Publications

Reconstruction of geometric random graphs with the Simple algorithm

Clara Stegehuis and Lotte Weedage. arXiv: 2407.18591, 2024

Graph reconstruction can efficiently detect the underlying topology of massive networks such as the Internet. Given a query oracle and a set of nodes, the goal is to obtain the edge set by performing as few queries as possible. An algorithm for graph reconstruction is the Simple algorithm (Mathieu & Zhou, 2023), which reconstructs bounded-degree graphs in Õ (n3/2) queries. We extend the use of this algorithm to the class of geometric random graphs with connection radius r∼nk, with diverging average degree. 

National roaming as a fall-back or default?

Lotte Weedage, Syllas R. C. Magalhães and Suzan Bayhan. IOCRCI workshop, IFIP networking 2023.

Mobile network operators a country operate independent of each other, although inter-operator collaboration such as national roaming can offer benefits in terms of resilience, coverage,  throughput, and energy efficiency. In this work, we quantify the benefits in terms of coverage, capacity, and power consumption that can be gained by national roaming as a fallback strategy and as a default strategy wherein all MNOs are operated as a single network. 

Resource sharing in wireless networks with co-location

Clara Stegehuis and Lotte Weedage. PLOS ONE 19(2), 2024

With more and more demand from devices to use wireless communication networks, there has been an increased interest in resource sharing among operators, to give a better link quality. However, in the analysis of the benefits of resource sharing among these operators, the important factor of co-location is often overlooked. Indeed, often in wireless communication networks, different operators co-locate: they place their base stations at the same locations due to cost efficiency.  We therefore use stochastic geometry to investigate the effect of co-location on the benefits of resource sharing. 

On the resilience of cellular networks: how can national roaming help?

Lotte Weedage, Syllas R. C. Magalhães, Clara Stegehuis, Suzan Bayhan. IEEE Transactions on Network and Service Management, 2024

Under national roaming, subscribers of a certain mobile network operator can receive an internet connection from any other operator, which provides benefits in terms of throughput and resilience for a user. We investigate what the benefits for national roaming are in the Netherlands, using available subscriber and base station data.

Science slam

BEAM-ALIGN: distributed user association for mmWave networks with multi-connectivity

Lotte Weedage, Clara Stegehuis and Suzan Bayhan. arXiv: 2206.13166, 2022

In a 5G mmWave network with beamforming, how should we connect users to base stations? And, more importantly, can we find a near-optimal user association for each base station separately, without knowing the entire network state? We devise a heuristic, "beam-align", that connects users based on the misalignment with the BS beam. Beam-align performs close-to optimal, and is robust under network failures such as rain and blockage.

Presentation Pitch

Degree distributions in AB random geometric graphs

Clara Stegehuis and Lotte Weedage. Physica A: Statistical Mechanics and its Applications (2021)

We provide degree distributions for AB random geometric graphs, in which points of type A connect to the closest k points of type B. The motivating example to derive such degree distributions is in 5G wireless networks with multi-connectivity, where users connect to their closest k base stations.

Locating highly connected clusers in large networks with HyperLogLog counters

Lotte Weedage, Nelly Litvak and Clara Stegehuis. Journal of Complex Networks, 2021

We introduce a new method to locate highly connected clusters in a network. Our proposed approach adapts the HyperBall algorithm to localize regions with a high density of small subgraph patterns in large graphs in a memory-efficient manner.

Presentation

Impact of multi-connectivity on channel capacity and outage probability in wireless networks

Lotte Weedage, Clara Stegehuis and Suzan Bayhan. IEEE Transactions on Vehicular Technology, 2023

We investigate whether the promises of multi-connectivity (higher throughput and reliability) also hold in such a setting where all users of a network are connected through multiple links in the downlink.  Our analysis shows that while the reliability increases, the per- user throughput always decreases for higher degrees of multi-connectivity.

Presentation  Pitch