Method for signalling connection control part message loop prevention

US5889847A · kind A · utility

Assignee

• Alcatel USA Sourcing, L.P. · US

Inventors

• Jeffrey D. Copley · Garland, US
• Thomas Hess · Frankfurt, DE

Key dates

• Filing date: Dec 23, 1996
• Grant date: Mar 30, 1999
• Expiry date: Dec 23, 2016

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04Q2213/13345
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

A method (100) for preventing message looping in a telecommunications network (70) includes the steps of receiving a UDT/S query message, determining a next destination for processing the query message and a route for delivering the query message to the next destination (102). A determination is then made as to whether the route to the next destination is XUDT/S capable (104). The UDT/S query message is converted to an XUDT/S format by inserting a hop counter (38) therein if the route is XUDT/S capable (108). The query message is then delivered to the next destination via the route (110). The hop counter (38) in the query message is then decremented at the next destination in response to receiving a message of the XUDT/S format (112). A message loop error is recognized and processed when the hop counter (38) reaches a predetermined value.