1、STD-BSI BS EN bL33q-q-qZ-ENGL 1997 9 Lb24bb7 Ob58357 74T BRITISH STANDARD Distribution automation using distribution line carrier system Part 4. Data communication protocols Section 42. Application protocols - Application layer The European Standard EN 61334442 : 1997 has the status of a British Sta
2、ndard ICs 35.100.70 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BS EN 1997 1996 61334-4-42 : IEC 61334-4-42 : BS EN 61334-4-42 : 1997 National foreword This British Standard is the English language version of EN 61334-4-42 : 1997. It is identical with IEC 61334-442 : 1996.
3、 The UK participation in its preparation was entrusted to Technical Committee PEIJ57, Power system control and associated communications, which has the responsibility to: - aid enquirers to understand the text; - present to the responsible internationaYEuropean committee any enquiries on the interpr
4、etation, or proposals for change, and keep the UK interests informed; - monitor related intedonal and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Rom 1 January 1997, all IEC publications have
5、the number 60000 added to the old number. For instance, IEC 27-1 has been renumbered as IEC 60027-1. For a period of time during the change over from one numbering system to the other, publications may contain identifiers from both systems. Cross-references Attention is dram to the fact that CEN and
6、 CENELEC Standards normally include an annex which lists nonnative references to intedonai publications with their corresponding European publications. The British Standards which implement these international or European publications may be found in the BSI Standards Catalogue under the section ent
7、itled International Standards Correspondence Index, or by using the Find facility of the BSI Standards Electronic Catalogue. Compliance with a British Standard does not of itself confer immunity from legai obligations. Summary of pages This document comprises a ftont cover, an inside front cover, th
8、e EN title page, pages 2 to 46, an inside back cover and a back cover. This British Standard, having been prepared under the direcon of the Electrotechnicd Sector Board, was published under the authority of the Standards Board and comes into effect on 15 November 1997 O BSI 1997 ISBN O 680 28700 9 A
9、mendments issued since publication Amd.No. ID Definitions 3.1 Reference model definitions . 3.2 3.3 Service conventions definitions 3.4 Abbreviations . Application layer concepts 5.1 Introduction . 5.2 Application processes 5.3 Application entities Naming and addressing definitions Application layer
10、 specific definitions . 5.4 Application service elements 5.5 Application-associations 5.6 Application context 5.7 Single association object . 5.8 Single association control function . 5.9 Names and directory functions . 5.1 O Use of application-association . 5.1 1 Use of the data link services 5.12
11、Application service element standards . 5.1 3 Abstract syntax definition . 5.14 Encoding rules 5.1 5 DCP restrictions 5.1 6 Registration requirements Association control service element (ACSE) 6.1 ACSE specific definitions . 6.2 Basic concepts 6.3 Relationship with other ASES . 6.4 Connectionless-mo
12、de ACSE service 6.5 Connectionlesc.mod. e ACSE protocol . 6 6 7 7 8 8 8 10 10 10 11 11 12 12 12 13 13 14 14 15 15 15 15 16 16 16 17 17 18 18 20 BSI 1997 Page 4 EN 61334-4-42 : 1996 Clause Page 7 DLMS application entity 7.1 Overview . i 7.2 General structure 7.3 Client-DLMS ASE 7.4 Server-DLMS ASE .
