Picture of Holger Claussen

Holger Claussen

Dublin, Ireland
Department Head - Small Cells Research

Education

Ph.D. degree, February 2001 - February 2004
The University of Edinburgh, UK, in collaboration with Bell Labs.
Thesis title: "Low Complexity Receiver Architectures for High-Speed Wire-
less Multiple Input Multiple-Output (MIMO) Systems".

Dipl.Ing.(FH) and M.Eng. degree, October 1995 - July 2000
The University of Applied Sciences Kempten, Germany, and The University
of Ulster, United Kingdom.
 

Biography

Dr. Holger Claussen is leader of the Small Cells Research at Bell Labs with a team in Ireland and the US. In this role, he and his team are innovating in all areas related to future evolution, deployment, and operation of small cell networks to address the exponential growth in mobile data traffic. His research in this domain has been commercialized in Alcatel-Lucent’s (now Nokia's) Small Cell product portfolio and continues to have significant impact. He received the 2014 World Technology Award in the individual category Communications Technology for innovative work of "the greatest likely long-term significance".

Prior to this, Holger was head of the Autonomous Networks and Systems Research Department at Bell Labs Ireland, where he directed research in the area of self-managing networks to enable the first large scale femtocell deployments from 2009 onwards. During this time, he also built a cloud computing research team, focusing on predicable performance and reducing latency to enable running telecommunication applications on a cloud infrastructure. 

Holger joined Bell Labs in 2004 and began his research in the areas of auto-configuration and dynamic optimization of networks, flat cellular network architectures, user mobility, resource management, end-to-end network modeling and improving the energy efficiency of networks.

Holger received his Ph.D. degree in signal processing for digital communications from the University of Edinburgh, United Kingdom in 2004. He is author of more than 90 publications 45 granted patent families and further 70 filed patent applications. He is fellow of the World Technology Network, senior member of the IEEE, and member of the IET.
 

Honors and Awards

  • 2014 World Technology Award in the individual category Communications Technologies for innovative work of "the greatest likely long-term significance".
    Past individual winners include Elon Musk, the co-founder of PayPal and Tesla Motors, Mark Zuckerberg, the co-founder of Facebook, Larry Page and Sergey Brin, the co-founders of Google, Chad Hurley and Steve Chen, the co-founders of YouTube, Gordon Moore, the co-founder of Intel, Craig Venter, one of the first to sequence the human genome, and Al Gore, former Vice President of the United States.
    http://www.wtn.net/summit-2014/2014-world-technology-awards-winners
  • Co-recipient of the Alcatel-Lucent CEO Excellence "Game Changer" Award 2011 for contributions to lightRadio.
  • Bell Labs Inventors Award 2009 for exemplifying excellence, innovation and creativity by outstanding patent contributions.
  • 2008 Eckermann-TJA Prize for the paper "Leveraging advances in mobile broad-band technology to improve environmental sustainability," Telecommunications Journal of Australia Volume 59, No. 1, February 2009.
  • Member of the Alcatel-Lucent Technical Academy (2008-2013) for exceptional contributions to Alcatel-Lucent's technology leadership.
  • Corporate Social Responsibility 2008 Champions Award for the project "Reducing Energy Consumption of Cellular Networks using a Hierarchical Macro-Picocell Architecture"($10,000 donated to the WWF UK).
  • Excellent Paper Award for the paper "Improved Max-Log-MAP turbo decoding using maximum mutual information combining" at the 14th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications PIMRC 2003, Beijing, China.
  • Best Paper Award for the paper "Layered encoding for 16- and 64-QAM iterative MIMO receivers" at the 5th European Personal Mobile Communications Conference EPMCC 2003, Glasgow, UK.
     

 


