that the second signal is the strongest wireless signal received by the first device and that the second device is accessible to the first device.
  • Fig. 1a is a schematic illustration of a wireless system 10 comprising a first wireless communication device 12a and a second wireless communication device 12b moved close together with their wireless transmissions disabled,
  • Fig. 1 b is a schematic illustration of the wireless system 10 in Figure 1 a when the first device 12a and the second device 12b exchange payload information after activation,
  • Fig. 1 c is a schematic illustration of the wireless system 10 in Figure 1 a when the first device 12a and the second device 12b confirm a successful exchange of information with their wireless transmissions disabled,
  • Fig. 1d is a schematic illustration showing two exemplifying scenarios wherein the first device 12a and the second device 12b are activated simultaneously a during a predetermined period
  • Fig. 2a is a schematic illustration showing the system 10 of Figures 1a-1c in an
  • FIG. 2b is a schematic illustration of an exemplifying exclusive information exchange according to an embodiment of the present solution
  • FIG. 2c illustrates the same scenario as in Figure 2b, with the addition that another exclusive information exchange has been established
  • Fig. 2d illustrates the same scenario as in Figure 2c, with the exception that the second wireless devices 12b and 12c are stationary whereas the other wireless devices12a, 12d and 12e are mobile (device 12f omitted),
  • Fig. 3 is a schematic illustration showing parts of the first wireless device 12a and the second wireless device 12b of the system 10 being relevant for one or several embodiments of the present solution,
  • Fig. 4a is a schematic illustration showing parts of the memory 12a5 of the first wireless device 12a being relevant for one or several embodiments of the present solution
  • Fig. 4b is a schematic illustration showing parts of the memory 12b5 of the second wireless device 12b being relevant for one or several embodiments of the present solution
  • Fig. 5 is a flowchart showing actions of a method according to one or several
  • Figures 1a-1c are schematic illustrations of an exemplifying wireless communication system 10 comprising a first wireless communication device 12a and a second wireless communication device 2b that are configured to operatively initiate an exchange of payload information between each other when the first and the second device have been moved close to each other.
  • the first device 12a and the second device 12b may be consider to be close to each other when the user of the first device 2a is able to reach the second device 12b, and the user of the second device 12b is able to reach the first device 12a.
  • the expression "be able to reach" the device refers to the distance between a user and a device, not to the ability of actually touching the device, which may e.g. be in a pocket of the user. It is preferred that the first device 12a and the second device 12b may be consider to be close to each other when the distance between the first device 12a and the second device 12b is less than 0,5 m, or at least less than 1 m, or at least less than 1 ,5 m.
  • the first device 12a and the second device 12b are preferably of the same or similar kind. It is preferred that the first device 12a and the second device 12b are portable, i.e. that the devices 12a and 12b are operatively mobile. However, the second device 12b may be stationary or semi-stationary. It is also preferred that the first device 12a and the second device 2b are configured to be hand-held by the user.
  • FIG. 3 is a schematic illustration showing parts of the first portable wireless communication device 12a and the second wireless communication device 2b of the wireless communication system 0 in 1a-1c being relevant for one or several embodiments of the present solution.
  • the first device 12a comprises an activator arrangement 12a1 , a transceiver unit 12a2, an interface unit 2a3, a control unit 12a4, a memory unit 2a5 and a confirmation arrangement 12a6.
  • the second device 12b comprises the same or similar activator arrangement 12b1 , transceiver unit 12b2, interface unit 12b3, control unit 2b4, memory unit 12b5 and confirmation arrangement 12b6. Since it is assumed that the first device 12a is of the same kind as the second device 12b in this exemplifying embodiment it is sufficient to describe the parts of the first device 12a, bearing in mind that corresponding numbers indicate corresponding arrangements and units.
  • the activator arrangement 12a1 is configured to be actuated by the user of the first device 12a so as to operatively activate the first device 12a.
  • the activator arrangement 12a1 may be any arrangement that can be actuated by the user to activate the first device 12a, e.g. a pushbutton or any other touch detecting, pressure detecting and/or motion detecting arrangement that can be touched and/or pressed or similar by the user.
  • the activator arrangement 12a1 may be a microphone or any other audio recording arrangement that can detect audible commands from the user.
  • the exemplifying activator arrangement 12a1 shown in Figures 1a-1c is a pushbutton configured to be pushed by the user to activate the first device 12a.
  • the transceiver unit 12a2 is configured to operatively transmit wireless signals from the first device 12a and/or to receive wireless signals, e.g. arriving form the second device 12b as will be further described later.
  • the transceiver unit 12a2 enables the first device 12a to establish and maintain communication with other devices of the same or similar kind, e.g. the second device 12b.
  • the first device 12a is a wireless communication device.
  • the first device 12a may also have an interface unit 12a3 that is configured to operatively connect the first device 12a to another electronic device, e.g. a computer and/or a detachable external memory unit or similar, e.g. for retrieving content from and/or loading content to the memory unit 12a5 of the first device 12a, e.g. loading payload information to the memory unit 12a5 and/or downloading received payload information from the memory unit 12a5.
  • the interface unit may e.g. be a connector enabling wired communication between the first device 12a and another electronic device, e.g. a computer or similar.
