Patent ID: 8159941
Filing Date: 2012-04-17
Classification: H04L

Abstract:
1. A system for implementing Quality of Service (QoS) for a Session Initiation Protocol (SIP) connection between a source node and a destination node, the system comprising: a receiver that receives data transferred between the source node and the destination node; a transmitter that transmits data between the source node and the destination node: a non-transitory computer-readable storage medium comprising a SIP policy database that stores QoS policies for nodes and applications serviced by a router, and a SIP connection database that stores information used to identify connections for the serviced nodes; a Deep Packet Inspection (DPI) processor configured to intercept a SIP control message transferred between the source node and the destination node over a control channel, extract connection information regarding the SIP connection from from at least one of layers a general processor that modifies the QoS for packets belonging to the SIP connection at one or more network nodes between the transmitter and the destination node using QoS information obtained by querying the SIP policy database using the connection information in the SIP connection database.