interplanetary internet_sufi
Post on 18-Jul-2015
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Introduction
Objectives
Challenges
Architecture of IPN
Working of Terrestrial Internet
Working of IPN
Terrestrial v/s Celestial Communication
Applications
Conclusion
IPN is a conceived computer network in space,
consisting of a set of network nodes which can
communicate with each other.
IPN is a technical name for ”anywhere and
everywhere internet”.
It aims to provide Internet-like services over the
entire solar system.
Extremely long propagation delay
Asymmetrical forward and reverse Link
capacities
High link error rates for radio-frequency (RF) communication channels
Intermittent link connectivity
Lack of fixed communication infrastructure
Effects of planetary distances on the signal
strength and the protocol design
Power, mass, size, and cost constraints for
communication hardware and protocol design
InterPlanetary Backbone Network
Communication among Earth, outer-space
planets, moons, satellites, relay stations, etc.
InterPlanetary External Network
Space crafts flying in groups in deep space
between planets, clusters of sensor nodes, and
groups of space stations.
Planetary Network
Planetary Satellite Network
Satellites circling the planets provides relay services,
communication & navigation services to surface elements.
Includes links between orbiting satellites & links between
satellite and surface elements.
Planetary Surface Network
Links between high power surface elements (rovers,
landers, etc). Surface elements that cannot directly
talk to satellites, organized in an ad hoc manner.
Network
IP
Network
IP
Phys 1
Link 1 Link 1
Phys 1 Phys 2
Link 2
Phys 2
Link 2
Phys 3
Link 3
App
App
App App
App
App
Network
IP
Transport
TCP
Network
IP
Transport
TCP
Phys 3
Link 3
Subnet 1 Subnet 2 Subnet 3
Network of internets spanning dissimilar environments
Bundle
App
App
App App
App
App
Bundle Bundle
Phys 1
Transport a
Network a
Link 1 Link 1
Phys 1 Phys 2
Link 2
Network a
Phys 3
Link 3
Network b
Transport b
Phys 2
Link 2
Network a
Transport a
Phys 3
Link 3
Network b
Transport b
Internet a Internet b
Working of IPN
Communicatio
n
parameters
Wired
terrestrial
Mobile ad hoc
NET/MANET/
Wireless
IPN/Celestial/
Wireless
Power
availability
Not critical Important Very crucial
SNR Within
acceptable
range
Low Very low
Error rate Within
acceptable
range
Medium High
Infrastructure Defined/fixed Deployable Deployable
Communication
parameters
Wired terrestrial Mobile ad hoc
NET/MANET/
Wireless
IPN/Celestial/
Wireless
Medium Copper/fiber RF/IR Primarily free
space, RF
Delay in seconds <1 10 to 10000
seconds
Deployment cost Low Medium Very high
Operational cost Low Medium Very high
“Non-chatty” message-oriented communications
Essential in long delay environments.
Store-and-forward between nodes
Essential when no contemporaneous end-to-end path exists.
Highly desirable to free resources at less-advantaged “leaf nodes”.
Routing algorithms cognizant of scheduled connectivity
Essential to accommodate scheduled connectivity.
Highly desirable to be able to adaptively exploit alternate routes.
Use transport and network technologies
appropriate to the environment
Essential to support combination of IP and non-IP networks.
Essential to be able to support incremental deployment of new
technologies.
Time-Insensitive Scientific Data Delivery:
-Large volume of scientific data to be collected from planets and moons.
Time-Sensitive Scientific Data Delivery:
-Audio and visual information about the local environment to Earth, in-situ controlling robots, or eventually in-situ astronauts.
Mission Status Telemetry:
- Delivery of the status and the health report of the mission, spacecraft, or the landed vehicles to the mission center or other nodes.
Command and Control:
-Closed-loop command and control of the in-situ mission elements.
With the increasing pace of space
exploration, Earth will distribute large
numbers of robotic vehicles, landers, and
possibly even humans, to asteroids and other
planets in the coming decades.
Possible future missions include
lander/rover/orbiter sets, sample return
missions, aircraft communicating with
orbiters, and outposts of humans or
computers remotely operating rovers.
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