{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:VWGVZZGFG2LG7XOHKK2RLV27WM","short_pith_number":"pith:VWGVZZGF","canonical_record":{"source":{"id":"1808.09928","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.NI","submitted_at":"2018-08-29T17:07:20Z","cross_cats_sorted":[],"title_canon_sha256":"0801bb194a8e6507466f564904df6d73e4cef1365241f540b8f3bfdec7c65519","abstract_canon_sha256":"c448f4c21ef8ec1f6138a40295659582b0d9d190b56b9c65f087616df784b6f0"},"schema_version":"1.0"},"canonical_sha256":"ad8d5ce4c536966fddc752b515d75fb3016de63781e9352cf67e1c611db78e3c","source":{"kind":"arxiv","id":"1808.09928","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1808.09928","created_at":"2026-05-18T00:06:53Z"},{"alias_kind":"arxiv_version","alias_value":"1808.09928v1","created_at":"2026-05-18T00:06:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1808.09928","created_at":"2026-05-18T00:06:53Z"},{"alias_kind":"pith_short_12","alias_value":"VWGVZZGFG2LG","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_16","alias_value":"VWGVZZGFG2LG7XOH","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_8","alias_value":"VWGVZZGF","created_at":"2026-05-18T12:32:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:VWGVZZGFG2LG7XOHKK2RLV27WM","target":"record","payload":{"canonical_record":{"source":{"id":"1808.09928","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.NI","submitted_at":"2018-08-29T17:07:20Z","cross_cats_sorted":[],"title_canon_sha256":"0801bb194a8e6507466f564904df6d73e4cef1365241f540b8f3bfdec7c65519","abstract_canon_sha256":"c448f4c21ef8ec1f6138a40295659582b0d9d190b56b9c65f087616df784b6f0"},"schema_version":"1.0"},"canonical_sha256":"ad8d5ce4c536966fddc752b515d75fb3016de63781e9352cf67e1c611db78e3c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:06:53.950453Z","signature_b64":"jN9PztyVnizqKkBzJ6FQi6EeiErxMfyvc2pZTKkIi9rq1Abu5CP5ySa3KqxeU2tH6vJWBHSV53pfFaP/IXf1BQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ad8d5ce4c536966fddc752b515d75fb3016de63781e9352cf67e1c611db78e3c","last_reissued_at":"2026-05-18T00:06:53.949776Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:06:53.949776Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1808.09928","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:06:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"27hNqfydYavIOF50aUbRoxWfhk4EXb4pm1O4NNebVS9mtG7cFLTkjlCs/TWoznnldnQFwoZwbV4WjmTOVNRYDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T04:44:03.884481Z"},"content_sha256":"c7b41bf3aa1ab548384cf50d24b81d1bc5743fe028b42f7b77f688d51551ba59","schema_version":"1.0","event_id":"sha256:c7b41bf3aa1ab548384cf50d24b81d1bc5743fe028b42f7b77f688d51551ba59"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:VWGVZZGFG2LG7XOHKK2RLV27WM","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A fixed-point model for semi-persistent scheduling of vehicular safety messages","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.NI","authors_text":"Ivan Vukovic, Jayanthi Rao, Randall A. Berry, Xu Wang","submitted_at":"2018-08-29T17:07:20Z","abstract_excerpt":"In this paper, we focus on the performance analysis of a semi-persistent scheduling scheme for vehicular safety communications, motivated by the Mode 4 medium access control protocol in 3GPP Release 14 for Cellular-V2X. An analytical model is built and a fixed point method is used to calculate the collision probability and average delay in both fully connected and partially connected cases under the assumption of perfect PHY performance. We use Monte Carlo simulation to verify the results obtained in the analytical model. The simulation results show that our analytical model can give a good es"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1808.09928","kind":"arxiv","version":1},"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":"2026-05-18T00:06:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"53s3I3+HFsbMwbNuDnJ1K5KbyZU0vJa+UKuSDTgW8+tTx0kwuutSW+HAgtJSnJZWxzhFJ+lSvPsn7h6zmvcDDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T04:44:03.885097Z"},"content_sha256":"5a59c5124849c47caef530ea816cb32b9086f5b82f7c02906e4531128a89c9be","schema_version":"1.0","event_id":"sha256:5a59c5124849c47caef530ea816cb32b9086f5b82f7c02906e4531128a89c9be"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VWGVZZGFG2LG7XOHKK2RLV27WM/bundle.json","state_url":"https://pith.science