WO2011091630A1 - Procédé et système de transmission de données dans un réseau de fidélité sans fil (wifi) - Google Patents

Procédé et système de transmission de données dans un réseau de fidélité sans fil (wifi) Download PDF

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Publication number
WO2011091630A1
WO2011091630A1 PCT/CN2010/072496 CN2010072496W WO2011091630A1 WO 2011091630 A1 WO2011091630 A1 WO 2011091630A1 CN 2010072496 W CN2010072496 W CN 2010072496W WO 2011091630 A1 WO2011091630 A1 WO 2011091630A1
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WO
WIPO (PCT)
Prior art keywords
mobile terminal
wifi network
authentication information
identity authentication
wifi
Prior art date
Application number
PCT/CN2010/072496
Other languages
English (en)
Chinese (zh)
Inventor
党海锋
盖萌萌
赵斌
Original Assignee
中兴通讯股份有限公司
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
Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Publication of WO2011091630A1 publication Critical patent/WO2011091630A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
    • H04W74/0816—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA] with collision avoidance

Definitions

  • the present invention relates to a wireless fidelity (WiFi) network technology, and more particularly to a method and system for data transmission in a WiFi network.
  • WiFi wireless fidelity
  • WiFi network is one of the mainstream standards of wireless LAN. It is the same as the Bluetooth network and is a short-range wireless transmission technology that can be used in offices and homes. Compared with Bluetooth technology, WiFi has the following advantages:
  • the WiFi network has a wide coverage.
  • Bluetooth-based radio coverage is very small, with a radius of about 50 feet or so, about 15 meters, and the WiFi technology has a radius of about 300 feet, about 100 meters. Therefore, the WiFi network is within the entire building. Can be used.
  • a new type of switch recently introduced can extend the communication distance of the current WiFi network to 4 miles, or about 6.5 kilometers.
  • the WiFi network is very fast.
  • the transmission speed can reach 54 Mbps, which fully meets the needs of personal and social information.
  • the threshold for manufacturers to enter the field is relatively low. Vendors only need to set up "hot spots” in densely populated areas such as airports, stations, coffee shops, and libraries, and access the Internet through high-speed lines. Here, hotspots are places where wireless Internet services can be provided. In this way, since the "hot spot" emits waves that can reach tens of meters to 100 meters from the access point, users only need a laptop or personal digital assistant (PDA) that supports a local area network (LAN). Personal Digital Assistant ) Get access to the Internet at high speed. In other words, manufacturers do not need to spend money to access network cabling, which saves a lot of cost.
  • PDA personal digital assistant
  • LAN local area network
  • MAC Media Access Control
  • the collision collision problem when sharing two WiFi networks, specifically, the public LAN in two WiFi networks.
  • IEEE 802.11 MAC each mobile node uses carrier sense multiple access/collision avoidance
  • FIG. 1 is a schematic flowchart of the work of the CSMA/CA protocol in the prior art. As can be seen from the figure, in order to avoid collision collisions as much as possible, all mobile stations must wait for a period of time before transmitting the next frame after completing the transmission. Interframe space
  • the length of the interframe space depends on the type of frame the station intends to send. High-priority frames need to wait for a shorter time, giving priority to the right to send, while low-priority frames must wait for a longer period of time. If the low priority frame has not yet arrived and the high priority frame of other mobile stations has been sent to the MAC layer of the WiFi network, the media becomes busy, and the low priority frame is postponed again, thereby reducing collisions. The purpose of the collision opportunity.
  • the mobile station is a mobile terminal.
  • the main object of the present invention is to provide a method for data transmission in a WiFi network.
  • the method and the system solve the defects of avoiding collision collision by using the interframe space in the prior art, thereby improving the processing efficiency of the network.
  • the present invention provides a method for data transmission in a WiFi network, including:
  • the WiFi network that is confirmed by the identity authentication information sent by the mobile terminal sends the data information including the identity identification authentication information to the corresponding mobile terminal.
  • the method before the performing data transmission, the method further includes:
  • the mobile terminal After confirming that the mobile terminal is within the public local area network of multiple WiFi networks, the mobile terminal sends its own identity authentication information to each WiFi network to confirm the WiFi network used.
  • the method further includes:
  • the mobile terminal After the mobile terminal enters the WiFi network, it detects whether it is within the public local area network of multiple WiFi networks based on the Carrier Sense Multiple Access/Collision Detection (CSMA/CD) protocol.
  • CSMA/CD Carrier Sense Multiple Access/Collision Detection
  • the WiFi network used for the confirmation includes:
  • the WiFi network that first obtains the identity authentication information will confirm the WiFi network used by the mobile terminal;
  • the WiFi network sends identity authentication information to the mobile terminal, and the mobile terminal confirms the WiFi network used by itself.
  • the method further includes:
  • the mobile terminal Determining, by the mobile terminal, whether the received identity authentication information is the identity authentication information sent by the WiFi network connected thereto to the mobile terminal, and if yes, the mobile terminal interacts with the connected WiFi network, if not, Then the mobile terminal maintains the existing state without performing any operation.
  • the identity identification authentication information includes: an authentication function flag, an authentication function content, and an authentication function flag direction; Determining whether the received identity authentication information is the identity authentication information sent by the WiFi network connected to the mobile terminal, specifically: the authentication function identifier, the authentication function content, and the authentication function in the identity authentication information The content of the frame occupied by the flag direction is separately identified. If the received authentication function flag and the content of the frame occupied by the authentication function flag are the same as the content of the corresponding frame saved by the mobile terminal, the received identity authentication information is considered to be The identity authentication information sent to the mobile terminal by the WiFi network connected thereto, otherwise, the received identity authentication information is not the identity authentication information sent by the WiFi network connected to the mobile terminal.
