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Heterogeneous networks increasing cellular capacity sta

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Heterogeneous networks increasing cellular capacity

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Heterogeneous networks increasing cellular capacity sta

  1. 1. Heterogeneous Networks increasing cellular capacity Abd El-Fattah Hussein Mahran
  2. 2. Agenda  Heterogeneous networks  Key options to expand network capacity  Design options for heterogeneous networks  Conclusion
  3. 3. Heterogeneous networks  Attractive means of expanding mobile network capacity.  Composed of multiple radio access technologies, architectures, transmission solutions, and base stations of varying transmission power.
  4. 4. Heterogeneous networks  Enhancing and densifying the HSPA/LTE multi-standard macro-cellular networks ◦ Meeting increasing traffic demands. ◦ Fulfilling users’ high expectations for mobile broadband services.  Article analyzes expansion strategies, covers important design choices. ◦ Focusing on transmission power differences and explores how to coordinate low power nodes and macro base stations.
  5. 5. By 2014, the average subscriber will consume about 1GB of data per month compared with today’s average figures that are around some hundred MB per month.
  6. 6. Key options to expand network capacity  Improving the macro layer  Densifying the macro layer  Complementing the macro layer with low power nodes.
  7. 7. Coexistence of macro and low power nodes
  8. 8. DL and UL monthly data volumes and data rates at 5th percentile (95 percent coverage) supported by the different expansion strategies
  9. 9. Coordination potential with two low power nodes in each macro cell cooperating with the macro base station, ISD 425m, 20MHz andwidth, 1×2 antennas
  10. 10.  The way to meet future capacity demand is by combining all three approaches ◦ Improving the macro layer ◦ Densifying the macro layer ◦ Adding pico nodes
  11. 11. Design options for heterogeneous networks  Several aspects govern effective design of HetNets ◦ Demand perspective  Traffic volumes  Traffic location  Target data rates ◦ Supply perspective  Radio environment  Macro-cellular coverage  Site availability  Backhaul transmission  Spectrum and integration with existing macro network. ◦ Commercial aspects  Technology competition  Business models  Marketing and pricing strategies
  12. 12. Design options for heterogeneous networks
  13. 13. Conclusion  Mobile-broadband traffic is increasing. In parallel, new applications are raising expectations for higher data rates in UL and DL.  By combining low power nodes with an improved and densified macro layer, very high traffic volumes and data rates can be supported.
  14. 14. Conclusion  The nature of the existing network, as well as technical and economic considerations, will dictate which approach improving the macro layer; densifying the macro layer; or adding pico nodes or combination of approaches best meets volume and data-rate targets.  Low power nodes give high data rates locally and also offer benefits to macro users by offloading and cooperating with the macro layer.
  15. 15. References  http://www.ericsson.com/ourportfolio/tel ecom-operators/heterogeneous- networks?nav=marketcategory002  http://en.wikipedia.org/wiki/Heterogeneou s_network
  16. 16. Questions

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