WO2014142565A1

WO2014142565A1 - Method and device for configuring link in wireless lan system

Info

Publication number: WO2014142565A1
Application number: PCT/KR2014/002092
Authority: WO
Inventors: 손주형; 곽진삼
Original assignee: 인텔렉추얼디스커버리 주식회사
Priority date: 2013-03-15
Filing date: 2014-03-13
Publication date: 2014-09-18

Abstract

A method and device for configuring a link in a wireless LAN system are disclosed. The wireless link configuration method comprises the steps of: generating a probe request message including wireless service requirements; transmitting the probe request message; and receiving a probe response message, which is a response to the probe request message, from a wireless access device satisfying the wireless service requirements. Therefore, a time for configuring a link between wireless LAN devices can be reduced.

Description

Method and device for link establishment in wireless LAN system

Various embodiments of the present disclosure generally relate to link establishment, and more particularly, to a method and apparatus for fast initial link establishment in a WLAN system.

Recently, with the expansion of mobile terminals, wireless LAN (Wireless LAN) technology that can provide a fast wireless Internet service to them is receiving a lot of attention. WLAN technology is based on wireless communication technology that enables mobile terminals such as smart phones, smart pads, laptop computers, portable multimedia players, and embedded devices to be connected to the Internet wirelessly at home, enterprise, or specific service area. to be.

An object of the present invention is to provide a method for quickly performing a wireless connection in consideration of the performance of a backhaul network to which a wireless access device is connected.

According to an aspect of the present invention, there is provided a method for establishing a wireless link, comprising: generating a probe request message including a radio service requirement, transmitting the probe request message, and And receiving a probe response message in response to the probe request message from a wireless access device that satisfies a wireless service requirement.

In this case, the wireless service requirement may include at least one of a transmission power level, a transmission delay time, a manufacturer's requirement, and an internet access speed.

In accordance with another aspect of the present invention, there is provided a method for establishing a wireless link, the method including: receiving a probe request message from a mobile terminal, and obtaining a wireless service requirement from the probe request message; And transmitting a probe response message in response to the probe request message when a service supported by the radio access device satisfies the radio service requirement.

In this case, the method for establishing a radio link may not transmit a probe response message that is a response to the probe request message when a service supported by the radio access device does not satisfy the radio service requirement.

According to an embodiment of the present invention, when a plurality of WLAN devices request a radio link setting in a congested area, it is possible to save time for link establishment between WLAN devices. In particular, according to an embodiment of the present invention, the mobile terminal may obtain information of the wireless access device in advance, thereby reducing link setting time.

FIG. 1 briefly illustrates a configuration of an example of a WLAN system to which an embodiment of the present invention may be applied.

2 schematically illustrates a step in which a MS establishes a link with an AP according to an embodiment of the present invention.

3 illustrates a passive scanning step of an MS related to an embodiment of the present invention.

4 illustrates an active scanning step of an MS according to an embodiment of the present invention.

5 is a block diagram schematically illustrating a mobile station (MS) according to an embodiment of the present invention.

FIG. 6 is a block diagram schematically illustrating an access point (AP) according to an embodiment of the present invention.

7 illustrates a packet structure of a beacon message transmitted by an AP of the present invention.

8 shows a packet structure of a probe request message transmitted by an MS of the present invention.

9 illustrates a packet structure of a probe response message transmitted by an AP of the present invention.

Since the embodiments described herein are intended to clearly explain the spirit of the present invention to those skilled in the art, the present invention is not limited to the embodiments described herein, and the present invention. The scope of should be construed to include modifications or variations without departing from the spirit of the invention.

The terms used in the present specification and the accompanying drawings are for easily explaining the present invention, and the shapes shown in the drawings are exaggerated and displayed to help understanding of the present invention as necessary, and thus, the present invention is used herein. It is not limited by the terms and the accompanying drawings.

In the present specification, when it is determined that a detailed description of a known configuration or function related to the present invention may obscure the gist of the present invention, a detailed description thereof will be omitted as necessary.

