User Manual
Table Of Contents
- 4Motion System Manual
- About This Manual
- Contents
- Chapter 1 - System Description
- 1.1 About WiMAX
- 1.2 4Motion Solution
- 1.3 The Base Transceiver Station
- 1.4 Element Management Systems
- 1.5 Specifications
- 1.5.1 Modem & Radio
- 1.5.2 Sensitivity (per channel)*
- 1.5.3 ODUs
- 1.5.4 Micro Outdoor BTS
- 1.5.5 AU - ODU Communication (Macro BTS)
- 1.5.6 Data Communication (Ethernet Interfaces)
- 1.5.7 Configuration and Management
- 1.5.8 Standards Compliance, General
- 1.5.9 Environmental
- 1.5.10 Mechanical and Electrical
- 1.5.11 Antennas
- Chapter 2 - Commissioning of the Macro BTS
- 2.1 Initial NPU Configuration
- 2.2 Completing the Site Configuration Using AlvariSTAR
- Chapter 3 - Operation and Administration of the Macro BTS
- 3.1 Using the Command Line Interface
- 3.1.1 Managing the Macro Outdoor BTS
- 3.1.2 Accessing the CLI
- 3.1.3 Command Modes
- 3.1.4 Interpreting the Command Syntax
- 3.1.5 Using the CLI
- 3.1.6 Managing Users and Privileges
- 3.1.7 Managing Secure Shell (SSH) Parameters
- 3.1.8 Managing the Session
- 3.2 Managing Software Upgrade
- 3.1 Using the Command Line Interface
Chapter 1 - System Description The Base Transceiver Station
4Motion 23 System Manual
Feeder unit can serve up to four ODUs. Up to three ODU Power Feeder units can
be installed in a 1U high Power Feeder panel.
1.3.6 Antenna
In the 4Motion architecture, the antenna is approached as an independent
element. This provides the operator with the flexibility to select the antennas
source according to its supplier policy. To ensure the availability of antennas that
complement the 4Motion solution, Alvarion works closely with several antenna
suppliers to ensure availability of antennas that comply with its requirements.
In cases where the operator prefers other antenna vendors, Alvarion can provide a
recommended antenna specification based on the required antennas types.
For more information on recommended antenna configurations and required
antennas refer to “Sector Connections Schemes” on page 744.
1.3.7 GPS
GPS is used to synchronize the air link frames of Intra-site and Inter-site located
Base Transceiver Stations to ensure that in all Base Stations the air frame will
start at the same time, and that all Base Stations will switch from transmit
(downlink) to receive (uplink) at the same time. This synchronization is necessary
to prevent Intra-site and Inter-site interference and Base stations saturation
(assuming that all Base Stations are operating with the same frame size and with
the same DL/UL ratio).
In order for the system to be synchronized, the GPS have to first acquire at least 4
satellites. After that the GPS reception can be reduced to 1 satellite. If no satellite
is received the BTS will go to holdover state where internal clock is provided to
synchronize the BTS.
1.3.7.1 Outdoor GPS Receiver for the Macro BTS
The all-outdoor GPS Receiver is a pole mountable GPS receiver and antenna in a
single environmentally protected enclosure. The receiver is powered from the NPU,
and it can be installed at a distance of up to 100m from the NPU. In the
BMAX-Timing GPS-OGR model, a special adaptor cable is required between the
GPS cable and the NPU. When available, no adaptor cable will be required for the
BMAX-4M-GPS.
1.3.7.2 GPS Antenna Kit for the Micro BTS
The Micro BTS includes an internal GPS receiver with hold over mechanism in
case GPS is lost or satellites synchronization was not reached.