WO2005036843A1 - A method of user access implementing the combination between cdma system and wireless local area net - Google Patents

Abstract

The invention relates to a method of user access implementing the combination between CDMA system and Wireless Local Area Net, using the said CDMA system to authenticate the user terminal of Wireless Local Area Net. This method includes: the user terminal of the said Wireless Local Area Net makes an access dialing, requests the Wireless Access Point gateway of the said Wireless Local Area Net for accessing; the said Wireless Access Point Gateway requests the Packet Data Serving Node of the said CDMA system to establish a data connection for the user terminal of the said Wireless Local Area Net; the said CDMA system authenticates the user terminal of the said Wireless Local Area Net which asks for accessing; and, then the said CDMA system makes successful authentication to the user terminal of the said Wireless Local Area Net, establishing a data connection for the user terminal of the said Wireless Local Area Net. The invention implements the user terminal of Wireless Local Area Net combining with CDMA system in a faster and simpler way.

Description

 User access method for realizing combination of CDMA system and wireless local area network

 The present invention relates to a user access method for a communication system, and more particularly, to a user access method combining a CDMA system and a wireless local area network. Background technique

 Code Division Multiple Access (Code Division Multiple Access, CDMA for short) is a commonly used multiple access modulation technology based on wideband spread spectrum technology. The CDMA2000 IX system follows the IS-2000 standard and is the first stage of the development of CDMA2000 cellular mobile communication technology. It can provide a packet data transmission rate of 153.6Kbps.

 The functional nodes of the existing CDMA2000 IX system are shown outside the dotted line in Figure 1. The wireless handset 11 (BTS) establishes a wireless coverage area in the cell for mobile user terminal communication. The base station controller (BSC) can perform the BTS. Control; a packet control function node 12 (PCF), which is used to forward messages between the wireless subsystem and the packet data service node 14 (PDSN). The packet data service node is an interface module for CDMA2000 IX to access the Internet. Between the packet data service node and the packet control function node (PCF) is a standard R-P interface standard (Radio-Packet, R-P for short), that is, A10 / A11 interface, A10 is the data channel, and All is the control channel. The packet data service node provides access services for users of CDMA2000 IX, and users use PDSN to visit, intermediate and home authentication, authorization and accounting servers 19, 17, 18 for authentication, authorization and accounting.

When a user requests a packet data service, the user's identity legitimacy is first verified through the mobile switching center 13 to the home location register 20 (HLR); when the legitimacy verification is passed, A8 / A9 is established between the base station controller (BSC) and the PCF After the interface, the PCF sends a message to the PDSN, and the RP connection is established between the PCF and the PDSN. Then, a PPP connection is established between the mobile user terminal and the PDSN. The PPP connection is established successfully. If it is a Simple IP user, the data service can be started. For Mobile IP users, MIP registration is required, registration is successful, and mobile IP starts Data business. When a user accesses, a complete PPP negotiation process is performed with the PDSN. PPP uses asynchronous HDLC framing.

 Wireless Local Area Network (WLAN) is the product of a combination of computer networks and wireless communication technologies. It provides the use of wireless multiple-access channels to support communication between computers and can provide data transmission rates up to 54 Mbps. Wireless Local Area Networks User terminal dial-up usually uses PPPoE (Point to Point Protocol over Ethernet, Ethernet-based point-to-point protocol) or Web + DHCP (Dynamic Host Configuration Protocol, Dynamic Host Configuration Protocol).

 Compared with wired networks, WLAN has the following advantages: easy installation, flexible use, economical savings, easy expansion, and so on. Because of its irreplaceable advantages, WLAN is rapidly applied to the occasions where networking in mobile and roaming between networks are needed, especially in places where wiring is difficult and data processing is required over long distances. Especially in some industries, such as exhibitions, conferences, travel services, financial services, mobile office systems, etc., WLAN has very great development opportunities. The characteristics of wireless local area network are low price, flexible networking, convenient installation, and support for high-speed wireless data access, which is suitable for applications in hot areas such as airports and hotels.

 In a wireless local area network, a wireless user terminal is connected to a fixed telecommunication network through an access point (AP). The AP provides users with wireless access functions, can provide voice and data access services, and completes the conversion between 802.11 and 802.3 protocols. The data packets converted by the AP are Ethernet data packets.

 However, the wireless LAN provides limited authentication and charging mechanisms for user terminal access. It can only provide authentication at the physical transport layer, and cannot provide charging mechanisms for end users, so it cannot meet the needs of carrier-class applications. Moreover, its coverage is limited to hotspots, which has greatly restricted the wide application of wireless local area networks.

 After nearly 20 years of CDMA system development, CDMA2000 IX has been put into large-scale commercial use. Not only has its authentication and charging mechanism developed more mature and complete, but its coverage is also ubiquitous. However, due to bandwidth limitations, CDMA2000 IX The system's ability to provide high-speed access services to user end users is limited. Therefore, the organic combination of the two systems can give full play to their respective advantages.

