In this paper, we investigate the design of a radio resource control (RRC) protocol in the framework of long-term evolution (LTE) of the 3rd Generation Partnership Project regarding provision of low cost/complexity and low energy consumption machine-type communication (MTC), which is an enabling technology for the emerging paradigm of the Internet of Things. Due to […]
Read moreMobile data traffic is expected to increase 11-fold between 2013 and 2018. A more dynamic and flexible network is needed to cope with the growing data volume. Software defined networking (SDN) enabled by, for example, the OpenFlow protocol is a potential solution to improve the flexibility and agility of the mobile data network by decoupling […]
Read moreHexagonal focused arrays operating at 433MHz for microwave hyperthermia have been designed for the first time by optimizing the power transmission efficiency of the system consisting of the transmitting hexagonal array, a testing (receiving) antenna introduced in the target area, with an equivalent phantom representative of human body in between. The excitations of the arrays are obtained by […]
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The NLMS Algorithm with Time-Variant Optimum Stepsize Derived from a Bayesian Network Perspective
In this letter, we derive a new stepsize adaptation for the normalized least mean square algorithm (NLMS) by describing the task of linear acoustic echo cancellation from a Bayesian network perspective. Similar to the well-known Kalman filter equations, we model the acoustic wave propagation from the loudspeaker to the microphone by a latent state vector […]
Read moreCognitive radio networks using relays have been introduced to enhance secondary network performance by having secondary users (SUs) transmit in two hops. This paper develops a framework for a random cognitive relay network (RCRN) where the primary, secondary, and relay nodes are randomly distributed according to Poisson point processes (PPPs) to investigate the effect of […]
Read moreTo increase the energy efficiency of Ethernet networks, in 2010, the IEEE published the IEEE 802.3az amendment, known as Energy Efficient Ethernet (EEE). The amendment introduces a new operational mode, defined as Low Power Idle (LPI), that allows to considerably reduce the power consumption of inactive Ethernet links. In this paper, we address the application […]
Read moreRelay nodes (RNs), as important components of heterogeneous networks introduced in Long-Term Evolution-Advanced systems, are employed to improve network capacity and extend cell coverage in a cost-effective manner. In heterogeneous relay networks, there are two types of user access connections: the direct link and the two-hop link. The former is used when a user accesses the […]
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Folded Cavity-Backed Crossed-Slot Antenna
A folded, cavity-backed crossed-slot antenna is proposed for antenna miniaturization. The cavity dimensions of a conventional cavity-backed crossed-slot antenna are about a half-guided-wavelength along each side, which is unsuitable in many applications like a handheld device or body area network(BAN). To reduce the size of the cavity, a folded cavity is proposed in this letter. The center plate […]
Read moreThis paper presents a polarization-controlled active antenna applied to BAN on-body communications. A primal objective is to achieve the enhancement of signal power, not only in downlink but also in uplink dynamic channels, between an access point mounted on the wrist and a sensor module attached to various locations on a human body. The proposed antenna is […]
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Coordinated voltage control in distribution grids with LTE based communication infrastructure
In modern distribution grids voltage problems are likely to be more common and more significant, due to the high penetration of Distributed Generation (DG) that can vary their in-feed in short times. Coordinating these DGs, either in a centralized or distributed fashion, to maintain voltage at prescribed limits may be one effective solution. However, this […]
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