KR102045944B1 - Method and apparatus for wi-fi connecting using wi-fi protected setup in a portable terminal - Google Patents

Abstract

The present invention relates to a method of connecting a Wi-Fi using a Wi-Fi Protected Setup (WPS) in a mobile terminal, when the activation of the WPS is requested, entering a group owner mode of Wi-Fi Direct, and entering the group owner mode. Enters a WPS session mode that can operate in a WPS registrar mode and discovers whether there is an AP (Access Point) or group owner mode activated device in which a WPS session in a WPS registrar mode is activated And searching for an AP having a WPS registrar mode activated as a result of the discovery, deactivating the entered WPS registrar mode and group owner mode, and activating a WPS session for operating in a WPS Enrollee mode. And accessing the AP.

Description

METHOOD AND APPARATUS FOR WI-FI CONNECTING USING WI-FI PROTECTED SETUP IN A PORTABLE TERMINAL} 와이파이 PS (Ｗ 中 -Ｆｉ プ ｒｏｔｅｃｔｅ ＤＳｔｕｐ)

The present invention relates to wireless communication, and more particularly, to an invention that can be easily connected between devices providing Wi-Fi communication using Wi-Fi Protected Setup (WPS).

Conventional wireless communication through a Wi-Fi connection is a device that provides a Wi-Fi function since a device that provides a Wi-Fi function has been proposed to use a wireless communication through a connection to an access point (AP). There was a lack of consideration for direct communication between the two.

Given that traditional Wi-Fi does not seamlessly provide direct communication between devices, the Wi-Fi Alliance is called Wi-Fi Direct or Wi-Fi P2P. Suggested a function.

The Wi-Fi Direct provides compatibility with existing Wi-Fi, and provides a function (eg, Peer to Peer communication function) to directly connect and communicate with Wi-Fi devices without an AP.

On the other hand, since Wi-Fi Direct is a technology proposed with compatibility with the conventional Wi-Fi function, that is, legacy Wi-Fi function, legacy Wi-Fi devices are basically connected using WPS (Wi-Fi Protected Setup). Support the method.

The WPS connection method allows a device that attempts to connect to Wi-Fi to be easily provided with a wireless communication function using Wi-Fi by inputting a button using a PBC (Push Button Configuration) method or inputting PIN information using a PIN method. .

When the WPS session is activated, the device attempting to connect to Wi-Fi detects the existence of the AP through frequency and channel scanning, and then starts the WPS Registration Protocol with the AP that has been activated. Through this, the AP acquires the Credentials (SSID, Security Info, Network Key) and automatically accesses the AP using the obtained Credentials.

On the other hand, the WPS connection method described above has the advantage of being able to conveniently provide a wireless communication function using the Wi-Fi, if the WPS connection method is supported even when using the Wi-Fi Direct function as well as legacy Wi-Fi, convenience of using Wi-Fi Direct. Will be able to increase.

However, since Wi-Fi Direct can only be used by devices that conform to the specifications of IEEE 802.11g or higher (eg, IEEE 802.11g or IEEE 802.11n), devices that provide only legacy Wi-Fi functions (eg, IEEE 802.11b). Devices that comply only with the specifications of the device will not be able to use the Wi-Fi Direct function.

Since not all Wi-Fi devices support Wi-Fi Direct, if you want to provide a connection using the WPS button for Wi-Fi Direct, you will need to provide a WPS button for Wi-Fi connection and a WPS button for Wi-Fi Direct connection. There is a need.

However, if a separate WPS button is provided for using the legacy Wi-Fi function (for example, using wireless communication through an AP connection) and the Wi-Fi Direct function (for example, P2P communication between Wi-Fi devices), There is a problem that does not meet the original intention to use the Wi-Fi or Wi-Fi Direct function. Furthermore, it is convenient for the user to provide a kind of Wi-Fi integration function that allows the legacy Wi-Fi or Wi-Fi Direct to be selectively connected according to the characteristics of the device corresponding to the connection by selecting only one WPS button.

Therefore, while applying the WPS connection method applied to legacy Wi-Fi connection only to Wi-Fi Direct connection, only one WPS connection request menu (for example, WBC button of PBC connection method) is used. The present invention proposes to selectively allow automatic linkage. That is, the present invention proposes a WPS connection method capable of supporting both a Wi-Fi connection and a Wi-Fi direct connection by activating the WPS connection regardless of the Wi-Fi support specification of the Wi-Fi device and the property of the Wi-Fi device.

