Abstract
Due to the dynamism of topology, sharing of bandwidth and constraint of resources in wireless nodes, the provision of quality of service (QoS) for routing in mobile ad hoc networks (MANETs) presents a great challenge. Security is another crucial aspect of providing QoS since the existence of malicious nodes present all kinds of threats to MANETs. Although a number of mechanisms have been proposed for protecting MANETs, most of the solutions are only effective for a particular kind of attacks or provide security at the cost of sacrificing QoS. In this paper, we propose a trust-based secure QoS routing scheme by combining social and QoS trust. The primary approach of the proposed scheme relies on mitigating nodes that exhibit various packet forwarding misbehavior and on discovering the path that ensures reliable communication through the trust mechanism. The scheme would select the best forwarding node based on packet forwarding behavior as well as capability in terms of QoS parameters, such as residual energy, channel quality, link quality, etc. We will present an adversary model for packet dropping attack against which we evaluate the proposed scheme. Simulation experiment using Network Simulator-2 (NS2) and under various network conditions show that mixing social and QoS trust parameters can greatly improve security and quality of service routing in terms of overhead, packet delivery ratio and energy consumption.
Highlights
Along with the widespread use of cheaper, smaller and more powerful wireless nodes over the past few years, mobile ad hoc networks (MANETs) have received much attention, making it one of the most promising areas of wireless network development [1,2]
MANET is a self-organizing, dynamic, infrastructure-less network consisting of a set of wireless nodes that communicate with one another over one or more connections or hops without the need of a central authority [3]
A major challenge for MANETs is the design of a secure and efficient routing protocol that can ensure the overall quality of service during the routing process as MANET nodes communicate with each other only when they are located within the communication range of each other
Summary
Along with the widespread use of cheaper, smaller and more powerful wireless nodes over the past few years, mobile ad hoc networks (MANETs) have received much attention, making it one of the most promising areas of wireless network development [1,2]. When the receiver is far away from the transmitter, i.e., the destination is out of the transmission range of the transmitter, the dynamic nature of MANETs makes it difficult to ensure QoS since the node-to-node channel and link quality changes dynamically which may result infrequent link failures and cause nodes to make connections with other nodes [7,8]. Another important issue in MANETs is security since malicious nodes can deliberately misbehave so that packet contents can be altered and packet routing to the desired destinations can be disrupted, lowering packet delivery ratio as well as reliability [9]
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