GB/T 15128-2008Information technology -- Open systems interconnection -- Session service definition (English PDF)

1 Scope 1

2 Normative references 1

3 Terms and definitions

3.1 Reference model definitions 1

3.2 Service conventions definitions 2

3.3 Session service definition 2

4 Abbreviations 3

4.1 Data unit 3

4.2 Other 3

4.3 Service variable 3

5 Conventions 4

6 Session Service Model 4

6.1 Layer Service Model 4 6.2 session connectionless mode transmission model 4

7 Summary of Session Service 4

7.1 Summary 4

7.2 Token concept 4

7.3 Synchronization and dialogue unit concepts 5

7.4 Activity concept 5 7.5 resynchronization 6

7.6 Consultative 6

7.7 nested session connection 6

8 Stage, sessions service and service 7

8.1 Session connection establishment phase 7

8.2 Data transfer phase 7

8.3 Session connection release phase 8

9 Functional units and subsets 9

Function unit 9 9.1

9.2 subset 11

10 session quality of service (QOS) 11

10.1 QOS determination 11

Introduction

This standard is one of a set of standards in order to facilitate the development of computer systems interconnection.

It is a set of standards and open systems interconnection (OSI) reference model as defined by other standards related. OSI reference model to interconnect standard Normalized range subdivided into a series of manageable size specification layer.

The purpose of this standard is on the boundary of the session layer and the presentation layer reference model between the provision of services to the presentation layer is defined. meeting Then use the transport layer protocol services to provide session services. This standard also defines the protocol can take advantage of the characteristics of the session services. Figure 1 it illustrates the relationship between session service, session protocol, transport services and representation agreements between each standard.

Diagram 1 OSI standards and other standards About session quality of service of this standard as described in Chapter 10, to recognize that, in order to pass through the Open Systems Interconnection (OSI) Reference Model Session quality of service of a comprehensive treatment of all layers, and each layer to ensure that their treatment and services to achieve the quality of services by a uniform manner (QOS) of the overall goal of the work is still in progress. Therefore, the future can add a Supplement to this standard, further reflecting the service Quality and comprehensive development.

GB/T 15128-2008/ISO/IEC 8326:1996 Information technology - OSI Session service definition the first chapter outlines

1 Scope

This standard uses the following terms and abstract methods defined externally visible service provided by the OSI Session Layer.

Primitive actions and events a) service;

b) the parameter data with each primitive action and event associated;

c) the relationship between the primitive actions and events and effective order.

Service as defined in this standard is provided by the OSI session protocol (along with transport services), and can be used in OSI presentation protocol that these services.

This standard does not specify individual implementations or products, nor be limited to the achievement of entities and interfaces within a computer system, therefore, does not exist in conformance requirements of this standard.

Symmetric synchronize functional unit related to the text does not apply to ITU-T application support.

2 Normative references the following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.

GB/T 9387.1-1998 Information technology - Open Systems Interconnection - Basic Reference Model - Part 1. Basic Model (Idt ISO/IEC 7498-1:1994) GB/T 9387.3-2008 Information technology - Open Systems Interconnection - Basic Reference Model - Part 3. Naming and addressing (ISO/IEC 7498-3:1997, IDT) GB/T 12453-2008 Information technology - Open Systems Interconnection - Transport service definition (ISO/IEC 8072:1996, IDT) GB/T 17967-2000 Information technology - Open Systems Interconnection - Basic Reference Model. OSI service definition conventions (Idt ISO/IEC 10731:1994) ISO/IEC 8327-1:1996 Information technology - Open Systems Interconnection - Connection-oriented session protocol. Protocol specification ISO/IEC 9548-1:1995 Information technology - OSI Connectionless session protocol. Protocol specification ITU Recommendation X. 225/Add. 1 (1995) OSI session layer protocol specification with enhanced efficiency

3 Terms and Definitions the following terms and definitions apply to this standard.

Note. The use of this chapter as defined in Chapter 4 defined abbreviations.

3.1 Reference model definitions the concept of this standard to GB/T 9387.1 proposed based and uses the following terms defined therein.

a) accelerate the session service data unit (expedited-session-service-data-unit);

b) session connection (session-connection);

c) Session Layer (SessionLayer);

GB/T 15128-2008/ISO/IEC 8326:1996