  • the invention also provides a system for data transmission in a WiFi network, comprising:
  • a WiFi network configured to send data information including identity authentication information to a corresponding mobile terminal
  • the mobile terminal is configured to receive data information that is sent by the WiFi network and includes identity authentication information.
  • the mobile terminal is further configured to send identity authentication information to each WiFi network after confirming that it is in a public local area network of multiple WiFi networks, and confirm the WiFi network used by the WiFi network with each WiFi network.
  • the determining, by the WiFi network, the WiFi network to be used specifically: the WiFi network that first obtains the identity authentication information is confirmed to be the WiFi network used by the mobile terminal according to the CSMA/CD protocol;
  • the WiFi network transmits identity authentication information to the mobile terminal, and the mobile terminal confirms the WiFi network used accordingly.
  • the mobile terminal is further configured to determine whether the received identity authentication information is the identity authentication information sent by the WiFi network connected to the mobile terminal to the mobile terminal, and confirm that the WiFi network connected thereto is sent to the mobile network. After the identity authentication information of the terminal, the data information is exchanged with the WiFi network.
  • the method and system for data transmission in a WiFi network provided by the present invention each mobile terminal sends an identity identification authentication information to the connected WiFi network side, and after receiving the identity identification authentication information, the WiFi network identifies the authentication information according to the identity identifier.
  • the confirmed WiFi network sends data information including the identity authentication information to the corresponding mobile terminal.
  • each The data information of the mobile terminals will be transmitted under the corresponding WiFi network.
  • collision collisions in the WiFi network can be effectively avoided, and the collision of data collisions can be avoided by increasing the interframe space during the working process of the CSMA/CA protocol.
  • the problem is to improve the efficiency of interaction between the network side and the mobile terminal.
  • FIG. 2 is a schematic flow chart of a method for implementing data transmission in a WiFi network according to the present invention
  • FIG. 3 is a schematic flow chart of a method for implementing step 202 in the process shown in FIG. 2;
  • FIG. 4 is a schematic structural diagram of a data transmission system in a WiFi network according to the present invention. detailed description
  • the basic idea of the present invention is: When performing data transmission, the WiFi network confirmed according to the identity identification authentication information sent by the mobile terminal transmits the data information including the identity identification authentication information to the corresponding mobile terminal.
  • the implementation method of the specific embodiment of the data transmission in the WiFi network of the present invention is as shown in FIG. 2, and includes the following steps:
  • Step 201 After confirming that the mobile terminal is in the public local area network of multiple WiFi networks, the mobile terminal sends its own identity identification authentication information to each WiFi network, and confirms the used WiFi network.
  • the identity authentication information includes: an authentication function flag, an authentication function content, and an authentication function flag direction; the authentication function flag, the authentication function content, and the authentication function flag direction each occupy one frame;
  • the authentication function flag is used to indicate the identity of the mobile terminal; the authentication function content is used to indicate that the mobile terminal has data information sent to the WiFi network; and the authentication function flag direction is used to indicate that the mobile terminal sends data information to the WiFi network;
  • Sending identity authentication information is implemented within the WiFi network
  • the WiFi network After the mobile terminal sends the identity authentication information to each WiFi network, based on the Carrier Sense Multiple Access with Collision Detection (CSMA/CD) protocol, the WiFi network that first obtains the identity authentication information will confirm itself. For the WiFi network used by the mobile terminal, the correspondence between the WiFi network and the mobile terminal is established; and because there is information interaction between the multiple WiFi networks, the WiFi network notifies the correspondence established by other WiFi networks. After receiving the information that the WiFi network has established a corresponding relationship with the mobile terminal, the other WiFi network does not perform data information interaction with the mobile terminal;
  • CSMA/CD Carrier Sense Multiple Access with Collision Detection
  • the WiFi network that first obtains the identity authentication information sends the identity authentication information to the mobile terminal, and the mobile terminal confirms the used WiFi network accordingly;
  • the content of the frame occupied by the identity authentication information changes according to the data of the interaction between the WiFi network and the mobile terminal.
  • the identity authentication information sent by the WiFi network to the mobile terminal is used to indicate the identity of the WiFi network.
  • the content of the authentication function is used to indicate that the WiFi network has data information sent to the mobile terminal.
  • the mobile terminal sends the data information including the identity authentication information to the WiFi network, where the authentication function flag is used to indicate the identity of the mobile terminal, and the authentication function content is used to indicate that the mobile terminal has data information sent to the WiFi network, and the direction of the authentication function flag is used to indicate Is data information sent by the mobile terminal to the WiFi network;
  • Step 202 When performing data transmission, the WiFi network confirmed according to the identity authentication information sends the data information including the identity authentication information to the corresponding mobile terminal, so as to implement interaction with the data information of each mobile terminal.
