دانلود رایگان مقاله استقرار پویای گره های سنسور تلفن همراه به طور تصادفی در حضور موانع

Abstract

For random deployment of wireless sensor networks in a specified geographical location and in the presence of obstacles, optimal network coverage is highly desirable while maintaining network connectivity. In this piece of work, we propose an efficient autonomous deployment scheme, named as Obstacle Avoidance Virtual Force Algorithm (OAVFA), for self-deployment of randomly scattered homogeneous as wells as heterogeneous mobile sensor nodes over a squared sensing field to enhance the network coverage and ensure the network connectivity in the presence of obstacles. Our proposed approach is localized in the sense that each decision taken by the sensor node is strictly based on information acquired from its neighbors. The simulation results show that OAVFA provides an efficient self-deployment of mobile sensor nodes in the presence of obstacles.

6. Conclusion

In this paper, we propose a localized self- deployment scheme called OAVFA for homogeneous as well as hetero-geneous mobile sensor networks with random initial dis-tribution. This algorithm works well in the scenarios of the random initial distribution of mobile sensor nodes to max imize the area coverage and minimize the moving energy 429 requirement in the presence of obstacles while maintain- 430 ing connectivity. To prevent the sensor nodes from mov- 431 ing out of sensing field boundary, we consider a repulsive 432 force exerted by sensing field boundary. We also add re- 433 pulsive force exerted by obstacles to avoid the presence of 434 obstacles in ROI. Simulation results demonstrate that the 435 proposed approach provides better performance than IVFA 436 and EVFA for deployment of homogeneous as well as het- 437 erogeneous sensor nodes in a squared sensing field with 438 and without the obstacles.