WO2004114588A1 - Method for transmitting traffic data to wireless local area network users - Google Patents

Method for transmitting traffic data to wireless local area network users Download PDF

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Publication number
WO2004114588A1
WO2004114588A1 PCT/CN2004/000690 CN2004000690W WO2004114588A1 WO 2004114588 A1 WO2004114588 A1 WO 2004114588A1 CN 2004000690 W CN2004000690 W CN 2004000690W WO 2004114588 A1 WO2004114588 A1 WO 2004114588A1
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WO
WIPO (PCT)
Prior art keywords
service
user terminal
notification
wlan
network
Prior art date
Application number
PCT/CN2004/000690
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English (en)
French (fr)
Other versions
WO2004114588A8 (fr
Inventor
Wenlin Zhang
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
Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Priority to DE602004027487T priority Critical patent/DE602004027487D1/de
Priority to AU2004250733A priority patent/AU2004250733B2/en
Priority to AT04738288T priority patent/ATE470291T1/de
Priority to EP04738288A priority patent/EP1638247B1/en
Priority to CA002523404A priority patent/CA2523404A1/en
Publication of WO2004114588A1 publication Critical patent/WO2004114588A1/zh
Publication of WO2004114588A8 publication Critical patent/WO2004114588A8/zh
Priority to US11/261,802 priority patent/US20060109827A1/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/12—Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/04—Protocols specially adapted for terminals or networks with limited capabilities; specially adapted for terminal portability
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/40—Network security protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/30—Definitions, standards or architectural aspects of layered protocol stacks
    • H04L69/32—Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level
    • H04L69/322—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions
    • H04L69/329—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions in the application layer [OSI layer 7]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/18—Selecting a network or a communication service
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
    • H04W68/12—Inter-network notification
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/02—Inter-networking arrangements

Definitions

  • the present invention relates to service access technology in a wireless local area network, and particularly to a method for sending service data to a wireless local area network user. Background of the invention
  • Wireless local area network includes a variety of different technologies.
  • IEEE 802.11b which uses the 2.4GHz frequency band and has a maximum data transmission rate of 11Mbps.
  • IEEE 802.11g and Bluetooth technology are also used in this frequency band. Among them, the maximum data transmission rate of 802.1 lg can reach 54Mbps.
  • WLANs are used to transmit Internet Protocol (IP) packet data packets.
  • IP Internet Protocol
  • the specific WLAN access technology it uses is generally transparent to the upper-layer IP.
  • Its basic structure uses an access point (AP) to complete the wireless access of user terminals, and forms an IP transmission network through network control and connection of device connections.
  • AP access point
  • WLAN and various wireless mobile communication networks such as: GSM, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, Time Division Duplex-Synchronous Code Division Multiple Access (TD-SCDMA) system and CDMA2000 system are becoming the focus of current research.
  • 3GPP 3rd Generation Partnership Project
  • user terminals can interact with the Internet (Internet) and enterprises through an WLAN access network.
  • Intranet connection and can also be connected to the home network of the 3GPP system or the access network of the 3GPP system via the WLAN access network.
  • the WLAN user terminal accesses locally, it belongs to the 3GPP home via the WLAN access network.
  • the network is connected, as shown in Figure 2.
  • FIG. 1 and FIG. 2 are schematic diagrams of the networking structure of interworking between the WLAN system and the 3GPP system in a roaming situation and a non-roaming situation, respectively.
  • the 3GPP system in the 3GPP system, it mainly includes a Home Subscriber Subscriber Server (HSS) / Home Location Register (HLR), a 3GPP AAA server, a 3GPP AAA proxy, a WAG, a packet data gateway, and a charging gateway (CGw ) / Charging Information Collection System (CCF) and Online Charging System (OCS).
  • HSS Home Subscriber Subscriber Server
  • HLR Home Location Register
  • 3GPP AAA server 3GPP AAA proxy
  • WAG packet data gateway
  • CGw Charging Information Collection System
  • OCS Online Charging System
  • the user terminal, the WLAN access network, and all entities of the 3GPP system form a 3GPP-WLAN interactive network.
  • This 3GPP-WLAN interactive network can be used as a wireless local area network service system.
  • the 3GPP AAA server is responsible for user authentication, authorization, and charging, and collects and transmits the charging information sent by the WLAN access network to the charging system;
  • the packet data gateway is responsible for transferring user data from the WLAN access network to the 3GPP Data transmission of the network or other packet networks;
  • the billing system mainly receives and records user billing information from the network, and also includes the OCS instructs the network to periodically transmit online billing information according to the billing situation of online billing users, and performs statistics and control.
  • the AS sends an access permission message to the user terminal, and the AS assigns the corresponding PDG to the user terminal.
  • the user can access 3GPP PS domain services. Same as B, CGw / CCF and OCS record charging information according to the network usage of the user terminal.
  • the user terminal can apply to the 3GPP home network to access the Internet / Intranet through the 3GPP access network. If the user terminal also wishes to apply for the interworking scenario 3 service and access the 3GPP PS domain service, the user terminal needs to initiate a service authorization process to the 3GPP home network through the 3GPP access network.
  • This process is also between the user terminal and the AS of the 3GPP home network.
  • the AS allocates the corresponding home PDG to the user terminal.
  • the user terminal After the user terminal establishes a tunnel between the WAG in the network and the allocated PDG through the 3GPP, the user terminal can access the 3GPP PS domain service of the home network.
  • the user terminal After a user terminal successfully authorizes and establishes a channel for a service or a group of services, the user terminal has a corresponding IP address and can initiate access to the service. At this time, the user terminal can send data to the relevant service equipment of the business; and because the IP address of the user terminal has been registered for routing upon access, the user terminal can also accept business service equipment or service-related services in the network. Other user terminals send data to this user terminal.
