Com Domain Meetin _4 by wulinqing

VIEWS: 23 PAGES: 15

									                Ground/Ground IP Communications:
              European experience and perspectives




                                                         Eivan Cerasi
                                                          DAS/CSM

                                              ACP/WGN/SG1 7th Meeting
                                                27 March 2006, Malmo

European Organisation for1the Safety of Air Navigation
 ACP/WGN/SG1#7
                                                   Content

       PEN ( Pan-European Network)
               iPAX-TF
               PEN: planning and implementation




       FMTP (Flight Message Transfer Protocol)




ACP/WGN/SG1#7     2
                    Why we need an IP PEN?

                             International Data
      Dependence on X.25       • OLDI over X.25
                               • ASTERIX over X.25
                               • AFTN/CIDIN over X.25
                               • CFMU/CRCO/EAD over
                                 separate IP networks

                             National Services
                              • Internal IP/X25 applications
                              • X25 Links to SITA/ARINC
                              • Management, etc..




ACP/WGN/SG1#7   3
          IPAX Task Force & Trials (2001-2004)

      WAN trials to support R&D activities to plan migration from
       X.25 to IP:
         12 European ANSPs, 22 logical interconnections
         various lower media (VPN, Internet, LL, ISDN, MW)
         14 European sites + NASA connected via IPv6
         Directory services (DNS)
         IP security (IPsec and firewalls)
         X.25 over TCP/IP
         OLDI over TCP/IP data exchange
         ASTERIX over IP data exchange
         AMHS over TCP/IP


ACP/WGN/SG1#7   4
        Outcome of iPAX-TF and Recomendations

        There are no show-stoppers to use of IP for ATC applications

        Porting existing applications to IP may require application
         adaptations (ex: TCP client/server, TCP byte stream, IP addressing)

        All UDP-based systems must be designed to mitigate
               out of sequence and lost UDP/IP datagram's
               repetition of identical UDP/IP packet (can happen in failure situation of IP multicast)

        Destination UDP or TCP Port Numbering must be standardized
               AMHS (RFC2126: 102), FMTP (8500), ASTERIX over IP (8600)

        There are IPv4 address conflict problems at international level
               End-systems with international access should be dual-stacked (IPv4/v6) by 2009 (IPv6
                is the standard network protocol to which all applications should converge to)
               International Multicast, VoIP and MobileIP best supported over IPv6

ACP/WGN/SG1#7      5
                                                                                            Pan-European Network


                                                                                                   PEN
                                                                                   Provider's end-to-end responsability



                                                                                                                                                       CPE at a first
                                                                                                                                                       location serving a
                                                                                                   Switch at POP                                       network

                                                                                   Switch at POP
                                                                              th
                                                                           Pa                                                 Switch at POP
                                                                        al
                                                                     sic
                                                                hy
                                                         ar   yP
        Network                                  Pr
                                                    im                                               Core Network

                                   Sec                                                                                                                                          Network
                                       o   nda
                                                 ry P
                                                     h ys
                                                              ical
                                                                     Path
    Site or network with
                                                                            Switch at POP
     attachment at one
          location
                               CPE at a
                               location serving
                                                                                                                    Switch at POP
                               a user or
                               network                                                                                                        CPE at a second                  Network with
                                                                                                                                              location serving a            attachments at two
                                                                                                                                              network                       separate locations




ACP/WGN/SG1#7              6
                                                    What is PEN?

       Pan European IP network service of the ATM sector which will
        ultimately carry all data and voice applications

       A multi-protocol service (supporting both IPv4 and IPv6)

       Initially likely to be limited to multi-protocol (IPv4/IPv6) data services
        acting as a core backbone interconnecting existing IP national
        networks

       A scalable backbone capable of supporting multicast and voice at a
        later stage


ACP/WGN/SG1#7   7
                            PENS Outlook and Timescales

    2005-2009
               X25 -> IP migration has started leading to a mixed X.25/IP
                environment
                     Additional ECIP and Implementing Rules to be further developed
                     ANSP X.25 application/systems are being migrated to IP
               June 2006: PEN Call for Interest
               January 2007: PEN Call for Tender
               January 2008: Deployment of PEN and operational
                evaluation/validation
               Summer 2008: initial IOC
    2010+ : Application and Service extension
               Voice, A/G applications, International Multicast, ….
ACP/WGN/SG1#7     8
                         Application Migration Status to IP

     OLDI communications have been adapted to TCP/IP                                ECIP
                                                                                     COM
      and pre-operational trials were successful                                      04


                   Flight Message Transfer Protocol (based on IPv6)                    12/2007



     AFTN/CIDIN is being migrated to AMHS over TCP/IP                               ECIP
                                                                                     COM
                                                                                      05
                   First operational link between Madrid and Frankfurt, IPv4 end-
                    systems but IPv6 WAN interconnectivity)                                 12/2007


     Surveillance distribution is converging to ASTERIX over
      IP
                   This impacts surveillance systems (RMCDE, ARTAS, ModeS, ….)

