1、REPORT W 3404583 0336622 839 W - ETR 133 July 1994 Source: ETSI TC-RES Reference: DTR/RES-10-05 UDC: 621.396 Key words: HIPERLAN Radio Equipment and Systems (RES); Hlgh PErformance Radio Local Area Network (HIPERLAN); System definition ETS I European Telecommunications Standards Institute ETSI Secre
2、tariat Postal address: 06921 Sophia Antipolis Cedex - FRANCE Office address: Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE Tel.: + 33 92 94 42 O0 - Fax: + 33 93 65 47 16 European Telecommunications Standards Institute 1 994. All rights reserved. No part may be reproduced except as author
3、ised by written permission. The copyright and the foregoing restriction on reproduction extend to all media in which the information may be embodied. Page 2 ETR 133:1994 Whilst every care has been taken in the preparation and publication of this document, errors in content, typographical or otherwis
4、e, may occur. If you have comments concerning its accuracy, please write to “ETSI Editing and Standards Approval Dept.“ at the address shown on the title page, _ . - m 3404583 0336624 603 m Contents Page 3 ETR 133: 1994 Foreword . 5 Introduction 5 1 2 3 4 5 6 7 8 Scope . 7 References. 7 Definitions.
5、 symbols and abbreviations . 7 3.1 Definitions . 7 3.2 Abbreviations 8 HIPERLAN architecture overview . 9 4.1 General . 9 System Co-ordination Function (SCF) . 12 4.2.3 HIPERLAN addressing 14 4.2.4 Forwarding function 14 Physical layer (PHY) . 14 4.5 Service interfaces . 14 4.2 MAC sub-layer functio
6、ns . 11 4.2.1 4.2.2 Data Transfer Services (DTS) function 13 4.3 4.4 4.6 HIPERLAN management 14 Channel Access Mechanism (CAM) . 14 System Co-ordination Function (SCF) . 14 5.1 SCF summary 15 HIPERLAN creation and membership functions . 16 5.3 Security management . 17 5.4 Forwarding management. 17 5
7、.5 Statistics 17 5.6 Multi-Channel Resource Sharing (MCRS) . 17 5.7 Power conservation functions 18 5.7.1 Power Conservation Mode (PCM) declaration 18 5.7.2 Power Conservation Broadcasts (PCB) 18 5.2 HIPERLAN addressing 19 6.1 Addressing definitions: 19 6.1.1 HIPERLAN ID (HID) 19 6.1.2 Node ID (NID)
8、 . 20 6.1.3 HIPERLAN address 20 6.1.4 Addressing structure . 20 6.2 Frame reception . 20 6.3 HIPERLAN HID conflict detection and resolution . 20 Data Transfer Services (DTS) 21 7.1 Overview 21 7.2 Quality of Service (00s) parameters . 21 7.3 Priority assignment . 22 Queue order priority . 22 Channel
9、 access priority 22 Power conservation support 22 7.5 Data encryption . 23 7.3.1 7.3.2 7.4 Forwarding 23 8.1 General . 23 8.2 Forwarding requirements . -23 8.3 HIPERLAN forwarding methodology -24 8.4 HIPERLAN forwarding services . 25 8.5 Loop control . 25 8.6 Broadcast forwarding 25 Transmit power c
10、ontrol . -25 8.7 Annex A (informative): HIPERLAN management 26 A . 1 Overview . 26 A.2 Operational control object . 26 A.3 Configuration control . 26 A.3.1 Forwarding object -26 A.3.2 Encryption object . -26 Power conservation object . 26 A.3.3 A.4 Reporting object 27 . History . 28 Page 5 ETR 133:1
11、994 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 European Telecommu
12、nication 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 of or application of ETSs or I-ETSs, or which is immature and not yet suitable for formal adoption as an ETS or L
13、ETS. Introduction Hlgh PErformance Radio Local Area Network (HIPERLAN) is a short range radio-communications sub-system intended for use with computer systems. HIPERLAN will offer users at least 10 Mbit/s service data rate and support a range of services such as asynchronous LAN and time bounded ser
14、vices. The target size for the physical implementation of the standard is a Personal Computer Memory Card Interface Association (PCMCIA) card. ETR 069 ll provides a description of HIPERLAN, outlines why there is a need for the HIPERLAN standard and provides details of potential applications. This ET
15、R defines the architectural framework within which subsequent protocol definitions will be made and provides the reference description of HIPERLAN sub-system behaviour. This ETR is structured in such a way as to lead the reader through a description of HIPERLAN, its logical components and their inte
16、r-relationships. Clause 5 describes HIPERLAN from a high level perspective, defines the boundaries of HIPERLAN responsibilities, and specifies the assumed external dependencies. The remaining Clauses detail specific aspects of HIPERLAN components and features as required to meet the objectives defin
17、ed. _I H 3404583 0336627 310 Page 7 ETR 133:1994 1 Scope This ETR describes the architecture of the HIPERLAN sub-system and is an expansion of the outline architecture provided in ETR 069 11 I. The HIPERLAN architecture described herein is confined to the lower two Open Systems Interconnection (OSI)
