4G vs Wifi
4G thiab Wi-Fi yog ob qho tib si mobile wireless nkag siv thev naus laus zis ua haujlwm hauv ntau zaus thiab hauv ntau qhov sib txawv. Wi-Fi tau siv rau qee lub sijhawm tam sim no thaum 4G tab tom hloov zuj zus tam sim no thiab raug xa mus rau qee lub nroog hauv Tebchaws Europe thiab Asmeskas. Wi-Fi tuaj yeem ua haujlwm txog li 250 metres nkaus xwb thiab 4G kev pabcuam tuaj yeem mus dhau Kilometers. Yeej Wi-Fi yog tus kheej wireless LAN siv nyob rau hauv luv luv nrog cov nqi teeb tsa qis thaum 4G tau siv los ntawm cov neeg siv xov tooj ntawm tes hauv tes hauj lwm los txhim kho qhov kev ua tau zoo thiab nce nrawm. Wi-Fi ua haujlwm nyob rau hauv siab zaus yog li cov ntaub ntawv tus nqi yog theoretically siab li 54 Mbits / s tab sis nws muaj peev xwm ua hauj lwm nyob rau hauv ib tug me me ntau yam nkaus xwb; Nrog 4G qhov kev cia siab yog kom ncav cuag 100 Mbits / s.
4G (Forth Generation Networks)
Txhua tus neeg tsom mus rau tam sim no tig mus rau 4G vim nws cov ntaub ntawv tus nqi. Hauv kev sib txuas lus ceev ceev nws muaj 100 Mbit / s (xws li tsheb ciav hlau lossis tsheb) thiab kev sib txuas lus qis qis lossis kev nkag mus ruaj khov yuav ua rau 1 Gbit / s. Qhov no yog kev hloov pauv loj hauv kev siv tshuab wireless.
Nws yog qhov sib npaug heev kom tau txais LAN lossis Gigabit Ethernet txuas rau lub xov tooj ntawm tes.
4G muab txhua qhov kev sib txuas lus IP nrog kev nkag mus rau cov xov tooj ntse, ntsiav tshuaj, laptops thiab txhua lub xov tooj ntse. Theoretically hais lus no 4G nkag mus ceev yog ntau tshaj Cable los yog DSL technologies nyob rau hauv lub siab 4G yog ceev tshaj ADSL, ADSL2 los yog ADSL2+.
Thaum 4G tau pib thiab yog tias koj muaj tsawg kawg 54 Mbits / s (qhov xwm txheej phem tshaj) rub tawm ntawm koj lub xov tooj ntawm tes lossis ntsiav tshuaj, koj tuaj yeem khiav ib daim ntawv thov hauv internet li koj ua hauv desktop computers. Piv txwv li koj tuaj yeem khiav Skype, YouTube, IP TV apps, Video on Demand, VoIP Client thiab ntau ntxiv. Yog tias koj muaj ib tus neeg siv VoIP ntsia ntawm koj lub cuab yeej tes koj tuaj yeem ua VoIP hu los ntawm koj lub xov tooj. Qhov no yuav tua lub suab nrov lag luam sai sai. Nyob rau tib lub sijhawm koj tuaj yeem sau npe rau txhua tus lej hauv zos rau koj tus neeg siv khoom VoIP mobile thiab pib txais kev hu xov tooj ntawm koj lub xov tooj ntawm IP. Piv txwv li yog tias koj nyob hauv New York koj tsis tas yuav tau txais NY tus lej hloov koj tuaj yeem sau npe Toronto tus lej txuas hauv koj lub xov tooj ntawm VoIP tus neeg siv. Txhua qhov chaw koj mus hauv 4G kev pab them nqi lossis thaj chaw Wi-Fi koj tuaj yeem tau txais kev hu rau koj tus lej Toronto. (Txawm tias koj tuaj yeem sau npe rau Switzerland tus lej tas thiab nyob hauv New York).
Koj tuaj yeem siv hu video hla IP thiab muaj ntsej muag sib ntsib ntawm mus. Koj tuaj yeem hu xov tooj dawb rau koj tus poj niam, tus hluas nkauj lossis txawm tuaj yeem muaj lub rooj sib tham video thaum koj mus ncig yog tias koj txuas nrog 4G.
