{"id":21775,"date":"2024-04-27T08:03:27","date_gmt":"2024-04-27T08:03:27","guid":{"rendered":"https:\/\/heylocate.mobi\/fr\/?post_type=termin&#038;p=21775"},"modified":"2024-07-26T13:26:14","modified_gmt":"2024-07-26T13:26:14","slug":"triangulation","status":"publish","type":"termin","link":"https:\/\/heylocate.mobi\/fr\/termin\/triangulation\/","title":{"rendered":"Triangulation"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\" id=\"Qu-est-ce-que-la-triangulation-des-t\u00e9l\u00e9phones-portables\">Qu&rsquo;est-ce que la triangulation des t\u00e9l\u00e9phones portables ?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">La triangulation des t\u00e9l\u00e9phones portables est une technique utilis\u00e9e pour d\u00e9terminer l&#8217;emplacement approximatif d&rsquo;un t\u00e9l\u00e9phone portable en analysant les signaux qu&rsquo;il \u00e9change avec les tours de t\u00e9l\u00e9phonie cellulaire \u00e0 proximit\u00e9. Ce terme est \u00e9galement connu sous le nom de triangulation de tours de t\u00e9l\u00e9phonie ou triangulation de t\u00e9l\u00e9phones mobiles.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"Comment-fonctionne-la-triangulation-\">Comment fonctionne la triangulation ?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">La triangulation des t\u00e9l\u00e9phones portables fonctionne en exploitant la g\u00e9om\u00e9trie form\u00e9e entre le t\u00e9l\u00e9phone portable et les tours de t\u00e9l\u00e9phonie autour, en utilisant des mesures de temps ou d&rsquo;angle pour calculer la position du t\u00e9l\u00e9phone dans le r\u00e9seau.<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Interception des signaux par les tours de t\u00e9l\u00e9phonie<\/strong><br>Lorsqu&rsquo;un t\u00e9l\u00e9phone portable re\u00e7oit un appel ou un SMS, il envoie et re\u00e7oit des signaux des tours de t\u00e9l\u00e9phonie cellulaire \u00e0 proximit\u00e9. Pour la localisation par triangulation, ces signaux doivent \u00eatre capt\u00e9s par au moins trois tours diff\u00e9rentes au sein du r\u00e9seau.<\/li>\n\n\n\n<li><strong>Mesure du temps ou de l&rsquo;angle<\/strong><br>Pour calculer l&#8217;emplacement, le temps ou l&rsquo;angle d&rsquo;arriv\u00e9e de ces signaux de t\u00e9l\u00e9phone portable sont mesur\u00e9s.<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Le Temps d&rsquo;Arriv\u00e9e (TOA)<\/strong> est le temps qu&rsquo;il faut pour qu&rsquo;un signal passe du t\u00e9l\u00e9phone portable \u00e0 chacune des tours de t\u00e9l\u00e9phonie. Comme la vitesse de d\u00e9placement du signal est connue, l&#8217;emplacement du t\u00e9l\u00e9phone portable peut ainsi \u00eatre calcul\u00e9.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>La Diff\u00e9rence de Temps d&rsquo;Arriv\u00e9e (TDOA)<\/strong> des signaux aux diff\u00e9rentes tours peut \u00e9galement aider \u00e0 d\u00e9terminer l&#8217;emplacement du t\u00e9l\u00e9phone portable.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>L&rsquo;Angle d&rsquo;Arriv\u00e9e (AOA)<\/strong> est l&rsquo;angle sous lequel le signal du t\u00e9l\u00e9phone portable arrive \u00e0 chaque tour. En connaissant ces angles, l&#8217;emplacement du t\u00e9l\u00e9phone portable peut \u00eatre pr\u00e9cis\u00e9 l\u00e0 o\u00f9 ces angles se croisent.<\/p>\n\n\n<section id=\"section-generated-banner-block_10be6f6aad96cd0873b9074537fca65a\" class=\"section block-section-generated-banner\">\n\t\r\n<!-- Responsive Display Ad TPN -->\r\n<ins class=\"adsbygoogle\" data-hl2-lazy=\"1\"\r\n     style=\"display:flex;justify-content: center;\"\r\n     data-ad-client=\"ca-pub-3100229280663156\"\r\n     data-ad-slot=\"3891667990\"\r\n     data-ad-format=\"auto\"\r\n     data-full-width-responsive=\"true\"><\/ins>\r\n<script>document.addEventListener(\"DOMContentLoaded\",function(){var c=\"ca-pub-3100229280663156\",L=0,io=new IntersectionObserver(function(es){es.forEach(function(e){if(!e.isIntersecting)return;io.unobserve(e.target);if(!L){L=1;var