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Distributed multi-objective cross-layer optimization with joint hyperlink and transmission mode scheduling in network coding-based wireless networks

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AD HOC networkS 2016年第Part2期37卷 460-474页

作者： Liu, Jain-Shing Tsai, Jichiang Providence Univ Dept Comp Sci & Informat Engn Taichung Taiwan Natl Chung Hsing Univ Dept Elect Engn Taichung 40227 Taiwan Natl Chung Hsing Univ Grad Inst Commun Engn Taichung 40227 Taiwan

In this work, we address a cross-layer multi-objective optimization problem of maximizing network lifetime and optimizing aggregate system utility with intra-flow network coding, solved in a distributed manner. Based on the network utility maximization (NUM) framework, we resolve this problem to accommodate routing, scheduling, and stream control from different layers in the coded networks. Specially, we consider that there are two scheduling primitives, namely hyperlink and transmission mode, to be concurrently activated for the multi-objective optimization. Given the constraints with respect to these primitives, the optimization problem is specifically formulated as a quadratically constrained quadratic programming (QCQP) problem that is NP-hard in general, and its scheduling subproblem even when reduced to account for only one of these primitives is a maximum weighted independent set (MWIS) problem that is NP-hard already. To alleviate this complex problem in a distributed manner, we resort to alternate convex search (ACS) and primal decomposition (PD) to approximate the optimal results by using biconvex programming model and subgradient-based algorithm that can iteratively approach to the optimal solution. For the wireless multihop networks, wherein an optimal solution could be practically approximated as its validity would be out-of-date soon in the error-prone wireless environment, our simulation results show that the distributed method can fulfill our requirements, and can make a good trade-off on the heterogeneous objectives with well computational efficiency. (C) 2015 Elsevier B.V. All rights reserved.

关键词： Multi-objective Cross-layer optimization Distributed algorithm Joint scheduling network coding

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Efficient data uploading based on network coding in LTE-Advanced heterogeneous networks

Efficient data uploading based on network coding in LTE-Adva...

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International Conference on Advanced Communication Technology (ICACT)

作者： Phuc Chau Toan Duc Bui Yongwoo Lee Jitae Shin School of Electronic Electrical Engineering Sungkyunkwan University Suwon Rep. of Korea School of Electronic Electrical Engineering Sungkyunkwan University Jongno-gu Seoul KR

ISBN: (纸本)9781509048922

LTE-Advanced heterogeneous networks enable a uniform broadband experience to users flexibly anywhere in the network by using a mix of large and small cells - i.e., macro, pico, femto and relay stations. In this paper, we propose a novel network coding-based for mobile content uploading, where multiple user equipments upload their own content toward the eNodeB in LTE-Advanced relay networks. network coding has been considered as a promising solution in next generation networks because of the significant improvement in the transmission rate and reliability. The network coding enables an intermediate node having the capability of encoding incoming packets rather than simply forwarding. However, the advantages come at the cost of high computational, storage costs and coding vector overhead. The two former drawbacks can be solved easily by the fast development of current smart users and relay with high capability on computation and storage. The last issue of coding vector overhead still remains as many packets are encoded together using a linear combination since each packet needs to carry a large size of the header to store the information of the coding vector. We propose random overlapped chunked code for enhancing the transmission rate and reliability under the constraint of coding vector overhead. Furthermore, the encoding and decoding processes can be operated with low complexity. The complete transmission consists of two phases: users upload the content to the relay; the relay performs the proposed random overlapped chunked code of different coming streams from users and forwards the network-coded packets to the eNodeB. For performance evaluation, we run various simulations along with analysis to show that our proposal outperforms current schemes in terms of decoding probability.

关键词： Encoding network coding Decoding Receivers Relays Heterogeneous networks Complexity theory

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network coding and MPTCP in satellite networks

Network coding and MPTCP in satellite networks

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8th Advanced Satellite Multimedia Systems Conference and 14th Signal Processing for Space Communications Workshop, ASMS/SPSC 2016

作者： Giambene, Giovanni Luong, Doanh Kim Le, Van Anh Muhammad, Muhammad CNIT - Department of Information Engineering and Mathematical Sciences University of Siena Via Roma 56 Siena53100 Italy

ISBN: (纸本)9781509016822

Satellite networks are expected to support multimedia traffic flows, offering high capacity with QoS guarantees. This paper deals with Multipath-TCP (MPTCP), which exploits multiple TCP connections using different paths in order to improve user's throughput. In this study, MPTCP is combined with network coding to protect TCP transmissions from packet losses caused by ON/OFF channels in mobile satellite systems. A novel scheme, named Path-Based network coding for MPTCP (PBNC-MPTCP), has been proposed that applies Pseudo Random network coding (PRNC) to sub-flows, where the encoded packets of a block are sent on different paths in order to exploit path diversity. We have evaluated the PBNCMPTCP performance by means of Ns-2 simulations, showing that PBNC-MPTCP outperforms other schemes in the literature that combine MPTCP with network coding. © 2016 IEEE.