18、 layers. Functions of higher layers are required for operation and inter-working of a complete system and are outside the scope of HIPERLAN. Therefore they are not considered in this ETR. The architecture described in this ETR serves as the basis and reference for the HIPERLAN standard to be defined
19、 in a future European Telecommunication Standard (ETSI. ETR 069 ll, outlines a number of applications of HIPERLAN based systems. They are not considered further in this ETS. 2 References For the purposes of this ETR, the following references apply: . i1 1 i21 i31 41 3 3.1 ETR 069: “Radio Equipment a
20、nd Systems (RES); HIPERLAN Services and facilities“. IS0 7498: “Information processing systems - Basic reference model“. ISOAEC 10039 (1 991 ): “Information technology - Open Systems Interconnection - Local Area Networks - Medium Access Control (MAC) service definition“. IS0 8802-2 (IEEE Std 802.2)
21、(1 989): “Information processing systems - Local area networks - Part 2: Logical link control“. Definitions, symbols and abbreviations Definitions For the purposes of this ETR, the following definitions apply. Ad-hoc network: applications of HIPERLAN in which no fixed infrastructures exist. Asynchro
22、nous service: a service provided by HIPERLAN to support asynchronous traffic between HIPERLAN nodes. Asynchronous traffic: data traffic that characteristically has a statistical arrival and delay distribution. This typifies most LAN data traffic. Attached sub-network: a sub-network to which a HIPERL
23、AN sub-network is attached for the purpose of communication to either an end system or another sub-network. Channel: an instance of medium use that can co-exist with other instances of medium use, with each providing service to a separate set of HIPERLAN nodes. Connection set: a sub-set of HIPERLAN
24、nodes (within one or more HIPERLANs) that are in direct radio communication range of each other. Data confidentiality: provisions for the protection of transmitted data from observation by unauthorised stations or other monitoring means. One measure for doing this is to implement encryption. Previou
25、s page is blank Data rate: instantaneous user 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. Encryption: a means of obtaining data confidentiality, (see also: Data confidentialit
26、y). End system: a system which contains application processes, which from an OS1 point of view are considered as sources and sinks of information. Communication protocols are expected to support the needs of these application processes, Forwarding: a dynamic routing mechanism that enables a HIPERLAN
27、 node to provide connectivity within one single HIPERLAN. -. NOTE: Forwarding operates independently of the underlying physical medium. HIPERLAN: denotes a situation where nodes with the same HID form a network. A HIPERLAN is a set of HIPERLAN nodes that have the same HID, and which have the logical
28、 ability to interchange traffic. HIPERLAN IDentifier (HID): a HIPERLAN sub-network identifier used to differentiate HIPERLANs from each other. All members of a given HIPERLAN use the same HID. -. HIPERLAN sharing: when two HIPERLAN nodes are able to exchange messages over the radio medium, they are
29、sharing the medium. Nodes that are not in radio contact with each other (either direct or by means of forwarding), are not sharing the medium. If two nodes that are not sharing the medium and have the same HID get within radio range, a HIPERLAN sharing function will resolve the conflict, (see also:
30、Medium). Inter-working: interaction between dissimilar sub-networks, end systems, or parts thereof, providing a functional entity capable of supporting end-to-end communications. Inter-Working Function (IWF): the interactions referred to in the inter-working definition rely on IWFs and on the means
31、to select these functions. These include the conversion of physical and electrical states and the mapping of protocols. Inter-Working Unit (IWU): an intermediate system used to inter-connect sub-networks. The IWU will contain the inter-working functions necessary to support the required network inte
32、r-working between the sub-networks. Local Area Network (LAN): a group of user stations each of which can communicate with at least one other using a common transmission medium commonly managed. Logical Link Control (LLC): IS0 8802 layer between the network layer and the MAC sub-layer of the IEEE 802
33、 reference model. MAC Service Data Unit (MSDU): the unit of data delivery between MAC Users. Medium Access Control (MAC): the sub-layer of the IS0 8802 reference model between the Physical Layer and the LLC. Node identifier: an unambiguous identifier that differentiates entities within a single HIPE
34、RLAN. Physical layer (PHY): layer 1 of the ISO/OSI reference model. The mechanism for transfer of symbols between HIPERLAN nodes. Protocol Data Unit (PDU): data unit exchanged between entities at the same IS0 layer. . Service Data Unit (SDUI: data unit exchanged between adjacent IS0 layers. Page 9 E
