UPGRADABLE COMMUNICATION SYSTEM AND UPGRADING METHOD OF COMMUNICATION SYSTEM

摘要

An upgradable communication system and upgrading method of communication system make the time of interrupting services of the whole system level to be zero in the upgrading procedure of the communication system and satisfy the requirement of highly reliable system. The system includes multiple service units, switch subsystem and interface subsystem, and further includes a first system control center for dynamically deleting the control on all service units one by one and degrading itself to be a standby system control center finally when said communication system is being upgraded; a second system control center for upgrading itself to be a new system control center when said communication system is being upgraded, and sharing switch and interface resources with said first system control center by adding new links or routes through said switch and interface subsystem, and dynamically adding the control on said service units one by one and upgrading itself to be a primary system control center finally when said first system control center dynamically is deleting the control on service units one by one.