1、STD-ETSI ETS 300 LbL-ENGL 1997 m 3400855 OL5b215 TA5 m EUROPEAN w 1 ELECOMMUNICATION STANDARD ETS 300 161 January 1997 Second Edition Source: ETSI TC-SES Reference: RWSES-00011 ICs: 33.020 Key words: Satellite, earth station, VSAT, control, NCF Satellite Earth Stations and Systems (SES); Centralized
2、 control and monitoring functions for Very Small Aperture Terminal (VSAT) networks ETSI European Telecommunications Standards Institute ETSI Secretariat Postal address: F-O6921 Sophia Antipolis CEDEX - FRANCE Office address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE X.400: c=fr,
3、a=atlas, p=etsi, s=secretariat - Internet: secretariatetci.fr Tel.: +33 4 92 94 42 O0 - Fax: +33 4 93 65 47 16 Copyright Notification: No pari may be reproduced except as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media. 8 European Tel
4、ecommunications Standards Institute 1997. All rights reserved. STD-ETSI ETS 300 LbL-ENGL 1997 3400855 OL5bZLb 911 D Page 2 ETS 300 161 : January 1997 Whilst every care has been taken in the preparation and publication of this document, errors in content, typographical or othetwise, may occur. If you
5、 have comments concerning its accuracy, please write to “ETSI Editing and Committee Support Dept.“ at the address shown on the title page. STD-ETSI ETS 300 LbL-ENGL 1997 3400855 OL5b2L7 858 Page 3 ETS 300 161: January 1997 Contents Foreword . 5 1 Scope 7 2 Normative references 7 3 Definitions 7 4 Ab
6、breviations . 8 5 Test report . 8 6 Specifications 8 Control Channel) 9 Suppression of VSAT transmissions . 9 VSAT transmission validation 10 6.5.1 VSAT transmission validation by the CCMF using internal CC(c) . 10 6.5.2 VSAT transmission validation by the CCMF using external CC(s) 11 Enabling VSAT
7、transmission . 11 Receive signal level monitoring facility 8 Frequency-error monitoring facility 9 6.1 6.2 6.3 6.4 6.5 6.6 History 12 - STD-ETSI ETS 300 1b1-ENGL 1777 m 1900855 O15b21B 77Li m Page 4 ETC 300 161: January 1997 Blank page - - STD-ETSI ETS 300 LbL-ENGL 1997 3900855 DL5b219 b20 W Page 5
8、ETC 300 161: January 1997 Foreword This second edition European Telecommunication Standard (ETS) has been produced by the Satellite Earth Stations and Systems (SES) Technical Committee of the European Telecommunications Standards Institute (ETS I). Every ETS prepared by ETSI is a voluntary standard.
9、 This ETS may contain text concerning type approval of the equipment to which it relates. This text should be considered only as guidance and does not make this ETS mandatory. Transposition dates Date of adoption Date of latest announcement of this ETS (doa): 20 December 1996 30 April 1997 Date of l
10、atest publication of new National Standard or endorsement of this ETS (dop/e): 31 October 1997 Date of withdrawal of any conflicting National Standard (dow): 31 October 1997 STD-ETSI ETS 300 LbL-ENGL 1997 3400855 OL5b220 342 H Page 6 ETS 300 161 : January 1997 Blank page - STD-ETSI ETS 300 161-ENGL
11、1997 W 3LI00855 OL5b221 289 Page 7 ETS 300 161: January 1997 1 Scope This second edition European Telecommunication Standard (ETS) is applicable to two-way (transmit and receive) as well as transmit only Very Small Aperture Terminals (VSATs) operating in the framework of a satallite network for digi
12、tal communications purposes. In these networks there is a set of control and monitoring functions at each VSAT and a separate set of Centralized Control and Monitoring Functions (CCMF). The control and monitoring functions are designed to limit interferences to users of the frequency spectrum due to
13、 a fault condition at a VSAT. ETS 300 160 2 specifies the control and monitoring functions of VSATs, as defined in ETS 300 159 l and ETS 300 332 3. These CCMF are applicable to VSAT networks operating in any configuration including star, mesh and point-to-point connections. This ETS specifies the CC
14、MF. NOTE: The use of the term “centralized“ does not imply any particular topology VSAT system. It refers to the fact that functions are implemented at system level. The CCMF which are the subject of this ETS constitute the set of functional entities that, at system level, monitor and control the co
15、rrect operation of all VSATs in a network. The VSATs of such networks are designed for unattended operation and with transmission capability limited to baseband digital signals. Transmission and reception at a VSAT relate to transmission and reception over the satellite. 2 Normative references This
