1、INTERNATIONAL TELECOMMUNICATION UNION)45G134 8 TELECOMMUNICATIONSTANDARDIZATION SECTOROF ITU/0%.G0G03934%-3G0G0).4%2#/%#4)/.#/%#4)/.G13-/$%G0G002/4/#/,G0G030%#)(b) that Recommendation X.210 defines the service conventions for describing the services of the OSIreference model;(c) that Recommendation
2、X.216 defines the Presentation Layer service;(d) that Recommendation X.217 defines the Association Control service;(e) that Recommendation X.218 defines the Reliable Transfer service;(f) that Recommendation X.219 defines the Remote Operations service and notation;(g) that there is a need for common
3、Remote Operations support for various applications,unanimously declaresthat this Recommendation defines the Remote Operations protocol of Open Systems Interconnection forCCITT Applications as given in the Scope and Field of Application.CONTENTS0 Introduction1 Scope and field of application2 Referenc
4、es3 Definitions4 Abbreviations5 Conventions6 Overview of the Protocol7 Elements of procedure8 Mapping to used services9 Conformance_1)Recommendation X.229 and ISO 9072-2 Information processing systems - Text Communication-RemoteOperations Part 2: Protocol specification were developed in close collab
5、oration and are technically aligned.2 Fascicle VIII.5 - Rec. X.22910 ConformanceAnnex A - ROPM State TablesAnnex B - Differences between this Recommendation and Recommendation X.410-1984Annex C - Summary of assigned object identifier values0 IntroductionThis Recommendation specifies the protocol for
6、 the services provided by an application-service-element - theRemote Operations Service Element (ROSE) - to support interactive applications in a distributed open systemsenvironment. This Recommendation is one of a set of Recommendations defining sets of application service-elementscommonly used by
7、a number of applications.Interactions between entities of a distributed application are modelled as Remote Operations, and definedusing a Remote Operations Notation. A Remote Operation is requested by one entity; the other entity attempts toperform the Remote Operation and then reports the outcome o
8、f the attempt. Remote Operations are supported by theROSE.This Recommendation is technically aligned with ISO 9072-2.1 Scope and field of applicationThis Recommendation specifies the protocol (abstract syntax) and procedures for the Remote OperationService Element (Recommendation X.219). The ROSE se
9、rvices are provided in conjunction with the AssociationControl Service Element (ACSE) services (Recommendation X.217) and the ACSE protocol (RecommendationX.227), optionally the Reliable Transfer Service Element (RTSE) services (Recommendation X.218) and the RTSEprotocol (Recommendation X.228), and
10、the presentation-service (Recommendation X.216).The ROSE procedures are defined in terms of:a) the interactions between peer ROSE protocol machines through the use of RTSE services or thepresentation-service;b) the interactions between the ROSE protocol machine and its service-user.This Recommendati
11、on specifies conformance requirements for systems implementing these procedures.2 ReferencesRecommendation X.200 - Reference model of open systems interconnection for CCITT applications (see alsoISO 7498).Recommendation X.208 - Specification of abstract syntax notation (see also ISO 8824).Recommenda
12、tion X.209 - Specification of basic encoding rules for the abstract syntax notation (see also ISO 8825).Recommendation X.210 - Open systems interconnection layer service definition conventions (see also ISO/TR 8509).Recommendation X.216 - Presentation service definition for open systems interconnect
13、ion for CCITT applications(see also ISO 8822).Recommendation X.217 - Association control service definition for CCITT applications (see also ISO 8649).Recommendation X.218 - Reliable transfer: model and service definition (see also ISO 9066-1).Recommendation X.219 - Remote operations: model, notatio
14、n and service definition (see also ISO 9072-1).Recommendation X.227 - Association control protocol specification for CCITT applications (see also ISO 8650)Fascicle VIII.5 - Rec. X.229 3Recommendation X.228 - Reliable transfer: protocol specification (see also ISO 9066-2).3 Definitions3.1 Reference m
15、odel definitionsThis Recommendation is based on the concepts developed in Recommendation X.200 and makes use of thefollowing terms defined in it:a) application layer;b) application-process;c) application-entity;d) application-service-element;e) application-protocol-data-unit;f) application-protocol-
16、control-information;g) presentation-service;h) presentation-connection;i) session-service;j) session-connection;k) transfer syntax; andl) user-element.3.2 Service conventions definitionsThis Recommendation makes use of the following terms defined in Recommendation X.210:a) service-provider;b) servic
17、e-user;c) confirmed service;d) non-confirmed service;e) provider-initiated service;f) primitive;g) request (primitive);h) indication (primitive);i) response (primitive); andj) confirm (primitive).3.3 Presentation service definitionsThis Recommendation makes use of the following terms defined in Reco
18、mmendation X.216:a) abstract syntax;b) abstract syntax name;c) presentation context.3.4 Association control definitionsThis Recommendation makes use of the following terms defined in Recommendation X.217:a) application-association; association;b) application context;c) association control service el
19、ement.4 Fascicle VIII.5 - Rec. X.2293.5 Reliable transfer definitionsThis Recommendation makes use of the following terms defined in Recommendation X.218:a) reliable transfer service element.3.6 ROSE service definitionsThis Recommendation makes use of the following terms defined in Recommendation X.
