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BS EN 15531-1:2015

Superseded

Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

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Public transport. Service interface for real-time information relating to public transport operations Context and framework

Available format(s)

Hardcopy , PDF

Superseded date

05-09-2022

Language(s)

English

Published date

31-08-2015

Committee
EPL/278
DevelopmentNote
Supersedes DD CEN/TS 15531-1 & 13/30285295 DC. (09/2015)
DocumentType
Standard
Pages
98
PublisherName
British Standards Institution
Status
Superseded
SupersededBy
Supersedes
UnderRevision

1.1 Interfaces specified by this standard 1.1.1 Business context Real-time information may be exchanged between a number of different organizations, or between different systems belonging to the same organization. Key interfaces include the following: - Between public transport vehicle control centres – generally, for fleet and network management. - Between a control centre and an information provision system – generally, to provide operational information for presentation to the public. - Between information provision systems – generally, sharing information to ensure that publicly available information is complete and comprehensive. - Between information provision systems – and data aggregation systems that collect and integrate data from many different sources and different types of data supplier and then distribute it onwards. - Between information provision systems and passenger information devices such as mobile phones, web browsers, etc. Annex B describes the business context for SIRI in more detail. SIRI is intended for wide scale, distributed deployment by a wide variety of installations. In such circumstances it is often not practical to upgrade all the systems at the same time. SIRI therefore includes a formal versioning system that allows for the concurrent operation of different levels at the same time and a disciplined upgrade process. In this general framework, SIRI defines a specific set of concrete functional services. The services separate the communication protocols from the message content (‘functional services’). This allows the same functional content to be exchanged using different transport mechanisms, and different patterns of exchange. Figure 1 below shows this diagrammatically. 1.1.2 SIRI communications SIRI provides a coherent set of functional services for exchanging data for different aspects of PT operation. A common data model, based on Transmodel 5.1, is used across all services. A communication layer defines common procedures for the requesting and exchanging of data. Within SIRI, the same general communication protocols are used for all the different concrete functional interfaces, and specify a common infrastructure for message referencing, error handling, reset behaviour and so forth. The communications layer is defined in Part 2 of the SIRI document set. To allow the most efficient use to be made of bandwidth and processing capacity, the SIRI communications architecture supports several different patterns of interaction. SIRI supports both request/response and publish/subscribe protocols between servers, allowing applications both to pull or to push data. The SIRI publish/subscribe pattern of interaction follows the paradigm described in the W3C candidate standard ‘Publish-Subscribe Notification for Web Services (WS-PubSub)’. SIRI uses the same separation of concerns, and a similar terminology for Publish/Subscribe concepts as is used in WS-PubSub. For the delivery of data in response to both requests and subscriptions, SIRI supports two common patterns of message exchange as realised in existent national systems: - one-step ‘direct’ delivery: allowing the simple rapid delivery of data; - two-step ‘fetched’ delivery: allowing a more optimised use of limited resources. 1.1.3 SIRI functional services SIRI provides specific protocols for the following functional services, defined in Part 3 of the SIRI document set: - Production Timetable (PT) Service: to send daily information on the operational timetable and associated vehicle running information. - Estimated Timetable (ET) Service: to send real-time information on timetable, including changes based on the production service and on actual running conditions. - Stop Timetable (ST) Service: to provide a stop-centric view of timetabled vehicle arrivals and departures at a designated stop. - Stop Monitoring (SM) Service: to send real-time arrival & departure information relating to a specific stop.

Standards Relationship
EN 15531-1:2015 Identical

ISO 639-1:2002 Codes for the representation of names of languages — Part 1: Alpha-2 code
EN 28701:2012 Intelligent transport systems - Public transport - Identification of Fixed Objects in Public Transport (IFOPT)
ISO 639:1988 Code for the representation of names of languages
ISO/IEC 8859-15:1999 Information technology 8-bit single-byte coded graphic character sets Part 15: Latin alphabet No. 9
CEN/TS 16614-1:2014 PUBLIC TRANSPORT - NETWORK AND TIMETABLE EXCHANGE (NETEX) - PART 1: PUBLIC TRANSPORT NETWORK TOPOLOGY EXCHANGE FORMAT
ISO/IEC 19501:2005 Information technology — Open Distributed Processing — Unified Modeling Language (UML) Version 1.4.2
ISO 8601:2004 Data elements and interchange formats Information interchange Representation of dates and times
ENV 13998:2001 ROAD TRANSPORT AND TRAFFIC TELEMATICS - PUBLIC TRANSPORT - NON-INTERACTIVE DYNAMIC PASSENGER INFORMATION ON GROUND
EN 12896:2006 Road transport and traffic telematics - Public transport - Reference data model
SAE J 1939/71 : 2016 VEHICLE APPLICATION LAYER
CEN/TS 13149-6:2005 PUBLIC TRANSPORT - ROAD VEHICLE SCHEDULING AND CONTROL SYSTEMS - PART 6: CAN MESSAGE CONTENT

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