16、ETS incorporates by dated or undated references, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to, or revisions of any of these publications apply t
17、o this ETS only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. 31 ETS 300 159: “Satellite Earth Stations and Systems (SES); Transmitkeceive Very Small Aperture Terminals (VSATs) used for data communications operatin
18、g in the Fixed Satellite Service (FSS) 11/12/14 GHz frequency bands“. ETS 300 160: “Satellite Earth Stations and Systems (SES); Control and monitoring functions at a Very Small Aperture Terminal (VSAT)“. ETS 300 332: “Satellite Earth Stations and Systems (SES); Transmitlreceive Very Small Aperture T
19、erminals (VSATs) used for data communications operating in the Fixed Satellite Service (FSS) 6 GHz and 4 GHz frequency bands“. 3 Definitions For the purposes of this ETS, the following definitions apply: control channel(s): A channel or channels by which VSATs receive control information from the CC
20、MF. response channel): A channel or channels by which VSATs transmit monitoring information to the CCMF. network: In this ETS a network is any network configuration including star, mesh and point-to-point configurations. internal control channel: A control channel which is carried by the VSAT networ
21、k via the same satellite as used for transmission of user data and within the internal protocol structure of the VSAT system. STD*ETSI ETS 300 LbL-ENGL 1997 H 3400855 OL5b222 115 Page 8 ETS 300 161 : January 1997 external control channel: A control channel which is either (i) carried by the VSAT net
22、work via the same or another satellite, but not within the internal protocol structure of the VSAT system, or (i) carried by the PSTN or some other means. Interna! response channel: A response channel which is carried by the VSAT network via the same satellite as used for transmission of user data a
23、nd within the internal protocol structure of the VSAT system. external response channel: A response channel which is either (i) carried by the VSAT network via the same or another satellite, but not within the internal protocol structure of the VSAT system, or (i) carried by the PSTN or some other m
24、eans. 4 Abbreviations For the purposes of this ETS, the following abbreviations apply: cc CCD CCE CCMF PSTN RC VSAT Control Channel Central Control Disable Central Control Enable Centralized Control and Monitoring Functions Public Switched Telephone Network Response Channel Very Small Aperture Termi
25、nal 5 Testreport The test report shall contain: - - - the test results. the type of control channel(s) (CC); the characteristics of the external CC(s) including protocols; 6 Specifications 6.1 Receive signal level monitoring facility Purpose: To be able to monitor the received signal level from any
26、transmitting VSAT. Specif ication: This specification applies if required by the manufacturer. At the CCMF there shall be a feature which shall be able to monitor the signal level of any VSAT transmission, on demand, at least one at a time. Verification: Compliance by documentary evidence, demonstra
27、tion, and explanation on how the CCMF detects a designated VSAT transmitting a carrier with an abnormal signal level. Page 9 ETS 300 161: January 1997 6.2 Frequency-error monitoring facility Purpose: To be able to monitor whether the error on the transmit frequency of a VSAT exceeds a predefined thr
28、eshold. Specif ication: This specification applies if required by the manufacturer. At the CCMF, there shall be a feature which shall be able to monitor the transmit frequency-error of a VSAT, with respect to the nominal carrier frequency, for any VSAT transmission, on demand, at least one at a time
29、. It shall be possible to modify the error threshold. Verif ication: Compliance by documentary evidence, demonstration, and explanation on how the CCMF detects a designated VSAT transmitting a carrier with an incorrect frequency. 6.3 Control Channel(s) Purpose: To provide for remote monitoring and c
30、ontrol of VSATs operating in the VSAT network. Specif ication: The CCMF shall have at least one control channel with each VSAT. The CC(s) shall be either internal to the VSAT network (via the same satellite and within the internal protocol structure of the system), or external to it (e.g. via the sa
