There are two widely deployed variants of GMR, both heavily modeled after GSM
GMR-1: The first version of the standard and that has evolved over time into 3 different revisions:
GMR-1: The basic circuit switched model, more or less corresponding to what GSM Phase 2 is, and using exactly the same core network infrastructure.
GMPRS (GEO-Mobile Packet Radio Service): Adding support for packet data. The equivalent of GPRS in the GSM world. Still connected to a 'Gb' style core network.
GMR-1 3G: Adds support for some new channel types, but the most important changes are in the core network, adding interoperability with UMTS core network components. Contrary to the classic cell network where UMTS and GSM have a radically different air-interface, GMR-1 3G is still very similar to GMR-1 on the Layer 1 side.
GMR-2: Which is not an evolution of GMR-1 but rather a concurrent standard that has been developed by another group of companies.
GMR-1 is the technology used by Thuraya. GMR-1 3G is the technology used for TerreStar and SkyTerra. GMR-2 is used by Inmarsat iSatPhonePro.
^Chini, Paolo (2009). "A survey on mobile satellite systems". International Journal of Satellite Communications and Networking. 28: 29–57. doi:10.1002/sat.941. S2CID 40203171.
^ abTews, Erik (2012-02-02). "Don't trust satellite phones – The GMR-1 and GMR-2 ciphers have been broken". Cryptanalysis – breaking news. Archived from the original on 2023-09-23.
External linksedit
Creonic
ETSI
ETSI Publications Download Area
Don’t trust satellite phones – The GMR-1 and GMR-2 ciphers have been broken
This article related to telecommunications is a stub. You can help Wikipedia by expanding it.
mobile, radio, interface, stands, geostationary, earth, orbit, better, known, etsi, standard, satellite, phones, standard, derived, from, 3gpp, family, terrestrial, digital, cellular, standards, supports, access, umts, core, networks, used, aces, inmarsat, sky. GEO Mobile Radio Interface GEO stands for Geostationary Earth Orbit better known as GMR is an ETSI standard for satellite phones The GMR standard is derived from the 3GPP family terrestrial digital cellular standards and supports access to GSM UMTS core networks It is used by ACeS ICO Inmarsat SkyTerra TerreStar and Thuraya 1 There are two widely deployed variants of GMR both heavily modeled after GSM GMR 1 The first version of the standard and that has evolved over time into 3 different revisions GMR 1 The basic circuit switched model more or less corresponding to what GSM Phase 2 is and using exactly the same core network infrastructure GMPRS GEO Mobile Packet Radio Service Adding support for packet data The equivalent of GPRS in the GSM world Still connected to a Gb style core network GMR 1 3G Adds support for some new channel types but the most important changes are in the core network adding interoperability with UMTS core network components Contrary to the classic cell network where UMTS and GSM have a radically different air interface GMR 1 3G is still very similar to GMR 1 on the Layer 1 side GMR 2 Which is not an evolution of GMR 1 but rather a concurrent standard that has been developed by another group of companies GMR 1 is the technology used by Thuraya GMR 1 3G is the technology used for TerreStar and SkyTerra GMR 2 is used by Inmarsat iSatPhonePro GMR was developed by TIA and ETSI 1 Air Interface Ciphers editVersions of standard and cipher used 1 2 GMR 1 GEO mobile radio 1 Thuraya Based on 4 LFSR registers 3 GMR 2 GEO mobile radio 2 InmarSat iSatPhonePro Based on byte operations and 2 S Boxes from DES 3 References edit a b c IEEE Xplore Chini Paolo 2009 A survey on mobile satellite systems International Journal of Satellite Communications and Networking 28 29 57 doi 10 1002 sat 941 S2CID 40203171 a b Tews Erik 2012 02 02 Don t trust satellite phones The GMR 1 and GMR 2 ciphers have been broken Cryptanalysis breaking news Archived from the original on 2023 09 23 External links editCreonic ETSI ETSI Publications Download Area Don t trust satellite phones The GMR 1 and GMR 2 ciphers have been broken nbsp This article related to telecommunications is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title GEO Mobile Radio Interface amp oldid 1190070542, wikipedia, wiki, book, books, library,
