{"id":21922,"date":"2004-07-15T00:00:00","date_gmt":"2004-07-14T22:00:00","guid":{"rendered":"https:\/\/new.barcelonatribuna.com\/el_estrecho_ancho_de_banda\/"},"modified":"2004-07-15T00:00:00","modified_gmt":"2004-07-14T22:00:00","slug":"el_estrecho_ancho_de_banda","status":"publish","type":"post","link":"https:\/\/www.amicsdelpais.com\/es\/el_estrecho_ancho_de_banda\/","title":{"rendered":"El estrecho ancho de banda"},"content":{"rendered":"         <p class=\"link_ariadna\"><a href=\"https:\/\/www.amicsdelpais.com\/es\/publicaciones\">Publicaciones<\/a><\/p>                   <h1 class=\"wp-block-post-title\">El estrecho ancho de banda<\/h1>          <style>.kb-row-layout-id15198_fd4370-d2 > .kt-row-column-wrap{align-content:start;}:where(.kb-row-layout-id15198_fd4370-d2 > .kt-row-column-wrap) > .wp-block-kadence-column{justify-content:start;}.kb-row-layout-id15198_fd4370-d2 > .kt-row-column-wrap{column-gap:40px;row-gap:var(--global-kb-gap-md, 2rem);padding-top:0px;padding-bottom:24px;grid-template-columns:minmax(0, calc(70% - ((40px * 1 )\/2)))minmax(0, calc(30% - ((40px * 1 )\/2)));}.kb-row-layout-id15198_fd4370-d2 > .kt-row-layout-overlay{opacity:0.30;}@media all and (max-width: 1024px){.kb-row-layout-id15198_fd4370-d2 > .kt-row-column-wrap{grid-template-columns:minmax(0, 2fr) minmax(0, 1fr);}}@media all and (max-width: 767px){.kb-row-layout-id15198_fd4370-d2 > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr);}}<\/style><div class=\"kb-row-layout-wrap kb-row-layout-id15198_fd4370-d2 alignnone header_article_agenda wp-block-kadence-rowlayout\"><div class=\"kt-row-column-wrap kt-has-2-columns kt-row-layout-left-golden kt-tab-layout-inherit kt-mobile-layout-row kt-row-valign-top\">         <style>.kadence-column15198_b1d053-1d > .kt-inside-inner-col,.kadence-column15198_b1d053-1d > 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decoding=\"async\" width=\"839\" height=\"559\" src=\"https:\/\/www.amicsdelpais.com\/wp-content\/uploads\/2025\/07\/default_image_amics_del_pais-2.png\" class=\"attachment-post-thumbnail size-post-thumbnail wp-post-image\" alt=\"\" style=\"object-fit:cover;\" srcset=\"https:\/\/www.amicsdelpais.com\/wp-content\/uploads\/2025\/07\/default_image_amics_del_pais-2.png 839w, https:\/\/www.amicsdelpais.com\/wp-content\/uploads\/2025\/07\/default_image_amics_del_pais-2-300x200.png 300w, https:\/\/www.amicsdelpais.com\/wp-content\/uploads\/2025\/07\/default_image_amics_del_pais-2-768x512.png 768w, https:\/\/www.amicsdelpais.com\/wp-content\/uploads\/2025\/07\/default_image_amics_del_pais-2-600x400.png 600w\" sizes=\"auto, (max-width: 839px) 100vw, 839px\" \/><\/figure><\/div><\/div>                   <style>.kadence-column15494_3829e6-92 > .kt-inside-inner-col,.kadence-column15494_3829e6-92 > 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.kt-row-column-wrap{align-content:start;}:where(.kb-row-layout-id15198_57c2d8-c9 > .kt-row-column-wrap) > .wp-block-kadence-column{justify-content:start;}.kb-row-layout-id15198_57c2d8-c9 > .kt-row-column-wrap{column-gap:var(--global-kb-gap-md, 2rem);row-gap:var(--global-kb-gap-md, 2rem);padding-top:var(--global-kb-spacing-sm, 1.5rem);padding-bottom:var(--global-kb-spacing-sm, 1.5rem);grid-template-columns:minmax(0, calc(70% - ((var(--global-kb-gap-md, 2rem) * 1 )\/2)))minmax(0, calc(30% - ((var(--global-kb-gap-md, 2rem) * 1 )\/2)));}.kb-row-layout-id15198_57c2d8-c9 > .kt-row-layout-overlay{opacity:0.30;}@media all and (max-width: 