{"id":2631,"date":"2025-10-02T01:44:45","date_gmt":"2025-10-02T01:44:45","guid":{"rendered":"https:\/\/productionscrews.com\/"},"modified":"2025-10-02T01:44:45","modified_gmt":"2025-10-02T01:44:45","slug":"expert-guide-base-station-installation-secrets-for-flawless-mobile-networks","status":"publish","type":"post","link":"https:\/\/productionscrews.com\/vi\/expert-guide-base-station-installation-secrets-for-flawless-mobile-networks\/","title":{"rendered":"H\u01b0\u1edbng d\u1eabn chuy\u00ean gia: B\u00ed quy\u1ebft l\u1eafp \u0111\u1eb7t tr\u1ea1m c\u01a1 s\u1edf cho m\u1ea1ng di \u0111\u1ed9ng ho\u00e0n h\u1ea3o"},"content":{"rendered":"<h2>H\u01b0\u1edbng D\u1eabn To\u00e0n Di\u1ec7n V\u1ec1 L\u1eafp \u0110\u1eb7t Tr\u1ea1m Di \u0110\u1ed9ng: X\u00e2y D\u1ef1ng M\u1ea1ng Di \u0110\u1ed9ng T\u1ed1t H\u01a1n<\/h2>\n<h2>T\u1ea1i Sao Vi\u1ec7c \u0110\u00fang \u0110\u1eafn L\u1ea1i Quan Tr\u1ecdng<\/h2>\n<p>L\u1eafp \u0111\u1eb7t tr\u1ea1m di \u0111\u1ed9ng \u0111\u00fang c\u00e1ch l\u00e0 \u0111i\u1ec1u c\u1ef1c k\u1ef3 c\u1ea7n thi\u1ebft \u0111\u1ec3 t\u1ea1o ra m\u1ed9t m\u1ea1ng di \u0111\u1ed9ng m\u1ea1nh m\u1ebd, \u0111\u00e1ng tin c\u1eady. \u0110\u00e2y l\u00e0 n\u01a1i khoa h\u1ecdc s\u00f3ng radio, k\u1ef9 thu\u1eadt x\u00e2y d\u1ef1ng v\u00e0 m\u1ea1ng m\u00e1y t\u00ednh h\u1ed9i t\u1ee5 t\u1ea1i m\u1ed9t v\u1ecb tr\u00ed v\u1eadt l\u00fd. Ch\u1ec9 m\u1ed9t k\u1ebft n\u1ed1i l\u1ecfng l\u1ebbo, m\u1ed9t t\u1ea3i tr\u1ecdng kh\u00f4ng t\u00ednh to\u00e1n ch\u00ednh x\u00e1c ho\u1eb7c m\u1ed9t anten h\u01b0\u1edbng sai c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m hi\u1ec7u su\u1ea5t c\u1ee7a m\u1ed9t m\u1ea1ng tr\u1ecb gi\u00e1 h\u00e0ng tri\u1ec7u \u0111\u00f4 la v\u00e0 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn h\u00e0ng ngh\u00ecn ng\u01b0\u1eddi d\u00f9ng \u0111i\u1ec7n tho\u1ea1i. \u0110\u00e2y <a href=\"https:\/\/productionscrews.com\/vi\/ultimate-cabinet-fastening-guide-engineering-principles-for-pro-builders\/\"  data-wpil-monitor-id=\"464\" target=\"_blank\">h\u01b0\u1edbng d\u1eabn v\u01b0\u1ee3t ra ngo\u00e0i c\u00e1c h\u01b0\u1edbng d\u1eabn c\u01a1 b\u1ea3n \u0111\u1ec3 cung c\u1ea5p cho k\u1ef9 s\u01b0<\/a> v\u00e0 qu\u1ea3n l\u00fd d\u1ef1 \u00e1n ki\u1ebfn th\u1ee9c k\u1ef9 thu\u1eadt chi ti\u1ebft c\u1ea7n thi\u1ebft cho vi\u1ec7c l\u1eafp \u0111\u1eb7t m\u1ea1ng. N\u00f3 ph\u00e2n t\u00edch c\u00e1c nguy\u00ean t\u1eafc ch\u00ednh gi\u00fap m\u1ed9t c\u00f4ng tr\u00ecnh l\u1eafp \u0111\u1eb7t th\u00e0nh c\u00f4ng.<\/p>\n<p>Ch\u00fang t\u00f4i s\u1ebd xem x\u00e9t c\u1ea9n th\u1eadn c\u00e1c ph\u1ea7n k\u1ef9 thu\u1eadt c\u1ea7n thi\u1ebft \u0111\u1ec3 l\u1eafp \u0111\u1eb7t tr\u1ea1m g\u1ed1c th\u00e0nh c\u00f4ng, bao g\u1ed3m:<\/p>\n<ul>\n<li>C\u00e1c <a href=\"https:\/\/productionscrews.com\/vi\/ultimate-guide-to-dimensional-inspection-from-basic-principles-to-modern-methods\/\"  data-wpil-monitor-id=\"468\" target=\"_blank\">C\u00e1c ph\u1ea7n c\u01a1 b\u1ea3n c\u1ee7a m\u1ed9t<\/a> tr\u1ea1m di \u0111\u1ed9ng hi\u1ec7n \u0111\u1ea1i.<\/li>\n<li>C\u00e1c quy t\u1eafc khoa h\u1ecdc v\u00e0 k\u1ef9 thu\u1eadt \u0111\u1ec3 ch\u1ecdn v\u1ecb tr\u00ed.<\/li>\n<li>So s\u00e1nh c\u00e1c ph\u01b0\u01a1ng ph\u00e1p l\u1eafp \u0111\u1eb7t kh\u00e1c nhau.<\/li>\n<li>Ph\u00e2n t\u00edch t\u1eebng b\u01b0\u1edbc quy tr\u00ecnh l\u1eafp \u0111\u1eb7t v\u1eadt l\u00fd.<\/li>\n<li>C\u00e1c xem x\u00e9t \u0111\u1eb7c bi\u1ec7t cho c\u00e1c thi\u1ebft l\u1eadp m\u1ea1ng 5G.<\/li>\n<li>Giai \u0111o\u1ea1n ki\u1ec3m tra cu\u1ed1i c\u00f9ng v\u00e0 ph\u00ea duy\u1ec7t.<\/li>\n<\/ul>\n<p>H\u01b0\u1edbng d\u1eabn n\u00e0y <a href=\"https:\/\/productionscrews.com\/vi\/color-blending-math-science-technical-guide-for-developers-2025\/\"  data-wpil-monitor-id=\"465\" target=\"_blank\">h\u01b0\u1edbng d\u1eabn \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf nh\u01b0 m\u1ed9t<\/a> ngu\u1ed3n t\u00e0i nguy\u00ean k\u1ef9 thu\u1eadt, cung c\u1ea5p cho b\u1ea1n hi\u1ec3u bi\u1ebft s\u00e2u s\u1eafc c\u1ea7n thi\u1ebft \u0111\u1ec3 ho\u00e0n th\u00e0nh vi\u1ec7c l\u1eafp \u0111\u1eb7t tr\u1ea1m g\u1ed1c v\u1edbi \u0111\u1ed9 ch\u00ednh x\u00e1c y\u00eau c\u1ea7u cho hi\u1ec7u su\u1ea5t m\u1ea1ng t\u1ed1t nh\u1ea5t.<\/p>\n<p><a href=\"https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/pixabay-5267742.jpg\" target=\"_blank\"><img fetchpriority=\"high\" decoding=\"async\" class=\"alignnone size-full wp-image-2635\" src=\"https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/pixabay-5267742.jpg\" alt=\"tr\u1ea1m, thang cu\u1ed1n, \u0111\u00f4 th\u1ecb, thang cu\u1ed1n, thang cu\u1ed1n, thang cu\u1ed1n, thang cu\u1ed1n, thang cu\u1ed1n\" width=\"800\" height=\"1200\" srcset=\"https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/pixabay-5267742.jpg 800w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/pixabay-5267742-200x300.jpg 200w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/pixabay-5267742-768x1152.jpg 768w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/pixabay-5267742-8x12.jpg 8w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/a><\/p>\n<h2>Nh\u1eefng g\u00ec b\u00ean trong m\u1ed9t Tr\u1ea1m Di \u0110\u1ed9ng Hi\u1ec7n \u0110\u1ea1i<\/h2>\n<p>M\u1ed9t tr\u1ea1m di \u0111\u1ed9ng hi\u1ec7n \u0111\u1ea1i kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb l\u1edbn duy nh\u1ea5t m\u00e0 l\u00e0 m\u1ed9t h\u1ec7 th\u1ed1ng c\u00e1c b\u1ed9 ph\u1eadn chuy\u00ean d\u1ee5ng ho\u1ea1t \u0111\u1ed9ng c\u00f9ng nhau. Hi\u1ec3u r\u00f5 ch\u1ee9c n\u0103ng c\u1ee7a t\u1eebng b\u1ed9 ph\u1eadn l\u00e0 \u0111i\u1ec1u quan tr\u1ecdng \u0111\u1ec3 bi\u1ebft c\u00e1ch ch\u00fang ph\u1ee5 thu\u1ed9c l\u1eabn nhau trong qu\u00e1 tr\u00ecnh l\u1eafp \u0111\u1eb7t. H\u1ec7 th\u1ed1ng \u0111\u01b0\u1ee3c chia th\u00e0nh x\u1eed l\u00fd \u1edf c\u1ea5p \u0111\u1ed9 m\u1eb7t \u0111\u1ea5t v\u00e0 truy\u1ec1n s\u00f3ng radio \u1edf \u0111\u1ed9 cao.<\/p>\n<h3>\u0110\u01a1n v\u1ecb c\u01a1 s\u1edf (BBU)<\/h3>\n<p>\u0110\u01a1n v\u1ecb c\u01a1 s\u1edf (BBU) l\u00e0 b\u1ed9 n\u00e3o c\u1ee7a tr\u1ea1m di \u0111\u1ed9ng. Th\u01b0\u1eddng \u0111\u01b0\u1ee3c \u0111\u1eb7t trong m\u1ed9t t\u00f2a nh\u00e0 ho\u1eb7c t\u1ee7 \u0111i\u1ec1u khi\u1ec3n c\u00f3 ki\u1ec3m so\u00e1t kh\u00ed h\u1eadu \u1edf ch\u00e2n tr\u1ee5 ho\u1eb7c trong ph\u00f2ng thi\u1ebft b\u1ecb c\u1ee7a t\u00f2a nh\u00e0, BBU x\u1eed l\u00fd t\u1ea5t c\u1ea3 c\u00e1c x\u1eed l\u00fd t\u00edn hi\u1ec7u k\u1ef9 thu\u1eadt s\u1ed1. N\u00f3 qu\u1ea3n l\u00fd chuy\u1ec3n cu\u1ed9c g\u1ecdi gi\u1eefa c\u00e1c tr\u1ea1m, l\u1eadp l\u1ecbch t\u00e0i nguy\u00ean m\u1ea1ng v\u00e0 giao ti\u1ebfp v\u1edbi m\u1ea1ng ch\u00ednh. N\u00f3 bi\u1ebfn gi\u1ecdng n\u00f3i v\u00e0 d\u1eef li\u1ec7u th\u00e0nh t\u00edn hi\u1ec7u k\u1ef9 thu\u1eadt s\u1ed1 \u0111\u1ec3 truy\u1ec1n v\u00e0 x\u1eed l\u00fd c\u00e1c t\u00edn hi\u1ec7u nh\u1eadn \u0111\u01b0\u1ee3c t\u1eeb \u0111i\u1ec7n tho\u1ea1i ng\u01b0\u1eddi d\u00f9ng. BBU k\u1ebft n\u1ed1i v\u1edbi c\u00e1c \u0111\u01a1n v\u1ecb radio qua c\u00e1p quang t\u1ed1c \u0111\u1ed9 cao.