The present invention relates to a method of connecting a Wi-Fi using a Wi-Fi Protected Setup (WPS) in a mobile terminal, when the activation of the WPS is requested, entering a group owner mode of Wi-Fi Direct, and entering the group owner mode. Enters a WPS session mode that can operate in a WPS registrar mode and discovers whether there is an AP (Access Point) or group owner mode activated device in which a WPS session in a WPS registrar mode is activated And searching for an AP having a WPS registrar mode activated as a result of the discovery, deactivating the entered WPS registrar mode and group owner mode, and activating a WPS session for operating in a WPS Enrollee mode. And accessing the AP.

In addition, the present invention is a Wi-Fi connection device using a Wi-Fi Protected Setup (WPS) in a portable terminal, a Wi-Fi module for providing a short-range wireless communication function according to the IEEE 802.11 standard, and a key input unit for receiving a user's key input Alternatively, if it is determined that the activation of WPS is requested through the display unit and the key input unit or the display unit, the user enters the group owner mode of the Wi-Fi Direct and enters the WPS session mode capable of operating in the WPS registrar mode. If there is an access point (AP) in which a WPS session in WPS Registrar mode is activated or a device in which a group owner mode is activated is present, and if the AP in which the WPS registrar mode is activated is found, the entered WPS registrar mode and group are detected. By disabling owner mode and activating a WPS session to operate in WPS Enrollee mode. And a controller for controlling access to the discovered AP.

Even though Wi-Fi Direct is widely used, there are still devices that support legacy Wi-Fi function only (for example, smartphones). Devices that support Wi-Fi Direct feature support Wi-Fi Direct and Wi-Fi Direct through a WPS connection. When connecting to a device that does not support the direct function, there is an effect to improve the connection compatibility with the devices.

In addition, the present invention that enables the use of the Wi-Fi Direct function using the WPS connection method has the advantage that is fully compatible with the existing WPS connection method for legacy Wi-Fi.

In addition, the present invention provides a Wi-Fi Direct connection function by simply activating WPS. The present invention provides a conventional Wi-Fi Direct connection with a device corresponding to a connection target through device discovery, service discovery, and group creation. Compared to the Wi-Fi direct connection method, the connection time is shortened.

1 is a schematic flowchart of a process of creating a P2P group by executing a Wi-Fi P2P function;
2 is a block diagram of a mobile terminal according to an embodiment of the present invention.
3 is a flowchart illustrating a Wi-Fi connection process according to a WPS activation request according to an embodiment of the present invention.

In the Wi-Fi Direct function described in the embodiment of the present invention, devices (for example, P2P device 1 and P2P device 2) providing the Wi-Fi direct function may be provided by creating a Wi-Fi P2P group.

Before looking at the embodiment of the present invention that supports both the legacy Wi-Fi connection and the Wi-Fi Direct connection function through the WPS connection, the process of creating a Wi-Fi P2P group through the Wi-Fi Direct function is as follows. The creation (or formation) of a Wi-Fi P2P group is largely performed through three processes of device discovery, service discovery, and group creation.

Device Discovery

The device discovery process is a feature of Wi-Fi Direct that allows Wi-Fi devices (e.g., P2P devices 1 and 2) to recognize each other and create a connection to create a Wi-Fi P2P group. This is necessary procedure.

A Wi-Fi P2P device (for example, the P2P device shown in FIG. 1) that enters a menu to use the Wi-Fi Direct function (or Wi-Fi P2P function) or enters a device discovery mode by executing a predetermined application. 1 or 2, the P2P device 2 searches for nearby Wi-Fi devices by repeating a channel scan, listen, and search of IEEE 802.11 at predetermined time periods.

The basic operation of the device discovery procedure performed in the creation of the Wi-Fi P2P group is performed by exchanging Probe Request and Probe Response messages of the IEEE 802.11 MAC protocol. Probe Request includes information such as P2P IE, WSC IE and Supp Reg IE, and Probe Response includes P2P IE, WSC IE, RSN IE and Supp Reg IE.

Service Discovery

The service discovery may be performed between the above discovery process and the group creation process to be described later, and may be selectively performed. The service discovery process is a function of exchanging information on services that each P2P device can provide by checking service protocols and services that each Wi-Fi device providing Wi-Fi Direct function can exchange request and response messages. Is done to provide.

Assuming that P2P device 1 is a camera and P2P device 2 is a printer, for example, when a user of P2P device 1 wants to print a picture, P2P device 1 needs to check whether P2P device 2 supports the output function of the picture. Therefore, it is possible to check whether the picture output function of the P2P device 2 is possible through the service search.

