KR102098239B1 - Method and apparatus for setting up internet protocol address in a wireless communication system - Google Patents

Abstract

The present invention provides a method in which the client device is assigned an Internet Protocol (IP) address from the group owner device for direct communication between the client device and the group owner device. In the process of transmitting a connection request message to, and receiving a connection response message from the group owner device in response to the connection request message, and in the authentication process (4-way handshake) between the client device and the group owner device The method in which the client device is assigned an IP address including the step of receiving the IP address of the client device allocated from the group owner device.

Description

Method and device for setting Internet protocol address in wireless communication system {METHOD AND APPARATUS FOR SETTING UP INTERNET PROTOCOL ADDRESS IN A WIRELESS COMMUNICATION SYSTEM}

The present invention relates to a method and apparatus for establishing an initial link in a wireless communication system.

The use of high-speed data services is rapidly increasing in a wireless communication system, and a device using the high-speed data service can perform communication using an IP (hereinafter referred to as IP) address. However, if there is no way to set the IP address in the wireless communication system, a method for setting the link of the device is required.

The present invention is for exchanging information necessary for a main communication connection using OOB (Out-of-Band, eg NFC) for fast main communication connection in a wireless communication system, and for setting an IP address according to the determined role of each device. Provide method and apparatus

The present invention also provides a method and apparatus for setting an Internet protocol address in a Near Field Communication (NFC).

In addition, the present invention provides a method and apparatus in which an IP address is assigned in a connection request and connection response message exchange procedure according to the Wi-Fi Direct standard in a wireless communication system.

Method according to an embodiment of the present invention, in a method of setting an Internet Protocol (IP) address between devices in a wireless communication system, the device includes the IP address of the device and the IP address of the counterpart device Transmitting a pair of IP addresses to the counterpart device, and receiving an IP address pair including the IP address of the device and the IP address of the counterpart device proposed by the counterpart device, and among the device and the counterpart device Determining one as a group owner device, determining the other as a client device, and determining an IP address of the device and the counterpart device using a pair of IP addresses proposed by the device determined as the group owner device IP uh This is how to set the dress.
Another method according to an embodiment of the present invention is a method in which the device is assigned an Internet Protocol (IP) address from the counterpart device for direct communication between the device and the counterpart device. The device, through the connection request message (Association Request) through the process of requesting an IP address allocation to the counterpart device determined as the group owner device, and the device through the connection response message (Association Response) corresponding to the connection request message It is a method of receiving an IP address including the step of receiving the IP address of the device allocated from the other device.
Another method according to an embodiment of the present invention is a method in which the client device is assigned an Internet Protocol (IP) address from the group owner device for direct communication between the client device and the group owner device. A client device transmitting a connection request message to the group owner device, a process of receiving a connection response message from the group owner device in response to the connection request message, and an authentication process between the client device and the group owner device In the (4-way handshake), the client device is assigned an IP address including the step of receiving the IP address of the client device allocated from the group owner device.
Another method according to an embodiment of the present invention is a method in which the group owner device allocates an Internet Protocol (IP) address to the client device for direct communication between the client device and the group owner device. A process of a group owner device receiving a connection request message from the client device, a process of transmitting a connection response message to the client device in response to the connection request message, and an authentication process between the group owner device and the client device ( In a 4-way handshake), the group owner device sends an IP address of the client device to the client device.
An apparatus according to an embodiment of the present invention, in a device for setting an Internet Protocol (IP) address in a wireless communication system, including the IP address of the device and the IP address of the other device proposed by the device A transmitter for transmitting a pair of IP addresses to the counterpart device; a receiver for receiving an IP address pair including the IP address of the device and the IP address of the counterpart device proposed by the counterpart device; and one of the device and the counterpart device A device comprising a control unit for determining a group owner device, determining the other one as a client device, and determining an IP address of the device and the counterpart device using a pair of IP addresses proposed by the device determined as the group owner device. All.
Another apparatus according to an embodiment of the present invention, in the device that is assigned an Internet Protocol (IP) address (IP) address from the counterpart device for direct communication between the device and the counterpart device, between the device and the counterpart device A control unit that determines a group owner device and a client device, and when the device is determined to be a client device, a transmission unit that requests IP address allocation to the counterpart device through an association request message, and corresponding to the connection request message It is a device including a receiver that receives an IP address of the device allocated from the counterpart device through an association response message.
Another apparatus according to an embodiment of the present invention is the client device that is assigned an Internet Protocol (IP) address (IP) address from the group owner device for direct communication between the client device and the group owner device, the group owner A transmission unit that transmits a connection request message to a device, and receives a connection response message from the group owner device in response to the connection request message, and in the authentication process (4-way handshake) between the client device and the group owner device, And a receiver configured to receive the IP address of the client device assigned from the group owner device.

