Alcatel USA Sourcing, L.p.

Dsc Telecom L.p.

Dsc Communications Comporation

Thomas L Hess

Jeffrey D Copley

Ronald Bradley Bell

William R Minch

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

Method for signalling connection control part message loop prevention

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.

A method (100, 700, 800) for detecting and eliminating circular routed messages in a telecommunications network includes the steps of receiving a message, and determining a derived destination point code for the received message (102). The derived destination point code is then compared with an originating point code in the message (108). A circular routed message is detected if the derived destination point code is the same as the originating point code. This comparison may be disabled and instead the routing information for routing the message indicated by the derived destination code may be compared with the originating point code (706). Alternatively, the network identifiers indicated by the derived destination point code and the originating point code are compared (806).

Apparatus and method for the detection and elimination of circular

A system (10) includes a calling party (12) that initiates a call to a ported customer (14). Upon receiving the call from calling party (12), switch (16) generates a trigger indicating that ported customer (14) is now being serviced by another switch (20). Switch (16) transfers the call to a service node (22) that includes a database (28) containing routing information. Service node (22) routes the call to switch (20) now providing service to ported customer (14). Several variations of calls to ported customer (14) are described.

Growing community of inventors

Plano, TX, United States of America

Thomas L Hess