{"id":"https://openalex.org/W2085877652","doi":"https://doi.org/10.1109/ipin.2013.6817885","title":"Bandwidth and storage reduction of radio maps for offline WLAN positioning","display_name":"Bandwidth and storage reduction of radio maps for offline WLAN positioning","publication_year":2013,"publication_date":"2013-10-01","ids":{"openalex":"https://openalex.org/W2085877652","doi":"https://doi.org/10.1109/ipin.2013.6817885","mag":"2085877652"},"language":"en","primary_location":{"id":"doi:10.1109/ipin.2013.6817885","is_oa":false,"landing_page_url":"https://doi.org/10.1109/ipin.2013.6817885","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"International Conference on Indoor Positioning and Indoor Navigation","raw_type":"proceedings-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/A5005333858","display_name":"Laura Wirola","orcid":null},"institutions":[{"id":"https://openalex.org/I4210133110","display_name":"Tampere University","ror":null,"country_code":"FI","type":null,"lineage":["https://openalex.org/I4210133110"]}],"countries":["FI"],"is_corresponding":false,"raw_author_name":"Laura Wirola","raw_affiliation_strings":["HERE, Finland","Tampere University of Technology, Tampere, Finland","Tampere University of Technology, , Finland"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"HERE, Finland","institution_ids":[]},{"raw_affiliation_string":"Tampere University of Technology, Tampere, Finland","institution_ids":["https://openalex.org/I4210133110"]},{"raw_affiliation_string":"Tampere University of Technology, , Finland","institution_ids":["https://openalex.org/I4210133110"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5071089340","display_name":"Lauri Wirola","orcid":"https://orcid.org/0000-0002-5461-4572"},"institutions":[{"id":"https://openalex.org/I4210133110","display_name":"Tampere University","ror":null,"country_code":"FI","type":null,"lineage":["https://openalex.org/I4210133110"]}],"countries":["FI"],"is_corresponding":false,"raw_author_name":"Lauri Wirola","raw_affiliation_strings":["HERE, Finland","Tampere University of Technology, Tampere, Finland"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"HERE, Finland","institution_ids":[]},{"raw_affiliation_string":"Tampere University of Technology, Tampere, Finland","institution_ids":["https://openalex.org/I4210133110"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5002638646","display_name":"Robert Pich\u00e9","orcid":"https://orcid.org/0000-0003-1158-6951"},"institutions":[{"id":"https://openalex.org/I4210133110","display_name":"Tampere University","ror":null,"country_code":"FI","type":null,"lineage":["https://openalex.org/I4210133110"]}],"countries":["FI"],"is_corresponding":false,"raw_author_name":"Robert Piche","raw_affiliation_strings":["Tampere University of Technology, Tampere, Finland","Tampere University of Technology, , Finland"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Tampere University of Technology, Tampere, Finland","institution_ids":["https://openalex.org/I4210133110"]},{"raw_affiliation_string":"Tampere University of Technology, , Finland","institution_ids":["https://openalex.org/I4210133110"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":[],"corresponding_institution_ids":["https://openalex.org/I4210133110"],"apc_list":null,"apc_paid":null,"fwci":0.9602,"has_fulltext":false,"cited_by_count":5,"citation_normalized_percentile":{"value":0.79454414,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":90,"max":97},"biblio":{"volume":"4","issue":null,"first_page":"1","last_page":"9"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10326","display_name":"Indoor and Outdoor Localization 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"}},"topics":[{"id":"https://openalex.org/T10326","display_name":"Indoor and Outdoor Localization 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/T10575","display_name":"Wireless Communication Networks Research","score":0.9961000084877014,"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/T11158","display_name":"Wireless Networks and Protocols","score":0.9961000084877014,"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":0.7845209836959839},{"id":"https://openalex.org/keywords/real-time-computing","display_name":"Real-time