Method for exchanging and managing routing information between nodes in communication system where different kinds of networks interwork

PURPOSE: A method for exchanging and managing routing information between nodes in a heterogeneous network interworking communication system is provided to construct a routing table through routing information obtained from an operation and management system when a node is initialized, to modify routing tables through a periodic exchange of routing information between nodes, and to revise routing tables using modified routing table information provided from operation and management systems. CONSTITUTION: When a node is initialized, the node registers its own node information, such as a system identifier, a network identifier, provider service identifiers, etc(401). The node configures the maximum available channel value for each provider service identifier and sets the number of allocated channels to '0'(402). If the configuration of node information is completed, the node transmits a routing table request message to an operation and management system, receives a routing table response message, and constructs a routing table(403,404). The node creates a routing information transmitting process in order to broadcast a routing information response message periodically(405). Then the node creates a routing information receiving process to receive and process a routing information response message received from each node(406). Finally the node creates a routing table management process that receives a message from the operation and management system and manages the routing table(407).