Introduction to Internet Protocol Over Satellite (IPoS)TIA-1008

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Presentation transcript:

Introduction to Internet Protocol Over Satellite (IPoS)TIA-1008 Sebastian Coe TSM 601 Professor Bowman Sebastian Coe - IPoS (TIA-1008)

How does IP over Satellite Work? Sebastian Coe - IPoS (TIA-1008)

Sebastian Coe - IPoS (TIA-1008) Overview IPoS is governed by TIA standard 1008 It divides the use of IPoS into three main ‘segments’ [1] TIA stands for Telecommunications Industry Association Also accepted by ETSI and ITU (Hughes Network Systems) Sebastian Coe - IPoS (TIA-1008)

Sebastian Coe - IPoS (TIA-1008) 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] Bigger satellite dishes provide better signal reception and coverage. Sebastian Coe - IPoS (TIA-1008)

Sebastian Coe - IPoS (TIA-1008) 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 WLAN such as Wi-Fi. Sebastian Coe - IPoS (TIA-1008)

Sebastian Coe - IPoS (TIA-1008) 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 The Hub segment can link thousands of satellite dish users through many satellites that are transmitting and receiving simultaneously. In reality, more than the satellites themselves, we should refer to transponders. Sebastian Coe - IPoS (TIA-1008)

Sebastian Coe - IPoS (TIA-1008) 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] Without the hub segment, IPoS would not work as it does, and point-to-point communications would be required. Sebastian Coe - IPoS (TIA-1008)

Sebastian Coe - IPoS (TIA-1008) 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] Ku band “11,7-12,2 GHz downlink, 14,0-14,5 GHz uplink” [6] Bent pipe transmission means that the satellite transponder is simply used as a relay, information goes to the transponder and back down to the hub station as if it went in and out a pipe. Sebastian Coe - IPoS (TIA-1008)

Sebastian Coe - IPoS (TIA-1008) IPoS Protocol IPoS protocol is An extension of IP It is designed to allow IP packets to travel Through a space Based medium The Satellite Independent Layers and Satellite Dependent Layers can be improved upon in a separate fashion. (Hughes Network Systems) Sebastian Coe - IPoS (TIA-1008)

Sebastian Coe - IPoS (TIA-1008) 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 Presentation 1 also makes extension mention to many of the basic principals that underlie the workings of IPoS Sebastian Coe - IPoS (TIA-1008)

Sebastian Coe - IPoS (TIA-1008) 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 The hub segment is what differentiates IPoS from other satellite based internet systems as it permits the true ad-hoc nature of the users use of satellites for communication through the internet. Sebastian Coe - IPoS (TIA-1008)

Sebastian Coe - IPoS (TIA-1008) Notes IPoS allows for up to 155Mbps bandwidth Required Equipment: IPoS enabled modem, user equipped satellite dishes, dedicated satellite transponders, ground base stations Sebastian Coe - IPoS (TIA-1008)

Sebastian Coe - IPoS (TIA-1008) References [1] Hughes Network Systems. HNS-30740. January 2004. “IP Over Satellite (IPoS)” October 12, 2008, http://www.hughes.com/HUGHES/Doc/0/01LKEPT5PQH43D7PP4NMB9195C/IPOS-whitepaper-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%20with%20Potential%20Applicability%20to%20Project%20MESA%20SYS0070008v154.doc Sebastian Coe - IPoS (TIA-1008)

Sebastian Coe - IPoS (TIA-1008) References [6] Viinamaki, Jarkko. Department of Electrical Engineering, Helsinki University of Technology. “IP Over Satellite”. October 12, 2008, http://www.tml.hut.fi/Opinnot/T-109.551/2004/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.1709-1-200701-I!!PDF-S.pdf Sebastian Coe - IPoS (TIA-1008)