Balazs Bertenyi

Multimedia sessions between 3G wireless and Internet users

The 3/sup rd/ Generation Partnership Project (3GPP), responsible for the standardization of the 3/sup rd/ generation mobile networks, has selected the session initiation protocol (SIP) as the call control protocol and IPv6 as the only network protocol for 3G IP-based wireless networks. Since the existence of IPv4 is predicted to be very long even if Internet starts to switch to IPv6 very soon, it is assumed that sessions between IPv4 only SIP clients and IPv6 only 3G mobile terminals will be needed. Complex translation mechanisms are needed to perform the interworking, this paper shows a complete end-to-end solution for such a mechanism and its performance compared to other implemented translation mechanisms.

SIP-sessions between a 3G-network and a SIP-proxy traversing NAT-PT

Recently the 3rd Generation Partnership Project (3GPP) has selected SIP as the call control protocol and IPv6 as the only network protocol for 3G IP-based wireless networks. As the timeframe for changing/upgrading the current IPv4 devices to IPv6 is difficult to foresee, it is assumed that a session between a SIP-client using IPv4 and a 3G mobile terminal using IPv6 will have to traverse complex translation mechanisms. This paper shows a complete end-to-end solution for such a mechanism.