WO2013073838A4 - 와이파이 다이렉트 네트워크를 통한 지원 서비스 탐색 방법 및 디바이스 - Google Patents
와이파이 다이렉트 네트워크를 통한 지원 서비스 탐색 방법 및 디바이스 Download PDFInfo
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- WO2013073838A4 WO2013073838A4 PCT/KR2012/009608 KR2012009608W WO2013073838A4 WO 2013073838 A4 WO2013073838 A4 WO 2013073838A4 KR 2012009608 W KR2012009608 W KR 2012009608W WO 2013073838 A4 WO2013073838 A4 WO 2013073838A4
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/50—Network services
- H04L67/51—Discovery or management thereof, e.g. service location protocol [SLP] or web services
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
- H04W4/08—User group management
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/005—Discovery of network devices, e.g. terminals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/10—Small scale networks; Flat hierarchical networks
- H04W84/12—WLAN [Wireless Local Area Networks]
Definitions
- the present invention relates to a device and a control method thereof, in which usage of a Wi-Fi direct device can be implemented in consideration of convenience of a user.
- Wi-Fi Direct Network is a network that allows peer-to-peer connections between Wi-Fi devices without requiring participation in home, office, and hotspot networks.
- Wi- Wi-Fi Alliance, WFA.
- Devices in a Wi-Fi direct network should be able to search for capability information of each other.
- the present invention proposes a Wi-Fi device and a method for searching for a service that can efficiently determine a support service of a device to be connected before a Wi-Fi direct connection is established, which is proposed in order to satisfy the above- .
- a method for providing a service discovery request frame comprising: generating a service discovery request frame for searching for a service supported by each device belonging to a wireless communication group; Transmitting a service discovery response frame including service information supported by each device belonging to the wireless communication group to the owner device of the devices belonging to the wireless communication group in response to the service discovery request frame, ) From the owner device.
- a method for providing a service discovery request frame comprising: receiving a service discovery request frame for searching for a service supported by each device belonging to the wireless communication group, A step in which the owner device generates a service discovery response frame including service information supported by each device belonging to the wireless communication group in response to the received service discovery request frame, And transmitting the service search response frame to the predetermined device.
- the present invention it is possible to determine whether or not a support service identified prior to establishing a connection through the Wi-Fi direct network is presently available, and further information can be further provided to the user .
- FIG. 1 is a block diagram of a Wi-Fi device 100 supporting a Wi-Fi direct network according to an embodiment of the present invention.
- FIG. 2 is a diagram illustrating a process of searching for a Wi-Fi device 100 service in a Wi-Fi direct network according to an embodiment of the present invention.
- FIG. 3 is a diagram illustrating an example of a method for searching for a service provided by a wireless communication group according to an embodiment of the present invention. Referring to FIG.
- FIG. 4 is a flowchart illustrating a process of searching for a service provided by the wireless communication group of FIG. 3 according to an embodiment of the present invention.
- 5A to 5E are diagrams illustrating an example of fields of a service search request / search response frame according to an embodiment of the present invention.
- FIG. 6 is a diagram illustrating an example of a method for collectively grasping support services of devices belonging to a group according to another embodiment of the present invention.
- FIG. 7 is a diagram illustrating an example of a field structure of a group service search response frame according to an embodiment of the present invention.
- FIG. 8 is a diagram illustrating an example of a group service discovery process according to another embodiment of the present invention. Referring to FIG. 8
- FIG. 9 is a diagram showing an example of including information on whether or not the " Status Code " field in the service TLV of the group service search response frame is currently available according to an embodiment of the present invention.
- FIG. 10 is a diagram illustrating an example of a method for providing information that can update the support service when a change occurs in the support service according to another embodiment of the present invention.
- 11A is a diagram showing an example of a " Status Code " field included in a service search response frame according to another embodiment of the present invention.
- 11B is a diagram illustrating an example of a service update notification frame according to an embodiment of the present invention.
- 11C is a diagram illustrating a detailed field configuration of the " Update data " field according to an embodiment of the present invention.
- FIG. 12 is a diagram for explaining a method of determining an owner / client device when forming a wireless communication group according to another embodiment of the present invention.
- FIG. 13 is a diagram illustrating an example of a method of associating a host / dock device in a USB service protocol with an owner / client device on a Wi-Fi direct network according to an embodiment of the present invention.
- FIG. 14 is a flowchart illustrating a method of setting an owner / client device when one of two devices providing a USB service protocol supports only a host device and the other supports only a dock device.
- 15A is a diagram illustrating fields of a WS-IE (Wi-Fi USB Information Elements) according to an exemplary embodiment of the present invention.
- WS-IE Wi-Fi USB Information Elements
- 15B shows an example of a specific detail field of a " WSB Subelements " field according to an embodiment of the present invention.
- 15C is a diagram showing an example of a detail field of the " Subelements body field ".
- 15D is a diagram showing an example of the bit structure of " WSB Device Information " according to an embodiment of the present invention.
- 16 and 17 are flowcharts of a WSB connection establishment process for explaining an embodiment of the present invention.
- FIG. 18 is a flowchart illustrating a method for determining an owner / client device according to an embodiment of the present invention.
- FIG. 1 is a block diagram of a Wi-Fi device 100 supporting a Wi-Fi direct network according to an embodiment of the present invention.
- a Wi-Fi device 100 includes a transceiver 101, a PHY protocol module 102, a MAC protocol module 103, a frame generator 104, And a control unit 105.
- the transceiver 101 transmits and receives data to and from another Wi-Fi device 100-2 using a Wi-Fi network. Upon receiving the information generated from the PHY protocol module 102, the transceiver unit 101 moves the received information to an RF spectrum, filters it, amplifies the RF spectrum, do. In addition, the transceiver unit 101 performs a function of transferring an RF signal (Radio Frequency Signal) received from an antenna to a band that can be processed by the PHY protocol module 102 and performing filtering.
- the transmission / reception unit 101 may also include a switch function for switching the transmission and reception functions.
- the PHY protocol module 102 When the PHY protocol module 102 is requested to transmit data from the MAC protocol module 103, the PHY protocol module 102 performs a FEC encoding, a modulation, a preamble, and a pilot on the requested data. Or the like, and transmits the processed signal to the transmission / reception unit 101. [0033] FIG.
- the PHY protocol module 102 receives demodulation, equalization, FEC decoding (Forward Error Correction Decoding), and PHY (Physical Layer Decoding) when the received signal is received by the transceiver 101 And transmits the data to the MAC protocol module 103 through a process of enhancing a signal added in the physical layer.
- the PHY protocol module 102 may include a modulator, a demodulator, an equalizer, an FEC encoder, and a FEC decoder (Forward Error Correction decoder).
- the MAC protocol module 103 performs necessary processes for transferring data transferred from the upper layer to the PHY protocol module 102 and performs additional processing for performing basic communication.
