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Electromagnetic cavity shielding in RF circuit design is a vital part of electromagnetic compatibility and signal integrity. For 4G frequencies this is relatively easy to achieve as the cavity size tends to be small compared to the wavelength. In 5G technology, where carrier frequencies are in very high frequencies (e.g. 20GHz to 70GHz), practical cavity dimensions are comparable to the wavelength...
Resource Management (RM) in fifth generation (5G) radio access network has been the subject of extensive study in recent years. An agile RM framework should encompass greatly-improved services from previous mobile network generations along with advanced new services meeting the challenging requirements, like massive data rate and ultra-low latency. The novel aspects of 5G system lies within co-existence...
In this paper, we study fairness and sum rate performance issues in uplink non-orthogonal multiple access (NOMA) communication system by allocation of subbands and power to users. In a NOMA system, each subband can be shared by L users simultaneously, which leads to higher spectral efficiency than the Orthogonal Multiple Access (OMA) system. It has been studied that, without proper allocation of target...
The ongoing efforts in the research, development and standardization of 5G, by both industry and academia, have resulted in the identification of enablers (Software Defined Networks, Network Function Virtualization, Distributed Mobility Management, etc.) and critical areas (Mobility management, Interference management, Joint access-backhaul mechanisms, etc.) that will help achieve the 5G objectives...
In a modern telco cloud, network functions are performed by groups of single or interconnected virtual machines (VMs), which form virtualized network functions (VNFs). Securing these VNFs is both important and challenging, since the VNFs might be performing some mission critical operations and exchanging sensitive information among each other. The problem lies in the implementation of current cloud...
Integrating different radio access technologies (RATs) is one effective method to meet the demand to provide ever increasing data rates to the users. For integrating LTE and WLAN in particular, the purpose is to enhance the operators control of when the UE uses WLAN. Another aim, in addition to better network control on which RAT is used, is the possible data aggregation which enables simultaneous...
Energy efficiency is among the most important network performance metrics, particularly when the end devices rely on limited energy sources, which is the case in many applications of the Internet of Things. In these cases, optimizing energy efficiency is tantamount to increasing the network lifetime. We focus on Low-Power Wide-Area Networks using the LoRaTM platform, and provide a thorough characterization...
Digital revolution and recent advances in telecommunications technology enable to design communication systems which operate within the regions close to the theoretical capacity limits. Ever-increasing demand for wireless communications and emerging numerous high-capacity services and applications mandate providers to employ more bandwidth-oriented solutions to meet the requirements. Trend and predictions...
The high risk of random access collisions leads to huge challenge for the deployment massive Machine-Type Communications (mMTC), which cannot be sufficiently overcome by current solutions in LTE/LTE-A networks such as the extended access barring (EAB) scheme. The recently studied approaches of grouped random access have shown a great potential in simultaneously reducing the collision rate and the...
Next generation cellular networks (5G) have to deal with deployment of massive machine-type-communication (MTC) devices as the internet of things (IoT) becomes pervasive. To cater to such demand, 3GPP has finalized specifications for enhanced machine type communication (eMTC) and narrowband IoT (NB-IoT) as part of LTE Release 131. To avoid resource congestion to legacy users, eMTC communication can...
In 3GPP Rel-13, a narrowband system, named Narrowband Internet of Things (NB-IoT), has been introduced to provide low-cost, low-power, wide-area cellular connectivity for the Internet of Things. Further enhancements have been made to this system in subsequent 3GPP releases. In this paper, we describe Rel-14 enhancements that have been standardized for NB-IoT. They include positioning support, multicast...
The discussion around Network Slicing for 5G Systems is slowly converging to concrete solutions which will be adopted in the early deployment of 5G Networks due by 2020. In particular, within 3GPP standardization body, study items recently completed have finalized the definition of 5G System architecture, comprising Access and Core Networks, and defined the key design principles for End to End Network...
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