  • the wired communication may e.g. be according to the Universal Serial Bus (USB) specifications or according to any other specification known to those skilled in the art to be suitable for the purposes described herein.
  • USB Universal Serial Bus
  • the control unit 12a4 may be implemented using hardware and software, e.g. in the form of special dedicated programs running on hardware in the form of an Application- Specific Integrated Circuit (ASIC) or similar.
  • the control unit 12a4 is configured to control, monitor and/or communicate with the other parts and functions of the first device 12a so as to perform the actions or similar of the embodiments described herein.
  • the control unit 12a4 may be configured to control, monitor and/or communicate with the activator arrangement 12a1 , the transceiver unit 12a2, the interface unit 12a3, the control unit 12a4, the memory unit 12a5 and/or the confirmation arrangement 12a6.
  • the memory unit 12a5 is an internal memory of the first device 12a that is configured to store payload information to be transmitted by the first device 12a. It is preferred that the memory unit 12a5 is configured to store payload information that is received from other devices of the same or similar kind, e.g. from the second device 12b as will be described in more detail later.
  • the memory unit 12a5 may be any volatile or non-volatile memory known to those skilled in the art to be suitable for storing information in portable electronic devices.
  • the memory unit 2a5 may e.g. be a removable memory configured to be operatively detached and attached to the wireless device 12a.
  • the removable memory may e.g. be a memory stick e.g.
  • the payload information to be exchanged (i.e. transmitted) stored by the memory arrangement 12a5 of the first device 12a can be replaced by the user of the first device 12a.
  • the memory 12a5 is configured such that a first payload information 401 to be transmitted by the first device 12a to another wireless device such as the second device 12b, is separated from a second payload information 402 that has been received from another wireless devices such as the second device 12b, and that the first device 12a is configured to operatively transmit the first payload information 401.
  • the confirmation arrangement 12a6 is configured to operatively confirm a successful exchange of payload information to the user of the firs device 12a.
  • the confirmation arrangement 12a6 may be any arrangement that can emit a visible, audible and/or a tactile signal from the first device 12a such that the signal or signals can be perceived by a user of the first device 12a.
  • the confirmation arrangement 12a6 may e.g. comprise a Light Emitting Diode (LED) or a similar light emitting arrangement to emit a visible signal, or a loudspeaker or a similar audible arrangement to emit a audible signal and or a vibrator or a similar tactile arrangement to emit a tactile signal. Function of Embodiments
  • Disabling Wireless Transmissions (S1) According to a first action S1 of the exemplifying method shown in the flowchart of Figure 5 it is preferred that the wireless transmissions are disabled in the first device 12a and in the second device 12b.
  • first device 12a and the second device 12b are configured to operatively disable wireless transmissions until they are moved close together and the actual procedure of payload information exchange is initiated, as will be described below with reference to the second action S2.
  • first device 12a and the second device 12b are normally operable without making any wireless transmissions, unless they are activated to exchange payload information.
  • Figure 1a is a schematic illustration of the first device 12a and the second device 12b moved together with wireless transmissions disabled before the actual procedure of payload information exchange is initiated. It should be emphasized that disabling wireless communication until the actual exchange of information is initiated saves energy (e.g. battery power), which is particularly advantageous in portable devices. Other portable wireless communication devices may send out wireless transmissions more or less continuously, e.g. to announce its presence to other devices and/or in trying to establish communication with other devices within reach. Wireless transmissions require energy and such transmissions should therefore be avoided, particularly in portable wireless devices wherein the space for energy sources such as batteries or similar is limited thus resulting in small energy sources with limited capacity.
  • energy e.g. battery power
  • first device 12a and the second device 12b are moved close to each other and then activated by the user of the device in question.
  • the first device 12a is preferably activated by the user actuating the activator arrangement 12a1
  • the second device 12b is preferably activated by the user actuating the activator arrangement 12b1.
  • the first device 12a and the second device 12b are operable without making any wireless transmissions, unless they are activated by the user to exchange payload information. Thus it is preferred that the first device 12a and the second device 12b are not activated until the actual procedure of payload information exchange is initiated.
  • the first device 12a Once the first device 12a is activated by the user it will transmit a first wireless signal 14a and it will be ready to receive a second wireless signal 14b transmitted by the second device 12b.
  • the second device 12b is activated by the user it will transmit a second wireless signal 14b and it will be ready to receive a first wireless signal 14a transmitted by the first device 12a.
  • the first device 12a and the second device 12b are activated simultaneously at least during a predetermined period Tact before a wireless communication is allowed by the first device 12a and the second device 12b respectively to be established between the two devices 12a, 12b.
  • the first device 12a receives the second wireless signal 14b from the second device 12b at least during a predetermined period Tact before allowing a wireless communication to be established with the second device 12b.
  • the second device 12b receives the first wireless signal 14a from the first device 12a at least during a predetermined period Tact before allowing a wireless communication to be established with the first device 12a.
  • the first device 12a and the second device 12b may continue to receive the second signal 14b and the first signal 14a respectively after the predetermined period Tact, during which they are simultaneously activated.
  • the actual procedure of establishing a wireless communication between the two devices 12a, 12b will be described in more detail below with reference to the third action S3.
