{"id":{"repo_id":"washington","oai_identifier":"oai:digital.lib.washington.edu:1773/47061"},"canonical_url":"https://search.dev.ndltd.org/etd/washington/oai:digital.lib.washington.edu:1773/47061","repository":{"repo_id":"washington","name":"University of Washington","base_url":"https://digital.lib.washington.edu/server/oai/request"},"display":{"title":"WideScatter:Toward Wide Area Battery-Free Wireless Sensor Networks","abstract":"The vision of ubiquitous battery-free sensing has run into the practical limitations of wireless communication networks. To address this, we design the first wide-area and scalable backscatter network with multiple receivers(RX) and transmitters(TX) base units to communicate with battery-free sensor nodes. Our system circumvents the inherent limitations of backscatter systems - including the limited coverage area, frequency-dependent operability, and sensor node limitations in handling network tasks- by introducing several coordination techniques between the base units starting from a single RX-TX pair to networks with many RX and TX units. We build low-cost RX and TX base units and battery-free sensor nodes with multiple sensing modalities and evaluate the performance of the WideScatter system in various deployments. Our evaluation shows that we can successfully communicate with battery-free sensor nodes across 23400 ft2 of a two-floor educational complex using 5 RX and 20 TXunits, costing $569. Also, we show that the aggregated throughput of the backscatter network increases linearly as the number of RX units and the network coverage grows.","abstract_html":"The vision of ubiquitous battery-free sensing has run into the practical limitations of wireless communication networks. To address this, we design the first wide-area and scalable backscatter network with multiple receivers(RX) and transmitters(TX) base units to communicate with battery-free sensor nodes. Our system circumvents the inherent limitations of backscatter systems - including the limited coverage area, frequency-dependent operability, and sensor node limitations in handling network tasks- by introducing several coordination techniques between the base units starting from a single RX-TX pair to networks with many RX and TX units. We build low-cost RX and TX base units and battery-free sensor nodes with multiple sensing modalities and evaluate the performance of the WideScatter system in various deployments. Our evaluation shows that we can successfully communicate with battery-free sensor nodes across 23400 ft2 of a two-floor educational complex using 5 RX and 20 TXunits, costing $569. Also, we show that the aggregated throughput of the backscatter network increases linearly as the number of RX units and the network coverage grows.","abstract_has_math":false,"creators":["Saffari, Ali"],"institution":null,"degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":["Smith, Joshua"],"committee_chairs":[],"committee_members":[],"year":2021,"date_issued":"2021-07-07","date_published":"2021-07-07","updated_at":"2026-07-24T05:58:10Z","subjects":["Electrical engineering","Computer engineering","Computer science"],"languages":["en_US"],"rights":["none"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/1773/47061","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Smith, Joshua"]},{"key":"dc:creator","label":"Author","values":["Saffari, Ali"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2021-07-07T20:01:49Z"]},{"key":"dc:date.issued","label":"Date","values":["2021-07-07"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Electrical engineering","Computer engineering","Computer science"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["en_US"]},{"key":"dc:rights","label":"Dc Rights","values":["none"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.other","label":"Dc Identifier Other","values":["Saffari_washington_0250O_22512.pdf"]},{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://hdl.handle.net/1773/47061"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Thesis (Master's)--University of Washington, 2021"]},{"key":"dc:description.abstract","label":"Abstract","values":["The vision of ubiquitous battery-free sensing has run into the practical limitations of wireless communication networks. To address this, we design the first wide-area and scalable backscatter network with multiple receivers(RX) and transmitters(TX) base units to communicate with battery-free sensor nodes. Our system circumvents the inherent limitations of backscatter systems - including the limited coverage area, frequency-dependent operability, and sensor node limitations in handling network tasks- by introducing several coordination techniques between the base units starting from a single RX-TX pair to networks with many RX and TX units. We build low-cost RX and TX base units and battery-free sensor nodes with multiple sensing modalities and evaluate the performance of the WideScatter system in various deployments. Our evaluation shows that we can successfully communicate with battery-free sensor nodes across 23400 ft2 of a two-floor educational complex using 5 RX and 20 TXunits, costing $569. 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Our system circumvents the inherent limitations of backscatter systems - including the limited coverage area, frequency-dependent operability, and sensor node limitations in handling network tasks- by introducing several coordination techniques between the base units starting from a single RX-TX pair to networks with many RX and TX units. We build low-cost RX and TX base units and battery-free sensor nodes with multiple sensing modalities and evaluate the performance of the WideScatter system in various deployments. Our evaluation shows that we can successfully communicate with battery-free sensor nodes across 23400 ft2 of a two-floor educational complex using 5 RX and 20 TXunits, costing $569. Also, we show that the aggregated throughput of the backscatter network increases linearly as the number of RX units and the network coverage grows."],"dc:format.mimetype":["application/pdf"],"dc:identifier.other":["Saffari_washington_0250O_22512.pdf"],"dc:identifier.uri":["http://hdl.handle.net/1773/47061"],"dc:language.iso":["en_US"],"dc:rights":["none"],"dc:subject":["Electrical engineering","Computer engineering","Computer science"],"dc:title":["WideScatter:Toward Wide Area Battery-Free Wireless Sensor Networks"],"dc:type":["Thesis"]},"updated_at":"2026-07-24T05:58:10Z"}