06-05-2014, 10:40 AM
Wireless Application Protocol
Wireless Application .ppt (Size: 1.27 MB / Downloads: 122)
Mobile Applications - 1
Vehicles
transmission of news, road condition etc
ad-hoc network with near vehicles to prevent accidents
Emergencies
early transmission of patient data to the hospital
ad-hoc network in case of earthquakes, cyclones
military ...
Traveling salesmen
direct access to central customer files
consistent databases for all agents
mobile office
HTTP 1.0 characteristics
designed for large bandwidth, low delay
stateless, client/server, request/response communication
connection oriented, one connection per request
TCP 3-way handshake, DNS lookup overheads
big protocol headers, uncompressed content transfer
primitive caching (often disabled, dynamic objects)
security problems (using SSL/TLS with proxies)
HTML characteristics
designed for computers with “high” performance, color high-resolution display, mouse, hard disk
typically, web pages optimized for design, not for communication; ignore end-system characteristics
Goals
device and network independent application environment
for low-bandwidth, wireless devices
considerations of slow links, limited memory, low computing power, small display, simple user interface (compared to desktops)
integrated Internet/WWW programming model
high interoperability