The Space Communications Protocol Specifications (SCPS) are a set of extensions to existing protocols and new protocols developed by the
Consultative Committee for Space Data Systems
The Consultative Committee for Space Data Systems (CCSDS) was founded in 1982 for governmental and quasi-governmental space agencies to discuss and develop standards for space data and information systems. Currently composed of "eleven member agenc ...
(CCSDS) to improve performance of Internet protocols in space environments. The SCPS protocol stack consists of:
SCPS-FP€”A set of extensions to FTP to make it more bit efficient and to add advanced features such as record update within a file and integrity checking on file transfers.
SCPS-TP€”A set of
TCP options and sender-side modifications to improve
TCP performance in stressed environments including long delays, high bit error rates, and significant asymmetries. The SCPS-TP options are TCP options registered with the
Internet Assigned Numbers Authority
The Internet Assigned Numbers Authority (IANA) is a standards organization that oversees global IP address allocation, autonomous system number allocation, root zone management in the Domain Name System (DNS), media types, and other Inte ...
(IANA) and hence SCPS-TP is compatible with other well-behaved
TCP implementations.
SCPS-SP€”A security protocol comparable to
IPsec
In computing, Internet Protocol Security (IPsec) is a secure network protocol suite that authenticates and encrypts packets of data to provide secure encrypted communication between two computers over an Internet Protocol network. It is used in ...
SCPS-NP€”A bit-efficient network protocol analogous to but not interoperable with
IP
The SCPS protocol that has seen the most use commercially is SCPS-TP, usually deployed as a
Performance Enhancing Proxy
Performance-enhancing proxies (PEPs) are network agents designed to improve the end-to-end performance of some communication protocols. PEP standards are defined in RFC 3135 (PEPs intended to mitigate link-related degradations) and RFC 3449 (TCP pe ...
(PEP) to improve TCP performance over satellite links.
External links
www.scps.orgis a web page devoted to the SCPS protocols and contains links to the protocol specifications, briefing material, and test results. ({{webarchive , url=https://web.archive.org/web/*/http://www.scps.org/ , date=* , title=SCPS )
* Th
Open Channel Foundationdistributes a free reference implementation of the SCPS protocols that includes a transport-layer PEP application.
CCSDS.orgis the main web page for the CCSDS.
Space standards
Networking standards
Consultative Committee for Space Data Systems
Internet protocols