《TIA-IS-J-STD-781-SERIES-03.050-2001.pdf》由会员分享，可在线阅读，更多相关《TIA-IS-J-STD-781-SERIES-03.050-2001.pdf（49页珍藏版）》请在三一文库上搜索。
1、JOINT INTERIM STANDARD GMR-2 Series 03 (03.050) Network Specifications - Transmission Planning Aspects of the Speech Service in the Public Satellite Mobile Network (PSMN) System IS-J-STD-781-Series 3 NOVEMBER 2001 TELECOMMUNICATIONS INDUSTRY ASSOCIATION Rcprewnting the telennimunicationv indusiry in
2、 aysociaion with the Electronic Indusiria Alliance Elsctron ic Ind wtries. Allia nee EUROPEAN TELECOMMUNICATIONS STANDARDS INSTITUTE Copyright Telecommunications Industry Association Provided by IHS under license with EIALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/29/2007
3、 03:04:22 MDTNo reproduction or networking permitted without license from IHS -,-,- NOTICE FROM THE TELECOMMUNICATIONS INDUSTRY ASSOCIATION TIA/EIA Engineering Standards and hblications are designed to serve the public interest through eliminating misunderstandings between manufacturers and purchase
4、rs, facilitating interchangeability and improvement of products, and assisting the purchaser in selecting and obtaining with minimum delay the proper product for his particular need. Existence of such Standards and hblications shall not in any respect preclude any member or nonmember of TIA/EIA from
5、 manufacturing or selling products not conforming to such Standards and hblications, nor shall the existence of such Standards and hblications preclude their voluntary use by those other than TIA/EIA members, whether the standard is to be used either domestically or internationally. Standards and hb
6、lications are adopted by TIA/EIA in accordance with the American National Standards Institute (ANSI) patent policy. By such action, TIA/EIA does not assume any liability to any patent owner, nor does it assume any obligation whatever to parties adopting the Standard or hblication. Note: The users at
7、tention is called to the possibiliS, that compliance with this document may require use o f one or more inventions covered by patent rights. By publication o f this standard, Interim Standard, or TSB, no position is taken with respect to the validio o f those claims or o f any patent rights in conne
8、ction therewith. The patent holder) so far identified have, however, filed statements o f willingness to grant licenses under those rights on reasonable and nondiscriminatory terms and conditions to applicants desiring to obtain such licenses. Details may be obtained from the standards developer. TI
9、A/EIA AND JOINT INTERIM STANDARDS Joint Interim Standards contain information deemed to be of technical value to the industry, and are published at the request of the originating Committee without necessarily following the rigorous public review and resolution of comments which is a procedural part
10、of the development of an American National Standard (ANS). Interim Standards should be reviewed on a periodic basis by the formulating Committee and a decision made on whether to proceed to develop a TIA/EIA Standard on this subject. Interim Standards must be upgraded or cancelled by the Committee b
11、efore the end of their third year of existence. hblication of this Joint Interim Standard for trial use and comment has been approved by the Telecommunications Industry Association. Distribution of this Joint Interim Standard for comment shall not continue beyond 36 months from the date of publicati
12、on. It is expected that following this 36 month period, this Joint Interim Standard, revised as necessary, will be submitted to the American National Standards Institute for approval as an American National Standard. Suggestions for revision should be directed to: Standards Recomputed delays Editori
13、al changes: ETSI reference numbers added; WI number changed; new introduction added; all GMR#6 the second digit (m) is incremented for all other types of changes, i.e. technical enhancements, corrections, updates, etc. Intellectual Property Rights The users attention is called to the possibility tha
14、t compliance with this Interim Standard may require use of an invention covered by patent rights. By publication of this Interim Standard, no position is talten with respect to the scope or validity of such patent claims or of any patent rights in connection therewith. One or more parties have notif
15、ied the TIA that they hold patent rights applicable to this Interim Standard. Each patent holder has, however, filed a statement of willingness to grant a license under these rights on reasonable and nondiscriminatory terms and conditions to applicants desiring to obtain such licenses. A copy of the
16、 statement may be obtained from the TIA. Transmission of speech in the PSMN vii Copyright Telecommunications Industry Association Provided by IHS under license with EIALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/29/2007 03:04:22 MDTNo reproduction or networking permitted
