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 PDFInfo
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- 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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- information
- local area
- area network
- terminal
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Classifications
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- 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
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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]
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- 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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Description
局域网终端接入局域网方法及局域网***和装置
技术领域 本发明涉及网络通信技术领域 ,尤其涉及一种局域网终端接入局 域网的方法及局域网***和装置。
背景技术
现有技术中, IEEE 802.11定义的 WLAN***的基本结构如图 1 所示。该 WLAN***中,无线局域网 110包括通过接入点(AP, Access Point ) 120接入的站点 (STA, Station ) 111、 112, 关联到同一个 AP 120下的 STA 111、 112构成一个基本服务集(BSS ); 无线局域网 130 包括通过接入点 140接入的 STA131、 132, 关联到同一个 AP 140下 的 STA 131、 132构成另一个 BSS;分发***( DS, Distribution System ) 150用于使不同的 BSS之间能够组成一个大的局域网。此外, S 150 通过 Portal (门户) 810和有线局域网 800通信, 使得前述大的局域 网和有线局域网 800 组成一个更大的局域网, 可称之为扩展服务集 ( ESS )。
目前 WLAN应用的一个主要趋势是与其他网絡的融合。 例如, 目前已经出现了 WLAN/GSM双模和 WLAN/WCDMA双模手机, 可 以支持用户通过 WLAN来获得移动网络的相关业务, 以及进一步支 持用户在 WLAN与其它无线网络之间的切换而不中断业务。
现有技术中, 在 STA与 AP建立关联之前, 网络侧并不向 STA 通知其互通能力以及外部网络的信息, 在实现 WLAN与其他外部网 络的互通时, 是将 WLAN看作一个黑盒子, 假定 STA已经与网络建 立了一条 WLAN MAC层链路, 在此链路上, 承载 STA与网络实体 其他高层协议,以支持互通。也就是说,当一个 STA扫描到一个 WLAN 网络时, 并不能确定该网络是否支持与相应的外部网络互通; 因此, 当存在多个候选 WLAN网络时, 不能快速地选择正确的网络, 网络 选择耗时, 且大量的漫无目的的网络扫描也带来 STA电池消耗问题。 而且当要求支持快速的跨网络切换, 如一个业务从 GSM 切换到
WLAN时, 更是要求以极短的时间确定目标 WLAN网絡, 目前的这 种机制显然是无法支持的。
发明内容
本发明提供一种局域网终端接入局域网的方法及局域网***和 装置, 可以减少尝试连接的次数, 使得接入的时间减少且终端耗电量 可以降低。
根据本发明的一个方面, 一种局域网终端接入局域网的方法, 包 括:
局域网终端获取待接入的局域网的网络互通信息;
根据所述的网络互通信息确定是否接入该局域网,并在确定为是 时请求接入所述的局域网。
可选地,所述局域网终端获取待接入的局域网的网络互通信息具 体为:
网络侧发送广播消息, 广播其网络互通能力信息、或网络互通能 力信息和外部网絡信息;
所述局域网终端接收所述的广播消息 , 获取网络互通能力信息、 或网络互通能力信息和外部网絡信息。
可选地, 所述网络侧发送广播消息为: 网络侧发送管理帧, 其中 携带网络互通能力信息、 或网络互通能力信息和外部网络信息。
可选地, 所述管理帧为信标管理帧或操作管理帧。
可选地,所述局域网终端获取待接入的局域网的网络互通信息具 体为-.
网络侧将网络互通信息封装到容器信息元素,并发送携带有所述 容器信息元素的管理帧;
终端接收所述的管理帧后获得所述的容器信息元素,解析并处理 所述的容器信息元素。
可选地,所述局域网终端获取待接入的局域网的网络互通信息具 体为:
局域网终端向网络侧发送网络互通信息发现请求消息;
网络侧将外部网絡信息、 网络互通能力信息、或者网络互通能力 信息和外部网絡信息通过网络互通信息发现响应消息发送给局域网 终端;
局域网终端获取相应的信息。
可选地, 局域网终端获取待接入的局域网的网络互通信息具体 为:
网络侧发送广播消息, 广播其基本网络互通能力信息;
所述局域网终端扫描所述的广播消息 ,获取基本网络互通能力信 息;
局域网终端向网络侧发送网络互通信息发现请求消息;
网络侧通过网络互通信息发现响应消息将具体网络互通能力信 息、 外部网络信息、或者具体网络互通能力信息和外部网络信息发送 给局域网终端;
局域网终端获取相应的信息。
可选地, 所述的网络互通能力信息包括: 局域网网络所有者标识 信息、 网络互通基本能力信息和 /或支持的在线注册方法信息; 所述 的外部网络信息包括: 归属网络标识信息、 附加的归属网络信息和 / 或互通业务类型信息。
可选地, 所述的网络互通基本能力信息包括: 是否支持拜访者用 户接入的指示信息、 是否支持紧急呼叫和 /或是否支持媒体独立的切 换的指示信息。
可选地, 所述的局域网包括有线局域网和无线局域网; 且在无线 局域网中 ,所述的网络互通信息发现请求消息通过探测请求管理帧或 操作管理帧携带,所述的网络互通信息发现响应消息通过探测响应管 理帧或操作管理帧携带;所述的外部网络信息封装为管理帧中的容器 信息元素。
可选地,在所述局域网终端获取待接入的局域网的网络互通信息
之前, 还包括:
无线局域网的接入点通过无线局域网中的分发***获取与该无 线局域网互通的外部网络的外部网络信息。
