6 interference management in mimo multicell

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  • 1. Interference Management in MIMO Multicell Systems with variable CSIT Giuseppe Abreu g.abreu@jacobs-university.de School of Engineering and Sciences Jacobs University BremenNovember 7, 2013

2. EvolutionGSM Application Access Latency Switching Time12 kbps 20 kbps 150 ms Few seconds3G 1 Mbps 24 kbps 50 ms 500 ms4G 10 Mbps 300 Mbps 10 ms 200 ms5G 1 Gbps 10 Gbps 1 ms 10 ms 3. ForecastMobile trac volume trend: 1000x in 10 years.Requirements 4. ForecastMobile trac volume trend: 1000x in 10 years. The Internet of ThingsRequirements 5. ForecastMobile trac volume trend: 1000x in 10 years. The Internet of Things The Internet of Things !Requirements 6. ForecastMobile trac volume trend: 1000x in 10 years. The Internet of Things The Internet of Things ! The Internet of Things !!!Requirements 7. ForecastMobile trac volume trend: 1000x in 10 years. The Internet of Things The Internet of Things ! The Internet of Things !!!Requirements Improve energy eciency 8. ForecastMobile trac volume trend: 1000x in 10 years. The Internet of Things The Internet of Things ! The Internet of Things !!!Requirements Improve energy eciency Improve QoS 9. ForecastMobile trac volume trend: 1000x in 10 years. The Internet of Things The Internet of Things ! The Internet of Things !!!Requirements Improve energy eciency Improve QoS Improve spectrum eciency 10. Past and Future Drivers of cellular system improvement 2G: 3G: 4G: 5G:Digitalization (GSM/CDMA) Spread-spectrum (WCDMA) LTE (OFDMA) ??? 11. Past and Future Drivers of cellular system improvement 2G: 3G: 4G: 5G:Digitalization (GSM/CDMA) spectrum Spread-spectrum (WCDMA) LTE (OFDMA) ??? 12. Past and Future Drivers of cellular system improvement 2G: 3G: 4G: 5G:Digitalization (GSM/CDMA) spectrum Spread-spectrum (WCDMA) spectrum again... LTE (OFDMA) ??? 13. Past and Future Drivers of cellular system improvement 2G: 3G: 4G: 5G:Digitalization (GSM/CDMA) spectrum Spread-spectrum (WCDMA) spectrum again... LTE (OFDMA) and again... ??? 14. Past and Future Drivers of cellular system improvement 2G: 3G: 4G: 5G:Digitalization (GSM/CDMA) spectrum Spread-spectrum (WCDMA) spectrum again... LTE (OFDMA) and again... granularity 15. Past and Future Drivers of cellular system improvement 2G: 3G: 4G: 5G:Digitalization (GSM/CDMA) spectrum Spread-spectrum (WCDMA) spectrum again... LTE (OFDMA) and again... granularity devices 16. Past and Future Drivers of cellular system improvement 2G: 3G: 4G: 5G:Digitalization (GSM/CDMA) spectrum Spread-spectrum (WCDMA) spectrum again... LTE (OFDMA) and again... granularity devices antennas 17. Past and Future Drivers of cellular system improvement 2G: 3G: 4G: 5G:Digitalization (GSM/CDMA) spectrum Spread-spectrum (WCDMA) spectrum again... LTE (OFDMA) and again... granularity devices antennasBottlenecked by Interference 18. Past and Future Drivers of cellular system improvement 2G: 3G: 4G: 5G:Digitalization (GSM/CDMA) spectrum Spread-spectrum (WCDMA) spectrum again... LTE (OFDMA) and again... granularity devices antennasBottlenecked by Interference Cooperation (Relaying) 19. Past and Future Drivers of cellular system improvement 2G: 3G: 4G: 5G:Digitalization (GSM/CDMA) spectrum Spread-spectrum (WCDMA) spectrum again... LTE (OFDMA) and again... granularity devices antennasBottlenecked by InterferenceCooperation (Relaying) security (?) 