  • the period Tact during which the first device 12a and the second device 12b are activated simultaneously may e.g. be at least 2 seconds, or at least 3 seconds, or at least 4 seconds, or at least 5 seconds. It is preferred that the first device 12a and the second device 12b remain activated even if the user stops actuating the activator arrangement 12a1 and the activator arrangement 12b1 respectively. For example, if the activator arrangement 12a1 is a pushbutton or similar then it. is not required that the user keeps the pushbutton depressed for the full predetermined period Tact.
  • Figure 1d is a schematic illustration showing two exemplifying scenarios wherein the first device 12a and the second device 12b are activated simultaneously at least during a predetermined period.
  • a first scenario illustrates the first device 2a and the second device 12b activated simultaneous at least during first period Tactl .
  • the second device 12b is activated continuously or at least for a very long period; whereas the first deice 12a is only activated by the user at exchange of payload information.
  • a second scenario illustrates the first device 12a and the second device 12b activated simultaneous at least during second period Tact2.
  • the first device 12a is activated by the user at exchange of payload
  • the second deice 12b is activated by the user at exchange of payload information.
  • the actual establishment of a wireless communication between the first device 12a and the second device 2b, and/or the actual exchange of payload information between the first device 12a and the second device 12b may occur during and/or after the predetermined period Tact during which the devices 12a, 12b are simultaneously activated.
  • the user of the first device 12a and the user of the second device 12b activate their devices at the exchange of payload information makes it possible for the users to decide if and when payload information is to be exchanged between the two devices 12a, 12b.
  • the first device 12a and the second device 12b are activated simultaneously during a predetermined period Tact before a wireless communication is allowed the user's ability to decide if and when payload information is to be exchanged between the two devices 12a, 12b.
  • the risk of an unintentional exchange of payload information is eliminated or at least significantly reduced. This is particularly advantageous when the devices 2a, 12b are close to several other devices of the same or similar kind.
  • payload information may be exchanged between two devices merely because they are close to each other and/or because a signal received from a nearby wireless device is strong enough.
  • the exchange of payload information would be more or less random. This would be particularly so considering that the first device 12a and/or the second device 12b may be portable devices that are moved around during use and may thus in a more or less random manner end up close to any other device of the same or similar kind.
  • the users of the first and the second device 12a, 12b respectively may decide that payload information is to be exchanged exclusively between these two devices 12a, 12b by moving the devices 12a, 12b close to each other and then activate the devices 12a, 12b.
  • This is completely different compared to an information exchange that is effectuated solely because two devices are moved close together and/or depending solely on the strength of a signal that is received from a nearby wireless device, which may give a more or less random exchange of information as indicated above.
  • the signals 14a, 14b may be any wireless signal that is known by those skilled in the art to be suitable for the purpose described herein.
  • the signals 14a, 14b may e.g. be any suitable electromagnetic signal, e.g. such as microwave or infrared radiation.
  • the signals 14a, 14b may alternatively be any suitable acoustic signal, e.g. such as ultrasound or similar.
  • the signals 14a, 14b may e.g. be modulated and/or subjected to frequency hopping and/or carrying a frame structure or similar.
  • the first wireless signal 14a is transmitted by the first device 12a at activation with a power (e.g. dBW) such that a device of the same or similar kind, e.g. the second device 12b, must be close (i.e. within 0,5 m, or at least 1 m or at least 1 ,5 m as indicated above) to the first device 12a to be able to receive the first wireless signal 1 a.
  • a power e.g. dBW
  • the second wireless signal 14b is transmitted by the second device 12a at activation with a power (e.g. dBW) such that a device of the same or similar kind, e.g.
  • Transmitting signals 14a, 14b with a short range (i.e. with a low power) at activation of the wireless communication devices 12a, 12b has the advantage that a wireless communication may only be established between wireless communication devices that are close to each other. Wireless devices of the same or similar kind that are more distant (e.g. more than 0,5 m, or more than 1 m or more than 1 ,5 m away) will not be able to receive the signals. This improves the user's ability to select a particular wireless device for exchanging payload information.
  • Figure 1 b is a schematic illustration wherein the first device 12a has been activated to transmit the first wireless signal 14a and to receive the second wireless signal 14b transmitted by the second device, and wherein the second device 12b has been activated to transmit the second wireless signal 14b and to receive the first wireless signal 14a 10 transmitted by the first device 12a.
  • the second device 12b is activated early, i.e. before the actual procedure of payload information exchange is initiated.
  • the second device 12b may be activated before the first device 15 12a is moved close to the second device 12b and before the first device 12a is activated as described above. This may e.g. be the case when the first device 12a is portable whereas the second device 12b is a stationary or semi-stationary device, possibly with access to power supply from the electrical grid.
  • Figure 2d illustrates the same scenario as in Figure 2c (to be discussed below), with the modification that the second wireless device 12b and the third wireless device 12c are stationary, whereas the first wireless device 12a and the other wireless devices 12d and 12e are portable, i.e. mobile (device 12f is omitted for the sake of simplicity).
  • the second wireless device 12b and the third wireless device 12c may e.g. be arranged in an
  • the second wireless device 12b and the third wireless device 12c are activated early, e.g. continuously activated, or in turn, e.g. such that second device 12b is activated a predetermined period, and then the third device 12c a predetermined period, 0 and then the second device 12b again a predetermined period, and so on.
