User's Manual

2 System Description
Chapter 1 - System Description
1.1 Introducing BreezeMAX
BreezeMAX TDD (BreezeMAX) is Alvarion's WiMAX compatible platform operating
in Time Division Duplex (TDD) mode. It leverages Alvarion's market-leading
knowledge of Broadband Wireless Access (BWA), industry leadership, proven field
experience, and core technologies including many years of experience with OFDM
technology.
Built from the ground up based on the IEEE 802.16/ETSI HIPERMAN standards,
BreezeMAX is designed specifically to meet the unique requirements of the
wireless Metropolitan Area Network (MAN) environment and to deliver broadband
access services to a wide range of customers, including residential, SOHO, SME
and multi-tenant customers. Its Media Access Control (MAC) protocol was
designed for point-to-multipoint broadband wireless access applications,
providing a very efficient use of the wireless spectrum and supporting difficult
user environments. The access and bandwidth allocation mechanisms
accommodate hundreds of subscriber units per channel, with subscriber units
that may support different services to multiple end users.
The system uses OFDM radio technology, which is robust in adverse channel
conditions and enables operation in non line of sight links. This allows easy
installation and improves coverage, while maintaining a high level of spectral
efficiency. n the uplink the system uses OFDMA-16, supporting N x Subscriber
Units per Symbol (N=1 to 16). Modulation and coding can be adapted per burst,
ever striving to achieve a balance between robustness and efficiency in
accordance with prevailing link conditions.
BreezeMAX supports a wide range of network services, including Internet access
(via IP or PPPoE tunneling), VPNs and Voice over IP. Service recognition and
multiple classifiers that can be used for generating various service profiles enable
operators to offer differentiated SLAs with committed QoS for each service profile.
The system supports also IP CS Switching Mode that is compatible with the
infrastructure of next generation WiMAX systems, providing VPN/L2TP support
using a DHCP proxy in the NPU . IP CS Switching Mode provides smooth upgrade
to systems that fully support the IEEE 802.16e standard, with the same “Look
and Feel” of service provisioning.
BreezeMAX offers an innovative solution for a Self-Install CPE, including all the
features, embedded capabilities and supplementary tools that support easy
installation by a non-professional user and fully automated network-entry,
authentication and services provisioning.
The elements that enable and support the Self-Install solution include: