KR101501443B1 - Method for managing group among mobile device having wi-fi direct communication interface - Google Patents

Abstract

The present invention relates to Wi-Fi direct and, more specifically, to a method for managing a group of mobile devices having a Wi-Fi direct communication interface capable of managing a Wi-Fi direct group effectively in the case of creating a group of mobile terminals having a Wi-Fi direct communication interface, joining a group, and leaving, by an owner, a group. According to the present invention, a method for group communications between mobile devices having a Wi-Fi direct communication interface which can create and manage a group of an owner device and a client device in a Wi-Fi direct communication system comprises: dividing devices into a logic level to receive a command from a user and a Wi-Fi direct level to communicate with a neighboring device, and at the same time, creating a group at each level; processing a signal corresponding to an event signal by being synchronized with the event signal at the Wi-Fi direct level when the event signal is generated at the logic level; and processing an event signal by being synchronized with the event signal at the logic level when the event signal is generated at the Wi-Fi direct level.

Description

METHOD FOR MANAGING GROUP AMONG MOBILE DEVICE HAVING WI-FI DIRECT COMMUNICATION INTERFACE [0002]

The present invention relates to Wi-Fi Direct, and more particularly, to Wi-Fi Direct, which can effectively manage Wi-Fi Direct group when creating a group between mobile devices having a Wi-Fi Direct communication interface, To a group management method between mobile devices having a communication interface.

The use of mobile terminals such as smart phones, which provide various various functions, has become commonplace, and as the use of smart phones spreads, various smart devices are also rapidly developing. Generally, smart devices mainly provide various functions by using Wi-Fi communication method using an access point (AP). In recent years, the Wi-Fi Direct function proposed by the Wi-Fi Alliance is highlighted among functions provided by the mobile terminal.

Wi-Fi Direct is a new communication method proposed by the Wi-Fi Alliance. Wi-Fi Direct is a new communication method proposed by Wi-Fi Alliance, (Even if only one side supports Wi-Fi Direct), it provides the function to share data through communication.

Wi-Fi Direct has similar characteristics as short-range communication such as Bluetooth in terms of wireless communication between devices. However, Wi-Fi Direct is superior in terms of transmission range and data transmission speed, and has a one-to- There is a high advantage.

FIG. 1 is an exemplary configuration of a Wi-Fi direct network between general devices. When a Wi-Fi Direct group is formed, the devices communicate with other devices in the group.

In other words, within the group created by Wi-Fi Direct, each device can share media such as photos, music, video, or play games between group participants.

The Wi-Fi Direct group consists of a group owner (100) and a client (200). The owner of the group performs similar functions as the access point. .

The owner of the Wi-Fi Direct group is the first to create a group to be the device that invites the participants, or after the connection decision between the devices that support Wi-Fi Direct, the intent value exchange between devices Can be determined,

After the group is created, when the user requests a Wi-Fi direct connection, the user's Wi-Fi P2P device displays a list of Wi-Fi P2P devices discovered through the device search process, and then displays the Wi- A WiFi direct connection with the device is performed.

 However, when the owner leaves the group because of the intention of the user of the group owner device or communication failure, all the connections in the group are disconnected and the group is disassociated. At this time, if the owner leaves the service regardless of the intention of the user, the group is disassembled and the application program in operation is forcibly terminated.

Korean Patent Laid-Open Publication No. 2013-0016609 "Method and Apparatus for Formation of Wi-Fi Pipe Group Using Wi-Fi Direct" Korean Patent Publication No. 2013-0079839 "WIFI direct connection method"

  It is an object of the present invention to improve the drawbacks of the background art by classifying Wi-Fi direct devices into a logical level at which a user command is input and a Wi-Fi direct level at which actual communication is performed, Between mobile devices with a Wi-Fi Direct communication interface that allows the client devices in the group to reconfigure the Wi-Fi direct level group based on the logical level group information if the group owner should continue to maintain the group after leaving the group Group communication method.

