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Perceived as a key enabling technology for the future Internet, Network Virtualization (NV) allows an Infrastructure Provider (InP) to better utilize their Substrate Network (SN) by provisioning multiple Virtual Networks (VNs) from different Service Providers (SPs). A key challenge in NV is to efficiently map the VN requests from SPs on an SN, known as the Virtual Network Embedding (VNE) problem....
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...
Non-Orthogonal Multiple Access (NOMA) is known as one of the promising techniques in the fifth generation of wireless communication. The classification of users in (NOMA) is based on power, while it is based on time, frequency and code in Orthogonal Multiple Access (OMA). In this study the downlink NOMA includes two users, one strong and one weak. The comparison of NOMA and OMA properties shows a...
In this paper, we study a spectrum allocation mechanism of Cognitive Radio Networks based on multi-backpack problem, and then propose a discrete hybrid leapfrog algorithm and a spectrum allocation method based on this algorithm. This algorithm uses the integer coding method and designs the corresponding algorithm search strategy, using the crossover and mutation operator to improve the algorithm performance...
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...
This paper focuses on the optimization of routing and interference-aware resource allocation for a wireless backhaul network, focusing on the end-to-end delay minimization. We adopt a convex optimization formulation, which allows the decomposition of the problem, separating the network-plane and the communications-plane, and also allows an easy interpretation of results. We integrate the solution...
One of the goals of 5G wireless systems stated by the NGMN alliance is to provide moderate rates (50+ Mbps) everywhere and with very high reliability. We term this service Ultra-Reliable Ubiquitous-Rate Communication (UR2C). This paper investigates the role of frequency reuse in supporting UR2C in the downlink. To this end, two frequency reuse schemes are considered: user-specific frequency reuse...
In this paper, we consider a cognitive indoor visible light communications (VLC) system, comprised of multiple access points serving primary and secondary users through the orthogonal frequency division multiple access method. A cognitive lighting cell is divided into two non-overlapping regions that distinguish the primary and secondary users based on the region they are located in. Under the assumption...
Virtualization is necessary first step in realizing cloud computing. Most studies so far have only focused on CPU, memory and disk resources managements in the cloud environment. Hence, there is still no efficient tuning mechanism for bandwidth resource allocation. Cloud platform often encounters poorer performance in network processing that leads to lower quality of services because bandwidth resources...
Modern memory systems are equipped with multiple channels to achieve a higher memory bandwidth. Since the multi-channel memory system focuses on achieving a high memory bandwidth, data are allocated to all the channels. Hence, when the memory system is accessed, all the channels are activated until the next DRAM refresh starts. Therefore, when executing compute-intensive applications that do not need...
YARN (Yet Another Resource Negotiator) is an emerging resource management system in Hadoop platform which can process big data in the scale of petabytes/day. YARN, as a resource management system, needs manage all kinds of resources in the clusters, such as cpu, memory, disk io, network io and so on. At present, YARN mainly focuses on computing resource and storage resource (CPU and memory), while...
In this paper, we address cloud VoIP service orchestration and scheduling to provide appropriate levels of quality of service to users, and performance to VoIP service providers. We consider voice quality affected by call processing, and cost contributed by billing hours for used VMs in a cloud. We believe that this biobjective focus is reasonable and representative for real installations and applications...
This paper proposes a joint scheme of sensor subset selection, optimal power and bandwidth allocation for range-only target tracking in multiple-input multiple-output radar sensor networks. First, The Bayesian Cramer-Rao Bound (BCRB) is first derived. Then, the resource allocation problem is aimed to minimize BCRB with the resource constraints. The relationship between the optimal solutions of the...
With the increasing demand for communication quality, improving the service quality has become the focus and difficulty of the research. The traditional method has its limitations. The cross layer design method can break the barriers between layers, and ensure the quality of service transmission. This article proposes a cross-layer scheme called Ad hoc On-demand Distance Vector Routing Cross-layer...
Internet of Things (IoT) is combination of things and Internet. Things in IoT communicate via Internet. IoT has several heterogeneous devices and results to many issues. In this work we have proposed agent based job classification and resource allocation in IoT. In the proposed methodology agent uses the Fuzzy Interference System. Agents are defined in two hierarchicy namely at Local Processor Agency...
Cognitive Radio Network (CRN) is one of the emerging technologies to improve the spectrum utilization where Secondary Users (SUs) opportunistically uses the spectrum without creating significant interference to Primary Users (PUs). However, in CRN channel characteristics varies widely due to the random arrival of PUs which leads to call dropping/call blocking. Excessive call dropping reduces the quality...
The Citizens Broadband Radio Service (CBRS) band has three tiers of users. The General Authorized Access (GAA) has the lowest priority and operates without a license. A Spectrum Access System (SAS) is responsible for managing spectrum among the users. The Federal Communications Commission (FCC) rules specify that GAA users be allocated resources in a fair manner, but the method to do so is left open...
Multiple point-to-point (p2p) communication links that share noncontiguously available spectrum via noncontiguous orthogonal frequency division multiple access (NC-OFDMA) are considered in this paper. NC-OFDMA divides the spectrum into orthogonal subcarriers and assigns nonoverlapping subsets of these subcarriers to each of the links. Such a setup is motivated by the need for dynamic and opportunistic...
Small-cell deployment in licensed and unlicensed spectrum is considered to be one of the key approaches to cope with the ongoing wireless data demand explosion. Compared to traditional cellular base stations with large transmission power, small-cells typically have relatively low transmission power, which makes them attractive for some spectrum bands that have strict power regulations, for example,...
Virtual Sensor Networks (VSNs) envision the creation of general purpose wireless sensor networks which can be easily adapted and configured to support multifold applications with heterogeneous requirements, in contrast with the classical approach of wireless sensor networks vertically optimized on one specific task/service. The very heart of VSNs' vision is the capability to dynamically allocate shared...
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