KR100724749B1 - Apparatus and Method of Providing Packet Service in mobile communication system - Google Patents

Abstract

The present invention relates to a method and apparatus for providing a packet service of a mobile communication system. In the mixed network of a Pv4 network and an IPv6 network, the present invention provides a packet service by simply adding a simple service option without changing each equipment or system of the mobile communication system. The interface ID information allocated when the IPv4 terminal accesses the IPv6 network is allocated based on the subscriber information.

Description

Method and apparatus for providing packet service in mobile communication system {Apparatus and Method of Providing Packet Service in mobile communication system}

1 is a view for explaining a method for providing a packet service through tunneling in a general mobile communication system IPv4 / IPv6 integrated network.

2A is a diagram for explaining an IPv6 packet.

2B is a diagram for explaining a packet to which an IPv4 header is added.

3 is a diagram for explaining that a mobile communication system provides an IPv6 packet service in an IPv6 network.

4 is a diagram illustrating a mobile communication system for providing a packet service according to a preferred embodiment of the present invention.

5 is a flowchart illustrating a packet service providing method according to an exemplary embodiment of the present invention.

6 is a diagram briefly illustrating a process of connecting between network layers.

7 is a flowchart for explaining a method for providing a packet service according to a preferred embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

100-1: IPv4 (Internet Protocol Version 4) terminal

100-2: IPv6 (Internet Protocol Version 6) terminal

110: BTS (Base Station Transceiver System)

120: base station

130: IPv4 PDSN (Packet Data Serving Node)

140: IPv6 PDSN

151, 152: Router 160: IPv4 application server

170: IPv6 application server

The present invention relates to a method and apparatus for providing a packet service of a mobile communication system. More particularly, the present invention relates to a method of providing a packet service in an integrated network of an IPv4 network and an IPv6 network. A packet service providing method and apparatus therefor.

The Internet is becoming a core infrastructure of the information society, and due to the development of high-quality services in real time, such as VoIP (Voice of IP) and Internet TV, and the development of ALL-IP technology, the traffic exchanged through the Internet is also textual information. There is a trend that changes from the traffic including the multimedia traffic including the voice information, image information and video information, the amount of traffic is exploding.

Such multimedia traffic has a feature that is greatly affected by transmission delay or jitter generated on the network.

Currently established Internet Protocol Version 4 (IPv4) based Internet uses small address information and complex header structure to accommodate the rapidly increasing host and multimedia traffic. There is a problem that the delay decreases the performance of the entire Internet.

The proposed Internet Protocol Version 6 (IPv6) to solve the problems of IPv4 based Internet has features such as 128-bit extended address system, simplified header structure, improved QoS and enhanced security.

However, since the current Internet is constructed and widely used as the IPv4 network, it is impossible to switch to the IPv6 network at one time. Therefore, the IPv4 network and the IPv6 network will coexist gradually for the time being.

Therefore, in order to successfully build an IPv6 network, it is important to efficiently introduce an IPv6 host or router while maintaining the IPv4 hosts and routers of the existing IPv4 network.

Therefore, in order to efficiently accommodate the sudden increase in traffic, it is essential to establish an Internet infrastructure that can provide QoS required for each traffic to traffic having different characteristics such as voice, video, and data. In a mixed IPv4 / IPv6 network, there is a need to define a model that can provide end-to-end QoS for multimedia traffic.

The method of processing packets in a mixed IPv4 / IPv6 integrated network with IPv4 hosts and routers and IPv6 hosts and routers, designed by the Internet Engineering Task Force (IETF), uses a dual stack, header conversion. (header translation) method, tunneling method and the like have been proposed.

Using a dual stack means that all hosts and routers have a dual stack protocol before completely moving to an IPv6 network. In other words, IPv4 and IPv6 can be operated simultaneously until all systems on the Internet use IPv6.

The header translation method is useful if most of the Internet uses IPv6, but some systems still use IPv4. That is, when the sender wants to use IPv6 but the receiver does not understand IPv6, the sender converts the header of the IPv6 packet into the IPv4 header and transmits it.

