DOI QR코드

DOI QR Code

Modeling and SINR Analysis of Dual Connectivity in Downlink Heterogeneous Cellular Networks

  • Wang, Xianling (Fujian Key Laboratory of Communication Network and Information Processing Xiamen University of Technology) ;
  • Xiao, Min (Fujian Key Laboratory of Communication Network and Information Processing Xiamen University of Technology) ;
  • Zhang, Hongyi (Fujian Key Laboratory of Communication Network and Information Processing Xiamen University of Technology) ;
  • Song, Sida (Huawei Technologies Co. Ltd.)
  • Received : 2016.10.28
  • Accepted : 2017.06.19
  • Published : 2017.11.30

Abstract

Small cell deployment offers a low-cost solution for the boosted traffic demand in heterogeneous cellular networks (HCNs). Besides improved spatial spectrum efficiency and energy efficiency, future HCNs are also featured with the trend of network architecture convergence and feasibility for flexible mobile applications. To achieve these goals, dual connectivity (DC) is playing a more and more important role to support control/user-plane splitting, which enables maintaining fixed control channel connections for reliability. In this paper, we develop a tractable framework for the downlink SINR analysis of DC assisted HCN. Based on stochastic geometry model, the data-control joint coverage probabilities under multi-frequency and single-frequency tiering are derived, which involve quick integrals and admit simple closed-forms in special cases. Monte Carlo simulations confirm the accuracy of the expressions. It is observed that the increase in mobility robustness of DC is at the price of control channel SINR degradation. This degradation severely worsens the joint coverage performance under single-frequency tiering, proving multi-frequency tiering a more feasible networking scheme to utilize the advantage of DC effectively. Moreover, the joint coverage probability can be maximized by adjusting the density ratio of small cell and macro cell eNBs under multi-frequency tiering, though changing cell association bias has little impact on the level of the maximal coverage performance.