  • the WiFi network After receiving the identity authentication information, the WiFi network confirms the WiFi network used by the mobile terminal corresponding to the identity authentication information to perform data information interaction, and the other WiFi networks do not interact with the mobile terminal for data information;
  • each data information is transmitted under the corresponding WiFi network, that is, the mobile terminal. Sending the data information to the confirmed WiFi network or the WiFi network confirmed according to the identity authentication information to send the data information to the corresponding mobile terminal, thereby avoiding the collision collision problem;
  • the WiFi network has the same authentication function flag information, authentication function content information, and sort order of the authentication function flag direction information with each mobile terminal.
  • the mobile terminal confirms that it is in the public local area network of the multiple WiFi networks, and includes: after the mobile terminal enters the WiFi network, detecting whether it is within the public local area network of the multiple WiFi networks based on the CSMA/CD protocol, and if yes, Each WiFi network sends identity authentication information to confirm the WiFi network used by itself, otherwise, no processing is performed;
  • Detecting whether it is in the public LAN range of multiple WiFi networks is as follows: The mobile terminal sends a network access request to the WiFi network, and detects whether it is in the public local area network of multiple WiFi networks according to the CSMA/CD technology in the IEEE 802.11 protocol, for example, If the mobile terminal receives an incoming network response returned by multiple WiFi networks, it indicates that the mobile terminal is in multiple WiFi networks. Within the public area network.
  • Step 301 When performing data transmission, the WiFi network confirmed according to the identity authentication information transmits data information including the identity authentication information to the mobile terminal.
  • Step 302 The mobile terminal determines whether the received identity authentication information is the identity authentication information sent by the WiFi network connected to the mobile terminal to the mobile terminal. If yes, step 303 is performed; otherwise, the mobile terminal maintains the existing state. If no operation is performed, the current processing flow is ended. Here, it is determined whether the received identity authentication information is the identity authentication information sent by the WiFi network connected to the mobile terminal, specifically: the authentication function in the identity authentication information.
  • the content of the frame occupied by the logo, the authentication function content, and the direction of the authentication function flag are respectively identified, and the received authentication function flag and the content of the frame occupied by the authentication function flag are the same as the content of the corresponding frame saved by the mobile terminal, and then
  • the received identity authentication information is the identity authentication information sent by the WiFi network connected to the mobile terminal, otherwise, the received identity authentication information is not the identity authentication information sent by the WiFi network connected to the mobile terminal to the mobile terminal.
  • the WiFi network and the mobile terminal transmit or receive data information with identity authentication information, generally no error information is received.
  • the purpose of this step is to ensure that the data information is sent to the WiFi network connected thereto. Data information of the mobile terminal.
  • Step 303 The mobile terminal interacts with the connected WiFi network to perform data information, and ends the current processing process.
  • the data exchange between the mobile terminal and the WiFi network side connected thereto is specifically: the mobile terminal sends the data information including the identity authentication information to the confirmed WiFi network;
  • the network determines whether the received identity authentication information is the identity authentication information sent by the mobile terminal connected thereto, and if so, interacts with the mobile terminal according to the information; otherwise, End the current processing flow.
  • the mobile terminal before transmitting the data information, the mobile terminal has confirmed the used WiFi network according to the identity identification authentication information, and therefore, the data information of each mobile terminal is in the public local area network of multiple WiFi networks.
  • the transmission When the transmission is performed within the range, the transmission will be performed under the corresponding WiFi network. Therefore, the problem of collision of data information collision can be solved without interframe space in the working process of CSMA/CA protocol, thereby improving the interaction between the network side and the user terminal. s efficiency.
  • the present invention further provides a system for data transmission in a WiFi network, the system comprising: a WiFi network 41, and a mobile terminal 42;
  • a WiFi network 41 configured to send data information including identity authentication information to the corresponding mobile terminal 42;
  • the mobile terminal is configured to receive data information that is sent by the WiFi network and includes identity authentication information.
  • the mobile terminal 42 is further configured to send identity authentication information to each WiFi network after confirming that it is within a public local area network of the plurality of WiFi networks, and confirm the WiFi network used by the WiFi network with each WiFi network.
  • the WiFi network used by each WiFi network to confirm itself includes: based on the CSMA/CD protocol, the WiFi network that first obtains the identity authentication information confirms that it is the WiFi network used by the mobile terminal; first obtains the identity authentication information.
  • the WiFi network sends identity authentication information to the mobile terminal, and the mobile terminal confirms the WiFi network used by the mobile terminal accordingly.
  • the mobile terminal 42 is further configured to determine whether the received identity authentication information is the identity authentication information sent by the WiFi network connected to the mobile terminal to the mobile terminal, and confirm the identity authentication sent to the mobile terminal by the WiFi network connected thereto. After the information, the data information is exchanged with the WiFi network.

