wireless internet issues

1. G. H. RAISONI COLLEGE OF ENGINEERING
(An autonomous Institute under UGC act 1956 & affiliated to RTMNU, Nagpur)
Department of Computer Science & Engineering
Session 2014-15
Subject: AWN Subject Teacher: Prof. V. A. Gulhane
Presented By: Shiwani Laghawe Session: 2014-2015
Roll No.: 6

2. Wireless Internet
“Wireless Internet refers to the extension of the services offered
by the Internet to mobile users, enabling them to access them
to access information and data irrespective of their location."
Wireless part of wireless Internet Traditional Wired Internet
Wireless AP connected to a
subnet of the Internet
Mobile node that can
be connected to any
AP running WLAN
protocol
Fig. An illustration of wireless Internet

3. Address Mobility
Inefficiency of transport
layer protocols
Inefficiency of application
layer protocols

4. Address Mobility
Subnet A
10.6.6.x
Subnet B
10.6.15.x
IP address 10.6.6.1
Packet
addressed to
10.6.6.1
Wireless AP Wireless AP
Fig. A
Subnet A
10.6.6.x
Subnet B
10.6.15.x
IP address 10.6.6.1
Network identifier
in10.6.6.1 is different from
the subnet address
Packet
addressed to
10.6.6.1
Wireless AP
Wireless AP
Fig. B

5. Inefficiency of Transport Layer Protocols
a. Transport layer is important in the internet.
b. It ensures setting up and maintaining end to end
connections, reliable end to end delivery of data
packets, flow control and congestion control.
c. Wireless Internet Requires efficient operation of the
transport layer protocol as the wireless medium is
inherently unreliable.
d. Indirect TCP(ITCP),Snoop TCP, and mobile TCP are some
solutions.

6. Inefficiency of Application Layer Protocols
a. Traditional application layer protocols used in the
Internet such as HTTP, TELNET, SMTP and several
markup languages such as HTML.
b. Wireless bandwidth is limited and expensive. Also the
capabilities of handheld devices are limited.
c. Wireless Application protocol(WAP) and optimizations
over traditional HTTP are some of the solutions for the
application layer issue.