Process for transferring data packets between emulated LANs

US6137799A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Stefan Karapetkov · Munich, DE
• Ingrid Fromm · Munich, DE
• Bernhard Petri · Hersbruck, DE

Key dates

• Filing date: Dec 22, 1997
• Grant date: Oct 24, 2000
• Expiry date: Dec 22, 2017

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04L2012/5645
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

A distinction is made between unicast frames and multicast/broadcast frames for the transmission of information packets between a source LEC of a first ELAN and a destination LEC of a second ELAN. After initiation of a connection setup, unicast information packets are transmitted between source LEC and destination LEC via a wide-area ATM network upon employment of the destination ATM address. Multicast/broadcast information packets are transmitted from the source LEC to the destination LECs via a CLS wide-area network offering a connectionless service. For the transmission of the multicast/broadcast information packets, a specific LEC in every ELAN of an exemplary embodiment is coupled to the CLS network via a bridge or a router. In one exemplary embodiment, the CLS network is employed for determining a destination ATM address of a destination LEC for the unicast transmission.