  • Sending data to the user terminal includes two cases: the user terminal has access to the WLAN network, but only connects to WLAN local services such as local internet / intranet; the user terminal accesses the WLAN and connects to activate certain services based on 3GPP PS But does not access the services that need to send data to it, there is currently no plan to notify the user terminal to establish a connection and perform business interaction. Summary of the invention
  • a main object of the present invention is to provide a method for transmitting service data to a user of a wireless local area network, and when a direct connection is not established between a user terminal and a service to be accessed, a service access notification can be sent to the user terminal.
  • a method for sending service data to a wireless local area network user A service notification unit for sending a service access notification to a wireless local area network (WLAN) user terminal is set in the network.
  • a WLAN user terminal is first established with the network after accessing the network.
  • the method further includes:
  • the service service unit sends a service access notification to the service notification unit, and after receiving the service access notification, the service notification unit queries and obtains routing information of a public channel established with the WLAN user terminal;
  • the service notification unit sends a service access notification to the WLAN user terminal through the established public channel according to the routing information obtained in step a.
  • the WLAN user terminal establishes a persistent IP connection with the packet data gateway after accessing the network.
  • the step b is: after the service notification unit obtains the address of the packet data gateway, it sends a service access notification to the packet data gateway.
  • a packet data gateway, and the packet data gateway sends a service access notification to the WLAN user terminal through the persistent IP connection.
  • the querying and fetching of the public channel routing information by the service notification unit in step a further includes: querying the address of the packet data gateway from the contract information storage unit of the network to which the WLAN user terminal belongs according to the WLAN user terminal identifier .
  • the WLAN user terminal identifier is: a network access identifier (NAI), or an IP address, or an international mobile subscriber identity (IMSI), or an international ISDN number (MSISDN), or an IP multimedia subsystem (IMS) of a mobile station.
  • NAI network access identifier
  • IMSI international mobile subscriber identity
  • MSISDN international ISDN number
  • IMS IP multimedia subsystem
  • the step b is: the service notification unit directly through the public channel established between itself and the WLAN user terminal Send the received service access notification from the business service unit to the WLAN user terminal.
  • the method further includes: after the WLAN user terminal leaves the network or reaches a preset time, the WLAN user terminal removes the common channel.
  • the common channel is an independent information transmission connection or a specific notification service business connection that has been established between the WLAN user terminal and the network.
  • the business notification unit is a short message service (SMS) business service unit, or a push (PUSH) business service unit, or an instant messaging (Instant Messaging) business service unit;
  • the specific notification service business is an SMS business, Or PUSH business or Instant Messaging business.
  • the service access notification carries user processing information and service data information; or carries service activation signaling and service access link information.
  • the method further includes: after receiving the service access notification, the WLAN user terminal directly activates the service that sends the service access notification according to the information carried in the notification, establishes a connection with the service, and obtains the service through the established connection.
  • Business data The method may further include: after the WLAN user terminal receives the service access notification, it selects to activate the service or reject the service according to the information carried in the notification.
  • the key of the present invention lies in that after each WLAN user terminal accesses the network, it first actively establishes a persistent connection with the network, and uses this connection as a public channel, such as a packet data gateway or service notification
  • the unit establishes a connection, and sends a service access notification of a service that has not established a direct connection with the destination user terminal to the destination user terminal.
  • each WLAN user terminal actively establishes a continuous connection with the network after accessing the network.
  • the connection is an IP connection that is mutually reachable between the network device and the user device within a certain duration.
  • Figure 1 is a schematic diagram of the network structure for interworking between the WLAN system and the 3GPP system in the case of roaming
  • Figure 2 is a schematic diagram of the network structure for interworking between the WLAN system and the 3GPP system in the non-roaming situation
  • FIG. 3 is a schematic diagram of an embodiment of a 3GPP-WLAN service network structure adopted by the present invention
  • FIG. 4 is a schematic flowchart of Embodiment 1 of a service notification according to the present invention
  • FIG. 5 is a schematic flowchart of a second embodiment of a service notification according to the present invention.
  • FIG. 6 is a schematic flowchart of a third embodiment of a service notification according to the present invention.
  • FIG. 7 is a schematic flowchart of a fourth embodiment of a service notification according to the present invention. Mode of Carrying Out the Invention
  • the core idea of the present invention is: after each WLAN user terminal accesses the network, it first actively establishes a continuous connection with the network, and uses this connection as a public channel to establish services that have not been directly connected to the destination user terminal.
  • the service access notification is sent to the destination user terminal.
  • the target user terminal may choose to receive or not receive the service data. If the user terminal wishes to receive the service data, the user terminal activates the service through the WLAN network and establishes a connection, and then obtains the service data through the established connection.
  • the persistent connection means that the user terminal always exists after the user terminal is connected to the network.
  • the connection establishment with the network may be a connection established between a WLAN user terminal and a packet data gateway, or a connection established directly with a service notification unit, for example, the user terminal registers an IP address allocated by the network to the service notification unit, and the service The notification unit can reach the user terminal by sending an IP data packet according to this IP address.
  • the packet data gateway may be a packet data gateway to which the WLAN user terminal belongs, or may be a packet data gateway designated by the network.
  • the service notification unit may be a separately set network entity, which is specifically used to send service access notifications to WLAN users.
  • the terminal establishes a continuously connected network entity; it may also be a business notification function module in a business service unit. If the service notification unit needs to obtain the connection route of the public channel, it generally queries the HLR or HSS to obtain the routing information of the public channel established with the destination user terminal, and then further sends a service access notification based on the obtained route; the user can also log in The service notification unit registers the connection address of the WLAN user terminal at any time.
  • the service notification unit records Information about the current service data to be sent is then sent to the destination user terminal in two ways: one is that once it is found that the destination user terminal accesses the WLAN network, it actively sends notification information or service data information to the destination user terminal; another One is that when the destination user terminal accesses the WLAN network, it actively registers with the service notification unit. At this time, the service notification unit sends notification information or service data information to the destination user terminal. The following only takes the case where the WLAN user terminal has accessed the network but has not established a connection with the service that needs to send data as an example for detailed description.
  • FIG. 3 is a schematic diagram of an application example of a 3GPP-WLAN service network structure used in the present invention.
