NDLI: Analysis of failure and recovery rates in a wireless telecommunications system

Content Provider	IEEE Xplore Digital Library
Author	Matz, S.M. Votta, L.G. Malkawi, M.
Copyright Year	2002
Description	Author affiliation: Motorola Inc., Arlington Heights, IL, USA (Matz, S.M.; Votta, L.G.; Malkawi, M.)
Abstract	We derive estimates of mean time to failure and mean time to recover/repair for both hardware and software in a large wireless telecommunications system, based on six months of manually recorded outage data. The observed failure and recovery distributions are not consistent with simple exponential processes. The data can be described by Weibull or two-stage hyper-exponential distributed processes. The duration distributions for scheduled and unscheduled software outages have very different characteristics. The complex distributions observed may be the composition of simple independent processes which cannot be separated in this data set due to a lack of adequately detailed information or proper characterization of outage causes. In this system we found a coverage of /spl sim/98% for autorecovery from unscheduled software failures with an autorepair fraction of /spl sim/36%.
Sponsorship	IEEE Comput. Soc. Tech. Committee on Fault-Tolerant Comput. (TCFTC) IFIP Working Group 10.4 on Dependable Comput. & Fault Tolerence DARPA LAAS-CNRS Univ. Michigan
Starting Page	687
Ending Page	693
File Size	456693
Page Count	7
File Format	PDF
ISBN	0769511015
DOI	10.1109/DSN.2002.1029014
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2002-06-23
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Failure analysis Hardware Base stations Control systems Humans Predictive models Availability Parameter estimation Particle measurements Shape
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
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9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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