20. Past and Future Drivers of cellular system improvement 2G: 3G: 4G: 5G:Digitalization (GSM/CDMA) spectrum Spread-spectrum (WCDMA) spectrum again... LTE (OFDMA) and again... granularity devices antennasBottlenecked by InterferenceCooperation (Relaying) security (?) Het-Nets/Cognitive Radio 21. Past and Future Drivers of cellular system improvement 2G: 3G: 4G: 5G:Digitalization (GSM/CDMA) spectrum Spread-spectrum (WCDMA) spectrum again... LTE (OFDMA) and again... granularity devices antennasBottlenecked by InterferenceCooperation (Relaying) security (?) Het-Nets/Cognitive Radio enough (?) 22. Past and Future Drivers of cellular system improvement 2G: 3G: 4G: 5G:Digitalization (GSM/CDMA) spectrum Spread-spectrum (WCDMA) spectrum again... LTE (OFDMA) and again... granularity devices antennasBottlenecked by InterferenceCooperation (Relaying) security (?) Het-Nets/Cognitive Radio enough (?) Interference Alignment 23. Past and Future Drivers of cellular system improvement 2G: 3G: 4G: 5G:Digitalization (GSM/CDMA) spectrum Spread-spectrum (WCDMA) spectrum again... LTE (OFDMA) and again... granularity devices antennasBottlenecked by InterferenceCooperation (Relaying) security (?) Het-Nets/Cognitive Radio enough (?) Interference Alignment scalability (?) 24. Past and Future Drivers of cellular system improvement 2G: 3G: 4G: 5G:Digitalization (GSM/CDMA) spectrum Spread-spectrum (WCDMA) spectrum again... LTE (OFDMA) and again... granularity devices antennasBottlenecked by InterferenceCooperation (Relaying) security (?) Het-Nets/Cognitive Radio enough (?) Interference Alignment scalability (?) Massive MIMO 25. Past and Future Drivers of cellular system improvement 2G: 3G: 4G: 5G:Digitalization (GSM/CDMA) spectrum Spread-spectrum (WCDMA) spectrum again... LTE (OFDMA) and again... granularity devices antennasBottlenecked by InterferenceCooperation (Relaying) security (?) Het-Nets/Cognitive Radio enough (?) Interference Alignment scalability (?) Massive MIMO revolutionary, expensive (!) 26. Past and Future Drivers of cellular system improvement 2G: 3G: 4G: 5G:Digitalization (GSM/CDMA) spectrum Spread-spectrum (WCDMA) spectrum again... LTE (OFDMA) and again... granularity devices antennasBottlenecked by InterferenceCooperation (Relaying) security (?) Het-Nets/Cognitive Radio enough (?) Interference Alignment scalability (?) Massive MIMO revolutionary, expensive (!) CoMP 27. Past and Future Drivers of cellular system improvement 2G: 3G: 4G: 5G:Digitalization (GSM/CDMA) spectrum Spread-spectrum (WCDMA) spectrum again... LTE (OFDMA) and again... granularity devices antennasBottlenecked by InterferenceCooperation (Relaying) security (?) Het-Nets/Cognitive Radio enough (?) Interference Alignment scalability (?) Massive MIMO revolutionary, expensive (!) CoMP evolutionary, exible, huge background, maturing... 