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With the evolution towards the Fifth Generation of Mobile Communications (5G), Software-based Networks are paving the way to a radical transformation of Network Operators infrastructures. Novel technologies like Network Function Virtualisation (NFV) and Software Defined Network (SDN) are enabling new way of managing on-demand network resources. Focusing on the Mobile Core Network architecture, Service...
Companies commonly establish and pursue business goals for different purposes. Many purposes, such as to understand, improve, compare, monitor and control, among others, may be driven by measurement, evaluation and analysis activities. Different strategies can be used to help achieving goal purposes. A strategy defines a set of activities and methods related to nonfunctional requirements, measurement,...
This paper identifies that the anycast communication pattern is needed in the Machine Type Communications (MTC), where there could be multiple MTC devices being deployed in the same area for the same type of data, the client only cares about the data being retrieved but not where the data comes from. Currently the MTC server can provide such anycast service, but with large signaling overhead and bandwidth...
An algorithm for controlling and quasi-optimal channel selection is proposed for the operative exchange of crisis environmental monitoring data. The radio network of data transmission is shown using a mobile command post that is equipped with the equipment providing: HF and VHF communication using repeater, radio relay, cellular, satellite communication, as well as WI-FI radio access.
Contrast to the two-dimensional directional sensor networks, the three-dimensional directional sensor networks increases complexity and diversity. External environment and sensor limitations impact the target monitoring and coverage. Adjustment strategies provide better auxiliary guide in the process of self-deployment, while strengthen the monitoring area coverage rate and monitoring capability of...
The orchestration of network services is a well investigated problem. Standards and recommendation have been produced by ETSI and IETF while a significant body of scientific literature can be found exploring both the theoretical and practical aspects of the problem. Likewise several open-source as well as proprietary tools for network service orchestration are already available. Nevertheless, in most...
The paper reported a field survey that sought to examine the technical implications in the adoption of a Global System for Mobile communication GSM-based metering system in the New Juaben Municipality. Both simple random sampling and interview guide methods were used. The issues considered under the study were; understanding of a GSM-based metre reading, mobile phone penetration among consumers, reliability...
In this paper we consider a portable cardioanalyzer for assessment of heart conditions without limiting patient movement including ECG recorder with external electrodes, wireless transmitter for work in networks of the third and fourth generation and a computing module. As the computing module we use a MCU with developed software. The characteristics of the closest analogs are considered. Distinctive...
The paradigm of health care delivery is slowly aligning with the needs and habits of modern patients. Mobile computing may be a solution to respond to the growing trend and need for health care sharing and collaboration, enabling the redesign of processes giving rise to new models of health care delivery. Seeking to determine the situation in Portugal regarding mobile computing initiatives in this...
Software Defined Network (SDN) is an advanced approach to designing dynamic, manageable, cost-effective, and adaptable network architectures. SDN will play a key role as an enabler for 5G and future networks. Transferring network monitoring functions to a software entity working in conjunction with configurable hardware accelerators through a scheme called Software Defined Monitoring (SDM) is one...
Barrier coverage is a natural application of sensor networks in which sensors are deployed to detect intruders or protect crucial resources. In this paper, we consider a hybrid sensor network with a two-phase deployment, in which less-expensive static sensors are first randomly deployed in an area, and then more-expensive mobile sensors are deployed to fill coverage gaps. We use a probabilistic model...
Mobile crowd sensing (MCS) arises as an appealing paradigm, which utilizes participants to contribute sensing data generated from sensors embedded in smart devices in the internet of things (IoT) for the people-centric service delivery and crowd intelligence extraction. Due to the inherent selfishness of human and network's openness, the quality of the data submitted by the participants is not always...
The quality of service for an end user is defined by the quality of the network links connecting user and service provider. There are several parameters impacting network communication links, a very important one being the available end-to-end bandwidth. Bandwidth measurements in cellular wireless networks with traffic reactive nature, nomadic end users and highly dynamic shared resources is a challenging...
Voice services has been for a very long time the primary source of income for mobile network operators. Even with the increasing importance of the data traffic, voice services will keep playing a key role and will not disappear with the transition to a networking model based on the IP protocol. Moreover, the key industry players diagnosed years ago that mobile subscribers wouldn't accept a significant...
The COMPA (Control, Orchestration, Management, Policy, and Analytics) adaptive control loop realizes an automation pattern that can operate recursively at many layers in a carrier network. An overall COMPA autonomic control loop can orchestrate functions, themselves implemented as COMPA autonomic loops. Thus the COMPA automation patter can recurse right down to resource level in a network. One of...
Modern cellular networks are complex systems offering a wide range of services and present challenges in detecting anomalous events when they do occur. The networks are engineered for high reliability and, hence, the data from these networks is predominantly normal with a small proportion being anomalous. From an operations perspective, it is important to detect these anomalies in a timely manner,...
Building on the adoption of the Network Functions Virtualization (NFV) and Software Defined Networking (SDN) paradigms, 5G networks promise distinctive features including the capability to support multi-tenancy. Virtual Network Operators (VNOs) are expected to co-exist over the shared infrastructure, realizing their network functionality on top of virtualized resources. In this context, we observe...
YoMoApp (YouTube Monitoring App) is an Android app to monitor mobile YouTube video streaming on both application- and network-layer. Additionally, it allows to collect subjective Quality of Experience (QoE) feedback of end users. During the development of the app, the stable versions of YoMoApp were already available in the Google Play Store, and the app was downloaded, installed, and used on many...
Energy efficiency is a powerful measure for promoting sustainability in technological evolution and ensuring feasible battery life of mobile end-user devices. Peer-to-peer technology provides decentralized and self-organizing, but also energy-inefficient technology for distributing content between devices in networks that scale up almost infinitely. The dissertation [1] summarized in this paper makes...
Mobile ad hoc networks (MANETs) is the collection of wireless nodes. The wireless nodes communicate with each other without any fixed infrastructure. One of the major challenges in ad hoc network is to make the network fault tolerant and provide the trustworthiness to the mobile nodes. Nowadays, the MANETs is widely used in the different field's applications, but the failure of these nodes is the...
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