© 2004 The MITRE Corporation. All rights reserved

Cislunar WG

CCSDS Toulouse

November 2004

© 2004 The MITRE Corporation. All rights reserved

Cislunar Goals

Create a top-level architecture and operations concept for communicating effectively over the whole range of cislunar distances.

Review current and emerging CCSDS standards and recommend any updates required to keep them current.

Examine the spectrum of new Internet development activities that are proceeding, and identify where they may be applicable to cislunar

Recommend standards for cislunar communications.

Define architecture that handles:– Voice/video (realtime and non-realtime)– Data (realtime and non-realtime)

Between Earth and Moon (RTT ~2.5s) Extensible to Mars (RTT ~ 8--40 minutes)

© 2004 The MITRE Corporation. All rights reserved

Cislunar Activities

Green book describing– Architecture– Operations Concept

Interface with C3I activity Paper describing candidate protocols

Review of applicable CCSDS Protocols– SCPS-TP Updates

© 2004 The MITRE Corporation. All rights reserved

Starting from…

Subnet

PathService

BitstreamService

VirtualChannelAccessService

VirtualChannel

DataUnit

InsertService

Physical Channel

Virtual Channel

SubnetSubnet Subnet MultiplexingBit

stream

Packet Transfer

Onboard Network Space Link Subnetwork

IP

Internet

PathProtocol

InternetService

ApplicationServices

Encap.

EncapsulationService

InternetInternet

Packet Transfer

Treat CCSDS channel

access services as

interfaces to IP

© 2004 The MITRE Corporation. All rights reserved

And recognizing ongoing work in the IETF… The Stream Control Transmission Protocol SCTP. The Datagram Congestion Control Protocol (DCCP). Voice Over IP (VOIP). Disruption Tolerant Networking (DTN). LEMONADE enhancements to Internet email to support

diverse service environments. Internet over Digital Broadcast Video Networks.

© 2004 The MITRE Corporation. All rights reserved

IP-Based Communications Architecture

Single packet-switched network carrying:– Voice (over IP)– data– HDTV

Quality of Service– Protect life-critical and mission-critical

data from congestion– QoS options (not mutually exclusive)

Manually set up class-based queueing classes

Integrated Services Differentiated Services Standard IP TOS

© 2004 The MITRE Corporation. All rights reserved

“Draft Green Book”

More a compendium of tools with some rationale for why they’re needed

Needs– Architecture– Use cases / scenarios to beat the

architecture against

© 2004 The MITRE Corporation. All rights reserved

Review current and emerging CCSDS standards A number of vendors are

selling SCPS-TP-based Performance Enhancing Proxies (PEPs)

SIS-SCPS-INTEREST mailing list started to get vendor inputs– All the major SCPS vendors

that I know of are on the list– Active discussion of SCPS-TP

Clarifications to improve interoperability

Possible extensions to address specific needs