tailieunhanh - GeoSensor Networks - Chapter 13

Phân bổ kênh năng lượng hiệu quả trong Xuất bản / Theo dõi Networks GeoSensor Saravanan Balasubramanian và Demet Aksoy Bộ máy tính ứng dụng trong các mạng cảm biến bao gồm các phương pháp tiên tiến cho địa lý, không khí, và giám sát nước. Khi số lượng cảm biến được triển khai ngày càng tăng cũng như sức mạnh tính toán của các cảm biến này, có một nhu cầu đang nổi lên để trao đổi một lượng khối lượng của dữ liệu để phân tích các quan sát. Chúng tôi nghiên cứu cơ chế giao tiếp hiệu quả. | Energy Efficient Channel Allocation in Publish Subscribe GeoSensor Networks Saravanan Balasubramanian and Demet Aksoy Department of Computer Science University of California Davis balasubr aksoy @ ABSTRACT Recent applications in sensor networks contain advanced methods for geo air and water monitoring. As the number of sensors being deployed is increasing as well as the computation power of these sensors there is an emerging need to exchange mass amounts of data to analyze observations made. We study efficient and interference-aware communication mechanisms between geosensors. In this paper we present an online broadcast scheduling algorithm for a publish subscribe sensor network. Using a simple subscription protocol sensors publish their topic information to its neighbors who can then subscribe to interested topics. Our online scheduling protocol creates a schedule without any initial global knowledge attempts to reduce the number of channels in the schedule and the amount of transmissions made by a sensor. Analysis of our simulation results show that our online algorithm is competitive to the centralized vertex-coloring algorithm while decreasing total energy consumption by the sensors. 1. INTRODUCTION Recent advances in wireless technology and the development of small lowcost low-energy electronics has led to increased research in the area of wireless sensor networks. A wireless sensor network is a highly distributed system consisting of small wireless low-energy unattended sensors. There are various defense scientific and engineering applications that use wireless sensor networks -- military reconnaissance and surveillance environmental and habitat monitoring and wildlife tracking. A sensor s basic functionality is to acquire data from the physical environment process the data and communicate the information to other sensors or users. The functionalities of a sensor have many similarities to the publish subscribe paradigm that uses push technology