  • a service notification unit is simultaneously with a user subscription information storage unit and a packet data gateway ( PDG), packet business service unit /
  • PDG packet data gateway
  • the service network is connected, where the user subscription information storage unit can be HSS, HLR; the access authentication and authorization unit can be 3GPP AS; the service notification unit can be a certain business service unit, such as: SMS service unit, PUSH service unit, Instant Messaging business unit.
  • FIG. 4 to FIG. 7 are several specific embodiments for implementing service notification in the present invention, where a WLAN user terminal is a destination user terminal to be accessed by a service, and it is assumed in the embodiment that the service is a service A.
  • the first embodiment shown in FIG. 4 is an embodiment in which a WLAN user terminal establishes a common channel with a packet data gateway.
  • the embodiments shown in FIGS. 5 to 7 are embodiments in which the WLAN user terminal directly establishes a common channel with different business service units, that is, That is, in these embodiments, a certain business service unit is used as the service notification unit, and the WLAN user terminal directly establishes a common channel with the service notification unit.
  • the service access notification process in this embodiment includes:
  • Steps 401 to 402 After the WLAN network access is completed between the WLAN user terminal and the 3GPP AS; immediately send a message to the 3GPP AS requesting establishment and requesting authorization to transmit a public channel for service access notification; after receiving the message, the 3GPP AS first determines Whether there is a packet data gateway specified by the network, and if so, the address of the specified packet data gateway is sent to the currently requesting WLAN user terminal; otherwise, the 3GPP AS sends the address of the packet data gateway to which the currently requested WLAN user terminal belongs to The WLAN user terminal.
  • Steps 403 to 404 After the WLAN user terminal obtains the packet data gateway address, it establishes a public channel for transmitting service access notifications with the corresponding packet data gateway according to the address; and registers relevant information such as the user terminal identifier and the IP address corresponding to the public channel to HSS , So that other network entities can search.
  • the WLAN user terminal may also directly register related information such as the user terminal identifier and the IP address corresponding to the public channel into the service notification unit at the same time.
  • Step 405 When service A wants to send data to the WLAN user terminal, and the service unit of service A finds that no connection has been established with the target user terminal during data transmission processing, then The service A service unit first determines whether the service access information needs to be notified to the destination user terminal based on the user contract information of the destination user terminal or according to the operating rules. If not, the notification is sent to the service notification unit.
  • the target user terminal identity may be a network access identity (NAI), an IP address, an international mobile subscriber identity (IMSI), a mobile station international ISDN number (MSISDN), or an IMS user public identity (PSI), SIP-URL identification, etc.
  • NAI network access identity
  • IMSI international mobile subscriber identity
  • MSISDN mobile station international ISDN number
  • PSI IMS user public identity
  • SIP-URL identification SIP-URL identification
  • the failure to find the connection between the service A service unit and the destination user terminal means that: the service A service unit finds that the destination user terminal has not registered with itself, and does not store relevant information about the destination user terminal, such as: no IP address, Or its IP address is invalid data, etc., the business service unit considers that it cannot reach the user terminal.
  • the service notification unit must also According to the sent user ID, the user subscription information storage unit is further searched for a corresponding user ID that is consistent with its own storage type, and then the user ID is used to determine whether the WLAN user terminal has established a public channel with itself.
  • Steps 406 to 407 After receiving the service A access notification, the service notification unit sends a routing query request carrying the destination user terminal identifier to the HSS, and queries the connection routing information of the destination user terminal according to the destination user terminal identifier. After the HSS receives the request, First query whether the user terminal has access to the network, and if so, the address of the packet data gateway that will establish a public channel with the user terminal Returned to the business notification unit.
  • steps 406 and 407 may be omitted.
  • Step 408 The service notification unit sends the access notification of service A to the packet data gateway according to the obtained address of the packet data gateway, and the packet data gateway sends the access notification of service A to the destination through the established public channel. User terminal.
  • the service access notification may include user processing information, such as user information that can be displayed for the user to make a judgment choice; or include a service activation instruction or service link information for the user
  • the terminal automatically completes processes such as service activation and establishing a connection with the business service unit; the notification may also include the business data to be sent for the current business to be accessed, that is, the business data to be sent is directly sent to the destination user through the business access notification terminal.
  • step 408 After receiving the notification of access to service A, the target user terminal may automatically activate service A according to the information contained in the notification, and then establish and establish a service with the network after the service is authenticated and authorized by the network.
  • the service connection between service units A obtains corresponding data from service unit A.
  • the destination user terminal completes the operations of service activation, connection establishment, and data acquisition according to the service activation instruction or link information in the service access notification; purpose
  • the user terminal may also determine whether to activate or reject service A according to the selection of the destination user.
  • the destination user performs a selection operation according to the display information in the service access notification.
  • Embodiment two Embodiment two:
  • an SMS service unit is used as a service notification unit.
  • the service access notification process in this embodiment includes:
  • Steps 501 to 502 Basically the same as steps 401 to 402 in the first embodiment, except that the WLAN user terminal applies to 3GPPAS to establish an SMS service channel. After receiving the application, 3GPPAS returns the address of the business service unit to the WLAN user terminal.
  • the service server in this embodiment The service unit is an SMS service unit.
  • Step 503 After receiving the IP address of the SMS service unit, the WLAN user terminal directly establishes a public channel for transmitting service access notifications with the SMS service unit through its own packet data gateway. After the public channel is established, the WLAN user terminal must identify the user terminal. Relevant information such as the IP address corresponding to the public channel is registered in the SMS good service unit.
  • Step 504 When there is a service A to send data to the WLAN user terminal, and the service unit of the service A finds that no connection is established with the destination user terminal during data transmission processing, the service unit of the service A firstly according to the user of the destination user terminal The contract information or according to the operating rules determines whether the service access information needs to be notified to the destination user terminal. If not, the transmission is terminated. Otherwise, the service A service unit sends the service A access notice to the SMS service unit.
