KR20100073891A - Method for processing handover in mobile internet system - Google Patents

Abstract

PURPOSE: A treating method in a portable internet system processing the hand over at a high speed is provided to process hand over without the change of the preset IP address by renewing mobility management information. CONSTITUTION: A control station MSC(Mobile Switching Center, 30) transfers the information of a portable terminal(10) to a portability management server HA(Home Agent)/LMA(Local Mobility Anchor, 40). The portability management server requests the authentication of the portable terminal to an authentication server(50). The authentication server transmits an answer signal MAA(MIP6 Authorization Answer) including an authentification result to the portability management server. The portability management server transmits an answer signal PBA(Proxy Binding Answer) after a management information update PBU(Proxy Binding Update) of the portable terminal to the control station. The control station processes the handover without IP(Internet Protocol) address modification of the portable terminal.

Description

Handover processing method in portable internet system {METHOD FOR PROCESSING HANDOVER IN MOBILE INTERNET SYSTEM}

The present invention relates to a handover processing method in a portable internet system, and more particularly, to set an IP address in a portable terminal first connected to the portable internet, and perform an authentication process as a handover situation occurs in the portable terminal. The present invention relates to a handover processing method in a portable internet system for updating handover management information of a portable terminal and processing a handover quickly without changing a preset IP address.

In the handover method of the portable Internet system, the simple IP handover using a tunnel creates a 'GRE' tunnel from the portable Internet control station to the terminal, manages the location of the terminal, and changes the control station as the terminal moves. If there is communication traffic, if there is communication traffic, the tunnel is extended to provide a handover. If there is no communication traffic, the handover is provided after resetting the IP address of the terminal.

Since the simple IP handover of the network layer changes the IP address of the terminal, it requires a complicated additional technology to provide a communication service requiring an incoming call such as Voice over IP (VoIP).

To solve this problem, a technology called 'Mobile IP' has been developed. 'Mobile IP' sets two IP addresses in the terminal. The home address (HoA), which is an unchanging address set in the terminal, is used for identification of the terminal, and the other address of 'Mobile IP' set in the terminal changes its address when the control station changes according to the movement of the terminal. It is called (Care-of-Address).

The mobile IP has a disadvantage in that two IP addresses must be set in the terminal, and the development of software to support the mobile IP is required, and the handover processing time of the IP layer requires at least 1.5 seconds. There is a disadvantage.

It is a problem of the present invention to solve the problems of the prior art as described above.

Accordingly, the present invention sets an IP address to a mobile terminal initially connected to the mobile Internet, performs an authentication process according to a handover situation in the mobile terminal, and updates the mobility management information of the mobile terminal when the mobile terminal is successfully processed. It is an object of the present invention to provide a handover processing method in a portable Internet system for quickly handling a handover without changing an IP address.

The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention which are not mentioned can be understood by the following description, and will be more clearly understood by the embodiments of the present invention. Also, it will be readily appreciated that the objects and advantages of the present invention may be realized by the means and combinations thereof indicated in the claims.

In the method of the present invention for achieving the above object, in a handover processing method in a portable Internet system, a control station delivers and manages information of the portable terminal to a mobility management server as a handover situation occurs in the portable terminal. Requesting an update of the information; Requesting, by the mobility management server, authentication of the mobile terminal to an authentication server; Transmitting, by the authentication server, an authentication signal (MAA) containing an authentication result to the mobility management server after performing the authentication process of the mobile terminal; Transmitting, by the mobility management server, a response signal (PBA) to the control station after updating management information of the portable terminal as authentication is normally processed; And the control station processing the handover without changing the IP address of the portable terminal.

In addition, the present invention processes a handover at high speed by setting one IP address in the terminal.

In addition, the present invention by setting a single IP address to the terminal to handle the handover, eliminating the need for additional software to provide mobility to the terminal, the service that the terminal initiates communication, such as service Internet data search Of course, it can be easily provided with a service for receiving communication, such as RSS (Really Simple Syndication), VoIP.

