Reconfigurable intelligent surfaces (RISs) constitute a promising performance enhancement for next-generation (NG) wireless networks in terms of enhancing both their spectral efficiency (SE) and energy (EE). We conceive system serving paired power-domain non-orthogonal multiple access (NOMA) users by designing the passive beamforming weights at RISs. In an effort to evaluate network performance, we first derive best-case worst-case new channel statistics characterizing effective gains. Then,...

In this paper, a novel resource allocation design is investigated for non-orthogonal multiple access (NOMA) enhanced heterogeneous networks (HetNets), where small cell base stations (SBSs) are capable of communicating with users (SCUs) via the NOMA protocol. With aim maximizing sum rate SCUs while taking fairness issue into consideration, joint problem spectrum and power control formulated. particular, modeled as many-to-one matching game peer effects. We propose algorithm SBSs blocks...

In this paper, a novel non-orthogonal multiple access (NOMA) enhanced device-to-device (D2D) communication scheme is considered. Our objective to maximize the system sum rate by optimizing subchannel and power allocation. We propose solution that jointly assigns subchannels D2D groups allocates receivers in each group. For assignment, algorithm based on many-to-one two-sided matching theory proposed for obtaining suboptimal solution. Since allocation problem nonconvex, sequential convex...

This article proposes a novel framework of resource allocation in multi-cell intelligent reflecting surface (IRS) aided non-orthogonal multiple access (NOMA) networks, where an IRS is deployed to enhance the wireless service. The problem joint user association, subchannel assignment, power allocation, phase shifts design, and decoding order determination formulated for maximizing achievable sum rate. challenging mixed-integer non-linear decomposed into optimization subproblem (P1) with...

Reconfigurable intelligent surface (RIS) technique stands as a promising signal enhancement or cancellation for next generation networks. We design novel passive beamforming weight at RISs in multiple-input multiple-output (MIMO) non-orthogonal multiple access (NOMA) network simultaneously serving paired users, where based (SCB) is employed. In order to implement the proposed SCB design, we first evaluate minimal required number of both diffuse scattering and anomalous reflector scenarios....

Massive multiple-input and multiple-output (MIMO) heterogeneous networks (HetNets) have been recognized as key enabling technologies for future fifth generation (5G) mobile networks. However, the circuit power consumption of massive MIMO scales with tremendous number antennas. As a result, problem energy efficient user association in enabled HetNets is vital importance. We investigate HetNets, formulate network logarithmic utility maximization problem. Based on Lagrangian dual analysis, low...

We propose an opportunistic user association for multi-service HetNets aiming to guarantee quality of service (QoS) human-to-human (H2H) traffic while providing fair resource allocation machine-to-machine (M2M) traffic. classify H2H as primary and M2M secondary service. The is formulated optimization problem, which can be resolved by Nash Bargaining Solution (NBS). Simulation results show that the proposed algorithm enable network operators support without jeopardizing QoS

In this paper, a novel non-orthogonal multiple access (NOMA)-based device-to-device (D2D) communications framework is proposed. A major novelty of the proposed that it introduces new concept ``D2D group" which utilizes NOMA transmission, enabling one D2D transmitter to communicate with receivers simultaneously. Based on considered framework, resource allocation optimization problem formulated, where groups are allowed reuse same subchannel. The objective work maximize system sum rate by...

In this letter, we aim to solve the resource allocation problem for device-to-device (D2D) communications underlaying cellular networks. Particularly, multiple D2D pairs are allowed reuse same block (RB), and one pair is use spectrum of RBs. Our objective maximize system sum rate by satisfying signal-to-interference-plus-noise ratio constraints both user equipments. order non-deterministic polynomial-time hard optimization problem, propose a novel algorithm obtaining sub-optimal solution...

One of the key 5G scenarios is that device-to-device (D2D) and massive multiple-input multiple-output (MIMO) will be co-existed. However, interference in uplink D2D underlaid MIMO cellular networks needs to coordinated, due vast transmissions. To this end, paper introduces a spatially dynamic power control solution for mitigating cellular-to-D2D D2D-to-cellular interference. In particular, proposed policy rather flexible, including special cases no links or using maximum transmit power....

