Product Description

Product Description
20 (98) © Nokia Corporation Draft DN991444
Nokia Proprietary and Confidential Issue 3-0 en Draft
Note
The dual band feature enables the operator to configure any sector to operate
either on a 900 or 1800 MHz frequency, thus increasing the capacity of the
network. With CX 3.2 software, or later, the 800/1800 MHz and 800/1900 MHz
dual band frequencies are also possible.
More information on the coverage areas created with different sectoring options
can be found in Section 4.1 in this document.
The term “cell” is used in the network management system (NMS) context,
referring to the coverage area of transceivers from the same base station.
3.1.2 Chaining of Nokia MetroSite EDGE base stations
Internal bus and Abis chaining are both possible with the Nokia MetroSite EDGE
Base Station. For more information on Abis chaining, refer to Section 4.2.
To further increase the capacity expansion possibilities, Nokia MetroSite EDGE
base stations can be chained as one BCF object to include up to 12 TRXs.
Chaining is done by extending the BTS internal buses through the extension
interface on the interface unit. Each BTS is connected to the next BTS in the chain
with only one cable (up to five metres). Only one of the BTSs (the master BTS)
incorporates a transmission unit (FXC type).
One BTS acts as the master BTS, in which the master TRX of the chain is located.
However, each BTS has a dedicated TRX to control the heating and cooling
functions. The chained BTSs share the same frame clock (FCLK) and frame
number and the sector configuration is therefore not limited by the cabinet
boundaries.
The chain can be commissioned in various diversity configurations. For example,
a chain with three BTSs could be configured with two sectors and six TRXs per
sector.
The Nokia MetroSite EDGE Base Station can also be connected to a Nokia
MetroHub Transmission Node. In this case, the BTS cabinet must incorporate a
transmission unit.