Abstract: A programmable switch for use in a Software Defined Network (SDN) is disclosed that supports multiple open Application Programming Interfaces (APIs) between the switch and various types of controllers, where each such API supports a different function set and possibly uses different IP protocols such as Transmission Control Protocol (TCP) and User Datagram Protocol (UDP).

Abstract: A novel technique is shown for throttling control traffic in a Software Defined Network (SDN) between a controller and network switches when the controller and/or one or more control channels are congested. In this technique, the controller's processing power and the limited control channel bandwidth are more efficiently managed by drastically cutting down the control traffic during times of congestion.

Abstract: An adaptive network-based approach for reducing congestion on certain select-group of flows within a programmable network wherein switches dynamically adjust the receive window size (rwnd) and/or the ACK pace of other TCP flows by interfering their ACK packets, those flows sharing network resources causing congestion on the select-group of flows. The TCP flow rate is reduced to make more network resources available to the group of select-flows. The system of invention further comprises a centralized controller detecting so called a ‘bad queue’ causing persistent traffic slow-down due to TCP behavior. The bad queue detection is performed by (i) monitoring switch ports' transmit and receive queues, (ii) calculating minimum packet sojourn times on queues, (iii) determining which flows to slow down to clear detected bad queues, and (iv) sending messages to certain switches to execute changes to a group of ACK packets.

Abstract: A novel technique is shown for throttling control traffic in a Software Defined Network (SDN) between a controller and network switches when the controller and/or one or more control channels are congested. In this technique, the controller's processing power and the limited control channel bandwidth are more efficiently managed by drastically cutting down the control traffic during times of congestion.

Abstract: In Vehicle-to-Infrastructure (V2I) communications, the broadcast data towards the vehicles must use the network resources efficiently while the unicast data must arrive reliably with ultra-low-latency. Furthermore, the connections must remain network-attached while vehicles move rapidly. A system/method are described through which a vehicle with a special communications module and internal computer can connect to one or more 5G vehicular network slices (VNS) with multiple Radio Access Technologies (multi-RAT) in order to efficiently communicate with local or remote transportation information databases and applications, road safety and emergency infrastructures. The infrastructure of this disclosure uses the network-slicing feature of a 5G mobile network to carve out a vehicular data and control planes specialized to offer the vehicular service only.

Abstract: An adaptive network-based approach for reducing congestion on certain select-group of flows within a programmable network wherein switches dynamically adjust the receive window size (rwnd) and/or the ACK pace of other TCP flows by interfering their ACK packets, those flows sharing network resources causing congestion on the select-group of flows. The TCP flow rate is reduced to make more network resources available to the group of select-flows. The system of invention further comprises a centralized controller detecting so called a ‘bad queue’ causing persistent traffic slow-down due to TCP behavior. The bad queue detection is performed by (i) monitoring switch ports' transmit and receive queues, (ii) calculating minimum packet sojourn times on queues, (iii) determining which flows to slow down to clear detected bad queues, and (iv) sending messages to certain switches to execute changes to a group of ACK packets.