1、3404583 0109425 753 ESI ETS 300 269 March 1994 Source: ETSI TC-NA Reference: DE/NA-053026 UDC: 621.395 Key words: MAN, PICS Network Aspects (NA); Metropolitan Area Network (MAN) Physical Layer Convergence Procedure (PLCP) for 2,048 Mbit/s Protocol Implementation Conformance Statement (PICS) ETSI Eur
2、opean Telecommunications Standards Institute ETSI Secretariat 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
3、 reserved. 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 information may be embodied. Page 2 ETS 300 269:1994 m 3404583 OL0942b b9T m Whilst every care has been taken in the preparati
4、on and publication of this document, errors in content, typographical or otherwise, 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. 3404583 0109427 526 Page 3 ETS 300 269:1994 Contents . Fore
5、word . 5 1 Scope . 7 2 Normative references 7 3 Definitions . 7 4 Symbols 5 PICS for 5.1 5.2 5.3 5.4 5.5 5.6 and abbreviations . 7 the “PLCP for El Based Systems“ 8 El relationship to the PLCP . 8 The PLCP frame format . 8 PLCP field definitions 9 PLCP behaviour during faults . 10 PLCP behaviour dur
6、ing DQDB layer out of service . 10 PLCP framing . 10 Link status signal operations table . 11 5.6.1 5.6.2 Physical layer frame timing operations table 11 History 12 m 3404583 OLD9428 462 m Page 5 ETS 300 269:1994 Foreword This European Telecommunication Standard (ETS) has been prepared by the Networ
7、k Aspects (NA) Technical Committee of the European Te6ecommunications Standards Institute (ETSI). This ETC details the Protocol Implementation Conformance Statement (PICS) for the Physical Layer Convergence Procedure (PLCP) for a European Metropolitan Area Network (MAN) based on the Distributed Queu
8、e Dual Bus (DQDB) access method as defined in ETS 300 212 i21 operating at a transmission rate of 2,048 Mbit/s in accordance with ETS 300 21 3 i1 1. Previous page is blank = 3404583 OL09429 3T9 Page 7 ETS 300 269: 1994 7 Scope This European Telecommunication Standard (ETS) defines Protocol Implement
9、ation Conformance Statement (PICS) for the Physical Layer Convergence Procedure (PLCP) at 2,048 Mbit/s for use in the context of a subnetwork of a MAN as defined in ETS 300 213 Il. 2 Normative references This ETS incorporates, by dated or undated reference, provisions from other publications. These
10、normative references are cited at the appropriate places in the text and the publications are listed below. For dated references, subsequent amendments to or revisions of these publications apply to this ETS only when incorporated in it by amendment or revision. For undated references the latest edi
11、tion of the publication referred to applies. 11 1 t 21 131 ETS 300 21 3: “Network Aspects (NA); Metropolitan Area Network (MAN) Physical layer convergence procedure for 2,048 Mbit/s“. ETC 300 21 2: “Network Aspects (NA); Metropolitan Area Network (MAN) Media access control layer and physical layer s
12、pecification“. IEEE Standard 802.6 (1 990): “Distributed Queue Dual Bus (DQDB) Subnetwork of a Metropolitan Area Network“. 3 Definitions For the purposes of this ETS, the definitions as defined in IEEE Standard 802.6 i31 shall apply. 4 Symbols and abbreviations For the purposes of this ETS, the symb
13、ols and abbreviations as defined in IEEE Standard 802.6 t31 shall apply. In addition, for this PICS proforma, the following abbreviations are used in defining the support type of a feature, parameter or capability: m mandatory O optional C conditional d default value defined n/a not applicable When