Hereinafter, a method and apparatus for a quick access method between WLAN devices using a plurality of communication channels according to an embodiment of the present invention will be described.

Standardization of MAC (Medium Access Control) and PHY (Physical) layer among the standards of the WLAN technology is progressing through the Institute of Electrical and Electronics Engineers (IEEE) 802.11 working group.

Referring to FIG. 1, a WLAN system includes one or

more BSSs

211 and 221. The BSSs 211 and 221 are a set of devices that can communicate with each other, and are mainly managed by one AP (Access Point, 210). MS (Mobile Station) (110, 120) is responsible for providing a wireless Internet service to the user by accessing the AP (210, 220) in accordance with the IEEE 802.11 WLAN standard.

The

BSSs

211 and 221 may be classified into an Infrastructure BSS and an Independent BSS. FIG. 1 shows an Infrastructure BSS. The BSS-1 211 is managed and operated by the AP-1 210, and one or more MSs (MS-1 110, MS-2 120) are wirelessly connected through the AP-1 210. Receiving a LAN service, the AP-1 210 is connected to the AP-2 220 through a distribution system (DS) 300. BSSs 211 and 221 connected through a single DS 300 are gathered to form an extended Extended Service Set (ESS) 410. Details of the system configuration of the WLAN are described in the IEEE Std 802.11-2012 (29, Mar. 2012) standard, and thus description thereof will be omitted. The contents of this specification are hereby incorporated by reference.

Referring to FIG. 2, the step of connecting the MS 100 to the AP 200 according to the present invention is largely divided into three steps of scanning, authentication, and association. The scanning step is a step in which the MS 100 obtains access information of a BSS operated by the AP 200. As a method for scanning, a passive scanning technique (S101) for acquiring information using only Beacon messages periodically transmitted by the AP and the MS transmits a probe request to the AP (S103) to obtain a probe response from the AP ( S105) There is an active scanning technique for obtaining access information.

Upon successful reception of the wireless access information in the scanning step, the MS 100 transmits an authentication request (S107a) and receives an authentication response (S107b) to perform an authentication procedure. After performing a successful authentication procedure in the IEEE802.11 layer, it is possible to perform the association step (S109a, S109b), and additionally perform 802.1X-based authentication (S111) and IP address acquisition (S113) through DHCP.

Referring to FIG. 3, the MS-1 110 according to the present invention receives a beacon message periodically transmitted from the AP-1 210 and the AP-2 220 located nearby to receive wireless access information of each AP. Acquire.

Referring to FIG. 4, the MS-1 110 according to the present invention transmits a Probe Request message to acquire information of APs located in the vicinity and transmits a Probe Response message corresponding to the AP-1 210 and AP-, respectively. Received from the 2 (220) to obtain the radio access information of each AP.

5 is a block diagram schematically illustrating a mobile station (MS) 100 according to an embodiment of the present invention.

Referring to FIG. 5, the MS 100 according to the present invention includes one or more network interface cards (NICs) 111 to 119 for performing a WLAN access through an AP. The NICs 111 to 119 are modules for performing a WLAN connection and may be internal or external to the MS. The NICs 111 to 119 perform wireless communication with the AP according to the WLAN standard supported by the NICs 111 through 119. The NICs 111 to 119 may operate only one NIC at the same time or operate multiple NICs 111 to 119 at the same time according to the performance and system requirements of the MS 100. In the MS 100 of the block diagram, a plurality of NICs 111 to 119 are separated from each other, and the MAC / PHY layers of the respective NICs operate independently of each other. The plurality of NICs 111 to 119 may be implemented as functional entities that are physically distinguished from each other, or may be integrated into one physical entity.

The mobile communication module 120 enables the MS 100 to transmit and receive a radio signal with an external device in a mobile communication network.

The user input 130 allows a command for controlling the MS 100 to be input by a user.

The display 140 may display a result and a state according to the operation of the MS 100 and may display information provided from the AP.

The memory 150 stores an access program for controlling access to the AP and various data according thereto.