28. Past and Future Drivers of cellular system improvement 2G: 3G: 4G: 5G:Digitalization (GSM/CDMA) spectrum Spread-spectrum (WCDMA) spectrum again... LTE (OFDMA) and again... granularity devices antennasBottlenecked by InterferenceCooperation (Relaying) security (?) Het-Nets/Cognitive Radio enough (?) Interference Alignment scalability (?) Massive MIMO revolutionary, expensive (!) CoMP evolutionary, exible, huge background, maturing...Still lots to be done!! 29. CoMPs System ModelB coordinating BSs K users per cell One BS per cell Each BS with multiple antennas User may have multiple antennas Embedded power control Desired Signal Interference SignalInter-cell and intra-cell interference 30. Now lets get serious... 31. Dissecting CoMP Energy EciencyExample 1: Power minimization problem [Yu&Lan 2007] minimizeV {vk }subject to |vn |2 pnSINRk k ,givenhkKTX : xN 1 =sk vk k=1SINRk =RX : yk = hk x + zk|hk vk |2 2 2 j=k |hk vk | + 32. Dissecting CoMP Energy EciencyExample 1: Power minimization problem [Yu&Lan 2007] minimizeV {vk }subject to |vn |2 pnSINRk k ,givenhkKTX : xN 1 =sk vk k=1SINRk = N=B b=1RX : yk = hk x + zk|hk vk |2 2 2 j=k |hk vk | + Ntb TX antennas MISO 33. Dissecting CoMP Energy EciencyExample 1: Power minimization problem [Yu&Lan 2007] minimizeV {vk }subject to |vn |2 pnSINRk k ,givenhkKTX : xN 1 =sk vk k=1SINRk = BRX : yk = hk x + zk|hk vk |2 2 2 j=k |hk vk | + N = b=1 Ntb TX antennas MISO Fixed pn per-antenna target powers how (?) 34. Dissecting CoMP Energy EciencyExample 1: Power minimization problem [Yu&Lan 2007] minimizeV {vk }subject to |vn |2 pnSINRk k ,givenhkKTX : xN 1 =sk vk k=1SINRk = BRX : yk = hk x + zk|hk vk |2 2 2 j=k |hk vk | + N = b=1 Ntb TX antennas MISO Fixed pn per-antenna target powers how (?) Per user k target SINRs QoS balancing (?) 35. Dissecting CoMP Energy EciencyExample 1: Power minimization problem [Yu&Lan 2007] minimizeV {vk }subject to |vn |2 pnSINRk k ,givenhkKTX : xN 1 =sk vk k=1SINRk = BRX : yk = hk x + zk|hk vk |2 2 2 j=k |hk vk | + N = b=1 Ntb TX antennas MISO Fixed pn per-antenna target powers how (?) Per user k target SINRs QoS balancing (?) Perfectly known hk for all users overhead (!) 36. Dissecting CoMP Energy EciencyExample 2: Power minimization problem [Song et al. 2007] Kminimize p>0,V,Uwk p k k=1subject to SINRk kKTX : xN 1 =given pk s k v kk=1SINRk =Hkj and wk RX : yk = uH Hkk x + zk kpk |uH Hkk vk |2 k H 2 2 j=k pj |uk Hkj vk | + 37. Dissecting CoMP Energy EciencyExample 2: Power minimization problem [Song et al. 2007] Kminimize p>0,V,Uwk p k k=1subject to SINRk kKTX : xN 1 =given pk s k v kk=1SINRk = N=B b=1Hkj and wk RX : yk = uH Hkk x + zk kpk |uH Hkk vk |2 k H 2 2 j=k pj |uk Hkj vk | + Ntb TX antennas MIMO 38. Dissecting CoMP Energy EciencyExample 2: Power minimization problem [Song et al. 2007] Kminimize p>0,V,Uwk p k k=1subject to SINRk kKTX : xN 1 =given pk s k v kk=1SINRk = BHkj and wk RX : yk = uH Hkk x + zk kpk |uH Hkk vk |2 k H 2 2 j=k pj |uk Hkj vk | + N = b=1 Ntb TX antennas MIMO Fixed pn per-antenna target powers optimized per user pk Known weight per user wk how (?) 39. Dissecting CoMP Energy EciencyExample 2: Power minimization problem [Song et al. 2007] Kminimize p>0,V,Uwk p k k=1subject to SINRk kKTX : xN 1 =given pk s k v kk=1SINRk = BHkj and wk RX : yk = uH Hkk x + zk kpk |uH Hkk vk |2 k H 2 2 j=k pj |uk Hkj vk | + N = b=1 Ntb TX antennas MIMO Fixed pn per-antenna target powers optimized per user pk Known weight per user wk how (?) Per user k t