International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Geographic routing protocols for underwater wireless sensor networks a surveyijwmn
Underwater wireless sensor networks (UWSN), similar to the terrestrial sensor networks, have different
challenges such as limited bandwidth, low battery power, defective underwater channels, and high variable
propagation delay. A crucial problem in UWSN is finding an efficient route between a source and a
destination. Consequently, great efforts have been made for designing efficient protocols while considering
the unique characteristics of underwater communication. Several routing protocols are proposed for this
issue and can be classified into geographic and non-geographic routing protocols. In this paper we focus
on the geographic routing protocols. We introduce a review and comparison of different algorithms
proposed recently in the literature. We also presented a novel taxonomy of these routing in which the
protocols are classified into three categories (greedy, restricted directional flooding and hierarchical)
according to their forwarding strategies.
RMEER: Reliable Multi-path Energy Efficient Routing Protocol for Underwater W...IJECEIAES
Underwater Wireless Sensor Networks (UWSNs) is interesting area for researchers. To extract the information from seabed to water surface the the majority numbers of routing protocols has been introduced. The design of routing protocols faces many challenges like deployment of sensor nodes, controlling of node mobility, development of efficient route for data forwarding, prolong the battery power of the sensor nodes, and removal of void nodes from active data forwarding paths. This research article focuses the design of the Reliable Multipath Energy Efficient Routing (RMEER) which develops the efficient route between sensor nodes, and prolongs the battery life of the nodes. RMEER is a scalable and robust protocol which utilizes the powerful fixed courier nodes in order to enhance the network throughput, data delivery ratio, network lifetime and reduces the end-to-end delay. RMEER is also an energy efficient routing protocol for saving the energy level of the nodes. We have used the NS2.30 simulator with AquaSim package for performance analysis of RMEER.We observed that the simulation performance of RMEER is better than D-DBR protocol.
LBRP: A RESILIENT ENERGY HARVESTING NOISE AWARE ROUTING PROTOCOL FOR UNDER WA...ijfcstjournal
Underwater detector network is one amongst the foremost difficult and fascinating analysis arenas that open the door of pleasing plenty of researchers during this field of study. In several under water based sensor applications, nodes are square measured and through this the energy is affected. Thus, the mobility of each sensor nodes are measured through the water atmosphere from the water flow for sensor based protocol formations. Researchers have developed many routing protocols. However, those lost their charm with the time. This can be the demand of the age to supply associate degree upon energy-efficient and ascendable strong routing protocol for under water actuator networks. During this work, the authors tend to propose a customary routing protocol named level primarily based routing protocol (LBRP), reaching to offer strong, ascendable and energy economical routing. LBRP conjointly guarantees the most effective use of total energy consumption and ensures packet transmission which redirects as an additional reliability in compare to different routing protocols. In this work, the authors have used the level of forwarding node, residual energy and distance from the forwarding node to the causing node as a proof in multicasting technique comparisons. Throughout this work, the authors have got a recognition result concerning about 86.35% on the average in node multicasting performances. Simulation has been experienced each in a wheezy and quiet atmosphere which represents the endorsement of higher performance for the planned protocol.
Geographic routing protocols for underwater wireless sensor networks a surveyijwmn
Underwater wireless sensor networks (UWSN), similar to the terrestrial sensor networks, have different
challenges such as limited bandwidth, low battery power, defective underwater channels, and high variable
propagation delay. A crucial problem in UWSN is finding an efficient route between a source and a
destination. Consequently, great efforts have been made for designing efficient protocols while considering
the unique characteristics of underwater communication. Several routing protocols are proposed for this
issue and can be classified into geographic and non-geographic routing protocols. In this paper we focus
on the geographic routing protocols. We introduce a review and comparison of different algorithms
proposed recently in the literature. We also presented a novel taxonomy of these routing in which the
protocols are classified into three categories (greedy, restricted directional flooding and hierarchical)
according to their forwarding strategies.
RMEER: Reliable Multi-path Energy Efficient Routing Protocol for Underwater W...IJECEIAES
Underwater Wireless Sensor Networks (UWSNs) is interesting area for researchers. To extract the information from seabed to water surface the the majority numbers of routing protocols has been introduced. The design of routing protocols faces many challenges like deployment of sensor nodes, controlling of node mobility, development of efficient route for data forwarding, prolong the battery power of the sensor nodes, and removal of void nodes from active data forwarding paths. This research article focuses the design of the Reliable Multipath Energy Efficient Routing (RMEER) which develops the efficient route between sensor nodes, and prolongs the battery life of the nodes. RMEER is a scalable and robust protocol which utilizes the powerful fixed courier nodes in order to enhance the network throughput, data delivery ratio, network lifetime and reduces the end-to-end delay. RMEER is also an energy efficient routing protocol for saving the energy level of the nodes. We have used the NS2.30 simulator with AquaSim package for performance analysis of RMEER.We observed that the simulation performance of RMEER is better than D-DBR protocol.
LBRP: A RESILIENT ENERGY HARVESTING NOISE AWARE ROUTING PROTOCOL FOR UNDER WA...ijfcstjournal
Underwater detector network is one amongst the foremost difficult and fascinating analysis arenas that open the door of pleasing plenty of researchers during this field of study. In several under water based sensor applications, nodes are square measured and through this the energy is affected. Thus, the mobility of each sensor nodes are measured through the water atmosphere from the water flow for sensor based protocol formations. Researchers have developed many routing protocols. However, those lost their charm with the time. This can be the demand of the age to supply associate degree upon energy-efficient and ascendable strong routing protocol for under water actuator networks. During this work, the authors tend to propose a customary routing protocol named level primarily based routing protocol (LBRP), reaching to offer strong, ascendable and energy economical routing. LBRP conjointly guarantees the most effective use of total energy consumption and ensures packet transmission which redirects as an additional reliability in compare to different routing protocols. In this work, the authors have used the level of forwarding node, residual energy and distance from the forwarding node to the causing node as a proof in multicasting technique comparisons. Throughout this work, the authors have got a recognition result concerning about 86.35% on the average in node multicasting performances. Simulation has been experienced each in a wheezy and quiet atmosphere which represents the endorsement of higher performance for the planned protocol.
