Reliability And Trust In MANET Analysis

Reliability and Trust in Mobile Ad-hoc NETworks (MANET) are considerable due to their applicability in different situations such as military, emergency applications or health care applications. Indeed, due to absence of a fixed infrastructure and a central controller, providing trust and reliability still is challenge in these networks. Since energy is limited and distributed in MANETs, trust and reliability providing (is different from wired systems and it must be reasonable and compatible with network resources. Many literatures have been dedicated to provide trust and reliability in MANETs. In this paper we have a review on reliable and trusted routing protocols in MANETs.
Keywords: Mobile Ad-Hoc Networks, Routing, Trust, Reliability
I. INTRODUCTION
II. RELIABILITY AND TRUST
Reliability is an important issue in MANETs, and it would become a main issue when the system environment is distributed and energy is limited. Reliability is affected severely by fault and failure which happen because of several reasons. Occurring fault and failure in MANETs is deniable, therefore it must be looking for an approach to recover the transmitted information after occurring failure. Reliability is so important in fault and loss packet sensitive application. Hence, many researches are offered in MANET’s routing in order to increasing reliability which some of them are offered in this section.
Generally, multipath routing techniques are used for increasing reliability. The techniques mainly divide into two groups: discrete nodes and discrete edges [5]. When failure happen in a path, another paths are available to perform the operation, therefore route recovery is not required for disabled path [6]. But multipath routing is weak about packet
Santivanez et al, have introduced scalability metric in MANETs as sum of header and a least of load traffic. The analysis provided an improvement for simple flooding algorithms in high mobility scenarios with vague monitoring of connections [8]. In [9] a protocol is offered based on AODV. In the paper, high reliable nodes are used in order to increasing reliability. Authors have tried to use high reliable nodes in routing and rout discovery. Indeed, multipath routing is applied to prevent bottlenecks. Complexity of using high reliable nodes in implementation and large delay of multipath routing through reliable nodes are the limitation of this research. In [10], Heusse et al proved that if a low number of nodes operate in bandwidth, efficiency would be decreased. In [11], three techniques is studied to increase reliability: Retransmission of data link layer, Placement of low quality connections in black list and using reliability metrics in order to increase reliability in packet