ARRANGEMENT AND METHOD RELATING TO MESSAGEING

The present invention relates to an arrangement (50) for handling control signal messageing in a distributed system comprising a number of sending nodes (10) and a number of receiving nodes (20) and implementing a control signalling communication protocol. At least a number of said sending and/or receiving nodes (10; 2) comprise message compression selection means (11) for, based on one or more criteria, selecting which messages are to be compressed, message compression means (15) for compressing selected messages, which means are (15) adapted to use the syntax of the control signalling for compression, unique identity assigning means (12 ; 2) for at least assigning messages which are to be compressed with a unique identity, and message information storing means (13; 2), in which at least some messages are sorted depending on type, under the assigned unique identity, and message recognition means (14) for recogninzing previous messages of the same type and message distinguishing means (14) for establishing the difference portion(s) between one or more previous message and a current message of the same type. The sending and/or the receiving node (10; 2) is adapted to send and/or receive the current message as a compressed message comprising only the difference portion between a selected or preferred previous message and the current message and the unique identity of said previous message.