Another apparatus according to an embodiment of the present invention is in the group owner device to assign an Internet Protocol (IP) address to the client device for direct communication between the client device and the group owner device, the group owner device The device receives a connection request message from the client device, and sends a connection response message to the client device in response to the connection request message, and an authentication process (4-way handshake) between the group owner device and the client device. In), the group owner device is a group owner device including a transmitter for transmitting the IP address of the client device to the client device.

According to the present invention, when there is no method for setting the IP address in the wireless communication system, the role determination between devices and the IP address are allocated at the same time, so that an IP address can be set at high speed.

1 is a flow chart showing a method for setting an IP address in a short-range wireless communication system (NFC: Near Field Communication hereinafter referred to as NFC) according to a first embodiment of the present invention,
2 is a flowchart illustrating a method for setting an IP address and transmitting and receiving data through an NDEF (NFC Data Exchange Format) message exchange in a wireless communication system according to a first embodiment of the present invention;
3 is a message flow diagram showing a method of assigning an IP address according to a second embodiment of the present invention,
4 is an operation flowchart of a client device according to a second embodiment of the present invention,
5 is an operation flow diagram of a group owner device according to a second embodiment of the present invention,
6 is a flowchart illustrating a process in which an IP address is allocated in a 4-way handshake procedure according to a third embodiment of the present invention,
7 is a diagram showing the message format of EAPOL-Key, a message exchanged in a 4-way handshake procedure,
8 is a diagram showing a basic format for defining a KDE (Key Data Encapsulation) for each group or company in a 4-way handshake procedure;
9 is a diagram showing an IP Address Allocation KDE inserted into a Data field of FIG. 8 according to a third embodiment of the present invention;
10 is a flowchart illustrating a process in which an IP address is allocated in a 4-way handshake procedure according to a fourth embodiment of the present invention,
11 is a diagram showing an IP Address Request KDE inserted into a Data field of FIG. 8 according to a fourth embodiment of the present invention;
12 is a diagram showing an IP Address Allocation KDE inserted into a Data field of FIG. 8 according to a fourth embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. And, in the description of the present invention, if it is determined that a detailed description of related known functions or configurations may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted.

The method proposed in the present invention exchanges information necessary for the main communication connection using OOB (Out-of-Band, eg NFC) for fast main communication connection (In-Band) and determines the It provides a method for users to use network services in a short time by setting the IP addresses required for network services according to their roles. Here, the determined role of the device means that the device is determined to operate as a group owner or client.

Another method proposed in the present invention transfers role determination information and IP configuration information proposed by each of the two devices to the other device through an OOB message exchange, and when a role is determined from the information exchanged with each other, the IP address is determined according to the role. Provides a method of cooking.

In addition, the group owner device replaces the IP setting performed by the Dynamic Host Configuration Protocol (DHCP) Server through a method in which each device transmits the role determination information and the IP address through the OOB message. Suggest how to do it.

1 is a flowchart illustrating a method for setting an IP address in a short-range wireless communication system (NFC: Near Field Communication hereinafter referred to as NFC) according to a first embodiment of the present invention.
Referring to FIG. 1, the first device and the second device perform NFC tagging (step 101). The first device transmits an OOB message to the second device including role determination information (eg, GO intent value in Wi-Fi Direct) and the IP address proposed by the first device and the IP address available to the second device. (Step 103).
In addition, the second device includes the role determination information (eg, GO intent value in Wi-Fi Direct) in the OOB message and the IP address proposed by the second device and the IP address that can be used by the first device to be transmitted to the first device. (Step 105).
Here, IP addresses proposed by the first device and the second device are defined as IP pairs. Each of the devices transmits and receives information for determining a role, and uses an IP pair provided by a counterpart device or an IP pair provided by itself according to the roles of the specified devices.