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

Abstract

La présente invention porte sur un procédé de transmission de données dans un réseau WiFi, qui comprend les opérations suivantes : lorsque les données sont transmises, un réseau WiFi qui est déterminé selon les informations d'identification/authentification d'identité envoyées par un terminal mobile envoie des informations de données qui contiennent les informations d'identification/authentification d'identité au terminal mobile correspondant. La présente invention porte en même temps sur un système de transmission de données dans le réseau WiFi. Avec le procédé et le système de l'invention, une collision dans un réseau WiFi peut être efficacement évitée et le problème d'évitement de collision de données par augmentation de l'espace inter-trame (IFS) dans le processus de fonctionnement du protocole d'accès multiple avec écoute de porteuse et évitement de collision (CSMA/CA) peut être résolu, et en conséquence l'efficacité d'interaction entre le côté réseau et le terminal utilisateur est améliorée.
PCT/CN2010/072496 2010-01-28 2010-05-06 Procédé et système de transmission de données dans un réseau de fidélité sans fil (wifi) WO2011091630A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201010103195.4A CN101820304B (zh) 2010-01-28 2010-01-28 无线保真网络中数据传输的方法及系统
CN201010103195.4 2010-01-28

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WO2011091630A1 true WO2011091630A1 (fr) 2011-08-04

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WO (1) WO2011091630A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107527016A (zh) * 2017-07-25 2017-12-29 西北工业大学 室内WiFi环境下基于动作序列检测的用户身份识别方法

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Publication number Priority date Publication date Assignee Title
CN102883460B (zh) * 2011-07-15 2017-12-05 中兴通讯股份有限公司 一种业务数据传输方法及系统
CN105095711B (zh) * 2014-05-23 2021-08-17 联想(北京)有限公司 数据传输方法及装置

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CN1705290A (zh) * 2004-06-03 2005-12-07 华为技术有限公司 一种接入无线局域网的方法
US20050286456A1 (en) * 2004-06-24 2005-12-29 Mcnew Justin P System and method for broadcasting application-specific information in wireless local area networks

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CN100337450C (zh) * 2002-08-05 2007-09-12 华为技术有限公司 一种虚拟局域网之间的通信方法
WO2007045147A1 (fr) * 2005-10-21 2007-04-26 Huawei Technologies Co., Ltd. Procede, systeme et terminal de reseau d’acces du terminal de reseau local sans fil

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Publication number Priority date Publication date Assignee Title
CN1705290A (zh) * 2004-06-03 2005-12-07 华为技术有限公司 一种接入无线局域网的方法
US20050286456A1 (en) * 2004-06-24 2005-12-29 Mcnew Justin P System and method for broadcasting application-specific information in wireless local area networks

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107527016A (zh) * 2017-07-25 2017-12-29 西北工业大学 室内WiFi环境下基于动作序列检测的用户身份识别方法
CN107527016B (zh) * 2017-07-25 2020-02-14 西北工业大学 室内WiFi环境下基于动作序列检测的用户身份识别方法

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CN101820304B (zh) 2015-01-28

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