ISO 25111:2009 PDF
Intelligent transport systems — Communications access for land mobiles (CALM) — General requirements for using public networks
Intelligent transport systems — Communications access for land mobiles (CALM) — General requirements for using public networks
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 17
- Дата публикации:
- 30 октября 2009 г.
- Издание:
- ISO IS 25111 edition 1 version 1
- ICS:
- 03.220.01
ISO 25111:2009 specifies general requirements for the provision of ITS services, using the CALM architecture and protocols, via the use of public wireless networks [including cellular telephony and mobile wireless broadband (MWB) systems]. In particular, ISO 25111:2009 specifies protocols and parameters that public wireless networks shall include to support prolonged communication links in ITS environments where heterogeneous handovers or media independent handovers (MIH) are either necessary to maintain the link, or desirable as determined by media selection policies, and such handover is provided by the public wireless network. The requirements for the use of CALM via public wireless networks where there is no provision for heterogeneous cell/cell handover (i.e. so-called nomadic services) is not the central focus of ISO 25111:2009, but general requirements to enable the use of such systems, within the limits of the range of a single cell, are also provided. Wherever practicable, ISO 25111:2009 has been developed by reference to suitable extant standards, adopted by selection. Required regional variations are provided. Specifically, for ISO 25111:2009, extant national and International Standards for public wireless networks are adopted by reference and are not redefined herein. Application-specific upper layers are not included in ISO 25111:2009, but will be driven by application standards (which might not be technology specific).
Abstract
Overview
ISO 25111:2009 - "Intelligent transport systems (ITS) - Communications access for land mobiles (CALM) - General requirements for using public networks" - defines general requirements for delivering ITS services over public wireless networks (cellular telephony, mobile wireless broadband/MWB, satellite). The standard focuses on how the CALM architecture and protocols must interact with public networks to support prolonged, quasi-continuous communications in mobile environments, including support for media independent handover (MIH) and heterogeneous handovers.
Key topics and technical requirements
- Scope: Applies to ITS services using CALM via public wireless networks; nomadic (single-cell, no handover) scenarios are not the central focus but are covered in limited form.
- Handover support: Specifies protocols and parameters public wireless networks shall provide to enable heterogeneous handovers / MIH to maintain sessions across different media and service providers.
- Session models: Distinguishes continuous (quasi-continuous sessions established at engine start and maintained) and time-controlled sessions, and describes their communication sequence implications.
- Conformance: Claims of compliance require adherence to CALM component standards - notably ISO 21210 (CALM IPv6 networking), ISO 21217 (CALM architecture), ISO 21218 (medium service access points) and ISO 24102 (CALM management) - and to applicable public wireless network standards adopted by reference.
- Re-use of extant standards: Wherever practicable, ISO 25111 adopts existing national and international public wireless network standards by reference rather than redefining them.
- Protocol boundaries: Application-specific upper layers are excluded; ISO 25111 covers lower- and mid-layer requirements needed to support ITS applications over public networks.
Practical applications and users
Who uses ISO 25111:
- ITS system architects and network engineers designing vehicle-to-infrastructure and vehicle-to-service communications that rely on public cellular or broadband networks.
- Mobile network operators and service providers implementing support for handover features, QoS parameters and protocols required by ITS applications.
- Automotive OEMs and suppliers of on-board equipment (OBE) implementing CALM-compliant communication stacks for infotainment, safety messaging, traffic management, probe data uploads, map/firmware updates and multimedia services. Practical benefits:
- Enables quasi-continuous data sessions for long-duration services (telemetry, video downloads, safety messaging).
- Provides a framework to integrate multiple air interfaces (2G/3G, LTE/MWB, WiMAX, DSRC/WAVE, IEEE 802.11 variants, millimetre wave, infrared) under the CALM MIH concept.
- Helps ensure interoperability between vehicle on-board systems and public wireless networks.
Related standards
- ISO 21210 - CALM IPv6 networking
- ISO 21217 - CALM system architecture
- ISO 21218 - CALM medium service access points
- ISO 24102 - CALM management
- Medium-specific CALM standards (e.g., ISO 21214/21215/21216) for infrared, 5 GHz and millimetre-wave media
Keywords: ISO 25111:2009, CALM, Intelligent Transport Systems, public wireless networks, media independent handover, MIH, ITS services, continuous sessions, heterogeneous handover.
Технические детали
- Технический комитет
- ISO/TC 204 - Intelligent transport systems
- SKU
- ISO 25111:2009
Похожие стандарты
Стандарты, упомянутые в описании
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