09-08-2012, 02:37 PM
Searching the World Wide Web in Low Connectivity Communities
Searching the World.ppt (Size: 382 KB / Downloads: 22)
Web search
Alternative information sources exist
Web search replaces other info sources
Existing telecomms infrastructure
Optimized for fast delivery
Search: low-connectivity communities
Few sources of information
Web could provide information access
But - little infrastructure:
Telephone
Electric
TEK Design Goals
Reduce dependence on telecomms
Low & intermittent connectivity
Low-bandwidth
Reduce number of Internet searches
Similar to existing search engines
User friendly
TEK Protocol
Runs on both TEK Client and TEK Server
Request-reply model
If no reply, automatic retransmission
Other functions:
Client Registration
Administration messages
TEK Server: Track Client state
Record all client search requests
Record all URLs sent to client
Checks all candidate URLs, does not
send previously sent URLs