US Patent 10044572 Dynamic addition of network function services

A method of dynamically adding a communication service function to a communication session comprises receiving a communication during a communication session on an active connection, detecting a communication service trigger in the communication, determining a second communication service function based on the communication service trigger, sending a message to a network function virtualization (NFV) catalog, receiving a response from the NFV catalog, providing the routing information to a software defined network (SDN) controller, routing the communication from the first communication service function to the second communication service function, processing the communication with the second communication service function, and routing the communication to an output. The message to the NFV server can include an identity of the second communication service function. The SDN controller can set the session routing protocol to include the second communication service function in a communication flow for the communication session.