{"id":89471,"date":"2020-07-23T01:42:12","date_gmt":"2020-07-22T23:42:12","guid":{"rendered":"https:\/\/prohoster.info\/blog\/administrirovanie\/wi-fi-6-nuzhen-li-novyj-standart-besprovodnoj-svyazi-obychnomu-polzovatelyu-i-esli-da-to-zachem"},"modified":"2020-07-23T01:42:12","modified_gmt":"2020-07-22T23:42:12","slug":"wi-fi-6-nuzhen-li-novyj-standart-besprovodnoj-svyazi-obychnomu-polzovatelyu-i-esli-da-to-zachem","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/administrirovanie\/wi-fi-6-nuzhen-li-novyj-standart-besprovodnoj-svyazi-obychnomu-polzovatelyu-i-esli-da-to-zachem","title":{"rendered":"Wi-Fi 6: pot\u0159ebuje nov\u00fd standard bezdr\u00e1tov\u00e9 komunikace b\u011b\u017en\u00fd u\u017eivatel a pokud ano, tak pro\u010d?","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

\"Wi-Fi
\n
\nVyd\u00e1v\u00e1n\u00ed certifik\u00e1t\u016f za\u010dalo 16. z\u00e1\u0159\u00ed lo\u0148sk\u00e9ho roku. Od t\u00e9 doby bylo publikov\u00e1no mnoho \u010dl\u00e1nk\u016f a pozn\u00e1mek o nov\u00e9m standardu bezdr\u00e1tov\u00e9ho p\u0159ipojen\u00ed, v\u010detn\u011b t\u011bch na webu Habra. V\u011bt\u0161ina t\u011bchto \u010dl\u00e1nk\u016f jsou technick\u00e9 specifikace technologie s popisem v\u00fdhod a nev\u00fdhod.<\/p>\n

S t\u00edm je v\u0161e v po\u0159\u00e1dku, tak to m\u00e1 b\u00fdt, t\u00edm sp\u00ed\u0161 na technick\u00fdch port\u00e1lech. Rozhodli jsme se v\u0161ak zjistit, pro\u010d by WiFi 6 m\u011blo zaj\u00edmat b\u011b\u017en\u00e9ho u\u017eivatele. Obchod, pr\u016fmysl atd. \u2014 tady se bez nov\u00fdch komunika\u010dn\u00edch protokol\u016f neobejdeme. Ale zm\u011bn\u00ed WiFi 6 \u017eivot oby\u010dejn\u00e9ho \u010dlov\u011bka, kter\u00fd nehodl\u00e1 stahovat terabajty film\u016f? Poj\u010fme se na to pod\u00edvat.
\n<\/a><\/noindex> <\/p>\n

Probl\u00e9m WiFi p\u0159edchoz\u00edch generac\u00ed<\/h3>\n

\nHlavn\u00edm probl\u00e9mem je to, \u017ee pokud k bezdr\u00e1tov\u00e9mu p\u0159\u00edstupov\u00e9mu bodu p\u0159ipoj\u00edte mnoho za\u0159\u00edzen\u00ed, rychlost se sni\u017euje. To je zn\u00e1m\u00e9 ka\u017ed\u00e9mu, kdo se pokusil p\u0159ipojit k ve\u0159ejn\u00e9mu p\u0159\u00edstupov\u00e9mu bodu v kav\u00e1rn\u011b, obchodn\u00edm centru nebo na leti\u0161ti. \u010c\u00edm v\u00edce za\u0159\u00edzen\u00ed je p\u0159ipojeno k p\u0159\u00edstupov\u00e9mu bodu, t\u00edm pomaleji funguje internet. V\u0161echna tato za\u0159\u00edzen\u00ed 'konkuruj\u00ed' o kan\u00e1l. A router se sna\u017e\u00ed vybrat, kter\u00e9mu za\u0159\u00edzen\u00ed poskytne p\u0159\u00edstup. N\u011bkdy to dopadne tak, \u017ee p\u0159\u00edstup z\u00edsk\u00e1 chytr\u00e1 \u017e\u00e1rovka, nikoli telefon, na kter\u00e9m prob\u00edh\u00e1 d\u016fle\u017eit\u00e1 videokonference.<\/p>\n

