1、ETSI EN 301 055 VI .4.1 (2001-02) European Standard (Telecommunications series) Fixed Radio Systems: Point-to-multipoint equipment; Direct Sequence Code Division Multiple Access (DS-CDMA); Point-to-multipoint digital radio systems in frequency bands in the range 1 GHz to 3 GHz COPYRIGHT European Tel
2、ecommunications Standards InstituteLicensed by Information Handling Services2 ETSI EN 301 055 V1.4.1 (2001-02) Tt- Reference REN/TM-04111-29 Keywords CDMA, DRRS, multipoint, radio, RLL, transmission ETSI 650 Route des Lucioles F-O6921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 O0 Fax: +33
3、4 93 65 47 16 Siret No 348 623 562 00017 - NAF 742 C Association but non lucratif enregistre la Sous-prfecture de Grasse (06) No 7803/88 Important notice Individual copies of the present document can be downloaded from: present document may be made available in more than one electronic version or in
4、 print. In any case of existing perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF). In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive within ETSI Secretariat. U
5、sers of the present document should be aware that the document may be subject to revision or change of status. Information on the current status of this and other ETSI documents is available at :/.$./$/ If you find errors in the present document, send your comment to: editor etsi.fr Copyright Notifi
6、cation No part may be reproduced except as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media. 8 European Telecommunications Standards Institute 2001. All rights reserved. ETSI COPYRIGHT European Telecommunications Standards InstituteLic
7、ensed by Information Handling Services3 ETSI EN 301 055 V1.4.1 (2001-02) Contents Intellectual Property Rights 5 Foreword 5 Introduction 5 1 1.1 1.2 1.3 1.4 2 3 3.1 3.2 3.3 4 4.1 4.2 4.2.1 4.2.2 4.2.3 4.2.4 4.2.5 5 5.1 5.2 5.2.1 5.3 5.3.1 5.3.2 5.3.2.1 5.3.2.2 5.3.3 5.3.4 5.4 5.4.1 5.4.2 5.4.3 5.4.3
8、.1 5.4.3.2 5.4.3.3 5.4.4 5.4.4.1 5.4.4.2 5.5 5.5.1 5.5.2 Scope 7 Frequencies . 7 Access method 7 Compatibility 7 Applications 7 References 7 Definitions, symbols and abbreviations . 9 Definitions 9 Symbols 9 Abbreviations 9 General system architecture 10 Transmission error performance . 11 Round tri
9、p delay 11 Sub-system types . 10 System characteristics 11 Transparency . 11 TMN interface . 11 Synchronization . 11 Frequency bands 12 Channel arrangement . 12 System loading 12 Transmitter power range 13 Radio characteristics . 12 Transmitter characteristics . 13 Spectrum masks . 13 Spectrum densi
10、ty mask . 13 Transmitter spurious emissions . 15 Dynamic range . 15 BER performance 16 Discrete CW components exceeding the spectrum mask limit (all stations) 14 RF tolerance 15 Receiver characteristics . 15 Receiver spurious emissions . 16 Single signal performance . 16 Loaded BER performance . 16
11、Maximum system loading . 16 Interference sensitivity . 21 Co-channel interference sensitivity 21 Adjacent channel interference sensitivity . 21 Antenna port characteristics . 22 RF interface . 22 Return loss . 22 6 7 Power supply. EMC. environmental and mechanical characteristics 23 7.1 Power supply
12、 . 23 7.2.1 Equipment within weather protected locations 23 7.2.2 Equipment for non-weather protected locations 23 Types of subscriber equipment and network exchange interface 22 7.2 Environmental conditions 23 ETSI COPYRIGHT European Telecommunications Standards InstituteLicensed by Information Han
13、dling Services4 ETSI EN 301 055 V1.4.1 (2001-02) 7.3 History . 24 Electromagnetic Compatibility (EMC) conditions 23 ETSI COPYRIGHT European Telecommunications Standards InstituteLicensed by Information Handling Services5 ETSI EN 301 055 V1.4.1 (2001-02) Intellectual Property Rights IPRs essential or
14、 potentially essential to the present document may have been declared to ETSI. The information pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found in ETSI SR O00 314: “Intellectual Property Rights (IPRs); Essential, or potentially Esse
15、ntial, IPRs notified to ETSI in respect of ETSI standards“, which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server ClattD:/www.etsP.c/iDr. Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
16、can be given as to the existence of other IPRs not referenced in ETSI SR O00 314 (or the updates on the ETSI Web server) which are, or may be, or may become, essential to the present document. Foreword This European Standard (Telecommunications series) has been produced by ETSI Technical Committee T
17、ransmission and Multiplexing (TM). National transposition dates Date of adoption of this EN Date of latest announcement of this EN (doa): Date of latest publication of new National Standard or endorsement of this EN (dop/e): Date of withdrawal of any conflicting National Standard (dow): 16 February
