Level 27

Telecom Transport & Timing

Master telecom transport networks — IP/MPLS fundamentals and label switching, Segment Routing with SR-MPLS and SRv6, EVPN for mobile transport, fronthaul eCPRI and O-RAN 7.2x split, midhaul F1 interface, backhaul N2/N3 transport, PTP IEEE 1588v2 and SyncE timing, GNSS references, timing profiles G.8275.1 and G.8275.2, transport OAM with BFD and Y.1731, FlexE network slicing, and transport troubleshooting.

21 interactive2 simulation3 labs4 quizzes

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Transport Network Fundamentals

0/7

IP/MPLS basics for mobile networks, label switching and LSP concepts, Segment Routing with SR-MPLS and SRv6, EVPN, transport topologies, and QoS with DiffServ and MPLS TE.

IP/MPLS basics for mobile networks

How IP/MPLS underpins mobile transport from cell site to core with label-based forwarding.

interactive3 min

Label switching and LSP concepts

Label push, swap, pop operations and Label Switched Path establishment with LDP and RSVP-TE.

interactive3 min

Segment Routing — SR-MPLS and SRv6

Source-routed paths using segment identifiers in MPLS and IPv6 extension headers.

interactive4 min

EVPN for mobile transport

Ethernet VPN providing multi-point L2/L3 services for mobile backhaul and fronthaul.

interactive3 min

Transport topologies — ring, hub-spoke, mesh

Common transport network topologies with trade-offs in resilience, cost, and latency.

interactive3 min

QoS in transport — DiffServ and MPLS TE

Differentiated Services markings and MPLS Traffic Engineering for mobile traffic classes.

simulation4 min

Quiz: Transport fundamentals

Test your understanding of IP/MPLS, Segment Routing, and transport QoS.

quiz5 min

Fronthaul, Midhaul & Backhaul

0/8

xHaul architecture overview, eCPRI fronthaul and O-RAN 7.2x split, fronthaul bandwidth calculation, midhaul F1 interface, backhaul N2/N3 transport, fiber vs microwave vs satellite, and transport dimensioning.

xHaul architecture overview

End-to-end xHaul segmentation from O-RU through O-DU to O-CU and 5GC.

interactive3 min

Fronthaul — eCPRI and O-RAN 7.2x split

Enhanced CPRI protocol and the O-RAN lower-layer split with IQ sample transport.

interactive4 min

Fronthaul bandwidth calculation

Calculate fronthaul bandwidth requirements for various antenna configurations and split options.

lab5 min

Midhaul — F1 interface transport requirements

F1-C and F1-U transport between O-DU and O-CU with latency and bandwidth needs.

interactive3 min

Backhaul — N2/N3 and legacy S1/X2 transport

Backhaul carrying N2 control and N3 user-plane traffic from gNB-CU to 5G core.

interactive3 min

Fiber vs microwave vs satellite backhaul

Comparing backhaul technologies by capacity, latency, cost, and deployment scenarios.

interactive3 min

Transport dimensioning and capacity planning

Sizing transport links based on cell throughput, overbooking, and growth projections.

simulation4 min

Quiz: xHaul networks

Test your knowledge of fronthaul, midhaul, and backhaul transport requirements.

quiz5 min

Timing & Synchronization

0/8

Why timing matters in 5G, PTP IEEE 1588v2 clock hierarchy, SyncE frequency sync, GNSS references, ITU-T timing profiles, phase vs frequency vs time-of-day, and timing error budgets.

Why timing matters in 5G — TDD, CA, CoMP

How TDD slot alignment, carrier aggregation, and CoMP demand tight synchronization.

interactive3 min

PTP IEEE 1588v2 — grandmaster, boundary, transparent clocks

Precision Time Protocol clock hierarchy and message exchange for nanosecond accuracy.

interactive4 min

SyncE — physical layer frequency synchronization

Synchronous Ethernet recovering timing from the physical layer with SSM quality levels.

interactive3 min

GNSS as primary timing reference

GPS and multi-constellation GNSS receivers as Primary Reference Time Clocks.

interactive3 min

Timing profiles — G.8275.1 vs G.8275.2

ITU-T telecom profiles for full on-path and partial on-path PTP deployment.

interactive3 min

Phase vs frequency vs time-of-day synchronization

Distinguishing frequency, phase, and time-of-day requirements for different 5G features.

interactive3 min

Lab: Timing error budget calculator

Build a timing error budget across the transport chain from PRTC to gNB.

lab5 min

Quiz: Timing and synchronization

Test your understanding of PTP, SyncE, GNSS, and 5G timing requirements.

quiz5 min

Transport Operations

0/7

Transport OAM with BFD, Y.1731, and CFM, fault detection and protection switching, SR traffic engineering, FlexE network slicing, O-RAN fronthaul switching, and transport troubleshooting.

Transport OAM — BFD, Y.1731, CFM

Operations, administration, and maintenance protocols for transport fault and performance monitoring.

interactive3 min

Fault detection and protection switching

Sub-50ms protection switching with linear, ring, and MPLS FRR mechanisms.

interactive3 min

Segment Routing traffic engineering

SR-TE policies with explicit path constraints, bandwidth reservation, and intent-based routing.

interactive4 min

Network slicing in transport — FlexE and VPN

FlexE hard slicing and VPN-based soft slicing for end-to-end network slice transport.

interactive3 min

Transport for O-RAN — fronthaul switching

Fronthaul Ethernet switches with timing-aware scheduling and low-latency forwarding.

interactive3 min

Lab: Transport network troubleshooting

Diagnose and resolve transport faults across MPLS, timing, and fronthaul scenarios.

lab5 min

Quiz: Transport operations

Test your knowledge of transport OAM, protection, SR-TE, and network slicing.

quiz5 min

Telecom Transport & Timing

21 interactive2 simulation3 labs4 quizzes