A to je velmi d\u016fle\u017eit\u00e1 nev\u00fdhoda, kterou b\u011b\u017en\u00fd u\u017eivatel poc\u00edt\u00ed. Firmy, kter\u00fdm z\u00e1le\u017e\u00ed na spolehliv\u00e9m p\u0159ipojen\u00ed, se n\u011bjak dost\u00e1vaj\u00ed z t\u00e9to situace, instaluj\u00ed dal\u0161\u00ed p\u0159\u00edstupov\u00e9 body, rezervuj\u00ed komunika\u010dn\u00ed kan\u00e1ly atd.<\/p>\n

A co nab\u00edz\u00ed WiFi 6?<\/h3>\n

\nN\u00e1r\u016fst v\u00fdkonu a stability kan\u00e1lu<\/b><\/p>\n

Nov\u00fd standard nelze nazvat panaceou, nejedn\u00e1 se o kvalitativn\u011b novou technologii, ale o zlep\u0161en\u00ed ji\u017e existuj\u00edc\u00ed. Nicm\u00e9n\u011b, jedna z novinek je velmi d\u016fle\u017eit\u00e1, mluv\u00edme o technologii OFDMA. Ta v\u00fdrazn\u011b zvy\u0161uje rychlost a stabilitu kan\u00e1lu, co\u017e umo\u017e\u0148uje jeho d\u011blen\u00ed na n\u011bkolik (a p\u0159i pot\u0159eb\u011b na velk\u00e9 mno\u017estv\u00ed) podkan\u00e1l\u016f. 'Ka\u017ed\u00e9 s\u00e9g\u0159e pat\u0159\u00ed jej\u00ed n\u00e1u\u0161nice', jak prav\u00ed p\u0159\u00edslov\u00ed. Co se t\u00fdk\u00e1 WiFi 6 \u2014 ka\u017ed\u00e9mu za\u0159\u00edzen\u00ed vlastn\u00ed komunika\u010dn\u00ed kan\u00e1l. To se naz\u00fdv\u00e1 v\u00edcestup\u0148ov\u00fd p\u0159\u00edstup s ortogon\u00e1ln\u00edm frekven\u010dn\u00edm d\u011blen\u00edm.<\/p>\n

P\u0159edchoz\u00ed standard, pokud bychom m\u011bli vz\u00edt analogii logistick\u00e9 spole\u010dnosti, pos\u00edl\u00e1 n\u00e1klady po jednom, p\u0159i\u010dem\u017e ka\u017ed\u00e9mu klientovi pos\u00edlaj\u00ed samostatn\u00e9 vozidlo s jeho n\u00e1kladem. Tato vozidla neodj\u00ed\u017ed\u011bj\u00ed sou\u010dasn\u011b, ale podle pl\u00e1nu, p\u0159\u00edsn\u011b jedno za druh\u00fdm. V p\u0159\u00edpad\u011b WiFi 6 jedno vozidlo veze v\u0161echny z\u00e1silky sou\u010dasn\u011b, a po p\u0159\u00edjezdu si ka\u017ed\u00fd p\u0159\u00edjemce vyb\u00edr\u00e1 svou vlastn\u00ed z\u00e1silku.<\/p>\n

