{"id":52137,"date":"2019-11-01T00:00:00","date_gmt":"2019-10-31T21:00:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/blog_prohoster\/nb-iot-kak-on-rabotaet-chast-2"},"modified":"2020-02-18T13:59:48","modified_gmt":"2020-02-18T10:59:48","slug":"nb-iot-kak-on-rabotaet-chast-2","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/administrirovanie\/nb-iot-kak-on-rabotaet-chast-2","title":{"rendered":"NB-IoT: kuidas see t\u00f6\u00f6tab? Osa 2","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><b>Viimati r\u00e4\u00e4kisime uue NB-IoT standardi ise\u00e4rasustest raadiokatte arhitktuuri vaatenurgast. T\u00e4na arutame, mis on muutunud tuumv\u00f5rgus (Core Network) NB-IoT puhul. Alustame.<br \/>\n<\/b><\/p>\n<p><img decoding=\"async\" alt=\"NB-IoT: kuidas see t\u00f6\u00f6tab? Osa 2\" src=\"\/wp-content\/uploads\/2019\/11\/ef0e9fab23936e8ba104f65a7440a487.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nTuumv\u00f5rgus on toimunud m\u00e4rkimisv\u00e4\u00e4rsed muudatused. Esiteks, on lisandunud uus element ja mitmed mehhanismid, mida standard kutsub \u201eCIoT EPS Optimization\u201d ehk tugiv\u00f5rgu optimeerimisele mobiilse asjade interneti jaoks. <\/p>\n<p>Nagu teada, on mobiilsetes v\u00f5rkudes kaks peamist kommunikatsioonikanalit, mida nimetatakse Control Plane (CP) ja User Plane (UP). Control Plane on m\u00f5eldud erinevate v\u00f5rguelementide vaheliste teenuseteate edastamiseks ning teenindab seadmete (UE) liikuvuse haldamist (Mobility management) ja andmeedastussessiooni (Session Management) loomist\/s\u00e4ilitamist. User Plane on tegelikult kasutajate liikluse edastamise kanal. Klassikalises LTE-s n\u00e4eb CP ja UP jaotumine liidestel v\u00e4lja j\u00e4rgmiselt:<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><\/p>\n<p><img decoding=\"async\" alt=\"NB-IoT: kuidas see t\u00f6\u00f6tab? Osa 2\" src=\"\/wp-content\/uploads\/2019\/11\/b252f5ac8a9b744f82d3f81cd659de8f.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nNB-IoT jaoks rakendatakse CP ja UP optimeerimise mehhanisme MME, SGW ja PGW s\u00f5lmedes, mis on tinglikult \u00fchendatud \u00fche elemendi alla nimega C-SGN (Cellular IoT Serving Gateway Node). Samuti eeldab standard uue v\u00f5rguelemendi loomist \u2014 SCEF (Service Capability Exposure Function). Liides MME ja SCEF vahel nimetatakse T6a ja see on rakendatud DIAMETER protokolli alusel. Kuigi DIAMETER on signaalimise protokoll, on see NB-IoT-s kohandatud v\u00e4ikeste non-IP andmete edastamiseks.<\/p>\n<p><img decoding=\"async\" alt=\"NB-IoT: kuidas see t\u00f6\u00f6tab? Osa 2\" src=\"\/wp-content\/uploads\/2019\/11\/5f2b191d925485b5c841018bda52d9b5.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nNime j\u00e4rgi on SCEF teenuse v\u00f5imaluste eksponeerimise s\u00f5lm. Teisis\u00f5nu, SCEF varjab operaatori v\u00f5rgu keerukust ning vabastab rakenduste arendajad mobiilsete seadmete (UE) identifitseerimise ja autentimise vajadusest, v\u00f5imaldades rakenduste serveritel (Application Server, edaspidi AS) andmeid hankida ja seadmeid hallata \u00fchise API liidese kaudu. <\/p>\n<p>UE identifikaatoriks ei ole enam telefoninumber (MSISDN) v\u00f5i IP-aadress, nagu oli klassikalistes 2G\/3G\/LTE v\u00f5rkudes, vaid nn \u201eexternal ID\u201c, mis on m\u00e4\u00e4ratletud standardis rakenduste arendajatele tuttavas formaadis \u201e@\u201c. See