A method of operation of a user equipment device in a cellular communication network, the cellular communication network comprising a macro node serving a cell in which the user equipment device is located and a pico node that provides a data rate and capacity extension for the cell within a corresponding pico region, the method comprising: obtaining a plurality of configuration identity values for configuration identity parameters for a corresponding plurality of configuration groups for the user equipment device, where each configuration group of the plurality of configuration groups has a corresponding configuration identity parameter and includes a one or more parameters for one of a transmission channel and a reception channel for the user equipment device, wherein obtaining the plurality of configuration identity values comprises: obtaining a physical layer cell identifier for the cell; setting the plurality of configuration identity values to the physical layer cell identifier as a default; receiving, for at least one of the configuration identity parameters, an override configuration identity value from the cellular communication network; and storing the override configuration identity value as the configuration identity value for the at least one of the configuration identity parameters; and the method further comprising, for each configuration group of the plurality of configuration groups, configuring the one or more parameters for the configuration group based on one of the plurality of configuration identity values obtained for the corresponding configuration identity parameter for the configuration group rather than the obtained physical layer cell identifier. obtaining a plurality of configuration identity values for configuration identity parameters for a corresponding plurality of configuration groups for the user equipment device, where each configuration group of the plurality of configuration groups has a corresponding configuration identity parameter and includes a one or more parameters for one of a transmission channel and a reception channel for the user equipment device, wherein obtaining the plurality of configuration identity values comprises: obtaining a physical layer cell identifier for the cell; setting the plurality of configuration identity values to the physical layer cell identifier as a default; receiving, for at least one of the configuration identity parameters, an override configuration identity value from the cellular communication network; and storing the override configuration identity value as the configuration identity value for the at least one of the configuration identity parameters; and obtaining a physical layer cell identifier for the cell; setting the plurality of configuration identity values to the physical layer cell identifier as a default; receiving, for at least one of the configuration identity parameters, an override configuration identity value from the cellular communication network; and storing the override configuration identity value as the configuration identity value for the at least one of the configuration identity parameters; and the method further comprising, for each configuration group of the plurality of configuration groups, configuring the one or more parameters for the configuration group based on one of the plurality of configuration identity values obtained for the corresponding configuration identity parameter for the configuration group rather than the obtained physical layer cell identifier.