{"id":2628,"date":"2024-04-12T20:01:01","date_gmt":"2024-04-12T20:01:01","guid":{"rendered":"https:\/\/www.xadv.eu\/?p=2628"},"modified":"2024-04-30T16:16:26","modified_gmt":"2024-04-30T16:16:26","slug":"virtualizalt-small-cellak-functionalis-split-opcioi","status":"publish","type":"post","link":"https:\/\/www.xadv.eu\/hu\/2024\/04\/12\/virtualizalt-small-cellak-functionalis-split-opcioi\/","title":{"rendered":"Virtualiz\u00e1lt Small Cell\u00e1k Function\u00e1lis Split Opci\u00f3i"},"content":{"rendered":"<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A virtualiz\u00e1ci\u00f3 m\u00e1r egy ideje ismert a mobil k\u00f6zponti h\u00e1l\u00f3zatokban (core network) \u00e9s a macro cell\u00e1s h\u00e1l\u00f3zatokban (cloud RAN), azonban a virtualiz\u00e1ci\u00f3 el\u0151nyei m\u00e9g kev\u00e9sb\u00e9 ismertek  a small cell\u00e1s h\u00e1l\u00f3zatokban.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A virtualiz\u00e1ci\u00f3val kapcsolatos szabv\u00e1nyok rendszerez\u00e9s\u00e9nek nagyobb r\u00e9sz\u00e9t az ETSI v\u00e9gzi, bele\u00e9rtve a virtualiz\u00e1ci\u00f3s use case-ek (felhaszn\u00e1l\u00e1si p\u00e9ld\u00e1k) meghat\u00e1roz\u00e1s\u00e1t. Ezek k\u00f6z\u00fcl k\u00fcl\u00f6n\u00f6sen a #6 sz\u00e1m\u00fa use case \u201eA mobil b\u00e1zis\u00e1llom\u00e1s virtualiz\u00e1l\u00e1sa\u201d \u00e9rdekes a small cell\u00e1s h\u00e1l\u00f3zat sz\u00e1m\u00e1ra. \u00c9rdemes a virtualiz\u00e1ci\u00f3s use case-ek bevezet\u00e9s\u00e9vel megn\u00e9zni, hogy ezek  hogyan hatnak a small cella k\u00fcl\u00f6nb\u00f6z\u0151 r\u00e9tegeinek \u00e9s funkci\u00f3inak virtualiz\u00e1l\u00e1s\u00e1ra.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A small cella virtualiz\u00e1ci\u00f3 sor\u00e1n a small cell\u00e1t k\u00e9t r\u00e9szre oszthat\u00f3: <\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-7387b849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:50%\">\n<ul class=\"wp-block-list\">\n<li>K\u00f6zponti small cella (Virtual Central Small Cell), ahol a funkci\u00f3k virtualiz\u00e1ltak<\/li>\n\n\n\n<li>Remote small cella, nem virtualiz\u00e1lt funkci\u00f3kkal<\/li>\n<\/ul>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:50%\">\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><img fetchpriority=\"high\" decoding=\"async\" width=\"410\" height=\"310\" src=\"https:\/\/www.xadv.eu\/wp-content\/uploads\/2024\/04\/virtual-small-cell-architecture-v32.jpg\" alt=\"\" class=\"wp-image-2630\" style=\"width:250px\" srcset=\"https:\/\/www.xadv.eu\/wp-content\/uploads\/2024\/04\/virtual-small-cell-architecture-v32.jpg 410w, https:\/\/www.xadv.eu\/wp-content\/uploads\/2024\/04\/virtual-small-cell-architecture-v32-300x227.jpg 300w, https:\/\/www.xadv.eu\/wp-content\/uploads\/2024\/04\/virtual-small-cell-architecture-v32-16x12.jpg 16w\" sizes=\"(max-width: 410px) 100vw, 