Georgian Scientists/ . 6 N 2, 2024 278 Georgian Scientists Vol. 6 Issue 2, 2024 https://doi.org/10.52340/gs.2024.06.02.29 : 3.3.1. : 4G LTE 5G-NR 1, 2 1 . . . g.murjikneli@gtu.ge 2 . . - . kotebeg@gmail.com . LTE, 5G . , , . , 4G, 5G , . , . , , , 4G 5G . . : , , , , , , . Georgian Scientists/ . 6 N 2, 2024 279 : , , . 3G . UMTS- - HSPA+ 5 . 4G LTE , . : 1.4, 3, 5, 10, 15, 20 . , , LTE 5G-NR . 4G 5G , . , . , LTE NR . . , , . R8 R9 UE- [1]. FDD TDD, .1- FDD- . Georgian Scientists/ . 6 N 2, 2024 280 .1. FDD . LTE-Advanced UE . R8/R9 UE- . . , , , . 1.4, 3, 5, 10, 15, 20 MHz 4G LTE . , 100 MHz. FDD DL UL- ( .1). UL DL . . TDD- , DL UL- . , , , . , . , , . Georgian Scientists/ . 6 N 2, 2024 281 , . .2- : .2. , × 300 (1) I , N . (1) . E-UTRA . , : (ATBC): (PRB- ) . CA : ATBC . R10- R11- : A: ATBC 100 CC = 1 B: ATBC 100 CC = 2 C: 100 < ATBC < 200 CC=2 : E-UTRA . CA_1C Georgian Scientists/ . 6 N 2, 2024 282 E-UTRA 1 , C 100 < ATBC < 200. CA_1A_1A: , 1 . . A. CA_1A- 5B , 1- A , -5- B ( .1). 1 : ( ) . FDD CA_1C 40 2 . TDD CA_40C 40 2 FDD CA_1A_5A 20 1 + 1 , . , . ( .3). Georgian Scientists/ . 6 N 2, 2024 283 .3. . RRC , , , (PCC). DL PCC, UE NAS , . , , . , . .3- , . , . .2. 3GPP- . 3GPP .2- . , ATBC, . 5G FR2 . : Georgian Scientists/ . 6 N 2, 2024 284 , 4G LTE 5G-NR . , . 4 2 , . , , . , , , . , . LTE Advanced LTE Advanced Pro 5G NR Release 10 Release 11 Release 12 Release 13 Release 14 Release 15 Max DL/UL CC 5 5 5 32 32 16 Max BW (MHz) 100 100 100 640 640 6400 CC BW (MHz) 1.4, 3, 5, 10, 15,20 1.4, 3, 5, 10, 15,20 1.4, 3, 5, 10, 15,20 1.4, 3, 5, 10, 15,20 1.4, 3, 5, 10, 15,20 FR1(5, 10, 15, 20, 25, 30, 40, 50, 60, 80, 90, 100) FR2( 50, 100, 200, 4000) Georgian Scientists/ . 6 N 2, 2024 285 1. 3GPP. (2024). Retrieved April 04, https://www.3gpp.org/technologies/101-carrier- aggregation-explained 2. Nokia. (n.d). Retrieved April 01, https://www.nokia.com/about-us/newsroom/articles/5g- carrier-aggregation-explained/ 3. Murjikneli G.G. Begiashvili K.D. (2018). INTERFERENCES IN CONTEMPORARY MOBILE COMMUNICATION SYSTEMS AND MITIGATION WAYES ANALYSIS, “Energy: Regional Problems and development opportunities”. 25.10.2018-26.10.2018 4. Givi Murjikneli, Kote Begiashvili. (2023) Evaluation of the quality indicators of mobile connection based on the use of artificial intelligence methods. MODERN CHALLENGES AND ACHIEVEMENTS IN INFORMATION AND COMMUNICATION TECHNOLOGIES. ISBN 978-9941-512-06-3. 85-91 5. Kote Begiashvili. (2024). Investigating global mobile network traffic dynamics and drivers. Georgian Scientists. https://doi.org/10.52340/gs.2024.06.02.26 Investigation Carrier Aggregation in 4G LTE and 5G NR Networks Givi Murjikneli1. Kote Begiashvili2 1Professor. Georgian Technical University. Digital Telecommunication Technologies Department 2PHD student. Georgian Technical University. Doctoral Program in Digital Telecommunication Technologies Abstract: Carrier aggregation technology provides a significant enhancement to wireless communication networks by enabling the amalgamation of multiple LTE or NR component carriers, thereby increasing bandwidth capacity, improving data rates, and enhancing the overall user experience. This technology plays a key role in both 4G and 5G networks, optimizing spectral efficiency and network performance. This paper explores the fundamentals of carrier aggregation, its implementation in 4G and 5G networks, and the challenges and future directions associated with this technology. Experimental results, case studies, and analysis are presented to evaluate the impact of carrier aggregation on key performance metrics and network efficiency. Keywords: carrier aggregation, component, bandwidth, bits per second, Release, Channel, class.