Working paper wg i/Meeting 3/wp 306 aeronautical communications panel (acp)
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Abbreviation ListA ANSP(s) - Air Navigation Service Provider(s) ATC - Air Traffic Control ATM - Air Traffic Management C COTS - Commercial Off The Shelf D DFS - Detailed Functional Specification E EATMP - European ATM Programme ECAC - European Civil Aviation Conference EGIS - EUROCONTROL Guidelines for Implementation Support EIS - EATMP Implementation Support I IANA - Internet Assigned Numbers Authority ICAO - International Civil Aviation Organisation ICMP - Internet Control Message Protocol IGMP - Internet Group Management Protocol IEEE - Institute of Electrical and Electronics Engineers Inc. IHL - Internet Header Length IP - Internet Protocol IPv4 - Internet Protocol Version 4 IPv6 - Internet Protocol Version 6 L LAN - Local Area Network LLC - Logical Link Control M MAC - Medium Access Control MLD - Multicast Listener Discovery P PICS - Protocol Implementation Conformance Statement PRL - Profile Requirements List R RFC - Request for Comment S SSM - Source Specific Multicast STD - Standard T TX - Transmit ToS - Type of Services U UDP - User Datagram Protocol Multicast ServiceThe need to send the same information to multiple receivers is one of the main requirements of surveillance data distribution. This requirement can be supported by the Internet Protocol versions 4 and 6 (IPv4 and IPv6 respectively) multicast services. Other networking techniques that achieve the same multicast objective are not further considered within the scope of this document. A limited number of European States have deployed national IPv4 multicast services for surveillance data distribution. However, the limited range of the IPv4 multicast address space inhibits the deployment of scalable service within In recent years, significant technical progress has been made in the field of IP multicast, namely source specific multicast (SSM). Contrary to existing deployments on the basis of PIM-SM (Protocol Independent Multicast--Sparse Mode), SSM provides added simplicity and resiliency to the routing of IP multicast traffic and is ideally suited for surveillance needs. At present, there are no gateways to allow interworking between IPv4 and IPv6 multicast implementations. Planned European DeploymentsAs early as 2001, Eurocontrol and its Member States identified the need to introduce IPv6 for inter-ANSP data exchanges (which are typically cross-border) for both unicast and multicast network services. Indeed, surveillance data flows that cross national borders are required to use the IPv6 protocol due to the architecture of the trans-national backbone network. Surveillance data flows that remain inside national borders use either IPv4 or IPv6 depending on the architecture of the national network infrastructure. As source specific multicast (SSM) is particularly suited to inter-ANSP data exchanges, it use over IPv6 is recommended in a Eurocontrol guideline entitled “EUROCONTROL GUIDELINES FOR IMPLEMENTATION SUPPORT (EGIS) Part 5: COMMUNICATION & NAVIGATION SPECIFICATIONS, Chapter 12, SURVEILLANCE DISTRIBUTION OVER IP MULTICAST PROFILE REQUIREMENT LIST (PRL)”. Eurocontrol will indicate the URL of the above document once it is on-line. Furthermore it is recommended that all surveillance data transmitters or receivers that are intended to send or receive data beyond the local domain, ie across national borders, should be IPv6-compliant. The surveillance data is delivered using the source specific multicast (SSM) service. A data channel is defined by the combination of destination multicast address and source unicast address, and contains a single surveillance data flow. The following figure shows such an IPv6 multicast address: | 8 | 4 | 4 | 8 | 8 | 64 | 32 | +--------+----+----+--------+--------+----------------+----------+ |11111111|0011|1110|00000000|00000000| 000……………………000 | group ID | +--------+----+----+--------+--------+----------------+----------+