410px\" \/><\/figure>\n<\/div>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Egy k\u00f6zponti small cella t\u00f6bb remote small cell\u00e1hoz is kapcsol\u00f3dhat. A small cell\u00e1s protocol layerek \u00e9s funkci\u00f3k fentr\u0151l lefel\u00e9 ir\u00e1nyul\u00f3 feloszt\u00e1sa sor\u00e1n fokozatosan t\u00f6bb funkci\u00f3 ker\u00fcl \u00e1t a remote small cell\u00e1b\u00f3l a k\u00f6zponti small cell\u00e1ba. Ezek a small cella feloszt\u00e1si pontok a k\u00f6vetkez\u0151 protokol layerek k\u00f6z\u00f6tt helyezkednek el:<\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-7387b849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:50%\">\n<ul class=\"wp-block-list\">\n<li>Centralized services<\/li>\n\n\n\n<li>Centralized RRC<\/li>\n\n\n\n<li>Centralized PDCP<\/li>\n\n\n\n<li>Centralized RLC<\/li>\n\n\n\n<li>Centralized MAC<\/li>\n\n\n\n<li>Centralized PHY<\/li>\n<\/ul>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:50%\">\n<figure class=\"wp-block-image size-full is-resized\"><img decoding=\"async\" width=\"283\" height=\"586\" src=\"https:\/\/www.xadv.eu\/wp-content\/uploads\/2024\/04\/functional-split-small-cell-all-v2.jpg\" alt=\"\" class=\"wp-image-2633\" style=\"width:150px\" srcset=\"https:\/\/www.xadv.eu\/wp-content\/uploads\/2024\/04\/functional-split-small-cell-all-v2.jpg 283w, https:\/\/www.xadv.eu\/wp-content\/uploads\/2024\/04\/functional-split-small-cell-all-v2-145x300.jpg 145w, https:\/\/www.xadv.eu\/wp-content\/uploads\/2024\/04\/functional-split-small-cell-all-v2-6x12.jpg 6w\" sizes=\"(max-width: 283px) 100vw, 283px\" \/><\/figure>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-7387b849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><\/p>\n<\/div>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">A feloszt\u00e1si pontok legfontosabb meghat\u00e1roz\u00f3ja a fronthaul interf\u00e9sz k\u00e9sleltet\u00e9s \u00e9s s\u00e1vsz\u00e9less\u00e9g k\u00f6vetelm\u00e9nyei. A fronthaul k\u00e9sleltet\u00e9si besorol\u00e1s\u00e1t meghat\u00e1roz\u00f3 intervallumok:<\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-7387b849 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>Ideal \u2013 250\u03bcs<\/li>\n\n\n\n<li>Near Ideal \u2013 2ms<\/li>\n\n\n\n<li>Sub Ideal \u2013 6ms<\/li>\n\n\n\n<li>Non Ideal \u2013 30ms<\/li>\n<\/ul>\n<\/div>\n<\/div>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>A virtualiz\u00e1lt small cella feloszt\u00e1si pontok<\/strong><\/h4>\n\n\n\n<h5 class=\"wp-block-heading\"><strong>Szolg\u00e1ltat\u00e1sok<\/strong><\/h5>\n\n\n\n<p class=\"wp-block-paragraph\">Ez a funkcion\u00e1lis split a virtualiz\u00e1lt small cella protokol funkci\u00f3it valasztja el a szolg\u00e1ltat\u00e1s funkci\u00f3kt\u00f3l. A small cell\u00e1s szolg\u00e1ltat\u00e1sok alkalmaz\u00e1s szolg\u00e1ltat\u00e1soknak min\u0151s\u00fclnek, mint p\u00e9ld\u00e1ul a tartalom