User's Manual

Open Information
DESCRIPTION 4 ( 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
2.1 RBS Overview
The RBS provides radio resources and maintains the radio links to the UE
within cells. O&M is handled through embedded management and deal with
issues such as: configuration, fault, performance, and security management.
Common Platform
The RBS hardware and software are based on a common platform used both
in RBS and RNC. From this platform it is possible to create an Asynchronous
Transfer Mode (ATM) cell-switching network node. The common platform
consists of an ATM transport system, a distributed real-time telecommunication
control system, and an element management system built with Java technology.
ATM is used for communication between boards, subracks and nodes.
Hardware
The RBS comprises at least of one cabinet with three subracks: Baseband
(BB), Radio Frequency (RF) and Multiple Carrier Power Amplifier (MCPA)
Subracks. The capacitor unit (CU) is a subrack external unit.
Software
The RBS software architecture consists of two layers: the common platform
layer and the application program layer:
• The common platform layer provides basic support for the application
program and includes the operating system and provides support for
ATM transport, and O&M.
• The application program runs on top of the common platform layer and
defines the RBS functionality.
A Main Processor (MP) executes the RBS software.
2.2 Main Services and Functions
The RBS provides radio resources for the RAN. It provides radio transmission
and reception in one or more cells. The RBS functionality is divided into traffic
and O&M functions:
• The traffic related functions handle the communication with the RNC
and the UE. This also includes the handling of cells, transport channels,
and ATM links.
• The O&M functions ensure that the system becomes and remains
operational, handles equipment malfunctions, and monitors the RBS
performance.
2.3 RBS Characteristics and Configurations
The RBS has a CE marking and fulfills requirements set by various certifying
bodies for Radio Frequency, EMC etc. For detailed information on product