WO2014142614A1 - Procédé et dispositif de configuration de liaison dans un système lan sans fil - Google Patents

Procédé et dispositif de configuration de liaison dans un système lan sans fil Download PDF

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Publication number
WO2014142614A1
WO2014142614A1 PCT/KR2014/002187 KR2014002187W WO2014142614A1 WO 2014142614 A1 WO2014142614 A1 WO 2014142614A1 KR 2014002187 W KR2014002187 W KR 2014002187W WO 2014142614 A1 WO2014142614 A1 WO 2014142614A1
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WO
WIPO (PCT)
Prior art keywords
request message
probe request
mobile terminal
probe
message
Prior art date
Application number
PCT/KR2014/002187
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English (en)
Korean (ko)
Inventor
손주형
곽진삼
Original Assignee
인텔렉추얼디스커버리 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020130048960A external-priority patent/KR20140113238A/ko
Application filed by 인텔렉추얼디스커버리 주식회사 filed Critical 인텔렉추얼디스커버리 주식회사
Priority to US14/777,310 priority Critical patent/US20160036705A1/en
Publication of WO2014142614A1 publication Critical patent/WO2014142614A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10—Small scale networks; Flat hierarchical networks
    • H04W84/12—WLAN [Wireless Local Area Networks]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/06—Authentication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/60—Context-dependent security
    • H04W12/69—Identity-dependent
    • H04W12/73—Access point logical identity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/12—Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel

Definitions

  • 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.
  • WLAN Wireless LAN
  • mobile terminals such as smart phones, smart pads, laptop computers, portable multimedia players, and embedded devices
  • mobile terminals such as smart phones, smart pads, laptop computers, portable multimedia players, and embedded devices
  • 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.
  • Another object of the present invention is to provide an apparatus for establishing a wireless link between WLAN devices in a crowded situation due to many wireless devices.
  • a method for establishing a radio link in a second mobile terminal comprising: acquiring a first probe request message transmitted by a first mobile terminal, the first probe request message; Delaying transmission of the second probe request message when the second probe request message is similar to the second probe request message prepared for transmission by the second mobile terminal, and responding to the first probe request message from the wireless access device. Receiving the message, and if the information included in the probe response message satisfies the requirements of the second mobile terminal, withdrawing the transmission of the second probe request message.
  • the delaying of the second probe request message may include delaying the second probe request message by at least the maximum channel time when the SSIDs of the first probe request message and the second probe request message match. have.
  • the method may further include transmitting the second probe request message when the capability item included in the probe response message does not satisfy a requirement of the second mobile terminal. have.
  • the radio link setting method may further include requesting authentication to the radio access apparatus using radio access information obtained from the probe response message.
  • a second mobile terminal for achieving the another object, the control unit for controlling the operation of the second mobile terminal, and at least one network interface for transmitting and receiving data based on the command of the control unit And a card, wherein the controller acquires a first probe request message transmitted by a first mobile terminal, and the first probe request message and the second probe request message prepared by the second mobile terminal are similar. Delay transmission of the second probe request message, receive a probe response message from the wireless access device in response to the first probe request message, and the information contained in the probe response message is a requirement of the second mobile terminal; If the value of the second probe request message of The withdrawal God.
  • the controller may delay the second probe request message by at least the maximum channel time when the SSIDs of the first probe request message and the second probe request message match.
  • the control unit may transmit the second probe request message when the capability item included in the probe response message does not satisfy the requirement of the second mobile terminal.
  • the controller may request authentication from the wireless access device by using the wireless access information obtained from the probe response message.
  • a link establishment time may be reduced by minimizing collision of probe response messages corresponding thereto.
  • FIG. 1 briefly illustrates a configuration of an example of a WLAN system to which an embodiment of the present invention may be applied.
  • FIG. 2 schematically illustrates a step in which a MS establishes a link with an AP according to an embodiment of the present invention.
  • FIG. 3 illustrates a passive scanning step of an MS related to an embodiment of the present invention.
  • FIG 4 illustrates an active scanning step of an MS according to an embodiment of the present invention.
  • FIG. 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.
  • FIG. 7 is a flowchart illustrating a WLAN access procedure when a plurality of MSs quickly access an AP simultaneously according to an embodiment of the present invention.
  • FIG. 8 illustrates the detailed logic of the first analysis in the embodiment of the present invention illustrated in FIG. 7.
  • FIG. 9 illustrates the detailed logic of the second analysis in one embodiment of the present invention illustrated in FIG. 7.
  • FIG. 10 illustrates a packet structure of a beacon message transmitted by an AP of the present invention.
  • FIG. 11 shows a packet structure of a probe request message transmitted by the MS of the present invention.
  • FIG. 12 illustrates a packet structure of a probe response message transmitted by an AP of the present invention.
  • 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.
  • FIG. 1 briefly illustrates a configuration of an example of a WLAN system to which an embodiment of the present invention may be applied.
  • 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
  • MS 110, 120
  • MS 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.
  • 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.
  • ESS Extended Service Set
  • FIG. 2 schematically illustrates a step in which a MS establishes a link with an AP according to an embodiment of the present invention.
  • the scanning step is a step in which the MS 100 obtains access information of a BSS operated by the AP 200.
  • a passive scanning technique S101
  • S103 a passive scanning technique for acquiring information using only Beacon messages periodically transmitted by the AP
  • S105 a probe response from the AP
  • S101 passive scanning technique for acquiring information using only Beacon messages periodically transmitted by the AP
  • S103 a probe request to the AP
  • S105 There is an active scanning technique for obtaining access information.
  • the MS 100 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.
  • FIG. 3 illustrates a passive scanning step of an MS related to an embodiment of the present invention.
  • the MS-1 110 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.
  • FIG 4 illustrates an active scanning step of an MS according to an embodiment of the present invention.
  • the MS-1 110 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 radio access information of each AP.
  • FIG. 5 is a block diagram schematically illustrating a mobile station (MS) 100 according to an embodiment of the present invention.
  • the MS 100 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.
  • 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. .
  • FIG. 6 is a block diagram schematically illustrating an access point (AP) 200 according to an embodiment of the present invention.
  • the AP 200 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.
  • FIG. 7 is a flowchart illustrating a WLAN access procedure when a plurality of MSs simultaneously access an AP according to an embodiment of the present invention
  • FIG. 8 is a detailed diagram of a first analysis in an embodiment of the present invention shown in FIG. 7. The logic is shown, and FIG. 9 shows the detailed logic of the second analysis in one embodiment of the invention shown in FIG.
  • the first mobile terminal 100 may transmit a first probe request message (S103 and S103a).
  • the second mobile terminal 400 may acquire (ie, overhear) the first probe request message transmitted by the first mobile terminal 100.
  • the second mobile terminal 400 may determine the similarity between the second probe request message and the first probe request message that it is preparing to transmit, and as a result, the second probe request message is similar to the first probe request message.
  • the transmission of the second probe request message may be delayed (S202).
  • the second mobile terminal 400 may delay transmission of the second probe request message by at least the maximum channel time (MaxChannelTime).
  • the second mobile terminal 400 may use the first probe request message and the second probe request message. Can be judged to be similar.
  • the second mobile terminal 400 may determine that the first probe request message and the second probe request message are different. . In this case, the second mobile terminal 400 may transmit a second probe request message.
  • the second mobile terminal 400 may further analyze the similarity between probe request messages using an item other than the SSID. For example, when the probe request message includes connection information (ie, band information, transmission rate, load information, etc.), the second mobile terminal 400 may include the first connection included in the first probe request message. The identity of the information and the second connection information included in the second probe request message may be analyzed. As a result, when the connection information is the same, it may be determined that the first probe request message and the second probe request message are similar.
  • connection information is presented as an example of the additional analysis, the method for establishing a radio link according to an embodiment of the present invention is not limited thereto.
  • the wireless access device 200 may transmit a probe response message (or beacon message) in response to the first probe request message (S105 and S105a).
  • the first mobile terminal 100 may receive a probe response message (or beacon message) from the wireless access device 200.
  • the second mobile terminal 400 may obtain (or sniff) a probe response message (or beacon message) from the wireless access device 200. Thereafter, the second mobile terminal 400 may determine whether the capability item included in the probe response message satisfies its requirement, and as a result, the capability item satisfies its requirement. If so, the transmission of the second probe request message may be withdrawn (S206).
  • the second mobile terminal 400 may transmit a second probe request message if the capability item included in the probe response message does not satisfy its requirements.
  • the second mobile terminal 400 may additionally use an item other than the capability item to determine whether to cancel transmission of the second probe request message. For example, when the probe response message includes connection information (ie, bandwidth information, transmission rate, load information, etc.), the second mobile terminal 400 may determine that the connection information included in the probe response message is not capable of satisfying its own requirements. It can be determined whether it is satisfied, and as a result, it can withdraw transmission of the second probe request message if the connection information satisfies its requirements.
  • connection information ie, bandwidth information, transmission rate, load information, etc.
  • the second mobile terminal 400 may transmit the second probe request message when the access information included in the probe response message does not satisfy its requirements.
  • connection information is presented as an example of the additional analysis, the method for establishing a radio link according to an embodiment of the present invention is not limited thereto.
  • the first mobile terminal 100 may transmit a first authentication request message to the wireless access device 200 (S107). Thereafter, the first mobile terminal 100 may access the wireless access device 200 by performing an authentication process and an association process with the wireless access device 200.
  • the second mobile terminal 400 may transmit a second authentication request message to the wireless access device 200 (S207). Thereafter, the second mobile terminal 400 may access the wireless access device 200 by performing an authentication process and a connection process with the wireless access device 200.
  • FIG. 10 illustrates a packet structure of a beacon message transmitted by an AP of the present invention.
  • a radio access device may include a frame control field, a duration / ID field, a destination address field, and a source address
  • Beacon messages include a source address field, a basic service set (BSS) ID field, a sequence control field, a frame body field, and a frame check sequence (FCS) field. I can send it.
  • BSS basic service set
  • FCS frame check sequence
  • the frame body field includes a timestamp field, a beacon interval field, a capability field, a service set identifier (SSID) field, a supported rates field, It may include an operating band (OB) field, an operating channel (OC) field, and the like.
  • OB operating band
  • OC operating channel
  • field information excluding an operation band (OB) field and an operation channel (OC) field in the frame body field may mean BSSI (BSS information), which is access information. That is, the BSSI may include a timestamp field, a beacon interval field, a capability field, a service set identifier (SSID) field, a supported rate field, and the like.
  • BSSI BSS information
  • the BSSI may include a timestamp field, a beacon interval field, a capability field, a service set identifier (SSID) field, a supported rate field, and the like.
  • FIG. 11 shows a packet structure of a probe request message transmitted by the MS of the present invention.
  • the mobile terminal may include a frame control field, a period / ID field, a destination address field, a source address field, and a basic service.
  • the probe request message may include a set (BSS) ID, a sequence control field, a frame body field, and a frame check sequence field (FCS).
  • BSS set
  • FCS frame check sequence field
  • the frame body field may include a service set identifier (SSID) field, a supported rate field, a supporting band (SB) field, and the like.
  • SSID service set identifier
  • SB supporting band
  • FIG. 12 illustrates a packet structure of a probe response message transmitted by an AP of the present invention.
  • the radio access device (ie, the radio access device 200 of FIG. 7) includes a frame control field, a period / ID field, a destination address field, a source address field, a basic service set (BSS) ID field, and a sequence.
  • the probe response message may include a control field, a frame body field, and a frame check sequence (FCS) field.
  • the frame body field includes the BSSI,... Of the mobile terminal having the first network interface card NIC-1. And the BSSI of the mobile terminal having the m-th network interface card (NIC-m).