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That is, when the main communication is connected using a Wi-Fi peer-to-peer (P2P) OOB message, the first device and the second device are group owner intention values (GO Intent Value), which is information for determining the role of each other. The IP pair proposed by each other and each other are included in the OOB message to transmit and receive. The group owner intention value may be used in the same sense as the group information.
For example, the IP pair proposed by the first device assumes that its IP address is 192.168.1.1 and the IP address of the second device is 192.168.1.2, and the IP pair proposed by the second device is the IP address of the first device. It is assumed that is 192.168.10.1 and its IP address is 192.168.10.2.

After the exchange of OOB messages including the IP pair, if the first device is determined to be a P2P group owner (GO: group owner) and the second device is a P2P client (client) (step 107), the IP address of the two devices Uses the IP pair suggested by the first device and ignores the IP pair proposed by the second device (step 109). That is, the IP address of the first device is 192.168.1.1, and the IP address of the second device is determined to be 192.168.1.2 to communicate with each other (step 111).
Conversely, when the first device is determined as a P2P client and the second device is a P2P group owner, the IP pair proposed by the second device is used. That is, the IP address of the first device is 192.168.10.1, and the IP address of the second device is determined to be 192.168.10.2 to communicate with each other.

If the GO Intent Value of the two devices is the same, the terminal that made the connection request first has priority and becomes the Group Owner. Alternatively, the existing P2P Group Owner Negotiation is performed to determine the Group Owner.
In determining the role, a device having a larger value becomes a group owner by comparing each other's group owner intention value. If the intention value of the group owner of the two devices is the same, the device that first requests the connection has priority, and thus can act as a group owner. In addition, it is possible to determine the role of each device by performing an existing P2P group owner negotiation.

On the other hand, the IP address setting and address resolution protocol (ARP: Address Resolution Protocol, hereinafter referred to as ARP) attribute format are shown in Table 1 below.

IP 어드레스 설정 및 ARP 속성 포맷은 상기 <표 1>과 같이, 디바이스간의 역할이 그룹 오너 또는 클라이언트 인지에 따라서 핸드오버 요청(Handover Request) 메시지 및 핸드오버 선택(Handover Select) 메시지에 포함되는 IP 어드레스와 관련된 정보를 정의한다.

As shown in <Table 1>, the IP address setting and ARP attribute format are the IP addresses included in the Handover Request message and the Handover Select message depending on whether the role between devices is a group owner or a client. Define relevant information.

If the first device is negotiated as a group owner, the handover request message adopts the P2P group owner IP address (GO IP Address) and P2P client IP address fields proposed by the first device, and the second device Through the handover selection message, the proposed P2P group owner IP address and P2P client IP address fields are deleted.

2 is a flowchart illustrating a method of setting an IP address and transmitting / receiving data through an NDEF (NFC Data Exchange Format) method for establishing a high-speed link in a wireless communication system according to a first embodiment of the present invention.

Referring to FIG. 2, the first device and the second device perform NFC (Near Field Communication) tagging (steps 201 and 251). Thereafter, the first device and the second device exchange NDEF messages (steps 203 and 253), respectively. The NDEF message includes IP pair configuration information and role determination information. The devices determine a role based on the exchanged information (steps 205 and 255).
For example, when the first device is not a P2P group owner, that is, a P2P client, data is exchanged with the second device using the IP pair provided by the second device (steps 207 and 211). On the other hand, when the first device is not a P2P client, that is, a P2P group owner, data is exchanged with the second device using the IP pair provided by the user (steps 209 and 211). Similarly, in the second device, data is exchanged with the first device in steps 255 to 261 using an appropriate IP pair according to their role.

In the first embodiment of the present invention, a method of setting an IP address through an NFC procedure in a wireless communication system has been described, and in the following second to fourth embodiments, a method of assigning an IP address according to Wi-Fi Direct To suggest.

3 is a message flow diagram showing a method of assigning an IP address according to a second embodiment of the present invention.