1024px){.kb-row-layout-id15198_57c2d8-c9 > .kt-row-column-wrap{grid-template-columns:minmax(0, 2fr) minmax(0, 1fr);}}@media all and (max-width: 767px){.kb-row-layout-id15198_57c2d8-c9 > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr);}}<\/style><div class=\"kb-row-layout-wrap kb-row-layout-id15198_57c2d8-c9 alignnone content_article_agenda wp-block-kadence-rowlayout\"><div class=\"kt-row-column-wrap kt-has-2-columns kt-row-layout-left-golden kt-tab-layout-inherit kt-mobile-layout-row kt-row-valign-top\">         <style>.kadence-column15198_459565-82 > .kt-inside-inner-col,.kadence-column15198_459565-82 > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column15198_459565-82 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column15198_459565-82 > .kt-inside-inner-col{flex-direction:column;}.kadence-column15198_459565-82 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column15198_459565-82 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column15198_459565-82{position:relative;}@media all and (max-width: 1024px){.kadence-column15198_459565-82 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column15198_459565-82 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>         <div class=\"wp-block-kadence-column kadence-column15198_459565-82\">             <div class=\"kt-inside-inner-col\">             <div class=\"autor_post wp-block-post-author-name\"><a href=\"https:\/\/www.amicsdelpais.com\/es\/author\/javier-derqui\/\" target=\"_blank\" class=\"wp-block-post-author-name__link\">Javier Derqui Civera<\/a><\/div>             <div class=\"summary_post wp-block-post-excerpt\"><p class=\"wp-block-post-excerpt__excerpt\">\u00bfCuales son las contradicciones en el mundo de internet? \u00bfQu\u00e9 limitaciones tiene la banda ancha? <\/p><\/div>                           La difusi\u00f3 de l\u2019est\u00e0ndard IP de comunicaci\u00f3 digital permet enguany la difusi\u00f3 de continguts sobre diferents suports i subxarxes de transmissi\u00f3 de forma transparent al usuari.  El que ja no \u00e9s tant innocu \u00e9s el cost d\u2019aquestes xarxes, la seva velocitat de desplegament i el seu cost d\u2019amortitzaci\u00f3, com hem pogut comprovar aquests darrers anys.  Per\u00f2, el que sobretot no s\u2019est\u00e0 considerant \u00e9s l\u2019\u00fas que d\u2019elles se\u2019n fa.  Amb l\u2019actual explosi\u00f3 de continguts multim\u00e8dia en format digital disponibles a Internet, les xarxes requereixen d\u2019un ample de banda d\u2019acord amb el pes d\u2019aquests continguts (Mbytes, GBytes&#8230;), mentre que per mitj\u00e0 d\u2019elles el mercat est\u00e0 treballant amb plena naturalitat aparent.  On \u00e9s el desajust que fa que tants usuaris es queixin constantment de la qualitat (en realitat capacitat disponible) de les seves connexions a Internet? (m\u00f2dem, cable, ADSL,&#8230;.). La resposta es for\u00e7a evident i de f\u00e0cil soluci\u00f3 tecnol\u00f2gica, encara que \u00e9s per\u00f2 dif\u00edcil d\u2019acceptar per un mercat mal acostumat.  Apropem-nos al problema amb un exemple:  <endins>Imaginem-nos que igual que ha passat amb l\u2019aire condicionat, per algun invent inversemblant, augment\u00e9s la demanda d\u2019 instal\u00b7lacions de piscines a les nostres cases, pisos o apartaments. No podr\u00e0 \u00e9sser molt gran, de 10 m x 5 m x1,5 m. per exemple, o sigui 75&#215;106 cm3, en total 75.000 litres d\u2019aigua (750 hectolitres) per cadascuna.  