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BANDE ISM Industrial, Scientific and Medical

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Chi è?

Heinrich Rudolf Hertz (22 febbraio 1857 – 1 gennaio 1894)

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SRD (Short SRD (Short Range DevicesRange Devices))

SISTEMI A RADIOFREQUENZA, CON NORMATIVA DEFINITA IN AMBITO EUROPEO PER LIBERO UTILIZZO

Bande disponibili per libero utilizzo:

433.05 ÷ 434.79 Mhz863 ÷ 865 Mhz868 ÷ 870 Mhz 2.4 ÷ 2.5 Ghz

Utilizzo Generico AudioSotto Bande specializzate Dati,Video, Reti Lan, BlueTooth,WiFi, Zig Bee…

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Scelta della banda in funzione delle esigenze del prodotto

• Quanta strada devo fare?• Cosa devo trasmettere?

• Quanto posso consumare?

• E’ una soluzione semplice?• Quanto spazio ho?

• Quanto costa?

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Utilizzo tipico delle bande

Telecomandi codificatiTelemetria dati low speed

Audio con normativa specifica

Telecomandi codificatiTelemetria dati low speedSpecializzazione bande sia come duty cycle che come potenza

Possibile ampia banda passante per reti dati.Massima complessità del sistema RF sia come hardware (tecniche di modulazione), sia come software (reti complesse).

434 MHz

863 MHz

868 MHz

2.4 GHz

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Telemetry, Telecommand, Alarms, Data in general and other similar applications.

The band is also designed for industrial, scientific and medical (ISM) application as defined in ITU Radio Regulation.

Audio and voice signals should be avoided in the band 433.050÷434.79 Mhz.

Antenna Type: integral or dedicated

1 mW ERP

10 mW ERP

434.04

10 mW ERP

Short Range Devices: CEPT(Conférence européenne des administrations des postes et des télécommunications)

Reserved Frequencies (434 Mhz)

433.0433.05 434.79

434.0 435.0

Duty Cycle up to 100%, No channel spacing. Power density limited to -13dBm/10Khz for wideband channels with a bandwidth greater than 250Khz.

Max Duty Cycle 100% , channel spacing up to 25Khz

Max Duty Cycle 10% , No channel spacing

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Audio Short Range Devices: Reserved Frequencies (863÷865 Mhz)

Allowed antenna type integral or dedicated

10 mW ERP

864

10 mW ERP

863 865

Wireless Audio Applications – Duty cycle up to 100%, No channel spacing. In case of analogue systems the max occupied bandwidth should not exceed 300 Khz. Narrow band analogue voice devices (such as baby voice monitors, door entry systems etc ) should only use the band 864.8-865 MHz with duty cycle up to 100% and 50 Khz channelspacing.

Radio microphones – Duty cycle up to 100%, 200 Khz channel spacing.In case of analogue systems the maximum occupied bandwidth should not exceed 300 kHz

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Short Range Devices: CEPT Reserved Frequencies (868Mhz)

869.25 869.7868.7868.0 868.6ERP 869.2 869.3 869.4 869.65

Max duty cycle 1%, No channel spacing. Below 868.5 Mhz the usage of a dedicated frequency channel is avoided and a technology that allows automatic channel selection of a free channel within the band should be used.

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Max duty cycle 0.1%, No channel spacing.

Max duty cycle 10%, 25 Khz channel spacing. The whole band may also be used as 1 channel for high speed data transmission.Duty cycle up to 100%. No channel spacing. The adjacent frequency band above this band has been designated for use bythe high powered TETRA service. Manufacturers should take this into account in the design of the e.i.r.p.

Channel spacing 25Khz. An appropriate access protocol should be used (EN XXX XXX). No restriction on duty cycle

869.0

5 mW

25 mW

10 mW

ERP500 mW Antenna type: integral or dedicated

Max duty cycle 0.1%, 25Khz channel spacing. May also be used as 1 channel for high speed data transmissions

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Max duty cycle 0.1%, 25Khz channel spacing. Frequency band 869.20 ÷ 869.25 is for social alarms

Max duty cycle 10%, 25Khz channel spacing.

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10/25 mW EIRP

24402446 2454

500 mW EIRP

100 mW EIRP

No restrinction on duty cycle. No channel spacing.

10 mW EIRP Telemetry, Telecommand, Alarms, Data in general. Video applications. Industrial, scientific and medical (ISM) application as defined in ITU Radio Regulation.

25 mW EIRP Equipment for Detecting Movement and Equipment for Alert.

CEPT Reserved Frequencies 2.4 GHz

MHz2400 2483.5

No restriction on duty cycle. No channel spacing. Wideband data transmission systems: Radio Local Area Networks. For direct sequence spread spectrum the maximum spectrum power density is limited to -20 dBW/1 MHz. For FHSS the maximum spectrum power density is limited to –10 dBW/100 kHz.

Railways applications (Automatic Vehicle Identification). No restriction on duty cycle.Transmitting only in presence of trains. 5 channels, each 1.5 MHz wide.

RFID applications (Frequency Hopping Spread Spectrum (FHSS) techniques should be used as means of mitigation when more than 500 mW EIRP is used.):

500 mW EIRP, duty cycle up to 100%. No channel spacing.

4 W EIRP, duty cycle < 15 %. Power levels above 500 mW are restricted to use inside the boundaries of a building and the duty cycle shall in this case be <= 15 % in any 200 ms period (30 ms on /170 ms off).

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FORNITORI DI RIFERIMETO - Transceivers

ADF702x

ATA542x

CYRF6936

EM250

MICRF50x

MC1319x, MC1320x, MC1321x

CC1100, CC1150, CC2500, CC2550

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MODULI

XTR CYP 2.4GHz

TRX – 433/868

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Protocollo e applicazioni

Tecnologia Bluetooth

E’ stata pensata per:•Comunicazioni a corto raggio

•Essere utilizzata da dispositivi dotati di batterie

•Supportare sia traffico voce che dati

•Essere utilizzata in tutto il mondo (banda ISM)

E’ caratterizzata da:•Basso costo

•Basso consumo di potenza

•Affidabilità

•Specifice aperte

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Modulazione: Frequency hopping pseudocasuale79 canali da 1MHzSlot temporali da 625us

Piconet: Due o più dispositivi (max 7 attivi) Architettura a stella

Profili: definiscono i requisiti necessari per Permettere l’interoperabilità fra le applicazioni.

Sicurezza del canale: Pairing, autenticazione, cifraturaAutorizzazione

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MODULI

National

STMicroelectronics

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GRAZIE!!!GRAZIE!!!