Table of Contents
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Chapter 1 - System Description
Aggregate backbone Ethernet connectivity via a 100/1000 Base-T network
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interface.
Traffic classification and connection establishment initiation.
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Policy based data switching.
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Service Level Agreements management.
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Centralized agent in the Base Station to manage all cell site's
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AUs and all registered SUs.
Base Station overall operation control, including AU diagnostic
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and control, PSU monitoring, AVU management and
redundancy support.
Alarms management, including external alarm inputs and activation of
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external devices (future option).
Synchronization, including GPS antenna interface (future option), clock and IF
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reference generation and distribution to the Base Station modules as well as to
other collocated Base Station chassis.
An SNMP agent incorporated into the NPU enables extensive In Band (IB)
management of the Base Station and all its registered SUs. Out Of Band (OOB)
management is supported through a dedicated 10/100 Base-T interface. A serial
RS-232 port supports local configuration, monitoring and debugging.
Two NPU modules can be used to provide a 1+1 redundancy scheme. The
redundancy mechanism, to be supported in future releases, will be based on a
Master <-> Slave principle, where the slave is in passive mode and is constantly
updating all the learning tables and networking parameters of the master card.
1.2.3
Access Unit (AU-IDU)
The double Euro AU-IDU module contains the wireless IEEE
802.16-2004 based MAC and modem and is responsible for the
wireless network connection establishment and for bandwidth
management. Each AU IDU connects to the NPU via the back
plane. In addition, each AU-IDU connects to all other AU/NIU
slots via the back plane over a shared bus for future support of
TDM traffic connectivity.
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System Description
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