METHOD FOR CONTROLLING A COMMUNICATION NETWORK, SERVERS, SYSTEMS INCLUDING SERVERS, AND COMPUTER PROGRAMS

摘要

A method for operating a communication network includes at least two radio access networks (10-1, 10-2) in which a user equipment (12) can simultaneously be registered and, for each of the at least two radio access networks (10-1, 10-2), a serving entity (14-1, 14-2) in the control plane. The method including the steps of assigning (s16) a master role to one serving entity (14-2) and a slave role to the other serving entity (14-1) or entities; and when a serving entity (14-1) to which a slave role is assigned has to perform control plane signalling (s18), transmitting (s20), by the serving entity, a signalling message to the serving entity (14-2) to which the master role is assigned, so as to perform (s22) the control plane signalling. Servers acting as serving entities, systems including such servers, and computer programs executable on the servers are also disclosed.