WO2007022700A1 - Procede d'acces au terminal de reseau local, systeme de reseau local et dispositif - Google Patents

Procede d'acces au terminal de reseau local, systeme de reseau local et dispositif Download PDF

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Publication number
WO2007022700A1
WO2007022700A1 PCT/CN2006/002109 CN2006002109W WO2007022700A1 WO 2007022700 A1 WO2007022700 A1 WO 2007022700A1 CN 2006002109 W CN2006002109 W CN 2006002109W WO 2007022700 A1 WO2007022700 A1 WO 2007022700A1
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WO
WIPO (PCT)
Prior art keywords
network
information
local area
area network
terminal
Prior art date
Application number
PCT/CN2006/002109
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English (en)
Chinese (zh)
Inventor
Zhonghui Yao
Original Assignee
Huawei Technologies Co., Ltd.
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 CN 200510093054 external-priority patent/CN1878105A/zh
Priority claimed from CNB2005100930533A external-priority patent/CN100446492C/zh
Priority claimed from CN 200610033765 external-priority patent/CN1852112A/zh
Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2007022700A1 publication Critical patent/WO2007022700A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/54—Store-and-forward switching systems 
    • H04L12/56—Packet switching systems
    • H04L12/5691—Access to open networks; Ingress point selection, e.g. ISP selection
    • H04L12/5692—Selection among different networks
    • 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]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • Local area network terminal accessing local area network method and local area network system and device
  • the present invention relates to the field of network communication technologies, and in particular, to a method for accessing a local area network of a local area network terminal, and a local area network system and apparatus.
  • the wireless local area network 110 includes stations (STA, Station) 111, 112 accessed through an access point (AP, Access Point) 120, and associated with the STAs 111 and 112 under the same AP 120 constitutes a basic service set. (BSS);
  • the wireless local area network 130 includes STAs 131 and 132 accessed through the access point 140, and the STAs 131 and 132 associated with the same AP 140 constitute another BSS; a distribution system (DS, Distribution System) 150 is used to make different
  • the BSS can form a large LAN.
  • the S 150 communicates with the wired LAN 800 through the Portal (portal) 810, so that the aforementioned large local area network and the wired local area network 800 form a larger local area network, which may be called an extended service set (ESS).
  • ESS extended service set
  • WLAN/GSM dual-mode and WLAN/WCDMA dual-mode mobile phones have emerged, which can support users to obtain related services of mobile networks through WLAN, and further support users to switch between WLAN and other wireless networks without interrupting services. .
  • the network side does not notify the STA of the interworking capability and the information of the external network.
  • the WLAN is regarded as a black box
  • the STA has established a WLAN MAC layer link with the network.
  • the STA and other high-level protocols of the network entity are carried to support interworking. That is to say, when an STA scans into a WLAN network, it cannot determine whether the network supports interworking with the corresponding external network; therefore, when there are multiple candidate WLAN networks, the correct network cannot be quickly selected, and the network selection consumes At the time, a large number of unintentional network scans also caused STA battery consumption problems. And when it is required to support fast cross-network switching, such as a service switching from GSM to In the case of WLAN, it is required to determine the target WLAN network in a very short time. The current mechanism is obviously unsupportable.
  • the invention provides a method for a LAN terminal to access a local area network and a local area network system and device, which can reduce the number of attempts to connect, so that the access time is reduced and the terminal power consumption can be reduced.
  • a method for a local area network terminal to access a local area network includes:
  • the local area network terminal acquires network interworking information of the local area network to be accessed;
  • the network interworking information of the local area network terminal to obtain the local area network to be accessed is:
  • the network side sends a broadcast message, and broadcasts its network interworking capability information, or network interworking capability information and external network information;
  • the local area network terminal receives the broadcast message, and obtains network interworking capability information, or network interworking capability information, and external network information.
  • the sending, by the network side, the broadcast message is: the network side sends a management frame, where the network interworking capability information, or the network interworking capability information, and the external network information are carried.
  • the management frame is a beacon management frame or an operation management frame.
  • the network communication information of the local area network terminal to obtain the local area network to be accessed is -.
  • the network side encapsulates the network interworking information into the container information element, and sends a management frame carrying the container information element;
  • the terminal After receiving the management frame, the terminal obtains the container information element, parses and processes the container information element.
  • the network interworking information of the local area network terminal to obtain the local area network to be accessed is specifically:
  • the local area network terminal sends a network interworking information discovery request message to the network side;
  • the network side sends the external network information, the network interworking capability information, or the network interworking capability information and the external network information to the local area network terminal through the network interworking information discovery response message;
  • the LAN terminal obtains the corresponding information.
  • the network communication information of the local area network terminal to obtain the local area network to be accessed is specifically:
  • the network side sends a broadcast message to broadcast its basic network interworking capability information
  • the local area network terminal scans the broadcast message to obtain basic network interworking capability information
  • the local area network terminal sends a network interworking information discovery request message to the network side;
  • the network side sends the specific network interworking capability information, the external network information, or the specific network interworking capability information and the external network information to the local area network terminal through the network interworking information discovery response message;
  • the LAN terminal obtains the corresponding information.
