Presentation on theme: "TCP / IP and ATN in Europe Danny Van Roosbroek, EATM/DAS/CSM"— Presentation transcript:
1TCP / IP and ATN in Europe Danny Van Roosbroek, EATM/DAS/CSM ICAO Seminar - TCP/ IP and ATN in EuropeTCP / IP and ATNinEuropeDanny Van Roosbroek, EATM/DAS/CSMBangkok, November, 2003
2Overview TCP / IP ATN TCP/IP and ATN Coexistence ECAC TCP / IP StrategyiPAX Task ForceFlight Data ExchangeRadar Data DistributionMessage HandlingGround/Ground voiceATNECAC ATN StrategyLink2000TCP/IP and ATN CoexistenceEurocontrol Communications Strategy
3ECAC TCP/IP Strategy (1) Applicable to ATM Ground/Ground communicationThe Problem :All international ATC data exchange applications such as OLDI, make use of X.25 technologyKey manufacturers have stopped selling X.25 equipment and will cease support after 2005The Solution is IP :IP is omnipresent and matureIPv4 is implemented in States; different approachesIP version 6 is supported by the European Commission (PR 29/01/02)Since the advent of internet-related products and services, industry-wide support of X.25 products and services is rapidly diminishing. As a result, the European ATM community as a whole has to face a technology change from existing ground X.25 communication to internet-based communication protocols. This is mainly applicable to surveillance data exchange and flight data exchange. Voice applications and other services (e.g Air Traffic Flow Management) shall be also affected by this technology change but at a much later stage.The essential component of the ground communications strategy is therefore, the planning and co-ordination of migration of international X.25 to IP which involves the deployment of:an ECAC wide IP (version independent) network servicethe migration of existing X.25 based applications and systems to IP (OLDI, Surveillance data distribution, meteorological data).
4ECAC TCP/IP Strategy (2) IP version 6 for international data exchangeAddress translation for existing IPv4 islandsStates are encouraged to migrate from IPv4 to IPv6Institutional Issues for IP service provisionECIP COM 09 : migration from X25 to IP is under developmentStrategy : “To implement the transition from legacy CONS to high QoS COTS-based IP technology to support current and future application requirements for ground environment.”The European network architecture will be developed to provide a topology-independent IP network service that encompasses existing IPv4 national network deployments. The network architecture envisaged involves the use of IPv6 in order to build an international IP network service. Robust institutional arrangements must be put in place between implementers and existing network operators in order to achieve the envisaged service.IPv6 is the recommended technology to support the meshed international network federating the national IPv4 implementations. At the same time, states are encouraged to migrate to IPv6 for their national network. The key benefits of IPv6 are a scalable addressing and routing architecture and the provision of better support for voice and mobile applications.The European direction to implement international IPv6 services will be co-ordinated with the international community as early as possible
5iPAX Task Force IPAX Task Force established to: WAN Trials modify aeronautical standards for the exchange of ATM/CNS datamigration from X.25 to TCP/IP protocol suitefocus on ground data communicationsWAN Trials14 European sites connected via IPv6IP security (IPsec and firewalls)OLDI, ASTERIX, AMHS over TCP/IP data exchangeThe internet Protocol for Aeronautical eXchange Task Force (iPAX-TF) has been established in August 2001 by EUROCONTROL to address the need to evolve current ATSP X.25-based data network infrastructure and services to the internet-based protocol suite (TCP/IP). Currently, this task force involves some 25 experts from 15 EUROCONTROL Member States.The objective of the iPAX-TF is to develop or modify guidelines, specifications and possibly standards related to the exchange of aeronautical data between ATS or CNS systems based on the TCP/IP protocol suite with the aim to propose an alternative for the eventual replacement of the X.25 protocol in ATS/CNS.A full iPAX-TF website has been prepared to increase awareness of the task force activities. The public site is Specifications will be made publicly available once the iPAX-TF considers them mature.
6Flight Data Exchange - OLDI (1) Inter-centre coordination is the process by which the control of a flight is passed over from control centre to the next as the flight progresses. As part of this process, flight plan updates need to be communicated to the downstream center. It is a crucial application that has been executed using voice-based procedures. Since the early 90s, the On Line Data Interchange (OLDI) protocol, is used as the standard way to exchange coordination messages between control centres in Europe. It is now been expanded to the whole ECAC area.The status of the FDE (Flight Data Exchange) connections in Europe reflects the situation as of January 2002.Even though the majority of the inter-centre connections respect the provision of the FDE ICD Part 1 (green and brown links), some implementations evidence deviations that are caused by legacy solutions (blue links). The status shows clearly that the core area of ECAC has adopted the FDE ICD Part 1 protocol to support OLDI exchanges. Its enforcement is currently further expanded towards North Africa, Greece and the Balkans, and Eastern Europe (purple links).
