🧭 Guides & ToolsBeginner

Glossary & Acronym Index

Every acronym on the site, expanded and defined in one line, with a link to the page that explains it in depth.

📚 3GPP-basedreference

This is the site-wide acronym index for 5G NR and LTE. Every important abbreviation used across the tutorials is expanded and given a one-line, 3GPP-accurate meaning here. Terms are grouped by theme and ordered alphabetically inside each group. Where an acronym has its own deep-dive page, the acronym links straight to it — and remember the search box at the top of every page also jumps to full articles as you type.

💡

How to use this page: skim the section that matches what you are studying, or use your browser's find (Ctrl/Cmd‑F) to land on a specific acronym. Linked acronyms open the dedicated explainer; unlinked ones are defined here in one line.

Architecture & Core Network

Acronym	Expansion	One-line meaning
`5GC`	5G Core Network	The service-based cloud-native core for NR, replacing the EPC.
`AMF`	Access and Mobility Management Function	5GC control node handling registration, connection and mobility (the MME's successor).
`AUSF`	Authentication Server Function	5GC function that runs primary authentication with the UE and home network.
`CU`	Central Unit	The gNB part hosting RRC/PDCP (and SDAP), split from the DU over F1.
`DU`	Distributed Unit	The gNB part hosting RLC/MAC/high-PHY, connected to the CU over F1.
`eNB`	evolved Node B	The LTE base station terminating the radio interface toward the UE.
`en-gNB`	E-UTRA-NR gNB	An NR node acting as secondary node under a master eNB in EN-DC (NSA).
`EN-DC`	E-UTRA-NR Dual Connectivity	NSA mode: LTE eNB master plus NR gNB secondary, anchored on EPC.
`EPC`	Evolved Packet Core	The LTE core network (MME, S-GW, P-GW, HSS, PCRF).
`EPS`	Evolved Packet System	The complete LTE system: E-UTRAN plus EPC.
`E-UTRAN`	Evolved UMTS Terrestrial Radio Access Network	The LTE radio access network, i.e. the collection of eNBs.
`gNB`	next generation Node B	The 5G NR base station connecting to the 5GC over the NG interface.
`HSS`	Home Subscriber Server	LTE central subscriber and authentication database (UDM/UDR in 5G).
`IMS`	IP Multimedia Subsystem	The SIP-based network that delivers VoLTE and VoNR voice/multimedia.
`MME`	Mobility Management Entity	LTE control-plane core node for attach, mobility, bearer and paging control.
`MR-DC`	Multi-Radio Dual Connectivity	Umbrella term for dual connectivity combining LTE and NR (includes EN-DC).
`N3IWF`	Non-3GPP Interworking Function	5GC gateway that lets untrusted non-3GPP access (e.g. Wi-Fi) reach the core.
`NG-RAN`	Next Generation Radio Access Network	The 5G RAN made of gNBs and ng-eNBs connected to the 5GC.
`ng-eNB`	next generation eNB	An LTE eNB upgraded to connect to the 5GC (used in NG-RAN / Option 5, 7).
`NRF`	Network Repository Function	5GC registry where network functions discover and register each other.
`NSA`	Non-Standalone	NR deployed with an LTE anchor and EPC/EN-DC rather than a standalone 5GC.
`NSSF`	Network Slice Selection Function	5GC function that selects the serving slice(s) and AMF set for the UE.
`PCF`	Policy Control Function	5GC policy engine for QoS and charging rules (successor to PCRF).
`PCRF`	Policy and Charging Rules Function	LTE node deciding QoS and charging policy per service data flow.
`P-GW`	Packet Data Network Gateway	LTE anchor to external PDNs, doing IP allocation, charging and policy enforcement.
`RU`	Radio Unit	The gNB low-PHY/RF unit (O-RAN), connected to the DU over fronthaul.
`SA`	Standalone	NR deployed directly on the 5GC with no LTE anchor (Option 2).
`SEPP`	Security Edge Protection Proxy	5GC edge proxy securing signalling between different operators' networks.
`S-GW`	Serving Gateway	LTE user-plane node anchoring bearers during handover and routing to the P-GW.
`SGSN`	Serving GPRS Support Node	Legacy 2G/3G packet core node for mobility and session management.
`SMF`	Session Management Function	5GC node that sets up and controls PDU sessions and the UPF.
`UDM`	Unified Data Management	5GC subscriber-data and authentication management (HSS successor).
`UDR`	Unified Data Repository	5GC backend store holding subscription, policy and application data.
`UPF`	User Plane Function	5GC user-plane anchor: packet routing, QoS enforcement and PDU-session gateway.