In addition, the present invention can shorten the handover control procedure between the terminal and the base station to shorten the handover time, it is possible to reduce the error rate of the handover control message.

In addition, the present invention provides a network layer handover in the portable Internet system by reflecting the characteristics of the portable Internet, the terminal does not change during the movement using a single IP address, the handover processing time is also a real-time service such as voice service Provides network-based handover processing suitable for providing

The present invention as described above, by setting the IP address to the first mobile terminal connected to the mobile Internet, and performs the authentication process in accordance with the handover situation occurs in the mobile terminal by updating the mobility management information of the mobile terminal, There is an effect that the handover can be processed quickly without changing the preset IP address.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings, It can be easily carried out. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the drawings of the present invention (FIGS. 2-8), "+-+" represents 1 bit.

1 is a flowchart illustrating a handover processing method in a portable internet system according to the present invention.

First, when the mobile terminal 10 is connected to the base station 20 and performs a predetermined authentication process with the authentication server 50 through the control station 30 and is normally processed, the control station 30 is connected to the mobile terminal 10. ), And provide a mobile Internet service (Voip). At this time, the portable terminal 10 is registered in the mobility management server 40 by the control station 30.

That is, the control station 20 detects a radio signal between the mobile terminal 10 and the base station 20, negotiates parameters for network connection, and processes authentication through the authentication server 50. In addition, a service flow for communication between the mobile terminal 10 and the base station 20 and the control station 30 is generated.

Subsequently, as the handover situation occurs in the mobile terminal 10, the control station 30 transmits the information of the mobile terminal 10 to a mobility management server (HA: Home Agent / LMA: Local Mobility Anchor) 40. Request for update of management information (PBU: Proxy Binding Update) (101, 102).

Then, the mobility management server 40 requests authentication of the mobile terminal 10 to the authentication server 50 (MAR: MIP6 Authorization Request) 103.

Then, the authentication server 50 performs an authentication process of the mobile terminal 10 and transmits a response signal (MAA: MIP6 Authorization Answer) containing the authentication result to the mobility management server 40 (104).

Then, the mobility management server 40 updates the management information of the mobile terminal 10 as authentication is normally processed, and then transmits a response signal (PBA: Proxy Binding Answer) to the control station 30 (105).

The control station 30 then processes the handover without changing the IP address of the portable terminal 10 (106).

On the other hand, the "101" to "105" process is the same as the initial registration process of the mobile terminal 10, in this case, the control station 30 to the mobile terminal 10 to set the address (Router Advertisement) Sends a signal, and sets an IP address in the portable terminal 10.

2 is an example of an update request signal (PBU) of mobility management information according to the present invention. When the mobile terminal 10 first requests access to the mobile Internet, the control station 30 sends a request to the mobile station management server 40. Indicates a signal to transmit.

As shown in FIG. 2, 'Version' is composed of 4 bits and has a value of '0110'. 'Traffic Class' is composed of 8 bits and typically has a value of '00000000', and may have any value. The 'Flow Label' is composed of 20 bits and typically has a value of '00000000000000000000' and may have any value.

'Payload Length' is composed of 16 bits and indicates the length of control information following the destination address in 8 bit units. 'Next Header' consists of 8 bits and has a value of '10000111'. 'Hop Limit' consists of 8 bits and can be configured as '01000000', and can have any value.

'Source Address' is composed of 128 bits and uses the address of the control station 30, and 'Destination Address' is composed of 128 bits and uses the address of the mobile station management server 40.

'Payload Proto' consists of 8 bits and has a value of '0011 1011'. 'Header Len' consists of 8 bits and is expressed in 8 bit units from 'Payload Proto' to the end of PBU control information. 'MH Type' consists of 8 bits and has a value of '00000101'. 'Reserved' consists of 8 bits and has a value of '00000000'. 'Checksum' consists of 16 bits and is calculated as 1's complement of 'Payload Proto' to the end of PBU control information. 'Sequence' consists of 16 bits and represents the serial number of the control signal.

