Rohde & Schwarz R&S®SITLine ETH: Encryption for Romantis UHP-based satellite networks 11
Appendix
UHP
Universal hardware platform (UHP)
Romantis UHP
UHP X000 VSAT platform overview
❙ Operating modes: SCPC, TDM/SCPC, TDM/TDMA,
TDMA full mesh
❙ All network topologies: point-to-point, start, hybrid,
full mesh
❙ High-speedcommunicationsatupto85Mbit/s
per terminal
❙ DVB-S2VSATtechnologywithbandwidth-efcient
LDPCcodeconTDMAchannel
❙ InnovativeTDMAprotocolwithprovenefciencyof96%
❙ Built-inadaptive500-channeltrafcmanager,
speciallydesignedforVSATapplications
❙ Low-latencyVSATsystemwithmaximum
round-tripdelayof570ms
❙ VLANsupport,multilevelqualityofservice(QoS),
codec-independenthandlingofrealtimetrafc
❙ Web-based network management system
❙ Low power consumption enables operation with various
power sources
Key functions
❙ One device for all levels in the network hierarchy
❙ All-IPVSATtechnologywithnounnecessaryinterleaving
❙ Industry-leadingefciencyandbandwidthutilization
❙ All topologies and operating modes
❙ Adaptive TDMA algorithm for high throughput
❙ Multilevel,adaptiveQoSmechanism
❙ High throughput and routing performance
❙ Easy to install and operate
❙ User-friendlysoftwareconguration
❙ Industry-leading low cost of ownership
❙ Fast network setup
VPN
Virtualprivatenetworks(VPN)onexistingnetworkcon-
nections always generate overlay networks with their own
routingandstructures.Ideally,aVPNshouldmakemaxi-
mum use of the available connectivity and avoid incurring
additional operating costs. However, in a worst-case sce-
nario,aVPNcancausepacketstotraversemorenetwork
nodes and even satellite hops on the way to a destination
than would be the case on an unencrypted connection.
An example: A network consisting of locations A, B and
C is fully meshed, allowing each to communicate with
any of the others directly. If encryption is applied or a
VPNisrunonthenetworkandtheVPNonlyknowstwo
routes–AtoBandAtoC–anydatatrafficbetweenB
andCalwayshastoberoutedthroughA.VPNsshould
be capable of supporting the routing mechanisms avail-
able in advanced network structures instead of establish-
ingtheirownlinks.R&S®SITLineETHsupportsallnetwork
topologies.
VSAT
Averysmallapertureterminal(VSAT)serviceisatypeof
satellitesystemusedinmobileapplications.VSATanten-
nashaveadiameterof<2mfortheKaband,<4mfor
theKubandand<8mfortheCband.
QoS
Qualityofservice(QoS)isamethodofclassifyingdata
streams and assigning different processing priorities to
them.VoiceoverIP,forinstance,isrealtimetrafficand
requires the very highest priority, whereas file transfers
and e-mail (both classic store-and-forward applications)
are given a lower transmission priority. At the IP level, spe-
cial fields in IP headers are available for prioritizing packets
accordingtoQoS.
UnderIEEE802.1p,EthernetalsoprovidesQoSfields.
Romantis UHP manages the bandwidth for different
types of transmissions based on these fields. Band-
width is reserved specifically for high-priority network
traffic. Lower-priority Ethernet frames are processed
opportunistically.
TherouterstransmitanIPpacket'sQoSmarkerinthe
Ethernet frame, allowing the marker to be evaluated even
if an Ethernet link is encrypted.
SITLine-SATCOM_app-bro_en_3606-8189-92_v0100.indd 11 28.03.2013 11:18:54
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