<\/p>\n<h3>\u0110\u01a1n v\u1ecb Radio T\u1eeb xa (RRU\/RRH)<\/h3>\n<p>\u0110\u01a1n v\u1ecb Radio T\u1eeb xa (RRU), c\u00f2n g\u1ecdi l\u00e0 \u0110\u1ea7u Radio T\u1eeb xa (RRH), l\u00e0 \u201cc\u01a1 b\u1eafp\u201d c\u1ee7a h\u1ec7 th\u1ed1ng. C\u00f4ng vi\u1ec7c ch\u00ednh c\u1ee7a n\u00f3 l\u00e0 chuy\u1ec3n \u0111\u1ed5i t\u00edn hi\u1ec7u k\u1ef9 thu\u1eadt s\u1ed1 t\u1eeb BBU th\u00e0nh t\u00edn hi\u1ec7u Radio Frequency (RF) d\u1ea1ng analog, t\u0103ng c\u01b0\u1eddng c\u00f4ng su\u1ea5t c\u1ea7n thi\u1ebft v\u00e0 g\u1eedi \u0111\u1ebfn anten. N\u00f3 c\u0169ng nh\u1eadn c\u00e1c t\u00edn hi\u1ec7u RF y\u1ebfu t\u1eeb anten, khu\u1ebfch \u0111\u1ea1i ch\u00fang v\u00e0 chuy\u1ec3n \u0111\u1ed5i th\u00e0nh d\u1ea1ng k\u1ef9 thu\u1eadt s\u1ed1 \u0111\u1ec3 truy\u1ec1n \u0111\u1ebfn BBU. \u0110\u1eb7t RRU g\u1ea7n anten gi\u00fap gi\u1ea3m chi\u1ec1u d\u00e0i c\u00e1p, t\u1eeb \u0111\u00f3 gi\u1ea3m thi\u1ec3u m\u1ea5t t\u00edn hi\u1ec7u v\u00e0 n\u00e2ng cao hi\u1ec7u qu\u1ea3 h\u1ec7 th\u1ed1ng t\u1ed5ng th\u1ec3, \u0111\u1eb7c bi\u1ec7t l\u00e0 trong vi\u1ec7c nh\u1eadn t\u00edn hi\u1ec7u y\u1ebfu t\u1eeb \u0111i\u1ec7n tho\u1ea1i.<\/p>\n<h3>H\u1ec7 th\u1ed1ng Anten<\/h3>\n<p>H\u1ec7 th\u1ed1ng \u0103ng-ten chuy\u1ec3n \u0111\u1ed5i t\u00edn hi\u1ec7u \u0111i\u1ec7n th\u00e0nh s\u00f3ng v\u00f4 tuy\u1ebfn v\u00e0 ng\u01b0\u1ee3c l\u1ea1i. N\u00f3 l\u00e0 \"mi\u1ec7ng v\u00e0 tai\" c\u1ee7a m\u1ea1ng l\u01b0\u1edbi. \u0102ng-ten d\u1ea1ng t\u1ea5m l\u00e0 ph\u1ed5 bi\u1ebfn nh\u1ea5t trong c\u00e1c m\u1ea1ng di \u0111\u1ed9ng hi\u1ec7n \u0111\u1ea1i, \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 t\u1ea1o ra c\u00e1c v\u00f9ng ph\u1ee7 s\u00f3ng h\u01b0\u1edbng (th\u01b0\u1eddng l\u00e0 ba v\u00f9ng 120 \u0111\u1ed9 m\u1ed7i tr\u1ea1m). C\u00e1c kh\u00e1i ni\u1ec7m ch\u00ednh bao g\u1ed3m ph\u00e2n c\u1ef1c (s\u1eed d\u1ee5ng nhi\u1ec1u h\u01b0\u1edbng \u0111\u1ec3 c\u1ea3i thi\u1ec7n c\u01b0\u1eddng \u0111\u1ed9 t\u00edn hi\u1ec7u), azimuth (h\u01b0\u1edbng ngang), v\u00e0 nghi\u00eang c\u01a1 h\u1ecdc\/\u0111i\u1ec7n (h\u01b0\u1edbng d\u1ecdc). C\u00e1c \u0103ng-ten ti\u00ean ti\u1ebfn h\u1ed7 tr\u1ee3 c\u00f4ng ngh\u1ec7 beamforming, t\u1eadp trung n\u0103ng l\u01b0\u1ee3ng s\u00f3ng v\u00f4 tuy\u1ebfn v\u1ec1 ph\u00eda ng\u01b0\u1eddi d\u00f9ng c\u1ee5 th\u1ec3.<\/p>\n<h3>H\u1ec7 th\u1ed1ng Ngu\u1ed3n v\u00e0 L\u00e0m m\u00e1t<\/h3>\n<p>H\u1ec7 th\u1ed1ng ngu\u1ed3n l\u00e0 huy\u1ebft m\u1ea1ch. C\u00e1c tr\u1ea1m ph\u00e1t s\u00f3ng c\u1ea7n ngu\u1ed3n \u0111i\u1ec7n \u0111\u00e1ng tin c\u1eady, s\u1ea1ch s\u1ebd. Ngu\u1ed3n \u0111i\u1ec7n xoay chi\u1ec1u th\u01b0\u1eddng \u0111\u01b0\u1ee3c chuy\u1ec3n \u0111\u1ed5i th\u00e0nh -48V DC, ti\u00eau chu\u1ea9n cho <a href=\"https:\/\/productionscrews.com\/vi\/expert-guide-telecom-equipment-assembly-secrets-for-perfect-network-performance\/\"  data-wpil-monitor-id=\"461\" target=\"_blank\">thi\u1ebft b\u1ecb vi\u1ec5n th\u00f4ng<\/a>H\u1ec7 th\u1ed1ng ch\u1ec9nh l\u01b0u th\u1ef1c hi\u1ec7n qu\u00e1 tr\u00ecnh chuy\u1ec3n \u0111\u1ed5i n\u00e0y v\u00e0 s\u1ea1c m\u1ed9t ng\u00e2n h\u00e0ng pin. Ngu\u1ed3n \u0111i\u1ec7n d\u1ef1 ph\u00f2ng kh\u00f4ng gi\u00e1n \u0111o\u1ea1n (UPS) n\u00e0y \u0111\u1ea3m b\u1ea3o r\u1eb1ng \u0111\u1ecba \u0111i\u1ec3m v\u1eabn ho\u1ea1t \u0111\u1ed9ng trong th\u1eddi gian m\u1ea5t \u0111i\u1ec7n \u0111\u00e3 \u0111\u1ecbnh. H\u1ec7 th\u1ed1ng l\u00e0m m\u00e1t, th\u00f4ng qua c\u00e1c thi\u1ebft b\u1ecb HVAC ho\u1eb7c qu\u1ea1t c\u00f4ng su\u1ea5t cao, c\u0169ng quan tr\u1ecdng kh\u00f4ng k\u00e9m, v\u00ec BBU v\u00e0 RRU t\u1ea1o ra nhi\u1ec7t l\u01b0\u1ee3ng \u0111\u00e1ng k\u1ec3 c\u1ea7n \u0111\u01b0\u1ee3c lo\u1ea1i b\u1ecf \u0111\u1ec3 tr\u00e1nh h\u1ecfng h\u00f3c thi\u1ebft b\u1ecb.<\/p>\n<h3>Giao di\u1ec7n truy\u1ec1n d\u1eef li\u1ec7u ng\u01b0\u1ee3c<\/h3>\n<p>K\u1ebft n\u1ed1i backhaul cung c\u1ea5p k\u1ebft n\u1ed1i c\u1ee7a tr\u1ea1m v\u1edbi th\u1ebf gi\u1edbi b\u00ean ngo\u00e0i\u2014m\u1ea1ng ch\u00ednh c\u1ee7a nh\u00e0 m\u1ea1ng v\u00e0 internet. C\u00e1p quang dung l\u01b0\u1ee3ng cao \u0111\u01b0\u1ee3c \u01b0u ti\u00ean v\u00ec kh\u1ea3 n\u0103ng truy\u1ec1n d\u1eef li\u1ec7u l\u1edbn, \u0111\u1ed9 tr\u1ec5 th\u1ea5p v\u00e0 \u0111\u1ed9 tin c\u1eady cao. Khi kh\u00f4ng c\u00f3 s\u1eb5n c\u00e1p quang ho\u1eb7c chi ph\u00ed qu\u00e1 cao, c\u00e1c li\u00ean k\u1ebft vi s\u00f3ng t\u1ea7n s\u1ed1 cao \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng, y\u00eau c\u1ea7u c\u0103n ch\u1ec9nh ch\u00ednh x\u00e1c \u0111\u01b0\u1eddng truy\u1ec1n t\u1ea7m nh\u00ecn tr\u1ef1c ti\u1ebfp gi\u1eefa hai anten dish. L\u1ef1a ch\u1ecdn c\u00f4ng ngh\u1ec7 backhaul l\u00e0 quy\u1ebft \u0111\u1ecbnh thi\u1ebft k\u1ebf c\u01a1 b\u1ea3n quy\u1ebft \u0111\u1ecbnh kh\u1ea3 n\u0103ng t\u1ed1c \u0111\u1ed9 d\u1eef li\u1ec7u t\u1ed1i \u0111a c\u1ee7a tr\u1ea1m.<\/p>\n<table>\n<tbody>\n<tr>\n<td width=\"576\"><strong>B\u1ea3ng 1: So s\u00e1nh c\u00e1c ph\u00e2n lo\u1ea1i tr\u1ea1m ph\u00e1t s\u00f3ng<\/strong><\/td>\n<\/tr>\n<tr>\n<td width=\"576\"><strong>Lo\u1ea1i<\/strong><\/td>\n<\/tr>\n<tr>\n<td width=\"576\"><strong>Macrocell<\/strong><\/td>\n<\/tr>\n<tr>\n<td width=\"576\"><strong>Microcell<\/strong><\/td>\n<\/tr>\n<tr>\n<td width=\"576\"><strong>B\u1ed9 ph\u00e1t s\u00f3ng nh\u1ecf<\/strong><\/td>\n<\/tr>\n<tr>\n<td width=\"576\"><strong>Femtocell<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Khoa h\u1ecdc ch\u1ecdn l\u1ef1a \u0111\u1ecba \u0111i\u1ec3m<\/h2>\n<p>Vi\u1ec7c ch\u1ecdn v\u1ecb tr\u00ed \u0111\u1eb7t tr\u1ea1m ph\u00e1t s\u00f3ng l\u00e0 b\u01b0\u1edbc l\u1eadp k\u1ebf ho\u1ea1ch quan tr\u1ecdng nh\u1ea5t trong vi\u1ec7c l\u1eafp \u0111\u1eb7t tr\u1ea1m c\u01a1 s\u1edf. \u0110\u00f3 l\u00e0 m\u1ed9t ng\u00e0nh k\u1ef9 thu\u1eadt d\u1ef1a tr\u00ean v\u1eadt l\u00fd v\u1ec1 c\u00e1ch s\u00f3ng radio truy\u1ec1n t\u1ea3i. V\u1ecb tr\u00ed t\u1ed1t nh\u1ea5t t\u1ed1i \u0111a h\u00f3a v\u00f9ng ph\u1ee7 s\u00f3ng v\u00e0 c\u00f4ng su\u1ea5t trong khi gi\u1ea3m thi\u1ec3u nhi\u1ec5u v\u00e0 chi ph\u00ed. L\u1ef1a ch\u1ecdn k\u00e9m c\u00f3 th\u1ec3 kh\u00f4ng bao gi\u1edd kh\u1eafc ph\u1ee5c ho\u00e0n to\u00e0n \u0111\u01b0\u1ee3c b\u1eb1ng thi\u1ebft b\u1ecb, b\u1ea5t k\u1ec3 ti\u00ean ti\u1ebfn \u0111\u1ebfn \u0111\u00e2u.