WO2017105071A1 - Procédé et dispositif permettant d'exécuter une découverte de service via nfc dans un système de communications sans fil - Google Patents

Procédé et dispositif permettant d'exécuter une découverte de service via nfc dans un système de communications sans fil Download PDF

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WO2017105071A1
WO2017105071A1 PCT/KR2016/014626 KR2016014626W WO2017105071A1 WO 2017105071 A1 WO2017105071 A1 WO 2017105071A1 KR 2016014626 W KR2016014626 W KR 2016014626W WO 2017105071 A1 WO2017105071 A1 WO 2017105071A1
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service
terminal
information
handover
record
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PCT/KR2016/014626
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English (en)
Korean (ko)
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이병주
박기원
김동철
조영준
임태성
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엘지전자 주식회사
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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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management

Definitions

  • the present disclosure relates to a wireless communication system, and more particularly, to a method and apparatus for performing service discovery using near field communication (NFC) in a wireless communication system.
  • NFC near field communication
  • Wireless communication systems are widely deployed to provide various kinds of communication services such as voice and data.
  • a wireless communication system is a multiple access system capable of supporting communication with multiple users by sharing available system resources (bandwidth, transmission power, etc.).
  • multiple access systems include code division multiple access (CDMA) systems, frequency division multiple access (FDMA) systems, time division multiple access (TDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, and single carrier frequency (SC-FDMA).
  • CDMA code division multiple access
  • FDMA frequency division multiple access
  • TDMA time division multiple access
  • OFDMA orthogonal frequency division multiple access
  • SC-FDMA single carrier frequency division multiple access
  • MCD division multiple access
  • MCDMA multi-carrier frequency division multiple access
  • MC-FDMA multi-carrier frequency division multiple access
  • WLAN is based on radio frequency technology, and can be used in homes, businesses, or businesses by using portable terminals such as personal digital assistants (PDAs), laptop computers, and portable multimedia players (PMPs). It is a technology that allows wireless access to the Internet in a specific service area.
  • PDAs personal digital assistants
  • PMPs portable multimedia players
  • IEEE 802.11a and b use an unlicensed band at 2.4. GHz or 5 GHz, IEEE 802.11b provides a transmission rate of 11 Mbps, and IEEE 802.11a provides a transmission rate of 54 Mbps.
  • IEEE 802.11g applies Orthogonal Frequency Division Multiplexing (OFDM) at 2.4 GHz to provide a transmission rate of 54 Mbps.
  • IEEE 802.11n provides a transmission rate of 300 Mbps by applying multiple input multiple output OFDM (MIMO-OFDM). IEEE 802.11n supports a channel bandwidth of up to 40 MHz, in which case it provides a transmission rate of 600 Mbps.
  • OFDM Orthogonal Frequency Division Multiplexing
  • IEEE 802.11p is a standard for supporting WAVE (Wireless Access in Vehicular Environments). For example, 802.11p provides the improvements needed to support Intelligent Transportation Systems (ITS).
  • IEEE 802.11ai is a standard for supporting fast initial link setup of an IEEE 802.11 station (STA).
  • the DLS (Direct Link Setup) related protocol in a wireless LAN environment according to IEEE 802.11e is based on QBSS (Quality BSS) in which a Basic Service Set (BSS) supports Quality of Service (QoS).
  • QBSS Quality BSS
  • APs QAPs (Quality APs) supporting QoS.
  • WLAN environment for example, WLAN environment according to IEEE 802.11a / b / g
  • the AP supports QoS even if the Non-AP STA is a QSTA (Quality STA) supporting QoS.
  • Most legacy APs do not.
  • the QSTA there is a limit that can not use the DLS service.
  • Wi-Fi Direct wireless short-range communication technologies such as Wi-Fi are widely applied to the market, and the connection between devices is not only based on a local network but also through a direct connection between devices.
  • Wi-Fi Direct One of the direct connection technologies between devices using Wi-Fi is Wi-Fi Direct.
  • Wi-Fi Direct is a network connectivity standard that describes the operation of the link layer. There is no definition of a protocol or standard for the application at the upper level, which makes the compatibility and operation inconsistent when the application is run after being connected between Wi-Fi Direct devices. Because of this problem, the Wi-Fi Alliance (WFA) is currently working on a standard technology that includes a higher-level application technology called Wi-Fi Direct Services (WFDS).
  • WFA Wi-Fi Alliance
  • Wi-Fi Direct corresponds to a trade name as a marketing term, and the technical specification for this is collectively referred to as Wi-Fi P2P (Peer to Peer). Accordingly, in the present invention dealing with Wi-Fi based P2P technology, Wi-Fi Direct or Wi-Fi P2P may be used without distinction.
  • Wi-Fi P2P Peer to Peer
  • the method of data communication through direct connection between devices has been used by some users because it has been installed in devices such as mobile phones and notebook PCs equipped with wireless communication technologies such as Bluetooth, but the transmission speed is slow and the actual use has a long transmission distance. It is limited to within 10m.
  • the haptic performance when used in an environment where a large amount of data transmission or a large number of Bluetooth devices exist.
  • Wi-Fi P2P has been added to support direct communication between devices while retaining most of the features of the existing Wi-Fi standard. Therefore, there is an advantage in that the device equipped with the Wi-Fi chip can fully utilize hardware and physical characteristics, and provide P2P communication between devices mainly by upgrading software functions.
  • Wi-Fi chips As is widely known, devices equipped with Wi-Fi chips are expanding to a wide variety of ranges, such as note PCs, smartphones, smart TVs, game consoles, cameras, etc., and a sufficient number of suppliers and technical development personnel are formed.
  • software development that supports the Wi-Fi P2P specification has not yet been activated, because even if the Wi-Fi P2P specification is released, related software that can easily utilize the specification cannot be distributed.
  • P2P group there is a device that plays the role of an AP in an existing infrastructure network.
  • the device In the P2P standard, the device is called a P2P group owner (GO).
  • P2P group owner GO
  • P2P clients may exist around P2P GO. Only one GO can exist in one P2P group, and all other devices become client devices.
  • NFC Near Field Communication
  • the present disclosure relates to a method of performing service discovery using NFC in a wireless communication system.
  • the present specification relates to a method for performing service discovery through NFC based on an application service platform (ASP) in a wireless communication system.
  • ASP application service platform
  • the present specification relates to a method for providing information exchanged when performing service discovery using NFC in a wireless communication system.
  • the present disclosure relates to a method of exchanging information on a connection capability via NFC to perform a service connection in a wireless communication system.
  • a method for performing a service discovery by a terminal in a wireless communication system can be provided.
  • the first terminal transmits the handover request message to the second terminal using the Near Field Communication (NFC), the first terminal using the NFC, the second handover selection message to the second terminal It may include receiving from the terminal.
  • the handover request message and the handover selection message may include connection capability exchange (CCEX) information.
  • a first terminal for performing service discovery in a wireless communication system may be provided.
  • the first terminal may include a receiving module for receiving information from an external device, a transmitting module for transmitting information to the external device, and a processor for controlling the receiving module and the transmitting module.
  • the processor may transmit a handover request message to the second terminal using Near Field Communication (NFC) and receive a handover selection message from the second terminal using NFC.
  • NFC Near Field Communication
  • the handover request message and the handover selection message may include connection capability exchange (CCEX) information.
  • CCEX connection capability exchange
  • the CCEX information may include a first bit indicating whether a P2P connection is supported and a second bit indicating whether an infrastructure connection is supported. have.
  • the handover request message and the handover selection message may include a Wi-Fi P2P Carrier configuration record. ) May be further included.
