Hi, Sorry for posting the question which is not related to J2ME. I have not any replies from other forum, I'd be appreciated if any experts could give me some hints here. When the carriers adopt GPRS and 3G for data transmittion, does it mean the mobile device can connect to the Internet through Packet? and does it need to connect to the WAP gateway for accessing the internet? or we need to use GPRS gateway instead? I am still confused about GPRS. If we do not need WAP gateway, what is WAP 2 concerned? only xHTML? or WAP 2 is only used for WAP browser to let client to navigate the web URL? So, if the carrier adopts i-mode, it does not need WAP 2 also? Please advise. I read a book talking about GPRS. It said that the mobile device internet connection is always on. But, there is a GPRS gateway (GGSN). When should we use WAP, it said that when we want to send packets to the user by using WAP push. Or it can be done with EPOC open platform. Is it? and what is the full name of EPOC? Thanks in advance. Andrew
Joined: Apr 08, 2002
Hi; As i know; If you are using GPRS or whatever; you gotta connect to the WAP GW. By using GGSN and SSGN nodes you reach to the WAP GW. For mobile communication you use WAP protocol only between a mobile and GW, rest is simple HTTP. Only difference between CSD and GPRS is; with CSD you connect only one time slot but with GPRS you can connect different time slots and send/receive information in packet data form. Of course you are always connect to GGSN and SSGN nodes (APNs)you can easily send and receive packets. On the other hand Packet switching means that GPRS radio resources are used only when users are actually sending or receiving data. Rather than dedicating a radio channel to a mobile data user for a fixed period of time..The available radio resource can be concurrently shared between several users. And finally EPOC is a deprecated term. It refers to Symbian OS which is an operating system for mobiles. for more information visit www.symbian.com [ April 08, 2002: Message edited by: Ercan ]
Joined: Nov 12, 2001
Hi Grew, Thanks for your reply. But, I know that we do not need to use WAP gateway except we have to view the WAP sites. Thanks for your help. Andrew
Joined: Dec 04, 2000
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