Abstract: The object of the invention is a method for emulating the two-way information flow of a real application in a system, which comprises a first network element (101) and a second network element (102), as well as a packet network (103) between said first network element and said second network element. The method comprises transmitting a set of packets from the first network element (101) through the packet network (103) to the second network element (102). At the second network element, at least part of the transmitted packets are received. In a return transmission, a packet arrived at the second network element is transmitted back to the first network element only after a selected delay from the receiving of the packet at the second network element. The object of the invention is also a system, a network element and a computer program product implementing the method.

Abstract: There is disclosed a system for monitoring a packet data flow, comprising: a data flow source element including: determining means adapted to determine a quality of service identifier for the data flow; first generating means adapted to generate an encoded value in dependence on the quality of service identifier; allocating means adapted to allocate the quality of service identifier and the encoded value to the flow label for each data packet of the data flow; and transmitting means for forwarding data packets including flow labels to a routing domain; and a routing domain interface element including: receiving means for receiving data packets from the data flow source; second generating means adapted to generate a further encoded value in dependence on the quality of service identifier in a flow label of a data packet; comparing means adapted to compare the further encoded value to the encoded value in the flow label; and routing means adapted to selectively route the data packets in dependence on the compar

Abstract: A scheduling system for IP routers is provided. A programmable scheduler for IP routers can support single stage and multistage scheduling. This allows flexible combinations of scheduling and widens dramatically the available QoS solutions to operators. With this kind of scheduling the router can be configured to support almost any known scheduling method or combination. Priority Queuing (PQ) and Deficit Round Robin (DRR) scheduling is scheduling is used according to one embodiment of the invention.

Abstract: There is disclosed a system for monitoring a packet data flow, comprising: a data flow source element including: determining means adapted to determine a quality of service identifier for the data flow; first generating means adapted to generate an encoded value in dependence on the quality of service identifier; allocating means adapted to allocate the quality of service identifier and the encoded value to the flow label for each data packet of the data flow; and transmitting means for forwarding data packets including flow labels to a routing domain; and a routing domain interface element including: receiving means for receiving data packets from the data flow source; second generating means adapted to generate a further encoded value in dependence on the quality of service identifier in a flow label of a data packet; comparing means adapted to compare the further encoded value to the encoded value in the flow label; and routing means adapted to selectively route the data packets in dependence on the compar

Abstract: A scheduling system for IP routers is provided. A programmable scheduler for IP routers can support single stage and multistage scheduling. This allows flexible combinations of scheduling and widens dramatically the available QoS solutions to operators. With this kind of scheduling the router can be configured to support almost any known scheduling method or combination. Priority Queuing (PQ) and Deficit Round Robin (DRR) scheduling is scheduling is used according to one embodiment of the invention.

Abstract: An advanced traffic shaper is provided for shaping real-time traffic in an IP-based network while simultaneously providing keep-alive bandwidth for best-effort traffic. The traffic shaper comprises a packet classifier coupled to receive an incoming packet from the network and to classify the incoming packet as one of a real-time packet and a best-effort packet; a packet discarding block coupled to perform traffic shaping of the incoming packet from the packet classifier and discard the incoming packet in accordance with traffic shaping parameters; connection queues coupled to temporary store real-time packets and best-effort packets from the packet discarding block, respectively; and a packet scheduling block coupled to send the real-time and best-effort packets from the connection queues to an outgoing device in accordance with the traffic shaping parameters.