What are the differences between 1G, 2G, 3G, 4G and 5G? 1G = analog Examples include NMT, AMPS, TACS, etc This did not do data. 2G = digital, voice Examples include GSM, D-AMPS, PDC 2.5G added data (GPRS) 2.75G faster data (EDGE) Data rates from 9.6Kbps (GPRS) to 200Kbps (2.75G) 3G = digital, supported data, but still circuit switched WCDMA, EvDO Includes data but still onto circuit switched architecture 3.5G faster data, added true always-on / packet data (HSPA) Data rates of 2Mbps-tens of Mbps NB The USA and few other places had a rival technology ("CDMA"). IS95, EvDO. That was marketed as 3G when it was launched, but initially was probably closer to 2.5G and then upgraded to 3G with the EvDO upgraded. 4G = wireless broadband OFDMA, flat architecture, true packet switched Pure data: voice as VoIP (VoLTE) Most people say this is LTE & WiMAX, (though some people are waiting for an upgrade to LTE-A, based on a rather silly data rate definit...
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Showing posts from September, 2016