'A' indicates the 'Acknowledgement' request as 1 bit, set to 1. 'H' indicates 'Home Registration' as 1 bit, set to 1. 'L' indicates 'Link local compatibility' as 1 bit, set to 0. 'K' indicates 'Key management compatibility' as 1 bit, set to 0. 'M' indicates 'MAP Registration compatibility' as 1 bit, set to 0. 'R' represents 'Mobile Router' as 1 bit, set to 0. 'P' indicates 'Proxy Home Registration' as 1 bit, set to 1.

'Lifetime' consists of 16 bits and displays the expiration time in units of 4 seconds. 'Type' is additional information to support mobility, and 'Mobile Node Identifier' has a value of '00001000' and adds information such as 'Home Network Prefix', 'Handoff Indicator', 'Access Technology Type', and 'Timestamp'. Configure as an enemy.

In an embodiment of the present invention, 'Home Network Prefix' is set to a value of '00010000', and 'Timestamp' is set to a value of '00011011'. However, type values such as 'Home Network Prefix', 'Handoff Indicator', 'Access Technology Type', and 'Timestamp' can be configured according to the standard when an international standard is established.

'Length' which constitutes 'Home Network Prefix' is composed of 8 bits and uses '00010010'. 'Reserved' which constitutes 'Home Network Prefix' consists of 8 bits and uses '00000000'. 'Perfix Length', which composes 'Home Network Prefix', is composed of 8 bits, indicating the prefix length. 'Length' which constitutes 'Timestamp' is composed of 8 bits, and '00001000' is used.

The 'Timestamp' value consists of 64 bits, which represents the time when the PBU control information is generated as of January 1, 1970. 'Length' that constitutes 'Mobile Node Identifier' is composed of 8 bits, and indicates the length of information after 'Length'.

3 is another exemplary diagram of an update request signal (PBU) of mobility management information according to the present invention. When the handover situation occurs in the mobile terminal 10, the control station 30 transmits the information to the mobile station management server 40. FIG. Indicates a signal.

As shown in FIG. 3, most of the information is the same as the signal of FIG. 2, but includes a Next Header 310, an Hdr Ext len 320, an Option Type 330, an Option Length 340, a Home address 350, and the like. It contains more information.

That is, the Next header 310 starting from the 321 th bit is composed of 8 bits and uses '10001000'. Hdr Ext Len 320 is composed of 8 bits and represents the length from 321 th to 'Home address' in 8 bit units. In this case, padding information for bit adjustment may be additionally inserted to configure control information.

Option Type 330 starting from bit 336 is composed of 8 bits and uses '11001001'. The following Option length (340) is composed of 8 bits and uses '00010000'. The following 'Home Address' consists of 128 bits and represents the IP address of the mobile terminal 10.

4 is an exemplary view of a response signal PBA to an update request signal of mobility management information according to the present invention, and includes both the first time the portable terminal 10 accesses the portable Internet or the handover.

As shown in FIG. 4, 'Version' is composed of 4 bits and has a value of '0110'. 'Traffic Class' is composed of 8 bits, and typically has a value of '00000000' and may have any value. The 'Flow Label' is composed of 20 bits and typically has a value of '00000000000000000000' and may have any value.

'Payload Length' is composed of 16 bits and indicates the length of control information following the destination address in units of 8 bits. 'Next Header' consists of 8 bits and has a value of '10000111'. 'Hop Limit' consists of 8 bits and can be configured as '01000000', and can have any value.

'Source Address' is composed of 128 bits and represents the address of the mobility management server 40. 'Destination Address' is composed of 128 bits and represents the address of the control station 30.

'Payload Proto' consists of 8 bits and has a value of '0011 1011'. 'Header Len' consists of 8 bits and is expressed in 8 bit units from 'Payload Proto' to the end of PBA control information. 'MH Type' consists of 8 bits and has the value '00000110'. 'Reserved' consists of 8 bits and has a value of '00000000'. 'Checksum' consists of 16 bits and is calculated as 1's complement of 'Payload Proto' to the end of PBA control information. 'Status' consists of 8 bits.

