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May 2005Version 03
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/ FREMMTechnical proposal
CSSI–ISC/344 BC/PT May 2004 /
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02A / May 2005 / CS-ISC / Reconditionned file
03 / May 2005 / CS-ISC / Work package updated
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/ EAVoIP
Technical document
Ver 03
May 2005
This document is the property of CS. It ca not be duplicated, disclosed to anybody without written authorization
Contents1. Introduction 2
1.1. WG67 Overview 2
1.1.1. Background and Scope 2
1.1.2. Bodies involved 2
1.1.3. WG67 works and possible applications 3
1.2. European ATM VoIP presentation 4
1.2.1. Motives 4
1.2.2. Objectives 4
2. The initial reference document 5
2.1. Vienna Agreement 5
2.2. Organisation and output documents related to Vienna Agreement 6
3. The EAVoIP VCS platform proposal 7
3.1. The project organisation 7
3.2. VCS platform phase 1 7
3.2.1. Radio 7
3.2.2. Telephone 9
3.3. VCS platform phase 2 10
3.3.1. Radio 10
3.3.2. Telephone 12
3.4. VCS platform phase 3 14
3.4.1. Radio 14
3.4.2. Telephone 15
3.5. VCS platform phase 4 16
4. Workpackage (WP) 19
4.1. Phase organization 19
4.2. Working Package Organization 20
4.3. Project organisation 21
4.4. Project logics 23
5. Estimated schedule 24
/ EAVoIPTechnical document
Ver 03
May 2005
This document is the property of CS. It ca not be duplicated, disclosed to anybody without written authorization
Chapter Error! Style not defined. > Error! Style not defined. / 241. Introduction
1.1. WG67 Overview
1.1.1. Background and Scope
Components of Ground- Ground ATM voice systems are currently using digital (TDM/PCM - Time Division Multiplexing / Pulsed Code Modulation) or analogue technology, otherwise some Voice Air Traffic management (ATM) simulation systems already use Voice-over-Internet Protocol (VoIP) Technology.
Convergence of voice and data into one multimedia network is observed on the market. As a consequence it can be said that the future ATM communication network will evolve into a common infrastructure for voice and data services.
As a result of the above described technological trends, it can now be foreseen that the capability of Voice over IP Technology may fulfil and improve operational and technical ATM communication requirements, including voice / data convergence, specific Quality of Services (QoS), security and safety requirements, at a justifiable cost when compared with current digital (TDM/PCM) and analogue technologies.
Eurocontrol EATM Ground-Ground Communications Strategy is foreseeing to integrate ATM IP Voice communications by 2010 in the on going ATM IP Data Network to build the Pan-European Network Services (PENS) for Data and Voice.
Similar initiatives are known to be underway internationally.
The decision to implement a new digital Voice Ground-Air link (i.e. controller-pilot radio link) to complement the current Amplitude Modulation Very High Frequency (AM-VHF) transmission is under discussion.
For these reasons, EUROCAE members decided to launch an ad-hoc WG: WG67, to provide technical and operational requirements for ATM VoIP Systems.
The WG67 work program is now defined. Four documents should be provided mid 2006:
A first one defining operational and technical ATM VoIP VCS requirements;
A second one defining components, belonging to ATM VoIP Systems, interoperability requirements
A third one defining Network requirements to interconnect ATM VoIP components;
A fourth one defining validation tests guide to prove ATM VoIP systems compliance to previous documents.
1.1.2. Bodies involved
To achieve these tasks, WG-67 will involve ANSPs, ATM Suppliers, Telecom Operators, RTCA and appropriate regulators and standardisation bodies (ICAO, Eurocontrol, ITU, ETSI …)
Liaison with military will be maintained by organisations such as Eurocontrol, Suppliers…
Results of WG 67 are anticipated to be presented to ICAO panel ANC for consideration as international recommendations.
1.1.3. WG67 works and possible applications
EUROCAE WG-67 is created with the following tasks:
1.1.3.1. Analyse the situation regarding:
operational and technical Air-Ground (A/G) and Ground-Ground (G/G) ATM Voice system requirements
IP Voice protocols and signaling standards
IP networks capability for Voice services
Security, QoS, Convergence (infrastructure, protocol, applications)
Existing IP Voice ATM systems and their service interfaces,
1.1.3.2. For ground-ground ATM communications WG 67 shall:
Define IP Voice ATM Systems and identify their components (Voice Communication System / VCS, Ground based Radio Station / GRS…) for these components suppliers are free to define internal technical solution
Determine possible additional operational and technical ATM requirements for new IP Voice ATM systems, also taking into consideration A/G communications.
Accordingly, make recommendations to upgrade current standardisation documents.
Develop a Technical Specification for an IP Voice ATM System. This document should be delivered within 2 years and will include:
Minimum performance and safety / security requirements for the system and, if appropriate, for components
Interoperability requirements between IP components of the IP Voice ATM systems
Minimum performance requirements of an IP Network aimed to support Voice in ATM.
