a roadmap to evolution of self- organising lte-advanced cellular networks
DESCRIPTION
A Roadmap to Evolution of Self- Organising LTE-Advanced Cellular Networks. Dr. Hafiz Yasar Lateef Research Scientist. Outline. The Transition From Conventional Network Operation to Self- Organising Networks (SON) Self- Organising Networks Use Cases and Functional Scope - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: A Roadmap to Evolution of Self- Organising LTE-Advanced Cellular Networks](https://reader035.vdocument.in/reader035/viewer/2022062501/5681635c550346895dd4268d/html5/thumbnails/1.jpg)
A Roadmap to Evolution of Self-Organising LTE-Advanced Cellular Networks
Dr. Hafiz Yasar LateefResearch Scientist
![Page 2: A Roadmap to Evolution of Self- Organising LTE-Advanced Cellular Networks](https://reader035.vdocument.in/reader035/viewer/2022062501/5681635c550346895dd4268d/html5/thumbnails/2.jpg)
Outline• The Transition From Conventional Network Operation to Self-
Organising Networks (SON)
• Self-Organising Networks Use Cases and Functional Scope
• Self-Organising Functions Interdependencies & Conflicts
• Self-Coordination Framework
• Trigger-Condition-Action Policy for MRO & MLB
• Future Work
![Page 3: A Roadmap to Evolution of Self- Organising LTE-Advanced Cellular Networks](https://reader035.vdocument.in/reader035/viewer/2022062501/5681635c550346895dd4268d/html5/thumbnails/3.jpg)
Conventional Cellular Networks
Fig. 1. Manual Network operation of Cellular Networks
Manual Network Operation
![Page 4: A Roadmap to Evolution of Self- Organising LTE-Advanced Cellular Networks](https://reader035.vdocument.in/reader035/viewer/2022062501/5681635c550346895dd4268d/html5/thumbnails/4.jpg)
Next Generation Cellular Networks
Fig. 2. Network Management with Closed-Loop Automation
![Page 5: A Roadmap to Evolution of Self- Organising LTE-Advanced Cellular Networks](https://reader035.vdocument.in/reader035/viewer/2022062501/5681635c550346895dd4268d/html5/thumbnails/5.jpg)
Cellular Networks Planning Cycle
Fig. 3. Network Planning, Optimisation & Operation Cycle
![Page 6: A Roadmap to Evolution of Self- Organising LTE-Advanced Cellular Networks](https://reader035.vdocument.in/reader035/viewer/2022062501/5681635c550346895dd4268d/html5/thumbnails/6.jpg)
NGMN Recommendations for SON
Fig. 4. Overview of the NGMN Top Operational Efficiency Recommendations for SON
![Page 7: A Roadmap to Evolution of Self- Organising LTE-Advanced Cellular Networks](https://reader035.vdocument.in/reader035/viewer/2022062501/5681635c550346895dd4268d/html5/thumbnails/7.jpg)
SON Standardisation in 3GPP
Fig. 5. Roadmap for SON Standardisation in 3GPP (Courtesy of [7])
![Page 8: A Roadmap to Evolution of Self- Organising LTE-Advanced Cellular Networks](https://reader035.vdocument.in/reader035/viewer/2022062501/5681635c550346895dd4268d/html5/thumbnails/8.jpg)
Fig. 6. RAN2 & RAN3 activities (Courtesy of [7])
SON Standardisation in 3GPP
![Page 9: A Roadmap to Evolution of Self- Organising LTE-Advanced Cellular Networks](https://reader035.vdocument.in/reader035/viewer/2022062501/5681635c550346895dd4268d/html5/thumbnails/9.jpg)
SON Standardisation in 3GPP
Fig. 7. SA5 activities (Courtesy of [7])
![Page 10: A Roadmap to Evolution of Self- Organising LTE-Advanced Cellular Networks](https://reader035.vdocument.in/reader035/viewer/2022062501/5681635c550346895dd4268d/html5/thumbnails/10.jpg)
High Level Operational Life Cycle without SON Co-ordination
Fig. 8. High Level Operational Life Cycle of Cellular Networks (Courtesy of [7])
![Page 11: A Roadmap to Evolution of Self- Organising LTE-Advanced Cellular Networks](https://reader035.vdocument.in/reader035/viewer/2022062501/5681635c550346895dd4268d/html5/thumbnails/11.jpg)
