• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
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    • 专利摘要:
    METHOD OF PERFORMING COMMUNICATION BETWEEN A FIRST DEVICE AND A SECOND DEVICE USING A DIRECT WI-FI SCHEME, DEVICE TO PERFORM COMMUNICATION BETWEEN A FIRST DEVICE AND A SECOND DEVICE USING A DIRECT WI-FI SCHEME, AND COMPUTER READY RECORDING MEDIA. A method of performing communication between a first device and a second device using a direct Wi-Fi scheme is disclosed. The method includes receiving information about a content protection capability of the second device in a device discovery procedure, and determining whether to perform a connection establishment procedure received on the content protection capability.
    公开号:BR112013016094B1
    申请号:R112013016094-2
    申请日:2011-12-23
    公开日:2022-02-01
    发明作者:Jin Woo Jeong；Lochan VERMA
    申请人:Samsung Electronics Co., Ltd；
    IPC主号:
    专利说明:

    Background of the invention
    1. Field of invention
    The present invention relates to a method and device for securing content in a Wi-Fi direct communication scheme. 2. Description of the related technique
    A Wi-Fi direct communication scheme is different from the conventional Wi-Fi scheme, and is a network suggested by a Wi-Fi alliance that is connected by a non-hierarchical scheme between devices even though the Wi-Fi devices do not participate in a home network. , an office network and a hot spot network.
    Figure 1 illustrates a Wi-Fi direct communication scheme according to a prior art.
    In Figure 1, a DVD player 101 uses the Wi-Fi direct communication scheme to transmit content 104 such as music, photos and moving images to a TV1 102 or a TV2 103 which is a display device.
    The DVD player 101 may be another device that stores content, such as an MP3 player, a personal computer, and a simple storage medium. TV1 102 or TV2 103 may be another device that displays content to a user, such as a monitor and a speaker.
    Content 104 such as music, a photo, and a moving image may be copyrighted content.
    The conventional Wi-Fi direct (P2P) scheme is not a standard that has been suggested in consideration of a display device, but it is a standard that has been suggested based on connectivity between devices. Consequently, it was not possible to recognize whether a device supports content protection before setting the connection between the devices.
    In the Wi-Fi direction scheme, it is not possible for the DVD player 101 to recognize whether each TV supports content protection before setting the connection to TV1 102 and TV2 103 of figure 1. Assuming that TV1 102 is a device that does not support content protection and TV2 103 is a device that supports content protection, if DVD player 101 is connected to TV1 102 via Wi-Fi direct scheme and copyrighted content 104 is intended to be played back, a message indicating that the content cannot be played back on TV1 101 is displayed. Thus, when the user wants to replay the content 104 through the DVD player 101, the user inconveniently needs to wait for the connection between the DVD player 101 and TV2 103 and then play the content again.
    In addition, TV1 102 does not support content protection and thus cannot replay content 104, but unnecessary power is consumed to make connection with DVD player 101. Summary of the invention
    The present invention provides a method to receive information about whether a device supports content protection in a device discovery procedure of looking for a surrounding device when performing communication between display devices according to a direct Wi-Fi scheme to provide a scheme communication system to run an efficient Wi-Fi' direct communication scheme between display devices.
    In accordance with one aspect of the present invention, there is provided a method of performing communication between a first device and a second device using a direct Wi-Fi scheme, including: receiving information on a content protection capability of the second device in a procedure device discovery; and determine whether to perform a connection establishment procedure with the second device based on the information received in the content protection capability.
    Õ receiving the information in the content protection capability of the second device may include receiving a probe response message including the information in the content protection capability.
    The method may further include: transmitting information about a content protection capability from the first device to the second device, wherein information from the content protection capability of the second device is received in response to information transmitted in the content protection capability of the second device; first device.
    The transmission of information about the content protection capability of the first device may include transmitting a probe request message including the information about the content protection capability.
    Information about the content protection capability can be included in a Wi-Fi Display Information Element (WFD IE).
    Information about content protection capability can be included in a Wi-Fi Display Device (WFD) Information Field in WFD IE.
    Information about the content protection capability may indicate whether high definition content protection 2.0 (HDCP 2.0) is supported.
    In accordance with another aspect of the present invention, there is provided a device for performing communication using a direct Wi-Fi scheme, including: a receiving unit that receives information about a content protection capability of an opposing device in a discovery procedure device; and a determination unit that determines whether to perform a connection establishment procedure with the opposing device based on information received in the content protection capability.
