\u00ab\u00a0Optimisation de la transmission de la phonie et vid\u00e9ophonie sur les r\u00e9seaux \u00e0 larges bandes PMR\u00a0\u00bb. <\/strong><\/p>\n Cette th\u00e8se a \u00e9t\u00e9 r\u00e9alis\u00e9e sous la direction de Pr. Djamal ZEGHLACHE et encadr\u00e9e acad\u00e9miquement par Dr. Hang NGUYEN . B\u00e9n\u00e9ficiant d’un contrat CIFRE chez CASSIDIAN<\/strong>, la th\u00e8se a \u00e9t\u00e9 encadr\u00e9e industriellement par M. Laurent MARTINOD et M. Philippe MEGE. <\/p>\n Date de la soutenance : Le jury est compos\u00e9 de :<\/p>\n – Rapporteurs :<\/strong><\/p>\n Pr. Fumiyuki ADACHI , Professeur Em\u00e9rite \u00e0 l\u2019Universit\u00e9 de Tohoku, Pr. Djamal Zeghlache, Professeur \u00e0 Telecom SudParis, R\u00e9sum\u00e9 de th\u00e8se :<\/strong><\/p>\n Cet expos\u00e9 analyse les perspectives large bande des r\u00e9seaux PMR, \u00e0 travers l’\u00e9valuation du candidat LTE, et la proposition d’une possible \u00e9volution du codage canal, la solution brevet\u00e9e des codes turbo \u00e0 protection non uniforme. <\/p>\n Une premi\u00e8re \u00e9tude dans le chapitre 2 se concentre sur l’analyse multi-couche et l’identification des probl\u00e8mes cl\u00e9 des communications de voix et de vid\u00e9o sur un r\u00e9seau LTE professionel. Les capacit\u00e9s voix et vid\u00e9o sont estim\u00e9es pour les liens montant et descendant de la transmission LTE, et l’efficacit\u00e9 spectrale de la voix en lien descendant est compar\u00e9e \u00e0 celle de PMR et GSM. <\/p>\n Ce chapitre souligne certains points cl\u00e9 de l’\u00e9volution de LTE. S’ils etaient pas r\u00e9solus par la suite, LTE se verrait perdre de sa cr\u00e9dibilit\u00e9 en tant que candidat \u00e0 l’\u00e9volution de la PMR. Une telle caract\u00e9ristique cl\u00e9 des r\u00e9seaux PMR est le codage canal \u00e0 protection non uniforme, qui pourrait \u00eatre adapt\u00e9 au syst\u00e8me LTE pour une \u00e9volution aux contraintes de la s\u00e9curit\u00e9 publique. <\/p>\n Le chapitre 3 introduit cette proposition d’\u00e9volution, qui a \u00e9t\u00e9 brevet\u00e9e: les turbo codes \u00e0 protection non uniforme integr\u00e9e. Nous proposons une nouvelle approche pour le codage canal \u00e0 protection non uniforme \u00e0 travers les codes turbo progressives hierarchiques. Les configurations parall\u00e8les et s\u00e9ries sont analys\u00e9es. Les m\u00e9canismes de protection non uniformes sont integr\u00e9s dans la structure de l’encodeur m\u00eame \u00e0 travers l’insertion progressif et hierarchique de nouvelles donn\u00e9es de l’utilisateur. Enfin, dans le chapitre 4, l’id\u00e9e brevet\u00e9 du code turbo parallal progressif et hierarchique (PPHTC) est \u00e9valu\u00e9e sur la plateforme LTE. Une description d\u00e9taill\u00e9e de l’architecture des bearers de LTE est donn\u00e9e, et ses cons\u00e9quences sont discut\u00e9es. Le nouveau codage canal est ins\u00e9r\u00e9 et \u00e9valu\u00e9 sur cette plateforme, et ses performances sont compar\u00e9es avec des sch\u00e9mas de transmission typique \u00e0 LTE. L’analyse de la qualit\u00e9 de la voix aide \u00e0 conclure sur l’efficacit\u00e9 de la solution propos\u00e9e dans un syst\u00e8me de transmission r\u00e9el. <\/p>\n Pourtant, m\u00eame si cette derni\u00e8re donne les meilleurs r\u00e9sultats, d’avantage d’optimisations devraient \u00eatre envisag\u00e9es pour obtenir des gains am\u00e9lior\u00e9s et mieux exploiter le potentiel du codage propos\u00e9. L’expos\u00e9 se conclut dans le chapitre 5 et une courte discussion pr\u00e9sente les futures perspectives de recherche.<\/p>\n Abstract :<\/strong><\/p>\n This dissertation analyzes the PMR broadband perspectives, through the evaluation of the preferred candidate, LTE, and the proposal of a possible channel coding evolution, the patented solution of unequal error protection embedded turbo codes. A first study in chapter 2 focuses on the multi-layer analysis and the identification of key issues for professional-like LTE for voice and video communications. The voice and video capacities are estimated for both downlink and uplink LTE transmissions, and the downlink LTE voice system efficiency is compared with that of the PMR and Global System for Mobile Communications (GSM). This chapter helps highlighting some of the key points. If not resolved, the latter could lead to the LTE downfall as a candidate for the PMR evolution. One such key characteristic of PMR systems is the unequal error protection<\/p>\n channel coding technique, which might be adapted to the LTE technology for its evolution to public safety requirements. Chapter 3 further introduces the proposed evolution patented ideas: the unequal error protection embedded turbo codes. We propose a new approach for the unequal error protection channel coding through<\/p>\n the progressive hierarchical turbo codes. Both parallel and serial turbo configurations are closely studied. The unequal error protection mechanisms are embedded in the encoder\u2019s structure itself through the progressive and hierarchical insertion of new data. The turbo decoding is modified as to optimally exploit the progressive<\/p>\n insertion of information in the encoding process and hierarchically estimate the corresponding data. Both parallel and serial configurations\u2019 properties are analyzed using an analogy with a pilot code behavior, as well as a zoom on the weight error functions coefficients. The virtual code rate and factor graph interpretations also<\/p>\n provide a better insight on the code properties. The code possible gains are highlighted through computer simulations in both static and dynamic transmission environements, by using carefully chosen benchmarks. Finally, in chapter 4, the patented idea of parallel progressive hierarchical turbo codes (PPHTC) is evaluated over the<\/p>\n LTE platform. A detailed description is given of the voice transmission bearer architecture over LTE, and its consequences are discussed. The new channel code is inserted and evaluated over this platform and its performances compared with the existent LTE transmission schemes. The voice quality results help concluding on the<\/p>\n efficiency of the proposed solution in a real transmission scenario. However, even though the newly presented solution gives the best results, further system optimizations should be envisaged for obtaining better gains and exploit the parallel progressive hierarchical turbo codes potential. The dissertation concludes in chapter 5 and<\/p>\n a short discussion is given on future research perspectives.<\/p>\n THESE DE DOCTORAT Alina Alexandra FLOREA D\u00e9partement RS2M – T\u00e9l\u00e9com SudParis – Universit\u00e9 Pierre et Marie Curie – EDITE (Ecole Doctorale Informatique, T\u00e9l\u00e9communications, Electronique) \u00ab\u00a0Optimisation de la transmission de la phonie et vid\u00e9ophonie sur les r\u00e9seaux \u00e0 larges bandes PMR\u00a0\u00bb. Cette th\u00e8se a \u00e9t\u00e9 r\u00e9alis\u00e9e sous la direction de Pr. Djamal ZEGHLACHE et encadr\u00e9e acad\u00e9miquement […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ocean_post_layout":"","ocean_both_sidebars_style":"","ocean_both_sidebars_content_width":0,"ocean_both_sidebars_sidebars_width":0,"ocean_sidebar":"","ocean_second_sidebar":"","ocean_disable_margins":"enable","ocean_add_body_class":"","ocean_shortcode_before_top_bar":"","ocean_shortcode_after_top_bar":"","ocean_shortcode_before_header":"","ocean_shortcode_after_header":"","ocean_has_shortcode":"","ocean_shortcode_after_title":"","ocean_shortcode_before_footer_widgets":"","ocean_shortcode_after_footer_widgets":"","ocean_shortcode_before_footer_bottom":"","ocean_shortcode_after_footer_bottom":"","ocean_display_top_bar":"default","ocean_display_header":"default","ocean_header_style":"","ocean_center_header_left_menu":"","ocean_custom_header_template":"","ocean_custom_logo":0,"ocean_custom_retina_logo":0,"ocean_custom_logo_max_width":0,"ocean_custom_logo_tablet_max_width":0,"ocean_custom_logo_mobile_max_width":0,"ocean_custom_logo_max_height":0,"ocean_custom_logo_tablet_max_height":0,"ocean_custom_logo_mobile_max_height":0,"ocean_header_custom_menu":"","ocean_menu_typo_font_family":"","ocean_menu_typo_font_subset":"","ocean_menu_typo_font_size":0,"ocean_menu_typo_font_size_tablet":0,"ocean_menu_typo_font_size_mobile":0,"ocean_menu_typo_font_size_unit":"px","ocean_menu_typo_font_weight":"","ocean_menu_typo_font_weight_tablet":"","