High Level Operational Life Cycle with SON Co-ordination
Fig. 9. High Level Operational Life Cycle of Cellular Networks with SON Co-ordination (Courtesy of [7])
![Page 12: A Roadmap to Evolution of Self- Organising LTE-Advanced Cellular Networks](https://reader035.vdocument.in/reader035/viewer/2022062501/5681635c550346895dd4268d/html5/thumbnails/12.jpg)
SON Use Cases
Fig. 10. Self-configuration, Self-Optimisation & Self-healing Use Cases
![Page 13: A Roadmap to Evolution of Self- Organising LTE-Advanced Cellular Networks](https://reader035.vdocument.in/reader035/viewer/2022062501/5681635c550346895dd4268d/html5/thumbnails/13.jpg)
Super KPI & Business Impact
Qualitatively, the overall performance of the network can be described by a ‘Super KPI’ like
P = x . “Coverage” + y . “Capacity” + z. “Quality”
where the weights x, y, and z depend on the business targets of the operator as well as on specific area, maturity of the network layer, time of day, and so on.
![Page 14: A Roadmap to Evolution of Self- Organising LTE-Advanced Cellular Networks](https://reader035.vdocument.in/reader035/viewer/2022062501/5681635c550346895dd4268d/html5/thumbnails/14.jpg)
Autonomous Networks & SON
Fig. 11. Autonomous networks & SON
![Page 15: A Roadmap to Evolution of Self- Organising LTE-Advanced Cellular Networks](https://reader035.vdocument.in/reader035/viewer/2022062501/5681635c550346895dd4268d/html5/thumbnails/15.jpg)
Role of SON Functions in Operation & Maintenance of Cellular Networks
Fig. 12. Location of SON Functions in 3GPP OAM Architecture
![Page 16: A Roadmap to Evolution of Self- Organising LTE-Advanced Cellular Networks](https://reader035.vdocument.in/reader035/viewer/2022062501/5681635c550346895dd4268d/html5/thumbnails/16.jpg)
SON Functional Scope
Fig. 13. SON Functional Spatial Scope Vs SON Function Spatial Execution
![Page 17: A Roadmap to Evolution of Self- Organising LTE-Advanced Cellular Networks](https://reader035.vdocument.in/reader035/viewer/2022062501/5681635c550346895dd4268d/html5/thumbnails/17.jpg)
Self-Organising Functions Inter-DependenciesSO functions may have complex relations and parameter/logical inter-dependencies which can induce conflicts among SO functions and eventually undermine the network operation.
Fig. 14. Shared Configuration Parameters between different SON Functions
![Page 18: A Roadmap to Evolution of Self- Organising LTE-Advanced Cellular Networks](https://reader035.vdocument.in/reader035/viewer/2022062501/5681635c550346895dd4268d/html5/thumbnails/18.jpg)
• Therefore, coordination among SO functions is essential for not only to avoid objective/parameter conflicts but also to ensure the stable operation of wireless networks.
• It is also vital to figure out the optimum way of designing Self optimization algorithms in conjunction with self co-ordination for efficient radio resource management and reduced operational expenditures (OPEX).
SON Conflicts Classification
![Page 19: A Roadmap to Evolution of Self- Organising LTE-Advanced Cellular Networks](https://reader035.vdocument.in/reader035/viewer/2022062501/5681635c550346895dd4268d/html5/thumbnails/19.jpg)
Self-Organising Function Conflicts
Fig. 15. Conflict between CCO & ICIC SO functions.
![Page 20: A Roadmap to Evolution of Self- Organising LTE-Advanced Cellular Networks](https://reader035.vdocument.in/reader035/viewer/2022062501/5681635c550346895dd4268d/html5/thumbnails/20.jpg)
• SO functions conflicts are categorised into the following five primary categories:
• (A) Key Performance Indicator Conflict; • (B) Parameter Conflict;• (C) Network Topology Mutation Conflict; • (D) Logical Dependency Conflict; • (E) Measurement Conflict.
