KR100565293B1 - IP data transmission method of mobile communication system - Google Patents

Abstract

The present invention relates to an IP data transmission method of a mobile communication system, and in performing MT (Mobile Terminated) data service of a mobile communication terminal using a general packet radio service (GPRS) network, to each user terminal using the same operator service. Assigning a fixed private IP, mapping the private IP with each subscriber identifier (MSISDN, IMSI, etc.) and storing it in a predetermined database; When one terminal MS_B to which the fixed private IP is assigned is to transmit a data packet (PDP PDU) to an IP of another terminal MS_A, a purpose of an IP packet in the PDP PDU in a GPRS Gateway Support Node (GGSN) Analyzing the IP; If the analyzed target IP is a private IP and the subscriber MS_A assigned the corresponding private IP exists in the mapping table of the database, activating the PDP context to the subscriber MS_A to transmit the PDP PDUs between the terminals. It can be achieved by including.

Description

IP data transmission method of mobile communication system {IP DATA TRANSMISSION METHOD FOR MOBILE COMMUNICATION SYSTEM}

1 is a conceptual diagram showing an IP data transmission method performed by being assigned a conventional public IP.

2 is a conceptual diagram illustrating a method of transmitting IP data between subscribers of the same service provider and an external service provider according to the present invention.

3 is a flowchart illustrating a method of transmitting IP data between users of the same service provider according to the present invention.

4 is a flowchart illustrating a method of transmitting IP data between users of another service provider according to the present invention.

The present invention relates to a method of transmitting IP data in a mobile communication system, and in particular, in a general packet radio service (GPRS) network, which is a wireless platform providing a mobile communication data service, fixed to each terminal (MS) subscribed to a data service. After assigning a private IP and associating it with a subscriber identifier (MSISDN, IMSI, etc.), referring to the IP header of the data to be transmitted, the data is transmitted between users inside the service provider using the private IP, and authorized between the service providers externally. The present invention relates to an IP data transmission method of a mobile communication system that allocates IP and transmits data.

In general, GPRS is a solution that provides high-speed Internet service in an asynchronous IMT-2000 network, and is composed of a Packet Gateway Switching Device (GGSN) and a Serving GPRS Support Node (SGSN).

Here, SGSN provides a data service processing function similar to an exchanger for providing a voice service, and GGSN provides a function that allows access to an adjacent Internet to enable a mobile subscriber to use a high speed and high quality internet service. SGSN and GGSN are systems for providing high-speed Internet service to mobile subscribers in asynchronous IMT-2000 network, which is capable of providing high-speed multimedia service to subscribers away from existing simple text type internet service. Internet solution.

Therefore, a terminal intending to use an IP data service by accessing a GPRS network must be assigned a public IP from the network. Currently, the terminal IP allocation is performed in a GPRS Gateway Support Node (GGSN) in the GPRS network. The allocation scheme is a method of pre-assigning a static IP to the terminal, and assigning a specific IP as necessary to the terminal after the data service is completed. The method of reallocating the corresponding IP and the dynamic method of allocating a specific IP as necessary and then reclaiming the IP for the terminal which has completed data service are used.

Therefore, in the conventional case, in order to transmit IP data between each terminal (including terminals of the same service provider), each of the fixed public IP addresses must be allocated as shown in FIG. 1.

However, since IPv4 (IP version 4) addresses, which are widely used at present, are already being used in a considerable amount and suffer from address shortages, most operators use dynamic allocation. However, in this dynamic allocation method, since the same IP is not always assigned to the user and may be differently assigned every time of access, the user of the external IP network cannot uniquely identify a specific user terminal, and the user has MT (Mobile Terminated) data. The service will be unavailable.

Accordingly, the present invention has been created to solve the above-mentioned conventional problems, in the GPRS network, which is a wireless platform providing a mobile communication data service, allocates a fixed private IP to each terminal subscribed to the data service and After associating with the subscriber identifier, referring to the IP header of the data to be transmitted, the mobile communication system transmits the data between the internal users of the service provider using the private IP and allocates the public IP between the external users of the service provider to transmit the data. Its purpose is to provide an IP data transmission method of the.

The present invention for achieving the above object, in performing a MT (Mobile Terminated) data service of a mobile communication terminal using a General Packet Radio Service (GPRS) network, a fixed private IP to each user terminal using the same operator service Assigning and mapping the private IP with each subscriber identifier (MSISDN, IMSI, etc.) and storing it in a predetermined database; When one terminal MS_B to which the fixed private IP is assigned is to transmit a data packet (PDP PDU) to an IP of another terminal MS_A, a purpose of an IP packet in the PDP PDU in a GPRS Gateway Support Node (GGSN) Analyzing the IP; If the analyzed target IP is a private IP and the subscriber MS_A assigned the corresponding private IP exists in the mapping table of the database, activating the PDP context to the subscriber MS_A to transmit the PDP PDUs between the terminals. Characterized in that comprises a.

The present invention is a method for solving the problem that the use of the MT data service due to dynamic IP allocation due to the inability to assign the public IP to all conventional terminals, fixedly allocated private IP between users of the same service provider By linking the assigned private IP with each subscriber identifier (MSISDN, IMSI, etc.) at a specific database server, it is possible to receive data service from users of the same service provider at any time. It is a main point of the present invention to provide a method for transmitting data by allocating a public IP between users.