     CFMU/EAD/CRCO are based on IP
     Voice services over IP are being evaluated by EUROCAE
ACP/WGN/SG1#7       9
                                            IP and PEN

       No immediate changes within ANSP IPv4 private networks
        who can migrate to IPv6 at their own pace
       Build an IPv6 addressing scheme independent of ISPs,
        VPNs and topology
       IPv4/ IPv6 dual-stack approach where possible
       Standard multi-protocol IP routers to resolve overlapping
        IPv4 address space, co-existence of IPv4/IPv6 and
        support full migration to IPv6 (beyond 2010)
       Make use of IPv4/v6 address translation techniques if
        necessary but highly recommend IPv6 end-to-end



ACP/WGN/SG1#7   10
                                           IPv6 Unicast Address Scheme

        Following the iPAX-TF work, EUROCONTROL has become an LIR
         for allocation and assignment of IPv6 addresses on behalf of its
         stakeholders
                             RIPE Responsibilty
                                 (32 bits)

                   3            13          13     3 3        13            16                           64

                 FP       TLA ID         Sub-TLA   Res.   NLA ID       SLA ID                       Interface ID




                    Net.         v4/                  Site
           F1                             F2                         LAN                               ESI
                   Prefix        v6                 Location
          3 bits       7 bits    1 bit    5 bits   variable bits   variable bits                       64 bits


                Common Responsibilty                                               ANSP Authority
                 (Coordination Body)                                                 (80 bits)
                      (16 bits)

ACP/WGN/SG1#7           11
                                   IPv6 Address Example

        EUROCONTROL has been allocated address 2001:4B50::/32

        From this range, ROMATSA has been sub-allocated with
         2001:4B50:0940::/42 which they can advertise at their border.

        ROMATSA has then been assigned with /48 network prefixes to
         number their systems. These addresses are registered in the RIPE
         database and are indicated as being maintained by the
         EUROCONTROL Agency.

        Sub-allocations have been planned for ANSPs, Airports, Pan-
         European users, Regional Networks, EUROCONTROL facilities.
ACP/WGN/SG1#7   12
                                              IPv6 Sub-Allocation Scheme
                                                       Organisation                  Network   Prefix
                Country                                                                                   /42
                                                       Inter-organisational links      2001:   4B50:    0040:
                Albania (AL)                           ANTA                            2001:   4B50:    0080:
                Armenia (AM)                           ARMATS                          2001:   4B50:    00C0:
                Austria(AT)                            Austro Control                  2001:   4B50:    0100:
                Azerbaijan (AZ)                        AZANS                           2001:   4B50:    0140:
                Belarus (BY)$                          BELAERONAVIGATSIA               2001:   4B50:    0180:
                Belgium (BE)                           Belgocontrol                    2001:   4B50:    01C0:
                Bosnia and Herzegowina (BA)            BHDCA                           2001:   4B50:    0200:
                Bulgaria (BG)                          ATSA Bulgaria                   2001:   4B50:    0240:


                                                   .
                                                   .
                                                   .

                Regional

                Germany and Benelux                    CEATS                          2001:    4B50:    1080:
                Central Europe                         RAPNET                         2001:    4B50:    10C0:

                European

                                                       Backbone (future provision)    2001:    4B50:    2080:
                Eurocontrol                            Bretigny                       2001:    4B50:    20C0:
                Eurocontrol                            CFMU                           2001:    4B50:    2100:
                Eurocontrol                            CRCO                           2001:    4B50:    2140:
                Eurocontrol                            CSPDU                          2001:    4B50:    2180:
                Eurocontrol                            EURO HQ                        2001:    4B50:    21C0:
                Eurocontrol                            Luxembourg                     2001:    4B50:    2200:
                Eurocontrol                            Maastricht UAC                 2001:    4B50:    2240:


ACP/WGN/SG1#7      13
                                                                                    FMTP

        ECIP Objective COM-04 (goodwill and only for international links)

        SES Implementing Rule (legislation both international/national)
               FMTP rule is approved but pending final formatting prior its publication
               The Rule will mandate a EUROCONTROL Specification called FMTP
               Should be published summer 2006

        FMTP ETIC Test Tool – version 3.0 supports both X.25 and TCP/IP
               Simulate systems’ communication partners
               Give an open access and a total control on all aspects of the protocol
               Send user- and protocol-defined messages
               Receive and process user- and protocol-defined messages
               Write and play an operational scenario
               Live monitoring and logging of all events
               ….



ACP/WGN/SG1#7     14
                                                     More information

     Contact:

     Eivan CERASI
          Email:                   eivan.cerasi@eurocontrol.int
          Telephone:               +32 2 729 3791


     EUROCONTROL Network SubDomain:
       http://www.eurocontrol.int/communications/public/standard_page/com_network.html




ACP/WGN/SG1#7   15

								
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