{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:PDHB4IPQCALLCPQ3FUYAM5RWTR","short_pith_number":"pith:PDHB4IPQ","canonical_record":{"source":{"id":"1501.03389","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2015-01-14T16:14:13Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"914f0d85606c391479b62b9a02eb74cd996c5fa9d2a65882e1f97765a68e17b2","abstract_canon_sha256":"e88d979a9ef331e347e1ea4032439b70c5aae5797ed177871e0157b1e3c74fe9"},"schema_version":"1.0"},"canonical_sha256":"78ce1e21f01016b13e1b2d300676369c6108cb698afed65a295da0139964e95c","source":{"kind":"arxiv","id":"1501.03389","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1501.03389","created_at":"2026-05-18T02:28:47Z"},{"alias_kind":"arxiv_version","alias_value":"1501.03389v2","created_at":"2026-05-18T02:28:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1501.03389","created_at":"2026-05-18T02:28:47Z"},{"alias_kind":"pith_short_12","alias_value":"PDHB4IPQCALL","created_at":"2026-05-18T12:29:37Z"},{"alias_kind":"pith_short_16","alias_value":"PDHB4IPQCALLCPQ3","created_at":"2026-05-18T12:29:37Z"},{"alias_kind":"pith_short_8","alias_value":"PDHB4IPQ","created_at":"2026-05-18T12:29:37Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:PDHB4IPQCALLCPQ3FUYAM5RWTR","target":"record","payload":{"canonical_record":{"source":{"id":"1501.03389","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2015-01-14T16:14:13Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"914f0d85606c391479b62b9a02eb74cd996c5fa9d2a65882e1f97765a68e17b2","abstract_canon_sha256":"e88d979a9ef331e347e1ea4032439b70c5aae5797ed177871e0157b1e3c74fe9"},"schema_version":"1.0"},"canonical_sha256":"78ce1e21f01016b13e1b2d300676369c6108cb698afed65a295da0139964e95c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:28:47.284890Z","signature_b64":"AQ29yl9W2/TvjCuhiURxl3nKvvYujagyq79P+1IEBNnBHfHAH2gFV38M9XGvUQ3WrXfKIcrcG/EOwIuCcUU8CQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"78ce1e21f01016b13e1b2d300676369c6108cb698afed65a295da0139964e95c","last_reissued_at":"2026-05-18T02:28:47.284523Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:28:47.284523Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1501.03389","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:28:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vYzyZ0IGb5CZN5RAAcNLAKBPI+AIDmnhAr8TMu0sZTGkQ/tpCRt/64aV17OuiJpYbadXbHUS0tfa9Kg5WV7CCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T15:38:24.973688Z"},"content_sha256":"0c458e8879be74e9c8ffea8f3bb4ea98900660de137ea742415f0236f2511a82","schema_version":"1.0","event_id":"sha256:0c458e8879be74e9c8ffea8f3bb4ea98900660de137ea742415f0236f2511a82"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:PDHB4IPQCALLCPQ3FUYAM5RWTR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"All-to-all Broadcast for Vehicular Networks Based on Coded Slotted ALOHA","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["math.IT"],"primary_cat":"cs.IT","authors_text":"Alexandre Graell i Amat, Fredrik Brannstrom, Mikhail Ivanov, Petar Popovski","submitted_at":"2015-01-14T16:14:13Z","abstract_excerpt":"We propose an uncoordinated all-to-all broadcast protocol for periodic messages in vehicular networks based on coded slotted ALOHA (CSA). Unlike classical CSA, each user acts as both transmitter and receiver in a half-duplex mode. As in CSA, each user transmits its packet several times. The half-duplex mode gives rise to an interesting design trade-off: the more the user repeats its packet, the higher the probability that this packet is decoded by other users, but the lower the probability for this user to decode packets from others. We compare the proposed protocol with carrier sense multiple"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1501.03389","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":""},"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":"2026-05-18T02:28:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EFoiUQjMhFJTjNLgLgpsNOHm9g/tJJGarTcZXVHkA1PyMemwAwHCB56+/tlabM2EKQmhVmHDdLn8BuXChk6OCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T15:38:24.974438Z"},"content_sha256":"507fbf9ac3bb4b0144d7620f2e9aadf10f9efc8db2bb61371c8f291ab240e290","schema_version":"1.0","event_id":"sha256:507fbf9ac3bb4b0144d7620f2e9aadf10f9efc8db2bb61371c8f291ab240e290"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/PDHB4IPQCALLCPQ3FUYAM5RWTR/bundle.json","state_url":"https://