Keywords

References

  1. J. Andrews, "Seven ways that HetNets are a cellular paradigms shift," IEEE Communications Magazine, vol. 51, no. 3, pp. 136-144, Mar. 2013. https://doi.org/10.1109/MCOM.2013.6476878
  2. J. Zhang, X. Yang, Q. Yao, et al., "Cooperative Energy Efficiency Modeling and Performance Analysis in Co-Channel Interference Cellular Networks," The Computer Journal, vol. 56, no. 8, pp. 1010-1019, Aug. 2013. https://doi.org/10.1093/comjnl/bxs130
  3. C. Yang, J. Li, Q. Ni, et al., "Interference-Aware Energy Efficiency Maximization in 5G Ultra-Dense Networks," IEEE Transactions on Communications, vol. 65, no. 2, pp. 728-739, Feb. 2017. https://doi.org/10.1109/TCOMM.2016.2638906
  4. Y. Li, B. Cao and C.Wang, "Handover Schemes in Heterogeneous LTE Networks: Challenges and Opportunities," IEEE Wireless Communications, vol. 23, no. 2, pp. 112-117, Feb. 2016. https://doi.org/10.1109/MWC.2016.7462492
  5. M. Jo, T. Maksymyuk, R. Batista, et al., "A Survey of Converging Solutions for Heterogeneous Mobile Networks," IEEE Wireless Communications, vol. 21, no. 6, pp. 54-62, Dec. 2014. https://doi.org/10.1109/MWC.2014.7000972
  6. H. Zhang, X. Chu, W. Guo, et al., "Coexistence of Wi-Fi and Heterogeneous Small Cell Networks Sharing Unlicensed Spectrum," IEEE Communications Magazine, vol. 53, no. 3, pp. 158-164, Mar. 2015. https://doi.org/10.1109/MCOM.2015.7060498
  7. C. Rosa, K. Pedersen, H. Wang, et al., "Dual connectivity for LTE small cell evolution: functionality and performance aspects," IEEE Communications Magazine, vol. 54, no. 6, pp. 137-143, Jun. 2016. https://doi.org/10.1109/MCOM.2016.7498101
  8. P. Legg, P. Fotiadis and P. Soldati, "Load balancing and aggregation algorithms for LTE dual connectivity," in Proc. of IEEE Vehicular Technology Conference (VTC'2016 Spring), Nanjing, China, May 2016, pp. 1-5.
  9. Y.Wu, Y. He, L. Qian, et al., "Traffic scheduling and power allocations for mobile data offloading via dual-connectivity," in Proc. of IEEE International Conference on Communications (ICC'2016), Kuala Lumpur, Malaysia, pp. 1-5, May 2016.
  10. M. Pan, T. Lin, C. Chiu, et al., "Downlink traffic scheduling for LTE-A small cell networks with dual connectivity enhancement," IEEE Communications Letter, vol. 20, no. 4, pp. 796-799, Apr. 2016. https://doi.org/10.1109/LCOMM.2016.2522404
  11. H. Wang, G. Pocovi, C. Rosa, et al., "Configuration of dual connectivity with flow control in a realistic urban scenario," in Proc. of IEEE Vehicular Technology Conference (VTC'2015 Fall), Boston, USA, pp. 1-5, Sep. 2015.
  12. H.Wang, C. Rosa and K. Pedersen, "Inter-eNB flow control for heterogeneous networks with dual connectivity," in Proc. of IEEE Vehicular Technology Conference (VTC'2015 Spring), Glasgow, Scotland, pp. 1-5, May 2015.
  13. G. Pocovi, S. Barcos, H.Wang, et al., "Analysis of heterogeneous networks with dual connectivity in a realistic urban deployment," in Proc. of IEEE Vehicular Technology Conference (VTC'2015 Spring), Glasgow, Scotland, pp. 1-5, May 2015.
  14. Z.Wu, W. Xie, F. Yang, et al., "User association in heterogeneous network with dual connectivity and constrained backhaul," China Communications, vol. 13, no. 2, pp. 11-20, Feb. 2016. https://doi.org/10.1109/CC.2016.7732008
  15. A. Mukherjee, "Macro-small cell grouping in dual connectivity LTE-B networks with non-ideal backhaul," in Proc. of IEEE International Conference on Communications (ICC'2014), Sydney, Australia, pp. 2520-2525, Jun. 2014.
  16. A. Mukherjee, "Optimal flow bifurcation in networks with dual base station connectivity and non-ideal backhaul," in Proc. of Asilomar Conference on Signals, Systems and Computers (Asilomar'2014), Pacific Glove, USA, pp. 521-524, Nov. 2014.
  17. S. Ahmad and D. Datla, "Distributed power allocations in heterogeneous networks with dual connectivity using backhaul state information," IEEE Transactions on Wireless Communications, vol. 14, no. 8, pp. 4574-4581, Aug. 2015. https://doi.org/10.1109/TWC.2015.2422818
  18. Y. Liu, H. Jiang, E. Tong, et al., "A MRO scheme for dual connectivity in LTE small cell enhancement scenario," in Proc. of International Conference on Communications and Networking in China (ChinaCom'2015), Shanghai, China, pp. 1-5, Aug. 2015.
  19. S. Barbera, L. Gimenez, L. Sanchez, et al., "Mobility sensitivity analysis for LTE-Advanced HetNet deployments with dual connectivity," in Proc. of IEEE Vehicular Technology Conference (VTC'2015 Spring), Glasgow, Scotland, pp. 1-5, May 2015.
  20. L. Gimennez, P. Michaelsen and K. Pedersen, "Analysis of data interruption in an LTE highway scenario with dual connectivity," in Proc. of IEEE Vehicular Technology Conference (VTC'2016 Spring), Nanjing, China, pp. 1-5, May 2016.
  21. J. Andrews, F. Baccelli and R. Ganti, "A tractable approach to coverage and rate in cellular networks," IEEE Transactions on Communications, vol. 59, no. 11, pp. 3122-3134, Nov. 2011. https://doi.org/10.1109/TCOMM.2011.100411.100541
  22. H. Jo, Y. Sang, P. Xia, et al., "Heterogeneous cellular networks with flexible cell association: a comprehensive downlink SINR analysis," IEEE Transactions on Wireless Communications, vol. 11, no. 10, pp. 3484-3495, Oct. 2012. https://doi.org/10.1109/TWC.2012.081612.111361
  23. S. Singh, H. Dhillon and J. Andrews, "Offloading in heterogeneous networks: modeling, analysis, and design insights," IEEE Transactions on Wireless Communications, vol. 12, no. 5, pp. 2484-2497, May 2013. https://doi.org/10.1109/TWC.2013.040413.121174
  24. Y. Yang, Z. Liu, B. Min, et al., "Optimal user density and power allocation for device-to-device communication underlaying cellular networks," KSII Transactions on Internet and Information Systems, vol. 9, no. 2, pp. 483-503, Feb. 2015. https://doi.org/10.3837/tiis.2015.02.001
  25. K. Yang, X. Zhang, S. Wang, et al., "Spectrum allocation and service control for energy saving based on large-scale user behavior constraints in heterogeneous networks," KSII Transactions on Internet and Information Systems, vol. 10, no. 8, pp. 3529-3550, Aug. 2016. https://doi.org/10.3837/tiis.2016.08.006
  26. S. Chiu, D. Stoyan, W. Kendall, et al., Stochastic Geometry and its Applications, 3rd Edition, John Wiley & Sons Ltd, 2013.