Patent Number: 6,801,498

Title: Asynchronous transfer mode communication equipment and method for switching virtual path of same

Abstract: Asynchronous transfer mode communication equipment utilizing distributed processing to manage switching to standby virtual paths when a failure occurs in an active path, allowing an increased number of virtual paths to be reliably handled by the equipment, even in situations where multiple virtual paths simultaneously fail. Each unit controller within the ATM communication equipment has its own virtual path paired information table. When a failure occurs in a virtual path to a respective unit controller, the unit controller can immediately and independently select a standby path. This distributed processing increases the retrieval speed of standby paths and minimizes the delay to full restoration of service, avoiding the concurrent processing bottleneck that occurs in prior art designs when multiple active paths simultaneously fail and a central processor must sequentially redirect each unit controller.

Inventors: Kamiya; Satoshi (Tokyo, JP)

Assignee: NEC Corporation

International Classification: H04L 12/46 (20060101); H04L 012/26 ()

Expiration Date: 10/05/2021