on eraldi ulatuslik teema, mis v\u00e4\u00e4rib eraldi materjali, seega sellest arutame praegu l\u00e4hemalt. <\/p>\n<p>N\u00fc\u00fcd vaatame l\u00e4hemalt m\u00f5ningaid t\u00e4htsamaid uuendusi. \u00abCIoT EPS Optimization\u00bb on liiklus\u00fclekande ja abonendiseansside haldamise mehhanismide optimeerimine. Siin on peamised neist:<\/p>\n<ul>\n<li>DoNAS <\/li>\n<li>NIDD <\/li>\n<li>Energi s\u00e4\u00e4stmise mehhanismid PSM ja eDRX<\/li>\n<li>HLCOM<\/li>\n<\/ul>\n<p>\n<b>DoNAS (Data over NAS):<\/b><\/p>\n<p>See on mehhanism, mis on v\u00e4lja t\u00f6\u00f6tatud v\u00e4ikeste andmemahtude edastamise optimeerimiseks. <\/p>\n<p>Klassikalises LTE-s loob abonendi seade v\u00f5rgus registreerimisel PDN-\u00fchenduse (edaspidi PDN) l\u00e4bi eNodeB MME-SGW-PGW. UE-eNodeB-MME \u00fchendus on nn \"Signaling Radio Bearer\" (SRB). Kui on vajalik andmete edastamine\/saamine, loob UE veel \u00fche \u00fchenduse eNodeB-ga \u2014 \"Data Radio Bearer\" (DRB), et edastada kasutajateavet SGW-le ja sealt edasi PGW-le (liidesed S1-U ja S5 vastavalt). P\u00e4rast andmevahetuse l\u00f5ppu ja kui teatud aja jooksul (tavaliselt 5-20 sekundit) ei toimu liiklust, katkestatakse need \u00fchendused ja seade l\u00e4heb oote- v\u00f5i \"Idle Mode\" re\u017eiimi. Vajadusel uus andmevahetus SRB ja DRB taastatakse.<\/p>\n<p>NB-IoT-s saavad kasutajateaved edastada signaalikanali (SRB) kaudu NAS-protokolli s\u00f5numites (<noindex><a rel=\"nofollow\" href=\"http:\/\/www.3gpp.org\/more\/96-nas\">http:\/\/www.3gpp.org\/more\/96-nas<\/a><\/noindex>). DRB loomine ei ole enam vajalik. See v\u00e4hendab oluliselt signalisatsioonikoormust, s\u00e4\u00e4stab v\u00f5rgu raadioressursse ja, mis k\u00f5ige t\u00e4htsam \u2014 pikendab seadme aku eluiga. <\/p>\n<p>eNodeB \u2014 MME osas algab kasutajateave edastus S1-MME liidese kaudu, mida klassikalises LTE-tehnoloogias ei olnud, ja selleks kasutatakse NAS-protokolli, milles ilmub \"User data container\".<\/p>\n<p><img decoding=\"async\" alt=\"NB-IoT: kuidas see t\u00f6\u00f6tab? Osa 2\" src=\"\/wp-content\/uploads\/2019\/11\/aa2ea680deac42cca298036d7e1fbb30.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nKasutajateabe \"User Plane\" edastamiseks MME-st SGW-le tekib uus liides S11-U, mis on m\u00f5eldud v\u00e4ikeste kasutajateabe edastamiseks. S11-U protokoll p\u00f5hineb GTP-U v1-l, mida kasutatakse User Plane edastamiseks ka teistes 3GPP-architekti v\u00f5rguliidetes.<br \/>\n<img decoding=\"async\" alt=\"NB-IoT: kuidas see t\u00f6\u00f6tab? Osa 2\" src=\"\/wp-content\/uploads\/2019\/11\/0a295d230c8f0c1858c7eaf278ea472a.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<b>NIDD (non-IP data delivery):<\/b><\/p>\n<p>Edasiarengu k\u00e4igus andmete edastamise mehhanismide optimeerimisel on olemasolevatele PDN t\u00fc\u00fcpidele, nagu IPv4, IPv6 ja IPv4v6, lisatud veel \u00fcks t\u00fc\u00fcp \u2014 non-IP. Sellisel juhul ei m\u00e4\u00e4rata UE-le IP-aadressi ja andmeid edastatakse ilma IP-protokolli kasutamiseta. Sellel on mitu p\u00f5hjust:<\/p>\n<ol>\n<li>IoT-seadmed, nagu sensorid, saavad edastada v\u00e4ga v\u00e4ikeseid andmemahtusid, 20 bait ja isegi v\u00e4hem. Arvestades, et IP-pealkirja minimaalne suurus on 20 bait, v\u00f5ib IP-sisaldus olla m\u00f5nikord piisavalt kallis;<\/li>\n<li>IP-steigi rakendamine kiibis ei ole vajalik, mis v\u00e4hendab nende maksumust (k\u00fcsimus arutamiseks kommentaarides).