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Load Balanced Coding Aware Multipath Routing for wireless Mesh networks

Chinese Journal of Electronics 2015年第1期24卷 8-12页

作者： SHAO Xing WANG Ruchuan HUANG Haiping SUN Lijuan College of Computer Nanjing University of Posts and Telecommunications College of Information Engneering Yancheng Institutue of Technology Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks Key Lab of Broadband Wireless Communication and Sensor Network Technology

The growth of network coding opportunities is considered the unique optimization goal by most current network coding based routing algorithms for wireless mesh networks. This usually results in flows aggregation problem in areas with coding opportunities, and degrades the network performance. This paper proposes a Load balanced coding aware multipath routing(LCMR)for wireless mesh networks. To facilitate the evaluation of discovered multiple paths and the tradeoffs between coding opportunity and load balancing, a novel routing metric, Load balanced coding aware routing metric(LCRM) is presented, which considers the load degree of nodes when detects coding opportunities. LCMR could spread traffic over multipath to further balance load. Simulation results demonstrate that LCMR could evenly spread the traffic over the network with increasing network throughput in a heavy load at the expense of some coding opportunities.

关键词： Load balanced Coding aware Multipath Routing wireless mesh networks.

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Secure P2P topology based on a multidimensional DHT space mapping

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Science China(Information Sciences) 2013年第5期56卷 224-237页

作者： SUN ZhiXin LUO BingQing CHEN YaDang BU Kai Key Laboratory of Broadband Wireless Communication and Sensor Network Technology(Nanjing University of Posts and Telecommunications) Ministry of Education State Key Laboratory for Novel Software Technology Nanjing University

Distributed search and routing algorithms based on the DHT(distributed hash table) protocol have attracted considerable attention in structured P2P(peer-to-peer) research as a result of favorable properties such as distribution,self-organization,and high *** with a traditional C/S(client/server) network,the probability of peers initiating malicious behavior increases dramatically because of their self-governing and dynamic characteristics,which also make it harder to satisfy the peers’ security required by *** this paper,we propose a new secure DHT protocol based on a multidimensional mapping *** mechanism maps peers to a multidimensional space by dividing the identifiers into ***,a series of secure methods and routing algorithms are provided to achieve secure DHT in smaller *** with state-ofthe-art approaches,the theoretical analysis and experimental results show that the multidimensional mapping mechanism can effectively improve the average success rate of a resource search by inhibiting malicious behavior.

关键词： multidimensional mapping DHT(distributed hash table) structured P2P(peer-to-peer) network routing attack security

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Impact of MAC frame length on energy efficiency in 6LowPAN

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The Journal of China Universities of Posts and Telecommunications 2013年第4期20卷 67-72页

作者： CHEN Shou-ning YANG Long-xiang ZHAO Yu-juan LI Jing Key Laboratory of Broadband Wireless Communication and Sensor Network Technology Ministry of Education Nanjing University of Posts and Telecommunications Jiangsu Mobile Communication Company Limited Nanjing Branch

To reach necessary end-to-end connectivity between the Internet and wireless sensor networks （WSNs）, the Internet Engineering Task Force （IETF） IPv6 over low power wireless personal area network （6LowPAN） working group has been established and introduced an adaptation layer for integration of IEEE 802.15.4 physical layer/media access control （PHY/MAC） layers and the upper layers of any Intemet protocol （IP）-based networks, such as the Internet. The energy efficiency is one of the most important performance measures in WSNs because most sensor nodes are only battery powered so we should reduce the energy consumption to the lowest to extend the life of nodes. Therefore the determination of MAC frame length should be carefully considered since that the radio frequency （RF） module consumes most the energy of a sensor node meanwhile the MAC protocol is the direct controller of RF module. In this paper, we provide a star-shaped 6LowPAN non-beacon mode with unslotted carrier sense multiple access with collision avoidance （CSMA/CA） mechanism to access to the channel and model the stochastic behavior of a target end node as the M/G/1 queuing system. Analytical expressions for some parameters such as channel busy probability, packet loss probability and energy efficiency are obtained in this paper and our analytical results can clearly show the impact of MAC frame length on the energy efficiency of a target node in both ideal and lossy channel.

