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1 INTERNATIONAL STANDARD IEC First edition Maritime navigation and radiocommunication equipment and systems Automatic identification system (AIS) Part 1: AIS Base Stations Minimum operational and performance requirements, methods of testing and required test results IEC 2007 Copyright - all rights reserved No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland Telephone: Telefax: Web: Commission Electrotechnique Internationale International Electrotechnical Commission Международная Электротехническая Комиссия PRICE CODE XD For price, see current catalogue
2 IEC:2007(E) CONTENTS FOREWORD...4 INTRODUCTION Scope Normative references Symbols and abbreviations Functional layout of an AIS Base Station General Functional block diagram of an AIS Base Station General VDL requirements Functional diagram for operation of a Base Station Base Station input/output sentence formatters Functional definition of the radio interface of the AIS Base Station General requirements of the physical layer Required parameter settings for the physical layer of the AIS Base Station Minimum requirements for the TDMA transmitter of the AIS Base Station Minimum requirements for the TDMA receivers of the AIS Base Station Shutdown procedure for an AIS Base Station Requirements for AIS Base Station General Dependent Base Station requirements Independent Base Station requirements BIIT conditions Further requirements for optional features Functional definition of the presentation interface of the AIS Base Station Physical requirements for the presentation interface Presentation interface data exchange Tests of AIS Base Stations method of measurement and required results Test conditions Physical radio tests Transceiver protection test TDMA transmitter TDMA receivers Conducted spurious emissions at the antenna Functional tests for Base Station Pre-set-up Normal operation Intentional slot reuse (link congestion) Comment Block Encapsulation...73 Annex A (informative) Proposed additional IEC AIS sentences...75 Figure 1 Functional block diagram of an AIS Base Station...9 Figure 2 Functional block diagram dependent and independent operation...11 Figure 3 General processing diagram...17 Figure 4 General processing diagram...18
3 IEC:2007(E) 3 Figure 5 Flow diagram for AIS Base Station response to VDM input...21 Figure 6 Format for repeating four-packet cluster...25 Figure 7 Measurement arrangement...28 Figure 8 Measurement arrangement...29 Figure 9 Modulation spectrum for slotted transmission 25 khz...30 Figure 10 Modulation spectrum for slotted transmission at optional 12,5 khz...31 Figure 11 Measurement arrangement for modulation accuracy...31 Figure 12 Power versus time mask...33 Figure 13 Measurement arrangement...34 Figure 14 Measurement arrangement...35 Figure 15 Measurement arrangement...36 Figure 16 Measurement arrangement...37 Figure 17 Measurement arrangement...38 Figure 18 PER/BER or SINAD measuring equipment...40 Figure 19 Measurement arrangement for inter-modulation...42 Figure 20 Measurement arrangement for blocking or de-sensitisation...43 Table 1 Base Station input/output sentence formatters...12 Table 2 Required parameter settings for an AIS Base Station...14 Table 3 Required settings of physical layer constants...14 Table 4 Bandwidth related parameters of the physical layer of the AIS Base Station...14 Table 5 Minimum required TDMA transmitter characteristics...15 Table 6 Minimum TDMA receiver characteristics...15 Table 7 Base Station response to input messages from the VDL...17 Table 8 Base Station response to input messages from the VDL...19 Table 9 BIIT alarm conditions monitored by an AIS Base Station...22 Table 10 Content of first two packets...25 Table 11 Fixed PRS data derived from ITU-T O Table 12 Maximum values of absolute measurement uncertainties...27 Table 13 Definition of timings for Figure Table 14 Frequencies for inter-modulation tests...42
4 IEC:2007(E) INTERNATIONAL ELECTROTECHNICAL COMMISSION MARITIME NAVIGATION AND RADIOCOMMUNICATION EQUIPMENT AND SYSTEMS AUTOMATIC IDENTIFICATION SYSTEM (AIS) Part 1: AIS Base Stations Minimum operational and performance requirements, methods of testing and required test results FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as IEC Publication(s) ). Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and non-governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC National Committees. 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user. 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publications. Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter. 5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any equipment declared to be in conformity with an IEC Publication. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of its technical committees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications. 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC has been prepared by IEC Technical Committee 80: Maritime navigation and radiocommunication equipment and systems. The text of this standard is based on the following documents: FDIS 80/460/FDIS Report on voting 80/468/RVD Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
5 IEC:2007(E) 5 A list of all parts of IEC series, under the general title: Maritime navigation and radiocommunication equipment and systems Automatic Identification System (AIS) can be found on the IEC website. The committee has decided that the contents of this publication will remain unchanged until the maintenance result date indicated on the IEC web site under " in the data related to the specific publication. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. A bilingual version of this publication may be issued at a later date.