13、Elements of protocol procedure 8.1 Descriptive convention . 8.2 Mapping to ACSE and data link services 8.3 Entering and leaving the DLMS environment 8.4 Operating in the DLMS environment 8 22 22 22 26 26 27 27 27 29 34 Annexes A Default application context 43 B Bibliography . 45 ZA Normative referen
14、ces to international publications with their corresponding European publications . 46 STD-BSI BS EN b1334-4-42-ENGL 1777 lb24bb9 Ob583b5 T43 9 Page 5 EN 61334-4-42 : 1996 INTRODUCTION The application layer supports the DLMS application specification and the management application of each station. DC
15、P makes use of the connectionless ACSE IS0 standards and of the application service elements DLMS and management. * * rn STD.BS1 BS EN b1334-4-42-ENGL 1797 I Lb24bb9 Ob583bb 9T W Page 6 EN 61334-4-42 : 1996 DISTRIBUTION AUTOMATION USING DISTRIBUTION LINE CARRIER SYSTEMS - Part 4: Data communication
16、protocols - Section 42: Application protocols - Application layer 1 Scope The specifications of the sections of IEC 1334-4 apply to the communication through the so- called distribution line carrier technology (DLC) on both low and medium voltage distribution networks. The application range based on
17、 telecommunication processes is wide and cannot be described exhaustively in this section; application examples are: control and monitoring of the distribution network, order broadcast, control of user interfaces, public lighting, traffic lights supervision, automatic meter reading, etc. This sectio
18、n of IEC 1334-4 describes the rules used to design an application service element, the IS0 connectionless ACSE, and the DLMS Application Service Element. Extensions to other communication media are also allowed. The mapping of the DLMS services is based on the three-layer stack. Future extensions to
19、 stacks of more than three layers are possible and may use the rules described in this section. in such a case, the DLMS interface with the underlying layers should be remapped to the new one: the specification of the mapping criteria will be dealt with in corresponding appendices, in respect of the
20、 rules defined in this section. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this section of IEC 1334-4. At the time of publication, the editions indicated were valid. All normative documents are subject t
21、o revision, and parties to agreements based on this section of IEC 1334-4 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. Members of IEC and IS0 maintain registers of currently valid International Standards. IEC 1334-4-1
22、:1996, Distribution automation using distributlon line carrier systems - Part 4: Data communication protocols - Section 1: Reference model of the communication system IEC 1334-4-32: 1996, Distribution automation using distribution line carrier systems - Part 4: Data communication protocols - Section
23、 32: Data link layer - Logical link control (LLC) IEC! 1334-4-41 : 1996, Distribution automation using distribution line carrier systems - Part 4: Data communication protocols - Section 4 1: Application protocols - Distribution line message specification * * rn Page 7 EN 61334-4-42 : 1996 IS0 7498:
24、1984, Information processing systems - Open Systems Interconnection - Basic Reference Model IS0 7498-3: 1989, Information processing systems - Open Systems Interconnection - Basic Reference Model - Part 3: Naming and Addressing ISO/TR 8509: 1987, Information processing systems - Open Systems Interco
25、nnection - Services conventions IS0 8649: 1988, Information processing systems - Open Systems Interconnection - Service definition for the Association Control Service Element Amendment 2 (1 991): Connectionless-mode ACSE service ISO/IEC 8824: 1990, Information technology - Open Systems Interconnecti
26、on - Specification of Abstract Syntax Notation One (ASN. 1) ISO/IEC 8825: 1990, Information technology - Open Systems Interconnection - Specification of Basic Encoding Rules for Abstract Syntax Notation One (ASN. 7) b) application process; c) application entity; d) (N) - function; e) (N) - layer; f)
27、 (N) - protocol; g) (N) - protocol-control-information; h) (N) - protocol-data-unit; i) real open system. STD*BSI BS EN bL33q-LI-42-ENGL 1997 Lb24bb9 Ob583b8 752 W Page 8 EN 61334-4-42 : 1996 3.2 Naming and addressing definitions This section makes use of the following terms: a) application-process
28、title; b) application-entity qualifier; c) application-entity title; d) application-process invocation-identifier; e) application-entity invocation-identifier. 3.3 Service conventions definitions This section makes use of the following terms defined in ISO/TR 8509: a) service-provider; b) service-us
29、er; c) confirmed service; d) non-confirmed service; e) provider-initiated service; f) primitive; g) request (primitive); h) indication (primitive); i) response (primitive); j) confirm (primitive). 3.4 Application layer specific definitions 3.4.1 Application-association, association A co-operative re
30、lationship between two applications-entities, formed by their exchange of application-protocol-control-information through their use of data link services. The relationship enables the communication of information and the co-ordination of their joint operation for an instance of communication. 3.4.2
31、 Application context An explicitly identified set of application-service-elements, related options and rules shared in common by two application entity-invocations that are necessary for the interworking of application-entities in an application-association. 3.4.3 Application-directory- function An
