@conference {Oualhaj2016, title = {A college admissions game for content caching in heterogeneous delay tolerant networks}, booktitle = {2016 23rd International Conference on Telecommunications, ICT 2016}, year = {2016}, note = {cited By 0}, abstract = {In recent years, Delay Tolerant Networks (DTNs) have been successfully presented as a possible extension of the Internet architecture in order to provide communication support to existing networks. However, these networks have a major issue which is the coordination among relays. In this paper, we propose a novel mechanism source-relay association approach for heterogeneous DTNs that exploits the information about the history and predictability of the relay nodes while also we focus on the source packet dissemination to a destination using tow-hop relaying scheme, considering network resource constraints: the relay buffer, the packet life time, and the energy consumption according to the mobile technologies. We formulate the problem as a college admissions game in which a number of colleges, i.e., data source seek to recruit a number of students, i.e., relays nodes. In this game, the data source and relays nodes rank one another based on preference functions that capture the data sources need to optimize their utilities which are functions of packet success rate and delay. We propose a novel distributed algorithm that leads to a stable matching among data sources and relays nodes. We show that the proposed approach can yields the better performance improvement of the traffic among the source and destination node. {\textcopyright} 2016 IEEE.}, doi = {10.1109/ICT.2016.7500348}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84979210767\&doi=10.1109\%2fICT.2016.7500348\&partnerID=40\&md5=641b2fc904d804463ca747bb6dedfe63}, author = {Oualhaj, O.A.a and Sabir, E.b and Kobbane, A.a c and Ben-Othman, J.c and Koutbi, M.E.a} } @article {Elmachkour20151316, title = {Data traffic-based analysis of delay and energy consumption in cognitive radio networks with and without resource reservation}, journal = {International Journal of Communication Systems}, volume = {28}, number = {7}, year = {2015}, note = {cited By 6}, pages = {1316-1328}, abstract = {A new opportunistic cross-layer MAC protocol involving channel allocation and packet scheduling for cognitive radio networks is proposed. Cognitive radio allows secondary users (SUs) to exploit the available portions of the licensed spectrum bands without interfering with primary users. In particular, we consider a cognitive radio system, where SUs are equipped with two transceivers: a control transceiver and a software-defined radio transceiver. Data traffic characteristics of SUs are considered to ameliorate system performance. So, we propose a mechanism of resource reservation to improve QoS requirements that favors successful SUs to transmit data during x time slots without interfering with primary users. The key novelty of this paper is giving priority for SUs with important data traffic and which frequently solicits data channels to transmit for the remaining time of the ongoing time slot and for the next time slots directly after checking the channel availability. We develop a new analytical model to evaluate delay parameter for two scenarios with and without resource reservation and we then investigate the impact of those scenarios on the energy consumption. We show through simulations that cognitive radio performances increase noticeably with the proposed scheme. Copyright {\textcopyright} 2014 John Wiley \& Sons, Ltd.}, doi = {10.1002/dac.2764}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84925355761\&doi=10.1002\%2fdac.2764\&partnerID=40\&md5=ecf737b718373c4b7731373c0afd1200}, author = {Elmachkour, M.a and Kobbane, A.a c and Sabir, E.b and Ben-Othman, J.c and El Koutbi, M.a} }