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In a digital world changing at high speed, data centers still play a major role in new network architectures. Software‐defined network (SDN) technology is considered as a suitable solution to solve and overcome several limitations of standard data centers including flexibility, scalability, and ease of management. However, in an SDN with a distributed control plane, the assignment of switches could...
Smart grid is designed to overcome the current power grid inefficiency, and to compensate the exhaustible fuelfossil based energy by the use of the renewable energy resources. While working in an ON/OFF-grid switching mode, the system work normally in an ‘’ mode that allows the exchange of the energy flow between the provider and the consumer. Thus, when a fault occurred in the grid, the home energy...
One of the challenges that smart Microgrid should face is to rely mostly on renewable energy sources and ensure the balance of the usage of heterogeneous energy sources. But, due to its uncertain and intermittent character, the renewable sources cannot be predictable, and the balancing task becomes less evident to apply. In this paper, we propose a new home energy management strategy to ensure a balanced...
The trend today is to access Internet through mobile devices, and people start using smartphones more than computers. This kind of services requires frequent updates through small messages from editors like in social networks. Although the use of such applications is subject to fees and consumes energy from limited batteries of smartphones. If a user activates his mobile device and has a useful contact...
Using Delay Tolerant Networks (DTNs) would facilitate the connection of devices and areas across the world that are under-served by current networks. The DTNs are based on the concept of store-carry-and-forward protocols. A node may store a message in its buffer and carry it for a short or a long period of time, until an appropriate forwarding opportunity arises. A critical challenge is to determine...
Delay tolerant networking (DTN) is able to provide communication services in areas where there is no guarantee that a fully connected path between source and destination exists at any time, and seek to address the technical routing issues in wireless networks. Traditional routing protocols are unable to deliver messages between hosts in such conditions. PRoPHET protocol is among the most widely used...
We study revenue-maximizing in a wireless system where interested users share a common spectrum and interfere with each other. Capacity is increased in proportion of the number of users. Our objective is to design a scheme that achieves an optimal solution for the provider with respect to users strategy, bandwidth management and some fairness criteria. We consider a flat rate pricing for users. Two...
The ubiquity of mobile devices is fostering a paradigm shift in the realm of Internet services. Consider, for instance, mobile users of social networks, that require frequent updates through small messages from their friends. If a user activates his mobile device and has a contact opportunity with an access point, an update can be received at the expense of monetary and energy costs. Thus, users face...
Cognitive radio is an emerging technology in wireless access, aimed at vastly improving the way radio spectrum is utilized. In this article, we investigate the performance improvement gained by applying cognitive radio to a multiple wireless service providers (WSPs). We consider several WSPs and two types of users: primary (licensed) and secondary (unlicensed) users. Two different schemes are proposed...
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