New PDF release: Advances in Ubiquitous Networking: Proceedings of the

By Essaïd Sabir, Hicham Medromi, Mohamed Sadik

ISBN-10: 9812879897

ISBN-13: 9789812879899

ISBN-10: 9812879900

ISBN-13: 9789812879905

This quantity publishes new traits and findings in sizzling issues relating to ubiquitous computing/networking. it's the end result of UNet - ainternational clinical occasion that happened onSeptember 08-10, 2015, within the interesting urban of Casablanca, Morocco. UNet’15 is technically backed by way of IEEE Morocco part and IEEE COMSOC Morocco Chapter.

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    Extra info for Advances in Ubiquitous Networking: Proceedings of the UNet’15

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    We turn now to the illustration of stability of generalized aloha. 1. for static pa , we note that at low load (saturation), aloha is better than aloha generalized. e. only some of mobiles have packets to be transmitted, the fact of the new transmission delay reduces the success rate. On the other hand when the number of saturated sources becomes large, aloha generalized becomes more powerful as the mechanism Generalized Slotted Aloha Revisited: A Throughput and Stability Analysis 11 (a) (b) Fig.

    Fig. 2 Markov chain of primary activity Now, let us define the utility function for the secondary user. If the Secondary user chooses to pay for the proposed solution, thus it will gain direct access to the licensed channel without sensing, whereas if it chooses not to pay for the service, there will not be any loss of money, nonetheless the SU will lose the energy αs dissipated on sensing the channel and when this channel is idle it can transmit trough it. (1 − P f a(τ ) )B − αs if SU r ejects leasing 43 (2) B here is the throughput gain obtained when paying the fee f .

    Q L ) whereas tagged leader m L retransmits with probability p L . Under rationality, each user seeks to maximize its own function utility. F L F L L F Define the set BRmF ((q F )−m , (q L )−m , p L ) and BRmL ((q L )−m , (q F )−m , p F ) F as the set of best response strategies of tagged follower m and tagged leader m L respectively, it can be written as BR F (q F )−m , (q L )−m , p L ) = argmax Um F (q F )−m , p F , (q L )−m , p L F L F L (4) pF BRmL L (q L )−m , (q F )−m , p F = argmax Um L (q F )−m , p F , (q L )−m , p L L F F L (5) pL Definition 2.

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    Advances in Ubiquitous Networking: Proceedings of the UNet’15 by Essaïd Sabir, Hicham Medromi, Mohamed Sadik


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