User's Manual

Open Information
DESCRIPTION 3 ( 19 )
ERA/RGN/PD Rikard Schönbeck 5/1551-HRB 105 102/1 Uen
ERA/RGG/TOC Jan Lundkvist 2002-05-28 B
Prepared (also subject responsible if other) No
Approved Checked Date Rev Reference
E
2 RAN Overview
An RBS is part of the WCDMA RAN and provides the air interface between the
RAN and User Equipment (UE). figure 1 shows an overview of the RAN, Core
Network (CN) and Network Management Systems.
Figure 1 Radio Network Overview
The WCDMA RAN consists of the following parts:
• Core Network
The CN is not included within the RAN. It interacts with the RNC and
provides support for the network features and telecommunication services.
The CN is also responsible for providing call control as well as mobility
for, and localization of the User Equipment (UE). The CN handles both
packet-oriented services, such as data, and circuit-oriented services,
such as speech.
• RNC
The RNC manages radio links, carrying for example voice or data. The
RNC also manages and optimizes the radio network resources and
controls mobility. A single RNC can connect to one or more RBSs. An
RNC can also be connected to other RNCs to increase capacity.
The RNC is also connected to the core network. O&M is handled through
embedded management and handles: configuration, fault, performance,
and security management. For detailed information regarding the RNC,
please refer to
Node Description, RNC 3810, 6/1551–AXD10503/1.
• RBS
A detailed overview of RBS is given in section 2.1.
• RANOS
RANOS is a software package for handling RAN O&M tasks. RANOS gives
a consolidated view of RAN information such as: alarms, configuration and
basic performance. RANOS also provides several interfaces for integration
within an existing network management environment.
• TRAM
Tools for Radio Access Management (TRAM) gives support for planning,
test, and performance monitoring of the radio and transport network.
The resulting configuration data from the TRAM design is downloaded to
the nodes using RANOS.