1、3404583 0068587 534 ER 069 February 1993 Source: ETSI TC-RES Reference: DTR/RES-1003 UDC: 621.396 Key words: HIPERLAN, services, facilities, LAN, RUN, CLAN Radio Equipment and Systems (REiS); High Performance Radio Local Area Network (HIPERLAN) Services and facilities ETSI European Telecommunication
2、s Standards Institute ETSI Secretariat Postal address: 06921 Sophia Antipolis Cedex - FRANCE Office address: Route des Lucioles - Sophia Antipolis - Valbonno - FRANCE Tel.: +33 92 94 42 O0 - Fax: +33 93 65 47 16 - Tlx.: 470 040 F European Telecommunications Standards Institute 1 993. All rights rese
3、rved. No part may be reproduced except as authorised by written permission. The copyright and the foregoing restriction on reproduction extend to all media in which the inforrriation may be embodied. COPYRIGHT European Telecommunications Standards InstituteLicensed by Information Handling Services34
4、04583 0068588 470 Page 2 ETR 069:1993 Whilst every care has been taken in the preparation and publication of this document, errors in content, typographical or otherwise, may occur. If you have comments concerning its accuracy, please write to “ETSI Standards Management Dept.“ at the address shown o
5、n the title page. COPYRIGHT European Telecommunications Standards InstituteLicensed by Information Handling ServicesW 3404583 0068589 307 II Page 3 ETR 069:1993 Contents . * Foreword . 5 1 Scope . 7 2 Introduction . 7 What is HIPERLAN? 7 2.2 Applications 8 2.2.1 Office automation 8 2.2.2 Financial s
6、ervices 8 2.2.3 Medical and hospital systems 8 2.2.4 Education and training . 8 2.2.5 Industrial automation . 8 2.2.6 Ad-hoc networking 9 2.1 3 Definitions and abbreviations 9 3.1 Definitions . 9 3.2 Abbreviations 12 4 General requirements . 12 Distributed processing systems. wired LAN extensions an
7、d aliternatives . 12 Mixed asynchronous and time-bounded services . 13 Multiple networks and criteria for sharing 13 4.4 Mobility 13 4.5 Security 13 Power. size and costs . 13 4.7 Interoperability . 14 4.8 Safety 14 4.1 4.2 4.3 4.6 5 Operating requirements 14 5.2 Latency 14 5.3 Delay., 14 5.4 Delay
8、variance . 14 Systems throughput and systems capacity 15 5.6 Range . 15 5.7 Interference . 15 5.7.1 Non-HIPERLAN interference 15 5.7.2 HIPERLAN interference . 15 5.8 Error rate 15 Summary of HIPERLAN parameters . 16 5.1 Data rate . 14 5.5 5.9 6 HIPEWAN reference model 16 6.1 Basic principles 16 6.1.
9、1 Introduction 16 6.1.2 Shared communications medium . 17 6.1.3 Intersecting media . 18 6.1.4 Resource management . 18 6.1.5 Mobility . 18 6.2 Reference model 18 6.2.1 General 18 6.2.2 Layer functionality . 19 6.2.2.1 LLC type 2 enhancements . 19 6.2.2.2 MAC sub-layer . 19 6.2.2.3 Physical layer 19
10、COPYRIGHT European Telecommunications Standards InstituteLicensed by Information Handling Services 3404583 0068590 O29 M Page 4 ETR 069:1993 6.2.3 HIPERLAN management 19 6.2.4 External interfaces . 20 6.3 Interworking . 20 6.3.1 MAC level bridging. 20 6.3.2 Network level interworking 21 7 Services .
