1、STD-BSI BS EN ISP LObOS-3-ENGL 1797 PI LbZLibb3 Ob35bOb b8T m BRITISH STANDARD - - Information technology - International Standardized Profiles TB, TC, TD and TE - Connection-mode Tkansport Service over connection-mode Network Service Part 3. Subnetwork-type independent requirements for Group TD The
2、 European Standard EN ISP 106093 : 1996 has the status of a British Standard ICs 36.100.06 UDC 831.3621.39 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMl“ED BY COPYBIGHT LAW BS EN ISP 10609-3 : 1997 BS ISOiEC ISP renumbered, incoifpomting amendment No. 1 10609-3 : 1992 STD-BSI BS EN ISP 10b07-3-E
3、NGL 1977 lb24bbl Ob35b07 5Lb W BS EN ISP 10609-3 : 1997 Issue 2, May 1997 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Information Technology Systems Standards Policy Committee (IST/-) to Technical Committee IST/6, upon which the foll
4、owing bodies were represented: British Computer Society British Telecommunications plc Digital Equipment Co. Ltd. HM ii-easury (Central Computer and Telecommunications Agency) IBM United Kingdom Ltd. Information Systems Committee of the Universities Funclhg Council International Computem Limited bgi
5、ca UK Ltd. Ministry of Defence Rank Xerox 0 Ltd. Swift Project Consortium This British Standard, having been prepared under the direction of the hformation Systems Technologv Standards Policy commiaee, w IS published under the authority of the Standards Board and comes into effect on 15 January 1993
6、 O BSI 1997 Amendments issued since publication T May 1997 The following BSI references relate to the work on this standard Committee reference IST/6 Draft for comment 90/66810 DC ISBN O 680 21585 7 Text affected Indicated by a sideline * the margin, tc I-8-cL3 ?Ala - monitor related intedonal and E
7、uropean developments and promulgate them intheuK. NOTE. Internationai and European Standards, as well as overseas standards, are avaiiable from Customer SeMces, BSI, 389 Chiswick High Road, London W4 4AL. Compliance with a British Standard does not of itself confer immunity from legal obligations. I
8、 O BSI 1997 i STD-BSI BS EN ISP LObOS-3-ENGL 1997 m Lb24bb7 Ob35bLO O00 EUROPW sx4NDrn EN ISP 106093 NO= EUR0PEE”E EUROP - European Workshop for Open Systems (EWOS); - OS1 Implementors Workshop (OIW). ISO/IEC ISP 10609 consists of the following parts, under the general title Information technology -
9、 International Standardized Profiles TB, TC, TD and TE - Connection-mode Transport Service over connection-mode Network Service: - Part 1: Subnefwork-type independent requirements for Group T5 - Part 2: Subnefwork-type independent requirements for Group TC - Part 3: Subnetwork-type independent requi
10、rements for Group TD - Part 4: Subnetwork-type independent requirements for Group TE - Part 5: Definition of profiles TB 1 I 1 If T6 i121 iii .STD-BSI BS EN ISP 10b09-3-ENGL 1777 W Lb2Lfbb7 Ob35b15 by2 ISO/IEC ISP 10609-3:1992(E) - Part 6: Definition of profiles TC1 11 1lTC1121 - Part 7: Definition
11、of profiles TD1 I1 1lTll21 - Part 8: Definition of profiles TE1 Il 1ITE1121 - Part 9: Subnetwork-type dependent requirements for Network Layer, Data Link Layer and Physical Layer concerning permanent access to a packet switched data network using virtual calls Annexes A and B form an integral part o
12、f this part of ISOIIEC ISP 10609. iV - STD-BSI BS EN ISP LObOS-3-ENGL 1797 Lb2LibbS b3SbLb 527 ISO/IEC ISP 10609-3:1992(E) Introduction This part of ISO/IEC ISP 10609 (International Standardized Profile) is defined within the context of Functional Standardization, in accordance with the principles s
13、pecified by ISOIIEC TR 10000-1 :1990. The context of Functional Standardization is one part of the overall field of Information Technology (IT) standardization activities, covering base standards, profiles, and registration mechanisms. A profile defines a combination of base standards that collectiv
14、ely perform a specific well-defined IT function. Profiles standardize the use of options and other variations in the base International Standards, and provide a basis for the development of uniform, internationally recognized system tests. One of the most important roles for an ISP is to serve as th
15、e basis for the development (by organizations other than IS0 and IEC) of internationally recognized tests and test centres. ISPs are produced not simply to legitimate“ a particular choice of base standards and options, but to promote real system interoperability. The development and widespread accep
16、tance of tests based on this and other ISPs is crucial to the successful realization of this goal. ISO/IEC ISP 10609 consists of several parts, of which this is part 3. ISO/IEC ISP 10609?1, ISO/IEC 10609- 2, ISOIIEC 10609-3 and ISOIIEC ISP 10609-4 specify subnetwork-type independent requirements for
17、 Group TB, TC, TD and TE profiles, respectively. ISO/IEC ISP 10609-5, ISO/IEC 10609-6, ISO/IEC 10609-7 and ISO/ IEC ISP 10609-8 define TB1111/T61121, TC11 11lTB1121, TD1111/TD1121 and TE1 11 11TEl121, respectively. ISO/IEC ISP 10609-9 specifies subnetwork-type dependent requirements concerning perma
