{"id":"https://openalex.org/W1972279328","doi":"https://doi.org/10.1109/mwc.2003.1182106","title":"IMT-2000 core network node systems","display_name":"IMT-2000 core network node systems","publication_year":2003,"publication_date":"2003-02-01","ids":{"openalex":"https://openalex.org/W1972279328","doi":"https://doi.org/10.1109/mwc.2003.1182106","mag":"1972279328"},"language":"en","primary_location":{"id":"doi:10.1109/mwc.2003.1182106","is_oa":false,"landing_page_url":"https://doi.org/10.1109/mwc.2003.1182106","pdf_url":null,"source":{"id":"https://openalex.org/S146764194","display_name":"IEEE Wireless Communications","issn_l":"1536-1284","issn":["1536-1284","1558-0687"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310319808","host_organization_name":"Institute of Electrical and Electronics Engineers","host_organization_lineage":["https://openalex.org/P4310319808"],"host_organization_lineage_names":["Institute of Electrical and Electronics Engineers"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"IEEE Wireless Communications","raw_type":"journal-article"},"type":"article","indexed_in":["crossref"],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5007747442","display_name":"T. Tamura","orcid":null},"institutions":[{"id":"https://openalex.org/I118347220","display_name":"NEC (Japan)","ror":"https://ror.org/04jndar25","country_code":"JP","type":"company","lineage":["https://openalex.org/I118347220"]}],"countries":["JP"],"is_corresponding":false,"raw_author_name":"T. Tamura","raw_affiliation_strings":["NEC Communication Systems Limited, Japan"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"NEC Communication Systems Limited, Japan","institution_ids":["https://openalex.org/I118347220"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5026581043","display_name":"Tomohiro Takahashi","orcid":"https://orcid.org/0000-0003-1325-0693"},"institutions":[{"id":"https://openalex.org/I118347220","display_name":"NEC (Japan)","ror":"https://ror.org/04jndar25","country_code":"JP","type":"company","lineage":["https://openalex.org/I118347220"]}],"countries":["JP"],"is_corresponding":false,"raw_author_name":"T. Takahashi","raw_affiliation_strings":["NEC Communication Systems Limited, Japan"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"NEC Communication Systems Limited, Japan","institution_ids":["https://openalex.org/I118347220"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5041010343","display_name":"Tatsuya Morita","orcid":"https://orcid.org/0000-0002-7257-7429"},"institutions":[{"id":"https://openalex.org/I118347220","display_name":"NEC (Japan)","ror":"https://ror.org/04jndar25","country_code":"JP","type":"company","lineage":["https://openalex.org/I118347220"]}],"countries":["JP"],"is_corresponding":false,"raw_author_name":"T. Morita","raw_affiliation_strings":["NEC Corporation Limited, Japan"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"NEC Corporation Limited, Japan","institution_ids":["https://openalex.org/I118347220"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5060465866","display_name":"K. Ohtaki","orcid":null},"institutions":[{"id":"https://openalex.org/I118347220","display_name":"NEC (Japan)","ror":"https://ror.org/04jndar25","country_code":"JP","type":"company","lineage":["https://openalex.org/I118347220"]}],"countries":["JP"],"is_corresponding":false,"raw_author_name":"K. Ohtaki","raw_affiliation_strings":["NEC Corporation Limited, Japan"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"NEC Corporation Limited, Japan","institution_ids":["https://openalex.org/I118347220"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5069682893","display_name":"H. Takeda","orcid":null},"institutions":[{"id":"https://openalex.org/I118347220","display_name":"NEC (Japan)","ror":"https://ror.org/04jndar25","country_code":"JP","type":"company","lineage":["https://openalex.org/I118347220"]}],"countries":["JP"],"is_corresponding":false,"raw_author_name":"H. Takeda","raw_affiliation_strings":["NEC Corporation Limited, Japan"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"NEC Corporation Limited, Japan","institution_ids":["https://openalex.org/I118347220"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":5,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":0.7454,"has_fulltext":false,"cited_by_count":4,"citation_normalized_percentile":{"value":0.77432093,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":null,"biblio":{"volume":"10","issue":"1","first_page":"15","last_page":"21"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10575","display_name":"Wireless Communication Networks Research","score":0.9887999892234802,"subfield":{"id":"https://openalex.org/subfields/1705","display_name":"Computer Networks and Communications"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T10575","display_name":"Wireless Communication Networks Research","score":0.9887999892234802,"subfield":{"id":"https://openalex.org/subfields/1705","display_name":"Computer Networks and Communications"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10651","display_name":"IPv6, Mobility, Handover, Networks, Security","score":0.9420999884605408,"subfield":{"id":"https://openalex.org/subfields/2208","display_name":"Electrical and Electronic Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T12203","display_name":"Mobile