?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=Performance+Analysis+and+Optimization+of+Cache-Enabled+Small+Cell+Networks&rft.creator=Zhu%2C+Y&rft.creator=Zheng%2C+G&rft.creator=Wang%2C+L&rft.creator=Wong%2C+K-K&rft.creator=Zhao%2C+L&rft.description=This+paper+studies+the+performance+of+cache-enabled+dense+small+cell+networks+consisting+of+multi-+antenna+sub-6+GHz+and+millimeter-wave+base+stations.+We+first+derive+the+successful+content+delivery+probability+by+accounting+for+the+key+channel+features+at+sub-6+GHz+and+mmWave+frequencies.+In+general%2C+the+optimal+content+placement+is+unknown+when+the+base+stations+have+multiple+antennas.+Then+we+propose+a+simple+yet+effective+probabilistic+content+placement+scheme+to+maximize+the+successful+content+delivery+probability%2C+which+could+balance+caching+both+the+most+popular+contents+and+achieving+content+diversity.+Numerical+results+demonstrate+that+our+proposed+content+placement+scheme+yields+significantly+better+performance+than+only+caching+the+most+popular+contents.+The+comparisons+between+the+sub-6+GHz+and+millimeter-wave+systems+reveal+an+interesting+tradeoff+between+caching+capacity+and+base+station+density+for+the+millimeter-wave+system+to+achieve+similar+performance+as+the+sub-6+GHz+system.&rft.publisher=IEEE&rft.contributor=Kwong%2C+D-L&rft.contributor=Lee%2C+SL&rft.contributor=Mok%2C+PL&rft.contributor=Wong%2C+L&rft.contributor=Liang%2C+Y-C&rft.contributor=Sun%2C+S&rft.date=2018-01-15&rft.type=Proceedings+paper&rft.publisher=IEEE+Global+Communications+Conference+(GLOBECOM)&rft.language=eng&rft.source=+++++In%3A+Kwong%2C+D-L+and+Lee%2C+SL+and+Mok%2C+PL+and+Wong%2C+L+and+Liang%2C+Y-C+and+Sun%2C+S%2C+(eds.)+GLOBECOM+2017+-+2017+IEEE+Global+Communications+Conference.++++IEEE+(2018)+++++&rft.format=text&rft.identifier=https%3A%2F%2Fdiscovery.ucl.ac.uk%2Fid%2Feprint%2F10047810%2F1%2F08254810.pdf&rft.identifier=https%3A%2F%2Fdiscovery.ucl.ac.uk%2Fid%2Feprint%2F10047810%2F&rft.rights=open