\"Wi-Fi
\nNav\u00edc vylep\u0161en\u00e1 technologie MU-MIMO umo\u017e\u0148uje sou\u010dasn\u011b vys\u00edlat sign\u00e1l, co\u017e zvl\u00e1dala i za\u0159\u00edzen\u00ed podporuj\u00edc\u00ed p\u0159edchoz\u00ed standard bezdr\u00e1tov\u00e9 komunikace, a tak\u00e9 jej p\u0159ij\u00edmat. V\u00fdsledkem je, \u017ee nedoch\u00e1z\u00ed k interferenci sign\u00e1lu; pokud bychom um\u00edstili dv\u011b p\u0159\u00edstupov\u00e9 body s podporou WiFi 6 vedle sebe, budou pracovat na sv\u00e9m vlastn\u00edm komunika\u010dn\u00edm kan\u00e1lu bez v\u011bt\u0161\u00edch probl\u00e9m\u016f. A ka\u017ed\u00fd z nich p\u0159ijme sign\u00e1l, kter\u00fd je zam\u011b\u0159en na \u201asv\u00e9\u2018 za\u0159\u00edzen\u00ed. Po\u010det sou\u010dasn\u00fdch spojen\u00ed byl nav\u00fd\u0161en na 8.<\/p>\n

P\u0159edchoz\u00ed standard komunikace nedovoloval p\u0159\u00edstupov\u00e9mu bodu rozli\u0161it \u201asv\u016fj\u2018 provoz od \u201aciz\u00edho\u2018. V d\u016fsledku toho byla rychlost p\u0159enosu dat v bytov\u00fdch domech relativn\u011b n\u00edzk\u00e1, proto\u017ee sm\u011brova\u010de, zachycuj\u00edc\u00ed ciz\u00ed sign\u00e1ly, \u201amyslely\u2018, \u017ee je kan\u00e1l p\u0159et\u00ed\u017een\u00fd. WiFi 6 tento probl\u00e9m \u0159e\u0161\u00ed d\u00edky funkci BSS Coloring, kter\u00e1 umo\u017e\u0148uje rozpoznat \u201asv\u00e9\u2018 a \u201aciz\u00ed\u2018. Datov\u00e9 pakety jsou podeps\u00e1ny digit\u00e1ln\u00edm podpisem, tak\u017ee nedoch\u00e1z\u00ed k \u017e\u00e1dn\u00e9 z\u00e1m\u011bn\u011b.<\/p>\n

Zv\u00fd\u0161en\u00e1 rychlost<\/b><\/p>\n

Roste. Maxim\u00e1ln\u00ed propustnost komunika\u010dn\u00edho kan\u00e1lu dosahuje 11 Gb\/s. To je mo\u017en\u00e9 nejen d\u00edky v\u0161emu, co bylo pops\u00e1no v\u00fd\u0161e, ale tak\u00e9 efektivn\u00edmu kompresi dat. Nov\u00e9 \u010dipy bezdr\u00e1tov\u00e9 komunikace jsou v\u00fdkonn\u011bj\u0161\u00ed, tak\u017ee k\u00f3dov\u00e1n\u00ed a dek\u00f3dov\u00e1n\u00ed prob\u00edh\u00e1 rychleji ne\u017e d\u0159\u00edve.<\/p>\n

N\u00e1r\u016fst rychlosti je v\u00fdznamn\u00fd. Nap\u0159\u00edklad ji\u017e na startu t\u00e9to technologie redakce PCMag ve sv\u00e9 budov\u011b s obrovsk\u00fdm mno\u017estv\u00edm r\u016fzn\u00fdch chytr\u00fdch za\u0159\u00edzen\u00ed, chytr\u00fdch telefon\u016f a p\u0159\u00edstupov\u00fdch bod\u016f dok\u00e1zala dos\u00e1hnout zv\u00fd\u0161en\u00ed rychlosti a\u017e o 50 %, pou\u017e\u00edv\u00e1n\u00edm r\u016fzn\u00fdch sm\u011brova\u010d\u016f.<\/p>\n

\"Wi-Fi
\n\"Wi-Fi
\nNa CNETu dok\u00e1zali zv\u00fd\u0161it rychlost ze 938 Mbit\/s na 1523!<\/p>\n

\"Wi-Fi
\nZv\u00fd\u0161en\u00ed doby autonomn\u00edho provozu za\u0159\u00edzen\u00ed<\/b><\/p>\n

