scholarly journals Distributed Misbehavior Detection Scheme for Delay Tolerant Networks

2019 ◽  
Vol 8 (9S3) ◽  
pp. 1288-1292
Keyword(s):  
Network Performance ◽  
Detection System ◽  
Delay Tolerant Networks ◽  
Secure Routing ◽  
Security Model ◽  
Detection Scheme ◽  
Misbehavior Detection ◽  
Distributed Approach ◽  
Intermittent Connectivity ◽  
Delay Tolerant

Opportunistic forwarding mechanism in Delay Tolerant Networks (DTN), are prone to get disconnected from the nodes in the network. These types of networks deal with intermittent connectivity, large delays.Existing routing protocols of DTNs fights with these issues, but fail to integrate the security available for delay tolerant networks,it is necessary to design a secure routing protocol to overcome these issues. There are centralized Trust Authority (TA) based security systems but the disconnection or failure of TA, affects the security model and network performance. It becomes crucial to have the distributed approach for security system and have multiple TAs working on security model. This reduces the possibility of poor network performance. The paper presents a distributed misbehavior detection system, and implements multiple TAs for implementing the security model for DTN.

scholarly journals Towards Intelligent Caching and Retrieval Mechanisms for Upcoming Proposals on Vehicular Delay-Tolerant Networks

2011 ◽  
Vol 7 (1) ◽  
pp. 1 ◽  
Author(s):  
Bruno M. C. Silva ◽  
Vasco N. G. J. Soares ◽  
Joel J. P. C. Rodrigues
Keyword(s):  
Network Performance ◽  
Ad Hoc ◽  
Storage Capacity ◽  
State Of The Art ◽  
Delay Tolerant Networks ◽  
Opportunistic Networks ◽  
Network Nodes ◽  
Intermittent Connectivity ◽  
Delay Tolerant ◽  
Carry And Forward

Vehicular delay-tolerant networks (VDTNs) are opportunistic networks that enable connectivity in challenged scenarios with unstable links where end-to-end communications may not exist. VDTN architecture handles non-real timeapplications using vehicles to relay messages between network nodes. To address the problem of intermittent connectivity, network nodes store messages on their buffers, carrying them through the network while waiting for transfer opportunities. The storage capacity of the nodes affects directly the network performance. Therefore, it is important to incorporate suitable network protocols using self-contained messages to improve communication that supports store-carry-and-forward operation procedures. Clearly, such procedures motivate content cachingand retrieval. This paper surveys the state-of-the art on intelligent caching and retrieval mechanisms focusing on ad-hoc and delay tolerant networks (DTN). These approaches can offer important insights for upcoming proposals on intelligent caching and retrieval mechanisms for VDTNs.

A Data Cooperative Caching Policy Using Human Mobile Patterns for Delay Tolerant Networks

2010 ◽  
Vol 171-172 ◽  
pp. 561-564
Author(s):  
Hui Ye ◽  
Zhi Gang Chen ◽  
Xiao Jian Shen
Keyword(s):  
Network Performance ◽  
Data Dissemination ◽  
Delay Tolerant Networks ◽  
Cooperative Caching ◽  
Network Cost ◽  
Movement Characteristics ◽  
Delay Tolerant ◽  
The Impact ◽  
Caching Policy ◽  
Address Matching

Recently, many researchers focus on delay tolerant networks (DTN). In DTN, the mobile characteristic of nodes is used to help transfer data. Therefore, how to use the cooperative relations and cache resource of nodes effectively to avoid network congestion and improve network performance is an important issue. In this paper, we proposed a cooperative caching policy based on human mobile patterns, which referred as HMP-Cache. The node movement characteristics are discussed in detail in HMP-Cache. HMP-Cache uses the standard of target address matching to choose cooperative caching nodes. In addition, the sharing caching information is done by synchronization of caching table in local region. Therefore, the impact of useless data dissemination of multiple hops is reduced. And the shortcoming of limited caching resources is compensated. The simulation results show that our policy can control the network cost effectively. Also, the remote data latency is reduced.