In this article, we propose artificial intelligence (AI) enabled unmanned aerial vehicle (UAV) aided wireless networks (UAWN) for overcoming the challenges imposed by random fluctuation of channels, blocking and user mobility effects. UAWN, multiple UAVs are employed as base stations, which capable promptly adapting to randomly fluctuating environment collecting information about users' position tele-traffic demands, learning from acting upon satisfaction level feedback received users....

This article mainly focus on addressing the nonorthogonal multiple access (NOMA) enhanced unmanned aerial vehicle (UAV)-to-Everything (U2X) networks. A novel three dimension (3D) network for providing wireless services to randomly roaming NOMA receivers (Rxs) in sphere space is proposed by utilizing stochastic geometry tools. In an effort evaluate performance of network, we first derive closed-form expressions outage probability and ergodic rate paired Rxs. Both diversity orders...

A self-organizing load balancing framework is proposed in this paper. It provides self-optimizing policies to improve adaptation and robustness of Fixed Relay Station (FRS) based cellular networks. The proposes a Self-organizing Cooperative Partner Cluster (SCPC) concept dynamically select optimal partners each BS RS. novel Comprehensive Load Balancing Policy Stack (CLBPS) also utilize merits various policies. performance, signaling costs user experience are taken into account both SCPC...

In LTE cellular networks, the pathloss impacts performance of uplink channel power control. Therefore, control algorithms can achieve good on location where user equipment (UE) is not limited. The baseline parameter setting fractional valid for some scenarios, however, it a challenging issue to improve cell edge throughput in complex environment, especially mix indoor and outdoor UE scenario. This paper proposes novel interference based mechanism. key estimate generated by UEs other cells....

For a long period, the power system has traditionally been made up of components such as generation, transmission, transformation, distribution, and consumption. With advancement information technology, relationship between distribution consumption sectors become increasingly intertwined. Many countries, in accordance with their own developmental needs, have proposed plans for integration In China, smart combine terminal developed core equipment It complex functions high reliability...

A simultaneously transmitting and reflecting reconfigurable intelligent surface (STAR-RIS) aided communication system is investigated. robust joint beamforming design problem under the imperfect channel state information (CSI) formulated to maximize weighted sum of Jain's fairness index normalized rate. To solve this non-convex problem, an alternating optimization (AO) algorithm proposed, which leverages S-Procedure, successive convex approximation (SCA), semidefinite relaxation (SDR)....

In this paper, a fair user association scheme is proposed for heterogeneous networks (HetNets), where the optimization formulated as Nash bargaining problem. The objective to maximize sum of rate related utility, under users' minimal constrains, while considering fairness and load balance between cells in different tiers. solution coalition are adopted solve Firstly, two-player developed two base stations (BSs) bargain association. Then extended multi-player with aid Hungarian algorithm that...

In heterogeneous networks (HetNets), due to transmit power disparity between macro and pico base stations (BSs), the conventional strongest downlink (DL) reference signal received (RSRP) based user association results in high uplink (UL) interference. Such interference degrades UL performance especially terms of energy efficiency. this paper, we propose Joint Uplink Downlink User Association (JUDUA) that takes both DL efficiencies into consideration when deciding serving BS for equipments...

This paper considers a hybrid heterogeneous network (HetNet), where macro cells adopt massive multiple-input multiple-output (MIMO), and small millimeter wave (mmWave) transmissions. We assume that all base stations (BSs) are solely powered by the renewable energy. The implementation of these emerging techniques has substantial effect on user association (UA). Motivated this, we formulate problem to maximize utility while power cost each BS does not exceed harvested To solve it, low...

A novel reconfigurable intelligent surface (RIS) aided non-orthogonal multiple access (NOMA) downlink transmission framework is proposed. We formulate a long-term stochastic optimization problem that involves the of phase shifting, aiming at maximizing sum data rate mobile users (MUs) in NOMA networks. For intelligently adjusting shifting matrix point (AP), we propose deep deterministic policy gradient (DDPG) algorithm to collaboratively control reflecting elements (REs) RIS. Extensive...

Base station (BS) sleeping has been proved to be an effective technique for saving energy consumption in cellular networks. However, BSs mode might cause coverage holes, which have a negative impact on the connectivity of network. In order overcome this problem, we propose combined coordinated multi-point (CoMP) transmission and BS scheme under heterogeneous networks (HetNets) scenario. The proposed aims at improving efficiency as well increasing probability. paper, stochastic geometry...