scholarly journals LECAR: Location Estimation-Based Congestion-Aware Routing Protocol for Sparsely Deployed Energy-Efficient UAVs

Sensors ◽  
2021 ◽  
Vol 21 (21) ◽  
pp. 7192
Author(s):  
Imtiaz Mahmud ◽  
You-Ze Cho

Energy-efficient routing has become a critical issue for advanced energy-hungry unmanned aerial vehicles (UAVs). Routing in a flying ad hoc network is always challenging and becomes even more critical when a small number of UAVs must cover a large area. The routing protocols based on the delay-tolerant network (DTN) are best suited for such scenarios. However, traditional DTN-based routing protocols depend on data dissemination to offer a better packet delivery ratio, leading to congestion and excess transmissions, causing heavy and unnecessary energy consumption. We propose a location estimation-based congestion-aware routing protocol (LECAR) to balance these two issues. Considering outdated location information, LECAR takes advantage of the mobility model to estimate the current location of the destination. In addition, LECAR routes a packet by considering both the distance to destination and buffer occupancy of the neighboring UAVs. Simulation results show that LECAR could ensure both a high packet delivery ratio and low energy consumption. Moreover, LECAR could provide a minimal number of transmissions, while minimizing the number of copies per packet at a time.

2019 ◽  
Vol 9 (14) ◽  
pp. 2896 ◽  
Author(s):  
Md Arafat Habib ◽  
Sangman Moh

Wireless sensor networks (WSNs) have become an important and promising technology owing to their wide range of applications in disaster response, battle field surveillance, wildfire monitoring, radioactivity monitoring, etc. In WSNs, routing plays a significant role in delivery latency, energy consumption, and packet delivery ratio. Furthermore, as these applications are used in critical operations with limited irreplaceable batteries, routing protocols are required to be flawless as well as energy efficient. The dynamic environment also requires intelligent and adaptive routing. Game theory is widely used for designing routing protocols in WSNs to achieve not only reduced energy consumption but also increased packet delivery ratio. The core features of efficiently designed game theory-based routing protocols include optimal cluster head selection in hierarchical routing, energy-efficient and delay-aware route discovery, fault-tolerant data delivery, and coalition forming and grouping among nodes for stringent data transfer. In this paper, different routing protocols based on various types of games are extensively reviewed, which have been reported so far for improving energy consumption, delay, route establishment time, packet delivery ratio, and network lifetime. The different game theory-based routing protocols are qualitatively compared with each other in terms of major features, advantages, limitations, and key characteristics. For each protocol, possible applications and future improvements are summarized. Certain important open concerns and challenges are also discussed, along with future research directions.


Author(s):  
Irfan Ahmad ◽  
Fahad Masood ◽  
Arbab Wajid Ullah Khan

In Mobile Ad hoc Networks (MANET) nodes often change their location independently where neither fixed nor centralized infrastructure is present. Nodes communicate with each other directly or via intermediate nodes. The advantages of the MANET layout lead to self-structure and compatibility to most important functions such as traffic distribution and load balancing. Whenever the host moves rapidly in the network the topology becomes updated due to which the structure of MANET varies accordingly. In the literature, different routing protocols have been studied and compared by researchers. Still, there are queries regarding the performance of these protocols under different scenarios. MANETs are not based on a predesigned structure. In this paper, the performance assessment of the Quality of Services (QoS) for different protocols such as Ad hoc On-Demand Distance Vector (AODV), Temporally Ordered Routing Algorithm (TORA) and Zone Routing Protocol (ZRP) in the existence of the various number of communicating nodes is studied. The performance matrices throughput, end – to – end delay and packet delivery ratio are considered for simulations. Ns 2.35 simulator is used for carrying out these simulations. Results are compared for AODV, TORA, and ZRP routing protocols. The results show that AODV and TORA perform well in end – to – end delay as compared to zone routing protocol. Zone routing protocol performs well in packet delivery ratio and throughput as compared to both the other protocols.


Author(s):  
Subhasis Dash ◽  
Saras Kumar ◽  
Manas Ranjan Lenka ◽  
Amulya Ratna Swain

