adapt4 cognitive radio presentation

Adapt4March 21, 2006 1

Cognitive RadioCognitive RadioPublic Safety Overlay Network Public Safety Overlay Network CConceptoncept

March 2006

NPSTC Technology Committee MeetingNPSTC Technology Committee Meeting


About Adapt4● Wholly-owned subsidiary of Data Flow

Systems, Inc (DFS)– DFS is one of the largest Water-SCADA system suppliers

in the SE US (>9,000 sites installed)

– All systems use wireless links

– Spectrum scarcity presented serious growth limitations

● Formed in Jan 2003 and headquartered in Melbourne, Fl

● Focused on the development of the first, commercial Cognitive Radio


Adapt4’s Goal

● Develop Cognitive Radio technology which is so effective it can harvest more bandwidth in highly desired bands than is currently in use today!– More than in use by cellular systems– More than in use by unlicensed bands– More than in use by private mobile systems

● This represents a paradigm shift in technology!


What is a Cognitive Radio?

● Intelligent radio that uses spectrum licensed to other users when they aren't using it– ‘Bandwidth Harvesting’

● It is a software-designed radio with cognitivesoftware


Benefits of Cognitive Technology

● Creates a new class of users that intelligently share spectrum when it is idle – very significant benefit

“If you look at the entire RF frequency up to 100 GHz, and take a snapshot at any given time, you’ll see that only 5 to 10 percent of it is being used. So there’s 90 GHz of available bandwidth.”

Ed Thomas, Former Chief Engineer at the FCC


ADAPT4ADAPT4’’S S –– BAND INDEPENDENT TECHNOLOGYSBAND INDEPENDENT TECHNOLOGYS

SPECTRAL REUSE TRANSCEIVER SPECTRAL REUSE TRANSCEIVER ™™ (SRT)(SRT)(Patent Pending)(Patent Pending)

SPECTRAL AGGREGATION TECHNOLOGYSPECTRAL AGGREGATION TECHNOLOGY(Patent Pending)(Patent Pending)


Adapt4's Clear Channel Assessment (CCA)

● Each Radio reports observed interference to the Hub

● The Hub combines the data into a network-wide view and distributes it to all Radios, instantly producing an interference-free hopping sequence.

The XG1 radios operate in unison; the network is cognitive, to eliminate interference.

Clear ChannelAssessment (CCA)


CR Technology Challenges

● Detecting an empty slot● Jumping out quickly● Silent Receiver● Hidden Transmitter

Adapt4 technology addresses all of these problems!


Adapt4's Solution● Adapt4’s technology addresses all of the problems associated with

secondary use!– High-speed frequency hopping of low power OFDM carriers– Coordinated ‘clear channel assessment’ (CCA)– Computed Interference Avoidance (CIA)– Intentional 'Notching' of specific channels– Undetectable by most other radios

● This allows us to use VHF and UHF bands which currently support the Private Land Mobile Radios (PLMR) – PTT radios

● This ‘double-spreading’ technique and network-wide CCA eliminates interference to PUs


How it works! -- Step 1

Monitor the spectrum and 'profile use'



sd

Generate 'network-wide view' of user profile

Available Available AvailableAvailable



Create a 'hopping sequence' that minimizes dwell time



Distribute hopping sequence and start transmitting

Hop Seq.


XG1- Demonstration

●● Operates in the 217 Operates in the 217 –– 220 MHz band220 MHz band–– Easily adaptable to other bandsEasily adaptable to other bands

●● Fixed & MobileFixed & Mobile●● Requires a Requires a ‘‘secondary usesecondary use’’ licenselicense

–– Unless your are the primary user Unless your are the primary user

●● Supports data rates from 4.8 kb/s to Supports data rates from 4.8 kb/s to 150 kb/s150 kb/s–– Up to Up to 400 kb/s with XG3400 kb/s with XG3

●● Ethernet and serial user interfacesEthernet and serial user interfaces


Adapt4 Cognitive Radio Demo Block Diagram

VHF Voice RadiosVHF Voice RadiosPrimary Licensed Primary Licensed

UserUser

218.750 MHz

Other UsersOther Users(Portable)(Portable)

218.100,218.100,

218.600 218.600 Spectrum Spectrum AnalyzerAnalyzer

Spectrum AnalyzerSpectrum AnalyzerVideo ImageVideo Image Radio NMS SWRadio NMS SW


NPSTC Proposal Summary● Adapt4 Cognitive Radios can very effectively harvest

contiguous and non-contiguous channels on a non-interfering basis to provide PS up to 400kbs throughput for data. (example: 450 – 470MHz)

● All or some Public Safety agencies could pool (share) their unused/underutilized capacity with cooperating agencies to achieve Interoperability for Data.

● The network could prioritize access based on real-time conditions

●● Public Safety Overlay Network (PSON)Public Safety Overlay Network (PSON)


PPublic SSafety OOverlay NNetwork - Advantages

● Its an overlay network so existing radios can continue to be used and the CR-enabled radios can provide enhanced services on additional bandwidth to those with real needs – No need to replace the old radios to have high speed data!

● Access to state-of-the-art digital radios which can offer enhanced services (Data, Video, Voice)

● High-speed Internet Access anywhere in the PSON● Increased capacity during emergencies● Inter-agency voice interoperability can be provided via

the PSON (Vo/IP) – Shared access to Host Servers


How it Works!

● Each PSON has a central NMS which would be controlled by an appointed Coordinator (like APCO)

● Each CR has an Electronic Serial Number (ESN) which identifies user/group

● Shared access granted only when unusedcapacity available – priority based on current conditions (optional)


Network Control by Coordinator

● Frequency Coordinator can notch-out any portion of the band and prohibit access by other agencies remotely via the NMS

● Any ‘non-participating’ agency channels can be notched-out – never used as part of the overlay

● Any ‘critical’ channels can be notched-out and never used


Advantages for All PSON Users

● Network fabric that provides Internet, email and even voice connectivity no matter where you are in the PSON – Fixed or mobile!– Broadband Internet Access– Geo-location– Voice (inter or intra-agency)– Emergency Alerts– Live video– Email


Adapt4’s XG3 CR●● Reliable data to 400kb/sReliable data to 400kb/s●● Universal Platform for Data CommunicationUniversal Platform for Data Communication●● Prioritization Prioritization

–– AgencyAgency–– EventsEvents

●● Integrated Mobile Connectivity Integrated Mobile Connectivity ……–– In vehicleIn vehicle–– Outside vehicle (with adapter)Outside vehicle (with adapter)


PSON – Integrated Connectivity Platform

EthernetEthernet

Base StationBase Station

RemoteRemoteNetworkNetwork

MgmtMgmt

Company Company HeadquartersHeadquarters

LocalLocalNetworkNetwork

MgmtMgmt

IANIAN

IANIAN

JANJAN


PSON – Integrated Mobile WAN/LAN

Dispatch Dispatch CenterCenter

PSCD

Adapt4 XG3 Cognitive Radio(w/ GPS, adaptor slot for WiFi or CR-NIC)

PSCD

Peer to Peer

Peer to PeerPeer to Peer

(using CR)(using CR)

XG4

CR-NIC

450 - 470 MHz (example)PANPAN

IANIAN

PANPAN

WiFi or CR


Example - Independent Bands with Common Channelization

217-220 MHz Band Plan217 MHz

220 MHz


The Rules Have Changed!

Strike 4!!!

By Cognitive Radio Technology!


Adapt4 www.adapt4.com

THANK YOUTHANK YOU

adapt4 cognitive radio presentation

Documents