Dynamic Block-Edge Masks (BEMs) for Dynamic Spectrum Emission Masks (SEMs)

This paper explores the evolving role of transmitter spectrum masks in the emerging paradigm of service and technology neutral spectrum planning. We advocate the use of more dynamic approaches to spectrum mask generation and design. Furthermore, we advocate a role for such masks in the implementation of dynamic spectrum access networks. In this paper we distinguish between the block-edge mask (BEM) and the spectrum emission mask (SEM). A block-edge mask specifies permitted power levels over the block of spectrum of interest and its neighbouring blocks. The spectrum emission mask on the other hand describes the actual emission profile of a device. We show how advancements in technologies, especially in the area of cognitive radio and reconfigurable networks, make the notion of dynamic SEMs a reality and we argue that a more dynamic approach to BEMs opens the way for enabling technology and service neutrality in spectrum management. We present five different possible interpretations for the dynamic BEM. While recognising that the dynamic BEM will prove challenging on both a technological and regulatory front we turn to the Wireless Access Policy for Electronic Communications Services (WAPECS) framework as a solid starting point.