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There are several groups of routing algorithms in dynamically changing networks developing every year. We introduce an additional parameter “Battery Life decrease” in the existing Q-Routing protocol. The Battery Life is reduced in direct proportion to the number of packets transmitted to the node. The efficiency of the Optimized Battery Life Q-Routing protocol is estimated by total loss of network...
This study presents the effect of residual energy of nodes in Wireless Sensor Networks (WSNs). There are many issues and challenges that still need to be solved in this area especially for energy contrain. This factor considered during clustering and routing approached to maximize network lifetime. To prolong network lifetime, there is a need for efficient power control mechanisms to reduce power...
Recently, the major challenge in the design of wireless sensor networks is to enhance the network lifetime. Many researchers have studied the problem of constructing virtual backbones, which are the backbones used for different time periods, in order to prolong the network lifetime. In this paper, we study the problem of constructing virtual backbones in dual-radio wireless sensor networks to maximize...
This paper describes the specific requirements in the design of versatile wireless sensor networks (WSN) and how MAC routing algorithms influence on their performance. Investigation of the impact of the MAC routing algorithms on the battery consumption of the sensor nodes and packet delivery delay is based on the WSN simulation in OMNET++ framework. Simulation results are validated with the actual...
For sensor networks, the extension of operating time by controlling power consumption is an important research subject. In a receiver-driven communication protocol, a receiver node transmits its ID to the sender node periodically, and in response the sender node sends an acknowledgment. The average power consumption of the network can be controlled, but a part of the network shuts down when the battery...
Position based routing protocols are kinds of routing protocols, which use nodes location information, instead of links information to routing. In position based routing protocols, it supposed that the packet source node has position information of itself and it's neighbors and the packet destination node. Greedy is a very important position based routing protocol. In one of it's kinds, named MFR...
The lifetime of a wireless network is significantly affected by the energy consumed on data transmission. One approach which allows reduction of the transmission energy consumption is the new networking paradigm - the delay tolerant networks (DTNs). The topology of DTNs consists of nodes with short transmission range, thus allowing the reduction of energy consumption. However, this short transmission...
Opportunistic routing (OR) schemes, such as ExOR, have been shown to provide significant throughput gains over traditional best-path routing schemes for wireless networks. Though the performance of OR schemes depend on the bit-rate, they currently use a fixed rate for transmitting packets. While several schemes have been proposed for selecting bit-rate for unicast transmission to a single receiver,...
A principal factor in sensor network design is energy efficiency. In this work, we propose to extend the lifetime of sensor networks using appropriate choice of sensor node distribution. The key idea of our scheme is to deploy more nodes in areas of extensive energy usage. Using this scheme of sensor node distribution, we use probabilistic angular routing to route data packets from the sensor nodes...
Three applications in wireless networks where model-free stochastic learning is applicable, are discussed. The learning based optimization problems are formulated and simulation results are presented. Some open issues are also discussed.
This paper presents a distributed fermat-point range estimation strategy, which is important in the moving sensor localization applications. The fermat-point is defined as a point which minimizes the sum of distances from three sensors inside a triangle. This point is indeed at the trianglepsilas center of gravity. We solve the problems of large errors and poor performance in the bounding box algorithm...
Sink mobility has become an increasingly important requirement of various sensor network applications. Handling such mobile sink conditions brings new challenges to large-scale sensor networking. This investigation proposed a hybrid-structure routing protocol (HSRP) that combines the benefits of grid-based and cluster-based structures. Grid-based structure is designed to solve the cluster head selection...
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