Physical Layer & Radio

Acronym	Expansion	One-line meaning
`BWP`	Bandwidth Part	A contiguous subset of carrier PRBs with its own numerology the UE operates within.
`CA`	Carrier Aggregation	Combining multiple component carriers to widen bandwidth and boost throughput.
`CBG`	Code Block Group	A group of code blocks that can be retransmitted independently within a TB.
`CP`	Cyclic Prefix	A guard copy prepended to each OFDM symbol to absorb multipath delay spread.
`CQI`	Channel Quality Indicator	UE-reported index telling the gNB which MCS the downlink can currently sustain.
`DFT-s-OFDM`	DFT-spread OFDM	The low-PAPR uplink waveform (transform precoding) option for PUSCH.
`FDD`	Frequency Division Duplex	Duplex mode with separate paired frequencies for uplink and downlink.
`FR1`	Frequency Range 1	NR sub-7 GHz bands (roughly 410 MHz–7.125 GHz).
`FR2`	Frequency Range 2	NR millimetre-wave bands (roughly 24.25–71 GHz).
`LDPC`	Low-Density Parity-Check code	The forward-error-correction code used for NR data channels.
`MCS`	Modulation and Coding Scheme	Index selecting modulation order and code rate for a transmission.
`MIMO`	Multiple-Input Multiple-Output	Using multiple antennas for spatial multiplexing, diversity or beamforming.
`OFDM`	Orthogonal Frequency Division Multiplexing	The multicarrier waveform used on the NR downlink (and CP-OFDM uplink).
`PMI`	Precoding Matrix Indicator	UE-recommended precoder for downlink MIMO transmission.
`Polar`	Polar code	The FEC code used for NR control channels (PBCH, PDCCH, PUCCH).
`PRG`	Precoding Resource-block Group	Set of contiguous PRBs over which the same precoder is assumed.
`QAM`	Quadrature Amplitude Modulation	Modulation family (QPSK, 16/64/256QAM) mapping bits to constellation points.
`RB`	Resource Block	12 contiguous subcarriers in frequency, the basic scheduling unit.
`RBG`	Resource Block Group	A bundle of consecutive RBs used for type-0 frequency-domain allocation.
`RE`	Resource Element	One subcarrier over one OFDM symbol — the smallest resource unit.
`RI`	Rank Indicator	UE-reported number of usable MIMO layers (spatial streams).
`RIV`	Resource Indicator Value	Compact encoding of a contiguous RB start and length in a DCI grant.
`RSRP`	Reference Signal Received Power	Average power of the reference signals — the main coverage/serving-cell metric.
`RSRQ`	Reference Signal Received Quality	RSRP relative to total RSSI — a quality metric factoring in load/interference.
`RSSI`	Received Signal Strength Indicator	Total wideband received power including signal, interference and noise.
`SCS`	Subcarrier Spacing	NR numerology parameter (15×2^μ kHz) trading bandwidth for symbol duration.
`SINR`	Signal-to-Interference-plus-Noise Ratio	Ratio of wanted signal to interference plus noise, driving achievable MCS.
`SRS`	Sounding Reference Signal	Uplink pilot the gNB uses to estimate the uplink channel and for reciprocity.
`SUL`	Supplementary Uplink	An extra low-band uplink carrier paired with a TDD downlink to extend UL coverage.
`TA`	Timing Advance	Offset the UE applies to its uplink so bursts arrive time-aligned at the gNB.
`TAG`	Timing Advance Group	Group of serving cells sharing one timing-advance value in CA.
`TB`	Transport Block	The MAC-layer payload handed to PHY for one transmission (one HARQ process).
`TBS`	Transport Block Size	Number of information bits in a transport block, derived from MCS and resources.
`TDD`	Time Division Duplex	Duplex mode sharing one frequency between uplink and downlink in time.
`Turbo`	Turbo code	The FEC code used for LTE data channels (replaced by LDPC in NR).

