CA2483044A1 - Roaming method between wireless local area network and cellular network - Google Patents

Roaming method between wireless local area network and cellular network Download PDF

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Publication number
CA2483044A1
CA2483044A1 CA 2483044 CA2483044A CA2483044A1 CA 2483044 A1 CA2483044 A1 CA 2483044A1 CA 2483044 CA2483044 CA 2483044 CA 2483044 A CA2483044 A CA 2483044A CA 2483044 A1 CA2483044 A1 CA 2483044A1
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CA
Canada
Prior art keywords
address
length
mobile terminal
wlan
cellular network
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA 2483044
Other languages
French (fr)
Other versions
CA2483044C (en
Inventor
Yong-Sik Shin
Si-Hoon Ryu
Dong-Hahk Lee
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SK Telecom Co Ltd
Original Assignee
Sk Telecom Co., Ltd.
Yong-Sik Shin
Si-Hoon Ryu
Dong-Hahk Lee
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sk Telecom Co., Ltd., Yong-Sik Shin, Si-Hoon Ryu, Dong-Hahk Lee filed Critical Sk Telecom Co., Ltd.
Publication of CA2483044A1 publication Critical patent/CA2483044A1/en
Application granted granted Critical
Publication of CA2483044C publication Critical patent/CA2483044C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/18—Selecting a network or a communication service
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • H04W8/08—Mobility data transfer
    • H04W8/12—Mobility data transfer between location registers or mobility servers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/40—Network security protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/04—Network layer protocols, e.g. mobile IP [Internet Protocol]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/005—Data network PoA devices

Abstract

The present invention relates to a roaming method between a WLAN and a cellular network which can interwork the WLAN and the cellular network on th e basis of a mobile IP system for smooth roaming. In data communication in the WLAN and/or the cellular network using the mobile IP system, the roaming method between the WLAN and the cellular network includes a step wherein a packet data serving node of the cellular network which recognizes allocation of an IP address to a specific mobile terminal notifies information on a current access state of the mobile terminal to an access point managing mean s of the WLAN located in a current service area of the mobile terminal, a step wherein the access point managing means which the mobile terminal newly accesses requests address renewal to replace an address of the packet data serving node by its address, allocates an IP address to the mobile terminal according to the renewal result, and notifies it to the packet data serving node, and a step wherein the packet data serving node which receives the notification message from the access point managing means transmits data obtained during the roaming due to the movement to the access point managing node, whereby the roaming is performed from the cellular network to the WLAN . In the same manner, the roamingcan be performed from the WLAN to the cellula r network.

Claims (6)

1. In data communication in a WLAN and/or a cellular network using a mobile IP system, a roaming method between the WLAN and the cellular network, comprising:
a first step wherein a packet data serving node of the cellular network which recognizes allocation of an IP address to a specific mobile terminal notifies information on a current access state of the mobile terminal to an access point managing means of the WLAN located in a current service area of the mobile terminal a second step wherein the access point managing means which the mobile terminal newly accesses requests address renewal to replace an address of the packet data serving node by its address, allocates an IP
address to the mobile terminal according to the renewal result, and notifies it to the packet data serving node; and a third step wherein the packet data serving node which receives the notification message from the access point managing means transmits data obtained during the roaming due to the movement to the access point managing node, whereby the roaming is performed from the cellular network to the WLAN.
2. In data communication in a WLAN and/or a cellular network using a mobile IP system, a roaming method between the WLAN and the cellular network, comprising:
a first step wherein an access point managing means of the WLAN

which recognizes allocation of an IP address to a specific mobile terminal notifies information on a currant access state of the mobile terminal to a packet data serving node of the cellular network located in a current service area of the mobile terminal a second step wherein the packet data serving node which the mobile terminal newly accesses requests address renewal to replace an address of the access point managing means by its address, allocates an IP
address to the mobile terminal according to the renewal result, and notifies it to the access point managing means and a third step wherein the access point managing means which receives the notification message from the packet data serving node transmits data obtained during the roaming due to the movement to the packet data serving node, whereby the roaming is performed from the WLAN to the cellular network.
3. The method of claim 1 or 2, wherein the notification message of the first step includes a protocol version and its length, a message identifier and its length, a packet length and its length, a sender IP address and its length, a client MAC address and its length, a user ID and its length, a user NAI and its length, a user password and its length, sequence numbers and its length.
4. The method of claim 1 or 2, wherein the notification message of the second step includes a protocol version and its length, a message identifier and its length, a packet length and its length, a sender IP address and its length, a connection context and its length, sequence numbers and its length.
5. The method of claim 1 or 2, wherein the packet data serving node and the access point managing means perform a mobile-IP based switching function to support mobility of the mobile terminal.
6. The method of claim 1 or 2, wherein the mobile terminal is a dual mode terminal which can access both the cellular network and the WLAN
and which embody a mobile IP stack.
CA 2483044 2002-05-14 2002-11-29 Roaming method between wireless local area network and cellular network Expired - Fee Related CA2483044C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
KR2002/26571 2002-05-14
KR10-2002-0026571A KR100427551B1 (en) 2002-05-14 2002-05-14 A roaming method between WLAN and cellular networks
PCT/KR2002/002250 WO2003096628A1 (en) 2002-05-14 2002-11-29 Roaming method between wireless local area network and cellular network

Publications (2)

Publication Number Publication Date
CA2483044A1 true CA2483044A1 (en) 2003-11-20
CA2483044C CA2483044C (en) 2012-07-10

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2483044 Expired - Fee Related CA2483044C (en) 2002-05-14 2002-11-29 Roaming method between wireless local area network and cellular network

Country Status (8)

Country Link
US (1) US7519363B2 (en)
EP (1) EP1504566B1 (en)
JP (1) JP4178475B2 (en)
KR (1) KR100427551B1 (en)
CN (1) CN100440823C (en)
AU (1) AU2002356464A1 (en)
CA (1) CA2483044C (en)
WO (1) WO2003096628A1 (en)

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Also Published As

Publication number Publication date
JP4178475B2 (en) 2008-11-12
CN100440823C (en) 2008-12-03
WO2003096628A1 (en) 2003-11-20
KR100427551B1 (en) 2004-04-28
CA2483044C (en) 2012-07-10
JP2005527145A (en) 2005-09-08
US7519363B2 (en) 2009-04-14
EP1504566A4 (en) 2008-02-13
EP1504566A1 (en) 2005-02-09
EP1504566B1 (en) 2012-06-20
KR20030088727A (en) 2003-11-20
CN1625868A (en) 2005-06-08
US20060013170A1 (en) 2006-01-19
AU2002356464A1 (en) 2003-11-11

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