- the upper layer processes data requested to be transmitted and processes the data to be transferred to and transferred to the PHY protocol module 102, processes the received data transferred from the PHY protocol module 102, . It may also be responsible for handling the communication protocol by taking charge of any additional transmission and reception necessary for such data transfer.
- the frame generation unit 104 generates a data frame, a request frame, and / or a response frame to communicate with another Wi-Fi device 100-2.
- a service search request frame and / or a service search response frame associated with embodiments of the present invention.
- the service search request frame and / or the service search response frame will be described later with reference to FIGS. 5A to 5E.
- the control unit 105 typically controls the overall operation of the Wi-Fi device 100.
- FIG. 2 is a diagram illustrating a process of searching for a Wi-Fi device 100 service in a Wi-Fi direct network according to an embodiment of the present invention.
- FIG. 2 shows a first device 100-1 and a second device 100-2.
- a list of services supported by each device 100 is also shown.
- a service supported by the first device 100-1 is Bonjour, a Wi-Fi display, and a Universal Plug and Play (UPnP) Services include Bonjour and WS-Discovery (Web Service Dynamic Discovery).
- the WiFi direct network may include at least one Wi-Fi device including a first device 100-1 and a second device 100-2.
- the Wi-Fi direct network has the same meaning as the Wi-Fi peer-to-peer (P2P) network.
- Wi-Fi devices include devices such as display devices, printers, digital cameras, projectors, and mobile phones.
- Wi-Fi devices within a Wi-Fi direct network can connect directly to each other without using a wireless local area network (WLAN) access point (AP).
- WLAN wireless local area network
- Wi-Fi devices implement a new firmware protocol.
- the first device 100-1 performs a device search 2001 for recognizing the devices 100 before connecting with the second device 100-2 via the WiFi direct network, .
- the first device 100-1 and the second device 100-2 can grasp the services provided by the devices before the WiFi direct network session is established.
- the device search 2001 process uses a probe request frame and a probe response frame to exchange device information.
- the first device 100-1 which desires to search for another Wi-Fi device in the vicinity, transmits the probe request frame to the surroundings and waits for reception of the probe response frame.
- the second device 100-2 generates a probe response frame and transmits the generated probe response frame to the first device 100-1, To perform the device search 2001 process.
- the service discovery 2002 process uses a service discovery request frame and a service discovery response frame to exchange service information provided by each device.
- the service search request frame and the service search response frame are generated using the GAS initial request frame and the GAS initial response frame of the IEEE 802.11u, respectively.
- the respective fields of the service search request frame and the service search response frame will be described later in detail with reference to Figs. 5A to 5E.
- each of the devices 100-1 and 100-2 can acquire information on a service provided by the other party of the service discovery 200.
- FIG. 3 is a diagram illustrating an example of a method for searching for a service provided by a wireless communication group according to an embodiment of the present invention. Referring to FIG.
- wireless communication groups can be formed between devices connected to the network.
- a structure in which a network is connected forms a wireless communication group by one device serving as an owner and a plurality of devices connected to the owner device acting as clients.
- the wireless communication group thus formed only the owner device can connect with a plurality of other devices, and the client device can be connected only with the owner device.
- the second device 100-2 acts as an owner device in FIG. 3, and the third device 100-3 and the fourth device 100-4 serve as the second device 100-2. Is the client device of the device 100-2. Therefore, a wireless communication group composed of the second to fourth devices 100-2 to 100-4 is formed.
- the first device 100-1 when the first device 100-1 searches for a service provided by the wireless communication group, the first device 100-1 first searches for the service provided by the wireless communication group through the device search 2001 process described above with reference to FIG. 2 And then perform a service discovery (2002) process.
- FIG. 4 is a flowchart illustrating a process of searching for a service provided by the wireless communication group of FIG. 3 according to an embodiment of the present invention.
- a service provided by a wireless communication group means service information provided by each device (including an owner device) belonging to a wireless communication group.
- the second to fourth devices 100-2 to 100-4 form a wireless communication group as in the example of FIG. 3, (2001), and the lower process illustrates a service discovery (2002) process.
- the first device 100-1 performs a device search 2001 process with the second device 100-2, which is an owner device of the wireless communication group.
- the first device 100-1 may go through the device search 2001 process described above with reference to FIG. 2.
- the device identification information of the second device 100-2 the second device 100-2 can acquire the information that it is the owner device of the wireless communication group and the identification information of the client device of the wireless communication group.
- the first device 100-1 performs a service discovery 2002 process with each of the devices belonging to the wireless communication group in the service discovery 2002 process.
- a service discovery 2002 process since the process of searching for a service 2002 is the same as that described above with reference to FIG. 2, a detailed process will be omitted.
- the second device 100-2 which is an owner device, performs a service search process 2002a.
- the service discovery process (2002b, 2002c) can be performed with each of the client devices using the identification information of the client device obtained through the device search (2001) process.
- the first device 100-1 obtains the service information provided by each device (second to fourth devices) included in the wireless communication group .
- the service search request frame is used in the service search request 2002-1, and the service search response frame is used in the service search response 2002-2. It is obvious that each of these frames can be equally used in the service search 2002 process in FIG.
- Each of the fields of the service search request frame and the service search response frame will be described in detail below with reference to FIGS. 5A to 5E.
- Each of the fields shown in Figs. 5A to 5E are exemplary fields of a service search request frame and a service search response frame, and need not necessarily be limited thereto.
- 5A to 5E are diagrams illustrating an example of fields of a service search request / search response frame according to an embodiment of the present invention.
- the service discovery request frame and the service discovery response frame are respectively generated using the GAS initial request frame and the GAS initial response frame of 802.11u, and more specifically, the vendor extended field of the GAS initial request / response frame.
- the service TLV field sizes including the "Organizationally Unique Identifier (OUI) Subtype" field of the GAS initial request / response frame and the Type Length Value (TLV) of the service search request / response are 1 octet and variable size (Variable Size).
- the " OUI Subtype " field refers to the identifier assigned to the authority. In the illustrated example, the " OUI Subtype " field has a value of " 0x09 " In the case of the service TLV, the service search request frame (FIG. 5B) and the service search response frame (FIG. 5D) are different from each other.
- 5B is a diagram illustrating an example of a detail field of a service TLV field of a service search request frame.
- the service search request frame is a frame to be transmitted in the service search request 2002-1.
- the service search request frame requests information about services supported by the device receiving the request.
- the service TLV field of the service search request frame includes the fields " Length ", " Service Protocol Type ", " Service Transaction ID “, and " Query data " , 1 and a variable size.
- the " Length" field contains the length value of the service search request TLV.
- the " Service Protocol Type" field includes service protocol type information, which will be described later with reference to FIG. 5C.
- the " Service Transaction ID " field includes an identifier for associating the service search request frame and the service search response frame.
- the " Service Transaction ID " field is set to any value other than 0 when the service discovery request frame is generated.
