Drx cycle configuration in dual connectivity

A User Equipment device, UE, comprising:

• a transceiver;
• at least one processor;
• and
• memory containing instructions executable by the at least one processor whereby the UE is operable to:
• obtain a first Discontinuous Reception, DRX, cycle for a Master Cell Group, MCG, of the UE for a dual connectivity mode of operation and a second DRX cycle for a Secondary Cell Group, SCG, of the UE for the dual connectivity mode of operation;
• determine at least one reference DRX cycle for the UE, each of the at least one reference DRX cycle being one of a group consisting of:
• the first DRX cycle, the second DRX cycle, a function of the first DRX cycle, a function of the second DRX cycle, and a function of both the first DRX cycle and the second DRX cycle;
• and
• perform one or more radio measurements on one or more cells based on the at least one reference DRX cycle, the one or more radio measurements being one or more inter-frequency radio measurements and/or one or more inter-Radio Access Technology, RAT, radio measurements.

A method of operation of a network node of a cellular communications network, comprising:

• determining at least one reference Discontinuous Reception, DRX, cycle for a User Equipment device, UE, for a dual connectivity mode of operation for which the UE is configured with a first DRX cycle for a Master Cell Group, MCG, of the UE for the dual connectivity mode of operation and a second DRX cycle for a Secondary Cell Group, SCG, of the UE for the dual connectivity mode of operation, each of the at least one reference DRX cycle being one of a group consisting of:
• the first DRX cycle, the second DRX cycle, a function of the first DRX cycle, a function of the second DRX cycle, and a function of both the first DRX cycle and the second DRX cycle;
• and
• configuring the UE with an indicator relating to the at least one reference DRX cycle.