可选地,所述的无线局域网的接入点通过无线局域网中的分发系 统获取与该无线局域网互通的外部网络的外部网络信息为:
所述接入点向分发***发送外部网络信息请求报文;
所述分发***向接入点返回外部网络信息响应报文,报文中携带 相应的外部网络信息;
或者, 所述的接入点获取所述保存的外部网络信息为: 所述分发***向接入点发送外部网络信息指示消息,消息中承载 相应的外部网络信息。
可选地, 所述请求接入所述的局域网之后, 还包括:
局域网终端在请求本端的无线局域网接口建立无线局域网链路 时,将与网络侧进行协商的与外部网络关联的信息封装到容器信息元 素, 并发送携带有所述容器信息元素的关联请求帧;
网络侧接收所述的关联请求帧后获得所述的容器信息元素 ,解析 所述的容器信息元素;
网络侧将响应结果封装到容器信息元素,并发送携带有所述容器 信息元素的关联响应帧;
局域网终端接收所述的关联响应帧后获得所述的容器信息元素, 解析并处理所述的容器信息元素。
可选地, 所述请求接入所述的局域网之后, 还包括:
在进行服务质量信息、 安全策略信息和 /或路由信息协商时, 网 络侧的接入点向分发***发送承载建立请求消息,消息中携带需要建 立的承载的参数信息;
所述分发***接收所述消息后,根据所述的承载的参数信息建立 相应的承载, 并向接入点返回承载建立响应消息。
根据本发明的另一方面, 一种局域网***, 包括: 终端侧无线局
域网接口, 用于提供终端与无线局域网连接的接口; 网络侧无线局域 网接口; 还包括:
终端侧无线局域网服务装置,用于获取待接入的局域网的网絡互 通信息; 根据所述的网络互通信息确定是否接入该局域网, 并在确定 结果为是时请求接入所述的局域网。
可选地, 该***还包括:
网络侧无线局域网服务装置,用于和所述的终端侧无线局域网服 务装置配合,支持终端与外部网络之间通过所述的终端侧无线局域网 接口和网络侧无线局域网接口进行信息交互。
可选地, 该***还包括: 网络侧外部网络服务单元, 用于提供信 息交互过程中所需的外部网络的相关信息;
网络侧外部网絡信息获取单元,用于与所述的网络侧外部网絡服 务单元交互, 获取所需的相关信息。
可选地, 该***还包括: 终端侧外部网络信息存储装置, 用于存 储终端通过终端侧无线局域网接口接收到的外部网络相关信息; 所述终端侧无线局域网服务装置还包括:终端侧外部网络信息获 取单元, 用于与所述的终端侧外部网络信息存储装置交互, 获取所需 的相关信息。
可选地, 该***还包括互通入口实体, 置于所述网络侧无线局域 网服务装置与外部网络之间,用于实现无线局域网和外部网络信息的 互通。
可选地, 所述的互通入口实体包括:
承载服务单元, 用于建立互通入口实体与无线局域网之间的承 载, 并对所述的承载进行管理。
可选地,所述的网络侧外部网络信息获取单元设置于所述的互通 入口实体或者网络侧无线局域网服务装置。
可选地, 所述终端侧无线局域网服务装置包括: 终端侧信息封装 单元、 终端侧信息传递单元和终端侧信息解析单元;
所述终端侧信息封装单元,用于将要求交互的信息或信息响应封 装到容器信息元素;
所述终端侧信息传递单元,用于将来自所述信息封装单元的容器 信息元素传递给终端侧无线局域网接口;将来自终端侧无线局域网接 口的由网络侧发出的携带容器信息元素的消息传递给终端侧信息解 析单元;
所述终端侧信息解析单元,用于解析和处理来自终端侧信息传递 单元的容器信息元素;
所述网络侧无线局域网服务装置还包括: 网络侧信息封装单元、 网络侧信息传递单元和网络侧信息解析单元;
所述网络侧信息封装单元,用于将网络侧需要发出的信息封装到 容器信息元素;
所述网络侧信息传递单元,用于将来自网络侧信息封装单元的容 器信息元素传递给网絡侧无线局域网接口;将来自网给侧无线局域网 接口的由终端侧发出的携带容器信息元素的消息传递给网络侧信息 解析单元;
所述网络侧信息解析单元,用于解析和处理来自网络侧信息传递 单元的容器信息元素。
才艮据本发明的再一方面, 一种局域网***的终端, 包括: 终端侧 无线局域网接口, 用于提供终端与无线局域网连接的接口; 还包括: 终端侧无线局域网服务装置,用于获取待接入的局域网的网络互 通信息; 根据所述的网络互通信息确定是否接入该局域网, 并在确定 结果为是时请求接入所述的局域网。
根据本发明的又一方面, 一种局域网***的接入点, 包括: 无线 局域网接口; 其特征在于, 还包括: 无线局域网服务装置, 用于向局 域网***的终端发送待接入的局域网的网络互通信息。
可选地, 所述的无线局域网服务装置发送的网络互通信息包括: 网络互通能力信息和 /或外部网络信息。
可选地, 所述的无线局域网服务装置还包括:
网络侧外部网络信息获取单元, 用于与外部网络交互, 获取局域 网***的终端所需的外部网给信息。
本发明中, 局域网终端在尝试接入局域网之前, 从接收到的网络 侧的消息中获悉各局域网的网络互通能力,从而可以确定局域网是否 支持互通要求, 准确地选择一个可以接入的局域网,局域网终端的接 入的成功率可以得到提高, 并可以减少尝试接入所消耗的时间,提高 用户的满意度。
本发明的方法, 除可以应用于 802.11 无线局域网之外, 还可以 应用到其它接入网络, 如 IEEE 802.3有线局域网、 IEEE 802.16无线 城域网等。
另外,本发明还可以使得局域网终端可以获得其他与外部网络互 通相关的其他辅助信息,网络运营过程中便能够支持局域网终端更灵 活的网络选择策略, 以便于终端自由地选择其最希望接入的网络。
此外,网络能力互通信息和外部网络信息由相应网络所支持的管 理帧携带, 或者增加新的管理帧来携带这些信息。从而在状态 1和状 态 2就可以进行相互之间的信息交互,特别有利于基于相应外部网络 信息的快速网络选择,避免了现有技术中由于要在建立链路后才能获 得相应外部网絡信息所导致的网络选择失败及业务时延,终端耗电等 问题。
此外, 本发明在无线局域网***中实现增强的网络发现机制, 在 AP向 STA广播或响应 STA能力发现请求时, AP可获得外部网络信 息, 通过使用外部网络信息服务正确地向 STA传递相应信息。 实现 了 WLAN与外部网络的互通, 并可以满足各种互通的应用场景及端 到端业务需求保障。 本发明的实现使得基于 WLAN的组网更为灵活 和方便, 从而可以满足 WLAN用户与外部网络互通的需求。
此外, 本发明中由于新增加了承载服务, 因此, 改变了 WLAN 只能单纯考虑空口的实现方法, 从而有利于在 WLAN中提供端到端
连接的 QoS、 安全等能力支持。 另外, 本发明的实现还可以保证当对 于一个 VoIP业务, 空中接口能满足业务 QoS需求而 DS不能满足相 应的 QoS要求时, AP为该 VoIP业务申请 DS承载过程将会失败,从 而阻止该 VoIP业务的建立。 反之也一样, 可以保证在一个 VoIP业务 期间维持 DS承载的 QoS保障。