  • the network interworking capability information includes: local area network network owner identification information, network interworking basic capability information, and/or supported online registration method information;
  • the external network information includes: home network identification information, additional Home network information and/or interworking service type information.
  • the network interworking basic capability information includes: whether the indication information of the visitor user access is supported, whether the emergency call is supported, and/or whether the media independent switching is supported.
  • the local area network includes a wired local area network and a wireless local area network; and in the wireless local area network, the network interworking information discovery request message is carried by the probe request management frame or the operation management frame, and the network interworking information discovery response message is Carrying by a probe response management frame or an operation management frame; the external network information is encapsulated as a container information element in a management frame.
  • obtaining, by the local area network terminal, network communication information of a local area network to be accessed Previously it also included:
  • the access point of the wireless local area network obtains the external network information of the external network interworking with the wireless local area network through the distribution system in the wireless local area network.
  • the access point of the WLAN accessing the external network information of the external network interworking with the WLAN through the distribution system in the WLAN is:
  • the distribution system returns an external network information response message to the access point, where the message carries corresponding external network information;
  • the distribution system sends an external network information indication message to the access point, where the message carries corresponding external network information.
  • the method further includes:
  • the local area network terminal When the local area network terminal requests the local wireless network interface to establish a wireless local area network link, the local area network terminal encapsulates the information associated with the external network negotiated with the external network to the container information element, and sends an association request frame carrying the container information element;
  • the network side After receiving the association request frame, the network side obtains the container information element, and parses the container information element;
  • the network side encapsulates the response result into the container information element, and sends an association response frame carrying the container information element;
  • the local area network terminal After receiving the association response frame, the local area network terminal obtains the container information element, parses and processes the container information element.
  • the method further includes:
  • the access point on the network side sends a bearer setup request message to the distribution system, where the message carries the parameter information of the bearer to be established;
  • the distribution system After receiving the message, the distribution system establishes a corresponding bearer according to the parameter information of the bearer, and returns a bearer setup response message to the access point.
  • a local area network system includes: a terminal side wireless office The domain network interface is used to provide an interface for connecting the terminal to the wireless local area network; the network side wireless local area network interface;
  • the terminal side wireless local area network service device is configured to obtain network communication information of the local area network to be accessed; determine whether to access the local area network according to the network interworking information, and request access to the local area network when the determination result is yes.
  • system further includes:
  • the network side wireless local area network service device is configured to cooperate with the terminal side wireless local area network service device to support information exchange between the terminal and the external network through the terminal side wireless local area network interface and the network side wireless local area network interface.
  • system further includes: a network side external network service unit, configured to provide related information of an external network required in the information interaction process;
  • the network side external network information acquiring unit is configured to interact with the network side external network service unit to obtain related related information.
  • the system further includes: a terminal side external network information storage device, configured to store external network related information received by the terminal through the terminal side wireless local area network interface;
  • the terminal side wireless local area network service device further includes: a terminal side external network
  • the information acquiring unit is configured to interact with the terminal-side external network information storage device to obtain related related information.
  • the system further includes an interworking entry entity, disposed between the network side wireless local area network service device and the external network, for implementing interworking between the wireless local area network and the external network information.
  • an interworking entry entity disposed between the network side wireless local area network service device and the external network, for implementing interworking between the wireless local area network and the external network information.
  • the interworking entry entity includes:
  • a bearer service unit is configured to establish a bearer between the interworking entry entity and the wireless local area network, and manage the bearer.
  • the network side external network information acquiring unit is disposed in the interworking entry entity or the network side wireless local area network service device.
  • the terminal side wireless local area network service device includes: a terminal side information encapsulating unit, a terminal side information transmitting unit, and a terminal side information parsing unit;
  • the terminal side information encapsulating unit is configured to encapsulate information or information response requiring interaction into a container information element;
  • the terminal side information transmitting unit is configured to: transmit a container information element from the information encapsulating unit to a terminal side wireless local area network interface; and transmit a message carrying a container information element sent by the network side from the terminal side wireless local area network interface to Terminal side information analysis unit;
  • the terminal side information parsing unit is configured to parse and process a container information element from the terminal side information delivery unit;
  • the network side wireless local area network service device further includes: a network side information encapsulating unit, a network side information transmitting unit, and a network side information parsing unit;
  • the network side information encapsulating unit is configured to encapsulate information that needs to be sent by the network side to the container information element;
  • the network side information transmitting unit is configured to: transfer the container information element from the network side information encapsulating unit to the network side wireless local area network interface; and transmit the message carrying the container information element sent by the terminal side from the network to the side wireless local area network interface Giving a network side information parsing unit;
  • the network side information parsing unit is configured to parse and process a container information element from the network side information delivery unit.
  • a terminal of a local area network system includes: a terminal side wireless local area network interface, configured to provide an interface for connecting the terminal to the wireless local area network; and further comprising: a terminal side wireless local area network service device, configured to acquire Network interworking information of the accessed local area network; determining whether to access the local area network according to the network interworking information, and requesting access to the local area network when the determination result is yes.
