Method and apparatus for transmitting data packets

摘要

The invention relates to a method and apparatus for transmitting data packets in a packet stream wherein the data packets have compressed headers. Update packets containing data indicating the context used in compressing the headers, and non-update packets are transmitted. According to the invention, an irregular change of the packet stream is detected and at least one packet stream parameter is obtained. Dependent on the determined packet stream parameter, either an extended update packet or an extended non-update packet is transmitted where the extended packets include information about the irregular change. The invention further includes estimating the packet stream parameter and applying a safety factor.