  • the access notice may carry Displayed user information for users to make judgments and choices; or carry service activation instructions or service link information for user terminals to automatically complete processes such as service activation and connection establishment with business service units; they can also carry service A requirements Business data sent.
  • Step 505 After receiving the service A access notification, the SMS service unit directly sends the service A access notification and even service data information to the WLAN user terminal through the public channel established with the WLAN user terminal.
  • step 506 may be further included.
  • the WLAN user terminal may automatically activate service A, or choose to activate service A or reject service A.
  • the specific implementation process is the same as step 409.
  • a PUSH service unit is used as a service notification unit.
  • the service access notification process in this embodiment includes:
  • Steps 601 to 602 It is exactly the same as steps 401 to 402 in the first embodiment, except that after the 3GPP AS receives the connection establishment request, it returns the address of the business service unit to the WLAN user terminal.
  • the business service unit in this embodiment Service unit for PUSH.
  • Steps 603 to 605 It is completely the same as steps 503 to 505 in the second embodiment, except that the SMS service unit in the step is replaced with a PUSH service unit.
  • step 606 may be further included.
  • the WLAN user terminal may automatically activate service A, or choose to activate service A or reject service A.
  • the specific implementation process is the same as step 409.
  • Embodiment 4 is a diagrammatic representation of Embodiment 4:
  • an instant message service unit is used as a service notification unit.
  • the service access notification process in this embodiment includes:
  • Steps 701 to 702 are exactly the same as steps 401 to 402 in the first embodiment, except that after the 3GPP AS receives the connection establishment request, the address of the business service unit is returned to the WLAN user terminal.
  • the business service unit in this embodiment is instant Message service unit.
  • Steps 703 to 705 are exactly the same as steps 503 to 505 in the second embodiment, except that the SMS service unit in the step is replaced with an instant message service unit.
  • step 706 may be further included.
  • the WLAN user terminal may automatically activate service A, or choose to activate service A or reject service A.
  • the specific implementation process is the same as step 409.
  • the current service unit if the type of user ID sent by the business service unit to the current service unit is different from the type of user ID stored in the current service unit, the current service unit must also send the user ID sent Go to the user subscription information storage unit to further find the corresponding user ID that is consistent with its own storage type, and then determine whether the WLAN user terminal has established a public channel with itself based on the found user ID.

