SDU Service Data Unit
SE Security Environment
Sending Entity
Support Entity
SEF Support Entity Function
SeGW Security Gateway
SeNB Secondary eNB
SET SUPL Enabled Terminal
SF Spreading Factor
SFH Slow Frequency Hopping
SFI Short EF Identifier
SFN System Frame Number
SGSN Serving GPRS Support Node
S-GW Serving Gateway, обслуживающий шлюз.
SHCCH Shared Channel Control Channel
SI Screening Indicator
System Information
Service Interworking
Supplementary Information (SIA = Supplemenatary Information A)
SIB System Information Block
SIBX SystemInformationBlockTypeX
SIC Service Implementation Capabilities
SID SIlence Descriptor
SIM GSM Subscriber Identity Module
SINR Signal-to-Interference-and-Noise Ratio
SIP Session Initiated Protocol
SIPTO Selected IP Traffic Offload
SIPTO@LN Selected IP Traffic Offload at the Local Network
SIR Signal-to-Interference Ratio
SI-RNTI System Information RNTI
SL Sidelink
SLA Service Level Agreement
SL-BCH Sidelink Broadcast Channel
SL-DCH Sidelink Discovery Channel
SLP SUPL Location Platform
SLPP Subscriber LCS Privacy Profile
SLR Send Loudness Rating
SL-RNTI Sidelink RNTI
SL-SCH Sidelink Shared Channel
SLSS Sidelink Synchronisation Signal
SLTM Signalling Link Test Message
SL-V-RNTI Sidelink V2X RNTI
SM Spatial Multiplexing, пространственное уплотнение.
SM Session Management
Short Message
SMC Security Mode Control
SMDS Switched Multimegabit Data Service
SME Short Message Entity
SMG Special Mobile Group
SMI Structure of Management Information (RFC 1155)