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2011 International Conference on Information technology, Computer Engineering and Management Sciences, ICM 2011

作者： Zhang, Dengyin Li, Dacheng Wang, Ye Key Lab. of Broadband Wireless Communication and Sensor Network Technology Nanjing University of Posts and Telecommunications Ministry of Education Nanjing 210003 China

ISBN: (纸本)9780769545226

In order to solve the controllability problem of worm attack range and effect in network counterwork and achieve the precise attack on the target host, we propose a propagation control method based on lifetime and a damage control method based on atomic attack. Based on these, we design a kind of CWS (controlled-worm system) and implement the prototype system in the LAN. Implementation results show that CWS can not only control the survival time but also carry out targeted attacks on controlled hosts. Comparing with traditional controlled worms, the worm controlled by the CWS can attack targeted hosts with a certain degree of covertness and pertinence. © 2011 IEEE.

关键词： Atomic attack Attack control Controlled worm Propagation control survival time hosts

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A handoff control algorithm based on services-priority and channel reservation

A handoff control algorithm based on services-priority and c...

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2011 International Conference on Information technology, Computer Engineering and Management Sciences, ICM 2011

作者： Zhang, Deng-Yin Cui, Lei Tong, Zhen-Yan Key Lab. of Broadband Wireless Communication and Sensor Network Technology Nanjing University of Posts and Telecommunications Ministry of Education Nanjing 210003 China

ISBN: (纸本)9780769545226

For some existing handoff control algorithms in Aerospace Information network, the success rate of their handoff calls is not high. This paper proposes a handoff control algorithm based on service priorities and channel reservation. The services are divided into different priorities, and reserve different number of channels for different businesses according to their priorities. Besides, the algorithm allows the emergency services to seize the channel resources. Simulation results show that when comparing with the traditional handoff algorithms, the algorithm we proposed can reduce the handoff failure rate. And ensure the handoff performance of emergency users. © 2011 IEEE.

关键词： Emergency services

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Novel self-renewal Hash chain based on Ito-Saito-Nishizeki secret sharing scheme

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Journal of China Universities of Posts and Telecommunications 2012年第SUPPL. 2期19卷 122-127页

作者： Dai, Ting Huang, Hai-Ping Wang, Ru-Chuan Pan, Xin-Xing College of Computer Nanjing University of Posts and Telecommunications Nanjing 210003 China Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks Nanjing 210003 China Key Laboratory of Broadband Wireless Communication and Sensor Network Technology Ministry of Education Nanjing University of Posts and Telecommunications Nanjing 210003 China

Hash chain mechanism has been widely used into a variety of encryption applications and services. The introduction of renewable Hash chain overcomes resource-constrained defect in traditional Hash chains, but many current renewable schemes still hold unsatisfactory performance especially on security and complexity. This paper proposed a novel self-renewable Hash chain construction scheme based on Ito-Saito-Nishizeki secret sharing scheme (SSS). It has proved that the proposed Hash chain scheme has higher security and less consumption of communication, computation and memory than the typical schemes proposed in the existing literatures. © 2012 The Journal of China Universities of Posts and Telecommunications.

关键词： Cryptography

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A multi-path transmission algorithm for Layered scalable coding

A multi-path transmission algorithm for Layered scalable cod...

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2011 International Conference on wireless communications and Signal Processing, WCSP 2011

作者： Zhang, Deng-Yin Wen, Jun Siyuan, Lin Key Lab. of Broadband Wireless Communication and Sensor Network Technology Nanjing University of Posts and Telecommunications Ministry of Education Nanjing 210003 China

ISBN: (纸本)9781457710100

wireless Multimedia sensor network (WMSN) need to transfer large amounts of video streaming data, how to achieve efficient and reliable transmission becomes a research hotspot. Layered scalable coding techniques can reduce the amount of data to improve channel efficiency. The multi-path transmission technology can balance the network load to fully utilize network resources. This paper presents a multi-path transmission algorithm for Layered scalable coding. First, the source node divides the video source sequence into base layer and enhancement layers through scalable video coding. Second, the energy delay gradient and delay gradient are set up for each sensor node. Last, multiple paths with different service quality are set up according to node gradient, so that it can adapt to the transmission needs of different stream layers. Simulation results show that the algorithm has good bandwidth adaptation and can better meet the business requirements of different users. ©2011 IEEE.