11、 21 7.1 Asynchronous services 21 7.2 Time-bounded services 21 8 Facilities . 22 8.1 Operational control 22 Enable/disable HIPERLAN sub-system . 22 8.1.2 Create HIPERLAN . 22 8.2 Configuration control . 22 Enable/disable intra-HIPERLAN forwarding . 22 Enable/disable inter-HIPERLAN forwarding . 22 8.2
12、.3 Enable/disable encryption 23 Change encryption key . 23 Change forward error control . 23 Change power conservation parameters 23 8.3 Reporting., . 23 8.3.1 Show partitions . 23 8.3.2 Show HIPERLANs 23 8.3.3 Show nodes 23 8.3.4 Show node configuration 23 8.3.5 Show node statistics 23 8.1.1 8.1.3
13、8.1.4 8.2.1 8.2.2 8.2.4 8.2.5 8.2.6 Join a given HIPERLAN . 22 Leave a given HIPERLAN . 22 9 Conformance considerations . 23 Annex A (informative): References . 24 History . 25 COPYRIGHT European Telecommunications Standards InstituteLicensed by Information Handling Servicesm 3404583 OOb8593 Tb5 m P
14、age 5 ETR 69:1993 Foreword This ETSI Technical Report (ETR) has been prepared by the Radio Equipment and Systems (RES) Technical Committee (TC) of the European Telecommunications Standards Institute (ETSI). ETRs are informative documents resulting from ETSI studies which are not appropriate for Euro
15、pean Telecommunication Standard (ETS) or Interim European Telecommunication Standard (LETS) status. An ETR may be used to publish material which is either of an informative nature, relating to the use or application of ETSs or I-ETSs, or which is immature and not yet suitable for formal adoption as
16、an ETS or I-ETS. This ETR contains the specification of the services and facilities of Hlgh PErformance Radio Local Area Network (HIPERLAN) systems as well as the operational requirements on which the specification is based. A description of possible applications is also included COPYRIGHT European
17、Telecommunications Standards InstituteLicensed by Information Handling Services3404583 0068592 9TL Page 7 ETR 069:1993 1 Scope The scope of this ETR is the specification of services and facilities of HIPEFILAN (Hlgh PErformance Radio Local Area Network) systems as well as the operational requirement
18、s on which the specification is based, and a description of possible applications. To clarify the services and facilities specification, a HIPERLAN architecture is outlined. This architecture will be! described in detail in a future ETR. This ETR addresses a new subject area: the intersection of rad
19、io systems and information processing systems. HIPERLAN systems are open sub-networks that coriform to Open Systems standards where these are available (e.9. for data communications protocols, systems management and security). HIPERLAN systems will make use of the 5,2 GHz and the 17,l GHz bands allo
20、cated by the CEPT in T/R 22-06, to HIPERLAN systems. The services and facilities specified in this ETR serve as the basis of, and reference for, the technical specification of HIPERLAN. This ETR outlines a number of applications of HIPERLAN based systems. Taken as examples of more general areas of e
21、ndeavour, they cover almost the whole spectrum of business and administrative activity. HIPERLAN is more than a wire substitute. HIPERLAN may, and will, be used as a substitute for wired systems, but will also add a considerable number of new possibilities, features, and versatility to the computing
22、 environment. The ETR considers the operational needs of the applications identified here; which are then used as a basis for deriving the required spectrum parameters. 2 Introduction This Clause examines the context of radio based local area networks, their applications, their relationships to othe
23、r types of networks, and the markets they could serve. 2.1 What is HIPERLAN? HIPERLAN refers to a radio-communications sub-system intended for integration with computer systems. It provides high speed, short distance radio links between compluter systems. Typically, HIPERLAN will be used for local,
24、in-house, and on-premises networking. The demand for radio based local networks is a logical consequence of the rapid growth in personal computing and mobile communications in recent years. Conventional personal computing networks consist of personal computers connected to each other and to more pow
25、erful server systems by means of wired local area networks (LAN4 based on the IS0 8802 family of standards. Such systems are expected to account for a still rising share of the personal computing market and they account for the majority of new computer systems and applications. The ubiquity of these
26、 systems has resulted in personal computer use becoming a part of the daily routine of a wide variety of business and professional occupations. Since many people use personal computers in their daily routine, the demaiid for untethered access to computer systems, whether located nearby or remotely,
27、is rising. The emergence of mobile telephony has freed many businesses and professionals from the limitations of fixed location telephones: voice access to customers, suppliers and peers anywhere and at any time is rapidly becoming commonplace. The introduction of advanced mobile telephony systems w
28、ith data capabilities promises mobile users access to remote computer systems from cars, trains, public facilities, etc. The data rates supported by these mobile services and the cost of using them limit them to relatively low rate, low volume, intermittent use. There is a strong parallel demand for
29、 untethered access to systems locatied on premises with the same level of performance as offered by wired local area networks. Rather than be bound to a Previous page is blank COPYRIGHT European Telecommunications Standards InstituteLicensed by Information Handling Services9 3404583 0068593 838 9 Pa
30、ge 8 ETR 069: 1993 desktop personal computer, users want to be able to take their lightweight portable computers with them wherever they go, throughout their organisations premises, while maintaining the ability to interact with, and make use of, other local area networks. Similarly, the possibility
