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Experimental evaluation of an on-demand multipath routing protocol for video transmission in mobile ad hoc networks

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2006年第Z1期7卷 145-150页

作者： TANIYAMA Kenta MORII Takeshi KOIZUMI Shinya NOGUCHI Kazuhiro KOTANI Yukihiro KATTO Jiro Graduate School of Science and Engineering Waseda University Tokyo 169-8555Japan

We propose an on-demand multipath routing algorithm in a mobile ad hoc network for video transmission and evaluate its real world performance in video streaming application. There have been a number of multipath routing protocols extended from AODV which is a well-known single path routing protocol. Multipath routing protocols indicate good performance in the reduction of route discovery latency and unnecessary routing packets in simulations. We show that the route establishment using source route lists provided by us (Hu and Johnson, 2002) can reduce the route discovery latency, select stable routes automatically, and work well for live video streaming without limitation of the hop count based approaches. We evaluate this proposed method compared with the original AODV by using eight laptop PCs and demonstrate live streaming experiments.

关键词： Mobile ad hoc networks, AODV, Multipath routing, Source routes

adaptive neighbor constrained deviation sparse variant fuzzy c-means clustering for brain MRI of ad subject

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Visual Informatics 2021年第4期5卷 67-80页

作者： Sukanta Ghosh Amlan Pratim Hazarika Abhijit Chandra Rajani K.Mudi Department of Instrumentation&Electronics Engineering Jadavpur UniversityKolkata700106India

Progression of Alzheimer’s disease(ad)bears close proximity with the tissue loss in the medial temporal lobe(MTL)and enlargement of lateral ventricle(LV).The early stage of ad,mild cognitive impairment(MCI),can be traced by diagnosing brain MRI scans with advanced fuzzy c-means clustering algorithm that helps to take an appropriate *** this paper,firstly the sparsity is initiated in clustering method that too rician noise is also incorporated for brain MR scans of ad ***,a novel neighbor pixel constrained fuzzy c-means clustering algorithm is designed where topoloty-based selection of parsimonious neighbor pixels is *** adaptability in choice of neighbor pixel class outliers more justified object edge boundary which outperforms a dynamic cluster *** proposed adaptive neighbor constrained deviation sparse variant fuzzy c-means clustering(AN_DsFCM)can withhold imposed sparsity and withstands rician noise at imposed sparse *** novel algorithm is applied for MRI of ad subjects and normative data is acquired to analyse clustering *** data processing pipeline of theoretically plausible proposition is elaborated in *** experimental results are compared with state-of-the-art fuzzy clustering methods for test MRI *** evaluation and statistical measures are studied to meet both image processing and clinical neurophysiology *** the performance of proposed AN_DsFCM is significantly better than other methods.

关键词： MRI Fuzzy c-means Neighbor information modeling Sparse Rician noise ad

Physiological Roles of β-amyloid in Regulating Synaptic Function:Implications for ad Pathophysiology

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Neuroscience Bulletin 2023年第8期39卷 1289-1308页

作者： Wenwen Cai Linxi Li Shaoming Sang Xiaoli Pan Chunjiu Zhong Department of Neurology Zhongshan HospitalFudan UniversityShanghai 200032China Basic Medical College Nanchang UniversityNanchang 330031China State Key Laboratory of Medical Neurobiology Institutes of Brain Science&Collaborative Innovation Center for Brain ScienceFudan UniversityShanghai 200032China

The physiological functions of endogenous amyloid-β(Aβ),which plays important role in the pathology of Alzheimer's disease(ad),have not been paid enough ***,we review the multiple physiological effects of Aβ,particularly in regulating synaptic transmission,and the possible mechanisms,in order to decipher the real characters of Aβunder both physiological and pathological *** worthy studies have shown that the deprivation of endogenous Aβgives rise to synaptic dysfunction and cognitive deficiency,while the moderate elevation of this peptide enhances long term potentiation and leads to neuronal *** this review,we provide a new view for understanding the role of Aβin ad pathophysiology from the perspective of physiological meaning.

关键词： Aβ Physiological role Synapse LTP Synaptic vesicle cycle Cognition ad

A NEW KEY MANAGEMENT METHOD FOR ad HOC NETWORKS

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China Communications 2007年第1期4卷 8-13页

作者： Liu, Chun Liu, Jianwel Zhang, Qishan Beihang Univ Sch Elect & Informat Engn Beijing 100083 Peoples R China

Some security-sensitive fields like military scenarios are the main application areas of ad hoc *** those areas,security issues have to be considered seriously for the *** this paper, a key management method based on the combined public key is proposed for ad hoc networks. Through this method,private and public key pairs can be distributed to nodes of ad hoc networks *** certificate or other authentic channel is needed while two nodes perform authentication and key agreement *** key management method is especially suitable for ad hoc networks,which has no fixed infrastructure and has constrained resources.

