Khalil Ibrahimi

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In this paper we study the capacity of wireless cellular network, in particular the uplink of WCDMA system by using the two dimensional continuous-time Markov chain (CTMC) technique. Considering two types of calls: real-time (RT) calls characterized by a quasi fixed transmission rate, and best-effort (BE) calls which do not require strict demand but need(More)
The Adaptive Modulation and Coding (AMC) scheme which handles user's mobility issue plays a significant role to improve the desired quality of service in High Speed Downlink Packet Access (HSDPA) networks. We develop a resource allocation which maintains constant bit rate for real-time (RT) and non-real-time (NRT) calls independently of the user position in(More)
Recently Underwater Sensor Networks (UWSNs) have been suggested as a powerful technology for many civilian and military applications, such as tactical surveillance. The most important issue in these networks is the communication, mainly due to the presence of fading, multi-path and refractive properties of the sound channel, this necessitate the development(More)
The trust is one of the crucial and important factors for decision making in online social network. In this paper, we compute explicitly the level of trust, distrust and uncertainty between two users using social interactions. The study of social interactions is fundamental to understanding the dynamics of relationships between users and their behaviors in(More)
The capacity of CDMA wireless network is usually studied considering two classes of services: real-time and best-effort. In this paper, we are interested in analyzing sharing between three classes of services: real-time (RT), non-real-time (NRT) and best-effort (BE). A classical approach which is widely used in wireless networks is based on adaptively(More)
Recently Underwater wireless Sensor Networks (UWSNs) have been suggested as a powerful technology for many civilian and military applications, such that tactical surveillance. Geographic routing that uses the position information of nodes to route the packet toward a destination is preferable for UWSNs. In this paper, we propose a New Greedy Forwarding(More)
We consider a WCDMA system with two types of calls: real time (RT) calls that have dedicated resources, and data on real time (BE) calls (i.e. best effort) that share system capacity. We consider reservation of some capacity resources for the BE traffic as well as any capacity left over from RT calls. Our analysis approach is based on modeling of the system(More)
In this paper, we revisit the power control problem in wireless networks by introducing a signaling game approach. This game is known in the literature as "Cheap Talk". Under the considered scenario, we consider two players named player I and player II. We assume that player I only knows his channel state without any information about the channel state of(More)