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As the data traffic demand increases continuously, LTE Heterogeneous Networks (HetNets) with macro-cells and small-cells seems to be the best solution to enhance the quality of user experience by increasing the coverage and capacity of cellular networks. One of the important challenges in such networks is the user association problem. Several approaches have been proposed for this purpose: based for...
Recently, mobile broadband networks are focused on bringing additional capabilities to the network edge. For instance, Mobile Edge Computing (MEC) brings storage and processing capabilities closer to the mobile user i.e., at the radio access network, in order to deploy services with minimum delay. In this paper, we propose a resource constrained cloud-enabled small cell that includes a MEC server...
The small-cell base station requires a high linearity, high reliable and high efficiency power amplifier to enhance signal strength in a coverage region. To meet the demand, the 2.6 GHz two-way symmetrical Doherty power amplifier module which uses modularized components, enhances system stability and integrates with heat sink is proposed. The experimental results show that the proposed module delivers...
Dual Connectivity(DC) is one of the key technologies standardized in Release 12 of the 3GPP specifications for the Long Term Evolution (LTE) network. It attempts to increase the per-user throughput by allowing the user equipment (UE) to maintain connections with the MeNB (master eNB) and SeNB (secondary eNB) simultaneously, which are inter-connected via non-ideal backhaul. In this paper, we focus...
Experimental setups for cellular communications have always been a rare commodity in academia. The advent of software-defined radios (SDRs) paved the way for researchers to prototype their ideas on real hardware. However, existing SDR platforms and their associated reference design codes mostly provide basic cellular functionality with limitations such as low numbers of users and computational capacity...
This paper presents a completely wireless small cell unit for mobile communication systems with lowest possible power consumption. It consists of a simple frequency conversion from millimeter-wave backhaul to access frequencies based on the self-heterodyning concept with only analog amplifiers as active components. This enables an energy autonomous operation based on tiny solar panels, greatly simplifying...
The Third Generation Partnership Project (3GPP) has been working on developing specifications on Machine to Machine Communications (M2M) and on the emerging Internet of Things (IoT) bringing light into the associated service and network requirements. This paper presents a special form of M2M/IoT communication, where at least one communication device is part of a vehicle that automatically communicates...
This paper presents a 15-bit digital power amplifier (DPA) with 1.6W saturated output power. The topology of the polar switched-current DPA is discussed together with the architecture of the output transformer which is implemented in BEOL as well as in WLCSP metal layers. The chip is fabricated in a standard 28nm CMOS process and exhibits an EVM of 3.6%, E-UTRA ACLR of 34.1dB, output noise of −145...
This paper proposes an automated test framework for eNodeB's physical layer development, comprising procedures for checking data integrity, stability and performance. The proposed framework is based on a simplified LTE MAC layer, which operates as a software element that communicates directly with the physical layer and performs mapping procedures between logical and physical channels, reception and...
The continuous evolution of mobile networks is demanding and promising. The increase in mobile population, the introduction of new applications and use cases which represents a major shift in the paradigm from voice to data especially with the adoption of the IP network from the internet in the mobile networks. This has imposed challenges in current architecture of mobile networks in terms of backhaul...
Cloud Radio Access Network (C-RAN) is emerging as a transformative architecture for the next generation of mobile cellular networks. In C-RAN, the Baseband Unit (BBU) is decoupled from the Base Station (BS) and consolidated in a centralized processing center. While the potential benefits of C-RAN have been studied extensively from the theoretical perspective, there are only a few works that address...
The traffic in optical and mobile networks has been rapidly increasing. The peak rate of 5G mobile networks will be comparable to that of FTTH. In this paper, we will discuss integrated optical and wireless technologies for mobile front-haul networks towards 5G era and beyond.
Automotive industry will be greatly benefited by the advent of 5G Networking and the huge boost in performance and coverage it will support. Road safety and traffic efficiency services will be significantly upgraded through seamlessly interconnected devices, while latency decrease will most likely allow autonomous driving to become a commodity, available to everyone. This technology will have a huge...
In 5G heterogeneous evolution, the unlicensed band has captured much attention. Specified by 3GPP Release 13, LTE WLAN aggregation (LWA) is deemed as an effective approach for spectrum integration of 5G heterogeneous networks (HetNet). However, most of previous works about LWA lie in the architecture design, and rarely investigate LWA algorithm analytically. In this paper, we formulate the network...
Although connectivity services have been introduced already today in many of the most recent car models, the potential of vehicles serving as highly mobile sensor platform in the Internet of Things (IoT) has not been sufficiently exploited yet. The European AutoMat project has therefore defined an open Common Vehicle Information Model (CVIM) in combination with a cross-industry, cloud-based big data...
The next generation mobile network is foreseen as a heterogeneous network comprising not only the evolved existing systems but also the new radio (NR) spanning over the whole spectrum. Multi-connectivity (MC), where a UE aggregates the radio resources from multiple cells, provides an efficient way to fulfill the diverse 5G requirements. In 3GPP, Dual connectivity (DC) and carrier aggregation (CA)...
Due to the rapid increase in data traffic, one of the solutions provided by mobile operators is to operate Long Term Evolution (LTE) in the unlicensed 5GHz band, as the licensed spectrum is becoming scarce. Mobile operators can expand their network capacity by operating LTE in the unlicensed band at lower cost when compared with using other licensed bands. Device to Device (D2D) communication, proven...
Resource allocation and traffic aggregation is becoming a significant part of the network deployment as it is expected that operators will offer advanced services through 5G systems. Scheduling procedures need to be fair but also to handle requirements set for diverse groups of users forming network slices. Heterogeneous networks will need to be controlled locally and the traffic could be split between...
This paper describes the experimentation on the Future Internet Research & Experimentation (FIRE) Long Term Evolution (LTE) testbeds for open experimentation (FLEX) facilities by combining the existing Evolved Node B (eNB) with an execution infrastructure. In this direction, LTE Edge Network Enhancement with Core Functionalities (LENA) project will enhance the LTE FLEX testbed with a Network Function...
The 5G network is a Heterogeneous network, which combines different types of infrastructures and different standards such as WLAN, WIMAX, 3G, 4G, operating in different frequencies, and having different architecture. The implementation of Heterogeneous architectures trend to enhance the coverage and the capacity of the network, and boost spectral efficiency. The integration of these architectures...
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