As mobile communication continues to evolve, the ability for direct device-to-device (D2D) communication has become crucial in LTE-Advanced Pro and 5G networks. This feature, known as sidelink, allows devices to share information without going through the base station. . The E-UTRAN handles the radio communications between the mobile and the evolved packet core and just has one component, the evolved base stations, called eNodeB or eNB. Each eNB is a base station that controls the mobiles in one or more cells. Cellular networks operate on different frequency bands, which are divided into channels. . In telecommunications, long-term evolution (LTE) is a standard for wireless broadband communication for cellular mobile devices and data terminals.
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