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Description

一种给无线局域网用户发送业务数据的方法 技术领域
本发明涉及无线局域网中的业务接入技术，特别是指一种给无线局域 网用户发送业务数据的方法。 发明背景
由于用户对无线接入速率的要求越来越高， 无线局域网 （WLAN, Wireless Local AreaNetwork )应运而生， 它能在较小范围内提供高速的无 线数据接入。无线局域网包括多种不同技术， 目前应用较为广泛的一个技 术标准是 IEEE 802.11b, 它采用 2.4GHz频段， 最高数据传输速率可达 11Mbps, 使用该频段的还有 IEEE 802.11g和蓝牙 （Bluetooth )技术， 其 中， 802.1 lg最高数据传输速率可达 54Mbps。其它新技术诸如 IEEE 802.11a 和 ETSI BRAN Hiperlan2 都使用 5GHz 频段， 最高传输速率也可达到 54Mbps =
尽管有多种不同的无线接入技术， 大部分 WLAN都用来传输因特网 协议（IP )分组数据包。 对于一个无线 IP网絡， 其采用的具体 WLAN接 入技术对于上层的 IP—般是透明的。其基本的结构都是利用接入点（AP ) 完成用户终端的无线接入， 通过网絡控制和连接设备连接组成 IP传输网 絡。
随着 WLAN技术的兴起和发展， WLAN与各种无线移动通信网， 诸 如： GSM、 码分多址（CDMA ) 系统、 宽带码分多址（WCDMA ) 系统、 时分双工-同步码分多址（ TD-SCDMA ) 系统、 CDMA2000系统的互通正 成为当前研究的重点。 在第三代合作伙伴计划 （3GPP )标准化组织中， 用户终端可以通过 WLAN 的接入网络与因特网 （ Internet )、 企业内部互 联网 （Intranet )相连， 还可以经由 WLAN接入网络与 3GPP系统的归属 网络或 3GPP系统的访问网络连接，具体地说就 ， WLAN用户终端在本 地接入时， 经由 WLAN接入网络与 3GPP的归属网络相连， 如图 2所示； 在漫游时， 经由 WLAN接入网络与 3GPP的访问网络相连， 3GPP访问网 络中的部分实体分别与 3GPP 归属网络中的相应实体互连， 比如： 3GPP 访问网络中的 3GPP认证授权计费 （AAA )代理和 3GPP 归属网络中的 3GPP认证授权计费 （AAA )服务器； 3GPP访问网络中的无线局域网接 入关口 （WAG )与 3GPP归属网络中的分组数据关口 （PDG, Packet Data Gateway )等等， 如图 1所示。 其中， 图 1、 图 2分别为漫游情况下和非 漫游情况下 WLAN系统与 3GPP系统互通的组网结构示意图。
参见图 1、 图 2所示， 在 3GPP系统中， 主要包括归属签约用户服务 器（HSS ) /归属位置寄存器（HLR )、 3GPP AAA服务器、 3GPP AAA代 理、 WAG、 分组数据关口、 计费关口 （CGw ) /计费信息收集系统（CCF ) 及在线计费系统（OCS )。 用户终端、 WLAN接入网络与 3GPP系统的所 有实体共同构成了 3GPP-WLAN交互网络， 此 3GPP-WLAN交互网络可 作为一种无线局域网服务系统。 其中， 3GPP AAA服务器负责对用户的鉴 权、 授权和计费， 对 WLAN接入网络送来的计费信息收集并传送给计费 系统； 分组数据关口负责将用户数据从 WLAN接入网络到 3GPP网絡或 其他分组网络的数据传输；计费系统主要接收和记录网络传来的用户计费 信息， 还包括 OCS根据在线计费用户的费用情况指示网络周期性的传送 在线费用信息， 并进行统计和控制。
在非漫游情况下， 当 WLAN用户终端希望直接接入 Internet/Intranet 时， 用户终端通过 WLAN接入网与 AAA服务器（AS )完成接入认证授 权后 ,用户终端可通过 WLAN接入网接入到 Intemet/Intranet。如果 WLAN 用户终端还希望接入 3GPP分组交换 ( PS )域业务， 则可进一步向 3GPP 归属网络申请互通场景 3 ( Scenario3 ) 的业务， 即： WLAN用户终端向 3GPP归属网络的 AS发起互通场景 3的业务授权请求， 3GPP归属网絡的 AS对该业务授权请求进行业务鉴权和授权， 如果成功， 则 AS给用户终. 端发送接入允许消息，且 AS给用户终端分配相应的 PDG ,用户终端与所 分配的 PDG之间建立隧道后，即可接入 3GPP PS域业务。同 B于， CGw/CCF 和 OCS才艮据用户终端的网络使用情况记录计费信息。 在漫游情况下， 当 WLA 用户终端希望直接接入 Internet/Intranet时，用户终端可通过 3GPP 访问网络向 3GPP归属网络申请接入到 Intemet/Intranet。 如果用户终端还 希望申请互通场景 3业务， 接入到 3GPP PS域业务， 则用户终端需要通 过 3GPP访问网络向 3GPP归属网络发起业务授权过程， 该过程同样在用 户终端和 3GPP归属网络的 AS之间进行， 当授权成功后， AS给用户终 端分配相应的归属 PDG,用户终端通过 3GPP访问网络中的 WAG与分配 的 PDG之间建立隧道后，用户终端即可接入归属网络的 3GPP PS域业务。
从上述过程可以看出，用户终端针对一个或一组业务授权成功并建立 通道后， 用户终端就拥有了相应的 IP地址， 就可以发起向业务的访问。 此时， 用户终端可以向业务的相关服务设备发送数据； 并且， 由于用户终 端的 IP地址已在接入时进行路由登记， 因此， 该用户终端也可以接受网 络中业务服务设备或与业务相关的其它用户终端向本用户终端发送数据。
但是，如果此时用户终端虽然已接入 WLAN网絡，但还没有通过 PDG 建立与网络业务之间的通道连接， 或是还没建立对某个或某组业务的通 道， 而此时有业务需要向该用户终端发送数据， 包括两种情况： 用户终端 已接入 WLAN网络，但只连接了诸如本地 internet/intranet等 WLAN本地 业务； 用户终端接入 WLAN并连接激活了基于 3GPP PS的某些业务， 但 并未接入需要向其发送数据的业务，则目前还没有方案通知用户终端建立 连接并进行业务交互。 发明内容
有鉴于此，本发明的主要目的在于提供一种给无线局域网用户发送业 务数据的方法， 在用户终端与要访问业务之间未建立直接连接的情况下， 能将业务访问通知发送给用户终端。
