Journal of Communications and Networks

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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Beamforming Strategy Using Adaptive Beam Patterns and Power Control for Common Control Channel in Hierarchical Cell Structure Networks

  • You, Cheol-Woo (Department of Information and Communication Engineering, Myongji University) ;
  • Jung, Young-Ho (Department of Information and Telecommunication Engineering, Korea Aerospace University) ;
  • Cho, Sung-Hyun (Department of Computer Science and Research Institute of Natural Science, Gyeongsang National University)
  • Received : 2010.11.29
  • Published : 2011.08.31
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Abstract

Beamforming techniques have been successfully utilized for traffic channels in order to solve the interference problem. However, their use for control channels has not been sufficiently investigated. In this paper, a (semi-) centralized beamforming strategy that adaptively changes beam patterns and controls the total transmit power of cells is proposed for the performance enhancement of the common channel in hierarchical cell structure (HCS) networks. In addition, some examples of its practical implementation with low complexity are presented for two-tier HCS networks consisting of macro and pico cells. The performance of the proposed scheme has been evaluated through multi-cell system-level simulations under optimistic and pessimistic interference scenarios. The cumulative distribution function of user geometry or channel quality has been used as a performance metric since in the case of common control channel the number of outage users is more important than the sum rate. Simulation results confirm that the proposed scheme provides a significant gain compared to the random beamforming scheme as well as conventional systems that do not use the proposed algorithm. Finally, the proposed scheme can be applied simultaneously to several adjacent macro and pico cells even if it is designed primarily for the pico cell within macro cells.

Keywords

References

  1. H. Claussen, "Performance of macro- and co-channel femtocells in a hierarchical cell structure," in Proc. PIMRC, Sept. 2007, pp. 1-5.
  2. V. Chandrasekhar, J.G. Andrews, and A. Gatherer, "Femtocell networks: A survey," IEEE Commun. Mag., vol. 46, pp. 59-67, Sept. 2008. https://doi.org/10.1109/MCOM.2008.4623708
  3. S. Kishore, L. J. Greenstein, H. V. Poor, and S. C. Schwartz, "Soft handoff and uplink capacity in a two-tier CDMA system," IEEE Trans. Wireless Commun., vol. 4, no. 4, pp. 1297-1301, July 2005. https://doi.org/10.1109/TWC.2005.850319
  4. Z. Shen and S. Kishore, "Optimal multiple access to data access points in tiered CDMA systems," in Proc. IEEE VTC, vol. 1, Sept. 2004, pp. 719-723.
  5. K. Huang, V. K. N. Lau, and Y. Chen, "Spectrum sharing between cellular and mobile ad hoc networks: transmission-capacity trade-off," IEEE J. Sel. Areas Commun., vol. 27, no. 7, pp. 1256-1267, Sept. 2009. https://doi.org/10.1109/JSAC.2009.090921
  6. N. Jindal, J. G. Andrews, and S.Weber, "Bandwidth partitioning in decentralized wireless networks," IEEE Trans. Wireless Commun., vol. 7, pp. 5408-5419, Dec. 2008. https://doi.org/10.1109/T-WC.2008.071220
  7. V. Chandrasekhar and J. G. Andrews, "Uplink capacity and interference avoidance for two-tier femtocell networks," IEEE Trans. Wireless Commun., vol. 8, pp. 3498-3509, July 2009. https://doi.org/10.1109/TWC.2009.070475
  8. NEC, "NEC's proposals for LTE Advanced," 3GPP RAN IMT Advanced Workshop, Shenzhen, China, REV-080022, Apr. 2008.
  9. "Air interface for fixed and mobile broadband wireless access systems," IEEE Std. 802.16e, 2006.
  10. Qualcomm Europe, "Evaluation methodology for LTE-A proposals," 3GPP TSG-RAN WG1 #53, Kansas City, Missouri, R1-081956, May 2008.
  11. Qualcomm Europe and Vodafone, "Evaluation methodology for LTE-A Heterogeneous networks," 3GPP TSG-RAN WG1 #53bis, Warsaw, Poland, R1-082554, June 30-July 4, 2008.
  12. Qualcomm Europe, "Categorization of technical proposals for the PHY layer of LTE-A," 3GPP TSG-RAN WG1 #53, Kansas City, Missouri, R1-081957, May 2008.
  13. Alcatel-Lucent, "Requirements and concepts for LTE Advanced," 3GPP RAN IMT Advanced Workshop, Shenzhen, China, REV-080044, Apr. 2008.
  14. "IEEE 802.16m evaluation methodology," IEEE 802.16 Broadband Wireless Access WG, IEEE 802.16m-08/004r1, Mar. 2008.
  15. "WINNER II Interim Channel Models," IST-WINNER II, IST-WINNER II Deliverable D1.1.1 v1.0, Dec. 2006.
  16. "Evaluation methodologies for the SLS with relay," 3GPP TSG RANWG1 Meeting #54, Warsaw, Poland, R1-082396, June 30-July 4, 2008.
  17. ITU. (1997). Guidelines for the evaluation of radio transmission technologies for IMT-2000. [Online]. Available: http://www.itu.int