    The receiving unit may receive a probe response message including information about the content protection capability.
    The device may further include: a transmission unit that transmits information about a content protection capability from the device to the opposing device, wherein information about the content protection capability of the opposing device is received in response to information transmitted about the device content protection capability.
    The transmission unit can transmit a probe request message including information about the content protection capability.
    Information about the content protection capability can be included in a Wi-Fi Display Information Element (WFD IE).
    Information about content protection capability can be included in a Wi-Fi Display Device (WFD) Information Field in WFD IE.
    Information about the content protection capability may indicate whether high definition content protection 2.0 (HDCP 2.0) is supported. Brief description of drawings
    The above and other features and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the accompanying drawings in which:
    Figure 1 is a conceptual diagram illustrating a Wi-Fi direct communication scheme according to a prior art;
    Figure 2 is a flowchart illustrating a device discovery procedure of a first device in accordance with an embodiment of the present invention;
    Figure 3 is a flowchart illustrating a device discovery procedure of a first device in accordance with another embodiment of the present invention;
    Figure 4 is a block diagram illustrating a structure of a first device and a second device in accordance with an embodiment of the present invention;
    Figure 5 is a diagram illustrating a Wi-Fi Display Information Element (WFD) (IE) in accordance with an embodiment of the present invention.
    Figure 6 is a diagram illustrating a general format of a WFD sub-element in accordance with an embodiment of the present invention;
    Fig. 7 is a diagram illustrating a WFD sub-element ID in accordance with an embodiment of the present invention;
    Figure 8 is a diagram illustrating a WFD device information sub-element in accordance with an embodiment of the present invention;
    Fig. 9 is a diagram illustrating a WFD device information field in accordance with an embodiment of the present invention; and
    Fig. 10 is a signal flowchart of a WFD communication in accordance with an embodiment of the present invention. Detailed description of the invention
    The present invention will now be described more fully with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown. Similar reference numerals in the drawings indicate similar elements, and thus their description will be omitted. The size of each component of the components may be exaggerated for clarity of description.
    Figure 2 is a flowchart illustrating a device discovery procedure of a first device in accordance with an embodiment of the present invention.
    The device discovery procedure is a procedure for finding a surrounding device for communication, and it is a procedure for looking for a device that supports a direct Wi-Fi scheme between devices that require surrounding a device for the device to perform connection. Also, when there is a device that supports a Wi-Fi direct scheme, information on each device can be received.
    However, the conventional Wi-Fi Direct (P2P) scheme is not a standard that has been suggested in consideration of a display device, and thus there is no procedure to properly protect a content in the device discovery procedure.
    In operation 201, the first device receives information about the content protection capability of the second device from the second device in the device discovery procedure.
    Content protection capability information is information about whether the device supports content protection.
    Information about the second device's content protection capability received from the second device can be included in a probe response message. The probe response message is a receiving device information message in the device discovery procedure of the Wi-Fi direct communication scheme.
    Specifically, information about the content protection capability can be included in the Wi-Fi Display Information Element (WFD IE). The WFD IE will be described in detail later with reference to figure 5.
    In addition, information on content protection capability can be included in the WFD information field in WFD IE. The WFD information field will be described in detail later with reference to figure 8.
    Information about the content protection capability can be information indicating whether the second device supports High Definition Content Protection 2.0 (HDCP 2.0) .
    Here, HDCP is one of the copyright protection technologies to encrypt a path through which digital signals are transmitted and received from a moving image playback device to a display device, and to prevent unauthorized copying of a content, and is a standard designed to protect the integrity of content. HDCP is a well-known standard, so the detailed description of it will be omitted here.
    In operation 202, it is determined whether the first device can perform a connection establishment procedure with the second device based on information about the content protection capability of the second device received in operation 201.
    That is, the first device determines whether the second device supports content protection by information received from the second device, and determines whether to perform a connection establishment procedure with the second device.
    Several methods can be used to determine whether to perform the connection establishment procedure. For example, when there are a plurality of devices that support a Wi-Fi direct communication scheme, information about whether to perform a connection establishment with another device can be received from the user by displaying whether the plurality of devices support content protection on the first device. .
    As another modality, a connection establishment can be set to be automatically performed according to a priority that is set on the first device.
    If there is only one device that supports Wi-Fi direct communication scheme, the device can be set to display whether the device supports content protection before performing connection establishment.
    Figure 3 is a flowchart illustrating a device discovery procedure of a first device in accordance with another embodiment of the present invention.
