{"id":2310,"date":"2024-04-01T23:25:21","date_gmt":"2024-04-01T23:25:21","guid":{"rendered":"https:\/\/www.xadv.eu\/?p=2310"},"modified":"2024-05-02T19:33:05","modified_gmt":"2024-05-02T19:33:05","slug":"fapi-vs-nfapi","status":"publish","type":"post","link":"https:\/\/www.xadv.eu\/hu\/2024\/04\/01\/fapi-vs-nfapi\/","title":{"rendered":"FAPI vs nFAPI"},"content":{"rendered":"<p>A hagyom\u00e1nyos RAN macro h\u00e1l\u00f3zatok CPRI vagy eCPRI fronthaul kapcsolatot haszn\u00e1lnak a baseband egys\u00e9g (BBU) \u00e9s a remote r\u00e1di\u00f3egys\u00e9g (RRU) k\u00f6z\u00f6tt. A CPRI ink\u00e1bb az LTE-ben m\u00edg az eCPRI az 5G h\u00e1l\u00f3zatokban gyakoribb fronthaul technol\u00f3gia.<\/p>\n\n\n\n<p>A small cell\u00e1k eset\u00e9ben a CPRI fronthaul technol\u00f3gia az a nagy s\u00e1vsz\u00e9less\u00e9g \u00e9s \u00e1lland\u00f3 bitsebess\u00e9g ig\u00e9nye miatt nem a legmegfelel\u0151bb. Ez\u00e9rt a Small Cell Forum m\u00e1s szervezetekkel k\u00f6z\u00f6sen kidolgozta a small cell\u00e1s h\u00e1l\u00f3zatok sz\u00e1m\u00e1ra a ny\u00edlt szabv\u00e1nyokon alapul\u00f3 a FAPI \u00e9s az nFAPI fronthaul interf\u00e9szeket, amelyet a 3GPP is elfogad. <\/p>\n\n\n\n<p>Ezek a small cell\u00e1s h\u00e1l\u00f3zatokra szabott ny\u00edlt interf\u00e9szek a FAPI &#8211; a funkcion\u00e1lis alkalmaz\u00e1splatform interf\u00e9sz &#8211; \u00e9s az nFAPI &#8211; a h\u00e1l\u00f3zati FAPI.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">FAPI<\/h4>\n\n\n\n<p>A FAPI, mint ny\u00edlt bels\u0151 interf\u00e9sz a MAC \u00e9s PHY protokollok k\u00f6z\u00f6tt seg\u00edt a szolg\u00e1ltat\u00f3knak \u00e9s h\u00e1l\u00f3zat integr\u00e1toroknak a k\u00fcl\u00f6nb\u00f6z\u0151 sz\u00e1ll\u00edt\u00f3kt\u00f3l sz\u00e1rmaz\u00f3 hardevrek \u00e9s szoftverek kombin\u00e1l\u00e1s\u00e1ban. A gy\u00e1rt\u00f3k pedig ezen interf\u00e9szek alapj\u00e1n tervehetik, fejleszthetik eszk\u00f6zeiket, amik \u00edgy m\u00e1s gy\u00e1rt\u00f3k eszk\u00f6zeivel is k\u00e9pesek egy\u00fcttm\u0171k\u00f6dni. A Small Cell\u00e1s rendszerben a FAPI bels\u0151 interf\u00e9szk\u00e9nt a k\u00f6zponti Small cellla \u00e9s a fizikai remote radio k\u00f6z\u00f6tt m\u0171k\u00f6dik. A macro cell\u00e1s hal\u00f3zatokban a 7-2-es feloszt\u00e1s szerint a DU-ban a MAC-PHY protokollok k\u00f6z\u00f6tti ny\u00edlt interf\u00e9szk\u00e9nt m\u0171k\u00f6dik.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">nFAPI<\/h4>\n\n\n\n<p>Az nFAPI ny\u00edlt h\u00e1l\u00f3zati interf\u00e9sz el\u0151seg\u00edti az Open RAN \u00f6kosziszt\u00e9m\u00e1t az\u00e1ltal, hogy lehet\u0151v\u00e9 teszi b\u00e1rmely gy\u00e1rt\u00f3 small cella k\u00f6zponti egys\u00e9ge (CU\/DU) sz\u00e1m\u00e1ra, hogy csatlakozzon b\u00e1rmely m\u00e1s gy\u00e1rt\u00f3 small cell\u00e1s remote r\u00e1di\u00f3egys\u00e9g\u00e9hez (S-RU).  Az nFAPI t\u00e1mogatja a virtualiz\u00e1lt small cell\u00e1s h\u00e1l\u00f3zatokat is, ahol ny\u00edlt interf\u00e9szt biztos\u00edt a remote r\u00e1di\u00f3egys\u00e9g (S-RU) \u00e9s a k\u00f6zponti small cella (S-CU\/S-DU) k\u00f6z\u00f6tt.