'K' indicates 'Key management compatibility' as 1 bit, set to 0. R represents 'Mobile Router' as 1 bit, set to 0. 'P' indicates 'Proxy Mobile Registration' as 1 bit, set to 1. 'Sequence' consists of 16 bits and uses the 'Sequence' value of the PBU control signal as the serial number of the control signal. 'Lifetime' consists of 16 bits and displays the expiration time in units of 4 seconds.

'Type' is additional information to support mobility, and 'Mobile Node Identifier' has a value of '00001000' and adds information such as 'Home Network Prefix', 'Handoff Indicator', 'Access Technology Type', and 'Timestamp'. Configure as an enemy.

In the implementation according to the present invention, 'Home Network Prefix' is set to a value of '00010000' and 'Timestamp' is set to a value of '00011011'. However, in principle, type values such as 'Home Network Prefix', 'Handoff Indicator', 'Access Technology Type', and 'Timestamp' should follow the international standard.

'Length' which constitutes 'Home Network Prefix' is composed of 8 bits and uses '00010010'. 'Reserved' which constitutes 'Home Network Prefix' consists of 8 bits and uses '00000000'. 'Perfix Length', which composes 'Home Network Prefix', is composed of 8 bits, indicating the prefix length. 'Length' which constitutes 'Timestamp' is composed of 8 bits, and '00001000' is used.

The 'Timestamp' value consists of 64 bits, which represents the time when the PBU control information is generated as of January 1, 1970. 'Length' that constitutes 'Mobile Node Identifier' is composed of 8 bits, and indicates the length of information after 'Length'.

5 is an exemplary view of a TCP / IP header of a MAR / MAA signal according to the present invention.

As shown in FIG. 5, 'Version' is composed of 4 bits and has a value of '0110'. 'Traffic Class' is composed of 8 bits, and typically has a value of '00000000' and may have any value. 'Flow Label' is composed of 20 bits, and typically has a value of '00000000000000000000', and may have any value.

'Payload Length' is composed of 16 bits and indicates the length of control information following the destination address in units of 8 bits. 'Next Header' consists of 8 bits and has a value of '00000110'. 'Hop Limit' consists of 8 bits and can be configured as '01000000', and can have any value.

'Source Address' is composed of 128 bits and uses the address of the mobility management server 40. 'Destination Address' is composed of 128 bits and uses the address of the authentication server 50.

'Source Port' consists of 16 bits and uses an arbitrary port number not assigned as standard. In the embodiment of the present invention, an unassigned number between 45967 and 46998 was used. However, other unassigned numbers may be used. 'Destination Port' is composed of 16 bits and uses '0000111100011100'. This value indicates DIAMETER authentication protocol.

'Sequence Number' consists of 32 bits and uses a random number. 'Acknowledgement Number' consists of 32 bits. If the 428th ACK bit is 1, the 'sequence number' to be sent next is used. 'Header Length' is composed of 4 bits, and '1000' is used because general information is configured constantly. 'Reserve' consists of 4 bits and uses '0000'.

One bit 'CWR' is used as 1 to indicate 'Congestion Window Reduced'. One bit 'ECE' uses 1 to indicate 'Explicit Congestion Notification Echo'. One bit 'URG' uses 1 to indicate 'Urgent'. One bit 'ACK' uses 1 to indicate 'Acknowledgement'. One bit 'PSH' uses 1 to indicate 'Push'. One bit 'RST' uses 1 to indicate 'Reset'. One bit 'SYN' uses 1 to indicate 'Synchronize sequence numbers'. 1 bit 'FIN' uses 1 if there is no data to send.

'Window' consists of 16 bits and displays the information you want to receive data continuously. 'Checksum' consists of 16 bits and is calculated as 1's complement of 'Source Port' to the end of 'MAR / MAA' control information. Additional information such as 'No-Operation' and 'Time Stamp Option' can be configured.

