Investigation of Open-Loop Transmit Power Control Parameters for Homogeneous and Heterogeneous Small-Cell Uplinks

다국어 초록 (Multilingual Abstract)

In Long Term Evolution (LTE) cellular networks, the transmit power control (TPC) mechanism consists of two parts: the open loop (OL) and closed loop. Most cellular networks consider OL/TPC because of its simple implementation and low operation cost. The analysis of OL/TPC parameters is essential for efficient resource management from the cellular operator's viewpoint. In this work, the impact of the OL/TPC parameters is investigated for homogeneous small cells and heterogeneous small-cell/macrocell network environments. A mathematical model is derived to compute the transmit power at the user equipment, the received power at the eNodeB, the interference in the network, and the received signal-to-interference ratio. Using the analytical platform, the effects of the OL/TPC parameters on the system performance in LTE networks are investigated. Numerical results show that, in order to achieve the best performance, it is appropriate to choose αsmall = 1 and Po-small = –100 dBm in a homogenous small-cell network. Further, the selections of αsmall = 1 and Po-small = –100 dBm in the small cells and αmacro = 0.8 and Po-macro = –100 dBm in the macrocells seem to be suitable for heterogeneous network deployment.

참고문헌 (Reference)

1 A. Simonsson, "Uplink Power Control in LTE - Overview and Performance, Subtitle: Principles and Benefits of Utilizing Rather than Compensating for SINR Variations" 1-5, 2008

2 A. Haider, "Uplink Open Loop Power Control for LTE HetNet" 83-85, 2016

3 W. Kim, "UE-Specific Interference-Aware Open-Loop Power Control in 3GPP LTE-A Uplink HetNet" 682-684, 2015

4 E. Tejaswi, "Survey of Power Control Schemes for LTE Uplink" 4 (4): 369-373, 2013

5 K. Okino, "Pico Cell Range Expansion with Interference Mitigation toward LTE-Advanced Heterogeneous Networks" 1-5, 2011

6 K. Safjan, "Open Loop Power Control Parameter Settings Impact on LTE HetNet Uplink Performance" 1134-1138, 2013

7 A. Haider, "On Uplink Power Control for Small Cell in LTE" 427-428, 2016

8 H.S. Dhillon, "Modeling Non-uniform UE Distributions in Downlink Cellular Networks" 2 (2): 339-342, 2013

9 E.R. Cirstea, "LTE Uplink Power Control and Its Impact on System Performance" 57-61, 2011

10 J.M. Kelif, "Joint Impact of Pathloss Shadowing and Fast Fading - An Outage Formula for Wireless Networks"

11 G. Boudreau, "Interference Coordination and Cancellation for 4G Networks" 47 (47): 74-81, 2009

12 M. Rahman, "Interference Avoidance with Dynamic Inter-cell Coordination for Downlink LTE System" 1-6, 2009

13 P. Koleva et al., "Improved Open Loop Power Control for LTE Uplink" 1-5, 2015

14 J.M. Kelif, "Impact of Topology and Shadowing on the Outage Probability of Cellular Networks" 1-6, 2009

15 M. Coupechoux, "How to Set the Fractional Power Control Compensation Factor in LTE?" 1-5, 2011

16 D. Lopez-Perez, "Enhanced Intercell Interference Coordination Challenges in Heterogeneous Networks" 18 (18): 22-30, 2011

17 S. Berger, "Dynamic Range-Aware Uplink Transmit Power Control in LTE Networks: Establishing an Operational Range for LTE's Open-Loop Transmit Power Control Parameters" 3 (3): 521-524, 2014

18 H. Martikainen, "Dynamic Range Aware LTE Uplink $P_o$ Optimization in HetNet" 1-6, 2016

19 A.V. Mora, "Congestion Relief in Subway Areas by Tuning Uplink Power Control in LTE" 66 (66): 6489-6497, 2017

20 B. Muhammad, "Closed Loop Power Control for LTE Uplink" Dept. Sig. Proc., Blekinge Inst. Tech. 2008

21 T.D. Novlan, "Analytical Modeling of Uplink Cellular Networks" 12 (12): 2669-2679, 2013

22 R. Kwan, "A Survey of Scheduling and Interference Mitigation in LTE" 2010 (2010): 1-10, 2010

23 J.M. Kelif, "A Fluid Model for Performance Analysis in Cellular Networks" 2010 (2010): 1-11, 2010

24 X. Ge, "5G Wireless Backhaul Networks: Challenges and Research Advances" 28 (28): 6-11, 2014

25 X. Ge, "5G Ultra-Dense Cellular Networks" 23 (23): 72-79, 2016

26 "3GPP Std TSG-RAN WG1 #51, R1-074850: Uplink Power Control for E-UTRA - Range and Representation of $P_o$"