{
  "categories": {
    "Registration": [
      {
        "pattern": "RegistrationFailure|UeRegistrationFailed|N1.*[Rr]egistration.*[Ff]ail",
        "nf": "AMF",
        "severity": "critical",
        "description": "UE registration failure",
        "remediation": "Check AMF logs for NGAP errors; verify UE credentials and NRF registration."
      },
      {
        "pattern": "N2SetupFail|NgapSetupFail|N2.*[Tt]imeout|NgapProcedure.*failed",
        "nf": "AMF",
        "severity": "critical",
        "description": "N2 interface setup failure",
        "remediation": "Verify gNB connectivity to AMF; check SCTP transport and NGAP PLMN config."
      },
      {
        "pattern": "InitialContextSetupFail|UeContextRelease.*[Aa]bnormal",
        "nf": "AMF",
        "severity": "warning",
        "description": "UE context setup failure",
        "remediation": "Review AMF-SMF N11 interface; check subscriber profile in UDM/UDR."
      },
      {
        "pattern": "PagingFail|UeUnreachable|UeNotFound",
        "nf": "AMF",
        "severity": "warning",
        "description": "UE paging failure",
        "remediation": "Verify UE is registered; check AMF tracking area configuration."
      }
    ],
    "Sessions": [
      {
        "pattern": "PduSessionEstablishmentReject|PduSession.*[Ff]ail|CreateSessionResponse.*[Ff]ail",
        "nf": "SMF",
        "severity": "critical",
        "description": "PDU session establishment failure",
        "remediation": "Check SMF-UPF N4 path; verify DNN/APN config and UPF N3/N9 interfaces."
      },
      {
        "pattern": "N4Session.*[Ff]ail|PfcpSession.*[Ee]rror|N4.*[Tt]imeout|PfcpAssociation.*[Ff]ail",
        "nf": "UPF",
        "severity": "critical",
        "description": "N4/PFCP session error",
        "remediation": "Restart PFCP association between SMF and UPF; check N4 IP reachability."
      },
      {
        "pattern": "IpAllocationFail|AddressPoolExhausted|NoIpAvailable",
        "nf": "SMF",
        "severity": "critical",
        "description": "IP address pool exhausted",
        "remediation": "Expand UE IP address pool in SMF config; review active session count."
      },
      {
        "pattern": "SessionModification.*[Ff]ail|BearerModification.*[Ee]rror",
        "nf": "SMF",
        "severity": "warning",
        "description": "Session modification failure",
        "remediation": "Check PCF policy consistency; verify QoS parameters match UPF capabilities."
      }
    ],
    "Authentication": [
      {
        "pattern": "AuthenticationFailure|AuthReject|EapFailure|5g-aka.*[Ff]ail|EapAkaFailure",
        "nf": "AUSF",
        "severity": "critical",
        "description": "UE authentication failure",
        "remediation": "Verify USIM credentials match UDM subscriber data; check AUSF-UDM N12 link."
      },
      {
        "pattern": "UdmAuthReq.*[Ee]rror|SuciDeconceal.*[Ff]ail|UdmUeAuth.*[Ee]rror",
        "nf": "UDM",
        "severity": "critical",
        "description": "UDM authentication error",
        "remediation": "Check UDM-UDR N35 connectivity; verify Home Network Public Key configuration."
      },
      {
        "pattern": "AuthVectorFetch.*[Ff]ail|AusfUeAuth.*[Rr]eject|HssAuth.*[Ff]ail",
        "nf": "AUSF",
        "severity": "warning",
        "description": "Auth vector fetch failure",
        "remediation": "Review UDR data integrity for affected SUPI; check AUSF-UDM TLS certificates."
      }
    ],
    "Connectivity": [
      {
        "pattern": "NfDiscovery.*[Ff]ail|NrfRegistration.*[Ff]ail|NfDeregistration.*unexpect",
        "nf": "NRF",
        "severity": "warning",
        "description": "NF service discovery failure",
        "remediation": "Verify NRF is reachable from all NFs; check NRF registration TTL and heartbeat."
      },
      {
        "pattern": "ServiceUnavailable.*NF|HTTP.*503.*NF|NfProfile.*expired",
        "nf": "NRF",
        "severity": "warning",
        "description": "NF service unavailable",
        "remediation": "Check NF pod health and SBI listen port; review NRF subscription notifications."
      },
      {
        "pattern": "SbiRequest.*[Tt]imeout|SbiConn.*[Ff]ail|Http2.*[Ee]rror",
        "nf": "NRF",
        "severity": "warning",
        "description": "SBI interface timeout",
        "remediation": "Inspect inter-NF network MTU and TLS handshake; check load balancer config."
      }
    ],
    "Policy": [
      {
        "pattern": "PcfSmPolicy.*[Ee]rror|PolicyDecision.*[Ff]ail|SmPolicy.*[Rr]eject",
        "nf": "PCF",
        "severity": "warning",
        "description": "Policy decision failure",
        "remediation": "Review PCF policy rules and subscriber group config; check PCF-UDR N36 link."
      },
      {
        "pattern": "QosEnforce.*[Ff]ail|ChargingRule.*[Ee]rror|PccRule.*[Rr]eject",
        "nf": "PCF",
        "severity": "warning",
        "description": "QoS policy enforcement failure",
        "remediation": "Verify QoS profiles match UPF capabilities; check PCF-CHF N40 charging path."
      }
    ],
    "Security": [
      {
        "pattern": "SecurityMode.*[Ff]ail|IntegrityCheck.*[Ff]ail|NasIntegrity.*[Ee]rror",
        "nf": "AMF",
        "severity": "critical",
        "description": "NAS security mode failure",
        "remediation": "Check AMF cipher/integrity algorithm priority list matches UE capabilities."
      },
      {
        "pattern": "TlsHandshake.*[Ff]ail|Certificate.*[Ee]xpir|x509.*[Ee]rror|CertVerify.*[Ff]ail",
        "nf": "AMF",
        "severity": "critical",
        "description": "TLS/certificate error",
        "remediation": "Renew expired certificates; verify trust chain between NFs; check SBI TLS config."
      },
      {
        "pattern": "SuciProtection.*[Ff]ail|PrivacyProtection.*[Ee]rror|HomeNetworkKey.*[Ee]rror",
        "nf": "UDM",
        "severity": "warning",
        "description": "SUCI privacy protection error",
        "remediation": "Verify Home Network Public Key provisioning on UDM; check SUPI revealing config."
      }
    ]
  }
}