18、nent access to packet switched data network using virtual calls. V STD=BSI BS EN ISP 1ObOS-3-ENGL 1777 1b2Libb7 Ob35bL7 4b5 INTERNATIONAL STANDARDIZED PROFILE ISO/IEC ISP 10609-3:1992(E) Information technology - International Standardized Profiles TB, TC, TD and TE - Connection-mode Transport Servic
19、e over connection-mode Network Service - Part 3 Subnetwork-type independent requirements for Group TD 1 Scope This part of ISOAEC ISP 10609 is applicable to end systems concerned with operating in the Open Systems Interconnection(0SI) environment. It specifies a combination of OS1 standards, which c
20、ollectively provide the connection-mode Transport Service using the connection-mode Network Service. This part of ISO/IEC ISP 10609 is applicable to the provision of the connection-mode Transport Service in end systems attached to any type of subnetwork from which the standardized connection-mode Ne
21、twork Service can be made available. Profiles of the Connection-mode Transport Service over Connection-mode Network Service are grouped according to their required support of transport protocol class(es). Group TB : Includes transport protocol classes O, 2, and 4 Group TC : Includes transport protoc
22、ol classes O and 2 Group TD : Includes transport protocol class O Group TE : Includes transport protocol class 2 This part of ISOAEC ISP 10609 specifies the subnetwork-type independent requirements for Group TD. 2 Normative references The following documents contain provisions which, through referen
23、ce in this text, constitute provisions of this part of ISOAEC ISP 10609. At the time of publication, the editions indicated were valid. All documents are subject to revision, and parties to agreements based on this part of ISOAEC ISP 10609 are warned against automatically applying any more recent ed
24、itions of the documents listed below, since the nature of references made by ISPs to such documents, is that they may be specific to a particular edition. Members of IEC and IS0 maintain registers of currently valid International Standards and ISPs, and CCITT maintains published editions of its curr
25、ent Recommendations. IS0 807211 986, Information processing systems - Open Systems Interconnection - Transport service definition. (See also CCITT Recommendation X.214-1988) ISO/I EC 8073:l 988, InformaYm processing systems - Open Systems Interconnection - Connection oriented transport protocol spec
26、ification. (See also CCITT Recommendation X.224-1988) ISO/I EC 8073/Add .1:1988, Information processing systems - Open Systems Interconnection- Connection oriented transport protocol specification - Addendum 1 :Network connection management subprotocol. (See also CCITT Recommendation X.224-1988) 1 S
27、TD=BSI BS EN ISP LObOS-3-ENGL 1797 = Lb24bb7 Ob35bLB 3TL ISOIIEC ISP 10609-3:1992(E) ISO/I EC 8073/Amd.3:1992, Information processing sy these requirements are specified in subsequent parts of ISO/IEC ISP 10609. 5.2 Transport Layer Requirements This part of ISO/IEC ISP 10609 specifies provision of t
28、he connection-mode Transport Service, as defined by IS0 8072, using classe O of the connection-mode Transport Protocol, as defined by ISO/IEC 8073 which defines the operation of classes O, 1,2,3 and 4 over the connection -mode network service, defined in IS0 8348. Annex B contains defect reports, if
29、 any, related to ISO/IEC 8073 along with the statement of any consequential requirements for implementations of these profiles. A conforming implementations constraints are given in annex A which defines the IPRL for the Transport protocol. 5.2.1 Static conformance requirements A conforming implemen
30、tation shall a) satisfy the conformance requirements as stated in ISO/IEC 8073, clause 14 , 2 STD=BSI BS EN ISP LDbOS-3-ENGL 1997 Lb2qbb7 Ob35bL9 238 no param cc Calling O len lenO ISO/IEC ISP 10609-3:1992() b) support the mandatory features for class O, as defined in ISO/IEC 8073, NIL NIL note4 NIL
31、 NIL invalid invalid invalid note3 c) if it claims to be capable of initiating TC establishment, be capable of 1) transmitting a Called TSAP-ID field in a CR TPDU. 2) when necessary, transmitting a Calling TSAP-ID field in a CR TPDU that can convey any one of the Transport Selectors implemented by t
32、he system, 1) transmitting a Calling TSAP-ID field in a CC TPDU. 2) when necessary, transmitting a Called TSAP-ID field in a CC TPDU that can convey any one of the Transport Selectors implemented by the system, e) be capable to configure the initial values of TS1 and TS2, if implemented. It is stron
33、gly recommended that a confromant system should implement and use TS1 and TS2. d) if it claims to be capable of responding to a TC establishment attempt, be capable of param cc Called O Jen lens0 5.2.2 Dynamic conformance requirements NIL NIL note1 NIL NIL invalid invalid invalid note2 a) TSAP-ID Th