    In the Wi-Fi direct scheme, the device has determined the device that operates as an access point (AP) or the device that operates as a station after the connection establishment procedure, and thus the role of each device is not determined in the device discovery procedure. Consequently, the second device may need the information from the first device after the connection establishment procedure, and thus the second device also receives the information from the first device.
    In operation 301, the first device transmits information about the content protection capability of the first device to the second device.
    Information about the content protection capability transmitted by the first device to the second device can be included in a probe request message.
    The probe request message is a message to pass device information in the device discovery procedure of the Wi-Fi direct communication scheme.
    Information on content protection capability can be included in WFD IE. Information on content protection capability can be included in the WFD device information field in WFD IE.
    Information about content protection capability can be information indicating whether HDCP 2.0 is supported.
    In operation 302, the first device receives information about the content protection capability from the second device as in operation 201 of Fig. 2.
    In operation 303, the first device determines whether to establish connection with the second device based on information about the content protection capability as in operation 202 of Fig. 2. Connection establishment can be performed in various schemes as described with reference to figure 2.
    In addition, the second device can also determine connection to the first device based on information about the content protection capability received from the first device.
    Figure 4 is a block diagram illustrating a structure of a first device and a second device in accordance with an embodiment of the present invention.
    The transmission unit 411 of the first device 410 transmits information about the content protection capability of the first device to the second device. As illustrated in Figure 3, information related to the content protection capability of the first device 410 can be included in the probe request message, WFD IE, and WFD device information field of the WFD IE.
    A receiving unit 412 of the first device 410 receives information related to the content protection capability of the second device 420 from the second device.
    The determining unit 413 of the first device 410 determines whether to perform a connection establishment procedure with the second device 420 based on information related to the content protection capability of the second device that has been received by the receiving unit of the second device 420.
    The transmission unit of the second device 420 transmits information related to the content protection capability of the second device 420 to the first device 410.
    The receiving unit 421 of the second device 420 receives information related to the content protection capability of the first device 410 from the first device 410.
    A determining unit 423 of the second device determines whether to perform a connection establishment procedure with the first device 410 based on information related to the content protection capability of the first device 410 received from the first device 410.
    Figure 5 is a diagram illustrating a Wi-Fi display (WFD) information element (IE) in accordance with an embodiment of the present invention.
    Here, WFD is a communication scheme and refers to a scheme where communication is performed between display devices based on Wi-Fi direct standard.
    WFD IE represents a format of a frame that receives basic information such as a state and device type. The probe request frame or probe response frame is also recorded according to the WFD IE format.
    In the illustrated example, WFD IE includes Element ID, Length, OUI, OUI Type, and WFD sub-elements. Respective sizes of Element ID, Length, OUI, and OUI TYPE fields are 1, 2, 3, and 1 octets, and the size of WFD subelements is variable.
    The Element ID field is a field that is used when a vendor wants to do functions that are not defined in the IEEE 802.11 standard and the Length field indicates the total length of the IE WFD.
    The OUI field is an abbreviation for Organization Unique Identifier and represents a unique identifier defined to distinguish each vendor, and the OUI type field represents the WFD IE version.
    The content recorded in the WFD IE is not sufficient for the WFD Sub-Element field, so dots indicating detailed device information are included in the WFD Sub-Element field. Points included in the WFD Sub-Element field will be described in detail with reference to Figure 6. Some of the WFD ID's of the present invention may be omitted as necessary.
    Figure 6 is a diagram illustrating a general format of a WFD Sub-Element according to an embodiment of the present invention.
    Here, the WFD Sub-Element includes Sub-Element ID, Length, and Sub-Element body fields. The sizes of sub-element ID and Length fields are respectively 1, and the size of the sub-element body field is variable.
    The sub-element ID of the present embodiment represents a type of the WFD sub-element, which will be described in detail later with reference to Figure 7.
    The Length field of the present embodiment represents the entire length of the WFD sub-element. The Sub-Element body field of the present modality shows specific points of the Sub-Element.
    Some of the WFD sub-elements may be omitted as necessary. Fig. 7 is a diagram illustrating a WFD sub-element ID in accordance with an embodiment of the present invention.
    WFD device information of the present embodiment refers to information on the WFD device. In the present invention, the content protection capability of a device intended to be acquired before establishing connection is recorded in the WFD sub-element of the WFD Device Information type, which will be described in detail with reference to Figure 8.
