{"id":295,"date":"2018-05-18T11:22:07","date_gmt":"2018-05-18T09:22:07","guid":{"rendered":"http:\/\/80.211.198.217\/?p=295"},"modified":"2020-11-19T20:52:54","modified_gmt":"2020-11-19T19:52:54","slug":"lte-predkosc","status":"publish","type":"post","link":"https:\/\/krystiankozak.pl\/index.php\/lte-predkosc\/","title":{"rendered":"LTE: Czy cz\u0119stotliwo\u015b\u0107 transmisji wp\u0142ywa na pr\u0119dko\u015b\u0107 internetu?"},"content":{"rendered":"
Ten kr\u00f3tki test ma na celu sprawdzenie czy mo\u017cna uzyska\u0107 wi\u0119ksz\u0105 pr\u0119dko\u015b\u0107 internetu wymuszaj\u0105c konkretn\u0105 cz\u0119stotliwo\u015b\u0107 w stosunku do tej wybieranej automatycznie przez modem.<\/h6>\n

To kr\u00f3tkie, og\u00f3lnikowe do\u015bwiadczenie ma na celu zweryfikowanie czy przeci\u0119tny Kowalski ma mo\u017cliwo\u015b\u0107 w \u0142atwy spos\u00f3b poprawienia transfer\u00f3w. Pod lup\u0119 wzi\u0105\u0142em cz\u0119stotliwo\u015b\u0107 transmisji na kt\u00f3rej jest zestawiane po\u0142\u0105czenie. W tym celu wykorzysta\u0142em modem Huawei E3276<\/a> na USB. Modem ten jest w wersji HiLink co oznacza \u017ce zarz\u0105dzanie nim odbywa si\u0119 w pe\u0142ni przez panel webowy. Nast\u0119pnie przeszed\u0142em do test\u00f3w.<\/p>\n

Pomiar pierwszy oraz ostatni jest pomiarem kontrolnym wykonanym na cz\u0119stotliwo\u015bci automatycznie wybranej przez modem. Ka\u017cdy z pomiar\u00f3w zosta\u0142 powt\u00f3rzony dwukrotnie.<\/p>\n

\n\n\n\n\t\n\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t
Cz\u0119stotliwo\u015b\u0107:<\/th>Download (Mbps):<\/th>Upload (Mbps):<\/th>Op\u00f3\u017anienie (ms):<\/th>\n<\/tr>\n<\/thead>\n
Automatyczna (1)<\/td>18,15 <\/td>7,77 <\/td>35 <\/td>\n<\/tr>\n
Automatyczna (2)<\/td>17,01 <\/td>7,18 <\/td>28 <\/td>\n<\/tr>\n
UMTS \u2013 900 MHz (1)<\/td>3,44 <\/td>4,03 <\/td>29 <\/td>\n<\/tr>\n
UMTS \u2013 900 MHz (2)<\/td>2,98 <\/td>3,58<\/td>29 <\/td>\n<\/tr>\n
UMTS \u2013 2100 MHz (1)<\/td>3,46 <\/td>3,97<\/td>39 <\/td>\n<\/tr>\n
UMTS \u2013 2100 MHz (2)<\/td>4,03 <\/td>4,03<\/td>34 <\/td>\n<\/tr>\n
LTE \u2013 800 MHz (1)<\/td>14,14 <\/td>17,18<\/td>19 <\/td>\n<\/tr>\n
LTE \u2013 800 MHz (2)<\/td>15,11 <\/td>15,32<\/td>19 <\/td>\n<\/tr>\n
LTE \u2013 2600 MHz (1)<\/td>19,44 <\/td>7,42<\/td>32 <\/td>\n<\/tr>\n
LTE \u2013 2600 MHz (2)<\/td>17,00 <\/td>8,07<\/td>32 <\/td>\n<\/tr>\n
Automatyczna (3)<\/td>20,10 <\/td>7,50<\/td>32 <\/td>\n<\/tr>\n
Automatyczna (4)<\/td>13,22 <\/td>7,44<\/td>30 <\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/p>\n

Podczas pomiar\u00f3w zosta\u0142y sprawdzone wszystkie cz\u0119stotliwo\u015bci oferowane przez najbli\u017cszy nadajnik. Pomiary zosta\u0142y wykonane na przestrzeni 30 minut.<\/p>\n

