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Modeling and Optimization of Fault Self-recovery Time in DRP System

Author: LiZhiQiang
Tutor: FengDongQin
School: Zhejiang University
Course: Control Science and Engineering
Keywords: DRP system Fault recovery time Optimization Quintuple Shared time slice
CLC: TP393.04
Type: Master's thesis
Year: 2012
Downloads: 13
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Abstract


DRP (Distributed Redundant Protocol distributed redundancy protocol) system , fault recovery time measure of the reliability of the system . The parameters affecting the fault recovery time five are macro cycle ring probe shift ring probe time frame , chain probe time-shifting and chain probe time limit , collectively referred to as the \This optimization problem is how to set the value of the five parameters to obtain the smallest possible fault recovery time . In order to analyze the fault recovery time , the level of the \Packet scheduling model includes a model of fault detection and fault handling model . Failure self-healing model including the process of self-healing process and the failure of the MANET . Model based on a detailed analysis of the fault recovery time , obtained the fault recovery time range . The lower limit of the fault recovery time is a ring network processing time of link failure , and up macro cycle ring network processing time of a link failure . The upper limit of the fault recovery time for the optimization of the objective function , constraints scheduling principles and applications background . Optimization process , based on the theoretical and experimental results , changing the values ??of the five parameters , and gradually optimize the failure recovery time . In this paper, two innovative point . (1 ) in terms of detection failure , based to stagger fault detection time division method . When the ring is in a state of mesh to be group , loop detection packet detection failure ; ring network is in normal working condition , use the link detection packet detection failure . The loop detection message and link detection message according to the state division , to stagger the detection time , and provides the basis for shared time slice . (2) in the allocation of time slices , the proposed method of a time-based sheet crossing the shared time slices . Shared time slice , the ring probe time limit is no longer occupy a separate macro cycle time slice , greatly reduced the macro cycle . Reduce macro cycle , can reduce the upper limit of the fault recovery time , thereby reducing the failure recovery time . Use of the above innovations , reasonable set \

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Computer network > General issues > Communication protocols, communication protocols
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