gyors\u00edt\u00f3t\u00e1raz\u00e1s vagy platformszolg\u00e1ltat\u00e1sok. Ezek magukban foglalj\u00e1k az RRM-et \u00e9s a SON-t. A szolg\u00e1ltat\u00e1sok virtualiz\u00e1l\u00e1sa a sk\u00e1l\u00e1zhat\u00f3s\u00e1g \u00e9s a szolg\u00e1ltat\u00e1s telep\u00edt\u00e9sek rugalmass\u00e1g\u00e1nak el\u0151nyeit biztos\u00edtja, valamint az energiafogyaszt\u00e1s hat\u00e9konys\u00e1g\u00e1t \u00e9s a k\u00fcl\u00f6nb\u00f6z\u0151 gy\u00e1rt\u00f3kt\u00f3l sz\u00e1rmaz\u00f3 szolg\u00e1ltat\u00e1sok egyszer\u0171 integr\u00e1ci\u00f3j\u00e1t. Ez a feloszt\u00e1st az \u00f6sszes fronthaul k\u00e9sleltet\u00e9si besorol\u00e1ssal (ide\u00e1lis, k\u00f6zel ide\u00e1lis, szubide\u00e1lis \u00e9s nem ide\u00e1lis) t\u00e1mogatja. A s\u00e1vsz\u00e9less\u00e9g k\u00f6vetelm\u00e9nyek az S1 backhaul\u00e9n\u00e1l laz\u00e1bbak lehetnek. Ez viszonylag ritk\u00e1n alkamazott feloszt\u00e1sok k\u00f6z\u00e9 tartozik, hiszen ha a k\u00f6zponti small cella is virtualiz\u00e1lt akkor a szolg\u00e1ltat\u00e1s funkci\u00f3val egy\u00fctt is elhelyezhet\u0151 a virtu\u00e1lis k\u00f6rnyezetben.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><img decoding=\"async\" width=\"868\" height=\"193\" src=\"https:\/\/www.xadv.eu\/wp-content\/uploads\/2024\/04\/functional-split-small-cells-services.jpg\" alt=\"\" class=\"wp-image-2641\" style=\"width:500px\" srcset=\"https:\/\/www.xadv.eu\/wp-content\/uploads\/2024\/04\/functional-split-small-cells-services.jpg 868w, https:\/\/www.xadv.eu\/wp-content\/uploads\/2024\/04\/functional-split-small-cells-services-300x67.jpg 300w, https:\/\/www.xadv.eu\/wp-content\/uploads\/2024\/04\/functional-split-small-cells-services-768x171.jpg 768w, https:\/\/www.xadv.eu\/wp-content\/uploads\/2024\/04\/functional-split-small-cells-services-18x4.jpg 18w\" sizes=\"(max-width: 868px) 100vw, 868px\" \/><\/figure>\n\n\n\n<h5 class=\"wp-block-heading\">RRC-PDCP<\/h5>\n\n\n\n<p class=\"wp-block-paragraph\">Ez a funkcion\u00e1lis split a virtualiz\u00e1lt small cella RRC \u00e9s PDCP protokolok k\u00f6z\u00f6tt valasztja el a small cella funkci\u00f3kat. Az RRC virtualiz\u00e1l\u00e1sa megk\u00f6nny\u00edti a jelszint m\u00e9r\u00e9si riportok k\u00f6zponti rendszerez\u00e9s\u00e9t , valamint a mobilit\u00e1s management algoritmusok testreszab\u00e1s\u00e1t az \u00fczleti k\u00f6vetelm\u00e9nyeknek megfelel\u0151en. Ez a feloszt\u00e1s, elv\u00e1laszt\u00e1st biztos\u00edt a control plane \u00e9s user plane k\u00f6z\u00f6tt, lehet\u0151v\u00e9 t\u00e9ve, hogy a user plane IP-csomagjai k\u00f6zvetlen\u00fcl juthassanak el a c\u00e9ljukhoz an\u00e9lk\u00fcl, hogy \u00e1thaladn\u00e1nak a k\u00f6zponti virtualiz\u00e1lt platformon. Ezt a megold\u00e1s az \u00f6sszes fronthaul k\u00e9sleltet\u00e9si besorol\u00e1s (ide\u00e1lis, k\u00f6zel ide\u00e1lis, szubide\u00e1lis \u00e9s nem ide\u00e1lis) t\u00e1mogatja. A s\u00e1vsz\u00e9less\u00e9g k\u00f6vetelm\u00e9nyek sokkal laz\u00e1bbak lehetnek, mint az S1 backhauln\u00e1l. Ez a feloszt\u00e1si m\u00f3d az alacsony k\u00e9sleltet\u00e9st ig\u00e9nyl\u0151 use case-ek t\u00e1mogat\u00e1s\u00e1ra alkalmasabb.