Selected Articles and Publications

  1. L. Ho, D. López-Pérez, H. Claussen, and E. Doumanis, “Downward Facing Directional Antennas for Ultra High Densty Indoor Small Cells,” submitted to IEEE Vehicular Technology Conference (VTC), 2015.
  2. D. Ming, M. Zhang, D. López-Pérez, and H. Claussen, “Correlated Shadow Fading for Cellular Network System-Level Simulations with Wrap-Around,” submitted to IEEE International Conference on Communications (ICC), 2015.
  3. M. Dashti, M.A. Abd Rahman., H. Mahmoudi, H. Claussen, “Detecting Co-located Mobile users,” submitted to IEEE International Conference on Communications (ICC), 2015.
  4. Y. Liu, M. Dashti, H. Claussen, X. Tuy, J. Zhang, “Semi-automatic site-survey for indoor localization,” submitted to IEEE International Conference on Communications (ICC), 2015.
  5. A. Jafari, D. López-Pérez, H. Song, H. Claussen, L. Ho and J. Zhang, “Small Cell Backhaul: Challenges and Prospective Solutions,” submitted to EURASIP Journal on Wireless Communications and Networking.
  6. W. Cheng, J. He, Z. Tang, D. D. López-Pérez, and H. Claussen, “Analytical Evaluation of Higher Order Sectorizations, Frequency Reuse Schemes and User Classification Methods in OFDMA Networks,” submitted to IEEE Transactions Wireless Communications.
  7. X. Wu, H. Claussen, M. D. Renzo, and H. Haas, “Channel estimation for spatial modulation,” IEEE Transactions on Communications (to appear), 2015.
  8. T. Mastelic, A. Oleksiak, H. Claussen, I. Brandic, J.-M. Pierson, and A. V. Vasilakos, “Cloud computing: Survey on energy efficiency,” ACM Trans. Embedd. Comput. Syst. (to appear), vol. 47, no. 2, 2015.
  9. R. Razavi, L. Ho, H. Claussen, and D. López-Pérez, “Improving small cell performance through switched multi-element antenna systems in heterogeneous networks,” IEEE Transaction on Vehicular Technology (to appear), 2014.
  10. D. López-Pérez, H. Claussen, and L. Ho, “The sector offset configuration concept and its applicability to heterogeneous cellular networks,” IEEE Communications Magazine (to appear), 2014.
  11. J. Fakidis, M. Ijaz, S. Kucera, H. Claussen, and H. Haas, “On the design of an optical wireless link for small cell backhaul communication and energy,” in Proc. IEEE Int. Symp. Personal, Indoor and Mobile Radio Commun. (PIMRC), Washington, DC, USA, Sept. 2014
  12. D. López-Pérez and H. Claussen, “Improved frequency reuse schemes through sector offset configuration in LTE heterogeneous networks,” in Proc. IEEE International Conference on Communications (ICC) 2014, Sydney, Australia, Jun. 2014.
  13. R. Razavi and H. Claussen, “Digital fountain codes with reduced latency, complexity and buffer requirements for wireless communications,” in Proc. IEEE Vehicular Technology Conference 2014 Spring, Seoul, South Korea, May 2014.
  14. S. Kucera, L. Ho, R. Razavi, and H. Claussen, “Coverage optimization tradeoffs in heterogeneous W-CDMA networks with co-channel small cells,” in Proc. IEEE Vehicular Technology Conference 2014 Spring, Seoul, South Korea, May 2014.
  15. S. Kucera and H. Claussen, “Impact of co-channel small cell deployments on uplink capacity of W-CDMA cellular networks,” in Proc. IEEE Vehicular Technology Conference 2014 Spring, Seoul, South Korea, May 2014.
  16. D. López-Pérez, X. Chu, A. Vasilakos, and H. Claussen, “Power minimization based resource allocation for interference mitigation in OFDMA femtocell networks,” IEEE Journal on Selected Areas in Communications, vol. 32, no. 12, pp. 333–344, Feb. 2014.
  17. S. Kucera and H. Claussen, “Uplink-oriented deployment guidelines and optimization in W-CDMA heterogeneous networks,” in Proc. IEEE Globecom 2013, Atlanta, USA, Dec. 2013.
  18. R. Razavi, D. López-Pérez, and H. Claussen, “A new approach for scrambling and spreading code reuse in WCDMA networks,” in Proc. IEEE Globecom 2013, Atlanta, USA, Dec. 2013.
  19. A. Zakrzewska, D. López-Pérez, S. Kucera, and H. Claussen, “Dual connectivity in LTE HetNets with split control- and user-plane,” in Proc. IEEE Globecom 2013, Atlanta, USA, Dec. 2013.
  20. D. López-Pérez, H. Claussen, and L. Ho, “Sector offset configuration with static vertical beam-forming for LTE,” in Proc. IEEE Globecom 2013, Atlanta, USA, Dec. 2013.
  21. D. López-Pérez and H. Claussen, “Duty cycles and load balancing in HetNets with eICIC almost blank subframes,” in Proc. IEEE PIMRC Workshops 2013, London, UK, Sep. 2013, pp. 173–178.
