Performance analysis of joint pairing and mode selection in D2D communications with FD radios (original) (raw)

Analytical Framework for Joint Mode Selection and Power Allocation for Full Duplex D2D Network

2019 IEEE Wireless Communications and Networking Conference (WCNC)

In this paper, a simple and accurate analytical framework for the duplex mode selection and the power allocation scheme for full duplex (FD) device-to-device (D2D) communications underlaying wireless cellular network is proposed. We first aim at maximizing the D2D links rate by properly selecting the duplex mode of the D2D pairs and allocating the power of the users while fulfilling the quality-of-service (QoS) of the cellular users (CUEs). Since the resulting optimization problem is non-convex, we derive a first-order optimal solution by leveraging an interesting optimization tool named as sequential convex optimization theory. We also discuss how to obtain an efficient sub-optimal solution in term of complexity and accuracy by deriving the optimal power ratio between the D2D devices assuming an interference limited system. The simulations have shown more than 95% accuracy of the proposed approaches and provided great insights on the solution design parameters taking into account the CU location and the self-interference threshold.

Performance Analysis of Underlaid Full-Duplex D2D Cellular Networks

IEEE Access, 2019

This paper investigates the benefits of incorporating underlaid full-duplex (FD) device-todevice (D2D) communications into cellular networks. Toward this end, we provide an analytical performance characterization of underlaid D2D cellular networks where D2D users operate in FD mode under the presence of residual self-interference. In considered networks, the base-stations (BSs) are distributed according to a hexagonal grid, while the locations of cellular and D2D users follow Poisson point processes (PPPs). Based on the stochastic-geometry approach, we develop the approximations of key performance metrics including coverage probabilities and achievable sum-rates of both cellular and D2D links, and such approximations involve quickly commutable integrals. Under a special case in which the number of D2D links is sufficiently large, the obtained approximations can be simplified to closed-form expressions, allowing characterize the sum-rate behaviors under the effects of various system parameters. We show that underlaid D2D communications in cellular network can offer a significant spectral efficiency gain as compared to pure cellular transmission. With a sufficiently low self-interference cancellation level, FD D2D can offer substantial spectral efficiency improvement over the half-duplex (HD) counterpart. Finally, the resulting performance metrics are compared with multi-cell networks operating in standard and fractional frequency reuse modes, and observe that frequency reuse provides improved coverage probabilities of both cellular and D2D links, but substantially reduces the D2D sum-rate performance. INDEX TERMS Device-to-device communications, cellular networks, full-duplex, stochastic geometry. III. COVERAGE AND SUM-RATE ANALYSIS OF CELLULAR LINK

Spectral Efficiency Improvement of Full-Duplex D2D Communication in Cellular Networks

American Journal of Electromagnetics and Applications

Radio spectrum is becoming scarce due to increasing demand for high data rate, mobile communication and everexpanding population with diverse need to always stay interconnected. The cellular network providers and researchers in the academia are continually finding innovative ways to efficiently manage the existing telecommunication infrastructure and plan effective for future expansions and technology. Device to Device (D2D) communication, Full-Duplex (FD) radio, Heterogeneous network are a few of such innovative technologies developed to face the challenges. Device to device communication is one promising technology that is studied for deployment in future network technologies, however it is not without its challenges. Various researches have been carried out and are still being carried out to better understand and improve device to device capabilities. The use of full-duplex radios is an area of study with capability for improving device to device communication due to recent development in full-duplex radio although its major drawback is limited self-interference cancellation abilities to be deployed in large transmit power system. This research presents the practicality of deploying existing FD radios in device to device communication and simulate the amount of self-interference cancellation required using MATLAB for effective use with device to device. Two interference management schemes were implemented to improve the performance of FD-D2D communication, first power control scheme was developed to mitigate interference between D2D and base station in uplink resource sharing, Interference Limited Area (ILA) method was adapted to deal with interference between D2D and cellular user Uplink and Downlink transmission. The performance between 75dB to 110dB Self-Interference (SI) cancellation was carried out. The result was compared to conventional cellular and Half-Duplex D2D communication to estimate the improvement offered on spectral efficiency. The work has improved on achieving almost 100% spectral efficiency thereby improving the Quality of Service (QoS) for cellular network

Performance of a Cooperative Full-Duplex D2D Communication in Cellular Underlay

This paper investigates the performance of a non-orthogonal multiple access (NOMA) enabled full-duplex (FD) device-to-device (D2D) communication network that is underlaid in the cellular uplink. The uplink cellular user is licensed to serve the BS. For improving spectrum utilization efficiency, it also concurrently relays D2D information in FD mode. The transmit powers of D2D nodes are chosen such that the cumulative interference at the BS is below the Interference Temperature Limit (ITL). Using the statistical channel knowledge and successive interference cancellation at the D2D nodes, an expression for the D2D throughput is derived in closed-form. Thereafter, using the approximate throughput expressions, a closed-form expression of ITL apportioning parameter is derived in closed form that maximizes the D2D throughput while ensuring desired quality of service at the BS. Computer simulations demonstrate accuracy of the derived expressions.

