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The number of subscribers and cellular traffic demand had grown dramatically, which is an urgent challenge face on the cellular network and system performance. Due to the problem, power allocation was exploited by many researchers in order to improve the system performance, e.g. implementation of fractional power control (FPC) as the power constraint in single carrier — frequency division multiple...
To meet the imperative need for ubiquitous mobile communication, the infrastructure of the next-generation mobile system, i.e. 5G, is developing toward a densely distributed cellular network with multiple tiers of base stations and access technologies serving users with different mobility styles and variant bandwidth demands. Therefore, strategy of power control and interference mitigation is becoming...
This paper presents the extensions of the bounded-input bounded-output (BIBO) stability analysis of the power control in multiple coexisting wireless networks from L2 gain to both L1 and L∞ gains. By making use of the linear positive system theory, this study derives the sufficient conditions of BIBO stability for the considered power control, which can examine by nature whether the power control...
This paper considers queue-driven, real-time interference mitigation aiming to maximize wireless network throughput. A best-response power control algorithm is derived from successive convex approximations, and a single power update is performed at each scheduling interval. In the high-SINR regime, the power control algorithm achieves maximum network throughput. Extending the approach to general SINR...
This paper addresses the spatial-average analysis of uplink signal to interference ratio (SIR) and throughput in massive MIMO networks with maximum ratio combining (MRC). The analysis incorporates the effects of fractional power control (FPC) and other cells interference (ICI) due to estimation error in channel state information (CSI). Based on an asymptotic approach, tractable expressions are presented...
Device-to-device (D2D) communications can improve the spectrum utilization of cellular networks, but makes the resource allocation and power control much more intractable due to the co-channel interference caused by spectrum reuse. In this paper, we propose a grouping scheme for resource allocation according to the interference limitations and energy efficiency (EE) constraints. Based on the grouping...
This paper considers the problem of joint channel allocation and power control in the uplink scenario of device-to-device communications underlaying cellular networks. The problem is formulated as a coalition formation game, then a merge-split algorithm for that game is investigated. We analyze the conditions for which an merge-split algorithm will always converge to the Dc-stable coalitional structure...
Device-to-device (D2D) underlay communication has attracted substantial research attention recently owing to its potential to enhance the network throughput. However, the caused intra-cell interference is quite a challenging issue in D2D underlaying cellular network. In this paper, we investigate the joint power control and resource allocation problem to improve the system performance in such a scenario...
We consider the problem of minimizing the total transmission power for a OFDM network where mutual interference exists among cells, with the power and load constraints for each base station (BS) and the rate demand constraint for every user. To solve the power minimization problem, we develop a distributed resource allocation and power control algorithm with low complexity. The complexity of the proposed...
Future 5G mobile networks are expected to support high numbers of simultaneously connected devices and to achieve high system spectrum efficiency at low power consumption. To attain these goals, device-to-device (D2D) communication is a key component. We allow any cellular user equipment to share its radio resource with multiple D2D devices and then develop the MiSo algorithm, which considers spectrum...
Spectrum sharing is an elegant solution to the problem of spectrum scarcity. A novel advanced approach is developed in this study to enable power-controlled cellular networks coexist with primary rotating radars. A canonical scenario is considered where a single cellular BS interferes with single rotating radar. A new mathematical model is also developed using log-normal approximations to capture...
By calculating the effective max-min SINR (signal- to-interference-plus-noise ratio) and the corresponding power controls explicitly, and selectively dropping a small number of mobiles based on a simple and effective algorithm, we demonstrate that for both downlink and uplink, employing maximum-ratio or zero-forcing linear pre-coding and de-coding, Massive MIMO with max- min power control performs...
This paper proposes a novel uplink power control scheme in a single cell for massive MIMO (Multiple-Input-Multiple-Output). The proposed algorithm exploits the spatial degrees of freedom provided by massive MIMO to achieve the highest signal to interference-plus-noise ratio (SINR) for each user by considering the mutual spatial correlation arising from other users. It also minimizes the required uplink...
Full-duplex (FD) networks promise nearly doubled spectrum efficiency for single links with beyond 100 dB self-interference cancellation capability. However, the performance of FD networking is not that straightforward, as there will be several new types of interference introduced. Hence, it is critical to exploit some radio resource management techniques to combat the annoying interference and inevitably...
The uplink spectrum of cellular networks is often underutilized due to the asymmetric behavior of wireless data services. To enhance the efficiency, a full-duplex (FD) cellular system is proposed to reuse the uplink spectrum for concurrent uplink and downlink transmissions. By jointly designing transmit beamforming and power control, a weighted sum-interference power minimization problem is formulated...
Energy efficiency of uplink users is critical for evaluating the energy consumption of heterogeneous cellular networks (HCNs) with heavy loading. The energy efficiency of user equipments (UEs) in HCNs depends heavily on power control scheme as well as maximum power constraint. This paper investigate the energy efficiency of uplink UEs in HCNs taking into account the flexible power control policy along...
This paper analyzes the effective capacity (EC) of delay constrained machine type communication (MTC) networks operating in the finite blocklength (FB) regime. First, we derive a closed-form mathematical approximation for the EC in Rayleigh block fading channels. We characterize the optimum error probability to maximize the concave EC function and study the effect of SINR variations for different...
Dynamic time-division duplexing (TDD) is considered a promising solution to deal with fast-varying traffic often found in ultra-densely deployed networks. At the same time, it generates more interference which may degrade the performance of some user equipment (UE). When base station (BS) utilization is low, some BSs may not have an UE to serve. Rather than going into sleep mode, the idle BSs can...
In this paper, we present an analytical framework to evaluate the coverage in the uplink of millimeter wave (mmWave) cellular networks. By using a distance dependent line-of-sight (LOS) probability function, the location of LOS and non-LOS user equipment (UE) are modeled as two independent non-homogeneous Poisson point processes, with each having different pathloss exponent. The analysis takes account...
The increasingly important role of Long Term Evolution (LTE) has increased security concerns among the service provider and end users and made security of the network even more indispensable. In this paper, the power control mechanism for LTE is explored. The unprotected power control signal together with the Cell Radio Network Temporary Identifier (CRNTI) can be exploited to trick the victim User...
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