US Patent 8000248 Router and method for refreshing quality of service reservation

A method and an associated router in first administrative domain of a telecommunications network wherein the first administrative domain comprises a first end point associated to a reservation for a session transiting through the router between the first end point and a second end point in a second administrative domain. The router comprises a quality of service (QoS) reservation module maintaining a refresh timer associated with the reservation. The QoS reservation module is capable of, upon expiration of the refresh timer, sending a refresh reservation message toward the second end point on behalf of the first end point and, upon reception of a refresh confirmation message to the refresh reservation message, resetting the refresh timer without forwarding the refresh confirmation message toward the first end point.