A wireless sensor network is a collection of batterypowered sensor nodes distributed in a geographical area. Inmany applications, such networks are left unattended for along period of time. These networks suffer from the problemslike high energy consumption, high latency time, and end- to-end low packet delivery ratio. To design a protocol that findsa trade-off between these problems is a challenging task. Inorder to mitigate energy consumption issue, different existingMedia Access Control (MAC) protocols such as S-MAC, RMAC,HEMAC, and Congestion-less Single Token MAC protocols havebeen proposed which ensure better packet delivery but fail toensure energy efficiency due to high end-to-end latency. Theproblem of high end-to-end latency is resolved with the existingrouting protocols such as Fault Tolerant Multilevel Routingprotocol (FMS)and Enhanced Tree Routing (ETR) protocol.AS2-MAC and Multi Token based MAC protocol are able toimprove the end-to-end packet delivery ratio. However, thehierarchical network structure used in these protocols increasestime and energy consumption during network reconstruction.This problem was further resolved in Distributed HierarchicalStructure Routing protocol by constructing the network structurein a distributed manner. In all these existing protocols, efficienttoken management and reliable data delivery ratio was notproperly addressed, which in turn consume more energy. So,it is clear that MAC and routing protocols both together cangive better results related to data transmission in WSN. Inorder to achieve the same, in this paper, we propose a reliabledata transmission algorithm that satisfies both routing and MACprotocol to improve the end-to-end data delivery. The proposedprotocol uses different control message exchange that ensures datapacket delivery in each individual levels and it ultimately uses oftokens to ensure reliable data transmission along with reducedtraffic congestion during end-to-end data delivery. The algorithmconsiderably improves the packet delivery ratio along with reduceenergy consumption of each sensor node. Simulation studies ofthe proposed approach have been carried out and its performancehas been compared with the Multi Token based MAC protocol,AS-MAC protocol and ETR routing protocol. The experimentalresults based on simulation confirms that the proposed approachhas a higher data packet delivery ratio.


2021 ◽  
Author(s):  
R. Thiagarajan ◽  
V. Balajivijayan ◽  
R. Krishnamoorthy ◽  
I. Mohan

Abstract Underwater Wireless Sensor Network offers broad coverage of low data rate acoustic sensor networks, scalability and energy saving routing protocols. Moreover the major problem in underwater networks is energy consumption, which arises due to lower bandwidth and propagation delays. An underwater wireless sensor network frequently employs acoustic channel communications since radio signals not worked in deep water. The transmission of data packets and energy-efficient routing are constraints for the unique characteristics of underwater. The challenging issue is an efficient routing protocol for UWSNs. Routing protocols take advantage of localization sensor nodes. Many routing protocols have been proposed for sensing nodes through a localization process. Here we proposed a Novel vector-based forwarding and efficient depth-based routing protocol. The proposed novel vector-based forwarding provides robust, scalable, and energy-efficient routing. It easily transfers nodes from source to destination. It adopts the localized and distributed alternation that allows nodes to weigh transferring packets and decreases energy consumption and provides better optimal paths. Efficient depth-based routing is a stochastic model that will succeed in a high transmission loss of the acoustic channel. The simulation was used to compare the energy consumption, network lifetime in the form of depth-based routing, delivery ratio, and vector-based forwarding to prove the optimal route finding paths and data transmission propagation delay.


2018 ◽  
Vol 7 (3.3) ◽  
pp. 295
Author(s):  
P Vijayalakshmi ◽  
Aruna Jacintha.T ◽  
V Rajendran

Major constrain in Acoustic communication network is the consumption of energy by senor nodes. The need to regulate the energy con-sumption of senor nodes relay mainly on underwater applications like disaster prevention, tsunami warning and other environmental moni-toring, where the sensor need to transmit the sensed data constantly to the control station for critical analysis. This paper mainly focuses in designing a routing protocol that can challenge a better life expectancy of underwater sensor nodes. From the broader area of research in UWSN, VBF routing protocol gives a promising performance in term of increase in data throughput, PDR and energy consumption. Hence an energy efficient vector based forwarding protocol (EEVBF) is designed which can efficiently regulates the energy consumption when compared to VBF. Based on simulation results, the performance analysis of data throughput, packet delivery ratio, and energy consumed using aquasim network simulators.  


MIND Journal ◽  
2021 ◽  
Vol 5 (2) ◽  
pp. 135-148
Author(s):  
HERIANSYAH HERIANSYAH ◽  
AHMAD REYNALDI NOPRIANSYAH ◽  
SWADEXI ISTIQPHARA

AbstrakJaringan Ad hoc pada perangkat Internet of Things (IoT) mempunyai sifat yang yang dinamis dengan node pada jaringan yang berperan sebagai router dan bergerak bebas secara random tanpa bantuan infrasturktur komunikasi sehingga topologi berubah sangat cepat seiring dengan perubahan posisi. Perubahan ini sangat mempengaruhi kualitas layanan pada perangkat IoT itu sendiri. Penelitian ini bertujuan untuk mengevaluasi protocol routing yang sudah ada dengan cara mengimplementasikan routing protocol tersebut di perangkat testbed berbasis NodeMCU ESP8266. Hal ini bertujuan untuk memilih protocol routing yang paling optimal sebelum proses implementasi dilaksanakan. Pengujian ini berlaku untuk routing protocol yang sudah ada maupun yang baru. Kinerja protocol jaringan  diukur melalui nilai  Quality of Service (QoS) ditempatkan pada scenario berbeda yang terdiri dari throughput, delay, jitter, dan packet delivery ratio sesuai dengan perbedaan beban jaringan, mobilitas, dan ukuran jaringan. Hasil penelitian ini menunjukkan bahwa testbed  yang dibangun berhasil mensimulasikan routing protocol yang ada untuk menghasilkan QoS yang baik pada perangkat IoT.Kata kunci: IoT, routing protocol, testbed, QoS.AbstractAd hoc networks on Internet of Things (IoT) devices have dynamic characteristics where the nodes on this network can operate as routers and move freely randomly without using any communication infrastructure so that the topology changes very quickly along with changes in position. This adjustment has a significant impact on the IoT device's service quality. This study aims to evaluate the existing routing protocols by implementing the routing protocol in a testbed based on NodeMCU ESP8266. It aims to choose the most optimal routing protocol before the implementation process is carried out. This test applies to both existing and new routing protocols. Network protocol performance is measured by the Quality of Service (QoS) value which includes throughput, delay, jitter, and packet delivery ratio in different scenarios based on network load, mobility, and different network sizes. The results show that this study was successful in simulating routing protocol in order to provide good QoS on IoT devices.Keywords: IoT, routing protocol, testbed, QoS.