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé et un dispositif de configuration de liaison dans un système LAN sans fil. Le procédé de configuration de liaison sans fil comprend les étapes consistant : à acquérir un premier message de demande de sondage transmis par un premier terminal mobile ; à retarder la transmission d'un second message de demande de sondage quand le premier message de demande de sondage est similaire au second message de demande de sondage qui est préparé pour une transmission par un second terminal mobile ; à recevoir un message de réponse de sondage, qui est une réponse au premier message de demande de sondage, d'un dispositif d'accès sans fil ; et à retirer la transmission du second message de demande de sondage quand des informations incluses dans le message de réponse de sondage satisfont des exigences du second terminal mobile. Il est ainsi possible de réduire le temps de configuration d'une liaison des dispositifs LAN sans fil.
PCT/KR2014/002187 2013-03-15 2014-03-14 Procédé et dispositif de configuration de liaison dans un système lan sans fil WO2014142614A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US14/777,310 US20160036705A1 (en) 2013-03-15 2014-03-14 Method and device for configuring link in wireless lan system

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
KR10-2013-0028310 2013-03-15
KR20130028310 2013-03-15
KR1020130048960A KR20140113238A (ko) 2013-03-15 2013-04-30 신속한 이동 단말기의 무선 링크 설정을 위한 방법
KR10-2013-0048961 2013-04-30
KR10-2013-0048960 2013-04-30
KR1020130048961A KR20140113239A (ko) 2013-03-15 2013-04-30 신속한 이동 단말기의 무선 링크 설정을 위한 장치

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WO2014142614A1 true WO2014142614A1 (fr) 2014-09-18

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20100083040A (ko) * 2009-01-12 2010-07-21 삼성전자주식회사 무선 통신 채널 제어 방법 및 시스템
KR20100084139A (ko) * 2009-01-15 2010-07-23 한국전자통신연구원 다중 채널을 이용하는 무선랜 시스템에서 매체 접근 제어 방법
KR20110080947A (ko) * 2010-01-07 2011-07-13 엘지전자 주식회사 연결 제어 시스템 및 그 방법
KR20110085836A (ko) * 2010-01-20 2011-07-27 엘지전자 주식회사 무선랜에서 능동 스캐닝 방법 및 장치

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20100083040A (ko) * 2009-01-12 2010-07-21 삼성전자주식회사 무선 통신 채널 제어 방법 및 시스템
KR20100084139A (ko) * 2009-01-15 2010-07-23 한국전자통신연구원 다중 채널을 이용하는 무선랜 시스템에서 매체 접근 제어 방법
KR20110080947A (ko) * 2010-01-07 2011-07-13 엘지전자 주식회사 연결 제어 시스템 및 그 방법
KR20110085836A (ko) * 2010-01-20 2011-07-27 엘지전자 주식회사 무선랜에서 능동 스캐닝 방법 및 장치

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