Theco-frequencymixedcoveragemethodforgreenwirelessnetworksJinkangZhuPCN&SSLab.ofUSTCUniversityofScience&TechofChina(USTC)2012,9,171Content1.Fundamentofsavingenergy2.Areaspectral&energyefficiency3.Twocoveragemethodsofwireless4.Co-frequencymixedcoverage&property5.Conclusion中国科学技术大学个人通信与扩频实验室21.FundamentofsavingenergyEvolution:ShannonformulaCapacity-PowerformulaCBPNlog(1)2rTherelationshipofSNIRandCh2GPrPhrrS(r2)0r4rPCBlog1h0r2S(r)(NIrN0)2TherelationshipofP0,S(r)andC中国科学技术大学个人通信与扩频实验室3Capacity-PowerformulaPClog1h0Br2S(r)(NIrN0)C/B↑S(r2)↓:r↓orNarrowbeamantenna↓NIr↓:Interferencefromadjacentcell↓中国科学技术大学个人通信与扩频实验室4Definition:EnergyefficiencyfunctionSpectralefficiencyachievedQPowerconsumptionhlog1rPC/BS(r2)N0QP0P0bps/Hz/W中国科学技术大学个人通信与扩频实验室52.Areaspectral&energyefficiencyStudytheareaspectral&energyofcellularnetworksusingthefundamentofsavingenergy.CellularnetworkstructureCo-frequency,Seamlesscoverage,powercontrolKeyissueisinterference&mobileoverhead.R2R1R中国科学技术大学个人通信与扩频实验室6InterferenceanalysisAnalysismodelCellinterferencedepth(CID)CIDisratioofthedisturbedareatotheresidentialarea.rJrr-JrIrSJSrr2rJ2rJr1(r)2r2r中国科学技术大学个人通信与扩频实验室7HandoffimpactanalysisAnalysismodelHandoffdynamicmodel(HDM)HDMisratiooftheleastoccupiedcapacityreservedforhandoffinuser‘smovingradiusDtochannelcapacity.MobileLHminDqminUser1spaceLrBS1User2BS2MobileMobile1q1DspaceUsermspacemaxminr(Dr/π)中国科学技术大学个人通信与扩频实验室8AreaspectralefficiencyMDefinition:Cm/Bm1AreaspectralefficiencyMMλ2GMλ2GC/B(σπD/r)log(m)P(1)log(m)PmIr(m)220(m)Ir220(m)m1m14πA(r(m))(NIr(m)N0(m))m14πA(r(m))N0(m)IfσIr>q=πD／rMMλ2GC/B(1πD/r)log(m)Pm(m)220(m)m1m14πA(r(m))N0(m)IfσIr<q=πD／rAmountofinformationofagivennetwork中国科学技术大学个人通信与扩频实验室9AreaenergyefficiencyfunctionMCm/Bm1Definition:QM