Patent ID: 7706259
Filing Date: 2010-04-27
Classification: H04L

Abstract:
1. A duplex implementation method of an Advanced Telecom Computing Architecture (ATCA) system via a base interface capable of providing a duplex IPC communication path between two duplex IPC (Inter-Processor Communication) shelves and two duplex routing protocol shelves, each of the routing protocol shelves comprising the steps of: a) assigning a representative IP address to any one of two ports connected to the base interface, wherein the step a) includes the steps of: a-1) determining an active mode or standby mode of two duplex routing protocol shelves, and determining IPC paths of the two duplex routing protocol shelves; and a-2) assigning a first IP address acting as the representative IP address to a port connected to a determined IPC path of an active-mode routing protocol shelf, assigning a second IP address to the remaining ports other than the first IP address; b) performing transmission/reception of state- and synchronous-data with a counterpart routing protocol shelf using the representative IP address, performing transmission/reception state information with individual switching processors of the IPC shelves, performing, by two routing protocol shelves, transmission/reception of state- or synchronous-data, and performing, by the routing protocol shelf or the switching processor, state information at intervals of a second period, wherein the step b) includes the steps of: b-1) exchanging, by the active-mode routing protocol shelf, state and synchronous data with the standby-mode routing protocol shelf using first and third IP addresses; and b-2) exchanging, by the active-mode routing protocol shelf and a switching processor, state information with each other; c) determining whether unexpected error or link-error occurs in a port to which the representative IP address has been assigned; and d) if the port errors or the link errors are detected, assigning the representative IP address to the other port, and performing port-switching operation, wherein the step d) includes the steps of: d-1) if the active-mode routing protocol shelf is determined, changing, by the active-mode routing protocol shelf, a port where a port or link error has occurred to a second IP address, changing the remaining ports to a first IP address; and d-2) if the standby-mode routing protocol shelf is determined, changing, by the standby-mode routing protocol shelf, any one port in which a port- or link-error occurs to a fourth IP address, and changing another port to a third IP address; e) determining whether a response signal is generated from a relative routing protocol shelf during the second period, in which the step d) further includes the step of: if there is no response signal received from the relative routing protocol shelf within the second period at the step e), performing a port switching operation; f) determining, by the standby-mode routing protocol shelf, receiving a state response signal from the active-mode routing protocol shelf within a first period; and g) if the standby-mode routing protocol shelf does not receive the state response signal from the active-mode routing protocol shelf within the first period, performing, by the standby-mode routing protocol shelf, a shelf switching to acquire an active mode; h) determining the presence or absence in a hardware failure in the active-mode routing protocol shelf; and i) performing a shelf switching operation even though the hardware failure occurs in the active-mode routing protocol shelf.