Additional information of 'Time Stamp' uses 32-bit 'Timestamp' and 32-bit 'Timestamp echo reply' information using 8-bit 'kind' information of '00001000' and 8-bit 'Length' information of '00001010'. use.

FIG. 6 is an example of an authentication request signal MAR according to the present invention, and is used in combination with the header of FIG.

As shown in FIG. 6, an 8-bit 'version' indicates a version of the Diameter protocol and uses '00000001'. 'Message Length' consists of 24 bits and indicates the length of information from 'Version' to 'User Name (NAI)'.

One bit 'R' represents 'Request', and 'MAR' uses 1. One bit 'P' stands for 'Proxy' and uses 0. One bit 'E' indicates an error and uses 0. 'T' indicates zero for potential retransmission information. 'Reserve' consists of 4 bits and uses '0000'. 'Command-Code' is composed of 24 bits, and in the present invention, a value of '000000000000000100101011' is arbitrarily used. However, if internationally standardized, the standard can be configured accordingly.

'Application-ID' is composed of 32 bits and in the present invention, a value of '0000 0000 0000 0000 0000 0000 0000 0110' is arbitrarily used. However, if internationally standardized, the standard can be configured accordingly. 'Hop-by-Hop Identifier' and 'End-to-End Identifier' consist of 32 bits, and 'Hop-by-Hop Identifier' and 'End-to-End Identifier' of 'MAR' and 'MAA' are the same Use a value.

Various additional information is added to 'AVP Code' information, 'AV (Vendor-Specific)', 'M' (Mandatory), 'P' (Protected), 'reserved', 'AVP flag' information, 'AVP Length information,' AVP code 'values. It consists of detailed information according to.

Additional information of 'MAR' is based on 'Session id' with 'AVP code' value '0000 0000 0000 0000 0000 0001 0000 0111', 'AVP flag' information, 'AVP Length' information and 'AVP code' value. Detailed Information,

'Auth-Application ID' with 'AVP code' value '0000 0000 0000 0000 0000 0001 0000 0010', related 'AVP flag' information, 'AVP Length' information, detailed information according to 'AVP code' value,

'Origin Host' with 'AVP code' value '0000 0000 0000 0000 0000 0001 0000 1000', related 'AVP flag' information, 'AVP Length' information, detailed information according to 'AVP code' value,

'Origin Realm' with 'AVP code' value '0000 0000 0000 0000 0000 0001 0010 1000', related 'AVP flag' information, 'AVP Length' information, detailed information according to 'AVP code' value,

'Destination Realm' with 'AVP code' value '0000 0000 0000 0000 0000 0001 0010 1011', 'AVP flag' information, 'AVP Length' information, detailed information according to 'AVP code' value,

'Auth-Session-State' with 'AVP code' value '0000 0000 0000 0000 0000 0001 0001 0101' and related 'AVP flag' information, 'AVP Length' information, detailed information according to 'AVP code' value,

User-Name with 'AVP code' value '0000 0000 0000 0000 0000 0000 0000 0001' and related 'AVP flag' information, 'AVP Length' information and detailed information according to 'AVP code' value Configure in combination.

7 is an example of an authentication response signal (MAA) according to the present invention, used in combination with the header of FIG.

The 'Source Address' of FIG. 5 constituting the control information of the MAA is composed of 128 bits, uses the address of the authentication server 50, and the 'Destination Address' is composed of 128 bits and uses the address of the mobility management server 40. do. The 'Source Port' of FIG. 5 constituting the control information of the MAA uses the 'Destination Port' of the 'MAR', and the 'Destination Port' uses the 'Source Port' of the 'MAR'.

'Version' of FIG. 7 consists of 8 bits and indicates a version of the Diameter protocol, and uses '00000001'. 'Message Length' consists of 24 bits and indicates the length of information from 'Version' to 'User Name (NAI)'.