Referring to FIG. 3, Probe Request / Response (Step 301), Message Group Owner Negotiation (Step 303), and Wi-Fi Simple Configuration (WSC) (Step 305) of FIG. 3 ), Association Request and Association Response message exchange procedures (steps 307 and 309) and 4-way handshake (step 311) procedures are based on the Wi-Fi Direct standard. The procedure consists of a process in which two devices are performed to find each other, a process for negotiating mutual roles, a process for requesting and responding to interconnections, a process for inquiring an authentication method, and a process for authenticating.
Hereinafter, in the second embodiment, a method of assigning an IP address to each device in an exchange request and association response message exchange procedure according to Wi-Fi Direct is presented.
The connection request message is a message that a device that has become a client through a group owner negotiation procedure requests a connection from the group owner. The connection request message includes a P2P Information Element (IE), and the P2P IE includes items newly proposed by the present invention.
The connection response message is a message transmitted by the group owner device to the client device in response to the connection request message through the group owner negotiation procedure. The connection response message includes a P2P IE, and the P2P IE includes items newly proposed in the present invention.

The client device is assigned an IP address through a connection response message that is a response to the connection request message. That is, the client device puts a group owner address, a client address, a subnet mask, and a router address item into a P2P IE included in the connection request message, thereby group owner Send to the device.
The group owner address item is an item in which an IP address of a group owner to which a client intends to connect is written, and the client address item is an item in which an IP address assigned by the client device is assigned from the group owner device. In addition, in the subnet mask item, information for subnetwork identification to be used by two devices is written, and in the router address item, a gateway address is written.
In order to manage information items in the P2P IE, the client device may manage the group owner address item, the client address item, the subnet mask item, and the router address item as a P2P IP Allocation. When the client device uses the P2P IP Allocation item, the connection request message may use only the P2P IP Allocation item without the lower item.
The group owner device checks whether there is an item such as a group owner address, a client address, a subnet mask, a router address, or a P2P IP Allocation item in the connection request message received from the client device. Fill in and send the connection response message including the IP address information to the client device.
On the other hand, if the value of each item is null in the connection request message received by the group owner device, or if the client device does not put the item in the P2P IE, the group owner device assigns an IP address through a general DHCP procedure. Alternatively, the IP address may not be assigned to the corresponding client device. In addition, when the group owner device receives the connection request message without the above items, the client device does not support the assignment of the IP address proposed by the present invention, and thus the IP address is assigned through the general DHCP procedure.
Like the connection request message, the connection response message may be managed by grouping items such as the group owner address, the client address, the subnet mask, and the router address into upper items called P2P IP Allocation.

As a modification to the second embodiment, it is possible to check whether the group owner device and the client device set the IP address even before performing WSC. In this case, even if the group owner address, the client address, the subnet mask, and the router address are not included in the connection request message, it is possible to check in advance whether the IP address is assigned in the previous probe request / response, group owner negotiation, or WSC procedure. . That is, before exchanging connection request and response messages, the group owner device can know whether the client device supports the assignment of the IP address. Accordingly, if the client device supports the assignment of an IP address, even if the group owner address, the client address, the subnet mask, and the router address item transmit a connection request message with an empty value, the group owner device receives the connection response message. You can send it by including the IP address assigned immediately to. In addition, if it is not possible to support the client device being assigned an IP address, the IP address is assigned through a common DHCP procedure.

4 is an operation flowchart of a client device according to a second embodiment of the present invention.

Referring to FIG. 4, the client device checks whether support for being assigned an IP address is possible (step 401). Thereafter, when support for the assignment of the IP address is possible, a P2P IE specifying that the IP address is assigned is configured to generate a connection request message including the P2P IE (step 403). Since the configuration of the P2P IE is detailed in FIG. 3, detailed description thereof will be omitted. The connection request message generated by the client device is transmitted to the group owner device (step 405).
On the other hand, if the client device does not support being assigned an IP address, the client device generates a general connection request message (step 407) and transmits it to the group owner device (step 405).

5 is an operation flowchart of a group owner device according to a second embodiment of the present invention.

Referring to Figure 5, the group owner device receives a connection request message from the client device (step 501). By analyzing the received connection request message, check the P2P IP Allocation item or group owner address item, client address item, subnet mask item, router address item, etc. required for IP address allocation in the P2P IE included in the message (503) step). That is, check whether there is a request to allocate an IP address. If there are IP address allocation related items in the P2P IE, a connection response message is generated by entering a value for the items (step 505). The group owner device sends the generated connection response message to the client device (step 507).
On the other hand, when the group owner device analyzes the connection request message and there are no items related to the assignment of the IP address to the message, a general connection response message is generated (step 509), and the generated connection response message is transmitted to the client device. (Step 507).

