Self-configuration, -optimisation and -healing in Wireless Networks - - PowerPoint PPT Presentation

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Self-configuration, -optimisation and -healing in Wireless Networks - - PowerPoint PPT Presentation

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Self-configuration, -optimisation and -healing in Wireless Networks A Vision on the use of self-organisation methods Dr. Werner Mohr Nokia Siemens Networks werner.mohr@nsn.com April 23, 2008 WWRF 20th Meeting Outline Drivers Vision

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  • Dr. Werner Mohr

Nokia Siemens Networks werner.mohr@nsn.com April 23, 2008 WWRF 20th Meeting

Self-configuration, -optimisation and -healing in Wireless Networks

A Vision on the use of self-organisation methods

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Page 2 WWRF#20 Dr. Werner Mohr · werner.mohr@nsn.com · 23.04.2008 · Self-organisation in Wireless Networks

Outline

  • Drivers
  • Vision
  • Expected Gains
  • State-of-the-Art
  • Challenges
  • The SOCRATES project
  • Summary
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Page 3 WWRF#20 Dr. Werner Mohr · werner.mohr@nsn.com · 23.04.2008 · Self-organisation in Wireless Networks

Drivers

Technical:

  • Increasing complexity and size of mobile networks
  • Operation of several network generations in parallel
  • Paradigm shift from telco specific towards IT networking technologies

Market:

  • Increasing diversity and complexity of offered services
  • Reduced time-to-market and lifetime of services
  • Enhanced requirements on service quality

High efforts for radio NW planning and optimisation

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Page 4 WWRF#20 Dr. Werner Mohr · werner.mohr@nsn.com · 23.04.2008 · Self-organisation in Wireless Networks

Vision

Minimise human interaction for planning, configuration and

  • ptimisation tasks

Introduction of Self-organisation methods for Wireless Mobile Networks

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Page 5 WWRF#20 Dr. Werner Mohr · werner.mohr@nsn.com · 23.04.2008 · Self-organisation in Wireless Networks

Vision (II)

Goal of self-organisation methods: Involvement of the human

  • perator only for
  • feeding the system with

policies for the desired system behaviour

  • management of failures

that cannot be solved automatically (e.g. in case a new site has to be installed, or in case of hardware failures)

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Page 6 WWRF#20 Dr. Werner Mohr · werner.mohr@nsn.com · 23.04.2008 · Self-organisation in Wireless Networks

Vision (III)

Measurement phase:

  • Continuous activity, collection of information from various sources (incl.

raw counters from network elements, active probes, mobile terminal measurements etc.) – examples are radio channel characteristics, network element load, user mobility aspects, etc. Self-optimisation phase:

  • From intelligent measurements processing (algorithms), radio and

resource management parameters are continuously updated, e.g. antenna parameters, power settings, congestion control, handover control

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Page 7 WWRF#20 Dr. Werner Mohr · werner.mohr@nsn.com · 23.04.2008 · Self-organisation in Wireless Networks

Vision (IV)

Self-configuration phase:

  • Triggered by “incidental events”, such as deployment of new network

elements or new services; includes the initial configuration of a set of parameters, e.g. radio or site-specific parameters Self-healing phase:

  • “Automated fault-management”, for example to ensure coverage in

case of dropping-out cells, by re-configuration of surrounding cells Parameter settings phase:

  • The newly calculated or updated parameters are updated at the

network element – the self-optimisation cycle continues with the measurements phase

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Page 8 WWRF#20 Dr. Werner Mohr · werner.mohr@nsn.com · 23.04.2008 · Self-organisation in Wireless Networks

Expected Gains

  • OPEX reductions
  • Less drive testing necessary
  • Less efforts for network planning, monitoring, optimisation manual

efforts substituted by self-organisation methods

  • Performance enhancements
  • Optimal and realtime tuning of radio parameters according to actual traffic

and mobility requirements, and propagation conditions

  • Optimal number of sessions at desired service quality level
  • CAPEX reductions
  • Due to optimal network utilisation delayed investment in additional capacity
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Page 9 WWRF#20 Dr. Werner Mohr · werner.mohr@nsn.com · 23.04.2008 · Self-organisation in Wireless Networks