The tunneling method is used when two computers using IPv6 try to communicate with each other and have to traverse an area using IPv4. That is, a method of encapsulating an IPv6 packet in an IPv4 packet when the IPv6 packet enters an IPv4 using area and then decapsulating the IPv6 packet when leaving the IPv4 area.

In addition, it should be able to receive IPv6 service in CDMA access network which is mobile communication network based on ALL-IP.

FIG. 1 is a diagram illustrating a method of providing a packet service through tunneling in a general IPv4 / IPv6 integrated network.

Referring to FIG. 1, a mobile communication system providing a packet service includes an IPv4 / IPv6 terminal 10 having both an IPv4 stack and an IPv6 stack, an IPv4 / IPv6 terminal 10, and a code division multiple access (CDMA) network. Base Station Transceiver System (BTS) 11 to connect to the base station, Base Station 12 to establish a CDMA Point-to-Point Protocol (PPP) session with the IPv4 / IPv6 terminal 10, and IPv4 / IPv6 PDSN 13 (Packet Data Serving Noded) providing packet data for packet service to the terminal 10, a plurality of routers 14 and 15 for routing packets, and an IPv6 application server providing IPv6 packet service. 16, the base station 12 includes a BSC controlling the BTS 11 and a Packet Control Function (PCF) controlling the transmission of packets.

The case where the base station 12 and the plurality of PDSNs 13 are IPv4 based packet networks, and the IPv4 / IPv6 terminal 10 receives the IPv6 packet service from the IPv6 application server 16 will be described.

In addition, an access network for allowing the IPv4 / IPv6 terminal 10 to access the IP network in a network including the IPv4 / IPv6 terminal 10, the BTS 11, the base station 12, and the PDSN 13 Network).

The IPv4 / IPv6 terminal 10 sets the CDMA PPP with the PDSN 13 based on the IPv4 (S 10). That is, the IPv4 / IPv6 terminal 10 establishes a CDMA PPP session with the PDSN 13 through the base station 12 after establishing a radio link with the BTS 11 according to a user's selection.

When the CDMA PPP session is established with the PDSN 13, the IPv4 / IPv6 terminal 10 transmits an IPv6 packet to the PDSN 13.

FIG. 2A illustrates an IPv6 packet. As shown in FIG. 2A, the IPv6 header of an IPv6 packet includes 2001: 2BB: X, which is a 128-bit destination address (D), and 2002: AB, which is a source address (S). :: AB: CD is included.

After checking the IPv6 destination address (D) of the IPv6 header received in the CDMA PPP session, the PDSN 13 encapsulates the IPv4 header including the IPv4 address corresponding to the IPv6 address, and transmits it to the relay router 15 of the IPv6 network. do.

That is, the PDSN 13 tunnels the received IPv6 packet in the IPv4 network and transmits the received IPv6 packet to the IPv6 network (S 11).

FIG. 2B is a diagram illustrating a packet to which an IPv4 header is added, and as illustrated in FIG. 2B, an IPv4 destination address D ′ and an IPv4 source address corresponding to an IPv6 destination address D and an IPv6 source address S. After adding the IPv4 header including (S '), it transmits to the relay router 15 of the IPv6 network.

Then, the relay router 15 decapsulates the IPv4 header of the received packet and transmits it to the IPv6 application server 16 according to the IPv6 destination address D.

The IPv6 application server 16 provides an IPv6 packet service to the IPv4 / IPv6 terminal 10 according to the received IPv6 packet (S 12). That is, the IPv4 / IPv6 terminal 10 accesses the IPv6 application server 16 and provides IPv6 packet service to the user.

This general tunneling scheme has an advantage in that IPv6 packet service can be provided by replacing only the relay router 15 and the IPv6 application server 16, but the PDSN (IPSN) in which the IPv4 / IPv6 terminal 10 is included in the IPv4 network is used. 13) and tunneling with the relay router 15 for transmitting the IPv6 packet again after establishing the CDMA PPP session, the connection procedure for providing the IPv6 packet service is complicated.

