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network slicing based joint optimization of beamforming and resource selection scheme for energy efficient D2D networks

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Intelligent and Converged networks 2024年第3期5卷 248-264页

作者： Biroju Papachary Rajeev Arya Bhasker Dappuri Wireless Sensor networks Lab Department of Electronics&Communication EngineeringNational Institute of Technology PatnaPatna 800005India Department of Electronics and Communication Engineering CMR Engineering CollegeHyderabad 501401India

The integration of network slicing into a Device-to-Device(D2D)network is a promising technological approach for efficiently accommodating Enhanced Mobile Broadband(eMBB)and Ultra Reliable Low Latency Communication(URLLC)*** this work,we aim to optimize energy efficiency and resource allocation in a D2D underlay cellular network by jointly optimizing beamforming and Resource Sharing Unit(RSU)*** problem of our investigation involves a Mixed-Integer Nonlinear Program(MINLP).To solve the problem effectively,we utilize the concept of the Dinkelbach method,the iterative weightedℓ1-norm technique,and the principles of Difference of Convex(DC)*** simplify the solution,we merge these methods into a two-step process using Semi-Definite Relaxation(SDR)and Successive Convex Approximation(SCA).The integration of network slicing and the optimization of short packet transmission are the proposed strategies to enhance spectral efficiency and satisfy the demand for low-latency and high-data-rate requirement *** Simulation results validate that the proposed method outperforms the benchmark schemes,demonstrating higher throughput ranging from 11.79%to 28.67%for URLLC users,and 13.67%to 35.89%for eMBB users,respectively.

关键词： Ultra Reliable Low Latency Communication(URLLC) Enhanced Mobile Broadband(eMBB) heterogeneous cellular network device-to-device communication network slicing

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Uplink Performance Analysis in Multi-Tier heterogeneous cellular networks with Power Control and Biased User Association

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China Communications 2016年第12期13卷 25-36页

作者： Han Hu Hong Wang Qi Zhu Ziyu Pan Jiangsu Key Lab of Wireless Communications Key Lab on Wideband Wireless Communications and Sensor Network Technology of Ministry of EducationNanjing University of Posts and Telecommunications

A K-tier uplink heterogeneous cellular network is modelled and analysed by accounting for both truncated channel inversion power control and biased user association. Each user has a maximum transmit power constraint and transmits data when it has sufficient transmit power to perform channel inversion. With biased user association, each user is associated with a base station(BS) that provides the maximum received power weighted by a bias factor, but not their nearest BS. Stochastic geometry is used to evaluate the performances of the proposed system model in terms of the outage probability and ergodic rate for each tier as functions of the biased and power control parameters. Simulations validate our analytical derivations. Numerical results show that there exists a trade-off introduced by the power cut-off threshold and the maximum user transmit power constraint. When the maximum user transmit power becomes a binding constraint, the overall performance is independent of BS densities. In addition, we have shown that it is beneficial for the outage and rate performances by optimizing different network parameters such as the power cut-off threshold as well as the biased factors.

关键词： heterogeneous cellular network uplink performance biased user association stochastic geometry

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Joint user association and resource partition for downlink-uplink decoupling in multi-tier HetNets

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Frontiers of Information Technology & Electronic Engineering 2017年第6期18卷 817-829页

作者： Zhi-yong FENG Ze-bing FENG T.Aaron GULLIVER MOE Key Laboratory of Universal Wireless Communications Beijing University of Posts and Telecommunications Department of Electrical and Computer Engineering University of Victoria

Traditional cellular networks require the downlink (DL) and uplink (UL) of mobile users (MUs) to be associated with a single base station (BS). However, the power gap between BSs and MUs in different transmission environments results in the BS with the strongest downlink differing from the BS with the strongest uplink. In addition, the significant increase in the number of wireless machine type communication (MTC) devices accessing cellular networks has created a DL/UL traffic imbalance with higher traffic volume on the uplink. In this paper,a joint user association and resource partition framework for downlink-uplink decoupling (DUDe) is developed for a tiered heterogeneous cellular network (HCN). Different from the traditional association rules such as maximal received power and range extension, a coalition game based scheme is proposed for the optimal user association with DUDe. The stability and convergence of this scheme are proven and shown to converge to a Nash equilibrium at a geometric rate. Moreover, the DL and UL optimal bandwidth partition for BSs is derived based on user association considering fairness. Extensive simulation results demonstrate the effectiveness of the proposed scheme,which enhances the sum rate compared with other user association strategies.

关键词： Downlink-uplink decoupling User association Resource partition heterogeneous cellular network Coalition game

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