{"id":"https://openalex.org/W4403864160","doi":"https://doi.org/10.1109/tcomm.2024.3487799","title":"Optimizing Information Freshness in Uplink Multiuser MIMO Networks With Partial Observations","display_name":"Optimizing Information Freshness in Uplink Multiuser MIMO Networks With Partial Observations","publication_year":2024,"publication_date":"2024-10-29","ids":{"openalex":"https://openalex.org/W4403864160","doi":"https://doi.org/10.1109/tcomm.2024.3487799"},"language":"en","primary_location":{"id":"doi:10.1109/tcomm.2024.3487799","is_oa":false,"landing_page_url":"https://doi.org/10.1109/tcomm.2024.3487799","pdf_url":null,"source":{"id":"https://openalex.org/S196647941","display_name":"IEEE Transactions on Communications","issn_l":"0090-6778","issn":["0090-6778","1558-0857"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310316002","host_organization_name":"IEEE Communications Society","host_organization_lineage":["https://openalex.org/P4310316002","https://openalex.org/P4310319808"],"host_organization_lineage_names":["IEEE Communications Society","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 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":null,"display_name":"Jingwei Liu","orcid":"https://orcid.org/0009-0000-3111-026X"},"institutions":[{"id":"https://openalex.org/I177725633","display_name":"Chinese University of Hong Kong","ror":"https://ror.org/00t33hh48","country_code":"HK","type":"education","lineage":["https://openalex.org/I177725633"]}],"countries":["HK"],"is_corresponding":false,"raw_author_name":"Jingwei Liu","raw_affiliation_strings":["Department of Information Engineering, The Chinese University of Hong Kong, Hong Kong, SAR, China","Department of Information Engineering, The Chinese University of Hong Kong, Hong Kong SAR, China"],"raw_orcid":"https://orcid.org/0009-0000-3111-026X","affiliations":[{"raw_affiliation_string":"Department of Information Engineering, The Chinese University of Hong Kong, Hong Kong, SAR, China","institution_ids":["https://openalex.org/I177725633"]},{"raw_affiliation_string":"Department of Information Engineering, The Chinese University of Hong Kong, Hong Kong SAR, China","institution_ids":["https://openalex.org/I177725633"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5100390977","display_name":"Qian Wang","orcid":"https://orcid.org/0000-0001-5072-5518"},"institutions":[{"id":"https://openalex.org/I177725633","display_name":"Chinese University of Hong Kong","ror":"https://ror.org/00t33hh48","country_code":"HK","type":"education","lineage":["https://openalex.org/I177725633"]}],"countries":["HK"],"is_corresponding":false,"raw_author_name":"Qian Wang","raw_affiliation_strings":["Department of Information Engineering, The Chinese University of Hong Kong, Hong Kong, SAR, China","Department of Information Engineering, The Chinese University of Hong Kong, Hong Kong SAR, China"],"raw_orcid":"https://orcid.org/0000-0001-5072-5518","affiliations":[{"raw_affiliation_string":"Department of Information Engineering, The Chinese University of Hong Kong, Hong Kong, SAR, China","institution_ids":["https://openalex.org/I177725633"]},{"raw_affiliation_string":"Department of Information Engineering, The Chinese University of Hong Kong, Hong Kong SAR, China","institution_ids":["https://openalex.org/I177725633"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5100327671","display_name":"He Chen","orcid":"https://orcid.org/0000-0001-8886-9680"},"institutions":[{"id":"https://openalex.org/I177725633","display_name":"Chinese University of Hong Kong","ror":"https://ror.org/00t33hh48","country_code":"HK","type":"education","lineage":["https://openalex.org/I177725633"]}],"countries":["HK"],"is_corresponding":false,"raw_author_name":"He Chen","raw_affiliation_strings":["Department of Information Engineering, The Chinese University of Hong Kong, Hong Kong, SAR, China","Department of Information Engineering, The Chinese University of Hong Kong, Hong Kong SAR, China"],"raw_orcid":"https://orcid.org/0000-0001-8886-9680","affiliations":[{"raw_affiliation_string":"Department of Information Engineering, The Chinese University of Hong Kong, Hong Kong, SAR, China","institution_ids":["https://openalex.org/I177725633"]},{"raw_affiliation_string":"Department of Information Engineering, The Chinese University of Hong Kong, Hong Kong