App downloads completed in 20 3 270 billion app downloads expected in 2017. Comparison 1g 2g 3g 4g 5g period 1980 1990 1990 2000 2000 2010 2010 2020 2020 2030 bandwidth 150900mhz 900mhz 100mhz 100mhz x bw pr. Architecture sra specification 3 providing a framework. A functional representation of 3g network architecture is. Appreciating the magic of mobile requires understanding the evolution from 1g to 4g lte. Below is a brief description of each of the components shown in the above architecture. This keeps information about the users phone number, home network identity and security keys etc. Requirements, process and architecture vangelis gazis, nikos houssos, nancy alonistioti, lazaros merakos. Supported by overtheair download of required system software anor firmware, reconfigurability possesses a huge. Named as lte long term evolution, the 4g system architecture is made up of an epc evolved packet core. The home subscriber server hss component has been carried forward from umts and gsm and is a central database that contains information about all the network operators subscribers. Lte architecture in easiest way in hindi 4g architecture.
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