关键词： network coding

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A Light Weight Security Scheme for network coding Based on a Mobius Transformation

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INTERNATIONAL JOURNAL OF SECURITY AND ITS APPLICATIONS 2016年第3期10卷 161-172页

作者： Tadayon, M. H. Iran Telecommun Res Ctr ITRC Tehran Iran

network coding is a new method for forwarding network throughput in digital communication systems. In this paper, we introduce an efficient scheme for protecting the source data against wiretapper in linear network coding. The proposed scheme is implemented on the generated data packets in source node. We employ a well-known permutation function called Mobius transformation to transfer the existing data packet to an appropriate interchanged data packet. Then the new data packet can be sent to the intermediate nodes via output links of the source node in network securely. Indeed, the security of the proposed scheme against wiretapper is provided by employing Mobius transformation and interleaver operation on the generated data packet in source node. In the absence of cryptography systems, the proposed method is a light weight security scheme for network coding that can provide a security level easily.

关键词： network coding Mobius transformation Interleaver operation light weight security wiretapper

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Itinerary planning for mobile sinks in network-coding-based wireless sensor networks

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COMPUTER COMMUNICATIONS 2017年 111卷 1-13页

作者： Khalily-Dermany, M. Nadjafi-Arani, M. J. Islamic Azad Univ Khomein Branch Young Researchers & Elite Club Khomein Iran Mahallat Inistitute Higher Educ Fac Sci Mahallat Iran

Itinerary plan determines the order of locations that controllable-mobile sink(s) has to sojourn at them, where is a challenging issue especially for the resource constrained Wireless Sensor networks (WSNs). Despite of approved advantages for collecting sensed information by the mobile sink(s), itinerary planning may effect on other techniques, hence, it should be designed with considering impressible techniques such as network coding. This paper proposes an optimal itinerary plan for mobile sinks in the network-coding-based WSNs. Although this optimization can not be solved in polynomial time, but the mathematical formulation can help us estimate the problem characteristic and figure out the firmness of it. This optimization leads to less energy consumption and increases the lifetime of network-coding-based WSNs. Since, there exist restricted processing resources in WSNs, the optimal solving of this problem is impractical in large-scale WSNs and so, a genetic algorithm is proposed. Results illustrate that proposed genetic algorithm converges to the optimal solution with an appropriate accuracy in less execution time. Moreover, the simulation results demonstrate that proposed approaches have significantly lower energy consumption and consequently more lifetime in comparison with conventional ones where are not considered network coding. (C) 2017 Elsevier B.V. All rights reserved.

关键词： Wireless sensor network Optimization problem Lifetime Graph network coding

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Optical Physical-Layer Digital network coding for 2.5-Gb/s RoF-Based FiWi networks

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IEEE PHOTONICS TECHNOLOGY LETTERS 2016年第13期28卷 1442-1445页

作者： Vagionas, C. Mitsolidou, C. Tsiokos, D. Kalfas, G. Ramantas, K. Miliou, A. Pleros, N. Aristotle Univ Thessaloniki Dept Informat Thessaloniki 54124 Greece Iquadrat Informat Barcelona 08009 Spain

We demonstrate the first digital optical physicallayer network coding (OPNC) scheme for 2.5-Gb/s ON/OFF keyed (OOK) subcarrier modulated (SCM) signals suitable for the application in fiber-wireless networks. The proposed OPNC scheme employs all optical XOR logic gates that rely on cross-phase modulation-based Semiconductor Optical Amplifier (SOA) Mach-Zehnder interferometers to perform encoding and decoding operations. The proposed encoding and decoding scheme is targeting deployment at the central office and the clients site at the remote antenna units, respectively. Proof of concept verification is experimentally demonstrated for 2.5-Gb/s OOK-SCM data using a 10-GHz subcarrier. Both synchronous and asynchronous operations are evaluated, achieving error free operation.

关键词： Fiber wireless networks network coding radio over fiber semiconductor optical amplifier-Mach Zehnder interferometers cross phase modulation

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Efficient Cache Management for network-coding-Assisted Data Broadcast

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IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY 2017年第4期66卷 3361-3375页