Development of an FHMA-based Underwater Acoustic Communications System for Mu...Waqas Tariq
This paper describes the design of an underwater acoustic communications system for multiple underwater vehicles, based on frequency-hopping multiple-access (FHMA) and tamed spread-spectrum communications. The system makes used of the tamed spread-spectrum method, frequency hopping, 4FSK, and a rake receiver. In order to make the system more practical, the underwater channel and the effect of the number of users on the bit error ratio (BER) are also taken into account. Since the necessary proving experiments are not easily conducted in the ocean, a platform is developed that uses the sound card of a computer, combined with a sound box and microphone, to transduce energy for acoustic communications. Simulated and experimental results indicate that this system could provide reliable underwater communications between multiple underwater vehicles.
STATE-OF-THE-ART OF THE PHYSICAL LAYER IN UNDERWATER WIRELESS SENSOR NETWORKSijwmn
With the current technology revolution, underwater wireless sensor networks (UWSNs) find several applications such as disaster prevention, water quality monitoring, military surveillance and fish farming. Nevertheless, this kind of networks faces a number of challenges induced by the nature of the underwater environment and its influence on the network physical media. Therefore, the ultimate objective of this paper is to lay down the key aspects of the physical layer of the underwater sensor networks (UWSNs). It discusses issues related to the characteristics and challenges of the underwater communication channel, differences between terrestrial wireless sensor networks and UWSNs, and acoustic propagation models in underwater. The paper also surveys some of the underwater acoustic modems. This study is essential to better understand the challenges of designing UWSNs and alleviate their effects.
19 9255 nautical ad hoc network application edit septianIAESIJEECS
High data rate communication in terrestrial wireless scenarios can be accomplished by setting up Base Stations (BS) on the ground. But applying the similar technique to maritime communication may not be suitable because owing to the geographically constrained nature of the ocean, henceforth, MF/HF modems, extensive-distance transmission characteristics with low data-rate are commonly employed in maritime communiqué. Inmarsat is conservatively used in Maritime satellite communiqué in order to reimburse for low data-rate transmission of MF/HF modems, but its main negative aspect is high cost. To improve the transmission speed along with low price, in general, a network whose architecture is similar to Vehicular Adhoc Network (VANET), that permits peer-to-peer transportation without BS, i.e., ad-hoc network is critical. An ad-hoc network for nautical environment named as Nautical Ad-hoc Network (NANET) was proposed. Multiple access and duplexing schemes are used to implement the nautical network for corresponding NANET scenarios.
Design of Underwater wireless optical/acoustic link for reduction of back-sca...theijes
Underwater communication plays a significant role in the study of climate change through ocean monitoring and associated sensor networks. It is severely limited when compared to free space communication because water is essentially opaque to electromagnetic radiation except in the visible band. Even in the visible band, light penetrates only a few hundred meters in the clearest waters and much less in turbid waters due to the presence of suspended sediment or high concentrations of marine life. Consequently, acoustic techniques are been used for underwater communication systems which is relatively mature and robust. Acoustic systems are capable of long range communication. But traditional underwater acoustic communications cannot provide high enough data rates to enable monitoring technology. Optical wireless communications, centred around blue-green wavelengths, are being used as an alternative. Here a hybrid design is being introduced using an optical/acoustic link to reduce back scattering of transmitted light.
Fuzzy based clustering and energy efficientIJCNCJournal
Underwater Wireless Sensor Network (UWSN) is a particular kind of sensor networks which is
characterized by using acoustic channels for communication. UWSN is challenged by great issues specially
the energy supply of sensor node which can be wasted rapidly by several factors. The most proposed
routing protocols for terrestrial sensor networks are not adequate for UWSN, thus new design of routing
protocols must be adapted to this constrain. In this paper we propose two new clustering algorithms based
on Fuzzy C-Means mechanisms. In the first proposition, the cluster head is elected initially based on the
closeness to the center of the cluster, then the node having the higher residual energy elects itself as a
cluster head. All non-cluster head nodes transmit sensed data to the cluster head. This latter performs data
aggregation and transmits the data directly to the base station. The second algorithm uses the same
principle in forming clusters and electing cluster heads but operates in multi-hop mode to forward data
from cluster heads to the underwater sink (uw-sink). Furthermore the two proposed algorithms are tested
for static and dynamic deployment. Simulation results demonstrate the effectiveness of the proposed
algorithms resulting in an extension of the network lifetime.
Performance Analysis of OFDM system using LS, MMSE and Less Complex MMSE in t...AM Publications
In this research, Channel estimation has been accomplished for OFDM framework. In wireless communication, because of a nonappearance of channel estimation a decent execution of communication doesn't accomplish. Also, it is critical for wireless communication that transmission of information at high rate and transmission with least mistake could conceivable. Such a variety of times in remote correspondence, abundance of a sign get vacillated. This variance influences the execution of wireless communication. So to beat these issues channel estimation is essential. In channel estimation pilots get joined with transmitting information, and this consolidated data goes through channel and reaches at recipient. At accepting side estimation get perform with the assistance of those pilots. OFDM have a significance in remote correspondence as OFDM gives high rate of data, additionally it gives low multipath contortion, these properties are essential to increase great execution of remote correspondence. This is motivation to choose OFDM in this study. This concentrate essentially thinks about three distinct calculations for divert estimation in OFDM framework. Likewise this study contrasts these calculations and traditional OFDM. This study utilizes comb type pilot insertion method, and this procedure is extremely valuable to diminish the impact of fast fading in wireless communication environment.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Development of an FHMA-based Underwater Acoustic Communications System for Mu...Waqas Tariq
This paper describes the design of an underwater acoustic communications system for multiple underwater vehicles, based on frequency-hopping multiple-access (FHMA) and tamed spread-spectrum communications. The system makes used of the tamed spread-spectrum method, frequency hopping, 4FSK, and a rake receiver. In order to make the system more practical, the underwater channel and the effect of the number of users on the bit error ratio (BER) are also taken into account. Since the necessary proving experiments are not easily conducted in the ocean, a platform is developed that uses the sound card of a computer, combined with a sound box and microphone, to transduce energy for acoustic communications. Simulated and experimental results indicate that this system could provide reliable underwater communications between multiple underwater vehicles.
