Nyob rau hauv peb lub tsev ib puag ncig, muaj ntau yam wireless technologies siv, xws li Bluetooth, wifi, thiab lwm yam. Niaj hnub no peb yuav qhia ib co ntawm cov feem ntau siv wireless kis tau tus mob technologies.
Thawj yog wifi thiab WLAN.
Hauv peb lub neej niaj hnub, ntau tus neeg xav tias WiFi sib npaug rau WLAN. Qhov tseeb, ob qho tib si tsis sib npaug. WiFi tsuas yog ib qho ntawm cov thev naus laus zis ntawm WLAN.
txhais ntawm ob qho tib si
WiFi: WiFi lub npe Suav yog "mobile hotspot" lossis "wireless fidelity". Nws yog wireless hauv cheeb tsam network technology tsim nyob rau hauv IEEE 802.11 tus qauv. Tsis tas li ntawd, nws kuj tseem txhim kho "kev sib cuam tshuam" ntawm cov khoom siv wireless network raws li IEEE 802.11 tus qauv.
Kuv ntseeg tias txhua tus paub txog Bluetooth thev naus laus zis, thiab Wi-nkaus thev naus laus zis yeej zoo ib yam li nws, vim tias ob qho tib si koom nrog "cov thev naus laus zis tsis txwv" thiab cov zaus siv nyob ib puag ncig ntawm 2.4 Hz. Feem ntau hais lus, thaum lub teeb liab tsis muaj zog, qhov bandwidth tuaj yeem hloov kho mus rau 5.5Mbps, 2Mbps lossis txawm 1Mbps, vim tias qhov no tuaj yeem ua kom muaj kev ruaj ntseg thiab kev ntseeg siab ntawm lub network rau qee yam.
WLAN: Suav txhais lus yog "wireless local area network", nws yog cov ntaub ntawv xa mus. Qhov laj thawj yog vim li cas nws tuaj yeem paub txog kev sib txuas lus thiab cov peev txheej sib koom tes sib koom ua ke yog qhov tseeb vim nws siv "xov tooj cua zaus thev naus laus zis" los xa cov ntaub ntawv. Tam sim no, nws cov qauv tseem yog IEEE 802.11, tab sis nws tsis tuaj yeem tsis meej pem nrog WiFi. Raws li rau cov zaus bands siv, nws yog 2.4G Hz thiab 5G Hz. Nyob ntawm qhov xwm txheej, nws qhov ceev tshaj plaws tuaj yeem ncav cuag 54Mbps.
Qhov txawv ntawm WIFI thiab WLAN
WiFi: Nws qhov kev pab them nqi yog me me, thiab nws feem ntau haum rau cov chaw uas muaj qhov chaw me me xws li tsev thiab chaw ua haujlwm. Yog tias nws tsis yog lub teb chaws kev sib txuas lus lossis qee cov ntsiav tshuaj, lub npe network hauv lawv qhov kev xaiv "Settings" feem ntau tshwm sim ua "WiFi". Daim ntawv thov thaj chaw ntawm WiFi suav nrog kev tshaj xov xwm online, cov khoom siv tes tuav, kev lom zem txhua hnub, tsheb ciav hlau neeg caij tsheb, thiab chav dej pej xeem.
WLAN: Nws cov xov tooj cua nthwv dej yog dav dua li ntawm WiFi, thiab nws feem ntau siv hauv tsev kawm ntawv, tshav dav hlau thiab lwm qhov chaw pej xeem nrog thaj chaw dav. Yog tias lub xov tooj ntawm tes siv yog lub xov tooj hauv tebchaws tiag, txawm tias nws yog Apple lub xov tooj lossis lub xov tooj Android, lub npe ntawm nws lub wireless network yuav yog WLAN lossis Wireless LAN. Raws li rau daim ntawv thov raug xwm txheej ntawm WLAN, nws ntau dua li WiFi. Nws yog siv nyob rau hauv loj qhov chaw xws li nyob nruab nrab ntawm lub tsev, catering, khw muag khoom, lag luam, kev kho mob, thawv tis yards, soj ntsuam systems, exhibition venues, thiab warehouses tswj.
Kev sib raug zoo ntawm lawv yog dab tsi?
Lub "WiFi" qhia nyob rau hauv wireless network yog tiag tiag tsuas yog ib tug technology ntawm WLAN network. Lub "WAPI" thiab "WiFi" uas peb tuaj yeem pom hauv peb lub neej niaj hnub yog cov thev naus laus zis suav nrog WLAN. Tam sim no, txhua lub xov tooj ntawm tes ntawm National Bank tuaj yeem txhawb nqa ob lub thev naus laus zis ntawm "WAPI" thiab "WiFi".
Tom ntej no yog Bluetooth.
Lo lus Bluetooth yog muab los ntawm Harald Bluetooth, lub npe ntawm King Harald ntawm Denmark nyob rau xyoo pua kaum. Bluetooth's LOGO los ntawm kev sib xyaw ua ke ntawm cov ntawv sau tom qab Fysac, uas muab cov npe H thiab B ntawm King Harald lub npe los ua lub logo xiav uas txhua tus paub niaj hnub no.