<\/p>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-2634\" src=\"https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/pixabay-8285732.jpg\" alt=\"tr\u1ea1m ph\u00e1t s\u00f3ng, n\u00fai, anten, \u0111i\u1ec7n tho\u1ea1i di \u0111\u1ed9ng, \u0111i\u1ec7n tho\u1ea1i th\u00f4ng minh, b\u00ecnh th\u01b0\u1eddng, truy\u1ec1n th\u00f4ng, m\u1ea1ng l\u01b0\u1edbi, thi\u00ean nhi\u00ean, m\u00f9a \u0111\u00f4ng, tuy\u1ebft, n\u00fai Hanlla\" width=\"1280\" height=\"853\" srcset=\"https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/pixabay-8285732.jpg 1280w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/pixabay-8285732-300x200.jpg 300w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/pixabay-8285732-768x512.jpg 768w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/pixabay-8285732-18x12.jpg 18w\" sizes=\"(max-width: 1280px) 100vw, 1280px\" \/><\/p>\n<h3>Ph\u00e2n t\u00edch s\u00f3ng v\u00f4 tuy\u1ebfn<\/h3>\n<p>Tia s\u00f3ng radio kh\u00f4ng di chuy\u1ec3n theo \u0111\u01b0\u1eddng th\u1eb3ng \u0111\u01a1n gi\u1ea3n. Ph\u00e2n t\u00edch s\u00f3ng radio s\u1eed d\u1ee5ng c\u00e1c m\u00f4 h\u00ecnh to\u00e1n h\u1ecdc \u0111\u1ec3 d\u1ef1 \u0111o\u00e1n c\u00e1ch t\u00edn hi\u1ec7u s\u1ebd ho\u1ea1t \u0111\u1ed9ng trong m\u00f4i tr\u01b0\u1eddng nh\u1ea5t \u0111\u1ecbnh. C\u00e1c m\u00f4 h\u00ecnh nh\u01b0 Okumura-Hata ho\u1eb7c COST 231 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 l\u1eadp k\u1ebf ho\u1ea1ch m\u1ea1ng l\u01b0\u1edbi l\u1edbn, t\u00ednh \u0111\u1ebfn m\u1eadt \u0111\u1ed9 \u0111\u00f4 th\u1ecb v\u00e0 lo\u1ea1i \u0111\u1ecba h\u00ecnh. C\u00e1c hi\u1ec7n t\u01b0\u1ee3ng ch\u00ednh c\u1ea7n \u0111\u01b0\u1ee3c m\u00f4 h\u00ecnh h\u00f3a bao g\u1ed3m:<\/p>\n<ul>\n<li>M\u1ea5t m\u00e1t \u0111\u01b0\u1eddng truy\u1ec1n: S\u1ef1 gi\u1ea3m s\u00fat t\u1ef1 nhi\u00ean v\u1ec1 c\u01b0\u1eddng \u0111\u1ed9 t\u00edn hi\u1ec7u khi n\u00f3 truy\u1ec1n qua kh\u00f4ng gian.<\/li>\n<li>B\u00f3ng t\u1ed1i: Suy y\u1ebfu t\u00edn hi\u1ec7u do c\u00e1c ch\u01b0\u1edbng ng\u1ea1i v\u1eadt l\u1edbn nh\u01b0 \u0111\u1ed3i ho\u1eb7c t\u00f2a nh\u00e0 g\u00e2y ra.<\/li>\n<li>Suy gi\u1ea3m \u0111a \u0111\u01b0\u1eddng: Hi\u1ec7n t\u01b0\u1ee3ng nhi\u1ec5u lo\u1ea1n ti\u00eau c\u1ef1c v\u00e0 t\u00edch c\u1ef1c khi t\u00edn hi\u1ec7u \u0111\u1ebfn b\u1ed9 thu qua nhi\u1ec1u \u0111\u01b0\u1eddng kh\u00e1c nhau (ph\u1ea3n x\u1ea1, u\u1ed1n quanh v\u1eadt c\u1ea3n).<\/li>\n<\/ul>\n<p>T\u1ea7n s\u1ed1 l\u00e0 y\u1ebfu t\u1ed1 ch\u00ednh. C\u00e1c b\u0103ng t\u1ea7n t\u1ea7n s\u1ed1 th\u1ea5p h\u01a1n (nh\u01b0 700 MHz) \u0111i xa h\u01a1n v\u00e0 xuy\u00ean qua t\u00f2a nh\u00e0 hi\u1ec7u qu\u1ea3 h\u01a1n so v\u1edbi c\u00e1c b\u0103ng t\u1ea7n trung (nh\u01b0 2.5 GHz). C\u00e1c b\u0103ng t\u1ea7n s\u00f3ng millimeter t\u1ea7n s\u1ed1 cao (nh\u01b0 28 GHz) c\u00f3 ph\u1ea1m vi c\u1ef1c k\u1ef3 h\u1ea1n ch\u1ebf v\u00e0 d\u1ec5 b\u1ecb ch\u1eb7n b\u1edfi c\u00e1c v\u1eadt c\u1ea3n.<\/p>\n<h3>T\u00ednh To\u00e1n Ng\u00e2n S\u00e1ch Li\u00ean K\u1ebft<\/h3>\n<p>Ng\u00e2n s\u00e1ch li\u00ean k\u1ebft l\u00e0 m\u1ed9t ph\u00e9p t\u00ednh ch\u00ednh th\u1ee9c v\u1ec1 t\u1ea5t c\u1ea3 c\u00e1c l\u1ee3i \u00edch v\u00e0 t\u1ed5n th\u1ea5t m\u00e0 t\u00edn hi\u1ec7u v\u00f4 tuy\u1ebfn g\u1eb7p ph\u1ea3i khi truy\u1ec1n t\u1eeb m\u00e1y ph\u00e1t \u0111\u1ebfn m\u00e1y thu. M\u1ee5c \u0111\u00edch c\u1ee7a n\u00f3 l\u00e0 \u0111\u1ea3m b\u1ea3o t\u00edn hi\u1ec7u nh\u1eadn \u0111\u01b0\u1ee3c \u0111\u1ee7 m\u1ea1nh \u0111\u1ec3 duy tr\u00ec k\u1ebft n\u1ed1i ch\u1ea5t l\u01b0\u1ee3ng. C\u00f4ng th\u1ee9c \u0111\u01a1n gi\u1ea3n l\u00e0:<\/p>\n<p>C\u00f4ng su\u1ea5t nh\u1eadn = C\u00f4ng su\u1ea5t ph\u00e1t + L\u1ee3i \u00edch \u2013 M\u1ea5t m\u00e1t<\/p>\n<p>M\u1ed7i thu\u1eadt ng\u1eef \u0111\u1ea1i di\u1ec7n cho m\u1ed9t gi\u00e1 tr\u1ecb k\u1ef9 thu\u1eadt quan tr\u1ecdng:<\/p>\n<ul>\n<li>C\u00f4ng su\u1ea5t truy\u1ec1n: C\u00f4ng su\u1ea5t \u0111\u1ea7u ra c\u1ee7a RRU.<\/li>\n<li>L\u1ee3i \u00edch: Ch\u1ee7 y\u1ebfu l\u00e0 \u0111\u1ed9 l\u1ee3i c\u1ee7a anten, t\u1eadp trung n\u0103ng l\u01b0\u1ee3ng s\u00f3ng v\u00f4 tuy\u1ebfn v\u00e0o m\u1ed9t h\u01b0\u1edbng c\u1ee5 th\u1ec3.<\/li>\n<li>M\u1ea5t m\u00e1t: K\u1ebft h\u1ee3p c\u1ee7a M\u1ea5t m\u00e1t \u0110\u01b0\u1eddng truy\u1ec1n Kh\u00f4ng gian T\u1ef1 do (FSPL), m\u1ea5t m\u00e1t do c\u00e1p v\u00e0 k\u1ebft n\u1ed1i, m\u1ea5t m\u00e1t do xuy\u00ean qua v\u1eadt th\u1ec3 (t\u01b0\u1eddng, c\u00e2y), v\u00e0 bi\u00ean \u0111\u1ed9 gi\u1ea3m t\u00edn hi\u1ec7u \u0111\u1ec3 t\u00ednh \u0111\u1ebfn s\u1ef1 thay \u0111\u1ed5i c\u1ee7a t\u00edn hi\u1ec7u.<\/li>\n<\/ul>\n<p>M\u1ed9t bi\u00ean \u0111\u1ed9 li\u00ean k\u1ebft d\u01b0\u01a1ng (c\u00f4ng su\u1ea5t nh\u1eadn v\u01b0\u1ee3t qu\u00e1 \u0111\u1ed9 nh\u1ea1y c\u1ee7a b\u1ed9 thu) l\u00e0 c\u1ea7n thi\u1ebft \u0111\u1ec3 c\u00f3 k\u1ebft n\u1ed1i m\u1ea1nh.<\/p>\n<h3>Tr\u00e1nh nhi\u1ec5u v\u00e0 PIM<\/h3>\n<p>Trong m\u1ed9t m\u1ea1ng l\u01b0\u1edbi d\u00e0y \u0111\u1eb7c, tr\u1ea1m ph\u00e1t s\u00f3ng ph\u1ea3i x\u1eed l\u00fd nhi\u1ec5u t\u1eeb c\u00e1c tr\u1ea1m l\u00e2n c\u1eadn. Nhi\u1ec5u c\u00f9ng t\u1ea7n s\u1ed1 (t\u1eeb c\u00e1c tr\u1ea1m s\u1eed d\u1ee5ng c\u00f9ng t\u1ea7n s\u1ed1) v\u00e0 nhi\u1ec5u k\u1ec1 t\u1ea7n s\u1ed1 (t\u1eeb c\u00e1c tr\u1ea1m tr\u00ean c\u00e1c t\u1ea7n s\u1ed1 l\u00e2n c\u1eadn) ph\u1ea3i \u0111\u01b0\u1ee3c qu\u1ea3n l\u00fd th\u00f4ng qua l\u1eadp k\u1ebf ho\u1ea1ch t\u1ea7n s\u1ed1 c\u1ea9n th\u1eadn v\u00e0 b\u1ed1 tr\u00ed anten ph\u00f9 h\u1ee3p.<\/p>\n<p>M\u1ed9t v\u1ea5n \u0111\u1ec1 \u1ea9n h\u01a1n l\u00e0 T\u01b0\u01a1ng t\u00e1c n\u1ed9i t\u1ea1i th\u1ee5 \u0111\u1ed9ng (PIM). PIM l\u00e0 d\u1ea1ng t\u1ef1 nhi\u1ec5u \u0111\u01b0\u1ee3c t\u1ea1o ra khi hai ho\u1eb7c nhi\u1ec1u t\u00edn hi\u1ec7u v\u00f4 tuy\u1ebfn m\u1ea1nh g\u1eb7p ph\u1ea3i c\u00e1c phi tuy\u1ebfn trong c\u00e1c th\u00e0nh ph\u1ea7n th\u1ee5 \u0111\u1ed9ng nh\u01b0 k\u1ebft n\u1ed1i, c\u00e1p ho\u1eb7c th\u1eadm ch\u00ed kim lo\u1ea1i r\u1ec9 s\u00e9t g\u1ea7n \u0111\u00f3 (h\u00e0ng r\u00e0o, m\u00e1i nh\u00e0). C\u00e1c m\u1ed1i n\u1ed1i phi tuy\u1ebfn n\u00e0y ho\u1ea1t \u0111\u1ed9ng nh\u01b0 b\u1ed9 tr\u1ed9n, t\u1ea1o ra c\u00e1c t\u00edn hi\u1ec7u m\u1edbi, kh\u00f4ng mong mu\u1ed1n c\u00f3 th\u1ec3 r\u01a1i tr\u1ef1c ti\u1ebfp v\u00e0o b\u0103ng t\u1ea7n uplink nh\u1ea1y c\u1ea3m, l\u00e0m t\u0103ng m\u1ee9c nhi\u1ec5u v\u00e0 g\u00e2y \u1ea3nh h\u01b0\u1edfng nghi\u00eam tr\u1ecdng \u0111\u1ebfn ch\u1ea5t l\u01b0\u1ee3ng cu\u1ed9c g\u1ecdi v\u00e0 d\u1eef li\u1ec7u. Vi\u1ec7c ch\u1ecdn v\u1ecb tr\u00ed c\u1ea7n tr\u00e1nh c\u00e1c ngu\u1ed3n PIM ti\u1ec1m n\u0103ng m\u1ed9t c\u00e1ch ch\u1ee7 \u0111\u1ed9ng.<\/p>\n<h3>C\u00e1c y\u1ebfu t\u1ed1 c\u1ea5u tr\u00fac v\u00e0 m\u00f4i tr\u01b0\u1eddng<\/h3>\n<p>V\u1ecb tr\u00ed \u0111\u01b0\u1ee3c ch\u1ecdn ph\u1ea3i c\u00f3 kh\u1ea3 n\u0103ng ch\u1ecbu \u0111\u1ef1ng v\u1eadt l\u00fd cho thi\u1ebft b\u1ecb. C\u1ea7n th\u1ef1c hi\u1ec7n ph\u00e2n t\u00edch k\u1ebft c\u1ea5u \u0111\u1ec3 t\u00ednh to\u00e1n t\u1ed5ng t\u1ea3i tr\u1ecdng, bao g\u1ed3m tr\u1ecdng l\u01b0\u1ee3ng c\u1ee7a c\u00e1c \u0103ng-ten, RRUs, gi\u00e1 \u0111\u1ee1 v\u00e0 c\u00e1p. Quan tr\u1ecdng, ph\u00e2n t\u00edch n\u00e0y c\u0169ng ph\u1ea3i t\u00ednh \u0111\u1ebfn t\u1ea3i gi\u00f3, g\u00e2y ra l\u1ef1c \u0111\u00e1ng k\u1ec3 l\u00ean c\u1ea5u tr\u00fac th\u00e1p ho\u1eb7c t\u00f2a nh\u00e0, \u0111\u1eb7c bi\u1ec7t l\u00e0 tr\u00ean c\u00e1c m\u1ea3ng \u0103ng-ten l\u1edbn. C\u00e1c y\u1ebfu t\u1ed1 m\u00f4i tr\u01b0\u1eddng c\u0169ng \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng. V\u1ecb tr\u00ed ph\u1ea3i \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 v\u1ec1 nguy c\u01a1 s\u00e9t, y\u00eau c\u1ea7u h\u1ec7 th\u1ed1ng ti\u1ebfp \u0111\u1ea5t ch\u1eafc ch\u1eafn v\u00e0 k\u1ebf ho\u1ea1ch ch\u1ed1ng s\u00e9t. Vi\u1ec7c truy c\u1eadp quanh n\u0103m cho c\u00e1c ph\u01b0\u01a1ng ti\u1ec7n b\u1ea3o tr\u00ec, bao g\u1ed3m c\u1ea3 c\u1ea7n c\u1ea9u n\u1ebfu c\u1ea7n thi\u1ebft, l\u00e0 m\u1ed9t y\u00eau c\u1ea7u logistics kh\u00f4ng th\u1ec3 b\u1ecf qua.