{"created":"2024-11-07T00:52:39.126081+00:00","id":2000278,"links":{},"metadata":{"_buckets":{"deposit":"e26f4f3c-4a93-4dad-bab5-8ded664a334a"},"_deposit":{"created_by":16,"id":"2000278","owner":"16","owners":[16],"pid":{"revision_id":0,"type":"depid","value":"2000278"},"status":"published"},"_oai":{"id":"oai:muroran-it.repo.nii.ac.jp:02000278","sets":["41:227"]},"author_link":[],"control_number":"2000278","item_1723181058213":{"attribute_name":"日付","attribute_value_mlt":[{"subitem_date_issued_datetime":"2024-09-24","subitem_date_issued_type":"Issued"}]},"item_1730941712127":{"attribute_name":"開始ページ","attribute_value_mlt":[{"subitem_start_page":"1"}]},"item_81_date_granted_17":{"attribute_name":"学位授与年月日","attribute_value_mlt":[{"subitem_dategranted":"2024-09-24"}]},"item_81_degree_grantor_10":{"attribute_name":"学位授与機関","attribute_value_mlt":[{"subitem_degreegrantor":[{"subitem_degreegrantor_language":"ja","subitem_degreegrantor_name":"室蘭工業大学"},{"subitem_degreegrantor_language":"en","subitem_degreegrantor_name":"Muroran Institute of Technology"}],"subitem_degreegrantor_identifier":[{"subitem_degreegrantor_identifier_name":"10103","subitem_degreegrantor_identifier_scheme":"kakenhi"}]}]},"item_81_degree_name_11":{"attribute_name":"学位名","attribute_value_mlt":[{"subitem_degreename":"博士（工学）","subitem_degreename_language":"ja"}]},"item_81_description_7":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"Reconfigurable intelligent surfaces (RISs) have emerged as a promising technology for future wireless communication systems due to their passive meta-elements, slim design, high integration, cost-effectiveness, and ease of deployment. However, optimizing beamforming at RISs, transmission power at access points (APs), deployment locations of multiple RISs, and association relationships between RISs and IoT devices are crucial for various RIS assisted wireless communication networks. Therefore, this dissertation presents effective solutions to maximize the achievable rates, enhance the coverage probability, minimize power consumption, and optimize the quality of experience (QoE).\n In this dissertation, four major tasks are proposed on the various multi-RIS-assisted wireless communication scenarios. The first task investigates the influence of multiple RIS on the average achievable rate in indoor communication wireless networks. The second task focuses on exploring the relationships between coverage probability and deployment locations of multiple RIS in outdoor scenarios to maximize coverage while satisfying the network cost constraint. Moreover, the second task introduces a method based on approximate cell decomposition to calculate coverage probability quantitatively. The third task is to optimize power consumption, which consists of exploring the association relationships and minimizing the overall power consumption. Finally, the last task investigates the RIS deployed in the\n wireless VR THz communication systems to maximize the QoE by jointly optimizing the beamforming vectors at multiple RISs, the transmit power of AP, and the rendering capacity allocation among VR users. To solve the issue, the issue is decomposed into two stages: stage-1 aims to minimize BER and maximize the data rate, while stage-2 aims to maximize rendering capacity among virtual objects.","subitem_description_language":"en","subitem_description_type":"Abstract"}]},"item_81_dissertation_number_13":{"attribute_name":"学位授与番号","attribute_value_mlt":[{"subitem_dissertationnumber":"甲第539号"}]},"item_81_identifier_registration":{"attribute_name":"ID登録","attribute_value_mlt":[{"subitem_identifier_reg_text":"10.15118/0002000278","subitem_identifier_reg_type":"JaLC"}]},"item_81_text_12":{"attribute_name":"学位の種別","attribute_value_mlt":[{"subitem_text_language":"ja","subitem_text_value":"課程博士"}]},"item_81_text_14":{"attribute_name":"報告番号","attribute_value_mlt":[{"subitem_text_language":"ja","subitem_text_value":"甲第539号"}]},"item_81_text_15":{"attribute_name":"学位記番号","attribute_value_mlt":[{"subitem_text_language":"ja","subitem_text_value":"博甲第539号"}]},"item_81_text_16":{"attribute_name":"研究科・専攻","attribute_value_mlt":[{"subitem_text_language":"ja","subitem_text_value":"工学専攻"}]},"item_81_version_type_24":{"attribute_name":"著者版フラグ","attribute_value_mlt":[{"subitem_version_resource":"http://purl.org/coar/version/c_970fb48d4fbd8a85","subitem_version_type":"VoR"}]},"item_access_right":{"attribute_name":"アクセス権","attribute_value_mlt":[{"subitem_access_right":"open access","subitem_access_right_uri":"http://purl.org/coar/access_right/c_abf2"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Yu, Yin Ma","creatorNameLang":"en"}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_access","date":[{"dateType":"Available","dateValue":"2024-11-07"}],"filename":"A539_summary.pdf","filesize":[{"value":"303 KB"}],"format":"application/pdf","mimetype":"application/pdf","url":{"objectType":"abstract","url":"https://muroran-it.repo.nii.ac.jp/record/2000278/files/A539_summary.pdf"},"version_id":"07362595-02ea-44bc-aa0a-5c08bb181d1f"},{"accessrole":"open_access","date":[{"dateType":"Available","dateValue":"2024-11-07"}],"filename":"A539.pdf","filesize":[{"value":"5.9 MB"}],"format":"application/pdf","mimetype":"application/pdf","url":{"objectType":"fulltext","url":"https://muroran-it.repo.nii.ac.jp/record/2000278/files/A539.pdf"},"version_id":"2367df75-a33c-45a2-8cf8-a049f5ded667"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"eng"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"doctoral thesis","resourceuri":"http://purl.org/coar/resource_type/c_db06"}]},"item_title":"Towards User-centric Wireless Systems: Optimizing Reconfigurable Intelligent Surfaces for Customization and Sustainability","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Towards User-centric Wireless Systems: Optimizing Reconfigurable Intelligent Surfaces for Customization and Sustainability","subitem_title_language":"en"},{"subitem_title":"ユーザ中心の無線システムに向けて：カスタマイズと持続可能性のための再構成可能なインテリジェント表面の最適化","subitem_title_language":"ja"}]},"item_type_id":"81","owner":"16","path":["227"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2024-11-07"},"publish_date":"2024-11-07","publish_status":"0","recid":"2000278","relation_version_is_last":true,"title":["Towards User-centric Wireless Systems: Optimizing Reconfigurable Intelligent Surfaces for Customization and Sustainability"],"weko_creator_id":"16","weko_shared_id":-1},"updated":"2024-11-10T23:47:26.530951+00:00"}