Abstract: A method of a real time data communication via a real time data over communication network, including the steps of transmitting at least two packets from source to destination, and determining by the destination for each one of the at least two packets, time information related to a receiving time of the packet. The source applies a predefined packet length to each packet, and the destination determines, according to the determined time information and the packet length, the characteristics of a first relation between a packet length and a source to destination delay. The destination also determines a preferred mouth to ear delay according to a preferred quality rating for the data communication, and also determines an optimal packet length to be used by the source for the preferred mouth to ear delay and according to the characteristics of the first relation.

Abstract: The present invention proposes a method to control congestion in an Optical Burst Switched (OBS) network. The method consists in dropping probabilistically a data burst based on an average delay applied to a set of data bursts. Data bursts start being preventively dropped when the average delay goes beyond a pre-determined threshold.

Abstract: In a DWDM optical burst-switched network, an algorithm allows for a given volume of traffic from router A to router B and from router B to router A, expressed as &ggr;V, and for a given, hereto respectively associated loss requirements in each direction, expressed as loss requirement a symmetry &ggr;P, t o determine the value for an optimal link asymmetry &ggr;N for which the losses in both directions show an asymmetry equal to &ggr;P, or satisfy a user-defined constraint.

Abstract: The present invention discloses a method to have a real time data communication between a first user (U1) of a source (S) and a second user (U2) of a destination (DT) via a real time data over Internet Protocol communication network. The method comprises transmitting by a transmitting means (TR) of the source (S) at least two packets (T1, T2, T3, T4) to the destination (D), and determining by a receiving means (REC) of the destination (D) for each one (T2) of the at least two packets (T1, T2, T3, T4), time information (T2_t2) related to a receiving time (t2) of the packet (T2). The method further comprises applying by the transmitting means (TR) for each one (T2) of the packets (T1, T2, T3, T4) a predefined packet length (l2) out of a plurality of packet lengths (l1, l2, . . . , li) in order to be transmitted accordingly.

Abstract: The invention concerns a method to set up a voice over Internet Protocol communication between a mobile terminal (MT) and a second device (T2) whereby the voice over Internet Protocol communication comprises an air interface between the mobile terminal (MT) and a base station (BS) which is coupled via an access network and an Internet Protocol network to the second device (T2). The method comprises a step of determining, according to predefined rules and conditions, during call set-up appropriate values for a plurality of parameters which are characterizing the voice over Internet Protocol communication in order to realize a desired trade-off between a predefined user quality of said voice over Internet Protocol communication and a predefined bandwidth efficiency.