A database for publications published by researchers and students at SimulaMet.
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- Journal articles (128)
- Books (5)
- Edited books (2)
- Proceedings, refereed (141)
- Book chapters (4)
- Talks, keynote (11)
- PhD theses (5)
- Proceedings, non-refereed (15)
- Posters (6)
- Technical reports (12)
- Talks, invited (146)
- Talks, contributed (15)
- Public outreach (48)
- Miscellaneous (12)
Journal articles
Finding shortest and nearly shortest path nodes in large substantially incomplete networks by hyperbolic mapping
Nature Communications 14 (2023).Status: Published
Finding shortest and nearly shortest path nodes in large substantially incomplete networks by hyperbolic mapping
<p>Dynamic processes on networks, be it information transfer in the Internet, contagious spreading in a social network, or neural signaling, take place along shortest or nearly shortest paths. Computing shortest paths is a straightforward task when the network of interest is fully known, and there are a plethora of computational algorithms for this purpose. Unfortunately, our maps of most large networks are substantially incomplete due to either the highly dynamic nature of networks, or high cost of network measurements, or both, rendering traditional path finding methods inefficient. We find that shortest paths in large real networks, such as the network of protein-protein interactions and the Internet at the autonomous system level, are not random but are organized according to latent-geometric rules. If nodes of these networks are mapped to points in latent hyperbolic spaces, shortest paths in them align along geodesic curves connecting endpoint nodes. We find that this alignment is sufficiently strong to allow for the identification of shortest path nodes even in the case of substantially incomplete networks, where numbers of missing links exceed those of observable links. We demonstrate the utility of latent-geometric path finding in problems of cellular pathway reconstruction and communication security.</p>
Afilliation | Communication Systems |
Project(s) | The Center for Resilient Networks and Applications |
Publication Type | Journal Article |
Year of Publication | 2023 |
Journal | Nature Communications |
Volume | 14 |
Number | 186 |
Publisher | Nature |
Approximate Bayesian Inference Based on Expected Evaluation
Bayesian Analysis 1, no. 1 (2023).Status: Published
Approximate Bayesian Inference Based on Expected Evaluation
Approximate Bayesian computing (ABC) and Bayesian Synthetic likelihood (BSL) are two popular families of methods to evaluate the posterior distribution when the likelihood function is not available or tractable. For existing variants of ABC and BSL, the focus is usually first put on the simulation algorithm, and after that the form of the resulting approximate posterior distribution comes as a consequence of the algorithm. In this paper we turn this around and firstly define a reasonable approximate posterior distribution by studying the distributional properties of the expected discrepancy, or more generally an expected evaluation, with respect to generated samples from the model. The resulting approximate posterior distribution will be on a simple and interpretable form compared to ABC and BSL.
Secondly a Markov chain Monte Carlo (MCMC) algorithm is developed to simulate from the resulting approximate posterior distribution. The algorithm was evaluated on a synthetic data example and on the Stepping Stone population genetics model, demonstrating that the proposed scheme has real world applicability. The algorithm demonstrates competitive results with the BSL and sequential Monte Carlo ABC algorithms, but is outperformed by the ABC MCMC.
Afilliation | Communication Systems, Machine Learning |
Project(s) | Department of Holistic Systems |
Publication Type | Journal Article |
Year of Publication | 2023 |
Journal | Bayesian Analysis |
Volume | 1 |
Issue | 1 |
Date Published | Jan-01-2023 |
Publisher | Project euclid |
URL | https://projecteuclid.org/journals/bayesian-analysis/volume--1/issue--1/... |
DOI | 10.1214/23-BA1368 |
Proxy Path Scheduling and Erasure Reconstruction for Low Delay mmWave Communication
IEEE Communications Letters 27, no. 6 (2023): 1649-1653.Status: Published
Proxy Path Scheduling and Erasure Reconstruction for Low Delay mmWave Communication
Afilliation | Communication Systems |
Project(s) | The Center for Resilient Networks and Applications, Information Theory Section |
Publication Type | Journal Article |
Year of Publication | 2023 |
Journal | IEEE Communications Letters |
Volume | 27 |
Issue | 6 |
Pagination | 1649-1653 |
Date Published | 06/2023 |
Publisher | IEEE |
ISSN | 1558-2558 |
Keywords | erasure reconstruction, mmWave, Multipath scheduling |
URL | https://ieeexplore.ieee.org/document/10107383 |
DOI | 10.1109/LCOMM.2023.3269526 |
Opportunistic CPU Sharing in Mobile Edge Computing Deploying the Cloud-RAN