In addition, since the IPv4 header must be encapsulated in all IPv6 packets for transmitting traffic for providing IPv6 packet service, the packet overhead is increased, and radio resource usage efficiency between the IPv4 / IPv6 terminal 10 and the BTS 11 is increased. Degrades.

3 is a diagram for explaining that a mobile communication system provides an IPv6 packet service in an IPv6 network.

Referring to FIG. 3, an IPv6 terminal 20 having an IPv6 stack, a BTS 21 for establishing a radio link with an IPv6 terminal 20, a base station 22 connected with an IPv6 terminal 20 and a CDMA network, And a plurality of PDSNs 23 for establishing a CDMA PPP session with the IPv6 terminal 20, a plurality of routers 24 for routing packets, and an IPv6 application server 25 for providing IPv6 packet services.

The PDSN 23, multiple routers 24, and IPv6 application services are included in the IPv6 network. That is, the PDSN 23 and each of the routers 24 are replaced with a device having an IPv6 stack, or are replaced or upgraded with a device having both an IPv4 / IPv6 stack and included in an IPv6 network.

The IPv6 terminal 20 establishes a CDMA PPP session with the PDSN 23 (S20). Then, the IPv6 terminal 20 accesses the IPv6 application server 25 through the PDSN 23 of the IPv6 network and each router 24, and provides IPv6 packet service (S 21).

That is, when the IPv6 terminal 20 establishes a CDMA PPP session with the PDSN 23, the PCF randomly selects among the PDSNs 23 in the IPv6 network, and connects the PPP link to the selected PDSN 23 after IPv6. The packet is transmitted, and the PDSN 23 transmits the IPv6 packet to the IPv6 application server 25 through each router 24 in the IPv6 network.

However, such a scheme requires upgrading the IPv6 stack in the PDSN 23 and all the routers 24, or replacing the equipment itself with the IPv6 stack equipment, which is expensive and inefficient routing with the IPv4 network.

Accordingly, the present invention has been made to solve the above problems, and provides a packet service without changing each equipment or system of the mobile communication system in a mixed network of IPv4 network and IPv6 network, and the IPv4 terminal is IPv6 network It is an object of the present invention to provide a method and apparatus for providing a packet service of a mobile communication system for facilitating management of a terminal by allocating interface ID information to be allocated when accessing the terminal based on subscriber information.

A mobile communication system according to an aspect of the present invention for achieving the above object, the base station for establishing a link to at least one terminal and establishing a session for each terminal by selecting a PDSN according to the service option received from each terminal ( Base station).

In addition, when the base station of the mobile communication system according to the present invention receives an IPv6 service option through a service negotiation procedure with each terminal, a base station establishes a session between an IPv6 PDSN belonging to an IPv6 network and each terminal, and performs a service negotiation procedure with each terminal. If the IPv6 service option is not received through the UE, a session between the terminal and each IPv4 PDSN belonging to the IPv4 network is established.

According to another aspect of the present invention, a mobile communication system including at least one PDSN includes at least one terminal for establishing a session with the PDSN according to a user's selection, and if each terminal for which the session is established is an IPv4 terminal, a subscriber of the terminal. It generates a PDSN according to the information, and includes a PDSN assigned to each terminal.

According to another aspect of the present invention, a packet service providing method of a mobile communication system in an integrated IPv4 / IPv6 network includes at least one terminal setting a service option and a base station establishing a link through a service negotiation procedure with each terminal. And determining, by the base station, a service option to establish a session between the IPv6 PDSN and each terminal, and providing a packet service by exchanging packets between the terminal and the IPv6 application server.

In the step of establishing a session of the packet service providing method of the mobile communication system according to the present invention, the base station checks the service option of each terminal, a) if the IPv6 service option is set, and establishes a link with the IPv6 PDSN, b ) If the IPv6 service option is not set, establishing a link with an IPv4 PDSN.

In addition, the packet service providing method of the mobile communication system according to the present invention, if the IPv6 PDSN session is established, transmitting the prefix information, and if the IP address of the terminal is an IPv4 address, checking the subscriber information of the terminal And generating interface ID information according to the subscriber information and transmitting the generated interface ID information to the terminal.

