KR20000008027A - System network for contacting internet/packet network - Google Patents

Abstract

PURPOSE: A system network for contacting an internet/a packet network is provided to give the internet and the air packet network contacting service by minimizing other network interlocking lines for a signal link and a packet data. CONSTITUTION: The system network is formed by plural radio network controllers(RNC), a mobile exchanging station(MSC) connected with the wireless network controller, a visitor position register/a home position register connected with each mobile exchanging station, a packet data gateway node(PDGN), an air wire communication network, a mobile communication network, and an internet network connected to the packet data gateway node. Therefore, the connection of a series communication circuit is provided to the data route between an optional data terminal and the packet data gateway node.

Description

System Network for Internet / Packet Network Access

The present invention relates to a system network for internet / packet network access, and more particularly, to a system network for internet / packet network access that provides Internet and public packet network access services by minimizing other network interworking lines for signal links and packet data. It is about.

Public wireless data communication has gone through the first generation of the use of a dedicated wireless data network or a cellular modem, and now the second generation of wireless data communication using digital cellular / PCS networks It is being held, and wireless data services will continue to be accelerated in the future. In other words, the concept of a voice-only or data-only service has disappeared in wireless mobile communication, and a complex service of voice and data has been taken for granted.

Although voice / data integration services that have been attempted in wired networks have not achieved commercial success, the current trend is the practical voice in cellular / pese wireless communication networks. Data integration services are likely to lead to commercial success first, and the system is defined to provide wireless multimedia services from next generation mobile phone systems (IMT-2000) based on them to broadband multimedia services. Is in progress.

For the success of the global roaming service, high-speed wireless data service, and wireless multimedia service, which are the foundation of the system requirements of the next generation mobile communication system, as required by Q.FIN, Interworking with the packet data communication network is essential and the system network construction method for its implementation is currently proposed in Q.FIN.

1 is a block diagram of a conventional packet network interworking system. That is, the configuration of the Internet and packet network interworking system network for the conventional Internet and wired packet network interworking presented in Q.FNA of ITU-T is configured as shown in FIG.

Referring to FIG. 1, a user data terminal (UDT1,2) is a mobile data terminal receiving a wireless Internet and packet data service by connecting to a mobile terminal (MT1,2), and serving packet data. A packet data serving node (PDSN) becomes a physical element having a packet service control function (PSCF), which is a functional entity defined in Q.FNA, and a packet data gateway node (PDGN) It is a physical element having a packet service gateway control function (PSGCF).

A packet data serving node (PDSN) and a packet data gateway node (PDGN) are network elements that exist for wireless packet data service. The packet data serving node (PDSN) is a radio network controller (RNC) for packet data between a data terminal (UDT) and the Internet. Connect by to perform packet switching forwarding.

Since the packet data serving node (PDSN) and the packet data gateway node (PDGN) must always know the location of the terminal for routing the packet data, the visitor location register / home location register (VLR / HLR) register and signal lines are connected, and the packet data gateway node (PDGN) of the home network is connected with the packet data serving node (PDSN) of the visited network to support roaming and handoff services of mobile data terminals roaming to other provider networks. It must be connected by a network to network interface (NNI).

However, such a conventional Internet and packet network interworking system network has the following problems.

First, in terms of network configuration or packet switching property, it may be effective as a method of transmitting an internet / packet network access radio data call. However, the signal link must be maintained at the packet data serving node and the packet data gateway node, and signal traffic must be generated every time the position of the mobile terminal moves.

In addition, the wireless data service should be executed while the packet data gateway node is connected to the packet data gateway node of another operator. In addition, the operation of the plurality of packet data gateway nodes inevitably increases the signal link, and there is a problem in that the overall communication operation is smoothed only by additionally installing another matching device.

SUMMARY OF THE INVENTION The present invention has been made in view of the problems of the prior art described above, and an object of the present invention is to solve this problem, and the mobile switching center (MSC) of the IMT-2000 next-generation mobile communication system is AMT. In the case of the switch, the network data transmission is performed by removing the packet data serving node (PDSN) and connecting the packet data gateway node (PDGN) to the mobile switching center (MSC). It is to provide a system network for internet / packet network connection which can minimize the circuit.

In order to achieve the above object, the system network for Internet / packet network access of the present invention is connected to a plurality of wireless network controller (RNC), a mobile switching center (MSC) connected to the wireless network controller, and the mobile switching center respectively. It consists of a visitor location register / home location register, a packet data gateway node (PDGN), a public wired communication network, a mobile communication network, and an internet network connected to a packet data gateway node (PDGN). The data path between the nodes PDGN is provided with a connection of a serial communication line, and incoming calls of all mobile data terminals arriving at the packet data gateway node PDGN are connected to the MSC.