7Flight Data Exchange (2) FDE/ICD Part 1 implemented in 80 Civil/Mil centres based on X25FDE/ICD Part 2 supports TCP / IPNo change to the OLDI applicationValidation by iPAXProcedure for publication as standard startedECIP COM-04 Time scale : 1/ /2007OLDI is a subset of AIDCOLDI ApplicationOLDI ApplicationTCP/IPFDE ICD(communicationmanager)FDE ICD(communicationmanager)FDE interface to X.25FDE interface to TCPCommon rules and message formats are incorporated in the EUROCONTROL Standard for On-Line Data Interchange. This standard ( the Eurocontrol FDE ICD Part 1) defines a set of functionalities which can be implemented on top of X.25 networks and point-to-point links. The FDE ICD Part 1 standard identifies a protocol stack and determines the options that are part of these protocols, this is called a profile.FDE-ICD Part 2 defines the exchange of data over TCP/IP and introduces a Management Information Base (MIB) for systems management.In the ATN context, coordination is ensured by an application called ATS Interfacility Data Communications (AIDC, which is part of Inter Centre Communications - ICC). The ICAO ATN Panel produced a comprehensive manual explaining the operational context and the concept behind each ATN application ([CAMAL3]).While more global and functionally richer than OLDI, the AIDC deployment is however conditional to the existence of ground/ground ATN communication services. As the OLDI standard in Europe continues to meet the operational requirements for flight data exchange and as IP is the strategy for the ground network environment , there is no need to migrate to AIDC within the ECAC area.X.25
8Radar Data Distribution (1) RADNET - Germany / Benelux (4 States/EUROCONTROL)RENAR - FranceUK-RADNET - United KingdomCADIN - Czech RepublicREDAN - SpainSACON - Slovak RepublicACN - AustriaCANDIetc.ExistingRadarNetworksbasedonX25The surveillance distribution domain encompasses a variety of systems that have been deployed on a national or regional basis to relay sensor data e.g. RMCDE, SCR/UAST SIR (Server Info Radar). Each have been designed on the basis of different objectives and may not be fully equivalent in terms of functionality. Surveillance distribution systems are networked for better service reliability and some are networked to possibly to exchange sensor data and service data.As a result, the change in technology from X.25 to IP shall impact this data flow between surveillance distribution systems. This flow is not only a national issue as surveillance distribution systems are already networked on a regional basis.
9Radar Data Distribution (2) DebdenX.25CAPSINClaxbyGatwickUK-RADNETRADNETAmsterdamRAPNETBoulogneChaumontRENARParisX.75RMCDE/SDPN100SIR
10Radar Data Distribution (3) Today’s radar network based on X.25 (e.g. RADNET)Migration to TCP/IPInternational Impact : 30 sensors & 60 radar systemsfor RMCDE : IPv4 multicast profile for surveillance data distribution definedThe IPv4 multicast profile for surveillance data distribution has been released as an EUROCONTROL Guideline for Implementation Support (EGIS).
11Message Handling (1) AFTN/CIDIN will be replaced by AMHS AMHS in ECAC will use TCP / IPAn AMHS/IP specification is under development and submitted to ICAO/ACP/WGNCommunication between AMHS/IP and AMHS/ATN or AFTN systems will be ensured via double stacksThe ECG (Eatm Communications gateway) implements the AFTN/AMHS gateway as specified in Doc 9705; and provides dual stack underlying network (ATN and TCP/IP)ECIP COM-05:Migration of AMHS to an IP COTS-based messaging (long term)The AFTN has been the cornerstone for aeronautical message interchange for the last 30 years. Both the technology and the specifications are out-dated, and ICAO has specified the Aeronautical Message Handling Service (AMHS) for future message handling applications. Some ATSPs ( Air Traffic Service Providers) are already deploying or plan to deploy AMHS technology for international messaging applications to replace the current AFTN. In the ECAC area, the rollout of AMHS-based systems is governed by the ECIP (European Convergence and Implementation Programme) COM05.AMHS will be deployed over TCP/IP in the EUR region. A “Fast Track” AMHS/IP spec for Europe will be developed, and the content contributed to ICAO ACP.The migration from AFTN/CIDIN to AMHS has been defined in ECIP COM05Such implementations must coexist with, and where necessary interoperate with AMHS/ATN-based applications, via appropriate gateways for international messaging.Initial deployment of AMHS technology has already begun, but coexistence with legacy (AFTN and CIDIN) technology will be necessary for the medium-to-long term.The EATMP Communications Gateway offers portable software components necessary to implement a gateway between the AFTN message switching world and AMHS.
