Search results for "Gatto"

Energy-Efficient Edge Computing Service Provisioning for Vehicular Networks: A Consensus ADMM Approach

2019

In vehicular networks, in-vehicle user equipment (UE) with limited battery capacity can achieve opportunistic energy saving by offloading energy-hungry workloads to vehicular edge computing nodes via vehicle-to-infrastructure links. However, how to determine the optimal portion of workload to be offloaded based on the dynamic states of energy consumption and latency in local computing, data transmission, workload execution and handover, is still an open issue. In this paper, we study the energy-efficient workload offloading problem and propose a low-complexity distributed solution based on consensus alternating direction method of multipliers. By incorporating a set of local variables for e…

Energy efficient and distributed resource allocation for wireless powered OFDMA multi-cell networks

2017

In this paper, we investigate the energy efficient resource allocation problem for the wireless powered OFDMA multi-cell networks. In the considered system, the users who have data to transmit in the uplink can only be empowered by the wireless power obtained from multiple base stations (BSs) with a large scale of multiple antennas in the downlink. A time division protocol is considered to divide the time of wireless power transfer (WPT) in the downlink and wireless information transfer (WIT) in the uplink into separate time slot. With the objective to improve the energy efficiency (EE) of the system, we propose the antenna selection, time allocation, subcarrier and power allocation schemes…

PHY and MAC layer performance optimization of the IEEE 802.16 system

2012

Energy efficient optimisation for large-scale multiple-antenna system with WPT

2018

In this study, an energy-efficient optimisation scheme for a large-scale multiple-antenna system with wireless power transfer (WPT) is presented. In the considered system, the user is charged by a base station with a large number of antennas via downlink WPT and then utilises the received power to carry out uplink data transmission. Novel antenna selection, time allocation and power allocation schemes are presented to optimise the energy efficiency of the overall system. In addition, the authors also consider channel state information cannot be perfectly obtained when designing the resource allocation schemes. The non-linear fractional programming-based algorithm is utilised to address the …

Studies on high speed uplink packet access performance enhancements

2014

Analysis and performance of FBMC techniques with application to relay networks

2014

An Efficient and Privacy-Preserving Blockchain-Based Authentication Scheme for Low Earth Orbit Satellite Assisted Internet of Things

2022

Recently, integrating satellite networks (e.g. Low-earth-orbit satellite constellation) into the Internet of Things (IoT) ecosystem has emerged as a potential paradigm to provide more reliable, ubiquitous and seamless network services. The LEO satellite networks serves as a key enabler to transform the connectivity across industries and geographical border. Despite the convenience brought from the LEO satellite networks, it arises security concerns, in which the essential one is to secure the communication between the IoT devices and the LEO satellite network. However, some challenges inheriting from the LEO satellite networks need to be considered : 1) the dynamic topology; 2) the resource…

A comparison of the impacts of introduced signal crayfish and native noble crayfish in boreal lake ecosystems

2014

Design and evaluation of self-healing solutions for future wireless networks

2016

This doctoral dissertation is aimed at the creation of comprehensive and innovative Self-Organizing Networks (SON) solutions for the Network Management of future wireless networks. More specifically, the thesis focuses on the Self-Healing (SH) part of SON. Faults can appear at several functional areas of a complex cellular network. However, the most critical domain from a fault management viewpoint is the Radio Access Network (RAN). The fault management of network elements is not only difficult but also imposes high costs both in capital investment (CAPEX) and operational expenditures (OPEX). The SON concept has emerged with the goal to foster automation and to reduce human involvement in man…

Ei-yhteistoiminnallisten pelien sovelluksia langattomissa verkoissa

2011

Laitinen, Jouni Ei-yhteistoiminnallisten pelien sovelluksia langattomissa verkoissa Jyväskylä: Jyväskylän yliopisto, 2011, 36 s. Tietojenkäsittelytiede, kandidaatin tutkielma Ohjaaja: Hirvonen, Pertti Peliteorian suosio on viime vuosina kasvanut uusien sovellusten myös. Näihin sovelluksiin kuuluu myös langattomat tietoverkot ja niissä tapahtuvat kanssakäynnit. Peliteorian avulla näitä tapahtumia voidaan analysoida tarkemmin ja niiden tehokkuutta nostaa. Tässä kirjallisuuteen pohjautuvassa kandidaatin tutkielmassa esitellään ensin peliteorian perusteita, joita sitten sovelletaan langattomien tietoverkkojen eri ongelmiin. Näitä ongelmia ovat: lähetystehon määrittäminen, taajuuden vaihtaminen …