附图说明 图 1是现有技术的 WLAN***的基本结构示意图;
图 2是本发明中获取网络互通信息的原理示意图;
图 3 是本发明的局域网终端接入局域网的方法的实施方式的流 程图;
图 4是图 3所示的获取网络互通能力信息的过程的流程图; 图 5 是本发明的方法中网络互通能力信息交互的实施例的流程 图;
图 6是本发明的方法中网络互通能力信息交互的另一实施例的 流程图;
图 7是本发明的方法中网络互通能力信息交互的另一实施例的 流程图;
图 8是本发明的局域网***的实施例的框图;
图 9是图 8所示***中终端侧和网絡侧进行信息交互的示意图; 图 10是图 8所示***中传递外部网络广播信息的实施例的示意 图;
图 11是图 8所示***中终端通过无线局域网接口查询外部网络 的实施例的示意图;
图 12是图 8所示***中建立无线局域网链路与外部网络相关信 息的绑定关系的实施例的示意图;
图 13是本发明的局域网***的另一实施例的框图;
图 14是图 13所示的***中的互通入口实体的框图;
图 15是图 13所示的***中 AP获取外部网络信息的具体实现过 程的流程图;
图 16是图 13所示的***中建立承载服务通道的实施例的流程 图。
具体实施方式 本发明针对 WLAN作为无线接入网絡所面临的网络选择问题, 提出一种局域网终端接入局域网的方法以及局域网***和装置,使得 STA在选择与目标接入网建立关联之前,通过对网络互通信息的获取 来迅速判断该 WLAN接入网络是否满足其互通要求, 即是否可以提 供相应的能力支持(例如,该 WLAN网络是否能提供 Internet接入服 务或其它互通服务,可以通过什么样的认证方式接入该 WLAN网络, 是否允许本 STA从该 WLAN网络接入, 等等), 以达到 STA省时、 省电, 及网络选择及接入自动化处理的目的。
请参阅图 2, 本发明的实施方式中, AP可以基于广播机制 210 或请求-响应机制 220获取所述网絡互通能力信息 230及相应的外部 网络信息 240, 也可以同时应用两种机制获取相应的信息。
在 WLAN***中, 广播机制 210可以基于被动信道扫描机制即 指通过信标(Beacon ) 帧携带相关信息; 请求-响应机制 220可以基 于主动扫描机制即由探测请求(Probe-request ) 帧携带外部网络信息 请求, 探测响应帧(Probe-Response )携带网络互通能力和 /或外部网 络信息响应。 广播机制及请求-响应机制也可使用操作 ( Action )管理 帧实现。
为了便于对本发明的理解,下面结合实施方式对本发明的局域网 终端接入局域网的方法进行说明。
请参阅图 3 , 是本发明所述的局域网终端接入局域网的方法的流 程图。
步骤 31 , 局域网终端获取待接入的局域网的网络互通信息。 请一并参阅图 4, 获取网络互通信息的过程包括:
步骤 410, 接收网絡侧下发的消息;
步骤 420 , 获取所述消息中携带的网络互通信息。
其中, 所述网络侧下发的消息可以是网络侧主动下发的消息(如
广播消息); 也可以是在网络侧接收到来自终端的请求后下发的消息 (如请求 /响应消息); 或者, 可以包括主动下发的消息和接收到请求 后下发的消息。
步骤 32, 局域网终端才 居获取的网络互通信息确定可以接入的 局域网。
具体实现时,可以根据获取的网絡互通信息以及局域网终端自身 的需求进行接入的局域网的选择。
步骤 33 , 局域网终端请求接入所述确定的局域网。
经过上述处理过程, 局域网终端可以准确地选择接入的局域网, 并能够快速地在漫游地实现网络接入。
请参阅图 5, 是本发明的方法中网络互通信息交互的实施例的流 程图。
步驟 510, AP通过周期性的广播信道(如 802.11 Beacon帧, 或 者操作管理帧)发布 WLAN网络互通信息的消息。
步骤 520, STA在扫描期间获得广播发布的 WLAN网络互通信 所述网络互通信息包括网络互通能力信息、或者网络互通能力信 息和外部网络信息。
请参阅图 6, 是本发明的方法中网络互通信息交互的另一实施例 的流程图。
步驟 610 , STA发起网络互通信息发现请求消息,例如,发送 Probe Request消息。
步骤 620, AP在响应该网络互通信息发现请求消息的网络互通 信息发现响应消息, 例如, 响应 Probe Request消息的 Probe Response 消息中, 携带 WLAN网络互通信息。
所述网絡互通信息包括网络互通能力信息、 外部网络信息、或者 网络互通能力信息和外部网絡信息。
请参阅图 7, 是本发明的方法中网络互通信息交互的又一实施例 的流程图。
步骤 710, AP通过周期性的广播信道(如 802.11 Beacon帧)发 布基本的 WLAN网络互通能力信息的消息。
所述的基本的 WLAN网络互通能力信息包括三部分内容: ( 1 ) WLAN网络所有者标识信息 (Network Owner Identifier ); ( 2 )网络互通基本能力信息 ( Network Interworking Capability );
( 3 ) 支持的在线注册方法信息 (Online Enrollment Methods;)。 具体如表 2所示:
WLA 网络所有者标识用于说明该 WLAN网络属于谁, 如机场的 WLAN网络所有者可能是机场或某个本地运营商, 酒店的 WLAN 网络其所有者可能是酒店或某个本地运营商, 某个小区的 WLAN 网络拥有者可能属于物业管理部门, 等等。 目前在一些实际 应用中, 也有采用 SSID来标识网络所有者的, 由于 SSID有其特定 的语义, 因此, 广播的 WLAN互通能力信息增加新的区分 WLAN网 络所有者的字段。 STA通过 WLAN网络拥有者标识, 可以判断该网 络是否属于其归属网络(Home Network )。
网络互通基本能力信息用于说明基本的概要性质的互通能力说 明, 可通过约定不同比特位的特定含义来表示响应的网络互通能力, 具体包括:
拜访者用户接入 ( Visited User Access ) (例如 1 bit ), 用于标识该 网络是否与其他业务提供商有漫游关系, 并支持拜访者接入外部网 络, 如置位为 1表示支持, 为 0表示不支持; 对于一个不支持拜访者 用户接入的网络, STA只能选择由该网络本地所提供的在线接入方法 接入网络。
紧急呼叫(例如 1 bit ), 用于说明该网络是否支持紧急呼叫业务, 如置位为 1表示支持紧急呼叫, 为 0表示不支持; 支持紧急呼叫的网 络具备与紧急呼叫中心互通的能力,以及具备向紧急呼叫中心提供呼
叫终端位置信息的能力。 紧急呼叫业务一般要求免费提供。
