1、BRITISH STANDARD BS EN 1997 1996 61334-4-32 : EC 613344-32 : Distribution automation using distribution line carrier system Part 4. Data communication protocols Section 32. Data link layer - Logical link control (LLC) The European Stanard EN 613344-32 : 1997 has the status of a British Standard ICs
2、29.240.20; 35.100.20 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BS EN 61334-4-32 : 1997 AmdNo. National foreword Date Text affected This British Standard is the English language version of EN 61334432 : 1997. It is identical with IEC 613344-32 : 1996. The IJK participatio
3、n in its preparation was entrusted to Technical Committee PEy57, Power system control and associated communications, which has the responsibility to: - aid enquirers to understand the text; - present to the responsible internationaM3uropean committee any enquiries on the interpretation, or proposals
4、 for change, and keep the UK interests informed - monitor related international and European developments and promulgate them in the UK. This British Standard, having been prepared under the Mon of the Electrotechnical Sector Board, was published under the authority of the Standards Board and comes
5、into effect on 15 November 1997 O BSI i997 A list of organizations represented on this committee can be obtained on request to its secretary. From 1 January 1997, all IEC publications have the number 60000 added to the old number. For instance, IEC 27-1 has been renumbered as IEC 60027-1. For a peri
6、od 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 CENELEC Standards normally include an annex which lists normative references to international publications wit
7、h their corresponding European publications. The British Standards which implement these internationai or European publications may be found in the BSI Standards Catalogue under the section entitled International Standards Correspondence Index, or by using the Find facility of the BSI Standards Elec
8、tronic Catalogue. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 36, an inside back cover and a back cover. ISBN O 680 28701 7 STD-BSI BS EN bL3
9、34-4-32-ENGL 1797 = Lb24bb7 Ob58270 42T m * u) * EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 61 334-4-32 December 1996 ICs 35.100.20 Descriptors: Electric power. distribution automation, line carrier systems, data communication protocols, data link layer, logical link control English versio
10、n Distribution automation using distribution line carrier systems Part 4: Data communication protocols Section 32: Data link layer - Logical link control (LLC) (IEC 1334-4-32: 1 996) Automatisation de la distribution laide de systmes de communication courants porteurs Partie 4: Protocoles de communi
11、cation de donnes Section 32: Couche de liaison de donnees - Contrle de liaison logique (LLC) (CE1 1334-4-32: 1996) Verteilungsautomatisierung mit Hilfe von Trgersystemen auf Verteilungsleitungen Teil 4: Datenkornmunikationsprotokolle Haupta bschnitt 32: Sicherungsschicht, Steuerung logischer Verbind
12、ungen (LLC) (IEC 1334-4-32: 1996) This European Standard was approved by CENELEC on 1996-1 0-01. CENELEC members are bound to comply with the CENKENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-
13、to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
14、under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Ital
15、y, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1
16、050 8rurseis o 1996 Copyright reserved to CENELEC members Ref. No. EN 61334-932:1996 E STD-BSI BS EN b1334-4-32-ENGL 1797 1b24bb Ob58271 3bb Page 2 EN 61334-4-32 : 1996 Foreword The text of document 57/266/FDIS, future edition 1 of IEC 1334-4-32, prepared by IEC TC 57, Power system control and assoc
17、iated communications, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 61334-4-32 on 1996-1 0-01. The following dates were fixed: - latest date by which the EN has to biimpiemented at national levei by publication of an identical national standard or by endorsement (d
18、p) 1997-07-01 - latest date by which the national standards conflicting with the EN have to be withdrawn (daw) 1 997-07-0 1 Annexes designated “normative“ are part of the body of the standard. In this standard, annex ZA is normative. Annex ZA has been added by CENELEC. Endorsement notice The text of