  22. H. Claussen and L. Ho, “Multi-carrier cell structures with vertical and horizontal sector offset using static beamforming,” in Proc. IEEE PIMRC 2013, London, UK, Sep. 2013, pp. 835–840.
  23. D. López-Pérez, H. Claussen, and L. Ho, “Improved frequency reuse schemes with horizontal sector offset for LTE,” in Proc. IEEE PIMRC 2013, London, UK, Sep. 2013, pp. 2159–2164.
  24. L. Ho, H. Claussen, and D. Cherubini, “Online evolution of femtocell coverage algorithms using genetic programming,” in Proc. IEEE PIMRC 2013, London, UK, Sep. 2013, pp. 3033–3038.
  25. D. López-Pérez, X. Chu, A. V. Vasilakos, and H. Claussen, “On distributed and coordinated resource allocation for interference mitigation in self-organizing LTE networks,” IEEE/ACM Transactions on Networking, vol. 21, no. 4, pp. 1145–1158, Aug. 2013.
  26. H. Claussen and L. T. W. Ho, “Multi-carrier cell structures with offset sectorization for heterogeneous networks,” in Proc. IEEE International Conference on Communications (ICC), Budapest, Hungary, May. 2013, pp. 1215–1220.
  27. R. Razavi and H. Claussen, “Improved fuzzy reinforcement learning for self-optimisation of heterogeneous wireless networks,” in Proc. IEEE International Conference on Telecommunications (ICT), Casablanca, Morocco, May. 2013.
  28. R. Razavi, D. López-Pérez, and H. Claussen, “Neighbour cell list management in wireless heterogeneous networks,” in Proc. IEEE Wireless Communications and Networking Conference (WCNC), Shanghai, China, Apr. 2013, pp. 1220–1225.
  29. E. Hemberg, L. T. W. Ho, M. O’Neill, and H. Claussen, “A comparison of grammatical genetic programming grammars for controlling femtocell network coverage,” Genetic Programming and Evolvable Machines, Springer, pp. 1–29, Oct. 2012.
  30. E. Hemberg, L. Ho, M. O’Neill, and H. Claussen, “Evolving femtocell algorithms with dynamic & stationary training scenarios,” in Proc. 12th Int. Conf. on Parallel Problem Solving from Nature (PPSN), Taormina, Italy, Sept. 2012.
  31. A. Checco, R. Razavi, D. J. Leith, and H. Claussen, “Self-configuration of scrambling codes for WCDMA small cell networks,” in Proc. 23rd IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC), Sydney, Australia, Sept. 2012, pp. 149–154.
  32. H. Claussen and L. T. W. Ho, “Multi-carrier cell structures with angular offset,” in Proc. 23rd IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC), Sydney, Australia, Sept. 2012, pp. 1179–1184.
  33. R. Razavi, C. Androne, and H. Claussen, “Handover optimization for co-channel WCDMA heterogeneous networks,” in Proc. 23rd IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC), Sydney, Australia, Sept. 2012, pp. 905–909.
  34. R. Razavi and H. Claussen, “Controlling local service access in wireless cellular networks,” in Proc. 23rd IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC), Sydney, Australia, Sept. 2012, pp. 1126–1130.
  35. R. Razavi, S. Kucera, C. Androne, and H. Claussen, “Characterisation of other cell interference in co-channel WCDMA small cell networks,” in Proc. IEEE 75th Vehicular Technology Conference (VTC), Yokohama, Japan, May. 2012.
  36. J. G. Andrews, H. Claussen, M. Dohler, S. Ragan, and M. C. Reed, “Femtocells: Past, present, and future,” IEEE Journal on Selected Areas in Communications (JSAC), Special Issue: Femtocell Networks, vol. 30, no. 3, pp. 497–508, Apr. 2012.
  37. R. Razavi and H. Claussen, “Urban small cell deployments: Impact on the network energy consumption,” in Proc. IEEE Wireless Communications and Networking Conference (WCNC), Paris, France, Apr. 2012, pp. 47–52.
  38. R. Razavi and H. Claussen, “Self-configuring switched multi-element antenna system for interference mitigation in femtocell networks,” in Proc. 22nd IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC), Toronto, Canada, Sep. 2011, pp. 237–242.
  39. D. López-Pérez, X. Chu, T. Vasilakos, and H. Claussen, “Minimising cell transmit power: Towards self-organized resource allocation in OFDMA femtocells,” in Proc. ACM SIGCOMM, Toronto, Canada, Aug. 2011, pp. 410–411.
  40. E. Hemberg, L. T. W. Ho, M. O’Neill, and H. Claussen, “A symbolic regression approach to manage femtocell coverage using grammatical genetic programming,” in Proc. 20th ACM Genetic and Evolutionary Computation Conference (GECCO), Dublin, Ireland, July 2011, pp. 639–646.
  41. R. Razavi, S. Klein, and H. Claussen, “A fuzzy reinforcement learning approach for self-optimization of wireless coverage in LTE networks,” Bell Labs Technical Journal, vol. 15, no. 3, pp. 153–176, Nov 2010.