A group communication method for a mobile device having a Wi-Fi Direct communication interface according to the present invention is a method for creating and managing a group between an owner device and a client device in a Wi-Fi direct communication system, And a WiFi direct level in which communication with peripheral devices is performed. At the same time, group generation is performed at each level. When an event signal is generated at a logic level, the signal corresponding to the event signal is processed in synchronization with the WiFi direct level, When the event signal is generated at the Wi-Fi direct level, the event signal is processed at the logic level in synchronization with the event signal.

In addition, in the group generation method, when the group generation command is input at the logical level of the owner device, the owner device searches the neighboring client device through the Wi-Fi direct level, and delivers the client device found at the Wi-Fi direct level of the owner device to the logic level , The logical level of the owner device sends the invitation message for group creation to the client device retrieved through its own WiFi direct level to form a WiFi direct level group and the WiFi direct level of each device is set to the WiFi direct level Group generation information, and the logic level of each device may comprise forming a group between logic levels.

When a withdrawal event of the client device occurs in the logical level group, the client device informs the logical level group of the withdrawal, instructs the WiFi direct level to leave the WiFi group, and each device is connected to the logical level group and the WiFi direct level The group is removed from the client.

When a withdrawal event of the client device occurs in the Wi-Fi direct level group, the owner device transmits the client device withdrawal information at the Wi-Fi direct level to its own logical level, and the logical level of the owner device is transferred to the corresponding client device And the owner device can transmit an information deletion command of the corresponding client device that has left the other client device in the group so that the client device can complete the withdrawal process in the logical level group.

When an event of leaving the owner device occurs in the logical level group, the owner device informs the logical level group of the withdrawal, disassembles the logical level group, issues a group withdrawal to the own WiFi direct level, and dismisses the WiFi direct level group do.

When an event of withdrawal of the owner device occurs in the logical level group, the owner device receives the ownership transfer command through the logical level and transfers the ownership transfer command to the corresponding client device. Lt; RTI ID = 0.0 > of < / RTI >

When an owner device withdrawal event occurs by synchronizing a group of Wi-Fi direct devices to a logical level group and a Wi-Fi direct level to synchronize group information between the levels, other client devices in the group receive a Wi-Fi direct level By reconfiguring the group, other client devices in the group can advantageously reconfigure the group without loss of group information and maintain the group.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is an exemplary diagram of a WiFi direct network between generic devices.
2 is a diagram for explaining the concept of each level of a device to which a group generating method according to the present invention is applied;
3 is a block diagram illustrating a group generation method according to the present invention.
4 is a view for explaining a processing method when a withdrawal event of a client device occurs in a logical level group according to the present invention;
5 is a view for explaining a processing method when a withdrawal event of a client device occurs in a Wi-Fi direct level group according to the present invention;
FIG. 6 is a reference diagram for explaining a processing method when an owner device's withdrawal event occurs in a logical level group according to the present invention; FIG.
7 is a view for explaining a processing method when an owner device's withdrawal event occurs in a Wi-Fi direct level group according to the present invention.
8 is a view for explaining a method of reconfiguring a group after a group owner device according to the present invention is withdrawn.

The description of the present invention is merely an example for structural or functional explanation, and the scope of the present invention should not be construed as being limited by the embodiments described in the text. That is, the embodiments are to be construed as being variously embodied and having various forms, so that the scope of the present invention should be understood to include equivalents capable of realizing technical ideas. Also, the purpose or effect of the present invention should not be construed as limiting the scope of the present invention, since it does not mean that a specific embodiment should include all or only such effect.

All terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. Commonly used predefined terms should be interpreted to be consistent with the meanings in the context of the related art and can not be interpreted as having ideal or overly formal meaning unless explicitly defined in the present invention.