STATE-OF-THE-ART OF THE PHYSICAL LAYER IN UNDERWATER WIRELESS SENSOR NETWORKSijwmn
With the current technology revolution, underwater wireless sensor networks (UWSNs) find several applications such as disaster prevention, water quality monitoring, military surveillance and fish farming. Nevertheless, this kind of networks faces a number of challenges induced by the nature of the underwater environment and its influence on the network physical media. Therefore, the ultimate objective of this paper is to lay down the key aspects of the physical layer of the underwater sensor networks (UWSNs). It discusses issues related to the characteristics and challenges of the underwater communication channel, differences between terrestrial wireless sensor networks and UWSNs, and acoustic propagation models in underwater. The paper also surveys some of the underwater acoustic modems. This study is essential to better understand the challenges of designing UWSNs and alleviate their effects.
19 9255 nautical ad hoc network application edit septianIAESIJEECS
High data rate communication in terrestrial wireless scenarios can be accomplished by setting up Base Stations (BS) on the ground. But applying the similar technique to maritime communication may not be suitable because owing to the geographically constrained nature of the ocean, henceforth, MF/HF modems, extensive-distance transmission characteristics with low data-rate are commonly employed in maritime communiqué. Inmarsat is conservatively used in Maritime satellite communiqué in order to reimburse for low data-rate transmission of MF/HF modems, but its main negative aspect is high cost. To improve the transmission speed along with low price, in general, a network whose architecture is similar to Vehicular Adhoc Network (VANET), that permits peer-to-peer transportation without BS, i.e., ad-hoc network is critical. An ad-hoc network for nautical environment named as Nautical Ad-hoc Network (NANET) was proposed. Multiple access and duplexing schemes are used to implement the nautical network for corresponding NANET scenarios.
Design of Underwater wireless optical/acoustic link for reduction of back-sca...theijes
Underwater communication plays a significant role in the study of climate change through ocean monitoring and associated sensor networks. It is severely limited when compared to free space communication because water is essentially opaque to electromagnetic radiation except in the visible band. Even in the visible band, light penetrates only a few hundred meters in the clearest waters and much less in turbid waters due to the presence of suspended sediment or high concentrations of marine life. Consequently, acoustic techniques are been used for underwater communication systems which is relatively mature and robust. Acoustic systems are capable of long range communication. But traditional underwater acoustic communications cannot provide high enough data rates to enable monitoring technology. Optical wireless communications, centred around blue-green wavelengths, are being used as an alternative. Here a hybrid design is being introduced using an optical/acoustic link to reduce back scattering of transmitted light.
Fuzzy based clustering and energy efficientIJCNCJournal
Underwater Wireless Sensor Network (UWSN) is a particular kind of sensor networks which is
characterized by using acoustic channels for communication. UWSN is challenged by great issues specially
the energy supply of sensor node which can be wasted rapidly by several factors. The most proposed
routing protocols for terrestrial sensor networks are not adequate for UWSN, thus new design of routing
protocols must be adapted to this constrain. In this paper we propose two new clustering algorithms based
on Fuzzy C-Means mechanisms. In the first proposition, the cluster head is elected initially based on the
closeness to the center of the cluster, then the node having the higher residual energy elects itself as a
cluster head. All non-cluster head nodes transmit sensed data to the cluster head. This latter performs data
aggregation and transmits the data directly to the base station. The second algorithm uses the same
principle in forming clusters and electing cluster heads but operates in multi-hop mode to forward data
from cluster heads to the underwater sink (uw-sink). Furthermore the two proposed algorithms are tested
for static and dynamic deployment. Simulation results demonstrate the effectiveness of the proposed
algorithms resulting in an extension of the network lifetime.
Performance Analysis of OFDM system using LS, MMSE and Less Complex MMSE in t...AM Publications
In this research, Channel estimation has been accomplished for OFDM framework. In wireless communication, because of a nonappearance of channel estimation a decent execution of communication doesn't accomplish. Also, it is critical for wireless communication that transmission of information at high rate and transmission with least mistake could conceivable. Such a variety of times in remote correspondence, abundance of a sign get vacillated. This variance influences the execution of wireless communication. So to beat these issues channel estimation is essential. In channel estimation pilots get joined with transmitting information, and this consolidated data goes through channel and reaches at recipient. At accepting side estimation get perform with the assistance of those pilots. OFDM have a significance in remote correspondence as OFDM gives high rate of data, additionally it gives low multipath contortion, these properties are essential to increase great execution of remote correspondence. This is motivation to choose OFDM in this study. This concentrate essentially thinks about three distinct calculations for divert estimation in OFDM framework. Likewise this study contrasts these calculations and traditional OFDM. This study utilizes comb type pilot insertion method, and this procedure is extremely valuable to diminish the impact of fast fading in wireless communication environment.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
ENERGY EFFICIENT ROUTING ALGORITHM FOR VOID AVOIDANCE IN UWSN USING RESIDUAL ...IJCNCJournal
Abstract. Underwater Wireless Sensor Networks (UWSN) is attracting the interest of most of the researcher because of the good opportunity to discover and catch the oceanic activities. As we know radio waves could not work efficiently in Underwater so Underwater Acoustic Sensor Networks (UASN) emerged as a most prevalent network to an outstanding range. UASN have some constraints in its deployment as well as acoustic wave communication. This limitation involves large propagation delay, transmission cost, very less bandwidth, high signal attenuation, and restricted accessibility of the nodes and non-availability of the recharging of nodes leads to the development of some energy saving algorithms to prolong the lifetime of the nodes. Routing technique must be rich enough to overcome all these constraints and give an energyefficient path by avoiding void regions and increase the network lifetime. Depth based algorithms proposed in the last decades use depth factor to estimate the path from sender to the sink. By having the holding time calculation they minimize the replication of information. Here, this per have proposed Energy Efficient Void Avoidance Routing Scheme for UWSN (E2RV) using Residual Energy and Depth Variance it used two hop node information to escape the void shacks in the network area along with this it is using regularized remaining energy and normalized depth of the nodes to estimate the path from data generating node to sink
node. In this way E2RV not only removing the void holes but also maintains the energy depletion of the network nodes and upsurge the network lifetime. Simulation results show the improvement of E2RV over previously defined algorithms in terms of packet delivery ratio, duplications, less energy depletion and increased lifetime.