关键词： Scalable video coding

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Cross-Modal Graph Semantic communication Assisted by Generative AI in the Metaverse for 6G

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Research 2024年第2期2024卷 19-27页

作者： Mingkai Chen Minghao Liu Congyan Wang Xingnuo Song Zhe Zhang Yannan Xie Lei Wang Key Laboratory of Broadband Wireless Communication and Sensor Network Technology Nanjing University of Posts and TelecommunicationsNanjng 210003China State Key Laboratory of Organic Electronics and Information Displays&Institute of Advanced Materials(IAM) Nanjing University of Posts and TelecommunicationsNanjing 210023China

Recently, the development of the Metaverse has become a frontier spotlight, which is an important demonstration of the integration innovation of advanced technologies in the Internet. Moreover, artificial intelligence (AI) and 6G communications will be widely used in our daily lives. However, the effective interactions with the representations of multimodal data among users via 6G communications is the main challenge in the Metaverse. In this work, we introduce an intelligent cross-modal graph semantic communication approach based on generative AI and 3-dimensional (3D) point clouds to improve the diversity of multimodal representations in the Metaverse. Using a graph neural network, multimodal data can be recorded by key semantic features related to the real scenarios. Then, we compress the semantic features using a graph transformer encoder at the transmitter, which can extract the semantic representations through the cross-modal attention mechanisms. Next, we leverage a graph semantic validation mechanism to guarantee the exactness of the overall data at the receiver. Furthermore, we adopt generative AI to regenerate multimodal data in virtual scenarios. Simultaneously, a novel 3D generative reconstruction network is constructed from the 3D point clouds, which can transfer the data from images to 3D models, and we infer the multimodal data into the 3D models to increase realism in virtual scenarios. Finally, the experiment results demonstrate that cross-modal graph semantic communication, assisted by generative AI, has substantial potential for enhancing user interactions in the 6G communications and Metaverse.

关键词： modal frontier guarantee

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Quality-Aware Massive Content Delivery in Digital Twin-Enabled Edge networks

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China communications 2023年第2期20卷 1-13页

作者： Yun Gao Junqi Liao Xin Wei Liang Zhou School of Communications and Information Engineering Nanjing University of Posts and TelecommunicationsNanjing 210003China Key Laboratory of Broadband Wireless Communication and Sensor Network Technology Ministry of EducationNanjing University of Posts and TelecommunicationsNanjing 210003China

Massive content delivery will become one of the most prominent tasks of future B5G/6G ***,various multimedia applications possess huge differences in terms of object oriented(i.e.,machine or user)and corresponding quality evaluation metric,which will significantly impact the design of encoding or decoding within content delivery *** get over this dilemma,we firstly integrate the digital twin into the edge networks to accurately and timely capture Quality-of-Decision(QoD)or Quality-of-Experience(QoE)for the guidance of content ***,in terms of machinecentric communication,a QoD-driven compression mechanism is designed for video analytics via temporally lightweight frame classification and spatially uneven quality assignment,which can achieve a balance among decision-making,delivered content,and encoding ***,in terms of user-centric communication,by fully leveraging haptic physical properties and semantic correlations of heterogeneous streams,we develop a QoE-driven video enhancement scheme to supply high data *** results demonstrate the remarkable performance improvement of massive content delivery.

关键词： content delivery digital twin edge networks QoD QoE

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An adaptive cross-layer mechanism of multi-channel multi-interface wireless networks for real-time video streaming

An adaptive cross-layer mechanism of multi-channel multi-int...

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International Conference on Autonomic and Trusted Computing

作者： Liu, Jian Li, Fangmin Dou, Fei He, Xu Luo, Zhigang Xiong, Hong Hubei Key Laboratory of Broadband Wireless Communication and Sensor Network School of Information Engineering Wuhan University of Technology Wuhan China

ISBN: (纸本)9780769542720

Real-time video streaming over wireless links imposes strong demands on video codecs and quality of networks. Many measures are made to design proper routing protocols and channel assignments (CAs) for multi-channel multi-interface (MCMI) wireless networks, since it can provide higher performance than single channel. However, there still has not been a well-studied proposal to guarantee real-time video quality in this situation. Hence, it motivates us to explore the potential synergies of exchanging information between different layers to support real-time video streaming over MCMI wireless networks. In this article we jointly consider three layers of the protocol stack: the application, data link and physical layers, and propose an adaptive cross-layer mechanism for real-time video streaming (ACMRV) used in this scenario, which includes both an efficient CA and an adaptive FEC mechanism. We analyze the performance of the proposed architecture and extensively evaluate it via NS-2. The results show that the real-time video quality can be greatly improved by our proposal. © 2010 IEEE.

