A5090175476- Advanced MIMO Systems Optimization
- Age of Information Optimization
- IoT Networks and Protocols
- Cooperative Communication and Network Coding
- Satellite Communication Systems
- Advanced Wireless Network Optimization
- Opportunistic and Delay-Tolerant Networks
- Wireless Communication Networks Research
- IoT and Edge/Fog Computing
- Vehicular Ad Hoc Networks (VANETs)
- Interconnection Networks and Systems
- Advanced Wireless Communication Technologies
- Distributed Sensor Networks and Detection Algorithms
- Wireless Communication Security Techniques
- Congenital Heart Disease Studies
- Energy Harvesting in Wireless Networks
- Atomic and Subatomic Physics Research
- Distributed systems and fault tolerance
- Spacecraft Design and Technology
- Wireless Body Area Networks
- Advanced Wireless Communication Techniques
- Mobile Ad Hoc Networks
- Full-Duplex Wireless Communications
- Power Line Communications and Noise
- Space Satellite Systems and Control
Aalborg University
2012-2024
Universidad de Málaga
2006-2024
Linköping University
2021
Connect
2021
University of Reggio Calabria
2020
Medpace (United States)
2017
Nokia (Finland)
2014-2015
Nokia (Australia)
2014
Aalborg Portland (Denmark)
2014
The next frontier towards truly ubiquitous connectivity is the use of Low Earth Orbit (LEO) small-satellite constellations to support 5G and Beyond-5G (B5G) networks. Besides enhanced mobile broadband (eMBB) massive machine-type communications (mMTC), LEO can ultra-reliable (URC) with relaxed latency requirements a few tens milliseconds. Small-satellite impairments low orbits pose major challenges design performance these networks, but also open new innovation opportunities. This paper...
We present our vision for a departure from the established way of architecting and assessing communication networks, by incorporating semantics information, defined not necessarily as meaning messages, but their significance, possibly within real-time constraint, relative to purpose data exchange. argue that research efforts must focus on laying theoretical foundations redesign entire process information generation, transmission, usage networked systems in unison developing advanced semantic...
With the advent of 5G technology, notion <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">latency</i> got a prominent role in wireless connectivity, serving as proxy term for addressing requirements real-time communication. As systems evolve toward 6G, ambition to immerse digital into physical reality will increase. Besides making more stringent, this immersion bring notions time, simultaneity, presence, and causality new level complexity. A...
The promise of ubiquitous and super-fast connectivity for the upcoming years will be in large part fulfilled by addition base stations spectral aggregation. resulting very dense networks (DenseNets) face a number technical challenges. Among others, interference emerges as an old acquaintance with new significance. As matter fact, conditions role aggressor victim depend to extent on density scenario. To illustrate this, downlink statistics different 3GPP simulation scenarios more irregular...
We address the fundamental tradeoffs among latency, reliability and throughput in a cellular network. The most important elements influencing KPIs 4G network are identified, inter-relationships them is discussed. use effective bandwidth capacity theory as analytical framework for calculating maximum achievable rate given latency constraint. analysis conducted simplified LTE network, providing baseline - yet powerful insight of main tradeoffs. Guidelines to extend more complex systems also...
In this article we present two promising practical use cases for simple multicell cooperation LTE-Advanced heterogeneous network scenarios with macro and small cells. For co-channel deployment cases, recommend the of enhanced interference coordination, or eICIC, to mitigate cross-tier ensure sufficient offload users from It is shown how eICIC benefit maximized by using a distributed inter-base station control framework dynamic adjustment essential parameters. Second, where cells are deployed...
Ultra-reliable low-latency communications (URLLC) entail the transmission of sporadic and small packets, with low latency very high reliability. Among many potential areas optimization for URLLC, problems large delays during HARQ retransmissions, inaccurate link adaptation as a consequence rapidly-varying interference conditions are studied. The former is addressed by reducing TTI length round-trip time, compared to what used in LTE; whereas including low-pass filtered information CQI report...
With numerous ongoing deployments owned by private companies and startups, dense satellite constellations deployed in low Earth orbit (LEO) will play a major role the near future of wireless communications. In addition, 3rd Generation Partnership Project (3GPP) has efforts to integrate satellites into 5G beyond-5G networks. Nevertheless, challenges must be overcome fully exploit connectivity capabilities constellations. These are mainly consequence individual small satellites, along with...
Age of Information (AoI) has become an important concept in communications, as it allows system designers to measure the freshness information available remote monitoring or control processes. However, its definition tacitly assumes that new is used at any time, which not always case: instants collected and may be dependent on a certain query process, resource-constrained environments such most Internet Things (IoT) use cases require precise timing fully exploit limited transmissions. In...