  • the Wi-Fi P2P carrier setting record may include attribute information on a P2P connection.
  • the handover request message and the handover selection message may include a Wi-Fi infrastructure carrier configuration record (Wi-Fi Infrastructure Carrier). configuration record) may be further included.
  • Wi-Fi Infrastructure Carrier Wi-Fi Infrastructure Carrier
  • the Wi-Fi infrastructure carrier configuration record may include attribute information on an infrastructure connection.
  • CCEX information may be included in a verb record in a handover request message and a handover selection message.
  • flag information may be further included in the handover request message and the handover selection message.
  • the flag information may include a seek bit and a provide bit.
  • the search bit may be a bit indicating whether a service is requested
  • the providing bit may be a bit indicating whether a service is provided.
  • the terminal when the search bit indicates that the service is requested and the provision bit indicates that the service is not provided, the terminal is a terminal that searches for the service identified by the service hash,
  • the message transmitted by the terminal may be a handover request message.
  • the terminal when the search bit does not indicate to request a service but the provision bit indicates to provide a service, the terminal is a terminal that advertises a service identified by the service hash,
  • the message transmitted by the terminal may be a handover selection message.
  • the handover selection message may include service hash and advertisement ID information.
  • the terminal searches for a service identified by the first service hash, and 2 The service identified by the service hash can be advertised.
  • the present disclosure may provide a method of performing service discovery using NFC in a wireless communication system.
  • the present disclosure may provide a method of performing service discovery through NFC based on an application service platform in a wireless communication system.
  • the present disclosure may provide a method for providing information exchanged when performing service discovery using NFC in a wireless communication system.
  • the present disclosure may provide a method of exchanging information on a connection capability through NFC to perform a service connection in a wireless communication system.
  • FIG. 1 illustrates a structure of an IEEE 802.11 system to which the present invention can be applied.
  • FIG. 2 is a block diagram illustrating exemplary operation of a communication system employing access devices and wireless user devices.
  • Wi-Fi Direct (WFD) network.
  • FIG. 4 illustrates a process of configuring a WFD network.
  • FIG. 6 is a diagram illustrating a situation in which one P2P device forms a P2P group and is connected to an AP by operating as an STA of a WLAN.
  • FIG. 7 is a diagram illustrating an aspect of a WFD network when P2P is applied.
  • Wi-Fi Direct Services (WFDS) device is a simplified block diagram of a Wi-Fi Direct Services (WFDS) device.
  • WFDS Wi-Fi Direct Services
  • FIG. 9 is a view illustrating a process of connecting a WFDS session by discovering devices and discovering services between WFDS devices in a conventional WFDS.
  • FIG. 10 is a diagram illustrating a service application platform (ASP) supporting a plurality of interfaces.
  • ASP service application platform
  • FIG. 11 is a block diagram of a service in which an NFC interface is added in addition to the Wi-Fi interface.
  • FIG. 12 is a diagram for a method of exchanging an NFC handover request and a handover selection message in a terminal supporting NFC.
  • FIG. 13 is a diagram illustrating a message format for an NFC handover message in a terminal supporting NFC.
  • FIG. 14 is a diagram illustrating a method of performing service discovery using NFC.
  • 16 is a diagram illustrating a method of performing service discovery for a plurality of services using NFC.
  • FIG. 17 illustrates a method of using a pre-connected Wi-Fi infrastructure interface.
  • FIG. 18 illustrates a method of performing a service connection by forming a P2P group after performing service discovery using NFC.
  • 19 is a flowchart illustrating a method of performing service discovery using NFC.
  • 20 is a block diagram of a terminal device according to one embodiment of the present specification.
  • each component or feature may be considered to be optional unless otherwise stated.
  • Each component or feature may be embodied in a form that is not combined with other components or features.
  • some components and / or features may be combined to form an embodiment of the present invention.
  • the order of the operations described in the embodiments of the present invention may be changed. Some components or features of one embodiment may be included in another embodiment or may be replaced with corresponding components or features of another embodiment.
  • Embodiments of the present invention may be supported by standard documents disclosed in at least one of the wireless access systems IEEE 802 system, 3GPP system, 3GPP LTE and LTE-A (LTE-Advanced) system and 3GPP2 system. That is, steps or parts which are not described to clearly reveal the technical spirit of the present invention among the embodiments of the present invention may be supported by the above documents. In addition, all terms disclosed in the present document can be described by the above standard document.
  • CDMA code division multiple access
  • FDMA frequency division multiple access
  • TDMA time division multiple access
  • OFDMA orthogonal frequency division multiple access
  • SC-FDMA single carrier frequency division multiple access
  • CDMA may be implemented with a radio technology such as Universal Terrestrial Radio Access (UTRA) or CDMA2000.
  • TDMA may be implemented with wireless technologies such as Global System for Mobile communications (GSM) / General Packet Radio Service (GPRS) / Enhanced Data Rates for GSM Evolution (EDGE).
  • GSM Global System for Mobile communications
  • GPRS General Packet Radio Service
  • EDGE Enhanced Data Rates for GSM Evolution
  • OFDMA may be implemented in a wireless technology such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, Evolved UTRA (E-UTRA).
  • first and / or second may be used herein to describe various components, but the components should not be limited by the terms. The terms are only for the purpose of distinguishing one component from another component, for example, without departing from the scope of rights in accordance with the concepts herein, the first component may be called a second component, and similarly The second component may also be referred to as a first component.
  • unit refers to a unit that processes at least one function or operation, which may be implemented in a combination of hardware and / or software.
  • FIG. 1 is a diagram illustrating an exemplary structure of an IEEE 802.11 system to which the present invention can be applied.
  • the IEEE 802.11 architecture may consist of a plurality of components, and by their interaction, a WLAN may be provided that supports transparent STA mobility for higher layers.
  • the Basic Service Set (BSS) may correspond to a basic building block of an IEEE 802.11 LAN.
  • FIG. 1 illustrates the case where two BSSs (BSS1 and BSS2) exist and each BSS includes two STAs (STA1 and STA2 are included in BSS1 and STA3 and STA4 are included in BSS2).
  • the STA means a device that operates according to the Medium Access Control (MAC) / PHY (Physical) specification of IEEE 802.11.
  • the STA includes an access point (AP) STA (simply an AP) and a non-AP (non-AP) STA.
  • AP access point
  • AP access point
  • non-AP non-AP
  • the AP corresponds to a device that provides a network (eg, WLAN) connection to a non-AP STA through an air interface.
  • the AP may be configured in fixed or mobile form and includes a portable wireless device (eg, laptop computer, smart phone, etc.) that provides a hot spot.
  • AP is a base station (BS), Node-B, Evolved Node-B (eNB), Base Transceiver System (BTS), femto base station in other wireless communication fields (Femto BS) and the like.
  • Non-AP STAs generally correspond to devices that users directly handle, such as laptop computers, PDAs, wireless modems, and smartphones.
  • the non-AP STA may include a terminal, a wireless transmit / receive unit (WTRU), a user equipment (UE), a mobile station (MS), a mobile terminal, a mobile subscriber station. (Mobile Subscriber Station, MSS) and the like.
  • WTRU wireless transmit / receive unit
  • UE user equipment
  • MS mobile station
  • MS mobile terminal
  • MSS mobile subscriber Station
  • an ellipse representing a BSS may be understood to represent a coverage area where STAs included in the BSS maintain communication. This area may be referred to as a basic service area (BSA).
  • BSA basic service area
  • the most basic type of BSS in an IEEE 802.11 LAN is an independent BSS (IBS).
