1、 Recommendation ITU-R M.2092-0 (10/2015) Technical characteristics for a VHF data exchange system in the VHF maritime mobile band M Series Mobile, radiodetermination, amateur and related satellite services ii Rec. ITU-R M.2092-0 Foreword The role of the Radiocommunication Sector is to ensure the rat
2、ional, equitable, efficient and economical use of the radio-frequency spectrum by all radiocommunication services, including satellite services, and carry out studies without limit of frequency range on the basis of which Recommendations are adopted. The regulatory and policy functions of the Radioc
3、ommunication Sector are performed by World and Regional Radiocommunication Conferences and Radiocommunication Assemblies supported by Study Groups. Policy on Intellectual Property Right (IPR) ITU-R policy on IPR is described in the Common Patent Policy for ITU-T/ITU-R/ISO/IEC referenced in Annex 1 o
4、f Resolution ITU-R 1. Forms to be used for the submission of patent statements and licensing declarations by patent holders are available from http:/www.itu.int/ITU-R/go/patents/en where the Guidelines for Implementation of the Common Patent Policy for ITU-T/ITU-R/ISO/IEC and the ITU-R patent inform
5、ation database can also be found. Series of ITU-R Recommendations (Also available online at http:/www.itu.int/publ/R-REC/en) Series Title BO Satellite delivery BR Recording for production, archival and play-out; film for television BS Broadcasting service (sound) BT Broadcasting service (television)
6、 F Fixed service M Mobile, radiodetermination, amateur and related satellite services P Radiowave propagation RA Radio astronomy RS Remote sensing systems S Fixed-satellite service SA Space applications and meteorology SF Frequency sharing and coordination between fixed-satellite and fixed service s
7、ystems SM Spectrum management SNG Satellite news gathering TF Time signals and frequency standards emissions V Vocabulary and related subjects Note: This ITU-R Recommendation was approved in English under the procedure detailed in Resolution ITU-R 1. Electronic Publication Geneva, 2015 ITU 2015 All
8、rights reserved. No part of this publication may be reproduced, by any means whatsoever, without written permission of ITU. Rec. ITU-R M.2092-0 1 RECOMMENDATION ITU-R M.2092-0, Technical characteristics for a VHF data exchange system in the VHF maritime mobile band (2015) Scope This Recommendation p
9、rovides the technical characteristics of a VHF data exchange system (VDES) which integrates the functions of VHF data exchange (VDE), application specific messages (ASM) and the automatic identification system (AIS) in the VHF maritime mobile band (156.025-162.025 MHz). Keywords Maritime, VHF, VDES,
10、 ASM, data, exchange Glossary 3GPP Third generation partnership project ACK Acknowledgement ADDC Assigned data transfer ACPR Adjacent channel power ratio AIS Automatic identification system AOS Acquisition-of-signal APSK Amplitude phase shift keying ARQ Automatic repeat request ARSC Announcement res
11、ponse channel ASC Announcement signalling channel ASM Application-specific messages AWGN Additive white Gaussian noise BBSC Bulletin board signalling channel BCH Bose Chaudhuri Hocquenghem, an error-correcting-code BER Bit error rate BPSK Binary phase shift keying BT Bandwidth-time CEPT European con
12、ference of postal and telecommunications administrations CDMA Code division multiple access CG Coding gain CIR Carrier to interference ratio The use of some frequencies in the band 156-164 MHz, contained in this Recommendation, do not comply with the RR currently in force. This Recommendation theref
13、ore should not be seen as prejudging the decisions of WRC-15. ITU-R Study Group 5 is invited to review this Recommendation taking into account the decisions made by WRC-15. Note by the BR Secretariat The figures in this Recommendation are available in English only. The other languages will be prepar
14、ed in due course. 2 Rec. ITU-R M.2092-0 C/M Carrier to multipath CNR Carrier to noise ratio COMSTATE Communication state CPM Continuous phase modulation CQI Channel quality indicator CR Code rate CRC Cyclic redundancy check CRL Configuration revision level CS Carrier sense CIRM Comit international r
15、adio maritime CSTDMA Carrier sense time division multiple access CW Continuous wave DA Doherty amplifier DLS Data link service DPD Digital pre-distortion EDN End delivery notification EDF End delivery failure EIRP Equivalent isotropic radiated power (e.i.r.p.) ERP Effective radiated power (e.r.p.) E
16、T Envelope tracking FATDMA Fixed access time-division multiple access FCS Frame check sequence FEC Forward error correction FIFO First-in first-out GMSK Gaussian-filtered minimum shift keying GNSS Global navigation satellite system HS Hexslots IALA International association of marine aids to navigat
17、ion and lighthouse authorities ICAO International civil aviation organization ID Identification IEC International electrotechnical commission IMO International maritime organization IP Internet protocol ITDMA Incremental time division multiple access LC Logical channels LEO Low-earth orbiting LFSR L
