Bundling of communication capabilities for multiple subscriber identities in a cellular radio communication system

Abstract

A user equipment device for use in a cellular radio communication system, comprising a radio frequency, herein RF, front end, which is configured for RF communication with a base station node of the cellular radio communication system, a communication controller, which is configured to control operation of the RF front end wherein the communication controller is configured to establish an operative signalling connection with a first subscriber identity module, herein SIM, which comprises first subscriber identity information associated with a first subscriber identity, herein first identity to establish an operative signalling connection with a second SIM, which comprises second subscriber identity information associated with a second subscriber identity, herein second identity, that is different from the first identity upon establishing the operative signalling connection with the second SIM, to establish an instance of a protocol stack and to provide to the base station node identity-bundling capability information that is indicative of a shared communication capability provided by the user equipment device via the RF front end and associated with the first identity and with the second identity to subsequently control shared use of the RF front end and shared use of the established instance of the protocol stack in establishing, maintaining and terminating respective radio bearers associated with the first identity and with the second identity, respectively, via the base station node.