MESH NETWORK SIMULATION by Pei Ping, Yury N. Petrenko

“…The paper investigates a message transfer in wireless mesh network simulation and how does it works in cellular network simulation. Finally the experimental result gave us the information that mesh networks have different principle in transmission way with cellular networks in transmission, and multi – hop routing could provide robustness and load balancing to communication in wireless mesh networks.…”
Get full text

Multi-Way Relaying Techniques for Heterogeneous Cooperative Wireless Network: From Theory to Practice by Wei Chen, Ke Ke, Yanping Yang, Ou Li

“…More specifically, based on WLAN and cellular networks, the effective integration and key technologies of the scene problems were investigated, then some possible solutions, with the purpose of meeting the indoor high data rate requirements and the outdoor high mobility requirements, so as to cost-effectively improve the quality of the user experience, were put forward.…”
Get full text

D2D data collaboration forwarding mechanism based on contract theory by Jin ZHOU, Luyang ZHANG, Peng YANG

“…A contract theory-based D2D data forwarding mechanism was proposed for device-to-device (D2D) communications under cellular networks.Firstly,considering the selfishness of users,a model of principal-agent was constructed,which regarded the transmitter user as principal and the idle user as agent.Then,the utility function of the contract was used to construct the optimization problem with the constraint condition.Meanwhile,the utility function of the two sides was converted into the satisfaction degree of the two sides of the contract.Finally,the stable matching with the minimum weight was constructed to obtain the optimal contract solution.The simulation results show that the proposed mechanism can better encourage the idle user to participate in collaborative communication so as to enhance the user’s degree of satisfaction and throughput.…”
Get full text

MIMO OTA performance testing of vehicles by Lei LI, Guiming WEI, Guokai JIANG, Jiaxu FENG, Xiang WU

“…Intelligent traffic system is one of promising technologies for traffic industry.Based on communication among cars, pedestrian, traffic infrastructure and cellular networks, it’s able to significantly promote on road safety and efficiency by making proper traffic instructions.How to precisely evaluate the communication performance of a whole vehicle become a hot-topic in the field.Unfortunately, there is still no solution about the setup and procedures for the OTA testing.A low-cost solution was proposed by reconstructing channel models and optimizing the existing testing system framework that referred to as multi-probe anechoic chamber.The proposed method was able to multiple the test area with limited channel emulator RF channels by introducing a low-cost digital converter.Numerical simulations indicate that the proposed method has the ability to reproduce spatial and temporal correlation features of the target channel model, which is coherent with related standards’ requirements.…”
Get full text

Energy consumption analysis for WLAN discovery schemes in converged networks by JIANG Jun-feng, CAO Zhi-gang

“…The terminal energy consumption of WLAN discovery schemes was considered for wireless heterogeneous networks, which were the integration of 3GPP （third generation partnership project） cellular networks and WLAN （wire- less local area network）. …”
Get full text

Heterogeneous Cloud Radio Access Networks：Principle，Architecture，Techniques and Challenges by Mugen Peng, Yuan Ai

“…To mitigate the severe inter-tier interference and enhance limited cooperative gains resulting from the constrained and non-ideal transmissions between adjacent base stations in heterogeneous networks（HetNet），and solve the emerging problems including the complex delivery of control signaling and difficult convergence with the existing mobile cellular networks in cloud radio access networks（C-RAN），heterogeneous cloud radio access networks （H-CRAN）were proposed as the promising solution for the fifth generation radio access network. …”
Get full text

Full-duplex device-to-device communications:key technologies and prospects by Jiaxin DING, Daquan FENG, Gongbin QIAN, Nan ZHANG

“…Due to the physical proximity,D2D communications can bring proximity gain,reusing gain and hop gain,and thus can potentially increase system spectral-efficiency and energy-efficiency.Full-duplex D2D communications,which enable the transceiver to simultaneously transmit and receive in the same band,can further improve the system performance.Therefore,full-duplex D2D communications has being considered as one of the key techniques in the next generation cellular networks.The features of full-duplex D2D communications and the significance in 5G systems were briefly introduced as well as its applications.Then,the state-of-art research on full-duplex D2D resource allocation was presented and discussed.Finally,some research topics that deserve further study was outlined and concluded.…”
Get full text

Dynamic power control scheme based on fractional frequency reuse for D2D communication by Xianchao WANG, Fan JIANG, Changyin SUN, Chenbi LI, Binyan SHEN