31、 of moving desktop systems without the need for rewiring offices is a significant advantage in todays fast Changing working environments. The ability to accommodate change is a major factor behind the drive towards untethered computer access. Another factor to be considered is the rapid internationa
32、lisation of businesses and other organisations, requiring frequent travel and temporary secondments. Again, the people concerned want to be able to take their computers with them and operate them on premises other than their own. HIPERLANs, radio networks based on the work of ETSI in this field, add
33、ress on-premises, in addition to off-premises, networking demands by providing a radio based alternative in the case where wired LANs cannot be used, as well as providing the ability to extend wired networks with radio links. 2.2 Applications The applications of HIPERLANs cover a wide range of busin
34、ess, administrative, and professional uses. The following list provides examples. As HIPERLAN technology becomes widely available other applications will emerge which will further increase HIPERLANs utilisation. 2.2.1 Office automation General office automation covers a wide range of administrative
35、applications. Changes in office organisation such as emphasis on work groups lead to demands for flexibility in the location of professional and support staff. In addition, the increased complexity of administrative and management tasks leads to frequent ad-hoc meetings at which people wish to make
36、use of their computers. 2.2.2 Financial services The financial industry is moving towards a more flexible and fast service specialised to meet individual needs. Untethered computing will provide for the realisation of financial products like flexible cash machines, home-banking directly with the use
37、rs equipment and other ad-hoc services. 2.2.3 Medical and hospital systems In all developed countries medical care and hospitalisation are becoming more expensive. These extra costs are caused in part by the complexity of medical systems, patient care and medication. The efficiency of medical staff
38、can be improved by giving them on the spot, real-time access, wherever they are, to patient data, x-ray images, video recordings and medical records. 2.2.4 Education and training Computers and networks in particular are being used increasingly in education and training, both in schools and colleges,
39、 and in the workplace. HIPERLAN will greatly enhance the services that can be offered as well as the flexibility of their provision. These include the distribution of teaching material, interaction with teachers, sharing of assignments and research results, as well as printing and other services ava
40、ilable on wired LANs. Wired systems cannot provide the flexibility needed in educational institutions. 2.2.5 Industrial automation . Industrial systems have been using computers for many years; in many cases the systems concerned were centralised where a few computers controlling a large number of m
41、achine tools, conveyor systems, etc. With the increasing use of microprocessor teChnOlOgy and with the trend towards flexible production systems, more computing power will be decentralised. This will be paralleled by an increased need for ad-hoc networking between production floor systems. Radio COP
42、YRIGHT European Telecommunications Standards InstituteLicensed by Information Handling Services3404583 0068594 774 D Page 9 ETR 069:1993 . based networks are ideal for these applications, especially taking into account the ability of HIPERLAN to service moving objects. 2.2.6 Ad-hoc networking A very
43、 important class of HIPERLAN applications are those in which no fixed structure exists. Rather, groups of mobile users (e.g. using laptop computers) may form, dissolve and reform so- called ad-hoc networks as required. For example a number of people may meet at an arbitrary location and decide to ne
44、twork their portable computers temporarily. Suchi networks may occur in education and training environments where computers are shared between many different tasks, and also in collaborative environments such as meetings, project groups ancl team problem solving. 3 Definitions and abbreviations 3.1
45、Definitions For the purposes of this ETR, the following definitions apply: Adhoc network: applications of HIPERLAN in which no fixed structures exist. Angular speed: the net angular speed of a node requiring HIPERLAN services whilst in motion. Asynchronous service: this service is provided by HIPERL
46、AN to support asynchronous traffic between HIPERLAN nodes and traffic between HIPERLAN and some other network. Asynchronous traffic: data traffic that characteristically has a statistical arrival and delay distribution. This typifies most LAN data traffic. Channel: an instance of medium use that can
47、 coexist with other instanciis of medium use, with each providing service to a separate set of HIPERLAN nodes. Co-existence: see HIPERLAN sharing. Co-location tolerance: the minimum distance between two HIPERLAN nodes that are guaranteed to operate. Connection set: a sub-set of HIPERLAN nodes (withi
48、n one or more HIPERLANs) that are in direct radio communication range of each other. Data confidentiality: provisions for the protection of transmitted datia from observation by unauthorised stations or other monitoring means. One measure for doing that is to implement encryption. Data rate: net use
49、r data rate at the MAC/DLC layer interface. This is an average rate over a multi- symbol burst of activity, and not an average over a time-period including several bursts. Data Link Control (DLC): layer 2 of the ISO/OSI reference model. Encryption: a means of obtaining data confidentiality. See also: Data confidentiality. Error rate: in HIPERLAN, several error rates are defined: - - - Mac Protocol Data Unit (MPDU) detected error rate, which defines the fraction of protocol data units at the MAC layer that have errors that can be detected; MPDU undetected error rate, which defines
