Review Paper on Mobile Ad-hoc Networks

Vegda, Hiral; Modi, Nimesh

doi:10.5120/ijca2018916859

Cited by 3 publications

(2 citation statements)

References 2 publications

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“…The wireless communication system between the teleoperation system and the UGV was carried by a mobile ad hoc network (MANET) [41]. The MANET was a collection of wireless mobile nodes dynamically forming a temporary network without the use of any existing network infrastructure or centralized administration.…”

Section: Wireless Communication Systemmentioning

confidence: 99%

Guidance Point Generation-Based Cooperative UGV Teleoperation in Unstructured Environment

Zhu

Xiong

Chen

et al. 2021

Sensors

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Teleoperation is widely used for unmanned ground vehicle (UGV) navigation in military and civilian fields. However, the human operator has to limit speed to ensure the handling stability because of the low resolution of video, limited field of view and time delay in the control loop. In this paper, we propose a novel guidance point generation method that is well suited for human–machine cooperative UGV teleoperation in unstructured environments without a predefined goal position. The key novelty of this method is that the guidance points used for navigation can be generated with only the local perception information of the UGV. Firstly, the locally occupied grid map (OGM) was generated utilizing a probabilistic grid state description method, and converted into binary image to constructed the convex hull of obstacle area. Secondly, we proposed an improved thinning algorithm to extract skeletons of navigable regions from binary images, and find out the target skeleton related to the position of the UGV utilizing the k-nearest neighbor (kNN) algorithm. The target skeleton was reconstructed at the midline position of the navigable region using the decreasing gradient algorithm in order to obtain the appropriate skeleton end points for use as candidate guidance points. For visually presenting the driving trend of the UGV and convenient touch screen operation, we transformed guidance point selection into trajectory selection by generating the predicted trajectory correlative to candidate guidance points based on the differential equation of motion. Experimental results show that the proposed method significantly increases the speed of teleoperated UGV.

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Section: Wireless Communication Systemmentioning

confidence: 99%

Guidance Point Generation-Based Cooperative UGV Teleoperation in Unstructured Environment

Zhu

Xiong

Chen

et al. 2021

Sensors

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“…Among these attacks, routing attacks have well‐known central focus although they might cause the most destructive damage in MANET . In Reference , encryption is applied on the data by using the symmetric cryptographic technique, which uses same key for encryption and decryption. It also creates digital signature of data by using the asymmetric cryptographic technique from the hash of data.…”

Section: Introductionmentioning

confidence: 99%

Secure and efficient data transfer using spreading and assimilation in MANET

et al. 2020

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Mobile ad hoc Network (MANET) is a cluster of moveable devices connected through a wireless medium to design network with rapidly changing topologies due to mobility. MANETs are applicable in variety of innovative application scenarios where smart devices exchange data among each other. In this case, security of data is the major concern to provide dependable solution to users. This article presents a secure mechanism for data transfer where sender splits the data into fragments and receiver gets the actual data by assimilating the data fragments. We have presented an Enhanced Secured Lempel-Ziv-Welch (ES-LZW) algorithm that provides cryptographic operations for secure data transfer. In proposed model, we have utilized the disjoint paths to transfer the data fragments from sender side and assimilate these fragments at receiver to get the original data. The messages containing data fragments are compressed and encrypted as well. Our scheme ensures confidentiality, integrity, efficient memory utilization, and resilience against node compromising attacks. We have validated our work through extensive simulations in NS-2.35 using TCL and C language. Results prove that our scheme reduces memory consumption along with less encryption and decryption cost as compared to blowfish especially when plaintext has more repetitive data. We have also analyzed the impact of creating data fragments, fraction of communication compromised, and probability to compromise the data fragments by subverting intermediaries.

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