In addition, the packet service providing method of the mobile communication system according to the present invention, the terminal generating the IPv6 local address using the interface ID information and the prefix information received from the PDSN, using the interface ID information and the prefix information Generating a global IPv6 address.

According to another aspect of the present invention, there is provided a method for allocating an IPv4 / IPv6 integrated network, in which a PDSN belonging to an IPv6 network establishes a session with at least one terminal, and transmits prefix information to each terminal through the established session. And checking the subscriber information of the terminal, and generating and transmitting interface ID information according to the subscriber information to the terminal.

According to the present invention, there is provided a method for allocating an IPv4 / IPv6 integrated network, including: generating, by a terminal, an IPv6 local address using interface ID information and prefix information received from a PDSN, using interface ID information, and prefix information. Generating a global IPv6 address.

Hereinafter, a method and apparatus for providing a packet service in a mobile communication system according to the present invention will be described in detail with reference to the accompanying drawings.

4 is a view for explaining a mobile communication system for providing a packet service according to a preferred embodiment of the present invention.

4, an IPv4 terminal 100-1 supporting an IPv4 stack, an IPv6 terminal 100-2 supporting an IPv6 stack, a BTS 110 for establishing a radio link with each terminal, and each terminal Base station 120 for transmitting packets to corresponding PDSNs 130 and 140 according to the service option received from 100, a plurality of PDSNs 150 for transmitting packets received from base station 120 to a destination, and IPv4 An IPv4 application server 160 providing a packet service and an IPv6 application server 170 providing an IPv6 packet service are included.

In addition, an access network for allowing each terminal 100 to access an IP network includes a network including each terminal 100, a BTS 110, a base station 120, and PDSNs 130 and 140. It is called.

The IPv4 terminal 100-1 refers to a terminal providing a packet service through an already established IPv4 network, and the IPv6 terminal 100-2 refers to a terminal providing a packet service through a newly constructed IPv6 network.

First, the case where the IPv6 network is introduced in the state where the IPv4 network is constructed, and the size of the IPv4 network is larger than that of the IPv6 network will be described.

When the user requests an IPv6 packet service, the IPv6 terminal 100-2 sets an IPv6 service option indicating that the IPv6 packet service is a service option exchanged while establishing a wireless link with the base station 120.

If the IPv6 service option is set from the IPv6 terminal 100-2, the base station 120 establishes a link with the IPv6 PDSN 140 included in the IPv6 network. That is, a CDMA PPP session is established between the IPv6 terminal 100-2 and the IPv6 PDSN 140.

When the base station 120 exchanges service option information with the IPv6 terminal 100-2 and establishes a radio link, it notifies the radio resource allocation to the IPv6 PDSN 140, selects a PCF to provide packet service, and selects radio resource information. Transfer to PCF.

The PCF selects the PDSN 140 based on the received service option information and the IPv6 terminal 100-2 information and establishes a link with the corresponding PDSN 140. That is, the base station 120 selects the IPv6 PDSN 140 according to the subscriber information of the IPv6 terminal 100-2 and the IPv6 service option among the service options.

The IPv6 PDSN 140 transmits the received IPv6 packet to the IPv6 application server 170, and transmits the IPv6 packet received from the IPv6 application server 170 to the IPv6 terminal 100-2 through the CDMA PPP session, thereby transmitting IPv6 packet. Provide packet services.

Meanwhile, the base station 120 establishes a radio link after exchanging service options with the IPv4 terminal 100-1, and the PCF establishes an IPv4 network based on the received service option information and the IPv4 terminal 100-1 related information. The IPv4 PDSN 130 included in the link is selected to establish a link.

That is, the base station 120 establishes a link with the IPv6 PDSN 140 if there is an IPv6 service option among service options exchanged while establishing a radio link with each terminal 100, and if there is no IPv6 service option, the IPv4 PDSN 130. ) And the link.

