arXiv subjects

Gustavo B. Figueiredo

Publications and source records attributed to Gustavo B. Figueiredo.

4 recordsLinked to original sources

arXiv2026

A benchmarking framework for PON-based fronthaul network design

As mobile networks transition toward 5G and 6G RAN architectures, Passive Optical Networks (PONs) offer a critical solution for cost-effective fronthaul transport. However, the lack of standardized evaluation models in current literature makes an objective comparison of diverse optimization strategies difficult. This paper addresses this gap by proposing a unified benchmarking framework that standardizes cost catalogs and deployment scenarios. We formulate the network design problem using Integer Linear Programming (ILP) to establish optimality bounds and evaluate three scalable heuristic strategies: a Genetic Algorithm, K-Means Clustering (KMC+), and a graph-based Randomized Successive Splitter Assignment (RSSA+) algorithm. Simulation results show that a time-limited ILP remains a strong reference point, even when optimality is not reached. Despite being rarely used in prior fronthaul planning studies, it consistently yields solutions superior to those produced by standard heuristic methods. Among scalable approaches, RSSA+ reliably attains near-ILP performance while ensuring feasibility across all evaluated scenarios, which underscores the importance of advanced, constraint-aware algorithmic designs over simpler heuristics.

cs.NI↗

arXiv2021

Passive Optical Networking for 5G and Beyond 5G Low-Latency Mobile Fronthauling Services

Passive optical network (PON) technology offers an attractive cost-efficient alternative to support 5G and Beyond 5G mobile network fronthauling (MFH). However, MFH for such networks is challenging given its high bandwidth and strict latency requirements. To reduce these requirements, radio access network (RAN) functional splitting has been introduced in 5G networks; this provides more flexibility in resource allocation since the protocol stack is distributed between the centralized and the distributed units. In contrast to the conventional MFH requirement of the RF-PHY splitting, the MFH traffic produced by higher-layer splittings becomes more dependent on the actual user traffic load. By capitalizing on the new characteristics of the MFH traffic with RAN functional splitting, this article introduces a resource allocation mechanism to improve the performance of PONs serving MFH.

cs.NI↗

arXiv2017

On QoS-assured degraded provisioning in service-differentiated multi-layer elastic optical networks

The emergence of new network applications is driving network operators to not only fulfill dynamic bandwidth requirements, but offer various grades of service. Degraded provisioning provides an effective solution to flexibly allocate resources in various dimensions to reduce blocking for differentiated demands when network congestion occurs. In this work, we investigate the novel problem of online degraded provisioning in service-differentiated multi-layer networks with optical elasticity. Quality of Service (QoS) is assured by service-holding-time prolongation and immediate access as soon as the service arrives without set-up delay. We decompose the problem into degraded routing and degraded resource allocation stages, and design polynomial-time algorithms with the enhanced multi-layer architecture to increase the network flexibility in temporal and spectral dimensions. Illustrative results verify that we can achieve significant reduction of network service failures, especially for requests with higher priorities. The results also indicate that degradation in optical layer can increase the network capacity, while the degradation in electric layer provides flexible time-bandwidth exchange.

cs.NI↗

arXiv2015

Suporte à Mobilidade em Redes Mesh Sem Fio: estratégias comuns versus SDN

Wireless mesh networks have been presented as a robust, scalable and low cost solution to provide connectivity in long distance areas. However, given its nature, routing strategies must support seamless mobility of nodes while enabling operation with a good performance and fast self-recovery from links fault. The routing approaches that meet these requirements are based on protocols usually used in ad-hoc networks (e.g. OLSR and B.A.T.M.A.N.) and, more recently, in the SDN paradigm (e.g. OpenWiMesh), each one of them having its own pros and cons. Therefore, it is important to evaluate the benefits and impacts of each approach, taking into account models and metrics inherent to the mobility. In this paper, we propose a simplified implementation of mobility support in OpenWiMesh and evaluate its performance compared to other protocols, using differents mobility and data traffic models. The chosen metrics are based on packet loss, occupation of the links with control traffic and delay. Simulated results show that the SDN approach perform better than the classic protocols, beyond flexibility and programmability of SDN itself.

cs.NI↗