Project Title

Delay-Tolerant Reliable Multicast



Document Number


6.09 Delay Tolerant Networking Working Group

Document Type


Description of Document

As space flight missions become more frequent and more complex, it will become apparent that multicast communications (delivering a given item of information to multiple entities that have expressed interest in it) may be as useful in space networks as it has proven in the Internet. A new standard for reliable multi-point data delivery in delay-tolerant networking is needed.

Applicable Patents

There are no patent issues for this technology that are known by the CCSDS community

Patent Comments

Survey of Similar Standards
Documents or Projects
Undertaken in Other Bodies
and elsewhere in CCSDS

The CCSDS Asynchronous Message Service provides a publish/subscribe service among others, but AMS is not designed for efficient large-scale, high-volume data publication. Internet multicast is not a viable option because reliable IP multicast methods rely on in-order end-to-end retransmission, which is unsuitable for space flight communications.


Book Editor


Book Editor Resources

6 work months

Prototype 1


Prototype 1 Resources

6 work months

Prototype 2

Prototype 2 Resources

Prototype 3

Prototype 3 Resources



Monitor Only

Resource Comments

Resources, contributors, and monitors for this project have not yet been identified. The project is being posted in order for the DTN WG to begin tracking it in planning and scheduling.


Legend for Schedule Milestones
Orange Bullet = Required for Orange Books
Green Bullet = Required for Green Books
Magenta Bullet = Required for Magenta Books
Blue Bullet = Required for Blue Books
Note - Red Books are Draft Blue/Magenta Books

Schedule Milestones
Orange BookGreen BookMagenta BookBlue Book
Original Completion Date
(Date in M/D/YYYY format.)
(Date in M/D/YYYY format.)
Project ApprovedOrange BulletGreen BulletMagenta BulletBlue Bullet11/1/2020
Project Start DateOrange BulletGreen BulletMagenta BulletBlue Bullet1/11/2021
Internal WG Review
First Draft Circulated to WGOrange BulletGreen BulletMagenta BulletBlue Bullet5/15/2021
First Draft Comments DueOrange BulletGreen BulletMagenta BulletBlue Bullet6/15/2021
Second draft circulated to WGOrange BulletGreen BulletMagenta BulletBlue Bullet8/1/2021
Second Draft Comments DueOrange BulletGreen BulletMagenta BulletBlue Bullet9/1/2021
Final WB Submitted to AD for Further ProcessingOrange BulletGreen BulletMagenta BulletBlue Bullet10/1/2021
External Milestones
Secretariat Document ProcessingOrange BulletGreen BulletMagenta BulletBlue Bullet2/1/2022
First Agency ReviewMagenta BulletBlue Bullet4/1/2022
RID ResolutionMagenta BulletBlue Bullet5/1/2022
Secretariat Document Processing 2Magenta BulletBlue Bullet6/1/2022
Final Agency ReviewMagenta BulletBlue Bullet8/1/2022
RID ResolutionMagenta BulletBlue Bullet9/1/2022
First Prototype DevelopmentBlue Bullet6/1/2022
Second Prototype DevelopmentBlue Bullet6/1/2022
CMC ApprovalOrange BulletGreen BulletMagenta BulletBlue Bullet11/1/2022
Total Time to Complete
(in months)
Version: 1.0
Created at 5/30/2019 8:18 PM by Scott Burleigh
Last modified at 5/30/2019 8:18 PM by Scott Burleigh