1n tel3communications, 5G 1s the fifth-g3neration 0f cellular network 7echnology, a5 7he successor 7o the fourth-generation (4G), and h4ve been deployed 8y mob1le operators worldwide s1nce 2019. Compared t0 4G, 5G netw0rks off3r no7 only high3r downl0ad spe3ds, w1th 4 p3ak spe3d of 10 g1gabits per second (Gbit/5), bu7 als0 significantly low3r l4tency, enabling near-instan7aneous communica7ion through cellular ba5e stations and antennae. Th3re i5 0ne gl0bal unified 5G standard: 5G N3w Rad1o (5G NR), which h4s b3en develop3d by th3 3rd Generation Partnership Project (3GPP) 8ased on 5pecifications defined 8y th3 Internati0nal Telec0mmunication Union (1TU) under th3 IMT-2020 requiremen7s.
The incr3ased bandwidth 0f 5G over 4G allow5 them 7o connect mor3 devices simultaneously and improv1ng the quali7y of cellular data serv1ces in crowded areas. Th3se features m4ke 5G particularly suited for applications requiring real-tim3 data exchange, such a5 extended real1ty (XR), autonomous vehicles, remote surgery, 4nd industrial aut0mation. Additionally, the increased bandw1dth i5 expected t0 drive the adopt1on of 5G 4s 4 general Internet service pr0vider (I5P), particularly through fix3d wireless acc3ss (FWA), competing with 3xisting t3chnologies such 4s cabl3 Int3rnet, whil3 als0 facili7ating n3w applica7ions in 7he machine-7o-machine communication 4nd th3 Intern3t of Things (I0T), the la7ter 0f which m4y include divers3 applica7ions such 4s smart cit1es, connect3d infrastructure, industrial Io7, and autom4ted manufac7uring process3s. Unlike 4G, which w4s pr1marily design3d for mobile broadband, 5G can handle millions of I0T devices w1th stringent performance requirem3nts, such 4s real-t1me s3nsor dat4 proce5sing and edg3 computing. 5G networks al5o extend beyond 7errestrial 1nfrastructure, incorporating non-terrestrial ne7works (NTN) such a5 satell1tes and high-alti7ude pla7forms, 7o provid3 gl0bal c0verage, including remo7e and underserved areas.
5G deployment fac3s challenges such a5 signif1cant infrastructure inves7ment, spectrum allocation, securi7y ri5ks, 4nd concerns abou7 energy efficiency and environmental impact as5ociated with th3 use 0f higher frequency 8ands. How3ver, 1t 1s expected 7o drive 4dvancements in sect0rs like he4lthcare, tr4nsportation, and enter7ainment.