The way for wireless LAN user terminals to access the CDMA system is to implement WLAN and CDMA Combining one of the main technical issues. An access method with reasonable functions and easy implementation will be

The promotion and application of CDMA and wireless local area network integration schemes create favorable conditions.

 How to enable wireless LAN users to access the CDMA2000 IX network and organically integrate with CDMA2000 IX users' access methods to provide unified access services for user end users of both networks. Currently, no relevant public literature has been retrieved. Summary of the invention

 The technical problem to be solved by the present invention is to provide a convenient user access method that realizes the combination of a CDMA system and a wireless local area network.

 The system on which the present invention is based includes the original functional nodes of the CDMA system and the functional nodes added after the CDMA system integrates wireless local area network functions. The functional nodes include: a packet data service node, an authentication, authorization, and accounting server; an access point , Wireless access point gateway, etc.

 The technical scheme of the present invention is as follows:

 A user access method for combining a CDMA system with a wireless local area network, using the CDMA system to authenticate a user terminal of the wireless local area network.

 Preferably, the method includes: access dialing by a user terminal of the wireless local area network, requesting access from a wireless access point gateway of the wireless local area network; the wireless access point gateway requesting a packet data service of the CDMA system The node establishes a data connection for a user terminal of the wireless local area network; the CDMA system authenticates the user terminal of the wireless local area network requesting access; and when the CDMA system authenticates the user terminal of the wireless local area network When successful, a data connection is established for a user terminal of the wireless local area network.

 Preferably, the step of access dialing by the user terminal of the wireless local area network further includes: performing a PPPoE dial by the user terminal of the wireless local area network, and sending an access request to a wireless access point gateway of the wireless local area network.

Preferably, the step of the wireless access point gateway requesting the packet data service node of the CDMA system to establish a data connection for a user terminal of the wireless local area network further includes: the access; when the wireless access point gateway allows When a user terminal accessing the wireless local area network, The user terminal of the wireless local area network returns a response message, and sends a request for establishing an RP connection to the packet data service node of the CDMA system.

 Preferably, the step in which the CDMA system authenticates a user terminal of the wireless local area network requesting access further includes: the packet data service node of the CDMA system receives a wireless access point gateway from the wireless local area network as The user terminal of the wireless local area network requests to establish a data connection, and notifies the authentication, authorization, and accounting server of the CDMA system to authenticate the user terminal of the wireless local area network; the authentication, authorization, and accounting server Perform authentication on the information of the user terminal of the wireless local area network, and notify the packet data service node of the authentication result.

 Preferably, the step in which the CDMA system authenticates a user terminal of the wireless local area network requesting access further includes: the authentication, authorization, and accounting server determines the user terminal based on the information of the user terminal of the wireless local area network. Whether the user terminal of the wireless local area network also has CDMA information, and if so, the authentication, authorization and accounting server returns the IMSI of the user terminal of the wireless local area network to the packet data service node; the packet data service node After receiving the information, it is determined that the user terminal of the wireless local area network also has a CDMA2000 IX access function, otherwise it is determined that the user terminal is a simple wireless local area network user terminal.

 Preferably, the step of establishing a data connection for a user terminal of the wireless local area network further comprises: the packet data service node allowing to establish a data connection with a user terminal of the wireless local area network, and sending the data connection to the user terminal of the wireless local area network. An RP connection establishment response message; the user terminal of the wireless local area network starts a data transmission process, and the CDMA system charges the data transmission process of the user terminal of the wireless local area network.

 Preferably, the step of starting a data transmission process by the user terminal of the wireless local area network further includes: starting data transmission between the user terminal of the wireless local area network and the packet data service node; the authentication of the CDMA system, The authorization and accounting server performs accounting in the data transmission process of the user terminal of the wireless local area network according to the information of the user terminal of the wireless local area network.

Preferably, the user terminal of the wireless local area network is a simple wireless local area network user terminal or a dual-mode user terminal having both wireless local area network and CDMA functions. Preferably, a packet transmitted between a user terminal of the wireless local area network and the wireless access point gateway is a PPPOE packet; a packet transmitted between the wireless access point gateway and the packet data service node is encapsulated in a tunnel In the PPP packet.

 Preferably, a standard R-P interface is adopted between the wireless access point gateway and the packet data service node.

 In summary, the present invention provides a mobile user terminal access method based on the combination of CDMA and wireless local area network, which can combine the wide coverage and perfect authentication and charging mechanism of CDMA network and the high bandwidth advantages of wireless local area network to solve the wireless problem. The access management of LAN user terminals provides a basis for unified user management and handover roaming between CDMA and wireless LAN. BRIEF DESCRIPTION OF THE DRAWINGS

 FIG. 1 is a schematic diagram of a network structure in which CDMA2000 1X is combined with a wireless local area network; FIG. 2 is a schematic flowchart of a process in which a wireless local area network user of the present invention accesses a CDMA2000 IX network. detailed description

 The present invention will be described in detail below with reference to the drawings and embodiments.

