The electrical properties of biological cells, tissues, and organs studied in electrophysiology not only provide information about the normal/abnormal activities of human bodies but also provide a means to directly restore, repair, replace, or recreate physiological functions in humans to improve quality of life. For example, cardiac pacemakers, implanted in millions of patients, deliver electrical pulses into…
Omnet++ Simulator
Passing the torch: Role alternation for fair energy usage in D2D group communication
By using device-to-device (D2D) communication, opportunistic networks promise to fill the gaps of thenetworking infrastructure in remote areas, to enable communication in emergency situations, and to inspire new applications. Yet, to become feasible in practice and accepted by users, it is crucial that the energy costs of D2D connections are small and shared fairly. Fairness, in particular, is a…
Evaluating the gap between compressive sensing and distributed source coding in WSN
Despite the large body of theoretical research available on compression algorithms for wireless sensornetworks (WSNs), only recently have researchers started to design and analyze practical distributed compression techniques. Also, approaches belonging to different fields such as signal processing (e.g., discrete Fourier transforms and compressive sensing) or information theory (e.g., distributed source coding) and networking are seldom evaluated against one another. In the…
Impact of pilot symbols design on the performance of the LTE system
Improving spectral efficiency as well as link reliability has become imperative in nowadays wireless communications. To achieve this purpose, combining Multiple Input Multiple Output (MIMO) architecture with Orthogonal Frequency Division Multiplexing (OFDM) technique is a widely accepted solution and has been implemented in various communication standards. Channel estimation is a critical processing step which is…
An optimal application-aware resource block scheduling in LTE
In this paper, we introduce an approach for application-aware resource block scheduling of elastic and inelastic adaptive real-time traffic in fourth generation Long Term Evolution (LTE) systems. The users are assigned to resource blocks. A transmission may use multiple resource blocks scheduled over frequency and time. In our model, we use logarithmic and sigmoidal-like utility…
On fairness in LTE downlink MAC scheduling algorithms
A downlink MAC scheduler aims to improve the radio resources utilization in the Long Term Evolution (LTE) network. The MAC scheduler is responsible for sharing the available radio Resource Blocks (RBs) among different User Equipment (UEs) in time and frequency domains. Several downlink MAC schedulers have been proposed and implemented; however, providing fairness in terms…
Re-Dimensioning Number of Active eNodeBs for Green LTE Networks Using Genetic Algorithms
With the tremendous growth of cellular networks, energy consumption reduction has become a critical requirement. Recent research has focused on the base station as the main constituent that drains the highest percentage of energy consumption within cellular infrastructures. In LTE, the predominance of data traffic might result in significant volatility in traffic loads across evolved Node…
Resource Allocation Strategies for Network-Coded Video Broadcasting Services Over LTE-Advanced
Video service delivery over 3GPP Long Term Evolution-Advanced (LTE-A) networks is gaining momentum with the adoption of the evolved Multimedia Broadcast Multicast Service (eMBMS). In this paper, we address the challenge of optimizing the radio resource allocation process so that heterogeneous groups of users, according to their propagation conditions, can receive layered video streams at…
Enabling Device to Device Broadcast for LTE Cellular Networks
In recent years, the public safety community has been aligning behind LTE (Long Term Evolution) technology as the basis for next generation public safety networks. Correspondingly, the 3GPP (3rd Generation Partnership Project) standards body has started multiple technical work initiatives on LTEenhancements to better support public safety use cases and requirements. Of particular importance to the public safety…
STS: Space-time scheduling for coordinating self-organization network functions in LTE
Self-Organizing Networks (SON) and a number of SO functions (SFs) have been proposed, e.g. in theLTE standard. Since SFs operate on the same network, adjusting the same set of parameters, conflicts arise. Mechanisms are thus required to resolve or minimize these conflicts. We propose Space-Time scheduling procedures that allow for separating the execution of SFs at…