Channels & Signals

Acronym	Expansion	One-line meaning
`BCCH`	Broadcast Control Channel	Logical channel carrying system information (MIB/SIBs) to all UEs.
`BCH`	Broadcast Channel	Transport channel carrying the MIB, mapped to PBCH.
`CCCH`	Common Control Channel	Logical channel for RRC signalling before a UE has a dedicated connection.
`CRS`	Cell-specific Reference Signal	Always-on LTE downlink pilot for demodulation and measurements (not in NR).
`CSI-RS`	Channel State Information Reference Signal	Downlink pilot the UE measures to report CQI/PMI/RI and for beam management.
`DCCH`	Dedicated Control Channel	Logical channel carrying dedicated RRC signalling to a connected UE.
`DCI`	Downlink Control Information	Control message on PDCCH carrying scheduling grants and assignments.
`DL-SCH`	Downlink Shared Channel	Main downlink transport channel carrying user data and most signalling, on PDSCH.
`DMRS`	Demodulation Reference Signal	Pilot embedded in a channel so the receiver can coherently demodulate it.
`DTCH`	Dedicated Traffic Channel	Logical channel carrying user-plane data to/from one UE.
`MIB`	Master Information Block	Minimal system info on PBCH pointing the UE to SIB1.
`PBCH`	Physical Broadcast Channel	Physical channel carrying the MIB inside the SSB.
`PCCH`	Paging Control Channel	Logical channel carrying paging messages to idle UEs.
`PCFICH`	Physical Control Format Indicator Channel	LTE channel signalling how many symbols the PDCCH occupies (not in NR).
`PCH`	Paging Channel	Transport channel carrying paging, mapped to PDSCH.
`PDCCH`	Physical Downlink Control Channel	Carries DCI: scheduling grants, assignments and power-control commands.
`PDSCH`	Physical Downlink Shared Channel	The workhorse downlink channel carrying user data and signalling.
`PHICH`	Physical HARQ Indicator Channel	LTE channel carrying uplink HARQ ACK/NACK (replaced by DCI in NR).
`PRACH`	Physical Random Access Channel	Uplink channel carrying the RACH preamble for initial/uplink access.
`PSS`	Primary Synchronisation Signal	First sync signal in the SSB giving symbol timing and part of the PCI.
`PTRS`	Phase Tracking Reference Signal	Pilot tracking phase noise/CFO, important at high frequencies (FR2).
`PUCCH`	Physical Uplink Control Channel	Carries UCI: HARQ feedback, scheduling requests and CSI reports.
`PUSCH`	Physical Uplink Shared Channel	The main uplink channel carrying user data and some control.
`RACH`	Random Access Channel	Transport channel for the random-access preamble, mapped to PRACH.
`SIB`	System Information Block	Broadcast blocks (SIB1, SIB2…) carrying cell access and configuration info.
`SPS`	Semi-Persistent Scheduling	Pre-configured periodic resources granted without per-slot DCI.
`SSB`	Synchronisation Signal Block	The NR beacon bundling PSS, SSS and PBCH for cell search and beam sweep.
`SSS`	Secondary Synchronisation Signal	Second SSB sync signal completing the physical cell ID.
`UCI`	Uplink Control Information	Control feedback (HARQ-ACK, SR, CSI) carried on PUCCH or piggybacked on PUSCH.
`UL-SCH`	Uplink Shared Channel	Main uplink transport channel carrying user data, mapped to PUSCH.