  42. H. Claussen and L. G. Samuel, “The future of small cell networks,” IEEE COMSOC MMTC E-Letter, vol. 5, no. 5, pp. 32–36, Sep. 2010.
  43. R. Razavi, S. Klein, and H. Claussen, “Self-optimization of capacity and coverage in LTE networks using a fuzzy reinforcement learning approach,” in Proc. 21th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC), Istanbul, Turkey, Sep. 2010, pp. 1865–1870.
  44. V. M. Nguyen and H. Claussen, “Efficient self-optimization of neighbour lists in macrocellular networks,” in Proc. 21th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC), Istanbul, Turkey, Sep. 2010, pp. 1923–1928.
  45. I. Ashraf, H. Claussen, and L. T. W. Ho, “Distributed radio coverage optimization in enterprise femtocell networks,” in Proc. IEEE International Conference on Communications (ICC), Cape Town, South Africa, May. 2010.
  46. I. Guvenc, S. Saunders, O. Oyman, H. Claussen, and A. Gatherer, “Editorial - femtocell networks,” EURASIP Journal on Wireless Communications and Networking, pp. 1–2, 2010.
  47. H. Claussen, I. Ashraf, and L. T. W. Ho, “Dynamic idle mode procedures for femtocells,” Bell Labs Technical Journal, vol. 15, no. 2, pp. 95–116, Aug. 2010.
  48. I. Ashraf, L. T. W. Ho, and H. Claussen, “Improving energy efficiency of femtocell base stations via user activity detection,” in Proc. IEEE Wireless Communications and Networking Conference (WCNC), Sydney, Australia, Apr. 2010.
  49. D. Calin, H. Claussen, and H. Uzunalioglu, “On femto deployment architectures and macrocell offloading benefits in joint macro-femto deployments,” IEEE Communications Magazine, vol. 48, no. 1, pp. 26–32, Jan. 2010.
  50. L. T. W. Ho, I. Ashraf, and H. Claussen, “Evolving femtocell coverage optimization algorithms using genetic programming,” in Proc. 20th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC), Tokyo, Japan, Sept. 2009, pp. 2132–2136.
  51. H. Claussen and D. Calin, “Macrocell offloading benefits in joint macro- and femtocell deployments,” in Proc. 20th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC), Tokyo, Japan, Sept. 2009, pp. 350–354.
  52. J. O’Carrol, H. Claussen, and L. Doyle, “Partial GSM spectrum reuse for femtocells,” in Proc. 20th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC), Tokyo, Japan, Sept. 2009, pp. 2111–2116.
  53. H. Claussen, L. T. W. Ho, and F. Pivit, “Self-optimization of femtocell coverage to minimize the increase in core network mobility signalling,” Bell Labs Technical Journal, vol. 14, no. 2, pp. 155–184, Aug. 2009.
  54. H. Claussen, “Autonomous self-deployment of wireless access networks,” Bell Labs Technical Journal, vol. 14, no. 1, pp. 55–72, May 2009.
  55. H. Claussen and F. Pivit, “Femtocell coverage optimization using switched multi-element antennas,” in Proc. IEEE International Conference on Communications (ICC), Dresden, Germany, June 2009.
  56. J. D. Hobby and H. Claussen, “Deployment options for femtocells and their impact on existing macrocellular networks,” Bell Labs Technical Journal, vol. 13, no. 4, pp. 145–160, Feb. 2009.
  57. H. Claussen, L. T. W. Ho, and F. Pivit, “Leveraging advances in mobile broadband technology to improve environmental sustainability,” Telecommunications Journal of Australia, vol. 59, no. 1, pp. 4.1–4.18, Feb. 2009.
  58. H. Claussen, “Co-channel operation of macro- and femtocells in a hierarchical cell structure,” International Journal of Wireless Information Networks, vol. 15, no. 3, pp. 137–147, Dec. 2008.
  59. H. Claussen, L. T. W. Ho, and F. Pivit, “Effects of joint macrocell and residential picocell deployment on the network energy efficiency,” in Proc. 19th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC), Cannes, France, Sept. 2008.
  60. H. Claussen, L. T. W. Ho, and L. G. Samuel, “Self-optimization of coverage for femtocell deployments,” in Proc. Wireless Telecommunications Symposium (WTS), Los Angeles, USA, Apr. 2008, pp. 278–285.
  61. H. Claussen, L. T. W. Ho, and L. G. Samuel, “An overview of the femtocell concept,” Bell Labs Technical Journal, vol. 13, no. 1, pp. 221–245, May 2008.
  62. H. Claussen, “Performance of macro- and co-channel femtocells in a hierarchical cell structure,” in Proc. 18th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC), Athens, Greece, Sept. 2007.