  • the IBSS may have a minimal form consisting of only two STAs.
  • the BSS (BSS1 or BSS2) of FIG. 1, which is the simplest form and other components are omitted, may correspond to a representative example of the IBSS. This configuration is possible when STAs can communicate directly.
  • this type of LAN may not be configured in advance, but may be configured when a LAN is required, which may be referred to as an ad-hoc network.
  • the membership of the STA in the BSS may be dynamically changed by turning on or off the STA, entering or exiting the BSS region, or the like.
  • the STA may join the BSS using a synchronization process.
  • the STA may be associated with the BSS.
  • FIG. 2 illustrates a communication system 200 employing access devices (eg, AP STAs) 202A, 202B, and 202C and wireless user devices (eg, non-AP STAs).
  • access devices eg, AP STAs
  • 202A, 202B, and 202C access devices
  • wireless user devices eg, non-AP STAs
  • access devices 202A-C are connected to a switch 204 that provides a connection to a Wide Area Network (WAN) 206, such as the Internet.
  • WAN Wide Area Network
  • Each of the access devices 202A-C provides a wireless connection to wireless devices within a coverage area (not shown) of the access device via a time division multiplexed network.
  • access devices 202A-C jointly provide the entire WLAN coverage area of system 200.
  • the wireless device 208 may be within the coverage area of the access devices 202A and 202B at the location indicated by the box marked with a solid line.
  • the wireless device 208 can receive beacons from each of the access devices 202A and 202B, such as the solid arrows 21OA and 21OB.
  • wireless device 208 When the wireless device 208 roams from the solid line box to the dashed box, the wireless device 208 enters the coverage area of the access device 202C and exits the coverage area of the access device 202A. Thus, wireless device 208 may receive beacons from access devices 202B and 202C, such as dashed arrows 212A and 212B.
  • the wireless device 208 can determine which access device currently provides the best connection to the wireless device 208. . For example, the wireless device 208 may repeatedly scan the beacons of adjacent access devices and measure the signal strength (eg, power) associated with each of the beacons. Thus, the wireless device 208 can be coupled with an access device that provides an optimal network connection based on the maximum beacon signal strength. The wireless device 208 may use other criteria related to optimal connection. For example, an optimal connection may be associated with more desirable services (eg, content, data rate, etc.).
  • WFD Wi-Fi Display
  • a WFD network is a network that allows Device to Device (D2D) (or Peer to Peer, P2P) communication with each other without Wi-Fi devices joining home, office, and hotspot networks.
  • D2D Device to Device
  • P2P Peer to Peer
  • WFD based communication is referred to as WFD D2D communication (simply, D2D communication) or WFD P2P communication (simply, P2P communication).
  • WFD P2P performing apparatus is referred to as a WFD P2P apparatus, or simply a P2P apparatus.
  • the WFD network 300 may include at least one Wi-Fi device including a first WFD device 302 and a second WFD device 304.
  • WFD devices include devices that support Wi-Fi, such as display devices, printers, digital cameras, projectors, and smartphones.
  • the WFD device also includes a non-AP STA and an AP STA.
  • the first WFD device 302 is a smartphone and the second WFD device 304 is a display device. WFD devices in the WFD network may be directly connected to each other.
  • P2P communication refers to a case in which a signal transmission path between two WFD devices is set directly between corresponding WFD devices without passing through a third device (eg, an AP) or an existing network (eg, accessing a WLAN via an AP). can do.
  • the signal transmission path directly set between the two WFD devices may be limited to the data transmission path.
  • P2P communication may refer to a case where a plurality of non-STAs transmit data (eg, voice / video / text information) without passing through the AP.
  • Signal transmission paths for control information may be used for WFD devices (e.g., non-AP STA-to-non-AP STA, non-AP STA-to- Set directly between APs, or between two WFD devices (e.g., non-AP STA-to-non-AP STA) via an AP, or an AP and a corresponding WFD device (e.g., AP-to-non-AP STA) # 1, AP-to-non-AP STA # 2).
  • WFD devices e.g., non-AP STA-to-non-AP STA, non-AP STA-to- Set directly between APs, or between two WFD devices (e.g., non-AP STA-to-non-AP STA) via an AP, or an AP and a corresponding WFD device (e.g., AP-to-non-AP STA) # 1, AP-to-non-AP STA # 2).
  • WFD devices e
  • FIG. 4 illustrates a process of configuring a WFD network.
  • the WFD network configuration process can be roughly divided into two processes.
  • the first process is a neighbor discovery (ND) procedure (S402a)
  • the second process is a P2P link establishment and communication process (S404).
  • ND neighbor discovery
  • S404 P2P link establishment and communication process
  • a WFD device eg, 302 of FIG. 3 finds another neighboring WFD device (eg, 304 of FIG. 3) within its (wireless) coverage and associates with the WFD device, e.g.
  • information necessary for pre-association can be obtained.
  • pre-connection may mean a second layer pre-connection in a wireless protocol.
  • the information required for pre-connection may include, for example, identification information for the neighboring WFD device.
  • the neighbor discovery process may be performed for each available wireless channel (S402b). Thereafter, the WFD device 302 may perform a process for establishing / communicating a WFD P2P link with another WFD device 304. For example, after the WFD device 302 is connected to the peripheral WFD device 304, the WFD device 304 may determine whether the WFD device 304 is a WFD device that does not satisfy the service requirement of the user. To this end, the WFD device 302 may discover the corresponding WFD device 304 after the second layer pre-connection with the peripheral WFD device 304.
  • the WFD device 302 disconnects the second layer connection established for the WFD device 304 and establishes a second layer connection with another WFD device. Can be set.
  • the two WFD devices 302 and 304 may transmit and receive signals through the P2P link.
  • a client having a P2P GO and a P2P function may be directly connected or may be connected to a legacy client having no P2P GO and a P2P function.
  • FIG. 6 is a diagram illustrating a situation in which one P2P device forms a P2P group and is connected to an AP by operating as an STA of a WLAN.
  • the P2P technical standard defines a situation in which a P2P device operates in this mode as a concurrent operation.
  • a Group Owner Intent value of a P2P attribute ID This value can range from 0 to 15.
  • P2P devices exchange this value with each other so that the device with the highest value becomes P2P GO.
  • Legacy devices that do not support Wi-Fi P2P technology may be subordinate to the P2P group, but the functions of the existing devices are limited to the function of infrastructure network access through P2P GO. do.
  • P2P devices transmit beacon signals by using Orthogonal Frequency Division Multiplexing (OFDM), so 11a / g / n is used as a Wi-Fi P2P device. Can be.
  • OFDM Orthogonal Frequency Division Multiplexing
  • the P2P specification includes four functions as follows to perform the operation in which the P2P GO and P2P clients are connected.
  • P2P discovery covers technology items such as device discovery, service discovery, group formation, and P2P invitation.
  • Device discovery allows two P2P devices to exchange device related information such as mutual device name or device type through the same channel.
  • Service discovery exchanges information related to the service to be used through P2P.
  • Grouping is the ability to determine which device will be a P2P GO to form a new group.
  • P2P invitation is a function of calling a permanently formed P2P group or joining a P2P device to an existing P2P group.
  • P2P Group Operation describes the formation and termination of P2P groups, connections to P2P groups, communication within P2P groups, services for P2P client discovery, and the operation of persistent P2P groups. .
  • P2P power management deals with the P2P device power management method and the signal processing method at the time of the power saving mode.
  • Managed P2P Device deals with forming P2P group from one P2P device and simultaneously accessing infrastructure network through WLAN AP.
