Overview of Space In-ternet Development

PlanNovember 14, 2014

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Korea Lunar Exploration Plan

Step 1Test Lunar orbiter(KPLO) will be manufactured by Korea

KPLO: Korean Pathfinder Lunar Orbiter

Launch vehicle will be used foreign onesLaunch date: end of 2017

Step 2Lunar orbiter, Lander and Rover will be manufactured by KoreaLaunch vehicle will be manufactured by Korea alsoLaunch date: end of 2020

ResponsibilityKARI is responsible for overall Korea lunar projectETRI is responsible for DTN development and validation

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DTN Mission

DTN is a test missionDTN communications are separated with KPLO mission communica-tions

DTN validationDTN technologies will be validated through KPLO for next Lunar mis-sion

Test configurationKPLO will be a DTN nodeLander and Rover are located in the ground for the tests

Lander: ground communication modelRover: ground test model

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Test Configuration

DSN

Lander model

Source

KPLO

Destination

MCC

DTN node

DTN node

Earth

Internet

RCC

Rover model

DTN node

Moon

DTN test configuration through KPLO

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Data Flow

RCC → Rover

Link Protocols

L1 BP over terrestrial network

L2/L5 BP/LTP over SLE

L3/L4 BP over TM/TC

L6 BP over terrestrial network

L7 BP over Proximity-1

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Data Flow

Rover → RCC

Link Protocols

L1 BP over Proximity-1

L2.1(TM)L2.2(image)

BP over terrestrial network

L3/L6 BP over SLE

L4/L5 BP over TM/TC

L7 BP over terrestrial network

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Design of proximity space links

What ETRI is doingPossible definition of new operating frequency bandsProfiling of proximity-1 features which should be necessarily imple-mented for Korean space internet w.r.t. SWaPDefinition of optimized Proximity-1 protocol parameters under the consideration of lunar communication environmentsEnhancement of existing proximity-1 to support broadband service

High order modulations (GMSK, etc)New FEC schemes (LDPC with longer block size, turbo code, etc), etc

Possible consideration of interoperability with proximity-1 links in in-ternational space projects

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