標準號：BS DD CEN/TS 15531-5-2011
中文標準名稱：公共運輸.公共運輸操作相關的實時信息服務接口.功能服務接口.位置交換
英文標準名稱：Public transport. Service interface for real-time information relating to public transport operations. Functional service interfaces. Situation exchange
標準類型：R85
發布日期：2011/8/31 12:00:00
實施日期：2011/8/31 12:00:00
中國標準分類號：R85
國際標準分類號：35.240.60
引用標準：CEN/TS 15531-1-2007
適用范圍：The SIRI Situation Exchange service (SIRI-SX) allows the efficient exchange of data about situations causedby planned and unplanned incidents and events and is intended to support the use cases identified inAnnex C. Situations are actual or potential perturbations to normal operation of a transport network. The SIRISXservice uses the common SIRI communication framework and services which are described inCEN/TS 15531-1 and not repeated in this document.The Situation Exchange service has a rich Situation model, allowing a structured description of all aspects ofmultimodal travel Situations, including cause, scope, effect and rules for distribution to an audience. Thestructured values enabling computer based distribution through a wide variety of channels, and thepresentation of data in different formats for different device and different audiences. The Situation ExchangeService allows the exchange of incident and event information between, amongst others:Control centres;Operations staff;Public information systems;Alert systems and personalised alert systems;UTMC systems;Journey planners;AVMS (Automatic Vehicle Management Systems).SIR-SX uses a network model based on the CEN Transmodel conceptual model for public transport networks,schedules and operations, along with the CEN Identification of Fixed Objects in Public Transport (IFOPT)model for describing physical transport interchanges.The Situation Exchange service is envisaged as a 'back office' capture and exchange service that will feedother public facing travel information dissemination systems, in particular those using the TPEG format.Transport Protocol Expert Group (TPEG) is a European Broadcasting Union fostered standard forbroadcasting travel data over Digital Assisted Broadcasting (DAB) radio and other channels. To this end, theSIRI-SX situation classification model has been harmonised as far as possible with that of TPEG and DATEX2so that full interoperability can be achieved. Uses of structured elements from TPEG, for which translationsalready exist in most European languages, also facilitates human readability in different national languages.Maintaining and improving a harmonisation with TPEG will be a continuing objective. In addition to the TPEGexchangeable content, SIRI-SX messages contain additional structured information which allows them to beprocessed in additional ways.Situation and computer systems and applications are typically distributed, that is information will be capturedon one system and exchanged with others for dissemination and further processing. This means that amessage design is needed that allows the management of the identity of distributed messages over time andacross different systems, so that subsequent updates to a Situation can be reconciled by different systemsover a network, and obsolete messages can be retired automatically. The SIRI-SX situation model is designedto support the distributed management of Situations.