Automated control of simulcast ratios based on network traffic data provides efficient network capacity management. The signaling device may include an array of RLC components that determine the frequency of the signaling device. The short-range wireless communication device includes a control unit that dynamically sets and changes a communication rate in the communication-occupied interval and a number of slots constituting the communication-occupied interval. The mask circuit may be configured to mask at least one value among the delta value, the new value and the clock value in response to a mask value having a plurality of bits. The etch stop layer is selected from a material such that an etch chemistry used for removing the hardmask layer has selectivity against etching the etch stop layer material.