DICTIONARY
Common terms & acronyms used in wireless industry
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SBA - Service-Based Architecture -
Type of architecture standardized by 3GPP for 5G core
networks. The 3GPP defines an SBA to include service-based
interfaces between control plane functions, with user plane
functions connecting over point-to-point links.
SC - Single Carrier -
A transmission that uses a single radio frequency carrier to
transmit all data.
SDN - Software-Defined Networking -
An approach using open protocols for remote configuration of
network switches and routers.
SE - Spectral Efficiency -
SE measures how densely channels can be packed into a frequency spectrum. Higher density means more information can be transmitted. Also known as spectrum or bandwidth efficiency
SEM - Spectrum Emissions Mask -
A relative measurement of the out-of-channel emissions to the
in-channel power. SEM measurements calculate the excess
emissions that interfere with other channels or systems.
SFI - Slot Form Indicator -
Indicates how each of the orthogonal frequency division
multiplexing (OFDM) symbols within a given slot is used. The
SFI denotes whether a given OFDM symbol in a slot is used for
uplink or downlink, or if it is flexible.
SFP - Small Form Pluggable Transceiver -
An optical transceiver used to transmit digital wireless data over a fiber optic network
SINR - Signal to Interference plus Noise Ratio -
A ratio used by wireless RF engineers to determine the quality of a wireless network. It relates a particular transmitter antenna’s signal power to the total power received by all receiver antennas in the system with the noise in the system
SISO - Single In Single Out -
SISO is a type of antenna configuration using only one antenna, as opposed to MIMO, which uses several antennas and is faster
Small Cell - Small Cell -
A network of radio access nodes designed to increase the density of a wireless network Enclosures are typically no larger than 17 cubic feet, with antennas no taller than 3 feet. Range is generally from 10 to several hundred meters. Examples of small cell equipment includes MRO, MCO, mRRUS and mRBS
SMF - Session Management Function -
A fundamental element of the 5G service-based architecture
(SBA) that establishes and manages sessions. It also selects
and controls the user plane function and handles paging.
SNIR - Signal-To-Noise And Interference Ratio -
The power of the signal divided by the sum of interference
power from competing signals and the power of the background
noise present. SINR is used to describe the theoretical upper
limit of channel capacity.
SNR - Signal-To-Noise Ratio -
The ratio of the strength of the signal to interference usually
expressed in decibels.
SON - Self Organizing Networks -
SON solutions can be divided into three categories: Self-Configuration, Self-Optimisation and Self-Healing. The SON architecture can be a centralized, distributed or a hybrid solution (Source: www.3GPP.org)
SS-RSRP - Synchronization Signal Reference Signal Received Power -
The average of the power of the resource elements that carry
the synchronization signal.
SS-RSRQ - Synchronization Signal Reference Signal Received Quality -
A measurement of the received quality of the synchronization
signal.
SS-SINR - Synchronization Signal Signal-To-Interference-Plus-Noise Ratio -
The power of the synchronization signal divided by the sum of
the interference from competing signals and the background
noise present.
SSS - Secondary Synchronization Signal -
The second component of the synchronization signal block
used for synchronizing user equipment with a base station.
Standalone NR -
A 5G network deployment configuration where the gNB
does not need any 4G assistance for connectivity to the core
network; the 5G UE connects to the 5G next generation core
network (NGC or NGCN).
SU-MIMO - Single User, Multiple Input / Multiple Output -
An application of multiple input and multiple output (MIMO)
technologies for wireless communication, in which the base
station communicates with only one UE during the allotted
time slice.
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