Software-Defined Networking (SDN)
Software-Defined Networking (SDN) involves the physical separation of the control plane functions from the forwarding functions. A typical SDN architecture is divided into three layers: the application layer, the control layer (where the SDN controller operates), and the physical infrastructure. These layers communicate with each other through APIs - northbound APIs for application-to-control communication and southbound APIs for control-to-infrastructure communication.
SDN enhances programmability and enables a higher degree of network automation and optimization. It also provides cloud-like capabilities within the architecture, allowing centralized computation and network control abstraction from the physical layer, data analysis algorithms, and system virtualization via virtual overlay networks. System virtualization supports one of the most critical features in 5G: network slicing.
Network slicing refers to the partitioning of a physical network into multiple virtual networks, each unique and optimized for specific services or applications. Each virtual network, or slice, can be configured with only the specific resources required to perform particular tasks - such as those needed for autonomous vehicles, IoT devices, and mobile services. The most significant advantage of this technology is the optimized and tailored allocation of resources to meet the demands of specific customers and market segments. Client services can be categorized into eMBB (enhanced Mobile Broadband), mMTC (massive Machine-Type Communications), and URLLC (Ultra-Reliable Low-Latency Communications), each with distinct requirements for throughput, bandwidth, latency, and robustness.
Network slicing is implemented through a combination of technologies including SDN, Software-Defined Radio (SDR), Network Functions Virtualization (NFV), data analytics, and automation.
Software-Defined Networking (SDN)
by sales@dgaequipment.com | Sep 18, 2025 | Classroom
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