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"866\" height=\"189\" src=\"https:\/\/www.xadv.eu\/wp-content\/uploads\/2024\/04\/functional-split-small-cells-RRC-pdcp.jpg\" alt=\"\" class=\"wp-image-2640\" style=\"width:500px\" srcset=\"https:\/\/www.xadv.eu\/wp-content\/uploads\/2024\/04\/functional-split-small-cells-RRC-pdcp.jpg 866w, https:\/\/www.xadv.eu\/wp-content\/uploads\/2024\/04\/functional-split-small-cells-RRC-pdcp-300x65.jpg 300w, https:\/\/www.xadv.eu\/wp-content\/uploads\/2024\/04\/functional-split-small-cells-RRC-pdcp-768x168.jpg 768w, https:\/\/www.xadv.eu\/wp-content\/uploads\/2024\/04\/functional-split-small-cells-RRC-pdcp-18x4.jpg 18w\" sizes=\"(max-width: 866px) 100vw, 866px\" \/><\/figure>\n\n\n\n<h5 class=\"wp-block-heading\">PDCP-RLC<\/h5>\n\n\n\n<p class=\"wp-block-paragraph\">Ez a funkcion\u00e1lis split a virtualiz\u00e1lt small cella RLC \u00e9s PDCP protokolok k\u00f6z\u00f6tt valasztja el a small cella funkci\u00f3kat. A PDCP \u00e9s RRC layerek virtualiz\u00e1l\u00e1sa el\u0151nyt jelent a remote small cell\u00e1k k\u00f6z\u00f6tti mobilit\u00e1sn\u00e1l, amennyiben a remote small cell\u00e1k ugyanazt a k\u00f6zponti small cell\u00e1t haszn\u00e1lj\u00e1k virtualiz\u00e1lt funkci\u00f3ikhoz mert ez\u00e1ltal sz\u00fcks\u00e9gtelenn\u00e9 v\u00e1lik k\u00f6z\u00f6tt\u00fck az adat forwarding funkci\u00f3. Ezt a megold\u00e1s az \u00f6sszes fronthaul k\u00e9sleltet\u00e9si besorol\u00e1s (ide\u00e1lis, k\u00f6zel ide\u00e1lis, szubide\u00e1lis \u00e9s nem ide\u00e1lis) t\u00e1mogatja. A fronthaul s\u00e1vsz\u00e9less\u00e9g k\u00f6vetelm\u00e9nyei hasonl\u00f3ak az S1 backhaul k\u00f6vetelm\u00e9nyeihez. Ez a feloszt\u00e1si m\u00f3d az alacsony k\u00e9sleltet\u00e9st ig\u00e9nyl\u0151 use case-ek t\u00e1mogat\u00e1s\u00e1ra alkalmasabb.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"865\" height=\"194\" src=\"https:\/\/www.xadv.eu\/wp-content\/uploads\/2024\/04\/functional-split-small-cells-pdcp-rlc.jpg\" alt=\"\" class=\"wp-image-2637\" style=\"width:500px\" srcset=\"https:\/\/www.xadv.eu\/wp-content\/uploads\/2024\/04\/functional-split-small-cells-pdcp-rlc.jpg 865w, https:\/\/www.xadv.eu\/wp-content\/uploads\/2024\/04\/functional-split-small-cells-pdcp-rlc-300x67.jpg 300w, https:\/\/www.xadv.eu\/wp-content\/uploads\/2024\/04\/functional-split-small-cells-pdcp-rlc-768x172.jpg 768w, https:\/\/www.xadv.eu\/wp-content\/uploads\/2024\/04\/functional-split-small-cells-pdcp-rlc-18x4.jpg 18w\" sizes=\"(max-width: 865px) 100vw, 865px\" \/><\/figure>\n\n\n\n<h5 class=\"wp-block-heading\">RLC-MAC<\/h5>\n\n\n\n<p class=\"wp-block-paragraph\">Ez