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Cooperative Device-to-Device (D2D) communications as an underlay of future mobile networks

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.advisor Dowhuszko, Alexis
dc.contributor.author Liu, Zijia
dc.date.accessioned 2014-04-17T09:09:43Z
dc.date.available 2014-04-17T09:09:43Z
dc.date.issued 2014-03-31
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/12896
dc.description.abstract Recently, the demand of people on mobile data has been growing constantly and rapidly. 3GPP has proposed an approach to involve Device-to-Device (D2D) communications as an underlay of future mobile networks. Nevertheless, in order to guarantee Quality of Service (QoS), as well as to provide higher data rates to meet the future throughput demands of users, a new enhancement is presented in this Thesis that is known as cooperative D2D communications. The goal of this Thesis is to evaluate the performance of cooperative D2D communications in different scenarios. In addition, we aim to identify the most convenient scenario for cooperative D2D communications, considering a reasonable tradeoff between the cost and the benefit of its implementation in practice. The approach that we consider is based on carrying out a system level simulation, where a cluster of Relaying Nodes (RNs) is used, to assist data transmissions from a main Transmitter (Tx) User Equipment (UE) to a main Receiver (Rx) UE. The relaying cluster can then select the most convenient transmit beamforming weighting factor with the aid of a limited channel feedback scheme. The outage probability for a given target End-to-End (E2E) spectral efficiency is used as performance measure. The analyses that were considered reveal that the use cooperative D2D communications have the potential to obtain a better performance than to use direct D2D communications. In addition, the effect of different parameters of the simulation scenario, like the distance between the main Tx and the main Rx, the total number of nodes in the area, the number of active RNs in the cluster, and the amount of feedback information in the second hop, have also been considered. en
dc.format.extent 68+13
dc.language.iso en en
dc.title Cooperative Device-to-Device (D2D) communications as an underlay of future mobile networks en
dc.type G2 Pro gradu, diplomityö en
dc.contributor.school Sähkötekniikan korkeakoulu fi
dc.subject.keyword cooperative communications en
dc.subject.keyword device-to-device(D2D) en
dc.subject.keyword future mobile networks en
dc.subject.keyword relaying nodes en
dc.subject.keyword end-to-end spectral efficiency improvement en
dc.identifier.urn URN:NBN:fi:aalto-201404171698
dc.programme.major Radio Communications fi
dc.programme.mcode S3019 fi
dc.type.ontasot Diplomityö fi
dc.type.ontasot Master's thesis en
dc.contributor.supervisor Hämäläinen, Jyri
dc.programme TLT - Master’s Programme in Communications Engineering fi
dc.location P1 fi
local.aalto.openaccess no
local.aalto.digifolder Aalto_90905
dc.rights.accesslevel closedAccess
local.aalto.idinssi 48910
dc.type.publication masterThesis
dc.type.okm G2 Pro gradu, diplomityö

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