Patent ID: 7760644
Filing Date: 2010-07-20
Classification: H04L

Abstract:
1. An IP router comprising: a processor for utilizing a resource reservation protocol to reserve resources for an emergency traffic flow so the emergency traffic flow can be admitted without terminating an existing low priority traffic flow by facilitating the following: receiving, from a sender, a reservation request for the low priority traffic flow, wherein said reservation request includes: a QoS message which indicates desired resources that are needed to have a desired QoS for the low priority traffic flow and also indicates reduced resources that are needed to have a minimum acceptable QoS for the low priority traffic flow; reserving the desired resources for the low priority traffic flow; admitting the low priority traffic flow using the desired resources associated with the desired QoS; receiving, from said sender, an emergency reservation request for the emergency traffic flow; reducing resources for the low priority traffic flow from the desired QoS to the minimum acceptable QoS if there are not enough resources to support the emergency traffic flow; sending, to said sender, a notification message indicating that the resources have been reduced to the minimum acceptable QoS for the low priority traffic flow; admitting the low priority traffic flow using the reduced resources associated with the minimum acceptable QoS; and admitting the emergency traffic flow.