Imaginem tamb\u00e9 que davant d\u2019aquesta meravellosa acumulaci\u00f3 d\u2019aigua i amb la calor que s\u2019apropa, un percentatge no menyspreable d\u2019usuaris del Servei d\u2019Aig\u00fces decid\u00eds omplir \u201csimult\u00e0niament\u201d la seva piscina particular.   Hi hauria dues conseq\u00fc\u00e8ncies immediates:  <ol><li>La pressi\u00f3 de la xarxa d\u2019aigua cauria amb poc menys del 5%d\u2019usuaris omplint la seva piscineta: aix\u00ed doncs nos ens arribaria aigua a cap usuari, amb o sense piscina  <li>Aquests usuaris a m\u00e9s rebran una fant\u00e0stica factura de consum d\u2019aigua. El contracte respon a l\u2019\u00fas habitual, per\u00f2 els blocs 2on , 3er, , etc. d\u2019hectolitres consumits, es dispararan exponencialment en la tarifa dom\u00e8stica.<\/ol>I aix\u00ed dues, tres o vint cops a la setmana, reomplint el doll&#8230;.<\/endins> Tornem ara a la realitat: les canonades son la xarxa, l\u2019aigua els continguts multimedia i el resultat semblant, amb la particularitat que l\u2019usuari actual m\u00e9s insatisfet \u00e9s el dom\u00e8stic (els nostres fills?) que, en un percentatge significatiu (5%?) i al marge d\u2019altres consideracions legals, no para de baixar-se m\u00fasica, pel\u00b7l\u00edcules i altres continguts multimedia, amb programes especialitzats ad-hoc (Kazaa, Winmax, eMule) amb m\u00faltiples sessions simult\u00e0nies 24h sobre 24 h &#8230;. i tranquils que ja s\u2019omplir\u00e0 la piscina&#8230;  Tot aix\u00f2 a m\u00e9s amb tarifa plana i sense cost de penalitzaci\u00f3 sobre l\u2019exc\u00e9s de consum. D\u2019aquesta manera la nostra connexi\u00f3 passa de 15 Kbps. a 10&#8230;.5&#8230;.2&#8230;.0 Kbps. .moment en que hem de trucar al suport t\u00e8cnic i, si contesta, perdre hores al tel\u00e8fon per no res.  La connectivitat IP en Banda Ample via sat\u00e8l\u00b7lit, t\u00e9 tres grans caracter\u00edstiques diferencials:  <endins><ol><li>Arriba a qualsevol punt geogr\u00e0fic dins la seva petjada de cobertura (des dels Urals a les Can\u00e0ries i des de les A\u00e7ores fins a l\u2019Iraq, en el cas d\u2019Operadors satel\u00b7litals europeus). <li>El seu temps d\u2019implantaci\u00f3 \u00e9s d\u2019una a dues setmanes. <li>Permet comunicacions un-a-un (unicast) o comunicacions un-a-molts (multicast) simult\u00e0niament. Dit d\u2019una altra manera, puc demanar un contingut multim\u00e8dia a trav\u00e9s de la meva comunicaci\u00f3 bidireccional unicast i la desc\u00e0rrega d\u2019aquest contingut es realitzaria per mi i per els milers (o milions) de sol\u00b7licitants comuns sobre el mateix ample de banda en una sola sessi\u00f3 multicast.<\/ol><\/endins>Per tant, el sat\u00e8l\u00b7lit com a mitj\u00e0 de comunicaci\u00f3 IP en Banda Ample, ja sigui com a xarxa prim\u00e0ria o secund\u00e0ria d\u2019una altra de terrestre, pel seu \u00fas en la difusi\u00f3 de continguts multim\u00e8dia, \u00e9s la xarxa m\u00e9s adient.  Plantegem-nos la seva utilitat en \u00e0mbits com l\u2019Administraci\u00f3 (Sanitat, Ensenyament&#8230;.), Companyies financeres (Banca i Assegurances), Companyies d\u2019Utilities,&#8230; per aplicacions de e-learning, videoconfer\u00e8ncia, seguretat , TVIP, SCADA, etc&#8230;  La tecnologia ja hi \u00e9s, el que falta \u00e9s una pol\u00edtica de continguts que siguin encarrilats per les xarxes de banda ample, satel\u00b7litals o altres&#8230;   Per\u00f2 aix\u00f2 ja \u00e9s una altra hist\u00f2ria.                                         <style>.kb-row-layout-id22850_b19245-db > .kt-row-column-wrap{align-content:start;}:where(.kb-row-layout-id22850_b19245-db > .kt-row-column-wrap) > .wp-block-kadence-column{justify-content:start;}.kb-row-layout-id22850_b19245-db > .kt-row-column-wrap{column-gap:var(--global-kb-gap-md, 2rem);row-gap:var(--global-kb-gap-md, 2rem);padding-top:24px;padding-bottom:0px;grid-template-columns:minmax(0, 1fr);}.kb-row-layout-id22850_b19245-db{background-color:#fecc8c;background-image:url('https:\/\/www.amicsdelpais.com\/wp-content\/uploads\/2025\/06\/bg_newsletter_01.svg');background-size:auto;background-position:100% 0%;background-attachment:scroll;background-repeat:repeat-y;}.kb-row-layout-id22850_b19245-db > .kt-row-layout-overlay{opacity:0.30;}@media all and (max-width: 1024px){.kb-row-layout-id22850_b19245-db > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr);}}@media all and (max-width: 767px){.kb-row-layout-id22850_b19245-db > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr);}}<\/style><div class=\"kb-row-layout-wrap kb-row-layout-id22850_b19245-db alignnone kt-row-has-bg block_newsletter wp-block-kadence-rowlayout\"><div class=\"kt-row-column-wrap kt-has-1-columns kt-row-layout-equal kt-tab-layout-inherit kt-mobile-layout-row kt-row-valign-top\">\n<style>.kadence-column22850_a01aca-24 > .kt-inside-inner-col{padding-bottom:0px;}.kadence-column22850_a01aca-24 > .kt-inside-inner-col,.kadence-column22850_a01aca-24 > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column22850_a01aca-24 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column22850_a01aca-24 > .kt-inside-inner-col{flex-direction:column;}.kadence-column22850_a01aca-24 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column22850_a01aca-24 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column22850_a01aca-24{position:relative;}@media all and (max-width: 1024px){.kadence-column22850_a01aca-24 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column22850_a01aca-24 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column22850_a01aca-24\"><div class=\"kt-inside-inner-col\">\n<h2 class=\"wp-block-heading\">Suscr\u00edbete al newsletter<\/h2>\n\n\n\n<p>Suscr\u00edbete al <strong>Newsletter de Amics del Pa\u00eds<\/strong> para estar al d\u00eda de todo lo que hacemos. 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\u00bfQu\u00e9 limitaciones tiene la banda ancha?<\/p>\n","protected":false},"author":47,"featured_media":19934,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","_price":"","_stock":"","_tribe_ticket_header":"","_tribe_default_ticket_provider":"","_tribe_ticket_capacity":"0","_ticket_start_date":"","_ticket_end_date":"","_tribe_ticket_show_description":"","_tribe_ticket_show_not_going":false,"_tribe_ticket_use_global_stock":"","_tribe_ticket_global_stock_level":"","_global_stock_mode":"","_global_stock_cap":"","_tribe_rsvp_for_event":"","_tribe_ticket_going_count":"","_tribe_ticket_not_going_count":"","_tribe_tickets_list":"[]","_tribe_ticket_has_attendee_info_fields":false,"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":"","footnotes":""},"categories":[194,732,735,193],"tags":[],"class_list":["post-21922","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-articulos","category-cercle-per-al-coneixement-publicaciones","category-circulo-para-el-conocimiento-publicaciones","category-publicaciones"],"taxonomy_info":{"category":[{"value":194,"label":"Art\u00edculos"},{"value":732,"label":"Cercle 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