DIsrael SNIS SIW

NASA Space Network IP Services: 

NASA Space Network IP Services June 8, 2004 Dave Israel NASA/GSFC

Agenda: 

Agenda Introduction Operational Concepts & Scenarios Preliminary Architecture Summary

NASA Space Network IP Services: 

NASA Space Network IP Services Section 1 Introduction

What is SNIS?: 

What is SNIS? SNIS is an SN Product that will accomplish the following: Makes spacecraft systems look and operate just like any other nodes on the IONET Provide operational IP services that were previously supported in test and demonstration modes Enables end-to-end, standard IP communication between all mission resources (e.g. spacecraft, control center, Principal Investigators (PIs))

SN History as an Internet Service Provider: 

SN History as an Internet Service Provider SN has been supporting a daily IP connection to the South Pole since 1997 (South Pole TDRSS relay (SPTR)) Multiple ground demonstrations and activities have been done since (TILT, eclipses, OMNI, demonstrations) The LPT CANDOS experiment onboard STS-107 demonstrated SN/GN IP support to an orbiting user

WSC Low Rate Data Interfaces: 

Low Rate Switch / Local Interface DAS PTP 4800 Bit Blocks Ethernet Packets DAS NISN IONet MDM Serial clock & data NLIC UDP/IP WDISC PTP Serial clock & data TCP/IP TCP/IP SNIS Serial clock & IP data IP WSC Low Rate Data Interfaces

IP / WDISC / 4800BB Comparison: 

Ethernet IP UDP/TCP IP / WDISC / 4800BB Comparison S/C Data 1553 CCSDS Frm S/C Data Ethernet IP TCP WDISC CCSDS Frm S/C Data HDLC IP UDP/TCP S/C Data Ethernet IP UDP/TCP S/C Data ATM IP UDP/TCP S/C Data Ethernet IP UDP/TCP S/C Data CCSDS Frm S/C Data 1553 CCSDS Frm S/C Data CCSDS Frm S/C Data ATM IP TCP WDISC CCSDS Frm S/C Data Ethernet IP TCP WDISC CCSDS Frm S/C Data Spacecraft White Sands Control Center /Scientist WAN (IONET) RF Link Ethernet IP UDP 4800 BB CCSDS Frm S/C Data ATM IP UDP 4800 BB CCSDS Frm S/C Data Ethernet IP UDP 4800 BB CCSDS Frm S/C Data IP (SNIS) WDISC/DAS 4800BB CCSDS Frm S/C Data CCSDS Frm S/C Data SNIS Router Router Router Router Router Router LAN

SNIS-WDISC Comparison: 

SNIS-WDISC Comparison WDISC & DAS PTPs provide a gateway between the RF link and TCP/IP on the IONET Spacecraft indicates source of data (e.g. SCID, channel, APID) PTP is configured before each pass to determine where to send user data over ground network Spacecraft cannot dynamically address data to various ground systems or to other spacecraft SNIS supports end-to-end IP protocols with both source and destination address Spacecraft identifies source of data (e.g. IP address, port number) Spacecraft inserts destination address (addr/port) that can be used by the overall network to deliver data anywhere Ground systems use standard IP routing mechanisms to automatically forward packets to their destination (e.g. control centers, PIs, or other spacecraft) Spacecraft can dynamically address data anywhere Ground data routing is fully data driven

NASA Space Network IP Services: 

NASA Space Network IP Services Section 2 Operational Concepts & Scenarios

SNIS Product Overview: 

SNIS Product Overview The primary function of the SNIS Product is to make spacecraft systems look and operate just like any other nodes on the IONET The SNIS Product will enable the following concepts: Data driven data distribution File delivery (real-time and store and forward) Time services Spacecraft intercommunication Distributed processing across spacecraft Long-term system interoperability Enhanced security options

Security: 

Security Work with GSFC IT Security to select and implement range of security solutions for use by missions i.e. IPsec, VPNs, SSH, SCP SNIS allows mission to use available Internet security solutions Some security mechanisms transparent to WSC Some security mechanisms may require WSC router support Overall increase in privacy and end-to-end security for missions WSC

Mobile Network Connectivity(CANDOS demonstration): 

Mobile Network Connectivity (CANDOS demonstration) MILA Space Network (SN) TDRSS White Sands NM Ground Network (GN) Merritt Island Launch Area FL Wallops VA 36,000 Km 36,000 Km 250 Km Goddard Space Flight Center Greenbelt MD Low Power Transceiver (LPT) in shuttle bay WSGT STGT Tracking and Data Relay Satellite System (TDRSS) TDRSS Guam 36,000 Km 12,000 Km 36,000 Km 36,000 Km TDRS-Z TDRS-W TDRS-E GSFC WLPS 36,000 Km

Science Alert: 

Science Alert One spacecraft detects alert and wants to send notification to many other ground/space systems across an IP network Gamma Ray burst SNIS connects space elements and ground networks into one addressable network Spacecraft addresses alert packet to one or more addresses Packet relays through TDRSS to WSC Address causes router at WSC to send alert packets to one or more network nodes WSC

Direct File Delivery: 

Direct File Delivery File of data collected by instrument onboard spacecraft During TDRSS contact, files transferred: Spacecraft to ground MOC or end user Ground MOC or end user to spacecraft Spacecraft-to-spacecraft File transfers performed using appropriate protocols, (e.g. FTP, SCP, MDP, CFDP, NORM) Transfers direct from spacecraft to destination No storage at WSC WSC

Store & Forward File Delivery: 

