Papers & Conferences

AI-based Autonomic & Scalable Security Management Architecture for Secure Network Slicing in B5G
May 2022
Chafika Benza and Tarik Taleb and JaeSeung Song
IEEE Network Magazine
The vital importance of securing 5G and beyond networks while meeting their stringent performance requirements has promoted the recent shift towards fully automated and smart security management. In this paper, we introduce a novel autonomic and cognitive security management framework that empowers fine-grained zero-touch security management through different levels (i.e., network functions, sub-slice, and slice) and different administrative and technological domains. We showcase the compliance of the proposed framework with the ongoing standards (e.g., ZSM, 3GPP, and NFV) and demonstrate its feasibility by advocating for potential open source solutions to implement its functional blocks in a cloud-native service-based environment.
Jettisoning Junk Messaging in the Era of End-to-End Encryption: A Case Study of WhatsApp
April 2022
Pushkal Agarwal, Aravindh Raman, Damiola Ibosiola, Nishanth Sastry , Gareth Tyson, Kiran Garimella
WWW '22: Proceedings of the ACM Web Conference 2022
WhatsApp is a popular messaging app used by over a billion users around the globe. Due to this popularity, understanding misbehavior on WhatsApp is an important issue. The sending of unwanted junk messages by unknown contacts via WhatsApp remains understudied by researchers, in part because of the end-to-end encryption offered by the platform. We address this gap by studying junk messaging on a multilingual dataset of 2.6M messages sent to 5K public WhatsApp groups in India. We characterise both junk content and senders. We find that nearly 1 in 10 messages is unwanted content sent by junk senders, and a number of unique strategies are employed to reflect challenges faced on WhatsApp, e.g., the need to change phone numbers regularly. We finally experiment with on-device classification to automate the detection of junk, whilst respecting end-to-end encryption.
DSM-MoC as Baseline: Reliability Assurance via Redundant Cellular Connectivity in Connected Cars
February 2022
Emeka Obiodu; Aravindh Raman; Abdullahi Abubakar; Simone Mangiante; Nishanth Sastry; Hamid Aghvami
IEEE Transactions on Network and Service Management
Connected Cars (CCs) and vehicle-to-everything (V2X) use cases require stringent reliability for safety and non-safety uses. With increasing network softwarisation, it has become easier to use multiple, redundant connectivity options instead of relying on a single network connectivity. But where should these redundant connections be managed? Is it at a network provider’s core network -i.e. supply side managed (SSM) -or at the CC -i.e. demand side managed (DSM)? In our work, we investigate the use of SSM and DSM for CCs on four separate days and across 800 kilometers of major / minor roads in South East England. For Day 1, we captured performance indicators, and determined hypothetical multi-operator configurations for four UK providers and a global Universal SIM. For Day 2, 3 & 4, we built and deployed a test-bed to actually implement network switching and understand performance (incl. for TCP & UDP) either on the road or in a stationary location. Based on our results, we make three contributions. First, we show that DSM can deliver superior performance for CCs more than any individual network (up to 28 percentage points in a hypothetical scenario), or SSM which had up to 4.8x longer page load times. Second, unlike other smartphone-only studies, our system-level study demonstrates that improvements of at least 12% can be obtained in a practical DSM field implementation for a CC. Third, we confirm that the advantage of DSM in a field implementation is higher for UDP traffic (23% better latency) compared to TCP (13%).
Cloud-based XR Services: A Survey on Relevant Challenges and Enabling Technologies
February 2022
Theodoros Theodoropoulos, Antonios Makris, Abderrahmane Boudi, Tarik Taleb, Uwe Herzog, Luis Rosa, Luis Cordeiro, Konstantinos Tserpes, Elena Spatafora, Alessandro Romussi, Enrico Zschau, Manos Kamarianakis, Antonis Protopsaltis, George Papagiannakis, and Patrizio Dazzi
Journal of Networking and Networking Applications
In recent years, the emergence of XR (eXtended Reality) applications, including Holography, Augmented, Virtual and Mixed Reality, has resulted in the creation of rather demanding requirements for Quality of Experience (QoE) and Quality of Service (QoS). In order to cope with requirements such as ultra-low latency and increased bandwidth, it is of paramount importance to leverage certain technological paradigms. The purpose of this paper is to identify these QoE and QoS requirements and then to provide an extensive survey on technologies that are able to facilitate the rather demanding requirements of Cloud-based XR Services. To that end, a wide range of enabling technologies are explored. These technologies include e.g. the ETSI (European Telecommunications Standards Institute) Multi-Access Edge Computing (MEC), Edge Storage, the ETSI Management and Orchestration (MANO), the ETSI Zero touch network & Service Management (ZSM), Deterministic Networking, the 3GPP (3rd Generation Partnership Project) Media Streaming, MPEG’s (Moving Picture Experts Group) Mixed and Augmented Reality standard, the Omnidirectional MediA Format (OMAF), ETSI’s Augmented Reality Framework etc.
Deterministic Latency/Jitter-aware Service Function Chaining over Beyond 5G Edge Fabric
February 2022
Hao Yu, Tarik Taleb, and Jiawei Zhang
IEEE Transactions on Network and Service Management
Deterministic Networking (DetNet) has recently attracted much attention. It aims at studying the deterministic bounded latency and low latency variation for time-sensitive applications (e.g., industrial automation). To improve the quality of service (QoS) guarantee and make the network management efficient, it is desirable for Internet Service Provider (ISP) to obtain an optimal service function chain (SFC) provision strategy while providing deterministic service performance for the time-sensitive applications. In this paper, we will study the deterministic SFC lifetime management problem in beyond 5G edge fabric with the objective of maximizing the overall profits and ensuring the deterministic latency and jitter of SFC requests. We first formulate this problem as a mathematical model with the maximal profits for ISP. Then, the novel Deterministic SFC Deployment algorithm (Det-SFCD) and SFC Adjustment algorithm (Det-SFCA) due to traffic load variation are proposed to efficiently solve the SFC lifetime management problem. Extensive simulation results show that our proposed algorithms can achieve better performance in terms of SFC request acceptance rates, overall profits and latency variation compared with the benchmark algorithm.
CHARITY Project presents the highlights of the project developments
May 2022
Fermin Calvo
Second workshop on the future of XR: Current ecosystem and upcoming opportunities
Fermin Calvo presented the highlights of the CHARITY project during the "2nd Workshop on the future of XR: Current ecosystem and upcoming opportunities" organised by H2020 ARETE and H2020 iv4xr projects.
Cyango Presentation and what we are doing with CHARITY
April 2022
João Rodrigues
7th International XR Conference - ISCTE
João Rodrigues from Dotesfera presented their ongoing work on CHARITY and Cyango, the application behind the VR Tour creator use case.
CHARITY’s Holographic Assistant Use Case
December 2021
Uwe Herzog
Horizon Cloud Summit 2021
Uwe Herzog as coordinator of the CHARITY Project presented at “‘Success Stories and Use Cases from the European Cloud Community” session of H-Cloud Summit 2021, the CHARITY’s holographic assistant use case.
The future of XR Services in the wake of 6G
November 2021
Luis Cordeiro
International Symposium on 6G Networking
Luis Cordeiro from OneSource presented at the International Symposium on 6G Networking in Lisbon the future of XR Services, their upcoming network and computing challenges and the role of 6G in addressing them.
Cyango and VR Tour Creator
November 2021
João Rodrigues
Web Summit Lisbon 2021
Dotesfera participated on Web Summit Lisbon 2021, a popular technology event where it showcased Cyango, storytelling VR tool