Improving Quality of Service of Femto Cell Using Optimum Location Identification

摘要

To enhance the throughput and Quality of Service (QoS) of indoor users, Femto cells became the best solution. The placement of a femtocell is always a challenging task due to its interference constraints with other cells. If the base stations has limited number of Femto-cells, then there is need to focus much on interference constraints. In the dense countries like India, there is a need to install more number of Femto-cells to get the proper throughput. But, the limiting factor here is frequency and interference management. This paper explained the interference management issues and hand over issues. This paper proposed method of optimal placement of Femto cell to increase the QoS in dense environment where macro-cell holds many number of Femto cells. This solution made an assumption that the interference effect was considerably strong when compared to Noise. Hence, we have not considered Noise parameter in the analysis. It was shown that the optimal placement has better throughput when compared to blind placement. Two cases were considered as blind placements and their throughput was analyzed with respect to optimal placement. The proposed method was tested in both single and multi-room buildings. Finally, it was observed that the gain of 50% was increased with respect to large buildings with many rooms. Reference [1]M. Kobayashi, S. Haruyama, R. Kohno, and M. Nakagawa, "Optimal access point placement in simultaneous broadcast system using OFDM for indoor wireless LAN," in 2000 IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. [2]V. Chandrasekhar and J. Andrews, "Spectrum allocation in tiered cellular networks," IEEE Trans. Commun., vol. 57, pp. 3059–3068, Oct. 2009. [3]D. Stamatelos and A. Ephremides, "Spectral efficiency and optimal base placement for indoor wireless networks," IEEE J. Sel. Areas Commun.,vol. 14, May 1996. [4]Y. Hou and D. I. Laurenson, "Energy efficiency of high QoS heterogeneous wireless communication network," in 2010 IEEE Vehicular Technology Conference – Fall. [5]3GPP, "TR36.814 V9.0.0: further advancements for E-UTRA physical layer aspects (Release 9)," 3GPP, Technical Report, Mar. 2010. [6]Dr Seetaiah Kilaru, Y Ashwini Prasad, K Sai kiran, N V Sarath Chandra "Design and Analysis of Heterogenious networks" in International Journal of Applied Engineering Research (IJAER), ISSN 0973-4562 Volume 9, Number 17 (2014) pp. 3197-3204. [7]Dr Seetaiah Kilaru "Ability of OFDMA in handling interference of femto cell under random access process" in Journal of Engineering science and technology review (JESTR), ISSN 1791-2377. [8]Shih-Jung Wu, "A New Handover Strategy between Femtocell and Macrocell for LTE-Based Network," Ubi-Media Computing (U-Media), 2011 4th International Conference on, vol., no., pp.203,208, 3-4 July 2011 doi: 10.1109/U-MEDIA.2011.58. [9]Khalifah, A.; Akkari, N.; Aldabbagh, G. "Dense areas femtocell deployment: Access types and challenges", e-Technologies and Networks for Development (ICeND), 2014 Third International Conference on, On page(s): 64 – 69. [10]Amirrudin, N.A.; Ariffin, S.H.S.; Malik, N.N.N.A.; Ghazali, N.E. "User's mobility history-based mobility prediction in LTE femtocells network", RF and Microwave Conference (RFM), 2013 IEEE International, On page(s): 105 – 110. [11]Jae-Wook Lee; Sang-Jo Yoo "Probabilistic handover decision for femtocell network", Information and Communication Technology Convergence (ICTC), 2014 International Conference on, On page(s): 331 – 334. [12]Fengming Cao; Zhong Fan; Sooriyabandara, M.; Farnham, T. "REM-based power control and femtocell self-organization", Telecommunications (ICT), 2013 20th International Conference on,On page(s): 1 – 5. [13]Fengming Cao; Zhong Fan "Downlink Power Control for Femtocell Networks", Vehicular Technology Conference (VTC Spring), 2013 IEEE 77th, On page(s): 1 – 5. [14]Qingzhong Li; Xuemai Gu; Hanqing Li; Min Jia; Weidang Lu "Interference alignment for MIMO downlink femtocell networks", Networks (ICON), 2013 19th IEEE International Conference on, On page(s): 1 – 4. [15]K Farkas, A Huszák, G Gódor, Optimization of Wi-Fi access point placement for indoor localization. IEEE 6th Symp. On Wireless Personal Multimedia Com. Conference 1, 28–33 (2013). [16]JM Ruiz-Aviles, S Luna-Ramirez, M Toril, F Ruiz, I de laBandera Cascales, P Mu?oz, R Barco, P Lazaro, V Buenestado, Design of a computationally efficient dynamic system-level simulator for enterprise LTE femtocell scenarios. J. Electrical Comput. Eng. 2012(1), 14 (2012). [17]MA Abd Rahman, M Dashti, J Zhang, in International Conference on Localization and GNSS. Localization of unknown indoor wireless transmitter, (2013), pp. 1–6. [18]S Wang, W Guo, T O'Farrell, in IEEE 76th Vehicular Technology Conference (VTC). Optimising femtocell placement in an interference limited network: theory and simulation, (2012), pp. 1–6. [19]L Pujji, K Sowerby, M Neve, Development of a hybrid algorithm for efficient optimisation of base station plac