  • a simultaneous activation of the two stationary devices 12b and 12c while being close to each other would induce these two devices to establish a wireless communication between themselves and not with one of the mobile devices 12a, 12d or 12e as intended. However, this would not happen if the two stationary devices 12b and 12c are separated 5 such that they are not close to each other.
  • the mobile wireless devices 12a, 12d and 12e are activated at an exchange of payload information as described above.
  • the first wireless signal 14a transmitted by the activated first device 12a comprises setup information that can be used by the second device 12b to establish a wireless communication with the first device 12a.
  • the second wireless signal 14b transmitted by the activated second device 12b comprises setup information that can be used by the first device 2a to establish a wireless communication with the second device 12b.
  • the setup information may e.g. indicate the properties of the wireless communication to be established between the first device 12a and the second device 12b.
  • the setup information may e.g. indicate the radio parameters to be used for the wireless communication.
  • the radio parameters may e.g. define the frequency or the frequencies to be used, the modulation scheme to be used, possible frequency hopping, possible frame structure or similar to be used etc.
  • the setup information may also indicate possible encoding or similar to be used for the wireless communication between the devices 12a, 12b.
  • the first wireless signal 14a is received by the second device 12b and the second wireless signal 14b is received by the first device 12a, as described above with reference to the second action S2, it will be possible for the first device 12a and the second device 12b to establish an exclusive wireless communication between each other, e.g. by using received setup information.
  • an exclusive wireless communication is only established provided that the second wireless signal 14b is the strongest wireless signal received by the first device 12a and provided that the second device 12b is accessible to the first device 12a, and also provided that the first wireless signal 14a is the strongest wireless signal received by the second device 12b and provided that the first device 12a is accessible to the second device.
  • the wireless communication between the two devices 12a, 12b is preferably established using the first signal 14a and the second signal 14b.
  • the first device 12a and the second device 12b is configured to modify the first signal 14a 5 and the second signal 14b respectively so as to carry setup information.
  • the first device 12a and the second device 12b is configured to modify the first signal 14a and the second signal 14b respectively so as to carry payload information at an exchange of payload information between the two devices 12a, 12b as will be described in more detail later.
  • the observant reader realizes that the first device 12a and the second device 12b communicate directly with each other, i.e. the first device 2a and the second device 12b communicate without using any intermediate communication network, e.g. such as a local WLAN or a global telecommunication network e.g. based on the Global System for Mobile 15 Communication (GSM), or the General Packet Radio Service (GPRS), or the Universal Mobile Telecommunication System (UMTS), or the Worldwide Interoperability for Microwave Access (WiMAX) or similar
  • GSM Global System for Mobile 15 Communication
  • GPRS General Packet Radio Service
  • UMTS Universal Mobile Telecommunication System
  • WiMAX Worldwide Interoperability for Microwave Access
  • Figure 2a is a schematic illustration of the first wireless communication device 12a and 20 the second wireless communication device 12b moved close together such that the
  • second signal 14b is the strongest wireless signal received by the first device 12a, and such that the first signal 14a is the strongest wireless signal received by the second device 12b.
  • These nearby devices 12d, 12e and 12f may also be activated to transmit a wireless signal 14d, 14e and 14f respectively of the same kind as the first wireless signal 14a and the second wireless signals 14b.
  • These signals 14d, 14e and 14f may indeed be received by the first device 12a and the second device 12b.
  • none of the devices 12d, 12e or 12f in Figure 2a is close to the first device 12a or the second device 12b, with 30 the effect that the signals 14d, 14e or 14f will be received by the first device 12a weaker (i.e. with a smaller magnitude, e.g. dBW) compared to the stronger second signal 14b received from the closely arranged second device 12b.
  • the signals 14d, 14e or 14f will be received weaker by the second device 12b compared to the stronger first signal 14a received from the closely arranged first device 12a.
  • the first device 12a and the second device 12b establish an exclusive wireless communication between each other, i.e. such that the wireless communication, once it has been established, will only occur between the first device 12a and the second device 12b.
  • the first device 12a will receive and/or transmit exclusively from and/or to the second device 12b
  • the second device 12b will receive and/or transmit exclusively from and/or to the first device 12a.
  • the first device 12a and the second device 12b are configured such that they do not accept connection attempts and other wireless communication made by other wireless devices once the first and the second device 12a, 12b have established a wireless communication between each other.
  • An exclusive wireless communication may e.g. be accomplished by configuring the first device 12a and the second device 12b such that they do not respond to connection attempts and other wireless communication once they have established a wireless communication between each other. If the devices 12a, 12b respond to connection attempts it is preferred that they only respond by informing the attempting device that no wireless communication will be admitted.
  • An exclusive wireless communication may alternatively or additionally be established by e.g. configuring the first device 12a and the second device 12b such that they continuously select an operational frequency or operational frequencies that is/are not used by other wireless devices, thus avoiding other wireless communications and only accepting the wireless communications that is established between the two devices 12a, 12b.
