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Massive multi-user multiple-input-multiple-output (MU-MIMO) is an emerging fifth-generation (5G) wireless communication technology. However, the deployment of large numbers of antennas and radio frequency (RF) chains needed at the base stations (BS) in massive MIMO brings challenges of high system complexity and hardware energy consumption. By using Kronecker channel modeling, a simple stochastic...
The Border Gateway Protocol (BGP) is an Internet routing protocol responsible for exchanging network reachability information between Autonomous Systems (ASes). Monitoring and mining BGP traffic are important aspects to understand and improve the stability of the Internet. However, identifying the characteristics of BGP traffic is much harder than it seems at a first glance where BGP traffic has been...
We propose a business model to compute the monthly subscription fee for users served by an innovative 5G network architecture that is designed to serve rural zones. We consider two possible options to deploy the 5G cells. In the first case, the connectivity is provided by means of small cells mounted on top of Unmanned Aerial Vehicles (UAVs). In the second case, large cells, covering wider portions...
Traffic Engineering (TE) accommodates traffic efficiently by dynamically configuring the routes so as to follow traffic changes. If traffic changes frequently and drastically, the interval to perform the route reconfiguration should be set to a short value, to follow traffic changes. To shorten the interval, obtaining the traffic information becomes a problem; measuring traffic information accurately...
In this paper, we first propose a Quality of Experience (QoE) evaluation model for dynamic adaptive streaming over HTTP (DASH) services. The proposed model predicts the perceived quality of user based on segment media quality, playback continuity and perceptual quality fluctuations caused by bitrate switching. Large quantities of subjective mean-opinion-score (MOS) tests demonstrate that our QoE evaluation...
One of the main issues for a smart city is the data aggregation from various data sources to the central control units for storage and analysis. While the core networks are winding up progressively over-burden, the cost of keeping up and extending the networks to oblige the big data of these smart cities stays high. Moreover, the utilization of these systems continues expanding the energy consumptions...
Multiclass systems with different Quality of Service (QoS) requirements are essential in nowadays Ethernet passive optical networks (EPON). In this paper, we propose a code division multiple access (CDMA) enabled dynamic power and bandwidth allocation (DPBA) algorithm for multiclass system. The novelty of the proposed algorithm is the resource allocation components: power control (PC) and bandwidth...
Modern cities are blanketed with Wi-Fi Hotspots. Such network access points can be utilised by Internet of Thing devices to enable wireless sensor network data mining deployments to report to the cloud. Vehicles are such devices that can provide valuable data sensing platforms for both internal operational properties such as speed, fuel and engine heat as well as external environmental features including...
Coverage holes (CHs) due to the correlated node failures, if not appropriately addressed in a timely manner, not only disrupt network's operation but also can compromise its integrity. In the absence of centralised control, distributed node relocation can be an effective solution to recover CHs. Relocation algorithms that mainly applied to all nodes to address networks' coverage and unbalanced deployments...
This paper presents an adaptive robotic swarm of Unmanned Aerial Vehicles (UAVs) enabling communications between separated non-swarm devices. The swarm nodes utilise machine learning and hyper-heuristic policy evolution to provide agility within the swarm, enabling each swarm member to select the most appropriate mobility policy for the environment given the swarm's abilities. The swarm evolution...
The second wave of cloud computing, named network cloudification, in the forms of SDN (Software Defined Networking), NFV (Network Function Virtualization), and 5G-MEC (Mobile Edge Computing), is to centralize and virtualize networking into data centers. It enables operators to offer NaaS (Networking as a Service) with much lower CAPEX and OPEX with larger flexibility because devices become simpler,...
There is little work which empirically analyses network management practice with respect to policy creation and maintenance. To address this gap we carried out five semistructured interviews of network administrators at a diverse range of enterprises. Analysis of the results led us to make the following contributions: We introduce a number of high-level orthogonal concepts (dimensions) for representing...
In a generic setting subsuming communication networks, resource sharing systems, and multi-agent communities, a client generates objects of various classes carrying class-dependent signatures, to which a server assigns class-dependent service quality. A Fake VIP attack consists in false declaration of a high class, with an awareness that detection of object signature at the server side is costly and...
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