- the " Query Data” field includes the structure of the service search request frame and the definition of the content. Specific details of this field can be found by referring to IEEE P802.11u [4].
- FIG. 5C is a diagram showing an example of a " Service Protocol Type " field according to an embodiment of the present invention.
- the " Service Protocol Type " field includes a type of a service protocol provided by the Wi-Fi device and whether the entire service is requested.
- the "Service Protocol Type" field uses 8 bits, of which 0 to 6 bits indicate service protocol type information, and the last 7 bits indicate whether a group full service is requested.
- the service protocol type may include a value of one of 0 to 127. 0 is the protocol of all services, 1 is the Bonjour protocol identifier, 2 is the UPnP protocol identifier, 3 is the Wi-Fi display protocol identifier, and 4-127 are reserved for future services.
- This service protocol type is included in the service discovery request frame by being included in the " Service Protocol Type " field. Accordingly, the device receiving the service search request frame can request information on whether the service protocol is supported or not. For example, when the service discovery request frame includes the Bonjour protocol identifier " 1 ", the service discovery request frame requests " information on whether the receiving device supports the Bonjour protocol ". As another example, if the service search request frame includes a protocol identifier of " 0 " of all services, the service search request frame requests " information on all services supported by the receiving device ".
- Whether or not the group total service request is the last 7 bits is a field related to another embodiment of the present invention, which will be described later with the embodiment of FIG. 6.
- 5D is an illustration of an example of a detail field of a service TLV field of a service discovery response frame.
- the service TLV field of the service discovery response frame includes the fields " Length ", " Service Protocol Type ", " Service Transaction ID “, “ Status Code & In turn, have 2, 1, 1, 1, and variable sizes.
- the " Length ", " Service Protocol Type " and " Service Transaction ID” are the same fields as the service TLV of the service search request frame described above with reference to FIG. 5B.
- the " Status Code " field is a field containing status information about the service requested by the service search request frame. Since the 8 bits (1 octet) is used, the value can have a value from 0 to 255. 5E, if the value of the "Status Code" field is 0 (0X00), it indicates that the requested service protocol is available. If the field value is 1 (0X01) Indicating that the service protocol is unavailable. If the field value is 2 (0X10), it indicates that the requested information can not be provided. If the field value is 3 (0X11), the received request is an error message that the request is invalid. If the field value is 4 to 225, it is not defined at present.
- the " Response Data” field may be changed according to the " Service Protocol Type " field of the received service search request frame and the service information type included in the " Query Data Field " That is, the " Response Data " field includes the service information type and related service data requested by the received service search request frame. For example, when a request is made for the support of the " Bonjour " protocol by the received service search request frame, the version of the support protocol and / or the detailed service of the " Bonjour " And may include protocol details such as information.
- the "Bonjour" protocol defines what is specifically included, and WiFi Direct defines only the protocol for sending and receiving it.
- FIG. 5F is a diagram illustrating fields of a " P2P group capability bitmap " according to an embodiment of the present invention, and will be described later with reference to FIG.
- the first device 100-1 which desires to search for a service, It is necessary to perform a service search (2002) process for each device belonging to the service. If each of the devices is subjected to a service discovery 2002 process, there is a risk of waste of power as well as waste of data resources. Particularly, there are many cases of mobile terminals due to characteristics of Wi-Fi direct devices, and waste of electric power in such mobile terminals is one of important issues.
- a service search request is made to the entire group, and a method of collectively grasping the support service of each device belonging to the group is proposed.
- a method of collectively grasping the support service of each device belonging to the group is proposed.
- FIG. 6 is a diagram illustrating an example of a method for collectively grasping support services of devices belonging to a group according to another embodiment of the present invention.
- the example shown in Fig. 6 is a state in which a wireless communication group is formed in which the second device is the owner device and the third and fourth devices are the client devices, as in the example shown in Fig.
- the owner device of the wireless communication group acquires and stores the support service of each of the client devices belonging to the wireless communication group (step 6001).
- the first device 100-1 identifies the second device 100-2 as the owner device of the wireless communication group through the device search 2001 process.
- the second device 100-2 as the group owner device provides the " P2P group capability bitmap " which is the information indicating the property of the group to the first device 100-1.
- the details of the " P2P group capability bitmap " are the same as those of a general WiFi direct network, and will be omitted for the sake of clarity of the present invention.
- the group service search 6001 is a process according to an embodiment of the present invention and is an evolved service discovery process capable of collectively grasping support services of devices belonging to a group.
- the first device 100-1 should be able to identify whether the group to which the second device 100-2 belongs supports the group service discovery 6001 process. Therefore, in the embodiment of the present invention, it is proposed that the above-described " P2P group capability bitmap " includes information on whether or not to support the group service search 6001 process. Therefore, in the present invention, it is proposed to modify the existing " P2P group capability bitmap " field as described below with reference to FIG. 5F.
- FIG. 5F shows a modified " P2P group capability bitmap " according to an embodiment of the present invention.
- the bits 0 to 6 of the " P2P group capability bitmap " are the same as the previously used " P2P group capability bitmap ", and thus a detailed description thereof will be omitted.
- P2P group capability bitmap can be used in beacon transmission, search response, (re) join response, etc. to indicate that it supports the group service search function.
- the first device 100-1 searching for the service can determine whether the group service search 6001 is supported through the " P2P group capability bitmap " of the search target group. Accordingly, the first device 100-1 can transmit the group service search request 6001-1 to the second device 100-2.
- the first device 100-1 When the first device 100-1 undergoes a group service search 6001 process with the second device 100-2, which is the owner device of the group, the first device 100-1 can acquire a service supported by each device belonging to the corresponding wireless communication group have.
- the service search request / response frame used in these embodiments can be modified in the frames described with reference to FIGS. 5A to 5E. This modification will be described in detail with reference to FIG. 5 and FIG.
- a group service search request frame or a general service search request frame is distinguished according to the value of 7Bit, which is the last bit of the "Service Protocol Type" field.
- the second device 100-2 can recognize that the received frame is a general service search request frame. Accordingly, the second device 100-2 receives the general service search response frame, and generates a general service search response frame in response to the received general service search request frame.
- This general service discovery response frame includes only the provided service information of the second device 100-2, as described above with reference to Fig.
- the second device 100-2 recognizes that the received frame is a group service search request frame according to an embodiment of the present invention have. Accordingly, the second device 100-2 receives the group service search request frame, and generates a group service search response frame in response to the received group service search request frame.
- This group service search response frame includes all of the provided service information of each device belonging to the wireless communication group.
- FIGS. 7A to 7C an example of a field structure of a group service search response frame according to an embodiment of the present invention will be described with reference to FIGS. 7A to 7C.
- FIG. 7 is a diagram illustrating an example of a field structure of a group service search response frame according to an embodiment of the present invention.
- the basic structure of the group service discovery response frame is similar to that of the general service discovery response frame, and in FIG. 7, the difference from the general service discovery response frame is mainly described.
