1、 Report ITU-R M.2149(09/2009)Use and examples of mobile-satellite servicesystems for relief operation in the event ofnatural disasters and similar emergenciesM SeriesMobile, radiodetermination, amateurand related satellites servicesRep. ITU-R M.2149 ii Foreword The role of the Radiocommunication Sec
2、tor is to ensure the rational, 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
3、 functions of the Radiocommunication 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
4、 referenced in Annex 1 of 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
5、 the ITU-R patent information database can also be found. Series of ITU-R Reports (Also available online at http:/www.itu.int/publ/R-REP/en) Series Title BO Satellite delivery BR Recording for production, archival and play-out; film for television BS Broadcasting service (sound) BT Broadcasting serv
6、ice (television) 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
7、 fixed service systems SM Spectrum management Note: This ITU-R Report was approved in English by the Study Group under the procedure detailed in Resolution ITU-R 1. Electronic Publication Geneva, 2009 ITU 2009 All rights reserved. No part of this publication may be reproduced, by any means whatsoeve
8、r, without written permission of ITU. Rep. ITU-R M.2149 1 REPORT ITU-R M.2149 Use and examples of mobile-satellite service systems for relief operation in the event of natural disasters and similar emergencies (2009) TABLE OF CONTENTS Page 1 Introduction 2 1.1 The impact of orbits and satellite netw
9、ork architecture on coverage . 2 2 Modes of usage of MSS systems for disaster relief communications 3 2.1 Direct application of the MSS in disaster relief operations 3 2.1.1 Practical use of an MSS system for application of video image transmission . 3 2.2 Combining terrestrial and satellite network
10、 components . 5 2.2.1 Satellite component for backhaul of emergency terrestrial services 5 2.2.2 Satellite component for emergency backhaul for private terrestrial networks . 7 2.2.3 MSS networks with complementary ground component. 7 3 Examples of MSS systems which can provide disaster-related comm
11、unications 9 3.1 Iridium (HIBLEO-2). 9 3.2 Globalstar (HIBLEO-4) 10 3.3 Inmarsat 11 3.4 Thuraya . 13 3.5 SkyTerra . 15 3.6 TerreStar . 16 3.7 DBSD North America, Inc. 18 3.8 ACeS. 19 2 Rep. ITU-R M.2149 1 Introduction This Report describes how mobile-satellite service (MSS) systems can provide disas
12、ter relief radiocommunications. In addition, it provides descriptions of the operating and planned MSS systems which can provide such operations. The wide coverage area of an MSS system is particularly helpful as the location and time of occurrence of a disaster event is unpredictable and as an MSS
13、system operation is typically independent of local telecommunications infrastructure which may be lost by the disaster event, and given that MSS systems have wide-area earth coverage, they can provide for disaster relief telecommunications. Furthermore, most mobile earth stations (MESs) are battery
14、powered and so can operate for some period of time even if the local electricity supply is non-functioning and moreover some MESs also come with solar and/or wind chargers. Since MSS systems do provide very large coverage areas, spectrum coordination is accomplished on a regional or global basis. Ea
15、ch system is constrained to operate on frequencies authorized by Administrations as identified in Recommendation ITU-R M.1854. 1.1 The impact of orbits and satellite network architecture on coverage All low Earth orbit (LEO) and geostationary-satellite orbit (GSO) MSS systems provide service to very
16、 large coverage areas compared to terrestrial-based systems. In addition, some LEO MSS systems can also provide full earth coverage, including coverage of the polar areas, provided that some conditions are met. The coverage of a LEO system depends on the inclination of its orbit, as well as the arch
17、itecture of the system. Systems with satellites orbiting at lower inclination angles may not be able to cover polar regions, while systems with satellites orbiting at higher inclination angles close to 90 can cover the polar regions. Two different LEO system architectures have been employed. One is
18、the bent-pipe architecture, by which the satellite acts like an RF transponder between the user terminal and a gateway. This architecture requires that both the user terminal and a gateway station are visible to the satellite at the same time in order to allow the user terminal to access to the syst
19、em. The second architecture is based on forming a “network in the sky” through use of inter-satellite links (ISLs). The satellites perform on-board processing and routing operations. Such a system provides full earth coverage and does not require a terrestrial gateway in the footprint of the serving
