I think that it should be like this: SDP on the top and instead of GSM I would write GPRS, and I would insert instead of other layers and MAC I would insert GTP as the one that combines all layers
(SDP) --------------- SIP ---------------- TCP/UDP ----------- IP (v4 or v6) ----------- GTP -------------- GPRS/WCDMA - Air interface -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Tuesday, April 05, 2005 12:34 PM To: [EMAIL PROTECTED]; [email protected] Subject: RE: [Sip-implementors] SIP with Cellular Phones Hi, 3GPP and 3GPP2 are the standards body that define specifications for mobile phones. It envisons a mobile environment built on IP-based communications network. SIP is the main protocol selected for multimedia communications (release 5). The underlying protocol would be UMTS or WCDMA. The figure relating to OSI model would look something like: SIP ---------------- TCP/UDP ----------- IP (v4 or v6) ----------- other layers ------------- MAC -------------- GSM/WCDMA - Air interface Please correct me if I am wrong. Regards, Sai. PS: www.3gpp.org, www.3gpp2.org ________________________________ From: [EMAIL PROTECTED] on behalf of Vivienne Curran Sent: Mon 4/4/2005 11:42 PM To: [email protected] Subject: [Sip-implementors] SIP with Cellular Phones Hello, I am not sure if this is the correct list to be asking but anyhow!... I am reading about personal mobility at the moment whereby a user can have one "number" and can be reached on any device. One the devices can be a mobile phone. However I am confused as to how a sip call would be delivered to a mobile phone or what technologies are used for this. If someone could shed some light on this, I would greatly appreciate it. Your sincerely, Vivienne, Send instant messages to your online friends http://uk.messenger.yahoo.com _______________________________________________ Sip-implementors mailing list [email protected] http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors Confidentiality Notice The information contained in this electronic message and any attachments to this message are intended for the exclusive use of the addressee(s) and may contain confidential or privileged information. If you are not the intended recipient, please notify the sender at Wipro or [EMAIL PROTECTED] immediately and destroy all copies of this message and any attachments. _______________________________________________ Sip-implementors mailing list [email protected] http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors _______________________________________________ Sip-implementors mailing list [email protected] http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
