METHOD AND APPARATUS FOR REDUCING THE SIGNALLING BANDWIDTH LOAD BY REPORTING MEASUREMENTS IN DIFFERENTIAL MANNER IN A MULTICAST MESSAGE

摘要

A signalling method for reducing the bandwidth needed for communicating measurement values from at least a first source base station (11, 12, 13, 14) to at least a 5 first target base station (21, 22, 23, 24, 25) connected through a core base station (10) comprising the steps of - reporting at least a first measurement value from the at least first source base station (11, 12, 13, 14) to the core base station (10), - preferably sorting the measurement values in descending order, 10 - including, in the core base station (10) value information about the at least first measurement value in a multicast message, - transmitting the multicast message to the at least first target base station (21, 22, 23, 24, 25), characterized in that the value information is determined as a first difference between a maximum value and the first measurement value.