9 documents found, page 1 of 1
Spectrum sharing for LTE and 5G-NR coexistence
Busari, Sherif Adeshina; Correia, Noélia; Saghezchi, Firooz B.; Mumtaz, Shahid; Rodriguez, JonathanSpectrum sharing provides a rapid migration pathway toward 5G by enabling the coexistence of 4G LTE and 5G new radio (NR) that share the same spectrum. Due to significant differences in the LTE and 5G-NR air interfaces, several enablers are required to facilitate the spectrum sharing. In this study, we explore the coexistence features and investigate their impacts on network performance. For static and dynamic ...
Cooperative communication for future wireless network virtualization
B.D., Parameshachari; Mumtaz, Shahid; Kara, Ferdi; Rinaldi, StefanoNo abstract available.
Performance evaluation of radio resource schedulers in LTE and 5G NR two-tier H...
Busari, Sherif Adeshina; Correia, Noélia; Mumtaz, Shahid; Rodriguez, Jonathan; Saghezchi, Firooz B.Network performance is critically dependent on the employed radio resource scheduler (RRS). The impact becomes even more significant in 5G ultra-dense networks due to the challenges of complicated base station distribution, user association, load balancing and inter-cell interference, among others. Using a combination of three popular schedulers (i.e., round robin (RR), proportional fairness (PF) and best chann...
A novel mapping technique for ray tracer to system-level simulation
Khan, Muhammad Awais; Busari, Sherif Adeshina; Saidul Huq, Kazi Mohammed; Mumtaz, Shahid; Al-Rubaye, Saba; Rodriguez, Jonathan; Al-Dulaimi, AnwerSimulations have become remarkably useful in evaluating the performance of new techniques and algorithms in communication networks. This is due to its comparative cost, time and complexity advantage over the analytical and field trial approaches. For large-scale networks, system-level simulators (SLS) are used to assess the performance of the systems. The SLS typically employs statistical channel models to char...
Securing Cognitive Radio Networks using blockchains
Sajid, Adnan; Khalid, Bilal; Ali, Mudassar; Mumtaz, Shahid; Masud, Usman; Qamar, FarhanDue to the increase in industrial applications of Internet of Things (IoT), number of internet connected devices have been increased accordingly. This has resulted in big challenges in terms of accessibility, scalability, connectivity and adaptability. IoT is capable of creating connections between devices on wireless medium but the utilization of scarce spectrum in efficient manner for the establishment of the...
Smart cameras are making our beaches safer: a 5G-envisioned distributed archite...
Alam, Muhammad; Ferreira, Joaquim; Mumtaz, Shahid; Jan, Mian Ahmad; Rebelo, Rui; Fonseca, Jose AlbertoWith the explosive growth of smart city and Internet of Things (IoT) applications in recent years, a series of efforts has been undertaken to bring more intelligence to the smart cities and public transportation to solve essential problems like human surveillance for safety, traffic, and congestion management. In this article, we define a fifth-generation (5G)-envisioned architecture to enable cooperative sensi...
Scenarios and Architectures for RRM and Optimization of Heterogenous Networks
Sousa, Sofia C.; Velez, Fernando J.; Huq, Kazi; Mumtaz, Shahid; Rodrigues, JonathanThis work summarizes the state of the art information related to scenarios and architectures from Energy-efficient High-speed Cost Effective Cooperative Backhaul for LTE/LTE-A Small-cells (E-COOP) technologies. One of the proposed architectures exploits infrastructure based on small cell deployment using RRU technology which is connected to the core network using backhaul technology based on fibre optic links. ...
Performance analysis of 4G wireless networks using system level simulator
Mumtaz, ShahidIn the last decade, mobile wireless communications have witnessed an explosive growth in the user’s penetration rate and their widespread deployment around the globe. In particular, a research topic of particular relevance in telecommunications nowadays is related to the design and implementation of mobile communication systems of 4th generation (4G). 4G networks will be characterized by the support of multiple...
Ad-hoc behavior in opportunistic radio
Gameiro, Atílio; Mumtaz, Shahid; Rodriguez, Jonathan; Marques, PauloThe application of mathematical analysis to the study of wireless ad hoc networks has met with limited success due to the complexity of mobility, traffic models and the dynamic topology. A scenario based UMTS TDD opportunistic cellular system with an ad hoc behaviour that operates over UMTS FDD licensed cellular network is considered. In this paper, using an ah-hoc behavior in opportunistic Radio, we present ho...