20、 satellite. The “network in the sky” provides wide area coverage without the accessibility constraints mentioned with respect to the bent pipe architecture. In fact a single gateway any place in the world is sufficient to provide access to the system, however for more than one gateway accessibility
21、is ensured. The bent-pipe architecture is also used for GSO MSS. However, with GSO MSS, the visibility limitation is of practically no constraint in view of the fact that at least one gateway station is always visible. Some currently operational GSO MSS systems also have a multiple high gain spot be
22、am design, which provides the capability of digital beam forming and allows reconfiguration of the coverage and distribution of the system resources (spectrum and power) as and when needed. GSO MSS systems can provide wide-area coverage without the use of ISLs or multiple gateways. Rep. ITU-R M.2149
23、 3 2 Modes of usage of MSS systems for disaster relief communications There are two modes in which MSS systems can be applied for disaster relief communications. One is to operate the MSS system directly, providing portable handheld or transportable telecommunications between MSS terminals and the g
24、lobal infrastructure. The other is to interface between a local terrestrial-based system and the global infrastructure, by providing satellite-based backhaul services. 2.1 Direct application of the MSS in disaster relief operations The MSS systems currently in operation are able to provide voice and
25、 data radiocommunications and access to the Internet. Further, these systems can facilitate access to public and private networks external to the MSS system. Some currently operating LEO systems as well as a GSO system support an application known as “short message service” (SMS) that provides the a
26、bility to transmit or broadcast short text messages directly to handheld terminals. The GSO system also supports geo mobile packet radio service (GMPRS) which is the GPRS service over a satellite directly to handheld terminals thereby enabling such handheld terminals to access Internet. MSS systems
27、are also well suited to providing the distribution of information over widespread areas and of collecting information from remotely located transmitters over these same widespread areas. The information disseminated can be used to warn of impending disasters or to announce relief provisions. Informa
28、tion useful in predicting impending disasters can be easily collected using unattended, remotely located transmitters. MSS systems may be used in conjunction with sensor or local environmental data collection systems to transmit such data back to a central location that would be responsible for maki
29、ng decisions based on this retrieved data. 2.1.1 Practical use of an MSS system for application of video image transmission One possible example of applications for disaster relief communications using a GSO MSS is transmission of static or moving picture of suffered area in order to inform the resc
30、ue centre of the sufferers and/or a stricken area as a real on-going event and to help the centre to consider relief actions. It is thought to be very effective to see the actual scene in real time image for urgent relief activities. For the purpose of the transmission of video image, an MSS system,
31、 that has an ability to transfer data in the rate of more than 64 kbit/s at least, could be used. 4 Rep. ITU-R M.2149 Here two types of transmission of static and/or moving picture are shown. One is the use of integrated services digital network (ISDN) and another is the use of internet. It should b
32、e noted that ISDN is used in Japan and certain European countries. Use of ISDN Here ISDN is used to transmit data of pictures in 64 kbit/s between rescue centre and stricken area. Example system and general concepts of the network structure are depicted in Fig. 1. The MSS earth station has function
33、to process No. 7 signalling system and also ISDN protocol. The MSS terminal can be used in the stricken area as a portable high speed data terminal, that can be easily transportable and installable, or a semi-fixed high speed data terminal to vehicular. The MSS terminal has interface port of ISDN us
34、er interface and serial data port to connect with personal computer (PC). ISDN video phone has a function to connect to user ISDN switch on the terrestrial side and it has connection port with handy digital video camera. This video processing function realizes transmission of real time moving pictur