Bluetooth yog dab tsi?
Bluetooth yog lub xov tooj cua thev naus laus zis uas txhawb nqa kev sib txuas lus luv luv ntawm cov khoom siv (feem ntau hauv 10m). Nws tuaj yeem hloov pauv cov ntaub ntawv wireless ntawm ntau yam khoom siv xws li xov tooj ntawm tes, PDAs, wireless headsets, laptops, cov khoom siv sib txuas, thiab lwm yam. Kev siv "Bluetooth" thev naus laus zis tuaj yeem ua kom yooj yim rau kev sib txuas lus ntawm kev sib txuas lus ntawm lub davhlau ya nyob twg, thiab tseem tuaj yeem ua tiav kev sib txuas lus yooj yim ntawm lub cuab yeej thiab Is Taws Nem, kom cov ntaub ntawv xa mus sai dua thiab ua haujlwm tau zoo, nthuav dav txoj hauv kev rau kev sib txuas lus wireless.
Kev txhim kho keeb kwm ntawm Bluetooth
Bluetooth thev naus laus zis yog lub tshuab wireless sib koom ua ke tshaj tawm los ntawm tsib lub tuam txhab nto moo thoob ntiaj teb - Ericsson, Nokia, Toshiba, International Business Machines Corporation (IBM) thiab Intel - thaum lub Tsib Hlis 1998. Kev sib txuas lus tshiab. Cov khoom siv Bluetooth yog cov nqa khoom tseem ceeb ntawm kev siv tshuab Bluetooth. Cov khoom siv Bluetooth feem ntau suav nrog khoos phis tawj, xov tooj ntawm tes, thiab lwm yam. Cov khoom siv Bluetooth hauv tsev Bluetooth modules uas txhawb nqa Bluetooth xov tooj cua sib txuas thiab cov ntawv thov software. Kev sib txuas ntawm Bluetooth ntaus ntawv yuav tsum nyob rau hauv ib qho kev sib tw rau kev ua khub. Qhov kev tshawb nrhiav kev sib koom ua ke no yog hu ua luv luv-nrhiav ib ntus network hom, tseem hu ua piconet, thiab tuaj yeem ua tau txog li 8 khoom siv. Bluetooth thev naus laus zis tau hloov kho nyob rau hauv ntau qhov loj versions txij li thaum nws tso tawm, uas yog:
Bluetooth 1.0: Tus nqi sib kis yog li 1M/s. Nws yooj yim cuam tshuam los ntawm cov khoom siv nrog tib zaus thiab cuam tshuam rau kev sib txuas lus zoo.
Bluetooth 2.
Bluetooth 2.1: Txhawm rau txhim kho cov teeb meem ntawm Bluetooth thev naus laus zis, Bluetooth SIG lub koom haum tau tsim lub Bluetooth 2.1+EDR version ntawm Bluetooth technology. Txhim kho cov txheej txheem kev sib txuas ua ke: Nruab nrog NFC mechanism rau kev sib txuas thiab kev sib txuas lus ntawm ob lub xov tooj ntawm tes uas siv Bluetooth; zoo zog txuag nyhuv.
Bluetooth 3.0+HS: Bluetooth 3.0 kis tau tus mob 24M/s Lub hauv paus ntawm 3.0 yog lub tshuab hluav taws xob hloov pauv tshiab uas tso cai rau Bluetooth raws tu qauv pawg kom xaiv lub xov tooj cua kom raug rau txhua txoj haujlwm.
Bluetooth 4.0: Nws suav nrog Bluetooth classic, siab ceev Bluetooth thiab Bluetooth qis zog raws tu qauv. Nws siv tsawg zog raws li 3.0. Nws yog tsuas yog tsom rau cov ntawv thov uas yuav tsum tau siv hluav taws xob tsawg heev thiab siv los ntawm cov roj teeb pob.
Ntawm lawv, 4.1: ntxiv Internet ntawm Tej yam nta thiab txhawb batch cov ntaub ntawv pauv tus nqi coexistence. Qhov loj tshaj ntawm 4.1 yog tias nws tso cai rau ntau lub Bluetooth ntse li nkag mus rau LAN lossis Is Taws Nem los ntawm ib lub davhlau ya nyob twg.
Bluetooth 5.0: Kev sib kis ntev dua thiab muaj zog dua.
Cov uas peb siv feem ntau hauv peb lub neej niaj hnub yog Bluetooth 4.0 thiab Bluetooth 4.1.
Cov yam ntxwv ntawm Bluetooth
1. Bluetooth technology muaj feem xyuam rau ntau yam khoom siv thiab tsis xav tau cov cables. Nws txuas computers thiab telecommunications networks wirelessly rau kev sib txuas lus.