  63. L. T. W. Ho and H. Claussen, “Effects of user-deployed, co-channel femtocells on the call drop probability in a residential scenario,” in Proc. 18th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC), Athens, Greece, Sept. 2007.
  64. H. Claussen, L. T. W. Ho, and L. G. Samuel, “Financial analysis of a pico-cellular home network deployment,” in Proc. IEEE International Conference on Communications (ICC), Glasgow, UK, June 2007, pp. 5604–5609.
  65. H. R. Karimi, L. T. W. Ho, H. Claussen, and L. G. Samuel, “Evolution towards dynamic spectrum sharing in mobile communications,” in Proc. 17th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC), Helsinki, Finland, Sept. 2006.
  66. H. Claussen, “Distributed algorithms for robust self-deployment and load balancing in autonomous wireless access networks,” in Proc. IEEE International Conference on Communications (ICC), Istanbul, Turkey, June 2006, pp. 1927–1932.
  67. H. Claussen, “Autonomous self-deployment of wireless access networks in an airport environment,” in Autonomic Communication, ser. Lecture Notes in Computer Science (LNCS), I. Stavrakakis and M. Smirnov, Eds., Springer, Berlin, Heidelberg, New York, Feb. 2006, vol. 3854, pp. 86–98.
  68. H. Claussen, L. T. W. Ho, H. R. Karimi, F. J. Mullany, and L. G. Samuel, “I, base station: Cognisant robots and future wireless access networks,” in Proc. 3rd IEEE Consumer Communications and Networking Conference (CCNC), Las Vegas, USA, Jan. 2006, pp. 595–599.
  69. H. Claussen, H. R. Karimi, and B. Mulgrew, “Low complexity detection of high-order modulations in multiple antenna systems,” IEE Proceedings Communications, vol. 152, no. 6, pp. 789–796, Dec. 2005.
  70. H. Claussen, “Efficient modelling of channel maps with correlated shadow fading in mobile radio systems,” in Proc. 16th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC), Berlin, Germany, Sept. 2005, pp. 512–516.
  71. H. Claussen, H. R. Karimi, and B. Mulgrew, “Improved Max-Log MAP turbo decoding by maximization of mutual information transfer,” EURASIP Journal on Applied Signal Processing, vol. 2005, no. 6, pp. 820–827, May 2005.
  72. L. T. W. Ho, F. J. Mullany, H. Claussen, and L. G. Samuel, “Autonomous organization of wireless network transport in a multi-provider environment,” in Proc. International Symposium on Autonomous Decentralized Systems (ISADS), Chengdu, China, Apr. 2005, pp. 719–724.
  73. F. J. Mullany, L. T. W. Ho, L. G. Samuel, and H. Claussen, “Self-deployment, self-organization: Critical future paradigms for wireless access networks,” in Autonomic Communication, ser. Lecture Notes in Computer Science (LNCS), M. Smirnov, Ed., Springer, Berlin, Heidelberg, New York, July 2005, vol. 3457, pp. 58–68.
  74. H. Claussen, H. R. Karimi, and B. Mulgrew, “Layered encoding for low complexity detection of high-order modulations in MIMO channels,” in Proc. 8th IEEE International Symposium on Spread Spectrum Techniques and Applications (ISSSTA), Sydney, Australia, Sept. 2004, pp. 7–11.
  75. H. Claussen, “Low complexity receiver architectures for high-speed wireless multiple input multiple-output (MIMO) systems,” Ph.D. dissertation, The University of Edinburgh, UK, March 2004.
  76. H. R. Karimi and H. Claussen, “Impact of modeling errors on the performance of MIMO receivers with APP and PIC detection,” in Proc. IEEE Globecomm, San Francisco, USA, Dec. 2003, pp. 1231–1236.
  77. H. Claussen, H. R. Karimi, and B. Mulgrew, “High-performance MIMO receivers based on multi-stage partial parallel interference cancellation,” in Proc. 58th IEEE Vehicular Technology Conference (VTC), Orlando, USA, Oct. 2003, pp. 414–418.
  78. H. Claussen, H. R. Karimi, and B. Mulgrew, “Improved Max-Log MAP turbo decoding using maximum mutual information combining,” in Proc. 14th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC), Beijing, China, Sept. 2003, pp. 424–428.
  79. H. Claussen, H. R. Karimi, and B. Mulgrew, “Layerered enconding for 16- and 64-QAM iterative MIMO receivers,” in Proc. 5th European Personal Mobile Communications Conference (EPMCC), Glasgow, UK, Apr. 2003, pp. 511–515.
  80. H. Claussen, H. R. Karimi, and B. Mulgrew, “A low complexity iterative receiver based on successive interference cancellation,” in Proc. Conference on Personal Wireless Communications (PWC), Singapore, Oct. 2002, pp. 105–112.
  81. H. Claussen, H. R. Karimi, and B. Mulgrew, “Performance optimization of successive interfererence cancellation detectors,” in Proc. World Wireless Congress, San Francisco, USA, May 2002.
     