<\/li>\n<\/ol>\n<p>\nLaias laastus on IP-aadress IoT-seadmete jaoks vajalik, et edastada andmeid l\u00e4bi internetsi. NB-IoT kontseptsioonis toimib SCEF kui ainsana \u00fchenduse punkt AS-ile, ning andmevahetus seadmete ja rakendusserverite vahel toimub API kaudu. Kui SCEF pole olemas, v\u00f5ivad non-IP andmed AS-ile edastada Point-to-Point (PtP) tunnel PGW-st ning IP-sisaldus tehakse siis juba seal.<\/p>\n<p>K\u00f5ik see sobitub NB-IoT paradigmasse \u2014 seadmete maksimaalne lihtsustamine ja odavdamine.<\/p>\n<p><b>Energiat\u00f5hususe mehhanismid PSM ja eDRX:<\/b><\/p>\n<p>\u00dcks LPWAN-v\u00f5rkude p\u00f5hieeliseid on energiakasutuse efektiivsus. \u00dchenduste kohaselt v\u00f5ib seadme aku kesta kuni 10 aastat. Vaatame, kuidas sellised n\u00e4itajad saavutatakse. <\/p>\n<p>Millal seade tarbib k\u00f5ige v\u00e4hem energiat? \u00d5ige, kui see on v\u00e4lja l\u00fclitatud. Ja kui seadet ei saa t\u00e4ielikult v\u00e4lja l\u00fclitada, l\u00fclitame v\u00e4lja raadiosaatja, tantud ajaks, kui vajadust selle j\u00e4rele ei ole. Ainult tuleb eelnevalt see v\u00f5rgu poolt koosk\u00f5lastada.<\/p>\n<p> <b>PSM (energiat\u00f5husa re\u017eiim):<\/b><\/p>\n<p>Energiat\u00f5husa re\u017eiim PSM lubab seadmel pikka aega raadiosaatjat v\u00e4lja l\u00fclitada, j\u00e4\u00e4des samas v\u00f5rku registreerituks, ja mitte IGAL KORRAL uue PDN-i seadistamiseks, kui andmeid edastama peab. <\/p>\n<p>Kuna v\u00f5rgu teadmiseks, et seade on endiselt juurdep\u00e4\u00e4setav, algatab see perioodiliselt ajakohastamisprotseduuri \u2014 Tracking Area Update (TAU). Selle protseduuri sagedus seatakse v\u00f5rgu poolt T3412 ajastiga, mille v\u00e4\u00e4rtus edastatakse seadmele Tikkimismeetodi v\u00f5i j\u00e4rgmise TAU protseduuri k\u00e4igus. Klassikalises LTE on selle ajas\u00e4tted vaikimisi 54 minutit, ning maksimaalne \u2014 186 minutit. Siiski on k\u00f5rge efektiivsuse tagamiseks liiga kallis vajadus raadiolainetesse siseneda iga 186 minuti tagant. Selle probleemi lahendamiseks t\u00f6\u00f6tati v\u00e4lja PSM mehhanism.<\/p>\n<p>Seade aktiveerib PSM-re\u017eiimi, edastades \u00abAttach Request\u00bb v\u00f5i \u00abTracking Area Request\u00bb s\u00f5numites kaks taimerit T3324 ja T3412-Extended. Esimene m\u00e4\u00e4rab aja, mille jooksul seade on p\u00e4rast \u00abIdle Mode\u00bb re\u017eiimini \u00fcleminekut saadaval. Teine on aeg, mille jooksul tuleks teostada TAU, kuid n\u00fc\u00fcd v\u00f5ib selle v\u00e4\u00e4rtus ulatuda 35712000 sekundini ehk 413 p\u00e4evani. S\u00f5ltuvalt seadistustest v\u00f5ib MME vastu v\u00f5tta seadme edastatud taimerite v\u00e4\u00e4rtusi v\u00f5i neid muuta, edastades uued v\u00e4\u00e4rtused s\u00f5numites \u00abAttach Accept\u00bb v\u00f5i \u00abTracking Area Update Accept\u00bb. N\u00fc\u00fcd v\u00f5ib seade olla raadiomooduli sisse l\u00fclitamata 413 p\u00e4eva ja j\u00e4\u00e4da samal ajal v\u00f5rku registreerituks. Selle tulemusena saavutame tohutu v\u00f5rguressursside kokkuhoiu ja seadmete energiat\u00f5hususe!<\/p>\n<p><img decoding=\"async\" alt=\"NB-IoT: kuidas see t\u00f6\u00f6tab? Osa 2\" src=\"\/wp-content\/uploads\/2019\/11\/2ac7fdc892c8b569b5b19a33472c6045.