34、e implementation shall support remote TSAP-ID parameters of variable size up to and including 32 octets using any encoding and any value. Local T-selectors shall not exceed 32 octets in length. On receipt of a CR TPDU the absence of a Calling or Called TSAP-ID parameter shall be treated as equivalen
35、t to a zero length Calling or Called TSAP-ID parameter. The absence of the CC Calling TSAP-ID parameter on receipt indicates that the value of CC Calling TSAP-ID parameter is equivalent to the value of CR Calling TSAP-ID parameter. The absence of the CC Called TSAP-ID parameter on receipt indicates
36、that the value of CC Called TSAP-ID parameter is equivalent to the value of CR Called TSAP-ID paramter. Figure 1 summarizes the handling of Called and Calling TSAP-ID parameters in CR and CC TPDUs. CR Called no param Olen lem0 NOTES 1 - CC Called is equivalent to CR Called. 2 - CC Called must match
37、in length and value to CR Called. 3 - CC Calling must match in length and value to CR Calling. 4 - CC Calling is equivalent to CR Calling. Figure 1 - Handling of Called and Calling TSAP-ID parameters b) Invalid Values in Known Parameters Known parameters with invalid lengths in a CR or CC TPDU shall
38、 be handled as a protocol errors. Known parameters with valid lengths but invalid values in a CR TPDU shall be handled as follow. Parameter Action Called TSAP-ID send DR TPDU 3 STD-BSI BS EN ISP 1ObO9-3-ENGL 1997 W LbZqbb9 Ob35b20 T5T H ISOIIEC ISP 10609-3:1992(E) c) Treatment of protocol errors If
39、the ER TPDU is supported in class O, an ER TPDU shall contain the octets of the invalid TPDU up to and including the octet where the error was detected and TS2 timer, if implemented, shall be started. d) Network Connection Management Subprotocol (1 ) Transport Protocol Identification Procedure Trans
40、port Protocol Identification Procedure for identifying the IS0 8073 protocol shall be performed in accordance with ISO/IEC 8073/Add.l and CCITT Recommendation X.224, annex B. (2) Network Connection Management Procedure The network connection management function of ISOIIEC 8073lAdd.l is outside the s
41、cope of this part of ISOAEC ISP 10609. 4 STDOBSI BS EN ISP LObOS-3-ENGL 1997 W Lb24bb9 Ob35b2L 79b ISOAEC ISP 10M)9-3:1992(E) Annex A (normative) International Standardized Profile Implementation Conformance Statement Requirements List (IPRL) Introduction This IPRL in this annex specifies requiremen
42、ts for implementations of ISOAEC 8073Amd.3. Group independent IPRL for Transport Layer is specified in ISOAEC ISP 10609-1, annex A.2. Specification of each protocol class is applicable to all Transport profile groups which use the same protocol class. This annex provides the Group dependent Transpor
43、t Layer IPRL. A conforming implementation shall satisfy the mandatory conformance requirement of the base standards referenced in this part of ISO/IEC ISP 10609. A.l Notation Clause A.2 defines the functions supported for which conformance is claimed, using the following keys. a) Base Standard Statu
44、s Notation M ; Mandatory O O.en : ; Optional to implement. if implemented, the feature may or may not be used. ; Optional, but support of at least one of the group of options labelled by the same numeral in this PICS proforma is required. ; This predicate symbol means that the status following it ap
45、plies only when the PICS states that the feature identified by the index is supported. In the simplest case, is the identifying tag of a single PICS item. may also be a Boolean expression composed of several Indices. ; When this group predicate is true the associated clause should be completed. : b)
46、 IPRL Status Notation The status column of Profile Features is entered up by the one character or the two character notation. The one character notation indicates the static requirements only. On the two character notation, the first character is the static requirements and the second is the dynamic
47、 requirements. 1)StatiC m i ; Mandatory, mandatory to be implemented. ; Out of Scope, not relevant to this Profile. 2)Dynamic Not used in this IPRL. 5 STD*BSI BS EN ISP LObDS-3-ENGL 1777 1bZqbbS Ob35bZ2 A22 ISMEC ISP 106093:1992(E) Issue 2, May 1997 CO c1 c2 c3 c4 C4L A.2 TD Dependent Transpoit Laye
48、r IPRL A2.1 Protocol Implementation A.2.1.1 Classes implemented Class O 14 IS0:O.l Class 1 14 c0:o Class 2 14 IS0:O.l Class 3 14 c20 Class 4 operation over CONS 14 c2:o Class 4 operation over CLNS 14 ISo:C2:0 I Base Standard Features I ISP References b Class I References I Status I A22 Negotiation A
49、.2.2.1 Class negotiation - responder side Index RCO RC2a RC4a Base Standard Features Preferred class What classes can you respond with if CR proposes only class O What classes can you respond with if CR proposes class 2 as preferred class and the alternative class parameter is present What classes can you respond with if CR proposes class 4 as preferred class and the alternative class parameter is present I References Ilowed Responses P 6.5.4 h) Table 3 6.5.4 h) Table 3 6.5.4 h) Table 3 O or connection refused depending on classes WPpofld O, 2 or connection refused dependi