 Hereinafter, in the third and fourth embodiments of the present invention, a method of establishing a link in a wireless communication system proposes a method of assigning an IP address in consideration of security aspects in the 4-way handshake procedure of FIG. 3.

6 is a flowchart illustrating a process in which an IP address is allocated in a 4-way handshake procedure according to a third embodiment of the present invention.

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First, referring to FIG. 6, the group owner device (or Authenticator) transmits an EAPOL-Key message including ANonce to the client device (or Supplicant) (step 601). The ANonce is a random number generated by the group owner device in the 4-way handshake procedure.

After generating the SNonce, the client device generates a Pairwise Temporal Key (PTK) using the received ANonce and PMK (Pairwise Master Key) (step 603). The PMK is a key input by the user or generated / set through a WSC procedure. The SNonce is a random number generated by the client device in the 4-way handshake procedure.
The client device generates an EAPOL-Key message including SNonce, RSN IE (Re Association Request frame or P2P IE included in Association Request frame), and MIC and transmits it to the group owner device (step 605).

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The group owner device generates a PTK using SNonce included in the received EAPOL-Key message, ANonce and PMK used in step 601, performs verification through MIC (Message Integrity Code), and the IP to be used by the client device The address is assigned (step 607). The verification through the MIC is to check whether the key values match.

The group owner device sends an EAPOL-Key message to the client device including ANonce, RSN IE (IE included in the Beacon or Probe Response message), MIC, Group Temporal Key (GTK), and the IP address assigned to the client device. (Step 609).

After the client device receives the IP address transmitted by the PTK, GTK, and group owner device, it transmits an EAPOL-Key message for confirmation to the group owner device (step 611).

In step 609, the IP address assigned by the group owner device to the client device is included in the Key Data field of the EAPOL-Key message, and the Key Data Field follows the format of FIG.
7 is a diagram illustrating the message format of EAPOL-Key, which is a message exchanged in a 4-way handshake procedure.
Referring to FIG. 7, in the 4-way handshake procedure, the client device includes the item requesting the IP address to the group owner device in the key data field of the message format of EAPOL-Key and transmits it to the group owner device. In addition, the group owner device transmits the IP address of the client device and the IP address of the group owner device in the key data field of the EAPOL-Key message format.
8 is a diagram showing a basic format for defining a KDE (Key Data Encapsulation) for each group or company in a 4-way handshake procedure.

Referring to FIG. 8, an OUI (Organization Unique Identifier) may be 50 6F 9A in the case of the Wi-Fi Alliance. The Data Type field is a value that identifies the Key Data Encapsulation (KDE) in which key data exchanged in the 4-way handshake procedure is managed by the OUI organization. The Data field may include, for example, an IP Address Allocation KDE as shown in FIG. 9.
9 shows IP Address Allocation KDE as an example of data.
Referring to FIG. 9, the IP Address Allocation KDE is included in the data field shown in FIG. 8, and includes a client IP address item, a group owner address item, and a subnet mask field. That is, in step e of FIG. 6, the group owner may transmit the client IP address and the group owner IP address to the client device by writing values for each field suggested by the IP Address Allocation KDE.
A method in which an IP address is assigned in a wireless communication system according to a fourth embodiment of the present invention is a method in which a client device (Supplicant) requests an IP address from a group owner device (Authenticator) and then receives an IP address from the group owner device. .

10 is a flowchart illustrating a process in which an IP address is allocated in a 4-way handshake procedure according to the fourth embodiment.
Referring to FIG. 10, the group owner device transmits an EAPOL-Key message including ANonce to the client device (step 1001).

After generating the SNonce, the client device generates a Pairwise Temporal Key (PTK) using the received ANonce and PMK (step 1003). The PMK is a key input by the user or generated / set through WSC.

The client device generates an EAPOL-Key message including SNonce, RSN IE (IE included in the Re Association Request frame or Association Request frame), MIC, and IP address information and transmits it to the group owner device (step 1005). .