<\/p>\n<h2>Ph\u00e2n t\u00edch ph\u01b0\u01a1ng ph\u00e1p l\u1eafp \u0111\u1eb7t<\/h2>\n<p>L\u1ef1a ch\u1ecdn ph\u01b0\u01a1ng ph\u00e1p l\u1eafp \u0111\u1eb7t ph\u00f9 h\u1ee3p li\u00ean quan \u0111\u1ebfn m\u1ed9t lo\u1ea1t c\u00e1c \u0111\u00e1nh \u0111\u1ed5i v\u1ec1 k\u1ef9 thu\u1eadt v\u00e0 t\u00e0i ch\u00ednh. L\u1ef1a ch\u1ecdn t\u1ed1t nh\u1ea5t ph\u1ee5 thu\u1ed9c v\u00e0o m\u1ee5c ti\u00eau c\u1ee7a m\u1ea1ng l\u01b0\u1edbi, d\u00f9 l\u00e0 ph\u1ea1m vi ph\u1ee7 s\u00f3ng r\u1ed9ng, c\u00f4ng su\u1ea5t m\u1ee5c ti\u00eau hay kh\u1ea3 n\u0103ng xuy\u00ean indoors. Ch\u00fang t\u00f4i ph\u00e2n t\u00edch ba ph\u01b0\u01a1ng ph\u00e1p ch\u00ednh <a href=\"https:\/\/productionscrews.com\/vi\/7-game-changing-surface-treatment-methods-engineers-use-to-enhance-materials\/\"  data-wpil-monitor-id=\"466\" target=\"_blank\">ph\u01b0\u01a1ng ph\u00e1p tr\u00ean c\u00e1c k\u1ef9 thu\u1eadt ch\u00ednh<\/a> ti\u00eau ch\u00ed<\/p>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-2633\" src=\"https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/unsplash-WS59djS8e34.jpg\" alt=\"m\u1ed9t tr\u1ea1m \u0111i\u1ec7n tho\u1ea1i di \u0111\u1ed9ng c\u1ea1nh m\u1ed9t t\u00f2a nh\u00e0\" width=\"900\" height=\"1200\" srcset=\"https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/unsplash-WS59djS8e34.jpg 900w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/unsplash-WS59djS8e34-225x300.jpg 225w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/unsplash-WS59djS8e34-768x1024.jpg 768w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/unsplash-WS59djS8e34-9x12.jpg 9w\" sizes=\"(max-width: 900px) 100vw, 900px\" \/><\/p>\n<h3>L\u1eafp \u0111\u1eb7t T\u00f2a nh\u00e0 M\u1edbi<\/h3>\n<p>Vi\u1ec7c l\u1eafp \u0111\u1eb7t m\u1edbi li\u00ean quan \u0111\u1ebfn vi\u1ec7c x\u00e2y d\u1ef1ng m\u1ed9t c\u1ed9t m\u1edbi (c\u1ed9t \u0111\u01a1n, t\u1ef1 \u0111\u1ee9ng ho\u1eb7c c\u00f3 c\u1ed9t ch\u1ed1ng) tr\u00ean m\u1ed9t m\u1ea3nh \u0111\u1ea5t ch\u01b0a ph\u00e1t tri\u1ec3n.<\/p>\n<ul>\n<li>Hi\u1ec7u su\u1ea5t Radio: V\u01b0\u1ee3t tr\u1ed9i. Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y cung c\u1ea5p kh\u1ea3 n\u0103ng linh ho\u1ea1t t\u1ed1i \u0111a v\u1ec1 chi\u1ec1u cao v\u00e0 v\u1ecb tr\u00ed, cho ph\u00e9p k\u1ef9 s\u01b0 \u0111\u1eb7t anten t\u1ea1i \u0111i\u1ec3m l\u00fd t\u01b0\u1edfng \u0111\u1ec3 t\u1ed1i \u0111a h\u00f3a v\u00f9ng ph\u1ee7 s\u00f3ng v\u00e0 gi\u1ea3m thi\u1ec3u v\u1eadt c\u1ea3n. \u0110\u00e2y l\u00e0 ti\u00eau chu\u1ea9n cho c\u00e1c tri\u1ec3n khai m\u1ea1ng l\u1edbn \u1edf v\u00f9ng n\u00f4ng th\u00f4n v\u00e0 ngo\u1ea1i \u00f4.<\/li>\n<li>Th\u00e1ch th\u1ee9c C\u01a1 c\u1ea5u: \u0110\u00e1ng k\u1ec3. \u0110\u00e2y l\u00e0 m\u1ed9t d\u1ef1 \u00e1n k\u1ef9 thu\u1eadt d\u00e2n d\u1ee5ng l\u1edbn <a href=\"https:\/\/productionscrews.com\/vi\/ultimate-guide-how-to-choose-the-perfect-rubber-pad-for-your-engineering-project\/\"  data-wpil-monitor-id=\"463\" target=\"_blank\">\u0111\u00f2i h\u1ecfi<\/a>kh\u1ea3o s\u00e1t \u0111\u1ea5t \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh c\u1ee7a m\u1eb7t b\u1eb1ng, n\u1ec1n m\u00f3ng b\u00ea t\u00f4ng l\u1edbn, v\u00e0 qu\u00e1 tr\u00ecnh x\u00e2y d\u1ef1ng th\u00e1p nhi\u1ec1u giai \u0111o\u1ea1n. Th\u1eddi gian tri\u1ec3n khai d\u00e0i nh\u1ea5t, th\u01b0\u1eddng k\u00e9o d\u00e0i v\u00e0i th\u00e1ng.<\/li>\n<li>Ngu\u1ed3n \u0111i\u1ec7n &amp; H\u1ec7 th\u1ed1ng truy\u1ec1n d\u1eef li\u1ec7u ng\u01b0\u1ee3c: Ph\u1ee9c t\u1ea1p v\u00e0 t\u1ed1n k\u00e9m. Ngu\u1ed3n \u0111i\u1ec7n ti\u1ec7n \u00edch v\u00e0 h\u1ec7 th\u1ed1ng truy\u1ec1n d\u1eef li\u1ec7u quang th\u01b0\u1eddng c\u1ea7n \u0111\u01b0\u1ee3c m\u1edf r\u1ed9ng \u0111\u1ebfn \u0111\u1ecba \u0111i\u1ec3m, c\u00f3 th\u1ec3 li\u00ean quan \u0111\u1ebfn \u0111\u00e0o \u0111\u1ea5t, khoan ho\u1eb7c l\u1eafp \u0111\u1eb7t c\u1ed9t ti\u1ec7n \u00edch m\u1edbi, l\u00e0m t\u0103ng chi ph\u00ed v\u00e0 c\u00f4ng t\u00e1c ph\u1ed1i h\u1ee3p.<\/li>\n<\/ul>\n<h3>L\u1eafp \u0111\u1eb7t tr\u00ean m\u00e1i nh\u00e0<\/h3>\n<p>Ph\u01b0\u01a1ng ph\u00e1p ph\u1ed5 bi\u1ebfn trong \u0111\u00f4 th\u1ecb v\u00e0 ngo\u1ea1i \u00f4 n\u00e0y li\u00ean quan \u0111\u1ebfn <a href=\"https:\/\/productionscrews.com\/vi\/expert-guide-antenna-mounting-science-engineering-for-peak-performance\/\"  data-wpil-monitor-id=\"462\" target=\"_blank\">l\u1eafp \u0111\u1eb7t anten<\/a> v\u00e0 thi\u1ebft b\u1ecb tr\u00ean m\u00e1i c\u1ee7a m\u1ed9t t\u00f2a nh\u00e0 hi\u1ec7n c\u00f3.<\/p>\n<ul>\n<li>Hi\u1ec7u su\u1ea5t Radio: R\u1ea5t t\u1ed1t, nh\u01b0ng c\u00f3 gi\u1edbi h\u1ea1n. M\u00e1i nh\u00e0 cung c\u1ea5p chi\u1ec1u cao tuy\u1ec7t v\u1eddi. Tuy nhi\u00ean, hi\u1ec7u su\u1ea5t c\u00f3 th\u1ec3 b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi v\u1eadt c\u1ea3n t\u1eeb c\u00e1c t\u00f2a nh\u00e0 cao h\u01a1n ho\u1eb7c do s\u1ef1 l\u1ed9n x\u1ed9n t\u1eeb c\u00e1c thi\u1ebft b\u1ecb tr\u00ean m\u00e1i nh\u01b0 h\u1ec7 th\u1ed1ng HVAC, g\u00e2y ph\u1ea3n x\u1ea1 v\u00e0 ch\u1eafn t\u00edn hi\u1ec7u. C\u00e1c c\u1ea5u tr\u00fac kim lo\u1ea1i tr\u00ean nhi\u1ec1u m\u00e1i th\u01b0\u01a1ng m\u1ea1i c\u0169ng l\u00e0 ngu\u1ed3n g\u00e2y PIM c\u00f3 nguy c\u01a1 cao.<\/li>\n<li>Th\u00e1ch th\u1ee9c C\u01a1 c\u1ea5u: C\u1ef1c k\u1ef3 quan tr\u1ecdng. M\u1ed9t k\u1ef9 s\u01b0 c\u1ea5u tr\u00fac c\u00f3 gi\u1ea5y ph\u00e9p ph\u1ea3i th\u1ef1c hi\u1ec7n ph\u00e2n t\u00edch chi ti\u1ebft \u0111\u1ec3 x\u00e1c nh\u1eadn m\u00e1i nh\u00e0 c\u00f3 th\u1ec3 ch\u1ecbu \u0111\u01b0\u1ee3c tr\u1ecdng l\u01b0\u1ee3ng k\u1ebft h\u1ee3p v\u00e0 l\u1ef1c gi\u00f3 c\u1ee7a thi\u1ebft b\u1ecb l\u1eafp \u0111\u1eb7t \u0111\u1ec1 xu\u1ea5t. T\u1ea5t c\u1ea3 c\u00e1c l\u1ed7 tr\u00ean m\u00e1i \u0111\u1ec3 \u0111i d\u00e2y v\u00e0 l\u1eafp \u0111\u1eb7t ph\u1ea7n c\u1ee9ng ph\u1ea3i \u0111\u01b0\u1ee3c ni\u00eam phong c\u1ea9n th\u1eadn v\u00e0 ch\u1ed1ng th\u1eddi ti\u1ebft \u0111\u1ec3 ng\u0103n r\u00f2 r\u1ec9 v\u00e0 duy tr\u00ec t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a t\u00f2a nh\u00e0.<\/li>\n<li>Ngu\u1ed3n \u0111i\u1ec7n &amp; H\u1ec7 th\u1ed1ng truy\u1ec1n d\u1eef li\u1ec7u ng\u01b0\u1ee3c: Th\u01b0\u1eddng d\u1ec5 ti\u1ebfp c\u1eadn h\u01a1n. K\u1ebft n\u1ed1i v\u1edbi h\u1ec7 th\u1ed1ng \u0111i\u1ec7n v\u00e0 truy\u1ec1n th\u00f4ng hi\u1ec7n c\u00f3 c\u1ee7a t\u00f2a nh\u00e0 th\u01b0\u1eddng d\u1ec5 h\u01a1n so v\u1edbi x\u00e2y m\u1edbi. Tuy nhi\u00ean, v\u1eabn c\u00f3 th\u1ec3 y\u00eau c\u1ea7u d\u00e2y ngu\u1ed3n c\u00f3 d\u00f2ng \u0111i\u1ec7n cao v\u00e0 h\u1ec7 th\u1ed1ng c\u00e1p quang ph\u1ee9c t\u1ea1p trong t\u00f2a nh\u00e0 t\u1eeb m\u00e1i \u0111\u1ebfn \u0111i\u1ec3m k\u1ebft n\u1ed1i vi\u1ec5n th\u00f4ng c\u1ee7a t\u00f2a nh\u00e0.<\/li>\n<\/ul>\n<h3>Cell nh\u1ecf \/ N\u1ed9i th\u1ea5t \u0111\u01b0\u1eddng ph\u1ed1<\/h3>\n<p>C\u00e1c cell nh\u1ecf l\u00e0 c\u00e1c n\u00fat c\u00f4ng su\u1ea5t th\u1ea5p \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t tr\u00ean \u0111\u00e8n \u0111\u01b0\u1eddng, c\u1ed9t ti\u1ec7n \u00edch ho\u1eb7c b\u00ean c\u1ea1nh c\u00e1c t\u00f2a nh\u00e0 \u0111\u1ec3 b\u1ed5 sung dung l\u01b0\u1ee3ng m\u1ee5c ti\u00eau v\u00e0 l\u1ea5p \u0111\u1ea7y c\u00e1c kho\u1ea3ng tr\u1ed1ng ph\u1ee7 s\u00f3ng.