Hereinafter, a group communication method between mobile devices having a Wi-Fi Direct communication interface according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

First, in the present invention, a mobile device having a Wi-Fi Direct communication interface is an electronic device capable of directly communicating with peripheral devices, such as a video phone, a mobile phone, a smart phone, an International Mobile Telecommunication 2000 (IMT- , A WCDMA terminal, a UMTS (Universal Mobile Telecommunication Service) terminal, a PDA (Personal Digital Assistant), a PMP (Portable Multimedia Player), a DMB (Digital Multimedia Broadcasting) terminal, an E-Book, (Digital Camera) or a portable game machine.

FIG. 2 is a diagram for explaining the concept of each level of a device to which a group generation method according to the present invention is applied. Each device of the present invention has a logical level Lv2 of a high level, a WiFi direct level Lv1 of a low level Respectively.

At this time, the logic level (Lv2) enables the use of the Wi-Fi Direct function according to a menu entry or an execution request of an application. An application program or a middleware is installed and a user's operation command is input. A WiFi direct level And actually communicates with neighboring devices.

Each of the devices of the present invention is divided into an owner device and client devices (Client1 and Client2). The owner device manages invitation and withdrawal processing of client devices in the group, manages group disassembly, And the client device means other devices in the group excluding the owner device.

3 is a reference diagram for explaining a group generating method according to the present invention.

First, when a user of the user 1 device executes an application program at a logic level of a higher level and inputs a group generation request signal, a logical level of the user 1 device requires a process of discovery, that is, a process of grasping the existence of a peripheral device And searches for a peripheral device capable of communicating with itself. At this time, it is assumed that the devices of User 2 and User 3 exist in the periphery of User 1, and that the devices of User 2 and User 3 comply with the Wi-Fi Direct specification.

Also, the peripheral device search command is lowered at the logic level, but the search for the actual peripheral device is performed at the WiFi direct level. Accordingly, the user 1 device can search for a client device capable of communicating with a peripheral device through a probe request and probe response message exchange.

The Wi-Fi direct level of the user 1 device reports the retrieved result to the logical level. When the logic level detects the presence of the desired device in the reported search result, the Wi-Fi direct mode executes the Provision Discovery Exchange process with the device, Direct invitation to direct group.

In this case, the probe request includes information such as P2P IE, WSC IE, and Supp Reg IE, and the probe response may include P2P IE, WSC IE, RSN IE, and Supp Reg IE. The field of the P2P IE may 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. In addition, a field of the WSC-IE may include information such as a DEVICE PASSWORD ID, a MANUFACTURER, a MODEL NAME, a MODEL NUMBER, a SERIAL NUMBER, and a DEVICE NAME.

Accordingly, the WiFi direct level of the user 1 device transmits an invitation message to the corresponding client device as shown in FIG. 3A, and when the user device (user 2) receiving the invitation message accepts the invitation, A Wi-Fi direct level group G1 is generated as shown in (b) of FIG. At this time, when the group is created, the user 1 device that created the group becomes the owner of the group (Owner), and the other device becomes the group client (Client 1).

When the Wi-Fi direct level group G1 is generated, the Wi-Fi direct levels of the respective devices transmit the group generation information to the respective logic levels, and the logical level of each device is the Wi- And generates the logic level group G2 according to the information of the level group.

3 (d), another plurality of client devices Client2 can participate in the Wi-Fi direct level group and the logic level group by an additional invitation of the owner device or an additional invitation process of the client (Client1) .

4 is a reference diagram for explaining a processing method when a withdrawal event of a client device occurs in a logical level group according to the present invention.

First, when the withdrawal command is input to the logical level according to the operation of the user of the client device (Client2), the client device (Client2) notifies the logical level group of withdrawal as shown in Fig.

Thus, as shown in FIG. 4 (b), the corresponding client device Client2 in the logical level group G2 is subjected to withdrawal processing.

Then, the client device (Client2) transmits a group withdrawal command to its own WiFi direct level.

Accordingly, the client device Client2 is disconnected from the Wi-Fi direct level group G1 as shown in (c) of FIG.

5 is a reference diagram for explaining a processing method when a withdrawal event of a client device occurs in a Wi-Fi direct level group according to the present invention.