computing","score":0.5787048935890198},{"id":"https://openalex.org/keywords/remote-radio-head","display_name":"Remote radio head","score":0.5692809820175171},{"id":"https://openalex.org/keywords/bandwidth","display_name":"Bandwidth (computing)","score":0.5465173721313477},{"id":"https://openalex.org/keywords/mobile-device","display_name":"Mobile device","score":0.4658812880516052},{"id":"https://openalex.org/keywords/hash-function","display_name":"Hash function","score":0.46569690108299255},{"id":"https://openalex.org/keywords/mode","display_name":"Mode (computer interface)","score":0.44229230284690857},{"id":"https://openalex.org/keywords/reduction","display_name":"Reduction (mathematics)","score":0.42882823944091797},{"id":"https://openalex.org/keywords/mobile-telephony","display_name":"Mobile telephony","score":0.41666871309280396},{"id":"https://openalex.org/keywords/data-transmission","display_name":"Data transmission","score":0.41134363412857056},{"id":"https://openalex.org/keywords/computer-network","display_name":"Computer network","score":0.4026544988155365},{"id":"https://openalex.org/keywords/embedded-system","display_name":"Embedded system","score":0.3747929334640503},{"id":"https://openalex.org/keywords/mobile-radio","display_name":"Mobile radio","score":0.33158692717552185},{"id":"https://openalex.org/keywords/wireless","display_name":"Wireless","score":0.26313814520835876},{"id":"https://openalex.org/keywords/telecommunications","display_name":"Telecommunications","score":0.19437512755393982},{"id":"https://openalex.org/keywords/cognitive-radio","display_name":"Cognitive radio","score":0.12037667632102966}],"concepts":[{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.7845209836959839},{"id":"https://openalex.org/C79403827","wikidata":"https://www.wikidata.org/wiki/Q3988","display_name":"Real-time computing","level":1,"score":0.5787048935890198},{"id":"https://openalex.org/C101541887","wikidata":"https://www.wikidata.org/wiki/Q1555675","display_name":"Remote radio head","level":4,"score":0.5692809820175171},{"id":"https://openalex.org/C2776257435","wikidata":"https://www.wikidata.org/wiki/Q1576430","display_name":"Bandwidth (computing)","level":2,"score":0.5465173721313477},{"id":"https://openalex.org/C186967261","wikidata":"https://www.wikidata.org/wiki/Q5082128","display_name":"Mobile device","level":2,"score":0.4658812880516052},{"id":"https://openalex.org/C99138194","wikidata":"https://www.wikidata.org/wiki/Q183427","display_name":"Hash function","level":2,"score":0.46569690108299255},{"id":"https://openalex.org/C48677424","wikidata":"https://www.wikidata.org/wiki/Q6888088","display_name":"Mode (computer interface)","level":2,"score":0.44229230284690857},{"id":"https://openalex.org/C111335779","wikidata":"https://www.wikidata.org/wiki/Q3454686","display_name":"Reduction (mathematics)","level":2,"score":0.42882823944091797},{"id":"https://openalex.org/C95491727","wikidata":"https://www.wikidata.org/wiki/Q992968","display_name":"Mobile telephony","level":3,"score":0.41666871309280396},{"id":"https://openalex.org/C557945733","wikidata":"https://www.wikidata.org/wiki/Q389772","display_name":"Data transmission","level":2,"score":0.41134363412857056},{"id":"https://openalex.org/C31258907","wikidata":"https://www.wikidata.org/wiki/Q1301371","display_name":"Computer network","level":1,"score":0.4026544988155365},{"id":"https://openalex.org/C149635348","wikidata":"https://www.wikidata.org/wiki/Q193040","display_name":"Embedded system","level":1,"score":0.3747929334640503},{"id":"https://openalex.org/C2781307350","wikidata":"https://www.wikidata.org/wiki/Q6887221","display_name":"Mobile radio","level":2,"score":0.33158692717552185},{"id":"https://openalex.org/C555944384","wikidata":"https://www.wikidata.org/wiki/Q249","display_name":"Wireless","level":2,"score":0.26313814520835876},{"id":"https://openalex.org/C76155785","wikidata":"https://www.wikidata.org/wiki/Q418","display_name":"Telecommunications","level":1,"score":0.19437512755393982},{"id":"https://openalex.org/C149946192","wikidata":"https://www.wikidata.org/wiki/Q3235733","display_name":"Cognitive