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Maximized Efficiency for IP Traffic over Inclined Orbit Satellites
Government agencies and service
providers are increasingly using
inclined orbit satellites for the
transmission of data for all of their
applications and services.
The driving factor behind the
transition towards inclined orbit
birds is an OPEX consideration. The inclined satellites provide a good
alternative to reduce the bandwidth cost by half. Another driver is the
need to source bandwidth over regions where satellite capacity is scarce.
In order to extend its life, some operators decide to put the satellite in an
inclined orbit. The switch to inclined orbit operation has repercussions
on the availability of the services as the satellite footprint shifts in a
predictable and continuous pattern.
Therefore it is more essential than ever to implement technology to
optimize the throughput over inclined orbit satellites. This is necessary
to increase margins, keep OPEX under control and to flexibly support
government missions independent of the location around the globe.www.newtec.eu
INCLINED ORBIT SATELLITES
Application Note Inclined Orbit Satellites
The Newtec FlexACM® implementation doubles
the data throughput over inclined orbit satellites at
optimal availability.
Rev.2 09/2014
Inclined orbit satellites can be defined by the fact that they
exhibit an angle other than zero degrees with the equatorial
plane. At the end of a satellite’s life, when station-keeping fuel is
running low there is the option to “go inclined”. Station-keeping
is performed in two directions, East-West and North-South.
Since the equator runs in an East-West direction, with many
adjacent satellites, East-West station-keeping is mandatory.
The North-South station-keeping can be abandoned with the
result that the inclined orbit satellites start to make a figure 8
pattern. On the ground this could be experienced by having
a weaker signal or less throughput during parts of the day
when it is off axis. Most inclined orbit satellites operate up to
6 degrees but in some extreme cases satellites can go up to
15 degrees.
Satellite operators have different drivers to put satellites into
and to keep inclined orbit:
• Extend the life of older satellites
• Opportunity to extend revenues
• Risk mitigation to keep orbital slot until replacement
For service providers and government agencies on the other
hand the inclined orbit satellites give the opportunity to drive
down bandwidth (OPEX) costs.
How it Works
Application Note Inclined Orbit Satellites
East South West
Satellite in fixed orbit
5 years0 years 10 years 15 years
Extending the life of a satellite
by putting it in inclined orbit
Fixed Orbit (10y)
Fixed Orbit (9y) Inclined Orbit (5y)
Figure 1: Inclined Orbit Satellites
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Newtec is a market leader in Trunking, Backhaul and Backbone
networks over satellite and has a track record of VSAT,
government & defense installations worldwide in Ku, Ka and
C-band. In these markets Newtec’s FlexACM platforms have
been the favorite technology of choice for communication
over inclined orbit satellites.
FlexACM is the unique and market proven end-to-end solution
combining DVB-S2/S2X and a set of cutting edge technologies
in order to optimise IP links over satellite at optimal availability.
FlexACM is available on Newtec’s entire product portfolio,
including the Newtec Dialog® platform, Newtec modems and
Network Optimization Software.
In the exercise of keeping OPEX
under control or increasing
margins and revenues, government
agencies and service providers
tend to migrate their services to
inclined orbit satellites. Due to
the link degrading conditions of
these satellites (resulting in less
throughput) the bandwidth is offered at up to a 70% lower
price than normal transponders over the same area.
Thanks to Newtec’s FlexACM the throughput of data, voice
and video can be doubled over inclined orbit satellites within
the same available bandwidth, giving the agencies and service
providers room for extra OPEX cuts.
In fact service providers and government agencies benefit
from two OPEX cut opportunities:
• Up to 70% lower bandwidth price by operating in
inclined orbit mode
• Increasing efficiency by more than 80% over inclined
orbit through Newtec’s FlexACM with possibility for
extra bandwidth cuts
Kings of Inclined OrbitCut Down OPEX Costs by More Than 70%
Application Note Inclined Orbit Satellites
Figure 2: Newtec Satellite Modem Portfolio
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Communication lines over
satellite need to be available at
all times to exchange mission
critical information and to
keep customer satisfaction
at a high level. However, the
footprint shift which comes
naturally with inclined orbit
satellites results in a periodic reduction of throughput and
could cause link losses and packet drops if the correct
technology is not implemented. Receiving conditions could
drop as much as 6 dB, which means that a low modulation
scheme and increased error correction has to be used.
Other effects that occur through inclined orbit operations
are degraded cross-polarization performance, an increased
range variation, range rate and Doppler shift.
FlexACM is the auto-adaptive technology that will switch to
robust modulation when the remote shifts into the fringe of the
satellite footprint. As soon as conditions improve, modulation
switches back to maximum efficiency.
Throughout this operation optimal availability is guaranteed
without link or packet drops. Moreover, through flexible
bandwidth management and Quality of Service management,
priority can be given to mission critical services in order to
keep SLA (Service Level Agreement) requirements.