s=document.createElement(\"script\");s.async=true;s.crossOrigin=\"anonymous\";s.src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=\"+c;document.head.appendChild(s);}(window.adsbygoogle=window.adsbygoogle||[]).push({});});},{rootMargin:\"600px 0px\"});document.querySelectorAll(\"ins.adsbygoogle[data-hl2-lazy]\").forEach(function(i){io.observe(i);});});<\/script><\/section>\n\n\n\n<p class=\"wp-block-paragraph\">Des principes g\u00e9om\u00e9triques ou des algorithmes plus complexes tels que la trilat\u00e9ration (utilisant des distances) ou la multilat\u00e9ration (utilisant des diff\u00e9rences de temps) sont appliqu\u00e9s pour d\u00e9terminer l&#8217;emplacement pr\u00e9cis. L&rsquo;intersection de ces mesures aide \u00e0 cr\u00e9er une estimation plus pr\u00e9cise de l&#8217;emplacement du t\u00e9l\u00e9phone.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1920\" height=\"1767\" src=\"https:\/\/heylocate.mobi\/fr\/wp-content\/uploads\/sites\/4\/2024\/04\/triangulation-et-trilateration-dans-les-reseaux-cellulaires.jpg\" alt=\"Illustration comparative des techniques de triangulation et de trilat\u00e9ration utilis\u00e9es dans les r\u00e9seaux mobiles pour la localisation des combin\u00e9s \u00e0 l'aide des angles et des intersections des signaux provenant des tours de t\u00e9l\u00e9phonie cellulaire, avec une note explicative.\" class=\"wp-image-21778\" srcset=\"https:\/\/heylocate.mobi\/fr\/wp-content\/uploads\/sites\/4\/2024\/04\/triangulation-et-trilateration-dans-les-reseaux-cellulaires.jpg 1920w, https:\/\/heylocate.mobi\/fr\/wp-content\/uploads\/sites\/4\/2024\/04\/triangulation-et-trilateration-dans-les-reseaux-cellulaires-300x276.jpg 300w, https:\/\/heylocate.mobi\/fr\/wp-content\/uploads\/sites\/4\/2024\/04\/triangulation-et-trilateration-dans-les-reseaux-cellulaires-1087x1000.jpg 1087w, https:\/\/heylocate.mobi\/fr\/wp-content\/uploads\/sites\/4\/2024\/04\/triangulation-et-trilateration-dans-les-reseaux-cellulaires-768x707.jpg 768w\" sizes=\"auto, (max-width: 1920px) 100vw, 1920px\" \/><figcaption class=\"wp-element-caption\">Diagramme montrant les m\u00e9thodes de localisation d&rsquo;un combin\u00e9 mobile par triangulation et trilat\u00e9ration entre les tours de t\u00e9l\u00e9phonie cellulaire<\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"Pr\u00e9cision-de-la-triangulation\">Pr\u00e9cision de la triangulation<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">La pr\u00e9cision de la triangulation des t\u00e9l\u00e9phones portables peut \u00eatre affect\u00e9e par des facteurs tels que la densit\u00e9 des tours de t\u00e9l\u00e9phonie dans la zone et des variables environnementales comme les b\u00e2timents ou le terrain naturel qui pourraient obstruer les signaux. <strong>En pratique, la pr\u00e9cision de la triangulation des t\u00e9l\u00e9phones portables est :<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>d&rsquo;environ 50 \u00e0 100 m\u00e8tres dans les zones urbaines ;<\/li>\n\n\n\n<li>de 100 \u00e0 500 m\u00e8tres dans les zones suburbaines ;<\/li>\n\n\n\n<li>jusqu&rsquo;\u00e0 plusieurs kilom\u00e8tres dans les zones rurales, o\u00f9 il existe moins de tours de t\u00e9l\u00e9phonie.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Des algorithmes avanc\u00e9s peuvent compenser certaines impr\u00e9cisions en tenant compte de ces facteurs et en utilisant des points de donn\u00e9es suppl\u00e9mentaires ou des techniques de mod\u00e9lisation plus sophistiqu\u00e9es.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"Applications-en-t\u00e9l\u00e9communications\">Applications en t\u00e9l\u00e9communications<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">La triangulation est cruciale pour am\u00e9liorer la pr\u00e9cision et la fiabilit\u00e9 des syst\u00e8mes de communication. Elle est largement utilis\u00e9e dans diverses technologies, y compris la communication mobile et les syst\u00e8mes satellitaires :<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"Communication-mobile\">Communication mobile<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Dans les r\u00e9seaux mobiles, la triangulation aide \u00e0 d\u00e9terminer la position d&rsquo;un appareil mobile en fonction du retard du signal ou de l&rsquo;angle d&rsquo;arriv\u00e9e du signal provenant de diff\u00e9rentes tours de t\u00e9l\u00e9phonie. Elle est particuli\u00e8rement essentielle pour les services tels que les appels d&rsquo;urgence, o\u00f9 l&#8217;emplacement de l&rsquo;appelant doit \u00eatre d\u00e9termin\u00e9 de mani\u00e8re pr\u00e9cise et rapide.