{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:HFTWSASLP4AR5JA5LOVQYDT7KO","short_pith_number":"pith:HFTWSASL","canonical_record":{"source":{"id":"1808.03107","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2018-08-09T12:03:53Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"e59333b0693e91b1e5bb5bfb4054ad7ee3ee302ac183363586a475c4502e1976","abstract_canon_sha256":"aa1c3117f5a07bebd87be84df97596ef7aa066ce41bf0871b161571a9ebf656d"},"schema_version":"1.0"},"canonical_sha256":"396769024b7f011ea41d5bab0c0e7f53979d660489b6c1e0ac42db6b5d15acc3","source":{"kind":"arxiv","id":"1808.03107","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1808.03107","created_at":"2026-05-18T00:03:04Z"},{"alias_kind":"arxiv_version","alias_value":"1808.03107v1","created_at":"2026-05-18T00:03:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1808.03107","created_at":"2026-05-18T00:03:04Z"},{"alias_kind":"pith_short_12","alias_value":"HFTWSASLP4AR","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_16","alias_value":"HFTWSASLP4AR5JA5","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_8","alias_value":"HFTWSASL","created_at":"2026-05-18T12:32:28Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:HFTWSASLP4AR5JA5LOVQYDT7KO","target":"record","payload":{"canonical_record":{"source":{"id":"1808.03107","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2018-08-09T12:03:53Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"e59333b0693e91b1e5bb5bfb4054ad7ee3ee302ac183363586a475c4502e1976","abstract_canon_sha256":"aa1c3117f5a07bebd87be84df97596ef7aa066ce41bf0871b161571a9ebf656d"},"schema_version":"1.0"},"canonical_sha256":"396769024b7f011ea41d5bab0c0e7f53979d660489b6c1e0ac42db6b5d15acc3","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:03:04.071883Z","signature_b64":"RwY0azcTPO7PLQiBa3WLzyohYgcUxBV3SbTtbDsMAEmzfAPek2Tr0yOtlwPKq6hiSUTOHok+JM6haw5PcS4hAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"396769024b7f011ea41d5bab0c0e7f53979d660489b6c1e0ac42db6b5d15acc3","last_reissued_at":"2026-05-18T00:03:04.071219Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:03:04.071219Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1808.03107","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":"2026-05-18T00:03:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3VGkp12EHdNB3aDv/obLvzbbNtznHOx90syFTHFvtGbl12fKq3AyLYKp6yfp5X/VhFvDLdqguYkUpMDKKLcuDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T14:35:05.003055Z"},"content_sha256":"4411d8cacb5315d8a12f62d9b6de793a92cb2ce8906e1a35a53dece0374e429c","schema_version":"1.0","event_id":"sha256:4411d8cacb5315d8a12f62d9b6de793a92cb2ce8906e1a35a53dece0374e429c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:HFTWSASLP4AR5JA5LOVQYDT7KO","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Energy Efficiency Maximization for C-RANs: Discrete Monotonic Optimization, Penalty, and l0-Approximation Methods","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["math.IT"],"primary_cat":"cs.IT","authors_text":"Kien-Giang Nguyen, Le-Nam Tran, Markku Juntti, Quang-Doanh Vu","submitted_at":"2018-08-09T12:03:53Z","abstract_excerpt":"We study downlink of multiantenna cloud radio access networks (C-RANs) with finite-capacity fronthaul links. The aim is to propose joint designs of beamforming and remote radio head (RRH)-user association, subject to constraints on users' quality-of-service, limited capacity of fronthaul links and transmit power, to maximize the system energy efficiency. To cope with the limited-capacity fronthaul we consider the problem of RRH-user association to select a subset of users that can be served by each RRH. Moreover, different to the conventional power consumption models, we take into account the "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1808.03107","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":"2026-05-18T00:03:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"B26gAAMkpAAGDwbZY0/b7vKzj18+6gFmFnD7a1MfEH0i9xpjuSrVDz4TBhPMGXQz0MWhj6cC6bo8L1ddU7VIAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T14:35:05.003422Z"},"content_sha256":"36e9d49f38de0428d1c4b2f6134828cafe6ef5323816e3fcb34b188ef0bdfef3","schema_version":"1.0","event_id":"sha256:36e9d49f38de0428d1c4b2f6134828cafe6ef5323816e3fcb34b188ef0bdfef3"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HFTWSASLP4AR5JA5LOVQYDT7KO/bundle.json","state_url":"https://pith.science/pith/HFTWSASLP4AR5JA5LOVQYDT7KO/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HFTWSASLP4AR5JA5LOVQYDT7KO/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":"2026-06-09T14:35:05Z","links":{"resolver":"https://pith.science/pith/HFTWSASLP4AR5JA5LOVQYDT7KO","bundle":"https://pith.science/pith/HFTWSASLP4AR5JA5LOVQYDT7KO/bundle.json","state":"https://pith.science/pith/HFTWSASLP4AR5JA5LOVQYDT7KO/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HFTWSASLP4AR5JA5LOVQYDT7KO/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:HFTWSASLP4AR5JA5LOVQYDT7KO","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":"aa1c3117f5a07bebd87be84df97596ef7aa066ce41bf0871b161571a9ebf656d","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2018-08-09T12:03:53Z","title_canon_sha256":"e59333b0693e91b1e5bb5bfb4054ad7ee3ee302ac183363586a475c4502e1976"},"schema_version":"1.0","source":{"id":"1808.03107","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1808.03107","created_at":"2026-05-18T00:03:04Z"},{"alias_kind":"arxiv_version","alias_value":"1808.03107v1","created_at":"2026-05-18T00:03:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1808.03107","created_at":"2026-05-18T00:03:04Z"},{"alias_kind":"pith_short_12","alias_value":"HFTWSASLP4AR","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_16","alias_value":"HFTWSASLP4AR5JA5","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_8","alias_value":"HFTWSASL","created_at":"2026-05-18T12:32:28Z"}],"graph_snapshots":[{"event_id":"sha256:36e9d49f38de0428d1c4b2f6134828cafe6ef5323816e3fcb34b188ef0bdfef3","target":"graph","created_at":"2026-05-18T00:03:04Z","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 study downlink of multiantenna cloud radio access networks (C-RANs) with finite-capacity fronthaul links. The aim is to propose joint designs of beamforming and remote radio head (RRH)-user association, subject to constraints on users' quality-of-service, limited capacity of fronthaul links and transmit power, to maximize the system energy efficiency. To cope with the limited-capacity fronthaul we consider the problem of RRH-user association to select a subset of users that can be served by each RRH. Moreover, different to the conventional power consumption models, we take into account the ","authors_text":"Kien-Giang Nguyen, Le-Nam Tran, Markku Juntti, Quang-Doanh Vu","cross_cats":["math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2018-08-09T12:03:53Z","title":"Energy Efficiency Maximization for C-RANs: Discrete Monotonic Optimization, Penalty, and l0-Approximation Methods"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1808.03107","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":"sha256:4411d8cacb5315d8a12f62d9b6de793a92cb2ce8906e1a35a53dece0374e429c","target":"record","created_at":"2026-05-18T00:03:04Z","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":"aa1c3117f5a07bebd87be84df97596ef7aa066ce41bf0871b161571a9ebf656d","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2018-08-09T12:03:53Z","title_canon_sha256":"e59333b0693e91b1e5bb5bfb4054ad7ee3ee302ac183363586a475c4502e1976"},"schema_version":"1.0","source":{"id":"1808.03107","kind":"arxiv","version":1}},"canonical_sha256":"396769024b7f011ea41d5bab0c0e7f53979d660489b6c1e0ac42db6b5d15acc3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"396769024b7f011ea41d5bab0c0e7f53979d660489b6c1e0ac42db6b5d15acc3","first_computed_at":"2026-05-18T00:03:04.071219Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:03:04.071219Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"RwY0azcTPO7PLQiBa3WLzyohYgcUxBV3SbTtbDsMAEmzfAPek2Tr0yOtlwPKq6hiSUTOHok+JM6haw5PcS4hAg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:03:04.071883Z","signed_message":"canonical_sha256_bytes"},"source_id":"1808.03107","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4411d8cacb5315d8a12f62d9b6de793a92cb2ce8906e1a35a53dece0374e429c","sha256:36e9d49f38de0428d1c4b2f6134828cafe6ef5323816e3fcb34b188ef0bdfef3"],"state_sha256":"40690935e94de9174084814b0ea527973274404952a490395c0393c505b9ad6d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fjAnNn8g3KReLrCICG5yVGvzS+07a+yd9sg51Y7c+F+eNkzePpkPaFjfbRJZzhmE7aiQVs1nvN3larx/KmhiCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-09T14:35:05.005352Z","bundle_sha256":"c190ab19909d799d6cc0f30bfc6ba2507366934b6120b361879eefaa7b8babba"}}