RESOURCE OPTIMIZATION FUNCTION IN A DATA AND TELECOMMUNICATIONS SYSTEM

摘要

The invention relates to a method at a telecommunications system and a data communications system which adapts resource reservation protocol for fixed networks (102) to radio networks with large variation in bandwidth and quality. At hierarchical coding, a data stream is divided into separate data streams with different priorities. By the resource reservation protocol, then resources in the fixed network (102) for the data streams are reserved. A node in the fixed network throws the data streams according to a predecided priority if the transmission capacity of the node decreases. If the transmission capacity at this node decreases, and the quality requirement of a data stream fails to be kept up, the data stream in question is thrown. After that, the node transmits a message to the nodes where the resource reservations are, towards the transmitter (105) with the following content: update the resource reservations for the data stream, i.e. keep the resource reservations which are required to transmit the data stream; use the reserved resource temporarily for other traffic; throw the data stream until different is stated.