Txawm tias 4G twb tau muab tso rau hauv Tebchaws Europe thiab North America (Qee lub chaw muab kev pabcuam yog Telnor, Tele2, Telia hauv Tebchaws Europe thiab Verizon, Sprint hauv Asmeskas), nws tseem nyob rau theem kev txhim kho.4G, ntxiv rau lub hom phiaj 100 Mbits / s cov ntaub ntawv tus nqi rau kev txav cov neeg siv khoom thiab 1GB rau cov neeg siv nyob ruaj khov kuj xav kom ua tiav cov kev pabcuam zoo dua rau cov neeg siv kawg yam tsis muaj kev poob qis thiab tso cai sib tham sib roaming thoob ntiaj teb.
Cov 4G thev naus laus zis hauv kev siv yog flash OFDM, 802.16e wireless lossis mobile WiMax thiab HC SDMA, UMB, 4G-LTE thiab Wi-Fi.
Wi-Fi (IEEE 802.11 tsev neeg)
Wireless Fidelity (Wi-Fi) yog wireless LAN thev naus laus zis uas tuaj yeem siv luv luv. Nws yog cov cuab yeej siv wireless tshaj plaws siv hauv tsev, Hotspots thiab koom nrog hauv wireless networks. Wi-Fi ua haujlwm hauv 2.4GHz lossis 5GHz uas tsis muaj kev faib tawm zaus (Tshwj xeeb faib rau ISM - Muaj Kev Tshawb Fawb thiab Kho Mob). Wi-Fi (802.11) muaj ob peb ntau yam thiab qee qhov ntawm lawv yog 802.11a, 802.11b, 802.11g thiab 802.11n. 802.11a, b, g ua haujlwm nyob rau hauv 2.4 GHz zaus thiab nyob rau hauv ib thaj tsam ntawm 40-140 meters (nyob rau hauv kev muaj tiag) thiab 802.11n ua hauj lwm nyob rau hauv 5 GHz nrog OFDM modulation technology yog li ua rau siab dua (40Mbits / S nyob rau hauv kev muaj tiag) thiab ranged rau 70-250 m.
Peb tuaj yeem teeb tsa Wireless LAN (WLAN) hauv tsev nrog Wireless Routers. Thaum koj teeb tsa Wi-Fi hauv tsev kom paub tseeb tias koj ua kom muaj kev ruaj ntseg ntawm nws kom tsis txhob muaj 3rd tog nkag. Ob peb ntawm lawv yog, Ruaj Ntseg Wireless lossis Encryption, MAC chaw nyob lim thiab ntau tshaj qhov no tsis txhob hnov qab hloov tus password qub ntawm koj lub wireless router.
Wi-Fi Yooj Yim Teeb Qhia Qhia:
(1) Txuas lub Wi-Fi router rau lub zog
(2) Nquag Wi-Fi routers yog DHCP (Dynamic Host Control Protocol) tau qhib thiab nws yuav cia li muab IP rau koj cov khoom siv.
(3) Txuas koj lub laptop thiab teeb tsa Wi-Fi router nrog kev ruaj ntseg nta.
(4) Yog tias koj xav txuas rau Is Taws Nem, txuas Wi-Fi router rau cable, DSL lossis wireless internet.
(5) Tam sim no koj tuaj yeem luam theej duab thiab ntxiv koj lub wireless network rau txhua Wi-Fi pab kiag li lawm lossis Wi-Fi ua hauv cov khoom siv.
(6) Yog tias koj xav kom muaj kev ruaj ntseg ntxiv pab kom MAC lim thiab ntxiv koj cov khoom siv MAC chaw nyob hauv router kom tsis txhob muaj kev tso cai nkag.
Qhov txawv ntawm 4G thiab Wi-Fi (802.11)
(1) Ob leeg yog Wireless Access Technology rau ntau lub hom phiaj.
(2) Feem ntau cov neeg ua haujlwm tsuas yog xa 4G thiab Wi-Fi yog rau kev siv hauv tsev / tus kheej.
(3) Wi-Fi tuaj yeem mus txog 54 Mbits / s, thaum lub hom phiaj ceev kom ua tiav nrog 4G yog 100Mbits / s
(4) Wi-Fi yog qhov luv luv wireless thev naus laus zis thiab 4G ntau yam hauv mais
(5) 4G txhawb ob lub suab thiab cov ntaub ntawv thiab Wi-Fi txhawb nqa cov ntaub ntawv nkaus xwb.
(6) Ob leeg 4G thiab Wi-Fi txhawb VoIP thiab Video Hu
(7) Ob leeg 4G thiab Wi-Fi yog txhua tus IP