Age of Information (AoI) is a critical metric for several Internet Things (IoT) applications, where sensors keep track the environment by sending updates that need to be as fresh possible. The development edge computing solutions has moved monitoring process closer sensor, reducing communication delays, but processing time node needs taken into account. Furthermore, reliable system design in terms freshness requires knowledge full distribution Peak AoI (PAoI), from which probability...
In real-time and high-resolution Earth observation imagery, Low Orbit (LEO) satellites capture images that are subsequently transmitted to ground create an updated map of area interest. Such maps provide valuable information for meteorology or environmental monitoring, but can also be employed in near-real time operation disaster detection, identification, management. However, the amount data generated by these applications easily exceed communication capabilities LEO satellites, leading...
This work analyzes the joint influence of channel fading and data outsourcing process in QoS metrics a wireless system. As first contribution, expressions effective bandwidth function (also known as capacity) for time-correlated Rayleigh under different adaptive rate policies are obtained. result allows us to analytically evaluate maximum constant information that can be transmitted over probabilistic delay constraint. Later, this Capacity with Probabilistic Delay Constraint C <sub...
LTE V2X is the response of 3GPP standardization body to high market expectations related vehicular communications for safety and infotainment services. To fulfill stringent requirements in terms reliability associated with applications, geolocation-based access (GLOC) has been proposed direct vehicle-to-vehicle (V2V) communication. Such a scheme aims at maximizing distance co-channel transmitters (i.e., transmitter that use same resources) while preserving low latency when accessing...
The arrival of the 5G NR provides a unique opportunity for introducing new inter-cell interference coordination (ICIC) mechanisms. objective is twofold: to better exploit benefits ICIC in coherence with rest radio resource management (RRM) principles 5G, and support services deployment scenarios. We propose several enhanced techniques. In uplink, pilot sequence configuration mitigates problem such pilots, which especially severe cell-edge users. downlink, coordinated small cell DTX aims at...
Ultra-reliable communications over wireless will open the possibility for a wide range of novel use cases and applications. In cellular networks, achieving reliable communication is challenging due to many factors, particularly fading desired signal interference. this regard, we investigate potential several techniques combat these main threats. The analysis shows that traditional microscopic multiple-input multiple-output schemes with 2×2 or 4×4 antenna configurations are not enough fulfil...
Different technical solutions are enabling the move from macro-only scenarios towards heterogeneous networks with a mixture of different base station types. In this paper we focus on multi-layer LTE-Advanced networks, and especially address aspects related to co-channel interference management. The network controlled time-domain enhanced inter-cell coordination (eICIC) concept is outlined by explaining benefits characteristics solution. Extensive system level performance results presented...
In this paper we study the downlink latency performance in a multi-user cellular network. We use flexible 5G radio frame structure, where TTI size is configurable on peruser basis according to their specific service requirements. Results show that at low system loads using short (e.g. 0.25 ms) an attractive solution achieve communications (LLC). The main benefits come from transmission delay required transmit payloads. However, as load increases, longer configurations with lower relative...
The classical definition of network delay has been recently augmented by the concept information timeliness, or Age Information (AoI). We analyze and AoI in a multi-hop satellite that relays status updates from 1, receiving uplink traffic ground devices, to K, using K-2 intermediate nodes. last node, is closest with connectivity station. formation modeled as queue M/M/1 systems connected series. scenario then generalized for case which all satellites receive ground, work at same time packets...
Modern satellites deployed in low Earth orbit (LEO) accommodate processing payloads that can be exploited for edge computing. Furthermore, by implementing inter-satellite links, the LEO a constellation route data end-to-end (E2E). These capabilities to greatly improve current store-and-forward approaches surveillance systems. However, they give rise an NP-hard problem of joint communication and computing resource management (RM). In this paper, we propose algorithm allows select between...
This letter considers a remote control Autonomous Guided Vehicle (AGV), where packets carrying sensory data and information are sent through time-correlated wireless fading channel. We illustrate there is an inherent dependency between the rate resulting accuracy for such system. propose goal-oriented solution, in which transmission continuously adapted according to Age-of-Loop metric achieve precise trajectory of AGV. The numerical analysis shows that proposed solution provides higher at...
The support of mission-critical communication (MCC) opens the possibility to implement a broad range novel applications. V2X for traffic safety and automation is, among others, one these innovative applications expected bring big benefits society: accidents are prevented, driving times reduced, carbon dioxide is saved. In this regard, we first present system model fundamental definitions reliability, latency availability. Relying on definitions, systematic review requirements huge variety...
Taking inspiration from linguistics, the communications theoretical community has recently shown a significant recent interest in pragmatic , or goal-oriented, communication. In this paper, we tackle problem of communication with multiple clients different, and potentially conflicting, objectives. We capture goal-oriented aspect through metric Value Information (VoI), which considers estimation remote process as well timing constraints. However, most common definition VoI is simply Mean...