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Using Cellular Automata for grid-based Fishery Management

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Agricultural Sciences 2019年第3期10卷 249-258页

作者： Sing-Chou Fong Professor College of Marine Sciences National Sun Yat-sen University Kaohsiung Taiwan

This report introduced new concept and technics for a grid-based fishery management system. The fishing ground was first divided into small grid of equal area, each with predefined longitudes and latitudes (both 0.033 degrees or approximately 2 × 2 nautical miles in this study). All grids were laid and formatted into a Microsoft-Excel spreadsheet system, as defined by the coastline. Individual sheets were also constructed to represent different ecological characters, serving as supporting data of the main grid-map. Including individual fishing record, water depth, wind & current vector, benthic character, etc. Cellular automata (CA) mathematics was applied for simulation studies. They were programmed on the built-in Visual BASIC langrage in EXCEL. In a three-year research project, the author was able to accomplish the following major results: 1) An EXCEL-based spreadsheet system for storage of fishing effort in each grid. Provided that data of fishing yield is also available for each grid, research model for fishery management can be constructed, leading toward solutions for total allowable catch (TAC) as well as maximum economic yield (MEY). 2) A multi-layered, 2-dimentional spread-sheet system demonstrating the distribution of relative intensity for individual grids. The system can be decked up with different ecological data for more advanced studies. 3) Estimation of the nearest distance between two special grids as well as fishing harbors. This would help in more efficient navigation management and allocation of fishing rights for the fishing vessels.

关键词： grid-based Fishery Cellular Automata Spatial Model Fishery Management

Multipath grid-based Enabled Geographic Routing for Wireless Sensor Networks

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Wireless Sensor Network 2014年第12期6卷 265-280页

作者： Bassel Arafeh Khaled Day Abderezak Touzene Nasser Alzeidi Department of Computer Science Sultan Qaboos University Al Khoudh Oman

This work proposes an efficient disjoint multipath geographic routing algorithm for dense wireless sensor networks (WSN), called Multipath grid-based Enabled Geographic Routing (MGEGR). The proposed algorithm relies on the construction of a 2-D logical grid in the geographical region of deployment. The objective of the proposed scheme is to determine optimal or near-optimal (within a defined constant) multiple disjoint paths (multipath) from a source node to the sink, in order to enhance the reliability of the network. The determined multiple disjoint paths would be used by the source node in a round-robin way to balance the traffic across the disjoint paths, and to avoid discovered paths with cell holes. The proposed scheme limits the use of broadcasting to the process of gateway election within each cell, and the process of maintaining the table of neighbors of each gateway. Our simulation results show the effectiveness and scalability of our routing scheme with increased network size compared to on-demand routing protocols.

关键词： Wireless Sensor Networks Mobile Ad Hoc Networks Clustering Algorithms Disjoint Multipath Routing grid-based Routing Geographic Routing

A Void Avoidance Scheme for grid-based Multipath Routing in Underwater Wireless Sensor Networks

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Wireless Sensor Network 2018年第7期10卷 131-156页

作者： Thoraya Al- Subhi Bassel Arafeh Nasser Alzeidi Khalid Day Abderezak Touzene Department of Computer Science Sultan Qaboos University Muscat Oman Computer Engineering and Computer Science Department University of Louisville Louisville KY USA

This work proposes a geographic routing protocol for UWSNs based on the construction of a 3D virtual grid structure, called Void-Avoidance grid-based Multipath Position-based Routing (VA-GMPR). It consists of two main components, the multipath routing scheme and the grid-based void avoidance (GVA) mechanism for handling routing holes. The multipath routing scheme adopts node-disjoint routes from the source to the sink in order to enhance network reliability and load balancing. While the GVA mechanism handles the problem of holes in 3D virtual grid structure based on three techniques: Hole bypass, path diversion, and path backtracking. The performance evaluation of the VA-GMPR protocol was compared to a recently proposed grid-based routing protocol for UWSNs, called Energy-efficient Multipath Geographic grid-based Routing (EMGGR). The results showed that the VA-GMPR protocol outperformed the EMGGR protocol in terms of packet delivery ratio, and end-to end-delay. However, the results also showed that the VA-GMPR protocol exhibited higher energy consumption compared to EMGGR.

