A novel contact prediction‐based routing scheme for DTNs

Abstract

Delay/disruption tolerant networks (DTNs) make opportunistic communications by utilising the mobility of nodes. The characteristics of high mobility of nodes and high dynamicity of network topology result in an absence of instantaneous end-to-end path from any source to a destination and thus make routing a challenge in DTNs. To deal with this issue, researchers have investigated a variety of routing schemes for DTNs based on the prediction of future contacts, in which node mobility is explored and used. However, the previous works did not consider the instant contact information such as the last contact duration time and the instant separation time since the last contact whilst making routing decisions, leading to less prediction accuracy of future contacts and thus worse routing performance. In this paper, a novel contact predictionbased routing scheme is proposed for DTNs to increase delivery ratio by considering the instant contact information. Specifically, to predict the contact probability of two nodes accurately, the statistical contact information, the instant contact information and the contact transitivity are comprehensively considered. The simulation evaluations show that the proposed contact prediction-based routing substantially improves delivery ratio and reduces delivery latency and delivery overhead compared with traditional DTN routing schemes.

A vehicular network for social services using data dissemination

“…Routing‐based data transmission schemes in VANETs have been considerably studied, and many different protocols have been proposed. The routing protocols are classified into five categories as follows: ad hoc, position‐based, cluster‐based, broadcast and geocast routing .…”

An Efficient Content Dissemination Approach for Mobile E-Learning

“…Specifically, the Device-to-Device (D2D) wireless communication technologies have been rapidly developed, and numerous human-carried smart mobile devices such as smart phones, smart watches, have been widely adopted in human daily life, which therefore causes the appearance of mobile e-learning [3][4][5][6]. In the mobile e-learning environments, pervasive and ubiquitous learning schemes can be applied, in which humans could learn anywhere and anytime with the human-carried mobile smart devices, especially in those infrastructure-less environments, in which humans could apply convenient content sharing based on the D2D communication technology when two people's smart devices are within the range of their wireless communication range [7][8][9].…”

“…Currently, a variety of approaches have been proposed for content sharing and data transmission based on different techniques (e.g., replication-based and forwarding-based) [6][7][8][9][10][11][12][13][14]. Replicationbased schemes allow multiple copies of a content existing in the environment in the hope that multiple copies will increase the content delivery ratio, of which the epidemic solution based on flooding policy is the typical scheme.…”

TMODF: Trajectory-based multi-objective optimal data forwarding in vehicular networks

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