ISO 15662:2006 高度道路交通システム—広域通信—プロトコル管理情報 | ページ 2

Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.

International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.

The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights.

ISO 15662 was prepared by Technical Committee ISO/TC 204, Intelligent transport systems.

Introduction

Most of the application services in the ITS sector use a variety of wide area communication systems in order to connect user terminals and “Service Centres”. In addition, the application services that are currently being provided connect specific user terminals to specific service centres using specific wide area communications systems. In other words, the various conditions that must be established to provide services are fixed. However, when the future modes of service use are considered, it is assumed that a user will utilize the same terminal to access “Service Centre A” in some cases and “Service Centre B” in other cases. It can also be assumed that in some cases the user may be on foot and in others he or she may be travelling in a vehicle. It can also be assumed that some users may access the service centre from “smart phones”, while others may do so from navigation systems, while still others may do so using interactive TVs.

When a variety of user terminals use a variety of wide area communications systems to connect to a variety of service centres in this manner, the type and content of the conditions that must be established will differ for each individual service usage. In order to provide appropriate service based on these conditions, it is crucial to establish a mechanism by which the type of conditions and the content established for them are transmitted to an appropriate entity and interpreted.

This International Standard summarizes information as a checklist to consider internal processing in communication systems, terminals and so forth (“protocol management information”) suitable for providing ITS application services utilizing wide area communication systems.

1 Scope

This International Standard provides information as a checklist to consider handling messages that are defined by the application working groups of ISO/TC 204, installing systems and selecting suitable wide area communication systems for providing ITS application services.

The usages of this information are for frameworks of message headers, pay load items for initializing communication links, checklists for system design and so on. Thus, these information items are not necessarily contained in message instances and/or headers that are actually transmitted.

For example, this information is used to organize the characteristics of messages such as those requesting hand-over based on the relationship between the size of the information service area and the communication range of each communication system (see Figure 1).

2 Normative references

The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 14817 and the following apply.

Bibliography