DID YOU KNOW? DTIC has over 3.5 million final reports on DoD funded research, development, test, and evaluation activities available to our registered users. Click HERE
to register or log in.
Automated Performance Monitoring and Assessment for DCS Digital Systems
Final technical rept. Feb 1978-Jan 1980
GTE PRODUCTS CORP NEEDHAM HEIGHTS MA SYLVANIA SYSTEMS GROUP/EASTERN DIV
Pagination or Media Count:
As an aid evaluating technical control techniques, an emulation facility that automatically performs the status monitoring, performance assessment, and fault isolation transmission control functions as they apply to the digital Defense Communications System DCS has been developed. This emulation facility is a multicomputer system which automatically monitors and isolates faults for digital transmission equipments. The status monitoring and performance assessment functions are performed by two processors, the Adaptive Channel Estimator ACE and an LSI 1103, the composite being referred to as the CPMAS-D unit. When the software residing in the CPMAS-D unit detects a monitor point transition, it transmits the monitor point information to the CPMAS emulator, a PDP 1160 minicomputer. These messages, called exception reports, enable the CPMAS Emulator to perform its prime mission fault isolation. A unique fault isolation algorithm has been developed for test with this emulation facility. The algorithm consists of three discrete steps. First, the equipment alarms are mapped into their effect upon each transmission path link, supergroup, group, or channel. Second, the stations with the faulty equipment are located by deleting the impact of sympathetic alarms. Third, the faulty equipment is identified using the equipment alarm status. Testing of the fault isolation algorithm is enhanced by an emulated network consisting of up to 16 stations, 2048 equipments, and two nodal control areas. Monitor point simulators and T1-4000 multiplexers, which provide simulated and real time inputs to two CPMAS-D units, are also part of the emulation facility.
APPROVED FOR PUBLIC RELEASE