Patent ID: 7573818

Claim:
A method for controlling the congestion management and the scheduling of transmission link capacity in packet-switched telecommunications, in which method digital information is transmitted as constant or variable-length packets, identifier data is attached to the packets, on the basis of which the packets are divided into at least two different service level classes, on the basis of the service level class data, each packet is routed to one of the FIFO queues, which are one for each service level class, at least one service level class is such that identifier data is attached to the packets belonging to it, with the aid of which the packets are divided into at least two internal sub-groups in the service level class, the packets belonging to the same service level class form a flow, in which the transmission order of the packets is retained, the available capacity of outgoing link or links of a system is scheduled for the service-level-class-specific FIFO queues using a weighting-coefficient-based scheduling method, a priority-based scheduling method, or a combination of these methods, and congestion in the service-level-class-specific FIFO queues is limited by dropping or marking packets in the queue or arriving in the queue, wherein a packet-specific priority value in the priority-based scheduling and/or a weighting coefficient in the weighting-coefficient-based scheduling is defined from a joint effect of a variable q and a variable vector x and that a selection of packets within a specific service level class, to which packets dropping or marking will be applied in a congestion situation, are defined from an effect of the variable vector x, in which the variable q is defined from the service level class, to which the traffic represented by the packet in question belongs, and the variable vector x is formed of the results provided by measurement applied to the traffic flow representing the service level class being examined, said measurement results depending on temporal variation in data transmission speed of the traffic representing the traffic flow being examined and on distribution between different sub-groups of packets representing the traffic flow being examined.