The controller 160 controls the individual NICs 111 through 119 so that the MS 100 attempts to connect to the appropriate band using the access information received from the AP and user and system requirements. .

6 is a block diagram schematically illustrating an access point (AP) 200 according to an embodiment of the present invention.

Referring to FIG. 6, the AP 200 according to the present invention includes one or more network interface cards (NICs) 211 ˜ 219 for operating a BSS in one or more bands. The NICs 211 ˜ 219 are modules for performing a WLAN service and may be internal or external to the AP 200. The NICs 211 ˜ 219 perform wireless communication with the MS according to a standard supported by each of the WLANs. The NICs 211-219 may operate only one NIC (one of 211-219) at the same time or operate multiple NICs 211-219 at the same time according to the performance and system requirements of the AP 200. . The AP 200 of the block diagram shows a plurality of NICs 211 to 219 separated from each other, and each NIC operates independently of each other in the MAC / PHY layer. The plurality of NICs 211 to 219 may be implemented as functional entities that are physically distinguished from each other, or may be integrated into one physical entity.

The memory 250 stores a connection program for managing the connection of the MS and various data thereof.

The controller 260 controls the individual NICs 211 to 219 to access the MS with the appropriate band by using the access information of the plurality of bands and the requirements of the user and the system.

The mobile terminal described with reference to FIG. 5 and the wireless access device described with reference to FIG. 6 may perform the following operations.

A mobile terminal wishing to access a radio access device may generate a probe request message including a radio service requirement. The wireless service requirement may include at least one of a transmission power level, a transmission delay time, a manufacturer's requirement, an internet connection speed, and the like. The mobile terminal can send a probe request message containing the radio service requirements.

Meanwhile, the wireless access device may receive a probe request message sent by the mobile terminal and obtain a wireless service requirement included in the probe request message. The wireless access device may determine whether a service supported by the wireless access device satisfies the wireless service requirement, and determine whether to transmit a probe response message, which is a response to the probe request message, based on the result.

For example, if transmission of a probe response message is allowed when all wireless service requirements are satisfied, the radio access device may probe response which is a response to the probe request message when the service supported by the wireless device satisfies all wireless service requirements. You can send a message. On the other hand, the radio access device does not transmit a probe response message that is a response to the probe request message if the service it supports does not satisfy at least one of the radio service requirements.

As another example, if transmission of a probe response message is allowed when the wireless service requirements satisfy the requirements of the preset number, the wireless access device may request that the service supported by the wireless access device is greater than or equal to the preset number of requirements of the wireless service. If is satisfied, the probe response message, which is a response to the probe request message, may be transmitted. On the other hand, the wireless access device does not transmit a probe response message, which is a response to the probe request message, if a service supported by the wireless access device does not satisfy a requirement of a preset number of wireless service requirements.

The mobile terminal may receive a probe response message that is a response to a probe request message from a wireless access device that satisfies a wireless service requirement. Thereafter, the mobile terminal can access the wireless access device by sequentially performing an authentication process and an association process with the wireless access device.

Claims

A wireless link setting method performed in a mobile terminal,

Generating a probe request message including a wireless service requirement;

Transmitting the probe request message; And

And receiving a probe response message in response to the probe request message from a wireless access device that satisfies the wireless service requirement.
The method according to claim 1,

The wireless service requirement includes at least one of a transmission power level, a transmission delay time, a manufacturer's requirement, and an internet connection speed.
A wireless link setting method performed in a wireless access device,

Receiving a probe request message from a mobile terminal;

Obtaining a wireless service requirement from the probe request message; And

And transmitting a probe response message in response to the probe request message when the service supported by the radio access device satisfies the radio service requirement.
The method according to claim 3,

The wireless link setting method,

And if a service supported by the radio access device does not satisfy the radio service requirement, the probe response message, which is a response to the probe request message, is not transmitted.
The method according to claim 3,

The wireless service requirement includes at least one of a transmission power level, a transmission delay time, a manufacturer's requirement, and an internet connection speed.