Optical Wireless Communication (OWC) ndi njira yolumikizirana ndi kuwala komwe ma siginecha amatumizidwa pogwiritsa ntchito kuwala kosawoneka bwino, infrared (IR), kapena ultraviolet (UV).
Makina a OWC omwe amagwira ntchito pamafunde owoneka (390 — 750 nm) nthawi zambiri amatchedwa kulumikizana kowoneka bwino (VLC). Makina a VLC amapezerapo mwayi pa ma diode otulutsa kuwala (ma LED) ndipo amatha kugunda mwachangu kwambiri popanda zotsatira zowonekera pakuwunikira komanso diso la munthu. VLC itha kugwiritsidwa ntchito m'mapulogalamu osiyanasiyana kuphatikiza ma LAN opanda zingwe, LAN yamunthu opanda zingwe ndi maukonde amagalimoto. Kumbali inayi, makina a OWC oyambira pansi, omwe amadziwikanso kuti ma free space Optics (FSO), amagwira ntchito pafupi ndi ma infrared frequency (750 — 1600 nm). Makinawa nthawi zambiri amagwiritsa ntchito zotulutsa za laser ndipo amapereka maulalo owoneka bwino a protocol otsika mtengo okhala ndi mitengo yayikulu ya data (ie 10 Gbit/s pa utali wotalikirapo wa mafunde) ndikupereka njira yothanirana ndi zovuta zobwerera m'mbuyo. Chidwi pa kuyankhulana kwa ultraviolet (UVC) chikukulirakuliranso chifukwa cha kupita patsogolo kwaposachedwa kwa magwero a kuwala kwamphamvu / zowunikira zomwe zimagwira ntchito mu UV spectrum (200 — 280 nm). M'magulu otchedwa deep ultraviolet band, kuwala kwa dzuwa kumakhala kosasamala pamtunda, zomwe zimapangitsa kuti zikhale zotheka kupanga chojambulira chowerengera photon chokhala ndi malo ambiri omwe amawonjezera mphamvu zolandirira popanda kuwonjezera phokoso lakumbuyo.
Kwa zaka zambiri, chidwi cha ma optical wireless communications chakhala chochepa makamaka kumagulu ankhondo achinsinsi ndi malo ogwiritsira ntchito mlengalenga kuphatikizapo ma intersatellites ndi maulalo akuzama mlengalenga. Mpaka pano, kulowa kwa msika kwa OWC kwakhala kochepa, koma IrDA ndi njira yopambana kwambiri yopanda zingwe yopanda zingwe.
Kuchokera pamalumikizidwe owoneka bwino m'mabwalo ophatikizika mpaka maulalo akunja olumikizirana ndi ma satelayiti, mitundu yosiyanasiyana yolumikizirana yopanda zingwe ingagwiritsidwe ntchito panjira zosiyanasiyana zoyankhulirana.
Kulankhulana opanda zingwe kugawika m'magulu asanu molingana ndi kufalikira:
1. Mipata yayifupi kwambiri
Kulankhulana kwa interchip mumapaketi opakidwa ndi opakidwa mwamphamvu amitundu yambiri.
2. Mipata yaifupi
Mu muyezo IEEE 802.15.7, kulankhulana pansi pa madzi pansi opanda zingwe Body Local Area Network (WBAN) ndi opanda zingwe Personal Local Area Network (WPAN) mapulogalamu.
3. Mtundu wapakatikati
IR yamkati ndi kulumikizana kwa kuwala kowoneka bwino (VLC) kwa ma netiweki am'deralo opanda zingwe (WLans) komanso kulumikizana pakati pagalimoto ndi galimoto ndi magalimoto kupita kumagulu.
Gawo 4: Kutali
Kulumikizana kwa interbuilding, komwe kumadziwikanso kuti Free space Optical Communication (FSO).
5. Mtunda wowonjezera
Kuyankhulana kwa laser mumlengalenga, makamaka kwa maulalo pakati pa ma satelayiti ndi kukhazikitsidwa kwa magulu a nyenyezi.
Nthawi yotumiza: Jun-01-2023