Priority based energy efficient hybrid cluster routing protocol for underwate...IJECEIAES
A little change in the environment that goes unnoticed in an underwater communication network might lead to calamity. A little alteration in the environment must also be adequately analyzed in order to deal with a potential crisis. A priority-based routing protocol is required to ensure that the vital data perceived by the sensor about the environment changes. The priority-based routing system guarantees that vital data packets are delivered at a quicker pace to the destination or base station for further processing. In this work, we present a priority-based routing protocol based on the energy efficient hybrid cluster routing protocol (EEHRCP) algorithm. The suggested approach keeps two distinct queues for lower and higher priority data packets. In order to ensure that these packets get at their destination without any information loss and at a quicker rate, all of the crucial sensed data is passed through a higher priority queue. Test findings show that the suggested technique increases throughput, delivery percentage, and reduces latency for the crucial data packets.
The Underwater Sensor Network (UWSN) is main interesting area due to its most valuable
applications like: disaster preventions, distributed tactical surveillance, undersea exploration, seismic
monitoring, environmental monitoring and many more. The design of energy efficient routing protocol
however is a challenging issue because in underwater environment the batteries of the sensor nodes
cannot be recharged easily. Majority of the researchers have adapted the terrestrial WSN methodologies
to overcome this problem but in underwater environment the terrestrial WSN approach is not feasible due
to the acoustic signaling and water current. This research paper focuses the key limitation of the current
energy efficient routing protocols. The simulation results with comparative analysis for energy efficient
routing protocols are also presented in this research article; which helps the researchers to find the further
research gap in the field of energy efficient routing protocols.
LBRP: A RESILIENT ENERGY HARVESTING NOISE AWARE ROUTING PROTOCOL FOR UNDER WA...ijfcstjournal
Underwater detector network is one amongst the foremost difficult and fascinating analysis arenas that open the door of pleasing plenty of researchers during this field of study. In several under water based
sensor applications, nodes are square measured and through this the energy is affected. Thus, the mobility of each sensor nodes are measured through the water atmosphere from the water flow for sensor based protocol formations. Researchers have developed many routing protocols. However, those lost their charm with the time. This can be the demand of the age to supply associate degree upon energy-efficient and ascendable strong routing protocol for under water actuator networks. During this work, the authors tend to propose a customary routing protocol named level primarily based routing protocol (LBRP), reaching to offer strong, ascendable and energy economical routing. LBRP conjointly guarantees the most effective use of total energy consumption and ensures packet transmission which redirects as an additional reliability in compare to different routing protocols. In this work, the authors have used the level of forwarding node, residual energy and distance from the forwarding node to the causing node as a proof in multicasting technique comparisons. Throughout this work, the authors have got a recognition result concerning about
86.35% on the average in node multicasting performances. Simulation has been experienced each in a wheezy and quiet atmosphere which represents the endorsement of higher performance for the planned protocol.
LBRP: A RESILIENT ENERGY HARVESTING NOISE AWARE ROUTING PROTOCOL FOR UNDER WA...ijfcstjournal
Underwater detector network is one amongst the foremost difficult and fascinating analysis arenas that
open the door of pleasing plenty of researchers during this field of study. In several under water based
sensor applications, nodes are square measured and through this the energy is affected. Thus, the mobility
of each sensor nodes are measured through the water atmosphere from the water flow for sensor based
protocol formations. Researchers have developed many routing protocols. However, those lost their charm
with the time. This can be the demand of the age to supply associate degree upon energy-efficient and
ascendable strong routing protocol for under water actuator networks. During this work, the authors tend
to propose a customary routing protocol named level primarily based routing protocol (LBRP), reaching to
offer strong, ascendable and energy economical routing. LBRP conjointly guarantees the most effective use
of total energy consumption and ensures packet transmission which redirects as an additional reliability in
compare to different routing protocols. In this work, the authors have used the level of forwarding node,
residual energy and distance from the forwarding node to the causing node as a proof in multicasting
technique comparisons. Throughout this work, the authors have got a recognition result concerning about
86.35% on the average in node multicasting performances. Simulation has been experienced each in a
wheezy and quiet atmosphere which represents the endorsement of higher performance for the planned
protocol.