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nKuid sel viisil on seade saadaval ainult sissetulevate kommunikatsioonide jaoks. Kui seade peab edastama midagi rakenduste serverisse, v\u00f5ib see igal ajal PSM-ist v\u00e4lja minna ja andmeid saata, j\u00e4\u00e4des seej\u00e4rel aktiivseks T3324 taimeri jooksul, et vastu v\u00f5tta teabeteateid AS-ilt (kui neid peaks olema).<\/p>\n<p><b>eDRX (pikendatud katkestatud vastuv\u00f5tt):<\/b><\/p>\n<p>eDRX, pikendatud katkestatud vastuv\u00f5tu re\u017eiim. Andmete edastamiseks seadmele, mis asub \u00abIdle mode'is\u00bb, teostab v\u00f5rk teavitamisprotseduuri \u2014 \u00abPaging\u00bb. P\u00e4rast teavitamise saamist k\u00e4ivitab seade SRB loomise edasiseks suhtlemiseks v\u00f5rguga. Kuid et mitte j\u00e4\u00e4da ilma aadressitud s\u00f5numist Paging, peab seade pidevalt j\u00e4lgima raadiolaineid, mis on samuti \u00fcsna energiaintensiivne. <\/p>\n<p>eDRX on re\u017eiim, kus seade vastab v\u00f5rgult s\u00f5numitele mitte pidevalt, vaid perioodiliselt. Attach v\u00f5i TAU protseduuride ajal lepitakse seadme ja v\u00f5rgu vahel kokku ajavahemikud, mille jooksul seade \u00abkuulatab\u00bb eeteret. Vastavalt sellele toimub Paging-protseduur ka nende ajavahemike jooksul. eDRX re\u017eiimis jaguneb seadme t\u00f6\u00f6 ts\u00fckliteks (eDRX ts\u00fckkel). Iga ts\u00fckli alguses toimub nn \u00abpaging-aken\u00bb (Paging Time Window, edaspidi PTW) \u2014 see on aeg, mil seade kuulab raadiokanaleid. PTW l\u00f5ppedes l\u00fclitab seade raadiomooduli ts\u00fckli l\u00f5puni v\u00e4lja.<br \/>\n<img decoding=\"async\" alt=\"NB-IoT: kuidas see t\u00f6\u00f6tab? Osa 2\" src=\"\/wp-content\/uploads\/2019\/11\/924110cbe84765d11efec28238de3dd1.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<b>HLCOM (k\u00f5rge latentsusega kommunikatsioon):<\/b><\/p>\n<p>Vajadusel v\u00f5ib seade andmete edastamiseks v\u00e4ljuda m\u00f5lemast neist kahest energias\u00e4\u00e4sture\u017eiimist, ootamata PSM v\u00f5i eDRX ts\u00fckli l\u00f5ppu. Andmeid saab seadmesse edastada ainult siis, kui see on aktiivne.<\/p>\n<p>HLCOM funktsioon v\u00f5i k\u00f5rge latentsusega suhtlemine t\u00e4hendab Downlink pakettide puhverdamist SGW-s ajaks, mil seade on energias\u00e4\u00e4sture\u017eiimis ja suhtlemiseks mittesaadav. Puhverdatud paketid toimetatakse kohale, kui seade v\u00e4ljub PSM-ist, tehes TAU v\u00f5i edastades Uplink-i liiklust, v\u00f5i kui toimub PTW.<\/p>\n<p>See n\u00f5uab kindlasti IoT-toodete arendajate teadlikkust, kuna seadmega suhtlemine pole reaalajas ning n\u00f5uab teatud l\u00e4henemist rakenduste \u00e4riloogika konstrueerimisel.<\/p>\n<p>Kokkuv\u00f5ttes v\u00f5ib \u00f6elda, et uue rakendamine on alati p\u00f5nev ning praegu tegeleme standardiga, mis pole isegi maailma hiiglaste, nagu Vodafone ja Telefonica, poolt t\u00e4ielikult v\u00e4lja katsetatud \u2013 seega on see kahekordne p\u00f5nevus. Meie esituses ei pretendeeri me absoluutsele t\u00e4ielikkusele, kuid loodame, et see annab piisava arusaama tehnoloogiast. Oleme t\u00e4nulikud tagasiside eest.