MIH (例如 l bit ), 用于说明该网络是否支持 MIH标准, 即能支 持终端跨不同接入媒体的切换, 如置位为 1表示支持, 为 0表示不支 持。 对于一个支持 MIH的多模终端来说, 要求在 WLAN网络与其它 网络之间的进行切换, 因此也要求相应的 WLAN网络具备 MIH标准 支持能力。
支持的在线注册方法信息表示该网络所支持的在线注册方法,例 如, 是否支持 UAM ( Universal Access Method, —种基于浏览器劫持 的接入认证方法)。 STA可选择网络所支持的在线注册方法接入网 络。
因此, STA可以获知两方面信息: 该网络是否属于其归属网络; 若该网络不属于其归属网络,能够知道该网络具体的网络互通能力以 及所支持的在线注册方法。
假设 STA的归属网络为 A, 当该网络不属于 A时, STA需求知 道该 WLAN网络是否支持其接入并获得相关服务, 这时就进入步骤 720进行交互, 从而获取具体的网络互通能力信息。
需要说明的是: STA在选择进入步骤 720之前, 同时还应综合考 虑网络的其他能力信息, 如安全能力信息、 QoS能力信息等, 以判断 该网络是否能满足相应的业务的需求;所述的网络的其他能力信息可 以通过主动扫描或被动扫描获得。
步骤 720, STA给 AP发送网络互通信息发现请求消息, 消息中 携带着 STA接入 WLAN网络需要获取的具体的网络互通能力信息的 请求。
网络互通信息发现请求中承载的信息用来询问 AP与其归属网络 是否有漫游关系, 以及是否支持相应的互通业务需求。 考虑到一个 STA可能装载有多个归属网络的客户端程序 ,通过该信息可同时询问 AP对多个归属网络的支持能力。
所述的网络互通信息发现请求中承载的信息的内容如表 3所示:
归属网络数 归属网络信息 归属网络信息
( N ) (第 1个归属网络) (第 N个归属网絡)
其中归属网络信息的内容包括: 归属网络标识 (Home Network Identifier, HNI ); 互通业务类型 ( Interworking Type )„
所述的互通业务类型为描述 STA 期望支持的外部网络类型及
WLAN与外部网络的互通方式。 具体可能的互通业务类型包括: Intranet接入 ·,
Internet接入;
3GPP-场景 2;
3GPP-场景 3;
3GPP2;
UMA (非授权频段移动接入, 一种 WLAN/Bluetooth 与 GSM/GPRS的互通方法)
等等。
在 802.11 WLAN网络, 所述的信息可以由 Probe Request管理帧 携带, 或者由 Action管理帧携带。
步骤 730, AP给 STA响应网络互通信息发现响应消息, 消息携 带着根据其请求确定的相应的网络互通能力信息, 其中包含 STA请 求发现的网络互通能力。
AP收到 STA的信息后,需要确定与 STA的归属网络是否存在漫 游关系。 网络互通能力信息响应消息中承载的信息的内容如表 4所 示:
其中, 针对每个归属网络的归属网络发现结果, 主要包括:
( 1 ) 归属网络标识(Home Network Identifier, HNI );
( 2 )结果(Result ), 主要标识成功或者失败原因, 成功则表示 局域网终端的该归属网络与这一 AP之间可以漫游互通, 失败则表示 两网之间不能漫游互通;
( 3 ) 附加的归属网络信息, 当归属网络发现结果为成功时, 则 可进一步携带该网絡的附加的归属网络信息, 例如:
计费政策: 例如漫游费的计算;
MIH相关信息: 当支持 MIH时, 网络侧 MIH相关信息; 等等。
( 4 ) 互通业务类型 ( Interworking Service Requirements );
所述的互通业务类型为:
描述 STA期望支持的外部网絡类型及 WLAN与外部网络的互通 方式。 具体可能的互通业务类型包括:
Intranet接入;
Internet接入;
3GPP-场景 2;
3GPP-场景 3;
3GPP2;
UMA (非授权频段移动接入, 一种 WLAN/Bluetooth 与 GSM/GPRS的互通方法)
等等。
所述的信息可以通过 Probe Response管理帧携带,或者也可以由 Action管理帧携带。
本实施例中, 分为两个步骤获取网络互通能力信息的目的是: 对 于基本的概要性质的网络互通能力信息可以首先通过步驟 710获得, 进一步的更具体 STA密切相关的外部网络信息可以通过之后的步驟 720和 730获得。
在实际应用过程中, 当采用步骤 710、 720和 730获取网络互通 信息时,则 STA在扫描广播消息期间,首先判断该网络能否满足 STA
接入的基本需求,在满足基本需求的基 上再进行步骤 720和 730的 交互, 以发现该 STA接入所要求的网络互通能力均可以支持。
针对所述的基本的 WLAN网络互通能力信息、 网络互通信息发 现请求中承载的信息、 网络互通信息发现响应消息中承载的信息, 在 传递过程中根据需要还可以提供相应的保护或安全机制。
本发明提供的网络互通信息发现的机制除可以应用于 802.11 无 线局域网之外,还可以应用到其它接入网络,如 IEEE 802.3有线局域 网、 IEEE 802.16无线城域网等。 当应用到其他网络时, 上述 3种信 息由相应网络所支持的管理帧携带,或者增加新的管理帧以携带这些 信息。 如在 802.3网络, 需要增加新的以太网协议类型区别其他数据 报文, 以支持这些信息的传递。
由于本发明在接入之前进行了可以接入的 WLAN的选择工作, 因此, 可以大大提高接入的成功率, 避免多次尝试接入, 节省了局域 网终端漫游接入 WLAN需要的时间。
综上所述,本发明提供的网络互通信息发现机制使得 STA (局域 网终端)在尝试接入 WLAN之前, 便可以确定该 WLAN是否支持 STA的互通要求, 从而可以更准确地选择一个可以接入的 WLAN, 这样,局域网终端的接入的成功率可以大大提高, 并可以減少尝试接 入所消耗的时间, 提高用户的满意度。
另夕卜,本发明还可以使得局域网终端可以获得其他与外部网络互 通相关的其他辅助信息如计费政策等, 这样, 网络运营过程中便能够 支持 STA更灵活的网络选择策略, 以便于 STA自由地选择其最希望 接入的网络。
请参阅图 8, 本发明的局域网***的实施例中, 终端侧包括: 终 端侧无线局域网接口 81、 终端侧无线局域网服务装置 82。 终端侧无 线局域网接口 81提供终端与无线局域网连接的接口。
网络侧包括: 网络侧无线局域网接口 91、 网络侧无线局域网服 务装置 92。
终端侧无线局域网服务装置 82和网络侧无线局域网服务装置 92
支持终端与外部网絡之间通过所述的终端侧无线局域网接口 81和网 络侧无线局域网接口 91进行信息交互。