“…By reusing the resource of existing cellular users,D2D (device-to-device)communication underlaying cellular network can improve the spectrum utilization rate and reduce the power consumption of mobile terminals.However,it will bring interference to the existing cellular networks.In order to ensure the quality of service of D2D users and cellular users,the power control and resource allocation scheme for D2D communication underlaying cellular communications was studied.Specifically,fractional frequency reuse was introduced to achieve the resource partitioning and resource reuse between cellular users and D2D users.Based on the principle of maximizing the throughput of the whole system,the optimization objective was established.Combined with the fractional power control and introduction of interference limits,a dynamic power control strategy was proposed.Simulation results show that the proposed scheme improves the performance of the overall system.…”
Get full text

A genetic algorithm based method of optimizing dispersion matrix for RDSM system by Peng ZHANG, Xiaoping JIN, Dongxiao CHEN

“…Rectangular differential spatial modulation (RDSM) is a multi-antenna incoherent modulation technology with high spectral efficiency, low power consumption, and zero-overhead for channel estimation.RDSM is especially suitable for 6G communication systems, such as fast-moving Internet of vehicles, Internet of things, cellular networks, etc.However, the construction of the sparse rectangular unitary space-time dispersion matrix (DM) at transmitter is a problem.The proposed Genetic algorithm (GA) will result in less computational complexity than the currently used random research.The fitness of GA was calculated by the rank and determinant criterion (RDC) method to avoid discussions in differential system.Due to characteristics of constellation symbols of RDSM, the proposed method reduced the computational complexity during each single iteration in GA.The simulation results show that the optimized DMS can significantly improve the bit error rate (BER) performance of the RDSM system.Compared with random search, the low-complexity GA effectively improves the DMS optimization efficiency of RDSM.The computational complexity required for optimizing DMS is about 0.1% of random search optimization method.…”
Get full text

Green 5G ultra-dense wireless heterogeneous networks:guidelines,techniques,and challenges by Yuzhou LI, Tao JIANG, Yang CAO, Zan LI

“…Ultra-dense wireless heterogeneous network (Ud-HetNet) has been recognized as one of the most promising 5G network-organization techniques to significantly improve the wireless capacity and thus solve the 1 000× data challenge faced by cellular networks.However,counter to the expected 5G vision,although benefiting from the spectrum efficiency (SE) improvement,ultra-dense network deployment significantly increases system energy consumption and thus decreases network energy efficiency (EE).The key theories and techniques for energy-efficiently deploying Ud-HetNet were investigated from two aspects of macroscopic network matching and microscopic resource aggregation by exploiting their overall network management capabilities and network diversity effects.Specifically,the overall design guidelines for green evolution were introduced firstly,and then three techniques,namely load-aware base station on/off switching,proactive caching,and interference-aware cross-network resource allocation,were proposed to improve the network EE.Open issues and challenges that need to be further explored were also discussed.…”
Get full text

Energy efficiency optimization algorithm of heterogeneous networks based on hybrid energy supply and energy cooperation by Yang CAO, Ye ZHONG, Chunling PENG, Xiaofeng PENG

“…To reduce the base station energy consumption and co-channel interference in heterogeneous cellular networks, a joint optimization algorithm combined with energy harvesting and energy cooperation was proposed with the objective of energy efficiency optimization.First, a mixed-integer nonlinear programming problem for joint resource allocation was constructed considering the constraints of user service quality, the constraints of cellular base station power, and the constraints of renewable energy harvesting.Second, considering that the problem was an NP-hard problem which was difficult to solve directly, the complex original problem was decomposed into three subproblems, such as user association, power allocation, and energy cooperation, with the fixed-variable method, which were solved by using the Lagrangian pairwise method, particle swarm optimization algorithm, and matching theory, respectively.Finally, the final solution of the original problem was obtained by combining the above three algorithms through convergent iterative algorithms.The simulation results show that the proposed algorithm has improved convergence and system energy efficiency compared with the comparison algorithm.…”
Get full text

5G-Advanced E2E deterministic transmission analysis and system design by Haiyang SUN, Yi SHI, Yan LI, Qiang FAN, Xin MA

“…Because of the advantages of flexible deployment, low cable cost, strong support for mobility and comprehensive QoS control and high scalability, cellular networks had been widely used in factory scenarios.At the same time, the deterministic service in the factory also puts forward certain requirements for cellular network control.Therefore, in discussions related to 5G-Advanced, the industry also proposes to research a 5G cellular network that supports ultra-low latency.To meet the delay requirement of 2 ms, two key technologies, deterministic N3 interface and cross-layer scheduling optimization were proposed to reduce the transmission or waiting delay on the transport network and air interface.These two technologies were the enhancement based on the current communication mechanism and network protocol between cellular network and deterministic network.The high delay requirement of deterministic services can be met well without changing the existing network protocol too much.…”
Get full text

