{"id":"https://openalex.org/W2920374248","doi":"https://doi.org/10.1109/glocomw.2018.8644073","title":"Downlink Optimization in Cloud Radio Access Networks with Hybrid RF/FSO Fronthaul","display_name":"Downlink Optimization in Cloud Radio Access Networks with Hybrid RF/FSO Fronthaul","publication_year":2018,"publication_date":"2018-12-01","ids":{"openalex":"https://openalex.org/W2920374248","doi":"https://doi.org/10.1109/glocomw.2018.8644073","mag":"2920374248"},"language":"en","primary_location":{"id":"doi:10.1109/glocomw.2018.8644073","is_oa":false,"landing_page_url":"https://doi.org/10.1109/glocomw.2018.8644073","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2018 IEEE Globecom Workshops (GC Wkshps)","raw_type":"proceedings-article"},"type":"conference-paper","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/A5056703589","display_name":"Ayman Mostafa","orcid":"https://orcid.org/0000-0002-5975-5059"},"institutions":[{"id":"https://openalex.org/I141945490","display_name":"University of British Columbia","ror":"https://ror.org/03rmrcq20","country_code":"CA","type":"education","lineage":["https://openalex.org/I141945490"]}],"countries":["CA"],"is_corresponding":false,"raw_author_name":"Ayman Mostafa","raw_affiliation_strings":["Department of Electrical and Computer Engineering, The University of British Columbia, Vancouver, BC, Canada"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Electrical and Computer Engineering, The University of British Columbia, Vancouver, BC, Canada","institution_ids":["https://openalex.org/I141945490"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5052549336","display_name":"Lutz Lampe","orcid":"https://orcid.org/0000-0002-6583-1978"},"institutions":[{"id":"https://openalex.org/I141945490","display_name":"University of British Columbia","ror":"https://ror.org/03rmrcq20","country_code":"CA","type":"education","lineage":["https://openalex.org/I141945490"]}],"countries":["CA"],"is_corresponding":false,"raw_author_name":"Lutz Lampe","raw_affiliation_strings":["Department of Electrical and Computer Engineering, The University of British Columbia, Vancouver, BC, Canada"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Electrical and Computer Engineering, The University of British Columbia, Vancouver, BC, Canada","institution_ids":["https://openalex.org/I141945490"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":[],"corresponding_institution_ids":["https://openalex.org/I141945490"],"apc_list":null,"apc_paid":null,"fwci":null,"has_fulltext":false,"cited_by_count":5,"citation_normalized_percentile":null,"cited_by_percentile_year":null,"biblio":{"volume":null,"issue":null,"first_page":"1","last_page":"7"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10767","display_name":"Advanced Photonic Communication Systems","score":0.9998999834060669,"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"}},"topics":[{"id":"https://openalex.org/T10767","display_name":"Advanced Photonic Communication Systems","score":0.9998999834060669,"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/T10851","display_name":"Optical Wireless Communication Technologies","score":0.9998999834060669,"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":0.9991000294685364,"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/radio-access-network","display_name":"Radio access network","score":0.7174501419067383},{"id":"https://openalex.org/keywords/telecommunications-link","display_name":"Telecommunications link","score":0.7011786103248596},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.6646646857261658},{"id":"https://openalex.org/keywords/c-ran","display_name":"C-RAN","score":0.5861487984657288},{"id":"https://openalex.org/keywords/baseband","display_name":"Baseband","score":0.5757608413696289},{"id":"https://openalex.org/keywords/computer-network","display_name":"Computer network","score":0.5284034013748169},{"id":"https://openalex.org/keywords/remote-radio-head","display_name":"Remote radio head","score":0.4932186007499695},{"id":"https://openalex.org/keywords/radio-over-fiber","display_name":"Radio over fiber","score":0.4542243778705597},{"id":"https://openalex.org/keywords/electronic-engineering","display_name":"Electronic engineering","score":0.44118532538414},{"id":"https://openalex.org/keywords/wireless","display_name":"Wireless","score":0.4292522668838501},{"id":"https://openalex.org/keywords/radio-resource-management","display_name":"Radio