Congestion Relief in Subway Areas by Tuning Uplink Power Control in LTE

Vallejo-Mora, Ana Belén; Toril, M.; Luna-Ramírez, Salvador; Mendo, Adriano; Pedraza, S.

doi:10.1109/tvt.2016.2632734

Cited by 8 publications

(7 citation statements)

References 30 publications

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“…As there are two interfering rings of small cells at a distance of 2R and 4R, therefore the total interference offered by the interfering rings of small cells to the central small cell eNodeB x can be given using Equation (10) and Equation (14) as:…”

Section: Interferencementioning

confidence: 99%

“…Electronics 2019, 8,796 3 of 26 In general, the fractional power control (FPC) mode is adopted for macro cell deployment, which ensures better service quality for the cell's average users at the cost of a slight degradation in the cell edge performance [7]. In References [8][9][10], the impact of α and P o on the transmit power was investigated in detail; however, the consideration of variation in the P max limit was not considered. In Reference [11], a resource allocation-based uplink transmission energy reduction scheme was presented; however, it is limited only to a macro cell environment and considers the conventional 23 dBm limit for the P max .…”

Section: Introductionmentioning

confidence: 99%

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Maximum Transmit Power for UE in an LTE Small Cell Uplink

Haider

Hwang

2019

Electronics

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To furnish the network with small cells, it is vital to consider parameters like cell size, interference in the network, and deployment strategies to maximize the network’s performance gains expected from small cells. With a small cell network, it is critical to analyze the impact of the uplink power control parameters on the network’s performance. In particular, the maximum transmit power (Pmax) for user equipment (UE) needs to be revisited for small cells, since it is a major contributor towards interference. In this work, the network performance was evaluated for different Pmax values for the small cell uplink. Various deployment scenarios for furnishing the existing macro layer in LTE networks with small cells were considered. The Pmax limit for a small cell uplink was evaluated for both homogenous small cell and heterogeneous networks (HetNet). The numerical results showed that it would be appropriate to adopt Pmax = 18 dBm in uniformly distributed small cells rather than Pmax = 23 dBm, as in macro environments. The choice of Pmax = 18 dBm was further validated for three HetNet deployment scenarios. A decrease of 0.52 dBm and an increase of 0.03 dBm and 3.29 dBm in the proposed Pmax = 18 dBm were observed for the three HetNet deployments, respectively. Furthermore, we propose that the fractional power control mode can be employed instead of the full compensation mode in small cell uplinks.

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Section: Interferencementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Maximum Transmit Power for UE in an LTE Small Cell Uplink

Haider

Hwang

2019

Electronics

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“…To quantify such changes, UL cell coupling is quantified that was utilized previously for congestion relief algorithm in Subway Areas by tuning Uplink Power Control in LTE [32]. A pair of cells (i, j) is strongly coupled when P 0 changes in cell j affect significantly the interference in cell i.…”

Section: Analytical Modelmentioning

confidence: 99%

Analytical Model for Estimating the Impact of Changing the Nominal Power Parameter in LTE

Vallejo-Mora

Toril

Luna-Ramírez

et al. 2018

Mobile Information Systems

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UpLink Power Control (ULPC) is a key radio resource management procedure in mobile networks. In this paper, an analytical model for estimating the impact of increasing the nominal power parameter in the ULPC algorithm for the Physical Uplink Shared CHannel (PUSCH) in Long Term Evolution (LTE) is presented. The aim of the model is to predict the effect of changing the nominal power parameter in a cell on the interference and Signal-to-Interference-plus-Noise Ratio (SINR) of that cell and its neighbors from network statistics. Model assessment is carried out by means of a field trial where the nominal power parameter is increased in some cells of a live LTE network. Results show that the proposed model achieves reasonable estimation accuracy, provided uplink traffic does not change significantly.

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“…In general, the DPC scheme is adopted for eNodeB deployment, which guarantees a higher QoS for the average of total cell's users by slightly minimizing the performance of the edge cells [24]. Previous studies [25][26][27] investigated the influence of ULTP in detail. Nevertheless, some assumptions regarding stability of channels over different frames, namely in mobility cases, were not taken into consideration.…”

Section: Introductionmentioning

confidence: 99%

Heterogeneous networks: Fair power allocation in LTE-A uplink scenarios

Kurda

2021

PLoS ONE

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Effective management of radio resources and service quality assurance are two of the essential aspects to furnish high-quality service in Long Term Evolution (LTE) networks. Despite the base station involving several ingenious scheduling schemes for resource allocation, the intended outcome might be influenced by the interference, especially in heterogeneous scenarios, where many kinds of small cells can be deployed under the coverage of macrocell area. To develop the network of small cells, it is essential to take into account such boundaries, in particular, mobility, interference and resources scheduling a strategy which assist getting a higher spectral efficiency in anticipate small cells. Another challenge with small cellular network deployment is further analyzing the impact of power control techniques in the uplink direction for the network performance. With that being said, this article investigates the problem of interference in LTE-advanced heterogeneous networks. The proposed scheme allows mitigation inter-cell interference through fractional self-powered control performed at each femtocell user. This study analyzes a scheme with optimum power value that provides a compromise between the served uplink signal within unwanted interference plus noise ratio to enhance spectral efficiency in terms of throughput. In particular, the maximum transmit power for user equipment in uplink direction should be reviewed for small cells as a major contributor to the interference. The simulation results showed that the proposed fractional power control approach can outperform the traditional power control employed as a full compensation mode in small cell uplinks.

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Congestion Relief in Subway Areas by Tuning Uplink Power Control in LTE

Cited by 8 publications

References 30 publications

Maximum Transmit Power for UE in an LTE Small Cell Uplink

Maximum Transmit Power for UE in an LTE Small Cell Uplink

Analytical Model for Estimating the Impact of Changing the Nominal Power Parameter in LTE

Heterogeneous networks: Fair power allocation in LTE-A uplink scenarios

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