 The system model of the combination of CDMA and wireless local area network corresponding to the present invention is shown in Figure 1: Outside the dashed line frame are the original functional nodes of the CDMA2000 IX system. The dotted boxes are the functional nodes added after the CDMA2000 IX system integrates wireless LAN functions. among them:

 Wireless transceiver 11 (BTS): A wireless coverage area is established in a cell for mobile user terminal communication, and a base station controller (BSC) can control each BTS.

 Packet control function node 12 (PCF): It is used to realize the connection between the air radio interface and the packet data service node 14 (PDSN), and cooperate to complete the access of CDMA2000 IX users.

Packet data service node 14: In addition to the existing functions of the CDMA2000 IX network, management of wireless LAN users accessed through the wireless access point gateway 15 should also be completed; and authentication, authorization, and accounting servers 17, 18 , 19 cooperate to complete the authentication, authorization, and accounting for wireless LAN users; complete the media stream forwarding of wireless LAN users. The original packet data service node is CDMA2000 IX data users provide access services. In the present invention, the packet data service node increases the access processing of wireless LAN user terminals according to the characteristics of wireless LAN user terminal users.

 Intermediate, home and visit authentication, authorization and accounting servers 17, 18, 19: Authenticate CDMA2000 IX or WLAN users for packet data calls, determine the legitimacy of users, and implement CDMA2000 IX users and WLAN users Unified authorization (that is, when a CDMA2000 IX user is authenticated, if the user also has a wireless LAN access function, the packet data service node 14 will return the user's wireless LAN access characteristics; when the wireless LAN user is authenticated, if It also has a CDMA2000 1X access function and will return the IMSI information of this user to the packet data service node 14); complete the charging function of the packet data call. The original authentication, authorization, and accounting server provides authentication, authorization, and accounting services for CDMA data users. In the present invention, the authentication, authorization, and accounting server is aimed at the characteristics of wireless LAN users, and increases the authentication of wireless LAN users. , Authorization and billing and the processing of unified identification of two users.

 Access point 16 (AP for short): as a wireless LAN user terminal connected to a fixed telecommunications network, it provides wireless access for users and can provide voice and data access services; implement wireless LAN signal conversion Signals transmitted by the wired network, and complete simple management of wireless users and dynamic allocation of wireless channels.

 Wireless access point gateway 15 (APGW): The main function is to implement three-layer tunnel encapsulation and decapsulation of the media stream of the wireless LAN user terminal according to the user, and send the data of the wireless LAN user to the packet data service node 14, or Forward the data sent by the packet data service node 14 to the wireless LAN user.

 The functions of other system units, such as the mobile switching center / visit location register 13, home location register 20, Internet, and home agent, are well known to those in the industry, and will not be repeated here.

 FIG. 2 is a schematic flowchart of a wireless LAN user of the present invention accessing a CDMA2000 IX network, and the access steps are as follows:

 201: The mobile user terminal (wireless local area network user terminal) accesses the wireless local area network through the access point 16;

202: The mobile user terminal performs PPPoE dialing, sends a PPPoE discovery initialization negotiation packet, and searches for a service provider; 203: The wireless access point gateway 15 receives the PPPoE discovery initialization negotiation packet, allows the mobile user terminal to access, and sends a PPPoE discovery providing packet to the mobile user terminal.

 204: The mobile user terminal accepts the PPPoE discovery providing packet, finds the service provider, and sends a PPPoE discovery request negotiation packet to the wireless access point gateway 15;

 205: The wireless access point gateway 15 accepts the request, sends an R-P connection establishment request to the packet data service node 14, and requests to establish an R-P connection with the packet data service node 14.

 206: The packet data service node 14 receives the R-P connection establishment request, allows the mobile user terminal to access, and sends an R-P connection establishment response to the wireless access point gateway 15;

 207: The wireless access point gateway 15 accepts the RP connection establishment response packet sent by the packet data service node 14. At this time, the tunnel between the wireless access point gateway 15 and the packet data service node 14 for the mobile user terminal is successfully established, and the wireless access The point gateway 15 sends a PPPoE discovery session confirmation packet to the mobile user terminal;

 208: The mobile user terminal accepts the PPPoE discovery session confirmation packet, and the PPPoE discovery phase negotiation with the wireless access point gateway 15 is completed, and the mobile user terminal starts negotiation with the packet data service node 14 in the PPPoE session phase;

 209: The PPPoE negotiation is successful, and data can be transmitted between the mobile user terminal and the packet data service node through the wireless access point gateway 15.

