{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:WCNYXSDOUE4CCRXB6VCM7LV472","short_pith_number":"pith:WCNYXSDO","canonical_record":{"source":{"id":"2110.05715","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2021-10-12T03:07:21Z","cross_cats_sorted":[],"title_canon_sha256":"7494e6619c79005d1d7568ee949aff4d2a4fef33411e02a3f4a108ba021db079","abstract_canon_sha256":"6feab22880d79c8701d0f8f9dd399ce747d4d1ede96b34898b5f8a513f58f463"},"schema_version":"1.0"},"canonical_sha256":"b09b8bc86ea1382146e1f544cfaebcfe92f07a991ea4c0ee6520b0bb16da1894","source":{"kind":"arxiv","id":"2110.05715","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2110.05715","created_at":"2026-07-05T04:09:15Z"},{"alias_kind":"arxiv_version","alias_value":"2110.05715v3","created_at":"2026-07-05T04:09:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2110.05715","created_at":"2026-07-05T04:09:15Z"},{"alias_kind":"pith_short_12","alias_value":"WCNYXSDOUE4C","created_at":"2026-07-05T04:09:15Z"},{"alias_kind":"pith_short_16","alias_value":"WCNYXSDOUE4CCRXB","created_at":"2026-07-05T04:09:15Z"},{"alias_kind":"pith_short_8","alias_value":"WCNYXSDO","created_at":"2026-07-05T04:09:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:WCNYXSDOUE4CCRXB6VCM7LV472","target":"record","payload":{"canonical_record":{"source":{"id":"2110.05715","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2021-10-12T03:07:21Z","cross_cats_sorted":[],"title_canon_sha256":"7494e6619c79005d1d7568ee949aff4d2a4fef33411e02a3f4a108ba021db079","abstract_canon_sha256":"6feab22880d79c8701d0f8f9dd399ce747d4d1ede96b34898b5f8a513f58f463"},"schema_version":"1.0"},"canonical_sha256":"b09b8bc86ea1382146e1f544cfaebcfe92f07a991ea4c0ee6520b0bb16da1894","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T04:09:15.712966Z","signature_b64":"JI+O/2JUU9qygDuPCHs4mSvtWsrCZJuqBBqDK5q6ycZy6sB149Mi3De4FN3F7UbKXg8GEAyDjpgFSeFzJ/R/BQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b09b8bc86ea1382146e1f544cfaebcfe92f07a991ea4c0ee6520b0bb16da1894","last_reissued_at":"2026-07-05T04:09:15.712502Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T04:09:15.712502Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2110.05715","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T04:09:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UMfkmVmrHQ3wJLLRqNDOcc4JMOOiQqCBUpqRvCtsVgfMpMTaN8LOCK5I1drvNfA1XFlHyiMpjSGacyxpX1LdCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T22:54:22.730544Z"},"content_sha256":"691c4187f5a6ce75e53e4c27cd2f41df065ce7774392f36fc928b6f6d428ee6b","schema_version":"1.0","event_id":"sha256:691c4187f5a6ce75e53e4c27cd2f41df065ce7774392f36fc928b6f6d428ee6b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:WCNYXSDOUE4CCRXB6VCM7LV472","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Joint 3-D Positioning and Power Allocation for UAV Relay Aided by Geographic Information","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"eess.SP","authors_text":"Liang Zhu, Lipeng Zhu, Pengfei Yi, Xiang-Gen Xia, Zhenyu Xiao, Zhu Han","submitted_at":"2021-10-12T03:07:21Z","abstract_excerpt":"In this paper, we study to employ geographic information to address the blockage problem of air-to-ground links between UAV and terrestrial nodes. In particular, a UAV relay is deployed to establish communication links from a ground base station to multiple ground users. To improve communication capacity, we first model the blockage effect caused by buildings according to the three-dimensional (3-D) geographic information. Then, an optimization problem is formulated to maximize the minimum capacity among users by jointly optimizing the 3-D position and power allocation of the UAV relay, under "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2110.05715","kind":"arxiv","version":3},"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/2110.05715/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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T04:09:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HWrnP0gx3H2oXLWFTHyBnPVF7lMhCVySGemredTQHtRm2gn/52CxYnWNahGKCWDN+HhF0pvzA5RUb2AoRFjCCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T22:54:22.731630Z"},"content_sha256":"3f5e959a114f233d944cdb2143eae9c8d84eb9e98223ebe6973716100685adf8","schema_version":"1.0","event_id":"sha256:3f5e959a114f233d944cdb2143eae9c8d84eb9e98223ebe6973716100685adf8"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/WCNYXSDOUE4CCRXB6VCM7LV472/bundle.json","state_