In addition, the BTS 110 transmits the packet received through the wireless link established with each terminal to the base station 120, and the base station 120 transmits the packet received from the BTS 110 through the corresponding link to the corresponding PDSN ( 130).

That is, by implementing the IPv6 service option addition function to the IPv6 terminal 100-2, and by implementing a simple function that can select the PDSN (130, 140) according to the service option to the base station 120, the IPv4 already established IPv4 packet service and IPv6 packet service through a network can be simultaneously provided.

On the other hand, the case where the IPv6 network scale becomes larger than the IPv4 network scale will be described.

That is, when the user requests the IPv4 packet service, the IPv4 terminal 100-1 sets an IPv4 service option that specifies that the IPv4 packet service is a service option exchanged while establishing a radio link with the base station 120.

If the IPv4 service option is set from the IPv4 terminal 100-1, the base station 120 establishes a link with the IPv4 PDSN 130 included in the IPv4 network. That is, a CDMA PPP session is established between the IPv4 terminal 100-1 and the IPv4 PDSN 130.

When the base station 120 exchanges service option information with the IPv4 terminal 100-1 and establishes a radio link, the base station 120 notifies the PDSN 130 of radio resource allocation, selects a PCF that provides packet service, and selects the radio resource information by the PCF. To send.

The PCF selects a PDSN based on the received service option information and the IPv4 terminal 100-1 information and establishes a link with the corresponding PDSN. That is, the base station 120 selects the IPv4 PDSN 130 according to the subscriber information of the IPv4 terminal 100-1 and the IPv4 service option among the service options.

The IPv4 PDSN 130 transmits the received IPv4 packet to the IPv4 application server 160, and transmits the IPv4 packet received from the IPv4 application server 160 to the IPv4 terminal 100-1 through a CDMA PPP session, thereby transmitting IPv4 packet. Provide packet services.

That is, even when the network develops and the size of the IPv6 network becomes larger than the size of the IPv4 network, the IPv4 service option may be implemented in the IPv4 terminal 100-1, and the PDSN may be selected according to the service option in the base station 120. By implementing the function, it is possible to simultaneously provide IPv4 packet service and IPv6 packet service through an IPv4 network.

In addition, when there is a packet service request from the IPv4 terminal 100-1, the IPv6 PDSN 140 allocates interface identification (ID) information based on subscriber information of the IPv4 terminal 100-1. That is, the IPv6 PDSN 140 does not allocate an IPv6 address according to the actual MAC address to the IPv4 terminal 100-1, but instead assigns an IPv6 address based on interface identification information based on subscriber information of the IPv4 terminal 100-1. Assign.

That is, the IPv6 PDSN 140 allocates subscriber information of the IPv4 terminal 100-1 and a 64-bit interface ID according to the intermediate address ff: fe, and the IPv4 terminal 100-1 allocates the assigned interface ID. Generate a 64-bit IPv6 address according to (64-bit) and prefix information (64-bit).

In this case, since the interface identification information is based on the subscriber information of the IPv4 terminal 100-1, even if the IPv4 terminal 100-1 accesses another PDSN, the interface ID of the IPv6 address is the subscriber information. -1), the IPv4 terminal 100-1 can be authenticated / managed according to the interface ID.

For example, if the IPv6 PDSN 140 has International Mobile System Identifier (IMSI) information, which is subscriber information of the IPv4 terminal 100-1, 450001080801000, an IEEE Extended Unique Identifier-64 (EUI-64) address based on the IMSI information. An interface ID such as 021080FFFE802207 is generated by the generation method.

The IPv6 PDSN 140 generates an EUI-64 bit address based on the interface ID and allocates the EUI-64 bit address to the IPv4 terminal 100-1 through a negotiation procedure with the IPv4 terminal 100-1.

5 is a flowchart illustrating a packet service providing method according to an exemplary embodiment of the present invention, and FIG. 6 is a diagram briefly illustrating a process of connecting between network layers.

5 to 6, a case in which the IPv6 terminal 100-2 requests an IPv6 packet service will be described. However, the case in which the IPv4 terminal 100-1 requests the IPv4 packet service is the same. Can be.