关键词： key management combined public key ad hoc networks

A Two-Step Authentication Framework in Mobile ad-Hoc Networks

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China Communications 2007年第1期4卷 28-39页

作者： Nikos Komninos Dimitris Vergados Christos Douligeris Algorithms & Security Group Athens Information Technology19002 Peania Greece Dept.of Information and Communication Systems Engineering University of the Aegean83200 Samos Greece Dept.of Informatics University of Piraeus18534 Piraeus Greece

The lack of fixed infrastructure in ad hoc networks causes nodes to rely more heavily on peer nodes for ***,establishing trust in such a distributed environment is very difficult, since it is not straightforward for a node to determine if its peer nodes can be *** additional concern in such an environment is with whether a peer node is merely relaying a message or if it is the originator of the *** this paper,we propose an authentication approach for protecting nodes in mobile ad hoc *** security requirements for protecting data link and network layers are identified and the design criteria for creating secure ad hoc networks using several authentication protocols are *** based on zero knowledge and challenge response techniques are presented and their performance is evaluated through analysis and simulation.

关键词： authentication steps link and network layers ad hoc networks

Incentive Schemes of Nodes for ad Hoc and Multi-hop Cellular Networks

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China Communications 2007年第4期4卷 79-88页

作者： Wang Kun Wu Meng Nanjing Univ Posts & Telecommun Inst Commun & Informat Engn Nanjing 210003 Peoples R China

Nodes cooperation is a significant prerequisite for the realization of the relaying ad *** with the development of multi-hop cellular networks, how to stimulate intermediate nodes to do the packet-forwarding deserves more *** present research,the incentive schemes in pure ad Hoc and multi-hop cellular networks are analyzed and compared to classify the strengths and drawbacks of each *** explain in particular what the key issues are to implement incentive schemes for cooperation. Finally,an incentive scheme based on integration of reputation and charging systems is proposed not only to block the existence of selfish nodes,but to satisfy the rational requirement of nodes.

关键词： node cooperation incentive scheme in-depth summary multi-hop cellular networks ad Hoc security

A Cumulative Authentication Method for Securing Source Routing Protocols in ad Hoc Networks

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China Communications 2007年第1期4卷 40-47页

作者： B.Moussakhani S.M.Safavi H.Ebrahimzad Amirkabir University of Technology Iran Telecommunication Research Center (ITRC) Tehran Iran

Initial works in ad hoc routing have considered only the problem of providing efficient mechanisms for finding paths in such networks,without considering security as a major *** such a trusted environment,malicious behaviors can disturb routing *** present the design and performance evaluation of a new secure on-demand routing protocol for ad hoc networks, called *** is robust against attackers from outside of the network and even it prevents compromised nodes from tampering with uncompromised routes consisting of uncompromised *** of using symmetric cryptography in its structure,CASR is robust against large number of types of Denial-of -Service ***,due to the applying of the random key predistributions method to the routing process our proposed scheme reaches a trade-off between the degree of security and complexity.

关键词： ad hoc networks routing security cryptography random key predistributions

Authenticating QoS-Guaranteed Multicast Route Discovery for ad hoc Networks

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China Communications 2007年第1期4卷 48-55页

作者： Mingxi, Yang Layuan, Li Yiwei, Fang Wuhan Univ Technol Sch Comp Sci & Tech Wuhan 430070 Peoples R China Huazhong Univ Sci & Technol Dept Elect & Inf Eng Wuhan 430074 Peoples R China

This paper presents SEQMRAN,a novel secure efficient QoS multicast route discovery protocol for mobile ad hoc *** protocol relies entirely on one-time signature mechanism,HORSEI,with very efficient signing and verifying,and we do this by improving the HORSE protocol through the introduction of intermediate hash *** main purpose of SEQMRAN is to provide source authentication for QoS multicast routing discovery messages in MANET by constructing multicast tree with QoS and authentication constrains in mobile ad hoc *** performance measure of SEQMRAN is evaluated using network simulator *** results represent that SEQMRAN produces less end-to -end packet latency than RSA public key encryption based secure routing scheme,and it is a feasible approach to securing multicast routing with multiple QoS constrains for mobile ad hoc networks.

关键词： ad hoc maodv QoS security route

A quality of service routing protocol based on mobility prediction in mobile ad hoc networks

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Journal of Central South University of Technology 2003年第1期10卷 53-57页

作者：王建新邓曙光陈松乔陈建二 CollegeofInformationScienceandEngineeringCentralSouthUniversity

A QoS routing protocol based on mobility prediction is proposed. The protocol selects the steadiest path based on mobility prediction and QoS requirements on bandwidth, delay, and so forth. The main properties of the protocol as follows. (1) Each node just broadcasts its own information, so the packet is very small and can get to the destination in a very short time. (2) When another path is built for the same QoS requirements, the original path has higher priority. (3) The update messages are reduced by using mobility prediction. (4) Data packets carry the information of link change using piggyback, which is helpful for forecasting the link status more accurately. (5) When source node gets Resource Reserve and reconnect packets at the same time, it selects reconnect packet over Resource Reserve packet. The results of simulation show that the protocol has good network performance with low control overload, and efficiently supports transmitting multimedia with QoS requirements in mobile ad hoc networks.

关键词： mobile ad hoc networks prediction QoS routing