pith.science/pith/PDHB4IPQCALLCPQ3FUYAM5RWTR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/PDHB4IPQCALLCPQ3FUYAM5RWTR/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":"2026-05-26T15:38:24Z","links":{"resolver":"https://pith.science/pith/PDHB4IPQCALLCPQ3FUYAM5RWTR","bundle":"https://pith.science/pith/PDHB4IPQCALLCPQ3FUYAM5RWTR/bundle.json","state":"https://pith.science/pith/PDHB4IPQCALLCPQ3FUYAM5RWTR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/PDHB4IPQCALLCPQ3FUYAM5RWTR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:PDHB4IPQCALLCPQ3FUYAM5RWTR","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":"e88d979a9ef331e347e1ea4032439b70c5aae5797ed177871e0157b1e3c74fe9","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2015-01-14T16:14:13Z","title_canon_sha256":"914f0d85606c391479b62b9a02eb74cd996c5fa9d2a65882e1f97765a68e17b2"},"schema_version":"1.0","source":{"id":"1501.03389","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1501.03389","created_at":"2026-05-18T02:28:47Z"},{"alias_kind":"arxiv_version","alias_value":"1501.03389v2","created_at":"2026-05-18T02:28:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1501.03389","created_at":"2026-05-18T02:28:47Z"},{"alias_kind":"pith_short_12","alias_value":"PDHB4IPQCALL","created_at":"2026-05-18T12:29:37Z"},{"alias_kind":"pith_short_16","alias_value":"PDHB4IPQCALLCPQ3","created_at":"2026-05-18T12:29:37Z"},{"alias_kind":"pith_short_8","alias_value":"PDHB4IPQ","created_at":"2026-05-18T12:29:37Z"}],"graph_snapshots":[{"event_id":"sha256:507fbf9ac3bb4b0144d7620f2e9aadf10f9efc8db2bb61371c8f291ab240e290","target":"graph","created_at":"2026-05-18T02:28:47Z","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"},"paper":{"abstract_excerpt":"We propose an uncoordinated all-to-all broadcast protocol for periodic messages in vehicular networks based on coded slotted ALOHA (CSA). Unlike classical CSA, each user acts as both transmitter and receiver in a half-duplex mode. As in CSA, each user transmits its packet several times. The half-duplex mode gives rise to an interesting design trade-off: the more the user repeats its packet, the higher the probability that this packet is decoded by other users, but the lower the probability for this user to decode packets from others. We compare the proposed protocol with carrier sense multiple","authors_text":"Alexandre Graell i Amat, Fredrik Brannstrom, Mikhail Ivanov, Petar Popovski","cross_cats":["math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2015-01-14T16:14:13Z","title":"All-to-all Broadcast for Vehicular Networks Based on Coded Slotted ALOHA"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1501.03389","kind":"arxiv","version":2},"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":"sha256:0c458e8879be74e9c8ffea8f3bb4ea98900660de137ea742415f0236f2511a82","target":"record","created_at":"2026-05-18T02:28:47Z","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":"e88d979a9ef331e347e1ea4032439b70c5aae5797ed177871e0157b1e3c74fe9","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2015-01-14T16:14:13Z","title_canon_sha256":"914f0d85606c391479b62b9a02eb74cd996c5fa9d2a65882e1f97765a68e17b2"},"schema_version":"1.0","source":{"id":"1501.03389","kind":"arxiv","version":2}},"canonical_sha256":"78ce1e21f01016b13e1b2d300676369c6108cb698afed65a295da0139964e95c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"78ce1e21f01016b13e1b2d300676369c6108cb698afed65a295da0139964e95c","first_computed_at":"2026-05-18T02:28:47.284523Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:28:47.284523Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"AQ29yl9W2/TvjCuhiURxl3nKvvYujagyq79P+1IEBNnBHfHAH2gFV38M9XGvUQ3WrXfKIcrcG/EOwIuCcUU8CQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:28:47.284890Z","signed_message":"canonical_sha256_bytes"},"source_id":"1501.03389","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0c458e8879be74e9c8ffea8f3bb4ea98900660de137ea742415f0236f2511a82","sha256:507fbf9ac3bb4b0144d7620f2e9aadf10f9efc8db2bb61371c8f291ab240e290"],"state_sha256":"ede2e4946fe2970ed6238f8608068851ea9410356d21ea763703614b6f8f01a8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1W1Og26mJr9yefpcv6XHBlSk0DW97sumWBcIoSbEsl/ZZ6wrCCRV0pRgMgsBNkFfC/c9MbKewyY4LU9Y0G47CQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T15:38:24.978155Z","bundle_sha256":"2d922652704c6e3e6e39f7123ada1422576dedaa0f24418002f51ff195dbf285"}}