When the application program for providing the IPv6 packet service is started, the IPv6 terminal 100-2 sets an IPv6 service option (S 100), and accesses a CDMA network (Origin) (S 110).

That is, the IPv6 terminal 100-2 establishes a radio link with the base station 120, and the base station 120 transmits to the mobile switching center (MSC) 160 when the radio link is established with the IPv6 terminal 100-2. A service request is made (S 120).

When the IPv6 terminal 100-2 is initially connected, the MSC 160 makes an approval request for the IPv6 terminal 100-2 (S 130).

In this case, the IPv6 terminal 100-2 informs the base station 120 by using the IPv6 service option, and drives the PPPv6 protocol when using the CDMA PPP session.

In addition, when the grant request is received, the base station 120 allocates a channel to the IPv6 terminal 100-2 (S 140). That is, the base station 120 performs a channel allocation procedure for the IPv6 terminal 100-2.

The IPv6 terminal 100-2 is allocated a radio resource through a service negotiation procedure of exchanging service options (S 150). At this time, the IPv6 terminal 100-2 transmits the IPv6 service option to the base station 120 while exchanging service options.

When the service negotiation procedure for exchanging service options with the IPv6 terminal 100-2 is completed, the base station 120 transmits an assignment complete to the MSC 160 (S 160) and the IPv6 terminal 100-2. Set up a traffic channel for) (S 170).

The base station 120 determines whether there is an IPv6 service option among the service options received from the IPv6 terminal 100-2 (S180).

If the IPv6 service option is set, the base station 120 selects the IPv6 PDSN 140 in the IPv6 network and establishes a link (R-P interval link setting) (S 190).

At this time, the IPv6 PDSN 140 determines the subscriber information (IMSI information) of the IPv6 terminal 100-2 while establishing a link with the base station 120.

In addition, the IPv6 PDSN 140 establishes a CDMA PPP session with the IPv6 terminal 100-2 through a link control protocol (LCP) setting procedure (S200).

The IPv6 PDSN 140 performs a subscriber authentication procedure based on the subscriber information of the IPv6 terminal 100-2 (S210).

When the subscriber authentication procedure is completed, the IPv6 PDSN 140 transmits the packet received from the IPv6 terminal 100-2 to the IPv6 application server 170, and transmits the packet received from the IPv6 application server 170 to the IPv6 terminal 100. -2) to provide an IPv6 packet service (S240).

Meanwhile, when the IPv4 terminal 100-1 requests IPv6 packet service, the base station 120 checks whether there is an IPv6 service option among the service options (S 180), and if there is an IPv6 service option, the IPv6 PDSN 140. ) To set the link (S 190).

At this time, the IPv6 PDSN 140 transmits prefix (64-bit) information to the IPv4 terminal 100-2 when the CDMA PPP session is initially established with the IPv4 terminal 100-1 (S220).

That is, the IPv6 PDSN 140 does not periodically transmit the prefix information of the network to the IPv4 terminal 100-1, and when the initial CDMA PPP session is established, the IPv4 terminal 100-1 transmits the prefix information to the packet. It is possible to minimize the start time for receiving the service and to improve the efficiency of wire / wireless resource usage caused by periodically transmitting the prefix information.

The IPv6 PDSN 140 allocates an interface ID based on the subscriber information (IMSI) of the IPv4 terminal 100-1, and the IPv4 terminal 100-1 assigns an interface ID allocated from the IPv6 PDSN 140. IPv6 Link Local Address (e.g., FE80: 0219: 80FF: 2207) is set by using (S220). That is, the IPv4 terminal 100-1 sets an IPv6 local address through an IPv6 control point (CP) negotiation procedure.

The IPv4 terminal 100-1 generates a global IPv6 address using the prefix information received while establishing a CDMA PPP session from the IPv6 PDSN 140 and the assigned interface identification information (S 230).

The IPv4 terminal 100-1 transmits the packet to the IPv6 application server 170 using the IPv6 local address and the global IPv6 address, and provides a packet service according to the packet received from the IPv6 application server 170. (S 240).

