The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Network Function Virtualization (NFV) is a promising solution for telecom operators and service providers to improve business agility, by enabling a fast deployment of new services, and by making it possible for them to cope with the increasing traffic volume and service demand. NFV enables virtualization of network functions that can be deployed as virtual machines on general purpose server hardware...
We describe a “crowd measurement” project, referred to as PoQeMoN, whose main objective is to identify Quality of Service (QoS) indicators in order to predict the Quality of Experience (QoE) for HTTP YouTube content on mobile networks. Results are based on experiments on an operational network. The second contribution of this paper is to show that the proposed indicator is easy to implement in order...
Delay Tolerant Networks (DTNs) differ from the traditional Mobile Ad Hoc networks (MANETs) in that DTNs are not always interconnected. The issue of routing data in a DTN is considered here. Many routing protocols exist for DTNs. Some are based on comparing nodes to each other, whereas others focus on the internal properties of the messages they hold. There are wide ranges of protocols, and they perform...
Pervasive networks formed spontaneously by wireless mobile devices capable of ad hoc communication make it possible to get services from these devices, and to compose them dynamically so as to provide people with new and more sophisticated application services. Discovering, invoking and composing services in such networks are challenging tasks, due to the numerous and unpredictable connectivity disruptions...
Available smartphone« and smart objects can use short range connections like Wi-Fi and Bluetooth as a communication technique to exchange information with nearby devices. Those techniques are used in cases of absent end-to-end connection such as in Delay Tolerant or Opportunistic Networks. The study of message transmission processes and contact information in such networks has gained more attention...
This paper considers the problem of joining a network of constrained IoT devices. We propose to take advantage of Singer Cyclic Difference Sets (S-CDS) for a joining scheme that results in low duty cycles and apply the proposed scheme to the joining problem in 802.15.4e TSCH networks. S-CDS distributes the active periods of nodes over time so that a joining node does not suffer from long scanning...
In opportunistic networks, forwarding based protocols lead to a large amount of data flow to the highly connected nodes and unfairness of the nodes' traffic load, finally, it makes the highly connected nodes suffer congestion and results in the messages were discarded. To solve this problem, a congestion control algorithm based on Social Awareness is proposed in this paper. When choosing the next...
Explosion of mobile traffic will bring a heavy burden to the core network, and rapid growth of mobile devices, as well as increasing demand for delay-sensitive services poses severe challenges to future wireless communication systems. In this regard, local breakout is a promising solution to save core network load and, more importantly, to reduce end-to-end (e2e) delay of packets with local significance...
Self-organizing Mobile Ad-hoc Networks (MANETs) based on Delay Tolerant Networking (DTN), are powerful tools for maintaining or reestablishing telecommunications following disasters and other infrastructure disrupting events. However, such networks typically have very limited bandwidth compared with infrastructure-based networks, with the practical effect that they cannot satisfy every demand placed...
Cognitive Radio Network (CRN) is a new technique that utilizes available unlicensed spectrum bands due to limited numbers of fixed licensed spectrum bands. It consists of four main functions, namely, spectrum sensing, spectrum decision, spectrum sharing and spectrum mobility. We focus on the spectrum mobility (also known as spectrum handoff) which manages the movements of secondary users to occupy...
Sink mobility has been proven to be an effective way for minimizing delay in data delivery and mitigating the hot spot problem in wireless sensor networks (WSNs). However, there is an impact of the path selection for the mobile sink on the data delivery delay. Hence selection of optimal number of halting positions called rendezvous points (RPs) and their locations are challenging in WSNs. In this...
The convergence of mobile communication networks based on technologies mainly like UMTS, LTE, WLAN and WiMAX referred to as Next Generation Networks (NGN) results in a heterogeneous environment. NGN enlarges the number of the network points of attachment (PoA) with overlapping coverage, which increases the actuality of the network selection problem. At the same time, the variety of mobile multimedia...
In the present era of modern communication network, the importance of mobile technology can't be denied at all. The requirement of high speed internet access through these mobile devices seamlessly has been increased. The growing use of IP devices in the field of mobile network has generated a great demand of network mobility. To fulfill these demands, network mobility architecture has been studied...
The design of routing protocol in mobile social delay tolerant networks is a tricky issue due to lack of stable end-to-end path, frequent link disconnection and changeable network topology. This paper proposes a novel routing algorithm based on dynamic topological potential and social relationship (DTPSR) between nodes for mobile social delay tolerant networks. In DTPSR, we define three metrics to...
In this paper the performance analysis of a routing algorithm for MANETs called Service Zone Gateway Prediction (SZGP) is presented. This is a non-cooperative and hybrid type of routing with a hierarchical multilayered structure, incorporating pre-computed multipath hop-by-hop distributed connectivity. The goal is balance of the load among the nodes and reliable and energy efficient communication...
The rapid development of intelligent terminals and mobile Internet industry has brought many challenges and opportunities to the mobile network. Mobile Network Open Services can provide users and developers with the open resources consisted of network infrastructure, network data and diversified services, so as to build an open, flexible, collaborative Internet ecosystem. The ability to open the mobile...
Aiming at satisfying in a cost-effective manner the forecast traffic growth that future mobile networks will need to support, traditional distributed Radio Access Networks (RANs) are evolving towards centralized architectures. Specifically, the Cloud-RAN (C-RAN) architecture has shown that can alleviate to some extent the ever increasing Total Cost of Ownership in mobile networks. The current trend...
Feedback delay can severely impact network performance in mobile network and the theoretical quantification of performance degradation has attracted much research interest recently. In this paper, we conduct coverage analysis of mobile ultra-dense networks (UDNs) where coordinated multipoint (CoMP) technology is adopted to enhance network performance and the available channel state information (CSI)...
Proactively pushing content to users has emerged as a promising way of coping with the explosively growing traffic demand of next-generation mobile networks. However, it is still unclear whether content pushing can improve the energy efficiency of hard delay-constrained communications over additive white Gaussian noise (AWGN) channels. With pushing, the energy consumption can be reduced by increasing...
The explosion of mobile data traffic has an adverse effect on communication delay and system performance in 5G networks. Mobile Edge Computing(MEC) is an emerging technology has become an essential solution, which provides services within the close proximity of users. In this paper, we present a edge caching structure for MEC and propose a CMAC(Cooperative Multicast-Aware Caching) strategy to reduce...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.