Fostering worldwide interoperabilityGeneva, 13-16 July 2009

Cognitive radio networksfor future open communciation

Homare Murakami, Hiroshi HaradaNICT / ARIB

Global Standards Collaboration (GSC) 14

DOCUMENT #: GSC14-GRSC7-023

FOR: Presentation

SOURCE: ARIB

AGENDA ITEM: 4.3

CONTACT(S): homa@nict.go.jp

Fostering worldwide interoperability

Backgrounds- Current trends & concerns -

New Wireless systems are/will be availableHSPA, 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.

2Geneva, 13-16 July 2009

Fostering worldwide interoperability 3Geneva, 13-16 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 operatedRadio 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 ASystem A System BSystem B System CSystem C

Freq.Freq.

White-space type dynamic spectrum access (cognitive radio)

System ASystem A System BSystem B System CSystem C

Freq.Freq.

Sense vacant frequency band and period

Sense existing communication systems

Heterogeneous type dynamic spectrum access (cognitive radio)

Fostering worldwide interoperability

Cognitive Wireless networksA 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 RATsUsers can gain desirable throughput via appropriate BSs and APsOperators are capable of improving spectrum usage efficiency by recommending a suitable RAT to attach for users

4Geneva, 13-16 July 2009

802.11nWiMAX

LTE

TRMTRM

RANs

NRM

RMC

NRM

NRM

NRM

TRMTRM

RMC

Terminals

NRM Cloud

The Internet

Carrier 3

Home/Office Network

Carrier 1 Carrier 2

Cognitive Spectrum Accessin Multi Operators

Cognitive Spectrum Accesssuitable for Fast Mobility

Fostering worldwide interoperability

Challenges - Cognitive radio devices and equipments -

5Geneva, 13-16 July 2009

Multi-band tunableWide-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

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

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

RF unitSignal 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 802.11b/g on board chipcontrollable 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 technologyShow available and connectable communication systems

Fostering worldwide interoperability 6Geneva, 13-16 July 2009

Next Steps/Actions (1/2)- Dynamic spectrum access network -

BS1

BS3AP3

BS4AP4

AP2

BS5

BS2

AP5BS6

AP6

Sensing

Primary operator 1

Secondary operator 3 Secondary operator 4 Secondary 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 -

7Geneva, 13-16 July 2009

United States Europe

Japan

ITU-RWP1B, 5A IST FP7

•E3•Oracle•Sendra

IEICE TCSR

IEEE 802802.21,802.22

IEEE SCC411900.1,2,3,4

MIC dynamic spectrum access project

SDR Forum

DARPA XG

CWC(NICT)

ETSI RRS

Standardization body

Promotion group

R&D Project