1、Rec. ITU-R F.1399-1 1 RECOMMENDATION ITU-R F. 13 99- 1 * * Vocabulary of terms for wireless access (Questions ITU-R 215/8 and ITU-R 140/9) (1999-2001) 1 Introduction This Recommendation consists primarily of those terms and definitions that are considered essential to the understanding and applicati
2、on of the principles of wireless access. However, they are not exclusive to wireless access and are recommended also for application, insofar as they are relevant, to other types of telecommunication systems and services. Included are terms that may already be defined in the Radio Regulations (RR) a
3、nd other ITU-R/ ITU-T Recommendations. However, the definitions given here embrace only the essential concepts and on this basis it is considered that they are not inconsistent with the more specialized definitions that appear in those texts. Where a truncated term is widely used in an understood co
4、ntext, the complete term is quoted following the colloquial form. Some definitions include terms in italic face to indicate that these terms are defined elsewhere in this Recommendation. Technologies in use today for implementing wireless access include cellular systems, cordless phone and cordless
5、telecommunication systems, satellite systems, etc. New technologies and systems such as IMT-2000, wireless broadband ISDN, wireless ATM, HAPS, etc., also form part of wireless access if they satissl the basic criteria of end-user radio connection(s) to core networks (see 4.4 for list of acronyms and
6、 abbreviations). Wireless access may be considered from many perspectives, for example: - Mobility capabilities of the terminal: fixed, nomadic (may be used in different places but the terminal must be stationary while in use), mobile, restricted mobility (e.g. within a single cell), etc. Service su
7、pport capabilities: narrow-band, broadband, multimedia, etc. Type of telecommunication service: conversational, distribution, information retrieval. Connectivity: (which would depend on the switched network that the terminal accesses, e.g. Internet, PSTN, etc.). (See 3 4.4 for list of acronyms and a
8、bbreviations.) - Radio transmission technology: access technique (TDMA, CDMA, etc.), modulation technique (analogue, digital, etc.), duplex technique (FDD, TDD, etc.), etc. (See 3 4.4 for list of acronyms and abbreviations.) DelivePy mechanism: terrestrial, satellite, etc. - - - - * This Recommendat
9、ion was developed jointly by Radiocommunication Study Groups 8 (Working Party 8A) and 9 (Working Party 9B), and any further revision should be undertaken jointly. This Recommendation should be brought to the attention of Radiocommunication Study Groups4 (Working Party 4A), 8 (Working Party 8A) and C
10、oordination Committee for Vocabulary (CCV). * 111 2 Rec. ITU-R F.1399-1 Of particular interest are the mobility characteristics of wireless access systems; thus this Recom- mendation provides definitions of the terms “fixed, “mobile” and “nomadic” wireless access. The purpose of this Recommendation
11、is to speci terms and definitions for terrestrial wireless access. 2 Scope The Recommendation specifies definitions for terms primarily focused in the field of terrestrial wireless access systems. Wireless access applications may be provided within the definitions of the radio services FS, MS, FSS a
12、nd MSS contained in the RR. The ITU has deprecated the use of the term “loop” (see References below: CCITT Blue Book, Vol. I, Fascicle 1.3, 1988); for this reason, and more so because this term does not make any sense with radio technologies, the use of the terms that include loop are deprecated. Th
13、ese include wireless local loop, radio local loop, and wireless access local loop. It should be noted that in many cases systems may be able to support a mixture of users (i.e. fixed, mobile and nomadic) and possibly with restrictions on the type of mobility. It is not practical to define terms for
14、each possible combination, but those above should suffice to refer to the primary characteristics of the system. 3 References The following references have been used in the development of the vocabulary of terms for wireless access: - ITU, terms and definitions; abbreviations and acronyms; recommend
15、ations on means of expression (Series B), General Telecommunications Statistics (Series C), CCITT Blue Book, Vol. I, Fascicle 1.3, 1988. - Recommendation ITU-R F.592: - Recommendation ITU-R M. 1224: - ITU-T Recommendation D.OOO: - ITU-T Recommendation E.600: - ITU-T Recommendation G. 100: - - - ITU-
16、T Recommendation I. 1 12: ITU-T Recommendation I. 1 13 : ITU-T Recommendation I. 1 14: - ITU-T Recommendation J. 1 12: Terminology used for radio-relay systems Vocabulary of terms for International Mobile Telecommunications-2000 (IMT-2000) Terms and definitions for the Series-D Recommen- dations Ter
17、ms and definitions of traffic engineering Definitions used in Recommendations on general characteristics of international telephone connections and circuits Vocabulary of terms for ISDNs Vocabulary of terms for broadband aspects of ISDNs Vocabulary of terms for universal personal telecom- munication
18、 Transmission systems for interactive cable television services. 112 Rec. ITU-R F.1399-1 3 4 Recommendations The ITU Radiocommunication Assembly recommends that the terms and definitions for wireless access in this Recommendation be adopted. 4.1 Vocabulary of terms: Main terms 4.1.1 Wireless access
19、F: accs hertzien; accs sansfil S: acceso inalmbrico End-user radio connection(s) to core networks. NOTE 1 - Core networks include, for example, PSTN, ISDN, PLMN, PSDN, internet, WANLAN, CATV, etc. (See fj 4.4 for list of acronyms and abbreviations.) NOTE 2 - The end-user may be a single user or a us
20、er accessing the services on behalf of multiple users. - 4.1.2 Fixed wireless access (FWA) F: accs hertzienfie (AHF) S: acceso inalmbricofijo (FWA) Wireless access application in which the location of the end-user termination and the network access point to be connected to the end-user are fixed. 4.
