上游充通大 SHANGHAI JIAO TONG UNIVERSITY Two-Dimensional Route Switching in Cognitive Radio Networks: A Game-Theoretical Framework Qingkai Liang,Xinbing Wang,Xiaohua Tian, Fan Wu,Qian Zhang
1 Two-Dimensional Route Switching in Cognitive Radio Networks: A Game-Theoretical Framework Qingkai Liang, Xinbing Wang, Xiaohua Tian, Fan Wu, Qian Zhang
Outline 上游充通大学 SHANGHAI JIAO TONG UNIVERSITY ▣Introduction ▣Network Model Complete-Information Scenario Q Incomplete-Information Scenario ▣Game Analysis ▣Conclusion 2
2 Outline ❑ Introduction ❑ Network Model ❑ Complete-Information Scenario ❑ Incomplete-Information Scenario ❑ Game Analysis ❑ Conclusion
上浒充通大￥ Background SHANGHAI JIAO TONG UNIVERSITY ▣Spectrum Scarcity >Growth of WLAN,Mobile Communications,etc. >Cisco:most mobile data are in unlicensed bands(ISM bands) Unlicensed bands are heavily-utilized Licensed bands are under-utilized Spectrum Utilization of Licensed Bands Heavy Use Heavy Use Sparse Use Medium Use Frequency (MHz) I.F.Akyildiz,W.Lee,M.Vuran,S.Mohanty,"NeXt generation/dynamic spectrum access/cognitive radio wireless networks:A survey",Computer Networks(Elsevier),2127-2159,2006 3
3 Background ❑ Spectrum Scarcity ➢ Growth of WLAN, Mobile Communications, etc. ➢ Cisco: most mobile data are in unlicensed bands (ISM bands) ➢ Unlicensed bands are heavily-utilized ➢ Licensed bands are under-utilized I. F. Akyildiz, W.Lee, M. Vuran, S. Mohanty, "NeXt generation/dynamic spectrum access/cognitive radio wireless networks: A survey", Computer Networks (Elsevier), 2127-2159, 2006. Spectrum Utilization of Licensed Bands
上浒充通大￥ Cognitive Radio Networks (CRN) SHANGHAI JIAO TONG UNIVERSITY ▣Cognitive Radio A promising solution to spectrum shortage Dynamic Spectrum Access Fixed Channel Access Dynamic Channel Access ISM Bands Licensed Bands ISM Bands Licensed Bands idle Unlicensed Users Licensed Users Unlicensed Users Licensed Users Secondary User(SU)Primary User(PU) 4
4 Cognitive Radio Networks (CRN) ❑ Cognitive Radio ➢ A promising solution to spectrum shortage ❑ Dynamic Spectrum Access ISM Bands Licensed Bands Unlicensed Users Licensed Users Fixed Channel Access 1 2 3 ISM Bands Licensed Bands Unlicensed Users Licensed Users idle Dynamic Channel Access 1 2 3 Secondary User (SU) Primary User (PU)
上洋充通大学 Cognitive Radio Networks (CRN) SHANGHAI JIAO TONG UNIVERSITY ▣Spectrum Mobility >High-priority PUs can reclaim their licensed channels at any time. >SUs must cease their transmission on the licensed channels. >Spectrum availability is dynamic(or mobile)to secondary users. Time 1 Time 2 idle idle SU PU PU 5
5 Cognitive Radio Networks (CRN) ❑ Spectrum Mobility ➢ High-priority PUs can reclaim their licensed channels at any time. ➢ SUs must cease their transmission on the licensed channels. ➢ Spectrum availability is dynamic (or mobile) to secondary users. SU PU 1 2 3 idle Time 2 SU PU 1 2 3 Time 1 idle