1 is a block diagram of a conventional packet network interworking system.

2 is a block diagram of a system network for Internet / packet network access according to the present invention.

3 is a diagram illustrating a protocol stack configuration of a packet root control signal according to the present invention.

4 is a block diagram of an internet / packet data communication protocol stack in accordance with the present invention.

5 is a block diagram of a packet data communication protocol stack between mobile terminals according to the present invention;

Explanation of symbols for main parts of the drawings

MT11, MT12: mobile terminal UDT11, UDT12: data terminal

BS11-BS13: Base Station RNC11, RNC12: Wireless Network Controller

MSC: Mobile Switching Station PDGN: Packet Data Gateway Node

PDSN1-PDSN3: Packet Data Serving Node

VLR / HLR: Visitor Locator / Home Locator

100: PSTN / PCS / PLMN / ISDN / B-ISDN

200: IMT-2000 mobile communication network

300: Internet / PPDN

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

2 is a block diagram of a system network for Internet / packet network access according to the present invention. 2, a system network for Internet / packet network access according to the present invention includes a plurality of wireless network controllers RNC11 and RNC12, a mobile switching center MSC connected to the wireless network controllers RNC11 and RNC12, and a mobile switching station. A visitor location register / home location register (VHR / HLR), a packet data gateway node (PDGN), a public switched telephone network (PSTN), a personal communication system, PCS), Public Land Mobile Network (PLMN), Integrated Services Digital Network (ISDN), Broadband Integrated Services Digital Network (B-ISDN), Mobile (100) It consists of the communication network 200 and the Internet network 300 connected to the packet data gateway node (PDGN), the data path between any data terminal and the packet data gateway node (PDGN) Is provided with a connection of a serial communication line, and incoming calls of all mobile data terminals arriving at a packet data gateway node (PDGN) are connected to a mobile switching center (MSC), and the positioning of the mobile data terminal at the mobile switching center (MSC) To set the packet path.

The network of the next generation mobile communication system 200 may be referred to as a wireless network in which a broadband communication network is built on its own, but in terms of interworking with the Internet / packet network 300, it has a feature of a wireless access network (ACCESS NETWORK) and a data terminal ( In the data path between the UDT and the packet data gateway node PDGN, only the serial communication line connection of the end-to-end exists.

Therefore, it is possible to configure the Internet / packet network interworking system as shown in Figure 2, there is an advantage that the configuration of the network is simplified as shown in Figure 2, the visitor location register / home location register (VLR / HLR) of The effect is to reduce the signal traffic.

In addition, all mobile data terminal incoming signals arriving at the packet data gateway node PDGN are connected to the mobile switching center (MSC), and the packet switching data is established by performing the positioning of the mobile data terminal at the mobile switching center (MSC). The gateway node PDGN does not need to be directly connected to the visitor location register / home location register (VLR / HLR).

In addition, even if one packet data gateway node (PDGN) is connected to a plurality of mobile switching centers (MSC) or a plurality of packet data gateway nodes (PDGN) is connected to one mobile switching center (MSC), the network can be easily operated. have.

When any wired subscriber of the Internet network 300 calls a mobile data terminal, the mobile data terminal is called only with a supplementary mobile identification number (SMIN) for data allocated from the system network. (PDGN) is a subnetwork representing a data network to which data terminals with SMIN belong or is recognized as a packet network node. PDGN has a packet data gateway node (PDGN) having a sub network address represented by its SMIN address. ) Is connected to the mobile switching center (MSC) becomes the home network for data.

In the configuration of the system network proposed in the embodiment of the present invention, since the SMIN is simultaneously managed by the visitor location register / home location register (VLR / HLR) in which the basic identifier MIN (Mobile Identification Number) of the terminal is registered, the home network for data and voice And home networks for multimedia services are always the same.

In the embodiment of the present invention, the wireless data service considered in the mobile communication system 200 is based on the Internet access and X.25 packet network interworking access service to provide various application services available in the wired network in the same way in the wireless network. .

Therefore, the mobile terminal must have a terminal identifier for a circuit-switched call connection and a data terminal identifier for interworking call connection with an existing Internet packet network, which are expected to be used for basic voice calls and multimedia communication services. That is, a terminal identifier MIN (mobile identification number) applied in a conventional circuit-switched network is assigned as a basic terminal identifier, and an additional identifier SMIN (SUPPLEMENTARY MOBILE IDENTIFICATION) for data of the terminal is assigned to an Internet IP address or a packet address of an X.25 packet network. NUMBER) can be assigned as an option.

Based on this, the basic service functions of the network for providing various wireless data services can be summarized as follows.