MAC / RLC / PDCP / SDAP

Acronym	Expansion	One-line meaning
`BSR`	Buffer Status Report	MAC report telling the gNB how much uplink data the UE has buffered.
`COUNT`	PDCP COUNT	The HFN + PDCP SN value used as input to ciphering and integrity per PDU.
`DRX`	Discontinuous Reception	Sleep/wake cycle letting the UE power down its receiver to save battery.
`HARQ`	Hybrid Automatic Repeat reQuest	Fast retransmission scheme combining FEC with soft-combining of retries.
`HFN`	Hyper Frame Number	The high-order part of PDCP COUNT that extends the wrapping SN.
`LCG`	Logical Channel Group	Grouping of logical channels used to compress buffer status reporting.
`LCID`	Logical Channel ID	MAC subheader field identifying the logical channel or MAC CE in a PDU.
`LCP`	Logical Channel Prioritisation	MAC procedure sharing a grant across logical channels by priority.
`MAC CE`	MAC Control Element	In-band MAC control message (e.g. TA command, BSR, DRX command).
`PDCP`	Packet Data Convergence Protocol	L2 layer doing ciphering, integrity, ROHC, reordering and duplication.
`PDU`	Protocol Data Unit	A protocol layer's output packet (its SDU plus that layer's header).
`PHR`	Power Headroom Report	MAC report of how much transmit-power margin the UE still has.
`RLC`	Radio Link Control	L2 layer providing segmentation and (in AM) ARQ retransmission.
`ROHC`	Robust Header Compression	PDCP feature compressing IP/UDP/RTP headers to save air-interface bytes.
`SDAP`	Service Data Adaptation Protocol	NR-only L2 layer mapping QoS flows to DRBs and marking QFI.
`SDU`	Service Data Unit	The payload a layer receives from the layer above, before adding its header.
`SN`	Sequence Number	Per-PDU counter (RLC/PDCP) enabling ordering, reassembly and duplicate detection.
`SR`	Scheduling Request	Minimal uplink signal on PUCCH asking the gNB for an uplink grant.

RRC & Mobility

Acronym	Expansion	One-line meaning
`Cell Reselection`	Cell Reselection	Idle/inactive-mode procedure where the UE itself picks a better cell to camp on.
`CHO`	Conditional Handover	Handover pre-configured with trigger conditions the UE executes autonomously.
`HO`	Handover	Network-controlled transfer of a connected UE from a source to a target cell.
`Meas`	Measurement (RSRP/RSRQ/SINR)	UE radio measurements reported to drive mobility and link-adaptation decisions.
`MG`	Measurement Gap	Scheduled pause in data so the UE can measure other frequencies/RATs.
`NSSAI`	Network Slice Selection Assistance Information	The set of S-NSSAIs signalling which network slices the UE wants/uses.
`RRC`	Radio Resource Control	Layer-3 protocol configuring the radio: connection, bearers, mobility, SI.
`RLF`	Radio Link Failure	Declared when the radio link degrades beyond recovery, triggering re-establishment.
`RLM`	Radio Link Monitoring	UE monitoring of in-sync/out-of-sync on reference signals to detect RLF.
`S-NSSAI`	Single Network Slice Selection Assistance Information	Identifier of one slice, made of SST plus optional SD.
`SD`	Slice Differentiator	Optional field distinguishing multiple slices of the same SST.
`SMTC`	SSB Measurement Timing Configuration	The window telling the UE when to measure neighbour SSBs.
`SST`	Slice/Service Type	Field of an S-NSSAI naming the slice's service class (eMBB, URLLC, MIoT).

NAS & Core Procedures

Acronym	Expansion	One-line meaning
`APN`	Access Point Name	LTE name of the external packet network a PDN connection targets (DNN in 5G).
`Attach`	EPS Attach	LTE procedure by which the UE registers and gets a default EPS bearer.
`DNN`	Data Network Name	5G name of the data network a PDU session connects to (APN successor).
`EMM`	EPS Mobility Management	LTE NAS sublayer for attach, TAU and mobility state.
`ESM`	EPS Session Management	LTE NAS sublayer for default/dedicated bearer setup and modification.
`5GMM`	5GS Mobility Management	5G NAS sublayer for registration, service request and mobility.
`5GSM`	5GS Session Management	5G NAS sublayer for PDU-session establishment and modification.
`NAS`	Non-Access Stratum	Signalling directly between UE and core (AMF/MME), transparent to the RAN.
`PDU Session`	Protocol Data Unit Session	5G end-to-end connectivity between UE and a data network via the UPF.
`Registration`	5GS Registration	5G procedure by which the UE registers with the AMF (attach successor).
`TAU`	Tracking Area Update	LTE procedure updating the network on the UE's tracking area / periodic check-in.

