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In this paper, we address an important problem in mobile ad hoc networks, namely, the intrinsic inefficiency of the standard transmission control protocol (TCP), which has not been designed to work in these types of networks. After an initial training phase, we predict the mobility status of the network through a probabilistic approach, and we propose a series of ad hoc strategies to counteract the...
Retransmission strategies have been widely investigated in wireless networks, since they are able to grant considerable benefits in dynamic environments. Distributed schemes, based on cooperative techniques, can also add the benefits of spatial diversity, particularly if combined with Multi-User Detection decoding schemes. However, the impact of each scheme on the rest of the network cannot be neglected,...
Relay sharing has been recently investigated to increase the performance of coexisting wireless multi—hop networks. In this paper, we analyze a scenario where two wireless ad hoc networks are willing to share some of their nodes, acting as relays, in order to gain benefits in terms of lower packet delivery delay and reduced loss probability. Bayesian network analysis is exploited to compute the probabilistic...
In this paper we address the problem of provisioning Quality of Service (QoS) to Voice over IP applications in a Wireless LAN scenario based on the IEEE 802.11 standard. We propose the use of a Cognitive Network approach to design a Call Admission Control (CAC) scheme, according to which each user stores relevant information on its past network experience and then uses such information to build a...
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