When the client device Client2 leaves the Wi-Fi direct level group G1, the Wi-Fi direct level group G1 is disconnected from the Wi-Fi direct level group G1, (Client2) at the WiFi direct level of the client device.

Then, at the Wi-Fi direct level of the owner device (Owner), the client device (Client 2) withdrawal information is reported to its own logical level as shown in FIG. 5A, and the logical level of the owner device (Client2) that has left the client device (Client1) in the group as shown in (b) of FIG. At this time, the information delete command for the client device (Client2) that has left is transmitted from the logical level of the owner device (Owner) to the Wi-Fi direct level of the owner device (Owner), and the command transmitted to the Wi- Is transferred to the logic level of the client device (Client1) through the Wi-Fi direct level of the client device (Client1).

Then, the client device Client1 deletes the information on the client device Client2 that has left in accordance with the command transmitted to the logic level, and accordingly, the logical level group G2, as shown in FIG. 5C, The withdrawal processing of the client device (Client2) is completed.

6 is a reference diagram for explaining a processing method in a case where an owner device withdrawal event occurs in a logical level group according to the present invention.

First, when a withdrawal instruction is inputted to the logical level group G2 of the owner device according to the operation of the user of the owner device (Owner), the logic level of the owner device (Owner) Notify the level group to unsubscribe. At this time, the logic level of the owner device (Owner) may include, in addition to the group withdrawal command, a process of transferring ownership of the group to another client that becomes the owner of the group on behalf of the owner.

As a result, the owner device (Owner) in the logical level group G2 is disconnected as shown in (b) of FIG.

Then, each of the client devices Client1 and Client2 completes disassembly of the logic level group G2.

Thereafter, the owner device (Owner) transfers the group withdrawal command to the Wi-Fi direct level to disassociate the Wi-Fi direct level group as shown in (c) of FIG.

Thereafter, the group is temporarily dismantled according to the withdrawal of the owner device, but the client device that has received the ownership in the group can reconstruct the group based on the previous logical level group information, and this group reconfiguration is specifically described below .

7 is a reference diagram for explaining a processing method when an owner device's withdrawal event occurs in a Wi-Fi direct level group according to the present invention.

First, the owner device withdrawal in the Wi-Fi direct level group is performed in a force majeure situation such as a communication failure without user's operation. As shown in Fig. 7A, the group is formed at the logical level and the wifi direct level , When the owner device leaves the Wi-Fi direct level group G1, it detects the withdrawal of the owner device at the Wi-Fi direct level of each client device (Client1, Client2).

7 (b), the client devices Client1 and Client2 are disconnected from the logical level of the Wi-Fi direct level group G1 due to the owner device withdrawal Notify.

Then, the logical level of each client device (Client1, Client2) deletes the information of the owner device (Owner) as shown in (c) of FIG. 7 to complete the disassembly of the logical level group G2.

At this time, information of the owner device (Owner) is deleted in the group according to the withdrawal of the owner device (Owner), but the information about the group is not deleted in the logical level of the client devices (Client1 and Client2) do.

FIG. 8 is a reference diagram for explaining a method of reconfiguring a group after an owner device in the group according to the present invention. FIG.

First, when the owner device leaves and the Wi-Fi direct group is disassembled, the remaining clients reconfigure the group based on the logical level group information of the remaining devices except for the previous owner as needed.

First, if the owner device leaves the group at the logical level, but wants to keep the group intact, the owner device can change the ownership of the group to the client device to be the owner of the group on behalf of itself And the withdrawal command is issued as shown in FIG. 8 (b).

Alternatively, when the owner device leaves the group at the Wi-Fi direct level, the client devices in the group select the owner device through decision-making and negotiation based on user information at the previous logic level as needed.

At this time, the owner negotiation process of the group can be performed by exchanging Negotiation Request, Negotiation Response and GO Negotiation Confirm frame, and the Negotiation Request and Negotiation Response can include P2P IE information and WSC IE information.