  • an access point of a local area network system includes: a wireless local area network interface; and the method further includes: a wireless local area network service device, configured to send a network of a local area network to be accessed to a terminal of the local area network system Interworking information.
  • the network interworking information sent by the WLAN service device includes: network interworking capability information and/or external network information.
  • the wireless local area network service device further includes:
  • the network side external network information acquiring unit is configured to interact with an external network to obtain information about the external network required by the terminal of the local area network system.
  • the local area network terminal learns the network interworking capability of each local area network from the received message on the network side, thereby determining whether the local area network supports the interworking requirement, and accurately selecting a LAN that can be accessed, the local area network.
  • the success rate of access of the terminal can be improved, and the time spent trying to access can be reduced, and the user's satisfaction is improved.
  • the method of the present invention can be applied to other access networks, such as IEEE 802.3 wired local area network and IEEE 802.16 wireless metropolitan area network, in addition to 802.11 wireless local area network.
  • the present invention can also enable the local area network terminal to obtain other auxiliary information related to the interworking of the external network, and the network operation process can support the more flexible network selection strategy of the local area network terminal, so that the terminal can freely select the most desirable access.
  • the internet can also enable the local area network terminal to obtain other auxiliary information related to the interworking of the external network, and the network operation process can support the more flexible network selection strategy of the local area network terminal, so that the terminal can freely select the most desirable access.
  • network capability interworking information and external network information are carried by management frames supported by the corresponding network, or new management frames are added to carry the information. Therefore, in the state 1 and the state 2, the information interaction between the two can be performed, which is particularly advantageous for the rapid network selection based on the corresponding external network information, and avoids the fact that the corresponding external network information can be obtained after the link is established in the prior art. The resulting network selection failure and service delay, terminal power consumption and other issues.
  • the present invention implements an enhanced network discovery mechanism in a wireless local area network system.
  • an AP broadcasts or responds to a STA capability discovery request
  • the AP can obtain external network information, and correctly transmit the corresponding information to the STA by using the external network information service. It realizes the interworking between the WLAN and the external network, and can meet various interoperable application scenarios and end-to-end service requirements.
  • the implementation of the invention makes the WLAN-based networking more flexible and convenient, so as to meet the requirements of interworking between WLAN users and external networks.
  • the WLAN can only be implemented by simply considering the implementation method of the air interface, thereby facilitating the end-to-end provision in the WLAN. Support for QoS, security, etc. of the connection.
  • the implementation of the present invention can also ensure that when the air interface can meet the service QoS requirement and the DS cannot meet the corresponding QoS requirements for a VoIP service, the AP will fail to apply for the DS bearer process for the VoIP service, thereby preventing the VoIP service. The establishment of. The reverse is also true, which ensures that the QoS guarantee of the DS bearer is maintained during a VoIP service.
  • FIG. 1 is a schematic diagram of a basic structure of a prior art WLAN system
  • FIG. 2 is a schematic diagram of the principle of acquiring network interworking information in the present invention
  • FIG. 3 is a flow chart of an embodiment of a method for a local area network terminal to access a local area network according to the present invention
  • FIG. 4 is a flowchart of a process of acquiring network interworking capability information shown in FIG. 3;
  • FIG. 5 is a flow chart of an embodiment of network interworking capability information interaction in the method of the present invention
  • FIG. 6 is a flow chart of another embodiment of network interworking capability information interaction in the method of the present invention.
  • FIG. 7 is a flow chart of another embodiment of network interworking capability information interaction in the method of the present invention.
  • Figure 8 is a block diagram of an embodiment of a local area network system of the present invention.
  • FIG. 9 is a schematic diagram of information exchange between a terminal side and a network side in the system shown in FIG. 8.
  • FIG. 10 is a schematic diagram of an embodiment of transmitting external network broadcast information in the system shown in FIG.
  • FIG. 11 is a schematic diagram of an embodiment of a terminal in the system shown in FIG. 8 for querying an external network through a wireless local area network interface;
  • FIG. 12 is a schematic diagram of an embodiment of establishing a binding relationship between a wireless local area network link and an external network related information in the system shown in FIG. 8;
  • Figure 13 is a block diagram of another embodiment of a local area network system of the present invention.
  • Figure 14 is a block diagram of an interworking entry entity in the system of Figure 13;
  • the present invention is directed to a network selection problem faced by a WLAN as a wireless access network, and proposes a method for a LAN terminal to access a local area network and a local area network system and apparatus, so that the STA passes the pair before selecting the association with the target access network.
  • the AP may acquire the network interworking capability information 230 and the corresponding external network information 240 based on the broadcast mechanism 210 or the request-response mechanism 220, or may simultaneously apply two mechanisms to obtain corresponding information.
  • the broadcast mechanism 210 can carry related information through a beacon frame based on a passive channel scanning mechanism; the request-response mechanism 220 can carry an external network based on an active scanning mechanism, ie, a probe-request frame.
