13357

12170

كارشناسي ارشد

مخابرات سيستم

اصفهان: دانشگاه صنعتي اصفهان، دانشكده برق و كامپيوتر

۱۳۹۶

دوازده، ۸۰ص.: مصور، جدول، نمودار

محمدجواد اميدي

علي محمد دوست حسيني

محمدصادق فاضل، مهدي مهدوي

1396/12/19

كتابنامه

برق و كامپيوتر

مهندسي برق و كامپيوتر

ID12170

Handover Management in Cellular Heterogeneous Networks Pooria Seyed Eftetahi Date of Submission January 8 2018 Department of Electrical and Computer Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language FarsiSupervisor Dr Mohammad Javad Omidi Advisor Dr Ali Mohamad Doost HoseiniAbstractWith the advancement of telecommunication systems in recent years demand for higher data rateshas been rising One of the proposed key solutions to meet this demand is the use of Heteroge neous Networks HetNets in other words the use of small cells including microcells picocellsand femtosecells along with the conventional macrocells One of the main challenges in HetNets isthe energy consumption during network s lower load situations and there are several techniques toreduce it One of these techniques is to balance the load of base stations by defining a sleep stateamong them One of the proposed approaches to achieve this purpose is to model it with a non cooperative game that is explored in this thesis Another major challenge is to manage the mobilityand Handover of users in such networks Due to the limited power of small base stations suchas microcells Handover in HetNets unlike traditional networks is not just based on power as otherelements are involved In addition in such networks the handover is not just to keep the user in con tact but also to maintain load balancing and reduce energy consumption Therefore the handoveris very significant In this thesis the sleep based HetNets are surveyed and a handover algorithm for such networksis provided In the proposed algorithm the parameters of received power along with the base sta tion load and users velocities have been used in the handover process and effort has been madeto reduce number of additional handovers by using the users velocities and encouraging the userswith high velocities to connect to macro base station Also it has been tried to keep the load balancebetween base stations and prevent overloading Finally the aforementioned algorithm has been sim ulated The simulation results indicate reduction in the number of handover in presented algorithmcompared to the conventional algorithms and algorithms in which velocity is not considered Theproposed algorithm also results in reduction in base stations power consumption and has higherthroughput compared to similar algorithms presented in papers Keywords Heterogeneous Networks Game Theory Microcell Handover

محمدجواد اميدي

علي محمد دوست حسيني

محمدصادق فاضل، مهدي مهدوي