为达到上述目的， 本发明的技术方案是这样实现的：
一种给无线局域网用户发送业务数据的方法，在网络中设定用于向无 线局域网（WLAN )用户终端发送业务访问通知的业务通知单元， WLAN 用户终端在接入网络后先与网络之间建立发送业务访问通知的持续连接 作为公共通道， 一个业务服务单元向未与自身建立直接连接的 WLAN用 户终端发送数据前， 该方法还包括：
a. 所述业务服务单元向所述业务通知单元发送业务访问通知， 所述 业务通知单元收到业务访问通知后， 查询并获取与所述 WLAN用户终端 建立的公共通道的路由信息；
b. 业务通知单元根据步骤 a所获取的路由信息， 将业务访问通知通 过所建立的公共通道发送给所述 WLAN用户终端。
上述方案中， WLAN用户终端在接入网络后先与分组数据关口建立 一条持续存在的 IP连接， 所述步驟 b为： 业务通知单元获取该分组数据 关口的地址后，将业务访问通知发给该分组数据关口，再由该分组数据关 口通过所述持续存在的 IP连接将业务访问通知发送给 WLAN用户终端。 那么，步驟 a中所述业务通知单元查询并荻取公共通道的路由信息进一步 包括：业务通知单元根据 WLAN用户终端标识向该 WLAN用户终端所属 网络的签约信息存储单元查询所述分组数据关口的地址。 其中， 所述 WLAN用户终端标识为： 网络接入标识（NAI )、 或 IP地址、 或国际移动 用户标识（IMSI )、 或移动台国际 ISDN号码（MSISDN ), 或 IP多媒体 子系统（IMS )的用户公共标识（PSI ), 或起始会话协议统一资源定位器 04 000690
( SIP-URL ) 标识。
上述方案中， WLAN用户终端在接入网络后与业务通知单元直接建 立一条持续存在的公共通道， 则所述步骤 b为： 业务通知单元直接通过自 身与所述 WLAN用户终端之间建立的公共通道， 将收到的业务服务单元 发来的业务访问通知发送给 WLAN用户终端。
该方法进一步包括： 在 WLAN用户终端离开网络或到达预先设定的 时间后， WLAN用户终端拆除所述的公共通道。
上述方案中，所述公共通道为独立存在的信息传输连接，或为 WLAN 用户终端与网络之间已建立的特定的通知服务业务连接。其中，所述的业 务通知单元是短消息服务（SMS )业务服务单元、 或推送（PUSH )业务 服务单元、 或即时消息（Instant Messaging )业务服务单元； 所述特定的 通知服务业务为 SMS业务、 或 PUSH业务或 Instant Messaging业务。
上述方案中，所述业务访问通知中携带有用户处理信息、业务数据信 息； 或携带有激活业务的信令、 业务访问的链接信息。 那么， 该方法进一 步包括： WLAN用户终端收到业务访问通知后， 根据通知中携带的信息 直接激活发送业务访问通知的业务，并建立与该业务之间的连接，通过所 建立的连接获取该业务的业务数据。 该方法也可进一步包括： WLAN用 户终端收到业务访问通知后， 据通知中携带的信息选择激活该业务或拒 绝该业务。
由上述方案可以看出， 本发明的关键在于： 每个 WLAN用户终端在 接入网络后， 先主动与网络建立一条持续存在的连接， 以此连接作为公共 通道， 比如与分組数据关口或业务通知单元建立连接，将未与目的用户终 端建立直接连接的业务的业务访问通知发送给目的用户终端。
本发明所提供的给无线局域网用户发送业务数据的方法， 每个 WLAN 用户终端在接入网絡后就主动与网络建立一条持续连接， 该持续 连接是在一定持续时间内网络设备与用户设备之间互相可达的 IP连接， 当某个业务需要给 WLAN用户终端下发数据， 而发现虽然该用户终端已 接入网络但未与自身建立直接连接时，可通过所建立的持续连接将业务访 问通知， 甚至业务数据信息发送给目的用户终端， 通知该用户终端通过 WLAN建立与该业务的连接，从而解决了 WLAN用户终端无法获知有未 连接业务要向自身发送数据的问题。 附图简要说明
图 1为漫游情况下 WLAN系统与 3GPP系统互通的网络结构示意图； 图 2为非漫游情况下 WLAN系统与 3GPP系统互通的网络结构示意 图；
图 3为本发明采用的 3GPP-WLAN服务网络结构一实施例示意图； . 图 4为本发明实现业务通知实施例一的流程示意图；
图 5为本发明实现业务通知实施例二的流程示意图；
图 6为本发明实现业务通知实施例三的流程示意图；
图 7为本发明实现业务通知实施例四的流程示意图。 实施本发明的方式
本发明的核心思想是： 让每个 WLAN用户终端在接入网络后， 先主 动与网络间建立一条持续存在的连接， 以此连接作为公共通道，将未与目 的用户终端建立直接连接的业务的业务访问通知发送给目的用户终端。目 的用户终端收到通知信息后，可自行选择接收或不接收该业务数据， 如果 用户终端希望接收该业务数据， 则通过 WLAN网络激活该业务并建立连 接， 然后通过所建立的连接获得业务数据。
这里，所述持续存在的连接是指在用户终端与网络连接后，一直存在 直到用户离开网絡的持续性连接；或是用户终端选择存在一定时间但不因 某业务的结束而中断的持续性连接。 所述与网络建立连接可以是 WLAN 用户终端与分组数据关口之间建立的连接；或是与业务通知单元之间直接 建立的连接， 比如用户终端将网络分配的 IP地址登记到业务通知单元， 业务通知单元根据此 IP地址发送 IP数据包就可以到达用户终端。 其中， 分组数据关口可以是该 WLAN用户终端所属的分组数据关口， 也可以是 网絡指定的分组数据关口； 业务通知单元可以是单独设置的网络实体， 专 门用于将业务访问通知发送给与 WLAN用户终端建立持续连接的网络实 体； 也可以是某个业务服务单元中的业务通知功能模块。如果业务通知单 元需要获取公共通道的连接路由， 一般是到 HLR或 HSS中查询， 获取与 目的用户终端所建立公共通道的路由信息，然后进一步根据获取的路由发 送业务访问通知； 也可以由用户登录时到该业务通知单元登记该 WLAN 用户终端的连接地址。
在实际应用中， 也有可能某业务要向某个用户终端发送业务数据时， 经过业务通知单元的查询发现该目的用户终端尚未接入 WLAN网絡， 那 么， 此种情况下， 业务通知单元先记录下当前要发送业务数据的信息， 然 后通过两种方式发送给目的用户终端：一种是， 一旦发现目的用户终端接 入 WLAN网络， 就主动将通知信息或业务数据信息发送给该目的用户终 端； 另一种是， 目的用户终端接入 WLAN网絡时， 主动到业务通知单元 进行登记，此时，业务通知单元再将通知信息或业务数据信息发送给该目 的用户终端。 下面仅以 WLAN用户终端已接入网络， 但未与需要发送数 据的业务建立连接的情况为例进行详细说明。
