Throughput and Delay Scaling of General Cognitive Networks 6/47 LIntroduction LBackgrounds Related Previous Works Sang-Woon Jeon et al.,submitted to TIT [14] Study two overlapping static ad hoc networks. Preservation regions to protect primary networks. Almost all secondary users could achieve the same throughput scaling as standalone networks. Changchuan Yin et al.,TON,2011 [15] Two overlapping static ad hoc networks. Both networks can achieve the same delay-throughput tradeoff as the optimal one for standalone networks. Cheng Wang et al.,MASS,2009 [18] Investigate multicast capacity in cognitive networks. Identify numerous sub-regimes,and in most cases multicast capacity is the same as or close to that in standalone networks. 4口4·4E，4色空1=Throughput and Delay Scaling of General Cognitive Networks 6 / 47 Introduction Backgrounds Related Previous Works I Sang-Woon Jeon et al., submitted to TIT [14] I Study two overlapping static ad hoc networks. I Preservation regions to protect primary networks. I Almost all secondary users could achieve the same throughput scaling as standalone networks. I Changchuan Yin et al., TON, 2011 [15] I Two overlapping static ad hoc networks. I Both networks can achieve the same delay-throughput tradeoff as the optimal one for standalone networks. I Cheng Wang et al., MASS, 2009 [18] I Investigate multicast capacity in cognitive networks. I Identify numerous sub-regimes, and in most cases multicast capacity is the same as or close to that in standalone networks