ABSTRACT
As communication on the move has become popular, research interest in wireless network technologies has increased with the goal of providing efcient and reliable communication over wireless. While the data trafc exchanged over the wireless medium is expected to grow in future, the limitation of the available electromagnetic spectrum is a challenge. Cognitive radio technology (CRT) tries to overcome this challenge. This chapter discusses the signicance and applications of CRT in mobile ad hoc networks (MANETs) and wireless sensor networks (WSNs). The issues and challenges of using CRT in ad hoc and sensor
CONTENTS
13.1 Introduction ........................................................................................................................ 245 13.2 Introduction to CRT ........................................................................................................... 246 13.3 Signicance of CRT in Ad Hoc and Sensor Networks ................................................. 246 13.4 Challenges and Open Research Issues in Implementation of CRT in MANETs
and WSNs ............................................................................................................................ 248 13.4.1 Duration of Spectrum Sensing ............................................................................ 249 13.4.2 Energy Efciency ................................................................................................... 249 13.4.3 Operating Frequency Aware Spectrum Sharing............................................... 249 13.4.4 Location Awareness ...............................................................................................250 13.4.5 Recongurability ...................................................................................................250
