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Crosstalk-aware dynamic bandwidth allocation algorithm for confidential lightpath protection in next-generation passive optical networks.

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Titel: Crosstalk-aware dynamic bandwidth allocation algorithm for confidential lightpath protection in next-generation passive optical networks.
Autoren: Hu L, Lin Z, Wang J, Wang W, Zhao Y, Zhang J, Yang G
Quelle: Optics express [Opt Express] 2025 Oct 06; Vol. 33 (20), pp. 41699-41717.
Publikationsart: Journal Article
Sprache: English
Info zur Zeitschrift: Publisher: Optica Publishing Group Country of Publication: United States NLM ID: 101137103 Publication Model: Print Cited Medium: Internet ISSN: 1094-4087 (Electronic) Linking ISSN: 10944087 NLM ISO Abbreviation: Opt Express Subsets: PubMed not MEDLINE; MEDLINE
Imprint Name(s): Publication: Washington, DC : Optica Publishing Group
Original Publication: Washington, DC : Optical Society of America, 1997-
Abstract: Time and wavelength division multiplexed passive optical network (TWDM-PON) is a promising optical access infrastructure for supporting new emerging B5G applications, as it provides broadband capacity and high-rate transmission. With the increasing number of security-sensitive end-users, numerous confidential lightpaths (CLPs) are established over TWDM-PON to carry significant information. However, CLPs are vulnerable to crosstalk attacks due to non-ideal WDM-based devices, typically aimed at eavesdropping on the carried data or even disrupting services by exploiting crosstalk effects in the physical layer. Without optical-electrical-optical conversion of transmitted signals, crosstalk attacks can propagate to the entire network and are difficult to eliminate, severely leading to large-scale information leakage. To mitigate the impact of crosstalk attacks for CLPs, this paper presents a novel crosstalk-aware dynamic bandwidth allocation (CA-DBA) algorithm in the shared uplink of TWDM-PON. We first model the generation and propagation of two types of crosstalk attacks. Based on their characteristics, we propose a crosstalk-aware protection method by introducing the graph neural network (GNN) models to identify the attack probability. Following the protection method, a heuristic algorithm with three differentiated polling schemes is proposed, where the security-priority scheme ensures absolute security regardless of time cost, the time-priority scheme prioritizes meeting latency constraints even experiencing risks, and the time-efficient scheme balances them. Simulation results show that both security-priority and time-efficient schemes could reduce the leakage risk to 0 based on a promising detection performance with up to 100% accuracy using the ChebConv model. In contrast, time-priority would keep at least 6% links at high leakage risk, although it improves the time delay by about 48.04%.
Entry Date(s): Date Created: 20251111 Latest Revision: 20251111
Update Code: 20251111
DOI: 10.1364/OE.573457
PMID: 41215030
Datenbank: MEDLINE
Beschreibung
Abstract:Time and wavelength division multiplexed passive optical network (TWDM-PON) is a promising optical access infrastructure for supporting new emerging B5G applications, as it provides broadband capacity and high-rate transmission. With the increasing number of security-sensitive end-users, numerous confidential lightpaths (CLPs) are established over TWDM-PON to carry significant information. However, CLPs are vulnerable to crosstalk attacks due to non-ideal WDM-based devices, typically aimed at eavesdropping on the carried data or even disrupting services by exploiting crosstalk effects in the physical layer. Without optical-electrical-optical conversion of transmitted signals, crosstalk attacks can propagate to the entire network and are difficult to eliminate, severely leading to large-scale information leakage. To mitigate the impact of crosstalk attacks for CLPs, this paper presents a novel crosstalk-aware dynamic bandwidth allocation (CA-DBA) algorithm in the shared uplink of TWDM-PON. We first model the generation and propagation of two types of crosstalk attacks. Based on their characteristics, we propose a crosstalk-aware protection method by introducing the graph neural network (GNN) models to identify the attack probability. Following the protection method, a heuristic algorithm with three differentiated polling schemes is proposed, where the security-priority scheme ensures absolute security regardless of time cost, the time-priority scheme prioritizes meeting latency constraints even experiencing risks, and the time-efficient scheme balances them. Simulation results show that both security-priority and time-efficient schemes could reduce the leakage risk to 0 based on a promising detection performance with up to 100% accuracy using the ChebConv model. In contrast, time-priority would keep at least 6% links at high leakage risk, although it improves the time delay by about 48.04%.
ISSN:1094-4087
DOI:10.1364/OE.573457