Information AboutUtran |
|
The UTRAN contains the base stations, which are called Node Bs, and Radio Network Controllers (RNC). The RNC provides control functionalities for one or more Node Bs. A Node B and an RNC can be the same device, although typical implementations have a seperate RNC located in a central office serving multiple Node B's. Despite the fact that they do not have to be physically seperated, there is a logical interface between them known as the Iub. The RNC and its corresponding Node Bs are called the Radio Network Subsystem (RNS). There can be more than one RNS present in an UTRAN. There are four interfaces connecting the UTRAN internally or externally to other functional entities: lu, Uu, lub and lur. The lu interface is an external interface that connects the RNC to the Core Network (CN). The Uu is also external, connecting the Node B with the User Equipment (UE). The lub is an internal interface connecting the RNC with the Node B. And at last there is the lur interface which is an internal interface most of the time, but can, exceptionally be an external interface too for some network architectures. The lur connects two RNCs with eachother. |
|
|