When the subscriber authentication procedure is completed, the IPv6 PDSN 140 allocates interface identification information based on the subscriber information to the IPv4 terminal 100-1, and the IPv4 terminal 100-1 is allocated from the IPv6 PDSN 140. Using the interface identification information, an IPv6 link local address (for example, FE80: 0219: 80FF: 2207) is set (S220). That is, the IPv4 terminal 100-1 sets an IPv6 local address through an IPv6 control point (CP) negotiation procedure.

The IPv4 terminal 100-1 generates a global IPv6 address using the prefix information received while establishing a CDMA PPP session from the IPv6 PDSN 140 and the assigned interface identification information (S 230).

Here, the IPv6 link local address is an address used by the IPv4 terminal 100-1 in an IPv6 network, and a global IPv6 address is an address for the IPv4 terminal 100-1 to perform data communication with an external IPv6 network.

The IPv4 terminal 100-1 transmits the packet to the IPv6 application server 170 using the IPv6 local address and the global IPv6 address, and provides a packet service according to the packet received from the IPv6 application server 170. (S 240).

7 is a flowchart illustrating a method of providing a packet service according to an exemplary embodiment of the present invention.

Referring to FIG. 7, the base station 120 establishes a wireless link by performing a service negotiation procedure of exchanging service options with an IPv4 terminal 100-1 or an IPv6 terminal (S 300).

The base station 120 checks whether there is an IPv6 service option among the service options received from each terminal 100 in which a radio link is established (S 310).

If there is an IPv6 service option, the base station 120 establishes a CDMA PPP session between the IPv6 PDSN 140 belonging to the IPv6 network and each terminal 100 (S320).

On the other hand, if there is no IPv6 service option, the base station establishes a CDMA PPP session between the IPv4 PDSN 130 and each terminal 100 belonging to the IPv4 network.

The IPv6 PDSN 140 checks whether the terminal 100 on which the CDMA PPP session is established is the IPv4 terminal 100-1 (S330).

If the IPv6 PDSN 140 establishes a CDMA PPP session with the IPv4 terminal 100-1, the IPv6 PDSN 140 determines subscriber information of the IPv4 terminal 100-1 (S340).

The IPv6 PDSN 140 generates an interface ID (64-bit) based on IMSI information according to subscriber information of the IPv4 terminal 100-1, and assigns it to the IPv4 terminal 100-1 (S). 350).

The IPv4 terminal 100-1 sets an interface ID allocated from the IPv6 PDSN 140 and an IPv6 address of 128 bits according to the prefix information (64 bits) (S360).

In addition, the IPv4 terminal 100-1 accesses the IPv6 application server 170 through the set IPv6 address to receive an IPv6 packet service, and the IPv6 terminal 100-2 receives the IPv6 application server 170 through the assigned IPv6 address. ), And receives an IPv6 packet service (S370).

Although the present invention has been described in detail only with respect to the described embodiments, it will be apparent to those skilled in the art that various modifications and changes are possible within the technical spirit of the present invention, and such modifications and modifications belong to the appended claims.

As described above, according to the present invention, in a mixed network of an IPv4 network and an IPv6 network, a packet service can be provided by simply adding a simple service option without changing each device or system of the mobile communication system.

In addition, by allocating interface ID information allocated when an IPv4 terminal accesses an IPv6 network based on subscriber information, management of the terminal can be easily performed.

Claims (26)