\u0158e\u010d je o notebooc\u00edch, tabletech a smartphonech. WiFi 6 m\u00e1 funkci probuzen\u00ed na po\u017e\u00e1d\u00e1n\u00ed, Target Wake Time (TWT). Za\u0159\u00edzen\u00ed, kter\u00e1 tuto funkci podporuj\u00ed, mohou fungovat v\u00fdrazn\u011b d\u00e9le ne\u017e ta, kter\u00e1 nejsou kompatibiln\u00ed s nov\u00fdm standardem.<\/p>\n

Jde o to, \u017ee p\u0159i ka\u017ed\u00e9m osloven\u00ed za\u0159\u00edzen\u00ed je nastaven \u010dasov\u00fd \u00fasek, po kter\u00e9m se aktivuje WiFi modul gadgetu, nebo se naopak p\u0159evede do sp\u00e1nkov\u00e9ho re\u017eimu.<\/p>\n

A kdy lze vyu\u017e\u00edt v\u00fdhod WiFi 6?<\/h3>\n

\nV podstat\u011b u\u017e nyn\u00ed, ale existuje n\u011bkolik omezen\u00ed. Za prv\u00e9, nen\u00ed tolik router\u016f, kter\u00e9 tento standard podporuj\u00ed, i kdy\u017e se jejich po\u010det zvy\u0161uje. Za druh\u00e9, m\u00e1lo router\u016f, bezdr\u00e1tov\u00e9 p\u0159ipojen\u00ed \u0161est\u00e9 generace by m\u011blo podporovat tak\u00e9 za\u0159\u00edzen\u00ed p\u0159ipojuj\u00edc\u00ed se k p\u0159\u00edstupov\u00e9mu bodu. A krom\u011b toho, kan\u00e1l komunikace \u201eposkytovatel-router\u201c by tak\u00e9 m\u011bl b\u00fdt relativn\u011b rychl\u00fd, jinak nic dobr\u00e9ho nevznikne.<\/p>\n

Odpov\u00eddaj\u00edc na ot\u00e1zku polo\u017eenou v titulku, odpov\u00edme, \u017ee ano, WiFi 6 je pot\u0159eba oby\u010dejn\u00e9mu u\u017eivateli, nov\u00fd standard v\u00fdrazn\u011b usnadn\u00ed \u017eivot n\u00e1m v\u0161em, jak v pr\u00e1ci, tak v dom\u00e1cnosti. Stabiln\u00ed a rychl\u00e9 p\u0159ipojen\u00ed, kter\u00e9 \u0161etrn\u011b vyu\u017e\u00edv\u00e1 baterii notebooku nebo smartphonu \u2013 co v\u00edc pro \u0161t\u011bst\u00ed pot\u0159ebujeme?<\/p>\n

A co m\u00e1 Zyxel?<\/h3>\n

\nSpole\u010dnost Zyxel, jdouc\u00ed s dobou, p\u0159edstavila t\u0159i nov\u00e9 p\u0159\u00edstupov\u00e9 body business t\u0159\u00eddy 802.11ax. Skv\u011ble budou fungovat jak v bytech, tak v kancel\u00e1\u0159\u00edch. Nov\u00e1 za\u0159\u00edzen\u00ed zvy\u0161uj\u00ed \u0161\u00ed\u0159ku p\u00e1sma bezdr\u00e1tov\u00e9 s\u00edt\u011b a\u017e \u0161estkr\u00e1t, i za podm\u00ednek vysok\u00e9 hustoty klient\u016f. P\u0159ipojen\u00ed je stabiln\u00ed a zpo\u017ed\u011bn\u00ed p\u0159enosu dat a ztr\u00e1ty paket\u016f klesaj\u00ed na minimum.<\/p>\n

Pokud jde o samotn\u00e1 za\u0159\u00edzen\u00ed, to jsou:<\/p>\n