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Estimating energy consumption and data rate in LTE networks is a critical issue for some recently proposed applications such as collaborative Internet access and energy-aware cellular data scheduling. In this study, after collecting data via empirical measurements, we provide realistic modeling with respect to LTE signal parameters such as RSRP, RSRQ and SINR. We applied various regression methods...
The Phantom cell concept is a solution for high-traffic outdoor environments that can also support good mobility and connectivity in ultra-dense network. In a phantom cells network, a centralized Macrocell controls all phantom cells within its coverage area and the C-Plane and U-Plane are split. Many issues need to be addressed for this architecture including radio resources allocation and cross/co...
Massive connectivity is one of the major goals of 5G mobile communications. NB-IoT systems are emerging as a way to achieve this goal. In this paper, we analyze the interferences between the LTE system and the NB-IoT system when they coexist.
The transmitted power of the very first message of access procedure to a 5G network is a relationship of initial power, offset, step power, and a number of re-transmissions. In the current networks, the access procedure is the same, whether or not there is external interference. A high external interference provide a higher probability to have access delay or fail. To mitigate this, the access procedure...
This paper talks about the most problematic issues brought by interferences in the New Generation Networks and their impact on the network s data throughput with focus on the inter-cell interferences. The most important ways to avoid interferences while planning a network are mentioned. In particular frequency reuse, power control and MIMO antenna arrays. Also, interference regeneration and cancelation...
4G Long Term Evolution (LTE) mobile system adopts Adaptive Modulation and Coding (AMC) as a link adaption mechanism that is based on the User Equipment (UE) periodically reporting channel condition summarised through Channel Quality Indicator (CQI) which, in turn, is based on Signal-to-Interference-plus-Noise Ratio (SINR) and Reference Signal Received Power (RSRP). Although CQI has a predominant role...
Management of Interference Is the solution designing for LTE network to reduce inter symbol interference (ISI) and intercell interference (ICI) using the frequency reuse schemes which has the objective to maximize the coverage area and provide more capacity in cells, especially in cell edge. Based on those propositions, this paper analyzes the process of optimizing subcarrier and power allocation...
As the need to satisfy the global demand for wireless services continues, the pressure for valuable spectrum adjacent to radiolocation services is a topic of contention between incumbent spectrum users and national spectrum policy makers and regulators. The study of the coexistence of radar systems and modern LTE communications systems tend to focus on the measurements of the spectrum impacts of the...
A decentralized power adjustment scheme based on non-cooperative game theory in a dense heterogeneous femtocell network is studied. Transmission power of the femtocell base stations are adjusted independently in a self-organizing manner to maximize the corresponding utility function, which consists of the signal-to-interference plus noise ratio and the transmission power of the femtocell base stations...
The growing requirements of mobile broad band services like MIMO, combined with OFDM involved in 4g wireless networks were met by Long Term Evolution (LTE).OFDM is used in communication systems to provide high data rates, and is more immune to intercarrier interference, and intersymbol interference. OFDM has become the core of LTE system. In this paper the performance of the system is evaluated interms...
The increasingly important role of Long Term Evolution (LTE) has increased security concerns among the service provider and end users and made security of the network even more indispensable. In this paper, the power control mechanism for LTE is explored. The unprotected power control signal together with the Cell Radio Network Temporary Identifier (CRNTI) can be exploited to trick the victim User...
Nowadays the mobile radio technology is largely used to deliver Internet contents. Many studies to investigate techniques to use more efficiently the already assigned spectrum are currently on going at international level.
In this article the cross-platform software and hardware solution for LTE key performance indicators optimization are developed. There are two important conflicting indicators are explained and optimized — LTE user's throughput and cell throughput versus different power control parameter settings such as nominal power per resource block and alpha for fractional power control. The results graphically...
With the vision of deployment of massive Internet-of-Things (IoTs) in 5G network, existing 4G network and protocols are inefficient to handle sporadic IoT traffic with requirements of low-latency, low control overhead and low power. To suffice these requirements, we propose a design of a PHY/MAC layer using Software Defined Radios (SDRs) that is backward compatible with existing OFDM based LTE protocols...
In this paper, we investigate the energy-efficient resource allocation problem in the downlink of an Orthogonal Frequency Division Multiple Access (OFDMA) system with multiple users. A iterative algorithm is developed to maximize the overall energy efficiency of the downlink transmission by allocating the resource blocks (RBs) and the transmit power, which is constant for all RBs assigned to a given...
Self-organizing wireless access networks rely on key configuration parameters that guarantee quality of operation. Poorly planned network access parameters, such as channel assignments or cell identifying codes, result in increased interference on system-critical control channels, network access failures, and poor quality of service. Therefore, the optimization of such network parameters is a vital...
Interference minimization while maintaining a target system sum rate by sharing resources among cellular User Equipments (UEs) and Device-to-Device pairs (D2D) is an important research question in Long Term Evolution (LTE). We propose a two phase resource allocation algorithm for this research problem. In the first phase, we use the bipartite matching algorithm to minimize the interference which also...
Deployment of low power base-stations (referred to as HetNet) within cellular systems can improve system capacity, coverage and enhance users experience. However, the inter-tier and intra-tier interference in such systems can significantly impact overall system performance, which makes interference and spectral resource management more complex. To build, operate HetNet networks, mobile operators have...
A heterogeneous system is based on an integration of different types of networks. In this paper, a system based on LTE and WIMAX for the Virtual University of Senegal is presented. It aims to study and optimize the system performance considering the Signal to Interference plus Noise Ratio (SINR), the blocking probability, user communications, and mobility loss. A Markov chain was used to assess and...
The growing demand on data to enhance the user experience has motivated research toward increasing the efficiency of spectrum utilization by extending cellular technology such as LTE toward unlicensed bands. In order to study the effect of channel access priorities on coexistence of several LAA networks, we consider load based equipment (LBE) based MAC protocol where we use stochastic geometry to...
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