Store & Forward File Delivery File of data collected by instrument onboard spacecraft During TDRSS contact, files moved to/from storage at WSC: WSC manual or automated forwarding (e.g. login or email) Spacecraft to/from WSC (return) Ground user to/from WSC (fwd) S/C to S/C (non-realtime) File transfers performed using appropriate protocols, (e.g. FTP, SCP, MDP, CFDP, NORM) Transfers from spacecraft to WSC and ground user to WSC, forwarded to destination later General purpose file storage at WSC for use by missions WSC

Clock Correlation: 

Clock Correlation Time server at WSC for use by spacecraft Standard, automated protocol for spacecraft clock sync Network Time Protocol (NTP) Precision Time Protocol (PTP - IEEE 1588) Protocols determine delays each way and deliver accurate time Exact accuracy needs study but 50 us to 1 ms expected Spacecraft then timestamp data and no ground time stamping needed Time Server WSC

NASA Space Network IP Services: 

NASA Space Network IP Services Section 3 Preliminary Architecture

SNIS Product Design Goals: 

SNIS Product Design Goals State-of-the art design that maximizes flexibility and reliability Modular and scalable to allow for future requirements expansion with minimal impact to facility and subsystems Maximize use of COTS products at WSC Minimize need for custom network equipment at user sites

High Level SNIS Functional Architecture: 

High Level SNIS Functional Architecture

SNIS Functional Architecture: 

SNIS Switching SNIS Codec TDRSS NCCDS RTN Services Restricted IONet SNIS File Services SNIS Time Services WSGT SNIS Scheduling, Control & Status SNIS LOR STGT GRGT Closed IONet Open IONet SNIS Closed IONet Routing TDRSS FWD Services TDRSS DAS RTN Services TDRSS NCCDS RTN Services TDRSS FWD Services TDRSS NCCDS RTN Services TDRSS FWD Services TDRSS DAS RTN Services TDRSS Scheduling, Control & Status SNIS Codec SNIS Restricted IONet Routing SNIS Codec SNIS Open IONet Routing SNIS Codec SNIS External Network Routing External Networks SNIS Functional Architecture

Preliminary SNIS Architecture: 

Preliminary SNIS Architecture FWD Data Legacy RTN Data DAS RTN Data IP Routing SNIS IP Routing RTN IP FWD IP FWD/ RTN IP SNIS Ethernet Switch(es) MDP Enc IR Enc Enc Enc Dec Dec Dec Dec MDPs IRs N Pooled encoders/decoders with lots of modulators and receivers Monitor and Logging interfaces Codec Router Serial Interfaces (HDLC framing) Codec LOR FS File Service Decoder Eth->Serial Descrambling Reed-Solmon Encoder Serial->Eth Convolutional Scrambling Reed-Solmon VLAN VLAN

SNIS Schedule: 

SNIS Schedule Implementation start: May 2004 System Requirements Review (SRR): July 2004 System Design Review (SDR): November 2004 Implementation Complete/Operations readiness Review (ORR): December 2005 Complete Transition to Operations/Sustaining Engineering: March 2006

NASA Space Network IP Services: 

NASA Space Network IP Services Summary

Summary and Action Items: 

Summary and Action Items SNIS planning is proceeding Requirements definition is in progress Architecture trade studies and demonstrations are underway For more information: Dave.Israel@nasa.gov NASA/GSFC Code 567.3 (301) 286-5294 http://snis.gsfc.nasa.gov/

Acronyms: 

Acronyms ADP Automated data Processing equipment APID Application Process Identifier BOF Birds of a Feather CANDOS Communication and Navigation Demonstration On Shuttle CCSDS Consultative Committee for Space Data Systems CEV Crew Exploration Vehicle CFDP CCSDS File Delivery Protocol COTS Commercial Off-the Shelf DAS Demand Access System DASCON Demand Access System Controller FTP File Transfer Protocol GN Ground Network GPM Global Precipitation Measurement mission GRID Ground Station Router Interface Device GSFC Goddard Space Flight Center HDLC High-level Data Link Control IONET Internet Protocol Operational Network IP Internet Protocol IPSec Internet Protocol Security ISP Internet Service Provider ISS International Space Station KSA K-band Single Access LAN Local Area Network LDBP Long Duration Balloon Project LEO Low Earth Orbit LPT Low Power Transceiver LRS Low Rate Switch MA Multiple Access MDM Multiplexer/Demultiplexer MDP Multicast Dissemination Protocol MILA Merritt Island Launch Area NCCDS Network Control Center Data System NENS Near Earth Network Services NISN NASA Integrated Services Network NLIC NISN Local Area InterfaceCard NORM NACK-Oriented Reliable Multicast NTP Network Time Protocol OCD Operations Concept Document OMNI Operating Missions as Nodes on the Internet ORR Operations Readiness Review PCD Project Commitment Document PDL Product Design Lead PI Principal Investigator PMP Product Management Plan PTP Programmable Telemetry Processor PTP Precision Time Protocol S/C Spacecraft SCID Spacecraft ID SCP Secure Copy Protocol SCPS Space Communications Protocol Standards SDR System Design review SLE Space Link Extensiom SN Space Network SNAS Space Network Access System SNIS Space Network IP Services SPTR South Pole TDRSS Relay SRD System Requirements Document SRR System Requirements Review SSA S-band Single Access SSH Secure Shell STGT Second TDRSS Ground Terminal TCA Transformational Communication Architecture TCP/IP Transmission Control Protocol/Internet Protocol TDM Time Division Multiplexing TDRS Tracking and Data Relay Satellite TDRSS Tracking and Data Relay Satellite System TILT TDRSS Internet Link Terminal UAV Unmanned Aerial Vehicle UDP User Datagram Protocol ULDBP Ultra-Long Duration Balloon Project VPN Virtual Private Network WAN Wide Area Network WDISC WSC Data Interface Capability WSC White Sands Complex WSGT White Sands Ground Terminal