Survey on Energy-Efficient Routing Algorithms for Underwater Wireless Sensor ...Editor IJCATR
In underwater environment, for retrieval of information the routing mechanism is used. In routing mechanism there are three to four types of nodes are used, one is sink node which is deployed on the water surface and can collect the information, courier/super/AUV or dolphin powerful nodes are deployed in the middle of the water for forwarding the packets, ordinary nodes are also forwarder nodes which can be deployed from bottom to surface of the water and source nodes are deployed at the seabed which can extract the valuable information from the bottom of the sea. In underwater environment the battery power of the nodes is limited and that power can be enhanced through better selection of the routing algorithm. This paper focuses the energy-efficient routing algorithms for their routing mechanisms to prolong the battery power of the nodes. This paper also focuses the performance analysis of the energy-efficient algorithms under which we can examine the better performance of the route selection mechanism which can prolong the battery power of the node
Effective Pipeline Monitoring Technology in Wireless Sensor NetworksIJTET Journal
Wireless detector nodes are a promising technology to play three-dimensional applications. Even it
will sight correct lead to could on top of ground and underground. In solid underground watching system makes
some challenges are there to propagating the signals. The detector node is moving entire the underground
pipeline and sending information to relay node that's placed within the on top of ground. If any relay node is
unsuccessful during this condition suggests that it'll not sending the info. In this watching system can specially
designed as a heterogeneous networks. Every high power relay nodes most covers minimum 2 low power relay
node. If any relay node is unsuccessful within the network, the constellation can modification mechanically
supported the heterogeneous network. The high power relay node is change the unsuccessful node and sending
the condition of pipeline. The benefits are thought-about to be extremely distributed, improved packet delivery
An implementation of_partial_transmit_seWaleed Raza
In this article we research about underwater
acoustics transceivers. As Underwater acoustic transceivers
consume more power than Radio frequency transceivers.
The techniques which are being utilized in radio frequency
cannot be implemented directly in underwater acoustic
system it needs to be re investigated to design new methods.
To achieve reliable acoustic data transmission new
techniques should be achieved or the traditional
Orthogonal frequency divisional multiplexing techniques
should be revised. The power consumption also relies upon
underwater acoustic signal propagation and transmission
distances. Several underwater acoustic applications require
long-term monitoring of the sea. For the battery powered
modems, it becomes very serious problem. By designing an
Energy efficient OFDM Communication system we can
solve this problem. We study about peak to average power
ratio in an Orthogonal frequency divisional multiplexing
system by reducing the major draw-back of OFDM system.
The PAPR reduction utilized in this paper is Partial
Transmit Sequences for underwater acoustic OFDM
communication system which has lesser complexity. The
results have provided better performance in underwater
acoustic OFDM communication system.
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Elevating Tactical DDD Patterns Through Object Calisthenics
Dz34765771
1. Shreyas M.S, Prof. D. Jayaramaiah / International Journal of Engineering Research and
Applications (IJERA) ISSN: 2248-9622 www.ijera.com
Vol. 3, Issue 4, Jul-Aug 2013, pp.765-771
765 | P a g e
Anti-Void Traversal Mechanism Using Pressure Routing For
Underwater Sensor Networks
Shreyas M.S1
, Prof. D. Jayaramaiah2
1
M.Tech Student,
2
Head of the dept,
Department of Information Science Engineering The Oxford College of Engineering VTU Bangalore, India
Abstract
Underwater acoustic sensor networks
have recently been proposed as a way to explore
and capture oceanographic data to monitor
underwater environments. A specialized
geographic routing problem called pressure
routing that directs a packet to any sonobuoys on
the surface based on depth information available
from on-board pressure gauges. In this respect,
the efficient handling of void areas in the acoustic
network is the main challenge of pressure
routing. It was recently proven that the greedy
stateless perimeter routing method, very popular
in terrestrial networks, cannot be extended to
void recovery in acoustic networks. In order to
remedy this problem, the existing protocol Depth
based routing is enhanced. The proposed solution
takes advantage of what is already inherited as a
natural part of geographic routing to provide
clues on the routing direction for data packets
with minimal overhead to navigate around the
voids. The proposed solution that uses depth
information, sequence number and hop count
and exploits opportunistic beacon packet
receptions to circumvent void areas and
efficiently progress towards the destination when
choosing forwarding nodes the proposed solution
follows this direction by embedding small
amounts of trace routing data in each beaconing
packet to inform neighboring nodes about the
broadcasting node’s status as a local maxima or
dead end node and avoid routing to nodes which
may lead to a void in the network.
Index Terms— Pressure Routing, Geographic
Routing, Opportunistic data forwarding, Any-cast
Routing.
I. INTRODUCTION
Underwater sensor networks (UWSNs)
communications are becoming increasingly
important, with numerous applications emerging in
military tactical surveillance applications,
oceanographic data collection environmental and
pollution monitoring [1], [2]. Underwater acoustic
networking is the enabling technology for these
applications. In underwater networks, to perform
collaborative monitoring tasks over a given area a
variable number of sensors and vehicles that are
deployed forming a sea Swarm (Sensor Equipped
Aquatic Swarm) that moves as a group with water
current [3], [4]. Each sensor is equipped with a low
bandwidth acoustic modem and with various sensors
(e.g., Drogues [5]). Moreover, it can control its
depth through a fish-like bladder apparatus and a
pressure gauge. The swarm is escorted by sonobuoys
at the sea surface that are equipped with both
acoustic and radio (e.g., Wi-Fi or Satellites)
communications and GPS (See Fig 1).
Fig 1: Sea swarm architecture
Our goal in this paper is to design an
efficient any cast routing protocol for underwater
data collection that addresses several challenges that
are unique to underwater communications like the
underwater acoustic channel is prone to packet
losses and severely constrained by long propagation
latency and low bandwidth (usually less than
100Kbps) [16] and collisions in a congested
network. Energy efficiency is a critical factor as
well, given that acoustic transmissions consume far
more energy than terrestrial radio communications
(reception to transmission power ratio of 1:125
[17]).
