Jonathan Rodriguez

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Direct mobile-to-mobile communication, also known as device-to-device (D2D), is expected to be a part of LTE-A in 3GPP Release 12. Direct communication will improve spectrum efficiency, overall system throughput, and energy efficiency, and decrease the delay between devices. It will enable new peer-to-peer and location-based applications and services.(More)
The new IEEE 802.21 standard specifies link layer intelligence and other related network information to upper layers in order to optimize handovers between networks of different types, such as WiMAX, Wi-Fi, and 3GPP. This paper makes a short description of 802.21 standard, how it is implemented in ns-2, and the signaling used in a handover between WiMAX and(More)
Cooperative spectrum sensing is envisaged to increase reliability in cognitive radio networks. Several users cooperate to detect the availability of a wireless channel. In this framework, some malicious users may affect the decisions taken by the cognitive users by providing false information, introducing spectrum sensing data falsification (SSDF). In this(More)
Ad hoc networks are temporary networks with a dynamic topology which doesn’t have any established infrastructure or centralized administration. These networks need efficient routing protocols in terms of Quality of Services (QoS) metrics. In this paper we present performance comparisons of the DSDV, AODV, DSR and TORA routing protocols with respect to(More)
The demand for higher data rates and improved energy-efficiency have motivated the deployment of short-range, low-cost, consumer-deployed cellular access points, referred to as femtocells [1]. Femtocells are consumer-deployed cellular access points, which interconnect standard user equipment (UE) to the mobile operator network via the end user’s broadband(More)
This article surveys all known fields of network coding theory and leads the reader through the antecedents of the network coding theory to the most recent results, considering also information theory and matroid theory. By focusing on providing ideas and not formulas, this survey is both fitted for the taste of readers who are mathematically oriented and(More)
This paper investigates advanced energy-efficient wireless systems in orthogonal frequency division multiple access (OFDMA) downlink networks using coordinated multi-point (CoMP) transmissions between the base stations (BSs) in heterogeneous network (HetNet) which is adopted by 3GPP LTE-Advanced to meet IMT-Advanced targets. HetNet CoMP has received(More)