You should be able to use the Cadence Analog Design Environment to define design variables. You should use the Variables > Copy to Cellview command to copy them to the cellview. Then in ADS, you should be able to select Dynamic Link > Design Variables > Get Design Variables. This is discussed in this section of the documentation: http://edadocs.software.keysight.com/display/ads201401/Getting+Started+with+RFIC+Dynamic+Link#GettingStartedwithRFICDynamicLink-1104022