a funkcion\u00e1lis split a virtualiz\u00e1lt small cella RLC \u00e9s MAC protokolok k\u00f6z\u00f6tt valasztja el a small cella funkci\u00f3kat. A virtualiz\u00e1ci\u00f3 k\u00f6vetkez\u0151 szintje az RLC r\u00e9teg funkci\u00f3inak \u00e1thelyez\u00e9se a remote cell\u00e1b\u00f3l a k\u00f6zponti small cell\u00e1ba. Ez n\u00f6veli a sk\u00e1l\u00e1zhat\u00f3 funkci\u00f3k sz\u00e1m\u00e1t, \u00e9s a load balance-ot is, de bonyolultabb\u00e1 is teszi azt, mivel a DL RLC r\u00e9teg szorosan kapcsol\u00f3dik mind a MAC-hoz, mind az scheduler-hez. Ez\u00e9rt flow control sz\u00fcks\u00e9ges az RLC \u00e9s a MAC sz\u00e9tv\u00e1laszt\u00e1s\u00e1n\u00e1l. Ezt a feloszt\u00e1st az ide\u00e1lis, a k\u00f6zel ide\u00e1lis \u00e9s a szubide\u00e1lis fronthaul t\u00e1mogatja megfelel\u0151en, \u00e9s egy S1 backhaulhoz hasonl\u00f3 fronthaul s\u00e1vsz\u00e9less\u00e9get ig\u00e9nyel. Ez a feloszt\u00e1si m\u00f3d az \u00f6sszetettebb koordin\u00e1l\u00e1st ig\u00e9nyl\u0151 use case-ek t\u00e1mogat\u00e1s\u00e1ra alkalmasabb.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"873\" height=\"194\" src=\"https:\/\/www.xadv.eu\/wp-content\/uploads\/2024\/04\/functional-split-small-cells-rlc-mac.jpg\" alt=\"\" class=\"wp-image-2639\" style=\"width:500px\" srcset=\"https:\/\/www.xadv.eu\/wp-content\/uploads\/2024\/04\/functional-split-small-cells-rlc-mac.jpg 873w, https:\/\/www.xadv.eu\/wp-content\/uploads\/2024\/04\/functional-split-small-cells-rlc-mac-300x67.jpg 300w, https:\/\/www.xadv.eu\/wp-content\/uploads\/2024\/04\/functional-split-small-cells-rlc-mac-768x171.jpg 768w, https:\/\/www.xadv.eu\/wp-content\/uploads\/2024\/04\/functional-split-small-cells-rlc-mac-18x4.jpg 18w\" sizes=\"(max-width: 873px) 100vw, 873px\" \/><\/figure>\n\n\n\n<h5 class=\"wp-block-heading\">MAC Split<\/h5>\n\n\n\n<p class=\"wp-block-paragraph\">Ez a funkcion\u00e1lis split a virtualiz\u00e1lt small cella MAC protokolj\u00e1n bel\u00fcl valasztja el a funkci\u00f3kat. A DL RLC \u00e9s MAC r\u00e9tegek sz\u00e9tv\u00e1laszt\u00e1s\u00e1nak alternat\u00edv m\u00f3dja a MAC feloszt\u00e1sa. Itt a MAC layer nagy r\u00e9sze a k\u00f6zponti small cell\u00e1n virtualiz\u00e1l\u00f3dik, de a HARQ scheduling a remote small cell\u00e1ban marad. A scheduling funkci\u00f3 virtualiz\u00e1l\u00e1s\u00e1nak el\u0151nye a remote small cell\u00e1k k\u00f6z\u00f6tti gyorsabb \u00e9s pontosabb koordin\u00e1ci\u00f3. Ez a megold\u00e1s \u00e9s ugyanazokat a fronthaul k\u00e9sleltet\u00e9si \u00e9s s\u00e1vsz\u00e9less\u00e9gi k\u00f6vetelm\u00e9nyeket eredm\u00e9nyezi. Ez a feloszt\u00e1si m\u00f3d az \u00f6sszetettebb koordin\u00e1l\u00e1st ig\u00e9nyl\u0151 use case-ek t\u00e1mogat\u00e1s\u00e1ra alkalmasabb.