17、without license from IHS -,-,- TINEIA IS-781.03.050 viii Copyright Telecommunications Industry Association Provided by IHS under license with EIALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/29/2007 03:04:22 MDTNo reproduction or networking permitted without license from IH
18、S -,-,- TINEIA IS-781.03.050 1 This Geo Mobile Radio-2 Standard is concerned with the transmission planning aspects pertaining to the speech service in the PSMN system. Due to technical and economic factors, there cannot be full compliance with the general characteristics of international telephone
19、connections and circuits recommended by ITU-T. This GMR-2 standard gives guidance as to the precautions, measures and minimum requirements needed for successful intenvorlting of the PSMN with the national and international PSTN. The Recommendation identifies a number of routing and network configura
20、tions. The objective is to reach a quality as close as possible to ITU-T standards in order to safeguard the performance seen by PSTN customers. 2 Refe re nces The following documents contain provisions which, through reference in this text, constitute provisions of the present document. References
21、are either specific (identified by date of publication, edition number, version number, etc.) or non-specific. For a specific reference, subsequent revisions do not apply. For a non-specific reference, subsequent revisions do apply. il GMR-2 O 1.004: “GE0 Mobile Radio interface specification; Abbrev
22、iations and acronyms“ Note: This document is not yet published 21 GSM 03.04 (V4.0.4): “European digital cellular telecommunication system (Phase 2); Signalling requirements relating to routing of calls to mobile subscribers“. 31 GSM 06.12 (V4.0.4): “European digital cellular telecommunications syste
23、m (Phase 2); Comfort noise aspect for full rate speech traffic channels“. 41 GSM 06.32 (V4.3.1): “European digital cellular telecommunications system (Phase 2); Part 6: Voice Activity Detection (VAD) for full rate speech traffic channels“. ETS 300 085 (1990): “Integrated Services Digital Network (IS
24、DN); 3.1 1cHz telephony teleservice; Attachment requirements for handset terminals“. ITU-T Recommendation G. 103 (1 988): “Hypothetical reference connections“. ITU-T Recommendation G. 11 1 (1993): “Loudness ratings (LRs) in an international connections“. ITU-T Recommendation G. 113 (1996): “Transmis
25、sion impairments“. ITU-T Recommendation G. 1 14 (1996): “One-way transmission time“. ITU-T Recommendation G. 121 (1993): “Loudness ratings (LRs) of national systems“. ITU-T Recommendation G. 122 (1993): “Influence of national systems on stability and taller echo in international connections“. 51 61
26、71 SI 91 lo1 i 11 I21 i31 ITU-T Recommendation G. 13 1 (1996): “Control of taller echo“. ITU-T Recommendation G. 165 (1993): “Echo cancellers“. 1 Transmission of speech in the PSMN Copyright Telecommunications Industry Association Provided by IHS under license with EIALicensee=IHS Employees/11111110
27、01, User=Wing, Bernie Not for Resale, 03/29/2007 03:04:22 MDTNo reproduction or networking permitted without license from IHS -,-,- TINEIA IS-781.03.050 i141 i151 i161 i171 i181 i191 i201 i211 i221 i231 i241 i251 i261 i271 i291 i301 i3 i1 i321 i281 i331 i341 i351 3 ITU-T Recommendation G.223 (1984):
28、 “Assumptions for the calculation of noise on hypothetical reference circuits for telephony“. ITU-T Recommendation G.703 (1991): “PhysicaVelectrical characteristics of hierarchical digital interfaces“. ITU-T Recommendation G.711 (1988): “Pulse code modulation (PCM) of voice frequencies“. ITU-T Recom
29、mendations G.712 (1996): “Transmission performance characteristics of pulse code modulation channels“. ITU-T Recommendations M. 1020 (1993): “Characteristics of special quality international leased circuits with special bandwidth conditioning“. ITU-T Recommendations M. 1025 (1993): “Characteristics
30、of special quality international leased circuits with basic bandwidth conditioning“. ITU-T Recommendations M. 1030 (1988): “Characteristics of ordinary quality international leased circuits forming part of private switched telephone networks“. ITU-T Recommendations M. 1040 (1988): “Characteristics o
31、f ordinary quality international leased circuits“. ITU-T Recommendation O. 132 (1988), “Quantizing distortion measuring equipment using a sinusoidal test signal.“ ITU-T Recommendation P. 11 (1993): “Effect of transmission impairments“. ITU-T Recommendation P.340 (1 996): “Transmission characteristic
32、s of hands-free telephones“. ITU-T Recommendation P.35 (1 988): “Handset telephones“ ITU-T Recommendation P.38 (1 993): “Transmission characteristics of operator telephone systems (OTS)“. ITU-T Recommendation P.50 (1993): “Artificial voices“. ITU-T Recommendation P.5 1 (1996), “Artificial mouth.“ IT