Expected Gains Examples

IMPACT OF 'SELF-OPTIMISATION'

20 40 60 80 100

TIME SERVICE QUALITY

IMPACT OF 'SELF-HEALING'

20 40 60 80 100

TIME LOCAL SERVICE QUALITY WITH SELF-OPTIMIISATION: LESS QUALITY DEGRADATION WITHOUT SELF-OPTIMISATION: MORE QUALITY DEGRADATION REQUIRED SERVICE QUALITY TRAFFIC LOAD DELAYED INVESTMENTS SITE FAILURE WITH SELF-HEALING: QUICK RECOVERY TO TOLERABLE LEVEL WITHOUT SELF-HEALING: DRAMATIC DROP TO INTOLERABLE LEVEL SERVICE QUALITY LOCAL SERVICE QUALITY

IMPACT OF 'SELF-OPTIMISATION'

20 40 60 80 100

TIME SERVICE QUALITY

IMPACT OF 'SELF-HEALING'

20 40 60 80 100

TIME LOCAL SERVICE QUALITY WITH SELF-OPTIMIISATION: LESS QUALITY DEGRADATION WITHOUT SELF-OPTIMISATION: MORE QUALITY DEGRADATION REQUIRED SERVICE QUALITY TRAFFIC LOAD DELAYED INVESTMENTS SITE FAILURE WITH SELF-HEALING: QUICK RECOVERY TO TOLERABLE LEVEL WITHOUT SELF-HEALING: DRAMATIC DROP TO INTOLERABLE LEVEL SERVICE QUALITY LOCAL SERVICE QUALITY

1.Network investments may be postponed due to optimised utilisation

  • f network resources

2.Self-healing allows quick recovery to a tolerable service level in case of failures

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Page 10 WWRF#20 Dr. Werner Mohr · werner.mohr@nsn.com · 23.04.2008 · Self-organisation in Wireless Networks

State-of-the-Art

  • Optimisation:
  • Tool-based planning, deployment and optimisation
  • High manual interaction, especially for measurements analysis and

parameter generation

  • Long-time performance measurements used as input (weeks to months)
  • Only small number of radio parameters used
  • Configuration:
  • Manual interaction with OAM system
  • No automated configuration solutions for initial network address, software

and data provisioning

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Page 11 WWRF#20 Dr. Werner Mohr · werner.mohr@nsn.com · 23.04.2008 · Self-organisation in Wireless Networks

State-of-the-Art

  • Healing:
  • High manual interaction required for the analysis and correlation of alarm

messates, and the recovery of failures

  • Solutions for the network element internal recovery of failures are available
  • Standardisation:
  • Self-configuration and self-optimisation are current topics in 3GPP 3G

evolution standardisation

  • The operator-driven NGMN forum collects and promotes operator

requirements and recommendations on self-organisation

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Page 12 WWRF#20 Dr. Werner Mohr · werner.mohr@nsn.com · 23.04.2008 · Self-organisation in Wireless Networks

Challenges

  • Development of techniques for measuring and probing also in real

time, and corresponding data management

  • Design of methods to infer the actual network status from

measurements

  • Consideration of possible delays before the results of optimisation

actions become observable, taking also into account natural variations

  • f the environment
  • Optimisation of frequency and size of control steps to gain maximum

effectiveness, avoid oscillations in system behaviour and service quality

  • Reliability of self-organisation methods, algorithms and quality of

models

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Page 13 WWRF#20 Dr. Werner Mohr · werner.mohr@nsn.com · 23.04.2008 · Self-organisation in Wireless Networks

Challenges Example – Self-optimisation

Measure- ment Database Performance Analysis Configuration Modification Self-

  • ptimisation

Parameter Settings Measure- ments

Manual Path Self-

  • rganisation

Path

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Page 14 WWRF#20 Dr. Werner Mohr · werner.mohr@nsn.com · 23.04.2008 · Self-organisation in Wireless Networks

