Base Station Equipment; Base Station Chassis; Network Processing Unit (Npu) - Nera WiLink-I Series System Manual

1.2

Base Station Equipment

The Multi Carrier, High Power, Full Duplex Base Station provides all the
functionality necessary to communicate with SUs and to connect to the backbone
of the Service Provider.
The Base Station comprises the following elements:
1.2.1

Base Station Chassis

The Base Station equipment is based on an 8U high cPCI (compact Peripheral
Component Interconnect) shelf
designed for installation in a 19" or 21"
(ETSI) rack. This chassis has a total of
nine double Euro (6U high) slots and
six single Euro (3U high) slots. All the
modules are hot swappable, and high
availability can be provided through
multiple redundancy schemes.
The six single Euro slots are intended
for one or two redundant Power
Interface Units (PIU) and up to four
redundant Power Supply Units (PSUs).
One of the double Euro slots is dedicated to the Network Processing Unit (NPU)
module, supporting a central networking and management architecture. Another
double Euro slot is reserved for an optional redundant NPU (NPU redundancy
support is planned for a future release).
The remaining seven double Euro slots are dedicated mainly for Access Unit (AU)
indoor modules, thus enabling various future redundancy configurations.
Additionally, the Base Station chassis contains an air convection and ventilation
fan tray (AVU).
1.2.2

Network Processing Unit (NPU)

The Network Processing Unit is the "heart" of the WiLink-I Base Station. The NPU
module serves as the central processing unit that manages the base station's
components and the SUs served by it. It also aggregates the traffic from the AU
modules and transfers it to the IP Backbone through a dedicated Gigabit/Fast
Ethernet interface.
The NPU main functions are:
WiLink-I Modular Base Station System Manual
Base Station Equipment
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