Following are the main requirements that lead 3GPP to standardise 5G specificaitons 1. Evolved Mobile Broadband (eMBB) - To support high data rates 2. Ultra-Reliable and Low-Latency Communication (URLLC) - For reliable & low latency end to end communication 3. Massive machine-to-machine communication (mM2M) - To connect massive number of devices i.e. IoT Before Going into 5G we'll revise OFDM concepts.