One bit 'R' represents 'Request', and 'MAR' uses 1. One bit 'P' stands for 'Proxy' and uses 0. One bit 'E' indicates an error and uses 0. 'T' indicates zero for potential retransmission information. 'Reserve' consists of 4 bits and uses '0000'.

'Command-Code' is composed of 24 bits, and in the present invention, a value of '000000000000000100101011' is arbitrarily used. However, if internationally standardized, the standard can be configured accordingly. 'Application-ID' is composed of 32 bits and in the present invention, a value of '0000 0000 0000 0000 0000 0000 0000 0110' is arbitrarily used. However, if internationally standardized, the standard can be configured accordingly.

'Hop-by-Hop Identifier' and 'End-to-End Identifier' consist of 32 bits, and 'Hop-by-Hop Identifier' and 'End-to-End Identifier' of 'MAR' and 'MAA' are the same Use a value. Various additional information includes 'AVP Code' information, 'AV (Vendor-Specific)', 'M' (Mandatory), 'P' (Protected), 'r' (reserved) 'AVP flag' information, 'AVP Length' information, 'AVP code' value It consists of detailed information according to.

Additional information of 'MAR' is based on 'Session id' with 'AVP code' value '0000 0000 0000 0000 0000 0001 0000 0111', 'AVP flag' information, 'AVP Length' information and 'AVP code' value. Detailed Information,

'Auth-Application ID' with 'AVP code' value '0000 0000 0000 0000 0000 0001 0000 0010', related 'AVP flag' information, 'AVP Length' information, detailed information according to 'AVP code' value,

'Auth-Session-State' with 'AVP code' value '0000 0000 0000 0000 0000 0001 0001 0101' and related 'AVP flag' information, 'AVP Length' information, detailed information according to 'AVP code' value,

'Origin Host' with 'AVP code' value '0000 0000 0000 0000 0000 0001 0000 1000', related 'AVP flag' information, 'AVP Length' information, detailed information according to 'AVP code' value,

'Origin Realm' with 'AVP code' value '0000 0000 0000 0000 0000 0001 0010 1000', related 'AVP flag' information, 'AVP Length' information, detailed information according to 'AVP code' value,

'Result-Code' with 'AVP code' value '0000 0000 0000 0000 0000 0001 0000 1100', 'AVP flag' information, 'AVP Length' information, detailed information according to 'AVP code' value,

'User-Name' with 'AVP code' value '0000 0000 0000 0000 0000 0000 0000 0001', related 'AVP flag' information, 'AVP Length' information, detailed information according to 'AVP code' value,

'Origin-State-ID' with 'AVP code' value '0000 0000 0000 0000 0000 0001 0001 0110' and related 'AVP flag' information, 'AVP Length' information, and detailed information according to 'AVP code' value Configured individually or in combination.

FIG. 8 is an exemplary diagram of an RA signal according to the present invention. When the portable terminal 10 first accesses a network, the control station 30 extracts 'Home Network Prefix' information from the PBA signal of FIG. This indicates the state used as the signal's prefix information.

As shown in FIG. 8, 'Version' is composed of 4 bits and has a value of '0110'. 'Traffic Class' is composed of 8 bits, and typically has a value of '00000000' and may have any value. The 'Flow Label' is composed of 20 bits and typically has a value of '00000000000000000000' and may have any value. 'Payload Length' is composed of 16 bits and indicates the length of control information following the destination address in units of 8 bits. 'Next Header' consists of 8 bits and has a value of '0011 1010'. 'Hop Limit' is composed of 8 bits and can be configured as '11111111', and can have any value.

'Source Address' is composed of 128 bits, and is configured using the interface information of the control station 30. The first 16 bits of 'Source Address' 128 bits are set to '1111 1110 1000 0000', the next 48 bits are all set to '0', and the next 24 bits use the upper 24 bits of the interface address of the control station 30. The next 16 bits are configured using '1111 1111 1111 1110' and the next 24 bits are configured using the lower 24 bits of the interface address of the control station 30.