scholarly journals An Efficient method for Secure Routing in Delay Tolerant Networks

2018 ◽  
Vol 143 ◽  
pp. 820-826 ◽  
Author(s):  
C C Sobin ◽  
Ct Labeeba ◽  
K Deepika Chandran
Keyword(s):  
Efficient Method ◽  
Delay Tolerant Networks ◽  
Secure Routing ◽  
Delay Tolerant

scholarly journals A Sequence Number Prediction Based Bait Detection Scheme to Mitigate Sequence Number Attacks in MANETs

2018 ◽  
Vol 2018 ◽  
pp. 1-13
Author(s):  
Rutvij H. Jhaveri ◽  
Aneri Desai ◽  
Ankit Patel ◽  
Yubin Zhong
Keyword(s):  
Network Performance ◽  
Ad Hoc ◽  
Secure Routing ◽  
Detection Mechanism ◽  
Neighboring Node ◽  
Detection Scheme ◽  
Data Packets ◽  
Sequence Number ◽  
Aodv Protocol ◽  
And Performance

The characteristics of MANET such as decentralized architecture, dynamic topologies make MANETs susceptible to various security attacks. Sequence number attacks are such type of security threats which tend to degrade the network functioning and performance by sending fabricated route reply packets (RREP) with the objective of getting involved in the route and drop some or all of the data packets during the data transmission phase. The sequence number adversary attempts to send a fabricated high destination number in the RREP packet which attracts the sender to establish a path through the adversary node. This paper proposes a proactive secure routing mechanism which is an improvement over the authors previously proposed scheme. It makes use of linear regression mechanism to predict the maximum destination sequence number that the neighboring node can insert in the RREP packet. As an additional security checkpoint, it uses a bait detection mechanism to establish confidence in marking a suspicious node as a malicious node. The proposed approach works in collaboration with the ad hoc on-demand distance vector routing (AODV) protocol. The simulation results depict that the approach improves the network performance in the presence of adversaries as compared to previously proposed scheme.

scholarly journals A Fuzzy-Logic-Based Double Q -Learning Routing in Delay-Tolerant Networks

2021 ◽  
Vol 2021 ◽  
pp. 1-17
Author(s):  
Jiagao Wu ◽  
Fan Yuan ◽  
Yahang Guo ◽  
Hongyu Zhou ◽  
Linfeng Liu
Keyword(s):  
Fuzzy Logic ◽  
Mobile Networks ◽  
Learning Algorithm ◽  
Buffer Management ◽  
Delay Tolerant Networks ◽  
Movement Speed ◽  
Delivery Ratio ◽  
Node Activity ◽  
Intermittent Connectivity ◽  
Delay Tolerant

Delay-tolerant networks (DTNs) are wireless mobile networks, which suffer from frequent disruption, high latency, and lack of a complete path from source to destination. The intermittent connectivity in DTNs makes it difficult to efficiently deliver messages. Research results have shown that the routing protocol based on reinforcement learning can achieve a reasonable balance between routing performance and cost. However, due to the complexity, dynamics, and uncertainty of the characteristics of nodes in DTNs, providing a reliable multihop routing in DTNs is still a particular challenge. In this paper, we propose a Fuzzy-logic-based Double Q -Learning Routing (FDQLR) protocol that can learn the optimal route by combining fuzzy logic with the Double Q -Learning algorithm. In this protocol, a fuzzy dynamic reward mechanism is proposed, and it uses fuzzy logic to comprehensively evaluate the characteristics of nodes including node activity, contact interval, and movement speed. Furthermore, a hot zone drop mechanism and a drop mechanism are proposed, which can improve the efficiency of message forwarding and buffer management of the node. The simulation results show that the fuzzy logic can improve the performance of the FDQLR protocol in terms of delivery ratio, delivery delay, and overhead. In particular, compared with other related routing protocols of DTNs, the FDQLR protocol can achieve the highest delivery ratio and the lowest overhead.

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