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Due to the limited resources of mobile terminals, the service providers are adopting more cloud infrastructure to provide a powerful service for limited devices. This use needs the implementation of strong security mechanisms to guarantee the protection of information and data traffic. Since mobile devices have limited resources, it is still a major challenge to optimize and provide security simultaneously...
Cloud computing is an innovative model that is gaining attention and wide popularity among IT professionals and users. It provides a new mode of use of IT resources by offering everything as a service (storage, servers, network, etc.) and provisioning resources on-demand. In cloud computing environments, users outsource their data to distributed data centers in the cloud and entrust cloud providers...
Video streaming services over the Internet are being widely used in mobile networks. Currently, service providers are relying more and more on securing data transferred between the service provider, namely the video streaming server, and the end user. However, securing video content includes at least the use of video encryption algorithm requiring processing and memory capabilities, provoking more...
Message dissemination is considered as a challenging task in Vehicular Ad-hoc network (VANET). In particular, safety messages, such as, road accident warning, traffic congestion warning, etc., are the most critical messages type that need to be efficiently transmitted in a wireless and mobile network where the topology changes dynamically. Many protocols have been proposed for the sake of disseminating...
Machine-to-Machine (M2M) communications are expected to be one of the major drivers for the future 5G network. The significant increase in the number of these devices could, however, lead to a huge amount of traffic at the access network, which may cause heavy congestion and service degradation, especially for the most critical applications. Indeed, when the M2M traffic's arrivals become correlated...
Due to the accelerating uptake of multimedia services over Internet, Quality of Experience (QoE) assessment has become a topic of prime importance. While current QoE prediction models focus on technology-centered Quality of Service (QoS) parameters as the main influencing keys on user's perception quality, they do not sufficiently address the following question: “Based upon QoS, is it competent to...
The diversity of applications' types in Vehicular Ad hoc NETworks (VANETs) has spawned a large variety of messages that need to be efficiently disseminated between connected vehicles. The most critical messages are those dedicated for safety applications such as road hazardous warning, signal violation warning, etc. The dissemination of this sort of messages is considered as a challenging task in...
Next Generation Networks (NGN) principle or 5G technology, is based on the integration of heterogeneous wireless systems and cognitive networks. NGN is expected to have Quality of Service (QoS) as the major challenging issue. More specifically, NGN aims at providing guaranteed QoS levels and Quality of Experience (QoE), especially for multimedia services. However, with the increase in number of connections,...
Video streaming services over the Internet is being widely used in mobile networks. From providers' point of view, the success of such service is highly correlated with the end-user degree of satisfaction which is measured in terms of Quality of Experience QoE. In fact, most of video streaming providers are adopting adaptive streaming solution that offers a better experience to the end user since...
Machine-to-Machine (M2M) communications are expected to be one of the major drivers of future cellular networks, due to a plethora of services provided to operators and consumers. This leads to an explosively growth of simultaneous M2M arrivals, and then a bursty random access attempts that causes a severe random access congestion in addition to terminals' synchronization issues. In this paper, we...
Traffic offloading is an attractive solution for the operators to increase the system radio capacity in the future cellular networks. Device to Device (D2D) technology helps achieve this goal by allowing direct communication between closely located user devices. However, as D2D devices transmit on the cellular network uplink bandwidth, the communication mode selection should be properly studied in...
The Internet of Things (IoT) and particularly Machine-to-Machine (M2M) communications are considered as major enablers for future smart cities' initiatives. While offering a wide range of applications and services, supporting such devices constitutes, however, one of the most important challenges to be faced by Network Operators (NO). Indeed, the expected huge number of devices requesting to connect...
Different wireless technologies are assumed tocooperate in a single heterogeneous environment in futurenetwork deployment schemes. Such environment is characterizedby a multitude of new services based on multimedia services likegaming and real time video streaming. When dealing with video services, traditional QoS solutionsare not sufficient for ensuring video awareness and good user'sperception....
The integration of heterogeneous wireless networks allows the mobile users to benefit simultaneously from the radio coverage of different access technologies (RAT: Radio Access Technology) and the diversity of applications. Nowadays, applications are becoming more and more critical in terms of Quality of Service (QoS) and dynamicity. Handover mechanism is responsible of guaranteeing the required quality...
A cloud computing as a distributed computing emerging paradigm in which data and services are available in data centers extensible and can be accessed transparently since devices (computers, phones, clusters, ) connected via the Internet. Cloud computing solve problems of scalability and availability and insure distributed computing. This paper aims to provide an architecture for services deployed...
Video streaming services are the main source of generated traffic over the internet and hundreds of million minutes are watched every day. This proves that the video streaming service is booming, and ensuring customers' satisfaction in this regard will be a major competitive advantage among Internet service providers. The common measures that are being used are mainly about quantifying the Quality...
In a previous proposal, we propose a scheduler that enhances the usage of the radio blocks (RBs). This paper consists of an extension of our previous scheme in order to find a good trade-off between both the delay and the PLR. The proposition consists of a scheduler based on the packet prediction mechanism (PPM). This scheduler provides the exact time at which a flow has to be served. Further, several...
Machine Type Communications (MTC) come up with substantial revenue growth for Mobile Network Operators (MNO), but they represent at the same time the most important challenge they are facing. In fact, a massive number of MTC devices performs simultaneously the Random Access (RA), which causes severe congestion and reduces the RA success probability. To control the Radio Access Network (RAN) overload...
A Long Term Evolution Advanced (LTE-A) downlink scheduler must guarantee the Quality of Service (QoS) provisioning. Existing schedulers consider the Channel Quality Indicator (CQI) reports to determine their priority rules. Nevertheless, these reports may not be sufficiently accurate. In addition, existing scheduling policies fail to provide a good tradeoff among low Packet Loss Ratio (PLR) and bounded...
Next generation mobile networks are envisioned to be heterogeneous with an increase in demand towards ubiquitous video applications. As various networks have widely different characteristics, it is difficult to maintain the quality of service (QoS) after executing a handover from one network to another. Moreover, maintaining a good user perception level “quality of experience” (QoE), based on video...
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