18、inear feedback shift register LME Link management entity LNA Low noise amplifier LOS Loss-of-signal Rec. ITU-R M.2092-0 3 LSB Least significant bit MEO Medium-earth orbiting MAC Media access control MCS Modulation and coding scheme MDC Multicast data channel MMSI Maritime mobile service identity MSB
19、 Most significant bit NF Noise figure NM Nautical mile NRZI Non-return to zero inversion OFDM Orthogonal frequency division multiplexing OSI Open systems interconnection PAPR Peak to average power ratio PC Physical channels PL Physical layer PFD Power flux-density ppm parts per million PSK Phase shi
20、ft keying QAM Quadrature amplitude modulation QPSK Quadrature phase shift keying RADC Random access short messaging channel RATDMA Random access time-division multiple access RAC Random access channel RF Radio frequency RSC Recursive systematic convolutional RQSC Random access resource request RR Ra
21、dio regulations RSSI Received signal strength indication SCTDMA Slot carrier sense time division multiple access SFTP Secure file transfer protocol SI Selection interval SMTP Simple mail transfer protocol SNMP Simple network management protocol SNR Signal to noise ratio SOLAS Safety of life at sea c
22、onvention SOTDMA Self-organized time division multiple access SS Spreading sequences Sym Symbol SYNC Synchronization TBB Terrestrial bulletin board 4 Rec. ITU-R M.2092-0 TBBSC Terrestrial bulletin board signalling channel TDMA Time division multiple access UDC Unicast data channel UDP User data prot
23、ocol UTC Coordinated universal time VDE VHF data exchange VDES VHF data exchange system VDE-SAT VHF data exchange-satellite VDL VHF data link VHF Very high frequency References RD-1 ETSI EN 302 583 (V1.2.1) Digital Video Broadcasting (DVB); Framing Structure, channel coding and modulation for Satell
24、ite Services to Handheld devices (SH) below 3 GHz. RD-2 TM Synchronization and Channel Coding. Recommendation for Space Data System Standards, CCSDS 131.0-B-2. Blue Book. Issue 2. Washington, D.C.: CCSDS, August 2011. RD-3 R. Mueller, On Random CDMA with Constant Envelope, ISIT 2011. RD-4 Recommenda
25、tion ITU-R P.372 Radio Noise. RD-5 Recommendation ITU-T V.42 (03/2002) Series V: Data Communication over the Telephone Network Error control Error-correcting procedures for DCEs using asynchronous-synchronous conversions. The ITU Radiocommunication Assembly, considering a) that the International Mar
26、itime Organization (IMO) has a continuing requirement for a universal shipborne automatic identification system (AIS); b) that the use of a universal shipborne AIS allows efficient exchange of navigational data between ships and between ships and shore stations, thereby improving safety of navigatio
27、n; c) that the VHF data exchange system (VDES) should use appropriate access schemes that ensure the protection of AIS while making efficient use of the spectrum and accommodate all users; d) that while AIS is used primarily for surveillance and safety of navigation purposes in ship-to-ship use, shi
28、p reporting and vessel traffic services applications, a growing need for other maritime safety related communications has developed; e) that the VDES shall give priority to AIS, and also accommodate future expansion in the number of users and diversification of data communications applications, incl
29、uding vessels which are not subject to IMO AIS carriage requirements, aids to navigation and search and rescue; f) that the VDES has data communications capacity and technical characteristics that support the harmonized collection, integration, exchange, presentation and analysis of marine informati
30、on on board and ashore by electronic means to enhance berth to berth navigation and related services for safety and security at sea and protection of the marine environment, recognizing that the implementation of VDES must ensure that the functions of digital selective calling, AIS and voice distres
31、s, safety and calling communication (Channel 16), are not impaired, Rec. ITU-R M.2092-0 5 noting that Report ITU-R M.2371 describes the use cases and requirement for VDES, recommends 1 that VDES should be designed in accordance with the operational characteristics given in Annex 1 and the technical
32、characteristics and examples given in Annexes 2 to 7; 2 that applications of the VDES which make use of application specific messages (ASM) designed for AIS, as defined in Recommendation ITU-R M.1371 should also take into account the international application identifier branch, as specified in IMO S
33、N.1/Circ. 289, maintained and published by IMO; 3 that the design and installation of VDES should also consider relevant technical requirements, recommendations and guidelines published by IMO, IEC and IALA. Annex 1 Operational characteristics of a VHF data exchange system in the VHF maritime mobile
