{"id":"https://openalex.org/W7148532494","doi":"https://doi.org/10.1109/tnse.2026.3679928","title":"Utility-Enhanced Spatio-Temporal Trajectory Synthesis With Differential Privacy","display_name":"Utility-Enhanced Spatio-Temporal Trajectory Synthesis With Differential Privacy","publication_year":2026,"publication_date":"2026-01-01","ids":{"openalex":"https://openalex.org/W7148532494","doi":"https://doi.org/10.1109/tnse.2026.3679928"},"language":null,"primary_location":{"id":"doi:10.1109/tnse.2026.3679928","is_oa":false,"landing_page_url":"https://doi.org/10.1109/tnse.2026.3679928","pdf_url":null,"source":{"id":"https://openalex.org/S2484352698","display_name":"IEEE Transactions on Network Science and Engineering","issn_l":"2327-4697","issn":["2327-4697","2334-329X"],"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 Transactions on Network Science and Engineering","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/A5132765786","display_name":"Bin Cai","orcid":null},"institutions":[{"id":"https://openalex.org/I158842170","display_name":"Chongqing University","ror":"https://ror.org/023rhb549","country_code":"CN","type":"education","lineage":["https://openalex.org/I158842170"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Bin Cai","raw_affiliation_strings":["Key Laboratory of Dependable Service Computing in Cyber Physical Society (Chongqing University), Ministry of Education, Chongqing, China"],"raw_orcid":"https://orcid.org/0000-0003-2808-0156","affiliations":[{"raw_affiliation_string":"Key Laboratory of Dependable Service Computing in Cyber Physical Society (Chongqing University), Ministry of Education, Chongqing, China","institution_ids":["https://openalex.org/I158842170"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5132827651","display_name":"Jiaji Zhang","orcid":null},"institutions":[{"id":"https://openalex.org/I158842170","display_name":"Chongqing University","ror":"https://ror.org/023rhb549","country_code":"CN","type":"education","lineage":["https://openalex.org/I158842170"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Jiaji Zhang","raw_affiliation_strings":["Key Laboratory of Dependable Service Computing in Cyber Physical Society (Chongqing University), Ministry of Education, Chongqing, China"],"raw_orcid":"https://orcid.org/0009-0006-3911-7742","affiliations":[{"raw_affiliation_string":"Key Laboratory of Dependable Service Computing in Cyber Physical Society (Chongqing University), Ministry of Education, Chongqing, China","institution_ids":["https://openalex.org/I158842170"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5007325803","display_name":"Jiajun Chen","orcid":"https://orcid.org/0000-0001-8129-4538"},"institutions":[{"id":"https://openalex.org/I158842170","display_name":"Chongqing University","ror":"https://ror.org/023rhb549","country_code":"CN","type":"education","lineage":["https://openalex.org/I158842170"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Jiajun Chen","raw_affiliation_strings":["Key Laboratory of Dependable Service Computing in Cyber Physical Society (Chongqing University), Ministry of Education, Chongqing, China"],"raw_orcid":"https://orcid.org/0000-0001-8129-4538","affiliations":[{"raw_affiliation_string":"Key Laboratory of Dependable Service Computing in Cyber Physical Society (Chongqing University), Ministry of Education, Chongqing, China","institution_ids":["https://openalex.org/I158842170"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5132760956","display_name":"Chunqiang Hu","orcid":null},"institutions":[{"id":"https://openalex.org/I158842170","display_name":"Chongqing University","ror":"https://ror.org/023rhb549","country_code":"CN","type":"education","lineage":["https://openalex.org/I158842170"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Chunqiang Hu","raw_affiliation_strings":["Key Laboratory of Dependable Service Computing in Cyber Physical Society (Chongqing University), Ministry of Education, Chongqing, China"],"raw_orcid":"https://orcid.org/0000-0001-5825-2241","affiliations":[{"raw_affiliation_string":"Key Laboratory of Dependable Service Computing in Cyber Physical Society (Chongqing University), Ministry of