Optimal Availability
Normal satellite operation in clear weather conditions Zero margin
Inclined Orbit Satellite6 dB
FlexACM
Legacy Modulation (Worst Case Scenario)
Throughput
06:00 12:00 18:00 00:00 06:00 12:00 Time
FlexACM provides optimal availability in order to ensure mission critical information and maintain Service Level Agreements.
INCLINED ORBIT SATELLITE
Application Note Inclined Orbit Satellites
Figure 4: Inclined orbit footprint shiftFigure 3: Double throughput over Inclined Orbit Satellites with Newtec FlexACM technology
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DataData
VoiceVoice
VideoVideo
Zero Margin Level
DVB-S2 CCM Capacity (Legacy)Adaptive Modulation
Variation
Newtec FlexACM+70% Throughput
Distortion
TH
RO
UG
HPU
T
TIME
UPLINK REMOTE
Maximize Throughput in Inclined OrbitIn highly competitive satellite markets with continuous pressure
on pricing and margins, maximum efficiency is key to boost
profitability. Other service providers or government agencies
seek means to increase the throughput in the allocated
bandwidth available to them without increasing capacity.
Newtec’s FlexACM is the communication technology of choice
for many operators and government agencies delivering
services over inclined orbit satellites. FlexACM combines
DVB-S2/S2X with different technologies to get as much data
through the same satellite bandwidth as possible.
FlexACM will auto-adaptively set modulation parameters to the
optimal point and overcomes distortion, noise and variation in
the satellite link. Newtec gets as close to the zero margin level
as possible allowing the full use of the satellite link.
Up until 3 degrees inclination FlexACM can cover for most
of the degradation. Beyond 3 degrees optimal efficiency can
be achieved in combination with third party auto-tracking
antennas. The tracking capabilities allow service providers,
news media and government users to utilize cost-effective
space segment on satellites in inclined orbits.
Application Note Inclined Orbit Satellites
Figure 5: Maximizing availability and throughput
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The fluctuating throughput that
comes along with inclined orbit
satellites tends to frighten away
providers that need to transport
Committed Information Rates (CIR)
services over these satellites.
Newtec is the only provider in
the market with FlexACM, the unique option to provide
both variable as fixed rate throughput in DVB-S2/S2X ACM
(Adaptive Modulation and Coding) to fulfill SLA requirements.
By bringing fixed rates and CIR to ACM, Newtec addresses
the service providers in point-to-multipoint configurations
providing constant throughput at optimal availability in the
most efficient way.
In comparison to legacy and DVB-S2 CCM (Constant Coding
and Modulation) networks, Newtec’s fixed ACM brings more
than 70% extra bandwidth for committed information rates.
The buffer (fluctuating) bandwidth can be used for occasional
services or non-critical information transport over satellite.
Fixed Throughput for Inclined Orbit
Newtec is the only provider in the market to provide CIR (Committed Information Rates) in ACM.
Additional Capacity for Additional Business
FlexACM at fixed rates
CCM VCM
Application Note Inclined Orbit Satellites
Figure 6: Committed information rates for inclined satellite orbits
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FlexACM is the technology of choice in the Newtec product
offering to get more efficiency over (inclined orbit) satellite.
Additional Newtec technologies such as Clean Channel
Technology®, Cross-Layer-Optimization and Bandwidth
Cancellation will additionally boost the performance and
increase the throughput.
• Newtec’s Bandwidth Cancellation also takes care of
inclined orbit operations increasing link efficiency up
to 30%.
• Newtec’s Clean Channel Technology improves links
even further by offering an advanced filter technology
allowing a low roll-off factor (0,05) and optimal carrier
spacing adding a 15% extra efficiency.
• Newtec’s Cross-Layer-Optimization is the combination
and interaction between satellite bandwidth manage-
ment, IP shaping and acceleration technologies in
order to allow maximum throughput at all time.
Above highly congested regions satellite capacity is not always
available. Service providers willing to start up business over
these areas, or government agencies desperately seeking
bandwidth over operational territories to support missions,
tend to consider inclined orbit satellites as an alternative
solution.
Newtec FlexACM technology on the Newtec Dialog platform
and all Newtec modems makes it possible to quickly activate
services over inclined orbit satellites at optimal efficiency and
migrate applications to other satellites as soon as capacity
becomes available.
Drive for More ThroughputFlexible Alternative for Bandwidth over Congested Regions
Dedicated technologies such as FlexACM, Bandwidth Cancellation,
Clean Channel Technology and Cross-Layer-Optimisation maximize
throughput over inclined orbit satellites.
Application Note Inclined Orbit Satellites
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SHAPING THE FUTURE OF SATELLITE COMMUNICATIONS
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