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Cognitive radio networks for future open communciation

Global Standards Collaboration (GSC) 14. Cognitive radio networks for future open communciation. Homare Murakami, Hiroshi Harada NICT / ARIB. Backgrounds - Current trends & concerns -. New Wireless systems are/will be available HSPA, LTE, 802.16e, 802.11n, 802.15.3c, UWB, Zigbee, …

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Cognitive radio networks for future open communciation

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  1. Global Standards Collaboration (GSC) 14 Cognitive radio networksfor future open communciation Homare Murakami, Hiroshi Harada NICT / ARIB

  2. Backgrounds- Current trends & concerns - • New Wireless systems are/will be available • HSPA, LTE, 802.16e, 802.11n, 802.15.3c, 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.

  3. Dynamic Spectrum Access (DSA) - Two approaches to utilize cognitive radio technology- White-space type dynamic spectrum access (cognitive radio) Sense vacant frequency band and period System A System C System B Freq. Heterogeneous type dynamic spectrum access (cognitive radio) Sense existing communication systems System A System C System B Freq. • 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

  4. Cognitive Wireless networks NRM Cloud NRM NRM The Internet 802.11n WiMAX LTE NRM RMC NRM RMC RANs TRM TRM TRM TRM Terminals • 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

  5. Challenges -Cognitive radio devices and equipments - • Cognitive base station prototype • TRM is implemented inside • Sensing capability • RSSI sensing (PHY level) • 400MHz-6GHz • System (RAT) detection • 802.11b MAC • Reconfiguration capability • Tunable to vacant band • with 802.11b MAC Signal processing unit (FPGA base) Signal processing unit (CPU base) RF unit • Cognitive mobile router prototype • TRM is implemented inside • WAN (Internet) access • via HSDPA USB commercial card • via PHS PCMCIA commercial card • via 802.11b/g on board chip • controllable by NRM • LAN access • via 802.11 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 • Multi-band tunableWide-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 • Multi-band tunable • Wide-range amplifier • 0.4-6.2GHz (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

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

  7. Next Steps/Actions (2/2)- Harmonization of standardization activities - Europe United States ITU-R WP1B, 5A • IST FP7 • E3 • Oracle • Sendra DARPA XG IEEE802 802.21,802.22 SDR Forum IEEESCC41 1900.1,2,3,4 ETSI RRS IEICETCSR MIC dynamic spectrum access project Standardization body CWC(NICT) Promotion group Japan R&D Project

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