User's Guide

Nortel Networks Confidential
7
About the iBTS
Nortel Networks UTRAN solution
iRNC
The iRNC is the e--mobility Internet RNC. It is the 3GPP--compliant UMTS RNC developed by Nortel
Networks. The generic term iRNC is used throughout this document to designate the e--mobility Internet
RNC.
The iRNC allows mobility between UMTS and GSM networks.
The main functions of the iRNC are to control and manage:
the RAN (Radio Access Network)
the signaling between the different CN elements and the RNS
the node Bs
the radio resources of the corresponding node Bs.
The iRNC houses the following cabinets:
the C--Node (Control Node)
The C--Node is an ATM--based engine that support UMTS call processing and signaling as well as
OAM of both the RNC and the node Bs.
the I--Node (Interface Node)
This is based onPassport 15000. It is a high--capacity ATM switch, in charge of the connectivity (User
Plane) of the iRNC.
the Access Node
This optionalcabinet is used for a PCMx configuration.It isa Passport 7480 switch. The main function
of the Access Node is to convert the STM1 links into PCM links and vice versa.
iBTS
The iBTS is the e--mobility Internet BTS. It is the 3GPP--compliant UMTS node developed by Nortel
Networks. The generic term iBTS is used throughout this document to designate the e--mobility Internet
BTS.
The following types of iBTS are available:
e--mobility Internet BTS ---- indoor version (600 and 700)
e--mobility Internet BTS ---- outdoor version