radio","level":3,"score":0.12037667632102966},{"id":"https://openalex.org/C38652104","wikidata":"https://www.wikidata.org/wiki/Q3510521","display_name":"Computer security","level":1,"score":0.0},{"id":"https://openalex.org/C111919701","wikidata":"https://www.wikidata.org/wiki/Q9135","display_name":"Operating system","level":1,"score":0.0},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.0},{"id":"https://openalex.org/C2524010","wikidata":"https://www.wikidata.org/wiki/Q8087","display_name":"Geometry","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/ipin.2013.6817885","is_oa":false,"landing_page_url":"https://doi.org/10.1109/ipin.2013.6817885","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"International Conference on Indoor Positioning and Indoor Navigation","raw_type":"proceedings-article"}],"best_oa_location":null,"sustainable_development_goals":[{"score":0.8799999952316284,"id":"https://metadata.un.org/sdg/7","display_name":"Affordable and clean energy"}],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":23,"referenced_works":["https://openalex.org/W41763001","https://openalex.org/W925433037","https://openalex.org/W1969999038","https://openalex.org/W1977467261","https://openalex.org/W1992050843","https://openalex.org/W1996902159","https://openalex.org/W2012910453","https://openalex.org/W2025789985","https://openalex.org/W2040433715","https://openalex.org/W2051477491","https://openalex.org/W2108126247","https://openalex.org/W2110989072","https://openalex.org/W2117668287","https://openalex.org/W2124741310","https://openalex.org/W2141080987","https://openalex.org/W2143243918","https://openalex.org/W2147348082","https://openalex.org/W2151629360","https://openalex.org/W2156597259","https://openalex.org/W2157799270","https://openalex.org/W2501648206","https://openalex.org/W6601711710","https://openalex.org/W6657056687"],"related_works":["https://openalex.org/W1964631250","https://openalex.org/W3009067413","https://openalex.org/W2157030082","https://openalex.org/W2170939602","https://openalex.org/W2155715482","https://openalex.org/W2119805762","https://openalex.org/W2115662575","https://openalex.org/W1729918523","https://openalex.org/W1911462295","https://openalex.org/W2149692385"],"abstract_inverted_index":{"Most":[0],"of":[1,51,66,73,120,136],"the":[2,15,46,52,70,74,88,98,102,118,121,134,137,143,155],"existing":[3],"mobile":[4,89],"device":[5,47],"positioning":[6,60,113],"methods":[7,157],"require":[8],"data":[9,62],"connectivity,":[10],"i.e.":[11],"they":[12],"work":[13],"in":[14,29,56,87,101,111,114],"mobile-assisted,":[16],"or":[17,40],"online":[18],"mode.":[19,42],"However,":[20],"this":[21,44,67],"consumes":[22],"energy,":[23],"induces":[24],"transmission":[25],"costs":[26],"and":[27,84,106],"results":[28],"unnecessarily":[30],"long":[31],"time-to-first-fix.":[32],"These":[33],"issues":[34],"can":[35],"be":[36,81],"alleviated":[37],"using":[38,108],"mobile-based,":[39],"offline,":[41],"In":[43],"mode":[45],"carries":[48],"a":[49,94,129],"subset":[50],"global":[53,103],"radio":[54,76,104,124,139],"map":[55,77,105,140],"memory":[57],"for":[58],"fast":[59],"without":[61],"connection.":[63],"The":[64],"challenge":[65],"approach":[68],"is":[69],"large":[71],"size":[72,119,135],"offline":[75,112,123,138],"that":[78],"needs":[79],"to":[80,96,116,131],"downloaded,":[82],"stored":[83],"updated":[85],"periodically":[86],"device.":[90],"This":[91],"paper":[92],"presents":[93],"method":[95,130],"find":[97],"significant":[99],"APs":[100],"proposes":[107],"only":[109],"those":[110],"order":[115],"compress":[117,133],"required":[122],"map.":[125],"We":[126,153],"also":[127],"propose":[128],"further":[132],"by":[141],"hashing":[142],"globally":[144],"unique":[145,150],"AP":[146],"BSSIDs":[147],"into":[148],"locally":[149],"shortened":[151],"BSSIDs.":[152],"test":[154],"proposed":[156],"with":[158],"real-world":[159],"data.":[160]},"counts_by_year":[{"year":2023,"cited_by_count":1},{"year":2016,"cited_by_count":3},{"year":2015,"cited_by_count":1}],"updated_date":"2026-06-26T08:34:08.712188","created_date":"2025-10-10T00:00:00"}