This International Standard provides definitions and procedures for the establishment, maintenance and termination of an ITS (intelligent transport systems) communications session within a CALM (communication access for land mobiles) system environment using bi-directional satellite communications.<\/p>\n
It defines the operation of the medium management adaptation entity (MMAE), which provides the management interface between a proprietary satellite communications medium and the \u201cITS station management\u201d. This enables the \u201cITS station management\u201d to know the status of the communications medium and control the interface without the need for applications at the ITS station to have any knowledge of the satellite communications interface. The procedures that the \u201cITS station management\u201d expects to use are also explained.<\/p>\n
\nNOTE 1 CALM links are required for quasi-continuous, prolonged and short-duration communications between vehicles and the roadside, between vehicles, and between mobile equipment and fixed infrastructure points, over medium and long ranges.<\/p>\n<\/blockquote>\n
This International Standard defines how to connect and disconnect a communication session using satellite communication systems in the context of an application operated within the environment defined in ISO 21217. It supports peer-to-peer modes of communication. Support for broadcast satellite systems is defined in ISO 13183, which provides a common approach for all broadcast media. It supports satellite communications networks that are interconnected with the public network, as well as those which connect via the internet and those which provide a stand-alone capability.<\/p>\n
\nNOTE 2 As there are multiple instantiations of satellite systems, most of which are not interoperable, there is the possibility of several simultaneous satellite sessions, each forming a separate CALM medium (although the differences may only be in software within the on-board equipment).<\/p>\n<\/blockquote>\n
Wherever practicable, this International Standard has been developed by reference to suitable existing standards, adopted by selection. Application-specific upper layers are not included, but will be driven by application standards (which may not be technology-specific).<\/p>\n
PDF Catalog<\/h4>\n
\n
\n PDF Pages<\/th>\n PDF Title<\/th>\n<\/tr>\n \n 6<\/td>\n Foreword <\/td>\n<\/tr>\n \n 7<\/td>\n Introduction <\/td>\n<\/tr>\n \n 9<\/td>\n 1\tScope
2\tConformance
3\tNormative references <\/td>\n<\/tr>\n\n 10<\/td>\n 4\tTerms and definitions
5\tAbbreviated terms <\/td>\n<\/tr>\n\n 11<\/td>\n 6\tBackground
6.1\tProprietary connectivity protocols <\/td>\n<\/tr>\n\n 13<\/td>\n 6.2\tInternet connectivity
7\tRequirements
7.1\tGeneral <\/td>\n<\/tr>\n\n 14<\/td>\n 7.2\tAdoption of satellite standards and internationally adopted practices
7.3\tCALM architecture and application grouping
7.4\tCALM networking protocols
7.5\tCALM medium service access points
7.6\tCALM \u201cITS station management\u201d <\/td>\n<\/tr>\n\n 15<\/td>\n 7.7\tCALM using public wireless networks
7.8\tEstablishment and termination of medium specific sessions
7.9\tInterface medium management
8\tMedium access control (MAC)
8.1\tConformance
8.2\tCALM satellite communications MMAE service primitives <\/td>\n<\/tr>\n\n 16<\/td>\n 8.3\tSatellite communication MMAE <\/td>\n<\/tr>\n \n 18<\/td>\n 8.4\tCALM session connection
8.5\tCALM session disconnection
8.6\tChange of satellite communications connection state <\/td>\n<\/tr>\n\n 19<\/td>\n 8.7\tRetrieval of medium status
8.8\tSatellite communications specific connection aspects <\/td>\n<\/tr>\n\n 20<\/td>\n 8.9\tSatellite communications session disconnection
9\tTest and conformance requirements
10\tDeclaration of patents and intellectual property <\/td>\n<\/tr>\n\n 21<\/td>\n Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Intelligent transport systems. Communications access for land mobiles (CALM). Satellite networks<\/b><\/p>\n
\n\n
\n Published By<\/td>\n Publication Date<\/td>\n Number of Pages<\/td>\n<\/tr>\n \n BSI<\/b><\/a><\/td>\n 2011<\/td>\n 24<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":230659,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[107,2641],"product_tag":[],"class_list":{"0":"post-230655","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-03-220-01","7":"product_cat-bsi","9":"first","10":"instock","11":"sold-individually","12":"shipping-taxable","13":"purchasable","14":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/230655","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/230659"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=230655"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=230655"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=230655"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}