Internet / Packet Network Access Service

By remotely calling and connecting the Internet and a packet data communication network from a mobile data terminal, a service of a category for connecting a database of an Internet server and a packet network host computer is provided. This service function is possible by providing a dial-up PPP service function in a wired network and a wireless data transfer function and a gateway function corresponding to a packet assembly de-assembly (PAD) service function. Do.

Since such a service is a terminal calling a host or server in a data network, a temporary IP address can be allocated and a call can be made, and a unique SMIN IP address is not required.

Internet protocol service of mobile terminal

Even when the mobile data terminal moves, the mobile terminal has a SMIN IP address, which is a unique data terminal identifier, and provides a function of accessing a server by using the Internet and using various application services. In addition, the mobile data terminal can be used as a host, so that an Internet user can call the terminal SMIN IP address, which is permanently assigned, to receive an application service. This service function is possible because the IMT-2000 mobile communication system 200 provides a function for supporting IP mobility of the mobile terminal.

Mobile terminal packet service

The two types of services are data communication between the mobile data terminal and the fixed data terminal. When the actual wireless data communication and the IMT-2000 mobile communication service are activated, wireless data communication between mobile data terminals is inevitably required. In order to support effectively, data communication protocol between terminals should be supported.

In case of data communication call between terminals, SMIN should be used. If packet switching is used instead of circuit switching, the base station can increase the wireless subscriber acceptance efficiency.

Hereinafter, operations of a signaling protocol and a data protocol according to an embodiment of the present invention will be described with reference to FIGS. 3 to 5.

3 is a diagram illustrating a protocol stack configuration of a packet root control signal according to the present invention.

Referring to FIG. 3, the signal protocol for controlling the route of Internet / packet data in the network interworking configuration shown in FIG. 2 may be configured as shown in FIG. 3. The connection between the packet data gateway node (PDGN) and the Internet / packet network can be made according to the situation such as Ethernet, frame relay, and x.25, and the connection between the packet data gateway node (PDGN) and the mobile switching center (MSC) Connect to the User Network Interface (UN) of B-ISDN. The RNC / MSC element shown in FIG. 3 is omitted from the base station on the RNC side, since the radio packet control between the mobile terminal MT and the radio access network is assumed to be performed in the mobile terminal MT and the RNC.

The signaling method between the packet data gateway node (PDGN) and the mobile switching center (MSC) becomes UNI and Q.2931 is used.If the user data does not exist for a specific time without a call release, the radio section And a circuit release function of Dormant state to efficiently use resources of a mobile switching center (MSC), and add a call identifier identification function using an SMIN number for an incoming call of an Internet / packet network originating mobile data terminal. .

The packet control protocol RPKTS (Radio Packet Signaling) in the wireless section performs the functions of the Packet Service Control Agent Function (PSCAF) of the terminal and the Packet Service Control Function (PSCF) of the RNC. see. In FIG. 3, the MT / UDT application interface (AI) is used for a user's Internet / packet access service by dial-up method, and subscribers without a unique SMIN access the AI of the packet data gateway node (PDGN). It is necessary layer in order to support internet and packet network access.

In FIG. 3, the APPL layer of MT / UDT may be an internet application service or a packet application layer. When accessing an Internet IP or packet host from a mobile data terminal having a SMIN, an already registered service is called between transport layers. The call is determined to be connected to the packet data gateway node PDGN. Conversely, APPL of the Internet / PPDN network 300 of FIG. 3 can be understood as an element when a user of a wired network calls an SMIN data address assigned to a mobile data terminal.

The RNC and the mobile switching center (MSC) update the routing table during handoff and roaming to ensure the path of the packet data gateway node (PDGN) and the mobile data terminal. When a roaming mobile data terminal wants to access the Internet / packet network, when dial-up access is made, it is connected through the packet data gateway node (PDGN) of the visited network, but when using the SMIN of the terminal, the mobile switching center of the visiting network It can be accessed through the packet data gateway node (PDGN) of the home network via the MSC and the mobile switching center (MSC) of the home network. Wireless data communication calls and connections between mobile data terminals are possible by calling SMIN or MIN using the APPL or AI of the MT / UDT of FIG. Here, the packet data gateway node (PDGN) is not involved, only the RNC and the mobile switching center (MSC), and the RNC and the mobile switching center (MSC) where the called terminal is located.

4 is a block diagram of an internet / packet data communication protocol stack according to the present invention. Referring to FIG. 4, when the serial communication path is established by the signal protocol described above, the data communication protocol between the mobile data terminal and the Internet server or the packet host is configured as shown in FIG. 4. Here, the elements of the mobile switching center (MSC) are not shown because only relay connections in the ATM layer. In addition, the packet data communication protocol between mobile data terminals is configured as shown in FIG.