2. Kev ua haujlwm zaus band ntawm Bluetooth technology yog universal thoob ntiaj teb thiab yog haum rau unlimited siv los ntawm cov neeg siv thoob plaws lub ntiaj teb no, daws "lub teb chaws ciam teb" obstacle ntawm cellular mobile networks.
3. Bluetooth technology muaj kev ruaj ntseg zoo thiab muaj peev xwm tiv thaiv kev cuam tshuam. Vim tias Bluetooth thev naus laus zis muaj ntau zaus hopping muaj nuj nqi, nws muaj txiaj ntsig zoo kom tsis txhob cuam tshuam qhov chaw hauv ISM band. Bluetooth thev naus laus zis muaj kev sib raug zoo thiab tuaj yeem ua tiav kev ua tau zoo sib xws hauv ntau lub tshuab ua haujlwm.
4. Kev sib kis luv luv: Nyob rau theem no, kev ua haujlwm tseem ceeb ntawm Bluetooth tshuab yog li 10 meters. Tom qab nce lub xov tooj cua zaus zog, Bluetooth technology tuaj yeem ua haujlwm nyob rau hauv thaj tsam ntawm 100 meters. Tsuas yog nyob rau hauv ib qhov deb tuaj yeem ua haujlwm zoo ntawm Bluetooth thaum lub sij hawm kis tau tus mob yuav lav. Thiab efficiency, txhim kho kev sib kis ceev ntawm Bluetooth. Tsis tas li ntawd, thaum lub sij hawm kev sib txuas ntawm Bluetooth technology, kev cuam tshuam ntawm kev siv tshuab thiab lwm yam khoom siv hluav taws xob tuaj yeem txo tau zoo, yog li ua kom ntseeg tau tias Bluetooth technology tuaj yeem ua haujlwm ib txwm.
Thaum kawg, muaj NFC
Kuv ntseeg tias txhua tus neeg yuav tsis paub nrog NFC. Raws li kev sib txuas lus yooj yim thev naus laus zis, NFC tau ua haujlwm rau txhua tus neeg nyob ntsiag to tau ntau xyoo. Nws tuaj yeem pom txhua qhov chaw hauv peb lub neej. Piv txwv li, subway, tsheb npav, thiab lwm yam.
NFC thev naus laus zis tau hloov zuj zus los ntawm kev txheeb xyuas lub xov tooj cua tsis muaj xov tooj cua (RFID) thiab tau pib ua ke tsim los ntawm Philips Semiconductors (tam sim no NXP Semiconductors), Nokia thiab Sony. Ze ntawm Kev Sib Txuas Lus (NFC) yog qhov luv luv, lub tshuab hluav taws xob ntau zaus uas ua haujlwm ntawm qhov zaus ntawm 13.56MHz nyob rau qhov deb ntawm 20 centimeters. Nws kis ceev yog 106 Kbit / sec, 212 Kbit / sec lossis 424 Kbit / sec. Tam sim no, nyob ze kev sib txuas lus tau dhau los ntawm ISO/IEC IS 18092 tus qauv thoob ntiaj teb, ECMA-340 tus qauv thiab ETSI TS 102 190 tus qauv.
NFC muaj peb hom kev ua haujlwm
1. Hom nquag: Hauv hom nquag, NFC lub davhlau ya nyob twg tuaj yeem ua raws li daim npav nyeem ntawv, tso lub xov tooj cua zaus los txheeb xyuas thiab nyeem / sau lwm yam ntaub ntawv NFC ntaus ntawv.
2. Passive hom: Hom no tsuas yog qhov txawv ntawm hom nquag. Lub sijhawm no, NFC davhlau ya nyob twg yog simulated ua daim npav. Nws tsuas yog passively teb rau lub xov tooj cua zaus teb tawm los ntawm lwm yam khoom siv thiab nyeem / sau cov ntaub ntawv.
3. Bidirectional hom: Hauv hom no, ob qho tib si NFC terminals nquag emit xov tooj cua zaus teb los tsim kev sib txuas lus point-to-point. Nws yog sib npaug rau ob qho tib si NFC khoom siv nyob rau hauv hom nquag.
Kev siv tswv yim ntawm NFC
Qhov tseeb, NFC tuaj yeem pom hauv ntau qhov chaw hauv lub neej txhua hnub. Xws li daim npav tswj kev nkag, npav npav, them nyiaj hauv xov tooj, thiab lwm yam. Tab sis kuv tus kheej xav tias cov cuab yeej no tsis siv tau. Txawm hais tias NFC thev naus laus zis muaj kev nyab xeeb dua li lwm cov thev naus laus zis vim nws cov yam ntxwv kis mus rau qhov taw tes, nws muaj ntau qhov kev txwv vim tias nws tsuas yog siv tau nyob ze. Yog li txawm hais tias peb Nws tau siv ntau hauv lub neej niaj hnub, tab sis piv rau ob lub thev naus laus zis dhau los, txhua tus tsis paub tshwj xeeb nrog nws.
