Pengfei Wang

Henan University of Science and Technology

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i-10 index

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Co-Authors

Lingyang Song

Peking University

Boya Di

Peking University

Hongliang Zhang

Peking University

Zijie Zheng

Westlake University

Kaigui Bian

Peking University

Libing Sun

Suzhou Municipal Hospital

Jinlong Lin

The University of Texas Southwestern Medical Center

Chao Yao

Princeton University

Zhilin Yao

Jilin Province Science and Technology Department

Haina Ye

China United Network Communications Group (China)

Cooperative Institutions

Peking University

China United Network Communications Group (China)

Harbin Institute of Technology

Princeton University

Chinese Academy of Sciences

North China Electric Power University

Beijing University of Posts and Telecommunications

Henan University of Science and Technology

Nanjing University of Aeronautics and Astronautics

Queen Mary University of London

Author Statistics

Papers

Citation

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Research Field

HetMEC: Latency-Optimal Task Assignment and Resource Allocation for Heterogeneous Multi-Layer Mobile Edge Computing

IEEE Transactions on Wireless Communications (2019)

Pengfei Wang Zijie Zheng Boya Di Lingyang Song

Driven by great demands on low-latency services of the edge devices (EDs), mobile edge computing (MEC) has been proposed to enable the computing capacities at the edge of the radio access network. However, conventional MEC servers suffer some disadvantages such as limited computing capacity, preventing and computation-intensive tasks to be processed on time. To relief this issue, we propose the heterogeneous multi-layer MEC (HetMEC) where data that cannot be timely processed at the edge are allowed to be offloaded to the upper-layer MEC servers, and finally to the cloud center (CC) with more powerful computing capacity. We aim to minimize the system latency, i.e., the total computing and transmission time on all layers for the data generated by the EDs. We design the latency minimization algorithm by jointly coordinating the task assignment, computing, and transmission resources among the EDs, multi-layer MEC servers, and the CC. The simulation results indicate that our proposed algorithm can achieve a lower latency and higher processing rate than the conventional MEC scheme.

Mobile Edge Computing

10.1109/twc.2019.2931315

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Citations (102)

Platoon Cooperation in Cellular V2X Networks for 5G and Beyond

IEEE Transactions on Wireless Communications (2019)

Pengfei Wang Boya Di Hongliang Zhang Kaigui Bian Lingyang Song

In this paper, we study the platoon cooperation in the multi-lane cooperative platoon scenario, where platoons move cooperatively and communicate with each other by cellular vehicle-to-everything (V2X) communication. The platoon cooperation is important for the interference management and communication reliability enhancement, yet it is difficult, since the platoon formation, subchannel allocation, and power control of each platoon interact with each other and influence those of other platoons. To increase the number of vehicles in the platoon and reduce the power consumption, we propose a two-step resource allocation strategy in consideration of platoon formation, i.e., the resource allocation at the base station (BS) and within each platoon. A branch and bound algorithm is utilized for the resource allocation at the BS. We then design a distributed dynamic programming-based subchannel allocation and power control algorithm for the joint optimization of platoon formation, subchannel allocation, and power control. The simulation results evaluate the impact of the penalty factor and the latency requirement on the system performance.

10.1109/twc.2019.2919602

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Citations (114)

Robust and fast mapping based on direct methods

Pengfei Wang Chao Gao Wei Guo Mantian Li Fusheng Zha

Simultaneous localization and mapping technology is the key technology of robot. It's now still challenging due to huge computational cost, rapid motion, non-texture environment, illumination fluctuations, etc. In this paper, we propose a SLAM algorithm based on direct method similar to LSD SLAM. In our method, we adopt constant-velocity motion model to predict the camera pose of next frame and we demonstrate the model's function on avoiding tracking lost. Besides, we adopt inverse compositional method rather than forward additive method used by LSD SLAM to align image and experiments show that ours is more efficient. In addition, we optimize the map on Sim(3) to avoid scale-drift of monocular SLAM.

Monocular

Tracking (education)

10.1109/icarm.2017.8273229

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Citations (2)

Key nodes of the trust transitivity in social Internet of things

中国邮电高校学报(英文版) (2018)

Li Wenna Lin Zhiting Libing Sun Xiang Yaqin Pengfei Wang

10.19682/j.cnki.1005-8885.2018.1017

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Citations (2)

A 16-bit sigma–delta modulator applied in micro-machined inertial sensors

Journal of Semiconductors (2014)

Honglin Xu Qiang Fu Hongna Liu Liang Yin Pengfei Wang

A fourth-order low-distortion low-pass sigma–delta (ΣΔ) modulator is presented for micro-machined inertial sensors. The proposed single-loop single-bit feedback modulator is optimized with a feed-forward path to decrease the nonlinearities and power consumption. The IC is implemented in a standard 0.6 μm CMOS technology and operates at a sampling frequency of 3.846 MHz. The chip area is 2.12 mm2 with 23 pads. The experimental results indicate a signal-to-noise ratio (SNR) of 100 dB and dynamic range (DR) of 103 dB at an oversampling rate (OSR) of 128 with the input signal amplitude of −3.88 dBFS at 9.8 kHz; the power consumption is 15 mW at a 5 V supply.