  • the characteristics of the P2P group will be described.
  • the P2P group is similar to the existing infrastructure basic service set (BSS) in that P2P GO serves as an AP and a P2P client plays a STA. Therefore, P2P devices must be equipped with software that can act as a GO and a client. P2P devices are distinguished by using P2P device addresses, such as MAC addresses. However, when a P2P device communicates within a P2P group, it uses a P2P interface address to communicate with it. It is not necessary to use a globally unique ID address.
  • the P2P group has a single identifier P2P group ID, which consists of a combination of SSID (Service Set Identifier) and P2P device address of P2P GO.
  • Wi-Fi P2P specification uses WPA2-PSK / AES for security.
  • the life cycle of a P2P group is a one-time (temporary) connection method and a persistent connection method that attempts the same connection again after a certain time. In the case of Persistent group, once the P2P group is formed, each other's role, credentials, SSID, and P2P group ID are cached, and it is possible to quickly connect groups by applying the same connection type when reconnecting. .
  • Wi-Fi devices have a two-phase connection process. First, two P2P devices find each other, and second, a group formation step of determining a role of P2P GO or P2P client between the devices found.
  • the discovery step is to connect the P2P devices to each other, which is composed of a detailed search and listen state.
  • the search state conducts active searches using a probe request frame, which uses social channels of channels 1, 6, and 11 to limit the scope of the search for quick search. To search.
  • a P2P device in a listen state selects only one of three social channels and remains in a reception state. If another P2P device receives a probe request frame transmitted in a discovery state, a probe response frame is received.
  • the P2P devices may repeatedly search and listen, respectively, and reach each other's common channels.
  • the P2P device uses a probe request frame and a probe response frame to find a device type, a manufacturer, or a friendly device name to selectively associate with each other after discovering the other party.
  • service discovery may be used to identify compatible services between devices existing in the P2P device, in order to determine whether a service provided in each device is compatible with other devices.
  • the P2P specification does not specify a specific service discovery standard. P2P device users can search for nearby P2P devices and services and then quickly connect to the device or service they want.
  • the second step will be described as a group formation step.
  • the P2P devices complete the find step described above, the existence of the counterpart devices is completed.
  • two P2P devices should enter the GO negotiation phase to construct a BSS.
  • This negotiation phase is largely divided into two sub-phases. The first is GO negotiation and the second is Wi-Fi Protected Setup.
  • each device negotiates its role as a P2P GO or P2P client and establishes an operating channel for use within the P2P group.
  • the WPS phase conventional operations are performed in the existing WPS, such as exchanging PIN information input by a user of a device through a keypad, and a simple setup through a push button.
  • the role of P2P GO within the P2P Group is at the heart of the P2P Group.
  • the P2P GO assigns a P2P interface address, selects the operating channel of the group and sends out a beacon signal containing the various operating parameters of the group. Only P2P GO can transmit beacon signal in P2P group, so P2P device can quickly identify P2P GO and join group in the scan phase.
  • P2P GO may start a P2P group session on its own, or start a session after using the method described in the P2P discovery phase.
  • the value to be a P2P GO that plays such an important role is not a fixed value in any device but can be adjusted by an application or a higher layer service. Therefore, a developer wants to be a P2P GO according to the purpose of each application. You can select the appropriate value.
  • the P2P device allocates and uses the P2P interface address using the MAC address within the P2P group session.
  • the P2P interface address of the P2P GO is a BSSID (BSS Identifier), which is substantially the MAC address of the P2P GO.
  • the disconnection of the P2P group will be described. If the P2P session is terminated, the P2P GO should inform all P2P clients of the end of the P2P group session through de-authentication. On the P2P client side, you can also disconnect from the P2P GO, which should be disassociated if possible. The P2P GO that receives the client's disconnect request can determine that the P2P client has disconnected. If P2P GO detects an abnormal protocol error from a P2P client or a P2P client that interferes with the P2P group connection, it causes rejection of authentication or denial of association. Record in response and send.
  • FIG. 7 is a diagram illustrating an aspect of a WFD network when P2P is applied.
  • FIG. 7 illustrates an aspect of the WFD network when a new P2P application (eg, social chat, location-based service provision, game linkage, etc.) is applied.
  • a new P2P application eg, social chat, location-based service provision, game linkage, etc.
  • a plurality of P2P devices 702a to 702d perform P2P communication 710 in a WFD network, and P2P device (s) constituting the WFD network are changed at any time by the movement of the P2P device.
  • the WFD network itself can be newly created or destroyed in dynamic / short time.
  • a feature of the new P2P application portion is that in a dense network environment, P2P communication can be made and terminated dynamically and in a short time between a large number of P2P devices.
  • Wi-Fi Direct Services (WFDS) device shows a simplified block diagram of a Wi-Fi Direct Services (WFDS) device.
  • WFDS Wi-Fi Direct Services
  • Wi-Fi Direct MAC layer and higher define a platform for application service called ASP (Application Service Platform).
  • ASPs play a role in session management, command processing of services, and control and security between ASPs between upper applications and lower Wi-Fi Direct.
  • WFDS Send, Play, Display, Print, and the corresponding application and user interface (UI).
  • the send service refers to a service and an application capable of performing file transfer between two WFDS devices.
  • Play service refers to a streaming service and application for sharing A / V, photo, and music based on DLNA between two WFDS devices.
  • Print services define services and applications that enable printing of documents and photos between a device and a printer device having content such as documents and photos.
  • Display services define services and applications that enable screen sharing between WFA's Miracast Source and Miracast Sink. And enable service is defined to use ASP common platform when supporting third party application besides basic service.
  • the service hash is formed from the service name by using the first six octets of the service hash algorithm (eg, SHA256) hashing of the service name.
  • the service hash used in the present invention does not mean only a specific one, but is preferably understood as a sufficient representation of the service name using a probe request / response discovery mechanism. For example, if the service name is "org.wifi.example", the first 6 bytes of the hashed value of this service name as SHA256 is the hash value.
  • the WFDS includes a hash value in the probe request message and, if a service matches, checks whether the service is supported by responding with a probe response message including a service name. That is, the service name is a name of a user readable service in the form of DNS.
  • the service hash value means the upper six bytes of the 256-byte value generated by this service name algorithm (eg SHA256). As in the previous example, if the service name is "org.wifi.example", the service hash may be a value of "4e-ce-7e-64-39-49".
  • a part of the value hashed through the algorithm is expressed as a service hash (information), and may be included in the message as one piece of information.
  • FIG. 9 is a view illustrating a process of connecting a WFDS session by discovering devices and discovering services between WFDS devices in a conventional WFDS.
  • device A serves as an advertiser to advertise a WFDS that can be provided to a seeker
  • device B serves an advertised service. Assume that it serves to seek.
  • Device A is a device that advertises its own service and the other party seeks to start the service, and device B performs a process of searching for a device supporting the service by a higher application or a user's request.
  • the service stage of the device A advertises the WFDS that it can provide to the application service platform (ASP) stage of the device A.
  • the service unit of the B device may also advertise the WFDS that it can provide to the ASP of the B device.
  • the device B instructs the service terminal from the application terminal of the device B to use the WFDS as a searcher, and the service terminal instructs the ASP terminal to find the target device to use the WFDS.
  • the ASP terminal of the B device transmits a peer-to-peer probe request message to find its WFDS target device (S910).
  • the service name of the service that the user wants to find or supports can be hashed and put in the form of a service hash.
  • the device A transmits a P2P probe response message to the device B in response to the corresponding service (S920).