Empirical models of the communications performance of Multi-hop Cellular Networks using D2D

can improve the quality of service, capacity and energy-efficiency of traditional infrastructure-centric single-hop cellular systems. MCN systems can exploit Device-to-Device (D2D) communications and utilize the communications and computing capabilities of mobile devices. However, the communications challenges resulting from the use of mobile devices and D2D communications require empirical solid evidences of their performance benefits, and the design of robust communications and networking protocols. In this context, this paper presents a unique set of empirical models of the communications performance of MCN systems that utilize D2D communications. The models take into account the impact of the distance, propagation/visibility conditions, number of hops, and communication settings. The set of derived models can help design, test and optimize communications and networking protocols for MCNs that utilize D2D communications. Keywords-Multi-hop cellular networks; device-to-device; D2D; mobile relays; empirical models; field trials; 5G; device-centric wireless networks. [1]. These forecasts have launched the race towards the design of 5G. Relevant efforts focus on the use of higher frequency bands, the dense deployment of small cells, and the design of advanced transmission technologies. These approaches build from traditional cell-centric architectures. An alternative is the emergence of device-centric wireless networks that exploit the intelligence, communications and computing resources of smart mobile devices . Device-centric wireless networks have been fostered by the identified benefits of Device to Device (D2D) communications that facilitate new value added services (including proximity based services), support critical public safety applications, help offload cellular traffic from the base stations, and increase the spatial frequency reuse and the capacity of cellular networks. Future device-centric wireless networks will enable mobile devices to provide wireless connectivity to other devices, and hence act as a bridge with the cellular infrastructure. The integration of cellular and ad-hoc or D2D communications is referred to as Multi-hop Cellular Networks (MCN). MCNs will transform mobile devices into prosumers of wireless connectivity in an underlay network that if efficiently coordinated with the cellular network has the potential for significant capacity, energy-efficiency and Quality of Service (QoS) benefits . 3GPP is already working on the design of D2D communications and proximity-based services . In this context, it is important noting that 3GPP considers cellular (e.g. LTE-Direct) and 802.11 technologies for D2D communications. 3GPP TR 22.803 also covers multi-hop cellular communications between a BS and an end-user using D2D communications and mobile users as relays ). Analytical and simulation studies have reported the benefits and advantages that MCN using D2D communications can provide over traditional cellular architectures in terms of capacity, coverage, infrastructure deployment cost, power saving and energy efficiency ([5], [6]). First experimental studies have recently demonstrated the gains achieved by MCNs using D2D communications with regards to end-user QoS and link quality when operating at large distances to the serving BS, in indoor environments, and under Non-Line-Of-Sight (NLOS) propagation conditions [3]. These gains result from the substitution of long-distance (and usually NLOS) single-hop cellular links by shorter distance (LOS) links with improved link budgets. Field tests have also demonstrated how MCNs using D2D communications can improve the end-user QoS in cell-overlaid or handover areas [7]. Field tests have provided very valuable data to evaluate and characterize the performance of MCNs using D2D communications. Field test measurements can also be used to derive models useful to the community. In this context, this study presents models of the communications performance achieved with MCNs that utilize D2D communications. The models take into account the impact of distance, propagation/visibility conditions, number of hops and communication settings. The proposed models can help design, test and optimize in analytical and simulation studies, novel communications and networking protocols tailored for MCNs. For example, the derived models could help design:  Techniques to integrate MCNs in heterogeneous wireless networks. Future cellular/wireless ecosystems will be characterized by the coexistence of multiple but complementary radio access technologies . Mechanisms are necessary to select the most adequate technology at each point in time. The inclusion of MCNs in heterogeneous wireless networks needs to take into account both their benefit (e.g. QoS, capacity, and energy-efficiency) and cost (e.g. communications overhead). In this

Full-Duplex or Half-Duplex D2D Mode? Closed Form Expression of the Optimal Power Allocation

2018 25th International Conference on Telecommunications (ICT), 2018

In this paper, we investigate and derive a closedform expression for the power allocation scheme of full duplex (FD) device to device (D2D) communications underlaying wireless cellular network. In this scenario, we consider the FD-D2D pair sharing the uplink resources of cellular users. We first derive a closed-form expression for the ergodic rate of the D2D link. Then we formulate the optimization problem which aims to maximize the D2D link rate while fulfilling the minimum QoS requirement of the cellular user. We further derive a closedform expression for the optimal power allocation strategy for both D2D and cellular users. The simulation results show the accuracy of the derived power allocation scheme and provide important insights on the separation distance between the D2D users and the interfering cellular user. In addition, the results provide important conditions to switch between FD and half duplex (HD) D2D modes.

