Chapter 11. Network Support: The Radio Environment Map
Youping Zhao
Shared Spectrum Company, Vienna, Virginia
Bin Le
Comcast NE&TO, Philadelphia, Pennsylvania
Jeffrey H. Reed
Virginia Tech, Bradley Department of Electrical and Computer Engineering, Blacksburg, Virginia

11.1. Introduction

This chapter discusses the strategy of exploiting network support in cognitive radio (CR) systems architectures introducing the radio environment map (REM) as an innovative vehicle of providing network support to CRs. The REM is an approach that allows “knowledge” of the radio frequency (RF) signal environment, policy, historical performance, and network or node limitations to be shared throughout the region serviced by the wireless network. As shown in Sections 11.2 ...

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