Yoon-chae Cheong_Cognitive Radio and Future Network.pdf ...

Spectrum ScarcityTotal amount of required spectrum is expected up to 1280~1720MHz by 2020For mobile communications, preferred spectrum is mostly under 2GHz.< 1 GHz850 MHz ”Cellular”Americas410 MHz450 MHz”BC UHF”900 MHzIMTAfrica, Asia-Pacific,Europe, Middle EastALLOCATEDIDENTIFIED< 3 GHzAmericasAWS PCS 1900 AWS1800 MHz ”Core” 2 GHz2.3 GHzISM 2.45 GHz”Extension”2.5 GHz2.7 GHzAfrica, Asia-PacificEurope, Middle East< 5 GHz3400 MHz 3600 MHz 3800 MHz 4000 MHz 4200 MHz 4400 MHz 4500 MHz 4800 MHz 4990 MHz- 8 -

Spectrum UnderutilizedMost spectrum between 30MHz and 3 GHz is generally under utilizedRarely used in some bands and/or areasPortion of commercial use is relatively lowAverage : 5.2%Average in New York city : 13.1%Spectrum Allocations (300MHz ~ 3GHz, FCC)- 9 -

Cognitive RadioDefinitionRadio in which communication systems are aware of theirspace/time/frequency environment and can make intelligent decisionsabout their radio operating behavior like frequency, modulation, andtransmission power based on that information- 10 -

Cognitive Radio ScenariosP2PConnectionNetworkConnectionCRDeviceLicensedAccessOpenAccessLicensedAccessOpenAccessOpenAccessSensingDynamic FrequencyDynamic BandwidthSensingLicensedAccessFixed Frequency DynamicFixed Bandwidth Dynamic- 11 -

Cognitive Radio TechnologiesSpectrum Cognitive Tech.- 12 -

Future NetworksCellular Network changing from voice network to data networkDisruptive changes in capacity and coverage are requiredProliferation of services into other areas such as education, health,community, military, industry, etc.New types of networks are expected to emergeEconomicsData-centricManageabilityScalabilityUbiquitySecurity/RobustnessFutureNetworkContextawarenessReconfigurabilityMobilityHeterogeneityQuality ofService- 13 -

Future Network ScenariosInternetCellular NetworkEnhanced Cellular NetworkPersonalHomeCommunityPANVehicularVAN- 14 -

Technologies for Future NetworkNew Radio Technology Advanced antenna signal processing for more capacity Distributed radio access architecture for extended data coverage Ad-hoc based P2P wireless access Sensor based system with radio access to the greater networks Radio based wireless security and location awarenessRevolutionary Networking Technology Enhanced security and management features Seamless interconnection of heterogeneous networks Object identity embracing sensor networks QoS guaranteed routing architecture Service oriented flexible architecture- 15 -

Future Network Research ActivitiesFGI: Future Generation InternetFIND: Future Internet DesignGENI: Global Environment for Network InnovationsJGNII: Japan Gigabit Network II- 16 -