ABSTRACT
Information and Spectrum Sensing Measurements 339 9.4.4 Challenges in Uncertainties and Context
Awareness 340 9.4.5 Challenges in Optimization through Rewards
and Costs toward Self-Organizing CRNs 341 9.4.6 Challenges in Advanced Learning Algorithms 342 9.4.7 Challenges in RF Front-End Design 344
9.5 Conclusion 345 Acknowledgments 346 References 346 Biographical Sketches 351
Data traffic is currently growing exponentially. By 2015, the mobile traffic is expected to reach 7000 PB per month, with an increase of 92% from 2010, whereas the global IP traffic will reach 110.3 EB by 2016 [1] with devices 3 times the number of the global population. Around 65% of the mobile data are expected to be mobile video, whereas the rest are mainly web content and related data. The video stream delivered to tablets and smart handheld devices will require a minimum of 1 Mbit/s per video stream, while the mobile network operators have not been planning for this. While this problem mainly affects the wireless access networks, the core wired network can be built to support high bit rates by using fiber networks. For instance, content delivery network providers such as Akamai, Google, or own solutions (e.g., Netflix) can support technology that provides content to proxies located near the final customer; however, they cannot support the final wireless link.