Oversampling

Delta-sigma modulation

SIGNAL (programming language)

Distortion (music)

10.1088/1674-4926/35/4/045007

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Citations (1)

Cellular V2X Communications in Unlicensed Spectrum: Harmonious Coexistence With VANET in 5G Systems

IEEE Transactions on Wireless Communications (2018)

Pengfei Wang Boya Di Hongliang Zhang Kaigui Bian Lingyang Song

With the increasing demand for vehicular data transmission, limited dedicated cellular spectrum becomes a bottleneck to satisfying the requirements of all cellular vehicle-to-everything (V2X) users. To address this issue, unlicensed spectrum is considered to serve as the complement to support cellular V2X users. In this paper, we study the coexistence problem of cellular V2X users and vehicular ad hoc network (VANET) users over the unlicensed spectrum. To facilitate the coexistence, we design an energy sensing-based spectrum sharing scheme, where cellular V2X users are able to access the unlicensed channels fairly while reducing the data transmission collisions between cellular V2X and VANET users. In order to maximize the number of active cellular V2X users, we formulate the scheduling and resource allocation problem as a two-sided many-to-many matching with peer effects. We then propose a dynamic vehicle-resource matching algorithm and present the analytical results on the convergence time and computational complexity. Simulation results show that the proposed algorithm outperforms existing approaches in terms of the performance of the cellular V2X system when the unlicensed spectrum is utilized.

Frequency allocation

10.1109/twc.2018.2839183

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Citations (128)

Research on the optimal time buffer model of critical equipments in multi-models production

Liang Zhao Shen Chun-guang Pengfei Wang

Critical equipments mainly maintain critical production processes in the production system, deciding the production cycle and product quality directly, always the bottleneck of the production system. So we should set up a certain buffer to make the critical equipments work continually to avoid the output loss of the whole system even if the pre-processing is interrupted. This article takes the popular multi-models production as the research object, concerning the features of multi-models production and setting the mathematical models to solve the optimal time buffer. Besides concerning the production system structural, this paper researches production system parameters of series system, parallel system and hybrid system. At last, the authors use the example of production line to illustrate the model and algorithm.

Production line

Production model

Production cycle

Buffer (optical fiber)

10.1109/gsis.2009.5408110

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Citations (0)

Research on Power Line Communication Technology of Energy Internet Based on Blockchain

IOP Conference Series Earth and Environmental Science (2021)

Fei Xia Pengfei Wang

Abstract Due to the gradual improvement of the energy Internet level, its requirements for the communication structure are also stricter. The key to the Energy Internet is the power structure control network. It integrates many distributed renewable energy sources, and meets the two-way intercommunication of energy and information by means of information and communication. Through the use of blockchain and smart contract technology in the Energy Internet to complete stable and automatic P2P energy transactions, it will be possible to optimize the work efficiency of the structure and optimize the cost. Power line communication technology generally covers power line carrier and industrial frequency communication technology. It is not necessary to build leased lines or collect public communication service fees, so that grid companies can make full use of their own resources. Based on the Internet and power line communication technology, this article discusses the dilemmas that need to be resolved in the construction of the energy Internet based on blockchain, so as to provide corresponding support for the optimization of heterogeneous networks in the future.

Power-line communication

10.1088/1755-1315/714/4/042085

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Citations (3)

Mega-Constellation Design for Integrated Satellite-Terrestrial Networks for Global Seamless Connectivity

IEEE Wireless Communications Letters (2022)

Pengfei Wang Boya Di Lingyang Song

In this letter, we study the integrated satellite-terrestrial network where users can access the core network by the backhaul links via both multi-layer satellites in the space and terrestrial access points on the ground. The mega-constellation design for such an integrated satellite-terrestrial network is investigated to realize the global seamless connectivity and provide high-rate backhaul transmission. First, we propose a theoretical framework for the average uplink capacity analysis. Second, based on the developed theoretical framework, we design a mega satellite constellation given the capacity of terrestrial backhaul links for realizing the global connectivity with the minimum satellite number. Simulation results show that as the terrestrial infrastructures are distributed more evenly in latitude, the designed mega-constellation first requires more satellites and then remains unchanged regardless of the terrestrial transmission capacity of high-latitude user terminals.

Backhaul (telecommunications)

Satellite constellation

Communications satellite

10.1109/lwc.2022.3171574

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Citations (15)

A Remote Attestation Security Model Based on Privacy-Preserving Blockchain for V2X

IEEE Access (2018)

Cheng Xu Hongzhe Liu Peifeng Li Pengfei Wang

The vehicle to everything (V2X) requires the real-time integration of all kinds of information on roads, pedestrians, the environment, and vehicles themselves. This information also needs to be shared with other vehicles. The effective integration of information and the strong privacy protection are the key restrictions on the development of the V2X. The previous privacy protection model has mainly focused on the centralized network, and there were problems with the centralized gateway and single-point decision, which were not suitable for the decentralized scenario. Therefore, this paper proposes a remote attestation security model based on a privacy-preserving blockchain. The overall model involves two core steps. First, the vehicle provides the network with an evidence of a credible identity and integrity. Secured, the vehicles in the network calculate the nodes to make their respective decisions, and the accounting nodes summarize the sub-conclusions, form the final results, and write them into data blocks. The analysis shows that it possesses the security features of decentralization, traceability, anonymity, irreplaceability, and high efficiency. The model framework, core block chain structure, and protocol process are described in detail. The experimental results based on a realistic infrastructure are presented. These experimental results demonstrate that our scheme can effectively enhance the security of the communications of intelligent vehicles in the V2X.

Traceability

Security Analysis

10.1109/access.2018.2878995

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Citations (50)