Analytical Assessment of Coordinated Overlay D2D Communications

In this paper, analytical assessment of overlayinband device-to-device (D2D) communications is investigated, under cellular-network-assisted (coordinated) scheduling. To this end, a simple scheduling scheme is assumed that takes into account only local (per cell) topological information of the D2D links. Stochastic geometry tools are utilized in order to obtain analytical expressions for the interferers density as well as the D2D link signal-to-interference-ratio distribution. The analytical results accuracy is validated by comparison with simulations. In addition, the analytical expressions are employed for efficiently optimizing the parameters of a cellular system with overlay D2D communications. It is shown that coordinated scheduling of D2D transmissions enhances system performance both in terms of average user rate as well as maximum allowable D2D link distance.

Power-Spectrum Trading for Full-Duplex D2D Communications in Cellular Networks

IEEE Transactions on Green Communications and Networking, 2021

Device-to-device (D2D) communications allows two adjacent mobile terminals transmit signal directly without going through base stations, which has been considered as one of the key technologies for future mobile networks. As fullduplex (FD) communications can improve the performance (i.e., throughput, energy efficiency (EE)) of communications systems, it is commonly used in practical D2D communications scenarios. However, FD-enabled D2D communications also results in selfinterference. To fully realize the potential benefits of FD-enabled D2D communications, an effective resource allocation mechanism is critical to avoid not only the self-interference of FD-enabled D2D communications but also the interference between D2D users (DUs) and cellular users (CUs). In this paper, we investigate the resource allocation issue for FD-enabled DUs and traditional CUs. Considering the asymmetry of energy and spectrum resources of DUs and CUs, we propose a power-spectrum trading mechanism to achieve mutual benefits for both types of users. A concave-convex procedure algorithm is employed to solve the optimization problem of power allocation, and then a maximum weighted bipartite matching based method is proposed to select proper D2D pairs to maximize the overall system throughput. Numerical results show that the proposed scheme can remarkably improve the overall throughput and EE of FD-enabled D2D communications system.

Distance Based Cooperation Region for D2D Pair

2015 IEEE 81st Vehicular Technology Conference (VTC Spring), 2015

Device-to-device (D2D) communication is being considered an important traffic offloading mechanism for future cellular networks. Coupled with pro-active device caching, it offers huge potential for capacity and coverage enhancements. In order to ensure maximum capacity enhancement, number of nodes for direct communication needs to be identified. In this paper, we derive analytic expression that relates number of D2D nodes (i.e., D2D user density) and average coverage probability of reference D2D receiver. Using stochastic geometry and poisson point process, we introduce retention probability within cooperation region and shortest distance based selection criterion to precisely quantify interference due to D2D pairs in coverage area. The simulation setup and numerical evaluation validate the closed-form expression.

Intracell Interference Characterization and Cluster Interference for D2D Communication

IEEE Transactions on Vehicular Technology, 2018

The homogeneous spatial Poisson point process (SPPP) is widely used for spatial modeling of mobile terminals (MTs). This process is characterized by a homogeneous distribution, complete spatial independence, and constant intensity measure. However, it is intuitive to understand that the locations of MTs are neither homogeneous, due to inhomogeneous terrain, nor independent, due to homophilic relations. Moreover, the intensity is not constant, due to mobility. Therefore, assuming an SPPP for spatial modeling is too simplistic, especially for modeling realistic emerging device-centric frameworks such as device-to-device (D2D) communication. In this paper, assuming inhomogeneity, positive spatial correlation, and random intensity measure, we propose a doubly stochastic Poisson process, a generalization of the homogeneous SPPP, to model D2D communication. To this end, we assume a permanental Cox process (PCP) and propose a novel Euler-Characteristic-based approach to approximate the nearest-neighbor distribution function. We also propose a threshold and spatial distances from an excursion set of a chi-square random field as interference control parameters for different cluster sizes. The spatial distance of the clusters is incorporated into a Laplace functional of a PCP to analyze the average coverage probability of a cellular user. A closedform approximation of the spatial summary statistics is in good agreement with empirical results, and its comparison with an SPPP authenticates the correlation modeling of D2D nodes.