BelAir20E User Guide
Mobile Backhaul Point-to-point Links
April 2, 2012
Confidential
Document Number BDTM02201-A01 Standard
Mobile Backhaul Point-to-point Links
This feature extends the BelAir Networks fixed wireless infrastructure onto
low-speed vehicles such as ships travelling near a sea port. A BelAir node with
mobile backhaul point-to-point links provides redundant high-performance
broadband connectivity.
In such a deployment, the mobile node mounted on a ship acts as a subscriber
station to a stationary base station node mounted on shore.
A subscriber station searches for base station links on a pre-defined set of
channels. It creates up to two links, a primary link and a secondary link, when it
finds a base station advertising available links with an appropriate mobile link
identifier and privacy settings. Once a primary link and a secondary link are
created, one is used for active communications while the other acts as a
standby.
If the signal strength of the active link falls below a threshold, then the standby
becomes the primary link and the subscriber station searches for a new
secondary link.
If performance degrades on the active and standby links, the subscriber station
searches for new base station links with better signal strength.
In addition to providing mobile links, a base station node can also provide links
to other stationary base stations. Mobile link pairs can only be used by one
subscriber station. The links of a base station are configured to operate on one
channel only.
The user defines a channel list that determines the channels that the subscriber
station uses to scan for base station nodes.
Subscriber stations support partial matches to the mobile link identifier. For
example, a subscriber station scanning for a mobile identifier of
mobilityTest
accepts a base station link advertising a mobile link identifier of
mobilityTestBsLink28
.
The
set home-check
CLI command forces a subscriber station to connect to
specific base station links. When home check is enabled, the subscriber station
accepts only base station links that advertise a mobile link identifier that is
exactly the same as the subscriber station’s home-check identifier.
If the mobile backhaul units (subscriber stations and their stationary base
stations) are part of a larger network of BelAir equipment, make sure the