Ioannis D. Moscholios

Ioannis D. Moscholios
University of Peloponnese | UOP · Informatics & Telecommunications

Professor

About

212
Publications
43,362
Reads
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2,083
Citations
Introduction
Ioannis D. Moscholios received the Dipl.-Eng. degree in Electrical & Computer Engineering (ECE) from the Univ. of Patras, Greece, in 1999, the M.Sc. degree in Spacecraft Tech. & Satellite Commun. from UCL, UK, in 2000 and the Ph.D. degree in ECE from the Univ. of Patras in 2005. From 2005 to 2009 he was in the CN Planning Group of Vodafone Greece. From 2009 to 2013, he was a Lecturer in the Dept. of Telecommun. Science & Technology, Univ of Peloponnese (UoP) . Now he is an Associate Prof. in the Dept. of Informatics & Telecommun., UoP. His main research interests are in Network Performance Evaluation. He has published 160 papers in journals & conferences and served as a Guest Editor in ΙΕΤ Commun., IET Networks, Mobile Information Systems. He serves in the TPC of IEEE ICC and Globecom.
Additional affiliations
June 2009 - February 2013
University of Peloponnese
Position
  • Lecturer

Publications

Publications (212)
Article
Full-text available
In this paper, a cloud radio access network (C-RAN) is considered where the baseband units form a pool of computational resource units (RUs) and are separated from the remote radio heads (RRHs). The RRHs are grouped into clusters based on their capacity in radio RUs. Each RRH serves different service-classes whose calls have different requirements...
Article
Full-text available
Designing, dimensioning, and optimization of communication networks resources and services have been inseparable parts of the development of telecommunications since the very beginning of their existence [...]
Article
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Advances in the fields of networking, broadband communications and demand for high-fidelity low-latency last-mile communications have rendered as-efficient-as-possible relaying methods more necessary than ever. This paper investigates the possibility of the utilization of cellular-enabled drones as aerial base stations in next-generation cellular n...
Chapter
First, we present the key features of teletraffic models while emphasizing on the classification of their parameters to arrive at a possible categorization. Second, we briefly discuss the relationship between teletraffic models and the Internet, and third, we present three representative multirate teletraffic loss models.
Article
Full-text available
In this paper we study a mobility-aware call admission control algorithm in a mobile hotspot. To this end, a vehicle is considered which has an access point with a fixed capacity. The vehicle alternates between stop and moving phases. When the vehicle is in the stop phase, it services new and handover calls by prioritizing them via a probabilistic...
Article
Full-text available
In this paper, a cloud radio access network (C-RAN) is considered where the baseband units form a pool of computational resource units and are separated from the remote radio heads (RRHs). Based on their radio capacity, the RRHs may form one or many clusters: a single cluster when all RRHs have the same capacity and multi-clusters where RRHs of the...
Article
Full-text available
In this paper, a cloud radio access network (C-RAN) is considered where the remote radio heads (RRHs) are separated from the baseband units which form a common pool of computational resource units. Depending on their capacity, the RRHs may form one or more clusters. Each RRH accommodates multiservice traffic, i.e., calls from different service-clas...
Article
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A considerable percentage of Internet of Things end-devices are characterised by mobility, a feature that adds extra complexity to protocols used in Wireless Sensor Networks. LoRa is one of the newly introduced wireless sensor protocols, capable of delivering messages in long distances and consuming low energy, features that make it proper for low...
Article
Real-time event detection and targeted decision making for emerging mission-critical applications require systems that extract and process relevant data from IoT sources in smart spaces. Oftentimes, this data is heterogeneous in size, relevance, and urgency, which creates a challenge when considering that different groups of stakeholders (e.g., fir...
Research
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The objective of this Special Issue is to bring together the state-of-the-art research contributions that address challenges in contemporary networks design, dimensioning and optimization towards the 6G networks.
