5G NR Wireless Access Technology - An Exhaustive Masterclass

Explore the 5G spectrum, from FR1 sub-6 gigahertz to millimeter-wave bands, and examine high-frequency operation, spectrum flexibility, numerology, and TDD-based duplex with beamforming and massive MIMO.

Learn how 5g nr spectrum uses resource blocks, subcarriers, and frames across numerologies, with flexible slot formats, guard bands, and the link between channel and transmission bandwidth.

Analyze the initial acquisition and random access in 5G NR, the protocol stack from physical to logical layers, and the key channels like PDCCH, PDSCH, PRACH, PUSCH, and PCH.

Learn how 5G NR uses downlink and uplink physical signals, including DMRS, CSI-RS, SRS, and the synchronization signal block, for channel estimation, phase noise compensation, and initial access.

Explore downlink and uplink data in 5G NR, focusing on carrier bandwidth parts, resource blocks, and band switching, with phase noise mitigation via phase tracking reference signals.

Explore how 5g nr uses flexible dmrs allocations for downlink and uplink, with type 1 and type 2 mappings to balance density, orthogonality, and low latency.

Learn how CSI-RS and SRS enable downlink and uplink channel estimation in 5G NR, with beamforming and MU-MIMO, while contrasting TDD reciprocity with FDD and noting CSR densities and configurations.

Explain uplink and downlink channel sounding in 5g nr, including CSI reporting via PMI, codebook metrics, and SARS for uplink channel estimation triggered by DCI.

Explore how 5G NR uses control resource sets and control channel elements to convey downlink control information, map it on the resource grid, and apply aggregation levels and search spaces.

Describe how downlink control information on the physical downlink control channel schedules downlink and uplink, detailing modulation, coding, antennas, and HARQ, with various DCI formats and RNTI scrambling.

Explore downlink data in 5g nr, showing how PCH/physical downlink shared channel carries user data, with scrambling, modulation, precoding, and virtual-to-physical resource mapping across multiple layers.

Explore 5g nr downlink and uplink data, including mapping type a and b, partial slot allocation, and how the receiver determines transport block size via rate matching and dci.

Explore the radio interface architecture of 5G NR, including the radio access network and core network, with emphasis on service-based architecture, network slicing, and control and user plane separation.

Learn the two-block network slicing architecture for 5g nr, featuring a multi-tier service, network function, and infrastructure layers, and a centralized slice controller for end-to-end lifecycle management and orchestration.

Examine how core network functions can run on either a 5g core or an lte core, enabling standalone and non-standalone operation with dual connectivity and split user and control planes.

Delve into the 5G NR radio interface architecture, from SDU to PDU with encapsulation and segmentation, and map QoS flows to data radio bearers in the RAN and core.

Explore radio interface architecture in 5G, detailing cures flows, uplink and downlink mapping to DRP, GBR vs non-GBR profiles, and 4G–5G differences in data bearer concepts.

Explain the AP architecture and how the service data adaptation protocol maps 5G quality of service flows to radio bearers, marking the QSI for uplink and downlink packets.

Explore the 5g nr radio interface by detailing three rlc modes—transparent, unacknowledged, and acknowledged—covering buffering, segmentation, reassembly, and feedback handling.

Explore the master and secondary cell architecture for 5g nr dual connectivity and its lte core network anchoring, detailing mac and channel mapping interfaces.

Explore the Mac layer architecture, including channel mapping and random access, and learn Mac procedures such as random access, scheduling, pch reception, and drx for energy-efficient uplink and downlink.

Explore HARQ with soft combining for robust error control in 5G NR, including MAC-layer HARQ management, dynamic TDD, and transport blocks split into code blocks and code block groups.

Examine the radio interface architecture of 5g nr wireless access technology, detailing the control plane and user plane operations, rrc state machine (idle, connected, inactive), paging, mobility, and session establishment.

Explore how idle and inactive mobility keeps devices reachable through paging, cell groups and tracking areas, and updates, and how connected mobility ensures seamless handover.

Explore multi-antenna transmission for diversity, directivity, and spatial multiplexing that boost data rates and reduce interference. See how antenna panels and polarization enable beamforming at millimeter waves to sustain links.

Learn the linear multi-antenna transmission model with a pre coding matrix W, exploring analog, digital, and hybrid beamforming, and the trade-offs shaping 5g nr wireless access design.

Explore how transmitter precoding and reference signals enable coherent downlink transmission. Understand CSI reporting, PMI codebooks, and type one and type two CSI for MU‑MIMO.

Explore mimo transmission concepts by selecting beam directions with W1 and W2 to enable rank-one or rank-two transmissions, polarization phasing, and multi-panel csi with beam and panel-based codebooks.

Explore how uplink MIMO uses coherence between device antenna ports, including full, partial, or no coherence, to select codebook-based transmission ranks, SRS sounding, and corresponding channel metrics.

Explore MIMO transmission part 6, detailing uplink and downlink beamforming, downlink measurements guiding non codebook based precoder and a precursor matrix W, with network-assisted beam selection via SRS and SSRI.

Examine downlink and uplink beam management, including transmitter and receiver site adjustments using reference signals, report configurations, and CSR references to optimize network beam directions.

Explore beam indication and transmission configuration indication (TCI) for downlink beam reuse. See how up to 64 DCI states enable dynamic signaling and beam recovery.

Explain beam failure detection using reference signal quality to identify candidate beams, then perform a two-step beam recovery request via random access to re-establish connectivity.

Explore forward error correction and hybrid automatic repeat request in 5G NR, examining MAC, RLC, and PDCP retransmission protocols, feedback trade-offs, and reliability during handover.

Explore how 5G NR uses forward error correction with a hybrid retransmission mechanism across MAC, RLC, and PDCP to balance fast feedback and reliable uplink and downlink delivery.

Explore how 5G NR uses HARQ with soft combining to recover lost packets, employing multiple parallel stop-and-wait processes, transport block and code block group retransmissions, and CRC-based error detection.

Understand soft combining in 5G NR, where incremental redundancy creates multiple coded bit sets representing the same information, yielding coding gains and guiding retransmissions.

Describe how the radio main control ioc protocol routes data from the pcp to the rlc, multiplexing logical channels into a transport channel and supporting modes: transparent, unacknowledged, and acknowledged.

this lecture explains 5G NR retransmission protocols, detailing uplink and downlink acknowledgement timing, new data indicators, and RC configured resources to support low-latency hybrid transmissions.

Explore how 5G NR multiplexes acknowledgement messages for multiple transfer blocks across carriers, comparing semi static and dynamic codebooks, and using downlink assignment index to ensure robust feedback.

Explain how the RLC in acknowledged mode detects missing PDUs, triggers retransmission via status reports, and uses sequence numbers and reassembly timers to ensure reliable delivery.

Examine 5G NR retransmission protocols, detailing the PDP's role in duplication, routing, and in-sequence delivery, with emphasis on discard timers and carrier diversity.