Abstract
Recently, there has been increasing interest in Mobile Wireless Sensor Networks (MWSNs) that are constructed by mobile sensor nodes held by ordinary people, and it has led to a new concept called urban sensing. In such MWSNs, mobile sensor nodes densely exist, and thus, there are basically many sensor nodes that can sense a geographical point in the entire sensing area. To reduce the communication cost for gathering sensor data, it is desirable to gather the sensor data from the minimum number of mobile sensor nodes which are necessary to guarantee the sensing coverage or the quality of services. In this paper, to achieve this, we propose a data gathering method using mobile agents in dense MWSNs. The proposed method guarantees the sensing coverage of the entire area using mobile agents that autonomously perform sensing operations, transmit sensor data, and move between sensor nodes. By gathering only sensor data generated by sensor nodes where mobile agents are running, our proposed method can achieve efficient gathering of sensor data.
Highlights
There has been a great deal of interest in Wireless Sensor Networks (WSNs [12,17,22]) because advances in semiconductor and wireless communication technologies have led to the development of small and inexpensive sensor devices
Mobile Wireless Sensor Networks (MWSNs) constructed by mobile sensor nodes (e.g., PDA and smart phones with sensor devices held by ordinary people) have attracted much attention for urban sensing because they do not require any infrastructures [3,13,14,16]
We assume dense MWSNs constructed by mobile sensor nodes which are held by ordinary people and equipped with a radio communication facility
Summary
There has been a great deal of interest in Wireless Sensor Networks (WSNs [12,17,22]) because advances in semiconductor and wireless communication technologies have led to the development of small and inexpensive sensor devices. Goto et al / Data gathering using mobile agents for reducing traffic in dense mobile wireless sensor networks limited network resources in the Internet, it is desirable to minimize traffic that MWSNs injects into the Internet For this aim, MWSNs constructed by mobile sensor nodes (e.g., PDA and smart phones with sensor devices held by ordinary people) have attracted much attention for urban sensing because they do not require any infrastructures [3,13,14,16]. Mobile agents are generated by the sink and allocated on sensor nodes located near the sensing points, which are determined from the requirement on geographical granularity of sensing. Mobile agents, which are allocated by the sink on sensor nodes located near the sensing points, guarantee the requirement of geographical granularity of sensing by controlling transmissions of sensor data.
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