Books and Chapters

  1. E. Hemberg, L. Ho, M. O’Neill, and H. Claussen, “Representing communication and learning in femtocell pilot power control algorithms,” in Genetic Programming Theory and Practice X, R. Riolo, E. Vladislavleva, M. D. Ritchie, and J. H. Moore, Eds., Springer, 2013, ch. 15, pp. 223–238.
  2. D. López-Pérez, X. Chu, and H. Claussen, “Uncoordinated femtocell deployments,” in Heterogeneous Cellular Networks: Theory, Simulation and Deployment, X. Chu, D. López-Pérez, Y. Yang, and F. Gunnarsson, Eds., Cambridge University Press, Jul. 2013, pp. 217–242.
  3. H. Claussen, L. T. W. Ho, F. Pivit, and L. G. Samuel, “Femtocell coverage optimization,” in Small Cell Networks: Deployment, PHY Techniques, and Resource Management, T. Q. S. Quek, G. de la Roche, I. Guvenc, and M. Kountouris, Eds., Cambridge University Press, July. 2013, pp. 161–186.
     

Patents

  1. L. T. W. Ho, I. Ashraf, H. Claussen, and L. G. Samuel, “Evolving algorithms for network node control in a telecommunications network by genetic programming,” United States Patent US8880052, EP2 230 634, Nov. 4, 2014.
  2. E. Jul and H. Claussen, “Interference avoidance using orthogonal channelization codes and dual pilots,” Germany, France, Gr. Brit. Patent EP2 451 104, Sep. 3, 2014.
  3. H. Claussen, F. Pivit, I. Kennedy, and F. Mullany, “Mobile touch - a cellular short range mobile phone sensor system,” Taiwan Patent TWI447 654, EP2 403 277, Aug. 1, 2014.
  4. H. Claussen, “Efficient transmit and receive processing with non-zero error probability,” Germany, France, Gr. Brit. Patent EP2 528 396, Jul. 16, 2014.
  5. R. Razavi, H. Claussen, and L. T. W. Ho, “A fuzzy rule based reinforcement learning system,” Germany, France, Gr. Brit. Patent EP2 381 394, Jul. 2, 2014.
  6. I. Ashraf and H. Claussen, “A technique for decentralized radio coverage optimization in wireless small cell networks,” Japan Patent JP5 450 822, EP2 296 394, Jan. 10, 2014.
  7. R. Razavi, H. Claussen, and L. T. W. Ho, “A method of reinforcement learning, corresponding computer program product, and data storage device therefor,” Germany, France, Gr. Brit. Patent EP2 386 987, Sep. 11, 2013.
  8. I. Kennedy and H. Claussen, “Triggering cellular user equipment to establish communication with a base station,” Germany, France, Gr. Brit. Patent EP2 451 219, Aug. 7, 2013.
  9. M. Shahid and H. Claussen, “Enabling location services based on femtocells,” Korea, Japan Patent KR101 265 509, JP5 276 180, US8 606 244, May 13, 2013.
  10. H. R. Karimi, H. Claussen, L. T. W. Ho, and L. G. Samuel, “Controlling transmit power of picocell base units,” United States, Japan Patent US8 369 859, JP5 302 188, Feb. 5, 2013.
  11. L. T. W. Ho and H. Claussen, “Automatic allocation of disparate location/routing area codes for femtocell deployments,” Japan, Korea, China Patent JP5 106 642, KR101 202 213, 200 910 007 279.5, Oct. 12, 2012.
  12. M. Shahid, L. G. Samuel, and H. Claussen, “Local network timing reference signal,” Germany, France, Gr. Brit. Patent EP2 211 581, Oct. 10, 2012.
  13. H. Claussen and I. Kennedy, “A femtocell base station, and a method of radio communication in a network comprising a femtocell base station,” U.S. Patent US8 285 293, Oct. 9, 2012.
  14. L. G. Samuel, H. Claussen, L. T. W. Ho, and M. Shahid, “Handover control,” Germany, France, Gr. Brit. Patent EP2 330 850, Sept. 05, 2012.
  15. H. Claussen, L. G. Samuel, and L. T. W. Ho, “Controlling uplink power for picocell communications within a macrocell,” Korea Patent.
  16. L. T. W. Ho, H. Claussen, and L. G. Samuel, “A picocell base station and method of adjusting transmission power of pilot signals therefrom,” United States, Japan Patent US8 229 491, JP5 265 699, Jul. 24, 2012.
  17. H. Claussen, L. T. W. Ho, and L. G. Samuel, “Detecting and reporting a picocell by a mobile station,” Japan, Korea, Germany, France, Gr. Brit., China Patent JP5 039 792, KR101 203 930, EP2 127 452, 200 780 047 201.5, Jul. 13, 2012.
  18. H. Claussen and L. T. W. Ho, “A picocell base station for wireless telecommunications providing radio coverage lobes, and a method of identifying which subset of the lobes covers a user terminal,” Japan, United States, Germany, France, Gr. Brit. Patent JP5 036 905, US8 265 701, EP2 111 068, Jul. 13, 2012.
  19. H. Claussen and F. Pivit, “Base station coverage optimization using switched multi-element antennas,” Germany, France, Gr. Brit. Patent EP2 161 851, May 15, 2012.
  20. L. T. W. Ho, H. Claussen, and L. G. Samuel, “Device for facilitating overlay network operation in an underlay network environment,” Korea, Japan, United States Patent KR101 145 198, JP5 021 039, US8 355 726, May 4, 2012.
  21. V. M. Nguyen and H. Claussen, “Method for automatically configuring a neighbor cell list for a base station in a cellular wireless network,” Germany, France, Gr. Brit. Patent EP2 205 023, Feb. 8, 2012.
  22. H. R. Karimi, H. Claussen, L. T. W. Ho, and L. G. Samuel, “Controlling base station router device definition codes,” U.S. Patent US8 108 003, Jan. 31, 2012.
  23. P. Sapiano, H. Claussen, and N. Bradley, “Method for identifying a femtocell base station as a handover target, and apparatus therefore,” Germany, France, Gr. Brit., United States Patent EP2 197 228, US8 345 633, Oct. 12, 2011.
  24. L. T. W. Ho, H. Claussen, H. R. Karimi, and L. G. Samuel, “Method and apparatus for managing interference in a wireless communication system,” Korea, Japan, Germany, France, Gr. Brit. Patent KR101 059 610, JP5 220 729, EP2 018 735, Aug. 19, 2011.
  25. J. K. Burgess and H. Claussen, “User-initiated mobile learning of preferred femtocell,” United States, Japan Patent US8 000 709, JP5 149 441, Aug. 16, 2011.
