Introduction to Internet
Protocol Over Satellite
(IPoS)TIA-1008
Sebastian Coe
TSM 601
Professor Bowman
Sebastian Coe - IPoS (TIA-1008)
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How does IP over Satellite Work?
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Overview


IPoS is governed by TIA standard 1008
It divides the use of IPoS into three main
‘segments’ [1]
(Hughes Network Systems)
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User Segment

Individual PC users have a small outdoor
satellite dish that has a direct ‘line of sight’
orientation towards a satellite in the sky. [6]

Inside, the user has a special modem that
connects the outdoor portion and
indoor portion of the user segment [6]
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User Segment

At the user segment the demodulated IPoS
packets can be ‘rerouted using standard
Ethernet card or wireless communication
techniques such as WLAN.’ [6]

Put simply, once IPoS packets
are on the ground, they can be easily
retransmitted through well known systems
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Hub Segment

The Hub Segment serves as a ‘gateway’ for large
numbers of IPoS users. [1]

It is a ground link between
users, satellites, and the rest of
the networks that make up the
internet
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Hub Segment

The Hub segment is in charge of converting
packets from ‘one protocol to another’. [1]

It is in charge of making sure that traffic is
properly routed through the
network. [1]
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Space Segment


Ku Band Transponders [6]
Bi-directional transmission is possible between
user and hub segments [1]
 Bent
pipe transmission is used [1]
 One hub segment can access multiple
space segments simultaneously [1]
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IPoS Protocol
IPoS protocol is
An extension of IP
It is designed to allow
IP packets to travel
Through a space
Based medium

(Hughes Network Systems)
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Quick Review

IPoS works through the coordination of the
user, hub, and space segments.

IPoS uses space based transponders, it uses
microwaves to transmit information
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Quick Review

IPoS encapsulates IP packets so they can travel
across the satellite network. IP and IPoS work
together, but can be developed separately.

The hub segment has the major task
of bringing together and getting user
information to and from the Internet
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Notes

IPoS allows for up to 155Mbps
bandwidth

Required Equipment: IPoS enabled modem,
user equipped satellite dishes, dedicated satellite
transponders, ground base stations
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References

[1] Hughes Network Systems. HNS-30740. January 2004. “IP Over Satellite (IPoS)” October 12,
2008,
http://www.hughes.com/HUGHES/Doc/0/01LKEPT5PQH43D7PP4NMB9195C/IPOSwhitepaper-Jan2004.pdf

[2] Telecommunications Industry Association. Standards Department. 2008. “About Standards”
October 23, 2008. http://www.tiaonline.org/standards/about/index.cfm

[3] Ciber Habitat. Gobierno de Mexico Satelites Mexicanos. 2008. “Sistema Satmex” October 23,
2008 http://ciberhabitat.gob.mx/medios/satelites/mexicanos/satmex.htm

[4] Project MESA. MESA DTR 70.0008v1.5.4 Technical Report. Technical Specifications Group
SYSTEM. April, 2005. “Technologies with Potential Applicability to Project MESA”. October 12,
2008,
http://www.projectmesa.org/ftp/TSG_SYS/SYS07_Boston_2006/SYS07_07_Technologies%20
with%20Potential%20Applicability%20to%20Project%20MESA%20SYS0070008v154.doc
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References

[6] Viinamaki, Jarkko. Department of Electrical Engineering, Helsinki University of
Technology. “IP Over Satellite”. October 12, 2008, http://www.tml.hut.fi/Opinnot/T109.551/2004/reports/ipoversatellite_v3.doc

[7] Working Party 4B. Draft Revision of Recommendation ITU-R S. 1709. 2006
“Technical Characteristics of Air Interfaces of Global Broadband Satellite Systems.”
October 12, 2008, www.catr.cn/itu/itujy/P020061123539714986882.doc

[8] Universidade de Vigo. Recomendación UIT-R S. 1709-1 Cuestion UIT-R 269/4.
2005-2007 “Características técnicas de las interfaces radioeléctricas para sistemas
mundiales de comunicaciones por satélite en banda ancha” October 12, 2008,
http://webs.uvigo.es/servicios/biblioteca/uit/rec/S/R-REC-S.1709-1-200701I!!PDF-S.pdf
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