/pith/VWGVZZGFG2LG7XOHKK2RLV27WM/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VWGVZZGFG2LG7XOHKK2RLV27WM/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":"2026-05-26T04:44:03Z","links":{"resolver":"https://pith.science/pith/VWGVZZGFG2LG7XOHKK2RLV27WM","bundle":"https://pith.science/pith/VWGVZZGFG2LG7XOHKK2RLV27WM/bundle.json","state":"https://pith.science/pith/VWGVZZGFG2LG7XOHKK2RLV27WM/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VWGVZZGFG2LG7XOHKK2RLV27WM/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:VWGVZZGFG2LG7XOHKK2RLV27WM","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":"c448f4c21ef8ec1f6138a40295659582b0d9d190b56b9c65f087616df784b6f0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.NI","submitted_at":"2018-08-29T17:07:20Z","title_canon_sha256":"0801bb194a8e6507466f564904df6d73e4cef1365241f540b8f3bfdec7c65519"},"schema_version":"1.0","source":{"id":"1808.09928","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1808.09928","created_at":"2026-05-18T00:06:53Z"},{"alias_kind":"arxiv_version","alias_value":"1808.09928v1","created_at":"2026-05-18T00:06:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1808.09928","created_at":"2026-05-18T00:06:53Z"},{"alias_kind":"pith_short_12","alias_value":"VWGVZZGFG2LG","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_16","alias_value":"VWGVZZGFG2LG7XOH","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_8","alias_value":"VWGVZZGF","created_at":"2026-05-18T12:32:59Z"}],"graph_snapshots":[{"event_id":"sha256:5a59c5124849c47caef530ea816cb32b9086f5b82f7c02906e4531128a89c9be","target":"graph","created_at":"2026-05-18T00:06:53Z","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":"In this paper, we focus on the performance analysis of a semi-persistent scheduling scheme for vehicular safety communications, motivated by the Mode 4 medium access control protocol in 3GPP Release 14 for Cellular-V2X. An analytical model is built and a fixed point method is used to calculate the collision probability and average delay in both fully connected and partially connected cases under the assumption of perfect PHY performance. We use Monte Carlo simulation to verify the results obtained in the analytical model. The simulation results show that our analytical model can give a good es","authors_text":"Ivan Vukovic, Jayanthi Rao, Randall A. Berry, Xu Wang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.NI","submitted_at":"2018-08-29T17:07:20Z","title":"A fixed-point model for semi-persistent scheduling of vehicular safety messages"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1808.09928","kind":"arxiv","version":1},"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:c7b41bf3aa1ab548384cf50d24b81d1bc5743fe028b42f7b77f688d51551ba59","target":"record","created_at":"2026-05-18T00:06:53Z","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":"c448f4c21ef8ec1f6138a40295659582b0d9d190b56b9c65f087616df784b6f0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.NI","submitted_at":"2018-08-29T17:07:20Z","title_canon_sha256":"0801bb194a8e6507466f564904df6d73e4cef1365241f540b8f3bfdec7c65519"},"schema_version":"1.0","source":{"id":"1808.09928","kind":"arxiv","version":1}},"canonical_sha256":"ad8d5ce4c536966fddc752b515d75fb3016de63781e9352cf67e1c611db78e3c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ad8d5ce4c536966fddc752b515d75fb3016de63781e9352cf67e1c611db78e3c","first_computed_at":"2026-05-18T00:06:53.949776Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:06:53.949776Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"jN9PztyVnizqKkBzJ6FQi6EeiErxMfyvc2pZTKkIi9rq1Abu5CP5ySa3KqxeU2tH6vJWBHSV53pfFaP/IXf1BQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:06:53.950453Z","signed_message":"canonical_sha256_bytes"},"source_id":"1808.09928","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c7b41bf3aa1ab548384cf50d24b81d1bc5743fe028b42f7b77f688d51551ba59","sha256:5a59c5124849c47caef530ea816cb32b9086f5b82f7c02906e4531128a89c9be"],"state_sha256":"7f3b682b44dfbc001c8ff49c99b1179d6acb7c7845a22f9a99b3dafc9b73497e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ir9Splp9/zngY9/aiJJwGh18NySHPnW/wwaqvp3FK3sxCgR6tE+T58oKodGV5ghn2jF/rj2RbuXLY43kv9YbCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T04:44:03.889539Z","bundle_sha256":"e65bafa91f6edbad81929f92efe567064fb32a695aed607a944addfb4d064cb1"}}