  • the P2P probe response message includes the service supported by the service name or the hash value and the corresponding advertisement ID value.
  • This process is a device discovery process in which A device and B device can know whether they are WFDS devices and support services.
  • the P2P service discovery process may optionally indicate the details of a specific service.
  • the device B which finds a device capable of WFDS with itself, transmits a P2P service discovery request message to the corresponding device (S930).
  • the device A matches the service advertised at the service terminal of the device A with the P2P service name and the P2P service information received from the device B at the ASP.
  • the P2P service discovery response message is transmitted to the device (S940). This will use the GAS protocol defined in IEEE 802.11u.
  • the device B can inform the application and the user of the search result. Until this point, the Wi-Fi Direct group is not formed, and when a user selects a service and the service performs a connect session, P2P group formation is performed.
  • the ASP may be operated based on at least one of Wi-Fi, Wi-Fi Direct, Neighbor Awareness Networking (NAN), Near Field Communication (NFC), and Bluetooth Low Energy (BLE).
  • Wi-Fi may be one interface. That is, the interface may refer to a method for supporting the operation of the terminal. In this case, a specific method for interworking with the device / service discovery by the ASP will be described based on the above-described interfaces.
  • the BLE of the above-described interface uses a frequency of 2.4 GHz and may be a Bluetooth transmission / reception scheme in a form of reducing power consumption. That is, it can be used to transmit data while reducing power consumption in order to transmit and receive extremely small amount of data quickly. This will be described later.
  • a NAN (Neighbor Awareness Networking) network includes a NAN terminal using the same set of NAN parameters (for example, a time interval between successive discovery windows, a duration of a discovery window, a beacon interval, or a NAN channel, etc.). Can mean.
  • the NAN terminals may configure a NAN cluster, where the NAN cluster may use the same set of NAN parameters and may mean a set of NAN terminals synchronized to the same discovery window schedule.
  • a NAN terminal belonging to a NAN cluster may directly transmit a multicast / unicast NAN service discovery frame to another NAN terminal within a range of a discovery window.
  • NFC may operate in a relatively low frequency band of 13.56 MHz.
  • an NFC channel may be selectively used.
  • the searching P2P device may discover the P2P device using the NFC channel.
  • NFC device discovery may mean that two P2P devices agree on a common channel for group formation and share provisioning information, such as a device's password.
  • FIG. 10 is a diagram illustrating an application service platform (ASP) supporting a plurality of interfaces.
  • ASP application service platform
  • the service terminal of the advertiser terminal advertises a service that it can provide, and as another terminal, the service terminal of the searcher terminal instructs the ASP terminal to find a target device to use the service.
  • the service terminal of the searcher terminal instructs the ASP terminal to find a target device to use the service.
  • the service terminal of the searcher terminal instructs the ASP terminal to find a target device to use the service.
  • the service terminal of the searcher terminal instructs the ASP terminal to find a target device to use the service.
  • the ASP may support a plurality of interfaces.
  • the ASP may support a plurality of interfaces for performing service discovery.
  • the ASP may support a plurality of interfaces for performing a service connection.
  • the plurality of interfaces for performing service discovery may be at least one of Wi-Fi Direct, Neighbor Awareness Networking (NAN), Near Field Communication (NFC), Bluetooth Low Energy (BLE), and WLAN Infrastructure.
  • NAN Neighbor Awareness Networking
  • NFC Near Field Communication
  • BLE Bluetooth Low Energy
  • WLAN Infrastructure Wireless Local Area Network
  • the plurality of interfaces for performing service connection may be at least one of Wi-Pi Direct and Infrastructure.
  • the ASP may support a plurality of frequency bands.
  • the plurality of frequency bands may be 2.4 GHz, 5 GHz, 60 GHz, or the like.
  • information about a frequency band of less than 1 GHz may be supported. That is, the ASP may support a plurality of frequency bands and is not limited to a specific frequency band.
  • a first terminal may perform device discovery or service discovery for a first service using an ASP. Thereafter, when the search for the device discovery or the service discovery is completed, the service connection may be performed based on the search result.
  • the interface used for the service discovery search and the interface performed for the service connection may be different from each other, and may be selected from a plurality of interfaces.
  • information or parameters for supporting the plurality of interfaces described above in the ASP may be used.
  • the service terminal of the terminal may obtain information on a service discovery method and a connection method capable of supporting the first service from the ASP.
  • the first service may be one service provided by the terminal and is not limited to a specific service.
  • the service terminal of the terminal may call the AdvertiseService () or SeekService () method to the ASP based on the information obtained from the ASP. That is, the terminal may use the ASP as an advertiser or a searcher to perform service discovery for the first service, which may be the same as the existing ASP operation.
  • the terminal may perform a service connection based on the service discovery result.
  • the service connection may be a P2P or WLAN infrastructure. In this case, for example, since both service connections support a plurality of frequency bands, the connection may be performed based on a preferred band.
  • the information about the service discovery method and the connection method may be as shown in Table 1 below.
  • FIG. 11 is a block diagram of a service in which an NFC interface is added in addition to the Wi-Fi interface.
  • the existing Wi-Fi interface could use a 2.4 GHz band in 802.11n and a 5 GHz band in 802.11ac.
  • the NFC may operate in a relatively low frequency band of 13.56MHz.
  • Services such as Wi-Fi Direct (WFD), infrastructure mode, Tunneled Direct Link Setup (TDLS), and NAN (Neighbor Area Network) are available on the Wi-Fi interface.
  • WFD Wi-Fi Direct
  • TDLS Tunneled Direct Link Setup
  • NAN Neighbor Area Network
  • an NFC out-of-band channel may be selectively used in a device discovery step.
  • the searching P2P device may discover the P2P device using the NFC OOB channel.
  • NFC OOB device discovery may mean that two P2P devices agree on a common channel for group formation and share provisioning information, such as a device's password.
  • the P2P device or the P2P group owner may use an NFC handover request / selection message for OOB device discovery.
  • the NFC handover request / selection message may be exchanged over the OOB channel prior to group formation or P2P invitation.
  • FIG. 12 is a diagram for a method of exchanging an NFC handover request and a handover selection message in a terminal supporting NFC.
  • two terminals supporting NFC may negotiate at least one alternative carrier for data exchange.
  • a terminal requesting handover (hereinafter, a handover request terminal) may transmit a handover request message to a terminal (hereinafter, handover selector) which selects whether to handover.
  • the handover request message may include information on at least one alternative carrier.
  • alternative carriers may be set for each interface. That is, different alternative carriers may mean different interfaces.
  • FIG. 12 may include alternative carrier information for Bluetooth and alternative carrier information for Wi-Fi.
  • the handover selection terminal may receive a handover request message.
  • the handover selection terminal may select an alternative carrier based on the handover request message.
  • the handover selection terminal may perform the selection based on whether it is an alternative carrier that it can support.
  • the handover selection terminal may transmit a handover selection message to the handover request terminal.
  • the handover requesting terminal and the handover selecting terminal may perform data exchange using the selected alternative carrier.
  • FIG. 12A may be an example of selecting one alternative carrier among a plurality of alternative carriers.
  • the handover request terminal and the handover selection terminal may perform data exchange based on one selected alternative carrier.
  • Figure 12 (b) is a case where the handover selection terminal supports a plurality of alternative carriers may include information on the plurality of alternative carriers in the handover selection message.
  • the handover request terminal may exchange data using a preferred alternative carrier among a plurality of alternative terminals.
  • the handover request terminal may perform data exchange using another alternative carrier, which is not limited to the above-described embodiment.