SAR, China","institution_ids":["https://openalex.org/I177725633"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":[],"corresponding_institution_ids":["https://openalex.org/I177725633"],"apc_list":null,"apc_paid":null,"fwci":0.5682,"has_fulltext":false,"cited_by_count":2,"citation_normalized_percentile":{"value":0.69063385,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":95,"max":96},"biblio":{"volume":"73","issue":"5","first_page":"3380","last_page":"3393"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T13553","display_name":"Age of Information Optimization","score":0.9894999861717224,"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/T13553","display_name":"Age of Information Optimization","score":0.9894999861717224,"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/T12079","display_name":"IoT Networks and Protocols","score":0.9657999873161316,"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/T10148","display_name":"Advanced MIMO Systems Optimization","score":0.9563000202178955,"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"}}],"keywords":[{"id":"https://openalex.org/keywords/telecommunications-link","display_name":"Telecommunications link","score":0.8477641344070435},{"id":"https://openalex.org/keywords/mimo","display_name":"MIMO","score":0.6574641466140747},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.6128372550010681},{"id":"https://openalex.org/keywords/computer-network","display_name":"Computer network","score":0.477411150932312},{"id":"https://openalex.org/keywords/electronic-engineering","display_name":"Electronic engineering","score":0.3939693570137024},{"id":"https://openalex.org/keywords/telecommunications","display_name":"Telecommunications","score":0.3844187259674072},{"id":"https://openalex.org/keywords/beamforming","display_name":"Beamforming","score":0.21352988481521606},{"id":"https://openalex.org/keywords/engineering","display_name":"Engineering","score":0.2106051743030548}],"concepts":[{"id":"https://openalex.org/C138660444","wikidata":"https://www.wikidata.org/wiki/Q5607897","display_name":"Telecommunications link","level":2,"score":0.8477641344070435},{"id":"https://openalex.org/C207987634","wikidata":"https://www.wikidata.org/wiki/Q176862","display_name":"MIMO","level":3,"score":0.6574641466140747},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.6128372550010681},{"id":"https://openalex.org/C31258907","wikidata":"https://www.wikidata.org/wiki/Q1301371","display_name":"Computer network","level":1,"score":0.477411150932312},{"id":"https://openalex.org/C24326235","wikidata":"https://www.wikidata.org/wiki/Q126095","display_name":"Electronic engineering","level":1,"score":0.3939693570137024},{"id":"https://openalex.org/C76155785","wikidata":"https://www.wikidata.org/wiki/Q418","display_name":"Telecommunications","level":1,"score":0.3844187259674072},{"id":"https://openalex.org/C54197355","wikidata":"https://www.wikidata.org/wiki/Q5782992","display_name":"Beamforming","level":2,"score":0.21352988481521606},{"id":"https://openalex.org/C127413603","wikidata":"https://www.wikidata.org/wiki/Q11023","display_name":"Engineering","level":0,"score":0.2106051743030548}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/tcomm.2024.3487799","is_oa":false,"landing_page_url":"https://doi.org/10.1109/tcomm.2024.3487799","pdf_url":null,"source":{"id":"https://openalex.org/S196647941","display_name":"IEEE Transactions on Communications","issn_l":"0090-6778","issn":["0090-6778","1558-0857"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310316002","host_organization_name":"IEEE Communications Society","host_organization_lineage":["https://openalex.org/P4310316002","https://openalex.org/P4310319808"],"host_organization_lineage_names":["IEEE Communications Society","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 Communications","raw_type":"journal-article"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[],"funders":[],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":51,"referenced_works":["https://openalex.org/W1968192955","https://openalex.org/W1993918491","https://openalex.org/W2032100464","https://openalex.org/W2079466885","https://openalex.org/W2100183117","https://openalex.org/W2113703908","https://openalex.org/W2116753650","https://openalex.org/W2125933266","https://openalex.org/W2137152139","https://openalex.org/W2140308859","https://openalex.org/W2146487252","https://openalex.org/W2168359464","https://openalex.org/W2763786603","https://openalex.org/W2962879668","https://openalex.org/W2963053102","https://openalex.org/W2963270598","https://openalex.org/W2968526727","https://openalex.org/W2978754470","https://openalex.org/W2995433474","https://openalex.org/W2995485083","https://openalex.org/W3003589