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Satellite Communications
Up in the sky! It's a bird. It's a plane. IT'S YOUR DATA!
High bandwidth satellite networks offer many possibilities and opportunities.
Interconnected and integrated with terrestrial networks, satellite links
can provide a wide variety of network services globally and economically,
making the concept of "anytime, anywhere networking " a reality.
However, there are several critical issues related to making network communications
successful in a satellite environment. Among these issues are delay, clock
jitter and bandwidth. Using higher frequency transmissions, such as Ka-band
at up to 30 GHz, bandwidth is becoming less of a constraint as gigabit
and even ten gigabit satellite links are possible. Delay and jitter (due
to Doppler shifting as a result of satellite motion), however, remain
significant problems.
Roundtrip transmission times to and from geosynchronous orbit (GEO) -
where satellites park some 22,300 miles above the equator - are approximately
0.25 of a second, a long time in a communications network! The impacts
of this amount of delay, as well as frequency jitter and other impairments,
on applications can be severe, and must be tested before any satellite-based
communication system is deployed.
Fortunately, Anue's Network Emulators excel at satellite emulation! With
Anue Emulators, you can model delay, jitter and errors dynamically, as
they would occur on a real satellite network.
If you're involved in designing, building or testing any of the following,
Anue Network Emulators can help you by providing satellite emulation capabilities:
* Free-space optics (FSO) - a line-of-sight technology that uses lasers
to provide optical bandwidth connections that can send and receive voice,
video, and data information on invisible beams of light.
* Defense shield - satellite communications are the backbone of the military's
missile defense system, originally known as "Star Wars."
* "Internet in the Sky" - using satellite links as the backbone
for high-capacity network centric global communications systems.
* Global Area Networking - extending broadband services, multimedia, storage,
transaction processing, and ecommerce applications to remote locations.
* Broadband GEO/Broadband LEO solutions - either satellite to ground or
satellite to satellite communications.
Key features of Anue Emulators that are beneficial for testing
satellite transmissions:
* Doppler Shift Emulation - Automatically increase and/or decrease the
delay time injected by the Anue Emulator in increments as small as one
part per million (ppm) to simulate the movement of satellites in relation
to one another.
* Multiple protocol - Anue's products work with SONET/SDH, Gigabit Ethernet,
10 Gigabit Ethernet, Fibre Channel, and 10 Gbps FEC rates.
* Real time full line rate handling of data - up to 10Gbps, regardless
of frame size.
* Enormous amount of delay - With "Delay Doubler," "Delay
Tripler," and even "Delay Quadrupler" options, Anue Satellite
Emulators enable up to
o 50,000 km (31,000 miles) of delay at 2.5 Gbps rates (250 ms)
o 300,000 km (186,000 miles) at one Gbps (1.5 sec), and
o 200,000 km (124,000 miles) at 10 Gbps (1 sec).
Since 1997, Gillaspy Associates has built
a solid reputation for developing strong relationships with our customers
by providing quality solutions and ongoing support.
Downloads
Anue Emulator vs. Fiber Spools
Related Pages
Case Study: Satellite Communications
Learn how Anue Network Emulators are simulating 10 Gbps links between
satellites. More...
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