1. Self-Management for Unified Heterogeneous Radio Access Networks ISWCS 2015 Twelfth International Symposium on Wireless Communication Systems Brussels, Belgium August 25, 2015

2. Session 2 Chair: Mehdi Amirijoo SON for future networks: SEMAFOUR highlights and results Mehdi Amirijoo - Ericsson, Sweden Multi-layer LTE/Wi-Fi traffic steering: from load control to throughput optimisation Yu Wang - Ericsson, Sweden Steering users based on their mobility behaviour in multi-RAT networks Bart Sas - iMinds, Belgium AAS evolution: SON solutions for vertical & virtual sectorisation Konstantinos Trichias - TNO, The Netherlands Dynamic spectrum allocation for shared use of GSM and LTE Nils Dreyer - Technische Universität Braunschweig, Germany Workshop Program 2 Workshop on Self-Management for Unified Heterogeneous Radio Access Networks, August 25, 2015

3. SON for Future Networks: SEMAFOUR Highlights and Results Mehdi Amirijoo Ericsson Research, Ericsson AB

4. SEMAFOUR Vision 4 Workshop on Self-Management for Unified Heterogeneous Radio Access Networks, August 25, 2015 Decision Support System SERVICE PROVIDER NETWORK OPERATOR HETEROGENEOUS NETWORK General Network- Oriented Objectives Network Status related to General Network- Oriented Objectives Integrated SON Management Physical Network Resources Physical Network Resources Physical Network Resources Policy-Based SON Management Monitoring & Diagnosis Operational SON Coordination Multi-RAT / Multi-layer SON WLAN Mgmt. 2G / 3G SON LTE SON UNIFIED SELF-MANAGEMENT SYSTEM

5. SON Functions for Multi RAT and Multi Layer Networks 5 Workshop on Self-Management for Unified Heterogeneous Radio Access Networks, August 25, 2015 SON Design Principles Multi-layer LTE/Wi-Fi Traffic Steering time Vertical & Virtual Sectorisation User Steering Based on Mobility Behaviour Dynamic Spectrum Allocation

6. SON Functions for Multi RAT and Multi Layer Networks 6 Workshop on Self-Management for Unified Heterogeneous Radio Access Networks, August 25, 2015 SON Design Principles time Vertical & Virtual Sectorisation Dynamic Spectrum Allocation User Steering Based on Mobility Behaviour Multi-layer LTE/Wi-Fi Traffic Steering

7.  Operators are using Wi-Fi for offloading – “Carrier grade Wi-Fi”  Current typical UE behavior: Wi-Fi If Coverage  Objective: Steer traffic between multi-layer LTE and Wi-Fi to improve user experience and network efficiency Multi-layer LTE/Wi-Fi Traffic Steering 7 Workshop on Self-Management for Unified Heterogeneous Radio Access Networks, August 25, 2015 Significant improvements compared to “WiFi if coverage”: > 50% mean UE throughput gain, > 150% cell edge throughput gain

8. SON Functions for Multi RAT and Multi Layer Networks 8 Workshop on Self-Management for Unified Heterogeneous Radio Access Networks, August 25, 2015 SON Design Principles time Vertical & Virtual Sectorisation Dynamic Spectrum Allocation Multi-layer LTE/Wi-Fi Traffic Steering User Steering Based on Mobility Behaviour

9.  High mobility occurs when – Dense deployment of cells – High velocity users  Short stays have a negative impact – Reduced QoS due to data outage during HO – More drops and HO failures – Increased signalling & data overhead in the core  Objective: design a SON function that – Unnecessary handovers are avoided – Users stay longer in the target cell – Throughput is maintained/improved  Steers users more intelligently based on predicted future mobility behaviour User Steering Based on Mobility Behaviour 9 Workshop on Self-Management for Unified Heterogeneous Radio Access Networks, August 25, 2015 Evaluated in Hannover scenario. Reduction in short stays and HO failure for users subject to SON feature

10. SON Functions for Multi RAT and Multi Layer Networks 10 Workshop on Self-Management for Unified Heterogeneous Radio Access Networks, August 25, 2015 SON Design Principles Dynamic Spectrum Allocation Multi-layer LTE/Wi-Fi Traffic Steering User Steering Based on Mobility Behaviour time Vertical & Virtual Sectorisation