作者： Chen, Jun Lee, Victor C. S. Liu, Kai Li, Jianjun Wuhan Univ Sch Informat Management Wuhan 430072 Peoples R China City Univ Hong Kong Dept Comp Sci Kowloon Hong Kong Peoples R China Chongqing Univ Coll Comp Sci Chongqing 400044 Peoples R China Huazhong Univ Sci & Technol Sch Comp Sci & Technol Wuhan 430074 Peoples R China

network coding has been proven to be an effective technique in improving the performance of data broadcast systems. Previous studies have shown that the performance of network-coding-assisted data broadcast systems is highly related to client cache contents. In this paper, we investigate the cache management problem in network-coding-assisted data broadcast environments with the objective of minimizing the overall response time. We formulate the problem and prove that it is NP-hard. Furthermore, we derive a probabilistic model to analyze the decoding probability to give insight into the importance of the cache management scheme. On this basis, we propose a decoding-oriented cache management scheme, which is called decoding-oriented least recently used (DLRU), which incorporates decoding information in making cache replacement decisions. In addition, since individual clients may observe the global data access pattern from encoded packets broadcast by the server, we loosen the cache admission control policy and allow clients to cache decodable and potentially useful data items that are not currently being requested. Based on this idea, we further propose a variant scheme, which is called DLRU with cache partitioning (DLRU-CP), which couples the cache partitioning policy to DLRU. We build a simulation model and implement the most competing alternative solutions in the literature for performance evaluation. The simulation results conclusively demonstrate the superiority of the proposed schemes in terms of reducing the request response time in network-coding-assisted data broadcast systems.

关键词： Cache management mobile computing network coding on-demand broadcast

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Wireless Bidirectional Relaying using Physical Layer network coding with Heterogeneous PSK Modulation

arXiv

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arXiv 2017年

作者： Chinmayananda, A. Buch, Saket D. Rajan, B. Sundar Dept. of Electrical Communication Engg Indian Institute of Science BangaloreKarnataka560012 India Dept. of Electrical Engg Indian Institute of Science BangaloreKarnataka560012 India

—In bidirectional relaying using Physical Layer network coding (PLNC), it is generally assumed that users employ same modulation schemes in the Multiple Access phase. However, as observed by Zhang et al. [1], it may not be desirable for the users to always use the same modulation schemes, particularly when user-relay channels are not equally strong. Such a scheme is called Heterogeneous PLNC. However, the approach in [1] uses the computationally intensive Closest Neighbour Clustering (CNC) algorithm to find the network coding maps to be applied at the relay. Also, the treatment is specific to certain cases of heterogeneous modulations. In this paper, we show that, when users employ heterogeneous symmetric-PSK modulations, the network coding maps and the mapping regions in the fade state plane can be obtained analytically. Performance results are provided in terms of Relay Error Rate (RER) and Bit Error Rate (BER). Copyright © 2017, The Authors. All rights reserved.

关键词： network coding

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An Optimization Scheme of Enhanced Adaptive Dynamic Energy Consumption Based on Joint network-Channel coding in WSNs

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IEEE SENSORS JOURNAL 2017年第18期17卷 6119-6128页

作者： Liu, Xingcheng Li, Wei Han, Feng Xie, Yi Sun Yat Sen Univ Sch Elect & Informat Engn Guangzhou 510006 Guangdong Peoples R China Acad Unit Natl Def Guangzhou Guangdong Peoples R China Sun Yat Sen Univ Sch Data & Comp Sci Guangzhou 510006 Guangdong Peoples R China

Energy efficiency in wireless sensor networks is a crucial factor that affects the performance of the networks, as long-time and unceasing energy supply is impossible. Recent studies demonstrated that the previously proposed scheme of joint adaptive network-channel coding (JANCC) and adaptive dynamic energy consumption (ADEC) obtained an excellent performance in terms of energy efficiency. Based on the joint network-channel coding, we propose an enhanced ADEC optimization scheme, which integrates the essence of both JANCC and ADEC, and overcomes the shortcomings of them. In the scheme, an identifier vector is inserted into the feedback information. The relay node is able to acquire the specific signs of the channel codes received in error based on the identifier vector and transmit the network coded packets only related to those channel codes received in error. Through this method, it can achieve adjustments for the current round of transmission. Performance analyses and simulation results show that the proposed optimization scheme is more energy efficient than any other schemes of interest under the condition of meeting the requirement of transmission reliability.

关键词： Wireless sensor network (WSN) energy consumption network coding joint network-channel coding

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An Improved Min-cost Max-flow network coding Algorithm

An Improved Min-cost Max-flow Network Coding Algorithm

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2017 2nd International Conference on Wireless Communication and network Engineering(WCNE 2017)

作者： Yang-tian-xiu HU Li-min MENG Pei-rui JIANG Yu-zhou SHANG College of Information Engineering Zhejiang University of Technology

network coding can significantly improve the network communication performance;however, the introduction of encoding nodes will lead to more resource consumption. In this paper, we proposed an improved Min-cost Max-flow network coding algorithm to reduce resource consumption under the new principle of encoding node, which has been augmented until achieves the network maximum flow according to the min-cost path in the shortest paths from the source node to the sink node. Simulation results show that compared with the previous max-flow algorithm, this improved algorithm can not only reduce the total cost, but also reduce the encoding nodes and the network resource overhead when applied to the network coding.

关键词： network coding Min-cost Max-flow The shortest path Encoding node

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