System Description

WipLL System Description
9-2 of 9-8 Marconi Communications Ltd. MCIL -WIPLL-SDN_R1_40
9.2. 3.5 GHz ((Not for North America).
• WipLL now provides a Wireless Local Loop (WLL) solution in the licensed
3.5GHz band, as well as 2.4GHz unlicensed ISM frequency band. Previous
releases supported 2.4GHz only.
•
In a point-to-multipoint system, a base station radio communicates with
multiple SPRs, using either Time Division Duplexing (TDD) or Frequency
Division Duplexing (FDD). WipLL release 1.4 now uses FDD mode when
working at 3.5GHz, dividing the available spectrum into two separate
channels, one for upstream the other for downstream.
•
3.5GHz implementation requires new ETSI approved hardware for both the
BSR and SPR.
9.3. External antenna (Not for North America).
•
For 2.4GHz, BSRs are now also available with an N-type connector for
attaching an external antenna instead of the internal antenna as in previous
releases.
Figure 9-1: N-Type Connector
•
External antenna support makes WipLL more flexible and allows WipLL to
fit different scenarios following special customer requests.
•
In order to support an external antenna, new hardware is required for the
BSR. This hardware is ETSI approved.
•
The external antenna may have a gain of 5-15dbi. The customer is
responsible to ensure compliance.