Power Allocation and User Assignment Scheme for beyond 5G Heterogeneous Networks

Bakht, Khush; Jameel, Furqan; Ali, Zain; Khan, Wali Ullah; Khan, Imran; Sidhu, Guftaar Ahmad Sardar; Lee, Jeong Woo

doi:10.1155/2019/2472783

Cited by 27 publications

(13 citation statements)

References 32 publications

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“…NOMA also improves user fairness, thereby, allow different users to experience the same quality of services. NOMA also does not require significant modifications in the existing network architecture [10], thus, operating with virtually no change in the cost of deployment and operation of the network. These exciting benefits of NOMA-enabled HSTRNs motivate us to further explore the performance limits of such networks and identify the performance variations under different network parameters.…”

Section: Introductionmentioning

confidence: 99%

Hybrid Satellite-Terrestrial Relay Network: Proposed Model and Application of Power Splitting Multiple Access

Kharel

et al. 2020

Sensors

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The development of hybrid satellite-terrestrial relay networks (HSTRNs) is one of the driving forces for revolutionizing satellite communications in the modern era. Although there are many unique features of conventional satellite networks, their evolution pace is much slower than the terrestrial wireless networks. As a result, it is becoming more important to use HSTRNs for the seamless integration of terrestrial cellular and satellite communications. With this intent, this paper provides a comprehensive performance evaluation of HSTRNs employing non-orthogonal multiple access technique. The terrestrial relay is considered to be wireless-powered and harvests energy from the radio signal of the satellite. For the sake of comparison, both amplify-and-forward (AF) and decode-and-forward (DF) relaying protocols are considered. Subsequently, the closed-form expressions of outage probabilities and ergodic capacities are derived for each relaying protocol. Extensive simulations are performed to verify the accuracy of the obtained closed-form expressions. The results provided in this work characterize the outage and capacity performance of such a HSTRN.

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Section: Introductionmentioning

confidence: 99%

Hybrid Satellite-Terrestrial Relay Network: Proposed Model and Application of Power Splitting Multiple Access

Kharel

et al. 2020

Sensors

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“…With this consideration in place, the , UE f ws can decode all (w-1)-th fCUEs' signals efficiently and treat all (w+1)-th fCUEs' signals as noise. Assuming that all BSs have perfect knowledge of CSI, then the Signal-to-Interference-plus-Noise-Ratio (SINR) received by , UE f ws can be represented as in (5).…”

Section: System Modelmentioning

confidence: 99%

“…The main purpose of employing small-cells into the macrocells is to improve the coverage and increase the frequency reuse of the network. The macrocells have the most extensive coverage area, and uses High Powered Base Stations (HBSs), while the small-cells have smaller coverage areas with Low Powered Base Stations (LBSs) usage [2], [5].…”

Section: Introductionmentioning

confidence: 99%

Fair Energy-Efficient Resource Allocation for Downlink NOMA Heterogeneous Networks

et al. 2020

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The increasing in energy consumptions of the current wireless networks, leads towards designing energy-efficient 5G networks. The application of non-orthogonal multiple access (NOMA) in the heterogeneous networks (HetNets) improves the spectrum utilization with the cost of efficient resource allocation. Hence, this paper proposes optimal user-pairing and power allocation solutions towards achieving fair energy-efficient resource allocation in downlink femtocell NOMA-HetNets. In the proposed optimization process, the considered constraints are the user's transmission rate, transmit power budget at the base station (BS), and the interference. The energy consumption of both the transmitter and the receiver are considered to simulate the real system design. The Greedy Algorithm (GA) is used to achieve a low-complex optimal solution during the user-pairing process. Simultaneously, the max-min energy efficiency optimization approach is employed to maximize the minimum energy efficiency of the femtocell users to achieve the optimal power allocation solution. The mathematical formulation of the max-min energy efficiency is a nonconvex fractional programming problem and is intractable. Thus, the fractional programming theory is adopted to transform the problem into a sequence of subtractive form, followed by the Sequential Convex Programming (SCP) approach to determine the optimal solution. Simulation results show that the proposed NOMA with optimal power allocation method using SCP and GA (NOMA-SCP-GA) achieves fair energy efficiency performance with lower complexity compared to the benchmark methods. Moreover, the minimum energy efficiency of the femtocell user is 38.22% higher than NOMA with Difference of Convex programming (NOMA-DC). The NOMA-SCP-GA method can assure 5G capability demands.

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“…With regard to the image processing module, as it has no such tight time constraints, it can be forwarded to the relay, which will be responsible for processing the collected data (e.g., video, images or heat sensor data) and transmitting it reliably to the destination nodes. This way, the required decoding errors are tremendously reduced, resulting in an increase in terms of the overall functionality [14].…”

Section: Introductionmentioning

confidence: 99%

Efficient Modulation Scheme for Intermediate Relay-Aided IoT Networks

et al. 2020

Self Cite

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With the surge of ubiquitous demand for high-complexity and quality mobile Internet-of-things (IoT) services, new cooperative relaying paradigms have emerged. Motivated by the long and unpredictable end-to-end communication in relay-aided IoT networks, there is a need to introduce novel modulation schemes for very low bit error rate (BER) communications. In this paper, a practical modulation mapping scheme has been proposed to reduce decoding errors. Specifically, a hybrid automatic repeat request (HARQ) system has been used with an intermediate relay to transfer a message from a source to a destination. The design of modulation mapping has been optimized by first formulating the objective as the quadratic assignment problem. Later, the solution to the mapping problem is provided using an iterative search method. To validate the proposed solution, extensive simulations have been performed in MATLAB. The results show that the proposed solution outperforms the conventional relay retransmission and the heuristic design approaches.

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Power Allocation and User Assignment Scheme for beyond 5G Heterogeneous Networks

Cited by 27 publications

References 32 publications

Hybrid Satellite-Terrestrial Relay Network: Proposed Model and Application of Power Splitting Multiple Access

Hybrid Satellite-Terrestrial Relay Network: Proposed Model and Application of Power Splitting Multiple Access

Fair Energy-Efficient Resource Allocation for Downlink NOMA Heterogeneous Networks

Efficient Modulation Scheme for Intermediate Relay-Aided IoT Networks

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