Conference Paper
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Ultra-low latency connections for a massive number of devices are one of the main requirements of the next-generation tactile Internet-of-Things (TIoT). Grant-free non-orthogonal multiple access (GF-NOMA) is a novel paradigm that leverages the advantages of grant-free access and non-orthogonal transmissions, to deliver ultra-low latency connectivit...
Article
Full-text available
Numerous middleware application programming interfaces (APIs) and protocols were introduced in the literature in order to facilitate the application development of the Internet of Things (IoT). Such applications are built on reliable or even unreliable protocols that may implement different quality-of-service (QoS) delivery modes. The exploitation...
Article
Full-text available
In this paper, a link of fixed capacity is considered that services calls from different service-classes. Calls arrive in the link according to a Poisson process, have an initial (peak) bandwidth requirement while their service time is exponentially distributed. We model this system as a multirate loss system and analyze two different multirate los...
Article
Full-text available
A multi-cluster cloud radio access network (C-RAN) is considered in this paper where the remote radio heads (RRHs) form different clusters. A cluster includes RRHs that have the same radio resource unit capacity. In addition, all RRHs are separated from the common pool of computational resource units named baseband units. Each RRH accommodates call...
Article
The employment of Low-Power Wide Area Networks (LPWANs) has proven quite beneficial to the advancement of the Internet of Things (IoT) paradigm. The utilization of low power but long range communication links of the LoRaWAN technology promises low energy consumption, while ensuring sufficient throughput. However, due to LoRa’s original scheduling p...
Article
Full-text available
In this paper we consider a cloud radio access network (C-RAN) where the remote radio heads (RRHs) are separated from the baseband signal processing servers, named baseband units (BBUs). The latter forms a centralized pool of high-performance data center resources. To benefit from network function virtualization, we consider virtualized BBU (V-BBU)...
Article
In this paper we consider a link, characterized by specific capacity, that services multi-rate random or quasi-random traffic. Random traffic is generated by an infinite number of traffic sources, while quasi-random traffic is generated by a finite population of traffic sources. The link is modeled as a multi-rate loss system. Handover and new call...
Article
We consider a cloud radio access network (C-RAN) where the baseband signal processing servers, named baseband units (BBUs) are separated from the remote radio heads (RRHs). The RRHs form a single cluster while the BBUs form a pool of resources. Each RRH may accommodate random (Poisson) or quasi-random or bursty traffic. The latter is approximated v...
Article
Full-text available
In this paper, a cloud radio access network (C-RAN) is considered where the remote radio heads (RRHs) are separated from the baseband units (BBUs). The RRHs in the C-RAN are grouped in different clusters according to their capacity while the BBUs form a centralized pool of computational resource units. Each RRH services a finite number of mobile us...
Chapter
The analysis performed in this article is a concise proposal on how SDN solutions can be integrated into 5G mobile networks in order to address key cellular network challenges related to session and mobility management. Initially, we present the key characteristics of SDN and how session and mobility management are performed in this type of network...
Article
Full-text available
The authors study the downlink of an orthogonal frequency division multiplexing (OFDM) based cell that services calls from different service‐classes with various resource requirements. They assume that calls arrive in the cell as batches according to a compound Poisson process. They consider that the batch size is generally distributed while each c...
Article
Full-text available
Climate change has introduced significant challenges that can affect multiple sectors, including the agricultural one. In particular, according to the Food and Agriculture Organization of the United Nations (FAO) and the International Telecommunication Union (ITU), the world population has to find new solutions to increase the food production by 70...
Chapter
In this paper we study the downlink of an Orthogonal Frequency Division Multiplexing (OFDM) based cell that accommodates calls from different service-classes with different resource requirements. We assume that calls arrive in the system according to a Poisson process while the call admission is based on the Bandwidth Reservation (BR) policy. The B...
Chapter
We consider a two-link system with restricted accessibility that accommodates Poisson arriving calls from different service-classes and propose a multirate teletraffic loss model for its analysis. In a restricted accessibility system, a new call may be blocked even if available bandwidth units do exist at the time of its arrival. In the two-link sy...