  • the information request, probe response frame (Probe-Response) carries network interworking capability and/or external network information response.
  • the broadcast mechanism and the request-response mechanism can also be managed using the Action management frame.
  • FIG. 3 is a flow chart of a method for a local area network terminal to access a local area network according to the present invention.
  • Step 31 The local area network terminal acquires network interworking information of the local area network to be accessed. Please refer to Figure 4 together.
  • the process of obtaining network communication information includes:
  • Step 410 Receive a message sent by the network side.
  • Step 420 Obtain network interworking information carried in the message.
  • the message sent by the network side may be a message that is actively sent by the network side (for example,
  • the broadcast message may be a message that is sent after the network side receives the request from the terminal (such as a request/response message); or may include an actively delivered message and a message that is sent after receiving the request.
  • Step 32 The network interworking information acquired by the local area network terminal determines the local area network that can be accessed.
  • Step 33 The local area network terminal requests access to the determined local area network.
  • the local area network terminal can accurately select the accessed local area network, and can quickly realize network access in the roaming place.
  • FIG. 5 there is shown a flow diagram of an embodiment of network interworking information interaction in the method of the present invention.
  • Step 510 The AP issues a message of the WLAN network interworking information through a periodic broadcast channel (such as an 802.11 Beacon frame, or an operation management frame).
  • a periodic broadcast channel such as an 802.11 Beacon frame, or an operation management frame.
  • Step 520 The STA obtains the broadcasted WLAN network intercommunication during the scanning.
  • the network interworking information includes network interworking capability information, or network interworking capability information and external network information.
  • FIG. 6 is a flow chart of another embodiment of network interworking information interaction in the method of the present invention.
  • Step 610 The STA initiates a network interworking information discovery request message, for example, sends a Probe Request message.
  • Step 620 The AP responds to the network interworking information discovery request message of the network interworking information discovery request message, for example, the Probe Response message in response to the Probe Request message, carrying the WLAN network interworking information.
  • the network interworking information includes network interworking capability information, external network information, or network interworking capability information and external network information.
  • Step 710 The AP issues a basic WLAN network interworking capability information message through a periodic broadcast channel (such as an 802.11 Beacon frame).
  • a periodic broadcast channel such as an 802.11 Beacon frame.
  • the basic WLAN network interworking capability information includes three parts: (1) WLAN network owner identification information (Network Owner Identifier); (2) network interworking capability information (Network Interworking Capability);
  • the WLA network owner ID is used to indicate who the WLAN network belongs to.
  • the WLAN network owner of the airport may be an airport or a local carrier.
  • the owner of the hotel's WLAN network may be a hotel or a local carrier.
  • the WLAN network owner of the community may belong to the property management department, and so on.
  • SSID is also used to identify the network owner. Since the SSID has its specific semantics, the broadcast WLAN interworking capability information adds a new field to distinguish the WLAN network owner.
  • the STA can determine whether the network belongs to its Home Network through the WLAN network owner identity.
  • the network interworking basic capability information is used to describe the basic summary capability of the interworking capability.
  • the network interworking capability of the response can be expressed by specifying the specific meaning of different bits, including:
  • Visited User Access for example, 1 bit
  • the STA can only select the online access method provided by the local network to access the network.
  • An emergency call (for example, 1 bit), which is used to indicate whether the network supports emergency call services, such as setting 1 for emergency call support, 0 for unsupported, and emergency call-enabled network with interoperability with emergency call center, and Have a call to the emergency call center The ability to call terminal location information.
  • Emergency call services are generally required to be provided free of charge.
  • the MIH (for example, l bit) is used to indicate whether the network supports the MIH standard, that is, it can support the switching of the terminal across different access media. For example, setting 1 to support is supported, and 0 means not supporting. For a multimode terminal that supports MIH, switching between the WLAN network and other networks is required. Therefore, the corresponding WLAN network is required to have the MIH standard support capability.
  • the supported online registration method information indicates the online registration method supported by the network, for example, whether UAM (Universal Access Method, a browser-based hijacking-based access authentication method) is supported.
  • UAM Universal Access Method, a browser-based hijacking-based access authentication method
  • the STA can select the online registration method supported by the network to access the network.
  • the STA can obtain two aspects of information: whether the network belongs to its home network; if the network does not belong to its home network, it can know the specific network interworking capability of the network and the supported online registration method.
  • the STA's home network is A.
  • the STA needs to know whether the WLAN network supports its access and obtains related services. Then, the process proceeds to step 720 to perform interaction, thereby obtaining specific network interworking capability information.
  • the STA should also comprehensively consider other capability information of the network, such as security capability information and QoS capability information, to determine whether the network can meet the requirements of the corresponding service;
  • Other capability information of the network can be obtained by active scanning or passive scanning.
  • Step 720 The STA sends a network interworking information discovery request message to the AP, where the message carries a request for the specific network interworking capability information that the STA needs to obtain the WLAN network.