14、used in the column labelled “Value“ the following abbreviations are defined: xx - YY from number xx to number yy XXJYY either number xx or number yy applies, depending on the actual conditions For each of the conditional items, an explanation of the parameter or capability under which the feature, p
15、arameter or capability is mandatory is given in the Clause or subclause in which the conditional items appear. The notation X in the column “Support“ means that numbers may be entered in this place pointing to notes whichlndicate deviation from the standard. For ease of reference, the numbering of t
16、he following Clauses is identical to that contained in ETS 300 21 3 l I. Previous page is blank m 3404583 oioq430 oio m Page 8 ETS 300 269:1994 5 PICS for the “PLCP for El based systems“ An implementation is required to conform to the functional models defined in ETS 300 21 3 11 I with regard to all
17、 of the externally observable effects. 5.1 EI relationship to the PLCP Item Feature Reference Status Predicate Value 5.1 Format per figure 1 5.2 m Table 1 Support Y 1 NL 3 x- framing References I Statucl Predicate Value Support YI 1 NI 3 x- Y 1 NC 1 X YI I c 1 x- 5.2 The PLCP frame format Table 2 Pa
18、ge 9 ETS 300 269: 1994 3404583 0107931 T57 5.3 PLCP field definitions Table 3 tem .I .2 .3 .4 .5 .6 .7 -8 .9 .IO .I1 -12 .I3 1.14 i.15 Feature :raming octets ath Overhead identification :POI) octets :oding of PO1 xtets :I octet 31 octet (BIP-8) 31 octet FEBE Iefault FEBE code larm signal GI Default
19、code for alarm signal LSS in GI octet Ignore invalid LSS codes M1 and M2 octets CI octet 21-24 octets Trai Ler octets :ef erences i.3.1 i.3.2 i.3.2 able 1 i.3.3.1 i.3.3.2 j.3.3.3 5.3.3.3 5.3.3.3 5.3.3.3 5.3.3.3 Table 2 5.3.3.3 5.3.3.4 5.3.3.5 5.3.3.6 5.3.4 Status m m m m,d m O C (NOTE 1) O C (NOTE 2
20、) m m m m,d m,d n/ a redi cate a 1 ue 111011000101000 - - 00000000 1111 O O000 O000 0000 O000 iuppor t NOTE 1: The default code 1111 shall be generated if the Far End Block Error Far End Block Error (FEBE) count is not implemented. NOTE 2: The default code O shall be generated if the alarm signal is
21、 not imp 1 ement ed. W 3404583 0309432 993 W Page 10 ETS 300 269:1994 5.4 PLCP behaviour during faults This subclause provides an overview of the behaviour of the PLCP layer during transmission system faults, PLCP faults, and DQDB layer faults. Details of the behaviour of the PLCP are given in subcl
22、ause 5.6. _- Table 4 Item Feature 5.1 5.2 5.3 5.4 Jam signal Jam signal de- tect = 270 bs Timer-P-x reset and started wher Jam signal detected T i merP-x expi res ?ef erenci 5.4 5.4 5.4 5.4 ;tatus m m m m redi cate 5.5 PLCP behaviour during DQDB layer out of service Table 5 Va 1 ue Repeat i ng 11001
23、100 octets 19111s t 0.2 ms normal operat i on relayed unmodi- Support Support 5.6 PLCP framing This subclause defines the state machine for the PLCP framing and the behaviour of the PLCP in each state of the state machine. The state machine requirements are presented first. Table 6 machine provided
24、Status Predicate Value Support I 3404583 0109433 82T Page 11 ETS 300 269:1994 6.6.1 Link status signal operations table The following table describes the behaviour of the PLCP in each state of the framing state machine; this information is in addition to the requirements in IEEE Standard 802.6 31, s
25、ection 1 1.3.1. Table 7 LSS operations (5.6.1 I m I 1 table 3 5.6.2 Physical layer frame timing operations table This subclause supplements the timing source information of tables 1 O. 1 O(b), 10.1 1, and 1 O. 12 of IEEE Standard 802.6 3 and details the physical layer frame timing operations. Table 8 m 3404583 0109434 7bb March 1994 Page 12 ETS 300 269:1994 History First Edition Document history