<\/p>\n<ul>\n<li>Hi\u1ec7u su\u1ea5t Radio: R\u1ea5t c\u1ee5c b\u1ed9. Chi\u1ec1u cao l\u1eafp \u0111\u1eb7t th\u1ea5p v\u00e0 m\u1ee9c c\u00f4ng su\u1ea5t th\u1ea5p khi\u1ebfn v\u00f9ng ph\u1ee7 h\u1ea1n ch\u1ebf, th\u01b0\u1eddng ch\u1ec9 trong ph\u1ea1m vi m\u1ed9t block ho\u1eb7c \u00edt h\u01a1n. Hi\u1ec7u su\u1ea5t b\u1ecb \u1ea3nh h\u01b0\u1edfng nhi\u1ec1u b\u1edfi v\u1eadt c\u1ea3n t\u1eeb c\u00e1c ch\u01b0\u1edbng ng\u1ea1i v\u1eadt \u1edf m\u1eb7t \u0111\u01b0\u1eddng nh\u01b0 xe bu\u00fdt, c\u00e2y c\u1ed1i, v\u00e0 c\u1ea3 \u0111\u00e1m \u0111\u00f4ng ng\u01b0\u1eddi \u0111i b\u1ed9. Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y nh\u1eb1m t\u0103ng dung l\u01b0\u1ee3ng, kh\u00f4ng ph\u1ea3i ph\u1ee7 s\u00f3ng di\u1ec7n r\u1ed9ng.<\/li>\n<li>Th\u00e1ch th\u1ee9c C\u01a1 c\u1ea5u: \u0110\u00e1nh l\u1eeba. Trong khi thi\u1ebft b\u1ecb nh\u1ecf h\u01a1n v\u00e0 nh\u1eb9 h\u01a1n, ph\u00e2n t\u00edch kh\u00f4ng k\u00e9m ph\u1ea7n k\u1ef9 l\u01b0\u1ee1ng. C\u1ed9t ti\u1ec7n \u00edch ho\u1eb7c c\u1ea5u tr\u00fac hi\u1ec7n c\u00f3 ph\u1ea3i \u0111\u01b0\u1ee3c ph\u00e2n t\u00edch kh\u1ea3 n\u0103ng ch\u1ecbu l\u1ef1c gi\u00f3 b\u1ed5 sung. Ngo\u1ea1i h\u00ecnh v\u00e0 s\u1ef1 tu\u00e2n th\u1ee7 lu\u1eadt quy ho\u1ea1ch \u0111\u1ecba ph\u01b0\u01a1ng v\u00e0 quy \u0111\u1ecbnh v\u1ec1 quy\u1ec1n \u0111\u01b0\u1eddng c\u00f4ng c\u1ed9ng l\u00e0 c\u00e1c tr\u1edf ng\u1ea1i l\u1edbn c\u1ee7a d\u1ef1 \u00e1n.<\/li>\n<li>Ngu\u1ed3n \u0111i\u1ec7n &amp; H\u1ec7 th\u1ed1ng truy\u1ec1n d\u1eef li\u1ec7u ng\u01b0\u1ee3c: Th\u01b0\u1eddng l\u00e0 th\u00e1ch th\u1ee9c l\u1edbn nh\u1ea5t. T\u00ecm ngu\u1ed3n \u0111i\u1ec7n ph\u00f9 h\u1ee3p c\u00f3 th\u1ec3 li\u00ean quan \u0111\u1ebfn \u0111\u00e0m ph\u00e1n ph\u1ee9c t\u1ea1p \u0111\u1ec3 khai th\u00e1c m\u1ea1ch \u0111i\u1ec7n c\u1ee7a \u0111\u00e8n \u0111\u01b0\u1eddng. \u0110\u1ea3m b\u1ea3o k\u1ebft n\u1ed1i h\u1ec7 th\u1ed1ng c\u00e1p quang \u0111\u1ebfn c\u1ed9t ti\u1ec7n \u00edch gi\u1eefa c\u00e1c khu ph\u1ed1 l\u00e0 m\u1ed9t c\u00f4ng vi\u1ec7c h\u1eadu c\u1ea7n v\u00e0 t\u00e0i ch\u00ednh \u0111\u00e1ng k\u1ec3, \u0111\u00f4i khi t\u1ed1n nhi\u1ec1u h\u01a1n c\u1ea3 thi\u1ebft b\u1ecb radio.<\/li>\n<\/ul>\n<h2>Ph\u00e2n t\u00edch Quy tr\u00ecnh L\u1eafp \u0111\u1eb7t<\/h2>\n<p>Vi\u1ec7c l\u1eafp \u0111\u1eb7t v\u1eadt l\u00fd l\u00e0 m\u1ed9t chu\u1ed7i c\u00e1c h\u00e0nh \u0111\u1ed9ng ch\u00ednh x\u00e1c, trong \u0111\u00f3 vi\u1ec7c tu\u00e2n th\u1ee7 c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m k\u1ef9 thu\u1eadt l\u00e0 c\u1ef1c k\u1ef3 quan tr\u1ecdng. M\u1ed9t sai s\u00f3t \u1edf b\u1ea5t k\u1ef3 b\u01b0\u1edbc n\u00e0o c\u0169ng c\u00f3 th\u1ec3 l\u00e0m \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a to\u00e0n b\u1ed9 h\u1ec7 th\u1ed1ng. Qu\u00e1 tr\u00ecnh n\u00e0y l\u00e0 m\u1ed9t ngh\u1ec1 th\u1ee7 c\u00f4ng d\u1ef1a tr\u00ean b\u1ea3n v\u1ebd k\u1ef9 thu\u1eadt v\u00e0 c\u00e1c th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t.<\/p>\n<h3>1. Chu\u1ea9n b\u1ecb \u0111\u1ecba \u0111i\u1ec3m v\u00e0 An to\u00e0n<\/h3>\n<p>Tr\u01b0\u1edbc khi b\u1ea5t k\u1ef3 thi\u1ebft b\u1ecb n\u00e0o \u0111\u01b0\u1ee3c m\u1edf h\u1ed9p, c\u00f4ng tr\u01b0\u1eddng ph\u1ea3i \u0111\u01b0\u1ee3c chu\u1ea9n b\u1ecb. \u0110i\u1ec1u n\u00e0y b\u1eaft \u0111\u1ea7u b\u1eb1ng vi\u1ec7c thi\u1ebft l\u1eadp khu v\u1ef1c l\u00e0m vi\u1ec7c an to\u00e0n, s\u1eed d\u1ee5ng c\u1ecdc ti\u00eau, b\u0103ng d\u00ednh v\u00e0 bi\u1ec3n b\u00e1o \u0111\u1ec3 ki\u1ec3m so\u00e1t truy c\u1eadp, \u0111\u1eb7c bi\u1ec7t n\u1ebfu d\u1ef1 ki\u1ebfn c\u00f3 c\u00e1c ho\u1ea1t \u0111\u1ed9ng n\u00e2ng. T\u1ea5t c\u1ea3 c\u00e1c th\u00e0nh ph\u1ea7n \u0111\u01b0\u1ee3c giao ph\u1ea3i \u0111\u01b0\u1ee3c ki\u1ec3m tra c\u1ea9n th\u1eadn so v\u1edbi Bill of Materials (BOM) v\u00e0 ki\u1ec3m tra xem c\u00f3 thi\u1ec7t h\u1ea1i trong qu\u00e1 tr\u00ecnh v\u1eadn chuy\u1ec3n hay kh\u00f4ng. M\u1ed9t \u0111\u00e1nh gi\u00e1 r\u1ee7i ro cu\u1ed1i c\u00f9ng t\u1ea1i ch\u1ed7 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh b\u1ea5t k\u1ef3 m\u1ed1i nguy hi\u1ec3m m\u1edbi ho\u1eb7c ch\u01b0a t\u1eebng th\u1ea5y tr\u01b0\u1edbc \u0111\u00f3.<\/p>\n<h3>2. L\u1eafp r\u00e1p c\u1ea5u tr\u00fac v\u00e0 gi\u00e1 \u0111\u1ee1<\/h3>\n<p>Giai \u0111o\u1ea1n n\u00e0y li\u00ean quan \u0111\u1ebfn vi\u1ec7c l\u1eafp r\u00e1p ph\u1ea7n c\u1ee9ng g\u1eafn anten, d\u00f9 l\u00e0 c\u00e1c b\u1ed9 ph\u1eadn ch\u1ed1ng \u0111\u1ee1 th\u00e1p ho\u1eb7c c\u00e1c b\u1ed9 ph\u1eadn tr\u01b0\u1ee3t m\u00e1i nh\u00e0, theo b\u1ea3n v\u1ebd k\u1ef9 thu\u1eadt c\u1ea5u tr\u00fac. \u0110\u00e2y l\u00e0 b\u01b0\u1edbc quan tr\u1ecdng v\u1ec1 an to\u00e0n. T\u1ea5t c\u1ea3 ph\u1ea7n c\u1ee9ng ph\u1ea3i \u0111\u01b0\u1ee3c si\u1ebft ch\u1eb7t theo \u0111\u00fang th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t \u0111\u1ec3 tr\u00e1nh l\u1ecfng l\u1ebbo do rung l\u1eafc g\u00e2y ra b\u1edfi gi\u00f3 theo th\u1eddi gian. M\u1ed9t chi ti\u1ebft quan tr\u1ecdng nh\u01b0ng th\u01b0\u1eddng b\u1ecb b\u1ecf qua l\u00e0 chu\u1ea9n b\u1ecb t\u1ea5t c\u1ea3 c\u00e1c \u0111i\u1ec3m ti\u1ebfp \u0111\u1ea5t v\u00e0 li\u00ean k\u1ebft. \u0110i\u1ec1u n\u00e0y bao g\u1ed3m vi\u1ec7c lo\u1ea1i b\u1ecf s\u01a1n ho\u1eb7c r\u1ec9 s\u00e9t \u0111\u1ec3 t\u1ea1o ra k\u1ebft n\u1ed1i kim lo\u1ea1i v\u1edbi kim lo\u1ea1i tr\u1ea7n v\u00e0 s\u1eed d\u1ee5ng h\u1ee3p ch\u1ea5t ch\u1ed1ng r\u1ec9 tr\u01b0\u1edbc khi l\u1eafp r\u00e1p cu\u1ed1i c\u00f9ng \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o m\u1ed1i li\u00ean k\u1ebft \u0111i\u1ec7n c\u00f3 \u0111i\u1ec7n tr\u1edf th\u1ea5p, b\u1ec1n l\u00e2u.<\/p>\n<h3>3. N\u00e2ng anten v\u00e0 RRU<\/h3>\n<p>N\u00e2ng c\u00e1c anten v\u00e0 RRU n\u1eb7ng v\u00e0 \u0111\u1eaft ti\u1ec1n l\u00ean \u0111\u1ed9 cao \u0111\u00f2i h\u1ecfi thi\u1ebft b\u1ecb n\u00e2ng c\u00f3 ch\u1ee9ng nh\u1eadn v\u00e0 nh\u00e2n vi\u00ean \u0111\u01b0\u1ee3c \u0111\u00e0o t\u1ea1o. M\u1ed9t c\u1ed9t n\u00e2ng ho\u1eb7c c\u1ea7n c\u1ea9u \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng, v\u00e0 lu\u00f4n ph\u1ea3i d\u00f9ng d\u00e2y \u0111eo \u0111\u1ec3 ki\u1ec3m so\u00e1t dao \u0111\u1ed9ng c\u1ee7a t\u1ea3i tr\u1ecdng v\u00e0 tr\u00e1nh va ch\u1ea1m. Sau khi n\u00e2ng, thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t. G\u00f3c ph\u01b0\u01a1ng v\u1ecb c\u1ee7a anten ph\u1ea3i \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp ch\u00ednh x\u00e1c b\u1eb1ng la b\u00e0n \u0111\u00e3 hi\u1ec7u ch\u1ec9nh, d\u1ef1a tr\u00ean k\u1ebf ho\u1ea1ch thi\u1ebft k\u1ebf radio. \u0110\u1ed9 nghi\u00eang c\u01a1 kh\u00ed \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp b\u1eb1ng th\u01b0\u1edbc \u0111o g\u00f3c k\u1ef9 thu\u1eadt s\u1ed1. Sau khi l\u1eafp \u0111\u1eb7t RRU, c\u00e1c c\u00e1p jumper ng\u1eafn k\u1ebft n\u1ed1i ch\u00fang v\u1edbi c\u00e1c c\u1ed5ng anten ph\u1ea3i \u0111\u01b0\u1ee3c g\u1eafn v\u00e0o. M\u1ecdi k\u1ebft n\u1ed1i radio ngo\u00e0i tr\u1eddi ph\u1ea3i \u0111\u01b0\u1ee3c ch\u1ed1ng th\u1eddi ti\u1ebft b\u1eb1ng c\u00e1ch qu\u1ea5n nhi\u1ec1u l\u1edbp mastic cao su butyl v\u00e0 b\u0103ng d\u00ednh vinyl \u0111\u1ec3 ng\u0103n n\u01b0\u1edbc v\u00e0o, nguy\u00ean nh\u00e2n h\u00e0ng \u0111\u1ea7u g\u00e2y PIM v\u00e0 h\u1ecfng h\u1ec7 th\u1ed1ng.