Node cooperation is considered in this paper in the existence of two relaying protocols i.e. “Amplify and Forward (AF)” also called “Store and Forward (SF)” and the second relaying protocol is “Decode and Forward”. The two stated protocols are different from each other and perform different operations on received data before retransmitting to next hop. Also the selection of each protocol is var...

Cooperative relaying enables nodes to actively cooperate to deliver packets to their destination. The bestselect protocol (BSP) implements a type of cooperative relaying that generalizes single path routing with sets of nodes (relay-sets) replacing the concept of a single node relay. Thus, while in traditional single path routing, packets hop from node to node, in BSP, packets hop from relay-se...

In IEEE 802.16j wireless multihop networks, transmission latency from relay nodes to a gateway node is one of the important performance metrics. The transmission latency is mainly affected by a scheduling delay at every relay node, which is determined by algorithms for assigning time slots to wireless links between relay nodes. In this paper, we propose 2 kinds of time slot assignment algorithm...

IEEE 802.11a/b/g standards support multiple transmission rates. Even though the use of multiple transmission rates increase the WLAN capacity, this feature leads to the performance anomaly problem. Cooperative communication was introduced to relieve the performance anomaly problem. Data packets are delivered to the destination much faster through a relay node with high rate than through direct ...

In this paper, we address the problem of communication over the relay channel from the perspective of a stochastic game and evaluate the fundamental tradeoffs between direct communication and relaying through a detailed foray into the questions of throughput, delay and energy-efficiency. We consider a simple wireless ad-hoc network with a transmitter, a relay and a common destination. The relay...

In the present industrial atmosphere, collecting reports from different units of the industries, sensor nodes are used. Continuous data monitoring, processing and transmitting affects the lifetime of nodes quickly. To overcome from this issue, a mobile relay node is developed and introduced in the industrial atmosphere. This mobile relay node tracks the location of sensor nodes placed at differ...

Social Delay Tolerant Networks (SDTNs) are a special kind of Delay Tolerant Network (DTN) that consists of a number of mobile devices with social characteristics. The current research achievements on routing algorithms tend to separately evaluate the available profit for each prospective relay node and cannot achieve the global optimal performance in an overall perspective. In this paper, we pr...

Cooperative diversity uses relays which assist source destination transmissions to reduce link outage rates in multipath fading environments. In this paper, an Amplify-and-Forward (AAF) cooperative communication system over Nakagami-m fading channel is considered where a source node communicates with a destination node directly and indirectly (through multiple relays). Nakagami-m fading channel...

In this paper, we consider the mobile ad hoc network (MANET) which consists of two types of mobile nodes called traditional and relay nodes. The traditional node has limited energy whereas the relay node has relatively abundant energy. The primary objective of this paper is to minimize the power consumption in the mobile ad hoc networks. The main idea behind the proposed relay node deployment f...

Simultaneous wireless information and power transfer (SWIPT) is a promising new solution to provide a perpetual lifetime for energy constrained nodes in wireless networks. In this paper, we consider a wireless sensor relay network, where relay nodes forward a radio frequency (RF) signal from a source node to a destination node by first harvesting energy from the RF signal. For multiple relay no...