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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
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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.
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GMR-2: Which is not an evolution of GMR-1 but rather a concurrent standard that has been developed by another group of companies.
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50:-family terrestrial digital cellular standards and supports access to GSM/UMTS core networks. It is used by
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GMPRS (GEO-Mobile Packet Radio
Service): Adding support for packet data. The equivalent of GPRS in the
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have a radically different air-interface, GMR-1 3G is still very similar to GMR-1 on the Layer 1 side.
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GMR-2 - GEO mobile radio 2 (InmarSat iSatPhonePro). Based on byte operations and 2 S-Boxes from DES.
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GMR-1: The first version of the standard and that has evolved over time into 3 different revisions:
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211:"Don't trust satellite phones – The GMR-1 and GMR-2 ciphers have been broken"
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GMR-1: The basic circuit switched model, more or less corresponding to what
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Don’t trust satellite phones – The GMR-1 and GMR-2 ciphers have been broken
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There are two widely deployed variants of GMR, both heavily modeled after
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Phase 2 is, and using exactly the same core network infrastructure.
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GMR-1 - GEO mobile radio 1 (Thuraya). Based on 4 LFSR registers.
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International
Journal of Satellite Communications and Networking
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Chini, Paolo (2009). "A survey on mobile satellite systems".
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world. Still connected to a 'Gb' style core network.
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46:. The GMR standard is derived from the
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130:Versions of standard and cipher used:
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122:GMR was developed by TIA and ETSI.
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260:ETSI Publications Download Area
221:from the original on 2023-09-23
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215:Cryptanalysis – breaking news
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293:. You can help Knowledge by
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28:GEO-Mobile Radio Interface
209:Tews, Erik (2012-02-02).
32:Geostationary Earth Orbit
350:Telecommunications stubs
285:This article related to
126:Air Interface Ciphers
345:Satellite telephony
34:), better known as
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248:2016-03-03 at the
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142:References
179:: 29–57.
68:TerreStar
246:Archived
219:Archived
193:40203171
64:SkyTerra
60:Inmarsat
38:, is an
243:Creonic
72:Thuraya
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289:is a
189:S2CID
18:GMPRS
340:ETSI
291:stub
255:ETSI
106:and
104:UMTS
70:and
52:ACeS
48:3GPP
40:ETSI
181:doi
108:GSM
96:GSM
89:GSM
79:GSM
56:ICO
36:GMR
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