<\/p>\n<p><i>Autor: Konvergente lahenduste ja multimeedia teenuste ekspert Aleksei Lap\u0161in <noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/users\/aslapsh\/\" class=\"user_link\">aslapsh<\/a><\/noindex><\/i><br \/>\n<br \/>Allikas: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/ru_mts\/blog\/431648\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412 \u043f\u0440\u043e\u0448\u043b\u044b\u0439 \u0440\u0430\u0437 \u043c\u044b \u0433\u043e\u0432\u043e\u0440\u0438\u043b\u0438 \u043e\u0431 \u043e\u0441\u043e\u0431\u0435\u043d\u043d\u043e\u0441\u0442\u044f\u0445 \u043d\u043e\u0432\u043e\u0433\u043e \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442\u0430 NB-IoT \u0441 \u0442\u043e\u0447\u043a\u0438 \u0437\u0440\u0435\u043d\u0438\u044f \u0430\u0440\u0445\u0438\u0442\u0435\u043a\u0442\u0443\u0440\u044b \u0441\u0435\u0442\u0438 \u0440\u0430\u0434\u0438\u043e\u0434\u043e\u0441\u0442\u0443\u043f\u0430. \u0421\u0435\u0433\u043e\u0434\u043d\u044f \u043f\u043e\u0440\u0430\u0441\u0441\u0443\u0436\u0434\u0430\u0435\u043c, \u0447\u0442\u043e \u0438\u0437\u043c\u0435\u043d\u0438\u043b\u043e\u0441\u044c \u0432 \u044f\u0434\u0440\u0435 \u0441\u0435\u0442\u0438 (Core Network) \u043f\u0440\u0438 NB-IoT. \u0418\u0442\u0430\u043a, \u043f\u043e\u0435\u0445\u0430\u043b\u0438. \u0412 \u044f\u0434\u0440\u0435 \u0441\u0435\u0442\u0438 \u043f\u0440\u043e\u0438\u0437\u043e\u0448\u043b\u0438 \u0437\u043d\u0430\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0435 \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u044f. \u041d\u0430\u0447\u043d\u0435\u043c \u0441 \u0442\u043e\u0433\u043e, \u0447\u0442\u043e \u043f\u043e\u044f\u0432\u0438\u043b\u0441\u044f \u043d\u043e\u0432\u044b\u0439 \u044d\u043b\u0435\u043c\u0435\u043d\u0442, \u0430 \u0442\u0430\u043a\u0436\u0435 \u0440\u044f\u0434 \u043c\u0435\u0445\u0430\u043d\u0438\u0437\u043c\u043e\u0432, \u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u0435\u043d\u044b \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442\u043e\u043c \u043a\u0430\u043a \u201cCIoT EPS Optimization\u201d \u0438\u043b\u0438 \u043e\u043f\u0442\u0438\u043c\u0438\u0437\u0430\u0446\u0438\u0438 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-52137","post","type-post","status-publish","format-standard","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0412 \u043f\u0440\u043e\u0448\u043b\u044b\u0439 \u0440\u0430\u0437 \u043c\u044b \u0433\u043e\u0432\u043e\u0440\u0438\u043b\u0438 \u043e\u0431 \u043e\u0441\u043e\u0431\u0435\u043d\u043d\u043e\u0441\u0442\u044f\u0445 \u043d\u043e\u0432\u043e\u0433\u043e \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442\u0430 NB-IoT \u0441 \u0442\u043e\u0447\u043a\u0438 \u0437\u0440\u0435\u043d\u0438\u044f \u0430\u0440\u0445\u0438\u0442\u0435\u043a\u0442\u0443\u0440\u044b \u0441\u0435\u0442\u0438 \u0440\u0430\u0434\u0438\u043e\u0434\u043e\u0441\u0442\u0443\u043f\u0430. \u0421\u0435\u0433\u043e\u0434\u043d\u044f \u043f\u043e\u0440\u0430\u0441\u0441\u0443\u0436\u0434\u0430\u0435\u043c, \u0447\u0442\u043e \u0438\u0437\u043c\u0435\u043d\u0438\u043b\u043e\u0441\u044c \u0432 \u044f\u0434\u0440\u0435 \u0441\u0435\u0442\u0438 (Core Network) \u043f\u0440\u0438 NB-IoT.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Yuri Gagarin\"\/>\n\t<link rel=\"canonical\" href=\"https:\/\/prohoster.info\/et\/blog\/administrirovanie\/nb-iot-kak-on-rabotaet-chast-2\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 5.0.1.1\" \/>\n\t\t<meta property=\"og:locale\" content=\"et_EE\" \/>\n\t\t<meta property=\"og:site_name\" content=\"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"\ud83e\udd47NB-IoT: \u043a\u0430\u043a \u043e\u043d \u0440\u0430\u0431\u043e\u0442\u0430\u0435\u0442? 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