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StreamCaster MIMO Radio User Manual
4/30/19
10017C000
Silvus Technologies Confidential
Page
133
7.
Wired Backbone
Wired Backbone extends the StreamCaster mesh functionality over LAN (Ethernet) and WAN (Internet)
links. This feature is transparent to end-users - they do not have to re-configure their devices in any
manner to use this feature.
The StreamCaster routing protocol will automatically detect and route data on wired links to preserve air
bandwidth.
7.1
LAN Backbone
The LAN backbone feature allows more than one radio to be connected to a LAN.
7.1.1
Implementation
One of these radios must be configured as a “gateway” radio. This radio then begins li
stening
promiscuously on its ethernet interface to “register” all devices on the LAN as being connected to the
gateway radio. At the same time, it auto-detects other non-gateway radios connected to the LAN and
establishes “wired” links to them. StreamScape
Web GUI will show LAN links with SNR of 150 dB to
differentiate from wireless links.
The non-gateway radios do not register any devices, they merely act as relays. The gateway radio will
forward traffic originating from the LAN, destined for a device attached to a wireless radio, to the non-
gateway radio that is closest to the destination. Similarly, any traffic originating from a device attached to
a remote wireless radio, destined to a device on the LAN will be forwarded by non-gateway radios to the
gateway radio. The gateway radio will then send it to the device.
Currently we support data rates of up to 65 Mbps on the LAN without encryption. Since all LAN traffic
goes via the gateway radio, this is the upper limit of all traffic that can enter or go out of the LAN from/to
devices connected to wireless radios. Of course, this limit does not affect the throughput between two
devices connected directly to the LAN backbone.
7.1.2
Use Case
Consider the following scenario. A business wants to do video monitoring of its grounds. High speed LAN
hookups are available only in the HQ building. They want to use the StreamCaster radios on towers to
provide complete coverage of the grounds. All video feeds are sent back and displayed at the HQ. To
conserve air bandwidth and possible interference to other users, we want video data to go through the
high-speed LAN backbone as much as possible. The below diagram shows the scenario.