When the owner is selected through the above process, the selected owner device (Owner) as shown in (c) of FIG. 8 receives the group reconfiguration command at the logical level by the user's operation. Accordingly, the client device that has transferred the ownership allows searching and group invitation to peripheral devices based on the logical level group information of the remaining devices excluding the previous owner.

At this time, the searching method of the peripheral device among the client devices is the same as the searching method of the owner device described above, so a detailed description thereof will be omitted.

Then, based on the retrieved result, the group at the Wi-Fi direct level is reconfigured as shown in (d) of FIG. 8, and the device connection information such as the attribute information of the group or the owner information of the group is updated to perform the logical level group reconfiguration Complete.

As described above, according to the present invention, when the owner device of a group is withdrawn, information about the previous group is maintained at the logical level of each client device, and the group is reconfigured according to the request of the user, Reconfigurable and manageable.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention as defined by the following claims It can be understood that

Lv1: Wi-Fi direct level
Lv2: Logical level
G1: Wi-Fi direct level group
G2: Logic level group

Claims (8)

A method for creating and managing a group between an owner device and a client device in a WiFi direct communication system,
The devices are divided into a logical level for receiving a command from a user and a Wi-Fi direct level for communicating with a peripheral device, and a group is generated at each level,
When the event signal is generated at the logic level, the signal corresponding to the event signal is processed in synchronization with the event signal at the WiFi direct level,
And when the event signal is generated at the Wi-Fi direct level, the mobile terminal processes the event signal at a logic level in synchronization with the event signal.
The method according to claim 1,
Wherein the group reconfiguration is performed between the client devices in the group based on the logical level group information when the group withdrawal event of the owner device occurs in the Wi-Fi direct level. Way.
The method according to claim 1,
The group generation method
When the group creation command is input at the logical level of the owner device, the owner device searches the neighboring client devices through the WiFi direct level,
When the client device retrieved at the Wi-Fi direct level of the owner device is transferred to the logical level, the logical level of the owner device transmits the invitation message for group creation to the client device retrieved through its own Wi-Fi direct level to generate a Wi- Forming,
The Wi-Fi direct level of each device reports Wi-Fi direct level group generation information to its logical level,
Wherein the logic level of each of the devices comprises forming a group between logic levels.
The method according to claim 1,
When a withdrawal event of the client device occurs in the logical level group,
The client device instructs a logic level group withdrawal to its logic level and then instructs its WiFi direct level to leave the WiFi direct level group,
Wherein each of the devices completes the withdrawal processing of the corresponding client device in the logical level group and the Wi-Fi direct level group.
The method according to claim 1,
When a withdrawal event of the client device occurs in the Wi-Fi direct level group,
The owner device transmits client device withdrawal information at the Wi-Fi direct level to its own logical level,
Wherein the logical level of the owner device processes withdrawal of the client device in the logical level group,
Wherein the owner device transmits an information deletion command of the corresponding client device that has left the other client device in the group so that the client device completes the withdrawal processing in the logical level group. Intergroup communication method.
The method according to claim 1,
When an exit event of the owner device occurs in the logical level group,
The owner device issues a group withdrawal command to its own WiFi direct level after instructing the logic level group withdrawal to its logical level to disassemble the WiFi direct level group,
Wherein each client device completes disassembly of a logical level group at a logic level. ≪ RTI ID = 0.0 > 11. < / RTI >
The method according to claim 1,
When an exit event of the owner device occurs in the Wi-Fi direct level group,
Each client device communicates Wi-Fi direct-level group disassembly event information to its logic level,
Wherein each client device deletes the information of the owner device at a logical level to complete the disassembly of the logical level group.
The method according to claim 1,
When an exit event of the owner device occurs in the logical level group and an ownership transfer instruction is input from the owner device
Wherein the owner device transfers a transfer request of ownership to the corresponding client device in accordance with the ownership transfer command input via the logical level,
And the client device that has transferred the ownership reconstructs the group based on the logical level group information of the remaining devices except for the previous owner.

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