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Author: search.filters.author.Narongkhachavana, Worrawat

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    Low overhead localized routing in mobile Ad Hoc networks
    (2019-01-01)
    Prabhavat, Sumet
    ;
    Narongkhachavana, Worrawat
    ;
    Thongthavorn, Thananop
    ;
    Phankaew, Chanakan
    Mobile Opportunistic Networks (OppNets) are infrastructure-less networks consisting of wireless mobile nodes and have been a focus of research for years. OppNets can be scaled up to support rapid growth of wireless devices and technologies, especially smartphones and tablets. Mobile Ad Hoc Networks (MANETs), one of OppNets technologies, have a high potential to be used for facilitating an extension for the Internet and a backup communication platform in disaster situation. However, a connection disruption due to node mobility and unreliable wireless links is possible to trigger a flooding operation of route repair process. This results in transmission delay and packet loss. The flooding of routing packets is an expensive operation cost in MANETs which affects network reliability and wastes limited resources such as network bandwidth and node energy. These are obstacles to practical implementation of MANETs in real-world environment. In this paper, we propose Low Overhead Localized Flooding (LOLF), an efficient overhead reduction routing extension based on Query Localization (QL) routing protocol. The purpose of this work is to control the propagation of routing packets in the route discovery and route repair mechanisms while incurring only a small increase in the size of control information in the packet. Simulation results from extensive experiments show that our proposed method can reduce overall routing overhead, energy consumption, and end-to-end delay without sacrificing the packet delivery ratio compared to existing protocols.
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    Adaptive gateway discovery for load distribution in hybrid wireless networks
    (2018-07-02)
    Thongthavorn, Thananop
    ;
    Narongkhachavana, Worrawat
    ;
    Namuduri, Kamesh
    ;
    Prabhavat, Sumet
    Mobile Ad hoc Networks (MANETs) have a limitation in information transmission capability since nodes in the network cannot communicate with any nodes in another network. Hybrid Wireless Networks (HWNs) is proposed for connecting MANETs to another network through gateway nodes that act as a bridge between the networks. Limited energy resource to HWNs is a challenging issue. If a source node selects a gateway and a route to it without considering the available energy of relay nodes, the probability of route breakage may increase leading to network instability and network partition problem. In order to mitigate these problems, an effective load balancing algorithm should be applied to HWNs. In this paper, we propose an adaptive gateway discovery algorithm aimed to create a well-balanced network. We also propose using a directional flooding technique to alleviate the drawback of load balancing information flood. Simulation results show that our protocol distributes the workload to mobile nodes more evenly. As a result, our protocol further extends the network lifetime without sacrificing the network performance when compared to the existing protocols.
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    Overhead reduction for route repair in mobile ad hoc networks
    (2018-01-01)
    Narongkhachavana, Worrawat
    ;
    Prabhavat, Sumet
    In Mobile Ad Hoc Networks (MANETs), routing overhead is a major problem since a bandwidth and an energy of mobile node are limited. Due to node’s mobility and an unreliable wireless link, a path connecting between a source and a destination will break frequently. This causes a network-wide flooding of routing packets being invoked repeatedly, leading to high packet loss and network congestion, especially in a high mobility network. In this paper, we propose an efficient route repair method based on Query Localization technique. The routing packets, which propagate back to a source, are discarded to alleviate unnecessary rebroadcasting. Simulation results show that our proposed method can reduce routing overhead and MAC collision rate without sacrificing packet delivery ratio compared to existing protocols.
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    A dynamic routing for load distribution in mobile Ad-Hoc network
    (2018-01-01)
    Rungtaveesak, Metha
    ;
    Chartkajekaew, Noppawit
    ;
    Thongthavorn, Thananop
    ;
    Narongkhachavana, Worrawat
    ;
    Prabhavat, Sumet
    Mobile Ad Hoc Network is a group of mobile nodes which can communicate with each other directly without infrastructure device. Most conventional protocols do not consider energy on route discovery. Route breaks may occur frequently since the energy of some intermediate nodes exhausts. This interrupts the packet forwarding. In this paper, we propose load distribution algorithm based on remaining energy of nodes to prolong network lifetime and load balancing. Simulation results show that our work can increase the number of remaining nodes in the network while maintaining high packet delivery ratio.
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    Overhead reduction of location-Aided gateway discovery protocols
    (2017-02-23)
    Thongthavorn, Thananop
    ;
    Narongkhachavana, Worrawat
    ;
    Prabhavat, Sumet
    Integration of mobile ad-hoc networks (MANETs) into infrastructure-based networks allows mobile users to access other networks. At a network boundary, some node with multiple interfaces plays an important role as a gateway. Gateway discovery mechanism is necessary for mobile nodes to discover nearby gateways but causes message exchange overhead. In order to control the overhead, we present a novel location-Aided gateway discovery protocol with directional broadcast algorithm and Solicitation technique. Simulation results show that our proposed protocol can reduce the overhead, as compared to conventional protocols. Moreover, it improves packet delivery ratio, end-To-end delay, and gateway discovery time.
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    An efficient spreading Epidemic Routing for Delay-Tolerant Network
    (2016-03-30)
    Choksatid, Teerapong
    ;
    Narongkhachavana, Worrawat
    ;
    Prabhavat, Sumet
    Delay-Tolerant Network (DTN) is a network technology which can provide communication in an environment where an end-to-end path may not be possible. Over the past years, Epidemic Routing has been recognized as the DTN protocol that can deliver messages quickly by spreading messages from node to node all over the network. However, many pieces of research argue against using Epidemic Routing due to the large number of message exchanges. In this paper, we propose Speed Epidemic Routing (SEd), which is the renovation of Epidemic Routing scheme. By applying broadcast transmission, we can increase the speed of messages spreading and reduce forwarding redundant messages. The simulation results show that SEd is a protocol providing high delivery rate and low packet rate at the same time.
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    A study on overhead reduction for GPS-assisted mobile ad-hoc networks
    (2015-01-01)
    Thongthavorn, Thananop
    ;
    Narongkhachavana, Worrawat
    ;
    Prabhavat, Sumet
    Nowadays mobile ad-hoc network (MANET) is focused by many researchers and striving to be deployed in practice. To achieve this goal, these two factors is major problem that we have to consider. The first one is overhead. In the other word, messages that are not necessary to be sent when establish network connection between mobile nodes. The next problem is packet sending rate from source to destination node that high enough to guarantee successful network connection. This paper is focusing on improved the performance of Location-Aided Routing Protocol (LAR) in term of overhead reduction by modifying the algorithm of MANET route discovery process. The result of simulation show that proposed protocol can reduce overhead drastically, expanding network lifetime and increase packet sending rate while comparing with other conventional protocol.
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    An efficient message flooding scheme in delay-tolerant networks
    (2015-01-01)
    Narongkhachavana, Worrawat
    ;
    Choksatid, Teerapong
    ;
    Prabhavat, Sumet
    In intermittently connected ad hoc networks, a reliable path between communication endpoints may not exist because mobile nodes randomly move during their operation. Furthermore, routing protocols have to work efficiently under constraints of limited bandwidth and energy. These challenge researchers to develop a suitable protocol for the networks. In this paper, we present a new routing protocol, which limits the number of message replications. In addition, a node should spread messages with lower probability if the messages are currently distributed in its local neighborhood. This increases an opportunity for a node to spread messages to other network areas. Simulation results show that our work can increase delivery ratio while maintaining low end-to-end delay and message exchange overhead.