<\/p>\n<h3>4. \u0110\u1ecbnh tuy\u1ebfn v\u00e0 qu\u1ea3n l\u00fd c\u00e1p<\/h3>\n<p>Qu\u1ea3n l\u00fd c\u00e1p \u0111\u00fang c\u00e1ch kh\u00f4ng ch\u1ec9 \u0111\u1ec3 \u0111\u1eb9p m\u1eaft; n\u00f3 r\u1ea5t c\u1ea7n thi\u1ebft cho \u0111\u1ed9 tin c\u1eady l\u00e2u d\u00e0i. Ph\u1ea3i duy tr\u00ec s\u1ef1 ph\u00e2n t\u00e1ch r\u00f5 r\u00e0ng gi\u1eefa c\u00e1c lo\u1ea1i c\u00e1p kh\u00e1c nhau: c\u00e1p jumper radio, d\u00e2y quang c\u00e1p quang (CPRI\/eCPRI), c\u00e1p ngu\u1ed3n DC v\u00e0 d\u00e2y ti\u1ebfp \u0111\u1ea5t. M\u1ed7i lo\u1ea1i c\u00e1p c\u00f3 b\u00e1n k\u00ednh u\u1ed1n t\u1ed1i thi\u1ec3u \u0111\u01b0\u1ee3c quy \u0111\u1ecbnh, c\u1ea7n tu\u00e2n th\u1ee7; g\u1eadp g\u00e3y c\u00e1p quang ho\u1eb7c c\u00e1p radio s\u1ebd l\u00e0m gi\u1ea3m hi\u1ec7u su\u1ea5t v\u0129nh vi\u1ec5n. C\u00e1p n\u00ean \u0111\u01b0\u1ee3c c\u1ed1 \u0111\u1ecbnh v\u00e0o th\u00e1p ho\u1eb7c m\u00e1ng c\u00e1p b\u1eb1ng d\u00e2y bu\u1ed9c ho\u1eb7c k\u1eb9p ch\u1ed1ng tia UV theo \u0111\u1ecbnh k\u1ef3. M\u1ed9t \u201cv\u00f2ng nh\u1ecf gi\u1ecdt\u201d ph\u1ea3i \u0111\u01b0\u1ee3c t\u1ea1o th\u00e0nh tr\u00ean t\u1ea5t c\u1ea3 c\u00e1c c\u00e1p ngo\u00e0i tr\u1eddi ngay tr\u01b0\u1edbc khi ch\u00fang \u0111i v\u00e0o nh\u00e0 ch\u1ee9a ho\u1eb7c t\u1ee7. \u0110\u1ed9 u\u1ed1n h\u00ecnh ch\u1eef U \u0111\u01a1n gi\u1ea3n n\u00e0y \u0111\u1ea3m b\u1ea3o n\u01b0\u1edbc m\u01b0a ch\u1ea3y xu\u1ed1ng ph\u00eda d\u01b0\u1edbi c\u1ee7a v\u00f2ng thay v\u00ec theo c\u00e1p v\u00e0o thi\u1ebft b\u1ecb enclosure.<\/p>\n<table>\n<tbody>\n<tr>\n<td width=\"576\"><strong>B\u1ea3ng 2: Danh s\u00e1ch ki\u1ec3m tra kh\u1ea3o s\u00e1t k\u1ef9 thu\u1eadt \u0111\u1ecba \u0111i\u1ec3m<\/strong><\/td>\n<\/tr>\n<tr>\n<td width=\"576\"><strong>Danh m\u1ee5c<\/strong><\/td>\n<\/tr>\n<tr>\n<td width=\"576\"><strong>\u0110\u00e1nh gi\u00e1 radio<\/strong><\/td>\n<\/tr>\n<tr>\n<td width=\"576\"><\/td>\n<\/tr>\n<tr>\n<td width=\"576\"><\/td>\n<\/tr>\n<tr>\n<td width=\"576\"><strong>C\u1ea5u tr\u00fac<\/strong><\/td>\n<\/tr>\n<tr>\n<td width=\"576\"><\/td>\n<\/tr>\n<tr>\n<td width=\"576\"><\/td>\n<\/tr>\n<tr>\n<td width=\"576\"><strong>Ngu\u1ed3n \u0111i\u1ec7n &amp; Ti\u1ebfp \u0111\u1ea5t<\/strong><\/td>\n<\/tr>\n<tr>\n<td width=\"576\"><\/td>\n<\/tr>\n<tr>\n<td width=\"576\"><strong>Backhaul<\/strong><\/td>\n<\/tr>\n<tr>\n<td width=\"576\"><strong>V\u1eadn chuy\u1ec3n logistics<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>C\u00e1c xem x\u00e9t n\u00e2ng cao trong k\u1ef7 nguy\u00ean 5G<\/h2>\n<p>Vi\u1ec7c tri\u1ec3n khai m\u1ea1ng 5G, \u0111\u1eb7c bi\u1ec7t l\u00e0 c\u00e1c m\u1ea1ng s\u1eed d\u1ee5ng Massive MIMO v\u00e0 t\u1ea7n s\u1ed1 s\u00f3ng milimet (mmWave), mang l\u1ea1i m\u1ed9t m\u1ee9c \u0111\u1ed9 ph\u1ee9c t\u1ea1p k\u1ef9 thu\u1eadt m\u1edbi cho vi\u1ec7c l\u1eafp \u0111\u1eb7t tr\u1ea1m ph\u00e1t s\u00f3ng. C\u00e1c c\u00f4ng ngh\u1ec7 n\u00e0y \u0111\u00f2i h\u1ecfi s\u1ef1 thay \u0111\u1ed5i l\u1edbn trong \u0111\u1ed9 ch\u00ednh x\u00e1c v\u00e0 k\u1ef9 thu\u1eadt l\u1eafp \u0111\u1eb7t.<\/p>\n<h3>M\u1ea3ng Anten Massive MIMO<\/h3>\n<p>Anten Massive MIMO, c\u00f3 th\u1ec3 ch\u1ee9a 64 ho\u1eb7c nhi\u1ec1u h\u01a1n c\u00e1c ph\u1ea7n t\u1eed transceiver ri\u00eang l\u1ebb, l\u00e0 \u0111\u1ed9ng c\u01a1 \u0111\u1eb1ng sau c\u00e1c l\u1ee3i \u00edch v\u1ec1 dung l\u01b0\u1ee3ng c\u1ee7a 5G. Tuy nhi\u00ean, \u0111\u1eb7c \u0111i\u1ec3m v\u1eadt l\u00fd c\u1ee7a ch\u00fang \u0111\u1eb7t ra nh\u1eefng th\u00e1ch th\u1ee9c \u0111\u00e1ng k\u1ec3 trong l\u1eafp \u0111\u1eb7t.<\/p>\n<ul>\n<li>Tr\u1ecdng l\u01b0\u1ee3ng v\u00e0 l\u1ef1c gi\u00f3: C\u00e1c m\u1ea3ng n\u00e0y l\u1edbn h\u01a1n v\u00e0 n\u1eb7ng h\u01a1n nhi\u1ec1u so v\u1edbi c\u00e1c th\u1ebf h\u1ec7 4G tr\u01b0\u1edbc \u0111\u00f3. \u0110i\u1ec1u n\u00e0y \u0111\u00f2i h\u1ecfi ph\u1ea7n c\u1ee9ng g\u1eafn ch\u1eafc ch\u1eafn h\u01a1n v\u00e0 trong nhi\u1ec1u tr\u01b0\u1eddng h\u1ee3p, ph\u1ea3i n\u00e2ng c\u1ea5p ho\u1eb7c c\u1ee7ng c\u1ed1 c\u00e1c th\u00e1p v\u00e0 c\u1ea5u tr\u00fac m\u00e1i nh\u00e0 hi\u1ec7n c\u00f3 \u0111\u1ec3 x\u1eed l\u00fd tr\u1ecdng l\u01b0\u1ee3ng t\u0129nh t\u0103ng v\u00e0 l\u1ef1c gi\u00f3 \u0111\u1ed9ng.<\/li>\n<li>Hi\u1ec7u ch\u1ec9nh ch\u00ednh x\u00e1c: Hi\u1ec7u qu\u1ea3 c\u1ee7a beamforming 5G ho\u00e0n to\u00e0n ph\u1ee5 thu\u1ed9c v\u00e0o h\u01b0\u1edbng v\u1eadt l\u00fd ch\u00ednh x\u00e1c c\u1ee7a anten. Trong khi azimuth v\u00e0 \u0111\u1ed9 nghi\u00eang v\u1eabn quan tr\u1ecdng, th\u00ec roll (ho\u1eb7c th\u1eb3ng \u0111\u1ee9ng) c\u1ee7a anten c\u0169ng tr\u1edf n\u00ean quan tr\u1ecdng kh\u00f4ng k\u00e9m. Ngay c\u1ea3 sai s\u1ed1 m\u1ed9t \u0111\u1ed9 trong roll c\u0169ng c\u00f3 th\u1ec3 l\u00e0m cho c\u00e1c tia h\u1eb9p h\u00ecnh th\u00e0nh kh\u00f4ng ch\u00ednh x\u00e1c, \u1ea3nh h\u01b0\u1edfng \u0111\u00e1ng k\u1ec3 \u0111\u1ebfn hi\u1ec7u su\u1ea5t v\u00e0 hi\u1ec7u qu\u1ea3. Vi\u1ec7c l\u1eafp \u0111\u1eb7t \u0111\u00f2i h\u1ecfi c\u00e1c c\u00f4ng c\u1ee5 \u0111o ch\u00ednh x\u00e1c cao, \u0111o theo ba tr\u1ee5c.<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/pixabay-928229.jpg\" height=\"972\" width=\"1280\" class=\"alignnone size-full wp-image-2632\" alt=\"M\u00e1y bi\u1ebfn \u00e1p c\u00f4ng nghi\u1ec7p \u0111\u01b0\u1ee3c \u0111\u1eb7t trong h\u1ed9p kim lo\u1ea1i ch\u1eafc ch\u1eafn c\u00f3 qu\u1ea1t l\u00e0m m\u00e1t v\u00e0 c\u00e1c k\u1ebft n\u1ed1i \u0111i\u1ec7n, thi\u1ebft k\u1ebf \u0111\u1ec3 ph\u00e2n ph\u1ed1i \u0111i\u1ec7n n\u0103ng \u0111\u00e1ng tin c\u1eady trong c\u00e1c tr\u1ea1m ph\u00e1t s\u00f3ng di \u0111\u1ed9ng.\" srcset=\"https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/pixabay-928229.jpg 1280w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/pixabay-928229-300x228.jpg 300w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/pixabay-928229-768x583.jpg 768w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/pixabay-928229-16x12.jpg 16w\" sizes=\"(max-width: 1280px) 100vw, 1280px\" \/> <\/p>\n<h3>L\u1eafp \u0111\u1eb7t Radio s\u00f3ng milimet<\/h3>\n<p>Vi\u1ec7c tri\u1ec3n khai mmWave, s\u1eed d\u1ee5ng c\u00e1c b\u0103ng t\u1ea7n t\u1ea7n s\u1ed1 cao nh\u01b0 n257 (28 GHz), n260 (39 GHz) v\u00e0 n261 (24 GHz) c\u1ee7a 3GPP, l\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c t\u1ed1c \u0111\u1ed9 \u0111a gigabit. C\u00e1c \u0111\u1eb7c t\u00ednh truy\u1ec1n s\u00f3ng c\u1ee7a ch\u00fang \u0111\u00f2i h\u1ecfi m\u1ed9t chi\u1ebfn l\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t ho\u00e0n to\u00e0n kh\u00e1c bi\u1ec7t.