{"id":"https://openalex.org/W2793592718","doi":"https://doi.org/10.1109/tcomm.2018.2815017","title":"Joint Multicast and Unicast Beamforming for Coded Caching","display_name":"Joint Multicast and Unicast Beamforming for Coded Caching","publication_year":2018,"publication_date":"2018-03-12","ids":{"openalex":"https://openalex.org/W2793592718","doi":"https://doi.org/10.1109/tcomm.2018.2815017","mag":"2793592718"},"language":"en","primary_location":{"id":"doi:10.1109/tcomm.2018.2815017","is_oa":false,"landing_page_url":"https://doi.org/10.1109/tcomm.2018.2815017","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":"https://openalex.org/A5101902909","display_name":"Shan Zhong","orcid":"https://orcid.org/0000-0003-0034-6952"},"institutions":[{"id":"https://openalex.org/I78577930","display_name":"Columbia University","ror":"https://ror.org/00hj8s172","country_code":"US","type":"education","lineage":["https://openalex.org/I78577930"]}],"countries":["US"],"is_corresponding":true,"raw_author_name":"Shan Zhong","raw_affiliation_strings":["Department of Electrical Engineering, Columbia University, New York, NY, USA"],"affiliations":[{"raw_affiliation_string":"Department of Electrical Engineering, Columbia University, New York, NY, USA","institution_ids":["https://openalex.org/I78577930"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5100382658","display_name":"Xiaodong Wang","orcid":"https://orcid.org/0000-0002-2945-9240"},"institutions":[{"id":"https://openalex.org/I78577930","display_name":"Columbia University","ror":"https://ror.org/00hj8s172","country_code":"US","type":"education","lineage":["https://openalex.org/I78577930"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Xiaodong Wang","raw_affiliation_strings":["Department of Electrical Engineering, Columbia University, New York, NY, USA"],"affiliations":[{"raw_affiliation_string":"Department of Electrical Engineering, Columbia University, New York, NY, USA","institution_ids":["https://openalex.org/I78577930"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":2,"corresponding_author_ids":["https://openalex.org/A5101902909"],"corresponding_institution_ids":["https://openalex.org/I78577930"],"apc_list":null,"apc_paid":null,"fwci":1.1072,"has_fulltext":false,"cited_by_count":9,"citation_normalized_percentile":{"value":0.79619697,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":97},"biblio":{"volume":"66","issue":"8","first_page":"3354","last_page":"3367"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11478","display_name":"Caching and Content Delivery","score":0.9998999834060669,"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/T11478","display_name":"Caching and Content Delivery","score":0.9998999834060669,"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/T10796","display_name":"Cooperative Communication and Network Coding","score":0.9991000294685364,"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/T10148","display_name":"Advanced MIMO Systems Optimization","score":0.9929999709129333,"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/multicast","display_name":"Multicast","score":0.8541700839996338},{"id":"https://openalex.org/keywords/unicast","display_name":"Unicast","score":0.7711173295974731},{"id":"https://openalex.org/keywords/beamforming","display_name":"Beamforming","score":0.7666488885879517},{"id":"https://openalex.org/keywords/joint","display_name":"Joint (building)","score":0.7122335433959961},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.6726152300834656},{"id":"https://openalex.org/keywords/computer-network","display_name":"Computer network","score":0.6080580353736877},{"id":"https://openalex.org/keywords/telecommunications","display_name":"Telecommunications","score":0.23633253574371338},{"id":"https://openalex.org/keywords/engineering","display_name":"Engineering","score":0.17114681005477905}],"concepts":[{"id":"https://openalex.org/C32295351","wikidata":"https://www.wikidata.org/wiki/Q899288","display_name":"Multicast","level":2,"score":0.8541700839996338},{"id":"https://openalex.org/C11704745","wikidata":"https://www.wikidata.org/wiki/Q918337","display_name":"Unicast","level":3,"score":0.7711173295974731},{"id":"https://openalex.org/C54197355","wikidata":"https://www.wikidata.org/wiki/Q5782992","display_name":"Beamforming","level":2,"score":0.7666488885879517},{"id":"https://openalex.org/C18555067","wikidata":"https://www.wikidata.org/wiki/Q8375051","display_name":"Joint (building)","level":2,"score":0.7122335433959961},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.6726152300834656},{"id":"https://openalex.org/C31258907","wikidata":"https://www.wikidata.org/wiki/Q1301371","display_name":"Computer network","level":1,"score":0.6080580353736877},{"id":"https://openalex.org/C76155785","wikidata":"https://www.wikidata.org/wiki/Q418","display_name":"Telecommunications","level":1,"score":0.23633253574371338},{"id":"https://openalex.org/C127413603","wikidata":"https://www.wikidata.org/wiki/Q11023","display_name":"Engineering","level":0,"score":0.17114681005477905},{"id":"https://openalex.org/C170154142","wikidata":"https://www.wikidata.org/wiki/Q150737","display_name":"Architectural engineering","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/tcomm.2018.2815017","is_oa":false,"landing_page_url":"https://doi.org/10.1109/tcomm.2018.2815017","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":[{"id":"https://metadata.un.org/sdg/17","score":0.5,"display_name":"Partnerships for the goals"}],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":30,"referenced_works":["https://openalex.org/W89654658","https://openalex.org/W1494875490","https://openalex.org/W1597797001","https://openalex.org/W1804110266","https://openalex.org/W1964176378","https://openalex.org/W1967236223","https://openalex.org/W1970830346","https://openalex.org/W1979408141","https://openalex.org/W1981044874","https://openalex.org/W2064969374","https://openalex.org/W2081893537","https://openalex.org/W2093763487","https://openalex.org/W2096220631","https://openalex.org/W2100755644","https://openalex.org/W2106248279","https://openalex.org/W2129821947","https://openalex.org/W2136608712","https://openalex.org/W2169363112","https://openalex.org/W2213621529","https://openalex.org/W2508764403","https://openalex.org/W2511268924","https://openalex.org/W2513101600","https://openalex.org/W2515080779","https://openalex.org/W2547161317","https://openalex.org/W2559962697","https://openalex.org/W2606348571","https://openalex.org/W2963102996","https://openalex.org/W3103833233","https://openalex.org/W4205293427","https://openalex.org/W6603640814"],"related_works":["https://openalex.org/W1966768284","https://openalex.org/W2141226803","https://openalex.org/W1972955796","https://openalex.org/W2978800595","https://openalex.org/W2219910205","https://openalex.org/W1541857863","https://openalex.org/W207048982","https://openalex.org/W2026651734","https://openalex.org/W2385427787","https://openalex.org/W2167268310"],"abstract_inverted_index":{"In":[0],"this":[1],"paper,":[2],"we":[3],"consider":[4],"a":[5,100,121],"multicell":[6],"system":[7,63],"with":[8,129],"cache-equipped":[9],"base":[10],"stations":[11],"(BSs)":[12],"and":[13,33,39,54,79,119],"users.":[14,44,60],"A":[15],"coded":[16,51],"caching":[17],"scheme":[18],"is":[19],"employed":[20],"at":[21,36,42],"user":[22,88],"ends":[23],"such":[24],"that":[25],"multiple":[26],"requested":[27],"file":[28],"contents":[29],"can":[30,47],"be":[31],"combined":[32],"encoded":[34],"together":[35],"the":[37,43,50,56,76,86,93,107,112,116,130,142,145],"BS,":[38],"decoded":[40],"successfully":[41],"The":[45],"BSs":[46],"then":[48],"multicast":[49,78],"cached":[52],"content":[53,58],"unicast":[55,80],"uncached":[57],"to":[59,84,92,105,140],"Two":[61],"different":[62,69],"models":[64],"are":[65,138],"proposed":[66,146],"based":[67],"on":[68,111],"levels":[70],"of":[71,115,144],"BS":[72,95],"cooperation.":[73],"We":[74,98],"formulate":[75],"joint":[77],"beamformer":[81],"design":[82],"problem":[83],"maximize":[85],"weighted":[87],"fairness":[89],"rate":[90],"subject":[91],"per":[94],"power":[96],"constraint.":[97],"propose":[99],"Riemannian":[101],"conjugate":[102],"gradient":[103],"algorithm":[104],"solve":[106],"problem,":[108],"which":[109],"operates":[110],"multi-sphere":[113],"manifold":[114],"parameter":[117],"space":[118],"has":[120],"low":[122],"computational":[123],"complexity":[124],"but":[125],"better":[126],"performance":[127,143],"compared":[128],"existing":[131],"semi-definite":[132],"relaxation":[133],"methods.":[134],"Extensive":[135],"simulation":[136],"results":[137],"provided":[139],"demonstrate":[141],"systems.":[147]},"counts_by_year":[{"year":2024,"cited_by_count":1},{"year":2022,"cited_by_count":2},{"year":2021,"cited_by_count":1},{"year":2020,"cited_by_count":3},{"year":2019,"cited_by_count":1},{"year":2018,"cited_by_count":1}],"updated_date":"2025-11-06T03:46:38.306776","created_date":"2025-10-10T00:00:00"}