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Software Defined Networking and Network Function Virtualisation provide significantly more flexibility and control when provisioning QoS for delay sensitive services. Network delay can have a detrimental impact on VoIP quality and, therefore, minimising delay can help maintain the quality and prevent call dropping. This paper proposes a queuing scheme based on packet delay for prioritising VoIP calls...
With reference to rapid increment of hyper-urbanization and speedy declination of rural birthrate in the contemporary Taiwanese, a bulk of students in rural districts have gradually fallen off their educational resources that results in a majority of recruiting freshmen of top-ranking higher education institutes have come from urban regions. Under this most solemn the fewer newborns condition, “how...
This work proposes a framework for proactive resource allocation in IaaS clouds to improve the system performance. In this system framework, the over-commit approach is applied to improve resource utilization and to show the performance impact. Although the over-commit approach could obtain better resource utilization, there are still some risks. When the amount of aggregated resources requested by...
Multipath TCP(MPTCP) is an experimental protocol under standardization in the IETF. It enables hosts to send data over several interfaces or paths and has use cases on smartphones, datacenters or dual-stack hosts. It has proven to increase bandwidth in these cases while remaining compatible with the existing network infrastructure and applications. However, with the popularity of Online Data-Intensive...
Larger share of total energy consumed by mobile network operators (MNOs) is wasted to ensure seamless coverage. Three to six MNOs covering the same geographical area results in even more energy waste. Division of scarce resource, i.e., spectrum into small chunks also deteriorates the overall performance. With exponential growth of the traffic and insignificant marginal revenue, it is time for the...
Today's supercomputers are moving towards deployment of many-core processors like Intel Xeon Phi Knights Landing (KNL), to deliver high compute and memory capacity. Applications executing on such many-core platforms with improved vectorization require high memory bandwidth. To improve performance, architectures like Knights Landing include a high bandwidth and low capacity in-package high bandwidth...
Modern communication devices supports higher bandwidth applications. So the antenna required for such applications should have wider bandwidth and should be smaller in size. Being easy to fabricate, low volume and inexpensive microstrip patch antenna is widely used for wireless communication applications. But disadvantages like low gain, narrow bandwidth, etc. limits the performance of microstrip...
In recent years, as higher performance terminal equipments are spread, the amount of mobile data traffic is growing rapidly by using popularization of streaming services in wireless networks. To overcome this situation, it is considered that Access Points (APs) are deployed densely for capacity improvement. In such an environment, virtualization is a possible technique to use multiple APs efficiently...
Floating Content (FC) has recently been proposed as an attractive application for mobile networks, such as VANETs, to operate opportunistic and distributed content sharing over a given geographic area, namely Anchor Zone (AZ). FC performances are tightly dependent on the AZ size, which in literature is classically chosen by the node that generates the floating message. In the present work, we propose...
One of the most profitable and emerging high-tech markets is the one that involves games for PC and consoles; a market that is growing year by year and that is rapidly evolving. Several big game corporations are implementing now the remote video streaming through the domestic network between two devices; a feature that regards not only PCs but also consoles. This paper investigates one of the main...
This paper proposes a new congestion control method based on a hop-by-hop rate control in named data networking (NDN). The proposed method suppresses the excessive reduction of Interest sending rate due to continuous negative acknowledgement (NACK) packets caused by the propagation delay. The proposed method limits the rate reduction to once per congestion. The point of our method is not to change...
The exponentially increasing demand for higher data rates has pushed the mobile network operators and researchers to scout for ways to improve the system bandwidth, most notably by using the unlicensed band which already hosts long-standing technologies like Wi-Fi. Of late, some effort has gone into exploring the performance of Licensed-Assisted Access (LAA) which can boost the bandwidth of LTE by...
In these days, a large amount of popular peer-to-peer (also commonly known as P2P) applications, especially in the live streaming domain, are operating in Internet. One of the keys to success of such an application is the mutual cooperation among the participants (i.e., peers) in that application. However, presence of selfish peers (also commonly known as free riders) affects the performance of the...
Recent years have shown an increase demand for wireless communication which creates new challenges in the field where intelligent spectrum utilization is necessary to maintain high network performance. The emergence of Cognitive Radios which provide opportunistic access to the spectrum, introduce an improvement in the spectrum utilization and the communication quality. Through dynamic spectrum access...
Optimal energy and spectrum cooperative allocation is investigated for the downlink of two energy harvesting base stations in this paper. In particular, the joint maximization of the users' utilities and the base stations' revenues in two adjacent cells is considered. Each user can join either cell 1 or cell 2. When the users' choices on which cell to join are fixed, the energy and spectrum allocation...
Recently, the multi-tiered storage systems that are composed of hard disk drives (HDDs) and solid state disk drives (SSDs) have received significant attention. The multi-tiered storage system extends the storage hierarchy by using SSDs to cache data from the HDDs. Thus, how to cache the appropriate data on the SSDs becomes an important issue for the multi-tiered storage systems. Due to the tremendous...
Hardware resources require efficient scaling because the future of computing technology seems to be intensive multithreaded. One of the main challenges in the scalability of computers hardware is the hierarchy of the memory. Chip-multiprocessors (CMPs) rely on large and multi-level hierarchies of caches to reduce cost of resources and improve systems performance. These multi-level hierarchies are...
For achieving various network optimization and management goals in data centers, some VMs need to be migrated from the initial servers to the target ones. Live VM migration is an effective technique to achieve these goals. When multiple VMs need to be migrated at the same time, the migration order and migration bandwidth has a great impact on migration performance. For making an effective VM migration...
Network coding is becoming a very important technology to improve the reconstructing performance of distributed storage systems due to its high reliability and low redundancy. Update is a typical and important operation involved in the network-coding-based systems. However, the overhead incurred by the update operation has a significant impact on the system performance. Traditionally, the small updated...
Cloud computing technology is rapidly emerging as quite an efficient execution platform for even highly trusted scientific applications. Efficient resource management plays a pivotal role in the execution along with attaining high performance standards in Distributed environments. Resource provisioning and scheduling has become an important area of research in cloud resource management. Clouds can...
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