21、1.3 Mobile wireless access (MWA) F: accs hertzien mobile (AHM) S: acceso inalmbrico mvil (MWA) Wireless access application in which the location of the end-user termination is mobile. 4.1.4 Nomadic wireless access (NWA) F: S: acceso inalmbrico nmada WA) Wireless access application in which the locat
22、ion of the end-user termination may be in different places but it must be stationary while in use. accs hertzien transportable ou nomade (AHN) 4.2 Vocabulary of terms: General terms 4.2.1 Backhaul communication F: liaison de raccordement S: Transport of aggregate communication signals from base stat
23、ions to the core network. comunicacin de enlace de retroceso 4.2.2 Base station F: station de base S: estacin de base See central station. 113 4 Rec. ITU-R F.1399-1 4.2.3 Broadband wireless access (BWA) F: accs hertzien large bande (AHLB) S: acceso inalmbrico de banda ancha (B WA) Wireless access in
24、 which the connection(s) capabilities are higher than the primary rate. 4.2.4 Central station F: station centrale S: estacin central The common name for all the radio equipment located at one and the same place used for serving one or several cells. NOTE 1 - Also known as hub station, and also as ba
25、se station, even though RR No. 1.7 1 defines base station more restrictively as “a land station in the land mobile service”. 4.2.5 Customer premises equipmenthetwork F: quipementhseau des locaux dabonn S: The equipmenthetwork administered by the user. NOTE 1 - Based on ITU-T Recommendation H.3 1 O.
26、equipohed en las instalaciones del cliente 4.2.6 Distribution system F: systme de distribution S: sistema de distribucin System for unidirectional delivery (transmission) of services to end-users. NOTE 1 - This is strictly not wireless access as such, for the latter requires an additional return (re
27、verse) or interaction channel to be included. Such distribution systems include LMDS, but it should be noted that some systems labelled distribution systems are in fact MWS systems and should be so referenced. 4.2.7 Dynamically variable bandwidth F: S: A capability of a system to be able to change t
28、he bandwidth of the information payload capacity of a communication channel available to a user for services according to negotiated user requirements. NOTE 1 - This is also known as bandwidth on demand. largeur de bande dynamiquement variable anchura de banda dinmicamente variable 4.2.8 End-user F:
29、 utilisateurfinal S: usuario final A human being, organization, or telecommunications system that accesses the network in order to communicate via the services provided by the network. (See ITU-T Recommendation J. 112.) 114 Rec. ITU-R F.1399-1 5 4.2.9 End-user connection point F: point de connexion
30、dutilisateurfinal S: Point at which the end-user obtains the communications service (see Fig. 1). punto de conexin de usuario final 4.2.10 End-user termination, end-user radio termination F: terminaison radiolectrique dutilisateur final S: The end-user radio equipment antenna (see Fig. 1). terminaci
31、n de usuario final; terminacin radioelctrica de usuario final FIGURE 1 IUustration of terms rtemr End-user radio , End-user connection point FWA radio station 1399-0 1 4.2.11 High altitude platform station (HAPS) F: station place sur une plate-forme haute altitude (SPHA) S: A station located on an o
32、bject at an altitude of 20 to 50 km and at a specified nominal, fixed point relative to the Earth (see Note 1). (See RR No. 1.66A.) NOTE 1 - Systems using HAPS which consist of a HAPS and ground stations located at the end-user termination provide wireless access serving as links for various communi
33、cations. The communication mode of a system using HAPS is, for the time being, limited to FWA applications on account of technical reasons at the ground station equipment. However, nomadic or mobile wireless access applications are also expected in the future. estacin en plataforma a gran altitud (H
34、APS) 4.2.12 Hub station F: station pivot S: estacin central See central station. 4.2.13 Internet protocol F: protocole Internet S: protocolo Internet Networking protocol defined by IETF standards. 115 6 Rec. ITU-R F.1399-1 4.2.14 Multimedia wireless system (MWS) F: systme hertzien rnultimdia S: sist
35、ema inalmbrico multimedios A wireless system which supports information exchange of more than one type, such as text, graphics, voice, sound, image, data and video. 4.2.15 Multipoint systems F: systmes multipoint S: sistemas multipunto A generic term for P-MP, MP-MP and vanationshybrids of these. 4.