Agent-Based Network Management","score":0.9168000221252441,"subfield":{"id":"https://openalex.org/subfields/1705","display_name":"Computer Networks and Communications"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.825677752494812},{"id":"https://openalex.org/keywords/core-network","display_name":"Core network","score":0.7247481346130371},{"id":"https://openalex.org/keywords/computer-network","display_name":"Computer network","score":0.6438685059547424},{"id":"https://openalex.org/keywords/node","display_name":"Node (physics)","score":0.545619547367096},{"id":"https://openalex.org/keywords/core","display_name":"Core (optical fiber)","score":0.513815701007843},{"id":"https://openalex.org/keywords/network-architecture","display_name":"Network architecture","score":0.48726215958595276},{"id":"https://openalex.org/keywords/architecture","display_name":"Architecture","score":0.481444776058197},{"id":"https://openalex.org/keywords/phone","display_name":"Phone","score":0.47287318110466003},{"id":"https://openalex.org/keywords/telecommunications","display_name":"Telecommunications","score":0.47032463550567627}],"concepts":[{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.825677752494812},{"id":"https://openalex.org/C5038329","wikidata":"https://www.wikidata.org/wiki/Q1142907","display_name":"Core network","level":2,"score":0.7247481346130371},{"id":"https://openalex.org/C31258907","wikidata":"https://www.wikidata.org/wiki/Q1301371","display_name":"Computer network","level":1,"score":0.6438685059547424},{"id":"https://openalex.org/C62611344","wikidata":"https://www.wikidata.org/wiki/Q1062658","display_name":"Node (physics)","level":2,"score":0.545619547367096},{"id":"https://openalex.org/C2164484","wikidata":"https://www.wikidata.org/wiki/Q5170150","display_name":"Core (optical fiber)","level":2,"score":0.513815701007843},{"id":"https://openalex.org/C193415008","wikidata":"https://www.wikidata.org/wiki/Q639681","display_name":"Network architecture","level":2,"score":0.48726215958595276},{"id":"https://openalex.org/C123657996","wikidata":"https://www.wikidata.org/wiki/Q12271","display_name":"Architecture","level":2,"score":0.481444776058197},{"id":"https://openalex.org/C2778707766","wikidata":"https://www.wikidata.org/wiki/Q202064","display_name":"Phone","level":2,"score":0.47287318110466003},{"id":"https://openalex.org/C76155785","wikidata":"https://www.wikidata.org/wiki/Q418","display_name":"Telecommunications","level":1,"score":0.47032463550567627},{"id":"https://openalex.org/C127413603","wikidata":"https://www.wikidata.org/wiki/Q11023","display_name":"Engineering","level":0,"score":0.0},{"id":"https://openalex.org/C142362112","wikidata":"https://www.wikidata.org/wiki/Q735","display_name":"Art","level":0,"score":0.0},{"id":"https://openalex.org/C153349607","wikidata":"https://www.wikidata.org/wiki/Q36649","display_name":"Visual arts","level":1,"score":0.0},{"id":"https://openalex.org/C138885662","wikidata":"https://www.wikidata.org/wiki/Q5891","display_name":"Philosophy","level":0,"score":0.0},{"id":"https://openalex.org/C41895202","wikidata":"https://www.wikidata.org/wiki/Q8162","display_name":"Linguistics","level":1,"score":0.0},{"id":"https://openalex.org/C66938386","wikidata":"https://www.wikidata.org/wiki/Q633538","display_name":"Structural engineering","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/mwc.2003.1182106","is_oa":false,"landing_page_url":"https://doi.org/10.1109/mwc.2003.1182106","pdf_url":null,"source":{"id":"https://openalex.org/S146764194","display_name":"IEEE Wireless Communications","issn_l":"1536-1284","issn":["1536-1284","1558-0687"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310319808","host_organization_name":"Institute of Electrical and Electronics Engineers","host_organization_lineage":["https://openalex.org/P4310319808"],"host_organization_lineage_names":["Institute of Electrical and Electronics Engineers"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"IEEE Wireless Communications","raw_type":"journal-article"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":0,"referenced_works":[],"related_works":["https://openalex.org/W2393335510","https://openalex.org/W2592147384","https://openalex.org/W4283258522","https://openalex.org/W2092227239","https://openalex.org/W2350436703","https://openalex.org/W1970095541","https://openalex.org/W2545661216","https://openalex.org/W2798651183","https://openalex.org/W2544365975","https://openalex.org/W2514475699"],"abstract_inverted_index":{"The":[0],"IMT-2000":[1],"third-generation":[2],"network":[3,40],"system":[4,47],"has":[5,31],"been":[6,32],"operating":[7],"in":[8],"the":[9],"Japanese":[10],"market":[11],"since":[12],"May":[13],"2001.":[14],"In":[15],"order":[16],"to":[17,44],"provide":[18],"value":[19],"added":[20],"phone":[21],"services":[22],"including":[23],"CAMEL":[24],"services,":[25],"a":[26],"layered":[27],"call":[28],"control":[29],"architecture":[30,35],"developed.":[33],"This":[34,46],"could":[36],"achieve":[37],"smooth":[38],"core":[39],"migration":[41],"from":[42],"2G":[43],"3G.":[45],"provides":[48],"MSC/VLR,":[49],"SGSN,":[50],"and":[51],"GGSN":[52],"functionalities":[53],"based":[54],"on":[55],"ATM":[56],"technology.":[57]},"counts_by_year":[],"updated_date":"2026-06-11T09:08:48.828518","created_date":"2025-10-10T00:00:00"}