Patent ID: 7742403

Claim:
Method for checking deadlock in a telecommunication network including a first activated backup connection for protecting traffic over a first intended connection calculated by a traffic engineering tool, the method comprising the following steps: Checking, by a device, a reversion blocked status of the first intended connection indicating that a reversion from the first activated backup connection to the first intended connection is not possible, by determining a not available segment by checking if resources of the first intended connection are available or not available; characterized by, in case of detecting the reversion blocked status of the first intended connection; identifying at least one activated backup connection using the not available resources of the first intended connection and identifying at least one intended connection currently protected by the at least one activated backup connection; checking a reversion blocked status of the at least one identified intended connection indicating that a reversion from the at least one activated backup connection to the at least one identified intended connection is not possible, by checking if the resources of the at least one identified intended connection are available or not available; and, in ease of detecting a reversion blocked status of the at least one identified intended connection; checking if a not available resources of the at least one identified intended connection is included in the first activated backup connection.