| Summary: | 碩士 === 元智大學 === 通訊工程學系 === 103 === In recent years,as smart phone、tablet have been getting popularity,this is the reason why the extensive deployment of mobile communication infrastructure is gradually increase.As energy crisis,global warming and carbon emissions became important issue,the power saving of the mobile communication infrastructure draws more and more attention recently.So,how to decrease the power saving of base station became one of the important issue now.
In this paper,we investigate the power saving in a two-tier heterogeneous cellular network.Consider a system which consists of one macrocell and 20 femtocells,and
randomly generated 10、20、30 users in this system.In this system,user is according to his/her location to choose which base station of macrocell or one of the adjacent femtocell to connect.If the base station no traffic and users connect in a time,this base station will enter the sleep mode to decrease the power consumption.This paper we investigate the power saving probability of base station enter the sleep mode.Power
saving probability is affected by lots of various factors.Moreover,power saving probability will decide the total power consumption of this system.Therefore,use an efficient approach to assessment power saving is a very important job.
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