Create group

To create Wi-Fi Direct's Wi-Fi P2P group, Wi-Fi devices (for example, P2P Device1 and P2P Device2) perform Provision Discovery, which is an important definition defined in the Wi-Fi Direct Specification. One of the features.

In order to use the function of Wi-Fi Direct, P2P devices basically operate based on WSC (Wi-Fi Simple Configuration) (for example, WPS; based on Wi-Fi Protected Setup). In WSC support for optional devices was optional, but it is a mandatory attribute in Wi-Fi Direct.

WPS, one of the specifications of WSC, has a push button configuration (PBC) method to push a button and a pin method to input a pin number. Both PBC method and pin method need to be completed within 120 seconds. There was a ham. For example, in the PBC method, after requesting a wireless connection through a PBC method from one device, the WSC button must be entered within 120 seconds before the WSC Registration Protocol is started, and the SSID (Service Set Identifier) and credentials required for the connection are established. (including information such as authentication type, encryption type, network key, ssid, etc.) as a sum of credentials and cryptographic information.

In order to improve the inconvenience of the conventional WSC (or WPS), the newly defined standard in Wi-Fi Direct is the Provision Discovery method, and the Wi-Fi P2P device (for example, P2P device 1) is different from the Wi-Fi Direct. When a connection is attempted through a conventional WSC (PBC method or PIN method) after searching for a Fi P2P device (for example, P2P device2), another Wi-Fi P2P message is sent by sending a WSC Configuration Method message indicating that the connection is attempted. This is how the user of the device is informed. WSC Configuration Method messages include PBC, PIN from Display, and PIN from Keypad, where the user of the other Wi-Fi P2P device receives the button, and the Display and PIN from Keypad is the pin number for the other Wi-Fi P2P device. By displaying an event or inputting a pin number, a user of another Wi-Fi P2P device may be notified that a Wi-Fi Direct connection is requested.

When the user of the P2P device 1 and the P2P device 2 accepts the Wi-Fi Direct connection and the provision discovery is completed, the Group Owner Negotiation process is performed between the Wi-Fi devices. Since Wi-Fi Direct requires the determination (or setting) of a group owner (GO) to play a central role in the Wi-Fi P2P group being created, the Wi-Fi Direct takes charge of the group owner in order to use the Wi-Fi P2P function. A Group Owner Negotiation process is needed to determine which Wi-Fi device to use. The Group Owner Negotiation process is performed by exchanging GO Negotiation Request, GO Negotiation Response and GO Negotiation Confirm frames. The GO Negotiation Request and GO Negotiation Response include P2P IE information and WSC IE information. Fields of P2P IE include information such as P2P Capability, P2P Device Info, Group Owner Intent, Configuration Timeout, Listen Channel, Extended Listen Timing, Intended P2P Interface Address, Channel List, and Operating Channel attributes. Field includes the information such as DEVICE PASSWORD ID, MANUFACTURER, MODEL NAME, MODEL NUMBER, SERIAL NUMBER, DEVICE NAME.

P2P device 1 and P2P device 2 compare the group owner intent included in the P2P IE, and the device having the large intent value is determined as GO (Group Onwer) and the device having the small intent value is GC ( Group Client). If P2P device 1 and P2P device 2 are determined as GO and GC, respectively, Group Owner Negotiation process is completed.The device set as Group Owner operates as WSC registrar and the device set as Group Client operates as WSC Enrollee. ) Once the provisioning is completed, the group setup process to form a Wi-Fi P2P group is completed.

Then, when the group formation process is completed, the device of the group owner moves to the operating channel to start the role as the group owner, and the device of the group client connects to the group owner through the credentials checked through provisioning. As a result, two P2P devices are connected to the Wi-Fi P2P group.

2 is a block diagram of a mobile terminal according to an embodiment of the present invention. In the embodiment of the present invention, it is assumed that the mobile terminal is a Wi-Fi device.

In the embodiment of the present invention, the mobile terminal is a portable electronic device that can be easily carried, such as a video phone, a mobile phone, a smart phone, an IMT-2000 (International Mobile Telecommunication 2000) terminal, a WCDMA terminal, and a UMTS (Universal Mobile Telecommunication). Service terminal, PDA (Personal Digital Assistant), PMP (Portable Multimedia Player), DMB (Digital Multimedia Broadcasting) terminal, E-Book terminal, portable computer (Notebook, Tablet, etc.) or digital camera (Digital Camera). have. Looking at the portable terminal according to an embodiment of the present invention with reference to FIG.

