WAP Architecture

1
WAP Architecture

• Presented by,
• Nithya Inbamani

2
WAP Background

• Wireless Application Protocol secure
  specification.
• Convergence of wireless data market and internet
• Internet computers with higher bandwidth.
• Limitations of the hand held devices -
• Less Powerful CPUs
• Less memory
• Smaller Displays
• Restricted Power Consumption
• Different Input Devices (Phone keypad)

3
WAP Background -contd

• Constrained Communication environment of wireless
  data networks-
• Less Bandwidth
• More Latency
• Less Connection Stability
• Less Predictable Availability
• WAP Architecture provides solutions to n/w
  operators that are
• Interoperable
• Scalable
• Reliable
• Efficient
• Secure

4
W W W Programming Model
5
WAP Programming Model
6
WAP Network - Example

• WAP Proxy translates WAP request to WWW
  requests, encodes responses from the web server.
• HTML Filter converts WWW content into WAP
  content.
• WTA is a gateway server

7
WAP Architecture
8
Application Layer - Wireless Application
Environment (WAE)

• General Purpose Application Environment based
  on combination of WWW and Mobile Telephony
  Technologies.
• Wireless Markup Language (WML), WMLScript.

9
Session Layer - Wireless Session Protocol (WSP)

• Opens a session of communication between client
  and server.
• Establishes protocol and negotiations
• Exchanges encoded data
• Exchanges requests and replies
• Supports asynchronous transmission of data.

10
Transaction Layer - Wireless Transaction Protocol
(WTP)

• Deals with transaction and retransmission of
  data, separation and concatenation of data.
• Has a separate interface to manage WTP layer and
  settings of handheld device.

11
Security Layer - Wireless Transport Layer
Security (WTLS)

• Security Protocol
• Used for secure communication between terminals
• Provides the following
• Data Integrity
• Privacy
• Authentication
• Denial-of-service protection

12
Transport Layer - Wireless Datagram Protocol (WDP)

• Transport Layer Protocol.
• Offers consistent service and common interface to
  upper layers of protocols.
• Enhances communication between Bearer Services
  and upper level protocols.

13
Bearers

• Products that implement WAP in their network and
  technology.
• Eg CDPD, Mobitex, GSM

14
Conclusion

• The need for wireless technology has grown
  tremendously in the last 2 years.
• In future may be we can program our grocery
  list in portable devices.
• May be a palm pilot could be programmed to submit
  assignments and exams.

15
References

• http//taz.lasile.info/TAZ/Reseaux/WAP/Specif_Couc
  hes_WAP/SPEC-WAPArch-19980430.pdf
• http//www.cs.purdue.edu/homes/fahmy/reports/leyna
  wap.htm