1、INTERNATIONAL TELECOMMUNICATION UNION CCITT THE INTERNATIONAL TELEGRAPH AND TELEPHONE CON SU LTATIVE COMM ITTEE M.1130 (1 0/92) MAINTENANCE: MOBILE TELECOMMUNICATIONS SYSTEMS AND SERVICES GENERAL DEFINITIONS AND GENERAL PRINCIPLES OF OPERATION/MAINTENANCE PROCEDURES TO BE USED IN SATELLITE MOBILE SY
2、STEMS I Recommendation M.1130 CCITT RECMN*N-IJIJ 92 4862593 0576638 964 FOREWORD The CCITT (the Iiitcriiatioiial Telegraph aiid Telcplioric Coiisultativc Coininittee) is a perinaiiciit nrgaiii of the Iiiteriiatioiial Telecoininuiiicatioii Uiiioii (ITU). CCITT is respoiisible for studying tecliiiical
3、, operating :irid tariff rliicstioiis aiitl issuing Recornirieiidatioiis oil thein with a view to staiidardiziiig telecoininuiiicatioiis oii il worldwide hisis. Tlie Pleiiary Asscinbly of CCITT which inccts every four years, establishes the topics for study aiid approves Recoininciidatioiis prepared
4、 by its Study Groups. The approval of Recoinineudatians by the ineinbers of CCITT betweeii Pleiixy Asseinblies is covered by die procedure laid dowii iii CCITT Resolutioii No. 2 (Melbouriie, 1 OXX). Recoinineiitlatioii M. 1130 was prepared by Study Group IV aiid w;is approved urider the Resolutioii
5、No. 2 procedure on tlic 5th of October 1992. CCIT NOTE Iii this Recoininendatioii, die expression “Adiniriistratioii” is used for coiiciseiiess to iiidicatc both :i tclccoiiiinuriiaitioii adiniiiistratioii aiid a recognized private opcratiiig agency. O ITU 1993 All rights reserved. No part of this p
6、ublication inay be reproduced or utilized iii any forin or by amy inearis, elcctroiiic or niech:uiic:d, iricluiliiig photocopyiiig aiid inicrofilin, without peiinissioii in writing froin the ITU. Recommendation M.1130 ;ENERAL DEFINITIONS AND GENERAL PRINCIPLES OF OPERATION/MAINTENANCE PROCEDURES TO
7、BE USED IN SATELLITE MOBILE SYSTEMS (1992) AFstrcict: This Recommendation summarizes the main definitions and general principles of she iiiiuiiteiiatice/perations procedures. Keworcis: Satellite Mobile Systems Definitioris/Getieral Principles. The purpose of this Recommetidatioti is to summarize the
8、 main definitions and the general principles of the iniiiii teiiiiticc/operltioti procedures, which cari be applied to any satellite mobile systems (maritime, aeronautical and liiti); iii particular the definitions are in accordance with the last Radio Regulations issue of ITU, except for minor edit
9、orial changes. a) mobile-satellite service is a radiocommunication service - betweeii mobile earth sttions and one or more satellite; or - between mobile earth stations by means of one or more satellite. This service normally includes feeder links, necessary to connect the mobile earth station with
10、fixed end users on the ground. h) land earth station (LES) is an earth station in the fixed satellite service or, in some cases, in the mobile-satellite service, located at a specified fixed point (or within a specified area) on land to provide n feeder link for the mobile-satellite service. h. 1) c
11、oast earth station (CES) is a land earth station, as defined in point b), to provide a feeder link for the maritirne mobile-satellite service. h.2) aeronautical (ground) earth station (GES) is a land earth station, as defined in point b), to provide feeder link for the aeronautical mobile-satellite
12、service. b.3) base earth station (BES) is a land earth sttion, as defined in point b), to provide a feeder link for the liltid tnobile service. c) mobile earth station (MES) is an earth station in the mobile-satellite service, intended to be used while in motion or stztionary at unspecified points.
13、c.1) ship earth station (SES) is a mobile ecartb station, as defined in point c), located on board of a ship. c.2) aircraft earth station (AES) is a mobile earth station, as defined in point c), located on board of an aircraft. c.3) land mobile earth station (LMES) is a mobile earth station, as defi
14、ned in point c), capable of surface movement within the geographical limits of a country or a continent. It should be recognized that the services offered by mobile systems (e.g. voice, dzt, telex, etc.) are being specitled such that they will be, as far as practical, the same as those services offe
15、red on the fixed network with the sune operational procedures (tories, announcements, signais, etc.) being recognized and returned where appropriate. In the network designs there should be no restrictions to establishing international calls between mobile terminals in different mohile systems via th
16、e relevant fixed network(s). For example, a user of a terrestrial based mobile tennitial should be ahle to make mi inteniatiotial connection to a satellite based mobile terminal using the established ititenititiciiiitl call set-up prcmdures (see Recommendations F.111 i and E.220 2). Recommendation M
17、.1130 (10192) 1 With reference to the general principles to be applied in the operational/maintenance procedures the aim of the mobile-satellite system operator(s) should be to ensure the best performance of the service from the point of view of the - quality of the signal; - availability and reliab
18、ility of the system. This implies specific choices on - the sparing philosophy of the space segment; - - restoration plans between LES operators; periodic maintenance actions to be performed on LES and MES. Considering that the satellite mobile services (maritime, aeronautical and land) could face q
19、uite different oper(itionai and maintenance issues, these matters are specifically referred to in other M-Series Recommendations on mobile telecommunimtions systems and services. References il CCITT Recommendation F. 11 1 Principles of service for mobile systems. c21 CCITT Recommendation E.220 Interconnection of land mobile systems. 2 Recommendation M.1130 (10/92)