Identifiers & RNTIs

Acronym	Expansion	One-line meaning
`5G-GUTI`	5G Globally Unique Temporary Identity	Temporary UE identity assigned by the AMF to avoid exposing the SUPI.
`5G-S-TMSI`	5G S-Temporary Mobile Subscriber Identity	Shortened part of the 5G-GUTI used for paging and RACH.
`C-RNTI`	Cell RNTI	Unique identity of a connected UE within a cell, addressing its PDCCH.
`CS-RNTI`	Configured Scheduling RNTI	RNTI addressing configured-grant / SPS transmissions.
`ECGI`	E-UTRAN Cell Global Identifier	Globally unique LTE cell identity (PLMN + 28-bit cell ID).
`GUAMI`	Globally Unique AMF Identifier	Identifier of a specific AMF (PLMN + AMF region/set/pointer).
`GUMMEI`	Globally Unique MME Identifier	Identifier of a specific MME (PLMN + MME group/code).
`GUTI`	Globally Unique Temporary Identity	LTE temporary UE identity assigned by the MME.
`IMEI`	International Mobile Equipment Identity	Permanent identity of the device hardware itself.
`IMSI`	International Mobile Subscriber Identity	Permanent subscriber identity stored on the SIM/USIM.
`NCGI`	NR Cell Global Identity	Globally unique NR cell identity (PLMN + 36-bit NR cell ID).
`P-RNTI`	Paging RNTI	Fixed RNTI used to scramble PDCCH scheduling paging messages.
`PCI`	Physical Cell Identity	One of 1008 physical-layer cell IDs derived from PSS and SSS.
`PLMN`	Public Land Mobile Network	An operator's network, identified by MCC + MNC.
`RA-RNTI`	Random Access RNTI	RNTI addressing the Random Access Response, derived from PRACH time/frequency.
`SI-RNTI`	System Information RNTI	Fixed RNTI used to scramble PDCCH scheduling system information.
`S-TMSI`	S-Temporary Mobile Subscriber Identity	Shortened LTE GUTI used for paging and initial access.
`SUCI`	Subscription Concealed Identifier	Encrypted (public-key concealed) form of the SUPI sent over the air.
`SUPI`	Subscription Permanent Identifier	The permanent 5G subscriber identity (usually the IMSI).
`TAC`	Tracking Area Code	Code identifying a tracking area used for paging and registration areas.
`TAI`	Tracking Area Identity	Globally unique tracking area (PLMN + TAC).
`TC-RNTI`	Temporary C-RNTI	Provisional RNTI given in Msg2 before contention resolution completes.
`TPC-RNTI`	Transmit Power Control RNTI	RNTI addressing group power-control commands on PDCCH.

QoS & Bearers

Acronym	Expansion	One-line meaning
`5QI`	5G QoS Identifier	Scalar pointing to a standardised set of 5G QoS characteristics (QCI successor).
`AMBR`	Aggregate Maximum Bit Rate	Ceiling on total non-GBR throughput per UE or per session.
`ARP`	Allocation and Retention Priority	Priority governing admission and which bearers get pre-empted under congestion.
`DRB`	Data Radio Bearer	Radio bearer carrying user-plane data between UE and RAN.
`GBR`	Guaranteed Bit Rate	QoS class with reserved, guaranteed throughput (e.g. voice).
`GFBR`	Guaranteed Flow Bit Rate	The guaranteed rate of a GBR QoS flow.
`MBR`	Maximum Bit Rate	Upper throughput limit enforced on a bearer or flow.
`MFBR`	Maximum Flow Bit Rate	The maximum rate a GBR QoS flow may use.
`PDB`	Packet Delay Budget	Target upper bound on packet latency for a QoS class.
`PER`	Packet Error Rate	Target residual error rate for a QoS class after L2 delivery.
`QCI`	QoS Class Identifier	LTE scalar naming a standardised QoS profile (5QI successor in 5G).
`QFI`	QoS Flow Identifier	Marks each 5G QoS flow so SDAP/UPF can map and enforce it.
`QoS Flow`	Quality of Service Flow	Finest QoS granularity in 5G, mapped onto DRBs by SDAP.
`SDF`	Service Data Flow	A set of IP flows matched by a filter and given a common QoS treatment.
`SRB`	Signalling Radio Bearer	Radio bearer carrying RRC/NAS signalling (SRB0/1/2/3).
`TFT`	Traffic Flow Template	Packet-filter set binding IP flows to a specific EPS bearer.