The existing terrestrial routing protocols
(e.g., OLSR [14], DSDV [12], AODV [11], DSR
[13]) can be modified in mobile underwater
networks to support any-cast routing. This approach
has few shortcomings: (1) it is challenging to
incorporate opportunistic forwarding mechanisms
(e.g., ExOR [9], LCOR [10]) into the stateful routing
protocols due to node mobility (2) these protocols
require frequent systematic flooding and route
2. Shreyas M.S, Prof. D. Jayaramaiah / International Journal of Engineering Research and
Applications (IJERA) ISSN: 2248-9622 www.ijera.com
Vol. 3, Issue 4, Jul-Aug 2013, pp.765-771
766 | P a g e
maintenance with neighboring nodes, which are very
expensive operations under water.
In Acoustic networks, recent researches
has been directed to geographic routing because it
does not require any link state exchanges or route
maintenances (i.e., stateless and localized). Another
key advantage of geographic routing is that it
enables localized geo-opportunistic forwarding; i.e.,
a subset of nodes that have correctly received the
packet can collaboratively schedule a packet
transmission to maximize its progress toward the
destination [15]. Note that our geographic routing
problem is specialized in that it is any-cast to any
buoy on the surface. Thus, it suffices to route a
packet upwards to shallower depths. Given that the
onboard hydraulic pressure gauge can accurately
estimate depth (avg. error < 1m ), we can use depth
information for geographic any-cast routing (called
pressure routing).
A simple greedy pressure routing often fails
in sparse underwater networks due to the presence
of void Nodes — packets must be routed around
such routing holes. As depicted in Fig. 2, a data
packet originating from node c may eventually be
routed to a local maximum node g when greedily
forwarded based on depth (via path P1). Node g
cannot make any progress toward the surface
because it does not have any neighboring node with
depth shallower than its own. Node g must thus
perform a route recovery process to get around the
void via path P2. For Underwater networks, there is
no efficient routing algorithm that delivers messages
deterministically even in the presence of void nodes.
Therefore several recovery methods was proposed
such as 2D void surface flooding and random walks
[15]. These methods also have a drawback: some of
the nodes around a void area will eventually route
packets to local maxima (called trapped nodes, e.g.,
node i and h in Fig. 1), and any nodes located
beneath the trapped nodes can potentially suffer
from route hop stretch because local greedy
forwarding may lead packets to local maxima and
then invoke fallback mechanisms. For example in
Fig.2, node c’s packet is greedily forwarded to the
local maxima via path P1 and then is re-routed via
path P2 (total 7 hops), whereas this packet can be
directly delivered via path P3 (total 3 hops). Note
that these problems will be more pronounced when
the number of sonobuoys is sparse or when node
density is low. This drawback of pressure routing is
inherently due to the nodes’ blindness to the network
topology, as they make localized routing decisions.
Fig. 2. Greedy Pressure Routing.
In this paper, pressure routing is improved
by providing nodes with a partial view of the
network topology such that greedy pressure routing
is guided by soft-state breadcrumbs (i.e., up/down
directions) from the sonobuoys. This soft-state
breadcrumb approach, which exploits periodic
beaconing to build directional trails toward the
surface nodes utilize geo-opportunistic forwarding
along the directional trails.
The rest of the paper in organized as
follows. In section II, review the related work in
field. In section III, provide a detailed description of
proposed techniques. In section IV, provide a details
about parameters used for simulation and validate
the performance of proposed approach by comparing
it with existing approach. In section V, conclude the
paper.
II. RELATED WORK
Underwater Sensor Networks are attracting
the attention of industry and academia as well [15].
At one side, it can enable a wide range of aquatic
applications, and on the same time, adverse
environmental conditions create a range of
challenges for underwater communication and
networking. Major challenges in the design of
underwater acoustic networks are:
Battery power is limited and usually
batteries cannot be recharged, because solar
energy cannot be exploited;
Channel characteristics, including long and
variable propagation delays, multi-path and
fading problems;
The available bandwidth is severely
limited;
High bit error rates;
Underwater sensors are prone to failures
because of fouling, corrosion, etc.
The main issues for development for routing
protocols for underwater sensor network.
Harsh deployment environment is the major
challenging factor which comes under
routing protocol for underwater sensor
network.
Bandwidth capacity is low because routing
protocol for underwater sensor network
comes from high bit error rates.
3. Shreyas M.S, Prof. D. Jayaramaiah / International Journal of Engineering Research and
Applications (IJERA) ISSN: 2248-9622 www.ijera.com
Vol. 3, Issue 4, Jul-Aug 2013, pp.765-771
767 | P a g e
Node mobility is also another concern
which comes under routing protocol for
underwater sensor network because if they
are not anchored at the bottom of the sea.
This situation conclusion in a dynamic
topology
Radio single are not efficient compare to
routing protocol for underwater sensor
network. Because it provides high
propagation delays.
High propagation delays are the major
factor of routing protocol for underwater
sensor network.
The applications for underwater acoustic sensor
networks:
Environmental monitoring. UW-ASNs can
perform pollution monitoring (chemical,
biological and nuclear). For example, it
may be possible to detail the chemical
slurry of antibiotics, estrogen-type
hormones and insecticides to monitor
streams, rivers, lakes and ocean bays (water
quality in situ analysis). Monitoring of
ocean currents and winds, improved
weather forecast, detecting climate change,
under-standing and predicting the effect of
human activities on marine ecosystems,
biological monitoring such as tracking of
fishes or micro-organisms, are other
possible applications. For example, in [16],
the design and construction of a simple
underwater sensor network is described to
detect extreme temperature gradients
(thermoclines), which are considered to be
a breeding ground for certain marine micro-
organisms.
Undersea explorations. Underwater sensor
networks can help detecting underwater
oilfields or reservoirs, determine routes for
laying undersea cables, and assist in
exploration for valuable minerals.
Disaster prevention. Sensor networks that
measure seismic activity from remote
locations can provide tsunami warnings to
coastal areas, or study the effects of
submarine earthquakes (seaquakes).
Assisted navigation. Sensors can be used to
identify hazards on the seabed, locate
dangerous rocks or shoals in shallow
waters, mooring positions, submerged
wrecks, and to perform bathymetry
profiling.