    The status of the present embodiment represents device status information. Associated BSSID of the present embodiment represents an identifier that identifies a basic service area in 802.11. The display EDID of the present embodiment represents a data type for transmitting display information from a device.
    Coupled store information of this modality represents connection with another device.H.264 Codec, LPCM Codec, AAC Codec, Dolby Digital Codec and DTS Codec of this modality show information about Codec. Each Codec is a standard well known in the art and therefore detailed description about each Codec is omitted here.
    Transport Capability, 3D Video Capability, Local IP Address, and Control Signal Capability of the present modality show the capability and address of the device, and the detailed description of them is omitted here.
    Also, information related to Content Protection Capability can be included in the Sub-Element ID by adding Content Protection Capability.
    Some of the sub-element IDs may be omitted as necessary. Figure 8 is a diagram illustrating information included in a WFD device information sub-element in accordance with an embodiment of the present invention.
    When the sub-element ID field of figure 7 is 1, the sub-element about WFD device information is 20 included. Here, content related to device information is displayed in the WFD device information in a bitmap format. Details are described with reference to figure 8.
    The device's maximum transmission capacityWFD shows the device's average maximum transmission capacity.
    Fig. 9 is a diagram illustrating a WFD device information field in accordance with an embodiment of the present invention. The WFD device information field may be revealed in a bitmap form.
    First and second WFD device information field bits (bits 0 and 10 of the present embodiment indicate a WFD source, a WFD depot, a primary depot device, and a secondary depot device.
    A third WFD device information field bit (bit 2) of the present embodiment indicates whether a secondary deposit operation is supported.
    Fourth and fifth bits of the WFD device information field (bits 3 and 4) of the present embodiment indicate a downgrade status of the current device and whether downgrade is possible.
    A sixth bit of the WFD device information field (bit 5) of the present embodiment indicates whether a service discovery procedure is performed. WFD is supported.
    A seventh WFD device information field bit (bit 6) of the present embodiment indicates a device connection scheme. That is, the seventh bit indicates whether the device supports a direct Wi-Fi scheme, i.e. P2P scheme, or a tunneled direct link establishment (TDLS) scheme. The TDLS scheme is not the Wi-Fi direct scheme, and is a wireless communication scheme where communication is performed through AP.
    An eighth bit of the WFD device information field (bit 7) of the present embodiment indicates information about the content protection capability of the device. As illustrated in figure 7, the content protection capability can be defined in the sub-element ID and points that display the content protection capability can be added, and as illustrated in figure 9, information about the content protection capability can be added. device content can be indicated in the device information sub-element.
    The content protection capability of the present embodiment may be information indicating whether HDCP 2.0 is supported. Fig. 10 is a signal flowchart of a WFD communication according to an embodiment of the present invention.
    A probe request message 1002 and a probe response message 1003 are exchanged in a device discovery procedure 1001 between a source device 1012 and a deposit device 1013. Information about the content protection capability of the device may be included in the probe request message 1002 and the probe response message 1003, and thereby content protection capability information is exchanged between the source device 1012 and the deposit device 1013.
    The 1004 service discovery procedure is optional, and whether the procedure should be performed according to whether the device supports the content protection capability as described with reference to figure 9. When the 1004 service discovery procedure is performed, information related to content protection capability can be exchanged in service discovery procedure 1004.
    Information related to the device's content protection capability is exchanged before connection establishment procedure 1005, and information related to the device's content protection capability is displayed to users 1011 and 15 1014 of the respective devices. The user can select the device with which a connection establishment procedure should be performed based on information related to the content protection performance of the displayed device.
    After the information related to the content protection capability is exchanged, the connection establishment procedure 1005 with the device selected by the user input is performed, and afterwards a capability negotiation procedure 25 1006 is performed. In the 1006 capability negotiation procedure, the device that should play a role of an access point (AP) and a station is determined as in a general Wi-Fi direct scheme. In addition, information related to content protection capability can be set to be exchanged in the capability negotiation procedure.
    The invention may also be embodied as computer readable codes on a computer readable recording medium. The computer readable recording medium is any data storage device that can store data which can later be read by a computer system. Examples of computer readable recording media include read-only memory (ROM), random access memory (RAM), CD-ROMs, magnetic tapes, floppy disks, optical data storage devices, etc. the computer readable recording medium may also be distributed across networked computer systems so that the computer readable code is stored and executed in a distributed mode.
    While the present invention has been particularly mustard and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the present invention as defined by the following claims.
