Method for transmitting real-time data packets in convergent networks

摘要

The invention relates to a method and a system for transmitting data packets between a terminal (1) and a network node (2) of a convergent communication network via a first channel (3) for a user service, wherein a switch to a second channel (5, 6, 7) is made if the transmission quality of the transmission decreases. The transmission is carried out in a continuous data stream, wherein a predetermined number of data packets per time unit is always present. In order to evaluate the transmission quality, the transmitted data are analyzed by an error detection unit (8) for errors and a switching unit (9) in the terminal (1) and/or in the network node (2) checks whether the number of errors at least within a transmission time window exceeds at least one predefined limit value. While maintaining the transmission of the predetermined number of data packets per time unit, the switching unit(s) (9) switch(es) to the second channel (4, 5, 7) when the at least one limit value is exceeded.

主权项

1. A method of transmitting data packets between a mobile terminal and a network node of a convergent communications network through a first channel residing in a first transmission medium using a first transmission technology and a second channel residing in a second transmission medium using a second transmission technology for a user service, the first and second transmission technologies differing in transmission mode, transmission standard, or transmission protocol, the method comprising the steps of:
establishing the first channel between the mobile terminal and the network node, establishing the second channel between the mobile terminal and the network, transmitting the data via the first channel in a continuous data stream in which a predetermined number of data packets per unit of time is always present, checking the transmitted data for different fault types by a fault detector within monitoring time windows of different time lengths each for a respective one of the different fault types in order to assess transmission quality, simultaneously checking with a switch in the mobile terminal or in the network node whether the number of faults in each of the monitoring time windows exceeds a total fault limit value of all fault types and whether the number of faults of each fault type in the respective monitoring time window separately exceeds a respective predefined limit value, and when the fault number exceeds the total fault limit value or when two or more limit values are exceeded simultaneously in the monitoring time windows, the switch, while maintaining the transmission of the predetermined number of data packets per unit of time whenever the limit value is exceeded moves the data transmission to the second channel.