Romantis Satellite Communications UHP-1000 Manual de usuario descargar pdf (Pagina 8)

Field test setup

1.6 Mbit/s

Jperf server ¸SITScope

security

management

system

¸SITLine ETH50

Romantis UHP

Internet

¸SITLine ETH100

Jperf client

¸SITLine ETH50

Romantis UHP

R&S®SITLine ETH devices encrypt without

overhead

All encryption involves transmitting a certain amount of

additional protocol information along with the data. In con-

ventional encryption solutions, this overhead significantly

reduces the available bandwidth. This is not the case with

R&S®SITLineETHencryptors:Theyusecipherfeedback

mode (CFB) encryption, which does not affect the quantity

of data. The transmission costs for encrypted and unen-

crypted data are the same.

Encryption only adds protocol information if integrity

protection is enabled in a fully meshed topology – in

other words, on multipoint-to-multipoint connections in

Galois counter mode (GCM). Even so, this overhead is still

relatively low and has almost no influence on transmis-

sion performance. By contrast, if IPsec encryption is used

to secure communications, it has twice or three times the

overhead.

Proven in the field

A field test has confirmed the bandwidth advantage to be

gained by using R&S®SITLine ETH devices to encrypt satel-

lite communications. The test measured actual bandwidth

using Jperf, an Iperf variant. A satellite network was set up

by Romantis UHP between three locations (A, B and C) at

arateof1.6Mbit/s,fullduplex(busorsharedmedia).The

throughput was then measured between locations A and

B at ten-second intervals over a period of two minutes.

The network traffic at the central location was negligible.

The R&S®SITScope central security management system

was used at location C to configure the R&S®SITLine ETH

devices.

Uncompromising

data protection

SITLine-SATCOM_app-bro_en_3606-8189-92_v0100.indd 8 28.03.2013 11:18:54

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Romantis Satellite Communications UHP-1000 Manual de usuario Pagina 8

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