ocean_menu_typo_font_weight_mobile":"","ocean_menu_typo_transform":"","ocean_menu_typo_transform_tablet":"","ocean_menu_typo_transform_mobile":"","ocean_menu_typo_line_height":0,"ocean_menu_typo_line_height_tablet":0,"ocean_menu_typo_line_height_mobile":0,"ocean_menu_typo_line_height_unit":"","ocean_menu_typo_spacing":0,"ocean_menu_typo_spacing_tablet":0,"ocean_menu_typo_spacing_mobile":0,"ocean_menu_typo_spacing_unit":"","ocean_menu_link_color":"","ocean_menu_link_color_hover":"","ocean_menu_link_color_active":"","ocean_menu_link_background":"","ocean_menu_link_hover_background":"","ocean_menu_link_active_background":"","ocean_menu_social_links_bg":"","ocean_menu_social_hover_links_bg":"","ocean_menu_social_links_color":"","ocean_menu_social_hover_links_color":"","ocean_disable_title":"default","ocean_disable_heading":"default","ocean_post_title":"","ocean_post_subheading":"","ocean_post_title_style":"","ocean_post_title_background_color":"","ocean_post_title_background":0,"ocean_post_title_bg_image_position":"","ocean_post_title_bg_image_attachment":"","ocean_post_title_bg_image_repeat":"","ocean_post_title_bg_image_size":"","ocean_post_title_height":0,"ocean_post_title_bg_overlay":0.5,"ocean_post_title_bg_overlay_color":"","ocean_disable_breadcrumbs":"default","ocean_breadcrumbs_color":"","ocean_breadcrumbs_separator_color":"","ocean_breadcrumbs_links_color":"","ocean_breadcrumbs_links_hover_color":"","ocean_display_footer_widgets":"default","ocean_display_footer_bottom":"default","ocean_custom_footer_template":"","ocean_post_oembed":"","ocean_post_self_hosted_media":"","ocean_post_video_embed":"","ocean_link_format":"","ocean_link_format_target":"self","ocean_quote_format":"","ocean_quote_format_link":"post","ocean_gallery_link_images":"on","ocean_gallery_id":[],"footnotes":""},"categories":[400],"tags":[],"class_list":["post-398","post","type-post","status-publish","format-standard","hentry","category-theses-2013-fr","entry"],"_links":{"self":[{"href":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/wp-json\/wp\/v2\/posts\/398","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/wp-json\/wp\/v2\/comments?post=398"}],"version-history":[{"count":1,"href":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/wp-json\/wp\/v2\/posts\/398\/revisions"}],"predecessor-version":[{"id":1868,"href":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/wp-json\/wp\/v2\/posts\/398\/revisions\/1868"}],"wp:attachment":[{"href":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/wp-json\/wp\/v2\/media?parent=398"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/wp-json\/wp\/v2\/categories?post=398"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/wp-json\/wp\/v2\/tags?post=398"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\nle lundi 25 F\u00e9vrier 2013<\/strong>, \u00e0 14h<\/strong>00
\nSalle Debussy \u00e0 Cassidian<\/strong>, 1, Bd Jean Moulin, ZAC de la Clef St-Pierre, 78996 Elancourt<\/strong> Cedex.<\/p>\n
\n Pr. Xavier LAGRANGE, Professeur \u00e0 TELECOM Bretagne .
\n
\n– Examinateurs :<\/strong><\/p>\n
\n Dr. Hang Nguyen, Directeur d’Etudes \u00e0 Telecom SudParis,
\n M. Laurent MARTINOD, Ing\u00e9nieur \u00e0 Cassidian,
\n M. Philippe MEGE, Expert Senior \u00e0 Cassidian,
\n Pr. Pierre SENS, Professeur \u00e0 l’Universit\u00e9 de Paris 6 \u00ab\u00a0Pierre et Marie Curie\u00a0\u00bb . <\/p>\n
\nLe turbo d\u00e9codage est modifi\u00e9 pour exploiter de fa\u00e7on optimale l’insertion progressive de donn\u00e9es dans le processus d’encodage et estimer hierarchiquement ces donn\u00e9es. Les propri\u00e9t\u00e9s des structures parall\u00e8les et s\u00e9ries sont analys\u00e9es \u00e0 l’aide d’une analogie aux codes pilotes, ainsi qu’en regardant de plus pr\u00e8s leurs caract\u00e9ristiques de poids de codage. Le taux de transmission virtuel et les repr\u00e9sentations des graphs factor fournissent une meilleure compr\u00e9hension de ces propri\u00e9t\u00e9s. Les gains de codage sont \u00e9valu\u00e9s \u00e0 l’aide de simulations num\u00e9riques, en supposant des canaux de transmission radio statiques et dynamiques, et en utilisant des codes de r\u00e9f\u00e9rence. <\/p>\n
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