  26. I. Kennedy, H. Claussen, L. T. W. Ho, and Z. Ma, “Wireless communications using overlay network devices within coverage areas of underlay network devices,” Korea, Japan Patent KR101 036 447, JP5 031 845, May. 17, 2011.
  27. H. Claussen and L. T. W. Ho, “Automatic allocation of geographically joint area codes,” Germany, France, Gr. Brit., United States, Korea, Japan, China Patent EP2 120 491, US8 179 845, KR101 165 585, JP5 232 297, 200 910 139 006.6, May. 11, 2011.
  28. M. Shahid, H. Claussen, and L. G. Samuel, “Method for controlling voice calls admissions based on backhaul capacity measurements,” Germany, France, Gr. Brit. Patent EP2 148 550, Jan. 26, 2011.
  29. H. Claussen and L. T. W. Ho, “Method for enabling co-channel deployment of femtocells with private access,” Germany, France, Gr. Brit. Patent EP2 077 685, Dec. 29, 2010.
  30. H. Claussen, H. R. Karimi, L. T. W. Ho, and L. G. Samuel, “Establishing cell codes for picocells within a macrocell,” United States, Korea, Japan Patent US7 635 740, KR101 106 026, JP5 031 848, Nov. 16, 2010.
  31. H. Claussen, L. T. W. Ho, L. G. Samuel, and H. R. Karimi, “Automated configuration of a base station router device,” United States, China, Korea, Japan Patent US7 808 946, ZL200 780 026 557.0, KR101 086 211, JP5 063 692, Oct. 5, 2010.
  32. L. T. W. Ho, H. Claussen, and L. G. Samuel, “A method of adjusting the position of a picocell base station, and apparatus therefor,” Germany, France, Gr. Brit. Patent EP2 009 941, Oct. 14, 2009.
  33. H. Claussen, H. R. Karimi, L. T. W. Ho, and L. G. Samuel, “Automatically configuring a neighbor set for a base station,” U.S. Patent US7 603 124, US7 970 404, Oct. 13, 2009.
  34. H. Claussen and R. H. Karimi, “Decoding method and apparatus,” U.S. Patent US7 391 826, Jun. 24, 2008.
  35. H. Claussen, “Adapting a communications network of wireless access nodes to a changing environment,” U.S. Patent US7 299 069, Nov. 20, 2007.
  36. H. Claussen and R. H. Karimi, “Radio telecommunications system operative by iterative determination of soft estimates, and a corresponding method,” U.S., Germany, France, Gr. Brit. Patent US7 248 647, EP1 392 017, Oct. 4, 2006.
  37. H. Claussen and R. H. Karimi, “Radio telecommunications receiver operative to receive digital data symbols or bits by iterative determination of soft estimates, and a corresponding method,” Germany, France, Gr. Brit., U.S. Patent EP1 337 082, US7 212 579, Oct. 26, 2005.
  38. M. Dashti, H. Claussen, “Method for determining the relative position of user equipment in a wireless telecommunication network, a node and a computer program product ,” Patent application, Sept. 24, 2014.
  39. D. López-Pérez, S. Kucera, and H. Claussen, “Cell identi fication,” Patent application, Aug. 18, 2014.
  40. R. Razavi and H. Claussen, “Method for resource allocation, a node, a controller and user equipment,” Patent application, Aug. 18, 2014.
  41. M. Dashti and H. Claussen, “Method, base station, system and computer-readable medium to localize a user device,” Patent application, Apr. 16, 2014.
  42. D. López-Pérez and H. Claussen, “Mitigating UL-To-DL interference,” Patent application, Apr. 7, 2014.
  43. D. López-Pérez and H. Claussen, “Mitigating DL-UL interference,” Patent application, Apr. 7, 2014.
  44. M. Dashti, L. T. W. Ho, and H. Claussen, “A user terminal, a base station, and a method of determining received signal power and location of a user terminal,” Patent application, Mar. 31, 2014.
  45. R. Razavi and H. Claussen, “Method for selecting an antenna pattern, node, network, antenna and computer program product,” Patent application, Mar. 20, 2014.
  46. H. Claussen and D. López-Pérez, “Method for full duplex communication, network, node and computer program product,” Patent application, Mar. 10, 2014.
  47. H. Claussen and R. Razavi, “Idle mode control for wireless communication network nodes,” Patent application, Dec. 20, 2013.
  48. R. Razavi and H. Claussen, “Rateless decoding,” Patent application, Oct. 4, 2013.
  49. F. Pivit and H. Claussen, “A small cell base station, communications network and communications method,” Patent application, Oct. 03, 2013.
  50. R. Razavi and H. Claussen, “Rateless encoding,” Patent application, Sep. 10, 2013.
  51. R. Razavi and H. Claussen, “Proxy node and method,” Patent application, Jul. 15, 2013.
  52. R. Razavi and H. Claussen, “Rateless encoding,” Patent application, Jul. 15, 2013.
  53. D. López-Pérez, H. Claussen, and S. Kucera, “Wireless telecommunications network nodes and methods,” Patent application, Jul. 12, 2013.
  54. D. López-Pérez and H. Claussen, “Scheduling,” Patent application, Jun. 21, 2013.
  55. D. López-Pérez and H. Claussen, “Heterogeneous network,” Patent application, Jun. 21, 2013.
  56. H. Claussen, F. Pivit, and V. Venkateswaran, “A receiver and method of signal cancellation,” Patent application, Jun. 14, 2013.
  57. R. Razavi and H. Claussen, “Network node and method,” Patent application, Mar. 22, 2013.
  58. R. Razavi and H. Claussen, “Data transmission,” Patent application, Mar. 22, 2013.
  59. H. Claussen and R. Razavi, “Base station and methods,” Patent application, Mar. 07, 2013.
  60. R. Razavi and H. Claussen, “Cell failure compensation method and network node,” Patent application, Feb. 26, 2013.
  61. D. López-Pérez, H. Claussen, and L. T. W. Ho, “Control signalling,” Patent application, Feb. 15, 2013.
  62. R. Razavi and H. Claussen, “Heterogeneous network,” Patent application, Nov. 21, 2012.
  63. R. Razavi and H. Claussen, “Neighbour lists,” Patent application, Nov. 08, 2012.
  64. H. Claussen and L. T. W. Ho, “Frequency band selection,” Patent application, Sept. 13, 2012.
  65. H. Claussen and L. T. W. Ho, “Radio cells (2),” Patent application, Sept. 13, 2012.