The wireless transceiver 223 includes an RF unit and a modem. The RF unit includes an RF transmitter for upconverting and amplifying a frequency of a transmitted signal, and an RF receiver for low noise amplifying and downconverting a received signal. The modem MODEM includes a transmitter for encoding and modulating a signal to be transmitted, a receiver for demodulating and decoding a signal received at an RF unit, and the like.

The audio processor 225 may configure a codec, and the codec includes a data codec and an audio codec. The data codec processes packet data and the like, and the audio codec processes audio signals such as voice and multimedia files. The audio processor 225 converts and reproduces an analog audio signal received from a modem through the audio codec, or converts an analog audio signal generated from a microphone into a digital audio signal through the audio codec and transmits the digital audio signal to a modem. Perform the function. The codec may be provided separately or included in the controller 210.

The key input unit 227 may include keys required for input of numeric and character information, function keys necessary for setting various functions, a touch pad, and the like. When the display unit 250 is implemented as a touch display screen method such as capacitive or pressure sensitive, the key input unit 227 may include only a predetermined minimum key, and the display unit 250 may perform key input functions of the key input unit 227. You can replace some of them.

The memory 230 may include a program memory and a data memory. The program memory stores a program for controlling a general operation of the mobile terminal. The memory 230 further includes external memories such as Compact Flash (CF), Secure Digital (SD), Micro Secure Digital (Micro-SD), Mini Secure Digital (Mini-SD), Extreme Digital (xD), and Memory Stick. You may. In addition, the memory 230 may include a disk such as a hard disk drive (HDD) and a solid state disk (SSD).

The Wi-Fi module 240 provides a short range wireless communication function according to the IEEE 802.11 standard. The Wi-Fi module 40 according to the embodiment of the present invention satisfies the specification of Wi-Fi Direct, and provides a function for exchanging data between mobile terminals with a Wi-Fi P2P group formed through the Wi-Fi Direct function. can do. In addition, since the Wi-Fi module 40 according to the embodiment of the present invention satisfies the specification of Wi-Fi Direct, it may also provide an existing legacy Wi-Fi function (for example, a function of wirelessly connecting to an AP). have.

The display unit 250 may be formed of a liquid crystal display (LCD) or an organic light emitting diode (OLED), such as PMOLED or AMOLED, and outputs various display information generated by the mobile terminal. The display unit 250 may include a touch screen such as a capacitive type (or capacitive type) or a pressure sensitive type to operate as an input unit for controlling the mobile terminal together with the key input unit 227.

The controller 210 controls the overall operation of the mobile terminal according to an embodiment of the present invention, and can switch and control the operation of the mobile terminal according to a user input input through the key input unit 227 or the display unit 250. have. If it is determined that the activation of the WPS is requested, the control unit 210 according to an embodiment of the present invention enters the group owner mode of Wi-Fi Direct, and enters the group owner mode, and operates in the WPS registrar mode. Entering a WPS session mode, searching for an access point (AP) or group owner mode activated device having a WPS session in a WPS registrar mode, and discovering a WPS registrar mode When the activated AP is discovered, deactivating the entered WPS registrar mode and group owner mode and activating a WPS session for operating in a WPS Enrollee mode to access the discovered AP. The corresponding operation may be performed.

3 is a flowchart illustrating a Wi-Fi connection process according to a WPS activation request according to an embodiment of the present invention.

In step S301-S303, if it is determined that activation of the WPS is requested, the controller 210 enters the group owner mode of Wi-Fi Direct and controls to enter the WPS session mode capable of operating in the WPS registrar mode.

In the embodiment of the present invention, the Wi-Fi connection has legacy Wi-Fi that performs wireless communication through an AP connection, and Wi-Fi Direct may form a Wi-Fi P2P group with another Wi-Fi device.

If it is determined that the user requests activation of the WPS through the WPS PBC button or the WPS PIN input through the key input using the key input unit 227 or the display unit 250, the controller 210 controls the group owner (WiFi Direct). Activates Group Owner (GO) mode to control group owner (GO) privileges. After acquiring the group owner authority, the controller 210 controls to activate the WPS session so that the mobile terminal can operate in the WPS Registrar mode when the Wi-Fi connection is established.

For example, by controlling the WPS session, which can operate in the WPS registrar mode, to enter the active mode, the control unit 210 controls various communication parameters (SSID, network channel, authentication scheme, etc.) defined by the IEEE 802.11 standard. Control a process for providing a cryptographic method, an encryption key, etc.) to another device.