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"873\" height=\"193\" src=\"https:\/\/www.xadv.eu\/wp-content\/uploads\/2024\/04\/functional-split-small-cells-mac-split.jpg\" alt=\"\" class=\"wp-image-2636\" style=\"width:500px\" srcset=\"https:\/\/www.xadv.eu\/wp-content\/uploads\/2024\/04\/functional-split-small-cells-mac-split.jpg 873w, https:\/\/www.xadv.eu\/wp-content\/uploads\/2024\/04\/functional-split-small-cells-mac-split-300x66.jpg 300w, https:\/\/www.xadv.eu\/wp-content\/uploads\/2024\/04\/functional-split-small-cells-mac-split-768x170.jpg 768w, https:\/\/www.xadv.eu\/wp-content\/uploads\/2024\/04\/functional-split-small-cells-mac-split-18x4.jpg 18w\" sizes=\"(max-width: 873px) 100vw, 873px\" \/><\/figure>\n\n\n\n<h5 class=\"wp-block-heading\">MAC-PHY<\/h5>\n\n\n\n<p class=\"wp-block-paragraph\">Ez a funkcion\u00e1lis split a virtualiz\u00e1lt small cella PHY \u00e9s MAC protokolok k\u00f6z\u00f6tt valasztja el a small cella funkci\u00f3kat. A small cella funkci\u00f3k tov\u00e1bbi virtualiz\u00e1l\u00e1s\u00e1nak eredm\u00e9nye, hogy a k\u00f6zponti small cella az LTE HARQ ciklusban is r\u00e9szt vesz, ahol a remote small cell\u00e1nak 4 ms ideje van az UL sub-frame fogad\u00e1s\u00e1ra \u00e9s DL-en a v\u00e1laszad\u00e1sra. Ez a feloszt\u00e1s funkcion\u00e1lisan egyszer\u0171, mivel az \u00f6sszes L3 \u00e9s L2 funkci\u00f3 a k\u00f6zponti small cell\u00e1ban, az PHY L1 pedig a remote small cell\u00e1ban tal\u00e1lhat\u00f3. A HARQ ciklus szigor\u00fa k\u00e9sleltet\u00e9si korl\u00e1toz\u00e1sokat k\u00f6vetel meg a fronthaulon. Ez\u00e9rt ez a megold\u00e1s a HARQ interleaving technik\u00e1val ide\u00e1lis \u00e9s k\u00f6zel ide\u00e1lis fronthaul-al is t\u00e1mogathat\u00f3, egy\u00e9bk\u00e9nt csak ide\u00e1lis fronthaul-al. A HARQ interleaving h\u00e1tr\u00e1nya azonban, hogy cs\u00f6kkenti a maxim\u00e1lis adatsebess\u00e9get. A fronthaul s\u00e1vsz\u00e9less\u00e9g k\u00f6vetelm\u00e9nyei hasonl\u00f3ak az S1 backhaulhoz. Ez a feloszt\u00e1si m\u00f3d k\u00edn\u00e1lja a legmegfelel\u0151bb egyens\u00fajt a koordin\u00e1ci\u00f3t \u00e9s adatsebess\u00e9get is ig\u00e9nyl\u0151 use case-ek sz\u00e1m\u00e1ra.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"871\" height=\"199\" src=\"https:\/\/www.xadv.eu\/wp-content\/uploads\/2024\/04\/functional-split-small-cells-mac-phy.jpg\" alt=\"\" class=\"wp-image-2635\" style=\"width:500px\" srcset=\"https:\/\/www.xadv.eu\/wp-content\/uploads\/2024\/04\/functional-split-small-cells-mac-phy.jpg 871w, https:\/\/www.xadv.eu\/wp-content\/uploads\/2024\/04\/functional-split-small-cells-mac-phy-300x69.jpg 300w, https:\/\/www.xadv.eu\/wp-content\/uploads\/2024\/04\/functional-split-small-cells-mac-phy-768x175.jpg 768w, https:\/\/www.xadv.eu\/wp-content\/uploads\/2024\/04\/functional-split-small-cells-mac-phy-18x4.jpg 18w\" sizes=\"(max-width: 871px) 100vw, 871px\" \/><\/figure>\n\n\n\n<h5 class=\"wp-block-heading\">PHY<\/h5>\n\n\n\n<p class=\"wp-block-paragraph\">Ez a funkcion\u00e1lis