Kommunikatsiooniteenuste arendus IRT0080 Loeng 5/2013 Satelliitside teenused Avo Ots telekommunikatsiooni õppetool TTÜ raadio- ja sidetehnika instituu

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1 Kommunikatsiooniteenuste arendus IRT0080 Loeng 5/2013 Satelliitside teenused Avo Ots telekommunikatsiooni õppetool TTÜ raadio- ja sidetehnika instituut 1

2 Võrdlus teiste sideviisidega 2

3 Satelliitside kui tööstusharu 3

4 Veebimaterjale

5 5 Communication Satellites

6 G E O At the Geostationary orbit the satellite covers 42.2% of the earth s surface. Theoretically 3 geostaionary satellites provides 100% earth coverage

7 7 Satellite Bands

8 I-4

9 Asukohad

10 Satellite telephony 2.4kbps voice codec Speakerphone option Voic Speed dial 1 Supplementary services Call history Caller ID Call waiting Call divert Call holding Conferencing Call barring Speed dialling Fixed number dialling Põhifunktsioonid

11 Inmarsat terminal 11

12 Messaging services Text-to-text Text-to- -to-text Web messageto-text Description IsatPhone-to- IsatPhone other MSS cellular Standard and predictive text IsatPhone-to Standard and predictive text -to- IsatPhone Message from inmarsat.com to IsatPhone Message length 160 Latin characters ~74 non-latin characters Up to 10 concatenations 160 Latin characters ~74 non-latin characters Up to 10 concatenations Truncates to: 160 Latin characters ~74 non-latin characters 160 characters Charging Per message Per message No charge No charge

13 Competitive comparison Inmarsat Iridium Thuraya Product / Model IsatPhone Pro 9555 XT Coverage Global Global 140+ countries Size (H x W x D) 170 x 54 x 39 mm 143 x 55 x 30 mm 128 x 53 x 26.5 mm Weight 279 gms 266 gms 193 gms Talk time Up to 8 hours Up to 4 hours Up to 6 hours Standby time Up to 100 hours Up to 30 hours Up to 80 hours Ingress Protection IP54 n/a IP54 Operating range -20ºC to +55ºC n/a -10ºC to +55ºC Voice service Satellite telephony Satellite telephony Satellite telephony Messaging services Text-to-text (1600 characters) Text-to- (1600 characters) Web message-to-satphone Text-to-text (1000 characters) Text-to- (1000 characters) Web message-to-satphone Text-to-text (multi-page) Text-to- (multi-page) Web message-to-satphone Data services Circuit switched: 2.4kbps (before compression) Planned for Q Circuit switched: 9.6kbps (with compression) GPRS: Up to 60/15 kbps Circuit switched: 9.6kbps Interfaces Micro USB, audio socket, external antenna port, Bluetooth Mini USB, audio socket, external antenna port, DC charger Proprietary USB, audio socket, external antenna port, DC charger Languages supported

14 THURAYA

15 Kuidas arvutada Parameter Value Totals Units Parameter Value Totals Units Frequency GHz Transmitter Receive Antenna Transmitter Power dbm Random Loss 0.50 db Modulation Loss 3.00 db Diameter 1.5 m Transmission Line Loss 0.75 db Aperture Efficiency 0.6 none Transmitted Power dbm Gain dbi Polarization Loss 0.20 db Transmit Antenna Effective RX Ant. Gain db Diameter 0.5 m Aperture Efficiency 0.55 none Received Power dbm Transmit Antenna Gain dbi Slant Path Summary Satellite Altitude 35,786 km Transmitted Power dbm Elevation Angle 14.5 degrees Transmit Anntenna dbi Gain Slant Range 41,602 km EIRP dbmi Free-space Path Loss db Path Loss db Gaseous Loss 0.65 db Effective RX 42.4 dbi Antenna Gain Rain Loss (allocated) 3.50 db Received Power dbm Path Loss db

16 Sagedusjaotus ITU-R SHARING Economical Protection Political Issues 16

17 Contour plot of the spot beam of ESA s OTS satellite projected onto the earth. The contours are in 1 db steps, normalized to 0 db at the center of the beam. Signaali jaotus (DBS)

18 Maksumus

19 ITU-R soovitused BO: Satellite delivery BR: Recording for production, archival and play-out; film for television BS: Broadcasting service (sound) BT: Broadcasting service (television) F: Fixed service M: Mobile, radiodetermination, amateur and related satellite services P: Radiowave propagation RA: Radio astronomy RS: Remote sensing systems S: Fixed-satellite service SA: Space applications and meteorology SF: Frequency sharing and coordination between fixed-satellite and fixed service systems SM: Spectrum management SNG: Satellite news gathering TF: Time signals and frequency standards emissions V: Vocabulary and related subjects 19

20 VSAT maksumus 20

21 Ajalugu (Iridium näitel) 5. mail 1997 saadeti esimene satelliit orbiidile Avalik teenus käivitati 1. november 1998 Esimese kõne tegi USA asepresident Al Gore 13. augustil 1999 anti sisse pankrotiavaldus Esialgne projekt läks hinnanguliselt maksma 6 miljardit dollarit ning müüdi edasi 25 miljoni eest Teenus taaskäivitati 2001 aastal uute investorite toel

22 Tehnoloogia 66 satelliiti asuvad 11 kaupa 6 orbitaaltasandil Iga satelliit teeb täisringi ümber Maa 100 minutiga Teenuse toimimiseks on vajalik otsevaade satelliitidega ning selletõttu ei tööta hästi siseruumides, metsas ja muudes varjatud kohates Kõige töökindlam satelliitsidelahendus, eelkõige satelliitide suure arvu tõttu

23 Cross-linked satellites

24 Low-Earth Orbit Satellites Iridium (a) The Iridium satellites from six necklaces around the earth. 24 (b) 1628 moving cells cover the earth.

25 Veebilinke lisaks ons_inc 25