Na pocz\u0105tku oraz na ko\u0144cu pomiar\u00f3w zosta\u0142y wykonane badania kontrolne maj\u0105ce na celu przedstawienie zmian w transferach ze wzgl\u0119du na warunki zewn\u0119trzne oraz obci\u0105\u017cenie nadajnika.<\/p>\n

Modem w trybie automatycznym wybiera t\u0105 cz\u0119stotliwo\u015b\u0107, kt\u00f3ra akurat ma najmocniejszy sygna\u0142 z naciskiem na t\u0105 w technologii LTE. Jak pokazuje tabela modem w trybie automatycznym wybra\u0142 cz\u0119stotliwo\u015b\u0107 LTE 2600 MHz. Jest to popularna cz\u0119stotliwo\u015b\u0107, kt\u00f3ra jest obs\u0142ugiwana przez wi\u0119kszo\u015b\u0107 urz\u0105dze\u0144 a przez to najbardziej obci\u0105\u017cona.<\/p>\n

Je\u017celi chodzi o por\u00f3wnanie \u0142\u0105czno\u015bci w standardzie UMTS w cz\u0119stotliwo\u015bciach 900 MHz oraz 2100 MHz r\u00f3\u017cnica w transferach jest na poziomie b\u0142\u0119du pomiarowego, lecz kiedy spojrzymy na kolumn\u0119 pokazuj\u0105c\u0105 op\u00f3\u017anienie wida\u0107 \u017ce parametr ten jest zdecydowanie mniejszy na cz\u0119stotliwo\u015bci 900 MHz. Wed\u0142ug mnie jest to spowodowane mniejszym obci\u0105\u017ceniem nadajnika, gdy\u017c zasi\u0119g by\u0142 identyczny co oznacza \u017ce zalety wynikaj\u0105ce z wykorzystania pasma niskich cz\u0119stotliwo\u015bci nie mia\u0142y tutaj du\u017cego wp\u0142ywu.<\/p>\n

Por\u00f3wnuj\u0105c cz\u0119stotliwo\u015b\u0107 w technologii LTE, tzn. B20 800 MHz op\u00f3\u017anienie spad\u0142o do poziomu 19 ms a pr\u0119dko\u015b\u0107 wysy\u0142ania wzros\u0142a dwukrotnie w stosunku do LTE 2600 MHz. Co oznacza \u017ce nie zawsze cz\u0119stotliwo\u015b\u0107 wybierana automatycznie przez modem jest t\u0105 najlepsz\u0105.<\/p>\n

Warto sprawdzi\u0107 jakie cz\u0119stotliwo\u015bci obs\u0142uguje nadajnik i wybra\u0107 t\u0105, kt\u00f3ra oferuje najlepsze parametry. Z regu\u0142y cz\u0119stotliwo\u015b\u0107 wybierana automatycznie przez modem pokrywa si\u0119 z t\u0105 najlepsz\u0105, lecz jak wida\u0107 nie zawsze tak jest.<\/p>\n

Konfiguracja, gdzie takie testy mo\u017cna przeprowadzi\u0107:<\/strong>
\nOpenWrt: Router LTE w oparciu o Raspberry Pi<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Ten kr\u00f3tki test ma na celu sprawdzenie czy mo\u017cna uzyska\u0107 wi\u0119ksz\u0105 pr\u0119dko\u015b\u0107 internetu wymuszaj\u0105c konkretn\u0105 cz\u0119stotliwo\u015b\u0107 w stosunku do tej wybieranej automatycznie przez modem.<\/p>\n","protected":false},"author":1,"featured_media":313,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"footnotes":""},"categories":[129],"tags":[118,116,115,119,114,126,84,123,125,17,121,124,113,120,122,286,127,117,287],"class_list":["post-295","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-testy","tag-118","tag-116","tag-115","tag-119","tag-b20","tag-czestotliwosc","tag-hsdpa","tag-internet","tag-jaka","tag-lte","tag-mhz","tag-mobilny","tag-modem","tag-nadajnik","tag-predkosc","tag-test","tag-testy","tag-umts","tag-wplyw"],"yoast_head":"\nLTE: Czy cz\u0119stotliwo\u015b\u0107 transmisji wp\u0142ywa na 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