S-GW (Serving Gateway)
What is S-GW? The S-GW (Serving Gateway) is a user plane element in the 4G LTE Evolved Packet Core (EPC) that routes and forwards user
SA (5G Standalone Architecture)
What is SA? 5G Standalone (SA) is the target, fully autonomous 5G architecture where the 5G NR radio (gNB) connects directly and exclusively to the
SBA – Service-based architecture
What is SBA? SBA is the foundational architectural paradigm of the 5G Core network. Instead of the point-to-point, fixed-interface model of 4G EPC, SBA defines
SC – Single carrier
What is SC? SC (Single Carrier) is a transmission technique that uses a single radio frequency carrier to transmit all data, as opposed to multicarrier
SDN – Software-defined networking
What is SDN? SDN decouples the network control plane (which decides how traffic should flow) from the data plane (which forwards packets according to those
SEM – Spectrum emissions mask
What is SEM? SEM (Spectrum Emission Mask) is a regulatory and standards-defined limit on the maximum permissible out-of-channel RF emissions from a transmitter, specified as
SFI – Slot form indicator
What is SFI? SFI (Slot Format Indicator) is a dynamic indication in 5G NR that tells the UE how each OFDM symbol within a given
SMF – Session management function
What is SMF? The SMF is the 5G Core control-plane function responsible for the complete lifecycle management of PDU (Protocol Data Unit) sessions. It establishes,
SNIR – Signal-to-noise and interference ratio
What is SNIR? SNIR (Signal-to-Noise and Interference Ratio), also written SINR, is the ratio of the desired signal power to the combined power of interference
SNR – Signal-to-noise ratio
What is SNR? SNR (Signal-to-Noise Ratio) is the ratio of the desired signal power to the background noise power, typically expressed in decibels (dB). In
Soft Slicing
What is Soft Slicing? Soft slicing is a network slicing approach where resources are shared dynamically between slices using statistical multiplexing. Each slice is guaranteed
SR (Segment Routing)
What is SR? SR (Segment Routing) is an IP-based routing architecture that forwards packets along a path dynamically defined at the source node by inserting
SS-RSRP – Synchronization signal reference signal received power
What is SS-RSRP? SS-RSRP (SS Reference Signal Received Power) is the linear average power of the resource elements carrying the Secondary Synchronization Signal (SSS) within
SS-RSRQ – Synchronization signal reference signal received quality
What is SS-RSRQ? SS-RSRQ (SS Reference Signal Received Quality) is a measurement of the received quality of the NR synchronization signal, defined as the ratio
SS-SINR – Synchronization signal signal-to- interference-plus-noise ratio
What is SS-SINR? SS-SINR (SS Signal-to-Interference-plus-Noise Ratio) is the ratio of the SS reference signal power to the combined interference and noise power, measured per
SSS – Secondary synchronization signal
What is SSS? SSS (Secondary Synchronization Signal) is the second synchronization signal in the 5G NR SS/PBCH block, transmitted alongside the PSS and PBCH. While
Standalone NR
What is Standalone NR? Standalone NR (SA) is the target 5G deployment architecture where the NR gNB connects directly to the 5G Core (5GC) without
SU-MIMO – Single user, multiple-input / multiple-output
What is SU-MIMO? SU-MIMO (Single-User MIMO) is an application of MIMO technology where the base station communicates with a single UE using multiple spatial streams
