Qualities of Service The TDES Quality of Service parameters are listed in the following table. Table 1 : Quality of Services Parameters QoS Value Unit Definition Calculation Parameter Availability 0.999 The probability that a MTBF/(MTBF + system or constituent MDT) may be operational during any randomly selected instant of time. (Definition from NAS-RD-2012) Data Latency 1 second seconds Time interval from the time Continuous (mean) an input message is received measurement and 5 and a corresponding seconds message is published to (95th NEMS. percentile) Note: Some messages do not result in a corresponding published message, however some of the data in that message may be utilized in a subsequent published message. Reconstitute 2 Minutes Time interval from the time Continuous Response a reconstitution request measurement Time message is received and when a reconstitution complete message is sent NEMS 3 Minutes Maximum time interval Continuous connection from the time a measurement Time failure to NEMS occurs to the time that the STDDS has reconnected to NEMS. Service Policies No specific service policies are applied to the STDDS TDES.
Qualities of Service The TDES Quality of Service parameters are listed in the following table. Table 1 : Quality of Services Parameters QoS Parameter Value Unit Definition Calculation Availability 0.999 The probability that a system or constituent may be operational during any randomly selected instant of time. (Definition from NAS-RD-2012) MTBF/(MTBF + MDT) Data Latency 1 second (mean) and 5 seconds (95th percentile) seconds Time interval from the time an input message is received and a corresponding message is published to NEMS. Note: Some messages do not result in a corresponding published message, however some of the data in that message may be utilized in a subsequent published message. Continuous measurement Reconstitute Response Time 2 Minutes Time interval from the time a reconstitution request message is received and when a reconstitution complete message is sent Continuous measurement NEMS Time 3 Minutes Maximum time interval from the time a connection failure to NEMS occurs to the time that the STDDS has reconnected to NEMS. Continuous measurement Service Policies No specific service policies are applied to the STDDS TDES.
NAS-JMSDD-4307-005%20TDES%20JMSDD%20Rev%20B_1.docx