Underwater Routing Protocols: Vector-Based
Forwarding (VBF) [6] prescribes that packets be
forwarded to the nodes that are located within a
route of the given width between the source and the
destination. This relay selection algorithm saves
energy consumption by reducing the number of
packet relays. Note that there are also geographic
routing protocols that exploit the opportunistic
forwarding features in underwater environments [7].
Pressure Routing: Yan et al. proposed a greedy
any-cast routing solution called Depth Based
Routing (DBR) [8]. They suggested that packet
forwarding decisions be made locally based on the
pressure (or depth) level measured at each node.
Packets would then be geographically forwarded to
nodes with shallower depth in a greedy fashion
toward the water surface. DBR exploits the
simultaneous packet reception induced by the
broadcast nature of the wireless medium and
performs opportunistic greedy forwarding via a
subset of the neighbors that have received the packet
correctly. However, DBR lacks an efficient
forwarding set selection method and a recovery
method from local maxima. Therefore, recent
research in underwater networks has been directed to
position-based or geographic routing because it does
not require any link state exchanges or route
maintenances (i.e., stateless and localized). Thus, it
suffices to route a packet upwards to shallower
depths. Given that the onboard hydraulic pressure
gauge can accurately estimate depth, we can use
depth information for geographic any-cast routing
(called pressure routing).
Opportunistic Routing: Most opportunistic routing
protocols (also called any-path routing) such as
ExOR [9], Least Cost Opportunistic Routing
(LCOR) [10], which do not use geographic
information, require global topology and link quality
information (like link state routing) to find a set of
forwarding groups toward the destination; thus, they
are more suitable for static wireless mesh or sensor
networks. In practice, geographic routing can also
benefit from opportunistic forwarding, as in
Geographic Random Forwarding (GeRaF) [13],
Contention Based Forwarding (CBF) [14], and
Focused Beam Routing (FBR) [15], though these
methods are not optimal due to lack of global
knowledge. In the literature, researchers have
typically used a geometric shape (e.g., a
triangle/cone [14], [15]) that is faced toward the
destination for forwarding set selection to prevent
hidden terminal problems.
III. PROPOSED TECHNIQUES
The proposed Anti-Void (AV) technique
consists of three components, namely Routing
Initialization, Enhanced Periodic Beaconing and
Opportunistic directional data forwarding.
A. Routing Initialization
The Sonobuoys uses Enhanced Periodic
Beaconing method to propagate their reachability
information to sensor nodes. Each node’s beacon is
augmented with additional information, namely the
NodeID (), sender’s depth π() (or pressure
level), hop count to a sonobuoys hop_count(),
4. Shreyas M.S, Prof. D. Jayaramaiah / International Journal of Engineering Research and
Applications (IJERA) ISSN: 2248-9622 www.ijera.com
Vol. 3, Issue 4, Jul-Aug 2013, pp.765-771
768 | P a g e
sequence number seq_num() and its current data
forwarding direction DF_dir() (toward the surface).
When receiving the augmented beacons from
predecessors, each node updates its variables,
namely minimal hop to the surface, sequence
number, data forwarding direction, and next-hop
data forwarding direction NDF_dir() (i.e.,
predecessor’s data forwarding direction).
B. Enhanced Periodic Beaconing
In the beginning, every sonobuoys on the
surface initializes these variables and starts
beaconing. After receiving a beacon message, a node
can tell whether it has received the message from
deeper or shallower depth, and each node sets its
data forwarding direction toward the surface. The
direction is set as up when a beacon is received from
a shallower depth node; otherwise, it is set as down.
When multiple direction cues from different
sonobuoys are received, the direction cue with the
minimal hop count is chosen. Also, a node’s next-
hop data forwarding direction is set based on the
beacon sender’s data forwarding direction. For
instance, in Fig. 2, since node d/e receives a beacon
message from a shallower depth node, it sets its data
forwarding direction and next-hop data forwarding
direction as up-up, respectively. In contrast, when
node I receives a beacon message from a deeper
depth node (i.e., node d), it sets its data forwarding
direction and next hop data forwarding direction as
down-up, respectively. After updating its local
states, each node prepares a beacon message to
broadcast by incrementing the hop count and setting
its current depth, data forwarding direction, and
sequence number. This beaconing process will
repeat, and thus, nodes essentially build directional
trails toward their closes sonobuoys on the surface.
Note that a direction change is caused by voids; e.g.,
in Fig. 2, path P3 has only a single direction (up),
whereas path P2 experiences a direction change due
to the void (down and up).
Fig. 3. Enhanced Periodic Beaconing
In a beacon message, nodes embed their
local states, namely current hop-count, sequence
number, depth, and data forwarding direction. To
minimize the chance of collisions and
synchronization, nodes add random jitters for
periodic beaconing using timers when they broadcast
beacon messages; then, the nodes set up a new
timeout for the next beaconing. After receiving a
beacon message, each node checks the validation of
the received beacon by checking the sequence
number (increasing) and hop-count (smaller), and
each node sets its data forwarding direction and
updates its next-hop data forwarding direction. As
illustrated earlier, the direction is set as up if a
beacon message is received from a shallower depth
node; otherwise, it is set as down. After the data
forwarding direction is set, a node’s next-hop data
forwarding direction is also updated based on the
data forwarding direction of the beacon sender. Note
that when multiple direction cues from different
sonobuoys are received, the direction cue with
minimal hop count is deterministically chosen.