Author(s):  
Vaishali Thorat ◽  
Dr. Lalitkumar Wadhwa ◽  
Dr. Satish Kumar

As we know Wireless Sensor Network is the perfect solution for quick capturing, processing and transmission of critical data. Sensor nodes are often deployed in generous environment but nodes suffer from low battery power. So, energy efficiency and network life are main concerns in WSN. Zig Bee have low cost, low power consumption and is beneficial in wireless sensor networks by selecting adequate communication protocol. Routing protocols like AODV (Ad- hoc on demand distance vector routing), ZTR (Zig Bee tree routing), and STR (Shortcut tree routing) and ESTR (Extended Shortcut tree routing) are compared on the idea of various performance metrics like end to finish delay, routing overload, throughput, packet delivery ratio (PDR). The mathematical analysis and performance evaluation shows that ESTR achieves better performance as compared to other routing protocols. The overall evaluation shows that ESTR achieves better performance as compared to other routing protocols. But there are some limitations of ESTR method. Performance of packet delivery ratio of STR is less as compared to AODV. Performance of end to end delay of STR is poor as compared to AODV. Extended STR is proposed to represent new ZigBee network routing protocol with improved performance of Packet Delivery ratio (PDR) and delay against STR and AODV. We are introducing here Efficient Extended Shortcut Tree Routing method (ESTR) for further improvement of delays of ESTR method.


Author(s):  
A. Radhika ◽  
D. Haritha

Wireless Sensor Networks, have witnessed significant amount of improvement in research across various areas like Routing, Security, Localization, Deployment and above all Energy Efficiency. Congestion is a problem of  importance in resource constrained Wireless Sensor Networks, especially for large networks, where the traffic loads exceed the available capacity of the resources . Sensor nodes are prone to failure and the misbehaviour of these faulty nodes creates further congestion. The resulting effect is a degradation in network performance, additional computation and increased energy consumption, which in turn decreases network lifetime. Hence, the data packet routing algorithm should consider congestion as one of the parameters, in addition to the role of the faulty nodes and not merely energy efficient protocols .Nowadays, the main central point of attraction is the concept of Swarm Intelligence based techniques integration in WSN.  Swarm Intelligence based Computational Swarm Intelligence Techniques have improvised WSN in terms of efficiency, Performance, robustness and scalability. The main objective of this research paper is to propose congestion aware , energy efficient, routing approach that utilizes Ant Colony Optimization, in which faulty nodes are isolated by means of the concept of trust further we compare the performance of various existing routing protocols like AODV, DSDV and DSR routing protocols, ACO Based Routing Protocol  with Trust Based Congestion aware ACO Based Routing in terms of End to End Delay, Packet Delivery Rate, Routing Overhead, Throughput and Energy Efficiency. Simulation based results and data analysis shows that overall TBC-ACO is 150% more efficient in terms of overall performance as compared to other existing routing protocols for Wireless Sensor Networks.


Author(s):  
Premkumar Chithaluru ◽  
Rajeev Tiwari ◽  
Kamal Kumar

Background: Energy Efficient wireless routing has been an area of research particularly to mitigate challenges surrounding performance in category of Wireless Networks. Objectives: The Opportunistic Routing (OR) technique was explored in recent times and exhibits benefits over many existing protocols and can significantly reduce energy consumption during data communication with very limited compromise on performance. Methods : Using broadcasting nature of the wireless medium, OR practices to discourse two foremost issues of variable link quality and unpredictable node agility in constrained WSNs. OR has a potential to reduce delay in order to increase the consistency of data delivery in network. Results : Various OR based routing protocols have shown varying performances. In this paper, a detailed conceptual and experimental analysis is carried out on different protocols that uses OR technique for providing more clear and definitive view on performance parameters like Message Success Rate, Packet Delivery Ratio and Energy Consumption.


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