  • An exclusive wireless transmission may alternatively or additionally be established by providing identification information in at least one of the first wireless signal 4a and the second wireless signal 14b, e.g. identification information in the first signal 14a that identifies the first device 12a to the second device 12b and identification information in the second signal 14b that identifies the second device 12b to the first device 12a.
  • the identification information may e.g. be the identity of the devices 12a, 12b, e.g. the MAC identifier or some other hardware identifier or software identifier or similar that identifies the devices 12a, 12b.
  • the identification information may alternatively or additionally indicate an encoding scheme or similar to be exclusively used for the wireless communication between the first and the second device 12a, 12b.
  • the identification information may even be the setup information previously described above.
  • the first and the second device 12a, 12b may then only accept wireless communications that identify the first and the second device 12a, 12b respectively, or only accept wireless communications that provide and/or apply the appropriate encoding scheme or similar and/or provide the expected setup information or similar.
  • FIG. 2b An exemplifying exclusive wireless transmission is schematically illustrated by Figure 2b showing the first device 12a and the second device 12b after an exclusive wireless communication has been established between the two devices 12a, 12b.
  • a third wireless device 12c of the same or similar kind transmits a third wireless signal 14c that is of the same kind as the first and second wireless signals 14a, 14b and that is received stronger (i.e. with a higher magnitude) by the first device 12a compared to the second signal 14b already received from the second device 12b.
  • the first device 12a and the second device 12b have already established an exclusive wireless communication between each other and the third signal 14c will therefore not be accepted by the first device 12a, even though the third signal 14c is stronger than the second signal 14b received by the first device 12a from the second device 12b.
  • the first device 12a will receive the third signal 4c from the third device with a higher magnitude (i.e. stronger) than the second signal 14b received from the second device 12b.
  • the first device 12a and the second device 12b are assumed to receive the third signal 4c from the third device with a higher magnitude (i.e. stronger) than the second signal 14b received from the second device 12b.
  • the first device 12a and the second device 12b are assumed to receive the third signal 4c from the third device with a higher magnitude (i.e. stronger) than the second signal 14b received from the second device 12b.
  • the first device 12a is currently not accessible to the third device 12c, which it would have been if the first device 12a and the second
  • the third device 12c is configured to detect that the first device 12a is not accessible. This may e.g. be accomplished by the third device 12c being configured to
  • the 20 detect: that the transmission of the strong first signal 14a from the first device 12a is switched to a new frequency at each attempt by the third device 12c to establish communication with the first device 12a, thus avoiding communication with the third device 12c; or that the first signal 1 a from the first device comprises information indicating that no further wireless communication will be admitted; or that the first signal
  • 25 14a comprises no identification information or similar enabling the third device 12c to establish wireless communication with the first device 12a.
  • the third device 12c in Figure 2c has detected that the first device 12a, from which the strongest wireless signal is received (i.e. the first signal 14a), is not accessible then it is preferred that the third device 12c is configured to detect whether the device from which 35 the second strongest wireless signal is received may be accessible.
  • the fourth signal 1 d transmitted by the fourth device 12d is the second strongest signal that is received by the third device 12c.
  • the fourth device 12d is accessible and it is preferred that the third device 12c is configured to establish an exclusive wireless communication with the fourth device 12d in the same or similar manner as previously described for the first device 12a establishing an exclusive wireless communication with the second device 12b.
  • the third device 12c is configured to detect, starting with the strongest received wireless signal and then in a decreasing order with respect to the strength of the received wireless signals, whether the wireless device from which the signal is received is accessible and then to establish wireless communication with the first wireless device detected to be accessible.
  • the features of the third device 12c now described do also apply mutatis mutandis to the first device 12a and to the second device 12b that were previously described above.
  • the user activation of the first device 12a and the second device12b as described above with reference to the second action S2 in combination with the exclusive information exchange between the first device 12a and the second device 12b and the non accessibility of the two devices 12a, 12b once wireless communication has been established between the two devices 12a, 12b as described above, makes it possible for a user of the first device 12a to select the second device 12b for an exchange of payload information, and for a user of the second device 12b to select the first device 12b for an exchange of payload information.
  • the selection of the wireless device for exchanging payload information is not random, as may indeed be the case if payload information was exchanged solely depending on the proximity to another wireless device and/or depending solely on the strength of a signal that is received from a nearby wireless device or similar.
  • a fourth action S4 of the exemplifying method shown in the flowchart of Figure 5 it is preferred that payload information is exclusively exchanged between the first device 12a and the second device 12b.
  • the first device 12a and the second device 12b have been activated as discussed above with reference to the second action S2, and once an exclusively wireless communication has been established between the two devices 12a, 12b as described above with reference to the third action S3, then it is preferred that the first device 12a 5 and the second device 12b are configured to operatively perform an exclusive wireless exchange of payload information exclusively between each other.
  • the exchange of payload information may be performed in any suitable manner via the exclusive wireless communication established between the first device 12a and the
  • the first device 12a and the second device 12b is configured to modify the first signal 14a and the second signal 14b respectively so as to carry payload information at the exchange of payload information between the two
  • the first device 12a may modify the first signal 14a so as to transfer payload information from the first device 12a to the second device 12b
  • the second device 12b may modify the second signal 14b so as to transfer payload information from the second device 12b to the first device 12a.
