In such a network, each mobile node is attached to a mobile object. The movement and the current position of the object are monitored in real time. This system enables users to find and count mobile objects quickly, and it can be applied selleckbio to mobile asset tracking [10,11], human monitoring [12], and medical equipment monitoring [13].The mobile asset tracking system monitors movements and locations of mobile assets within a monitoring area by attaching a mobile node to a mobile asset. The position of the mobile node is considered as that of the mobile asset. The mobile asset can move around within the monitoring area, stay in another place after leaving that area, and then return to the original area.
The continuous movement of the mobile asset changes the configurations of WSNs by changing its parent node, causes the asset to disconnect from the network, and makes the system generate incorrect results. One Inhibitors,Modulators,Libraries of these changes of WSNs is a possible error in the in/out status of the mobile asset. The Inhibitors,Modulators,Libraries system might determine that the position of the mobile asset is outside the area even when the asset is within the area, or vice versa. The incorrect Inhibitors,Modulators,Libraries in/out status of the mobile asset is caused by node failure. However, the above works that use mobile sensor networks do not describe the effect of node failure while the applications are working; rather, they assume that all nodes are reliable. For example, the mobile asset tracking system described in [10] is used to monitor mobile medical equipment in the emergency room of Incheon Gil Medical Center in Korea.
The emergency room has a lot of medical equipment necessary to provide medical treatment to patients with various illnesses and injuries according to the patient��s condition. In real time, the system monitors several mobile medical assets with mobile nodes and reports their positions to nurses. The system allows Inhibitors,Modulators,Libraries the nurses to rapidly generate a report that details how many assets are in the emergency room and how many assets have left the area, as well as where the mobile assets are. However, a few nurses have reported that the number of inside and outside assets determined by the system were different in real situations while the system was working.There has been some research on controlling false status, as will be discussed in Section 2.
These projects have tried to detect node failures using observer nodes that monitor whether target nodes perform their functions or not. The methods are suitable for static nodes because the relationship between Drug_discovery observer nodes and target nodes is constant and they exchange monitoring messages periodically. However, such a method cannot be applied to mobile nodes because the relationship between the observer and the target nodes changes continuously when screening libraries mobile nodes move.