The 'Destination Address' consists of 128 bits. The Chuck 16 bits use '1111 1111 0000 0010', the next 108 bits all use '0', and the next 4 bits use '0001'.

'Type' consists of 8 bits and uses '1000 0110'. 'Code' consists of 8 bits and uses '0000 0000'. 'Checksum' is composed of 16 bits and is calculated as 1's complement of the sum from the 321 th bit of FIG. 8 to the 'Prefix' information. 'Cur Hop Limit' consists of 8 bits and can be configured as '01000000', and can have any value.

'M' indicates 'Managed address configuration' as 1 bit, and is set to 0. O indicates 'Other configuration' as 1 bit and is set to 1. 'Reserved' 6 bits uses '000000'. 'Router Lifetime' consists of 16 bits and uses the value in seconds. 'Reachable Time' consists of 32 bits and uses milliseconds. 'Retrans Timer' consists of 32 bits and uses milliseconds.

Additional information such as 'link-layer address' and 'prefix information' is additionally configured. The type for indicating additional information of link-layer address is composed of 8 bits and uses '0000 0001'. 'Length' consists of 8 bits and uses '0000 0001'. The 'Link-Layer address' information consists of 48 bits and uses the interface information of the control station 30. 'Type' for displaying additional information of 'prefix information' is composed of 8 bits and '0000 0011' is used.

'Length' consists of 8 bits and uses '0000 0100'. 'Prefix Length' consists of 8 bits and uses '0100 0000'. 'L' uses 0 to represent 'on-link' as 1 bit. 'A' uses 1 to indicate 'autonomous address-configuration' as 1 bit. 'Reserved1' consists of 6 bits and uses '000000'. 'Valid Lifetime' consists of 32 bits and uses the value in seconds. 'Preferred Lifetime' consists of 32 bits and uses the value in seconds. 'Reserved2' consists of 32 bits and all use '0'. 'Prefix' is used to extract 'Home Network Prefix' information from the PBA signal of FIG.

On the other hand, the method of the present invention as described above can be written in a computer program. And the code and code segments constituting the program can be easily inferred by a computer programmer in the art. In addition, the written program is stored in a computer-readable recording medium (information storage medium), and read and executed by a computer to implement the method of the present invention. The recording medium may include any type of computer readable recording medium.

The present invention described above is capable of various substitutions, modifications, and changes without departing from the technical spirit of the present invention for those skilled in the art to which the present invention pertains. It is not limited by the drawings.

The present invention can be used for a portable internet system and the like.

1 is a flowchart illustrating a handover processing method in a portable internet system according to the present invention;

2 is an exemplary view of an update request signal PBU of mobility management information according to the present invention;

3 is another exemplary diagram of an update request signal PBU of mobility management information according to the present invention;

4 is an exemplary view of a response signal PBA to an update request signal of mobility management information according to the present invention;

5 is an exemplary view of a TCP / IP header of a MAR / MAA signal according to the present invention;

6 is an exemplary view of an authentication request signal (MAR) according to the present invention;

7 is an exemplary view of an authentication response signal (MAA) according to the present invention;

8 is an exemplary view of an RA signal according to the present invention.

* Explanation of symbols for the main parts of the drawings

10: mobile terminal 20: base station

30: control station 40: mobility management server

50: authentication server

Claims (2)

In the handover processing method in the portable Internet system, Requesting an update of management information by transferring information of the mobile terminal to a mobility management server when a handover situation occurs in the mobile terminal; Requesting, by the mobility management server, authentication of the mobile terminal to an authentication server; Transmitting, by the authentication server, an authentication signal (MAA) containing an authentication result to the mobility management server after performing the authentication process of the mobile terminal; Transmitting, by the mobility management server, a response signal (PBA) to the control station after updating management information of the portable terminal as authentication is normally processed; And The control station processing the handover without changing the IP address of the mobile terminal Handover processing method in a portable internet system comprising a. The method of claim 1, The control station, A handover processing method in a portable Internet system, which is either a mobile access gateway (MAG) or an IP address assignment server (DHCP server).

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