{"created":"2021-03-01T06:18:12.793722+00:00","id":1632,"links":{},"metadata":{"_buckets":{"deposit":"fb1f467f-2452-4710-bb88-9c014b8da224"},"_deposit":{"id":"1632","owners":[],"pid":{"revision_id":0,"type":"depid","value":"1632"},"status":"published"},"_oai":{"id":"oai:repository.dl.itc.u-tokyo.ac.jp:00001632","sets":["34:105:262","9:233:234"]},"item_7_alternative_title_1":{"attribute_name":"その他のタイトル","attribute_value_mlt":[{"subitem_alternative_title":"東京都心における周波数利用率の測定と統計的解析"}]},"item_7_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2011-03-24","bibliographicIssueDateType":"Issued"},"bibliographic_titles":[{}]}]},"item_7_date_granted_25":{"attribute_name":"学位授与年月日","attribute_value_mlt":[{"subitem_dategranted":"2011-03-24"}]},"item_7_degree_name_20":{"attribute_name":"学位名","attribute_value_mlt":[{"subitem_degreename":"修士(情報理工学)"}]},"item_7_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"The 3rd generation technology of mobile devices (3G) is supported by the wireless industry as a state of the art technology. It brings high-speed Internet and data transmissions to cell phones and increases the communication capacity for cell-phone applications. But a bottleneck exists there because of a shortage of available electromagnetic spectrum, what we call RF, to let next generation mobile systems roll out in the future. This work seeks to identify the keys in spectrum utilization and the means, by which more spectra can be available, and also how an effective dynamic utilization measurement and analysis can be conducted for the future mobile communication systems to improve the spectrum allocation and assignment activities and to enhance the heterogeneous network switching usage. In this master thesis, after introducing spectrum allocation and spectrum usage recent years, we will take a look at white space and other works related to spectrum management. Then, to our work, we will introduce the measurement we have deployed to measure the spectrum in downtown Tokyo, Japan for two years which collect a large amount of data by a long range of frequency. The second phase is the visualization phase of spectrum occupancy in which we show spectrum occupancy using our spectrum map system. And finally in the analysis phase, we show our quantitative analysis model to find an exact duty cycle of spectrum utilization, to know how spectrum is currently utilized in Tokyo and the spatiotemporal characteristic of spectrum as well as comparison with spectrum utilization in other countries.","subitem_description_type":"Abstract"}]},"item_7_full_name_3":{"attribute_name":"著者別名","attribute_value_mlt":[{"nameIdentifiers":[{"nameIdentifier":"5279","nameIdentifierScheme":"WEKO"}],"names":[{"name":"チャン, クワン  チュン"}]}]},"item_7_select_21":{"attribute_name":"学位","attribute_value_mlt":[{"subitem_select_item":"master"}]},"item_7_subject_13":{"attribute_name":"日本十進分類法","attribute_value_mlt":[{"subitem_subject":"547","subitem_subject_scheme":"NDC"}]},"item_7_text_24":{"attribute_name":"研究科・専攻","attribute_value_mlt":[{"subitem_text_value":"情報理工学系研究科電子情報学専攻"}]},"item_7_text_4":{"attribute_name":"著者所属","attribute_value_mlt":[{"subitem_text_value":"東京大学大学院情報理工学系研究科電子情報学専攻"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Tran, Quang  Trung"}],"nameIdentifiers":[{"nameIdentifier":"5278","nameIdentifierScheme":"WEKO"}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2017-05-31"}],"displaytype":"detail","filename":"48096440.pdf","filesize":[{"value":"7.3 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"48096440.pdf","url":"https://repository.dl.itc.u-tokyo.ac.jp/record/1632/files/48096440.pdf"},"version_id":"a03dbf5c-4db8-4498-8884-ce732fba2f0d"}]},"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":"thesis","resourceuri":"http://purl.org/coar/resource_type/c_46ec"}]},"item_title":"Measurement and Statistical Analysis of Frequency Utilization in Tokyo","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Measurement and Statistical Analysis of Frequency Utilization in Tokyo"}]},"item_type_id":"7","owner":"1","path":["234","262"],"pubdate":{"attribute_name":"公開日","attribute_value":"2011-08-08"},"publish_date":"2011-08-08","publish_status":"0","recid":"1632","relation_version_is_last":true,"title":["Measurement and Statistical Analysis of Frequency Utilization in Tokyo"],"weko_creator_id":"1","weko_shared_id":null},"updated":"2022-12-19T03:43:00.551963+00:00"}