- an example of the basic structure to be described with reference to FIG. 7 is the same as the basic structure of the service search frame shown in FIG. 5A.
- FIG. 7A shows an example of a detail field of the " service TLV " field of the group service response frame.
- the detail field of the "service TLV” field shown in FIG. 7A includes "Length”, “Service Protocol Type”, “Service Transaction ID”, “Status Code”, and "Response data for Group” In turn, 2, 1, 1, 1 and variable size.
- 7B is a diagram showing an example of a "Response Data for Group” field 701 according to an embodiment of the present invention. 7B illustrates a case where the "Response Data for Group” field 701 contains one piece of support service information.
- Response Data for Group field 701 covers information on various devices in a lump, information 7001 identifying the device and support service information (Response Data) of the device are stored in correspondence with each other.
- identification information 7001 for the second device is included.
- the device identification information 7001 can be divided into fields of "Attribute ID", “Length” and "P2P device address” in detail.
- the " Attribute ID” field is generally the same as the field used in Wi-Fi direct network and includes property information of P2P network.
- the " Length" field contains length information of a subfield corresponding to each device.
- the "P2P device address” field contains the hardware address of the device. In the example shown in Fig. 7B, the " P2P device address " field is filled with the hardware address of the second device 100-2.
- the " Response Data” field is the same as described above in Fig. 5D. That is, it can be changed according to the service protocol type field of the received service search request frame and the service information type included in the " Query Data Field " field.
- the " Response Data " field includes the service information type and related service data requested by the received service search request frame.
- FIG. 7C is a diagram illustrating a detailed field structure including a support service for various devices in the " Response Data for Group " field 701.
- the second device 100-2 which is the owner device, represents a service search response frame generated in response to the request for information on whether the " UPnP " protocol service is supported.
- the " Response Data for Group " field 701 includes support services for the three devices (second to fourth devices).
- the " Response Data for Group " field 701 in the embodiment of the present invention serially connects the detailed fields for each device described in FIG. Can be configured.
- the detailed fields for each device include information 7001 for identifying the device and support service information (Response Data) of the device.
- the group service discovery response frame shown in FIG. 7C is a response frame for the second to fourth devices 100-2 to 100-4 when judged based on the information included in the " Response Data for Group " field 701, UPnP " service protocol, and the version and / or detailed service contents for the " UPnP " service protocol can additionally be determined through the respective " Response Data "
- the support services of the devices belonging to the wireless communication group can be grasped collectively.
- Wi-Fi display services can not make additional connections other than a 1: 1 connection. Accordingly, when a specific device is communicating using a Wi-Fi display service in a wireless communication group, the connection is refused if an additional Wi-Fi display connection is attempted to such a device.
- FIG. 8 is a diagram illustrating an example of a group service discovery process according to another embodiment of the present invention. Referring to FIG. In the example shown in Fig. 8, a wireless communication group in which the second device 100-2 is the owner device is formed as in Fig.
- the third device 100-3 and the fourth device 100-4 establish a session using a Wi-Fi display protocol.
- the second device 100-2 which is the owner device, not only supports the respective services of the devices belonging to the current group, To the first device 100-1, further including whether or not the support services are currently available.
- an embodiment of the present invention proposes to use the " Status Code" field in the service TLV of the group service search response frame of FIG. 7A.
- FIG. 9 is a diagram showing an example of including information on whether or not the " Status Code " field in the service TLV of the group service search response frame is currently available according to an embodiment of the present invention.
- the "Status Code” field shown in FIG. 9 has a value common to the "Status Code” field shown in FIG. 5E. That is, when the value of the " Status Code " field is 0 to 3, it is the same as that shown in FIG. 5E, and a detailed description thereof will be omitted.
- the group service search response frame includes information that the service protocol is currently available. If the value of the " Status Code " field is “ 5 ", the group service search response frame includes information that the corresponding service protocol is currently unavailable. If the value of the " Status Code " field is " 6 ", the group service search response frame includes information that the service protocol is currently available or uncertain.
- not only the support service of each device in the wireless communication group but also whether or not the support service is currently available is provided.
- FIG. 10 is a diagram illustrating an example of a method for providing information that can update the support service when a change occurs in the support service according to another embodiment of the present invention.
- a wireless communication group having the second device 100-2 as an owner device is formed in the same manner as in Fig.
- the second device 100-2 has provided the first device 100-1 with the support services and currently available service information of the devices in the wireless communication group.
- the third device 100-3 and the fourth device 100-4 have established a session using the Wi-Fi display protocol at the point of providing the second device 100-2, 100-1 includes information indicating that the Wi-Fi display protocols of the third device 100-3 and the fourth device 100-4 are currently unavailable.
- the service search response frame is periodically transmitted to the first device 100-1, and the updated service search response frame is updated Including information that can be used to identify the user.
- FIG. 11A A detailed structure of a frame including information for identifying whether or not to update will be described with reference to FIG. 11A.
- 11A is a diagram showing an example of a " Status Code " field included in a service search response frame according to another embodiment of the present invention.
- the 8 bits constituting the " Status Code " field in one embodiment of the present invention can be divided into two areas. 0 to 6 bits include information used in the past, and the last bit, 7 bits, indicates that the supported service information and / or the currently available service information have been updated according to the embodiment of the present invention.
- the first device 100-1 determines that the supported service information and / or the currently available service information have been updated. Then, the first device 100-1 can analyze the remaining service search response frame to grasp the updated information.
- the first device 100-1 determines that the supported service information and / or the currently available service information have not been changed. Then, the first device 100-1 can utilize the existing support service information and / or the currently available service information as it is.
- the service search response frame is periodically transmitted to the first device 100-1 in order to update the service utilization state to be changed.
- a service update notification frame is newly defined, and a service update notification frame is periodically transmitted.
- the service update notification frame will be described with reference to Figs. 11B and 11C.
- 11B is a diagram illustrating an example of a service update notification frame according to an embodiment of the present invention.
- the basic structure of the service update notification frame conforms to the basic structure of the "P2P public action field", where the defined "OUI Subtype” is designated as 9 for "service discovery”.
- the " Update data" field includes information on whether or not the update is to be used in the embodiment of the present invention, and will be described with reference to the detailed fields in FIG. 11C.
- the "Update data” field may include subfields of "Service Update Indicator”, “Length”, “Service Protocol Type”, “Service Transaction ID”, “Status Code”, and “Update data”.
- the " Service Update Indicator” field is data having a size of 2 octets and is information that can be updated by incrementing by 1 each time there is an update.
- the " Length” field may include the full length information of the " Update data " field.
- the " Service Protocol Type" field is set for the supportable service protocol type defined in P2P.
- the " Service Transaction ID " field includes an identifier for associating the service search request frame and the service search response frame.
- the " Service Transaction ID " field is set to any value other than 0 when the service discovery request frame is generated.