  • the handover requesting terminal and the handover selecting terminal may exchange data for handover using an alternative carrier supported.
  • the alternative carrier described above may be at least one of Wi-Fi Direct, NAN, NFC, BLE, and WLAN infrastructure as an interface, and is not limited to the above-described embodiment.
  • FIG. 13 is a diagram illustrating a message format for an NFC handover message in a terminal supporting NFC.
  • the handover message may include a record field for the handover and an NFC Data Exchange Frame (NDEF) record field.
  • NDEF NFC Data Exchange Frame
  • the NDEF record field may not be included depending on the need, or may include a plurality.
  • the NDEF record may be a carrier configurator record, which will be described later.
  • the record field for the handover may include a handover request record, a handover select record, a handover mediate record, and a handover initiate record.
  • a handover request record a handover request record
  • a handover select record a handover mediate record
  • a handover initiate record a handover initiate record.
  • the record field for the handover may include at least one or more of a header field, a version field, and an alternative carrier field.
  • the alternative carrier field may include zero or more fields. That is, alternative carrier fields may not be included or a plurality may be included depending on supported alternative carriers.
  • the alternative carrier field may include at least one of a header field, a carrier power state field, a carrier data reference field, and an auxiliary data reference field.
  • the carrier data reference field may include zero or more fields. That is, the carrier data reference field may not be included or may be included in plural as necessary.
  • the auxiliary data reference field may include zero or more fields. That is, the auxiliary data reference field may also be included or plural as necessary.
  • the carrier data reference field and the auxiliary data reference field may indicate an NDEF record field as a pointer.
  • the NDEF record indicated by the carrier data reference field may be either a handover carrier record or a carrier configuration record.
  • the NDEF record indicated by the carrier data reference field may be an IP network record or a verb record, and is not limited to the above-described embodiment. That is, the carrier data reference field may indicate an NDEF record including information about a carrier.
  • the auxiliary data reference may also be a pointer indicating an NDEF record including information about the auxiliary data.
  • the NDEF record indicated by the auxiliary data reference field may be any one of an auxiliary data record or a verb record.
  • the NDEF record indicated by the auxiliary data reference field may be any one of a network identifier or a device information. That is, the auxiliary data reference may indicate an NDEF record including auxiliary information about a carrier.
  • verb record information may be configured with respective fields, as shown in FIG. 13, to include respective information.
  • the network identifier may also be configured with respective fields to include respective information.
  • the terminal that supports NFC may exchange a handover message based on NFC, and may perform the above-described service discovery.
  • FIG. 14 is a diagram illustrating a method of performing service discovery using NFC.
  • a seeker device (or a handover request terminal) 1420 may provide a SeekService () method to an ASP to perform service discovery through NFC.
  • the SeekService () method may include at least one service hash.
  • the SeekService () method may further include at least one or more of connection capability exchange information (CCEX) and carrier configuration record information.
  • CCEX connection capability exchange information
  • the ASP of the searcher terminal 1420 may set an NFC tag (NFC config) and transmit a handover request message to an advertiser device (Advertise Device or handover selection terminal) 1410 based on the NFC touch. have.
  • the handover request message may be transmitted for each request of the searcher terminal 1420. That is, it can be performed independently for each request or service.
  • the handover request message may include at least one of service hash, CCEX information, and carrier configuration record information as information included in the SeekService () method.
  • the advertiser terminal 1410 may check whether there is a match for a service supported through service hash matching. Thereafter, the advertiser terminal 1410 may transmit a handover selection message to the searcher terminal 1420.
  • the advertiser terminal 1410 may call the AdvertiseService () method, and the AdvertiseService () method may include at least one of a service hash, an advertiser ID, an advertisement ID, CCEX information, and carrier setting record information. This may be included.
  • the handover selection message may include at least one of service hash, advertiser ID (Advertisement ID), CCEX information, and carrier setting record information as information included in the above-described AdvertiseService () method.
  • the searcher terminal 1420 may report a search result to a higher layer as a SearchResult () event.
  • the searcher terminal 1420 may perform the ASP session connection by calling the ConnectSession () method and performing Wi-Fi connection establishment.
  • the message format as shown in FIG. 15 may be used.
  • the handover record field may be a handover request record.
  • the handover request record may include an alternative carrier record as described above.
  • the alternative carrier record may include a carrier data reference field.
  • the carrier data reference field may be a first value and / or a second value, which will be described later.
  • the first NDEF record of the handover request message may be a verb NDEF record as an auxiliary data record.
  • the verb NDEF record may include at least one of an NDEF record header, a context ID, a flag, an external record ID, a service hash, and CCEX information.
  • a Wi-Fi P2P Carrier configuration record and / or a Wi-Fi Infrastructure Carrier configuration record may be set. This will also be described later.
  • the handover record field may be a handover select record.
  • the handover request record may include an alternative carrier record as described above.
  • the alternative carrier record may include a carrier data reference field.
  • the carrier data reference field may be a first value and / or a second value, which will be described later.
  • the first NDEF record of the handover selection message may be a verb NDEF record as an auxiliary data record.
  • the verb NDEF record may include at least one of an NDEF record header, a context ID, a flag, an external record ID, a service hash, an advertisement ID, and CCEX information. It may include one.
  • a Wi-Fi P2P Carrier configuration record and / or a Wi-Fi Infrastructure Carrier configuration record may be set. This will also be described later.
  • the verb NDEF record included in the above handover request message and the handover selection message may be defined as shown in Table 2 below.
  • the Context Identifier field may be used as identification information about a domain or a configuration.
  • the flag field may consist of four subfields, and may indicate information on a service in consideration of service discovery performed through NFC.
  • the flag field may include a seek bit and a provide bit.
  • the search bit may be set to a first value ('1' in the following table) if the service bit is provided as a 1 bit (when the service is requested).
  • the providing bit may be set to a first value ('1' in the following table) when providing a service as one bit. More specifically, the search bit and the provide bit may be as shown in Table 3 below.
  • the search information may include only information about the service hash. That is, the terminal may perform a search for the service specified by the service hash as the searcher terminal 1510 or the handover requester terminal. That is, when searching for a service as the searcher terminal 1510, the search bit and the provide bit of the flag field may be set to a first value and a second value, respectively. Also, as an example, if the search bit is the second value and the provision bit is the first value, the search information may include service hash and advertisement ID information. That is, the terminal may include a service hash for a specific service as an advertiser terminal 1520 or a handover selector terminal.
  • advertiser ID information which is a value temporarily used for service advertisement, may be included. That is, when the advertiser terminal 1520 performs the advertisement for the service, the search bit and the provide bit of the flag field may be set to the second value and the first value, respectively.
  • both the search bit and the provide bit may be set to a first value.
  • the terminal may serve as a searcher terminal and an advertiser terminal.
  • the terminal may search for the first service as a searcher terminal through a service hash corresponding to the first service.
  • the terminal may perform the advertisement for the second service through the service hash corresponding to the second service as the advertiser terminal for the second service, for this purpose, the service hash and the advertiser ID information corresponding to the second service. Can be provided.
  • whether or not the terminal plays a role as a searcher terminal and / or as an advertiser terminal based on each service may be indicated through a search bit and a provision bit of a flag field, and are not limited to the above-described embodiment. Do not.
  • the verb NDEF record of the handover request message and the handover selection message may include an external record ID length field, an external record ID field, and a service hash field.
  • the verb NDEF record of the handover selection message may include the following advertisement ID field, and the verb NDEF record of the handover request message may not include the following advertisement ID field.
