Base Station Equipment - Nera WILINK I 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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