12Message Handling (2) National IP Messaging 2000 2005 2010 2015 2020 BilateralECAC AMHS/IPAMHS / IP Messaging GatewayAMHS/CIDIN/AFTN Gateway (ECG)(External)AFTN / CIDIN(External)National IP MessagingBilateral / InternationalInternet-based COTS messaging products are already in use on a national basis, and are expected to be used internationally subject to bilateral agreements. In the long term, an IP-based messaging system, not necessarily SMTP, is expected to gradually replace AMHS, such messaging system will still need to interoperate with AMHS via an appropriate gateway to ensure when so needed, a seamless store and forward messaging environment across the ECAC area. A study in this area needs to be undertaken.20002005201020152020
13Ground / Ground VoiceInternational Voice over IPNational Voice Over IPATS-QSIG based Voice NetworkAnalogue Voice Network(External)1.1 MFC/R2Analogue voice networks based on MFC/R2 are widely deployed in the ATSP community. These will continue to be operated in the medium term, with a gradual phasing out in accordance with technology evolution in the public telecomms service in the short and medium term.1.2 ATS-QSIG Voice ServicesThe short term strategy is that most states should complete the move from legacy analogue systems to a QSIG based digital voice infrastructure which provides the technical base for the improved end-to-end voice services, in accordance with ECIP objectives.1.3 Voice over IPIn view of the anticipated widespread commercial adoption of Internet technology, it is envisaged that these protocol sets will be the basis for voice over Asynchronous Transfer Mode, and future switching fabric and bearers, for the ATSP community. Adoption of IP as the common enabler for future fixed and mobile network services will allow for the introduction of voice over IP, based on ITU H.323 and/or IETF SIP, as a more cost advantageous goal for seamless voice services over multiple concatenated sub-network technologies. These protocol sets are also enablers for multi-media communications services such as videoconferencing.20002005201020152020
14ECAC ATN Strategy (1)The ATN internet is the strategic solution to support Air - Ground applications ( For G/G applications IP is the strategic solution).ECIP ATC06 : Implement ATC A/G Data Link Services - 6/ /2007 ( Link2000 Programme)The IP SNDCF allows COTS IP Networks to carry ATN A/G Traffic ( e.g. CPDLC messages)Airborne IP (in the cabin) can coexist with ATN (in the cockpit)1.1 ATN generalThe ATN has been specified in international standards (ICAO SARPs). Those standards are mature having been validated through extensive prototyping and pre-operational trials programmes and the ATN is now being implemented for air/ground services providing safe and cost-effective data communications to meet the operational needs of the aeronautical community. The initial phase of the deployment consists of implementing ATN Internet service in support of the Link2000+ programme. The ATN Internet service will be the communications platform for the air-ground data communications services deployed for LINK2000+ from 2005 onwards.1.2 ATN internet ServiceThe ATN internet service has been specified to deliver network services which have been identified as necessary to meet the data communications service requirements for air navigation applications that conform to the ICAO ATN SARPs. These requirements include specific characteristics such as policy based routing and mobile end systems. ATN Air-Ground end-to-end services will be carried over the underlying IP-based ground networks, using an appropriate SNDCF or tunnelling technology. In ATN technical terms, this means that the IP network is used as a ground-ground ATN subnetwork via an appropriate SNDCF
15ECAC ATN Strategy (2) The LINK 2000+ Programme Co-ordinating the implementation of en-route CPDLC (ACM, ACL, AMC, DLIC) over ATN/VDL2 by 2007.Providing a migration path for legacy DCL and D-ATIS data link services to ATN/VDL2.Programme ObjectivesThe LINK Programme
16The current scope of the LINK Programme will provide 7 air-ground data link services for ATC, in the period 2003 to 2007, in the airspace of 11 European States. This will result in reduction of communication errors and pilot and controller fatigue (Safety); increased capacity through both reduction of voice congestion and increase in controller efficiency (Capacity) and reduction of flight costs generated by ATM delays, and of Airlines communication costs (Cost Effectiveness).The implementation of the LINK Programme will require the completion of a wide range of activities by a number of stakeholders. These activities have been planned to enable implementation to be achieved in a safe and efficient manner.The following data link services are included in the LINK Programme:DLIC Data link Initiation CapabilityACM ATC Communications ManagementACL ATC ClearancesAMC ATC Microphone CheckDCL Departure ClearanceDSC Downstream ClearanceD-ATIS Data link ATIS
18ATN and IP Co-Existence (1) L2KATNVDL2ATC centreThe ATN internet service has been specified to deliver network services which have been identified as necessary to meet the data communications service requirements for air navigation applications that conform to the ICAO ATN SARPs. These requirements include specific characteristics such as policy based routing and mobile end systems. ATN Air-Ground end-to-end services will be carried over the underlying IP-based ground networks, using an appropriate SNDCF or tunnelling technology. In ATN technical terms, this means that the IP network is used as a ground-ground ATN subnetwork via an appropriate SNDCF.X25IPL2KRouterATNATN data carried as user data over IP ground networks
19ATN and IP Co-Existence (2) ApplAOCATNApplIPPRATNRMobileIPATN MobileSubnetworkIPATNRATC centreGround IPNetworkATNApplAirlineATNRCOM
21Summary IP is the strategic solution for ground infrastructure Migration and implementation of ground applications to IP underway has startedATN is the strategic solution to support ATS air/ground applicationsImplementation of ATN well underwayCoexistence of IP and ATNECAC Communications Strategy available at :