Communications access for land mobiles (CALM)[1] is an initiative by the ISO TC 204/Working Group 16 to define a set of wireless communication protocols and air interfaces for a variety of communication scenarios spanning multiple modes of communications and multiple methods of transmissions in Intelligent Transportation System (ITS). The CALM architecture is based on an IPv6 convergence layer that decouples applications from the communication infrastructure. A standardized set of air interface protocols is provided for the best use of resources available for short, medium and long-range, safety critical communications, using one or more of several media, with multipoint (mesh) transfer.
Since 2007 CALM stands for Communication Access for Land Mobile, before that year, CALM stood for Communications, Air-interface, Long and Medium range.
Vehicle-to-Infrastructure (V2I): communication initiated by either roadside or vehicle (e.g. petrol forecourt or toll booth)
Vehicle-to-Vehicle (V2V): peer to peer ad hoc networking amongst fast moving objects following the idea of MANET's/VANET's.
Infrastructure-to-Infrastructure (I2I): point-to-point connection where conventional cabling is undesirable (e.g. using lamp posts or street signs to relay signals)
Methods of transmission used by CALM may be based on one or more of the following communication media:
The CALM architecture provides an abstraction layer for vehicle applications, managing communication for multiple concurrent sessions spanning all communications modes, and all methods of transmission.
Applicationsedit
Applications for CALM are likely to include in-vehicle internet access, dynamic navigation, safety warnings, collision avoidance, and ad hoc networks linking multiple vehicles.
Securityedit
The CALM architecture protects critical in-vehicle communication using a firewall controlled by the vehicle. Parental controls are also being considered as a component of the architecture.
Implementationsedit
The CALM standard is still work in progress. Therefore, large scale implementations of the standard do not yet exist. CVIS [2] is a project funded by the EC in the sixth framework program (FP6). The aim of the project is to develop and implement a communication infrastructure based on the CALM architecture. CVIS will implement CALM M5, 2G/3G and IR as communication media. The implementation will be tested at several test locations across Europe with a wide range of ITS applications.
communications, access, land, mobiles, communications, access, land, mobiles, calm, initiative, working, group, define, wireless, communication, protocols, interfaces, variety, communication, scenarios, spanning, multiple, modes, communications, multiple, meth. Communications access for land mobiles CALM 1 is an initiative by the ISO TC 204 Working Group 16 to define a set of wireless communication protocols and air interfaces for a variety of communication scenarios spanning multiple modes of communications and multiple methods of transmissions in Intelligent Transportation System ITS The CALM architecture is based on an IPv6 convergence layer that decouples applications from the communication infrastructure A standardized set of air interface protocols is provided for the best use of resources available for short medium and long range safety critical communications using one or more of several media with multipoint mesh transfer Since 2007 CALM stands for Communication Access for Land Mobile before that year CALM stood for Communications Air interface Long and Medium range Contents 1 Communication Modes 2 Applications 3 Security 4 Implementations 5 External links 6 ReferencesCommunication Modes editCALM enables the following communication modes Vehicle to Infrastructure V2I communication initiated by either roadside or vehicle e g petrol forecourt or toll booth Vehicle to Vehicle V2V peer to peer ad hoc networking amongst fast moving objects following the idea of MANET s VANET s Infrastructure to Infrastructure I2I point to point connection where conventional cabling is undesirable e g using lamp posts or street signs to relay signals Methods of transmission used by CALM may be based on one or more of the following communication media Infrared GSM 2G 3G cellular telephone communication technology DSRC 5 8 5 9 GHz legacy systems Various evolutions of the IEEE 802 11 standard including WAVE IEEE P1609 3 D23 M5 ISO 21215 WiMAX IEEE 802 16e MM wave 63 GHz Satellite Bluetooth RFID The CALM architecture provides an abstraction layer for vehicle applications managing communication for multiple concurrent sessions spanning all communications modes and all methods of transmission Applications editApplications for CALM are likely to include in vehicle internet access dynamic navigation safety warnings collision avoidance and ad hoc networks linking multiple vehicles Security editThe CALM architecture protects critical in vehicle communication using a firewall controlled by the vehicle Parental controls are also being considered as a component of the architecture Implementations editThe CALM standard is still work in progress Therefore large scale implementations of the standard do not yet exist CVIS 2 is a project funded by the EC in the sixth framework program FP6 The aim of the project is to develop and implement a communication infrastructure based on the CALM architecture CVIS will implement CALM M5 2G 3G and IR as communication media The implementation will be tested at several test locations across Europe with a wide range of ITS applications External links edithttp www safespot eu org SAFESPOT EU Integrated Project on Cooperative Vehicular Systems for Road Safety http hal inria fr inria 00419466 fr Architecture Pour Communication Vehicules InfrastructureReferences edit Iso Tc204 Wg16 Calm Archived from the original on 2011 07 15 Retrieved 2010 03 02 http www cvisproject org CVIS project Retrieved from https en wikipedia org w index php title Communications Access for Land Mobiles amp oldid 1106241171, wikipedia, wiki, book, books, library,