  • a transfer of payload information may occur in one direction, i.e. from the first device 12a to the second device
  • a modification of the first signal 14a and the second signal 14b so as to carry payload 25 information may e.g. be accomplished by modulating the signals 14a, 14b as is well known to those skilled in the art.
  • modulating the signals 14a, 14b as is well known to those skilled in the art.
  • the signals 12a, 12b may be modified in any other manner known by the skilled person to be suitable in this connection.
  • first device 12a and the second device 12b can be moved away from each other while the exchange of payload information continues. This means that the first device 2a and the second device 12b must not remain close to each other once the exchange has started, i.e. that the distance between the first device 12a and the second device 12b can be more
  • the payload information is the actual data that is exchanged between the first device 12a and the second device 12b. It is assumed that the payload information is distinct from any control information or setup information or similar that may also be exchanged between the devices 12a, 12b.
  • the payload information may e.g. be media files or similar, e.g. files comprising text, audio, still images and/or videos or similar.
  • the payload information can be replaced by the user of the wireless device 12a, 12b, i.e. that the payload information to be transmitted by the first device 12a can be replaced by the user of the first device 12a, and/or that the payload information to be transmitted by the second device 12b can be replaced by the user of the second device 12ba.
  • the payload may e.g. be replaced by being stored on a removable and exchangeable memory of the first device 12a and/or the second device 12b, and/or by being downloaded via a cable or similar connecting the first device 12a and/or the second device 12b to a computer or similar.
  • a successful exchange of payload information is confirmed by the first device 12a to the user of that device, and that a successful exchange of payload information is confirmed by the second device 12b to the user of that device.
  • the first device 12a is configured to confirm a successful exchange of payload information to the user of the first device 12.
  • the second device 12b is configured to confirm an exchange of payload information to the user of the second device 12b once the payload has been successfully exchanged.
  • a successful reception of payload in the first device 12a and/or in the second device 12b may e.g. be detected by using a checksum scheme or similar as is well known to those skilled in the art.
  • a skilled person having the benefit of this disclosure realizes that there are many other ways of detecting a successful reception of payload information in the first device 12a and/or in the second device 12b.
  • a report of a successful reception of payload information in the first device 12a may be communicated from the first device 12a to the second device 12b and vice versa.
  • the device transmitting the payload information may use this report to issue a confirmation to the user of this device.
  • the first devices 12a and the second device 12b may be close to each other when the exchange of information has finished the user of the first device 12a may also experience the confirmation given by the second device 12b, and user of the second device 12b may also experience the confirmation given by the first device12a. This operates as a conformation to the user of the device in question that an exchange has taken place between his device and the other devices selected by the user in question.
  • a successful exchange of payload information may be confirmed to the user of the device first device 12a or the user of the second device 12b in that a visible, an audible and/or a tactile signal is emitted from the confirmation arrangement 12a6 or the confirmation arrangement 12b6 respectively.
  • the first device 12a is configured to disable wireless transmissions after a successful exchange of payload information.
  • the second device 12b is configured to disable wireless transmissions after a successful exchange of payload information.
  • disabling wireless communication after a successful exchange of payload information resets the first device 12a and the second device 12b to the initial status described above with reference to the first action S .
  • disabling wireless information saves energy (e.g. battery power) and it is therefore particularly advantageous, particularly in portable wireless devices wherein the space for energy sources such as batteries or similar is very limited thus resulting in small energy sources with limited capacity.
  • energy e.g. battery power
  • An embodiment may be directed to a method of exchanging payload information between a portable first wireless communication device 12a and a second wireless communication device 12b.
  • the method may comprise the actions of: moving the first device 12a close to the second wireless device 12b while wireless transmission is disabled in the first device 12a; activating the second device 12b to transmit a second wireless signal 14b and to receive a first wirejess signal 14a transmitted from the first device 12a, and
  • the first device 12a simultaneously activating the first device 12a by the user at the exchange of payload information to transmit the first signal 14a and to receive the second signal 14b transmitted by the second device 12b; and establishing an exclusive wireless communication and exchanging payload information exclusively between the first device 12a and the second device 12b, provided that the second signal 1 b is the strongest wireless signal received by the first device 12a and that the second device 12b is accessible to the first device 12a, and provided that the first signal 14a is the strongest wireless signal received by the second device 12b and that the first device 12a is accessible to the second device 12b.
  • the first device 12a may be moved close to the second wireless device 12b while wireless transmissions is also disabled in the second device 12b.
  • the second device 12b may also be activated by the user at the exchange of payload information.
  • the power of the first signal 14a transmitted from the first device 12a may be such that the second device 12b must be close to the first device 12a to be able to receive the first signal 14a when establishing the exclusive wireless communication
  • the power of the second signal 14b transmitted from the second device 12b may be such that the first device 12a must be close to the second device 12b to be able to receive the second signal 14b when establishing the exclusive wireless communication.
  • the first device 12a may be considered as close to the second wireless device 12b when the distance between the first device 12a and the second device 12b is less than 0,5 meter, or less than 1 meter, or less than 1 ,5 meter.
  • the first device 12a may be moved from the second device 12b during the exchange of payload information while increasing the transmitting power of the first signal 14a and/or the second signal (14b) such that the exchange can continue.