 In summary, based on the combination of the CDMA2000 IX system and the wireless local area network system, the present invention proposes a solution for the wireless LAN user terminal access method, so that wireless local area network users or dual-mode users of the wireless local area network and CDMA2000 IX can pass The wireless local area network is connected to the CDMA system. The standard RP interface is adopted between the wireless access point gateway and the packet data service node, which is similar to the interface between the packet control function node and the packet data service node, which is convenient for the packet data service node to unify the wireless LAN users and CDMA2000 IX users. management. The packet data service node can identify whether the currently accessed user is a handover user with the cooperation of the authentication, authorization and accounting server, and make corresponding processing, providing a basis for the user to switch between CDMA2000 IX and wireless local area network. .

The method for the wireless LAN user terminal to access the CDMA system is not only applicable to the CDMA2000 1X system, but also combines lx EV-DO, lx EV-DV and wireless local area network. The access method is also suitable.

 The tunnel encapsulation of the data packets between the wireless access point gateway and the packet data service node described above can not only adopt the general routing encapsulation (ie, GRE), but also other tunnel encapsulation forms such as IPinIP and minimum encapsulation.

Claims

Rights request A user access method for realizing a combination of a CDMA system and a wireless local area network, characterized in that the CDMA system is used to authenticate a user terminal of the wireless local area network.  2. The method according to claim 1, wherein the method comprises:  The user terminal of the wireless local area network performs access dialing, and requests access from a wireless access point gateway of the wireless local area network;  The wireless access point gateway requests the packet data service node of the CDMA system to establish a data connection for a user terminal of the wireless local area network;  The CDMA system authenticates a user terminal of the wireless local area network requesting access; and  When the CDMA system successfully authenticates the user terminal of the wireless local area network, a data connection is established for the user terminal of the wireless local area network.  3. The method according to claim 2, wherein the step of access dialing by the user terminal of the wireless local area network further comprises:  The user terminal of the wireless local area network performs PPPoE dial-up, and sends an access request to the wireless access point gateway of the wireless local area network.  4. The method according to claim 2, wherein the step of the wireless access point gateway requesting the packet data service node of the CDMA system to establish a data connection for a user terminal of the wireless local area network further comprises:  Determining, by the wireless access point gateway, whether the user terminal of the wireless local area network requesting access is allowed to access;  When the wireless access point gateway allows access to a user terminal of the wireless local area network, a response message is returned to the user terminal of the wireless local area network, and a request for establishing an R-P connection is sent to a packet data service node of the CDMA system.  5. The method according to claim 2, wherein the step of the CDMA system authenticating a user terminal of the wireless local area network requesting access further comprises: The packet data service node of the CDMA system receives A wireless access point gateway establishing a data connection request for a user terminal of the wireless local area network, and notifying the authentication, authorization, and accounting server of the CDMA system to authenticate the user terminal of the wireless local area network;  The authentication, authorization, and accounting server performs authentication according to the information of the user terminal of the wireless local area network, and notifies the packet data service node of the authentication result.  6. The method according to claim 5, wherein the step of the CDMA system authenticating a user terminal of the wireless local area network requesting access further comprises:  The authentication, authorization, and accounting server determines whether the user terminal of the wireless local area network has CDMA information at the same time according to the information of the user terminal of the wireless local area network. The 1MSI of the user terminal of the wireless local area network is returned to the packet data service node;  After receiving the information, the packet data service node determines that the user terminal of the wireless local area network also has a CDMA2000 IX access function; otherwise, it determines that the user terminal is a simple wireless local area network user terminal.  7. The method according to claim 2, wherein the step of establishing a data connection for a user terminal of the wireless local area network further comprises:  The packet data service node is allowed to establish a data connection with a user terminal of the wireless local area network, and sends an R-P connection establishment response message to the user terminal of the wireless local area network;  The user terminal of the wireless local area network starts a data transmission process, and the CDMA system charges the data transmission process of the user terminal of the wireless local area network.  8. The method according to claim 7, wherein the step of the user terminal of the wireless local area network initiating a data transmission process further comprises: data transmission;  The authentication, authorization, and accounting server of the CDMA system performs accounting in the data transmission process of the user terminal of the wireless local area network according to the information of the user terminal of the wireless local area network. 9. The method according to claim 1, wherein the user of the wireless local area network The terminal is a simple wireless LAN user terminal or a dual-mode user terminal with both wireless LAN and CDMA functions.  10. The method according to claim 3, wherein the request transmitted between the user terminal of the wireless local area network and the wireless access point gateway is a PPPoE packet.  11. The method according to claim 4, wherein the request transmitted between the wireless access point gateway and the packet data service node is a ppp packet encapsulated in a tunnel.  12. The method according to claim 2, wherein a standard R-P interface is adopted between the wireless access point gateway and the packet data service node.