Limited Shared Memory Asynchronous Transfer Mode (ATM) A routing controller for implementing multicast functionality in a switch device

摘要

The present invention relates to a routing control apparatus for implementing a multicast function in a limited shared memory asynchronous transfer mode (ATM) switch apparatus, and more particularly, to a routing control apparatus for performing a multicast function when a cell is stored in a switch, (ABUFF) to provide a routing control device for implementing a multicast function in a restricted shared memory ATM switch that enables to discriminate whether to store a cell as this bit when storing a cell address in the idle address buffer (IAP) Multicast route storage means 300 for outputting multicast route information 308; An address buffer enable means 301 for externally outputting an address buffer enable signal 213 and a dormant address enable signal 212 and outputting unicast route information 310; A usage calculation value shifting means (302) for outputting a usage calculation value shift signal (307) and a flag generation enable signal (306); A highest bit storage means (303) for outputting a selected highest bit signal (311); A logical product operation means (304) for outputting a cumulative maximum bit determination signal (309); Multicast flag generating means 305 for generating and outputting a multicast flag signal 312; And a flag selection means 313 for outputting the flag signal 213 to the outside, thereby providing a multicast function with simple implementation and excellent performance.