Page 1 of 13 BreezeACCESS VL BreezeACCESS VL Version 4.0.27 Release Note February 2007 ALVARION LTD. 21A HABARZEL STREET, TEL AVIV, 69710, ISRAEL TEL: 972-3-6456262 FAX: 972-3-6456222 HTTP://WWW.ALVARION.
Page 2 of 13 1 Introduction This release note describes the new features and some problem fixes introduced in SW version 4.0, and the additional features, improvements and problem fixes introduced in the maintenance SW version 4.0.27. 2 Frequency bands The currently supported frequency bands: • 5.725 – 5.850 GHz (5.8 band, FCC) • 5.470 – 5.725 GHz (5.4 band, ETSI) • 5.150 – 5.350 GHz (5.2 band) • 5.250 – 5.350 GHz (5.3 band, FCC) • 4.900-5.100 GHz (4.9 band) 3 Hardware SW Version 4.0.
Page 3 of 13 4.2 Enhanced Support of Voice over IP Implementation of support for DRAP (Dynamic Resources Allocation Protocol) in the Access Unit enables it to communicate with Alvarion’s Gateways that support this protocol. This enables limiting the number of simultaneous voice sessions in the cell through admission control, maintaining high quality of service for voice calls.
Page 4 of 13 4.6 FIPS 197 Support An optional (under license) support of FIPS 197 enables using an encryption algorithm certified for compliance with Federal Information Processing Standards. FIPS 197 licensed feature is available for units with HW revision C or higher, excluding AUS units. 4.7 MAC Address Deny/Allow List The functionality of the MAC Address List has been expanded to enables selection between Deny and Allow actions.
Page 5 of 13 maximum permitted for a certain modulation level (due to either hardware or regulatory restrictions), the actual value will be automatically adapted to the applicable limitation. 4.11 Enhanced AU Tx Control A new option in the AU Tx Control enables automatically shutting down the transmitter when the Ethernet link is disconnected. This feature provides improved redundancy support since the SUs will cease trying to synchronize with this AU and will immediately start searching for another AU.
Page 6 of 13 5 New Features and Improvements Introduced in SW Version 4.0.27 BreezeACCESS WI2 Management Support 5.1 The soon to be introduced BreezeACCESS WI2 system comprises a self-contained combination of an advanced WiFi Access Point and a BreezeACCESS SU-ODU that provides backhaul connectivity.
Page 7 of 13 5.6 Manual Control of Adaptive Noise Immunity Mechanism The Adaptive Noise Immunity (ANI) mechanism is designed to enhance the processing power by reducing the number of errors in the wireless link. This feature, active by default, exists in all units with HW revision C and higher running SW Version 3.0 and higher. With the significant improvements in processing power introduced in SW version 4.
Page 8 of 13 9 Important Notes • BA VL plugged-in modules (AU-BS, and SU-E-BS) work only with BS-SH-VL chassis, and requires a VL power supply (BS-PS-AC/DC). BS-SH-VL chassis can be identified by the label “BreezeACCESS VL/II/XL/4900”on the chassis’s flange arms. AU-BS and SU-E-BS plugged in modules are identified by the label “BS-AU VL/4900”. VL AC and DC power supply units for the chassis are identified by the “BS-PS VL/4900”. • BS-SH-VL chassis can host all GFSK (3Mbps) products at all frequencies.
Page 9 of 13 • Remote changes of the Maximum Modulation Level in an SU while Adaptive Modulation is disabled may lead to lose of connectivity with the unit. The recommended workaround is to enable Adaptive Modulation, reset the unit to apply the change, and then change the Maximum Modulation Level. • Adaptive Modulation may not converge to best modulation in some setups with high variance in noise levels.
Page 10 of 13 • With Version 4.0 higher number of PHY ERR may be reported. The increase of reports is due increase in types of errors detected, especially with HW rev C. This by itself is not affecting the functionality of the units but only showing information that was previously not available. Noisy environment will produce higher number of PHY ERR and these reports can be used to identify noisy channels. • SNMP management was checked with SNMPC version 5.1.11e.
Page 11 of 13 This requirement, although not indicated in the certification document, is needed following the tests performed in the certification lab. • The maximum number of SUs that can be served by an AU when Data Encryption is enabled is 124. The number displayed for the Maximum Number of Associations is the value configured for this parameter, which might be higher than the actual limit, indicated in the Show Air Interface Parameters display.
Page 12 of 13 • In certain scenarios where the CIR/MIR algorithm is used (MIR Only option in the AU is disabled), the system may have a slightly different behavior compared to version 3.1. In these cases a lower throughput of the sector may be evident. If the throughput of the cell is too low and the operator wishes to use the CIR/MIR algorithm, improved performance may be achieved by upgrading only the SUs to SW Version 4, leaving the AU with Version 3.1.
Page 13 of 13 • The Automatic Distance Learning in mixed cells (version 4.0 and version 3.1) and a 10 MHz bandwidth did not operate properly, resulting in reduced performance due to errors in the distance calculations. The problem was solved. • VLAN Relaying did not operate properly – all packets were relayed regardless of their VLAN ID. The problem was solved. • In some scenarios, AUs with HW revision A or B were “stuck”, causing disassociation of all SUs. The problem was solved.
