Patent ID: 7403533
Filing Date: 2008-07-22
Classification: H04L

Abstract:
1. An AAL2 (ATM (Asynchronous Transfer Mode) Adaptation Layer 2) switching apparatus in an ATM system, comprising: a cell deassembler for deassembling a payload of a received ATM cell into a CPS (Common Part Sublayer) packet, and compressing a Virtual Path Identifier (VPI) and a Virtual Channel Identifier (VCI) of the ATM header into a first Virtual Path Connection (VPC) wherein the cell deassembler reduces a number of bits in use by performing bit compression on a header of the CPS packet, and a cell assembler restores the number of bits reduced by the cell deassembler; the header converter for receiving the CPS packet from the cell deassembler and converting the first VPC into a second VPC by using a lookup table which have a number of VPCs and CIDs (Channel Identifiers) for changing the VPC; and a cell assembler for receiving the CPS packet from the header converter, assembling an ATM cell which have the CPS packet and an ATM header generated from the second VPC.