<\/p>\n\n\n\n<p>Az al\u00e1bbi \u00e1bra mutatja, hogy a FAPI interf\u00e9sz a MAC \u00e9s PHY protokollok k\u00f6z\u00f6tti kapcsolatot biztos\u00edtja 3GPP ny\u00edlt szabv\u00e1nyokat alkalmazva. A FAPI interf\u00e9sz a 6-os feloszt\u00e1si opci\u00f3  estet\u00e9n, ami a small cell\u00e1s h\u00e1l\u00f3zatok kedvelt feloszt\u00e1si m\u00f3dja a k\u00f6zponit small cella CU \u00e9s DU funkci\u00f3it v\u00e1laszja el a radio egys\u00e9g RU funkci\u00f3it\u00f3l. H\u00e1l\u00f3zati intef\u00e9szk\u00e9nt az nFAPI biztos\u00edtja a fronthaul kapcsolatot ebben az esetben. A small cell\u00e1s h\u00e1l\u00f3zatokban a FAPI \u00e9s nFAPI interf\u00e9szek k\u00f6z\u00f6sen helyezkedhetnek el a MAC \u00e9s PHY protkollok k\u00f6z\u00f6tt. Ez a feloszt\u00e1si opci\u00f3 egyben a virtualiz\u00e1lt small cell\u00e1s h\u00e1l\u00f3zatokban a virtu\u00e1lis \u00e9s fizikai elv\u00e1laszt\u00e1st is megval\u00f3s\u00edtja.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"912\" height=\"441\" src=\"https:\/\/www.xadv.eu\/wp-content\/uploads\/2024\/04\/FAPI-and-nFAPI-SCF-v1.jpg\" alt=\"\" class=\"wp-image-2311\" srcset=\"https:\/\/www.xadv.eu\/wp-content\/uploads\/2024\/04\/FAPI-and-nFAPI-SCF-v1.jpg 912w, https:\/\/www.xadv.eu\/wp-content\/uploads\/2024\/04\/FAPI-and-nFAPI-SCF-v1-300x145.jpg 300w, https:\/\/www.xadv.eu\/wp-content\/uploads\/2024\/04\/FAPI-and-nFAPI-SCF-v1-768x371.jpg 768w, https:\/\/www.xadv.eu\/wp-content\/uploads\/2024\/04\/FAPI-and-nFAPI-SCF-v1-18x9.jpg 18w\" sizes=\"(max-width: 912px) 100vw, 912px\" \/><\/figure>\n\n\n\n<p class=\"has-text-align-center has-small-font-size\"><strong>1.\u00c1bra. FAPI and nFAPI<\/strong><\/p>\n\n\n\n<p class=\"has-text-align-right has-small-font-size\">Source: SCF<\/p>\n\n\n\n<p>A mirco cell\u00e1s h\u00e1l\u00f3zatokban legink\u00e1bb a 7-es vagy a 2-es feloszt\u00e1st haszn\u00e1lj\u00e1k k\u00fcl\u00f6nb\u00f6z\u0151 okok miatt. Itt a FAPI interf\u00e9sz szint\u00e9n bels\u0151 interflszk\u00e9nt biztos\u00edtja a kapcsolatot a MAC \u00e9s PHY protokollok k\u00f6z\u00f6tt. Mivel a BBU-ban a DU tartalmazza mind a MAC mind a PHY protokollokat, \u00edgy a DU-n bel\u00fcl tal\u00e1lhat\u00f3 a FAPI.  Az nFAPI interf\u00e9sz helyett a marco cell\u00e1s h\u00e1l\u00f3zatokban a ny\u00edlt  fronthaul eCPRI-t a z\u00e1rt pedig CPRI-t alkalmaz. A 2-es feloszt\u00e1s eset\u00e9n a CU \u00e9s DU funkci\u00f3k k\u00f6z\u00f6tt az F1 interf\u00e9sz bitos\u00edtja a kapcsolatot.<\/p>\n\n\n\n<p>A distributed small cell\u00e1k eset\u00e9s sincs sz\u00fcks\u00e9g nFAPI interf\u00e9szre, mivel a rendszer egys\u00e9get k\u00e9pez \u00e9s nincs k\u00fcl\u00f6n k\u00f6zponti illetve remote RU.<\/p>\n\n\n\n<p><strong>A FAPI \u00e9s az nFAPI k\u00f6z\u00f6tti k\u00fcl\u00f6nbs\u00e9g r\u00f6viden \u00f6sszefoglalva :<\/strong><\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\">\n<ul class=\"wp-block-list\">\n<li>A FAPI egy ny\u00edlt bels\u0151 interf\u00e9sz a MAC \u00e9s PHY protokollok k\u00f6z\u00f6tt, amelynek seg\u00edt a szolg\u00e1ltat\u00f3knak \u00e9s h\u00e1l\u00f3zat integr\u00e1toroknak a k\u00fcl\u00f6nb\u00f6z\u0151 sz\u00e1ll\u00edt\u00f3kt\u00f3l sz\u00e1rmaz\u00f3 hardevreket \u00e9s szoftvereket kombin\u00e1lhassanak h\u00e1l\u00f3zatukban. A Small Cell\u00e1s rendszerben a FAPI bels\u0151 interf\u00e9szk\u00e9nt a k\u00f6zponti Small cellla \u00e9s a fizikai remote radio k\u00f6z\u00f6tt az nFAPI interf\u00e9sszel egy\u00fctt m\u0171k\u00f6dik. A macro cell\u00e1s hal\u00f3zatokban a 7-2-es feloszt\u00e1s szerint a DU MAC-PHY protokollok k\u00f6z\u00f6tti ny\u00edlt interf\u00e9szk\u00e9nt m\u0171k\u00f6dik.