- the " Status Code” field is the same as that described above with reference to FIG. 11A, and when the service support status is updated, information indicating that the status is updated is included in the last 7 bits.
- the newly defined service update notification frame described with reference to FIG. 11B and FIG. 11C is periodically transmitted to another device, and when the utilization state of the service is changed, the other device is proposed to update the changed state have.
- the embodiments of the present invention perform different roles depending on the owner device and the client device of the wireless communication group. Particularly, in the embodiments of the present invention described below, an example in which a universal serial bus (USB) service protocol is supported using a Wi-Fi direct network will be described.
- USB universal serial bus
- a method of determining a host device and a client device to be formed when forming a wireless communication group, particularly when using a USB service protocol is proposed.
- the formed wireless communication group supports the USB service using the Wi-Fi direct network.
- the connected devices are called Wi-Fi USB (WSB).
- the USB service protocol distinguishes between a host device (WSB host) and a docking device (WSB dock) between two devices establishing a connection.
- the host device controls the poison device to perform reading and / or writing operations on the data contained in the poison device or controlling the poison device.
- a Lap top 1201 can serve as a host device or a poison device when connected by a USB service protocol. This is because, in the case of the laptop 1201, it is possible to control other connected devices using a CPU (Central Processing Unit) and other peripheral devices capable of controlling other devices, and to read and write data, can do. In addition, since the laptop 1201 includes a memory, it can also serve as a docking device.
- a CPU Central Processing Unit
- the WSB 1202 shown in FIG. 12A if it is assumed that there is no control unit capable of controlling other devices, the WSB 1202 can not serve as a host device. Therefore, in such a case, it can not help but play a role as a poison device.
- FIG. 12 (a) when the laptop 1201 and the WSB dock 1202 use the USB service protocol using the Wi-Fi direct network, the laptop 1201 acts as a host device and the WSB .
- the laptop 1201 is connected to the digital camera 1203 via a Wi-Fi direct network and provides a USB service protocol.
- the laptop 1201 can serve as a host device since it does not control other generally connected devices.
- the laptop 1201 generally serves as an owner device. Because the owner device can connect a plurality of client devices, most of the owner devices are responsible for devices having high data processing capability. Further, since the owner device has to establish a plurality of connections, the owner device takes charge of the owner device as the power supply is as desired.
- FIG. 13 is a diagram illustrating an example of a method of associating a host / dock device in a USB service protocol with an owner / client device on a Wi-Fi direct network according to an embodiment of the present invention.
- one of two devices using a USB service protocol supports only a host device, and the other describes a method of mapping an owner / client device when the device supports only a single device have.
- the host device is set as the owner device and the poison device is set as the client device. This is because the host device is advantageous because the owner device can establish a WiFi direct network connection with a plurality of devices as described above.
- FIG. 14 a process of setting a group as an owner device will be described with reference to FIG. 13 (a).
- FIG. 14 is a flowchart illustrating a method of setting an owner / client device when one of two devices providing a USB service protocol supports only a host device and the other supports only a dock device.
- WS-IE Wi-Fi USB Information Elements
- a beacon transmission area is upwardly positioned on the line 1303, and a device search process is performed downward.
- the device attempting connection transmits a beacon signal to another device, and waits for a response to the transmitted beacon signal.
- the beacon signal including the WSB IE it is proposed to transmit the beacon signal including the WSB IE. That is, since the beacon signal in the example shown in Fig. 14 is a beacon signal transmitted by the host device 1300-1, the WSB IE included in the beacon signal indicates that the transmitting device supports only the host device And may include information indicating the type of the device.
- the poi device 1300-2 receives the beacon signal.
- the received dock device 1300-2 can acquire information that the device 1300-1 that has transmitted the beacon signal supports only the host device through the WSB IE included in the beacon signal.
- the sink device receiving the beacon signal then transmits a search request 1302-1 including its own WSB IE to the host device 1300-1 in response to the beacon signal in the device search process.
- the WSB IE included in the search request 1302-1 includes information that the poison device itself can support only the poison device.
- the two devices wishing to establish a Wi-Fi direct network can obtain information that each other can support by exchanging the WSB IE.
- the owner / client of the wireless communication group can be set using the acquired information.
- a transmission including the WSB IE is transmitted at the time of beacon transmission.
- the beacon transmission is performed using the search request 1302-1 and the search response 1302-2 You can also exchange WSB IEs.
- both of the devices using the USB service protocol support both the host device and the dock device.
- a method of acquiring WSB IE, which is attribute information of each of the two devices, and setting the WSB IE as an owner device or a client device in accordance with the attribute information is proposed.
- the WSB IE which is the attribute information will be described below with reference to Fig.
- 15A is a diagram illustrating fields of a WS-IE (Wi-Fi USB Information Elements) according to an exemplary embodiment of the present invention.
- WS-IE Wi-Fi USB Information Elements
- the WSB IE may include "Elements ID”, “Length”, “OUI”, “OUI Type” and “WSB Subelements”, and the size of each field in the example shown in FIG. 1 and a variable size.
- the " WSB Subelements " field is a field including attribute information of the WSB connection according to an embodiment of the present invention. The detailed field structure will be described with reference to FIG. 15B.
- 15B shows an example of a specific detail field of a " WSB Subelements " field according to an embodiment of the present invention.
- the detail fields of the " WSB Subelements " field may include " Subelement ID ", " Length ", and " Subelements body field ".
- the " Subelement ID” field indicates a field for identifying the format of the " WSB Subelements " field.
- the " Length” field contains the length information of the entire " Subelement ID " field.
- the "Subelements body field" is a field including attribute information of the WSB connection according to an embodiment of the present invention, and the detail field will be described in FIG. 15C.
- 15C is a diagram showing an example of a detail field of the " Subelements body field ".
- the " Subelement ID” field indicates a field for identifying the format of the " WSB Subelements " field.
- the " Length” field contains the length information of the entire " Subelements body field " field.
- WSB Device Information uses 8 bits and shows attribute information of the WSB connection. The concrete bit structure will be described with reference to Fig. 15D.
- 15D is a diagram showing an example of the bit structure of " WSB Device Information " according to an embodiment of the present invention.
- "WSB Device Information” uses 8 bits. Of these bits, 0 to 1 bit are device property information, 2 to 3 bits are device preferred operation information, 4 to 5 bits are WSB pairing support information, 6 bits are WSB service discovery support information And 7 ⁇ 8bit is left without defining.
- 0 to 1 bits indicating the property information of the device may have a value of 0 to 3.
- the value of the property information of the device is " 0 ", it indicates that the WSB device supports only the host device.
- the value of the property information of the device is “ 1 ", it indicates that the WSB device supports only the poison device.
- the value of the property information of the device is " 2 ", it indicates that the WSB device is capable of supporting both the host and the poison device.