<\/p>\n\n\n<section id=\"section-generated-banner-block_10be6f6aad96cd0873b9074537fca65a\" class=\"section block-section-generated-banner\">\n\t\r\n<!-- Responsive Display Ad TPN -->\r\n<ins class=\"adsbygoogle\" data-hl2-lazy=\"1\"\r\n     style=\"display:flex;justify-content: center;\"\r\n     data-ad-client=\"ca-pub-3100229280663156\"\r\n     data-ad-slot=\"3891667990\"\r\n     data-ad-format=\"auto\"\r\n     data-full-width-responsive=\"true\"><\/ins>\r\n<\/section>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"Communication-par-satellite\">Communication par satellite<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Pour les syst\u00e8mes bas\u00e9s sur satellite, comme le <a href=\"https:\/\/heylocate.mobi\/fr\/termin\/gps\/\" target=\"_blank\" rel=\"noreferrer noopener\">GPS<\/a>, la triangulation est utilis\u00e9e pour calculer l&#8217;emplacement exact d&rsquo;un r\u00e9cepteur sur Terre en mesurant le temps qu&rsquo;il faut pour que les signaux de plusieurs satellites atteignent le r\u00e9cepteur.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Cette m\u00e9thode assure des services de navigation, de chronom\u00e9trage et de positionnement pr\u00e9cis, qui sont essentiels pour diverses applications, y compris la navigation a\u00e9rienne, maritime et terrestre.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"R\u00e9f\u00e9rences\">R\u00e9f\u00e9rences<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li><a href=\"https:\/\/en.wikipedia.org\/wiki\/Triangulation\" target=\"_blank\" rel=\"noreferrer noopener\">Triangulation<\/a> &#8211; Wikipedia<\/li>\n\n\n\n<li><a href=\"https:\/\/en.wikipedia.org\/wiki\/Trilateration\" target=\"_blank\" rel=\"noreferrer noopener\">Trilateration<\/a> &#8211; Wikipedia<\/li>\n\n\n\n<li><a href=\"https:\/\/en.wikipedia.org\/wiki\/Surveying\" target=\"_blank\" rel=\"noreferrer noopener\">Surveying<\/a> &#8211; Wikipedia<\/li>\n\n\n\n<li><a href=\"https:\/\/www.qrg.northwestern.edu\/projects\/vss\/docs\/navigation\/1-what-is-triangulation.html\" target=\"_blank\" rel=\"noreferrer noopener\">What is triangulation?<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/en.wikipedia.org\/wiki\/Triangulation_(geometry)\" target=\"_blank\" rel=\"noreferrer noopener\">Triangulation (geometry)<\/a> &#8211; Wikipedia<\/li>\n\n\n\n<li><a href=\"https:\/\/mathworld.wolfram.com\/Triangulation.html\" target=\"_blank\" rel=\"noreferrer noopener\">Triangulation<\/a> &#8211; from Wolfram MathWorld<\/li>\n\n\n\n<li><a href=\"https:\/\/www.maplesoft.com\/support\/help\/maple\/view.aspx?path=MathApps%2FTriangulation\" target=\"_blank\" rel=\"noreferrer noopener\">Triangulation<\/a> &#8211; Maple Help<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"<p>Qu&rsquo;est-ce que la triangulation des t\u00e9l\u00e9phones portables ? La triangulation des t\u00e9l\u00e9phones portables est une technique utilis\u00e9e pour d\u00e9terminer l&#8217;emplacement approximatif d&rsquo;un t\u00e9l\u00e9phone portable en analysant les signaux qu&rsquo;il \u00e9change avec les tours de t\u00e9l\u00e9phonie cellulaire \u00e0 proximit\u00e9. Ce terme&#8230;<\/p>\n","protected":false},"featured_media":0,"parent":0,"menu_order":0,"template":"","class_list":["post-21775","termin","type-termin","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Qu&#039;est-ce que la triangulation des t\u00e9l\u00e9phones portables ?<\/title>\n<meta name=\"description\" content=\"D\u00e9finition, signification et pr\u00e9cision de la triangulation par t\u00e9l\u00e9phone portable. 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