An Architecture for. Interface Modernization GSAW Dr. Lance Williams SMC/LAAFB UNCLASSIFIED

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1 An Architecture for AFSCN Ground Interface Modernization Dr. Bharathi Devi SMC/LAAFB Dr. Lance Williams The Aerospace 2012 by SMC/LAAFB. Published by The Aerospace Corporation with permission.

2 Overview Background Limitations of the current architecture Proposed changes Implications Prior related work Conclusions References 2

3 Background AFSCN ground network is almost 50 years old Has many obsolete and proprietary protocols and equipments hindering its efficiency Satellite Control and Network Systems Division (SMC/SN) has identified many areas for modernization Ground interface modernization Compatible Sat C2 GIG WAN ATM to IP transition is scheduled for

4 AFSCN after IP transition DISA AFSPC AFSCN Comm Segment DCC Cisco MSPP DISA GIG IP KG Cisco 3845 Cisco 7606 proprietary interface WANIU SOC C2 system 508 serial interface OCN Cisco MSPP IP KG Cisco 3845 WANIU DCC RTS RGF IP serial 4

5 Limitations Addressed SOC to RTS interface is serial, based on link layer protocols EXU or IBM s ADCCP Sustainment is costly Seamless interface with other networks impossible Interface not extensible Proprietary edge devices to translate serial interface, called WANIU No centralized Network Management System (NMS) and the server associated with that 5

6 Elements of the Architecture Implementation of an open standard ground interface in AFSCN range segment TCP/IP based on CCSDS/SLE (ANSI/AIAA S-123, ) for SV telemetry and commands HTTP/XML for RTS monitor and control Implementation of the same interface in serial-to- WAN converter for legacy serial users Implement network operations server for RTS administrative software for RTS status and NMS for network management 6

7 Open Standards Interface ANSI/SLE Unframed telemetry Analog timing Ternary command streams Binary command streams Command echo streams XML/HTTP RTS control and monitor 7

8 Architectural implications of the open standard interface Flexibility in interface implementation In existing systems In new systems Allows vendor choice for user C2 systems Eliminates reliance on proprietary multiplexers Reduces sustainment costs 8

9 Changes to proprietary interfaces Requires serial to IP conversion in legacy WANIU boxes at range and SOC Current Changes RTS: Serial converters removed from range segment Software changes to the RTS to implement SLE Software changes to implement XML interface for monitoring SOC: Alternative non-serial interface offered to SOCs 9

10 Range Architecture Changes RBC / ARTS TT&C CI Single T&C data session from the active user SV T&C The active user connects directly to the RTS for SV T&C and RTS M&C. Inactive users have no access to RTS M&C data. Network admin uses telephone RTS M&C SV T&C Active User C&S CI Inactive User Current RTS M&C Single M&C data session from the active user Network admin Inactive User Serial RBC DSP Single T&C data session from the active user SV T&C The active user connects directly to the RTS for SV T&C and RTS M&C. Inactive users access RTS M&C data through the NetOps server RTS M&C SV T&C Active User Epoch server M&C agent NetOps Server Inactive User Future Epoch interface RTS M&C RTS M&C Network admin Inactive User Two M&C data sessions from the active user and NetOps server IP 10

11 Network Management Element Centralized network management at the NOCs Distributes RTS status to non-active AFSCN users Provides centralized administrative control of RTSs Provides network management for AFSCN 11

12 Interface Modernization RBC ARTS WANIU AFSCN NOW SOC C2 WANIU system 508 interface proprietary interface proprietary interface 508 interface RBC open standard interface open standard interface Serial-WAN adapter Legacy serial SOC C2 system ARTS (upgraded with RBC core) ) Modern IP SOC C2 system AFSCN FUTURE NetOps Server Multi-le evel access Netw work status pathbre eaker service open RTS M&C s ervice Serial IP 12

13 Prior Proof-of-Concept Demonstration (status presented to GSAW 2007 Session 9) Civil Reserve Space Service project executed Developed ANSI standards for translation from legacy serial TT&C interfaces (ICD 508) to CCSDS SLE ANSI/AIAA S and ANSI/AIAA S Demonstration in 2007 to connect NOAA Wallops and Fairbanks tracking stations, ti and John Hopkins APL station, ti to AFSCN Collaboration led by SMC/SN Implemented ANSI standards in COTS front-end processors from 2 vendors Successfully performed hundreds of satellite contacts on test satellites Demonstrated interconnectivity to NOAA CDA stations Interface coordination of US Govt. networks facilitated by agreement on open standards Support of AFSCN-unique performance requirements 13

14 Capability enhancements Will add broader range of RTS monitor and control points than the dozen or so supported on the current serial interface Packaging of unframed encrypted telemetry in timetagged ANSI/SLE frames guarantees perfect time/data correlation Will provide unified capabilities as dictated in DoD I Enables federation with other ground systems 14

15 Changes to business logic SOC users retain real time control and status of RTS, but with more control and status points NOC gets electronic real time control and status (currently only by telephone) RTS status provided to non-active AFSCN users (not currently flying a satellite) 15

16 Conclusions Identified the current limitations of the AFSCN architecture Proposed an open architecture based interfaces for the AFSCN ground systems that will overcome the limitations of the current network Discussed implications of the architecture 16

17 References 1. Pietras, J., Air Force Satellite Control Network Interoperability, Space Internet Workshop #4, June CCSDS SLE Development related: ANSI/AIAA S and ANSI/AIAA S Ledlow, L., Spindler, J., & Williams, L., harmonization of USG Satellite Ground Systems, GSAW Pietras, J., Application of ANSI Standards for Ground Transfer of Space Vehicle Command and Telemetry, GSAW