Guidelines for qualification tests of IP Voice ATM systems and IP Voice ATM components;
1.1.3.3. For ground-ground segment of Air-Ground communications:
WG-67 shall be tasked with same tasks as 1.1.3.2) for the Ground segment of Air-Ground communications
1.1.3.4. For Air link communications:
WG 67 will monitor ATM Air link activities in order to stay in line with the right official AG evolution and to be able to adapt its work on eventual VoIP Air link field.
1.2. European ATM VoIP presentation
1.2.1. Motives
If, mid 2006, WG67 EUROCAE documents will define ATM VoIP components requirements, the true compliance to these “standards” will have to be demonstrate by real trials.
So EAVoIP project aims from 2007 to 2009 at demonstrating by many European companies providing ATM VoIP components their interoperability on a specific telecommunications network.
Such a project will ensure:
for European industry to pull ahead of on ATM VoIP Systems
to make European Single Sky easier through VCS interoperability
1.2.2. Objectives
The main EAVoIP objectives are within 30 months:
to provide an ATM VoIP System prototype compliant with EUROCAE WG67 requirements
to interconnect by a specific network interconnecting ATM VoIP components belonging to the previous prototype System
to verify and update WG67 EUROCAE documents becoming European Standards.
2. The initial reference document
2.1. Vienna Agreement
Vienna agreement define the limit of the specifications which have to be provided by WG67. This agreement will mainly take in account the interface between the different equipments as : VCS, Transceivers, Recorders and the network.
The objective of this document is to limit the definition to interface and not to interact in the different manufacturer’s products.
The Vienna agreement may be resumed by the following figure on which are described the different borders between equipments and network.
2.2. Organisation and output documents related to Vienna Agreement
EUROCAE WG67 tasked subgroups to compile operational, technical, safety and Quality of Service (QoS) requirements for ATC telephone and radio voice services (SG1), to study interoperability demands when connecting equipment of several manufacturers via a wide area network (WAN) and also identifying necessary IP-protocol enhancements to cover the ATC requirements (SG2), to compile networking requirements to cover the performance, QoS and safety requirements (SG3), to define test and process measurement to check the performance of the different interfaces (SG4)
Linked to the 4 subgroups,4 main documents will be produced:
Sub Group identification / Task responsibility / Output documentreference
WG67-1 / Requirement Sub Group to define VoIP ATM System operational and technical requirements / E67_Req_WG67-1_Vxx
WG67-2 / Interoperability Sub Group) to propose first, IP standards to fulfill operational and technical requirements, secondly IP interfaces between IP components as defined in “Vienna Agreement”: / E67_Interop_WG67-2_Vxx
WG67-3 / WAN Sub Group to write WAN requirements and performances to fulfill QoS required to interconnect IP components / E67_WAN_WG67-3_Vxx
WG67-4 / Test and measurement Sub Group to propose method and process to qualify IP interfaces / E67_WAN_WG67-4_Vxx
All the produced documents will be the reference for implementation of an IP architecture able to interconnect the different VCS components .
3. The EAVoIP VCS platform proposal
3.1. The project organisation
The proposed VCS platform using an IP interface is the conclusion of the WG67 project. To reach this target, several phases will be necessary to have a step by step platform implementation allowing progressive tests and controls of the solution.
4 phases are planned in this project:
Phase 1: Implementation and validation tests tools between IP interfaces and existing telephone and radio interfaces
Phase 2:: Adaptation and transmission of a Radio voice and signalling to existing analog transceivers through IP network.
Adaptation of Telephone signalling to Eurocontrol telephone ATSQSIG signalling through an IP network.
Phase 3: Connection of a Radio VCS through an IP network to a real Transceiver
Connection of a Telephone VCS to another VCS through an IP network
Phase 4: Implementation of 3 VCS and 3 transceivers sites and interconnection using an IP WAN
3.2. VCS platform phase 1
This phase consist of the development and implementation of testing tools allowing the validation of Radio and Telephone Interfaces using IP protocols
3.2.1. Radio
Object of the testing tool:
Control and validate the protocol and the performance of a Radio manufacturer interface or gateway on IP network.