IEEE Transactions on Network and Service Management (2023): 1.Status: Published
Opportunistic CPU Sharing in Mobile Edge Computing Deploying the Cloud-RAN
Afilliation | Communication Systems |
Project(s) | The Center for Resilient Networks and Applications, SMIL: SimulaMet Interoperability Lab |
Publication Type | Journal Article |
Year of Publication | 2023 |
Journal | IEEE Transactions on Network and Service Management |
Pagination | 1 - 1 |
Date Published | september/2023 |
Publisher | IEEE |
Place Published | Transactions on Network and Service Management |
ISSN | 1932-4537 |
Other Numbers | 2373-7379 |
URL | https://ieeexplore.ieee.org/document/10214346/http://xplorestaging.ieee.... |
DOI | 10.1109/TNSM.2023.3304067 |
Network-Aware RF-Energy Harvesting for Designing Energy Efficient IoT Networks
Elsevier Internet of Things 22 (2023).Status: Published
Network-Aware RF-Energy Harvesting for Designing Energy Efficient IoT Networks
Afilliation | Communication Systems |
Project(s) | Signal and Information Processing for Intelligent Systems |
Publication Type | Journal Article |
Year of Publication | 2023 |
Journal | Elsevier Internet of Things |
Volume | 22 |
Date Published | 07/2023 |
Publisher | Elsevier Internet of Things |
ISSN | 2542-6605 |
DOI | 10.1016/j.iot.2023.100770 |
Bottleneck Identification in Cloudified Mobile Networks based on Distributed Telemetry
Transactions on Mobile Computing (2023): 1-18.Status: Published
Bottleneck Identification in Cloudified Mobile Networks based on Distributed Telemetry
Cloudified mobile networks are expected to deliver a multitude of services with reduced capital and operating expenses. A characteristic example is 5G networks serving several slices in parallel. Such mobile networks, therefore, need to ensure that the SLAs of customised end-to-end sliced services are met. This requires monitoring the resource usage and characteristics of data flows at the virtualised network core, as well as tracking the performance of the radio interfaces and UEs. A centralised monitoring architecture can not scale to support millions of UEs though. This paper, proposes a 2-stage distributed telemetry framework in which UEs act as early warning sensors. After UEs flag an anomaly, a ML model is activated, at network controller, to attribute the cause of the anomaly. The framework achieves 85% F1-score in detecting anomalies caused by different bottlenecks, and an overall 89% F1-score in attributing these bottlenecks. This accuracy of our distributed framework is similar to that of a centralised monitoring system, but with no overhead of transmitting UE-based telemetry data to the centralised controller. The study also finds that passive in-band network telemetry has the potential to replace active monitoring and can further reduce the overhead of a network monitoring system.
Afilliation | Communication Systems |
Project(s) | The Center for Resilient Networks and Applications, NorNet, SMIL: SimulaMet Interoperability Lab, Simula Metropolitan Center for Digital Engineering, Simula Metropolitan Center for Digital Engineering |
Publication Type | Journal Article |
Year of Publication | 2023 |
Journal | Transactions on Mobile Computing |
Pagination | 1–18 |
Publisher | IEEE |
ISSN | 1558-0660 |
Keywords | Anomaly, Bottleneck, classification, congestion, Mobile Cloud Network, Telemetry |
URL | https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10239332 |
DOI | 10.1109/TMC.2023.3312051 |
LGCC: A Novel High-Throughput and Low Delay Paradigm Shift in Multi-Hop Congestion Control
IEEE/ACM Transactions on Networking (2023): 1-16.Status: Published
LGCC: A Novel High-Throughput and Low Delay Paradigm Shift in Multi-Hop Congestion Control
Technological advancements have provided wireless links with very high data rate capacity for 5G/6G mobile networks and WiFi 6, which will be widely deployed by 2025. However, the capacity can have substantial fluctuations, violating the assumption at the transport layer that the capacity is (almost) steady. In this paper, we present a general and efficient, yet deployable solution to this problem through a novel design empowered with a rich theory, allowing a significantly improved experience in using new technologies, especially mobile cellular services. We employ the well-known theory of food-chain models in biology, where a bottleneck link can be modeled as prey, while flows are predators. We extend this model to a chain of predators and preys to form a multi-hop congestion controller, called LGCC. Through simulation evaluation with real-life 5G traces we show the effectiveness of LGCC, compared with the state-of-the-art ABC (Accel-Brake Control). Our results show an order of magnitude bottleneck queuing delay decrease, with only a small decrease in throughput because LGCC tries to never exceed link capacities. LGCC’s design can additionally open a new paradigm in stable multi-hop congestion control and flow aggregation.
