Kamangidwe ka Reverse-TDoA ka downlink: ma beacon okhazikika a batri amaulutsa, wolandira mkati mwa chisoti amamvetsera.
Kuyenda kwa satellite kumayima pa khoma la nyumba. Bluetooth ndi Wi-Fi zimangosonyeza chipinda chomwe wogwira ntchito alimo — zosakwanira kwenikweni kwa madera owopsa a mafakitale. Munthu ataima motetezeka pafupi ndi chotchinga ndi munthu akulowa m'malo oletsedwa ndi zochitika zosiyana kwenikweni. Kupitirira mulingo wina wa kulondola, ma coordinates amasintha kuchoka ku zolemba zosavuta za mapu kukhala zochitika zotsimikiziridwa: kulowa m'malo, nthawi yokhala, ndi njira zenizeni zoyenda.
UWB yapereka kutsatira kolondola kwambiri kwa zaka zopitilira khumi, koma kugwiritsidwa ntchito kwakukulu m'mafakitale kwaima chifukwa cha zochitika zamalonda osati zolephera zaukadaulo. M'makina wamba a uplink-TDoA, ma anchor okhazikika amayenera kulandira mapaketi kuchokera ku tag iliyonse, kusunga kugwirizanitsa nthawi ya sub-nanosecond kudzera mu waya, ndi kubweza miyeso kudzera mu Ethernet. Ziwerengero za mafakitale zikuwonetsa kuti pafupifupi 85% ya ndalama zonse zoyikira zimachokera ku zida za zingwe zokha: ma conduit, ma switch a PoE, zikwezo za mafakitale, ndi ntchito zamagetsi zovomerezeka.
Kuchuluka ndi chopinga chachiwiri chachikulu. Ziwerengero za ma tag zotsatsidwa nthawi zambiri ndi masamu ongopeka: ndi kufikira kwapang'onopang'ono kwa ALOHA pa 18% yokha, pafupifupi gawo limodzi mwa atatu la mauthenga amagundana. Ma profile apamwamba kwambiri a data omwe amatsatsidwa kuti ali ndi kuchuluka ndi omwe amalephera kwambiri ku chitsulo chomanga ndi mafunde obwereza. Pachitetezo cha mafakitale, paketi yotayika ndi wogwira ntchito wosayang'aniridwa.
Lipoti laukadaulo TR-XENOM-2025-01, kuyesa kosasunthika pa nsanja ya DW1000 ndi ma beacon anayi.
Tidasintha njira yoyezera. Ma beacon okhazikika, amphamvu ochepa amaulutsa mapaketi a UWB, ndipo wolandira wophatikizidwa mu chisoti amangomvetsera. Ma beacon amagwira ntchito modziyimira popanda kusamalira kulumikizana kwa backhaul kapena kumvetsera ma tag.
Palibe maukonde ogawa nthawi ndipo palibe zingwe zobwezera deta. Pa nthawi yowulutsa ya 300 ms, beacon imagwira ntchito pafupifupi masiku asanu ndi limodzi pa paketi ya 10,000 mAh yokhazikika — yoyesedwa pabwalo ndi kutsimikiziridwa pa ntchito zosalekeza. Ma beacon amaikidwa pomwe kuwonekera kukufunika, osati pomwe zingwe za netiweki zikulamula.
Ma beacon ndi njira za RF za wolandira sizifuna kuyesa kovuta kwa chipangizo chilichonse. Kukhazikitsa ndi kukonza wailesi kokha: kusankha malo a ma anchor, kulemba ma coordinate a survey, ndi kutsimikizira madera a chophimba.
Zisoti zimagwira ntchito mwakumvetsera kokha. Kuonjezera antchito 10,000 kumapanga ziro zowulutsa zowonjezera za UWB ndi ziro kugundana kwa wailesi. Kukula kwa zida kumadalira kokha kukula kwa malo ndi mawonekedwe — osati pa chiwerengero cha anthu.
Wolandira UWB amamangidwa mu chisoti chachitetezo. Palibe tag yachiwiri yoti musungire, kuyitanitsa, kutenga, kapena kusintha, ndipo palibe mwayi woti wogwira ntchito asiyire beacon yake posungira zovala.
Tidasankha mwadala mitengo yochepa ya data ndi ma preamble atali, kuyika patsogolo kulumikizana kwa RF ndi kupirira mafunde obwereza pafupi ndi chitsulo cholemera kuposa ziwerengero zongopeka zapamwamba zomwe zimalephera m'mafakitale enieni.
Ziwerengerozi zimachokera ku chipinda chokhala ndi zida, osati labotale lopanda kanthu: kusawona mzere kosalekeza, njira za wailesi zikudutsa makoma awiri a plasterboard, awiri mwa ma beacon anayi atayima pafupi ndi maprinta a resin okhala ndi zipinda zachitsulo zochiritsira, ndipo galasi loyang'ana lili moyang'anizana ndi wachitatu. Palibe fyuluta ya Kalman, kusuntha kwapakati, kapena kusalaza kwa njira kulikonse komwe kunagwiritsidwa ntchito.
Kuyesa kunagwiritsa ntchito ma beacon anayi ndi wolandira wosayima pa nsanja ya DW1000. Kamangidwe kameneka kakhalanso pa DW3000, koma zotsatira za ziwerengerozi sizisinthira kumeneko — kapena ku malo a mafakitale pamlingo waukulu ndi anthu oyenda — popanda kampeni yoyezera yosiyana.
Mndandanda wopsinjika mwadala ndi mbali ya deta yosindikizidwa: kupezeka kwa ma coordinate kunatsika kufika 15.79% ndipo kulakwitsa kwa P95 radial kunakwera kufika 93.94 cm. Kuchotsa kugwirizanitsa nthawi kwa waya kumachepetsa kuyika. Sizichotsa kufunikira kwa uinjiniya wa chophimba ndi kuyesa kovomerezeka.
Kupezeka m'malo owopsa, kuzindikiridwa nthawi yolowa
Nthawi yokhala m'malo antchito, owopsa, autumiki ndi odikirira
Kusintha kwa kanema ya wailesi mwachangu malinga ndi dera
Kulamulira kulowa kwa zipinda zina
Kupezeka kwa ogwira ntchito panthawi yotuluka
Kusanthula njira ndi zochitika, ndi kupanga zochitika za chipinda choyang'anira
Kamangidwe komweko kangayenerere kuyenda m'nyumba pa mafoni a ogula — womvetsera wopanda kanthu akuwerengera malo ake, ndi ma beacon omwe mwachilengedwe sadziwa amene akumvetsera. Izi ndi zomwe FiRa imatcha Kuyenda M'nyumba Kosatsatiridwa. Apple idayambitsa API ya DL-TDoA mu iOS 26 ndipo Google idawonjezera thandizo la FiRa 4.0 mu Android 17, koma mtundu wathu wa paketi ndi wachinsinsi ndipo ma API a foni samamvetsetsa. Kusintha ma beacon kukhala mode wamba wa FiRa kungatanthauze kubwerera ku maukonde a ma anchor omwe amayenera kugwirizana nthawi zonse — kutaya ufulu wodziyimira womwe kamangidwe kameneka kanamangidwira. Njira yachindunji imafuna kuti opanga Apple ndi Android atsegule mwayi wopanga ma developer kulandira mafelemu a UWB ndi zolemba zawo za nthawi. Mpaka izi zichitike, iyi ndi njira ya kafukufuku, osati mbali yomwe yatumizidwa, ndipo timasunga kusiyana kumeneku mwadala.