其中, 终端侧无线局域网服务装置 82获取待接入的局域网的网 络互通信息; 才艮据所述的网络互通信息确定是否接入该局域网, 并在 确定结果为是时请求接入所述的局域网。终端侧无线局域网服务装置 82包括: 终端侧信息封装单元 821、终端侧信息传递单元 822和终端 侧信息解析单元 823以及终端侧外部网络信息获取单元 824。
终端侧信息封装单元 821 用于将终端侧需要发出的信息封装到 答器信息元素 ( Container-IE , Container Information Element )。
终端侧信息传递单元 822用于将来自终端侧信息封装单元 821的
Container-IE传递给本端的无线局域网接口; 将终端侧无线局域网接 口 81输入的来自网络侧的携带 Container-IE的消息传递给终端侧信 息解析单元 8230
所述的 Container-IE可以由目前 802.11已定义的各种管理帧及将 来可能新增加的各种管理帧携带,用于传递终端与外部网络相关的信 息。
终端侧信息解析单元 823用于解析来自终端侧信息传递单元 822 的 Container-IE, 并对之作进一步的处理。
所述终端侧还包括终端侧外部网络信息存储装置 83 , 用于存储 终端通过终端侧无线局域网接口 81接收到的外部网络相关信息。 终 端读取预设的相应信息与接收到的外部网络信息比较, 或将相关信 息封装到无线局域网接口相应管理帧以传递到网络侧。
终端侧外部网络信息获取单元 824 用于与终端侧外部网络信息 存储装置 82交互, 获取所需的相关信息。
其中, 网络侧无线局域网服务装置 92包括: 网络侧信息封装单 元 921、 网络侧信息传递单元 922和网络侧信息解析单元 923以及网 络侧外部网絡信息获取单元 924。
网络侧信息封装单元 921 用于将网络侧需要发出的信息封装到 答器信息元素 ( Container- IE , Container Information Element )。
网絡侧信息传递单元 922用于将来自网络侧信息封装单元 921的 Container-IE传递给本端的无线局域网接口; 将网络侧无线局域网接 口 91输入的来自终端侧的携带 Container-IE的消息传递给网络侧信 息解析单元 923。
网络侧信息解析单元 923用于解析来自网络侧信息传递单元 922 的 Container- IE, 并对之作进一步的处理。
网络侧还包括网络侧外部网络服务单元 93 , 用于提供信息交互 过程中所需的外部网络的相关信息。所述的网络侧的外部网络服务单 元是指外部网络的一些实体, 如相应外部网络的鉴权服务器, 网关 等。
网络侧外部网络信息获取单元 924 用于与网络侧外部网络信息 服务单元 93交互, 获取所需的相关信息。
参照图 9 , 基于上述实施方式的***, 终端侧和网络侧按照下述 步骤进行信息交互。
S1、信息请求端的无线局域网服务装置将要求交互的信息封装到
Container-IE传递给本端的无线局域网接口。
52、信息请求端的无线局域网接口发送根据请求类型而选择的管 理帧, 该管理帧携带有所述的 Container-IE;
管理帧所携带的信息包括两大类: 一类为固定的域 (Fields that are not Information Elements),固定出现在具体管理帧结构的特定位置 上, 以表征特定的含义; 另一类称为信息元素 (Information Elements), 信息元素采用一种通用的编码结构: 首字节为信息元素标识, 第 2个 字节为长度, 紧跟长度后面的是所述长度的信息内容。 不同的信息元 素对应不同的信息元素标识 (Element ID)。 Container-IE是本发明实施 方式中采用的一种新的信息元素。
当然, 本发明中所述的信息也可以以其他方式由管理帧携带。
53、信息接收端的无线局域网接口接收所述的管理帧后获取所述 的 Container-IE, 并传递给本端的无线局域网服务装置。
54、 信息接收端的无线局域网服务装置解析并处理所述的
Container-IE„
下面介绍利用本发明所述信息交互方法进行信息交互的三个实 施例。
实施例一、 图 10示出一个传递外部网络广播信息的实施例。 其 具体流程如下:
S 11、 网络侧无线局域网服务装置以终端能理解的方式对广播的 消息进行封装, 并进一步封装到 Container-IE, 然后将该 Container-IE 传递给网络侧无线局域网接口, 请求广播。
512、 网络侧无线局域网接口在发送广播帧 Beacon或者 Action 时,其中携带相应的 Container-IE。
513、 当终端正在监听相应无线信道时,将能接收到 Beacon或者 Action 并获得 Container-IE, 终端侧无线局域网接口将接收到的广播 信息 Container-IE传递到终端侧无线局域网服务装置。
514、终端侧无线局域网服务装置解析所述的 Container-IE, 并作 进一步的处理。 例如分析 Container-IE 的内容以确定是否将通过该 无线局域网接口接入相应外部网络。
实施例二、 图 11示出一个终端通过无线局域网接口查询外部网 络的实施例。 其具体流程如下:
S21、 终端侧无线局域网服务装置将查询条件以对端能理解的方 式 (例如都遵循同一种协议及版本) 进行封装, 并进一步封装到 Container-IE , 然后将该 Container- IE传递给终端侧无线局域网接口, 请求查询。
S22、 终端侧无线局域网接口发送探测请求帧, 其中携带包含外 部网络查询条件的 Container-IE。
S23、 网络侧无线局域网接口收到探测请求帧后获得
Container-IE , 将其传送给网絡侧无线局域网服务装置。
S24、 网络侧无线局域网服务装置解析该 Container-IE所包含的 查詢条件, 根据需求进一步与网络侧外部网络服务单元交互,获得相 应的查询结果,将形成的查询结果以终端能理解的方式封装并进一步
封装为 Container-IE, 作为查询结果传递给网络侧无线局域网接口。
525、 网络侧无线局域网接口向终端侧发送探测响应帧 Probe response, 其中携带包含有外部网络信息查询结果的 Container-IE。
526、终端侧无线局域网接口收到所述的 Probe response后,将其 中的 Container-IE作为查询结果传递给终端侧无线局域网服务装置。
527、 终端侧无线局域网服务装置解析所述的 Container-IE 中的 查询结果, 以确定进一步的处理, 例如终端基于查询所获得的信息如 漫游关系、 业务能力等确定是否接入该无线局域网。