928","https://openalex.org/W3018493579","https://openalex.org/W3048550153","https://openalex.org/W3082478152","https://openalex.org/W3087880859","https://openalex.org/W3102260691","https://openalex.org/W3116998518","https://openalex.org/W3126992230","https://openalex.org/W3132341739","https://openalex.org/W3138649231","https://openalex.org/W3161727728","https://openalex.org/W3207514672","https://openalex.org/W3215864010","https://openalex.org/W4205984110","https://openalex.org/W4206904596","https://openalex.org/W4211024811","https://openalex.org/W4212996499","https://openalex.org/W4250589301","https://openalex.org/W4362683620","https://openalex.org/W4383109543","https://openalex.org/W4388730441","https://openalex.org/W4390098148","https://openalex.org/W6680602851","https://openalex.org/W6693997783","https://openalex.org/W6694532129","https://openalex.org/W6737069938","https://openalex.org/W6751659697","https://openalex.org/W6755069753","https://openalex.org/W6766805167","https://openalex.org/W6791447076","https://openalex.org/W6796436736"],"related_works":["https://openalex.org/W2548963335","https://openalex.org/W2159941915","https://openalex.org/W1995129237","https://openalex.org/W4388081250","https://openalex.org/W2909457694","https://openalex.org/W1761601995","https://openalex.org/W2904599916","https://openalex.org/W4321608401","https://openalex.org/W4300468626","https://openalex.org/W3193749313"],"abstract_inverted_index":{"This":[0],"paper":[1],"investigates":[2],"a":[3,18,100,139,146,182,188],"multiuser":[4],"scheduling":[5,141,190],"problem":[6],"within":[7],"an":[8,160,198],"uplink":[9],"multiple-input":[10],"multi-output":[11],"(MIMO)":[12],"status":[13,42,85],"update":[14],"network,":[15,184],"consisting":[16],"of":[17,29,41,63,84,112,163,221],"multi-antenna":[19],"base":[20],"station":[21],"(BS)":[22],"and":[23,107,157,185,224,233,252],"multiple":[24,30,45],"single-antenna":[25],"devices.":[26],"The":[27],"presence":[28],"antennas":[31],"at":[32,87],"the":[33,61,70,81,88,110,155,172,195,218,236,240,248,255],"BS":[34,71],"introduces":[35],"spatial":[36],"degrees-of-freedom,":[37],"enabling":[38],"concurrent":[39],"transmission":[40],"updates":[43,86],"from":[44],"devices":[46,117],"in":[47,149],"each":[48,150],"time":[49,151],"slot.":[50],"Our":[51,227],"objective":[52],"is":[53,118,168,213],"to":[54,153,170,215,247],"optimize":[55,171],"network-wide":[56],"information":[57,64],"freshness,":[58],"quantified":[59],"by":[60,67,130],"age":[62],"(AoI)":[65],"metric,":[66],"determining":[68],"how":[69],"can":[72,127],"best":[73],"schedule":[74],"device":[75,89],"transmissions,":[76],"while":[77],"taking":[78],"into":[79],"account":[80],"random":[82],"arrival":[83],"side.":[90],"To":[91,175],"address":[92],"this":[93],"decision-making":[94],"problem,":[95],"we":[96,137,180],"model":[97],"it":[98],"as":[99],"partially":[101],"observable":[102],"Markov":[103],"decision":[104],"process":[105],"(POMDP)":[106],"establish":[108],"that":[109,123,144,193,235],"evolution":[111],"belief":[113,125],"states":[114,126],"for":[115],"different":[116],"independent.":[119],"We":[120],"also":[121],"prove":[122],"feasible":[124],"be":[128],"described":[129],"finite-dimensional":[131],"vectors.":[132],"Building":[133],"on":[134],"these":[135],"observations,":[136],"develop":[138],"dynamic":[140],"(DS)":[142],"policy":[143,192,238],"minimizes":[145,194],"configurable":[147],"drift":[148,196],"slot":[152],"solve":[154],"POMDP,":[156],"then":[158],"derive":[159],"upper":[161],"bound":[162],"its":[164],"AoI":[165],"performance,":[166],"which":[167],"used":[169],"parameter":[173],"configuration.":[174],"gain":[176],"more":[177],"design":[178],"insights,":[179],"investigate":[181],"symmetric":[183],"put":[186],"forth":[187],"fixed":[189,200],"(FS)":[191],"with":[197,239],"optimized":[199],"number":[201],"scheduling,":[202],"thereby":[203],"yielding":[204],"lower":[205],"computational":[206,219],"complexity.":[207],"An":[208],"action":[209,242],"space":[210,243],"reduction":[211],"strategy":[212],"applied":[214],"further":[216],"reduce":[217],"complexity":[220],"both":[222,253],"DS":[223,237,250],"FS":[225],"policies.":[226,257],"numerical":[228],"results":[229],"validate":[230],"our":[231],"analyses":[232],"indicate":[234],"reduced":[241],"performs":[244],"almost":[245],"identically":[246],"original":[249],"policy,":[251],"outperform":[254],"baseline":[256]},"counts_by_year":[{"year":2025,"cited_by_count":2}],"updated_date":"2026-03-27T05:58:40.876381","created_date":"2025-10-10T00:00:00"}