关键词： Geographic Routing 3D Virtual grid Structure grid-based Routing Underwater Wireless Sensor Networks (UWSNs) Hole Problem

Mixed Communication Method on the grid-based for Wireless Sensor Networks

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International Journal of Technology Management 2014年第8期 134-137页

作者： YAN Zhu Xine You Ran Yan Department of Electronic and Information Engineering Loudi Vocational & Technical College Loudi Hunan China

When senors transmit their data to the sink via multi-hop communication, the sensors closer to the sink are burdened with heavy relay traffic and tend to die early. On the contrary, if all sensors transmit datas to the sink via single-hop communication, the sensors further from the sink will die much more quickly than those closer to the sink. In this paper, we first develop an analytical model to derive the optimal cluster radius. Then we propose a mixed communication method on grid-based where the sensors can transmit data to the sink in either single-hop or multi-hop. Finally, we conduct extensive experiments and show that our method outperforms LEACH and HEED in terms of network lifetime by balancing energy consumption.

关键词： wireless sensor network grid-based energy consumption balance network lifetime

A Path-based Approach for Data Aggregation in grid-based Wireless Sensor Networks

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Journal of Electronic Science and Technology 2014年第3期12卷 313-317页

作者： Neng-Chung Wang Yung-Kuei Chiang Chih-Hung Hsieh Department of Computer Science and Information Engineering National United University

Sensor nodes in a wireless sensor network （WSN） are typically powered by batteries, thus the energy is constrained. It is our design goal to efficiently utilize the energy of each sensor node to extend its lifetime, so as to prolong the lifetime of the whole WSN. In this paper, we propose a path-based data aggregation scheme （PBDAS） for grid-based wireless sensor networks. In order to extend the lifetime of a WSN, we construct a grid infrastructure by partitioning the whole sensor field into a grid of cells. Each cell has a head responsible for aggregating its own data with the data sensed by the others in the same cell and then transmitting out. In order to efficiently and rapidly transmit the data to the base station （BS）, we link each cell head to form a chain. Each cell head on the chain takes turn becoming the chain leader responsible for transmitting data to the BS. Aggregated data moves from head to head along the chain, and finally the chain leader transmits to the BS. In PBDAS, only the cell heads need to transmit data toward the BS. Therefore, the data transmissions to the BS substantially decrease. Besides, the cell heads and chain leader are designated in turn according to the energy level so that the energy depletion of nodes is evenly distributed. Simulation results show that the proposed PBDAS extends the lifetime of sensor nodes, so as to make the lifetime of the whole network longer.

关键词： Base station cell head data aggregation grid-based wireless sensor networks

Performance Analysis of grid based AODV Routing Algorithm for AD Hoc Wireless Networks

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International Journal of Communications, Network and System Sciences 2015年第13期8卷 523-532页

作者： Abderezak Touzene Ishaq Al-Yahyai Computer Science Department Sultan Qaboos University Muscat Oman

In many traditional On Demand routing algorithms in Ad hoc wireless networks, a simple flooding mechanism is used to broadcast route request (RREQ) packets when there is a need to establish a route from a source node to a destination node. The broadcast of RREQ may lead to high channel contention, high packet collisions, and thus high delay to establish the routes, especially with high density networks. Ad hoc on Demand Distance Vector Routing Protocol (AODV) is one among the most effective Reactive Routing Protocols in MANETs which use simple flooding mechanism to broadcast the RREQ. It is also used in Wireless Sensor Networks (WSN) and in Vehicular Ad hoc Networks (VANET). This paper proposes a new modified AODV routing protocol EGBB-AODV where the RREQ mechanism is using a grid based broadcast (EGBB) which reduces considerably the number of rebroadcast of RREQ packets, and hence improves the performance of the routing protocol. We developed a simulation model based on NS2 simulator to measure the performance of EGBB-AODV and compare the results to the original AODV and a position-aware improved counter-based algorithm (PCB-AODV). The simulation experiments that EGBB-AODV outperforms AODV and PCB-AODV in terms of end-to-end delay, delivery ratio and power consumption, under different traffic load, and network density conditions.

关键词： Mobile Ad-Hoc Networks AODV Routing Algorithm Position-based Routing grid-based Routing NS2

Time-optimal Path Planning to Solve Motion Direction Restrict with Lower Computational Cost

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Time-optimal Path Planning to Solve Motion Direction Restric...