Fig. 3 shows an example to illustrate
beacon propagation. The sonobuoys initializes a
beacon message after the beacon timer has expired
and then broadcasts the beacon message with the
sequence number (= 0), depth (= 0), data forwarding
direction (=up), and hop count (= 0). Node a
receives the beacon and finds that it is a new beacon
with a higher sequence number and sets its status
(e.g., seq_num = 0 with incremented hop_count(a) =
1). By comparing the depth, node a sets DF_dir(a)
as up, and NDF_dir(a) (i.e., the sonobuoys data
forwarding direction) as up. Node a will broadcast
an updated beacon, and node b will perform a
similar procedure, which will be continued. Later,
node x receives a beacon message from node b; it
then updates DF_dir(x) as down based on the depth
difference and NDF_dir(x) as DF_dir(b) = up. Node
x will broadcast an updated beacon message. After
these changes are announced via a beacon message,
node y receives the beacon message and will
maintain DF_dir(y) and NDF_dir(y) as down-down.
On the basis of this beacon and update process,
nodes will set up a set of directional trails toward
any one of the sonobuoys. When multiple direction
cues from different sonobuoys are received,
direction flapping may occur. Then proposed
solution uses the sequence number and hop count to
prevent such flapping.
C. Opportunistic Directional Data
Forwarding
The nodes forward data packets solely
based on the data forwarding direction (DF_dir) and
next-hop data forwarding direction (NDF_dir). Each
node sets up the data forwarding direction (either up
or down) that is the opposite direction of the beacon
reception direction. If this direction is up, we use
5. Shreyas M.S, Prof. D. Jayaramaiah / International Journal of Engineering Research and
Applications (IJERA) ISSN: 2248-9622 www.ijera.com
Vol. 3, Issue 4, Jul-Aug 2013, pp.765-771
769 | P a g e
greedy upward forwarding; otherwise, we use
greedy downward forwarding. As the data packet is
forwarded upward beneath the concave area of
voids, a change of data forwarding direction is
inevitable. Data forwarding direction alone cannot
provide sufficient information to route packets to the
destination. In conjunction, we use the next-hop data
forwarding direction, which was the predecessor’s
data forwarding direction during beacon propagation
and now becomes the next-hop’s data forwarding
direction. The forwarding node uses the next-hop’s
data forwarding direction as an additional direction
constraint to ensure that routing properly follows the
direction trails; i.e., among all neighboring nodes, a
neighboring nodes whose data forwarding directions
are equal to the next-hop data forwarding direction
of the current node. Therefore, there are only four
possible cases of data forwarding and next-hop data
forwarding direction setting: up-up, down-down,
down-up, and up-down.
Consider an example scenario depicted in
Fig. 4. In particular, let us take a look at the nodes a,
b, and x. Here, node x is a trapped node that
eventually delivers packets to the local maximum
via greedy upward forwarding. DF_dir and NDF_dir
of nodes a and b are up-up, whereas those of node x
are dn-up. Let us say that there is a packet to send in
node b. Node b’s DF_dir is up and will consider
nodes whose depth is shallower than that of node b,
namely nodes a and x. Since node x’s DF_dir
(down) does not match with that of NDF_dir (up),
the trapped node x is filtered out, and node a is only
considered as a forwarding candidate for local
greedy “upward” forwarding.
Fig. 4. Opportunistic Directional Data Forwarding
IV. SIMULATIONS
Simulation setup
A simulation is performed on set of network
topologies with varying number of sensor nodes.
The nodes will be allowed to move over the network
location. Meanwhile, additional 4 nodes are
deployed on the upper surface of the region to
simulate the presence of Sonobuoys (sink node) and
assumption that these Sonobuoys will be static.
The parameters which are considered in the
simulation are listed in the table below
Simulation results
The network connectivity is analysed first
and its impact on the performance of greedy
forwarding under different node and sonobuoys
densities. Comparative study between the proposed
solution and existing DBR protocol [8] is made.
Extensive simulation results show that proposed
solution outperforms existing DBR protocol.
Fig. 5: Energy consumption per message
Fig. 5 shows the average energy
consumption per message. Energy consumption per
message decreases as the number of deployed nodes
increases. A higher number of deployed nodes
consequently can yield more chances for greedy
upward forwarding to succeed without requiring a
route recovery process to reach any of the
sonobuoys, resulting in less energy consumption per
message.
PARAMETER VALUE
Area 800m * 800m
Simulation Time 120 sec
Number of nodes 50-300
Number of Sink Nodes 4
Transmission Range 200m
Initial battery pack 1000 J
Tx Power 20 W [17]
Rx Power 600 mW [17]
Idle Mode Power 5 mW
Data rate 100 Kbps
Packet size 500 Kb
6. Shreyas M.S, Prof. D. Jayaramaiah / International Journal of Engineering Research and
Applications (IJERA) ISSN: 2248-9622 www.ijera.com
Vol. 3, Issue 4, Jul-Aug 2013, pp.765-771
770 | P a g e
Fig 6: Packet Delivery Ratio
Fig. 6 shows the average packet delivery
ratio. As the number of nodes increases probability
of error occurred during routing will be less.
Although a packet may reach the sinks multiple
times, these redundant packets are considered as
only one distinct packet.
V. CONCLUSION
In this paper, the proposed solution which
exploits periodic beaconing to build directional path
towards the surface by avoiding void regions and
features opportunistic directional forwarding for
packet delivery. The extensive simulations showed
that proposed solution outperforms existing scheme
by significantly lowering the frequency of recovery
fall-backs and by reducing the energy consumption.
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Authors Profile
Shreyas M.S is currently Pursuing
Master of Technology in Computer
Network Engineering from The
Oxford College of Engineering under
Visvesvaraya Technological
University (VTU), India and has
received the Bachelor of Engineering
in Information Science and
Engineering in 2011 from VTU,
India. His area of interest is
Terrestrial and Acoustic Wireless
Sensor Networks.
7. Shreyas M.S, Prof. D. Jayaramaiah / International Journal of Engineering Research and
Applications (IJERA) ISSN: 2248-9622 www.ijera.com
Vol. 3, Issue 4, Jul-Aug 2013, pp.765-771
771 | P a g e