  • the information carried in the network interworking information discovery request is used to query whether the AP has a roaming relationship with its home network, and whether the corresponding interworking service requirement is supported. Considering that a STA may be loaded with a client program of multiple home networks, the information can be used to simultaneously query the AP's support capabilities for multiple home networks.
  • the content of the information carried in the network interworking information discovery request is as shown in Table 3: Home network number home network information home network information
  • the content of the home network information includes: Home Network Identifier (HNI); Interworking Type continuation (HNI);
  • the type of the interworking service is an external network type that the STA desires to support and
  • Interworking between WLAN and external networks Specific possible types of interworking services include: Intranet access ⁇ ,
  • UMA Unlicensed Band Mobile Access, a WLAN/Bluetooth and GSM/GPRS interworking method
  • the information may be carried by a Probe Request management frame or by an Action management frame.
  • Step 730 The AP responds to the network interworking information discovery response message by the STA, and the message carries the corresponding network interworking capability information determined according to the request, where the network interworking capability discovered by the STA request is included.
  • the result of the home network discovery for each home network mainly includes: (1) Home Network Identifier (HNI);
  • the additional home network information of the network may be further carried, for example:
  • Billing policy for example, the calculation of roaming charges
  • MIH related information When MIH is supported, network side MIH related information; and so on.
  • interworking services are:
  • interworking services include:
  • UMA Unlicensed Band Mobile Access, a WLAN/Bluetooth and GSM/GPRS interworking method
  • the information may be carried by the Probe Response management frame or may be carried by the Action management frame.
  • the network interworking capability information of the basic summary nature may be obtained first by step 710, and further, the more specific STA closely related external network information may pass after Steps 720 and 730 are obtained.
  • the STA when steps 710, 720, and 730 are used to acquire network interworking information, the STA first determines whether the network can satisfy the STA during scanning of the broadcast message.
  • the basic requirements of the access, and the interaction of the steps 720 and 730 are performed on the basis of satisfying the basic requirements, so that the network interworking capability required for the STA access can be supported.
  • a corresponding protection or security mechanism may be provided as needed during the delivery process.
  • the network interworking information discovery mechanism provided by the present invention can be applied to other access networks, such as an IEEE 802.3 wired local area network and an IEEE 802.16 wireless metropolitan area network, in addition to the 802.11 wireless local area network.
  • other access networks such as an IEEE 802.3 wired local area network and an IEEE 802.16 wireless metropolitan area network
  • the above three kinds of information are carried by management frames supported by the corresponding network, or new management frames are added to carry the information.
  • new Ethernet protocol types need to be added to distinguish other data packets to support the delivery of this information.
  • the invention can perform the selection work of the WLAN that can be accessed before the access, so that the success rate of the access can be greatly improved, and the multiple attempts to access are avoided, which saves the time required for the local area network terminal to roam the WLAN.
  • the network interworking information discovery mechanism enables the STA (Local Area Network terminal) to determine whether the WLAN supports the interworking requirement of the STA before attempting to access the WLAN, so that a selectable access can be more accurately selected.
  • WLAN in this way, the success rate of access of the local area network terminal can be greatly improved, and the time spent trying to access can be reduced, and the user's satisfaction is improved.
  • the present invention can also enable the local area network terminal to obtain other auxiliary information related to the external network interworking, such as a charging policy, so that the network operation process can support the STA's more flexible network selection strategy, so that the STA can be free. Choose the network that you most want to access.
  • auxiliary information related to the external network interworking such as a charging policy
  • the terminal side includes: a terminal side wireless local area network interface 81 and a terminal side wireless local area network service device 82.
  • the terminal side wireless LAN interface 81 provides an interface for the terminal to connect to the wireless local area network.
  • the network side includes: a network side wireless local area network interface 91, and a network side wireless local area network service device 92.
  • Terminal side wireless local area network service device 82 and network side wireless local area network service device 92 Information exchange between the support terminal and the external network through the terminal side wireless local area network interface 81 and the network side wireless local area network interface 91 is performed.
  • the terminal side wireless local area network service device 82 obtains the network interworking information of the local area network to be accessed; determines whether to access the local area network according to the network interworking information, and requests access to the local area network when the determination result is yes.
  • the terminal side wireless local area network service device 82 includes: a terminal side information encapsulating unit 821, a terminal side information transmitting unit 822, a terminal side information analyzing unit 823, and a terminal side external network information acquiring unit 824.
  • the terminal side information encapsulating unit 821 is configured to encapsulate information to be sent by the terminal side into a container information element (Container-IE, Container Information Element).
  • Container-IE Container Information Element
  • the terminal side information transfer unit 822 is used to receive the information from the terminal side information encapsulating unit 821.
  • the container-IE transmits the wireless LAN interface to the local end; the message carrying the Container-IE from the network side input by the terminal side wireless local area network interface 81 is transmitted to the terminal side information parsing unit 823 0
  • the Container-IE may be carried by various management frames that are currently defined by 802.11 and various management frames that may be newly added in the future, for transmitting information related to the external network of the terminal.
  • the terminal side information analysis unit 823 is for parsing the Container-IE from the terminal side information transfer unit 822 and further processing it.