split a virtualiz\u00e1lt small cella PHY protokolj\u00e1n bel\u00fcl valasztja el a funkci\u00f3kat. Ez a megold\u00e1s az PHY L1 funkci\u00f3k virtualiz\u00e1l\u00e1s\u00e1t is a k\u00f6zponti small cell\u00e1ba helyezi, ami az er\u0151forr\u00e1s megoszt\u00e1sban \u00e9s a adatforgalom eloszt\u00e1sban tov\u00e1bbi el\u0151nyt jelent. A PHY protocol feloszt\u00e1s\u00e1ra t\u00f6bb opci\u00f3 is l\u00e9tezik, amelyek k\u00fcl\u00f6nb\u00f6z\u0151 el\u0151ny\u00f6ket eredm\u00e9nyeznek a k\u00f6zponti cell\u00e1ban, \u00e9s elt\u00e9r\u0151 fronthaul s\u00e1vsz\u00e9less\u00e9g ig\u00e9nyeket t\u00e1masztanak. Min\u00e9l t\u00f6bb PHY funkci\u00f3 van virtualiz\u00e1lva, ann\u00e1l nagyobb a fronthaul s\u00e1vsz\u00e9less\u00e9g ig\u00e9ny. A t\u00e1mogatott fronthaul latency megegyezik a MAC-PHY feloszt\u00e1s\u00e9val, (ide\u00e1lis \u00e9s k\u00f6zel ide\u00e1lis) HARQ interleaving haszn\u00e1lat\u00e1val egy\u00e9bk\u00e9nt csak ide\u00e1lis fronthaul latency t\u00e1mogatott. Ez a feloszt\u00e1si m\u00f3d a nagy adatsebess\u00e9get ig\u00e9nyl\u0151 use case-ek t\u00e1mogat\u00e1s\u00e1ra alkalmasabb.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"877\" height=\"191\" src=\"https:\/\/www.xadv.eu\/wp-content\/uploads\/2024\/04\/functional-split-small-cells-phy-split-1.jpg\" alt=\"\" class=\"wp-image-2643\" style=\"width:500px\" srcset=\"https:\/\/www.xadv.eu\/wp-content\/uploads\/2024\/04\/functional-split-small-cells-phy-split-1.jpg 877w, https:\/\/www.xadv.eu\/wp-content\/uploads\/2024\/04\/functional-split-small-cells-phy-split-1-300x65.jpg 300w, https:\/\/www.xadv.eu\/wp-content\/uploads\/2024\/04\/functional-split-small-cells-phy-split-1-768x167.jpg 768w, https:\/\/www.xadv.eu\/wp-content\/uploads\/2024\/04\/functional-split-small-cells-phy-split-1-18x4.jpg 18w\" sizes=\"(max-width: 877px) 100vw, 877px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading has-ast-global-color-1-color has-text-color has-link-color wp-elements-8f1d485a7f697eceb56e5040904e47d9\"><\/h2>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>Melyik feloszt\u00e1si pont<\/strong> a legalkalmasabb a Small Cell\u00e1kn\u00e1l?<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">A fenti estek mindegyik\u00e9nek megvan az el\u0151nye \u00e9s h\u00e1tr\u00e1nya egyar\u00e1nt. Ahogy l\u00e1that\u00f3, min\u00e9l t\u00f6bb funkci\u00f3 ker\u00fcl virtualiz\u00e1l\u00e1sra a small cell\u00e1ban ann\u00e1l nagyobbak a fronthaul ir\u00e1nti k\u00f6vetelm\u00e9nyek mind latency mind s\u00e1vsz\u00e9less\u00e9g ter\u00e9n. Viszont min\u00e9l t\u00f6bb funkci\u00f3 ker\u00fcl virtualiz\u00e1l\u00e1sra a small cell\u00e1ban ann\u00e1l nagyobb a k\u00f6zpontos\u00edt\u00e1s miatti flexibilit\u00e1s \u00e9s gyorsas\u00e1g, \u00e1tl\u00e1that\u00f3bbak \u00e9s koordin\u00e1lhat\u00f3bbak a funkci\u00f3k.