Fostering worldwide interoperabilityGeneva, July 2009 Cognitive radio networks for future open communciation Homare Murakami, Hiroshi Harada NICT / ARIB Global Standards Collaboration (GSC) 14 DOCUMENT #:GSC14-GRSC7-023 FOR:Presentation SOURCE:ARIB AGENDA ITEM:4.3

Fostering worldwide interoperability Backgrounds - Current trends & concerns - New Wireless systems are/will be available HSPA, LTE, e, n, c, UWB, Zigbee, … Different characteristics and target use cases Coexistence Broadband systems need more bandwidth… How to assign frequency band for new standardized wireless communication systems? How to extend the coverage area? How to increase the capacity for users? A flexible method to utilize and to manage spectrum is required to be studied. 2 Geneva, July 2009

Fostering worldwide interoperability 3 Geneva, July 2009 Dynamic Spectrum Access (DSA) - Two approaches to utilize cognitive radio technology- Radio equipments sense its operational environment. As for sensing methods, two possibilities are envisaged Radio equipment senses vacant frequency band and period where no other communication systems are operated Radio equipment senses existing communication systems and checks its connectivity By sharing the sensing results between NWs and Terminals, radio equipments finally decides frequency band and communication systems to be used System A System B System C Freq. White-space type dynamic spectrum access (cognitive radio) System A System B System C Freq. Sense vacant frequency band and period Sense existing communication systems Heterogeneous type dynamic spectrum access (cognitive radio)

Fostering worldwide interoperability Cognitive Wireless networks A cognitive wireless network that decides optimal radio access networks (or operators) and radio access technologies based on collaboration between Network Reconfiguration Managers (NRMs) and Terminal Reconfiguration Managers (TRMs) via Cross-network (or common) signaling. Link aggregation utilizing multiple RATs Users can gain desirable throughput via appropriate BSs and APs Operators are capable of improving spectrum usage efficiency by recommending a suitable RAT to attach for users 4 Geneva, July n WiMAX LTE TRM RANs NRM RMC NRM TRM RMC Terminals NRM Cloud The Internet

Fostering worldwide interoperability Challenges - Cognitive radio devices and equipments - 5 Geneva, July 2009 Multi-band tunable Wide-range amplifier  GHz (2 mode)  Gain: 30dB  Output: 24dBm  NF: more than 5dB Multi-band mixer  0.4-6GHz,  90nm RF-CMOS  3.3 V  Multiband synthesizer  50mm * 40mm Multi-band tunable Wide-range RF filter  Mode 1: 0.4 ～ 0.8 GHz  Mode 2: 0.8 ～ 1.3 GHz  Mode3:1.3 ～ 2.1 GHz  Mode 4: 2.1 ～ 3.0 GHz  Mode 5: 3.0 ～ 4.0 GHz  Mode 6: 4.4 ～ 6.0 GHz Cognitive base station prototype  TRM is implemented inside  Sensing capability  RSSI sensing ( PHY level)  400MHz-6GHz  System (RAT) detection  b MAC  Reconfiguration capability  Tunable to vacant band  with b MAC RF unit Signal processing unit (FPGA base) Signal processing unit (CPU base) Cognitive mobile router prototype  TRM is implemented inside  WAN (Internet) access  via HSDPA USB commercial card  via PHS PCMCIA commercial card  via b/g on board chip  controllable by NRM  LAN access  via b/g on board chip Software-Defined Cognitive terminal prototype  TRM is implemented inside  Sense spectrum over UHF to 6GHz band and show spectrum usage  Indentify communication systems in selected frequency band by using SDR technology  Show available and connectable communication systems

Fostering worldwide interoperability 6 Geneva, July 2009 Next Steps/Actions (1/2) - Dynamic spectrum access network - BS1 BS3 AP3 BS4 AP4 AP2 BS5 BS2 AP5 BS6 AP6 Sensing Primary operator 1 Secondary operator 3Secondary operator 4Secondary operator 5 Secondary operator 6 Primary operator 2 Independent network Sensing AP1 Secondary operators use frequency band and period that primary operator does not use by sensing spectrum and link quality. Single/multiple primary operators and multiple secondary operators managed dynamic spectrum access network : CNM/NRM (management & control): sensing info.: signaling

Fostering worldwide interoperability Next Steps/Actions (2/2) - Harmonization of standardization activities - 7 Geneva, July 2009 United States Europe Japan ITU-R WP1B, 5A IST FP7 E3 Oracle Sendra IEICE TCSR IEEE , IEEE SCC ,2,3,4 MIC dynamic spectrum access project SDR Forum DARPA XG CWC(NICT) ETSI RRS Standardization body Promotion group R&D Project