  66. R. Razavi and H. Claussen, “Small cell base station control,” Patent application, Jun. 22, 2012.
  67. R. Razavi and H. Claussen, “Primary scrambling codes,” Patent application, May 3, 2012.
  68. R. Razavi and H. Claussen, “Proactive uplink transmit power increase in small cells upon outbound handovers,” Patent application, Mar. 16, 2012.
  69. H. Claussen and L. T. W. Ho, “Radio cells,” Patent application, Mar. 1, 2012.
  70. S. Kucera and H. Claussen, “Communication control,” Patent application, Feb. 29, 2012.
  71. H. Claussen, S. Bulja, and I. Kennedy, “Improved location estimation using cellular networks,” Patent application EP2 592 433, Nov. 10, 2011.
  72. H. Claussen, I. Kennedy, and S. Samuel, “Fast and secure UE identification for cellular sensors,” Patent application EP2 530 962, May 30, 2011.
  73. I. Kennedy and H. Claussen, “RF fingerprinting for handover in scalable co-channel femto cell deployments,” Patent application EP2 528 408, May 23, 2011.
  74. R. Razavi and H. Claussen, “A method for interference mitigation in small networks,” Patent application EP2 506 625, Mar. 29, 2011.
  75. D. Cherubini, P. Bosch, and H. Claussen, “Efficient multi-operator sharing of femtocells,” Patent application EP2 496 050, Mar. 01, 2011.
  76. M. Shahid, H. Claussen, L. T. W. Ho, and L. G. Samuel, “Self-deployed network with active interference cancellation,” Patent application, Nov. 12, 2010.
  77. E. Jul and H. Claussen, “Dynamic carrier jumping for efficient load distribution in femtocell co-channel operation,” Patent application EP2 426 974, Sep. 03, 2010.
  78. R. Razavi and H. Claussen, “A method for achieving self-x properties in highly dimensional or continuous systems,” Patent application EP2 413 269, Jul. 30, 2010.
  79. M. Portolan, D. Cherubini, and H. Claussen, “Automatic equivalent model generation and evolution for small cell networks,” Patent application EP2 418 889, Jul. 22, 2010.
  80. R. Razavi, H. Claussen, and L. T. W. Ho, “Exploration strategies for reinforcement learning systems,” Patent application, Apr. 20, 2010.
  81. I. Kennedy and H. Claussen, “Mobile user equipment based traffic sensor without core network connectivity,” Patent application EP2 367 161, Mar. 18, 2010.
  82. G. Rittenhouse, S. Goyal, L. G. Samuel, M. Benowitz, and Holger Claussen et. al., “Green touch: Systematic approach and network architectures,” Patent application, Jan. 22, 2010.
  83. H. Claussen and F. Pivit, “Apparatus to enable TV-receivers to send status-beacon to allow secondary frequency re-use of TV bands,” Patent application EP2 337 390, Dec. 16, 2009.
  84. M. Shahid, M. Fuente, H. Claussen, and L. G. Samuel, “Efficient cell re-selection and interference management for femtocells,” Patent application EP2 320 699, Nov. 10, 2009.
  85. H. Claussen, I. Ashraf, and M. Shahid, “Dynamic idle mode procedure for femtocells,” Patent application EP2 299 759, Sep. 17, 2009.
  86. L. T. W. Ho and H. Claussen, “Evolving femtocell coverage optimization algorithms using genetic programming,” Patent application EP2 261 841, Sep. 10, 2009.
  87. L. T. W. Ho, L. G. Samuel, H. Claussen, and I. Ashraf, “A technique to automate the creation and adaptation of specialized algorithms in network nodes in a distributed manner,” Patent application EP2 261 841.
  88. M. Portolan, H. Claussen, L. T. W. Ho, S. Goyal, and L. G. Samuel, “Fault management among base stations,” Patent application EP2 230 864, Mar. 17, 2009.
  89. J. O’Carroll and H. Claussen, “Enabling partial GSM spectrum reuse by femtocells,” Patent application EP2 219 399, Feb. 12, 2009.
  90. M. Shahid, L. G. Samuel, and H. Claussen, “A method for lawful intercept in advanced access point,” Patent application, Oct. 10, 2008.
  91. L. T. W. Ho and H. Claussen, “A user terminal for connection to a picocell base station, and a method of radio connection of a user terminal,” Patent application, Dec. 12, 2007.
  92. P. Bosch, R. McLellan, P. Polakos, L. G. Samuel, H. Claussen, and J. M. Graybeal, “Method of confirming authorized microcell base station use,” Patent application US20 090 124 235, Nov. 13, 2007.
  93. H. Claussen, L. T. W. Ho, L. G. Samuel, and P. Bosch, “Method of modifying pilot power for a home base station router based on user demand,” Patent application, Oct. 24, 2007.
  94. L. T. W. Ho, L. G. Samuel, H. Claussen, and P. Polakos, “Automatic configuration of home BSR pilot channel power,” Patent US20 090 005 043, Jun. 29, 2007.
  95. L. T. W. Ho, H. Claussen, and L. G. Samuel, “Method of administering call handover between cells in a communications system,” Patent application, Sept. 15, 2006.
  96. H. Claussen and L. G. Samuel, “Changing the scrambling code of a base station for wireless telecommunications,” Patent application US20 080 039 141, Aug. 10, 2006.
  97. F. J. Mullany, L. T. W. Ho, L. G. Samuel, H. Claussen, T. Klein, and G. Rittenhouse, “A radio access architecture with resource coordination of a plurality of base stations owned by different entities,” Patent application, Mar. 31, 2005.
  98. F. J. Mullany, L. T. W. Ho, H. Claussen, and L. G. Samuel, “Bidding a price for goods and/or services in an auction of wireless communication access requests within a marketplace,” Patent application US20 060 167 785, Jan. 27, 2005.
  99. H. Claussen, “Brokering services between wireless device users and operators,” Patent application, Jan. 27, 2005.
  100. H. Claussen, F. J. Mullany, L. T. W. Ho, and L. G. Samuel, “Transferring between or within networks a telecommunication service to a user terminal,” Patent application, Dec. 16, 2004.
  101. H. Claussen and R. H. Karimi, “Modulation in a mobile telecommunications system,” Patent application, Mar. 10, 2004.