The SOCRATES Project

  • STREP project within the EU

Framework Programme #7

  • Duration Jan. 2008 – Dec. 2010

Goals:

  • Development, Evaluation and Demonstration of methods and

algorithms for self-configuration, self-optimisation and self-healing

  • Improve network coverage, resource utilisation and service quality
  • With a focus on 3GPP E-UTRAN, investigation of impact on

standardisation, network operations and service provisioning Self-Optimisation and self- ConfiguRATion in wirelESs networks

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Page 15 WWRF#20 Dr. Werner Mohr · werner.mohr@nsn.com · 23.04.2008 · Self-organisation in Wireless Networks

SOCRATES Phases

Requirements phase:

  • Identification of use cases and requirements for self-organisation
  • Definition of a self-organisation framework

Development phase:

  • Detailed solutions (methods and algorithms) for self-organisation
  • Validation of solutions

Integration phase:

  • Integration of solutions with framework
  • Demonstration of benefits and implications of solutions
  • Dissemination of solutions (standard contrib., workshops)
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Page 16 WWRF#20 Dr. Werner Mohr · werner.mohr@nsn.com · 23.04.2008 · Self-organisation in Wireless Networks

SOCRATES – Use Case Examples

  • Interference coordination: Minimise the impact of inter-cell interference

by managing the resources used in neighbouring cells, to ensure good cell edge performance including QoS requirements of users

  • Automatic generation of default parameters: Provide newly installed

NEs with a default set of radio network related parameters as basis for site specific configuration / optimisation

  • Load balancing: detect cells with load imbalance (cell with high load,

but neighbours with low load) and automatically shift traffic between them; to raise network accessibility and retainability

  • Cell outage prediction: estimate potential of cell outage through

continuous analysis of measurements and automatically initiate compensation actions, and inform operator

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Page 17 WWRF#20 Dr. Werner Mohr · werner.mohr@nsn.com · 23.04.2008 · Self-organisation in Wireless Networks

SOCRATES Partners

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Page 18 WWRF#20 Dr. Werner Mohr · werner.mohr@nsn.com · 23.04.2008 · Self-organisation in Wireless Networks

Conclusion

  • Self-organisation is a key approach in reducing OPEX and CAPEX of

mobile radio networks, and to enable cost-effective support of mobile communication services and applications

  • The introduction of self-organisation requires the challenging

integration of network planning, performance and configuration management, and fault management methods towards an automated and autonomous system, to enable the reduction of neccessary human interaction in network deployment and operation

  • A step-wise approach for the introduction of self-organisation is

foreseen, with a detailed study of the impact on network behaviour and service quality before taking the next step

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Page 19 WWRF#20 Dr. Werner Mohr · werner.mohr@nsn.com · 23.04.2008 · Self-organisation in Wireless Networks

Contact

SOCRATES Project Website: www.fp7-socrates.org Authors of WWRF contribution:

L.C. SCHMELZ (Nokia Siemens Networks, Munich, Germany) J.L. VAN DEN BERG, R. LITJENS (TNO ICT, Delft, The Netherlands)

  • A. EISENBLÄTTER (Atesio, Berlin, Germany)
  • M. AMIRIJOO, O. LINNELL (Ericsson, Linköping, Sweden)
  • C. BLONDIA (IBBT, Gent-Ledeberg, Belgium)
  • T. KÜRNER (TU Braunschweig, Braunschweig, Germany)
  • N. SCULLY (Vodafone, Newbury, United Kingdom)
  • J. OSZMIANSKI (Nokia Siemens Networks, Wroclaw, Poland)

Contact:

  • Dr. Werner Mohr

Nokia Siemens Networks GmbH & Co. KG 80240 München Germany werner.mohr@nsn.com Lars Christoph Schmelz Nokia Siemens Networks GmbH & Co. KG 80240 München Germany lars.schmelz@nsn.com