    权利要求:
    Claims (11)
    [0001]
    1. METHOD FOR PERFORMING COMMUNICATION BETWEEN A FIRST DEVICE AND A SECOND DEVICE USING A POINT-TO-POINT (P2P) SCHEME, the method characterized by comprising: transmitting, by the first device (410), a probe request message, to a procedure of device discovery; receiving, by the first device (410), a probe response message comprising content protection capability information from the second device in response to the probe request message; and performing a connection setup procedure with the second device (420) based on the probe response message including the content protection capability information of the second device; performing a capability negotiation procedure with the second device (420) comprising receiving a content protection capability information of the second device after the connection setup procedure, wherein the probe request message comprises a content protection capability information of the first device and information related to a device type of the first device and the information related to the device type of the first device indicates whether a source device function or collector device function is supported.
    [0002]
    Method according to claim 1, characterized in that it additionally comprises determining whether it is the case to carry out the connection configuration procedure with the second device based on input from a user.
    [0003]
    Method according to claim 1, characterized in that the content protection capability information and information regarding the device type are included in a WiFi Display Information Element (WFD IE).
    [0004]
    Method according to claim 3, characterized in that the content protection capability information is included in a WiFi display sub-element within the WFD IE and the WiFi display sub-element further comprises a among the device status information, Basic Service Set Identifier (BSSID) information related to the identification of a Basic Service Set, Display Extended Display Identification (EDID) data information indicating a data type for transmission, and coupled collector information indicating connection to another device.
    [0005]
    5. Method according to claim 1, characterized in that the content protection capability information indicates whether a high definition content protection 2.0 (HDCP 2.0) is supported.
    [0006]
    6. DEVICE FOR PERFORMING COMMUNICATION using a point-to-point (P2P) scheme, the device characterized by comprising: a transmitter that transmits a probe request message, for a device discovery procedure; a receiver that receives a response message probe comprising information on the content protection capability of a second device in response to the probe request message; and a processor that performs a procedure of establishing connection with the second device based on the probe response message including information of the content protection capability of the second device and performs a procedure of negotiating the capability with the second device (420) comprising receiving a content protection capability information of the second device, after the connection establishment procedure, wherein the probe request message comprises information about the content protection capability of the first device and information with respect to a device type of the first device device and device device type information that indicates whether a source device function or collector device function is supported
    [0007]
    Device according to claim 8, characterized in that the processor determines whether to carry out a procedure of establishing connection with the second device based on user input.
    [0008]
    Device according to claim 6, characterized in that the content protection capability information and information regarding the device type are included in a wi-fi display information element (WFD IE).
    [0009]
    Device according to claim 8, characterized in that the content protection capability information is included in a WiFi display sub-element within the WFD IE and the WiFi display sub-element further comprises a among the device status information, Basic Service Set Identifier (BSSID) information related to the identification of a Basic Service Set, Display Extended Display Identification (EDID) data information indicating a data type for transmission, and coupled collector information indicating connection to another device.
    [0010]
    10. Device according to claim 9, characterized in that the content protection capability information indicates whether high definition content protection 2.0 (HDCP 2.0) is supported.
    [0011]
    11. COMPUTER-LEABLE RECORDING MEDIA, characterized in that it contains instructions that, when executed by a computer, perform the method described in any of claims 1 to 5.
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    法律状态:
    2018-12-18| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2020-04-14| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2020-04-14| B15K| Others concerning applications: alteration of classification|Free format text: AS CLASSIFICACOES ANTERIORES ERAM: H04W 48/16 , H04W 92/18 , H04W 52/02 Ipc: H04L 29/06 (2006.01), H04W 8/00 (2009.01), H04W 12 |
    2021-08-24| B350| Update of information on the portal [chapter 15.35 patent gazette]|
    2021-09-08| B06A| Patent application procedure suspended [chapter 6.1 patent gazette]|
    2021-12-21| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2022-02-01| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 23/12/2011, OBSERVADAS AS CONDICOES LEGAIS. PATENTE CONCEDIDA CONFORME ADI 5.529/DF, QUE DETERMINA A ALTERACAO DO PRAZO DE CONCESSAO. |
    优先权:
    申请号 | 申请日 | 专利标题
    US201061427156P| true| 2010-12-24|2010-12-24|
    US61/427,156|2010-12-24|
    PCT/KR2011/010067|WO2012087078A2|2010-12-24|2011-12-23|Method and apparatus for protecting content in a wi-fi direct communication scheme|
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