32、application-function that processes data link addresses, application-entity-titles, and application-protocol-addressing-information to provide mapping among these categories of information. 3.4.4 Application-entity-invocation A specific use of part or all of the capabilities of a given application-e
33、ntity in support of the communications requirements of an application-process-invocation. STD-BSI BS EN bL334-q-42-ENGL 1797 = Lb2Libb7 Ob583b7 b97 Page 9 EN 61334-4-42 : 1996 3.4.5 Application-entity-type A specific set (called type) of application-entity functions that share common characteristics
34、. Such a type may be referenced with a name. 3.4.6 Application- function An identifiable stand alone part of the activity of application-entities. 3.4.7 Applica tion-p rocess-in voca tion A specific utilization of part or all of the capabilities of a given application-process in support of a specifi
35、c occasion of information processing. 3.4.8 Applica tion-process-type A specific set (called type) of application-process functions that share common characteristics. Such a type may be referenced with a name. 3.4.9 Applica tion-protocol A set of rules and formats (semantic and syntactic) which dete
36、rmines the communication behaviour of application-entities in the performance of application-functions. 3.4.1 O Application-protocol-addressing-information Those elements of the application-protocol-control-information which contain addressing information. 3.4.1 1 Application-protocol-control-inform
37、ation The information exchanged between application-entities using data link services, to co-ordinate their joint operation. This information is contained in application-protocol-data-unit. 3.4.12 Application-protocol-d8ta-unit A unit of information, specified in an application-protocol, that consis
38、ts of application-protocol- control-information and, possibly, user information. 3.4.1 3 Application-service-element A set of functions that provide a capability for the interworking of application-entity-invocations for a specific purpose on a single application-association. NOTE - This definition
39、refines the original definition of application-service-elements in IS0 7498, but is as specified in iSO/IEC 9545. 3.4.1 4 Association-control-service-element An application-service-element that provides a single consistent means for establishing and terminating all application-associations. STD-BSI
40、BS EN bL339-q-42-ENGL 1997 2b2Libb9 Ob58370 300 Page 10 EN 61334-4-42 : 1996 4 Abbreviations For the purposes of this International Standard, the following abbreviations apply: AA ACSE AE AEI AP APAI APCI APDU ASE DACE DLMS os1 application-association; association control service element; applicatio
41、n entity; application entity invocation; application process; application protocol addressing information; application protocol control information; application protocol data unit; application service element; DLMS application service element; distribution line message specification; open systems in
42、terconnection. 5 Application layer concepts This clause describes the application layer concepts as they are defined in ISOAEC 9545. The concepts developed in this standard were designed for the seven layers connection oriented OS1 model. DCP makes use of a three layers connectionless model, but the
43、 concepts still apply. This specification, then, re-uses most of the ISO/IEC 9545 concepts and structure with the following special considerations: - because no presentation layer is available, all references to it are removed and its necessary functionalities are performed directly by the applicati
44、on layer; -. the application layer makes a direct use of the data link services; - the ACSE referenced by the DCP specification uses only unconfirmed services as defined in the IS0 8649 amendment 2. 5.1 Introduction Standards for OS1 are intended to support the communication requirements of applicat
45、ions (that is information processing tasks) requiring co-ordinated processing activities in two or more real open systems. In particular, standards for the OS1 application layer define procedures for the support of distributed information processing. - - STDDBSI BS EN bL334-4-42-ENGL 1997 I Lb24bb9
46、Ob58371 247 W Page 11 EN 61334-4-42 : 1996 The application layer is supported by the lower layers in OSI. In DCP, this in particular means the application layer making use of the data link services specified in future IEC 1334-4-31 l and in IEC 1334-4-32. The application layer differs from the other
47、 layers of OS1 in several important respects: - entities in the application layer are made up of a collection of application-service- elements (ASEs), each of which is defined by a set of service and protocol standards. These ASEs are combined in various ways, to form various types of AEs; - the app
48、lication layer, as the highest layer of OSI, does not provide a service to a higher layer; - the associations formed by the communication of protocol-control-information between entities in the application layer have a particular significance. 5.2 Application processes An AP represents a set of reso
49、urces, including processing resources, within a real open system that may be used to perform a particular information processing activity (the AP concept is defined in IS0 7498). An AP may require that its interactions with other APs be organized into a number of distinct parts, which may be invoked either simultaneously, or serially, or both. 5.3 Application entities The aspects of an AP which need to be taken into account for the purpose of OS1 are represented by one or more AEs. An AE represents a set of OS1 communication capabilities of a particular AP. An A