33、U-T Recommendation P.57 (1996), “Artificial ears.“ ITU-T Recommendation P.64 (1 997), “Determination of sensitivity/frequency characteristics of local telephone systems.“ ITU-T Recommendation P.76 (1988), “Determination of loudness ratings; fundamental principles.“ ITU-T Recommendation P.79 (1993),
34、“Calculation of loudness ratings for telephone sets.“ ITU-T Recommendation E. 180/Q.35 (1 998): “Technical characteristics of tones for the telephone service“. ITU-T Recommendation Q.55 1 (1 996): “Transmission characteristics of digital exchanges“. IS0 3 - 1973, “Preferred numbers - series of prefe
35、rred numbers.“ Abbreviations In addition to those below, the abbreviations used in this specification are listed in GMR-2 01,004 i. 2 Copyright Telecommunications Industry Association Provided by IHS under license with EIALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/29/200
36、7 03:04:22 MDTNo reproduction or networking permitted without license from IHS -,-,- TINEIA IS-781.03.050 ADC ADPCM AEC DAC DMR DSI EEC EL ERP FDM GSC GTS GWS LSTR MRP OLR PCM POI RLR SLR STMR UPCMI Analogue to Digital Converter Adaptive Differential Pulse Code Modulation Acoustic Echo Control Digit
37、al to Analogue Converter Digital Mobile Radio Digital Speech Interpolation Electric Echo Control Echo Loss Ear Reference Point Frequency Division Multiplex Gateway Station Controller Gateway Transceiver Subsystem Gateway Subsystem Listener Sidetone Rating Mouth Reference Point Overall Loudness Ratin
38、g Pulse Code Modulation Point of Interconnection (with PSTN) Receiver Loudness Rating Send Loudness Rating Sidetone Masking Rating 13-bit Uniform PCM Interface I n t rod uct ion Since the transmission quality and the conversational quality of the PSMN will in general be lower than the quality of the
39、 PSTN connection due to coding distortion, delay, etc, only some transmission aspects can be brought in line with ITU-T Recommendations. It is therefore necessary to improve the overall quality as much as possible by implementing proper routing and network configurations. It should be recognised tha
40、t the transmission plan for the PSMN cannot lead to major changes in the PSTN. However, it is important to use the improvements in the evolving PSTN (e.g. digitisation, introduction of echo cancellers) in an effective way. The transmission requirements are in the first place based on international c
41、onnections. When the quality is sufficient for international connections, it can be assumed that the national connections will have the same or better quality. In order to obtain a sufficient quality in the connection, it is preferable to have digital connectivity between the Gateway Subsystem (GWS)
42、 and the international exchange. The PSMN requirements are based on this assumption. When this situation cannot be provided, a lower quality must temporarily be accepted. This Recommendation consists of two parts: one will deal with network configurations, the other with transmission performance. Th
43、e part about network configurations gives information about the reference connections, on which the transmission plan is based. Furthermore, some guidelines are presented for improvement of the transmission quality in the evolving (digital) PSTN. The part about transmission performance gives mainly
44、characteristics of the transmission between MES acoustic interface (MRP/ERP) and the interface between the PSMN and the PSTN (POI). For transmission aspects where it is impossible to give overall characteristics, it is in some cases necessary to malte recommendations for individual parts of the equi
45、pment. Annex A considers the effects of the type of acoustic interfaces of the MES. Transmission of speech in the PSMN 3 Copyright Telecommunications Industry Association Provided by IHS under license with EIALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/29/2007 03:04:22 MD
46、TNo reproduction or networking permitted without license from IHS -,-,- TINEIA IS-781.03.050 5 Network configurations 5.1 General The basic configuration for the intenvorlting with the PSTN is shown in figure 5.1-1. I l Air Interface Interface point of interface SA bis S-A interconnect Notes to Figu
47、re 5.1-1 NOTE 1: For transmission planning purposes. Interfaces A and A bis are not required. NOTE 2: The speech transcoder is at the GTS. Figure 5.1-1 : Basic Configuration for Interworking with the PSTN 5.2 Model of the PSMN A more detailed model of the PSMN used for the consideration of transmiss
48、ion planning issues for speech is shown in figure 5.2-1. This model represents the main functions required and does not necessarily imply any particular physical realisation. Routing of calls is given in Recommendation GSM 03.04 2. 4 Copyright Telecommunications Industry Association Provided by IHS under license with EIALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/29/2007 03:04:22 MDTNo reproduction or networking permitted without license from IHS -,-,- TINEIA IS-781.03.050 Any acoustic echo control is not specifically shown as it will