resource management","score":0.4167739450931549},{"id":"https://openalex.org/keywords/radio-frequency","display_name":"Radio frequency","score":0.4162241816520691},{"id":"https://openalex.org/keywords/wireless-network","display_name":"Wireless network","score":0.4152463972568512},{"id":"https://openalex.org/keywords/channel","display_name":"Channel (broadcasting)","score":0.34711772203445435},{"id":"https://openalex.org/keywords/bandwidth","display_name":"Bandwidth (computing)","score":0.25417980551719666},{"id":"https://openalex.org/keywords/engineering","display_name":"Engineering","score":0.21600830554962158},{"id":"https://openalex.org/keywords/telecommunications","display_name":"Telecommunications","score":0.2143576443195343},{"id":"https://openalex.org/keywords/base-station","display_name":"Base station","score":0.10885554552078247},{"id":"https://openalex.org/keywords/transmitter","display_name":"Transmitter","score":0.1028505265712738}],"concepts":[{"id":"https://openalex.org/C106365562","wikidata":"https://www.wikidata.org/wiki/Q3078360","display_name":"Radio access network","level":4,"score":0.7174501419067383},{"id":"https://openalex.org/C138660444","wikidata":"https://www.wikidata.org/wiki/Q5607897","display_name":"Telecommunications link","level":2,"score":0.7011786103248596},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.6646646857261658},{"id":"https://openalex.org/C2779765720","wikidata":"https://www.wikidata.org/wiki/Q5005908","display_name":"C-RAN","level":5,"score":0.5861487984657288},{"id":"https://openalex.org/C65165936","wikidata":"https://www.wikidata.org/wiki/Q575784","display_name":"Baseband","level":3,"score":0.5757608413696289},{"id":"https://openalex.org/C31258907","wikidata":"https://www.wikidata.org/wiki/Q1301371","display_name":"Computer network","level":1,"score":0.5284034013748169},{"id":"https://openalex.org/C101541887","wikidata":"https://www.wikidata.org/wiki/Q1555675","display_name":"Remote radio head","level":4,"score":0.4932186007499695},{"id":"https://openalex.org/C2780113332","wikidata":"https://www.wikidata.org/wiki/Q16045086","display_name":"Radio over fiber","level":3,"score":0.4542243778705597},{"id":"https://openalex.org/C24326235","wikidata":"https://www.wikidata.org/wiki/Q126095","display_name":"Electronic engineering","level":1,"score":0.44118532538414},{"id":"https://openalex.org/C555944384","wikidata":"https://www.wikidata.org/wiki/Q249","display_name":"Wireless","level":2,"score":0.4292522668838501},{"id":"https://openalex.org/C182448111","wikidata":"https://www.wikidata.org/wiki/Q7281197","display_name":"Radio resource management","level":4,"score":0.4167739450931549},{"id":"https://openalex.org/C74064498","wikidata":"https://www.wikidata.org/wiki/Q3396184","display_name":"Radio frequency","level":2,"score":0.4162241816520691},{"id":"https://openalex.org/C108037233","wikidata":"https://www.wikidata.org/wiki/Q11375","display_name":"Wireless network","level":3,"score":0.4152463972568512},{"id":"https://openalex.org/C127162648","wikidata":"https://www.wikidata.org/wiki/Q16858953","display_name":"Channel (broadcasting)","level":2,"score":0.34711772203445435},{"id":"https://openalex.org/C2776257435","wikidata":"https://www.wikidata.org/wiki/Q1576430","display_name":"Bandwidth (computing)","level":2,"score":0.25417980551719666},{"id":"https://openalex.org/C127413603","wikidata":"https://www.wikidata.org/wiki/Q11023","display_name":"Engineering","level":0,"score":0.21600830554962158},{"id":"https://openalex.org/C76155785","wikidata":"https://www.wikidata.org/wiki/Q418","display_name":"Telecommunications","level":1,"score":0.2143576443195343},{"id":"https://openalex.org/C68649174","wikidata":"https://www.wikidata.org/wiki/Q1379116","display_name":"Base station","level":2,"score":0.10885554552078247},{"id":"https://openalex.org/C47798520","wikidata":"https://www.wikidata.org/wiki/Q190157","display_name":"Transmitter","level":3,"score":0.1028505265712738},{"id":"https://openalex.org/C207029474","wikidata":"https://www.wikidata.org/wiki/Q384018","display_name":"Mobile station","level":3,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/glocomw.2018.8644073","is_oa":false,"landing_page_url":"https://doi.org/10.1109/glocomw.2018.8644073","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2018 