  • the terminal side further includes a terminal side external network information storage device 83 for storing external network related information received by the terminal through the terminal side wireless local area network interface 81.
  • the terminal reads the preset corresponding information and compares it with the received external network information, or encapsulates the relevant information into the corresponding management frame of the wireless local area network interface to be transmitted to the network side.
  • the terminal side external network information acquiring unit 824 is configured to interact with the terminal side external network information storage device 82 to acquire related related information.
  • the network side wireless local area network service device 92 includes: a network side information encapsulating unit 921, a network side information transmitting unit 922, a network side information analyzing unit 923, and a network side external network information acquiring unit 924.
  • the network side information encapsulating unit 921 is configured to encapsulate information that needs to be sent by the network side into a container information element ( Container-IE, Container Information Element).
  • the network side information transfer unit 922 is configured to transmit the Container-IE from the network side information encapsulating unit 921 to the local wireless network interface; and transmit the message carrying the Container-IE from the terminal side input by the network side wireless local area network interface 91 to the network.
  • Side information analysis unit 923 is configured to analyze the Container-IE from the network side information encapsulating unit 921 to the local wireless network interface; and transmit the message carrying the Container-IE from the terminal side input by the network side wireless local area network interface 91 to the network.
  • the network side information parsing unit 923 is for parsing the Container-IE from the network side information transfer unit 922 and further processing it.
  • the network side also includes a network side external network service unit 93 for providing information about the external network required in the information interaction process.
  • the external network service unit on the network side refers to some entities of the external network, such as an authentication server, a gateway, and the like of the corresponding external network.
  • the network side external network information obtaining unit 924 is configured to interact with the network side external network information service unit 93 to acquire related related information.
  • the terminal side and the network side perform information interaction in accordance with the following steps.
  • the wireless LAN service device of the information requesting end encapsulates the information requesting the interaction to
  • the Container-IE is passed to the local wireless LAN interface.
  • the wireless LAN interface of the information requesting end sends a management frame selected according to the request type, and the management frame carries the Container-IE;
  • the information carried by the management frame includes two categories: Fields that are not Information Elements, which are fixed at specific positions of the specific management frame structure to represent specific meanings; Information Elements, information elements use a common encoding structure: the first byte is the information element identifier, the second byte is the length, followed by the length is the length of the information content. Different information elements correspond to different information element identifiers (Element IDs).
  • Container-IE is a new information element used in the embodiments of the present invention.
  • the wireless local area network interface of the information receiving end After receiving the management frame, the wireless local area network interface of the information receiving end obtains the Container-IE and transmits the same to the wireless local area network service device of the local end.
  • the wireless local area network service device at the information receiving end parses and processes the Container-IE
  • FIG. 10 shows an embodiment of transmitting external network broadcast information.
  • the specific process is as follows:
  • the network side wireless local area network service device encapsulates the broadcast message in a manner understandable by the terminal, and further encapsulates the message into the Container-IE, and then transmits the Container-IE to the network side wireless local area network interface to request broadcast.
  • the network side wireless LAN interface sends a broadcast frame Beacon or Action, it carries the corresponding Container-IE.
  • the terminal can receive the Beacon or Action and obtain the Container-IE, and the terminal side wireless local area network interface transmits the received broadcast information Container-IE to the terminal side wireless local area network service device.
  • the terminal side wireless local area network service device parses the Container-IE and performs further processing. For example, the content of the Container-IE is analyzed to determine whether the corresponding external network will be accessed through the wireless LAN interface.
  • FIG. 11 shows an embodiment in which a terminal queries an external network through a wireless local area network interface.
  • the specific process is as follows:
  • the terminal side wireless local area network service device encapsulates the query condition in a manner understandable by the peer end (for example, all follows the same protocol and version), and further encapsulates the information into the Container-IE, and then delivers the Container-IE to the terminal side wireless. LAN interface, request query.
  • the terminal side wireless local area network interface sends a probe request frame, where the container-IE that includes the external network query condition is carried.
  • the network side wireless local area network interface After receiving the probe request frame, the network side wireless local area network interface obtains
  • Container-IE which is transmitted to the network side wireless LAN service device.
  • the network side wireless local area network service device parses the query condition included in the Container-IE, further interacts with the external network service unit on the network side according to the requirement, obtains a corresponding query result, and encapsulates the formed query result in a manner understandable by the terminal. Further The encapsulation is Container-IE, which is passed as a query result to the network side wireless LAN interface.
  • the network side wireless local area network interface sends a probe response frame probe response to the terminal side, where the container-IE includes the result of the query of the external network information.
  • the terminal-side wireless LAN interface After receiving the probe response, the terminal-side wireless LAN interface transmits the Container-IE in the terminal to the terminal-side wireless local area network service device.
  • the terminal side wireless local area network service device parses the query result in the Container-IE to determine further processing, for example, the terminal determines whether to access the wireless local area network based on information obtained by the query, such as a roaming relationship, a service capability, and the like.
  • FIG. 12 shows an embodiment of establishing a binding relationship between a wireless local area network link and an external network related information.