<\/p>\n<ul>\n<li>\u0110\u1ed9 nh\u1ea1y c\u1ea3m c\u1ef1c cao v\u1edbi s\u1ef1 c\u1ea3n tr\u1edf: t\u00edn hi\u1ec7u mmWave ho\u1ea1t \u0111\u1ed9ng gi\u1ed1ng nh\u01b0 \u00e1nh s\u00e1ng h\u01a1n l\u00e0 s\u00f3ng radio truy\u1ec1n th\u1ed1ng. Ch\u00fang b\u1ecb suy y\u1ebfu nghi\u00eam tr\u1ecdng b\u1edfi c\u00e1c v\u1eadt li\u1ec7u ph\u1ed5 bi\u1ebfn nh\u01b0 k\u00ednh, l\u00e1 c\u00e2y v\u00e0 th\u1eadm ch\u00ed l\u00e0 c\u01a1 th\u1ec3 ng\u01b0\u1eddi. Hi\u1ec7u \u1ee9ng \u201cc\u1ea3n tr\u1edf\u201d n\u00e0y c\u00f3 ngh\u0129a l\u00e0 \u0111\u01b0\u1eddng truy\u1ec1n r\u00f5 r\u00e0ng kh\u00f4ng ch\u1ec9 l\u00e0 \u01b0u ti\u00ean; n\u00f3 th\u01b0\u1eddng l\u00e0 b\u1eaft bu\u1ed9c. Ng\u01b0\u1eddi l\u1eafp \u0111\u1eb7t ph\u1ea3i l\u00ean k\u1ebf ho\u1ea1ch c\u1ea9n th\u1eadn v\u1ecb tr\u00ed \u0111\u1ec3 tr\u00e1nh m\u1ecdi v\u1eadt c\u1ea3n nh\u1ecf nh\u1ea5t.<\/li>\n<li>Ph\u1ea1m vi gi\u1ea3m s\u00fat: M\u1ee9c m\u1ea5t t\u00edn hi\u1ec7u cao \u1edf c\u00e1c t\u1ea7n s\u1ed1 n\u00e0y gi\u1edbi h\u1ea1n ph\u1ea1m vi ho\u1ea1t \u0111\u1ed9ng hi\u1ec7u qu\u1ea3 c\u1ee7a s\u00f3ng radio mmWave ch\u1ec9 c\u00f2n 200 m\u00e9t ho\u1eb7c \u00edt h\u01a1n trong m\u1ed9t khu v\u1ef1c \u0111\u00f4 th\u1ecb \u0111i\u1ec3n h\u00ecnh. \u0110i\u1ec1u n\u00e0y \u0111\u00f2i h\u1ecfi m\u1ed9t m\u1ea1ng l\u01b0\u1edbi r\u1ea5t d\u00e0y \u0111\u1eb7c, v\u1edbi c\u00e1c thi\u1ebft b\u1ecb l\u1eafp \u0111\u1eb7t tr\u00ean c\u1ed9t \u0111\u00e8n, \u0111\u00e8n giao th\u00f4ng v\u00e0 m\u1eb7t ti\u1ec1n c\u00e1c t\u00f2a nh\u00e0, chuy\u1ec3n \u0111\u1ed5i tr\u1ea1m ph\u00e1t t\u1eeb m\u00e1i nh\u00e0 xu\u1ed1ng m\u1eb7t \u0111\u1ea5t.<\/li>\n<\/ul>\n<h3>Ngu\u1ed3n \u0111i\u1ec7n v\u00e0 l\u00e0m m\u00e1t cho 5G<\/h3>\n<p>Vi\u1ec7c x\u1eed l\u00fd ti\u00ean ti\u1ebfn v\u00e0 s\u1ed1 l\u01b0\u1ee3ng b\u1ed9 truy\u1ec1n nh\u1eadn cao trong c\u00e1c anten 5G ho\u1ea1t \u0111\u1ed9ng (n\u01a1i radio v\u00e0 anten t\u00edch h\u1ee3p) d\u1eabn \u0111\u1ebfn m\u1ee9c ti\u00eau th\u1ee5 n\u0103ng l\u01b0\u1ee3ng l\u1edbn h\u01a1n v\u00e0 sinh nhi\u1ec7t nhi\u1ec1u h\u01a1n so v\u1edbi h\u1ec7 th\u1ed1ng anten th\u1ee5 \u0111\u1ed9ng 4G. Nh\u00e0 m\u00e1y ph\u00e1t \u0111i\u1ec7n DC v\u00e0 h\u1ec7 th\u1ed1ng d\u1ef1 ph\u00f2ng pin c\u1ee7a tr\u1ea1m th\u01b0\u1eddng c\u1ea7n \u0111\u01b0\u1ee3c n\u00e2ng c\u1ea5p \u0111\u1ec3 x\u1eed l\u00fd t\u1ea3i cao h\u01a1n. T\u01b0\u01a1ng t\u1ef1, l\u01b0\u1ee3ng nhi\u1ec7t ph\u00e1t sinh \u0111\u00f2i h\u1ecfi c\u00e1c gi\u1ea3i ph\u00e1p l\u00e0m m\u00e1t hi\u1ec7u qu\u1ea3 h\u01a1n, \u0111\u1eb7c bi\u1ec7t l\u00e0 cho c\u00e1c h\u1ed9p nh\u1ecf g\u1ecdn c\u1ee7a c\u00e1c cell nh\u1ecf, n\u01a1i vi\u1ec7c lo\u1ea1i b\u1ecf nhi\u1ec7t l\u00e0 m\u1ed9t h\u1ea1n ch\u1ebf thi\u1ebft k\u1ebf ch\u00ednh.<\/p>\n<h2>Sau khi l\u1eafp \u0111\u1eb7t v\u00e0 ki\u1ec3m tra<\/h2>\n<p>Qu\u00e1 tr\u00ecnh c\u00e0i \u0111\u1eb7t ch\u01b0a ho\u00e0n t\u1ea5t cho \u0111\u1ebfn khi h\u1ec7 th\u1ed1ng \u0111\u01b0\u1ee3c b\u1eadt ngu\u1ed3n, c\u1ea5u h\u00ecnh v\u00e0 ki\u1ec3m tra k\u1ef9 l\u01b0\u1ee1ng <a href=\"https:\/\/productionscrews.com\/vi\/ultimate-guide-precision-screws-manufacturing-from-materials-to-performance-testing\/\"  data-wpil-monitor-id=\"467\" target=\"_blank\">\u0111\u00e3 th\u1eed nghi\u1ec7m \u0111\u1ec3 x\u00e1c nh\u1eadn n\u00f3 \u0111\u00e1p \u1ee9ng t\u1ea5t c\u1ea3 c\u00e1c ti\u00eau chu\u1ea9n hi\u1ec7u su\u1ea5t<\/a> Th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt. Giai \u0111o\u1ea1n v\u1eadn h\u00e0nh th\u1eed v\u00e0 t\u00edch h\u1ee3p n\u00e0y l\u00e0 b\u01b0\u1edbc ki\u1ec3m tra ch\u1ea5t l\u01b0\u1ee3ng cu\u1ed1i c\u00f9ng tr\u01b0\u1edbc khi cho ph\u00e9p trang web ho\u1ea1t \u0111\u1ed9ng v\u1edbi l\u01b0u l\u01b0\u1ee3ng kh\u00e1ch h\u00e0ng tr\u1ef1c ti\u1ebfp.<\/p>\n<h3>L\u1eafp \u0111\u1eb7t v\u00e0 t\u00edch h\u1ee3p h\u1ec7 th\u1ed1ng<\/h3>\n<p>Giai \u0111o\u1ea1n n\u00e0y b\u1eaft \u0111\u1ea7u b\u1eb1ng vi\u1ec7c c\u1ea5p ngu\u1ed3n cho thi\u1ebft b\u1ecb theo tr\u00ecnh t\u1ef1 ki\u1ec3m so\u00e1t. BBU \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i v\u1edbi m\u1ea1ch backhaul v\u00e0 thi\u1ebft l\u1eadp li\u00ean k\u1ebft v\u1edbi m\u1ea1ng l\u00f5i. C\u00e1c li\u00ean k\u1ebft c\u00e1p quang (CPRI ho\u1eb7c eCPRI) gi\u1eefa BBU v\u00e0 c\u00e1c RRUs sau \u0111\u00f3 \u0111\u01b0\u1ee3c k\u00edch ho\u1ea1t. K\u1ef9 thu\u1eadt vi\u00ean t\u1ea3i ph\u1ea7n m\u1ec1m v\u00e0 c\u00e1c t\u1ec7p c\u1ea5u h\u00ecnh \u0111\u1eb7c th\u00f9 c\u1ee7a \u0111\u1ecba \u0111i\u1ec3m, x\u00e1c \u0111\u1ecbnh c\u00e1c th\u00f4ng s\u1ed1 ho\u1ea1t \u0111\u1ed9ng c\u1ee7a cell nh\u01b0 t\u1ea7n s\u1ed1, m\u1ee9c c\u00f4ng su\u1ea5t v\u00e0 danh s\u00e1ch c\u00e1c cell l\u00e2n c\u1eadn.<\/p>\n<h3>Ki\u1ec3m tra Hi\u1ec7u su\u1ea5t Quan tr\u1ecdng<\/h3>\n<p>Sau khi h\u1ec7 th\u1ed1ng \u0111\u01b0\u1ee3c c\u1ea5u h\u00ecnh, m\u1ed9t lo\u1ea1t c\u00e1c b\u00e0i ki\u1ec3m tra \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n \u0111\u1ec3 x\u00e1c nh\u1eadn ch\u1ea5t l\u01b0\u1ee3ng c\u1ee7a vi\u1ec7c l\u1eafp \u0111\u1eb7t v\u1eadt l\u00fd.<\/p>\n<ul>\n<li>Qu\u00e9t VSWR\/Thi\u1ec7t h\u1ea1i ph\u1ea3n x\u1ea1: M\u1ed9t B\u1ed9 ph\u00e2n t\u00edch m\u1ea1ng vect\u01a1 (VNA) \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ph\u00e1t t\u00edn hi\u1ec7u qua \u0111\u01b0\u1eddng truy\u1ec1n radio v\u00e0 \u0111o l\u01b0\u1ee3ng t\u00edn hi\u1ec7u ph\u1ea3n x\u1ea1 tr\u1edf l\u1ea1i. VSWR cao (T\u1ef7 l\u1ec7 s\u00f3ng \u0111\u1ee9ng \u0111i\u1ec7n \u00e1p) ho\u1eb7c Thi\u1ec7t h\u1ea1i ph\u1ea3n x\u1ea1 th\u1ea5p cho th\u1ea5y c\u00f3 v\u1ea5n \u0111\u1ec1, ch\u1eb3ng h\u1ea1n nh\u01b0 k\u1ebft n\u1ed1i k\u00e9m, c\u00e1p b\u1ecb g\u1eadp ho\u1eb7c anten b\u1ecb l\u1ed7i.<\/li>\n<li>Ki\u1ec3m tra PIM: M\u1ed9t thi\u1ebft b\u1ecb ki\u1ec3m tra PIM chuy\u00ean d\u1ee5ng b\u01a1m hai t\u1ea7n s\u1ed1 c\u00f4ng su\u1ea5t cao v\u00e0o \u0111\u01b0\u1eddng truy\u1ec1n radio v\u00e0 \u0111o c\u00e1c s\u1ea3n ph\u1ea9m n\u1ed9i m\u00f4. N\u1ebfu m\u1ee9c PIM kh\u00f4ng ch\u1ea5p nh\u1eadn \u0111\u01b0\u1ee3c, nh\u00f3m ph\u1ea3i ki\u1ec3m tra \u0111\u01b0\u1eddng truy\u1ec1n, ki\u1ec3m tra \u0111\u1ed9 k\u00edn c\u1ee7a c\u00e1c k\u1ebft n\u1ed1i v\u00e0 t\u00ecm ki\u1ebfm c\u00e1c ngu\u1ed3n PIM b\u00ean ngo\u00e0i.<\/li>\n<li>Ki\u1ec3m tra quang h\u1ecdc: M\u1ed9t thi\u1ebft b\u1ecb ph\u1ea3n x\u1ea1 quang th\u1eddi gian th\u1ef1c (OTDR) \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ki\u1ec3m tra t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a c\u00e1c \u0111o\u1ea1n c\u00e1p quang gi\u1eefa BBU v\u00e0 RRUs, x\u00e1c \u0111\u1ecbnh b\u1ea5t k\u1ef3 \u0111o\u1ea1n u\u1ed1n cong qu\u00e1 m\u1ee9c, m\u1ed1i n\u1ed1i k\u00e9m ho\u1eb7c \u0111\u1ea7u n\u1ed1i b\u1ea9n n\u00e0o.<\/li>\n<li>Ki\u1ec3m tra cu\u1ed9c g\u1ecdi v\u00e0 th\u00f4ng l\u01b0\u1ee3ng: X\u00e1c nh\u1eadn cu\u1ed1i c\u00f9ng li\u00ean quan \u0111\u1ebfn vi\u1ec7c s\u1eed d\u1ee5ng c\u00e1c thi\u1ebft b\u1ecb th\u1eed nghi\u1ec7m \u0111\u1ec3 th\u1ef1c hi\u1ec7n cu\u1ed9c g\u1ecdi tho\u1ea1i v\u00e0 ch\u1ea1y c\u00e1c b\u00e0i ki\u1ec3m tra t\u1ed1c \u0111\u1ed9 d\u1eef li\u1ec7u (nh\u01b0 t\u1ea3i xu\u1ed1ng FTP, xem video tr\u1ef1c tuy\u1ebfn) trong t\u1eebng khu v\u1ef1c c\u1ee7a t\u1ebf b\u00e0o. \u0110i\u1ec1u n\u00e0y x\u00e1c nh\u1eadn r\u1eb1ng \u0111\u1ecba \u0111i\u1ec3m ho\u1ea1t \u0111\u1ed9ng \u0111\u00fang nh\u01b0 mong \u0111\u1ee3i t\u1eeb g\u00f3c nh\u00ecn c\u1ee7a ng\u01b0\u1eddi d\u00f9ng.