  • the verb NDEF record of the handover message may include CCEX information.
  • the CCEX information may be information indicating an interface for performing a service connection.
  • the service connection may be performed through a P2P connection or Wi-Fi direct connection or an infrastructure connection.
  • P2P connection is supported and a Wi-Fi P2P carrier setting record exists. Can be instructed.
  • the P2P connection is not supported and the Wi-Fi P2P carrier setting record does not exist. May be indicated.
  • the infrastructure connection is supported and the Wi-Fi infrastructure carrier configuration record May be indicated to exist.
  • the second bit of CCEX information ('Bit 0' in the table below) is the second value ('2' in the table below)
  • the infrastructure connection is not supported and a Wi-Fi infrastructure carrier setup record exists. It may be indicated as not to be limited, but is not limited to the following examples.
  • the handover request record of the handover request message may be located in the first record of the NDEF message. That is, it is necessary to provide the handover type and the necessary information first, and may be located in the first record.
  • the ID of the alternative carrier record of the handover request record may be 'A' as the first value.
  • the carrier data reference of the handover request record may be set to a first value and / or a second value.
  • the first value may be an ID of a Wi-Fi P2P carrier setting record.
  • the second value may be an ID of a Wi-Fi infrastructure carrier configuration record. That is, the carrier data reference may include a value corresponding to a supported interface during P2P connection and / or infrastructure connection. For example, only one of the two or both may be supported, and is not limited to the above-described embodiment.
  • the verb NDEF record message of the handover request message may be located in the second record following the handover request record.
  • the payload of the verb NDEF record may be set as shown in Table 1 and Table 2 above.
  • the CCEX information may be composed of one octet, and the first value (ex, 0x40) in which only the infrastructure connection is supported and the second value (ex, 0x80) and the infrastructure in which only the P2P connection is supported. It may be set to any one of the third values ex and 0Xc0 supporting both P2P connections, and are not limited to the above-described embodiment.
  • a Wi-Fi P2P carrier configuration record and a Wi-Fi infrastructure carrier configuration record may be included if necessary according to the supported interface based on the handover request message, and are not limited to the above-described embodiment. That is, if only Wi-Fi P2P carrier setup records are included, if only Wi-Fi infrastructure carrier setup records are included, if both Wi-Fi P2P carrier setup records and Wi-Fi infrastructure carrier setup records are included, and There may be a case where neither the Fi P2P carrier setup record and the Wi-Fi infrastructure carrier setup record are included, but are not limited to the above-described embodiment.
  • the handover selection message may also be similar to the handover request message.
  • the handover selection record of the handover selection message may be located at the first record of the NDEF message. That is, it is necessary to provide the handover type and the necessary information first, and may be located in the first record.
  • the ID of the alternative carrier record of the handover selection record may be 'A' as the first value.
  • the carrier data reference of the handover selection record may be set to a first value and / or a second value.
  • the first value may be an ID of a Wi-Fi P2P carrier setting record.
  • the second value may be an ID of a Wi-Fi infrastructure carrier configuration record. That is, the carrier data reference may include a value corresponding to a supported interface during P2P connection and / or infrastructure connection.
  • the verb NDEF record message of the handover selection message may be located in the second record following the handover selection record.
  • the payload of the verb NDEF record may be set as shown in Table 1 and Table 2 above.
  • the CCEX information may be composed of one octet, and the first value (ex, 0x40) in which only the infrastructure connection is supported and the second value (ex, 0x80) and the infrastructure in which only the P2P connection is supported. It may be set to any one of the third values ex and 0Xc0 supporting both P2P connections, and are not limited to the above-described embodiment.
  • a Wi-Fi P2P carrier configuration record and a Wi-Fi infrastructure carrier configuration record may be included if necessary according to the supported interface based on the handover selection message, and are not limited to the above-described embodiment. That is, if only Wi-Fi P2P carrier setup records are included, if only Wi-Fi infrastructure carrier setup records are included, if both Wi-Fi P2P carrier setup records and Wi-Fi infrastructure carrier setup records are included, and There may be a case where neither the Fi P2P carrier setup record and the Wi-Fi infrastructure carrier setup record are included, but are not limited to the above-described embodiment.
  • the verb NDEF record of the handover selection message may include an advertisement ID as a temporary ID, as described above.
  • the CCEX information included in the above-described handover request record may be included when the SeekService () method or the ASPSeekInstance () method is called in the searcher terminal (or the handover request terminal).
  • the CCEX information included in the handover selection record may be included when the AdvertiseSerivce () method is called in the advertiser terminal (or the handover selector terminal), and is not limited to the above-described embodiment.
  • the Wi-Fi P2P carrier setting record and / or the Wi-Fi infrastructure carrier setting record may further include information on a preferred connection as the connection capability information, and is not limited to the above-described embodiment.
  • the Wi-Fi infrastructure carrier setup record may be used to use an infrastructure connection for an already existing service session, and is not limited to the above-described embodiment.
  • CCEX Attribute CCEX Attribute
  • the infrastructure connection information may also be included in the above-described Wi-Fi infrastructure carrier setup record as an infrastructure connection information attribute, which may be as shown in Table 5 below. This will be described later.
  • 16 is a diagram illustrating a method of performing service discovery for a plurality of services using NFC.
  • the searcher terminal may transmit a handover request message to the advertiser terminal (or handover selector terminal), as described above.
  • the searcher terminal may transmit a handover request message including information on a plurality of services.
  • the searcher terminal may transmit a handover request message.
  • the handover request message may include information about a plurality of services.
  • the handover request record of the handover request message may include a plurality of alternative carrier records, as described above.
  • each alternative carrier record may indicate each NDEF record.
  • the carrier data reference field of each alternative carrier record in the handover request record may be set to a first value and / or a second value.
  • the first value may be an ID of a Wi-Fi P2P carrier setting record.
  • the second value may be an ID of a Wi-Fi infrastructure carrier setup record, as described above.
  • each verb NDEF record indicated by each alternative carrier record may be included in the handover request message.
  • each carrier establishment record corresponding to each alternative carrier record may be included in the handover request message. That is, a record for each service may be set in the handover request message, which is not limited to the above-described embodiment.
  • the connection capability information for each service may use the existing interface or perform service connection through the same interface for efficiency, and may not be limited to the above-described embodiment.
  • the advertiser terminal (or handover selector terminal 1620) receiving the handover request message checks the supported services through service hashes of a plurality of services included in the handover request message, and information about the same. May be transmitted to the searcher terminal 1610.
  • FIG. 17 illustrates a method of using a pre-connected Wi-Fi infrastructure interface.
  • the searcher terminal may transmit a handover request message and receive a handover selection message from the advertiser terminal.
  • a Wi-Fi infrastructure connection may already be established between the searcher terminal and the advertiser terminal.
  • the handover request message and the handover selection message may include information on the Wi-Fi infrastructure connection already connected.
  • the attribute information about the Wi-Fi infrastructure connection may be included in the Wi-Fi infrastructure carrier configuration record.
  • the attribute information on the Wi-Fi infrastructure connection may include information about the BSSID of the AP, the infrastructure address of the infrastructure, the IP address, and the like, but is not limited to the above-described embodiment. Do not.
  • FIG. 18 illustrates a method of performing a service connection by forming a P2P group after performing service discovery using NFC.
  • the advertiser terminal 1810 and the searcher terminal 1820 may perform a service search through a handover request message and a handover selection message, as described above.
  • the alternative carrier record may indicate that the Wi-Fi P2P carrier setting record is included.