20、219:a) association-initiating-application-entity; association-initiator;b) association-responding-application-entity; association-responder;c) invoking-application-entity; invoker;d) performing-application-entity; performer;e) requestor;f) acceptor;g) linked-operations;h) parent-operation;i) child-o
21、peration;j) RO-notation;k) remote operation service element;l) ROSE-provider;m) ROSE-user;n) RTSE-user;o) remote operations.3.7 Remote operation protocol specification definitionsFor the purpose of this Recommendation the following definitions apply:3.7.1 remote-operation-protocol-machine:The protoc
22、ol machine for the remote operation service element specified in this Recommendation.3.7.2 requesting-remote-operation-protocol-machine:The remote-operation-protocol-machine whose service-user is the requestor of a particular remote operationservice element service.3.7.3 accepting-remote-operation-p
23、rotocol-machine:The remote-operation-protocol-machine whose service-user is the acceptor for a particular remote operationservice element service.4 Abbreviations4.1 Data unitsAPDU application-protocol-data-unit.Fascicle VIII.5 - Rec. X.229 54.2 Types of application-protocol-data-unitsThe following a
24、bbreviations have been given to the application-protocol-data-units defined in thisRecommendation.ROIV RO-INVOKE application-protocol-data-unitRORS RO-RESULT application-protocol-data-unitROER RO-ERROR application-protocol-data-unitRORJ RO-REJECT application-protocol-data-unit4.3 Other abbreviations
25、The following abbreviations are used in this Recommendation.AE application entiryACSE association control service elementASE application service elementRO (or ROS) remote operationsROPM remote operations protocol machineROSE remote operations service elementRT reliable transferRTSE reliable transfer
26、 service element5 ConventionsThis Recommendation employs a tabular presentation of its APDU fields. In clause 7, tables are presented foreach ROSE APDU. Each field is summarized using the following notation:M presence is mandatoryU presence is a ROSE-user optionreq source is related request primitiv
27、eind sink is related indication primitiveresp source is related response primitiveconf sink is related confirm primitivesp source or sink is the ROPMThe structure of each ROSE APDU is specified in clause 9 using the abstract syntax notation ofRecommendation X.208.6 Fascicle VIII.5 - Rec. X.2296 Over
28、view of the protocol6.1 Service provisionThe protocol specified in Recommendation provides the ROSE services defined in Recommendation X.219.These services are listed in Table 1 /X.229.TABLE 1/X.229ROSE services summaryService TypeRO-INVOKERO-RESULTRO-ERRORRO-REJECT-URO-REJECT-PNon-confirmedNon-conf
29、irmedNon-confirmedNon-confirmedProvider-initiated6.2 Use of servicesThe ROSE protocol specified in this Recommendation needs a transfer service to pass information in the formof ROSE APDUs between peer application-entities (AEs).Two transfer services may be used alternatively:a) the RTSE services, i
30、f the RTSE is included in the application-context; orb) the presentation-service, if the RTSE is not included in the application-context.In both cases, an existing application-association, established and released by means of the ACSE services, isassumed.6.2.1 Use of the RTSE servicesIf the RTSE is
31、included in the application-context, this Recommendation assumes that the ROPM is the soleuser of the RT-TRANSFER service and the RT-TURN-GIVE service.The initiating AE may only request the release of the application-association by means of the RT-CLOSEservice if it possesses the turn. Therefore the
32、 RTSE-user and the ROPM are the user of the RT-TURN-PLEASEservice.The ROPM is the user of the RT-U-ABORT and RT-P-ABORT services.6.2.2 Use of the presentation-serviceIf the RTSE is not included in the application context, the ROPM is a user of the P-DATA service.6.3 ModelThe remote-operation-protoco
33、l-machine (ROPM) communicates with its service-user by means of primitivesdefined in Recommendation X.219. Each invocation of the ROPM controls a single application-association.The ROPM is driven by ROSE service request primitives from its service-user, and by indication and confirmprimitives of the
34、 RTSE services, or the presentation-service. The ROPM, in turn, issues indication primitives to itsservice-user, and request primitives on the used RTSE services, or the presentation-service. If the RTSE is included inthe application-context, the RT-TRANSFER indication, RT-TRANSFER request and RT-TR
