{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2021:33WNQY37NYGHEUDGQ4B2EF6ICS","short_pith_number":"pith:33WNQY37","schema_version":"1.0","canonical_sha256":"deecd8637f6e0c7250668703a217c814a8eaebc7aadd15cb52052f500b866942","source":{"kind":"arxiv","id":"2108.05090","version":2},"attestation_state":"computed","paper":{"title":"Ensuring Reliable Connectivity to Cellular-Connected UAVs with Up-tilted Antennas and Interference Coordination","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"eess.SP","authors_text":"Arupjyoti Bhuyan, Ismail Guvenc, Md Moin Uddin Chowdhury, Walid Saad","submitted_at":"2021-08-11T08:15:30Z","abstract_excerpt":"To integrate unmanned aerial vehicles (UAVs) in future large-scale deployments, a new wireless communication paradigm, namely, the cellular-connected UAV has recently attracted interest. However, the line-of-sight dominant air-to-ground channels along with the antenna pattern of the cellular ground base stations (GBSs) introduce critical interference issues in cellular-connected UAV communications. In particular, the complex antenna pattern and the ground reflection (GR) from the down-tilted antennas create both coverage holes and patchy coverage for the UAVs in the sky, which leads to unrelia"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"2108.05090","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2021-08-11T08:15:30Z","cross_cats_sorted":[],"title_canon_sha256":"7817d00bae5453df6031154901b1eb8f611a8763fcb916e192aae1b71991c2d1","abstract_canon_sha256":"4c7ef657e8ed5d597214585b3af90eeab8cb49cc28177e56e713a17e21f3f905"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:42:22.878534Z","signature_b64":"AYPFUuQeWAKiVV39OZu09Q6U7Ki71R1zt/u5BrdbPp4L+4W5++y1Y1cB9QoXWnu3OnoPjchlKCL69KFV69FwAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"deecd8637f6e0c7250668703a217c814a8eaebc7aadd15cb52052f500b866942","last_reissued_at":"2026-07-05T03:42:22.878087Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:42:22.878087Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Ensuring Reliable Connectivity to Cellular-Connected UAVs with Up-tilted Antennas and Interference Coordination","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"eess.SP","authors_text":"Arupjyoti Bhuyan, Ismail Guvenc, Md Moin Uddin Chowdhury, Walid Saad","submitted_at":"2021-08-11T08:15:30Z","abstract_excerpt":"To integrate unmanned aerial vehicles (UAVs) in future large-scale deployments, a new wireless communication paradigm, namely, the cellular-connected UAV has recently attracted interest. However, the line-of-sight dominant air-to-ground channels along with the antenna pattern of the cellular ground base stations (GBSs) introduce critical interference issues in cellular-connected UAV communications. In particular, the complex antenna pattern and the ground reflection (GR) from the down-tilted antennas create both coverage holes and patchy coverage for the UAVs in the sky, which leads to unrelia"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2108.05090","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2108.05090/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"aliases":[{"alias_kind":"arxiv","alias_value":"2108.05090","created_at":"2026-07-05T03:42:22.878142+00:00"},{"alias_kind":"arxiv_version","alias_value":"2108.05090v2","created_at":"2026-07-05T03:42:22.878142+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2108.05090","created_at":"2026-07-05T03:42:22.878142+00:00"},{"alias_kind":"pith_short_12","alias_value":"33WNQY37NYGH","created_at":"2026-07-05T03:42:22.878142+00:00"},{"alias_kind":"pith_short_16","alias_value":"33WNQY37NYGHEUDG","created_at":"2026-07-05T03:42:22.878142+00:00"},{"alias_kind":"pith_short_8","alias_value":"33WNQY37","created_at":"2026-07-05T03:42:22.878142+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":1,"sample":[{"citing_arxiv_id":"2502.00928","citing_title":"Mathematical Cell Deployment Optimization for Capacity and Coverage of Ground and UAV Users","ref_index":55,"is_internal_anchor":true}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/33WNQY37NYGHEUDGQ4B2EF6ICS","json":"https://pith.science/pith/33WNQY37NYGHEUDGQ4B2EF6ICS.json","graph_json":"https://pith.science/api/pith-number/33WNQY37NYGHEUDGQ4B2EF6ICS/graph.json","events_json":"https://pith.science/api/pith-number/33WNQY37NYGHEUDGQ4B2EF6ICS/events.json","paper":"https://pith.science/paper/33WNQY37"},"agent_actions":{"view_html":"https://pith.science/pith/33WNQY37NYGHEUDGQ4B2EF6ICS","download_json":"https://pith.science/pith/33WNQY37NYGHEUDGQ4B2EF6ICS.json","view_paper":"https://pith.science/paper/33WNQY37","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2108.05090&json=true","fetch_graph":"https://pith.science/api/pith-number/33WNQY37NYGHEUDGQ4B2EF6ICS/graph.json","fetch_events":"https://pith.science/api/pith-number/33WNQY37NYGHEUDGQ4B2EF6ICS/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/33WNQY37NYGHEUDGQ4B2EF6ICS/action/timestamp_anchor","attest_storage":"https://pith.science/pith/33WNQY37NYGHEUDGQ4B2EF6ICS/action/storage_attestation","attest_author":"https://pith.science/pith/33WNQY37NYGHEUDGQ4B2EF6ICS/action/author_attestation","sign_citation":"https://pith.science/pith/33WNQY37NYGHEUDGQ4B2EF6ICS/action/citation_signature","submit_replication":"https://pith.science/pith/33WNQY37NYGHEUDGQ4B2EF6ICS/action/replication_record"}},"created_at":"2026-07-05T03:42:22.878142+00:00","updated_at":"2026-07-05T03:42:22.878142+00:00"}