INPUTS / OUTPUTSE67_Interop_WG67-1_Vxx Radio part
E67_Interop_WG67-2_Vxx Radio part
E67_WAN_WG67-3_Vxx
E67_TEST_WG67-4_Vxx Radio part / Hardware à: IP test equipment with audio external interfaces
Software: à Simulation tool for radio activity
à Audio transmit and receive control
à Sniffer to identify the input and output messages on IP network
à Performance measurment
à Management messages definition and test
The output of this phase is to provide an IP Test Tool for Radio interface validation
3.2.2. Telephone
Object: IP testing tool
Control and validate the protocol adaptation based on EUROCONTROL existing Telephone Signalling using IP interface or Gateway connected to an ATS-QSIG Test equipment
INPUTS / OUTPUTSE67_Interop_WG67-1_Vxx Telephone part
E67_Interop_WG67-2_Vxx Telephone part
E67_WAN_WG67-3_Vxx
E67_TEST_WG67-4_Vxx Telephone part
G703 Codirectional ATS-QSIG Tester / Hardware: à IP interface Gateway with G703 codirectional digital interface
Software: à Simulation tool for telephone activity
à Telephone ATS-QSIG signalling emulation
à Audio G728 transmit and receive control
à Sniffer to identify the input and output messages on IP network
à Performance measurment
à Management messages definition and test
The output of this phase is to provide an IP Test Tool for Telephone interface validation
3.3. VCS platform phase 2
This phase consist of the development and implementation of,
a radio gateway allowing the connection from a VCS or an IP VCS to a real transceiver through an IP network
a telephone gateway allowing the connection from a VCS or an IP VCS to an ATS QSIG interface through an IP network
3.3.1. Radio
Object of the Gateway interface:
Control and validate the protocol , the performance and the real interface between a VCS and a Radio Transceiver.
- By using existing interface and remote control
By connecting an IP VCS to the Radio gateway interface through the IP WAN
INPUTS / OUTPUTSE67_Interop_WG67-1_Vxx Radio part
E67_Interop_WG67-2_Vxx Radio part
E67_WAN_WG67-3_Vxx
E67_TEST_WG67-4_Vxx Radio part
Analog radio interface
Transceiver with analog interface
Remote control unit using analog 4 wires inband signalling
Radio VCS / Hardware à Transparent Gateway with analog interface + Control signals and IP interface
à Radio VCS IP adaptation
Software: àRTP protocol with CODEC qualification
à Signaling control protocol
à Performance validation
à Management definition
3.3.2. Telephone
Object of the Gateway interface:
Control and validate the protocol , the performance and the real interface with an ATS-QSIG access connected through a WAN IP network
Control and validate the protocol , the performance and the real interface with an IP VCS connected through a WAN IP network to an ATS QSIG interface
INPUTS / OUTPUTSE67_Interop_WG67-1_Vxx Telephone part
E67_Interop_WG67-2_Vxx Telephone part
E67_WAN_WG67-3_Vxx
E67_TEST_WG67-4_Vxx Telephone part
VCS system
ATS-QSIG equipment / Hardware à Transparent Gateway with ATS- QSIG interface + Control signals and IP interface
à Telephone VCS IP adaptation
Software: àRTP protocol with CODEC qualification
à ATS QSIG Signaling control protocol
à Performance validation
à Management definition
3.4. VCS platform phase 3
This phase consist of the development and implementation of,
the connection from a VCS or an IP VCS to a real transceiver using an IP interface through a WAN network
the connection between 2 x IP VCS through a WAN network
3.4.1. Radio
Object of the Radio IP interface:
To control and validate the protocol , the performances and the real interface between an IP VCS and Radio Transceivers using integrated equipments.. The test will have to qualify the radio functionnalities as CLIMAX, Coupling, Best Signal Selection
INPUTS /OUTPUTS
E67_Interop_WG67-1_Vxx Radio partE67_Interop_WG67-2_Vxx Radio part
E67_WAN_WG67-3_Vxx
E67_TEST_WG67-4_Vxx Radio part
Analog radio interface
Transceiver with analog interface
Transceivers with IP interface
Radio IP VCS
IP Radio Gateway
Radio Test tools / Hardware à IP Transceivers
à Radio VCS IP adaptation
Software: àRTP protocol with CODEC qualification
à Signaling control protocol
à Performance validation
à Radio Functionnamlities (Climax, BSS, Coupling..)
à Radio Management control
3.4.2. Telephone
Object of the Telephone IP interface:
To control and validate the protocol , the performances and the real interface between two IP VCS using integrated equipments.. The test will have to qualify the telephone functionnalities as EUROCONTROL functionnalities as: Called identification, Caller identification, Priority, interfunctionning with transit using R2 Eurocontrol and ATS QSIG
INPUTS / OUTPUTSE67_Interop_WG67-1_Vxx Telephone part
E67_Interop_WG67-2_Vxx Telephone part
E67_WAN_WG67-3_Vxx
E67_TEST_WG67-4_Vxx Telephone part
IP VCS telephone systems
ATS-QSIG interface adapter
R2 Terminal or tester
ATS QSIG tester / Hardware à Transparent Gateway with ATS- QSIG interface + Control signals and IP interface
à 2 xTelephone VCS IP system
Software:àRTP protocol with CODEC qualification
à ATS QSIG Signaling control protocol
à Telephone functionnalities validation: Call identification, routing, priority, transit, interfunctionnality with R2
à Performance validation
à Management definition
3.5. VCS platform phase 4
The objective of the phase 4 is to define a complete test system and to validate all the functionnalities necessary for ATC communication control. The phase 4 platform must be able to validate the following features: