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Network virtualization is a dynamic context leading to imbalance for substrate network (SN) resources which can affect the virtual network (VN) request further. In this paper, we propose the GRC-mopso-VNE algorithm to solve the VNE problem taking link resources into consideration in the stage of node mapping. A novel metric is developed, i.e., global resource capacity (GRC), to evaluate the mapping...
The explosive demand for data in wireless devices has driven mobile carriers and the research community to seek nearly all intriguing technical and economic solutions to data demand problem. Content pre-staging is the idea to push content as close to the device as possible, either at the network edge or on the device itself in order to reduce bandwidth needs at peak demand times. We posit an interesting...
Internet service providers are facing increasing back pressure from rising access demand by users, especially peer‐to‐peer (P2P)‐based applications that greatly enhance the large‐scale distribution of content into and out of their networks. With the ever increasing consumption pressure on scarce bandwidth resources, ISPs have been forced to reconsider their business model of overselling ‘all‐you‐can‐eat’...
We report the theoretical and experimental study of graphene induced silicon waveguide dispersion changes. The bandwidth of focusing apodized grating may be increased due to the decrease of waveguide dispersion.
Internet Service Providers (ISPs) face increasing bandwidth pressure from rising access demand by users, especially P2P and VoD applications. Traditionally, P2P has been viewed as tremendously negative from the perspective of the ISP. In this paper, we question this assumption and study the impact of P2P applications on the effective ISP functionality. We perform an economic analysis to show that...
The paper provides an efficient extrapolation algorithm to enhance resolution as well as reduce sidelobes, which is based on ASR. The processing of algorithm is simple to operate. Simulation experiments show the validity of the algorithm. Comparing to the Fourier method, the proposed algorithm obtains better results.
One of the driving forces of the development of SAR image formation has been to obtain better and better image resolution. Conventional radar imaging methods based on Fourier transform provide good resolution as long as the backscattered data is available over a large bandwidth and a sufficient aspect region. The paper proposes a 2D Unitary ESPRIT superresolution SAR imaging method exploiting that...
A heuristic algorithm based on token-ring is proposed for Group Multicast Routing and Wavelength Assignment (GM-RWA) in OVPN and the simulation result shows its performance in the number of wavelength channels used.
It is widely recognized that the wireless spectrum is a scarce and limited resource and that the present practice of static spectrum allocation and exclusive licensing is inefficient. The proposed approaches generally either focus on maximization of spectrum utilization or profit maximization of individuals (such as the government or users). In this paper, we consider an efficient, or socially optimal,...
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