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A leggyakrabban alkalmazott feloszt\u00e1si opci\u00f3 a MAC-PHY az \u00f6sszes lehet\u0151s\u00e9g k\u00f6z\u00fcl mivel ez k\u00edn\u00e1lja a legjobb egyens\u00fajt a fronthaul k\u00f6vetelm\u00e9nyek \u00e9s az adatsebess\u00e9g k\u00f6z\u00f6tt. Ma a legt\u00f6bb gy\u00e1rt\u00f3 \u00e9s SW fejleszt\u0151 is ezt a feloszt\u00e1si pontot tartja referenci\u00e1nak. Ett\u0151l elt\u00e9r\u0151 megold\u00e1sok is t\u00e1mogatottak term\u00e9szetesen, mint p\u00e9ld\u00e1ul a PHY split, ami a 7.x feloszt\u00e1si opci\u00f3, ahol az &#8220;x&#8221; a PHY protocolon bel\u00fcli feloszt\u00e1si lehet\u0151s\u00e9geket szimboliz\u00e1lja. Attol f\u00fcgg\u0151en, hogy hol t\u00f6rt\u00e9nik a feloszt\u00e1s a PHY-n bel\u00fcl lehet 7-1 vagy 7-2 vagy 7-3 opci\u00f3. Ezekr\u0151l az opci\u00f3kr\u00f3l egy m\u00e1sik \u00edr\u00e1sban lesz sz\u00f3 r\u00e9szletesen.<\/p>","protected":false},"excerpt":{"rendered":"<p>A virtualiz\u00e1ci\u00f3 m\u00e1r egy ideje ismert a mobil k\u00f6zponti h\u00e1l\u00f3zatokban (core network) \u00e9s a macro cell\u00e1s h\u00e1l\u00f3zatokban (cloud RAN), azonban a virtualiz\u00e1ci\u00f3 el\u0151nyei m\u00e9g kev\u00e9sb\u00e9 ismertek a small cell\u00e1s h\u00e1l\u00f3zatokban. A virtualiz\u00e1ci\u00f3val kapcsolatos szabv\u00e1nyok rendszerez\u00e9s\u00e9nek nagyobb r\u00e9sz\u00e9t az ETSI v\u00e9gzi, bele\u00e9rtve a virtualiz\u00e1ci\u00f3s use case-ek (felhaszn\u00e1l\u00e1si p\u00e9ld\u00e1k) meghat\u00e1roz\u00e1s\u00e1t. Ezek k\u00f6z\u00fcl k\u00fcl\u00f6n\u00f6sen a #6 sz\u00e1m\u00fa use &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"https:\/\/www.xadv.eu\/hu\/2024\/04\/12\/virtualizalt-small-cellak-functionalis-split-opcioi\/\"> <span class=\"screen-reader-text\">Virtualiz\u00e1lt Small Cell\u00e1k Function\u00e1lis Split Opci\u00f3i<\/span> Read More &raquo;<\/a><\/p>","protected":false},"author":1,"featured_media":2634,"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":"disabled","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-2628","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\/2628","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=2628"}],"version-history":[{"count":4,"href":"https:\/\/www.xadv.eu\/hu\/wp-json\/wp\/v2\/posts\/2628\/revisions"}],"predecessor-version":[{"id":2729,"href":"https:\/\/www.xadv.eu\/hu\/wp-json\/wp\/v2\/posts\/2628\/revisions\/2729"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.xadv.eu\/hu\/wp-json\/wp\/v2\/media\/2634"}],"wp:attachment":[{"href":"https:\/\/www.xadv.eu\/hu\/wp-json\/wp\/v2\/media?parent=2628"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.xadv.eu\/hu\/wp-json\/wp\/v2\/categories?post=2628"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.xadv.eu\/hu\/wp-json\/wp\/v2\/tags?post=2628"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}