关键词： Video streaming

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QoE-Driven Distributed Content Segments Sharing with Service Differentiation in D2D network 16

QoE-Driven Distributed Content Segments Sharing with Service...

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16th IEEE International wireless communications and Mobile Computing Conference, IWCMC 2020

作者： Song, Yiming Chen, Mingkai Wei, Xin Qi, Ting Zhang, Xuguang Key Laboratory of Broadband Wireless Communication and Sensor Network Technology Ministry of Education Nanjing University of Posts and Telecommunications Nanjing China

ISBN: (纸本)9781728131290

Content sharing via device to device (D2D) communication is considered as a promising method to improve the performance of cellular network. However, in D2D networks, the placement of multimedia content is still an complex and urgent issue. Hence, it is significant to figure out a fine-grained content collaboration placement and delivery strategy in D2D networks. For the efficient utilization of the storage and downloading capacity of user devices, we introduce a distributed content segment sharing strategy. In order to improve QoE with limited network resource, such strategy provides users multimedia service with differentiated quality. Then, we formulate QoE-driven D2D content segment placement with service differentiation as a submodular maximization problem, and a polynomial time algorithm is proposed. Simulation results shows that proposed algorithm outperforms the algorithms without distributed content segments sharing mechanism in terms of QoE. It also demonstrates that proposed algorithm has better on the performance of cache content diversity and fairness. © 2020 IEEE.

关键词： Polynomial approximation

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Trust evaluation in cloud manufacturing environment

Trust evaluation in cloud manufacturing environment

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19th International Conference on Industrial Engineering and Engineering Management: Engineering Economics Management

作者： Gao, Lu Liu, Quan Lou, Ping Hubei Key Laboratory of Broadband Wireless Communication Sensor Network School of Information Engineering Wuhan University of Technology Wuhan China

ISBN: (纸本)9783642384417

As a new manufacturing paradigm, cloud manufacturing transforms the traditional manufacturing business model, in which distributed resources belonged to different enterprises are encapsulated into cloud services. Clients can use cloud services according to their requirements, viz., clients can build up their own ondemand production service networks. However, it is quite difficult for clients to select reliable and high-quality service nodes to organize the production service network because of the existence of malicious, fake, untrue, and dynamic service nodes in the cloud manufacturing environment. The trustworthy cloud manufacturing environment is a prerequisite to implementation of cloud manufacturing. The reliable evaluation for trust works as a compass for building the trustworthy cloud manufacturing environment. In this paper, the trust measurement is discussed in cloud manufacturing environment and the trustworthy environment will be built up with this evaluation mechanism. © Springer-Verlag Berlin Heidelberg 2013.

关键词： Web services

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An improvement of AODV protocol based on reliable delivery in mobile ad hoc networks

An improvement of AODV protocol based on reliable delivery i...

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5th International Conference on Information Assurance and Security, IAS 2009

作者： Liu, Jian Li, Fang-Min Hubei Key Laboratory of Broadband Wireless Communication and Sensor Network School of Information Engineering Wuhan University of Technology Wuhan China

ISBN: (纸本)9780769537443

AODV protocol is a comparatively mature on-demand routing protocol in mobile ad hoc networks. However, the traditional AODV protocol seems less than satisfactory in terms of delivery reliability. This paper presents an AODV with reliable delivery (AODV-RD), a link failure fore-warning mechanism, metric of alternate node in order to better select, and also repairing action after primary route breaks basis of AODV-BR. Performance comparison of AODV-RD with AODV-BR and traditional AODV using ns-2 simulations shows that AODV-RD significantly increases packet delivery ratio(PDR). AODV-RD has a much shorter end-to-end delay than AODV-BR. It both optimizes the network performance and guarantees the communication quality. © 2009 IEEE.

关键词： Mobile ad hoc networks

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