关键词： 6LowPAN IEEE 802.15.4 unslotted CSMA/CA M/G/1 queuing system MAC frame length energy efficiency

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T-QoS-aware based parallel ant colony algorithm for services composition

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Journal of Systems Engineering and Electronics 2015年第5期26卷 1100-1106页

作者： Lin Zhang Kaili Rao Ruchuan Wang College of Computer Nanjing University of Posts and Telecommunications Institute of Computer Technology Nanjing University of Posts and Telecommunications Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks Key Lab of Broadband Wireless Communication and Sensor Network Technology Nangjing University of Posts and Telecommunications

In order to make cloud users get credible, high-quality composition of services, the trust quality of service aware(TQoS-aware) based parallel ant colony algorithm is proposed. Our approach takes the service credibility as the weight of the quality of service, then calculates the trust service quality T-QoS for each service, making the service composition situated in a credible environment. Through the establishment on a per-service T-QoS initialization pheromone matrix, we can reduce the colony’s initial search time. By modifying the pheromone updating rules and introducing two ant colonies to search from different angles in parallel,we can avoid falling into the local optimal solution, and quickly find the optimal combination of global solutions. Experiments show that our approach can combine high-quality services and the improvement of the operational success rate. Also, the convergence rate and the accuracy of optimal combination are improved.

关键词： services composition trust service quality ant colony algorithm parallel

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Outage performance analysis in cognitive wireless relay networks

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Research Journal of Applied Sciences, Engineering and technology 2012年第20期4卷 3958-3964页

作者： Yue, Wenjing Chen, Zhi Wang, Anyi Hu, Luoquan Wang, Lei Key Lab of Broadband Wireless Communication and Sensor Network Technology Nanjing University of Posts and Telecommunication Nanjng China

The analysis the outage performance of suggested Cognitive wireless Relay network (CWRN) which consists of a source, a destination and M cognitive relay nodes and M primary user nodes. In this study, we mainly study that the cognitive relay nodes impact on the outage performance of proposed CWRN over Rayleigh channels under both the peak and average interference power constraints. Firstly, considering a scenario with a single cognitive relay node, the optimal power control policies of the cognitive relay nodes are derived in order to achieve the minimum system outage probability under different interference power constraints. Then, to further improve outage performance, a scenario with multi-relay is also studied. Finally, the numerical simulations are presented. Numerical results show that substantial performance improves with the increase of the number of cognitive relay nodes and the power control policy under the average interference power constraint is more effective than that under the peak interference power constraint. © Maxwell Scientific Organization, 2012.

关键词： Cognitive radio

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Consequent entanglement concentration of a less-entangled electronic cluster state with controlled-not gates

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Chinese Physics B 2014年第5期23卷 91-95页

作者：周澜 College of Mathematics & Physics Nanjing University of Posts and Telecommunications Key Laboratory of Broadband Wireless Communication and Sensor Network Technology of the Ministry of Education Nanjing University of Posts and Telecommunications

We present a highly efficient entanglement concentration protocol （ECP） for a four-electron system in a less-entangled cluster state. In this ECP, we only require one pair of less-entangled electron cluster states and one ancillary electron to complete the task. With the help of the controlled-not （CNOT） gate, the concentrated maximally entangled state can be retained for further application with some success probability. On the other hand, the discarded items can be reused to obtain a high success probability. All the features make this ECP useful in the current quantum information field.