In step S304-S306, the controller 210 searches for the presence of an AP with a WPS session activated in the WPS Registrar mode or a device (eg, a mobile terminal) with the Group Owner mode activated, thereby enabling the WPS Registrar mode activated. If is found, terminate the WPS session operating in WPS Registrar mode, deactivate the GO mode, and control to activate the WPS session to operate in WPS Enrollee mode.

In step S304, the control unit 210 searches for a device capable of Wi-Fi communication through a channel scan method (IEEE 802.11 scan mode) defined in the specifications of IEEE 802.11, SSID that is various communication parameters defined by the IEEE 802.11 standard By checking the frequency channel, the authentication method, the encryption method, the encryption key, etc., the AP (eg, a Wi-Fi device operating as an AP) in which the WPS Session in the WPS Registrar mode is activated can be found.

In addition, in step S304, the control unit 210 may check the device having the GO (Group Owner) permission through the exchange of messages between Probe Request and Probe Response described in FIG. This is because the device discovered by the following description has a characteristic prefix in the SSID when the device has the group owner authority.

As a result of checking in step S304, when it is confirmed that the AP in which the WPS Session in the WPS Registrar mode is activated is detected, the controller 210 controls the WPS session and the Group Owner mode that were activated in steps S302 to S303 to be deactivated. Subsequently, in step S305-S306, the controller 210 activates a WPS session for allowing a Wi-Fi device (eg, a mobile terminal) to operate in a WPS enrollee mode, thereby discovering an AP (eg, WPS Session in WPS Registrar mode). To access the activated AP). That is, in steps S305-S306, the controller 210 controls to provide a function of a conventional legacy Wi-Fi that provides a wireless communication function by accessing the AP.

Through the steps described through the step S304-S306, the embodiment of the present invention provides an invention that can connect both legacy Wi-Fi and Wi-Fi Direct through a connection method using WPS, while providing an AP access function only through the WPS connection method. It can provide compatibility with legacy Wi-Fi capabilities.

On the other hand, if it is determined in step S304 that a device having GO permission (for example, a device having a group onwer mode enabled) is found, the controller 210 determines and determines a group owner of Wi-Fi Direct in step S307. In response to the result, the control unit forms a Wi-Fi P2P group.

The embodiment of the present invention has been described to utilize the WPS connection method (for example, PBC method), which was applied only when using legacy Wi-Fi, when using Wi-Fi Direct. Accordingly, when a WPS connection is requested, Wi-Fi Direct is performed in step S302. It has been explained that the group owner mode of is automatically activated. The embodiment of the present invention provides a legacy Wi-Fi function through a WPS connection when the AP is searched in step S304, and provides a function of Wi-Fi direct when the group owner GO is searched in step S304.

Therefore, when the device having the GO authority is found in the check result of step S304, which device is the GO (group owner) among the mobile terminal and the discovered device (having the GO authority) according to an embodiment of the present invention. Decision-making should be followed by a group owner selection process.

On the other hand, the group owner setting process described in Figure 1 described an example of determining the group owner by comparing the intent value of the Wi-Fi devices, the mobile terminal according to an embodiment of the present invention already has a group owner authority in step S302 The group owner device found in step S304 has the group owner authority, though. Therefore, in step S307, the present invention needs to reset the group owner between two devices that are group owners.

Meanwhile, the Wi-Fi Direct standard stipulates that the SSID name of the corresponding Wi-Fi device has a prefix of Direct-xy so that the Group Owner can be distinguished from the AP when using the legacy legacy Wi-Fi.

Therefore, in step S307, the control unit 210 is used to determine the group owner by comparing the prefix prefixed with the SSID name, and since the xy two characters are changed in the prefix direct-xy, the control unit 210 The group owner is determined by comparing the xy values.

For example, the mobile terminal according to the embodiment of the present invention acquires the group owner authority in step S302 and has an SSID name of direct-10, and the device discovered to have group owner authority in S304 is an SSID name of direct-09. If it is assumed that the control unit 210 may set the group owner by comparing the value 10 and the value 09. For example, when a device having a high xy value is set to have a group owner authority, the mobile terminal according to an embodiment of the present invention having a value of 10 acquires a group owner authority and has a value of 09. The device acquires the rights of the group client. In this case, although a device having a large prefix has a group owner authority, it will be apparent to those skilled in the art that a device having a small prefix has a group owner authority.

