How to set the fractional power control compensation factor in LTE ?

Coupechoux, Marceau; Kélif, Jean-Marc

doi:10.1109/sarnof.2011.5876464

Cited by 44 publications

(35 citation statements)

References 6 publications

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“…sum average throughput per cell), cell edge throughput and power efficiency. In particular, cell-edge throughput is defined as the 5 th percentile throughput performance among all UEs, denoted as 5%-Edge, which is widely used in evaluating the performance of UE fairness [6], [11], [15].…”

Section: B Simulation Resultsmentioning

confidence: 99%

“…It provides high average percell throughput, but performs poorly in power efficiency and throughput of UEs at the cell edge. 3) Fractional Power Control (FPC) [5] is currently the most widely adopted scheme [12]- [15], which allocates transmission power by making fractional compensation of UEs' large-scale path losses, such that UEs in the interior of one cell have stronger received signal strength than UEs at the cell edge. The key drawback remains in the unsatisfying average throughput per cell.…”

Section: Introductionmentioning

confidence: 99%

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Checks and Balances: A Low-Complexity High-Gain Uplink Power Controller for CoMP

Chen

Sun

Yiping³

et al. 2016

2016 IEEE Global Communications Conference (GLOBECOM)

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Coordinated Multipoint (CoMP) promised substantial throughput gain for next-generation cellular systems. However, realizing this gain is costly in terms of pilots and backhaul bandwidth, and may require substantial modifications in physicallayer hardware. Targeting efficient throughput gain, we develop a novel coordinated power control scheme for uplink cellular networks called Checks and Balances (C&B), which checks the received signal strength of one user and its generated interference to neighboring base stations, and balances the two. C&B has some highly attractive advantages: C&B (i) can be implemented easily in software, (ii) does not require to upgrade non-CoMP physicallayer hardware, (iii) allows for fully distributed implementation for each user equipment (UE), and (iv) does not need extra pilots or backhaul communications. We evaluate the throughput performance of C&B on an uplink LTE system-level simulation platform, which is carefully calibrated with Huawei. Our simulation results show that C&B achieves much better throughput performance, compared to several widely-used power control schemes.

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Section: B Simulation Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Checks and Balances: A Low-Complexity High-Gain Uplink Power Controller for CoMP

Chen

Sun

Yiping³

et al. 2016

2016 IEEE Global Communications Conference (GLOBECOM)

View full text Add to dashboard Cite

show abstract

“…We consider two special cases: a sectorized cell, where the D2D receiver UE d2 lies on the center line of the sector, and an omnidirectional cell. In these two cases, the integral over θ in (6) can be done.…”

Section: Appendixmentioning

confidence: 99%

“…Nevertheless, LTE uplink transmission powers have to be controlled with a fair accuracy. Several power control schemes are investigated for LTE [5], [6]. As an alternative to the basic idea of uplink power control, 3GPP has approved the use of Fractional Power Control (FPC) [7], [8] which compensates a fraction of the path-loss.…”

Section: Introductionmentioning

confidence: 99%

I/Q Interference in Device-to-Device Underlay Communication with Uplink Power Control

Oruthota

Tirkkonen

2015

2015 IEEE 81st Vehicular Technology Conference (VTC Spring)

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We consider cellular network assisted Device-to-Device (D2D) communication in an orthogonal resource sharing mode. An orthogonal Frequency Division Multiple Access (FDMA) or single-carrier FDMA system is considered, and fractional power control related to the received signal at the base station is used for both cellular and D2D transmissions. This guarantees that the interference from D2D to cellular transmissions is on tolerable level. With transceiver I/Q imbalance, there may be severe interference from cellular to D2D communication when these two happen on mirror frequency resources. This leads to an I/Q near-far effect. Signal-to-interference-plus-noise ratio statistics are investigated for D2D reception in the presence of I/Q imbalance. Closed form expressions for the average cellular interference are derived. The contribution of the I/Q imbalance is comparably high at cell edge, despite the fact that the absolute interference power decreases, when the D2D pair approaches cell edge. The I/Q near-far effect the orthogonal frequency resources given to D2D.Index Terms-Device-to-device communication, Fractional power control, I/Q imbalance.

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“…In [7], the performance of FPC and closedloop PC is evaluated by system level simulations in a fully loaded network, and FPC provides a trade-off between network capacity and coverage. An analytical approach is provided in [8] as an insight into FPC parameters selection, and the impact of network environment on system performance is also analysed. However, all the above studies on FPC are limited for traditional CUDA mode only.…”

Section: Introductionmentioning

confidence: 99%

A Comparison Study of Coupled and Decoupled Uplink-Downlink Access in Heterogeneous Cellular Networks

Zhang¹,

Feng²,

Nie³

et al. 2014

2015 IEEE Global Communications Conference (GLOBECOM)

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The rapid evolution of cellular networks has brought great changes to mobile network architecture. One trend is the dense deployment of base stations (BSs) in heterogeneous cellular network (HetNets) architecture. On the other hand, the booming mobile Internet applications introduce increasingly significant imbalance in regard to Signal to Interference and Noise Ratio (SINR) statistics and traffic load between uplink (UL) and downlink (DL) in HetNets. These evolutions inspire us to exploit decoupling of UL and DL in HetNets for improving system performance. In this paper, we conduct a comparison study for the system performance of the decoupled UL/DL access (DUDA) mode and traditional coupled UL/DL access (CUDA) mode based on stochastic geometry theory. Compared to existing related work, we establish an analytical model for CUDA mode as a comparison reference and consider a more realistic system model, where we employ dynamic transmit power control in UL transmission by applying fractional power control (FPC) to model a location-dependent per-mobile power state. Numerical results reveal that DUDA mode significantly outperforms CUDA mode in terms of system rate, spectral efficiency (SE) and energy efficiency (EE) in HetNets. In addition, results also show that DUDA mode can improve load balance and fairness. Simulation results further validate the accuracy of our analytical model. Keywords-coupled and decoupled UL/DL access, FPC, HetNets, stochastic geometry, system performance I.Recently, stochastic geometry has been becoming an effective tool for modelling wireless devices distributions [9] [10]. Much research work is dedicated to analysing DL network performance by using stochastic geometry. In comparison, less effort is focused on analysing UL network performance. Especially, neither of existing work takes into account both UL/DL decoupling and FPC. The authors in [11] propose a tractable model of uplink homogeneous cellular

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How to set the fractional power control compensation factor in LTE ?

Cited by 44 publications

References 6 publications

Checks and Balances: A Low-Complexity High-Gain Uplink Power Controller for CoMP

Checks and Balances: A Low-Complexity High-Gain Uplink Power Controller for CoMP

I/Q Interference in Device-to-Device Underlay Communication with Uplink Power Control

A Comparison Study of Coupled and Decoupled Uplink-Downlink Access in Heterogeneous Cellular Networks

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