实施例三、 图 12示出一个建立无线局域网链路与外部网络相关 信息的绑定关系的实施例。当进行无线局域网链路建立或关联协商时, 也可以在相应的管理帧中携带 Container-IE进行相应外部网络参数协 商。 更进一步, 还可以基于 Container-IE的内容确定无线局域网链路 的一些参数, 例如服务集标识 SSID等, 由于这些参数是基于外部网 络的相应信息生成或存在一定的对应关系,因此可用于当终端在同一 个局域网的不同信道之间切换时作为网络选择的一个条件。其具体流 程如下:
S31、 终端侧无线局域网服务装置在请求本端的无线局域网接口 建立无线局域网链路时, 可传递 Container-IE, 其中包括了与对端进 行协商的与外部网络关联的信息。
S32、 终端侧无线局域网接口发送关联请求, 携带相应的
Container-IE o
533、 网络侧无线局域网接口收到关联响应后, 传递该 Container-IE到本端的无线局域网服务装置。
534、 网絡侧无线局域网服务装置解析 Container-IE 的内容, 如 其中也许包含有请求的业务类别及接入认证方法等,并根据本端能力 形成相应的响应内容, 以对端能理解的方式封装, 并进一步封装到 Container-IE , 传递给本端的无线局域网接口。 网络侧无线局域网服 务装置还可以在反馈响应的 Contain-IE 到本端的无线局域网接口的 同时, 指定相应的待建立链路的绑定参数例如 SSID等。
535、 网络侧无线局域网接口回应对端关联响应, 其中携带了本 端响应的 Container-IE。
536、 终端侧无线局域网接口收到对端关联响应后, 将其中的 Container-IE作为链路建立响应传送给本端的无线局域网服务装置。
S37、 终端侧无线局域网服务装置解折并处理所述的
Container-IE。
本发明的实施方式中, 要求 DS能莰得相关外部网络信息以满足 STA的互通能力发现要求, 这些信息可以直接配置在 AP上, 或者将 外部网络信息服务作为 DS的功能, AP通过 DS所提供的外部网络信 息服务而获得相应的外部网絡信息。
请参阅图 13 , 本发明的***的另一实施例中, 包括无线局域网 910、 外部网络 920和互通入口实体(Entrance ) 930, 所述的互通入 口实体 930设置于无线局域网 910与外部网络 920之间,用于实现两 网信息的互通。
请一并参阅图 14, 所述***中还包括外部网络信息获取单元
940, 用于获取与互通入口实体 930相连的外部网络 920的外部网络 信息, 并将所述的外部网络信息提供给无线局域网 910 中的接入点 ( AP ) 911。 所述的外部网络信息获取单元 940设置于互通入口实体 930内或独立于该互通入口实体 930设置, 所述的外部网络信息包括 归属网络标识信息、 附加的归属网络信息和 /或互通业务类型信息, 等等。
所述的互通入口实体 930还包括相应的承载服务单元 931 , 用于 建立互通入口实体 920与无线局域网 AP 911之间的 载, 并对所述 的承载进行管理, 基于该承载可以在互通入口实体 930与 AP 911之 间进行信息的交互, 进而实现接入终端与外部网络之间的信息的交 互。
其中, 所述的互通入口实体 930是分发***(DS ) 912与外部网 络 920之间连接的一个逻辑实体,所述的逻辑实体可以设置于独立的 物理实体上, 也可以设置于已经存在的物理实体, 即所述互通入口实
体 930是 WLAN 910与外部网络 920互通接口的逻辑参考点。
在 DS 912进行 MSDU分发 ( distribution )时,来往外部网络 920 的数据包均经过互通入口实体 930。 例如, STA发送数据包到外部网 络 920, DS 912转发时接收地址填互通入口实体 930的地址。 外部网 络 920到 STA的数据包, 发送地址为互通入口实体、 接收地址为对 应 AP的地址, 之后 AP再传递给 STA。
WLA 可通过不同的互通入口实体与不同的外部网络互通, 或 通过同一个互通入口实体与不同的外部网络互通。
对于支持互通的 WLAN网络架构, 所有业务转发都必经互通入 口实体, 所以该点同时也可以作为计费信息的重要采集点之一。
在 WLAN***运行之前, AP需要知道网络中的各个互通入口实 体信息, 以及其对应每个互通入口实体连接的外部网络的特征信息, 即外部网络信息, 例如, 所连接的外部网络标识、 支持的互通的外部 网络类型, 具体如 3GPP场景 2、 3GPP场景 3、 UMA (非授权频段 移动接入)、 IMS (因特网多媒体子网 )、 ISP (服务提供者)、 Intranet 或 Internet信息, 等等。 这些信息称之外部网络信息, 互通入口实体 需要知道其相关联的外部网络信息,互通入口实体具体可以在自身设 置相应的信息, 或者互通入口实体也可以通过访问外部获得该信息。
当隶属于某个特定业务提供商的用户要求通过本 WLAN接入相 应的外部网珞而获得相应互通业务时, AP必须知道相应的外部网络 信息, 包括为该用户提供所要求的外部网络信息服务, 以及接入控制 等信息。
因此, 需要在 AP与 DS之间提供一种新的服务, 即外部网络信 息服务, 从而使得 AP能获得所述的外部网络信息。 外部网络信息服 务是新增加的一种 DS逻辑服务功能, 具体可以通过设置相应的外部 网絡信息服务单元实现。
如图 15所示, AP获取外部网络信息的具体实现过程包括: 主动 方式和被动方式两种, 其中:
所述的被动方式如步骤 41所示, 具体为:
DS中的外部网络信息获取单元直接将外部网络信息推送到 AP, 即通过 External-network-information.indication (夕卜部网络信息指示 ) 消息携带相应的外部网络信息发送给 AP。
所述的主动方式如步骤 42和步骤 43所示, 具体包括: 步骤 42 , AP 向 DS 中的外部网络信息获取单元发起
External-network-information.request (夕卜 ·Ι 网络信息请求 );
步骤 43 , DS 中的外部网络信息获取单元向 ΑΡ 返回 External-network-information.indication消息 , 消息中携带所请求的夕卜 部网络信息。
通过上述主动方式可请求获得所有 Entrance 关联的外部网络信 息或指定的 Entrance的关联信息, Entrance可用 MAC地址标识, 也 以可请求查询某个网络运营商与这些外部网络之间是否存在漫游关 系等各种特定信息。
AP获得相应的外部网络信息后, 便可以通过其与互通入口实体 之间建立的承载服务(Bearer Service )实现接入终端与外部网络之间 的信息的交互, 从而实现 WLAN与外部网络之间的互通。
在进行 STA接入认证时, 该 STA对应的鉴权服务器传递到对应 AP的授权数据可能包含针对 QoS、 安全策略、 路由等方面的控制信 息, AP必须根据这些信息分别在空中接口(AP与接入终端之间的接 口)及 DS接口 (即 AP与互通入口实体之间的接口)上实施。