When the group owner is determined by comparing the prefixes, the Wi-Fi Direct Wi-Fi P2P group is formed correspondingly. For example, when the mobile terminal according to an embodiment of the present invention acquires the group owner authority, the controller 210 controls the mobile terminal according to an embodiment of the present invention to maintain a WPS session to operate as a registrar, S304. The device discovered as having the group owner authority in is reset to the group client and operates as an Enrollee.

That is, the mobile terminal according to the embodiment of the present invention has the authority of the group owner, and the device discovered as having the group owner authority in S304 has the authority of the group client, and exchanges credentials with each other, thereby providing Wi-Fi between each other. P2P group will be formed.

Although the present invention has been described in detail so far, it should be apparent that the embodiments mentioned in the process are only illustrative, and not restrictive, and the present invention is provided by the following claims. Within the scope not departing from the scope of the present invention, component changes to the extent that they can be equivalently substituted from the present invention will fall within the scope of the present invention.

Claims (10)

In the Wi-Fi connection method using the Wi-Fi Protected Setup (WPS) in the mobile terminal,
If it is confirmed that WPS activation is requested, entering the group owner mode of Wi-Fi Direct,
Entering the group owner mode, entering a WPS session mode capable of operating in a WPS registrar mode;
Discovering whether there is an AP (Access Point) with WPS session in WPS Registrar mode or a device with group owner mode enabled;
If the WPS registrar mode is activated as a result of the discovery, the WPS registrar mode and the group owner mode are deactivated, and the WPS session for operating in the WPS Enrollee mode is activated to access the discovered AP. Wi-Fi connection method comprising the step of.
The method of claim 1,
The method may further include determining a group owner of Wi-Fi Direct among the mobile terminal and the searched device and forming a Wi-Fi P2P group corresponding to the determination result when the device having the group owner mode is activated is found. WiFi connection method.
The method of claim 2, wherein the forming of the Wi-Fi P2P group comprises:
Comparing the prefix of the SSID name of the mobile terminal generated during the group owner mode entry with the prefix of the SSID name of the discovered device when the device having the group owner mode is activated is found;
And forming the Wi-Fi P2P group according to the comparison result of the prefix.
The method of claim 3, wherein the forming of the Wi-Fi P2P group comprises:
And forming a Wi-Fi P2P group by acquiring a group owner by a device corresponding to a prefix having a large value from among the prefix of the SSID name of the mobile terminal and the prefix of the SSID name of the discovered device. WiFi connection method.
The method of claim 3, wherein the forming of the Wi-Fi P2P group comprises:
And a device corresponding to a prefix having a small value among the prefix of the SSID name of the mobile terminal and the prefix of the SSID name of the searched device, to obtain a group owner authority to form the Wi-Fi P2P group. WiFi connection method.
In the Wi-Fi connected device using the Wi-Fi Protected Setup (WPS) in the mobile terminal,
Wi-Fi module that provides a short-range wireless communication function according to the IEEE 802.11 standard,
A key input unit or display unit for receiving a user's key input;
If it is confirmed that activation of the WPS is requested through the key input unit or the display unit, after entering the group owner mode of Wi-Fi Direct, the device enters the WPS session mode capable of operating in the WPS registrar mode and WPS Registrar mode in the vicinity. Detect whether there is an access point (AP) or group owner mode activated device in which a WPS session is activated, and if the search resulted in an AP in which the WPS registrar mode is activated, deactivate the entered WPS registrar mode and group owner mode. And a controller for activating a WPS session for operating in a WPS Enrollee mode to control access to the discovered AP.
The method of claim 6, wherein the control unit,
As a result of the search, when the device having the group owner mode is activated, the group owner of Wi-Fi Direct is determined from the mobile terminal and the searched device, and the Wi-Fi connection is controlled to form a Wi-Fi P2P group corresponding to the determination result. Device.
The method of claim 7, wherein the control unit,
As a result of the discovery, when the device having the group owner mode is activated, the prefix of the SSID name of the mobile terminal generated during the group owner mode entry process is compared with the prefix of the SSID name of the discovered device.
And controlling to form the Wi-Fi P2P group according to the comparison result of the prefix.
The method of claim 8,
The Wi-Fi P2P group is formed by the device corresponding to the prefix having a large value among the prefix of the SSID name of the portable terminal and the prefix of the SSID name of the discovered device, by obtaining a group owner authority. .
The method of claim 8,
The Wi-Fi P2P group is formed by the device corresponding to the prefix having a small value among the prefix of the SSID name of the mobile terminal and the prefix of the SSID name of the discovered device, by obtaining a group owner authority. .

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