35、ANSFER confirmprimitives are used. In the case of an application-context excluding RTSE, the presentation-service P-DATA request,and P-DATA indication primitives are used. In this case the transfer is not confirmed.Fascicle VIII.5 - Rec. X.229 7The reception of an ROSE service primitive, or of an RT
36、SE service or of a presentation-service primitive, andthe generation of dependent actions are considered to be individual.During the exchange of APDUs, the existence of both, the association-initiating AE and the association-responding AE is presumed. How these AEs are created is beyond the scope of
37、 this Recommendation.During the execution of operations, the existence of an application-association between the peer AEs ispresumed. How this application-association is established and released is beyond the scope of this Recommendation(see Recommendations X.219, X.217, X.227, X.218 and X.228).Note
38、 - Each application-association may be identified in an end system by an internal, implementationdependent mechanism so that the ROSE service-user and the ROPM can refer to it.7 Elements of procedureThe ROSE protocol consists of the following elements of procedure:a) invocation;b) return-result;c) r
39、eturn-error;d) user-reject;e) provider-reject.In the following clauses, a summary of each of these elements of procedure is presented. This consists of asummary of the relevant APDUs, and high-level overview of the relationship between the ROSE service primitives, theAPDUs involved, and the transfer
40、 service that is used.The generic terms transfer service, transfer service-provider, transfer request, and transfer indication are usedin the context of clause 7. Clause 8 describes how these generic service primitives are mapped either on to the RTSEservices or the presentation-service.In clause 9
41、a detailed specification of the ROSE APDUs is given using the notation defined inRecommendation X.208.7.1 Invocation7.1.1 PurposeThe invocation procedure is used by one AE (the invoker) to request an operation to be performed by theother AE (the performer).7.1.2 APDUs usedThe invocation procedure us
42、es the RO-INVOKER (ROIV) APDU.The fields of the ROIV APDU are listed in Table 2/X.229.TABLE 2/X.229ROIV APDU fieldsField name Presence Source SinkInvoke-IDLinked-IDOperation-valueArgumentMUMUreqreqreqreqindindindind8 Fascicle VIII.5 - Rec. X.2297.1.3 Invocation procedureThis procedure is driven by t
43、he following events:a) an RO-INVOKE request primitive from the requestor;b) an ROIV APDU as user-data of a transfer indication primitive.7.1.3.1 RO-INVOKE request primitiveThe requesting ROPM forms an ROIV APDU from the parameter values of the RO-INVOKE requestprimitive. It issues a transfer request
44、 primitive. The user-data parameter of the transfer request primitive contains theROIV APDU.The requesting ROPM waits either for a transfer indication primitive from the transfer service-provider or anyother primitive from the requestor.7.1.3.2 ROIV APDUThe accepting ROPM receives an ROIV APDU from
45、its peer as user-data on a transfer indication primitive. Ifany of the fields of the ROIV APDU are unacceptable to this ROPM, the provider-reject procedure is performed, andno RO-INVOKE indication primitive is issued by the ROPM.If the ROIV APDU is acceptable to the accepting ROPM, it issues an RO-I
46、NVOKE indication primitive to theacceptor. The RO-INVOKE indication primitive parameters are derived from the ROIV APDU.The accepting ROPM waits either for a transfer indication primitive from the transfer service-provider or anyother primitive from the acceptor.7.1.4 Use of the ROIV APDU fieldsThe
47、ROIV fields are used as follows.7.1.4.1 Invoke-IDThis is the Invoke-ID parameter value of the RO-INVOKE request primitive. lt appears as the Invoke-IDparameter value of the RO-INVOKE indication primitive.The value of this field is transparent to the ROPM, however the value may be used in the provide
48、r rejectprocedure.7.1.4.2 Linked-IDThis is the Linked-ID parameter value of the RO-INVOKE request primitive. It appears as the Linked-IDparameter value of the RO-INVOKE indication primitive.The value of this field is transparent to the ROPM.7.1.4.3 Operation-valueThis is the Operation-value paramete
49、r value of the RO-INVOKE request primitive. lt appears as theOperation-value parameter value of the RO-INVOKE indication primitive.The value of this field is transparent to the ROPM.7.1.4.4 ArgumentThis is the Argument parameter value of the RO-INVOKE request primitive. It appears as the Argumentparameter value of the RO-INVOKE indication primitive.The value of this field is transparent to the ROPM.Fascicle VIII.5 - Rec. X.229 97.2 Return-result7.2.1 PurposeThe return-result procedure is used by one AE (the performer) to request the transfer of the result of asuccessfully perf
