In article <104460@palm-dev-forum>, [EMAIL PROTECTED] says... > > Agus Silas wrote: > > > > > What kind of application are you writing ? > > > > Actually the application I wrote works fine using the data chanel of > > GSM to transmit GPS position from mobiles to a base. It's sort of > > "point to point" communication. The problem is that the time needed to > > establish a data connection is pretty long, the average is 25 secs, > > plus 5 secs to transmit data (80 bytes) and get the answer (80 bytes), > > another 5 secs to disconnect ( Siemens MT35 GSM modem ) before I can > > call another mobile... So, for 10 mobiles I won't be able to recall > > the first before at least 5 minutes, which is too long... > > Since GPRS allows me to have a permanent connection this will > > eliminate the connection time. That's why we are looking forward to > > use GPRS. We still haven't decided if we are going to use a navigator > > or adapting our actual Palm application to run on GPRS layer instead > > of GSM (although GPRS use GSM). > > Yes, with GSM you have some fixed delay for Connection and Hangup, you can > avoid some time with GPRS, but remember that you will always have some > connection delay due to autentication. > > BTW, how do you plan to connect your different devices using GPRS? > IIRC you can't do a direct connection, but you have to connect to your telco > having back a dynamic IP (that can change, changing the GPRS cell you are > in). Then you can use TCP/IP to connect to the others devices. > With this scenario you have to keep somewhere a list of the IP of all the > connected devices... and this seems a lot different from you current > solution. > > > > > All advises are welcomed... I use CodeWarrior V8.3 and I just > > downloaded SDK 5.0 > > > U R Welcome > > Ciao > > -- > Ing. Pietro F. Maggi > DSM S.p.A. > Via Paganini 34 > 20052 Monza (MI) > Tel.: 039/382183 > Fax: 039/2327759 > E-mail: [EMAIL PROTECTED] > > >
And you Pietro, what are you doing? ;-) dex -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/