Education, Chongqing, China","institution_ids":["https://openalex.org/I158842170"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":[],"corresponding_institution_ids":["https://openalex.org/I158842170"],"apc_list":null,"apc_paid":null,"fwci":0.0,"has_fulltext":false,"cited_by_count":0,"citation_normalized_percentile":{"value":0.34479578,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":null,"biblio":{"volume":"13","issue":null,"first_page":"8277","last_page":"8294"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11106","display_name":"Data Management and Algorithms","score":0.2150000035762787,"subfield":{"id":"https://openalex.org/subfields/1711","display_name":"Signal Processing"},"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/T11106","display_name":"Data Management and Algorithms","score":0.2150000035762787,"subfield":{"id":"https://openalex.org/subfields/1711","display_name":"Signal Processing"},"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/T10764","display_name":"Privacy-Preserving Technologies in Data","score":0.16259999573230743,"subfield":{"id":"https://openalex.org/subfields/1702","display_name":"Artificial Intelligence"},"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/T11596","display_name":"Constraint Satisfaction and Optimization","score":0.09749999642372131,"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/trajectory","display_name":"Trajectory","score":0.5720999836921692},{"id":"https://openalex.org/keywords/differential-privacy","display_name":"Differential privacy","score":0.5182999968528748},{"id":"https://openalex.org/keywords/control-theory","display_name":"Control theory (sociology)","score":0.3109999895095825},{"id":"https://openalex.org/keywords/information-privacy","display_name":"Information privacy","score":0.29330000281333923},{"id":"https://openalex.org/keywords/noise","display_name":"Noise (video)","score":0.2824999988079071},{"id":"https://openalex.org/keywords/differential","display_name":"Differential (mechanical device)","score":0.2759999930858612}],"concepts":[{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.642799973487854},{"id":"https://openalex.org/C13662910","wikidata":"https://www.wikidata.org/wiki/Q193139","display_name":"Trajectory","level":2,"score":0.5720999836921692},{"id":"https://openalex.org/C23130292","wikidata":"https://www.wikidata.org/wiki/Q5275358","display_name":"Differential privacy","level":2,"score":0.5182999968528748},{"id":"https://openalex.org/C47446073","wikidata":"https://www.wikidata.org/wiki/Q5165890","display_name":"Control theory (sociology)","level":3,"score":0.3109999895095825},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.3093999922275543},{"id":"https://openalex.org/C123201435","wikidata":"https://www.wikidata.org/wiki/Q456632","display_name":"Information privacy","level":2,"score":0.29330000281333923},{"id":"https://openalex.org/C99498987","wikidata":"https://www.wikidata.org/wiki/Q2210247","display_name":"Noise (video)","level":3,"score":0.2824999988079071},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.27959999442100525},{"id":"https://openalex.org/C126255220","wikidata":"https://www.wikidata.org/wiki/Q141495","display_name":"Mathematical optimization","level":1,"score":0.2766000032424927},{"id":"https://openalex.org/C93226319","wikidata":"https://www.wikidata.org/wiki/Q193137","display_name":"Differential (mechanical device)","level":2,"score":0.2759999930858612},{"id":"https://openalex.org/C3017597292","wikidata":"https://www.wikidata.org/wiki/Q25052250","display_name":"Privacy protection","level":2,"score":0.272599995136261},{"id":"https://openalex.org/C80444323","wikidata":"https://www.wikidata.org/wiki/Q2878974","display_name":"Theoretical computer science","level":1,"score":0.271699994802475},{"id":"https://openalex.org/C36299963","wikidata":"https://www.wikidata.org/wiki/Q1369844","display_name":"Observability","level":2,"score":0.25540000200271606},{"id":"https://openalex.org/C116834253","wikidata":"https://www.wikidata.org/wiki/Q2039217","display_name":"Identification (biology)","level":2,"score":0.2547999918460846}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/tnse.2026.3679928","is_oa":false,"landing_page_url":"https://doi.org/10.1109/tnse.2026.3679928","pdf_url":null,"source":{"id":"https://openalex.org/S2484352698","display_name":"IEEE