6 IEC:2007(E) INTRODUCTION Chapter V of the International Convention for the Safety of Life at Sea 1974 (SOLAS) requires mandatory carriage of Automatic Identification System (AIS) equipment on all vessels constructed on or after 01 July Carriage for other types and sizes of SOLAS Convention vessels was required to be completed not later than 31 December SOLAS Chapter V, Regulation 19, clause states that AIS shall: 1 provide automatically to appropriate equipped shore stations, other ships and aircraft information, including ship's identity, type, position, course, speed, navigational status and other safety-related information; 2 receive automatically such information from similarly fitted ships; 3 monitor and track ships; and 4 exchange data with shore-based facilities. In addition, the IMO performance standards for AIS state that: The AIS should improve the safety of navigation by assisting in the efficient navigation of ships, protection of the environment, and operation of Vessel Traffic Services (VTS), by satisfying the following functional requirements: 1 in a ship-to-ship mode for collision avoidance; 2 as a means for littoral States to obtain information about a ship and its cargo; and 3 as a VTS tool, i.e. ship-to-shore (traffic management). The AIS should be capable of providing to ships and to competent authorities, information from the ship, automatically and with the required accuracy and frequency, to facilitate accurate tracking. Transmission of the data should be with the minimum involvement of ship's personnel and with a high level of availability. The provision of Shore Based AIS will be necessary to attain the full benefit of the SOLAS Convention requirements. This part of IEC provides the minimum operational and performance requirements, methods of test and the required test results for AIS Base Stations. The testing is divided into three sections, the transceiver tests, the logical tests and the Presentation Interface tests. These are captured in Clauses 8, 9 and 10 respectively. The method used for testing is that the EUT should meet all the tests requirements of Clause 8 before proceeding to Clause 9. Likewise, the unit should meet all of the test requirements before proceeding to Clause 10. Clause 10 has also been prioritised so that the tests are progressive Clauses 5 to 7 provide functional requirement information and Clause 8 provides the general test environment for the EUT.
7 IEC:2007(E) 7 MARITIME NAVIGATION AND RADIOCOMMUNICATION EQUIPMENT AND SYSTEMS AUTOMATIC IDENTIFICATION SYSTEM (AIS) Part 1: AIS Base Stations Minimum operational and performance requirements, methods of testing and required test results 1 Scope This part of IEC specifies the minimum operational and performance requirements, methods of testing and required test results for AIS Base Stations, compatible with the performance standards adopted by IMO Res. MSC.74 (69), Annex 3, Universal AIS. It incorporates the technical characteristics of non-shipborne, fixed station AIS equipment, included in recommendation ITU-R M.1371 and IALA Recommendation A-124. Where applicable, it also takes into account the ITU Radio Regulations. This standard takes into account other associated IEC international standards and existing national standards, as applicable. This standard is applicable for AIS Base Stations. It does not include specifications for the display of AIS data on shore. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC , Maritime navigation and radiocommunication equipment and systems Global navigation satellite systems (GNSS) Part 1: Global positioning system (GPS) Receiver equipment Performance standards, methods of testing and required test results IEC , Maritime navigation and radiocommunication equipment and systems Digital interfaces Part 1: Single talker and multiple listeners ITU-R M , Interim solutions for improved efficiency in the use of the band MHz by stations in the maritime mobile service ITU-R M.1371, Technical characteristics for an automatic identification system using time division multiple access in the VHF maritime mobile band ITU-T O.153, Basic parameters for the measurement of error performance at bit rates below the primary rate IALA Recommendation A-124 on Automatic Identification System (AIS). Shore Station and networking aspects relating to the AIS Service IALA technical clarifications to ITU Recommendation ITU-R M RTCM SC104 RTCM Recommended Standards for Differential GNSS (Global Navigation Satellite Systems) Service