19、 the International Standard IEC 1 334-4-32: 1 996 was approved by CENELEC as a European Standard without any modification. STD-BSI BS EN bL334-4-32-ENGL 1997 9 Lb24bb7 b58272 2T2 M Page 3 EN 61334-4-32 : 1996 CONTENTS Clause Page 1 General 5 . 1.1 Scope and object . 1.2 Normative references 2 LLC se
20、rvice specification 2.1 Overview of interactions 2.2 DL-Data.request . 2.3 DL-Data.confirm . 2.4 DL-Datahdication 2.5 DL-Reply.request 2.6 DL-Reply.confirm 2.7 DL-Reply.indication . 2.8 DL-Update-Reply.request . 2.9 DL-U pdate-Repiy.conf irm . 2.10 DL-Update-Repiy.indication 2.1 1 DL-Broadcast.reque
21、st . LLC to MAC sublayer interface . 3.1 Overview of interactions 3.2 MA-Data.request . 3.3 MA-Data.confirm . 3.4 MA-Datahdication . LLC protocol data unit structure (LLC-PDU) 4.1 General . 4.2 LLC-PDU format . 4.3 Control field . 4.4 Address field . 4.5 Invalid LLC-PDU . 5 LLC procedures descriptio
22、n 3 4 7 9 10 11 12 12 13 14 15 16 16 17 17 17 18 18 19 19 19 21 22 23 23 . 5.1 Overview of the procedures 23 5.2 Sender and receiver state tables 24 5.3 Transitions table description 32 Tables 1 Sender state transition table . 25 2 Receiver state transition table . 29 Q BSI 1997 STD-BSI BS EN b1334-
23、4-32-ENGL 1777 Lb24bb9 b58273 139 Page 4 EN 61334-4-32 : 1996 Figures 1 2 3 4 5 6 7 a 9 10 11 Relationship to reference model Send Data Non-acknowledged . Update-Reply . Reply Data on Request . Transmission example LLC-PDU format Control field DSAP and SSAP SDN state diagram . RDR state diagram . :
24、. Receiver state diagram . Annex ZA (normative) Normative references to international publications with their corresponding European publications Page 6 7 8 8 9 20 21 23 27 28 31 36 O BSI 1997 * * m STDnBSI BS EN bL334-4-32-ENGL 1997 D Lb24bb7 0658274 075 D Page 5 EN 61334-4-32 : 1996 DtSTRIBUTION A
25、UTOMATION USING DISTRIIBUTION LINE CARRIER SYSTEMS - Part 4: Data communication protocols - Section 32: Data link layer - Logical link control (LLC) 1 General 1.1 Scope and objeci This section of IEC 1334-4 covers the services required o, or by, the DCP Logical Link Control (LLC) sublayer entity at
26、the logical interfaces with the application layer and the MAC sublayer. In general, the services of a layer (or a sublayer) are the capabilities which it offers to a user in the next layer. In order to provide its service, a layer (or a sublayer) builds its functions on the services which it require
27、s from the next lower layer or sublayer. Services are specified by describing the information flow between the application layer and the MAC-sublayer. That is by describing the service primitives and parameters which characterize each service. These primitives are associated with the connectionless
28、transmission. NOTES 1 This section refers to the three-layer reference model described in IEC 1334-4-1 but provisions are made for tuture extensions of this modei to more than three layers. 2 Provisions are also made in this section for future extensions to connection oriented transmission. In this
29、clause, reference is made to the OS1 reference model IS0 7498. 1.2 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
30、normative documents are subject to 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 IC0 maintain registers of currently valid Inter
31、national Standards. LEC 1334-4-1 :1996, Distribution automation using distribution line carrier systems - Part 4: Data communication protocols - Section 7: Reference model of the communication system IS0 7498: 1984, Information processing systems - Open Systems Interconnection - Basic Reference Mode
32、l STD.BS1 BS EN b1334-4-32-ENGL 1997 D Lb24bb9 b58275 TO1 Page 6 EN 61334-4-32 : 1996 Application layer DL-Broacast Upate-Reply Services Services LLC sublayer IA MAC sublayer t r I Physical layer ,-I Figure 1 - Relationship to reference model - STD-BSI BS EN b133Y-4-32-ENGL 1777 = LbZLibbS Ob5827b 7
33、48 D Page 7 EN 61334-4-32 : 1996 2 LLC service specification This clause specifies the services required of the LLC sublayer by the application layer, as viewed from the application layer, to allow a local application layer entity to exchange packets with remote peer application layer entities using
34、 DCP LLC operations at the logical link control sublayer. The services are described in an abstract way. 2.1 Overview of interactions 2.1.1 Basic services Three ground services are proposed as usual in the OS1 model for the main transmission purposes: - DL-Data.request e - DL-Data.confirm - DL-Data.
35、 i ndication These services are non-acknowledged and in connectionless mode. LOCAL STATI ON REMOTE STATION Figure 2 - Send Data Non-acknowledged 2.1.2 Unsolicited services Six services are proposed for providing facilities to transfer unsolicited L-SDU between a remote application layer entity and t
36、he local application layer entity: - DL-Reply.request - DL-Replyhdication - DL-Reply.confirm STD-BSI BS EN bL334-4-32-ENGL 1777 9 lb24bb9 Ob58277 884 9 Page 8 EN 61334-4-32 : 1996 The DL-Repiy.services are designed for asking the remote LLC sublayer entity to send a previously prepared L-SDU. - DL-U
37、pdate-Repiy.request - DL-Update-Reply.indication - DL-Update-Reply.confirm The DL-Update-Reply services are designed to prepare DL-Reply services. LOCAL STATION REMOTE STATION Figure 3 - Update-Reply Am- LLC MAC MAC UC - LOCAL STATION REMOTE STATION Figure 4 - Reply Data on Request STD-BSI BS EN bL3
38、34-4-32-ENGL 1777 lb24bb7 b58278 710 II Page 9 EN 61334-4-32 : 1996 LOCAL STATION REMOTE STATION Figure 5 - Transmission example 2.1.3 M8n8g8m8nt S8Wh One service is provided for management purposes: - D L-Broadcast . req uest This service uses the broadcast facilities available at the MAC sublayer
39、entity. This service is used to transmit very few data to all peer LLC sublayer entities. 2.2.1 Function The DL-Data.request primitive is passed to the LLC sublayer entity to request that an L-SDU be sent to a remote LLC sublayer entity or entities using the LLC transmission procedures. 2.2.2 struct
40、ure The semantics of the primitive are as follows: DL-Data.request ( Destination-LSAP, Sou rce-LSAP, Dest i nation-add ress, L-SDU, Lin k-class 1 The Source-LSAP and Destination-LSAP parameters specify the local and remote LSAPs involved in the data unit transmission. STD-BSI BS EN bL33q-q-32-ENGL 1
41、977 D Lb24bb9 Ob5B279 b57 D Page 10 EN 61334-4-32 1996 The Destination-address parameter specifies the address of the remote station involved in the data unit transmission. The L-SDU parameter specifies the link data unit to be transferred by the LLC sublayer entity to the peer LLC sublayer entity o
42、r entities. The Link-class parameter is reserved for future DL-Data transfer service extension. 2.2.3 Use This primitive is generated by the application layer entity whenever data is transmitted to a peer application layer entity or entities. The receipt of this primitive will cause the LLC sublayer
43、 entity to append all LLC specific fields (given below) and pass the properly formed L-PDU to the lower layers of protocol for transfer to the peer LLC sublayer entity or entities. The receipt of this primitive will generate a MA-Data.request for transfer to the MAC sublayer entity. 2.3 DL- Data.con
44、firm 2.3.1 Function The DL-Data.confirm issues a local confirmation of the transmission of the L-PDU. This primitive has only local significance and provides an appropriate response to the application layer entity which initiated a DL-Data.request primitive indicating the local success or failure of
45、 the request, as specified by the lower levels. 2.3.2 Structure The semantics of the primitive are as follows: DL-Data.confirm ( Desti nation-LSAP, Sou rce-LSAP, Destination-address, Transmission-Status ) The Source-LSAP and Destination-LSAP parameters specify the local and remote LSAPs involved in
46、the data unit transmission. The Source-LSAP parameter specifies the LSAP which has previously issued a DL-Data.request and to which the confirm has to be sent. The Destination-address parameter specifies the address of the remote st.ation involved in the data unit transmission. The Transmission-Stat
47、us parameter is used to pass status information back to the local requesting application layer entity. It is used to indicate the success or failure of the previous associated DL-Data.request primitive. * m * STD-BSI BS EN b2334-4-32-ENGL 1997 m Lb24bb9 Ob58280 379 m Page 11 EN 61334-4-32 : 1996 2.3
48、.3 Use This primitive is generated in response to a DL-Data.request primitive back to the local application layer entity. This primitive is generated on an incoming MA-Data.confirm service issued by the local MAC sublayer entity. It is assumed that sufficient information is available to the applicat
49、ion layer entity to associate the response with the appropriate request. 2.4 DL-Daa.indication 2.4.1 function The DL-Datahdication primitive is passed from the LLC sublayer to the application layer entity or entities to indicate the arrival of a L-PDU. This primitive defines the transfer of data from the LLC sublayer entity to the application layer entity or entities. 2.4.2 Structure The semantics of the primitive are as follows: D L-Dat a. ind cat ion ( Desti nation-LSAP , Sou rce-LSAP, Desti nation-add