- the 2 to 3 bits indicating the device's preferred operation information may have a value of 0 to 3, indicating that when the value of the device's preferred operation information is "0", the WSB device wants to operate as a host device .
- the value of the preferred operation information of the device When the value of the preferred operation information of the device is " 1 ", it indicates that the WSB device desires to operate as a dock device. When the value of the preferred operation information of the device is " 2 ", it indicates that the WSB device can operate as either a host device or a docking device.
- Such a preferred operation may vary depending on the power supply level. That is, even when the power supply is smooth (for example, when the power supply is connected to the outlet and the power supply is smooth), there is no fear of electric power even when the power supply is operated as a host. However, if the power supply is not smooth (for example, in the case of a mobile terminal, especially when there is a small amount of residual power), the device may prefer to operate as a docking device. Therefore, in the embodiment of the present invention, it is possible to appropriately determine the owner device or the client device by changing the preferred operation information.
- the 4 to 5 bits indicating WSB pairing support information can have a value of 0 to 3. When the value of the WSB pairing support information is " 0 ", it indicates that the WSB pairing function is not currently supported. If the value of the WSB pairing support information is " 1 ", it indicates that the WSB pairing function is currently supported.
- the 6 bits indicating the WSB service discovery support information may have a value of 0 to 3.
- the WSB service discovery support information refers to information indicating whether the owner / client device can be determined in the wireless communication group by exchanging WSB IE information as in the embodiment of the present invention.
- FIG. 15D specific information included in " WSB Device Information " has been described.
- the information included in "WSB Device Information” when using the property information of the device, it can be confirmed whether the device supports only the host device, only the dock device, or both the host and the dock device. Further, it can be seen whether the user prefers operation to the host device or to the poison device.
- Figs. 16 and 17 examples in which the host device and the dock device are set as the owner / client device by using such information will be described.
- 16 and 17 are flowcharts of a WSB connection establishment process for explaining an embodiment of the present invention.
- FIG. 16 is a diagram illustrating a process of establishing a connection between a C device 1300-3 capable of supporting only a host device and a D device 1300-4 capable of supporting both a host device and a host device.
- the upper part of the boundary line is a search process with reference to a boundary line
- the lower part of the boundary line shows a process of group negotiation.
- the C device 1300-3 and the D device 1300-4 can exchange WSB IEs with each other. That is, the WSB IE can be exchanged through the search request 1302-1 and the search response 1302-2. Therefore, it is possible to recognize functions that each party can support.
- the D device 1300-4 can confirm that the C device 1300-3 supports only the host device through the WSB IE sent in the search process.
- connection may be established or the connection may not be established according to the preferred operation information. This is because the C device 1300-3 can support only the host device, since the D device 1300-4 can only favor the role as the host device.
- the connection between the C device 1300-3 and the D device 1300-4 is not established.
- the preferred operation information of the D device 1300-4 is desired to operate as a poison device or it does not matter which device is operated, a connection can be established.
- the C device 1300-3 can be connected as a host device, and the D device 1300-4 can be connected as a dock device.
- Step 1501 when the C device 1300-3 serves as a host device and the D device 1300-4 serves as a dock device, a group negotiation (Step 1501).
- the C device 1300-3 sets its own group owner intent value to the maximum (step 1502), and the D device 1300-4 sets its own group owner intent value
- the tent value (Group Owner Intent Value) is set to the minimum value (Step 1503).
- the C device 1300-3 is set as the owner device, and the D device 1300-4 can be set as the client device.
- the owner and the client in the wireless communication group can be determined efficiently by judging the property of each device using the WSB IE of each device.
- 17 is a diagram illustrating a process of establishing connection between an E device 1300-5 capable of supporting only a poison device and an F device 1300-6 capable of supporting both a host and a poison device.
- the upper part of the boundary line is a searching process with reference to a boundary line
- the lower part of the boundary line shows a process of group negotiation.
- the E device 1300-5 and the F device 1300-6 can exchange each other's WSB IEs. That is, the WSB IE can be exchanged through the search request 1302-1 and the search response 1302-2. Therefore, it is possible to recognize functions that each party can support.
- the F device 1300-6 can confirm that the E device 1300-5 supports only the poison device through the WSB IE sent in the search process.
- connection may be established or the connection may not be established according to the preferred operation information. This is because the E device 1300-5 can only support the poison device, since the F device 1300-6 can only favor its role as a poison device.
- the connection between the E device 1300-5 and the F device 1300-6 is not established.
- the preference operation information of the F device 1300-6 is desired to operate as a host device or does not matter which device to operate, a connection can be established. And in that connection, the E device 1300-5 can be connected as a poison device, and the F device 1300-6 can be connected as a host device.
- Step 1601 when the E device 1300-5 acts as a poison device and the F device 1300-6 acts as a host device, the group negotiation (Step 1601).
- the E device 1300-5 sets its own group owner intent value to the minimum (step 1602), and the F device 1300-6 sets its own group owner intent value
- the tent value (Group Owner Intent Value) is set to the maximum value (step 1603).
- the E device 1300-5 is set as a client device, and the F device 1300-6 can be set as an owner device.
- the owner and the client in the wireless communication group can be determined efficiently by judging the property of each device using the WSB IE of each device.
- FIG. 18 is a flowchart illustrating a method for determining an owner / client device according to an embodiment of the present invention.
- step S1701 the first device and the second device, which are two devices to establish a connection, set a preferred operation mode.
- the device search process is performed by any one of the first device and the second device. In the following example, the case where the search process is performed by the first device will be described as an example.
- the first device searches for the second device.
- the first device transmits its WSB IE to the second device. And receives the WSB IE from the second device in step S1704. From steps S1702 and S1703, each device can acquire the WSB IE information of the partner device.
- step S1705 it is determined what property information of the device is in the exchanged WSB IE. If the value of the detected device property information is not "0b10", the process proceeds to step S1706. If the detected device property information value is "0b10", the process proceeds to step S1707.
- step S1706 each device stops the search process and returns to the device search mode (step S1702).
- each device determines device preference operation information of the WSB IE. If the value of the device preference operation is not " 0b10 ", the process proceeds to step 1708. If the value of the device preference operation is " 0b10 ", the process proceeds to step 1709.
- step S1708 each device stops the search process and returns to step S1702.
- each device enters a group negotiation process.
- each device is changed according to the preferred operation information of the WSB IE (step S1710). If the preferred operation information is " 0b00 " in step S1710 (host operation is preferred), the host device is set. If the preferred operation information is " 0b01 "
- the present invention described above can be embodied as computer-readable codes on a medium on which a program is recorded.