  • the payload information may comprise one or several media files.
  • the payload information to be transmitted from the first device 12a and/or the second device 12b at an exchange may be replaceable by the user.
  • the payload information to be transmitted from the first device 12a and/or from the second device 12b is separated from payload information received by the device, and the first device 12a and/or the second device 12b is configured to only transmit the payload information to be transmitted at the exchange of payload information.
  • the first signal 14a from the first device 12a and/or the second signal 14b from the second device 12b may comprise id-information to be used by the receiving second device 12b and/or the receiving first device 12a respectively to establish the exclusivity of the exclusive wireless communication between the devices.
  • the first device 12a may detect whether the second device 12b is accessible by starting with the strongest received wireless signal and then in a decreasing order with respect to the strength of the received wireless signals, detect whether the wireless device from which the signal is received is accessible.
  • the second device 12b may detect whether the first device 12a is accessible by starting with the strongest received wireless signal and then in a decreasing order with respect to the strength of the received wireless signals, detect whether the wireless device from which the signal is received is accessible.
  • a successful exchange of payload information may be confirmed to the user of the first device 12a.
  • a successful exchange of payload information may be confirmed to the user of the second device 12b.
  • Wireless transmissions in the first device 12a may be disabled after a successful exchange of payload information.
  • Wireless transmissions in the second device 12b may be disabled after a successful exchange of payload information.
  • Another embodiment may be directed to a wireless communication system 10 comprising a portable first wireless communication device 12a and a second wireless communication device 12b configured to operatively exchange payload information between each other, Wherein.
  • the first device 12a may be configured to operatively disable wireless communication until the exchange of payload information between the first device 12a and the second device 12b.
  • the second device 12b may be configured to be activated to transmit a second wireless signal 14b and to receive a first wireless signal 14a transmitted from the first device 12a, and the first device 12a may be configured to be simultaneously activated by the user at the exchange of payload information to transmit the first signal 14a and to receive the second signal 14b transmitted by the second device 12b.
  • the first device 12a and the second device 12b may be configured to operatively establish an exclusive wireless communication and exchanging payload information exclusively between the first device 12a and the second device 12b, provided that the second signal 14b is the strongest wireless signal received by the first device 2a and that the second device 2b is accessible to the first device 12a, and provided that the first signal 1 a is the strongest wireless signal received by the second device 12b and that the first device 12a is accessible to the second device 12b.
  • the second device 12b may also be configured to operatively disable wireless communication until an exchange of payload information between the first device 12a and the second device 12b.
  • the second device 12b may also be configured to be operatively activated by the user at the exchange of payload information.
  • the first device 12a may b e configured to operatively transmit the first signal 14a with a power such that the second device 12b must be close to the first device 12a to be able to receive the first signal 14a when establishing the exclusive wireless communication.
  • the second device 12b may be configured to operatively transmit the second signal 14b with a power such that the first device 12a must be close to the second device 12b to be able to receive the first signal 14a when establishing the exclusive wireless communication.
  • the first device 12a may be configured to be operatively moved from the second device 12b during exchange of payload information while increasing the transmitting power of the first signal 14a such that the exchange can continue.
  • the second device 12b is configured to be operatively moved from the first device 2a during exchange of payload information while increasing the transmitting power of the second signal 14b such that the exchange can continue.
  • the first device 12a may be configured such that the payload information to be transmitted from the first device 12a at an exchange can be operatively replaced by the user.
  • the second device 12b may be configured such that the payload information to be transmitted from the second 12b at an exchange can be operatively replaced by the user.
  • Payload information to be transmitted from the first device 12a may be separated from payload information that is received by the first device 2a. Additionally or alternatively, payload information to be transmitted from the second device 12b may be separated from payload information that is received by the second device 12b.
  • the first device 12a and/or the second device 2b may be configured to only transmit the payload information to be transmitted at the exchange.
  • the first device 12a may be is configured to operatively transmit the first signal 14a comprising id-information to be used by the receiving second device 12b to establish the exclusivity of the exclusive wireless communication. Additionally or alternatively, the second device 2b may be configured to operatively transmit the second 14b comprising id-information to be used by the receiving first device 2a to establish the exclusivity of the exclusive wireless communication.
  • the first device 12a may be configured to operatively detect whether the second device 12b is accessible by starting with the strongest received wireless signal and then in a decreasing order with respect to the strength of the received wireless signals, detect whether the wireless device from which the signal is received is accessible.
  • the second device 12b may be configured to operatively detect whether the first device 12a is accessible by starting with the strongest received wireless signal and then in a decreasing order with respect to the strength of the received wireless signals, detect whether the wireless device from which the signal is received is accessible.
  • the first device 12a may be configured to operatively confirm a successful exchange of payload information to the user of the first device 12a. Additionally or alternatively, the second device 12b may be configured to operatively confirm a successful exchange of payload information to the user of the second device 12b.