As shown in FIG. 4, the Layer Layer is a RLP / MAC and ATM / AAL, the Link Layer is PPP, and the other higher layers are the Network Layer. It is located as a transport layer. The network layer may vary depending on the contents of the user service. In case of internet connection using SMIN and wireless X.25 terminal type connection, Network Layer of Packet Data Gateway Node (PDGN) does not use relay function but operates as Network Layer and Peer Part of MT / UDT.

Point to oint Internet Protocol (PPP) refers to the method used for RFC 1661 serial link communication, such as communication between a mobile data terminal and a packet data gateway node (PDGN) or between a mobile data terminal and the IMT-2000 network. The data communication in the network is a serial communication using a point-to-point single-path method that is different from the communication between terminals in a LAN or packet switched network, so it is determined to be optimal as a link layer protocol for connecting both ends of the link. do. In addition, PCP uses the PPP Internet Protocol Control Protocol (IPCP), which performs IP allocation in a dial-up method, and combines the PPP Link Control Protocol (LCP) with the link layer configuration between the mobile data terminal and the packet data gateway node (PDGN). By using it, PPI becomes an appropriate protocol.

In Figure 5, the ATM Adaption Layer (AAL) that delivers the PPI frame can be implemented as an error correction function, etc. in the upper layer, so that a retransmission function or an error correction function is not required, but the corresponding radio link protocol layer (RLP) of the radio section is performed. ) Has a retransmission function, it would be more effective to adopt a method that has a flow control function to effectively perform buffer management in the event of a frame error in the radio section.

Packet data communication between the mobile data terminals of FIG. 5 enables data communication by operating a peer protocol layer corresponding to each other around a mobile switching center (MSC). The Phi Phi lower layer performs the function of connecting the end-to-end data link, and the Phi Phi upper layer is divided into the functions of performing flow control and error correction and supporting application services.

According to the present invention as described above, in a system for a conventional Internet / packet network connection, the packet data serving node (PDSN) is removed and the packet data gateway node (PDGN) is connected to a mobile switching center (MSC) so that a signal link and a packet can be obtained. It provides a system network for internet / packet network access that minimizes other network interworking lines for data.

In addition, by providing the basic wireless data access service of the packet service between the mobile terminal, the Internet protocol service of the mobile terminal, the Internet / packet network access service, the user can use all kinds of data communication application services currently provided by the wired network The effect of providing mobility of wireless communication is further obtained.

Claims (9)

A plurality of wireless network controllers (RNCs), mobile switching centers (MSCs) connected to the wireless network controllers, visitor location registers / home location registers respectively connected to the mobile switching centers, packet data gateway nodes (PDGNs), and public wired communications networks And a mobile communication network and an internet network connected to a packet data gateway node (PDGN), wherein a data path between any data terminal and the packet data gateway node (PDGN) is provided with a connection of a serial communication line, and the packet An incoming call of a mobile data terminal arriving at a data gateway node (PDGN) is connected to the mobile switching center (MSC). 2. The method of claim 1, wherein when an incoming call of a mobile data terminal arriving at the packet data gateway node PDGN is connected to the MSC, the MSC performs positioning of the mobile data terminal. A system network for internet / packet network access characterized by establishing a packet path. The method of claim 1, characterized in that the one packet data gateway node (PDGN) is connected to a plurality of mobile switching centers (MSC) or the plurality of packet data gateway nodes (PDGN) is connected to one mobile switching center (MSC). System network for Internet / packet network access. The mobile data terminal of claim 1, wherein when any wired subscriber of the Internet network calls any mobile data terminal, the mobile data terminal is called only with an additional identifier (SMIN) number for data of the data terminal assigned in the system network. A system network for internet / packet network access. The method of claim 1, A system network for accessing an internet / packet network, wherein a visitor location register / home location register (VLR / HLR) registered with a terminal basic MIN number of a terminal simultaneously manages an additional identifier (SMIN) number for data. The Internet / packet network of a category according to claim 1, wherein the Internet / packet data communication network is remotely called from any mobile data terminal and connected to a database of an Internet server and a packet network host computer provided to the Internet or packet data communication network. A system network for internet / packet network access, characterized by executing an access service. The mobile terminal according to claim 1, wherein any mobile data terminal has an Internet Protocol (IP) address for a unique data terminal identifier number even while moving, and calls the Internet network to connect a server and use various application services. A system network for internet / packet network access characterized by executing a protocol service. 8. The Internet service according to claim 7, wherein the mobile data terminal is also available as a host, and the Internet network user is provided with an application service by calling an Internet Protocol (IP) address for additional identifiers of data of the assigned terminal. System network for packet network access. The Internet / packet network connection as claimed in claim 1, wherein the data communication call between the mobile terminals uses an additional identifier number for the data of the assigned terminal, and performs packet service between mobile terminals using a packet switching scheme. System network for business.