Alias
Supplemental Uplink
SUL is a technique used in NR (5G) systems to allocate additional spectrum specifically for uplink (user equipment to base station) communication. This method can be beneficial in scenarios where there is a higher demand for uplink data transmission, such as in IoT applications where many devices may be sending data to the network. It is similar to SDL but improves data rates in the opposite direction. As in most networks uplink is more rarely congested, SUL is less frequently deployed.