35、TR 133:1994 3.2 Abbreviations For the purposes of this ETR the following abbreviations apply. CA CAM DA DLC DTS ETR ETS ETSI HID HI PERLAN IEEE IS0 IWF IWU LAN LLC MAC MCRS MPDU MSDU NID os1 PCMCIA PCM PDU PHY 00s SA SCF SDU SB Channel Access Channel Access Mechanism Destination Address Data Link Co
36、ntrol, layer 2 of the ISO/OSI reference model Data Transfer Service ETSI Technical Report European Telecommunication Standard European Telecommunications Standards Institute HIPERLAN identifier Hlgh PErformance Radio Local Area Network Institute of Electrical and Electronic Engineers International S
37、tandards Organisation Inter-Working Function Inter-Working Unit Local Area Network Logical Link Control Medium Access Control Multi-Channel Resource Sharing MAC Protocol Data Unit MAC Service Data Unit Node IDentifier Open Systems Interconnection Personal Computer Memory Card Interface Association P
38、ower Concervation Mode Protocol Data Unit PHYsical layer Quality of Service Source Address System Co-ordination Function Service Data Unit Sleeping Broadcaster 4 HIPERLAN architecture overview The following description of the HIPERLAN systems architecture assumes knowledge of the OS1 Reference Model
39、 and HIPERLAN Services and Facilities. NOTE: See IS0 7498 21 for a description of the OS1 Reference Model and the conceptual division of communications functions into their respective layers and ETR 069 ll for details of HIPERLAN services and facilties and the general reference model for HIPERLAN. I
40、n addition, reference is made to support of the IS0 MAC service (see ISO/IEC 10039 31). The implications of support of the IS0 MAC service are assumed to be understood and are not repeated here unnecessarily. 4.1 General As shown in figure 1, in terms of the OS1 Reference Model, the HIPERLAN archite
41、cture addresses requirements at the Physical layer (PHY) and the MAC sub-layer of the Data Link (DL) layer. Page 10 ETR 133:1994 Physical layer Application layer Presentation layer Session layer Transport layer Network layer - Physical layer I I MAC subiaver I I Data Link layer 7 I I OS1 laver model
42、 HIPERLAN lavers Figure 1 : HIPERLAN architecture with respect to the OS1 Reference Model The HIPERLAN MAC sub-layer supports the OS1 MAC service. The OS1 MAC service defines the external interface at the upper boundary of the HIPERLAN architecture. This interface is expressed in terms of the servic
43、e primitives in table 1, Table 1 : ISO/IEC 10039 131 MAC connectionlecc mode service primitives and parameters MA-UNITDATA.request (destination-address, source-address, msdu, priority, service-class); MA-UNITDATA.indication (source-address, destination-address, msdu, reception-status, priority, serv
44、ice-class) . HIPERLAN interprets the priority and service-class (and reception-status) parameters of the MA- UNITDATA primitives in the more general sense of Quality of Service (QoS). This QoS parameter is used to enable a range of data services to be described. - _ I_ - _ W 3404583 013663L 841 W Pa
45、ge 11 ETR 133:1994 I I System Coordination Function interface IS0 10039 MAC service interface Address; mapping l S t a t i t i S C S HIPERLAN Channel Access mechanism HIPERLAN Physical layer I l I I il 1)EncryptionII I I i I I IV1 I I Security Management r I l I l l l I Multi-Channel I I I I Forwhrd
46、ing Conservation Membership I I l l I Data Transfet Services l Conservation I+ L I 1 ! 1 Figure 2: HIPERLAN MAC sub-layer block diagram The HIPERLAN MAC sub-layer interfaces to the HIPERLAN PL. The specific details of the radio transmission mechanism and channel access mechanism are hidden from the
47、HIPERLAN MAC sub- layer via an abstraction called the HIPERLAN Channel Access Mechanism (CAM). Between these two service interfaces, the HIPERLAN architecture is called upon to deal with the specific differences between HIPERLANs radio and other communications media. Under control of the functions e
48、mbedded in the Systems Co-ordination Function (SCF) HIPERLAN MAC sub-layer functions accept MAC service requests, process MAC Destination Address (DA) information to determine transmission paths for the MSDU at a Channel Access (CA) priority derived from the QoS information. Support is provided for
49、encryption of MSDU data, communication with devices capable of entering and exiting power conservation states and traffic statistics to assist in making efficient use of multiple channels. 4.2 MAC sub-layer functions The HIPERLAN MAC sub-layer supports the following functions: a) SCF - including Multi-Channel Resource Sharing (MCRS) and Power Conservation Management (PCM) functions; b) DTS function - including equitable access and power conservation transmission functions; c) addressing functions; d) forwarding functions. - - W 3404583 0336632-788 I- Page 12 ETR