35、e and is easy to operate. Another way to transmit static or moving picture is to use PC with some suitable application software, that processes capturing video image, coding the video data, storing it in PCs hard disc, and transfer the stored data to addressed users PC when the link between two PCs
36、is once connected through the MSS system. This kind of system can be easily and urgently deployed and catch the required information on sufferers and disaster in the stricken area. FIGURE 1 Example-Static and/or moving picture transmission with use of MSS via ISDN network Report 2149-01Semi-fixed hi
37、gh speed data terminal tovehicularRescue centreISDN networkPicturetransmissionTransceiverVideo cameraDigital cameraPortablehigh speed dataterminalVideo cameraMoving picturetransmissionPCISDN TV TEL setPCPCISDN TV TEL setMonitorStored moving picturetransmission(high quality)Rep. ITU-R M.2149 5 Use of
38、 Internet Here Internet is used to transmit data including video information in packet data transmission base between rescue centre and stricken area with use of TCP/IP. One example system and general concepts of the network structure are depicted in Fig. 2. The MSS earth station has function to pro
39、cess TCP/IP. The MSS terminal can be used in the stricken area as a portable packet data transmission terminal, that can be easily transportable. The MSS terminal has data port to connect with PC. A way to transmit static or moving picture is to use PC installed with some video processing applicatio
40、n software, whose function has capturing video image, coding the video data, storing it in PCs hard disc, and transfer the stored data to addressed users PC when the link between two PCs is once connected through the MSS system. FIGURE 2 Example-static and/or moving picture transmission with use of
41、MSS via Internet Report 2149-02SAT operator E/SInternetService providerIPSec InternetIP-VPNEnd usersPortable video transmission system(PC + video processing software)Broadband satellitetransceiver UT: RouterGatewayearthstationPOPPOP: Point of presenceEnd usersEnd usersFunction added by eachService p
42、rovider-Router- L2 switch-Fire wall- Internet Protocol Security-etc.2.2 Combining terrestrial and satellite network components 2.2.1 Satellite component for backhaul of emergency terrestrial services One example of disaster relief radiocommunications using an MSS component is the backhaul of traffic
43、 from an emergency terrestrial replacement system to the global network. A small cellular telephone system or pico-cell can be set up to provide emergency terrestrial radiocommunications over a limited area, thus replacing the function of non-functioning or destroyed terrestrial facilities. Radiocom
44、munication with the rest of the world is provided through satellite links to gateway earth stations. Figure 3, depicts the MSS linked cellular pico-cell system used as a backhaul for a cellular pico-cell. The backhaul can be provided by GSO or non-GSO MSS system. In this example, the MSS linked cell
45、ular pico-cell consists of multiple voice-only satellite phones and one voice/data satellite phone. This provides for multiple simultaneous voice links or a combination of voice links with one 9.6 kbit/s data link. 6 Rep. ITU-R M.2149 The multiple voice-only satellite phones and one voice/data satel
46、lite phone have been placed into a large movable case for easy deployment to disaster areas or other remote locations in need of satellite communications. The cellular pico-cell system consists of: Pico-cell control unit (integrated mobile switching center /home location register /visitor location r
47、egister/base station controller). Modular base transceiver station (BTS) (transmit and receive) units. Bank of six MSS phones for communications with the terrestrial telephone network via satellite. One of the voice channels can be used for data instead of voice. The pico-cell control unit: Controls
48、 the operation of the BTS unit. Allows local phones to communicate directly with each other. Provides links between local cell phones and other telephone networks. This pico-cell solution is scalable on both the pico-cell control unit side which can handle many more BTS units and the MSS side, where
49、 additional 2 way trunks can be provided. At the MSS gateway earth station, a special control unit to interface between the MSS links and the global system for mobile communications (GSM), networks is installed. FIGURE 3 Cellular pico-cell linked to the public switched telephone network (PSTN) through an MSS system Report 2149-0312 345 678 9*8#PicoCell Control UnitMSC/HLR/VLR/BSCGSM MSCPSTNGSM phoneCalled partyBTS antenna(TRx)Gatewayearth stationVo i c ephoneVoice/dataphoneVo i c ephoneVo i c ephoneVo i c ephoneVo i c ephoneRep. ITU-R M.2149 7 2.2.2 Satellite component for
