Thongthavorn, Thananop
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Thongthavorn, Thananop
Main Affiliation
Email
thananop.th@kmitl.ac.th
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Item type:Publication, Global-Scale Flow Routing for Load-Balancing in In-Band Software-Defined MANET(2025-01-01); Mobile Ad Hoc Networks (MANETs) typically operate with limited resources; therefore, achieving better load distribution among mobile nodes can significantly enhance network performance by improving resource utilization. In distributed load-balancing protocols, a lack of global network topology information causes source nodes to make load-balancing routing decisions without awareness of other active paths. As a result, overlapping paths from different source nodes tend to be formed, increasing network congestion and packet collision probability, which ultimately degrades network performance. A Software-Defined MANET (SD-MANET) is a promising solution to this problem since the controller can make a routing decision for source nodes based on up-to-date network topology snapshots. In this paper, we propose a global-scale flow routing algorithm based on an in-band SD-MANET architecture. Once the controller aggregates local network data into a global topology view, it can identify a path that avoids using any nodes currently serving as a relay in other active paths. The controller then establishes or switches the active flow to the new route depending on the current network situation. Simulation results show that our proposed work can effectively reduce the number of overlapping paths, resulting in lower load balancing errors and a higher packet delivery ratio. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Low overhead localized routing in mobile Ad Hoc networks(2019-01-01); ; Phankaew, ChanakanMobile 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.