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Periodic reconfiguration of the virtual topology in transparent optical networks has been recently investigated as a mechanism to more efficiently adapt the network to predictable periodic traffic variations along the day or week. The scheduling of periodic reconfigurations should consider the trade-off between a lower network cost obtained through better resource allocation, and the undesired traffic...
Wireless personal area networks (WPAN) are wireless sensor networks (WSN) designed for allowing a low-cost, low-power and short-range wireless communication. The IEEE 802.15.4 is the WPAN standard which satisfies these features and facilitates diverse self-configuring operation processes for adapting to different environments and applications. One of these processes is responsible for resolving the...
The IEEE 802.15.4 standard offers a low-cost, low-power and short-range wireless communications, which are known by the acronym LR-WPAN (Low Rate Wireless Personal Area Network). The loss of coverage of a device involves a long process when it has to join again the wireless network, having associated a high delay and energy waste. These drawbacks imply this Orphan device stays a long time unable to...
This paper addresses offline virtual topology design in transparent optical networks under given periodic traffic. We call this planning problem ldquoScheduled Virtual Topology Designrdquo. Two problem variants are considered: for a network based on non-reconfigurable equipment and for a network based on reconfigurable equipment. Two MILP (Mixed Integer Linear Program) formulations are proposed, one...
IEEE 802.15.4 is a wireless technology aimed at the transmission of information at low rates and short distances. Therefore, the expected traffic carried by these networks is one whose transmission rates are low, i.e. information captured by sensors. The extension of this technology to higher data rates is a challenge that gives us the opportunity to support additional services. This paper deals with...
This paper evaluates the balance between the cost of multifibres and the cost of wavelength converters in multilayer networks. A novel ILP formulation of the static planning problem is applied.
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