url":"https://pith.science/pith/WCNYXSDOUE4CCRXB6VCM7LV472/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/WCNYXSDOUE4CCRXB6VCM7LV472/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-08-05T22:54:22Z","links":{"resolver":"https://pith.science/pith/WCNYXSDOUE4CCRXB6VCM7LV472","bundle":"https://pith.science/pith/WCNYXSDOUE4CCRXB6VCM7LV472/bundle.json","state":"https://pith.science/pith/WCNYXSDOUE4CCRXB6VCM7LV472/state.json","well_known_bundle":"https://pith.science/.well-known/pith/WCNYXSDOUE4CCRXB6VCM7LV472/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:WCNYXSDOUE4CCRXB6VCM7LV472","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"6feab22880d79c8701d0f8f9dd399ce747d4d1ede96b34898b5f8a513f58f463","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2021-10-12T03:07:21Z","title_canon_sha256":"7494e6619c79005d1d7568ee949aff4d2a4fef33411e02a3f4a108ba021db079"},"schema_version":"1.0","source":{"id":"2110.05715","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2110.05715","created_at":"2026-07-05T04:09:15Z"},{"alias_kind":"arxiv_version","alias_value":"2110.05715v3","created_at":"2026-07-05T04:09:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2110.05715","created_at":"2026-07-05T04:09:15Z"},{"alias_kind":"pith_short_12","alias_value":"WCNYXSDOUE4C","created_at":"2026-07-05T04:09:15Z"},{"alias_kind":"pith_short_16","alias_value":"WCNYXSDOUE4CCRXB","created_at":"2026-07-05T04:09:15Z"},{"alias_kind":"pith_short_8","alias_value":"WCNYXSDO","created_at":"2026-07-05T04:09:15Z"}],"graph_snapshots":[{"event_id":"sha256:3f5e959a114f233d944cdb2143eae9c8d84eb9e98223ebe6973716100685adf8","target":"graph","created_at":"2026-07-05T04:09:15Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2110.05715/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"In this paper, we study to employ geographic information to address the blockage problem of air-to-ground links between UAV and terrestrial nodes. In particular, a UAV relay is deployed to establish communication links from a ground base station to multiple ground users. To improve communication capacity, we first model the blockage effect caused by buildings according to the three-dimensional (3-D) geographic information. Then, an optimization problem is formulated to maximize the minimum capacity among users by jointly optimizing the 3-D position and power allocation of the UAV relay, under ","authors_text":"Liang Zhu, Lipeng Zhu, Pengfei Yi, Xiang-Gen Xia, Zhenyu Xiao, Zhu Han","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2021-10-12T03:07:21Z","title":"Joint 3-D Positioning and Power Allocation for UAV Relay Aided by Geographic Information"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2110.05715","kind":"arxiv","version":3},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:691c4187f5a6ce75e53e4c27cd2f41df065ce7774392f36fc928b6f6d428ee6b","target":"record","created_at":"2026-07-05T04:09:15Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"6feab22880d79c8701d0f8f9dd399ce747d4d1ede96b34898b5f8a513f58f463","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2021-10-12T03:07:21Z","title_canon_sha256":"7494e6619c79005d1d7568ee949aff4d2a4fef33411e02a3f4a108ba021db079"},"schema_version":"1.0","source":{"id":"2110.05715","kind":"arxiv","version":3}},"canonical_sha256":"b09b8bc86ea1382146e1f544cfaebcfe92f07a991ea4c0ee6520b0bb16da1894","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b09b8bc86ea1382146e1f544cfaebcfe92f07a991ea4c0ee6520b0bb16da1894","first_computed_at":"2026-07-05T04:09:15.712502Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T04:09:15.712502Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"JI+O/2JUU9qygDuPCHs4mSvtWsrCZJuqBBqDK5q6ycZy6sB149Mi3De4FN3F7UbKXg8GEAyDjpgFSeFzJ/R/BQ==","signature_status":"signed_v1","signed_at":"2026-07-05T04:09:15.712966Z","signed_message":"canonical_sha256_bytes"},"source_id":"2110.05715","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:691c4187f5a6ce75e53e4c27cd2f41df065ce7774392f36fc928b6f6d428ee6b","sha256:3f5e959a114f233d944cdb2143eae9c8d84eb9e98223ebe6973716100685adf8"],"state_sha256":"ff6220d574ef5cd9d37801c0dfc536838054290f2ac150f73677cc0adc157a68"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"s2M0MEYiCLrLHHebaF+rKgUxbARoHHp7TnONvFnicMBTFOciyXCVppSVon1QxdNPBf02rIA35sabJJKNzpKpBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-05T22:54:22.736344Z","bundle_sha256":"40841a6b0366a6913415f37100e432ca4aa64f1385cf645753b43ba600361a84"}}