关键词： quantum communication entanglement entanglement concentration

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Distributed secure quantum machine learning

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Science Bulletin 2017年第14期62卷 1025-1029页

作者： Yu-Bo Sheng Lan Zhou Key Laboratory of Broadband Wireless Communication and Sensor Network Technology Nanjing University of Posts and Telecommunications Ministry of Education College of Mathematics & Physics Nanjing University of Posts and Telecommunications

Distributed secure quantum machine learning （DSQML） enables a classical client with little quantum technology to delegate a remote quantum machine learning to the quantum server with the privacy data preserved. Moreover, DSQML can be extended to a more general case that the client does not have enough data, and resorts both the remote quantum server and remote databases to perform the secure machi~ learning. Here we propose a DSQML protocol that the client can classify two-dimensional vectors to dif- ferent clusters, resorting to a remote small-scale photon quantum computation processor. The protocol is secure without leaking any relevant information to the Eve. Any eavesdropper who attempts to intercept and disturb the learning process can be noticed. In principle, this protocol can be used to classify high dimensional vectors and may provide a new viewpoint and application for future ＂big data＂.

关键词： Quantum machine learning Quantum communication Quantum computation Big data

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A FGS enhancement layer coding algorithm for interested region

International Journal of Digital Content Technology and its ...

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International Journal of Digital Content technology and its Applications 2012年第19期6卷 145-151页

作者： Zhang, Deng-Yin Wen, Jun Wang, Zhou-Yang Key Lab of Broadband Wireless Communication and Sensor Network Technology Nanjing University of Posts and Telecommunications Nanjing China

In order to ensure the visual quality and the objective quality of video under low bandwidth, this paper presents a FGS enhancement layer coding algorithm for interested region. First, this paper introduces the traditional FGS enhancement layer coding and analyzes the exist problems. Then, proposes the main steps and description of the FGS enhancement layer coding algorithm for interested region. Finally, this paper shows the effectiveness of the algorithm through experimental results.

关键词： Codes (symbols)

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Differential reprogramming based on constructive interference for wireless sensor network

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Journal of Computational and Theoretical Nanoscience 2016年第9期13卷 6161-6166页

作者： Hu, Bing Sun, Zhixin Key Laboratory of Broadband Wireless Communication and Sensor Network Technology Nanjing University of Posts and Telecommunications Ministry of Education Nanjing210003 China

To improve the performance of reprogramming in wireless sensor network, we present a novel reprogramming structure and constructive interference-based dissemination protocol (CIDP) to transmit the patch throughout the network fast and reliability. CIDP disseminates the patch, which is divided into several packets, to the network exploiting constructive interference. We evaluate our implementation of CIDP using simulation under different number of nodes. Our results show that CIDP disseminates the patch less than 4 milliseconds. In general, the probability of a node receives the complete patch as high as 99.99%. Copyright © 2016 American Scientific Publishers. All rights reserved.

关键词： sensor nodes

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A new side information estimate based Distributed Video Coding algorithm for wireless multimedia sensor networks

引用

International Journal of Advancements in Computing technology 2012年第1期4卷 320-326页

作者： Xiao, Fu Liu, Jinkai Sun, Lijuan Wang, Ruchuan Nanjing University of Posts and Telecommunications China Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks China Key Lab of Broadband Wireless Communication and Sensor Network Technology Ministry of Education China

Video compression can reduce the amount of data information for wireless multimedia sensor networks(WMSNs). Compared with the traditional video coding algorithms, big gap existed in coding performance for Distributed Video Coding (DVC). In order to improve the efficiency of side information estimation, a novel hash-based side information estimation algorithm is proposed in this paper. For the regions of the Wyner-Ziv frame which cannot coding and decoding accurately, Discrete Cosine Transform (DCT) low-frequency coefficients of DCT is extracted according to the criteria of ROI for entropy coding. Then decoded DCT low-frequency coefficients for bidirectional hash motion estimation is utilized by decoder, which enables the decoder to choose between past and future reference frames for frame interpolation to generate best side information. Experimental results show that our proposed algorithm can gain more accurate motion estimation in the intense motion region. The algorithm can also reduce the rate, improve the quality of decoded image, and decrease the energy consumption of sensor nodes ultimately, which is important for WMSNs.

关键词： Discrete cosine transforms

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