APPARATUS AND METHOD FOR OFFERING INTERNET PROTOCOL SERVICE IN ASYNCHRONOUS TRANSFER MODE NETWORK

摘要

PURPOSE: An apparatus and a method for offering an IP(Internet Protocol) service in an ATM(Asynchronous Transfer Mode) network are provided to enable an ATM private network to receive the IP service. CONSTITUTION: A source node(10), a transit node(20) and a destination node(30) form the ATM private network. An NMS(Network Management System)(40) checks whether another device has an error via a standardized protocol. The source node(10) finds out an ATM address corresponding to a destination IP address using an internal address mapping table when the destination IP address is received from the NMS(40). PNNI(Private Network-Network Interface) blocks(14,24,34) firstly form a signaling link by a PNNI signaling operation when the source node(10), transit node(20) and destination node(30) are booted, and then form a routing channel by a PNNI routing operation. Each of ATM stacks(16,26,36) includes a physical layer part(PHY), an ATM layer part(ATM) and AAL5(ATM Adaptation Layer Type 5) layer part(AAL5).