SON Conflicts Classification
![Page 21: A Roadmap to Evolution of Self- Organising LTE-Advanced Cellular Networks](https://reader035.vdocument.in/reader035/viewer/2022062501/5681635c550346895dd4268d/html5/thumbnails/21.jpg)
![Page 22: A Roadmap to Evolution of Self- Organising LTE-Advanced Cellular Networks](https://reader035.vdocument.in/reader035/viewer/2022062501/5681635c550346895dd4268d/html5/thumbnails/22.jpg)
![Page 23: A Roadmap to Evolution of Self- Organising LTE-Advanced Cellular Networks](https://reader035.vdocument.in/reader035/viewer/2022062501/5681635c550346895dd4268d/html5/thumbnails/23.jpg)
• NTM: Network Topology Mutation
![Page 24: A Roadmap to Evolution of Self- Organising LTE-Advanced Cellular Networks](https://reader035.vdocument.in/reader035/viewer/2022062501/5681635c550346895dd4268d/html5/thumbnails/24.jpg)
SON Conflicts Classification
• Network topology mutation conflict occurs due to the change in network conditions by addition/ removal of eNB/ HeNB/ Relay.
• HeNBs are frequently switched on/off or relocated which will continuously disturb the optimum configuration of SO functions.
• Similarly, mobile relays can effect coverage area in a random pattern and will cause a NTM conflict for CCO function.
![Page 25: A Roadmap to Evolution of Self- Organising LTE-Advanced Cellular Networks](https://reader035.vdocument.in/reader035/viewer/2022062501/5681635c550346895dd4268d/html5/thumbnails/25.jpg)
![Page 26: A Roadmap to Evolution of Self- Organising LTE-Advanced Cellular Networks](https://reader035.vdocument.in/reader035/viewer/2022062501/5681635c550346895dd4268d/html5/thumbnails/26.jpg)
Mobility Load Balancing
Fig. 16. Mobility Load Balancing-Traffic Steering Decisions
![Page 27: A Roadmap to Evolution of Self- Organising LTE-Advanced Cellular Networks](https://reader035.vdocument.in/reader035/viewer/2022062501/5681635c550346895dd4268d/html5/thumbnails/27.jpg)
Mobility Load Balancing
Fig. 17. Negotiation of Handover Parameters (Courtesy of [7])
![Page 28: A Roadmap to Evolution of Self- Organising LTE-Advanced Cellular Networks](https://reader035.vdocument.in/reader035/viewer/2022062501/5681635c550346895dd4268d/html5/thumbnails/28.jpg)
SON Conflict Resolution
Fig. 18. Conflict between Mobility Load Balancing & Mobility Robustness Optimisation (Courtesy of [7])
![Page 29: A Roadmap to Evolution of Self- Organising LTE-Advanced Cellular Networks](https://reader035.vdocument.in/reader035/viewer/2022062501/5681635c550346895dd4268d/html5/thumbnails/29.jpg)
• Trigger-Condition-Action (TCA) based policy is quite useful in designing conflict free SO functions as it provides a holistic picture of all the possible triggers, SO functions conflicts, necessary conditions to be checked and the corresponding actions to be executed.
• TCA policies are the keys to design conflict free “decision tree logic” or “joint optimisation algorithms” for SO functions such as MRO, MLB, CCO and EE.
Trigger-Condition-Action Policy
![Page 30: A Roadmap to Evolution of Self- Organising LTE-Advanced Cellular Networks](https://reader035.vdocument.in/reader035/viewer/2022062501/5681635c550346895dd4268d/html5/thumbnails/30.jpg)
MLB Trigger Condition-Action Policy
![Page 31: A Roadmap to Evolution of Self- Organising LTE-Advanced Cellular Networks](https://reader035.vdocument.in/reader035/viewer/2022062501/5681635c550346895dd4268d/html5/thumbnails/31.jpg)
MRO Trigger Condition-Action Policy
![Page 32: A Roadmap to Evolution of Self- Organising LTE-Advanced Cellular Networks](https://reader035.vdocument.in/reader035/viewer/2022062501/5681635c550346895dd4268d/html5/thumbnails/32.jpg)
• Most of the previous research work has focused on intra-frequency connected mode handover condition for MRO.
