Recommendation ITU-T K.131 (01/2022) Design methodologies for telecommunication systems applying soft error measures
Summary
History
FOREWORD
Table of Contents
Introduction
1 Scope
2 References
3 Definitions
     3.1 Terms defined elsewhere
     3.2 Terms defined in this Recommendation
4 Abbreviations and acronyms
5 Conventions
6 Basic configurations for telecommunication equipment
     6.1 Basic functional configurations (classification of function blocks regarding effect on client signal)
     6.2 Equipment configuration (components, circuit packs and unit)
     6.3 Functional configurations to be considered for countermeasures
          6.3.1 Allocation of basic function blocks in hardware
          6.3.2 Redundant configuration
          6.3.3 Initial start-up configuration
7 Reliability requirements relating to soft errors and procedure of equipment design with mitigation measures
     7.1 Reliability requirements
     7.2 Equipment development procedures to implement mitigation measures
8 Estimation of soft error impact
     8.1 Devices impacted by soft errors
          8.1.1 Characteristics of semiconductor circuits in relation to soft error rate
          8.1.2 Types of circuits implemented in semiconductor devices
          8.1.3 Soft error impact relating to SRAM usage form
     8.2 Estimation method for soft error failure rate
9 Methods for implementation of soft error measures
     9.1 Principles of mitigation measures
          9.1.1 Reduction
          9.1.2 Isolation
          9.1.3 Correction
     9.2 Soft error detection method
     9.3 Soft error correction method
     9.4 Example of soft error correction measures for setting data storage memory
     9.5 Examples of soft error correction measures for operational control memory and logic circuits
     9.6 Example of soft error measures for buffer memory
     9.7 Definition and consideration of silent failure
          9.7.1 Configuration of failure monitoring function for client signals in carrier network
          9.7.2 Relationship between silent failure and alert function reliability
          9.7.3 Notes on the design to prevent silent failure
10 Notes on application of soft error measures
     10.1 Soft error measures for a redundant configuration function block
     10.2 Design method of notification message regarding soft error measures
     10.3 Saving soft error occurrence history
     10.4 Soft error measures for initial start-up data storage memory
     10.5 Identification of physical fault failure to prevent repetition of soft error measures
     10.6 Notes on use of CPU internal memory
11 Soft error reliability evaluation methods
Annex A  Design method for notification message for soft error measures
     A.1 Notification message on execution of automatic restoration from soft error
     A.2 Notification message on execution of manual restoration from soft error
Appendix I  Trends in semiconductor device soft error tolerances
Bibliography
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