• Source-address (unicast address) • Multicast address (as indicated by the source application) • Port (default is 8600 for ASTERIX surveillance data in Europe) Annex 2Implementation of Voice over Internet Protocol (VoIP) Handbookfor Air Traffic Management (ATM) Applications Version 1.0 November 2006 TABLE OF CONTENTS Introduction 6 Background 6 Reference Documents 6 Abbreviations and Definitions 6 ATN Deployment Guidance 7 1.1 Network Layer Guidance 7 Network Layer Addressing 7 1.1.1 Basic IPV6 Address Space Assignments and BGP as Numbers 8 Transit Traffic 10 1.1.2 ATN/IPS QoS 11 1.1.3 QoS Management 12 Transport layer Guidance 15 1.1.4 General 15 1.1.5 Connection oriented and connectionless transmission 15 Transport layer addressing 16 Congestion Avoidance 16 Error Detection and Recovery 16 Application Layer Guidance 17 Application interface to the transport layer 17 Application interface to the network layer 17 IPS Security Guidance Material 17 IPsec Authentication Header and Encapsulating Security Payload 17 Authentication Header 18 Encapsulating Security Payload 19 IPsec Transport and Tunnel Modes 20 IPsec Key Management 20 Alternatives to IPv6 Security 21 1.1.6 Alternatives/Compliments to IPsec 23 1.1.7 Need for Security at Multiple Levels in Aviation Environment 23 2 VoIP Guidance 23 Annex 1 Example Implementation Guide 24 Scope of this document 24 Differences to previous edition 24 Use of the Document 24 General context 25 Organisation of the Document 25 Symbols Used 26 Link to the ATM 2000+ Strategy 27 Reference Documents 27 Communication Protocols Requirements 29 2.1 Introduction 29 IP Version 29 Data Link Layer 29 Ethernet Frame Format 30 IPv4 Addressing 31 IPv6 Addressing 32 Network Layer 33 Internet Protocol version 4 33 Internet Protocol version 6 36 ICMP 39
Transport layer 40 4.5.1 Addressing 40 UDP checksum 40 Limitation of maximum size of messages 41 SPECIFIC CONFIGURATION REQUIREMENTS 41 Surveillance Data Transmitter 41 Common (IPv4 and IPv6) configuration requirements 41 IP version 4 specific configuration requirements 41 P version 6 specific configuration requirements 42 Surveillance Data Receiver 43 Common (IPv4 and IPv6) configuration requirements 43 IP version 4 specific configuration requirement 44 IP version 6 specific configuration requirements 44 System Configuration Examples 44 Single Attached Multicast Receiver with one Incoming Flow per Interface 44 Multi-homed Multicast Receiver with one Incoming Flow per Interface 45 Receivers with Multiple Incoming Flows per Received Interface and Multihomed Transmitters 46 Multi-homed Transmitters and multiple transmissions of the same flow 47 Abbreviation List 57 Multicast Service 59 Planned European Deployments 59 Annex 2 61 Implementation of Voice over Internet Protocol (VoIP) Handbook 61 65
1.0 Introduction 65 1.1 Purpose 65 1.2 Scope 65 2.0 VoIP Overview 66 2.1 VoIP Implementation 67 2.1.1 Application Layer 69 2.1.2 Transport Layer 69 2.1.3 Network Layer 70 2.1.4 Link Layer 73 2.1.5 Physical Layer 73 2.1.6 Echo cancellation 73 2.1.7 Telephone Naming and Addressing 73 2.1.8 Quality Measurement 73 2.2 Quality of Services 73 2.3 Gateway 74 2.4 Gatekeeper 74 3.0 VoIP Architecture Characteristics 74 3.1 Assumptions 74 3.2 Voice over IP Components 74 3.3 Performance Parameters for VoIP Applications 74 3.4 Availability 75 3.5 Delay 75 Appendix A - Real-Time Multimedia Protocols 76 Appendix B - CODECs for VoIP technology 78 Appendix C - Multimedia Protocols: H.323 and SIP 83 Appendix D - Compression of IPv4 and IPv6 91 Appendix E - VoIP Security 97 Appendix F- Numbering and Addressing 107 3 Transition Mechanisms 114 Appendix G - VoIP Components 116 Appendix H - Bandwidth and Performance 119 Appendix I - QoS Criteria 126 Appendix K - Gateway/Gatekeeper 131 4 References 132 Lexicon 139
Directory: safety -> acp -> ACPWGF ACPWGF -> Information paper ACPWGF -> Joint meeting of the ACPWGF -> Working paper ACPWGF -> Amcp wgm/WP19 19 August 2002 Aeronautical Mobile Communication Panel (amcp) Working Group-m meeting Fifth Meeting Saint Petersburg, Russia, 19 to 23 August 2002 Agenda Item 4: satcom ACPWGF -> Acp wgf/16 wp 27 Rev. 1 International Civil Aviation Organization ACPWGF -> Working paper ACPWGF -> Working paper ACPWGF -> Airborne collision avoidance systems working group-a ACPWGF -> Working paper Download 0.77 Mb. Share with your friends:
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