The group owner device generates the PTK using SNonce included in the received EAPOL-Key message, ANonce and PMK used in step 1001, performs verification through the MIC, and allocates an IP address to be used by the client device (1007) step).

The group owner device sends an EAPOL-Key message including ANonce, RSN IE (IE included in the Beacon or Probe Response message), MIC, Group Temporal Key (GTK), and the IP address assigned to the client device to the client device. (Step 1009).

The client device receives the PTK, GTK, sets the IP address assigned from the group owner device, and then sends an EAPOL-Key message for verification to the group owner device (step 1011).

In step 1005, the IP address request information transmitted from the client device to the group owner device is included in the Key Data field of the EAPOL-KEY message of FIG. 7 and the Key Data field follows the format of FIG. Accordingly, the OUI (Organization Unique Identifier) of FIG. 8 is an example, and in the case of the Wi-Fi Alliance, it may be 50 6F 9A and an IP Address Request KDE of Data Type.

11 shows an IP address request KDE that is an example of data according to a fourth embodiment of the present invention.

Referring to FIG. 11, the Requested IP Address field may be used by a client device to request a group owner device to request an IP address previously used by the client device, and if the value of the corresponding field is 0, any group assigned by the group owner device It can mean using an address.
The IP Address Lease Time field indicates the time at which the client device needs an IP address. If the field value is 0, it indicates that the group owner device will use it for a designated time, and if it is the maximum value, it means to request an infinite lease.

The IP address assigned to the P2P client device in step 1009 shown in FIG. 10 is included in the Key Data Field of FIG. 7 and follows the format of FIG. 8. OUI is an example, in the case of Wi-Fi Alliance, it can be 50 6F 9A, and as an example of data type, it can be IP Address Allocation KDE.

12 shows IP Address Allocation KDE as an example of data according to a fourth embodiment of the present invention.

Referring to FIG. 12, the Client IP Address field includes an IP address assigned by the group owner device to the client device, which may be an IP address requested by the client device, but may be assigned to a different address by the group owner device depending on the situation. have. The Subnet Mask contains information for distinguishing the sub-network, and the Group Owner Address contains the IP address of the group owner. IP Address Lease Time refers to the time when the IP address is valid, and if this value is the maximum, it means an infinite lease time.

Claims (46)