<\/li>\n\n\n\n<li>Az nFAPI egy ny\u00edlt h\u00e1l\u00f3zati interf\u00e9sz, amely a Small cell\u00e1s h\u00e1l\u00f3zat k\u00f6zponti egys\u00e9ge \u00e9s remote radio egys\u00e9ge k\u00f6z\u00f6tt biztos\u00edtja a kapcsolatot. Az nFAPI lehet\u0151v\u00e9 teszi a szolg\u00e1ltat\u00f3knak \u00e9s h\u00e1l\u00f3zat integr\u00e1toroknak a k\u00fcl\u00f6nb\u00f6z\u0151 gy\u00e1rt\u00f3kt\u00f3l sz\u00e1rmaz\u00f3 eszk\u00f6z\u00f6ket kombin\u00e1lva \u00e9p\u00edts\u00e9k vagy fejlessz\u00e9k a h\u00e1l\u00f3zatot.  Az nFAPI seg\u00edts\u00e9g\u00e9vel egy virtu\u00e1lis k\u00f6zponti small cella ak\u00e1r t\u00f6bb remote radio egys\u00e9ghez is kapcsol\u00f3dhat meyek m\u00e9s gy\u00e1rt\u00f3kt\u00f3l sz\u00e1rnaznak. Ezenk\u00edv\u00fcl a virtu\u00e1lis small cella\u00e1 komponenseket is k\u00e9pes elv\u00e1lasztani a fizikai h\u00e1l\u00f3zati egys\u00e9gekt\u0151l.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n\n\n\n<p><\/p>","protected":false},"excerpt":{"rendered":"<p>A hagyom\u00e1nyos RAN macro h\u00e1l\u00f3zatok CPRI vagy eCPRI fronthaul kapcsolatot haszn\u00e1lnak a baseband egys\u00e9g (BBU) \u00e9s a remote r\u00e1di\u00f3egys\u00e9g (RRU) k\u00f6z\u00f6tt. A CPRI ink\u00e1bb az LTE-ben m\u00edg az eCPRI az 5G h\u00e1l\u00f3zatokban gyakoribb fronthaul technol\u00f3gia. A small cell\u00e1k eset\u00e9ben a CPRI fronthaul technol\u00f3gia az a nagy s\u00e1vsz\u00e9less\u00e9g \u00e9s \u00e1lland\u00f3 bitsebess\u00e9g ig\u00e9nye miatt nem a legmegfelel\u0151bb. &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"https:\/\/www.xadv.eu\/hu\/2024\/04\/01\/fapi-vs-nfapi\/\"> <span class=\"screen-reader-text\">FAPI vs nFAPI<\/span> Read More &raquo;<\/a><\/p>","protected":false},"author":1,"featured_media":2311,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","footnotes":""},"categories":[20,88],"tags":[],"class_list":["post-2310","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-open-ran","category-small-cell"],"_links":{"self":[{"href":"https:\/\/www.xadv.eu\/hu\/wp-json\/wp\/v2\/posts\/2310","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.xadv.eu\/hu\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.xadv.eu\/hu\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.xadv.eu\/hu\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.xadv.eu\/hu\/wp-json\/wp\/v2\/comments?post=2310"}],"version-history":[{"count":3,"href":"https:\/\/www.xadv.eu\/hu\/wp-json\/wp\/v2\/posts\/2310\/revisions"}],"predecessor-version":[{"id":2864,"href":"https:\/\/www.xadv.eu\/hu\/wp-json\/wp\/v2\/posts\/2310\/revisions\/2864"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.xadv.eu\/hu\/wp-json\/wp\/v2\/media\/2311"}],"wp:attachment":[{"href":"https:\/\/www.xadv.eu\/hu\/wp-json\/wp\/v2\/media?parent=2310"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.xadv.eu\/hu\/wp-json\/wp\/v2\/categories?post=2310"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.xadv.eu\/hu\/wp-json\/wp\/v2\/tags?post=2310"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}