31、me or another satellite system, via the Public Switched Telephone Network (PSTN), etc.). The availability of the external CC(s) and the number of the external CC(s) are not within the scope of this ETS. NOTE 1: NOTE 2: Some satellite operators may require that internal CC(s) are available. Verif ica
32、tion Compliance by documentary evidence and demonstration. 6.4 Suppression of VSAT transmissions Purpose: To inhibit transmissions from any VSAT or all VSATs with the CCMF. Specif ication: It shall be possible to suppress all transmissions from any individual VSAT. Additionally, for VSAT networks wi
33、th internal CC(s), it shall be possible to suppress all transmissions from all VSATs. The CCMF shall provide the mechanism to send the appropriate inhibit commands by, for instance, transmitting Central Control Disable (CCD) messages to the VSATs concerned on the CC(s). The execution by the system o
34、f the suppression of the transmissions from any VSAT, shall take no more than 1 minute via an internal CC, or no more than 1 minute via an external CC once the external CC is Set-up with the VSAT. STDmETSI ETS 300 LbL-ENGL 1997 3Li00855 OL5b224 T98 W Page 10 ETS 300 161 : January 1997 The execution
35、by the system of the suppression of the transmissions from all VSATs, shall take no more than 1 minute via an internal CC. The suppression of transmissions of a VSAT is defined in ETC 300 160 2. Verif ication: Compliance by documentary evidence and demonstration. 6.5 VSAT transmission validation For
36、 VSATs using internal CC(s), one of the two following methods shall be implemented to confirm that the transmissions by each VSAT are correctly received: - VSAT transmission validation by the CCMF. For this method the specification in subclause 6.5.1 shall apply; - VSAT transmission validation by an
37、y receiving station. For this method the relevant specification given in ETS 300 160 2 shall apply, and there is no specification for the CCMF. For VSATs using external CC(s) the specification in subclause 6.5.2 shall apply. 6.5.1 VSAT transmission validation by the CCMF using internal CC(s) Purpose
38、: For networks with transmit and receive VSATs with internal CC(s) to check the VSAT transmission with an internal RC with the CCMF, and to validate its transmission. Specification: The CCMF shall instruct each VSAT, which has been enabled to transmit, to transmit a status message either once or per
39、iodically by means of a “poll-for-status“ message. The “poll-for-status“ message shall be sent simultaneously with, or immediately after, an enable command, and may be sent on a regular basis. The “status message“ shall be received via an internal RC. The “status message“ shall be used by the CCMF t
40、o verify the correct transmission of the VSAT. Failure to receive the status message within a predefined system specific time period shall result in an alarm identifying the VSAT. Verif ication: Compliance by documentary evidence and demonstration. STDDETSI ETS 300 LbL-ENGL 1777 3Li00855 OL5b225 724
41、 Page 11 ETS 300 161: January 1997 6.5.2 VSAT transmission validation by the CCMF using external CC(s) Purpose: To validate the ability of the VSAT to continue to transmit. Specif ication: The CCMF shall be able on demand to send to any VSAT, at least one at a time, a “poll for status message“ via t
42、he CC(s), and it shall be able to receive the corresponding “status message“. The “status message“ shall be either: - received via an external RC. In that case, it will contain the values of the assigned EIRP and carrier frequencies of the VSAT; or - received via an internal RC. The “status message“
43、 shall be used by the CCMF to verify the correct transmission of the VSAT. Verification: Compliance by documentary evidence and demonstration. 6.6 Enabling VSAT transmission Purpose: To re-enable transmissions from a VSAT, or VSATs, whose transmissions have previously been suppressed. Specif ication
44、: At the CCMF it shall be possible, by means of a Central Control Enable (CCE) message, to re-authorize transmission for any, or all VSATs, whose transmission have previously been suppressed. Verification: Compliance by documentary evidence and demonstration. STD-ETSI ETS 300 LbL-ENGL 1997 3400855 OL5b22b AbCl October 1996 January 1997 Page 12 ETS 300 161 : January 1997 Vote V 113: 1996-1 0-21 to 1996-1 2-1 3 Second Edition History Document history November 1992 1 First Edition PE 102: 1996-02-1 94 to 1996-06-1 ISBN 2-7437-1229-5 - Edition 2 Dpt lgal : Janvier 1997