- the computer readable medium includes all kinds of recording devices in which data that can be read by a computer system is stored. Examples of the computer-readable medium include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage, and the like, and also implemented in the form of a carrier wave (for example, transmission over the Internet) Includes
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Abstract
Description
Claims (18)
- 와이파이 네트워크 상의 디바이스가, 무선 통신 그룹에 속해있는 디바이스 각각이 지원하는 서비스를 탐색하기 위한 서비스 탐색 요청 프래임(Service discovery request frame)을 생성하는 단계;상기 디바이스가 상기 생성된 서비스 탐색 요청 프래임을 상기 무선 통신 그룹에 속한 디바이스 중 오너 디바이스에게 송신하는 단계; 및상기 디바이스가 상기 서비스 탐색 요청 프래임에 대한 응답으로, 상기 무선 통신 그룹에 속해있는 디바이스 각각이 지원하는 서비스 정보를 포함한 서비스 탐색 응답 프래임(Service discovery response frame)을 상기 오너 디바이스로부터 수신하는 단계를 포함하는 그룹 서비스 탐색 방법.
- 제 1 항에 있어서,상기 서비스 탐색 응답 프래임은,상기 무선 통신 그룹에 속해있는 디바이스 각각의 디바이스 식별 정보를 더 포함하고,상기 각각의 디바이스 식별 정보에 대응되도록 상기 지원하는 서비스 정보를 포함하는 그룹 서비스 탐색 방법.
- 제 1 항에 있어서,상기 서비스 탐색 요청 프래임은 소정 서비스를 나타내는 서비스 식별 정보를 포함하고,상기 지원하는 서비스 정보는 상기 소정 서비스를 지원하는지 여부에 대한 정보를 포함하는 그룹 서비스 탐색 방법.
- 제 1 항에 있어서,상기 서비스 탐색 응답 프래임은 상기 무선 통신 그룹에 속해있는 디바이스 각각이 지원하는 서비스 정보가 현재 사용 가능한지 여부를 나타내는 정보를 더 포함하는 그룹 서비스 탐색 방법.
- 제 4 항에 있어서,상기 현재 사용 가능한지 여부를 나타내는 정보는,현재 서비스가 사용 가능, 현재 서비스가 사용 불가능 및 현재 서비스가 사용 가능한지 여부가 불투명 중 어느 하나인 경우를 나타내는 그룹 서비스 탐색 방법.
- 제 1 항에 있어서,상기 수신하는 단계는 주기적으로 상기 서비스 탐색 응답 프래임을 수신하고,상기 서비스 탐색 응답 프래임은 서비스 상태 변경 여부를 나타내는 정보를 더 포함하고,상기 디바이스가, 상기 서비스 상태 변경 여부를 나타내는 정보에 기초하여 상기 서비스 상태가 변경되었다고 판단 할 경우, 상기 무선 통신 그룹에 속해있는 디바이스 각각이 지원하는 서비스 정보를 갱신하는 단계를 더 포함하는 그룹 서비스 탐색 방법.
- 제 1 항에 있어서,상기 무선 통신 그룹에 속해있는 디바이스 각각은, 상기 오너 디바이스와 와이파이 다이렉트 네트워크(Wi-Fi Direct Network)를 통해 무선으로 연결된 그룹 서비스 탐색 방법.
- 제 1 항에 있어서,상기 서비스 탐색 요청 프래임 및 상기 서비스 탐색 응답 프래임은 각각 IEEE(Institute of Electrical and Electronics Engineers) 802.11u의 GAS(Generic Advertisement Service)를 이용하여 생성한 그룹 서비스 탐색 방법.
- 소정 디바이스에게 무선 통신 그룹이 지원하는 서비스 정보를 제공하는 방법에 있어서,상기 무선 통신 그룹에 속해있는 디바이스 각각이 지원하는 서비스를 탐색하기 위한 서비스 탐색 요청 프래임(Service discovery request frame)을 오너 디바이스가 상기 소정 디바이스로부터 수신하는 단계;상기 수신된 서비스 탐색 요청 프래임에 대응하여, 상기 무선 통신 그룹에 속해있는 디바이스 각각이 지원하는 서비스 정보를 포함한 서비스 탐색 응답 프래임(Service discovery response frame)을 상기 오너 디바이스가 생성하는 단계; 및상기 오너 디바이스가 상기 생성된 서비스 탐색 응답 프래임을 상기 소정 디바이스로 송신하는 단계를 포함하는 그룹 서비스 정보 제공 방법.
- 제 9 항에 있어서,상기 서비스 탐색 응답 프래임은,상기 무선 통신 그룹에 속해있는 디바이스 각각의 디바이스 식별 정보를 더 포함하고,상기 각각의 디바이스 식별 정보에 대응되도록 상기 지원하는 서비스 정보를 포함하는 그룹 서비스 정보 제공 방법.
- 제 9 항에 있어서,상기 서비스 탐색 요청 프래임은 소정 서비스를 나타내는 서비스 식별 정보를 포함하고,상기 지원하는 서비스 정보는 상기 소정 서비스를 지원하는지 여부에 대한 정보를 포함하는 그룹 서비스 정보 제공 방법.
- 제 9 항에 있어서,상기 서비스 탐색 응답 프래임은 상기 무선 통신 그룹에 속해있는 디바이스 각각이 지원하는 서비스 정보가 현재 사용 가능한지 여부를 나타내는 정보를 더 포함하는 그룹 서비스 정보 제공 방법.
- 제 12 항에 있어서,상기 현재 사용 가능한지 여부를 나타내는 정보는,현재 서비스가 사용 가능, 현재 서비스가 사용 불가능 및 현재 서비스가 사용 가능한지 여부가 불투명 중 어느 하나인 경우를 나타내는 그룹 서비스 정보 제공 방법.
- 제 9 항에 있어서,상기 서비스 탐색 응답 프래임은 서비스 상태 변경 여부를 나타내는 정보를 더 포함하고,상기 송신하는 단계는 주기적으로 상기 서비스 탐색 응답 프래임을 상기 소정 디바이스에 송신하고,상기 서비스 상태 변경 여부를 나타내는 정보에 기초하여 상기 서비스 상태가 변경되었음이 판단 시, 상기 무선 통신 그룹에 속해있는 디바이스 각각이 지원하는 서비스 정보를 상기 소정 디바이스가 갱신하는 단계를 더 포함하는 그룹 서비스 정보 제공 방법.
- 제 9 항에 있어서,상기 무선 통신 그룹에 속해있는 디바이스 각각은, 상기 오너 디바이스와 와이파이 다이렉트 네트워크(Wi-Fi Direct Network)를 통해 무선으로 연결된 그룹 서비스 정보 제공 방법.
- 제 9 항에 있어서,상기 서비스 탐색 요청 프래임 및 상기 서비스 탐색 응답 프래임은 각각 IEEE(Institute of Electrical and Electronics Engineers) 802.11u의 GAS(Generic Advertisement Service)를 이용하여 생성한 그룹 서비스 정보 제공 방법.