  • the Container-IE may also be carried in the corresponding management frame to perform corresponding external network parameter negotiation.
  • some parameters of the WLAN link such as the service set identifier SSID, may be determined based on the content of the Container-IE, and the parameters may be used for the terminal because the parameters are generated based on the corresponding information of the external network or have a certain correspondence.
  • a condition for network selection when switching between different channels of the same local area network. The specific process is as follows:
  • the terminal side wireless local area network service device can transmit a Container-IE when the wireless local area network interface of the local end is requested to establish a wireless local area network link, and includes information associated with the external network negotiated with the opposite end.
  • the terminal side wireless local area network interface sends an association request, and carries the corresponding terminal side wireless local area network interface
  • the network side wireless LAN interface After receiving the association response, the network side wireless LAN interface transmits the Container-IE to the local wireless LAN service device.
  • the network side wireless local area network service device parses the content of the Container-IE, and may include the requested service category and the access authentication method, and forms a corresponding response content according to the local end capability, and encapsulates in a manner that the peer can understand. And further encapsulated into Container-IE, passed to the local wireless LAN interface.
  • the network side wireless local area network service device may also specify a binding parameter of the corresponding to-be-established link, such as an SSID, while feeding back the response's Contain-IE to the local wireless local area network interface.
  • the network side wireless LAN interface responds to the peer association response, where the Container-IE carrying the local response is carried.
  • the terminal-side wireless LAN interface After receiving the peer association response, the terminal-side wireless LAN interface transmits the Container-IE as a link establishment response to the local wireless LAN service device.
  • the terminal side wireless local area network service device unpacks and processes the
  • the DS is required to obtain related external network information to meet the inter-access capability discovery requirement of the STA.
  • the information may be directly configured on the AP, or the external network information service may be used as a DS function, and the AP is provided by the DS.
  • the external network information service obtains the corresponding external network information.
  • another embodiment of the system of the present invention includes a wireless local area network 910, an external network 920, and an interworking entry entity 930.
  • the interworking entry entity 930 is disposed between the wireless local area network 910 and the external network 920. Inter-working is used to implement interworking between two networks.
  • the system further includes an external network information acquisition unit.
  • the external network information obtaining unit 940 is disposed in or independent of the interworking ingress entity 930, and the external network information includes home network identification information, additional home network information, and/or interworking service type information. , and many more.
  • the interworking entry entity 930 further includes a corresponding bearer service unit 931, configured to establish a bearer between the interworking entry entity 920 and the wireless local area network AP 911, and manage the bearer, and the bearer may be in the interworking entry entity based on the bearer.
  • the interworking entry entity 930 is a logical entity connected between the distribution system (DS) 912 and the external network 920.
  • the logical entity may be set on an independent physical entity or may be set in an existing physical entity.
  • Entity, that is, the interworking entry Body 930 is a logical reference point for the WLAN 910 to interface with the external network 920.
  • the packets destined for the external network 920 pass through the interworking entry entity 930.
  • the STA sends a data packet to the external network 920, and the DS 912 receives the address of the address-filling entry entity 930 when forwarding.
  • the data packet of the external network 920 to the STA, the sending address is the interworking entry entity, and the receiving address is the address of the corresponding AP, and then the AP transmits the packet to the STA.
  • WLA can communicate with different external networks through different interworking entry entities, or communicate with different external networks through the same interworking entry entity.
  • the AP Before the WLAN system is running, the AP needs to know the information of each interworking entry entity in the network, and the characteristic information of the external network corresponding to each interworking entry entity, that is, the external network information, for example, the connected external network identifier, and the supported Interworking external network types, such as 3GPP Scenario 2, 3GPP Scenario 3, UMA (Unlicensed Band Mobile Access), IMS (Internet Multimedia Subnet), ISP (Service Provider), Intranet or Internet Information, and so on.
  • the information is referred to as external network information, and the interworking entry entity needs to know its associated external network information.
  • the interworking entry entity may specifically set corresponding information on itself, or the interworking entry entity may also obtain the information by accessing the external.
  • the AP When a user belonging to a specific service provider requests to access the corresponding external network through the WLAN to obtain the corresponding interworking service, the AP must know the corresponding external network information, including providing the required external network information service for the user. , and access control and other information.
  • the external network information service is a newly added DS logical service function, which can be implemented by setting a corresponding external network information service unit.
  • the AP implements the external network information.
  • the active and passive modes are as follows:
  • the passive mode is as shown in step 41, which is specifically:
  • the external network information acquisition unit in the DS directly sends the external network information to the AP, that is, the external network information is carried to the AP through the External-network-information.indication message.
  • the active mode is as shown in step 42 and step 43, and specifically includes: Step 42: The AP initiates an external network information acquiring unit in the DS.
  • Step 43 The external network information obtaining unit in the DS returns an External-network-information.indication message to the ,, where the message carries the requested network information of the eve.
  • the Entrance can be identified by the MAC address, and can also request to query whether there is a roaming relationship between a network operator and the external network. Specific information.
