{"_buckets": {"deposit": "447bf79c-e49f-470b-9d10-aeb15afc156e"}, "_deposit": {"id": "1780", "owners": [], "pid": {"revision_id": 0, "type": "depid", "value": "1780"}, "status": "published"}, "_oai": {"id": "oai:niigata-u.repo.nii.ac.jp:00001780", "sets": ["454", "425"]}, "item_5_biblio_info_6": {"attribute_name": "書誌情報", "attribute_value_mlt": [{"bibliographicIssueDates": {"bibliographicIssueDate": "2011-05", "bibliographicIssueDateType": "Issued"}, "bibliographicIssueNumber": "5", "bibliographicPageEnd": "1253", "bibliographicPageStart": "1243", "bibliographicVolumeNumber": "E94-B", "bibliographic_titles": [{"bibliographic_title": "IEICE transactions on communications"}, {"bibliographic_title": "IEICE transactions on communications", "bibliographic_titleLang": "en"}]}]}, "item_5_description_4": {"attribute_name": "抄録", "attribute_value_mlt": [{"subitem_description": "This paper discusses the possibility of deploying a short-range cognitive radio (secondary communication system) within the service area of a primary system. Although the secondary system interferes with the primary system, there are certain locations in the service area of the primary system where the cognitive radio can reuse the frequency of the primary system without causing harmful interference to it and being disturbed by the primary system. These locations are referred to as having a spatial opportunity for communications in the secondary system, since it can reuse the frequency of the primary system. Simulation results indicate that the antenna gain, beamwidth, and propagation path loss greatly affect the spatial opportunity of frequency reuse for the secondary users. The results show that spatial spectrum reuse can be significantly increased when the primary system users are equipped with directional antennas. An important component in this study is the heterogeneous path loss model, i.e., the path loss model within the primary system is different from the model used to calculate the interference between the primary and the secondary systems. Our results show that the propagation models corresponding to the actual antenna heights in the primary/secondary system can largely impact the possibilities for spectrum reuse by the cognitive radios.", "subitem_description_type": "Abstract"}]}, "item_5_publisher_7": {"attribute_name": "出版者", "attribute_value_mlt": [{"subitem_publisher": "The Institute of Electronics, Information and Communication Engineers"}]}, "item_5_relation_14": {"attribute_name": "DOI", "attribute_value_mlt": [{"subitem_relation_type_id": {"subitem_relation_type_id_text": "info:doi/10.1587/transcom.E94.B.1243", "subitem_relation_type_select": "DOI"}}]}, "item_5_relation_31": {"attribute_name": "異版である", "attribute_value_mlt": [{"subitem_relation_type": "isVersionOf", "subitem_relation_type_id": {"subitem_relation_type_id_text": "http://www.ieice.org/jpn/trans_online/", "subitem_relation_type_select": "URI"}}]}, "item_5_rights_15": {"attribute_name": "権利", "attribute_value_mlt": [{"subitem_rights": "Copyright(C)2011 IEICE"}, {"subitem_rights": "本文データは学協会の許諾に基づきEJサイトから複製したものである"}]}, "item_5_select_19": {"attribute_name": "著者版フラグ", "attribute_value_mlt": [{"subitem_select_item": "publisher"}]}, "item_5_source_id_11": {"attribute_name": "書誌レコードID", "attribute_value_mlt": [{"subitem_source_identifier": "AA10826261", "subitem_source_identifier_type": "NCID"}]}, "item_5_source_id_9": {"attribute_name": "ISSN", "attribute_value_mlt": [{"subitem_source_identifier": "09168516", "subitem_source_identifier_type": "ISSN"}]}, "item_creator": {"attribute_name": "著者", "attribute_type": "creator", "attribute_value_mlt": [{"creatorNames": [{"creatorName": "Nishimori, Kentaro"}], "nameIdentifiers": [{"nameIdentifier": "5549", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "Di, Taranto  Rocco"}], "nameIdentifiers": [{"nameIdentifier": "5550", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "Yomo, Hiroyuki"}], "nameIdentifiers": [{"nameIdentifier": "5551", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "Popovski, Petar"}], "nameIdentifiers": [{"nameIdentifier": "5552", "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": "2019-07-29"}], "displaytype": "detail", "download_preview_message": "", "file_order": 0, "filename": "E94-B_5_1243-1253.pdf", "filesize": [{"value": "2.0 MB"}], "format": "application/pdf", "future_date_message": "", "is_thumbnail": false, "licensetype": "license_free", "mimetype": "application/pdf", "size": 2000000.0, "url": {"label": "E94-B_5_1243-1253.pdf", "url": "https://niigata-u.repo.nii.ac.jp/record/1780/files/E94-B_5_1243-1253.pdf"}, "version_id": "db333144-fcb3-433c-bae1-980f805132c5"}]}, "item_keyword": {"attribute_name": "キーワード", "attribute_value_mlt": [{"subitem_subject": "cognitive radio", "subitem_subject_scheme": "Other"}, {"subitem_subject": "spatial opportunity", "subitem_subject_scheme": "Other"}, {"subitem_subject": "directional antenna", "subitem_subject_scheme": "Other"}, {"subitem_subject": "heterogeneous propagation path", "subitem_subject_scheme": "Other"}, {"subitem_subject": "loss conditions target CIR", "subitem_subject_scheme": "Other"}, {"subitem_subject": "antenna height", "subitem_subject_scheme": "Other"}]}, "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": "journal article", "resourceuri": "http://purl.org/coar/resource_type/c_6501"}]}, "item_title": "Cognitive Radio Operation under Directional Primary Interference and Practical Path Loss Models", "item_titles": {"attribute_name": "タイトル", "attribute_value_mlt": [{"subitem_title": "Cognitive Radio Operation under Directional Primary Interference and Practical Path Loss Models"}, {"subitem_title": "Cognitive Radio Operation under Directional Primary Interference and Practical Path Loss Models", "subitem_title_language": "en"}]}, "item_type_id": "5", "owner": "1", "path": ["454", "425"], "permalink_uri": "http://hdl.handle.net/10191/30678", "pubdate": {"attribute_name": "公開日", "attribute_value": "2014-12-02"}, "publish_date": "2014-12-02", "publish_status": "0", "recid": "1780", "relation": {}, "relation_version_is_last": true, "title": ["Cognitive Radio Operation under Directional Primary Interference and Practical Path Loss Models"], "weko_shared_id": null}