Improved UMTS radio access network based on the Internet Protocol

摘要

In a UTRAN for an all-IP UMTS, an RNC 26 is arranged to set up IP tunnels across the Iub interface to the Node Bs 24 it controls, or across the Iur interface to other RNCs 28. Selected transport channels pass through the IP tunnels, encapsulated in IP packets. The transport channels may be multiplexed, or dedicated IP tunnels may be set up for each selected transport channel.