Ko te Whakawhitiwhiti Kōrero Ahokore Whatu (OWC) he momo whakawhitiwhiti kōrero whatu e tukuna ai ngā tohu mā te whakamahi i te mārama kitea, te mārama pūwhero (IR), te mārama hihi ultraviolet (UV) rānei kāore i te ārahitia.
Ko ngā pūnaha OWC e mahi ana i ngā roangaru e kitea ana (390 — 750 nm) e kiia ana ko te whakawhitiwhiti mārama e kitea ana (VLC). Ka whakamahia e ngā pūnaha VLC ngā diode e whakaputa ana i te mārama (LED) ā, ka taea te pāorooro i ngā tere tino teitei me te kore e kitea he pānga ki te putanga rama me te kanohi tangata. Ka taea te whakamahi i te VLC i roto i te whānuitanga o ngā tono tae atu ki te LAN ahokore, te LAN whaiaro ahokore me te whatunga waka. I tētahi atu taha, ko ngā pūnaha OWC pūwāhi-ki-pūwāhi e ahu mai ana i te whenua, e mōhiotia ana ko ngā pūnaha whatu mokowā kore utu (FSO), e mahi ana i ngā auau tata-infrared (750 — 1600 nm). Ko te tikanga, ka whakamahia e ēnei pūnaha ngā kaituku laser, ā, ka tukuna he hononga mārama kawa utu-whai hua me ngā tere raraunga teitei (arā, 10 Gbit/s ia roangaru) ā, ka whakaratohia he otinga pea ki ngā aukati backhaul. Kei te tipu haere hoki te hiahia ki te whakawhitiwhiti ultraviolet (UVC) nā ngā whanaketanga hou o ngā puna/pūoko mārama totoka e mahi ana i roto i te whānuitanga UV matapo-rā (200 — 280 nm). I roto i tēnei roopu hihi ultraviolet hōhonu, he iti noa iho te irahiko o te rā i te taumata whenua, ā, ka taea te hoahoa i tētahi taputapu tatau-ira me tētahi kaiwhiwhi whānui e whakanui ana i te pūngao e whiwhihia ana me te kore e tāpiri atu i te haruru papamuri.
Mō ngā tekau tau, kua whakawhāitihia te hiahia ki ngā whakawhitiwhitinga ahokore whatu ki ngā tono hōia huna me ngā tono ātea tae atu ki ngā hononga ātea waenga me te hōhonu. Tae noa ki tēnei wā, he iti noa te urunga o OWC ki te mākete whānui, engari he otinga tuku ahokore tawhiti-poto tino angitu a IrDA.
Mai i te hononga whatu i roto i ngā ara iahiko whakauru ki ngā hononga hangahanga o waho ki ngā whakawhitiwhitinga amiorangi, ka taea pea te whakamahi i ngā momo whakawhitiwhitinga ahokore whatu i roto i te whānuitanga o ngā tono whakawhitiwhitinga kōrero.
E rima ngā wāhanga o te whakawhitiwhiti kōrero ahokore whatu, e ai ki te whānuitanga o te tuku:
1. Ngā tawhiti tino poto
Te whakawhitiwhiti kōrero ā-maramara i roto i ngā mōkihi maramara maha kua whakarārangihia, kua tākai piri.
2. Ngā tawhiti poto
I roto i te paerewa IEEE 802.15.7, ko te whakawhitiwhiti kōrero i raro i te wai i raro i ngā tono ahokore a te Whatunga Rohe Tinana (WBAN) me te Whatunga Rohe Whaiaro (WPAN).
3. Awhe waenga
Te whakawhitiwhiti kōrero IR me te mārama kitea (VLC) o roto mō ngā whatunga rohe ahokore (WLan) tae atu ki te whakawhitiwhiti kōrero waka-ki-waka me te waka-ki-hanganga.
Hipanga 4: Mamao
Te hononga ā-whare, e mōhiotia ana ko te whakawhitiwhiti kōrero whatu ā-wāhi kore utu (FSO).
5. Tawhiti atu
Te whakawhitiwhiti kōrero taiaho i te wāhi, inā koa mō ngā hononga i waenga i ngā amiorangi me te whakatūnga o ngā whetū amiorangi.
Wā tuku: Pipiri-01-2023