Article
Full-text available
We consider the downlink of an orthogonal frequency division multiplexing (OFDM)-based cell that services calls from many service-classes. The call arrival process is random (Poisson) or quasi-random, i.e., calls are generated by an infinite or a finite number of sources, respectively. In order to determine congestion probabilities and resource uti...
Conference Paper
Dense small cell deployment is an effective way to address the increasing requirements of the emerging Fifth Generation mobile networks. The Cloud Radio Access Network (C-RAN) is an emerging concept that can achieve very dense small cell deployment. In ultra-dense C-RAN architectures with numerous Remote Radio Heads (RRHs), the minimization of the...
Article
Full-text available
In this paper, first we review two multirate loss models, whereby we can assess the call-level QoS of the Long Term Evolution X2 link supporting calls of different service-classes with fixed bandwidth requirements. The X2 interface directly connects two neighboring evolved NodeBs and is mainly responsible for the transfer of user-plane and control-...
Article
5G cellular mobile networks aspire to accommodate large numbers of users and devices most of which are expected to be mobile. They will also provide much higher data rates than previous generations’ networks. Analyzing how a cell’s performance is impacted by user mobility becomes paramount in an effort to provide the best possible quality of servic...
Book
Efficient Multirate Teletraffic Loss Models Beyond Erlang is a book filled with numerous efficient teletraffic loss models, presented in three sections—Teletraffic Models of Random Input, Teletraffic Models of Quasi-Random Input, and Teletraffic Models of Batched Poisson Input. This book provides a detailed explanation on how efficient multirate te...
Conference Paper
Full-text available
Internet of Things (IoT) aim to leverage data from multiple sensors, actuators and devices for improving peoples' daily life and safety. Multiple data sources must be integrated, analyzed from the corresponding application and notify interested stakeholders. To support the data exchange between data sources and stakeholders, the publish/subscribe (...
Article
This chapter considers multirate loss models of quasi‐random arriving calls with elastic bandwidth requirements and fixed bandwidth allocation during service. Calls may retry several times upon arrival in order to be accepted for service. Alternatively, new calls may request less bandwidth according to the occupied link bandwidth indicated by thres...
Article
This chapter considers ON‐OFF multirate loss models of random arriving calls with fixed bandwidth requirements. In the ON‐OFF loss models, in‐service calls do not constantly keep their assigned bandwidth but alternate between transmission periods (ON) and idle periods (OFF). The basic characteristics of these ON‐OFF loss models are: they can be use...
Article
This chapter considers multirate loss models of batched Poisson arriving calls with fixed bandwidth requirements and elastic bandwidth allocation during service. In the batched Poisson process, simultaneous call‐arrivals (batches) occur at time‐points following a negative exponential distribution. Elastic calls can reduce their bandwidth and simult...
Article
This chapter considers multirate loss models of quasi‐random arriving calls with fixed bandwidth requirements and elastic bandwidth allocation during service. In the elastic engset multirate loss model, the chapter considers a single link of capacity C b.u. that accommodates elastic calls of K service classes. Calls of each service class k come fro...
Article
This chapter begins with the simple case of a loss system that accommodates calls of a single service‐class, and presents the study of multirate teletraffic loss models. In the Engset multirate loss model (EnMLM), a single link of capacity C b.u. accommodates calls of K service‐classes under the CS policy. The chapter considers the multiservice sys...
Article
This chapter starts with random arriving calls of fixed bandwidth requirements and fixed bandwidth allocation during service. Before the study of multirate teletraffic loss models where multiple service‐classes of different bandwidth per call requirements are accommodated in a service system, the chapter presents the simpler case where all calls be...
Article
This chapter considers multirate loss models of random arriving calls not only with elastic bandwidth requirements upon arrival but also elastic bandwidth allocation during service. Calls may retry several times upon arrival, requiring less bandwidth each time, in order to be accepted for service. If call admission is not possible with the last (le...
