Corporate Overview english color

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Network Design Considerations for Satellite
Communication Networks
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Satellite Communication Applications/Attributes

• Satellite technology is the fastest way to get
  a new reliable connection from A to B in an
  emergency situation.
• Different satellite systems in on the market,
  what to use?
• Inmarsat or similar
• DVB-RCS
• TDM / TDMA
• SCPC / MCPC
• SCPC / DAMA
• TDMA / DAMA

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Satellite communication

• A satellite connection consist of several items
  involved
• Satellite equipment on the remote site. (The UN
  office)
• A Satellite earth station (HUB)
• Terrestrial or satellite connection to the
  UNRegional Office and/or Commando
• Center for the operation
• And/or a terrestrial or satellite connection from
  the HUB/the remote office to the
• UN HQ
• Bandwidth requirement and period
• Services required, QS required, simultaneous
  traffic required, .. Traffic pattern
• Router, PABX, QS .. (Equipment at the Service
  Level)
• Operation / SLA (Service Level Agreement)
• .

• It can look-alike! But Price..

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Satellite footprints
W3WIDE.DCr
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DVB - RCS
Internet
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DVB-RCS Users
E-Learning
Telemedicine
Push media
Media
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DVB-RCS

• Standardisation
• DVB-RCS compliant terminals can speak to all
  DVB-RCS compliant Gateways.
• The terminal is primarily a slave and the Gateway
  is in charge of efficient resource utilisation,
  fair sharing of resources and optimising
  performance.

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DBV-RCS

• A DVB/RCS user will typically require Internet
  access on best effort basis.
• He will not run a time critical application
  (i.e.video).
• This customer must accept limited/occasional
  accessibility due to the shared usage of the
  capacity.
• He has no need for dedicated channel, and his
  applications are not time critical.
• He must accept shared use of common
  infrastructure with other users.
• If there is a need for crypto, the crypto
  equipment will need to synchronies each time the
  remote terminal make a connection.
• A good solution if Internet Data is the most
  important services and a best effort service is
  what the users require. VoIP can be used as a
  additional service and with limited usage of
  voice service DVB-RCS can still be a type of
  service that a very small office.

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Fixed Satellite Technology Options

• TDM/TDMA
• Traditional data VSAT systems
• Low cost remotes, expensive hub
• Star network topology
• Transactional data
• Credit card validation/POS
• Gaming / Internet
• Low user data rate

Frequency
Time
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TDM/TDMA

• TDMA has typical been used as a VSAT DATA network
• TDMA has the same limitations as a DVB-RCS system.

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Fixed Satellite Technology Options

• SCPC/MCPC (FDMA, Frequency divided multiple
  access)
• Point-to-Point
• IDR DCME(compression)
• Gateways
• Uplinks
• Fixed bandwidth
• Broadcast Audio/Video
• Static traffic patterns

Frequency
Time
12
SCPC / MCPC

• A typical SCPC customer runs business critical
  real time applications.
• This customer has high requirements to QoS.
• He also typically runs a wide range of services
  such as voice, video, Internet, ERP systems.
• Crypto equipment will have no difficulties in
  this environment, as there are dedicated channels
  that are always on.
• This customer demands a fixed Star network, which
  will fulfil the requirements he operates in that
  might be difficult to predict in advance
  (especially geographically diversity).
• Technology typically used as a Star VSAT Network
  or as Point to Point connection, (SCPC duplex)
• This customer dos not have the need for
  occasional bursting or accept to pay for the
  bandwidth required.

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Fixed Satellite Technology Options

• SCPC/DAMA
• Centralized Net Mgmt
• Star and Mesh
• Low cost remotes
• One modem/Interface per channel
• Large gateways required

Frequency
Time
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SCPC / DAMA

• A typical SCPC / DAMA user, runs business
  critical real time applications, but has to make
  sure that the application allows the DAMA system
  to burst (increase or decrease the bandwidth). Or
  use dedicated bandwidth for the RTA when required
  (When the application is in use).
• This customer has high requirements to QoS.
• He also typically runs a wide range of services
  such as voice, video, Internet, ERP systems.
• Crypto equipment will have no difficulties in
  this environment.
• This customer demands a flexible network, which
  will fulfil the requirements he operates in that
  might be difficult to predict in advance
  (especially geographically diversity) and have a
  demand / need of bursting (higher data rate if
  available).
• Technology typically used for a VSAT Network as
  Star or/and Mesh, with a number of remote
  terminals that cheers the total allocated
  bandwidth pool (Inbound).
• In cases where there is time diversity between
  the remote terminals, the DAMA functionality
  improves the efficiency and utilisation of space
  segment.
• He also wants a dedicated network/bandwidth with
  no sharing of resources with other customers.

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Satellite Technology Options

• TDMA/DAMA
• Star/Mesh/Hybrid networks
• Multimedia, multiservice
• Efficient space segment utilization
• Easily expand network and site capability

Frequency
Time

Traditional TDMA uses only 1 carrier
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Satellite Technology Options
SCPC DAMA
Frequency
Time
Frequency
Time
Sample when a SCPC system is cost-effective
Sample when a DAMA system is cost-effective If is
a number of sites in a VSAT Network
One block 64 Kbps
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Summary

• Satellite technology is the fastest way to get a
  reliable connection from A to B in an emergency
  situation.
• Different satellite systems in on the market,
  what to use?
• Inmarsat (or similar) YES
• DVB-RCS No
• TDM / TDMA No
• SCPC / MCPC YES
• SCPC / DAMA YES
• TDMA / DAMA No
• Both a SCPC and a DAMA solution can be used in an
  emergency situation as a VSAT connection. Both
  technologies can be used as a FlyAway (Quick
  deploy) system. Both systems can run the same
  services.
• The most important will be to evaluate and select
  the technology that quickly can give you access
  to the Wan that you will communicate with and
  with the quality and security that you require.
  You also have to make sure that bandwidth is
  available.