A method for receiving an Internet Protocol (IP) address (IP) address by the client device for communication between a client device and a group owner (GO) device, the method comprising:
Transmitting an association request message to the GO device;
Receiving a connection response message from the GO device in response to the connection request message;
After receiving the connection response message, receiving, from the GO device, a first extensible authentication protocol over local area network (EAPOL) key frame including a first random number;
After receiving the first EAPOL key frame, transmitting a second EAPOL key frame including a first message integrity check (MIC), and a second random number generated by the client device to the GO device;
After transmitting the second EAPOL key frame, from the GO device, a group temporal key (GTK), a second MIC, an IP address of the client device assigned by the GO device, and an IP address of the GO device Receiving a third EAPOL key frame; And
And after receiving the third EAPOL key frame, transmitting to the GO device a fourth EAPOL key frame for confirmation.
Method for receiving an IP address by a client device.
According to claim 1,
The process of receiving the third EAPOL key frame is used by the IP address of the client device, the IP address of the GO device, and the GO device through IP allocation key data encryption (KDE) included in the third EAPOL key frame. Including the process of receiving the subnet value,
Method for receiving an IP address by a client device.
According to claim 1,
The second EAPOL key frame further includes an IP address request,
Method for receiving an IP address by a client device.
The method of claim 3,
The second EAPOL key frame includes an IP address request KDE for the IP address request,
Method for receiving an IP address by a client device.
According to claim 1,
The second random number is generated based on the first random number and a pairwise master key (PMK),
The third EAPOL key frame further includes an RSN robust security network information element (IE), a message integrity code (MIC),
Method for receiving an IP address by a client device.
A method for allocating an Internet Protocol (IP) address of the client device by the GO device for communication between a client device and a group owner (GO) device, the method comprising:
Receiving an association request message from the client device;
Transmitting a connection response message to the client device in response to the connection request message;
After transmitting the connection response message, transmitting a first extensible authentication protocol over local area network (EAPOL) key frame including a first random number to the client device;
After transmitting the first EAPOL key frame, receiving from the client device a second EAPOL key frame including a first message integrity check (MIC) and a second random number generated by the client device;
After receiving the second EAPOL key frame, the client device includes a group temporal key (GTK), a second MIC, an IP address of the client device assigned by the GO device, and an IP address of the GO device Transmitting a third EAPOL key frame; And
After transmitting the third EAPOL key frame, receiving a fourth EAPOL key frame for confirmation from the client device,
Method for assigning the IP address of the client device by the GO device.
The method of claim 6,
The process of transmitting the third EAPOL key frame is used by the IP address of the client device, the IP address of the GO device, and the GO device through IP allocation key data encryption (KDE) included in the third EAPOL key frame. Including the process of transmitting the subnet value,
Method for assigning the IP address of the client device by the GO device.
The method of claim 6,
The second EAPOL key frame further includes an IP address request,
Method for assigning the IP address of the client device by the GO device.
The method of claim 8,
The second EAPOL key frame includes an IP address request KDE for the IP address request,
Method for assigning the IP address of the client device by the GO device.
The method of claim 6,
The third EAPOL key frame further includes an RSN robust security network information element (IE), and
The method uses a pairwise master key (PMK) and a pairwise master key (PTK) to perform verification of the second MIC and to allocate the IP address to be used by the client device. transient key) further comprising,
Method for assigning the IP address of the client device by the GO device.
A client device for receiving an Internet Protocol (IP) address for communication between a client device and a group owner (GO) device,
Send an association request message to the GO device,
After receiving a first extensible authentication protocol over local area network (EAPOL) key frame, to the GO device, comprising a first message integrity check (MIC) and a second random number generated by the client device Transmit a second EAPOL key frame, and
Configured to transmit a fourth EAPOL key frame for confirmation to the GO device after receiving the third EAPOL key frame,
transmitter; And in response to the connection request message, receiving a connection response message from the GO device,
After receiving the connection response message, the GO device receives the first EAPOL key frame including a first random number, and
Configured to receive the third EAPOL key frame including a group temporal key (GTK), a second MIC, the IP address of the client device assigned by the GO device, and the IP address of the GO device,
Comprising a receiver,
Client device.
The method of claim 11,
The receiver is configured to receive an IP address of the client device, an IP address of the GO device, and a subnet value used by the GO device through IP allocation key data encryption (KDE) included in the third EAPOL key frame. ,
Client device.
The method of claim 11,
The second EAPOL key frame further includes an IP address request,
Client device.
The method of claim 13,
The second EAPOL key frame includes an IP address request KDE for the IP address request,
Client device.
The method of claim 11,
The second random number is generated based on the first random number and a pairwise master key (PMK),
The third EAPOL key frame further includes an RSN robust security network information element (IE),
Client device.
The GO device for allocating an Internet Protocol (IP) address of the client device for communication between a client device and a group owner (GO) device,
Receiving an association request message from the client device,
After transmitting a first extensible authentication protocol over local area network (EAPOL) key frame, from the client device, comprising a first message integrity check (MIC) and a second random number generated by the client device Receiving a second EAPOL key frame, and
Configured to receive a fourth EAPOL key frame for confirmation from the client device after transmitting the third EAPOL key frame,
receiving set; And
In response to the connection request message, transmits a connection response message to the client device,
After transmitting the connection response message, transmit a first EAPOL key frame including a first random number to the client device, and
After receiving the second EAPOL key frame, the third EAPOL including a group temporal key (GTK), a second MIC, an IP address of the client device allocated by the GO device, and an IP address of the GO device Configured to transmit key frames
Comprising a transmitter,
GO devices.
The method of claim 16,
The transmitter is configured to transmit the IP address of the client device, the IP address of the GO device, and the subnet value used by the GO device through IP assignment key data encryption (KDE) included in the third EAPOL key frame. ,
GO devices.
The method of claim 16,
The second EAPOL key frame further includes an IP address request,
GO devices.
The method of claim 18,
The second EAPOL key frame includes an IP address request KDE for the IP address request,
GO devices.
The method of claim 16,
The third EAPOL key frame further includes an RSN robust security network information element (IE), and
To perform verification for the second MIC, and to allocate the IP address to be used by the client device, a pairwise transient key (PTK) is the first random number and a pairwise master (PMK) by the GO device. key),
GO devices.
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