Figure 2. The uplink and downlink nomenclature for LTE networks

From

Evolution of Mobile Communication Technology towards 5G Networks and Challenges

Arun Agarwal, Kabita Agarwal, Sumanshu Agarwal, Gourav Misra

American Journal of Electrical and Electronic Engineering. 2019, 7(2), 34-37 doi:10.12691/ajeee-7-2-2