  • the first device 2a may be configured to operatively disable wireless transmissions after a successful exchange of payload information. Additionally or alternatively, the second device 12b may be configured to operatively disable wireless transmissions after a successful exchange of payload information. Still another embodiment may be directed to a first portable wireless communication device 12a configured to operatively exchange information with a second wireless communication device 12b. The first device 12a may be configured to operatively disable wireless communication until the exchange of payload information between the first device 12a and the second device 12b. The first device 12a may be configured to be activated by the user at the exchange of payload information to transmit a first wireless signal 14a and to receive a second wireless signal 14b transmitted by the second device 12b being simultaneously activated.
  • the first device 12a may be configured to operatively establish an exclusive wireless communication with the second device 12b and to exchange payload information exclusively with the second device 12b, provided that the second signal 14b is the strongest wireless signal received by the first device 12a and that the second device 12b is accessible to the first device 12a.
  • the first device 12a may be configured to operatively transmit the first signal 14a with a power such that the second device 12b must be close to the first device 12a to be able to receive the first signal 14a when establishing the exclusive wireless communication.
  • the first device 12a may be configured to be operatively moved from the second device 12b during exchange of payload information while increasing the transmitting power of the first signal 14a such that the exchange can continue.
  • the first device 12a may be configured such that the payload information to be transmitted from the first device 12a at an exchange can be operatively replaced by the user.
  • Payload information to be transmitted from the first device 12a may be separated from payload information that is received by the first device 12a, and the first device 12a may be configured to operatively only transmit the payload information to be transmitted at the exchange.
  • the first device 12a may be configured to operatively transmit the first signal 14a
  • the first device 2a may be configured to operatively detect whether the second device 15 12b is accessible by starting with the strongest received wireless signal and then in a decreasing order with respect to the strength of the received wireless signals, detect whether the wireless device from which the signal is received is accessible.
  • the first device 12a may be configured to operatively confirm a successful exchange of 20 payload information to the user of the first device 12a.
  • the first device 12a may be configured to operatively disable wireless transmissions after a successful exchange of payload information.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Cette invention se rapporte à un procédé, un système et un dispositif portatif qui sont destinés à l'échange d'informations de charge utile entre un premier dispositif de communication sans fil (12a) portatif et un second dispositif de communication sans fil (12b). Ledit procédé comprend : le déplacement du premier dispositif sans fil (12a) de manière à ce qu'il soit proche du second dispositif sans fil (12b) alors que la transmission sans fil est désactivée sur le premier dispositif (12a) ; l'activation du second dispositif (12b) dans le but de permettre la transmission d'un second signal radioélectrique (14b) et de permettre la réception d'un premier signal radioélectrique (14a) transmis par le premier dispositif (12a), ainsi que l'activation simultanée du premier dispositif (12a) par l'utilisateur au moment de l'échange d'informations de charge utile afin de permettre la transmission du premier signal (14a) et de permettre la réception du second signal (14b) transmis par le second dispositif (12b) ; l'établissement d'une communication sans fil exclusive et l'échange d'informations de charge utile de manière exclusive entre le premier dispositif (12a) et le second dispositif (12b), à condition que le second signal (14b) soit le signal radioélectrique le plus fort de tous les signaux radioélectriques reçus par le premier dispositif (12a) et que ce second dispositif (12b) soit accessible pour le premier dispositif (12a), et à condition également que le premier signal (14a) soit le signal radioélectrique le plus fort de tous les signaux radioélectriques reçus par le second dispositif (12b) et que le premier dispositif (12a) soit accessible pour le second dispositif (12b).
PCT/SE2012/000024 2011-03-04 2012-03-01 Échange sans fil à courte distance d'informations de charge utile WO2012121641A1 (fr)

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SE1150198 2011-03-04

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030050009A1 (en) * 2001-09-12 2003-03-13 Kurisko Mark A. Security apparatus and method during BLUETOOTH pairing
WO2006027725A1 (fr) * 2004-09-08 2006-03-16 Koninklijke Philips Electronics N.V. Appariement securise pour dispositifs de communication filaires ou sans fil
US20090111378A1 (en) * 2007-10-31 2009-04-30 Motorola, Inc. Devices and methods for content sharing
US20090325491A1 (en) * 2008-06-05 2009-12-31 Bell Robert T System for utilizing identity based on pairing of wireless devices
EP2302884A1 (fr) * 2009-09-24 2011-03-30 Research In Motion Limited Dispositif mobile de communications sans fil, procédé et système utilisant un capteur magnétique et un circuit NFC activé pour établir des communications entre des dispositifs mobiles de communications sans fil

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030050009A1 (en) * 2001-09-12 2003-03-13 Kurisko Mark A. Security apparatus and method during BLUETOOTH pairing
WO2006027725A1 (fr) * 2004-09-08 2006-03-16 Koninklijke Philips Electronics N.V. Appariement securise pour dispositifs de communication filaires ou sans fil
US20090111378A1 (en) * 2007-10-31 2009-04-30 Motorola, Inc. Devices and methods for content sharing
US20090325491A1 (en) * 2008-06-05 2009-12-31 Bell Robert T System for utilizing identity based on pairing of wireless devices
EP2302884A1 (fr) * 2009-09-24 2011-03-30 Research In Motion Limited Dispositif mobile de communications sans fil, procédé et système utilisant un capteur magnétique et un circuit NFC activé pour établir des communications entre des dispositifs mobiles de communications sans fil

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