36、2.16 Narrow-band wireless access - F: accs hertzien bande troite S: Wireless access in which the maximum usable end-user bit rate is up to and including 64 kbits. NOTE 1 - The access is tpically digital but could encompass equivalent analogue access. acceso inalmbrico de banda estrecha 4.2.17 Point-
37、to-multipoint system F: systme point multipoint S: sistema punto a multipunto A system that establishes connections between a single specified point and more than one other specified points. NOTE 1 - It should be noted that wireless access systems commonly feature air-side concen-ation in order to p
38、reserve valuable spectrum resources, although not necessarily so (as, for example, in some lower density, rural systems). Generally point-to-multipoint systems offer FWA, hence the use of the term “fixed wireless access” defined above to distinguish such point-to-multipoint systems fi-om mobile or n
39、omadic wireless access systems. 4.2.18 Point-to-point system F: systme point point S: sistema punto a punto A system that establishes a connection between two end points only. NOTE 1 - These systems may be cascaded geographically, including in the form of a ring. 4.2.19 Primary rate F: dbit primaire
40、 S: velocidad primaria The transmission bit rate of 1544 kbits (Tl) or 2048 kbit/s (El). . 116 Rec. ITU-R F.1399-1 7 4.2.20 Quality of service F: qualit de service S: calidad del servicio The collective effect of service pedormance which determines the degree of satisfaction of a user of the service
41、. NOTE 1 - The quality of service is characterized by the combined aspects of service support performance, service operability performance, serveability performance, service security performance and other factors specific to each service. NOTE 2 - The term “quality of service” is not used to express
42、 a degree of excellence in a comparative sense nor is it used in a quantitative sense for technical evaluations. in these cases a qualiwng adjective (modifier) should be used. NOTE 3 - ITU-T Recommendation E.800 (94). 4.2.21 Repeater; repeater station F: rpteur; station rptrice S: repetidor; estacin
43、 repetidora A station used to extend geographical range or coverage ability incorporating both receive and transmit functions, which may or may not feature frequency translation. 4.2.22 Station F: station radiolectrique S: estacin radioelctrica The common name for all the radio equipment at one and
44、the same place (see Fig. 4). NOTE 1 - The term “station” may refer to any end-user radio equipment or network radio equipment. 4.2.23 Teledensity; access density F: S: teledensidad; densidad de accesos Number of end-user terminations per square kilometre. densit daccs; densit de terminaisons 4.2.24
45、Teledensity; terminal density F: densit de terminaux S: teledensidad; densidad de terminales Number of end-user terminals per square kilometre. 4.2.25 Teledensity; telephone density F: tldensit; densit tlphonique S: penetracin; densidad telefnica; teledensidad The number of telephones (or lines) rel
46、ative to a characteristic element such as number of inhabitants (telephones per 1 O0 population), number of households, business premises, area units, income groups, etc., used generally for planning purposes. (See TERMITE - TERMInology of TElecommunications - IT, Senal number: MT1886, Modified: Jun
47、e 1997.) 117 8 Rec. ITU-R F.1399-1 4.2.26 Terminal station F: station terminal S: estacin terminal The user or end-user station. NOTE 1 - Also known as remote station, out station, subscriber station, subscriber radio terminal and remote terminal. 4.2.27 Termination; radio termination F: terminaison
48、 radiolectrique S: terminacin; terminacin radioelctrica The physical location of the radio equipment antenna. 4.2.28 Total station density - F: densit totale de stations radiolectriques S: The total number of stations per square kilometre in a service area. densidad total de estaciones radioelctrica
49、s 4.2.29 Total transmitter density F: densit totale dmetteurs S: densidad total de transmisores The total number of transmitters per square kilometre in a service area. 4.2.30 User F: utilisateur S: usuario Any entity external to the network which utilizes connections through the network for communi- cation. (See ITU-T Recommendation E.600.) 4.2.31 Virtual point-to-point connection F: S: Providing a point-to-point connection to a subscriber using a point-to-multipoint system. connexion virt