参见图 3所示， 图 3为本发明所采用的 3GPP- WLAN服务网络结构 的一应用实例示意图， 在该 3GPP-WLAN服务网络中， 业务通知单元同 时与用户签约信息存储单元、 分组数据关口 （PDG )、 分组业务服务单元 / 服务网相连， 其中， 用户签约信息存储单元可以是 HSS、 HLR; 接入鉴权 授权单元可以是 3GPP AS;业务通知单元可以是某个业务服务单元，比如： SMS服务单元、 PUSH服务单元、 Instant Messaging业务 务单元等。
基于图 3所示的网络结构，图 4至图 7为本发明实现业务通知的几个 具体实施例， 其中， WLAN用户终端为某业务要访问的目的用户终端， 实施例中假定该业务为业务 A。 图 4所示的实施例一为 WLAN用户终端 与分组数据关口建立公共通道的实施例； 图 5至图 7所示均为 WLAN用 户终端直接与不同业务服务单元建立公共通道的实施例，也就是说，在这 几个实施例中， 是将某业务服务单元作为业务通知单元， WLAN 用户终 端直接与业务通知单元建立公共通道。
实施例一：
如图 4所示， 本实施例中的业务访问通知过程包括：
步驟 401 402: WLAN用户终端与 3GPP AS之间完成 WLAN网络接 入后； 马上向 3GPP AS发送请求建立以及请求授权用于传输业务访问通 知的公共通道的消息； 3GPPAS收到该消息后，先判断是否存在网絡指定 的分组数据关口 ,如果是， 则将指定分组数据关口的地址发送给当前发请 求的 WLAN用户终端， 否则， 3GPP AS将当前发请求的 WLAN用户终端 所属的分组数据关口地址发送给该 WLAN用户终端。
步骤 403〜404： WLAN用户终端获取分组数据关口地址后，根据地址 与对应的分组数据关口建立传输业务访问通知的公共通道；并将用户终端 标识和公共通道对应的 IP地址等相关信息登记到 HSS中， 以便其它网絡 实体进行查找。 这里， WLAN 用户终端也可以同时将用户终端标识和公 共通道对应的 IP地址等相关信息直接登记到业务通知单元中。
步骤 405: 当有业务 A要向该 WLAN用户终端发送数据， 业务 A服 务单元在进行数据发送处理时发现没有与目的用户终端之间建立连接，则 业务 A服务单元先根据该目的用户终端的用户签约信息或根据运营规则 , 判断是否需要将业务访问信息通知目的用户终端，如果不需要，则结束发 知发送给业务通知单元。
这里， 所述的目的用户终端标识可以是网络接入标识（NAI )、 IP地 址、 国际移动用户标识（IMSI )、 移动台国际 ISDN号码（MSISDN ), 或 是 IMS的用户公共标识（PSI )、 SIP-URL标识等等任何在移动通信网内 可以识別用户终端的永久标识；所述用户签约信息是指由用户确定哪些业 务是必须发送给用户终端的，哪些业务是根据当前需求或当前运行环境来 决定是否发送给用户终端； 所述运营规则是指由运营商确定的，哪些业务 应该在何种情况下发送给用户终端的原则。 所述业务 A服务单元未发现 与目的用户终端间的连接是指： 业务 A服务单元发现目的用户终端未在 自身进行授权登记， 自身未存储目的用户终端的相关信息，如： 未存储 IP 地址、 或其 IP地址为无效数据等， 则业务服务单元认为无法到达用户终 端。
如果 WLAN用户终端在公共通道建立后已将相关信息登记到业务通 知单元 ,而业务服务单元发送过来的用户标识类型与业务通知单元中所存 储的用户标识类型不一致 ,则业务通知单元还要才艮据发送过来的用户标识 到用户签约信息存储单元中进一步查找对应的与自身存储类型一致的用 户标识， 然后再根据查到的用户标识判断该 WLAN用户终端是否已与自 身建立公共通道。
步骤 406〜407： 业务通知单元收到业务 A访问通知后，发送携带有目 的用户终端标识的路由查询请求给 HSS，根据目的用户终端标识查询该目 的用户终端的连接路由信息， HSS收到请求后先查询该用户终端是否已接 入网络，如果是， 则将与该用户终端建立公共通道的分组数据关口的地址 返回给业务通知单元。
如果 WLAN用户终端在业务通知单元中登记了公共通道的相关信 息， 则步驟 406、 407可以省略。
步骤 408: 业务通知单元根据所获取的分组数据关口的地址， 将业务 A的访问通知发送至该分组数据关口，再由该分组数据关口通过所建立的 公共通道将该业务 A访问通知发送至目的用户终端。
• 在上述步骤的实现过程中，所述业务访问通知中可以包括用户处理信 息， 如能够显示的用户信息， 以供用户进行判断选择； 或包括对业务激活 的指令或业务链接信息， 以供用户终端自动完成业务激活、与业务服务单 元建立连接等过程；该通知中还可以包括当前要访问业务所要发送的业务 数据，也就是说，将所要发送的业务数据直接通过业务访问通知发送给目 的用户终端。
在步骤 408之后， 可进一步包括步骤 409: 目的用户终端收到业务 A 访问通知后，可根据通知中所包含的信息自动激活业务 A, 然后经过网络 对业务的鉴权和授权后， 建立与业务 A服务单元之间的业务连接， 从业 务 A服务单元获取相应的数据， 这里目的用户终端是根据业务访问通知 中的业务激活指令或链接信息完成业务激活、连接建立以及获取数据的操 作的；目的用户终端也可以根据目的用户的选择，确定激活或拒绝业务 A, 这里目的用户是根据业务访问通知中的显示信息进行选择操作的。 实施例二：
如图 5所示， 本实施例中是将 SMS服务单元作为业务通知单元， 本 实施例中的业务访问通知过程包括：
步驟 501〜502：与实施例一中的步骤 401~402基本相同 ,只不过 WLAN 用户终端是向 3GPPAS申请建立 SMS业务通道， 3GPPAS收到申请后， 向 WLAN用户终端返回的是业务服务单元的地址， 本实施例中的业务服 务单元为 SMS服务单元。
步骤 503: WLAN用户终端收到 SMS服务单元的 IP地址后， 通过所 属分组数据关口直接与 SMS服务单元建立用于传输业务访问通知的公共 通道， 建立公共通道后， WLAN用户终端要将用户终端标识和公共通道 对应的 IP地址等相关信息登记到 SMS 良务单元中。
步骤 504: 当有业务 A要向该 WLAN用户终端发送数据， 业务 A服 务单元在进行数据发送处理时发现没有与目的用户终端之间建立连接，则 业务 A服务单元先根据该目的用户终端的用户签约信息或根据运营规则， 判断是否需要将业务访问信息通知目的用户终端，如果不需要，则结束发 送， 否则， 业务 A服务单元将业务 A访问通知发送给 SMS服务单元， 该 访问通知中可携带有显示的用户信息， 以供用户进行判断选择； 或携带对 业务激活的指令或业务链接信息， 以供用户终端自动完成业务激活、与业 务服务单元建立连接等过程； 还可以携带有业务 A要发送的业务数据。
步骤 505: SMS服务单元收到业务 A访问通知后， 直接通过与该 WLAN用户终端已建立的公共通道， 将业务 A访问通知， 甚至业务数据 信息发送给该 WLAN用户终端。
同样， 步骤 505之后， 可进一步包括步骤 506: WLAN用户终端收到 业务访问通知后，可自动激活业务 A,或是选择激活业务 A或拒绝业务 A, 具体实现过程与步骤 409相同。
实施例三：
