26 documents found, page 1 of 3
MOOC as a Way of Dissemination, Training and Learning of Telecommunication Engi...
Gil Jiménez, Víctor P.; Urquiza Villalonga, David Alejandro; López Morales, Manuel José; Medda, Daniele; Seitianitis, Ilias-NektariosIn this chapter, the use of massive open online courses (MOOCs) for the dissemination, training capabilities and learning of telecommunication engineering is described taking as example the successful MOOC ‘Ultra- Dense Networks for 5G and its Evolution’ developed under the European innovative training network (ITN) TeamUp5G. MOOCs are usually understood as a way of teaching or learning for massive potential st...
Survey on 5G Second Phase RAN Architectures and Functional Splits
Bahram, Khan; Nidhi, Nidhi; OdetAlla, Hatem; Flizikowski, Adam; Mihovska, Albena Dimitrova; Wagen, Jean-Frédéric; Velez, FernandoThe Radio Access Network (RAN) architecture evolves with different generations of mobile communication technologies and forms an indispensable component of the mobile network architecture. The main component of the RAN infrastructure is the base station, which includes a Radio Frequency unit and a baseband unit. The RAN is a collection of base stations connected to the core network to provide coverage through o...
Design of Coordinated HeNB Deployments
Paulo, Rui; Velez, Fernando; Piro, GiuseppeUncoordinated deployment of HeNBs has been widely considered, in the research community. However, due to economic or physical constraints, a coordinated deployment of HeNBs can also be considered. This work studies a selected examples of HeNB deployment. We consider the deployment of four Enterprise HeNB which serve up to 8 simultaneous users, in a building, with a geometry of 5x5 apartments. From the theoretic...
Cost/Revenue Trade-Off of Small Cell Networks in the Millimetre Wavebands
Teixeira, Emanuel; Velez, FernandoIn this work, we identify and discuss the potentialities of mobile cellular communications in the millimetre wavebands, showing that very high bit/data rates can be supported in small cells with short-range coverage. We study the behaviour of the carrier-to-noise-plus-interference ratio with the coverage distance (and the actual distance from users to the eNBs) in actual environments and the respective analysis...
Insights on Spectrum Sharing in Heterogeneous Networks with Small Cells
Silva, Bruno C.; Sousa, Sofia C.; Teixeira, Emanuel; Velez, FernandoThis work explores the viability of 5G New Radio spectrum sharing in Ultra High Frequency (UHF), Super High Frequency (SHF) and millimetre wavebands(mmWaves) in outdoor environments. In the mmWaves the linear cellular topology is considered while in the UHF/SHF bands cells with hexagonal shape are assumed. Performance evaluation includes the study of the behaviour of PHY and supported throughput for 2.6, 3.5, 2...
Performance Evaluation and Packet Scheduling in HeNB Deployments
Paulo, Rui R.; Velez, Fernando; Piro, GiuseppeThe unsupervised and chaotic deployment of Home eNBs (HeNBs) is leading to high levels of interference. To understand the behaviour of the interference of these uncoordinated deployments is vital to reach significant capacity improvement and also to explore opportunities to save energy. This paper considers high and middle interference level scenarios, with a maximum of four users per cell. HeNBs indoor deploye...
Performance Evaluation of Source Routing Minimum Cost Forwarding Protocol over ...
Ramos, Anderson; Velez, Fernando; Gardašević, GordanaThe aim of this work is the development of Source Routing Minimum Cost Forwarding (SRMCF) protocol over IPv6 over the TSCH mode of IEEE 802.15.4e (6TiSCH), evaluating the performance of these protocols for the Internet of Things (IoT). To perform this evaluation, this work is making use of the OpenWSN project platform, which implements IEEE 802.15.4e in an open source environment. The evaluation process is also...
Transmitted Power Formulation for the Optimization of Spectrum Aggregation in L...
Acevedo Flores, Jessica Elizabeth; Robalo, Daniel; Velez, FernandoThis work starts by proposing a formulation to calculate the transmitter power needed to cover cells of different sizes, whilst maintaining the average signal to interference-plus-noise ratio constant, and near the maximum, for two Long Term Evolution (LTE) systems operating over non-contiguous frequency bands, 800 MHz and 2 GHz, with an integrated common radio resource management (iCRRM) entity. In the context...
Impact of considering the ITU-R two slope propagation model in the system capac...
Sousa, Sofia; Velez, Fernando; Peha, JonThis work aims at understanding and evaluating the impact of using different path loss models in the optimization trade-off of small cell (SC) networks. In LTE-A, the more realistic propagation models are the more efficient the radio and network optimization becomes. In this work we compare four urban path loss models: the urban/vehicular and pedestrian test environment from the ITU-R M. 1255 Report as well as ...
Supporting unified distributed management and autonomic decisions: design, impl...
Ferreira, Carlos; Guardalben, Lucas; Gomes, Tomé; Sargento, Susana; Salvador, Paulo; Robalo, Daniel; Velez, FernandoNowadays, the prevailing use of networks based on traditional centralized management systems reflects on a fast increase of the management costs. The growth in the number of network equipments and services reinforces the need to distribute the management responsibilities throughout the network devices. In this approach, each device executes common network management functionalities, being part of the overall ne...