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- This paper proposes a novel multipath routing protocol for MANETs. The proposed protocol is a variant of the single path AODV routing protocol. The proposed multipath routing protocol establishes node-disjoint paths that have the lowest delays based on the interaction of many factors from different layers. Other delay aware MANETs routing protocols don't consider the projected contribution of the...
In a mobile ad-hoc network, nodes cannot rely on any fixed infrastructure for routing purposes. Rather, they have to cooperate to achieve this objective. However, performing network functions consumes energy and other resources. Therefore, some network nodes may decide against cooperating with others; selfish nodes. Also security issues are more paramount in such networks even more so than in wired...
Mapping an H.264/SVC (Scalable Video Coding) bitstream to the IEEE 802.11e video service class may result in the decoder discarding an excessive number of packets. This is because of dependencies between the discarded packets and those dropped in the service queue. Instead, the paper proposes mapping SVC quality layers across multiple service classes, thereby reducing the impact of traffic congestion...
This paper investigates congestion behavior of TCP and its variants TCP Reno, TCP NewReno, TCP Sack1, TCP Vegas, TCP Rbp and TCP Fack for AODV (Ad hoc Ondemand Distance Vector) and DSR (Dynamic Source Routing) routing protocols under persistent packet reordering attack through simulations in NS-2. It also proposes a solution to counter misinterpretation packet reordering with packet loss when retransmissions...
Most of routing protocols used for Mobile Ad hoc Network (MANET), such as Ad hoc on demand distance vector (AODV) routing, uses minimum hops as the only metric for choosing a route. This decision might lead to cause some nodes become congested which will degrade the network performance. This paper proposes an improvement of AODV routing algorithm by making routing decisions depend on fuzzy cost based...
Many anticipated deployment scenarios, in particular military, healthcare, and disaster-recovery applications, of Wireless Sensor Networks (WSNs) require reliable source to sink communication. In this paper, we introduce a novel reliable topology that uses hotlines between sensor gateways to enhance the reliability of end-to-end transmissions. These hotlines reduce the number of average hops from...
Wireless sensor network is a wireless ad hoc network that consists of very large number of tiny sensor nodes communicating with each other with limited power and memory constrain. WSN demands real-time routing which requires messages to be delivered within their end-to-end deadlines (packet lifetime). Since many sensor networks will be deployed in critical applications, security is essential. Recently,...
Packet delivery and latency are several performance metrics used to determine the effectiveness of a new routing algorithm. The multiple access protocol in mobile ad hoc network (MANET) requires nodes to contend for the shared medium when transmitting route request (RREQ) in the route discovery phase and this will create a broadcast storm which increases the probability of packet collisions despite...
Flooding of request packet in the route discovery phase in Mobile Ad Hoc Network (MANET) creates a broadcast storm which increases the probability of packet collisions. With location information of the destination node, the source node and also of the current node, route request will be more directed towards destination since nodes that are within the directed region will participate in the routing...
Wireless sensor network (WSN) has become a hot research area due to its important applications in military, health, home and other commercial areas. WSN is referred to as a group of sensors and base station(s) linked by wireless medium to perform sensing and decision-making tasks. In WSN, sensors gather information about the physical world, while base station takes decisions and then perform appropriate...
Routing in mobile ad hoc network (MANET) has been a subject of extensive research over the past several years. Quadrant-based directional routing protocol (Q-DIR) is a routing protocol where only nodes in the same quadrant as the destination will participate in the route discovery process. Q-DIR uses exact location of nodes based on Cartesian-coordinate system to determine the quadrant nodes are located...
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