Review of the Development of Low Earth Orbit Satellite Communication for Smart High-Speed Railway by Zhaoyang SU, Liu LIU, Jiachi ZHANG, Tao ZHOU, Wei LIN, Yiqun LIANG

“…Low-earth orbit satellites have the advantages of wide bandwidth, low latency, and large coverage, making them very suitable as a supplement to ground cellular networks.Low-earth orbit satellites can meet the requirements of smart high-speed railway full line coverage and seamless connection, which helps to build an integrated communication network between ground and space.Considered the shortcomings of the current railway mobile communication network, the application and key technologies of low earth orbit satellites in smart high-speed railway were studied.Firstly, the communication requirements of smart high-speed railway were analyzed, and then the development status of railway satellite communication at home and abroad were introduced.Finally, the key technologies and challenges of low earth orbit satellite application in the field of smart high-speed rail were discussed from the aspects of propagation characteristics, physical layer parameters, beam handover, and resource management.…”
Get full text

Non-orthogonal multiple access wireless energy harvesting cooperative system by Xiaoping JIN, Qing WU, Wenchao ZHAI, Jianrong BAO

“…Non-orthogonal multiple access (NOMA) has recently attracted wide attention as a promising multiple access technology adopted in 5G cellular networks.In order to improve the spectrum efficiency, coverage and anti-noise performance of NOMA technology, while reduce the energy consumption of the system, a simultaneous wireless information and power transfer (SWIPT) cooperative network uplink NOMA transmission system based on orthogonal index modulation multiple access (IMMA) technology was designed, hereafter was denoted as QIMMA-SWIPT.Specifically, the QIMMA system was formed by multiple remote users, and it improved the spectrum efficiency and anti-noise performance as well as expanded the communication coverage and reduced the energy consumption of the system by decoding and forwarding relay cooperative transmission with SWIPT technology.The theoretical upper bound of the average bit error rate of QIMMA-SWIPT was derived.Simulation and analysis demonstrate that, under the same spectrum efficiency, the bit error rate performance of the cooperative QIMMA-SWIPT system is better than that of the cooperative IMMA-SWIPT and SCMA-SWIPT systems.In addition, the effects of power cut factor and source-to-relay distance on bit error performance were also deeply analyzed.…”
Get full text

Birhythmicity and Hard Excitation from Coupled Synthetic Feedback Loops by Aimin Chen, Caixia Liu, Junwei Wang

“…Through bifurcation analysis on these two synthetic cellular networks, we analyze the function of network structure for the collapse and revival of birhythmicity and hard excitation with the variation of parameters. …”
Get full text

Cell on Wheels-Unmanned Aerial Vehicle System for Providing Wireless Coverage in Emergency Situations by Hazim Shakhatreh, Khaled Hayajneh, Khaled Bani-Hani, Ahmad Sawalmeh, Muhammad Anan

“…Due to natural disasters, unmanned aerial vehicles (UAVs) can be deployed as aerial wireless base stations when conventional cellular networks are out of service. They can also supplement the mobile ground station to provide wireless devices with improved coverage and faster data rates. …”
Get full text

Indoor Wi-Fi coverage measurement without spatial coordinates by XIE Zefeng, CHEN Weidong, HUANG Lixia, GU Yifan, ZHANG Bojun, QUAN Zhi

“…In R16, 3GPP proposed that user devices could utilize the 4G/5G cellular networks to report the received signal strength indicator (RSSI) of Wi-Fi signal based on the existing minimization of drive test (MDT) technology, making it possible to measure the coverage probability of indoor Wi-Fi networks. …”
Get full text

Novel Au-Based Solder Alloys: A Potential Answer for Electrical Packaging Problem by Jiachen Xu, Mingfang Wu, Juan Pu, Songbai Xue

“…With the development of electronical technology and the construction of the fifth-generation cellular networks, electronic devices with higher integrated level and power are widely applied. …”
Get full text

Localized Multistreams for P2P Streaming by Majed Alhaisoni, Mohammed Ghanbari, Antonio Liotta

“…Streaming video over the Internet, including cellular networks, has now become a commonplace. Network operators typically use multicasting or variants of multiple unicasting to deliver streams to the user terminal in a controlled fashion. …”
Get full text

Open-Source Telemedicine Platform for Wireless Medical Video Communication by A. Panayides, I. Eleftheriou, M. Pantziaris

“…Experimental results show that adequate diagnostic quality wireless medical video communications are realized using the designed telemedicine platform. HSPA cellular networks provide for ultrasound video transmission at the acquired resolution, while VFD algorithm utilization bridges objective and subjective ratings.…”
Get full text