18、2001 31 May 2001 30 November 2001 30 November 2001 Introductio n The main field of application of Point-to-Multipoint (P-MP) systems is to provide access to both public and private networks (PSTN, PDN, etc.). By means of P-MP systems the network service area may be extended to cover both distant and
19、 scattered subscriber locations; and the systems may be applied to build new access networks covering both urban and rural areas. Subscribers are offered the full range of services by the particular public or private network. Subscribers have access to these services by means of the various standard
20、ized user network interfaces (2-wire loop, new data services). P-MP systems provide standard network interfaces and transparently connect subscribers to the appropriate network node. These systems allow a service to be connected to a number of subscribers ranging ftom a few to several thousand, and
21、over a wide range of distances. Point-to-Multipoint systems are generally configured as pre-assigned systems or as Demand Assigned Multiple Access (DAMA) radio systems. The essential features of a typical P-MP DAMA radio system are: - - concentration: efficient use of the radio spectrum; - transpare
22、ncy. Radio is often the ideal way of obtaining communications at low cost and almost independent of distance, and difficult topography. Moreover, a small number of sites is required for these installations, thus facilitating rapid implementation and minimizing maintenance requirements of the systems
23、. ETSI COPYRIGHT European Telecommunications Standards InstituteLicensed by Information Handling Services6 ETSI EN 301 055 V1.4.1 (2001-02) Concentration means that m subscribers can share n radio channels (m being larger than n), allowing better use to be made of the available frequency spectrum an
24、d at a lower equipment cost. The term “multi-access means that every subscriber has access to every channel (instead of a fixed assignment as in most multiplex systems). When a call is initiated an available channel is allocated to it. When the call is terminated, the channel is released for another
25、 call. Concentration requires the use of distributed intelligent control, which in turn allows many other operation and maintenance functions to be added. Transparency means that the exchange and the subscriber equipment communicate with each other without being aware of the radio link. ETSI COPYRIG
26、HT European Telecommunications Standards InstituteLicensed by Information Handling Services7 ETSI EN 301 055 V1.4.1 (2001-02) 1 Scope 1 .I Appl cat ions The present document covers the following typical Point-to-Multipoint (P-MP) applications: 1.2 voice; fax; voiceband data; telex; data up to 64 kbi
27、ds; Integrated Services Digital Network (ISDN). Frequencies The present document covers fixed services bands at 1,5 GHz, 2,2 GHz, 2,4 GHz and 2,6 GHz. The frequency plans for the 1,5 GHz, 2,2 GHz and 2,6 GHz bands are given in CEPTERC Report T/R 13-01 7 and ITU-R Recommendation F.1098-1 20. For the
28、2,4 GHz band, the ITU-R Recommendation F.701-1 8 is applicable. 1.3 Access method The present document covers Direct Sequence Code Division Multiple Access (DS-CDMA) systems. 1.4 Com pati bility There is no requirement to operate Central Station (CS) equipment ftom one manufacturer with Terminal (TS
29、) or Repeater Station (RS) equipment from another manufacturer. 2 References The following documents contain provisions which, through reference in this text, constitute provisions of the present documen t. References are either specific (identified by date of publication, edition number, version nu
30、mber, etc.) or non-specific. For a specific reference, subsequent revisions do not apply. For a non-specific reference, the latest version applies. u1 ETSI ETS 300 012: “Integrated Services Digital Network (ISDN); Basic user-network interface Layer 1 specification and test principles“. ITU-T Recomme
31、ndation G.703: “Physical/electrical characteristics of hierarchical digital interfaces“. 121 131 ITU-T Recommendation Q.553: “Transmission characteristics at 4-wire analogue interfaces of digital exchanges“. ITU-T Recommendation Q.552: “Transmission characteristics at 2-wire analogue interfaces of d
32、igital exchanges“. 141 ETSI COPYRIGHT European Telecommunications Standards InstituteLicensed by Information Handling Services8 ETSI EN 301 055 V1.4.1 (2001-02) 151 191 u31 u41 u71 u91 ITU-T Recommendation G.821: “Error performance of an international digital connection operating at a bit rate below
33、 the primary rate and forming part of an integrated services digital network“. ITU-T Recommendation R.20: “Telegraph modem for subscriber lines“. CEPTERC Report T/R 13-01: “Preferred channel arrangements for fixed services in the range 1-3 GHz“. ITU-R Recommendation F.701-1: “Radio-frequency channel
34、 arrangements for analogue and digital point-to-multipoint radio systems operating in fi-equency bands in the range 1.350 to 2.690 GHz (1.5, 1.8, 2.0, 2.4 and 2.6 GHz)“. ETSI ETS 300 019 (all parts): “Equipment Engineering FE); Environmental conditions and environmental tests for telecommunications