Security

Acronym	Expansion	One-line meaning
`AKA`	Authentication and Key Agreement	Challenge-response protocol authenticating UE and network and deriving keys.
`AV`	Authentication Vector	The set of authentication parameters (RAND, AUTN, XRES, keys) from the home network.
`EEA`	EPS Encryption Algorithm	LTE ciphering algorithm family (EEA0/1/2/3).
`EIA`	EPS Integrity Algorithm	LTE integrity-protection algorithm family (EIA0/1/2/3).
`KAMF`	K_AMF	5G key held at the AMF, root of the access-stratum and NAS key branches.
`KASME`	K_ASME	LTE top-level key derived after AKA, root of the LTE key hierarchy.
`KAUSF`	K_AUSF	5G key derived at UE and AUSF as the anchor for further key derivation.
`KeNB`	K_eNB	LTE access-stratum key at the eNB, from which RRC/UP keys derive.
`KgNB`	K_gNB	5G access-stratum key at the gNB, root of AS RRC/UP keys.
`KSEAF`	K_SEAF	5G anchor key derived from K_AUSF for the serving network.
`KDF`	Key Derivation Function	The HMAC-SHA-256 function generating child keys in the hierarchy.
`MAC-I`	Message Authentication Code for Integrity	Integrity token appended to protected messages to detect tampering.
`NCC`	Next-hop Chaining Counter	Counter driving forward key separation across handovers.
`NEA`	NR Encryption Algorithm	5G ciphering algorithm family (NEA0/1/2/3).
`NH`	Next Hop	Derived key material providing forward security at handover.
`NIA`	NR Integrity Algorithm	5G integrity-protection algorithm family (NIA0/1/2/3).
`RES / XRES`	(Expected) Response	UE-computed response and network-expected response compared during AKA.
`SMC`	Security Mode Command	Procedure activating ciphering and integrity for AS or NAS.

Voice (VoLTE / VoNR)

Acronym	Expansion	One-line meaning
`AMR`	Adaptive Multi-Rate	Narrowband speech codec family used for VoLTE/VoNR.
`AMR-WB`	Adaptive Multi-Rate Wideband	Wideband ("HD Voice") variant of the AMR codec.
`CSFB`	Circuit-Switched Fallback	Falling back from LTE to 2G/3G circuit-switched for a voice call.
`EPS Fallback`	EPS Fallback	5G voice mechanism redirecting the UE to LTE/VoLTE when VoNR isn't available.
`EVS`	Enhanced Voice Services	Super-wideband/full-band codec giving the best VoLTE/VoNR voice quality.
`RTCP`	RTP Control Protocol	Companion to RTP carrying media quality/statistics reports.
`RTP`	Real-time Transport Protocol	Transport carrying the encoded voice media packets.
`SIP`	Session Initiation Protocol	IMS signalling protocol that sets up, modifies and tears down voice sessions.
`SRVCC`	Single Radio Voice Call Continuity	Handing an in-progress VoLTE call to 2G/3G circuit-switched without a break.
`VoLTE`	Voice over LTE	IMS voice carried over LTE on a dedicated QCI-1 bearer.
`VoNR`	Voice over NR	IMS voice carried natively over 5G NR on a 5QI-1 QoS flow.

Interfaces & Transport Protocols

Acronym	Expansion	One-line meaning
`Diameter`	Diameter	AAA/signalling protocol used on LTE interfaces such as S6a (MME–HSS).
`E1AP`	E1 Application Protocol	Signalling between the gNB-CU-CP and gNB-CU-UP over the E1 interface.
`F1AP`	F1 Application Protocol	Signalling between the gNB-CU and gNB-DU over the F1 interface.
`GTP-C`	GPRS Tunnelling Protocol – Control	Control-plane tunnelling for bearer/session management in the EPC.
`GTP-U`	GPRS Tunnelling Protocol – User plane	Encapsulates user data in tunnels between RAN and core (identified by TEID).
`NGAP`	NG Application Protocol	Control signalling between the gNB and the AMF over the NG interface.
`S1AP`	S1 Application Protocol	Control signalling between the eNB and the MME over the S1 interface.
`SCTP`	Stream Control Transmission Protocol	Reliable multi-stream transport carrying RAN control signalling (NGAP/S1AP).
`TEID`	Tunnel Endpoint Identifier	Identifies a specific GTP tunnel endpoint for user-plane routing.
`X2AP`	X2 Application Protocol	Inter-eNB signalling for LTE handover and dual connectivity over X2.
`XnAP`	Xn Application Protocol	Inter-gNB signalling for NR handover and dual connectivity over Xn.

Where to go next

Now that the vocabulary is in place, follow a guided path through the topics or line up LTE against 5G side by side.

Learning RoadmapLTE vs 5G Compare