EA C451
BITS Pilani
Pilani|Dubai|Goa|Hyderabad
Vishal Gupta
BITS Pilani
Pilani|Dubai|Goa|Hyderabad
Agenda: Few 3G-WLAN
Internetworking Architectures
Hybrid Coupling with Radio Access
system
BITS Pilani, Deemed to be University under Section 3 of UGC Act, 1956
NOTE:
• You are required to understand the following architectures and analyze is,
logically. Try to answer the open questions given at the end.
• You are not required to remember these architectures. These are
proposed by individual researchers. Of course, from examination point of
view (of EA C451), you can be given any new architecture to analyze it.
• The idea is to show you that how you can explore further in this field and
take up research further.
BITS Pilani, Deemed to be University under Section 3 of UGC Act, 1956
BITS Pilani, Deemed to be University under Section 3 of UGC Act, 1956
BITS Pilani, Deemed to be University under Section 3 of UGC Act, 1956
BITS Pilani, Deemed to be University under Section 3 of UGC Act, 1956
Questions
• How to map the ID’s information into IP address. Is it possible??
• Source station always knows the destination IP address. Is it possible ??
• If node becomes mobile, the serving Base station/wlan/RNC changes.
Since this information is correctly required in the IP address, how mobility
is achieved ??
• Which network entity is responsible to populate the various databases ??
• Can similar architecture function for tight coupling also ??
• Who is responsible for AAA services ??
BITS Pilani, Deemed to be University under Section 3 of UGC Act, 1956
Integration of 802.11 and ThirdGeneration Wireless Data
Networks
BITS Pilani, Deemed to be University under Section 3 of UGC Act, 1956
BITS Pilani, Deemed to be University under Section 3 of UGC Act, 1956
Gateway Design
BITS Pilani, Deemed to be University under Section 3 of UGC Act, 1956
Security/Accounting subsystem
• Radius Server
– Remote Authentication Dial In User Service (RADIUS) is a networking
protocol that provides centralized Authentication, Authorization, and
Accounting (AAA) management for computers to connect and use a
network service.
– it is often used by ISPs and enterprises to manage access to the Internet
or internal networks, wireless networks, and integrated e-mail services.
– RADIUS is a client/server protocol that runs in the application layer, using
UDP as transport.
• RADIUS serves three functions:
– to authenticate users or devices before granting them access to a network
– to authorize those users or devices for certain network services
– to account for usage of those services.
BITS Pilani, Deemed to be University under Section 3 of UGC Act, 1956
• Mobile IP agent
– Implements mobile IP agent functionality.
– Supports role of both home agent and foreign agent.
• Dynamic Firewall
– It is used to install complex sets of packet filtering rules that depend on per user policy.
• QoS module
• Accounting module
• Integrated web cache
BITS Pilani, Deemed to be University under Section 3 of UGC Act, 1956
Improved Mobility Management
Scheme
BITS Pilani, Deemed to be University under Section 3 of UGC Act, 1956
Intra Domain Mobility
Management Protocol
Fig: Network Architecture
BITS Pilani, Deemed to be University under Section 3 of UGC Act, 1956
BITS Pilani, Deemed to be University under Section 3 of UGC Act, 1956
Fig: Signaling flow during interdomain movement
BITS Pilani, Deemed to be University under Section 3 of UGC Act, 1956
Improved Version of previous one
BITS Pilani, Deemed to be University under Section 3 of UGC Act, 1956