35、equipment“. ETSI ETS 300 132 (all parts): “Equipment Engineering (EE); Power supply interface at the input to telecommunications equipment“. ITU-T Recommendation G.773: “Protocol suites for Q-interfaces for management of transmission systems“. ETSI EN 300 385 (V1.2.1): “Electromagnetic compatibility
36、 and Radio spectrum Matters (ERM); ElectroMagnetic Compatibility (EMC) standard for fixed radio links and ancillary equipment“. ITU-T Recommendation G.7 11 : “Pulse code modulation (PCM) of voice frequencies“. ITU-T Recommendation G.726: “40, 32,24, 16 kbids Adaptive Differential Pulse Code Modulati
37、on ( ADPCM) “ . ITU-T Recommendation G.728: “Coding of speech at 16 kbids using low-delay code excited linear prediction“. ITU-T Recommendation G.729: “C source code and test vectors for implementation verification of the G.729 8 kbids CS-ACELP speech coder“. ITU-R Recommendation F.697-1: “Error per
38、formance and availability objectives for the local- grade portion at each end of an ISDN connection at a bit rate below the primary rate utilizing digital radio-relay systems“. ETSI EN 300 324 (all parts): “V interface at the digital Local Exchange (LE); V5.1 interface for the support of Access Netw
39、ork (AN)“. ETSI EN 300 347 (all parts): “V interfaces at the digital Local Exchange (LE); V5.2 interface for the support of Access Network (AN)“. ITU-R Recommendation F. 1098-1: “Radio-frequency channel arrangements for radio-relay systems in the 1 900 to 2 300 MHz band“. CEPTERC Recommendation 74-0
40、1 : “Spurious Emissions“. ITU-T Recommendation G.131: “Control of talker echo“. ETSI COPYRIGHT European Telecommunications Standards InstituteLicensed by Information Handling Services9 ETSI EN 301 055 V1.4.1 (2001-02) 3 3.1 Definitions, symbols and abbreviations Def i n it ions For the purposes of t
41、he present document, the following terms and definitions apply: chip: unit of modulation used in direct sequence spread spectrum modulation. chip rate: number of chips per second measured in Mchipds. chip sequence: sequence of chips with defined length and chip polarities. direct sequence spread spe
42、ctrum modulation: form of modulation where a combination of data to be transmitted and a fixed code sequence (chip sequence) is used to directly modulate a carrier, e.g. by phase shift keying. single DS-CDMA signal: single traffic channel and any associated signalling/synchronization overhead. syste
43、m loading: system loading is the number of simultaneous traffic channels at 64 kbit/s in a given radio channel. maximum system loading: maximum system loading is the number of simultaneous 64 kbit/s traffic channels in a given radio channel for the class of operation declared by manufacturers. round
44、 trip delay: sum of the delays between points A to B and B to A in figure 1 including any repeaters as appropriate. 3.2 Symbols For the purposes of the present document, the following symbols apply: A B GHZ GigaHertz kbit/s kilobit per second Mchip/s Mega chip per second MHZ MegaHertz PPm parts per
45、million interface from local switch to P-MP system interface from P-MP system to customer terminal equipment 3.3 Abbreviations For the purposes of the present document, the following abbreviations apply: BER BW CCS CRS cs CSmin DAMA MOS PDN P-MP PRBS PSTN QDU RF RS RSL DS-CDMA Bit Error Rate Bandwid
46、th Central Controller Station Central Radio Station Central Station minimum practical Channel Separation (for a given radio-frequency channel arrangement) Demand Assigned Multiple Access Direct Sequence Code Division Multiple Access Mean Opinion Score Private Data Network Point-to-Multipoint Pseudo
47、Random Binary Sequence Public Switched Telephone Network Quantization Distortion Unit Radio Frequency Repeater Station Receive Signal Level ETSI COPYRIGHT European Telecommunications Standards InstituteLicensed by Information Handling Services10 ETSI EN 301 055 V1.4.1 (2001-02) TE Terminal Equipment
48、 TMN Telecommunications Management Network TS Terminal Station 4 A system General system architecture could consist of physical sub-systems as follows (see figure 1): Local Switch 1 I- I I I I NOTE: Refer to clause 3.3 for definitions of abbreviations used in this figure. Figure 1 : General system a
49、rchitecture 4.1 Sub-system types CS: Central Station which can be subdivided into two units: - the Central Controller Station (CCS) also called the exchange unit which is the interface to the local switch; - the Central Radio Station (CRS) also called the radio unit which is the central baseband / radio transceiver equipmen t. TS: Terminal Station (outstations with subscriber interfaces). RS: A: B: Repeater Station (radio repeater outstations with or without subscriber interfaces). Point of connection to local switch. Point(s) of connection for subscrib
