Search results for "tietoliikenne"
showing 10 items of 49 documents
Multi-Resource Management for Multi-Tier Space Information Networks: A Cooperative Game
2019
With the drastic increase of space information network (SIN) traffic and the diversity of network traffic types, the optimal allocation of the scarce network resources is of great significance for optimizing the SIN system capability. In this paper, we propose a multi-resource management method for multi-tier SIN using the cooperative Nash bargaining solution. Since the original problem is a non-convex problem, we firstly make logarithmic transition, and then find a tightest lower bound function to convert the initial problem into a convex one. In order to carry out the optimal bandwidth and power allocation in SIN, we construct a joint bandwidth and power allocation (JBPA) algorithm. Simul…
OBEX- tai WAP-protokollan käyttö Bluetooth-ohjatussa robotissa
2006
Teleasentajien viime vuosikymmenet : haastattelututkimus teleasentajien kokemuksista työnsä muuttumisesta 1970-2010-lukujen aikana
2016
Tutkimukseni käsittelee teleasentajien työn muutosta ja heidän kokemuksiaan siitä noin vuosiluvuilta 1970-2010. Telealan kehitys on ollut nopeatempoista, joten miten alalla pitkän työuran tehneet henkilöt ovat pysyneet mukana? Kuinka heidän työnsä ja työelämänsä ovat muuttuneet aikajakson aikana, mitä he ovat kokeneet muutosten aikana, ja miten he suhtautuvat näihin muutoksiin? Millä tavalla teleasentajan työ 2010-luvulla eroaa 1970-luvun työstä? Tutkielma on jatkoa tekijän kandidaatintutkielmalle. Tutkimus on toteutettu haastattelemalla seitsemää 45-85-vuotiasta miestä, jotka ovat työskennelleet telealalla yli 30 vuoden ajan. Heistä suurin osa on aloittanut työuransa 1970-luvulla. Haastate…
Evaluation of Internet channels and their impacts on Irish mobile operators' business models
2013
Ademowo, Adewale Adebayo Evaluation of Internet Channels and their impacts on Irish Mobile Operators' Business Models Jyväskylä: University of Jyväskylä, 2013, 108 p. Mobile Technology and Business (Major in Information Systems Science), Master's Thesis Supervisor: Luoma, Eetu This study finds the impacts of the Internet channels on mobile operators’ business models with Ireland as a case. It reflects on the business model concepts, business models of mobile telecom industry and specifically Irish mobile operators; and evaluates and highlights the impacts of the internet channels used by the operators. This study uses exploratory case study as a methodology and qualitative method as an appr…
Multi-Connectivity in 5G and Beyond Non-Terrestrial Networks
2022
The Fifth Generation (5G) communications systems aim to serve such service classes as Ultra-Reliable Low Latency Communications (URLLC), enhanced Mobile Broadband (eMBB), and massive Machine-Type Communications (mMTC). To meet the growing requirements posed to mobile networks, satellites can be used to complement the Terrestrial Networks (TNs). To increase the efficiency of the satellite communications involved, bandwidth-efficient techniques should be used. Multi- Connectivity (MC) is one such technique. In MC, a User Equipment (UE), for example, a smartphone, can be connected to multiple Next Generation Node Bs (gNBs) simultaneously. In this paper, an adaptive MC activation scheme for thr…
Performance enhancements of MBMS and VoIP services in WCDMA/HSPA networks
2009
Performance evaluation of OpenFlow enabled Commodity and Raspberry-pi Wireless Routers
2017
Software defined network (SDN) allows the decoupling of data and control plane for dynamic and scalable network management. SDN is usually associated with OpenFlow protocol which is a standard interface that enables the network controllers to determine the path of network packets across a network of switches. In this paper, we evaluate openflow performance using commodity wireless router and raspberry pi with two different SDN controllers. Our test setup consists of wired and wireless client devices connected to openflow enabled commodity wireless router and raspberry pi. All clients used traffic generator tool to transmits data to a sink server host. The results are promising and paves the…
Elaboration of NMT and GSM standards : from idea to market
2002
The focus of this study is on elaboration of NMT (Nordic Mobile Telephone) and GSM (Global System for Mobile communications) standards. It seeks to understand the standard-making process from a system's philosophy to market entry.The specific objectives of the study are 1) to reconstruct the original ideas of innovation, 2) to reconstruct standardization processes of NMT and GSM systems, 3) to reconstruct interplay and impact of key players during standardization process, and 4) to explain success of NMT and GSM standards. Analyzing processes of two successful mobile communication standard-making aims to reveal what were the specific Nordic standardization practices and principles, and what…