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This work is focused on the characterization of the traffic allocated in Elastic Optical backbone networks when different dynamic traffic profiles are generated. Extensive simulations are done to statistically model the real-time traffic carried by this kind of networks. Well known topologies such as NSFNet and US_Backbone are considered as well as different parameters applied to the traffic generation...
It is expected that future cellular networks will be densely deployed with both macro cells and small cells to meet the ever-increasing traffic demand, and a cost-effective and reliable backhaul connectivity will be essential to such deployment scenarios. As wired backhaul solutions may not be always practical or feasible, in this paper we consider wireless in-band backhaul for a network with macro...
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...
P2P is an essential technology to solve the gap between server's capability and growing demand of client. In P2P system, there is a natural imbalance. Thus, Load balance is one of the main research directions. Better balance performance would lead to higher bandwidth, higher resource utilization, and better network stability. Churn is a normal phenomenon in P2P network, which often brings some awful...
The efficient allocation of multi-interface multi-channel Wireless Mesh Network channel resources is a hot topic recently. Effective channel management mechanisms need to be designed to ensure the full and efficient use of channel resources. In this paper, combined with the channel load that network buyers perceived, the channel reassignment problem of multi-interface multi-channel Wireless Mesh Network...
The Elastic Optical Network (EON) architecture has been proposed in response to the large capacity and diverse traffic granularity needs of the future Internet. By breaking the fixed-grid spectrum allocation of WDM networks, EONs increase the flexibility in terms of connection provisioning. The appropriate-sized optical spectrum is allocated to each connection depending on its requested bandwidth...
The next generation of small cell base stations (SCBSs), with multi-mode specialty, can offload part of traffic load to unlicensed spectrum to alleviate burden in licensed band. In this paper, we propose an interference graph to capture the coupling interference relationship in unlicensed band between small cell. Based on the interference graph, we formulated the traffic-offloading issue as the local...
Elastic networks are agreed as the right solution to improve optical networks performance. This work discusses about flexible grid usage value, supported by extensive simulations. Elastic connections using fixed grid spectrum allocation can actually lead to better network performance.
The multi-tier architecture is prevalently adopted by cloud applications, such as the three-tier web application. It is highly desirable for both tenants and providers to provide virtual networks in an efficient and elastic way, where tenant applications can automatically scale in or out with varying workloads and providers can accommodate as many requests as possible in the underlying network. However,...
Network virtualization is seen as a key networking paradigm for building diverse network services and architectures over a shared network infrastructure. Assigning network resources to virtual links and, more generally to virtual network topologies, efficiently and on-demand is one of the most challenging components of any network virtualization solution. This paper addresses the problem of on-line...
Network virtualization enables diversified network architectures to coexist in a substrate network. Content-centric network (CCN), as one of the major proposals for the future network, can be deployed in the virtualized environment. However, the recent work that has attempted in this direction has not addressed issues concerning the unique resource usage of CCN in resource allocations during the embedding...
Heterogeneous network deployment is one of the key issues of future Long Term Evolution Advanced systems. However, the coexistence of high power macro-cells and low power femto-cells leads to co-channel interference problems that must be suitably counteracted. Enhanced Inter-Cell Interference Coordination allows a joint management of the resources among the cells so as to reduce the interference....
It becomes a challenge to design an efficient load balancing method via live virtual machine (VM) migration without degrading application performance. Two major performance impacts on hosted applications that run on a VM are the system load balancing degree and the total time till a balanced state is reached. Existing load balancing methods usually ignore the VM migration time overhead. In contrast...
Flex-grid elastic optical networks are an enabling technology for future heterogeneous on-demand optical bandwidth services. Heterogeneous means that optical connection requests for different services requiring different data rates would coexist in the network. In this context, Routing and Spectrum Assignment (RSA) algorithms face the challenge of making a fair allocation of resources, providing a...
In wireless cellular network, resource constraint has become a critical and important issue. Users always and everywhere expect telecommunication systems with the best quality. They also need visual and multimedia communication. So, an intelligent wireless network that has the ability to adapt to environment in different network traffics is needed. The intelligent network has the capability to decide...
The success of multi-tenant data-centers depends on the ability to provide performance guarantees in terms of the resources provisioned to the tenants. As bandwidth is shared in a best-effort way in today's data-centers, traffic generated between a set of VMs affect the traffic between another set of VMs sharing the same physical links. This paper proposes an integrated resource allocation scheme...
LTE-Advanced is the evolutionary path from LTE Release 8. It is designed to significantly enhance the performance of LTE Release 8 in terms of higher peak data rates, improved system capacity and coverage, and lower latency. These enhancements allow LTE-Advanced to meet or exceed the IMT-Advanced requirements and are being considered as part of LTE Release 10. In this paper, some of the physical layer...
To reduce datacenter energy consumption and cost, current practice has considered demand-proportional resource provisioning schemes, where servers are turned on/off according to the load of requests. Most existing work considers instantaneous (Internet) requests only, which are explicitly or implicitly assumed to be delay-sensitive. On the other hand, in datacenters, there exist a vast amount of delay-tolerant...
This paper addresses the bandwidth management problem in Differentiated-Service-aware Traffic Engineering (DS-TE) architectures. In this context, Bandwidth Constraint (BC) models have to be configured to control the maximum amount of resources per traffic class per link and drive routing decisions to the fulfilment of the QoS requirements. A self-management module is implemented in each node of the...
DiffServ-aware MPLS-TE (DS-TE) allows bandwidth reservation for Traffic Classes (TCs) in MPLS-based engineered networks and, as such, improves the basic MPLS-TE model. In DS-TE networks, per-Class quality of service guarantees are provided while being possible to achieve improved network utilization. DS-TE requires the use of a Bandwidth Allocation Model (BAM) that establishes the amount of bandwidth...
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