  • the AP can implement the interaction between the access terminal and the external network through the Bearer Service established between the AP and the interworking ingress entity, thereby implementing the relationship between the WLAN and the external network. Interoperability.
  • the authorization data transmitted by the authentication server corresponding to the STA to the corresponding AP may include control information for QoS, security policy, routing, etc., and the AP must separately connect to the air interface according to the information.
  • the interface between the terminals and the DS interface that is, the interface between the AP and the interworking entry entity.
  • the corresponding processing specifically includes:
  • Step 51 The AP sends a bearer.request (bearer request) message to the interworking entry entity.
  • the message can be used by the AP to request a new bearer, change the parameters of the existing bearer, and delete a bearer.
  • Step 52 After receiving the request message, the interworking entry entity in the DS performs corresponding processing and returns a Bearei'.response message, where the message includes whether the request message is successfully executed or failed, and the execution succeeds. When the corresponding parameters are carried.
  • step 53 may also be performed as needed, that is, by mutual in the DS.
  • the gateway entity sends a Bearer.indication message to the AP, which is used to report the usage status of the bearer to the user, such as the packet loss rate.
  • Each bearer has an identifier Bearer ID, which can be sent by the AP to send a Bearer.request request. Created when the bearer is created, or created by the DS successfully created back to Bearer.response. Different Bearer IDs can distinguish different bearers in the message.
  • the Bearer ID may be specifically mapped to a specific port number or address of the underlying transmission technology, so as to perform information interaction between the access terminal and the external network based on the bearer. For example, suppose DS is based on Ethernet, it can provide VLAN (virtual local area network) service, Bearer ID can be mapped to a VLAN port; if DS is based on EP network, Bearer ID can be mapped to a VPN (virtual private network) or PPP (peer-to-peer) ), or a certain PVC (permanent virtual path) of the ATM (Asynchronous Transfer Mode) network, and so on.
  • VLAN virtual local area network
  • PPP peer-to-peer
  • PVC permanent virtual path
  • each bearer is identified by a different bearer ID.
  • the WLAN can only be implemented by considering the implementation method of the air interface, thereby facilitating the QoS and security support of the end-to-end connection in the WLAN.
  • the implementation of the present invention can enhance the network discovery mechanism in the WLAN system. Specifically, when the AP broadcasts or responds to the STA capability discovery request, the AP can correctly transmit the corresponding information to the STA by using the external network information service.
  • the implementation of the present invention can ensure that when the air interface can meet the service QoS requirement and the DS cannot meet the corresponding QoS requirement for a VoIP service, the Ap will fail to apply for the DS bearer process for the VoIP service, thereby preventing the VoIP service.
  • the establishment of. The reverse is also true to ensure that QoS guarantees for DS bearers are maintained during a VoIP service.
  • This embodiment provides a WLAN internal network architecture that supports the interworking between the WLAN and the external network, and meets the requirements of various interworking application scenarios and end-to-end service requirements, so that users in the WLAN network can easily communicate with external networks and perform corresponding operations. Business.
  • the present invention enables a STA that requires interworking with an external network to select a WLAN network Previously, you can know whether the network has interoperability and what kind of interoperability, as well as corresponding external network information.
  • the STA determines whether the WLAN supports its interworking requirements based on the above information.
  • the interworking requirement includes the network accepting the access authentication of the STA home network and the corresponding interworking type (such as internet access, interworking with 3GPP, etc.), or the STA may select an online registration method provided by the network to access the network.
  • the external network when the STA is a multimode terminal supporting MIH (Media Independent Switching), the external network must also have MIH capability to support the MIH function.
  • the above external network information should also include external network MIH related information to help the STA to make network selections across different access media.

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

Abstract

Ce procédé d'accès à un terminal de réseau local consiste à: avant l'accès du terminal du réseau local au réseau local, obtenir d'abord des informations sur la capacité d'interfonctionnement des réseaux locaux d'après le message en provenance du réseau (31); et sélectionner un réseau local d'après les informations de capacités d'interfonctionnement de chaque réseau local (32). Avant la tentative du terminal de réseau local d'accéder à un réseau local, les informations sur la capacité d'interfonctionnement sont reçues avec précision, d'où la réduction du nombre de tentatives de connexion et la diminution du temps d'accès, avec comme conséquence une diminution de la consommation de puissance du terminal. L'invention concerne également un système et un dispositif de réseau local.
PCT/CN2006/002109 2005-08-25 2006-08-18 Procede d'acces au terminal de reseau local, systeme de reseau local et dispositif WO2007022700A1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
CN200510093053.3 2005-08-25
CN 200510093054 CN1878105A (zh) 2005-08-25 2005-08-25 无线局域网与外部网络互通的方法及***
CNB2005100930533A CN100446492C (zh) 2005-08-25 2005-08-25 局域网终端接入局域网的方法
CN200510093054.8 2005-08-25
CN 200610033765 CN1852112A (zh) 2006-02-17 2006-02-17 一种通过无线局域网进行信息交互的***和方法
CN200610033765.0 2006-02-17

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