15962

14255

كارشناسي ارشد

مخابرات سيستم

اصفهان : دانشگاه صنعتي اصفهان

1399

پانزده، 74ص، جدول، نمودار

فروغ السادات طباطبا، محمد صادق فاضل

محمدحسين منشئي، محمدرضا حيدرپور

1399/08/14

كتابنامه

برق

مهندسي برق و كامپيوتر

1399/08/14

2648153

Fairness Establishment for D2D Communication in Cellular Networks with Energy Harvesting Capability Kamran Kiani k kiani@ec iut ac ir Summer 2020 Department of Electrical and Computer Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language Farsi Supervisors Assist Prof Foroogh S Tabataba fstabataba@iut ac ir Assist Prof Mohammad Sadegh Fazel fazel@iut ac ir Abstract In today s world the speed of developments in different fields of science and technology has become much higher thanbefore The communications technology will also be transformed due to the increase in the number of mobile devices expansion of the Internet of Things IoT and also higher required user throughput As a result using current conventionalmethods for coverage of different users in network especially in crowded places are problematic Therefore we need touse various and new methods to increase the coverage area throughput energy efficiency and reduce the delay of the users One of these methods is device to device or D2D communication which allows two closely devices to communicate directlywithout requiring the intervention of base station In order to transmit the message D2D users can also benefit from theirco existence with cellular users and for this purpose maintaining the quality of service for cellular users is important Considering the facts that D2D communication is usually done between two devices with short distance and replacingthe batteries is costly energy harvesting EH is a promising way that can be used to feed these devices EH is a method inwhich users can use the energy harvester circuit to mainly harvest energy from ambient sources like the interference of theother users and from dedicated sources like base station In this study a cellular network is considered where D2D communication simultaneously takes place by sharing thespectral resources of the cellular users in underlay mode and with the help of energy harvesting Hence there are one basestation some cellular users and D2D pairs where the transmitter of D2D users is capable to harvest energy Furthermore in this system model two timing scenarios are considered for users data transmission namely co existence and hybrid Ourgoal is to maximize the minimum of D2D users throughput considering variables like the transmit beamforming vector atthe base station time allocation of users and energy expenditure of D2D users This problem is solved using semi definiterelaxation SDR method Finally we compare two proposed scenarios with each other and evaluate their performance innumerical results considering different parameters like number of antennas in base station minimum threshold of cellularuser s throughput and D2D pair distance in macrocell and femtocell networks the results shows that it is possible to haveco existence of D2D and cellular users in network and also the hybrid scenario has better performance from minimumthroughput point of view Key Words D2D Communication Energy Harvesting Fairness Beamforming Resource Alloca tion

فروغ السادات طباطبا، محمد صادق فاضل

محمدحسين منشئي، محمدرضا حيدرپور