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Based on the similar functions performed, one can compare the different network elements of a GSM, UMTS, and LTE network. A side‐by‐side comparison of different network elements of GSM, GPRS, UMTS, and LTE networks is shown in Table 2.1 below. The BTS and BSC of a GSM network are known as the NodeB and RNC in the UMTS system. Similarly, the functions performed by a BTS and BSC of a GSM network are performed by the eNodeB only that is found in an LTE network which was shown in Figure 2.4.