5G O-RAN: Architecture and Key Principles (Open RAN)

Explore the anatomy of a cellular network, from access, core, and data networks to the 5G radio access network, including distributed and centralized RAN, fronthaul, disaggregation, and cloud RAN.

Explore how global 5G standardization unfolds from the ITU vision to 3GPP specifications, including intergovernmental roles, the three divisions, and the evolution from 2G to 5G.

Explain how the O-ran Alliance extends GPP specifications with open interfaces and disaggregation. Describe the specifications, software, and testing divisions, plus Odyssey centers and conformance badges under the Linux Foundation.

Explore the O-RAN architecture, including the centralized and distributed unit split and F1 interfaces; learn how near real time and non real time RICs support modular apps and cloud deployment.

Explore the three o-ran control loops: real-time, near real-time, and non real-time, and how beamforming, resource scheduling, handover, QoS, dual connectivity, orchestration, and policy-based suggestions drive network intelligence.

Analyze the higher layer split in O-RAN architecture, distributing RC and PCP in the queue between SIU and DU, balancing throughput, latency, and centralization benefits.

Analyze the lower layer split in orange architecture for O-RAN, detailing how moving functions between audio and other units sets throughput and latency.

Explore how cloud infrastructure supports O-RAN applications, tracing the shift from legacy physical network functions to virtualized and cloud-native approaches with containers and microservices.

Explain the cloud platform hardware and software layers for O-RAN, including compute, networking, storage, and hardware accelerators like FPGA or GPU to meet timing and data rate needs.

Explore how the o-cloud platform software layers, including the operating system, runtime, accelerated and network drivers, storage, and hypervisor or container runtime, enable virtualization and timing synchronization for 5G o-ran.

SMO standardizes the management and operations of radio access networks, offering lifecycle management, observability and assurance, and data-driven automation to reduce deployment and maintenance costs.

Explore how the non real time rig enables policy based guidance, data analytics, and configuration management through apps on the non real time rig.

Deploys near real time RIC to optimize radio resources with x apps, interfacing with non real time RIC via A1 and with the network via E2 to apply policy recommendations.

Explains how the E2 interface links the near real-time RAN to radio access nodes, enabling publish/subscribe data and remote control via E2AP and E2SM protocols for mobility management and handover.

Explains the open fronthaul as the lower layer split in O-RAN, the open interface between ODU and RU, including Q plane, S plane, timing distribution, and the management plane.