- 무선 통신 그룹에 속해있는 디바이스 각각이 지원하는 서비스를 탐색하기 위한 서비스 탐색 요청 프래임(Service discovery request frame)을 생성하는 프래임 생성부;상기 생성된 서비스 탐색 요청 프래임을 상기 무선 통신 그룹에 속한 디바이스 중 오너 디바이스에게 송신하는 프래임 송신부; 및상기 서비스 탐색 요청 프래임에 대한 응답으로, 상기 무선 통신 그룹에 속해있는 디바이스 각각이 지원하는 서비스 정보를 포함한 서비스 탐색 응답 프래임(Service discovery response frame)을 상기 오너 디바이스로부터 수신하는 프래임 수신부를 포함하는 무선 통신 그룹이 지원하는 서비스 탐색 디바이스.
- 소정 디바이스에게 무선 통신 그룹이 지원하는 서비스 정보를 제공하는 오너 디바이스에 있어서,상기 무선 통신 그룹에 속해있는 디바이스 각각이 지원하는 서비스를 탐색하기 위한 서비스 탐색 요청 프래임(Service discovery request frame) 상기 소정 디바이스로부터 수신하는 프래임 수신부;상기 수신된 서비스 탐색 요청 프래임에 대응하여, 상기 무선 통신 그룹에 속해있는 디바이스 각각이 지원하는 서비스 정보를 포함한 서비스 탐색 응답 프래임(Service discovery response frame)을 생성하는 프래임 생성부; 및상기 생성된 서비스 탐색 응답 프래임을 상기 소정 디바이스로 송신하는 프래임 송신부를 포함하는 오너 디바이스.
Priority Applications (2)
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KR1020147012234A KR102081936B1 (ko) | 2011-11-15 | 2012-11-14 | 와이파이 다이렉트 네트워크를 통한 지원 서비스 탐색 방법 및 디바이스 |
US14/358,621 US9485719B2 (en) | 2011-11-15 | 2012-11-14 | Method and device for searching for supported service through WiFi direct network |
Applications Claiming Priority (4)
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US201161560261P | 2011-11-15 | 2011-11-15 | |
US201161560269P | 2011-11-15 | 2011-11-15 | |
US61/560,269 | 2011-11-15 | ||
US61/560,261 | 2011-11-15 |
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WO2013073838A1 WO2013073838A1 (ko) | 2013-05-23 |
WO2013073838A4 true WO2013073838A4 (ko) | 2013-07-18 |
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PCT/KR2012/009608 WO2013073838A1 (ko) | 2011-11-15 | 2012-11-14 | 와이파이 다이렉트 네트워크를 통한 지원 서비스 탐색 방법 및 디바이스 |
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US (1) | US9485719B2 (ko) |
KR (1) | KR102081936B1 (ko) |
WO (1) | WO2013073838A1 (ko) |
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WO2014025217A1 (en) | 2012-08-08 | 2014-02-13 | Samsung Electronics Co., Ltd. | Apparatus and method of connecting service according to user intention |
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EP2901799B1 (en) * | 2012-09-28 | 2017-07-12 | Samsung Electronics Co., Ltd. | Method and system for establishing wireless fidelity direct(wfd) connection in a wfd network environment |
US9408137B2 (en) * | 2012-10-22 | 2016-08-02 | Electronics And Telecommunications Research Institute | Discovery signal transmitted in direct communication system, and method of transmitting/receiving the discovery signal |
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JP6172954B2 (ja) * | 2013-01-25 | 2017-08-02 | キヤノン株式会社 | 通信装置、通信装置の制御方法、プログラム |
JP6271839B2 (ja) * | 2013-01-25 | 2018-01-31 | キヤノン株式会社 | 通信装置、通信装置の制御方法、プログラム |
JP6253250B2 (ja) * | 2013-05-01 | 2017-12-27 | キヤノン株式会社 | 通信装置、通信装置の制御方法、プログラム |
KR20150017848A (ko) * | 2013-08-08 | 2015-02-23 | 삼성전자주식회사 | 와이파이 다이렉트 연결 방법 및 장치 |
US20160219423A1 (en) * | 2013-08-20 | 2016-07-28 | Lg Electronics Inc. | Method for remotely controlling another device using direct communication and apparatus therefor |
US10045387B2 (en) | 2014-01-22 | 2018-08-07 | Lg Electronics Inc. | Method for constructing docking protocol by using direct communication, and apparatus therefor |
US10129343B2 (en) | 2014-01-22 | 2018-11-13 | Lg Electronics Inc. | Method for searching for docking service and peripheral function by using direct communication and apparatus for same |
US10206233B2 (en) * | 2014-03-04 | 2019-02-12 | Samsung Electronics Co., Ltd | Method and apparatus for automatic switching between devices |
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KR20170083762A (ko) * | 2016-01-11 | 2017-07-19 | 삼성전자주식회사 | 근접 무선 통신 방법 및 장치 |
WO2017123253A1 (en) * | 2016-01-15 | 2017-07-20 | Hewlett Packard Enterprise Development Lp | Generating peer-to-peer network addresses |
US10594785B2 (en) * | 2016-03-11 | 2020-03-17 | Intel Corporation | Transitioning from an infrastructure based wireless connection to a peer to peer (P2P) wireless connection |
KR102599479B1 (ko) * | 2016-11-02 | 2023-11-08 | 삼성전자주식회사 | 근거리통신 연결을 위한 전자장치, 시스템 및 방법 |
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CN110034941A (zh) * | 2019-03-22 | 2019-07-19 | 北京众纳鑫海网络技术有限公司 | 加入特定于设备的消息群组的方法和系统 |
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US20030140119A1 (en) * | 2002-01-18 | 2003-07-24 | International Business Machines Corporation | Dynamic service discovery |
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US20110105024A1 (en) * | 2009-11-03 | 2011-05-05 | Nokia Corporation | Transport independent service discovery |
US8599773B2 (en) * | 2009-11-17 | 2013-12-03 | Samsung Electronics Co., Ltd. | Method and system for selective scalable channel-based station enablement and de-enablement in television band white spaces |
JP5718933B2 (ja) * | 2009-11-17 | 2015-05-13 | サムスン エレクトロニクス カンパニー リミテッド | WiFiDirectネットワークでのWiFiディスプレイサービス探索方法及び装置 |
KR101700937B1 (ko) | 2009-12-22 | 2017-01-31 | 삼성전자주식회사 | WiFi Direct 네트워크에서의 서비스 탐색 방법 및 장치 |
-
2012
- 2012-11-14 KR KR1020147012234A patent/KR102081936B1/ko active IP Right Grant
- 2012-11-14 US US14/358,621 patent/US9485719B2/en not_active Expired - Fee Related
- 2012-11-14 WO PCT/KR2012/009608 patent/WO2013073838A1/ko active Application Filing
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KR102081936B1 (ko) | 2020-04-14 |
US9485719B2 (en) | 2016-11-01 |
KR20140098070A (ko) | 2014-08-07 |
US20140314065A1 (en) | 2014-10-23 |
WO2013073838A1 (ko) | 2013-05-23 |
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