The invention relates to a method and an arrangement for reducing the amount of messages sent in a communication network comprising a first communication network entity, a second communication network entity connected to said first communication network entity over a communication interface and one or more user equipments connected to said second communication network entity over a radio interface, whereby messages are sent on said interfaces using at least a first and a second protocol. General rules are provided for sending first protocol messages packed inside second protocol messages, so called “piggybacking”, and each first protocol message is provided with an instruction field defining a co-ordination of procedure steps to be taken for performing an action.