如图 16所示, 相应的处理具体包括:
步骤 51, AP向互通入口实体发送 Bearer.request (承载请求)消 息, 该消息可以用于 AP请求建立新的承载、 改变现有承载的参数及 删除某承载等。
步驟 52, DS中的互通入口实体接收到所述的请求消息后, 进行 相应的处理并返回 Bearei'.response (承载响应) 消息, 消息中包括所 述请求消息是否成功执行或失败, 以及执行成功时, 相应的承载的具 体参数。
在承载建立之后,根据需要还可以执行步骤 53 , 即由 DS中的互
通入口实体向 AP发送 Bearer.indication (承载指示)消息, 该消息用 于向用户报告承载的使用状况, 如丟包率等; 每个承载拥有一个标识 Bearer ID, 可由 AP发送 Bearer.request请求创建承载时创建, 或由 DS成功创建承载回 Bearer.response时创建, 通过不同的 Bearer ID可 以在消息中区别不同的承载。
在 DS具体实施时, Bearer ID可以具体映射到底层传输技术的具 体端口号或地址上去,以便于基于该承载在接入终端与外部网络之间 进行信息的交互。例如,假设 DS基于以太网,则可以提供 VLAN (虚 拟局域网)服务, Bearer ID可映射到一个 VLAN端口; 如 DS基于 EP网络, Bearer ID可映射到某个 VPN (虚拟专网)或 PPP (点对点), 或者 ATM (异步传输模式) 网络的某个 PVC (永久虛通路)等等。
对于一个用户, 根据授权信息, 当要支持多个并发业务流时, 可 以创建多个承载, 并以不同的 Bearer ID标识各个承载。
可以看出,本发明中由于新增加了承载服务,因此,改变了 WLAN 只能单纯考虑空口的实现方法, 从而有利于在 WLAN中提供端到端 连接的 QoS、 安全等能力支持。
本发明的实现可以在 WLAN***中增强的网络发现机制, 具体 为 AP向 STA广播或响应 STA能力发现请求时, AP可通过使用外部 网络信息服务正确地向 STA传递相应信息。
另外, 本发明的实现还可以保证当对于一个 VoIP业务, 空中接 口能满足业务 QoS需求而 DS不能满足相应的 QoS要求时, Ap为该 VoIP业务申请 DS承载过程将会失败,从而阻止该 VoIP业务的建立。 反之也一样, 可以保证在一个 VoIP业务期间维持 DS承载的 QoS保 障。
本实施例提供了支持 WLAN与外部网络互通的 WLAN内部网络 架构, 满足各种互通应用场景及端到端业务需求保障的需要,从而使 得 WLAN网络中的用户可以方便地与外部网絡互通, 开展相应的业 务。
本发明使得一个要求与外部网络互通的 STA在选择 WLAN网络
之前, 可以获知该网络是否具备互通能力及具备什么样的互通能力, 以及相应的外部网络信息。 STA根据上述信息以确定该 WLAN是否 支持其互通要求。 所述互通要求包括网絡接受 STA归属网络的接入 认证及相应的互通类型 (如 internet接入、 与 3GPP互通等), 或者 STA可选择网络所提供的在线注册方法接入网络。
此外, 当 STA是一个支持 MIH (媒体独立的切换 ) 的多模终端 时, 所述外部网络必须同时也具备 MIH能力才可以支持 MIH功能。 同时上述外部网络信息也应该包括外部网络 MIH相关信息以帮助 STA进行跨不同接入媒体的网络选择。
以上所述, 仅为本发明较佳的具体实施方式, 但本发明的保护范 围并不局限于此,任何熟悉本技术领域的技术人员在本发明揭露的技 术范围内, 可轻易想到的变化或替换, 都应涵盖在本发明的保护范围 之内。 因此, 本发明的保护范围应该以权利要求的保护范围为准。
Claims
1、 一种局域网终端接入局域网的方法, 其特征在于, 包括: 局域网终端获取待接入的局域网的网络互通信息;
根据所述的网络互通信息确定是否接入该局域网,并在确定为是 时请求接入所述的局域网。
2、 根据权利要求 1所述的局域网终端接入局域网的方法, 其特 征在于, 所述局域网终端获取待接入的局域网的网络互通信息具体 为:
网络侧发送广播消息, 广播其网络互通能力信息、或网络互通能 力信息和外部网络信息;
所述局域网终端接收所述的广播消息, 获取网络互通能力信息、 或网络互通能力信息和外部网絡信息。
3、 根据权利要求 2所述的局域网终端接入局域网的方法, 其特 征在于, 所述网络侧发送广播消息为: 网络侧发送管理帧, 其中携带 网络互通能力信息、 或网络互通能力信息和外部网络信息。
4、 根据权利要求 3所述的局域网终端接入局域网的方法, 其特 征在于, 所述管理帧为信标管理帧或操作管理帧。
5、 根据权利要求 3所述的局域网终端接入局域网的方法, 其特 征在于, 所述局域网终端获取待接入的局域网的网络互通信息具体 为:
网络侧将网络互通信息封装到容器信息元素 ,并发送携带有所述 容器信息元素的管理帧;
终端接收所述的管理帧后获得所述的容器信息元素,解析并处理 所述的容器信息元素。
6、 根据权利要求 1所述的局域网终端接入局域网的方法, 其特 征在于 , 所述局域网终端获取待接入的局域网的网络互通信息具体
为:
局域网终端向网络侧发送网絡互通信息发现请求消息; 网络侧将外部网络信息、 网络互通能力信息、或者网络互通能力 信息和外部网络信息通过网络互通信息发现响应消息发送给局域网 终端;
局域网终端获取相应的信息。
7、 根据权利要求 1所述的局域网终端接入局域网的方法, 其特 征在于, 局域网终端获取待接入的局域网的网络互通信息具体为: 网络侧发送广播消息, 广播其基本网络互通能力信息; 所述局域网终端接收所述的广播消息,获取基本网络互通能力信 白 · 局域网终端向网络侧发送网络互通信息发现请求消息; 网络侧通过网络互通信息发现响应消息将具体网络互通能力信 息、 外部网络信息、或者具体网络互通能力信息和外部网络信息发送 给局域网终端;
局域网终端获取相应的信息。
8、 根据权利要求 2至 7任一项所述的局域网终端接入局域网的 方法, 其特征在于, 所述的网络互通能力信息包括: 局域网网络所有 者标识信息、 网络互通基本能力信息和 /或支持的在线注册方法信息; 所述的外部网络信息包括: 归属网络标识信息、 附加的归属网络信息 和 /或互通业务类型信息。
9、 根据权利要求 8所述的局域网终端接入局域网的方法, 其特 征在于, 所述的网络互通基本能力信息包括: 是否支持拜访者用户接 入的指示信息、 是否支持紧急呼叫和 /或是否支持媒体独立的切换的 指示信息。
10、 根据权利要求 6或 7所述的局域网终端接入局域网的方法, 其特征在于, 所述的局域网包括有线局域网和无线局域网; 且在无线 局域网中,所述的网络互通信息发现请求消息通过探测请求管理帧或
