Posted By:
Werner_Farstad
Posted On:
Thursday, February 21, 2002 06:10 AM
The MIDP specifies that J2ME/MIDP implementations should as a minimum support the http1.1 protocol. Doesn't this also imply that the handset have to implement some version of TCP (with extension for mobility?) since http runs on TCP and all web server's on the Internet use http over TCP ? How is this as opposed to WAP that has it's own optimised protocol-stack (WDP/WTLS/WTP/WSP)? Does J2ME/MIDP and its connection-framework skip all this optimisation and implement standard TCP on the handset? Or, does the connection-framework use some of the WAP-protocols (if present on the handset) to "support" the http-protocol? If so, how can a wap-protocol (i.e. WSP) speak with a TCP-socket? Is there any gateway in this picture (like t
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The MIDP specifies that J2ME/MIDP implementations should as a minimum support the http1.1 protocol. Doesn't this also imply that the handset have to implement some version of TCP (with extension for mobility?) since http runs on TCP and all web server's on the Internet use http over
TCP
?
How is this as opposed to WAP that has it's own
optimised
protocol-stack (WDP/WTLS/WTP/WSP)? Does J2ME/MIDP and its connection-framework skip all this optimisation and implement standard TCP on the handset? Or, does the connection-framework use some of the WAP-protocols (if present on the handset) to "support" the http-protocol? If so, how can a wap-protocol (i.e. WSP) speak with a TCP-socket? Is there any gateway in this picture (like the wap-gateway)? Handsets using WAP over GPRS (and getting its own IP-address) will use UDP instead of WDP. Otherwise the WDP protocol is used (i.e. when GSM is used).
So, my question(s) is: How is this implemented in the J2ME/MIDP when basicly only IP is available. How is the http-protocol supported when GSM is used (which underlying protocols are involved)?
I'am particularly interested in how the Motorola Accompli008 phone/PDA implements this.
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