BS EN ISO 18750:2018,Intelligent transport systems — Co-operative ITS — Local dynamic map.BS EN ISO 18750:2018 pdf free download.
An essential property of cooperative intelligent transport systems (C-ITS),see ISO TR 17465-1, is the sharing of data between different ITS applications providing different ITS services to the users.
This approach replaces the traditional approach where each application is operated in an isolated environment, i.e. referred to as”silo-approach”.The C-ITS approach enables synergies in components of an ITS station unit, e.g. sharing of communication tools, improves overall performance and reliability,and reduces overall cost. In order to protect the interests of the various ITS applications, C-ITS implements the concept of an ITS station operated as a bounded secured managed domain.
The sharing of data between applications is achieved by subscribe/publish mechanisms, where at least two mechanisms are distinguished, i.e. one allowing ITS-S application processes to subscribe to standardized messages from ITS message sets (direct forwarding upon reception of such messages in an ITS station unit ),and one using a local dynamic map (LDM) as repository of standardized data objects.
BS EN ISO 18750:2018 introduces the usage of LDMs, and specifies the LDM for global usage in C-ITS.
Initial implementations of LDMs were in the EU research projects CVISH and Safespot.
This document:
— describes the functionality of a “Local Dynamic Map” (LDM) in the context of the “Bounded Secured Managed Domain” (BSMD);
— specifies:
— general characteristics of LDM Data Objects (LDM-DOs) that may be stored in an LDM, i.e. information on real objects such as vehicles, road works sections, slow traffic sections, special weather condition sections, etc. which are as a minimum requirement location-referenced and time-referenced;
— service access point functions providing interfaces in an ITS station (ITS-S) to access an LDM for:
— secure add, update and delete access for ITS-S application processes;
— secure read access (query) for ITS-S application processes;
— secure notifications (upon subscription) to ITS-S application processes;
— management access:
— secure registration, de-registration and revocation of ITS-S application processes at LDM;
— secure subscription and cancellation of subscriptions of ITS-S application processes;
— procedures in an LDM considering:
— means to maintain the content and integrity of the data store;
— mechanisms supporting several LDMs in a single ITS station unit.
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