操作管理帧携带,所述的网絡互通信息发现响应消息通过探测响应管 理帧或操作管理帧携带;所述的外部网絡信息封装为管理帧中的容器 信息元素。
11、根据权利要求 1所述的局域网终端接入局域网的方法, 其特 征在于, 在所述局域网终端获取待接入的局域网的网络互通信息之 前 还包括二
无线局域网的接入点通过无线局域网中的分发***获取与该无 线局域网互通的外部网络的外部网絡信息。
12、 根据权利要求 11所述的局域网终端接入局域网的方法, 其 特征在于,所述的无线局域网的接入点通过无线局域网中的分发*** 获取与该无线局域网互通的外部网络的外部网络信息为:
所述接入点向分发***发送外部网络信息请求报文;
所述分发***向接入点返回外部网络信息响应报文,报文中携带 相应的外部网络信息;
或者, 所述的接入点获取所述保存的外部网络信息为: 所述分发***向接入点发送外部网络信息指示消息,消息中承载 相应的外部网絡信息。
13、根据权利要求 1所述的局域网终端接入局域网的方法, 其特 征在于, 所述请求接入所述的局域网之后, 还包括:
局域网终端在请求本端的无线局域网接口建立无线局域网链路 时,将与网络侧进行协商的与外部网络关联的信息封装到容器信息元 素, 并发送携带有所述容器信息元素的关联请求帧;
网络侧接收所述的关联请求帧后获得所述的容器信息元素,解析 所述的容器信息元素;
网络侧将响应结果封装到容器信息元素,并发送携带有所述容器 信息元素的关联响应帧;
局域网终端接收所述的关联响应帧后获得所述的容器信息元素, 解析并处理所述的容器信息元素。
14、根据权利要求 1所述的局域网终端接入局域网的方法, 其特 征在于, 所述请求接入所述的局域网之后 , 还包括:
在进行服务质量信息、 安全策略信息和 /或路由信息协商时, 网 络侧的接入点向分发***发送承载建立请求消息,消息中携带需要建 立的承载的参数信息;
所述分发***接收所述消息后,根据所述的承载的参数信息建立 相应的承载, 并向接入点返回承载建立响应消息。
15、 一种局域网***, 包括: 终端侧无线局域网接口, 用于提供 终端与无线局域网连接的接口;网絡侧无线局域网接口;其特征在于, 还包括:
终端侧无线局域网服务装置,用于获取待接入的局域网的网络互 通信息; 根据所述的网絡互通信息确定是否接入该局域网, 并在确定 结果为是时请求接入所述的局域网。
16、 根据权利要求 15所述的局域网***, 其特征在于, 还包括: 网络侧无线局域网服务装置,用于和所述的终端侧无线局域网服 务装置配合,支持终端与外部网络之间通过所述的终端侧无线局域网 接口和网络侧无线局域网接口进行信息交互。
17、根据权利要求 16所述的局域网***, 其特征在于, 还包括: 网络侧外部网络服务单元 ,用于提供信息交互过程中所需的外部网络 的相关信息;
网络侧外部网络信息获取单元 ,用于与所述的网络侧外部网络服 务单元交互, 获取所需的相关信息。
18、 根据权利要求 17所述的局域网***, 其特征在于, 还包括: 终端侧外部网絡信息存储装置,用于存储终端通过终端侧无线局域网 接口接收到的外部网络相关信息;
所述终端侧无线局域网服务装置还包括:终端侧外部网络信息获 取单元, 用于与所述的终端侧外部网络信息存储装置交互, 获取所需 的相关信息。
19、 根据权利要求 18所述的局域网***, 其特征在于, 还包括 互通入口实体, 置于所述网络侧无线局域网服务装置与外部网络之 间, 用于实现无线局域网和外部网络信息的互通。
20、 根据权利要求 19所述的局域网***, 其特征在于, 所述的 互通入口实体包括:
承载服务单元, 用于建立互通入口实体与无线局域网之间的承 载, 并对所述的承载进行管理。
21、 根据权利要求 18所述的局域网***, 其特征在于, 所述的 网络侧外部网络信息获取单元设置于所述的互通入口实体或者网络 侧无线局域网服务装置。
22、根据权利要求 16至 21任一项所述的局域网***, 其特征在 于, 所述终端侧无线局域网服务装置包括: 终端侧信息封装单元、 终 端侧信息传递单元和终端侧信息解析单元;
所述终端侧信息封装单元,用于将要求交互的信息或信息响应封 装到容器信息元素;
所述终端侧信息传递单元,用于将来自所述信息封装单元的容器 信息元素传递给终端侧无线局域网接口;将来自终端侧无线局域网接 口的由网络侧发出的携带容器信息元素的消息传递给终端侧信息解 析单元;
所述终端侧信息解析单元,用于解析和处理来自终端侧信息传递 单元的容器信息元素;
所述网络侧无线局域网服务装置还包括: 网络侧信息封装单元、 网络侧信息传递单元和网络侧信息解析单元;
所述网络侧信息封装单元,用于将网络侧需要发出的信息封装到 容器信息元素;
所述网络侧信息传递单元,用于将来自网络侧信息封装单元的容 器信息元素传递给网络侧无线局域网接口;将来自网络侧无线局域网 接口的由终端侧发出的携带容器信息元素的消息传递给网络侧信息
解析单元;
所述网络侧信息解析单元,用于解析和处理来自网络侧信息传递 单元的容器信息元素。
23、 一种局域网***的终端, 包括: 终端侧无线局域网接口, 用 于提供终端与无线局域网连接的接口; 其特征在于, 还包括:
终端侧无线局域网服务装置,用于获取待接入的局域网的网络互 通信息; 才艮据所述的网络互通信息确定是否接入该局域网, 并在确定 结果为是时请求接入所述的局域网。
24、 一种局域网***的接入点, 其特征在于, 包括: 无线局域网 接口; 其特征在于, 还包括: 无线局域网服务装置, 用于向局域网系 统的终端发送待接入的局域网的网络互通信息。
25、 居权利要求 24所述的接入点, 其特征在于, 所述的无线 局域网服务装置发送的网络互通信息包括: 网络互通能力信息和 /或 外部网络信息。
26、 根据权利要求 25所述的接入点, 其特征在于, 所述的无线 局域网服务装置还包括:
网络侧外部网络信息获取单元, 用于与外部网络交互, 获取局域 网***的终端所需的外部网络信息。
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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*** |
CN200510093053.3 | 2005-08-25 | ||
CN200510093054.8 | 2005-08-25 | ||
CNB2005100930533A CN100446492C (zh) | 2005-08-25 | 2005-08-25 | 局域网终端接入局域网的方法 |
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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