34、 band 1 General 1.1 The system should give its highest priority to the automatic identification system (AIS) position reporting and safety related information. 1.2 The system installation should be capable of receiving and processing the digital messages and interrogating calls specified by this Rec
35、ommendation. 1.3 The system should be capable of transmitting additional safety information on request. 1.4 The system installation should be able to operate continuously while under way, moored or at anchor. 1.5 The system should use for the terrestrial links time-division multiple access (TDMA) te
36、chniques, access schemes and data transmission methods in a synchronized manner as specified in the Annexes. 1.6 The system should be capable of various modes of operation, including the autonomous, assigned and polled modes. 1.7 The system should provide flexibility for the users in order to priori
37、tize some applications and, consequently, adapt some parameters of the transmission (robustness or capacity) while minimizing system complexity. 1.8 The system should address the use cases identified in Report ITU-R M.2371. 2 VHF data exchange system functions and frequency usage VDES functions and
38、frequency usage are illustrated pictorially in Fig. A1-1. Figure A1-2 illustrates the VDES defined in this Recommendation from a system engineering perspective. 6 Rec. ITU-R M.2092-0 FIGURE A1-1 VHF data exchange system functions and frequency usage NOTE SAT Up is receive-only by satellite. 2.1 VHF
39、data exchange system channel usage in accordance with RR Appendix 18 2.1.1 VHF data exchange system: data exchange between terrestrial stations AIS 1 (channel 2087) and AIS 2 (channel 2088) are AIS channels, in accordance with Recommendation ITU-R M.1371 ASM 1 (channel 2027) and ASM 2 (channel 2028)
40、 are the channels used for application specific messages (ASM) VDE1-A lower legs (channels 1024, 1084, 1025, 1085) are ship-to-shore VDE VDE1-B upper legs (channels 2024, 2084, 2025, 2085) are shore-to-ship and ship-to-ship VDE. 2.1.2 VHF data exchange system: data exchange between satellites and te
41、rrestrial stations AIS 1 (channel 2087) and AIS 2 (channel 2088) are terrestrial AIS channels that are also used as uplinks for receiving AIS messages by satellite Long Range AIS using channel 75 and channel 76 are specified channels to be used as uplinks for receiving AIS messages by satellite. SAT
42、 Up1 (channel 2027) and SAT Up 2 (channel 2028) are used for receiving ASM by satellite SAT Up3 (channels 1024, 1084, 1025, 1085, 1026 and 1086) are used for ship-to-satellite VDE uplinks Rec. ITU-R M.2092-0 7 SAT Downlink (channels 2024, 2084, 2025, 2085, 2026 and 2086) are used for satellite-to-sh
43、ip VDE downlinks. 2.1.3 Technical characteristics 2.1.3.1 Shipborne VHF data exchange system receivers are protected As in AIS, shipborne VDES receivers are on the upper legs of RR Appendix 18, 4.6 MHz above the lower legs, which facilitates protection by filtering from receiver blocking by ships VH
44、F radios. 2.1.3.2 SAT Downlink The satellite downlink complies with the power flux-density (PFD) mask described in Table A4-1 to minimize interference to terrestrial services and to maximize reception by ship VDES stations. 2.1.3.3 VDE1 uses both legs of the duplex channels Channel capacity is utili
45、zed for the duplex channels in VDE1 by using the lower legs (VDE1-A) for ship-to-shore and the upper legs (VDE1-B) for shore-to-ship and ship-to-ship digital messaging. Table A1-1 describes the RR Appendix 18 channels used for the various applications of VDES. TABLE A1-1 RR Appendix 18 channels for
46、VHF data exchange systems applications: Automatic identification system, application specific messages, VHF data exchange RR Appendix 18 channel number Transmitting frequencies (MHz) Ship stations (ship-to-shore) (long range AIS) Ship stations (ship-to-satellite) Coast stations Ship stations (ship-t
47、o-ship) Satellite-to-ship AIS 1 161.975 161.975 AIS 2 162.025 162.025 75 (long range AIS) 156.775 (ships are Tx only) N/A 76 (long range AIS) 156.825 (ships are Tx only) N/A 2027 (ASM 1) 161.950 (2027) 161.950 (2027) 2028 (ASM 2) 162.000 (2028) 162.000 (2028) 24/84/25/85 (VDE 1) 24 84 25 85 24/84/25
48、/85/26/86 (Ship-to-satellite, satellite-to-ship) 24 84 25 85 26 86 100/150 kHz channel (24/84/25/85, lower legs (VDE1-A) merged) Ship-to-shore (24/84/25/85/26/86) Ship-to-satellite 100/150 kHz channel (24/84/25/85, upper legs (VDE1-B) merged) Ship-to-ship, Shore-to-ship (24/84/25/85/26/86) Satellite
49、-to-ship 157.200 (1024) 161.800 (2024) 157.225 (1084) 161.825 (2084) 157.250 (1025) 161.850 (2025) 157.275 (1085) 161.875 (2085) 157.300 (1026) 161.900 (2026) 157.325 (1086) 161.925 (2086) 8 Rec. ITU-R M.2092-0 FIGURE A1-2 VHF data exchange system functions and frequency usage engineers perspective S H I PA S MA I SS A T E L L I T EL o n g R a n g e A I S C H 7 5S H O R EA S M V D EA I SA I S 2A I S 1S A T U p 2A S M 2S h i p 2 S h o r es h i p 2 s h o r eS H I PA S MA I SS A T U p 1A S M 1S A T 1D o w n l i n kV D E 3 A S M 2S A T U p 3