  • the attribute information as the information on the Wi-Fi P2P interface included in the Wi-Fi P2P carrier setting record may be as shown in Table 6 below.
  • the Wi-Fi P2P carrier setting record includes a field for a P2P_Version attribute, a feature capability field, a connection capability information field, and an information field for a persistent P2P group. It may include at least any one of.
  • the P2P version field may be set to “0x02” or “0x00”. That is, the P2P version field may be set to a value indicating major version or minor version as information on the P2P version.
  • the minor version may be a version considering backward compatibility with the previous system.
  • an ASP supporting another interface as described above it may be set to a new P2P version value, and is not limited to the above-described embodiment.
  • the feature capability field may be a field including information necessary for exchanging information on the ASP transmission capability parameter.
  • the connection capability information field may include information related to the setting of Auto GO (Group Owner) or PersistentGO.
  • the persistent P2P group field may include information about the persistent P2P group. That is, the Wi-Fi P2P carrier setting record may include information about Wi-Fi P2P in which an ASP session is formed based on the P2P connection. More specifically, when two terminals want to start a new connection required in the service session, the Wi-Fi P2P carrier configuration record may be included in the handover request message.
  • a network identity record may be included when there is no connection or a P2P topology is unknown. That is, the network identification record may be a record including information on a network address for identifying a network interface connected as a specific carrier. In this case, for example, the network identifiers may use a corresponding search protocol to obtain a current network address corresponding to the identifiers. For example, the identification attribute may be included in the form of a TLV.
  • 19 is a flowchart illustrating a method for performing discovery by a terminal according to an embodiment of the present specification.
  • the first terminal may transmit a handover request message including CCEX information to the second terminal using NFC.
  • NFC NFC
  • the first terminal and the second terminal are ASPs. It may be a terminal for performing service discovery using any one of a plurality of interfaces based on.
  • the first terminal and the second terminal may be a terminal for performing a service connection using a Wi-Fi direct or infrastructure based on the ASP, as described above.
  • the first terminal and the second terminal may perform a search for a service using NFC. That is, the handover request message transmitted by the first terminal may be a searcher terminal and a message transmitted to perform a service search.
  • the handover request message may include CCEX information.
  • the CCEX information may include a first bit indicating whether P2P connection is supported.
  • the handover request message may include a Wi-Fi P2P carrier configuration record.
  • the Wi-Fi P2P carrier setting record may include attribute information on the P2P connection, as described above.
  • the CCEX information may include a second bit indicating whether the infrastructure connection is supported. In this case, when the second bit indicates that the infrastructure connection is supported, the handover request message may include a Wi-Fi infrastructure carrier configuration record. In this case, the Wi-Fi infrastructure carrier configuration record may include attribute information on the infrastructure connection, as described above.
  • the first terminal may receive a handover selection message transmitted by the second terminal (S1920).
  • the second terminal provides a service through the handover selection message.
  • the second terminal may perform an advertisement for the service through the handover selection message as the advertiser terminal.
  • the handover selection message may include CCEX information.
  • the CCEX information may include a first bit indicating whether the P2P connection is supported.
  • the handover request message may include a Wi-Fi P2P carrier configuration record.
  • the Wi-Fi P2P carrier setting record may include attribute information on the P2P connection, as described above.
  • the CCEX information may include a second bit indicating whether the infrastructure connection is supported.
  • the handover request message may include a Wi-Fi infrastructure carrier configuration record.
  • the Wi-Fi infrastructure carrier configuration record may include attribute information on the infrastructure connection, as described above.
  • the first terminal and the second terminal may establish a service connection establishment and an ASP session.
  • the first terminal and the second terminal may include a handover request message and The CCEX information included in the handover selection message may be used to exchange information on an interface for performing service connection and ASP session establishment.
  • the first terminal and the second terminal may perform the connection to the service through the P2P connection.
  • the first terminal and the second terminal may perform the connection to the service through the infrastructure connection.
  • the first terminal and the second terminal can select any one of the two interfaces to perform the service connection, which is described above As shown.
  • 20 is a block diagram of a terminal device according to one embodiment of the present specification.
  • the terminal device may be a terminal capable of performing service discovery.
  • the terminal device 100 includes a transmitting module 110 for transmitting a wireless signal, a receiving module 130 for receiving a wireless signal, and a processor 120 for controlling the transmitting module 110 and the receiving module 130. can do.
  • the terminal 100 may communicate with an external device by using the transmitting module 110 and the receiving module 130.
  • the external device may be another terminal device.
  • the external device may be a base station. That is, the external device may be a device capable of communicating with the terminal device 100 and is not limited to the above-described embodiment.
  • the terminal device 100 may transmit and receive digital data such as content using the transmission module 110 and the reception module 130.
  • the processor 120 of the terminal device 100 may transmit a handover request message to another terminal using NFC.
  • the processor 120 of the terminal device 100 may receive a handover selection message from another terminal using NFC.
  • the handover request message and the handover selection message may include CCEX information, as described above.
  • the CCEX information may include a first bit indicating whether P2P connection is supported.
  • the handover request message may include a Wi-Fi P2P carrier configuration record.
  • the Wi-Fi P2P carrier setting record may include attribute information on the P2P connection, as described above.
  • the CCEX information may include a second bit indicating whether the infrastructure connection is supported.
  • the handover request message may include a Wi-Fi infrastructure carrier configuration record.
  • the Wi-Fi infrastructure carrier configuration record may include attribute information on the infrastructure connection, as described above.
  • Embodiments of the present invention described above may be implemented through various means.
  • embodiments of the present invention may be implemented by hardware, firmware, software, or a combination thereof.
  • a method according to embodiments of the present invention may include one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), and Programmable Logic Devices (PLDs). It may be implemented by field programmable gate arrays (FPGAs), processors, controllers, microcontrollers, microprocessors, and the like.
  • ASICs Application Specific Integrated Circuits
  • DSPs Digital Signal Processors
  • DSPDs Digital Signal Processing Devices
  • PLDs Programmable Logic Devices
  • FPGAs field programmable gate arrays
  • processors controllers, microcontrollers, microprocessors, and the like.
  • the method according to the embodiments of the present invention may be implemented in the form of a module, a procedure, or a function that performs the functions or operations described above.
  • the software code may be stored in a memory unit and driven by a processor.
  • the memory unit may be located inside or outside the processor, and may exchange data with the processor by various known means.

Abstract

La présente invention concerne un procédé permettant à un terminal d'exécuter une découverte de service dans un système de communications sans fil. Le procédé de réalisation d'une découverte de service peut comprendre les étapes suivantes : un premier terminal transmet un message de demande de transfert à un second terminal à l'aide d'une communication en champ proche (NFC); et le premier terminal reçoit un message de sélection de transfert depuis le second terminal NFC. Un échange de capacités de connexion (CCEX) des informations peuvent être comprises dans le message de demande de transfert intercellulaire et le message de sélection de transfert.
PCT/KR2016/014626 2015-12-14 2016-12-14 Procédé et dispositif permettant d'exécuter une découverte de service via nfc dans un système de communications sans fil WO2017105071A1 (fr)

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
US201562267201P 2015-12-14 2015-12-14
US62/267,201 2015-12-14
US201562387444P 2015-12-24 2015-12-24
US201562387508P 2015-12-24 2015-12-24
US201562387489P 2015-12-24 2015-12-24
US62/387,489 2015-12-24
US62/387,444 2015-12-24
US62/387,508 2015-12-24

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CN112205013B (zh) * 2018-05-31 2022-12-27 皇家飞利浦有限公司 用于无线通信切换的设备

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