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Delay Tolerant Network (DTN) is a type of network that permanent connections between nodes are not always available. Routing in DTN uses store-carry-and-forward scheme, where nodes store and carry data until a suitable message carrier appears. Positive social characteristics such as centrality and friendship can be used to make a better routing decision in DTN. However, negative social characteristics...
Delay Tolerant Networks (DTNs) are used to deliver messages in cases of intermittent connectivity. Disaster scenarios with multiple Mobile Ad hoc Networks formed by the communication equipment of first responders are one example for such networks. In this paper, we evaluate different delay tolerant routing schemes based on realistic mobility models and traffic patterns. Both options are crucial as...
MANET is a collection of computational devices that creates random topology for communication. The beauty of MANET is that it not required any central controller or base station. The devices used in MANET may be fixed or mobile. MANET is only a network in which devices worked as a host as well as router. The routing protocol used in mobile ad hoc network is broadly classified in three category-proactive,...
In the future, mobile ad hoc network (MANET) is predicted to play more important roles for device communication with self organized infrastructure. Effectiveness of routing protocols and congestion control mechanisms, highly determines the performance of MANET. Previous research in protocol development did not pay much attention in selecting the appropriate protocol on other layers. Therefore, the...
This paper describes performance evaluation of VoIP over wireless ad hoc networks using OPNET tool. The simulation study is completed by running VoIP application in different network scenarios with different routing protocols; namely: AODV, TORA and DSR and with different queuing techniques: FIFO, PQ and WFQ. The following performance parameters: the delay jitter, packet end-to-end delay, wireless...
In a mobile ad hoc network (MANET), communication between mobile nodes occurs without centralized control. In this environment the mobility of a node is unpredictable; this is considered as a characteristic of wireless networks. Because of faulty or malicious nodes, the network is vulnerable to routing misbehavior. The resource constrained characteristics of MANETs leads to increased query delay at...
Wireless Sensor Network (WSN) is consisting of independent and distributed sensors to monitor physical or environmental conditions, such as temperature, sound, pressure, etc. Routing protocols represent an essential aspect of the performance of mobile wireless networks. This paper presents a comparative analysis between several routing algorithms and their impact on the performance of WSN. The performance...
DTN (Delay Tolerant Network) facilitates a communication between heterogeneous networks when there are transmission delay and network disconnection frequently, in order to support a transmission of messages without infrastructure like Internet. For improvement of spray and wait routing, which is the representative routing protocol in DTN, this paper proposes the selective 2-phase spray and wait routing...
A Mobile Ad-hoc Network (MANET) is a dynamic wireless network that can be formed without the need for any pre-existing infrastructure in which each node can act as a router. One of the major challenges of MANET is the design of vigorous routing algorithms that adapt to the frequent and randomly varying network topology. Numbers of routing protocols have been proposed and several of them have been...
Recent research has highlighted the potential of equipping soldiers with portable computing devices as a means to regularly report complex and important observations to mission planners at headquarters. To realise such scenarios connectivity between disparate elements in the battlefield needs to be established and appropriate supporting algorithms developed. In MANET literature several algorithms...
In Delay Tolerant Networks (DTNs), how to transmit data efficiently is one of the most important issues. Recently, Random Linear Network Coding (RLNC) is proposed as a promising approach to improve data transmission efficiency in DTNs. To facilitate the development of deployment of RLNC based routing protocols, it is imperative to quantify the performance gain brought by RLNC in a rigorous and systematic...
The task of finding and sustaining routes in mobile ad-hoc networks (MANETS) is an important factor in determining the efficiency of any MANET protocol. MANET characteristically comprises of wireless mobile hosts whose communication with each other is devoid of any fixed infrastructure. Absence of fixed infrastructures and host mobility thus constitute frequent unpredictable topological views. Positional...
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