11.  Active Antenna System (AAS) technology: RF components integrated in the antenna – UE beam stearing, Separate Tx-Rx tilting, Separate carrier tilting,...  Studied 2 applications: – Vertical Sectorisation (VS): inner and outer cell – Virtual sectorization (ViS): small cell in macro cell  Many dimensions to optimize, for example – VS & ViS activation – Power and BW split (interference management) – Tilt and location  Objective: design SON algorithms that based on current traffic distribution – (De)activate VS and ViS – VS power allocation – ViS BW split Vertical and Virtual Sectorisation 11 Workshop on Self-Management for Unified Heterogeneous Radio Access Networks, August 25, 2015 Significant 10 th percentile throughput gain (%) of VS SON feature compared to FULL VS 60% of cells 20-80% gain

12. SON Functions for Multi RAT and Multi Layer Networks 12 Workshop on Self-Management for Unified Heterogeneous Radio Access Networks, August 25, 2015 SON Design Principles time Vertical & Virtual Sectorisation Multi-layer LTE/Wi-Fi Traffic Steering User Steering Based on Mobility Behaviour Dynamic Spectrum Allocation

13.  Mobile traffic demand is continuously increasing: From Q1 2014 to Q1 2015: data traffic increased by 55% Voice traffic remains constant  Scarce frequency spectrum & not optimally used Dynamic Spectrum Allocation (DSA) 13 Workshop on Self-Management for Unified Heterogeneous Radio Access Networks, August 25, 2015  Objective: Optimize spectral usage by dynamically allocate spectrum 1) within LTE (intra-RAT) or 2) across technologies GSM/LTE (inter-RAT) – Intra-RAT LTE DSA: Reduce interference to highly loaded cell (cell 3) by restricting spectrum of interfering cells (cells 1,2, and 4) – Multi-RAT DSA: Introduction of LTE in GSM Traffic Channel band Source: Ericson Mobility Report June 2015 Inter-RAT: GSM/LTE: 100% gain in mean user throughput in LTE GSM/ WCDMA only GSM/ WCDMA/ LTE

14. SON Functions for Multi RAT and Multi Layer Networks 14 Workshop on Self-Management for Unified Heterogeneous Radio Access Networks, August 25, 2015 time Vertical & Virtual Sectorisation Dynamic Spectrum Allocation Multi-layer LTE/Wi-Fi Traffic Steering User Steering Based on Mobility Behaviour SON Design Principles

15. Objective Avoidance of conflicting SON behavior at design time Conflict Free SON Design and Methodology  Design Principle 1: Separation of Control  Design Principle 2: Separation of Concern  Design Principle 3: Separation of Time Scales  Methodology for detecting potential conflicts at design time SON Design Principles 15 SON Function 1 Control Parameter 1 Metric 1 SON Function 2 Control Parameter 2 Metric 2 Goal 1 Goal 2 No undesired interactions between: Dynamic Spectrum Allocation WiFi/LTE Traffic Steering Vertical and virtual sectorization Potential conflict between High Mobility and Traffic Steering, which can be alleviated by Separation of Concern Workshop on Self-Management for Unified Heterogeneous Radio Access Networks, August 25, 2015

16.  Significant network performance improvement  Improvement of the spectral usage  Major steps towards lightweight management of RAN  Impact on standardisation  Cutting edge research – New approaches for SON – State of the art simulators using Hannover scenario  Publications – 13 publications – Best paper award at EuCNC 2015 and ICWMC 2014 Achievements 16 Workshop on Self-Management for Unified Heterogeneous Radio Access Networks, August 25, 2015

17. Thank you for your attention www.fp7-semafour.eu 17 Workshop on Self-Management for Unified Heterogeneous Radio Access Networks, August 25, 2015

18. Session 2 Chair: Mehdi Amirijoo SON for future networks: SEMAFOUR highlights and results Mehdi Amirijoo - Ericsson, Sweden Multi-layer LTE/Wi-Fi traffic steering: from load control to throughput optimisation Yu Wang - Ericsson, Sweden Steering users based on their mobility behaviour in multi-RAT networks Bart Sas - iMinds, Belgium AAS evolution: SON solutions for vertical & virtual sectorisation Konstantinos Trichias - TNO, The Netherlands Dynamic spectrum allocation for shared use of GSM and LTE Nils Dreyer - Technische Universität Braunschweig, Germany Multi-RAT Multi-Layer Presentations 18 Workshop on Self-Management for Unified Heterogeneous Radio Access Networks, August 25, 2015