Article
This chapter considers multirate loss models of batched Poisson arriving calls with fixed bandwidth requirements and fixed bandwidth allocation during service. In the batched Poisson process, simultaneous call‐arrivals (batches) occur at time‐points which follow a negative exponential distribution. A batched Poisson process can model overflow traff...
Article
This chapter considers multirate loss models of random arriving calls with fixed bandwidth requirements and elastic bandwidth allocation during service. It considers two types of calls, elastic and adaptive. Elastic calls that can reduce their bandwidth, while simultaneously increasing their service time, compose the so‐called elastic traffic (e.g....
Article
This chapter considers ON‐OFF multirate loss models of quasi‐random arriving calls with fixed bandwidth requirements. In‐service calls do not constantly keep their assigned bandwidth but alternate between transmission periods (ON) and idle periods (OFF). ON‐OFF loss models can be used for the analysis of the call‐level behavior of bursty traffic. T...
Article
This chapter considers multirate loss models of random arriving calls with elastic bandwidth requirements and fixed bandwidth allocation during service. Calls may retry several times upon arrival (requiring less bandwidth each time) in order to be accepted for service. Alternatively, calls may request less bandwidth upon arrival, according to the o...
Article
Full-text available
The Internet of Things (IoT) is the next technological leap that will introduce significant improvements to various aspects of the human environment, such as among others health, commerce, and transport. However, despite the fact that it may bring beneficial economic and social changes, the implementation of such a system poses many challenges and...
Conference Paper
Full-text available
Real-time event detection and targeted decision making for emerging mission-critical applications, e.g. smart fire fighting, requires systems that extract and process relevant data from connected IoT devices in the environment. In this paper, we propose FireDeX, a cross-layer middleware that facilitates timely and effective exchange of data for coo...
Conference Paper
Full-text available
We propose a multirate loss model for a 5G cellular network with cells in the form of circular disks in which users move according to the random waypoint model while the traffic is quasi-random i.e., the traffic is generated by a finite number of sources. The proposed model extends the Engset multirate loss model and leads to a recursive yet effici...
Conference Paper
Full-text available
The emergence of the Internet of Things (IoT) is expected to significantly advance the technology development in many application domains such as agriculture, home automation, and healthcare. However, in the IoT era, this development faces serious research challenges in terms of handling large amounts of data, designing efficient system architectur...
Article
Full-text available
In the emerging area of the Internet of Things (IoT), the exponential growth of the number of smart devices leads to a growing need for efficient data storage mechanisms. Cloud Computing was an efficient solution so far to store and manipulate such huge amount of data. However, in the next years it is expected that Cloud Computing will be unable to...
Conference Paper
Full-text available
New generation passive optical networks (NGPONs) are emerged as promising technologies for delivering bandwidth-demanding services in modern access networks. The 10-gigabit-capable passive optical network (XG-PON) standard has been proposed as a high-throughput architecture that realizes the Fiber-To-The-x (FTTx) paradigm, where x stands for curb (...
Conference Paper
Full-text available
Internet of Things (IoT) is envisioned as a trans-formative approach with a wide range of applications in various sectors such as home automation, industrial control, and agriculture. It promises innovative business models and improved user experience. However, as evidenced by recent attacks such as the Mirai botnet, IoT networks and systems remain...
Conference Paper
Full-text available
Nowadays ransomware presents a huge and the fastest growing problem for all types of users from small households to large corporations and government bodies. Modern day ransomware families implement sophisticated encryption and propagation schemes, thus limiting chances to recover the data almost to zero. In order to design and develop appropriate...
Article
Full-text available
Novel networking paradigms, such as software-defined networking (SDN) and network function virtualisation (NFV), introduce new opportunities in the design of next-generation mobile networks. The present work investigates the benefits of the emerging SDN and NFV technologies on the radio resource management (RRM) in mobile cellular networks. In part...