<\/li>\n<\/ul>\n<table>\n<tbody>\n<tr>\n<td width=\"576\"><strong>B\u1ea3ng 3: C\u00e1c Tham S\u1ed1 Ki\u1ec3m Tra Ch\u1ea5p Nh\u1eadn v\u00e0 Ti\u00eau Chu\u1ea9n Ch\u1ea5p Nh\u1eadn Ch\u00ednh<\/strong><\/td>\n<\/tr>\n<tr>\n<td width=\"576\"><strong>Th\u00f4ng s\u1ed1 th\u1eed nghi\u1ec7m<\/strong><\/td>\n<\/tr>\n<tr>\n<td width=\"576\"><strong>T\u1ef7 s\u1ed1 s\u00f3ng \u0111\u1ee9ng \u0111i\u1ec7n \u00e1p (VSWR)<\/strong><\/td>\n<\/tr>\n<tr>\n<td width=\"576\"><strong>M\u1ea5t m\u00e1t ph\u1ea3n h\u1ed3i<\/strong><\/td>\n<\/tr>\n<tr>\n<td width=\"576\"><strong>PIM (T\u01b0\u01a1ng Intermodulation th\u1ee5 \u0111\u1ed9ng)<\/strong><\/td>\n<\/tr>\n<tr>\n<td width=\"576\"><strong>RSSI (Ch\u1ec9 s\u1ed1 c\u01b0\u1eddng \u0111\u1ed9 t\u00edn hi\u1ec7u nh\u1eadn \u0111\u01b0\u1ee3c)<\/strong><\/td>\n<\/tr>\n<tr>\n<td width=\"576\"><strong>RSRP (C\u01b0\u1eddng \u0111\u1ed9 t\u00edn hi\u1ec7u tham chi\u1ebfu nh\u1eadn \u0111\u01b0\u1ee3c)<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>T\u1ed5ng h\u1ee3p t\u1ea5t c\u1ea3<\/h2>\n<p>Vi\u1ec7c l\u1eafp \u0111\u1eb7t tr\u1ea1m ph\u00e1t s\u00f3ng th\u00e0nh c\u00f4ng c\u00f2n h\u01a1n c\u1ea3 m\u1ed9t nhi\u1ec7m v\u1ee5 x\u00e2y d\u1ef1ng; \u0111\u00f3 l\u00e0 s\u1ef1 k\u1ebft h\u1ee3p v\u1eadt l\u00fd c\u1ee7a nhi\u1ec1u ng\u00e0nh k\u1ef9 thu\u1eadt. N\u00f3 \u0111\u00f2i h\u1ecfi hi\u1ec3u bi\u1ebft s\u00e2u s\u1eafc v\u1ec1 v\u1eadt l\u00fd t\u1ea7n s\u1ed1 v\u00f4 tuy\u1ebfn, \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a k\u1ef9 thu\u1eadt c\u1ea5u tr\u00fac v\u00e0 \u0111i\u1ec7n, c\u0169ng nh\u01b0 \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a c\u00f4ng ngh\u1ec7 th\u00f4ng tin. T\u1eeb vi\u1ec7c ch\u1ecdn v\u1ecb tr\u00ed d\u1ef1a tr\u00ean m\u00f4 h\u00ecnh c\u1ea9n th\u1eadn \u0111\u1ebfn c\u00e1c b\u00e0i ki\u1ec3m tra ch\u1ea5p nh\u1eadn cu\u1ed1i c\u00f9ng d\u1ef1a tr\u00ean d\u1eef li\u1ec7u, m\u1ecdi b\u01b0\u1edbc ph\u1ea3i \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n theo c\u00e1c nguy\u00ean t\u1eafc k\u1ef9 thu\u1eadt ch\u00ednh x\u00e1c. Khi c\u00e1c m\u1ea1ng ph\u00e1t tri\u1ec3n v\u1edbi t\u1ed1i \u01b0u h\u00f3a d\u1ef1a tr\u00ean tr\u00ed tu\u1ec7 nh\u00e2n t\u1ea1o v\u00e0 t\u1eadp trung v\u00e0o c\u00e1c tr\u1ea1m ph\u00e1t s\u00f3ng \u201cxanh\u201d ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng, ph\u01b0\u01a1ng ph\u00e1p \u0111a ng\u00e0nh k\u1ef9 thu\u1eadt ch\u00ednh x\u00e1c n\u00e0y s\u1ebd c\u00e0ng tr\u1edf n\u00ean quan tr\u1ecdng h\u01a1n trong vi\u1ec7c x\u00e2y d\u1ef1ng h\u1ea1 t\u1ea7ng truy\u1ec1n th\u00f4ng c\u1ee7a t\u01b0\u01a1ng lai.<\/p>\n<ul>\n<li class=\"whitespace-normal break-words\">Ti\u00eau chu\u1ea9n L\u1eafp \u0111\u1eb7t Ph\u1ee5 ki\u1ec7n \u2013 ASTM Qu\u1ed1c t\u1ebf <a class=\"underline\" href=\"https:\/\/www.astm.org\/\" target=\"_blank\" rel=\"noopener\">https:\/\/www.astm.org\/<\/a><\/li>\n<li class=\"whitespace-normal break-words\">L\u1eafp \u0111\u1eb7t bu l\u00f4ng v\u00e0 M\u00f4-men xo\u1eafn \u2013 ISO <a class=\"underline\" href=\"https:\/\/www.iso.org\/\" target=\"_blank\" rel=\"noopener\">https:\/\/www.iso.org\/<\/a><\/li>\n<li class=\"whitespace-normal break-words\">H\u1ec7 th\u1ed1ng Bu l\u00f4ng C\u1ea5u tr\u00fac \u2013 RCSC (H\u1ed9i \u0111\u1ed3ng Nghi\u00ean c\u1ee9u v\u1ec1 K\u1ebft n\u1ed1i C\u1ea5u tr\u00fac) <a class=\"underline\" href=\"https:\/\/www.boltcouncil.org\/\" target=\"_blank\" rel=\"noopener\">https:\/\/www.boltcouncil.org\/<\/a><\/li>\n<li class=\"whitespace-normal break-words\">Thi\u1ebft k\u1ebf M\u1ed1i n\u1ed1i Bu l\u00f4ng \u2013 ASME <a class=\"underline\" href=\"https:\/\/www.asme.org\/\" target=\"_blank\" rel=\"noopener\">https:\/\/www.asme.org\/<\/a><\/li>\n<li class=\"whitespace-normal break-words\">Ph\u01b0\u01a1ng ph\u00e1p Si\u1ebft ch\u1eb7t Bu l\u00f4ng \u2013 Wikipedia <a class=\"underline\" href=\"https:\/\/en.wikipedia.org\/wiki\/Bolted_joint\" target=\"_blank\" rel=\"noopener\">https:\/\/en.wikipedia.org\/wiki\/Bolted_joint<\/a><\/li>\n<li class=\"whitespace-normal break-words\">C\u00f4ng ngh\u1ec7 Ph\u1ee5 ki\u1ec7n \u2013 SAE Qu\u1ed1c t\u1ebf <a class=\"underline\" href=\"https:\/\/www.sae.org\/\" target=\"_blank\" rel=\"noopener\">https:\/\/www.sae.org\/<\/a><\/li>\n<li class=\"whitespace-normal break-words\">Vi\u1ec7n Ph\u1ee5 ki\u1ec7n C\u00f4ng nghi\u1ec7p <a class=\"underline\" href=\"https:\/\/www.industrial-fasteners.org\/\" target=\"_blank\" rel=\"noopener\">https:\/\/www.industrial-fasteners.org\/<\/a><\/li>\n<li class=\"whitespace-normal break-words\">X\u00e2y d\u1ef1ng Th\u00e9p C\u1ea5u tr\u00fac \u2013 AISC <a class=\"underline\" href=\"https:\/\/www.aisc.org\/\" target=\"_blank\" rel=\"noopener\">https:\/\/www.aisc.org\/<\/a><\/li>\n<li class=\"whitespace-normal break-words\">K\u1ef9 thu\u1eadt L\u1eafp \u0111\u1eb7t Bu l\u00f4ng \u2013 ScienceDirect <a class=\"underline\" href=\"https:\/\/www.sciencedirect.com\/topics\/engineering\/bolt-tightening\" target=\"_blank\" rel=\"noopener\">https:\/\/www.sciencedirect.com\/topics\/engineering\/bolt-tightening<\/a><\/li>\n<li class=\"whitespace-normal break-words\">S\u1ea3n xu\u1ea5t v\u00e0 b\u1eaft v\u00edt \u2013 Thomasnet <a class=\"underline\" href=\"https:\/\/www.thomasnet.com\/\" target=\"_blank\" rel=\"noopener\">https:\/\/www.thomasnet.com\/<\/a><\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>H\u01b0\u1edbng d\u1eabn \u0111\u1ea7y \u0111\u1ee7 v\u1ec1 vi\u1ec7c thi\u1ebft l\u1eadp tr\u1ea1m ph\u00e1t s\u00f3ng di \u0111\u1ed9ng: X\u00e2y d\u1ef1ng m\u1ea1ng di \u0111\u1ed9ng t\u1ed1t h\u01a1n T\u1ea1i sao vi\u1ec7c l\u00e0m \u0111\u00fang l\u1ea1i quan tr\u1ecdng Vi\u1ec7c thi\u1ebft l\u1eadp tr\u1ea1m ph\u00e1t s\u00f3ng di \u0111\u1ed9ng \u0111\u00fang c\u00e1ch l\u00e0 \u0111i\u1ec1u c\u1ef1c k\u1ef3 c\u1ea7n thi\u1ebft \u0111\u1ec3 t\u1ea1o ra m\u1ed9t m\u1ea1ng di \u0111\u1ed9ng m\u1ea1nh m\u1ebd, \u0111\u00e1ng tin c\u1eady. \u0110\u00e2y l\u00e0 n\u01a1i khoa h\u1ecdc s\u00f3ng v\u00f4 tuy\u1ebfn, k\u1ef9 thu\u1eadt x\u00e2y d\u1ef1ng v\u00e0 m\u1ea1ng m\u00e1y t\u00ednh h\u1ed9i t\u1ee5 trong m\u1ed9t v\u1ecb tr\u00ed v\u1eadt l\u00fd. Ch\u1ec9 m\u1ed9t k\u1ebft n\u1ed1i l\u1ecfng l\u1ebbo, m\u1ed9t k\u1ebft n\u1ed1i k\u00e9m [\u2026]<\/p>","protected":false},"author":1,"featured_media":2632,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[24],"tags":[],"class_list":["post-2631","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-5g-communication-fasteners"],"_links":{"self":[{"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/posts\/2631","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/comments?post=2631"}],"version-history":[{"count":3,"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/posts\/2631\/revisions"}],"predecessor-version":[{"id":2875,"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/posts\/2631\/revisions\/2875"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/media\/2632"}],"wp:attachment":[{"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/media?parent=2631"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/categories?post=2631"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/tags?post=2631"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}