mobility support for ip-based network
DESCRIPTION
Mobility Support for IP-Based Network. Jie Li, University of Tsukuba Hsiao-Hwa Chen, National Sun Yat-Sen University. IEEE Communications Magazine • October 2005. Professor : Sheau-Ru Tong Reporter : M9456001 李思儀 M9456002 林濟斌. Outline. Abstract MOBILE IP - PowerPoint PPT PresentationTRANSCRIPT
1
Mobility Support for IP-Based Network
Professor : Sheau-Ru Tong Reporter : M9456001 李思儀
M9456002 林濟斌
IEEE Communications Magazine • October 2005
Jie Li, University of TsukubaHsiao-Hwa Chen, National Sun Yat-Sen University
2
Outline
Abstract MOBILE IP MOBILE IPv6 Hierarchy of MAPs SECURITY REQUIREMENTS IP MOBILITY SUPPORT WITH WIRELESS
LANS CONCLUSION
3
Abstract
IP-based wireless networks will become the core of next-generation mobile networks.
Mobility support for IP-based networks. This article aims to provide an overview of
various major technical issues of mobility support for different IP-based networks including mobile IP
4
MOBILE IP Mobile IP was designed to provide a way to support
host mobility. Mobile IP entities:
Mobile node (MN) Home agent (HA) Foreign agent (FA) Care-of address (CoA) Collocated CoA Correspondent node (CN) Home address Tunnel
5
MOBILE IP (cont.)
Mobile IP uses two IP addresses Fixed home address CoA for the mobility of an MN
Three major processes Agent Discovery Registration Tunneling
6
ROUTING IN MOBILE IP
Mobile node (MN)
Home Agent
Foreign Agent
Foreign Network
Base StationBase Station
InternetCN
Home Network
Mobile node (MN)
1.Got home address
2.Handoff 3.Got CoA
4.Binding Update
5.Binding ACK
6.Packet Tunneling7.Packet from CN to HA
8.ACK
7
MOBILE IPv6
In IPv6, 128-bit addressing is used instead of the 32-bit addressing in IPv4.
IPv6 is considered as the core protocol for next-generation IP networks.
Mobile IPv6 has almost the same terminologies as Mobile IPv4 except for the absence of the FA.
8
Mobile IPv6 routing
Mobile node (MN)
Home Agent
Foreign Network
APAP
IPv6 Network
Home Network
CN
1.Handoff
2.Got CoA
3.Binding Update
4.Binding ACK
5.Packet Tunneling
6.Binding Update
7.Packet from CN to MN
9
Hierarchical Mobile IPv6
Router
Mobile anchor point (MAP)
Home Agent
Mobile node (MN)
AP
AP AP
Mobile node (MN)
Mobile node (MN)
Router
CNRouter
Internet
Home Network
1.Handoff
2.Registration LCoA
3.Registration RCoA
4.Packet tunneling5.Registration RCoA
6.Packet from CN to MN
7.Handoff
8.Get new LCoA
10
Hierarchy of MAPs
21 3 4 5 6
Mobile node (MN)
產生LCoA
Mobile node (MN)
產生 new LCoA
11
SECURITY REQUIREMENTS
In Mobile IP and Mobile IPv6, registration of the CoA naturally requires authentication.
An algorithm used for the authentication is known as keyed Message Digest 5(MD5).
12
IP MOBILITY SUPPORT WITHWIRELESS LANS
WI-FI is a technology currently dominating all wireless LANs.
802.11a 、 802.11b 、 802.11g,and so on. Address IP mobility support for wireless
LANs, including Wi-Fi and Bluetooth.
13
DHCP-Based Mobility in Wireless LANs
Mobility support is implemented through use of dynamic IP address allocation provided by DHCP
14
DHCP-Based Mobility in Wireless LANs cont.
Wireless LAN access points provide support for roaming at the data link layer
As MNs roam across subnets, though, there must be a mechanism at the IP/network layer
handoff
15
The Solutions with Mobile IP
16
WiMAX
WiMAX( Worldwide Interoperability for Microwave Access,全球互通的微波存取 )
17
The difference between Wi-Fi and WiMAX
Wi-Fi WiMAX
Range Small. Suitable for WLAN
Wide. Suitable for WMAN
Contention resolution
By CSMA/CA and RTS/CTS
Binary exponential backoff
Medium AccessMethod
CSMA/CA TDMA
18
IP Mobility Support For Cellular and Heterogeneous Mobile Networks
2G3G The aim of the process is to have an all-IP
network architecture to provide high-bit-rate multimedia services including voice, video, and data
The IP core network architecture includes the packet core network for wide area mobility and bearer services. Ex: Voice over IP ,Video over IP and Multimedia Messaging
19
IP Mobility Support For Cellular and Heterogeneous Mobile Networks cont.
UMTS CDMA2000 Both networks use tunnels to support user
mobility . However, the 3G networks
including CDMA2000 and UMTS currently
solve their mobility problems at the link layer
(layer 2) only, not in the IP layer (layer 3).
20
IP Mobility support for next generation heterogeneous mobile networks
21
CONCLUSION
According to this paper, we know some issues about “Mobility Support for IP-Based Networks”
In the future, we wish it will better for “IP mobility support for next generation heterogeneous mobile networks”.