Distributed processing method for checking status of processor in electronic switching system
First Claim
1. A distributed processing method for checking a status of each unit processor in an electronic switching system having a maintenance processor for controlling operation of a plurality of unit processors within said electronic switching system, said method comprising the steps of:
- interconnecting all unit processors in a dual link chain structure for mutual communications with adjacently situated and interconnected unit processors;
checking a status of a designated one of said unit processors interconnected in said dual link chain structure by a mutual status check from said adjacently situated and interconnected unit processors; and
notifying an abnormal status of said designated unit processor to said maintenance processor, when said designated unit processor exhibits an abnormal status.
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Abstract
An electronic switching system having a plurality of processors connected to an internal switching network in a chain structure of a linked list form and a maintenance processor for checking status of each individual processor connected to the internal switching network. The status of the processors is checked through a mutual status checking process between unit processors, and if any processor contains any abnormality, such abnormal status of the processor is notified to the maintenance processor.
24 Citations
12 Claims
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1. A distributed processing method for checking a status of each unit processor in an electronic switching system having a maintenance processor for controlling operation of a plurality of unit processors within said electronic switching system, said method comprising the steps of:
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interconnecting all unit processors in a dual link chain structure for mutual communications with adjacently situated and interconnected unit processors; checking a status of a designated one of said unit processors interconnected in said dual link chain structure by a mutual status check from said adjacently situated and interconnected unit processors; and notifying an abnormal status of said designated unit processor to said maintenance processor, when said designated unit processor exhibits an abnormal status.
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2. A distributed processing method for checking a status of a unit processor in an electronic switching system having a maintenance processor for controlling operations of a plurality of unit processors within said electronic switching system, said method comprising the steps of:
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indexing identification values of all the unit processors and then forming a processor path table in a structure where a path of each processor is matched corresponding to each of the indexed identification values of said unit processors; periodically performing a mutual status check between unit processors adjacent to each other by using said processor path table; and controlling said processor path table according to the status check of said unit processor. - View Dependent Claims (3, 4, 5)
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6. A distributed processing method for checking a status of a unit processor in an electronic switching system having a maintenance processor for controlling a plurality of unit processors within said electronic switching system, said method comprising the steps of:
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indexing identification values of all the unit processors and then forming a processor path table in a structure where a path of each unit processor is matched corresponding to each of the indexed identification values of said unit processors; searching an adjacent processor in said processor path table to send a message requesting a check sum value of the processor path table of said adjacent processor and waiting for a response, upon a time-out period of a periodic timer for the status check of each unit processor; comparing a received check sum value with a value of the corresponding unit processor, when a response is received from said adjacent processor within a designated waiting time period; requesting a copy of a master processor path table to said maintenance processor, when said received check sum value does not correspond to the value of the corresponding unit processor, and continuing the mutual check by a message, when said adjacent processor is in a normal status; judging said adjacent processor to be in an abnormal status, when the response is not received within said designated waiting time period, and then notifying the abnormal status of said adjacent processor to said maintenance processor; performing a test for checking the status of said adjacent processor, by said maintenance processor; and changing said master processor path table and copying the changed master processor path table to all processors, when the abnormal status is checked through said test for checking the status of the processor. - View Dependent Claims (7, 8, 9, 10)
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11. An electronic switching system, comprising:
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a maintenance processor; and a plurality of unit processors interconnected in a dual link chain structure for mutual communications with corresponding indexed identification values formed in a processor path table, each unit processor being mutually checked periodically for abnormality by adjacent unit processors by using said processor path table, and reported such abnormality to said maintenance processor for exclusion from said processor path table. - View Dependent Claims (12)
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Specification