Afilliation | Communication Systems |
Project(s) | The Center for Resilient Networks and Applications |
Publication Type | Journal Article |
Year of Publication | 2023 |
Journal | IEEE/ACM Transactions on Networking |
Pagination | 1-16 |
Date Published | 08/2023 |
Publisher | IEEE |
ISSN | 1558-2566 |
Keywords | 5G/6G, food chain, logistic growth, Multi-hop congestion control |
URL | https://ieeexplore.ieee.org/document/10216921 |
DOI | 10.1109/TNET.2023.3301291 |
Miscellaneous
Increasing Availability of Subsea Telecom Infrastructure Through Monitoring Vibrations in Optical Fibre Subsea Cables
Submarine Telecoms Forum, 2023.Status: Published
Increasing Availability of Subsea Telecom Infrastructure Through Monitoring Vibrations in Optical Fibre Subsea Cables
Society’s reliance on telecommunication infrastructure continues to grow as both energy and telecommunications solutions share mutual dependencies. This dependency calls for increased monitoring of fibre networks and fibre optic subsea cables, which serve as the backbone of connectivity for all digital communications.
Distributed Acoustic Sensing (DAS) and State of Polari- sation (SoP) monitoring provide real-time measurements of vibrations and potential mechanical interference which could impact the cable. Implementation of these sensing technologies mitigate risk to the infrastructure, preventing equipment failure and downtime. In particular, any unexpected movements caused by subsea activities such as passing trawlers, hooking of equipment on the seabed, and any geophysical phenomena can be traced so that appropriate action could be taken.
This article will explain the capability and benefits of the monitoring system and how Tampnet utilises this system for monitoring its vast subsea and terrestrial cable systems.
Afilliation | Communication Systems |
Project(s) | The Center for Resilient Networks and Applications, GAIA |
Publication Type | Miscellaneous |
Year of Publication | 2023 |
Publisher | Submarine Telecoms Forum |
URL | https://subtelforum.com/subtel-forum-magazine-131-regional-systems/ |
PhD theses
Control Principles for Autonomous Communication Networks
In Oslomet, 2023.Status: Published
Control Principles for Autonomous Communication Networks
The growing complexity of communication networks and the explosion of network traffic have made the task of managing these networks exceedingly hard. A potential approach for striking this increasing complexity is to build an autonomous self-driving network that can measure, analyze and control itself in real time and in an automated fashion with- out direct human intervention. In this thesis, we focus on realizing such an autonomous network leveraging state-of-the-art networking technologies along with artificial intelli- gence and machine learning techniques. Toward this goal, we exploit different learning paradigms to automate network management. First, we propose supervised machine learning methods to detect increases in delays in mobile broadband networks. Further, considering the challenges of supervised learning in networking applications, we present a novel real-time distributed architecture for detecting anomalies in mobile network data in an unsupervised fashion. It also involves a collaborative framework for knowledge sharing between the distributed probes in the network to improve the overall system accuracy. Second, we propose a novel deep reinforcement learning based control framework for op- timizing resources utilization while minimizing performance degradation in multi-slice Radio Access Network (RAN) through a set of diverse control actions. We explore both centralized and distributed control architectures. Last, we design a framework for timely collecting telemetry, detecting and attributing outages in mobile networks. We evaluate our framework on a software defined virtualised testbed that resembles a cloudified mobile network.
Afilliation | Communication Systems |
Project(s) | The Center for Resilient Networks and Applications |
Publication Type | PhD Thesis |
Year of Publication | 2023 |
Degree awarding institution | Oslomet |
Proceedings, refereed
On the realization of Cloud-RAN on Mobile Edge Computing
In International Conference on Advanced Information Networking and Applications (AINA-2023). 655th ed. Vol. 3. Lecture Notes in Networks and Systems: Springer, 2023.Status: Published
On the realization of Cloud-RAN on Mobile Edge Computing
Afilliation | Communication Systems |
Project(s) | The Center for Resilient Networks and Applications |
Publication Type | Proceedings, refereed |
Year of Publication | 2023 |
Conference Name | International Conference on Advanced Information Networking and Applications (AINA-2023) |
Volume | 3 |
Edition | 655 |
Date Published | 03/2023 |
Publisher | Springer |
Place Published | Lecture Notes in Networks and Systems |
ISBN Number | 978-3-031-28693-3 |