Alvarion BreezeACCESS VL 5.4, Системное руководство

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BreezeACCESS VL System Manual
2-2
Introducing BreezeACCESS VL
BreezeACCESS VL is a high capacity, IP services oriented Broadband
Wireless Access system. The system employs wireless packet switched data
technology to support high-speed IP services including fast Internet and
Virtual Private Networks. BreezeACCESS users are provided with a
network connection that is always on, supporting immediate access to the
Internet and other IP services at data rates of up to 54Mbps. The system is
designed for cellular-like deployment, enabling the system architecture to
vary in size and structure. A system can include any number of cells, each
containing several Access Units for better coverage of densely populated
areas.
The system supports Virtual LANs based on IEEE 802.1Q, enabling secure
operation and Virtual Private Network (VPN) services and enabling
tele-workers or remote offices to conveniently access their enterprise
network. The system supports layer-2 traffic prioritization based on
IEEE 802.1p and layer-3 traffic prioritization based on IP ToS (RFC791).
BreezeACCESS VL products operate in unlicensed frequency bands in
Time Division Duplex (TDD) mode, using Orthogonal Frequency Division
Multiplexing (OFDM) modulation with Forward Error Correction (FEC)
coding and Time Division Multiple Access (TDMA) radios. Using the
enhanced multi-path resistance capabilities of OFDM modem technology,
BreezeACCESS VL enables operation in near and non-line-of-sight (NLOS)
environments. These qualities enable service providers to reach a
previously-inaccessible and broader segment of the subscriber population.
BreezeACCESS VL is designed to enable construction of “mixed” cells,
where it can be used together with unlicensed BreezeACCESS products
using GFSK modulation, including BreezeACCESS II that operates in the
2.4 GHz band and BreezeACCESS V systems in the 5.7 GHz band.
BreezeACCESS VL products are currently available in the 5 GHz frequency
band, as shown in table Table 2-1.
Table 2-1
:
BreezeACCESS VL Frequency Bands
Series Frequency Band (GHz)
BreezeACCESS VL 5.4 5.725-5.850
BreezeACCESS VL 5.4 5.470 – 5.725
The actual operating frequencies used by the system can be configured
according to applicable radio regulations and specific deployment
considerations.