Transactions on Network Science and Engineering","issn_l":"2327-4697","issn":["2327-4697","2334-329X"],"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 Transactions on Network Science and Engineering","raw_type":"journal-article"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[{"id":"https://openalex.org/G5461883845","display_name":null,"funder_award_id":"CSTB2024NSCQ-LZX0084","funder_id":"https://openalex.org/F4320323172","funder_display_name":"Natural Science Foundation of Chongqing"},{"id":"https://openalex.org/G6005639586","display_name":null,"funder_award_id":"62372075","funder_id":"https://openalex.org/F4320321001","funder_display_name":"National Natural Science Foundation of China"}],"funders":[{"id":"https://openalex.org/F4320321001","display_name":"National Natural Science Foundation of China","ror":"https://ror.org/01h0zpd94"},{"id":"https://openalex.org/F4320323172","display_name":"Natural Science Foundation of Chongqing","ror":"https://ror.org/01h0zpd94"}],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":0,"referenced_works":[],"related_works":[],"abstract_inverted_index":{"Vehicle":[0],"trajectory":[1,19,45,63],"data":[2,20,46,140],"play":[3],"a":[4,98,148,154],"crucial":[5],"role":[6],"in":[7,69,85,124,173,202],"traffic":[8,10],"management,":[9],"prediction,":[11],"and":[12,65,153,168,181,191],"location-based":[13],"services.":[14],"However,":[15,36],"directly":[16],"publishing":[17,33],"raw":[18,175],"poses":[21],"significant":[22],"risks":[23],"to":[24,78],"user":[25],"privacy.":[26],"Differential":[27],"privacy":[28],"addresses":[29],"this":[30,94],"issue":[31],"by":[32],"synthetic":[34,86,139,185],"datasets.":[35],"existing":[37],"approaches":[38],"often":[39],"overlook":[40],"the":[41,60,66,79,131,170,174,179,184,206],"temporal":[42,54,83],"characteristics":[43],"of":[44,62,81,134,159,183,214],"or":[47],"assume":[48],"uniform":[49],"time":[50,67,122,136],"intervals.":[51],"In":[52,93],"reality,":[53],"information":[55,84],"is":[56],"essential":[57],"for":[58,100],"maintaining":[59],"utility":[61,203],"data,":[64,176],"intervals":[68,123,137],"real-world":[70,190],"trajectories":[71],"are":[72],"typically":[73],"non-uniform.":[74],"This":[75],"discrepancy":[76],"leads":[77],"loss":[80],"substantial":[82],"datasets,":[87,126],"which":[88,160],"severely":[89],"undermines":[90],"their":[91],"utility.":[92,141],"paper,":[95],"we":[96,146],"propose":[97],"method":[99],"<underline":[101,104,107,111,114],"xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"":[102,105,108,112,115,118,128,144,197],"xmlns:xlink=\"http://www.w3.org/1999/xlink\">S</u>patio-temporal":[103],"xmlns:xlink=\"http://www.w3.org/1999/xlink\">T</u>rajectory":[106],"xmlns:xlink=\"http://www.w3.org/1999/xlink\">S</u>ynthesis":[109],"with":[110],"xmlns:xlink=\"http://www.w3.org/1999/xlink\">D</u>ifferential":[113],"xmlns:xlink=\"http://www.w3.org/1999/xlink\">P</u>rivacy":[116],"(<italic":[117],"xmlns:xlink=\"http://www.w3.org/1999/xlink\">DP-STS</i>).":[119],"By":[120],"normalizing":[121],"input":[125],"<italic":[127,143,196],"xmlns:xlink=\"http://www.w3.org/1999/xlink\">DP-STS</i>":[129,198],"mitigates":[130],"negative":[132],"impact":[133],"irregular":[135],"on":[138,189],"Within":[142],"xmlns:xlink=\"http://www.w3.org/1999/xlink\">DP-STS</i>,":[145],"introduce":[147],"spatio-temporal":[149,162,171],"movement":[150],"probability":[151],"model":[152],"start-position/start-time":[155],"association":[156],"matrix,":[157],"both":[158],"capture":[161],"correlations.":[163],"These":[164],"components":[165],"effectively":[166],"extract":[167],"preserve":[169],"correlations":[172],"substantially":[177],"improving":[178],"authenticity":[180],"validity":[182],"trajectories.":[186],"Extensive":[187],"experiments":[188],"generated":[192],"datasets":[193],"demonstrate":[194],"that":[195],"outperforms":[199],"state-of-the-art":[200],"methods":[201],"preservation.":[204],"Specifically,":[205],"proposed":[207],"approach":[208],"achieves":[209],"an":[210],"average":[211],"performance":[212],"improvement":[213],"47%.":[215]},"counts_by_year":[],"updated_date":"2026-04-14T06:02:45.956762","created_date":"2026-04-03T00:00:00"}