IEEE Globecom Workshops (GC Wkshps)","raw_type":"proceedings-article"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[],"funders":[],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":18,"referenced_works":["https://openalex.org/W1519405745","https://openalex.org/W1978842364","https://openalex.org/W2019905317","https://openalex.org/W2050815608","https://openalex.org/W2070394551","https://openalex.org/W2098126478","https://openalex.org/W2100755644","https://openalex.org/W2136253824","https://openalex.org/W2163762663","https://openalex.org/W2206690184","https://openalex.org/W2339410153","https://openalex.org/W2478708596","https://openalex.org/W2579498866","https://openalex.org/W2608727628","https://openalex.org/W2963652759","https://openalex.org/W2964290224","https://openalex.org/W3159068915","https://openalex.org/W4239066252"],"related_works":["https://openalex.org/W2786634913","https://openalex.org/W2773669089","https://openalex.org/W2117039245","https://openalex.org/W2739898020","https://openalex.org/W3119699729","https://openalex.org/W2971311246","https://openalex.org/W2523355484","https://openalex.org/W2470976061","https://openalex.org/W2584135521","https://openalex.org/W1482301650"],"abstract_inverted_index":{"This":[0],"paper":[1],"studies":[2],"the":[3,33,36,59,69,72,77,88,103,106,122,126,144,149,153,160,166,170,177,181,191,232,235,245],"downlink":[4,66],"of":[5,27,58,108,152,159,169,180,190,234,248],"a":[6,14,25,50,84,207,222],"cloud":[7],"radio":[8,21,52],"access":[9],"network":[10,26,40,124],"(C-RAN)":[11],"that":[12,31,210],"incorporates":[13],"baseband":[15],"central":[16],"processor":[17],"(CP),":[18],"multiple":[19],"remote":[20],"units":[22],"(RUs),":[23],"and":[24,90,111,135,157,187,200,214],"wireless":[28],"fronthaul":[29,39,89,123,162,193],"links":[30,47],"connect":[32],"RUs":[34,70],"to":[35,71,125,143,175,184,202,220,230,254],"CP.":[37],"The":[38,56,92,129,195],"utilizes":[41,211],"dedicated":[42],"point-to-point":[43],"free-space":[44],"optical":[45],"(FSO)":[46],"along":[48,164],"with":[49,165],"broadcast":[51],"frequency":[53],"(RF)":[54],"channel.":[55],"spectrum":[57,80],"RF":[60,79,141,161,171],"channel":[61],"is":[62,81,198],"also":[63,243],"utilized":[64],"for":[65,96],"transmission":[67],"from":[68],"mobile":[73],"users.":[74,145],"That":[75],"is,":[76],"available":[78],"time-shared":[82],"(in":[83],"half-duplex":[85],"manner)":[86],"among":[87],"downlink.":[91],"data":[93],"symbols":[94],"intended":[95],"different":[97,239],"users":[98],"are":[99,117],"linearly":[100],"precoded":[101],"at":[102],"CP":[104],"in":[105,131,173,218],"form":[107],"quantized":[109],"in-phase":[110],"quadrature":[112],"(IQ)":[113],"samples.":[114],"These":[115],"samples":[116],"compressed":[118],"then":[119],"delivered":[120],"via":[121],"corresponding":[127],"RUs.":[128],"RUs,":[130],"turn,":[132],"perform":[133],"decompression":[134],"IQ":[136],"modulation,":[137],"before":[138],"broadcasting":[139],"their":[140],"signals":[142],"We":[146,226,242],"focus":[147],"on":[148],"joint":[150],"design":[151],"linear":[154],"precoders,":[155],"quantizers,":[156],"capacity":[158,188],"links,":[163],"time":[167],"allocation":[168],"spectrum,":[172],"order":[174,219],"maximize":[176],"weighted":[178],"sum-rate":[179],"users,":[182],"subject":[183],"power":[185],"constraints":[186],"limitations":[189],"hybrid":[192,249],"network.":[194],"resulting":[196],"problem":[197],"nonconvex":[199],"difficult":[201],"handle.":[203],"Therefore,":[204],"we":[205],"propose":[206],"computationally-tractable":[208],"algorithm":[209,237],"line":[212],"search":[213],"alternating":[215],"convex":[216],"optimization":[217],"obtain":[221],"high-quality":[223],"suboptimal":[224],"solution.":[225],"provide":[227],"numerical":[228],"examples":[229],"demonstrate":[231],"performance":[233,246],"proposed":[236],"under":[238],"weather":[240,259],"conditions.":[241,260],"show":[244],"gain":[247],"RF/FSO":[250],"fronthaul,":[251,256],"as":[252],"compared":[253],"FSO-only":[255],"during":[257],"unfavorable":[258]},"counts_by_year":[{"year":2025,"cited_by_count":1},{"year":2021,"cited_by_count":1},{"year":2020,"cited_by_count":1},{"year":2019,"cited_by_count":2}],"updated_date":"2026-07-14T23:27:15.235271","created_date":"2025-10-10T00:00:00"}
