Simulations of Quantum Protocol in Distributed Networks using ns-3
Author
Davidsen, Rasmus Hjøllund
Term
4. semester
Education
Publication year
2025
Abstract
Dette speciale undersøger, hvordan en nyligt foreslået protokol for sekventiel entanglement-swapping kan fungere i praktiske Ethernet-LAN. Med afsæt i tidligere designarbejde tilpasses klassiske lag-2-mekanismer ved at introducere Q2STP, en udvidelse der inddrager kvantelinks i rutevalg. En skræddersyet implementering af protokollen er udviklet og evalueret i netværkssimulatoren ns-3 på tværs af forskellige topologier og netværksforhold med fokus på ende-til-ende-latenstid. Simulationerne viser, at protokollen fungerer efter hensigten og afdækker klare tendenser: færre mellemliggende switche reducerer latenstid, men gevinsten skal afvejes mod udfordringerne ved længere kvantelinks. Arbejdet giver et implementeringsgrundlag og empirisk viden til at forbinde kvantenetværksprocedurer med eksisterende Ethernet-infrastruktur.
This thesis examines how a recently proposed protocol for sequential entanglement swapping can operate in practical Ethernet LANs. Building on prior design work, it adapts classical Layer 2 control by introducing Q2STP, an extension that incorporates quantum links into routing decisions. A custom implementation of the protocol is developed and evaluated using the ns-3 network simulator across varied topologies and network conditions, with an emphasis on end-to-end latency. Simulations indicate that the protocol functions as intended and reveal clear performance trends: reducing the number of intermediate switches lowers latency, but this benefit must be balanced against the challenges of longer quantum links. The work provides an implementation blueprint and empirical insight to guide the integration of quantum networking procedures with existing Ethernet infrastructure.
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