Signaling protocol for rerouting ATM connections in PNNI environments

A communication network comprising:

• a plurality of peer groups, each peer group including;
• a first border node switch configured to detect a rerouting event and transmit a rerouting message upon the occurrence of the rerouting event;
• a second border node switch coupled to the first border node switch via a reroutable call path and configured to return a connect message upon receiving the rerouting message;
• and
• means for connecting said first border node switch to the second border node switch via a rerouted call path upon receiving the connect message at the first border node switch, wherein the rerouting event specifies a nonpreemptive rerouting reason, and wherein the means for connecting includes means for disconnecting the first border node switch from the second border node switch after connecting the first border node switch to the second border node switch via the rerouted call path.

A communication network comprising:

• a plurality of peer groups, each peer group including:
• a first border node switch configured to detect a rerouting event and transmit a rerouting message upon the occurrence of the rerouting event;
• a second border node switch coupled to the first border node switch vial a reroutable call path and configured to return a connect message upon receiving the rerouting message;
• and
• means for connecting first border node switch to the second border node switch via a rerouted call path upon receiving the connect message at the first border node switch, wherein the rerouting event specifies a preemptive rerouting reason, and wherein the means for connecting includes means for disconnecting the first border node switch from the second border node switch, before connecting the first border node switch to the second border node switch via the rerouted call path.

A switching device comprising:

• a plurality of peer groups, each peer group including:
• a first border node switch configured to detect a rerouting event and transmit a rerouting message upon the occurrence of the rerouting event;
• a second border node switch coupled to the first border node switch via a reroutable call path and configured to return a connect message upon receiving the rerouting message;
• and
• means for connecting first border node switch to the second border node switch via a rerouted call path upon receiving the connect message at the first border node switch, wherein the rerouting event specifies a nonpreemptive rerouting reason, and wherein the means for connecting includes means for disconnecting the first border node switch from the second border node switch, after connecting the first border node switch to the second border node switch via the rerouted call path.

A switching device comprising:

• a plurality of peer groups, each peer group including:
• a first border node switch configured to detect a rerouting event and transmit a rerouting message upon the occurrence of the rerouting event;
• a second border node switch coupled to the first border node switch via a reroutable call path and configured to return a connect message upon receiving the rerouting message;
• and
• means for connecting first border node switch to the second border node switch via a rerouted call path upon receiving the connect message at the first border node switch, wherein the rerouting event specifies a preemptive rerouting reason, and wherein the means for connecting includes means for disconnecting the first border node switch from the second border node switch, before connecting the first border node switch to the second border node switch via the rerouted call path.