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AT&T Wireless Services Aviation Communications Division Air to Ground Data Communications

AT&T Wireless Services Aviation Communications Division Air to Ground Data Communications e Plane Service WAEA Technical Committee February 16, 2000. Email Overview. Internet E-mail Transport - SMTP Access Proprietary POP3 IMAP4 E-mail In the Airborne Environment Transport and Access

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AT&T Wireless Services Aviation Communications Division Air to Ground Data Communications

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  1. AT&T Wireless Services Aviation Communications Division Air to Ground Data Communications ePlane Service WAEA Technical Committee February 16, 2000

  2. Email Overview • Internet E-mail • Transport - SMTP • Access • Proprietary • POP3 • IMAP4 • E-mail In the Airborne Environment • Transport and Access • Limitations • Bandwidth • Security • Operational Realities • ePlane Service in North America - AT&T’s Approach

  3. E-mail Basics - The Big Picture

  4. Internet E-mail • Transport • SMTP - Simple Mail Transfer Protocol • The Internet standard that governs how e-mail messages are sent from site to site. • Requests For Comment (RFCs) cover: • Message Size Declarations • Delivery Status Notifications • Authentication and Error Codes • Other Rules & Conventions Governing SMTP

  5. E-mail BasicsAccess - Models

  6. Internet E-mail • Access • Proprietary access will include POP3 & IMAP4 protocols but may use other messaging technologies besides IP (Eudora, MS Outlook). • POP3 - Post Office Protocol, provides an off-line access model. • IMAP4 - Internet Message Access Protocol, provides online & disconnect access model

  7. PROs and CONs

  8. E-mail BasicsAccess - Protocols

  9. Email In the Airborne Environment • Transport • Always Will Involve an RF Off-Aircraft Link • Will Require Gateways to Airborne Servers via Satcom, Terrestrial and Gatelink Methodologies • Will Use Ground-Based IP Network • Access • Passengers May Use Airborne Telephony, IFE or Other Cabin Distribution Systems. • Access Likely to Support “Core” Standard Interfaces (Physical Layer & Logical Layer)

  10. Limitations of Email In the Airborne Environment • Bandwidth • Legacy IFE Architectures May Have Limited Throughput • Off-Aircraft Link May Limit Large Attachments (May Not Be a Strong Limitation with Future Satcom Technologies) • Security • Corporate “Firewall” Is A Policy Problem - Security Protocols (IPSEC & SSL) Not Universally Adopted • Operational Realities • The “Flight Level 100” Problem

  11. Potential Aircraft Email & Internet Applications • Customer Service / IFE • Transaction Processing • Sports Scores • Connecting Gates • Service Selections • RES Access • Reservations • On-Board Info Service • Real-Time Info Service • Messaging Service • Marketing Tracking • Surveys / Comments • Shopping • Games / Gaming • Advertising • www.com • Cabin Mgmt • Connecting Gates • Cabin Logbook • Frequent Flyer / Customer Profile • On-Board Inventory • Systems Info & Troubleshooting • Departure Reports • Briefings • Customer Service • FA Comm System • Financial Rpts • Cabin Discrepancy Log (CDL) • Catering Reports • Baggage/Asset Tracking Operations • Electronic Logbook • Weather • FOQA • Weight Data • Departure Reports • A/C Position • OOOI Reports • 615 Data Loader • FMS • ACMS • Fault Reports • Gate Assignment • Engine Data • Crew Scheduling

  12. AT&T’s Approach ePLANE Service in North America

  13. Airborne Data Server Architecture On-Board Distribution System Maintenance Terminal Pilot Station Cabin Mgt Station Ethernet IFE Ctrl/ Server A429 ACARS Ethernet/Token Ring/RS485 Aircraft Systems Ethernet Gatelink FMC ACMS DFDAU/QAR IRS/INS/GPS CMC BRI/CEPT A429 CTU/496 Airborne Data Server (ADS) CDS

  14. NATS Network Architecture ADS Gatelink Possibilities Wireless LAN Tether - Ethernet, FDDI CDPD Airborne Data Server (ADS)

  15. I n t e r n e t ACM X . 2 5 / F r a m e R e l a y Airline Data Center Concept Airborne Communications Manager (ACM) Legacy Systems Client Server Environment Remote Dial Up Access LAN POTS 802.11 Internal TCP/IP Gatelink ACM Functionality: Communications Security Data Routing Network Management AT&T Data Hub

  16. Communications Management Functions Airborne & Ground-Based Capabilities Stack layers provide the following functionality: • Router API - provides application access to communications channels. Includes: • service request validation • File System interface • call statistics collection • call detail records (CDR) • Data Router - provides data routing (application-to-application, both on-board aircraft and off-aircraft). Includes: • request queuing (by priority and arrival time) • link selection (terrestrial/satellite/on-board) • addressing

  17. Communications Management Functions Airborne & Ground-Based Capabilities • Convergence - provides protocol conversion, when required. Also provides: • data encryption/decryption • data compression (and decompression) • PAD - provides basic packet service for off-aircraft communications. Includes: • data fragmentation and re-assembly • TCP packet assembling and dissembling • X.25 packet assembling and disassembling • packet routing • call control

  18. Remember….. • Email Is A Complex & Widely Used Technology • “End-to-End” Solutions Are Preferred - Solutions Must Be Found For the Airborne and Ground Segments • Standards-Based Solutions Are Recommended • Useful For Airlines Operations As Well As A Passenger Amenity • Users Must Understand The Limitations • Technology Alone Will Not Provide The Complete Solution

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