In a mobile communication system, And a base station for establishing a link with at least one terminal and establishing a session with each terminal by selecting a PDSN according to a service option received from each terminal. According to claim 1, wherein each terminal, The mobile communication system, characterized in that for exchanging IPv6 service options with the base station through a service negotiation procedure according to the user's selection. The method of claim 1, wherein the base station, And receiving an IPv6 service option through the service negotiation procedure with each terminal, establishing a session between the terminal and an IPv6 PDSN belonging to an IPv6 network. The method of claim 1, wherein the base station, And if the IPv6 service option is not received through the service negotiation procedure with each terminal, establishing a session between the terminal and an IPv4 PDSN belonging to an IPv4 network. The method of claim 1, wherein the PDSN is, A mobile communication system, characterized in that one of the IPv4 PDSN belonging to the IPv4 network or the IPv6 PDSN belonging to the IPv6 network. According to claim 1, wherein each terminal, A mobile communication system, characterized in that either an IPv4 terminal having an IPv4 stack or an IPv6 terminal having an IPv6 stack. The method of claim 1, wherein the PDSN is, And if the terminal on which the session is established is an IPv4 terminal, assigns interface identification information according to subscriber information of the terminal. The method of claim 7, wherein the subscriber information, A mobile communication system, characterized in that the information is IMSI (International Mobile System Identifier). According to claim 1, wherein each terminal, And generating an IPv6 address using the interface identification information and the prefix information allocated from the PDSN. A mobile communication system comprising at least one PDSN, At least one terminal for establishing a session with the PDSN according to a user's selection; And if each terminal to which the session is established is an IPv4 terminal, generates an interface ID according to subscriber information of the terminal and includes a PDSN to allocate to each terminal. The method of claim 10, wherein each terminal, A mobile communication system, characterized in that either an IPv4 terminal having an IPv4 stack or an IPv6 terminal having an IPv6 stack. The method of claim 10, wherein the PDSN is, And a 64-bit interface ID is generated using the subscriber information and the intermediate address (ff: fe) of each terminal. The method of claim 10, wherein the PDSN is, Mobile communication system, characterized in that the IPv6 PDSN belonging to the IPv6 network. The method of claim 10, wherein the PDSN is, And when the session is established with each terminal, transmitting the prefix information. The method of claim 10, wherein each terminal, And generate an IPv6 local address or a global IPv6 address using the interface ID and the prefix information allocated from the PDSN. A packet service providing method of a mobile communication system in an IPv4 / IPv6 integrated network, Setting service options by at least one terminal; Establishing a link by the base station through a service negotiation procedure with each terminal; Determining, by the base station, a service option so that a session between an IPv6 PDSN and each terminal is established; And providing, by the IPv6 PDSN, a packet service by exchanging a packet between the terminal and an IPv6 application server. The method of claim 16, wherein setting the service option comprises: Packet service providing method of a mobile communication system, characterized in that for setting the IPv6 service option according to the user's selection. The method of claim 16, wherein establishing the session comprises: The base station checks the service option of each terminal, a) if the IPv6 service option is set, establish a link with the IPv6 PDSN, b) establishing a link with an IPv4 PDSN if the IPv6 service option is not set. The method of claim 16, wherein each terminal, A packet service providing method of a mobile communication system, characterized in that either an IPv4 terminal having an IPv4 stack or an IPv6 terminal having an IPv6 stack. The method of claim 16, Transmitting, by the IPv6 PDSN, a prefix information when the session is established; Checking subscriber information of the terminal if the IP address of the terminal is an IPv4 address; And generating and transmitting interface ID information according to the subscriber information to the terminal. The method of claim 16, Generating, by the terminal, an IPv6 local address using the interface ID information and the prefix information received from the PDSN; And generating a global IPv6 address using the interface ID information and the prefix information. In the address allocation method of IPv4 / IPv6 integrated network, Establishing a session with at least one terminal by a PDSN belonging to an IPv6 network; Transmitting prefix information to each terminal in the established session; Checking subscriber information of the terminal; Generating the interface ID information according to the subscriber information and transmitting the generated interface ID information to the terminal. The method of claim 22, wherein the subscriber information, Method for allocating an IPv4 / IPv6 integrated network characterized in that the IMSI information. The method of claim 22, wherein the interface ID information generation, And generating 64-bit interface ID information using the subscriber information and the intermediate address (ff: fe). The method of claim 22, Generating, by the terminal, an IPv6 local address using the interface ID information and the prefix information received from the PDSN; And generating a global IPv6 address by using the interface ID information and the prefix information. The method of claim 22, wherein the terminal, An address allocation method for an IPv4 / IPv6 integrated network, characterized in that the IPv4 terminal having an IPv4 stack.

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