• However, MRO function for inter-frequency, inter-RAT handover conditions in both connected and idle mode has been unrevealed.
• More specifically, optimum configuration of CIO, TTT, filter co-efficient, cell reselection thresholds and priorities for inter-frequency, inter-RAT handover conditions in both connected and idle mode needs to be identified.
Future Research Challenges
![Page 33: A Roadmap to Evolution of Self- Organising LTE-Advanced Cellular Networks](https://reader035.vdocument.in/reader035/viewer/2022062501/5681635c550346895dd4268d/html5/thumbnails/33.jpg)
• It must be mentioned here that most of the previous research work has focused on intra-frequency connected mode mobility load balancing.
• However, MLB function for inter-frequency, inter-
RAT cases in connected, idle and transition mode has been unrevealed.
• More specifically, optimum configuration of CIO, TTT, filter co-efficient, BB thresholds and absolute priorities for inter-frequency, inter-RAT mobility load conditions in connected, idle and transition mode needs to be identified.
Future Research Challenges
![Page 34: A Roadmap to Evolution of Self- Organising LTE-Advanced Cellular Networks](https://reader035.vdocument.in/reader035/viewer/2022062501/5681635c550346895dd4268d/html5/thumbnails/34.jpg)
• If self optimisation and self co-ordination functions are executed independently, then the algorithm part of self optimisation functions will always be executed irrespective of the subsequent acknowledgment or rejection of the action request by the Self Co-ordination function.
• Moreover, based upon the rejected action requests, numerous self optimisation algorithms might have been executed without any performance gains.
• The above mentioned facts drive for finding optimum interactions between self optimisation and self co-ordination functions.
Optimum Interactions Between Self Optimisation & Self Co-ordination Functions
![Page 35: A Roadmap to Evolution of Self- Organising LTE-Advanced Cellular Networks](https://reader035.vdocument.in/reader035/viewer/2022062501/5681635c550346895dd4268d/html5/thumbnails/35.jpg)
![Page 36: A Roadmap to Evolution of Self- Organising LTE-Advanced Cellular Networks](https://reader035.vdocument.in/reader035/viewer/2022062501/5681635c550346895dd4268d/html5/thumbnails/36.jpg)
References1. Hafiz Yasar Lateef, Ali Imran, Adna Abu-dayya, “A Framework for Classification of Self-
Organising Network Conflicts & Coordination Algorithms,” submitted to PIMRC’ 13. 2. Osianoh Glenn Aliu, Ali Imran, Muhammad Ali Imran and Barry Evans. " A Survey of
Self Organisation in Future Cellular Networks", Accepted in IEEE Journal of Survey and Tutorials on Communications.
3. 3GPP TS 32.500, "Telecommunication management; Self-Organizing Networks (SON); Concepts and requirements," v. 10.0.0, June 2010.
4. NGMN, "Recommendation on SON and O&M Requirements," Requirement Specification, www.ngmn.org, version 1.23, Dec. 2008.
5. NGMN, "Use cases related to Self Organising Network, Overall Description," White Paper, www.ngmn.org, version 2.02, Dec. 2008.
6. 3GPP, "TR 36.902 - Self-configuring and self-optimizing network (son) use cases and solutions,". Technical Specification, 2010.
7. Seppo Hämäläinen Cinzia Sartori, Henning Sanneck. "LTE Self-Organising Networks (SON): Network Management Automation for Operational Efficiency". WILEY, 2011.
![Page 37: A Roadmap to Evolution of Self- Organising LTE-Advanced Cellular Networks](https://reader035.vdocument.in/reader035/viewer/2022062501/5681635c550346895dd4268d/html5/thumbnails/37.jpg)
Thank You!