For reference, public IP is a uniquely distinguished IP address worldwide, which means a commonly used IP address, and cannot be used in duplicate. Private IP is assigned internally by an enterprise or organization due to lack of IPv4 address and security reasons. As an IP address area used as a private address, an address to which a private IP is assigned cannot be leaked outside the corresponding company or organization, and the private IP area is not known even from the external IP network. Therefore, the private IP address is used only in a specific company / organization, so it may be used repeatedly.

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

FIG. 2 is a conceptual diagram of a method of transmitting IP data between subscribers of an identical service provider and an external service provider according to the present invention, in which a terminal MS_B having a fixed private IP uses IP data of another terminal MS_A using the same operator service. When transmitting a data packet, the GGSN is a subscriber whose destination IP (Destination IP) of the IP packet in the received Packet Data Protocol (PDP) Protocol Data Unit (PDU) is a private IP and the corresponding private IP is assigned to the mapping table. If there exists, a procedure for creating a PDP context to the subscriber is performed.

That is, as shown in FIG. 3, the transmitting terminal MS_B first requests a PDP context to the GGSN (GPRS data session request and fixed private IP use request). In response, GGSN allows PDP contexts (allowing GPRS data session creation and use of fixed private IP).

Accordingly, the transmitting terminal MS_B transmits the PDP PDU (including the IP packet) to the counterpart terminal MS_A, and the destination IP of the IP packet included in the received PDP PDU in the GGSN is the private IP and corresponds to the mapping table. If there is a subscriber assigned with a private IP, a procedure for creating a PDP context to the corresponding subscriber is performed to activate the PDP context to the counterpart MS_A and transmit / receive PDP PDUs between the terminals (IP Not just sending packets separately).

On the other hand, if the other terminal is not a subscriber of the same service provider (if private IP is not available), the other terminal must use a public IP (Public IP) to transmit packet data, and the operator must In order to transmit packet data, as in the prior art, the transmitting terminal must be assigned a dynamic IP.

That is, as shown in FIG. 4, the transmitting terminal MS_B requests the PDP context from the GGSN (GPRS data session request and floating public IP allocation request). In response, the GGSN allows the PDP context (GPRS data session creation and public IP assignment).

Accordingly, the transmitting terminal MS_B transmits the PDP PDU (including the IP packet) to the counterpart MS_A. In the GGSN, the destination IP of the IP packet included in the PDP PDU is a public IP and the public IP is outside the operator. In the case of the IP network, only the IP packet in the PDP PDU is extracted and transmitted to the external data network. Similarly, the IP packet received from the external network is transmitted to the transmission terminal MS_B in the reverse process.

As described above, the present invention fixedly allocates private IPs to subscribers in each service provider in order to solve the dynamic IP allocation problem and insufficient fixed public IP, and assigns the allocated private IPs to each subscriber's number (MSISDN). By associating with a specific database server (eg GGSN, HLR), the service provider can remove the burden of obtaining additional public IPv4 address, and the data service subscriber can receive data service at any time from users of the same service provider. To enable the MT data service.

In other words, for conventional MT data service, a fixed public IP is allocated to each terminal and an internal / external IP network uses a fixed public IP assigned to the terminal as a destination IP address to transmit data to the corresponding terminal. Had to forward the packet. However, as described above, many subscribers cannot be accommodated due to the lack of public IP, and service subscribers also have inevitably paid additional services.

However, the present invention enables the packet data transmission / reception between subscribers of the same operator even if the terminal does not use the public IP, and the packet data transmission / reception with the subscriber using the external IP network of the operator allocates a floating public IP. In other words, by providing a mobile-Ogiginated (MO) data service that is currently universally used without the need for additional public IP, by providing a mobile-terminated (MT) data service between subscribers within the same provider, New services and revenue streams can be created while reducing the additional cost of subscribers.

As described above, the IP data transmission method of the mobile communication system of the present invention allocates a fixed private IP to each terminal subscribing to the data service in a GPRS network, which is a wireless platform providing a mobile communication data service, and assigns it to a subscriber identifier. After linking with the server, referring to the IP header of the data to be transmitted, data may be transmitted between users of the service provider using a private IP, and data may be transmitted by allocating a public IP between the service providers.

Claims (3)

In performing MT (Mobile Terminated) data service of a mobile communication terminal using a General Packet Radio Service (GPRS) network, Assigning a fixed private IP to each user terminal using the same operator service, mapping the fixed private IP with each subscriber identifier, and storing the fixed private IP in a predetermined database; When one terminal MS_B to which the fixed private IP is assigned is to transmit a data packet (PDP PDU) to a fixed private IP of another terminal MS_A, an IP packet in the PDP PDU is used by a GPRS Gateway Support Node (GGSN). Analyzing the destination IP of the; If the analyzed target IP is a fixed private IP and the subscriber MS_A assigned to the fixed private IP exists in the mapping table of the database, the PDP context to the corresponding subscriber MS_A is activated to transmit the PDP PDUs between the terminals. IP data transmission method of a mobile communication system, comprising the step of. The IP of the mobile communication system according to claim 1, wherein the database which maps and stores the fixed private IP with each subscriber identifier is managed through a GPRS Gateway Support Node (GGSN) or a Home Location Register (HLR) server. Data transfer method. The method of claim 2, wherein the subscriber identifier is, A method of transmitting IP data in a mobile communication system, comprising a MSISDN (Moile Station International Subscriber Directory Number) or an IMSI (International Mobile Subscriber Identity).

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