如图 6所示，本实施例中是将 PUSH服务单元作为业务通知单元，本 实施例中的业务访问通知过程包括：
步骤 601〜602：与实施例一中的步骤 401~402完全相同，只不过 3GPP AS收到连接建立请求后，向 WLAN用户终端返回的是业务服务单元的地 址， 本实施例中的业务服务单元为 PUSH服务单元。 步骤 603〜605: 与实施例二中的步骤 503〜505完全相同， 只不过将步 骤中的 SMS服务单元替换为 PUSH服务单元。
同样， 步骤 605之后， 可进一步包括步骤 606: WLAN用户终端收到 业务访问通知后，可自动激活业务 A，或是选择激活业务 A或拒绝业务 A, 具体实现过程与步骤 409相同。
实施例四：
如图 7所示， 本实施例中是将即时消息服务单元作为业务通知单元， 本实施例中的业务访问通知过程包括：
步骤 701 702:与实施例一中的步驟 401 402完全相同，只不过 3GPP AS收到连接建立请求后，向 WLAN用户终端返回的是业务服务单元的地 址， 本实施例中的业务服务单元为即时消息服务单元。
步骤 703〜705： 与实施例二中的步骤 503〜505完全相同， 只不过将步 骤中的 SMS服务单元替换为即时消息服务单元。
同样， 步骤 705之后， 可进一步包括步驟 706: WLAN用户终端收到 业务访问通知后，可自动激活业务 A,或是选择激活业务 A或拒绝业务 A, 具体实现过程与步骤 409相同。
在实施例二到实施例四中，如果要访问业务服务单元发给当前服务单 元的用户标识类型与当前服务单元中所存储的用户标识类型不一致，则当 前服务单元也要 居发送过来的用户标识到用户签约信息存储单元中进 一步查找对应的与自身存储类型一致的用户标识，然后再才 据查到的用户 标识判断该 WLAN用户终端是否已与自身建立公共通道。
以上所述，仅为本发明的较佳实施例而已， 并非用于限制本发明的保 护范围。

Claims

权利要求书
1、 一种给无线局域网用户发送业务数据的方法， 其特征在于： 在网 络中设定用于向无线局域网（ LAN )用户终端发送业务访问通知的业务 通知单元， WLAN用户终端在接入网络后先与网络之间建立发送业务访 问通知的持续连接作为公共通道，一个业务服务单元向未与自身建立直接 连接的 WLAN用户终端发送数据前， 该方法还包括：
a. 所述业务服务单元向所述业务通知单元发送业务访问通知， 所述 业务通知单元收到业务访问通知后， 查询并获取与所述 WLAN用户终端 建立的公共通道的路由信息；
b. 业务通知单元根据步骤 a所获取的路由信息， 将业务访问通知通 过所建立的公共通道发送给所述 WLAN用户终端。
2、 根据权利要求 1所述的方法， 其特征在于， WLAN用户终端在接 入网络后先与分组数据关口建立一条持续存在的 IP连接， 则所述步骤 b 进一步包括：业务通知单元获取与 WLAN用户终端建立持续 IP连接的分 组数据关口的地址，根据所获取的地址将业务访问通知发给该分组数据关 口， 再由该分组数据关口通过所述持续存在的 IP连接将业务访问通知发 送给 WLAN用户终端。
3、 根据权利要求 1所述的方法， 其特征在于， WLAN用户终端在接 入网络后与业务通知单元直接建立一条持续存在的公共通道，则所述步骤 b为： 业务通知单元直接通 ii自身与所述 WLAN用户终端之间建立的公 共通道， 将收到的业务服务单元发来的业务访问通知发送给 WLAN用户 终端。
4、 根据权利要求 2所述的方法， 其特征在于， 步骤 a中所述业务通 知单元查询并获取公共通道的路由信息进一步包括： 业务通知单元根据 WLAN用户终端标识向该 WLAN用户终端所属网络的签约信息存储单元 查询所述分组数据关口的地址。
5、 根据权利要求 4所述的方法， 其特征在于， 所述 WLAN用户终端 标识为： 网络接入标识（NAI )、或 IP地址、或国际移动用户标识（IMSI )、 或移动台国际 ISDN号码（MSISDN ), 或 IP多媒体子系统（IMS ) 的用 户公共标识（PSI ), 或起始会话协议统一资源定位器（SIP-URL )标识。
6、 根据权利要求 1所述的方法， 其特征在于， 该方法进一步包括： 在 WLAN用户终端离开网络或到达预先设定的时间后， WLAN用户终端 拆除所述的公共通道。
7、 根据权利要求 Γ所述的方法， 其特征在于， 所述公共通道为独立 存在的信息传输连接， 或为 WLAN用户终端与网络之间建立的特定的通 知服务业务连接。
8、 根据权利要求 7所述的方法， 其特征在于， 所述的业务通知单元 是短消息服务（SMS )业务服务单元、 或推送（PUSH )业务服务单元、 或即时消息 （Instant Messaging )业务服务单元； 所述特定的通知服务业 务为 SMS业务、 或 PUSH业务或 Instant Messaging业务。
9、 根据权利要求 1所述的方法， 其特征在于， 所述业务访问通知中 携带有用户处理信息、 业务数据信息； 或携带有激活业务的信令、 业务访 问的链接信息。
10、 根据权利要求 9所述的方法， 其特征在于， 该方法进一步包括： WLAN用户终端收到业务访问通知后， 根据通知中携带的信息直接激活 发送业务访问通知的业务， 并建立与该业务之间的连接，通过所建立的连 接获取该业务的业务数据。
11、 根据权利要求 9所述的方法， 其特征在于， 该方法进一步包括： WLAN用户终端收到业务访问通知后， 根据通知中携带的信息选择激活 该业务或拒绝该业务。
PCT/CN2004/000690 2003-06-26 2004-06-25 Method for transmitting traffic data to wireless local area network users WO2004114588A1 (en)

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AT04738288T ATE470291T1 (de) 2003-06-26 2004-06-25 Verfahren zum senden von verkehrsdaten zu benutzern eines drahtlosen lokalen netzwerks
EP04738288A EP1638247B1 (en) 2003-06-26 2004-06-25 Method for transmitting traffic data to wireless local area network users
CA002523404A CA2523404A1 (en) 2003-06-26 2004-06-25 Method for transmitting traffic data to wireless local area network users
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