TAILIEUCHUNG - Sustainable Wireless Sensor Networks Part 5

Tham khảo tài liệu 'sustainable wireless sensor networks part 5', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | On Clustering in Sensor Networks 131 the cluster heads and its neighbors to the median of the distances. All the nodes are equiped with a GPS. In the same context in Gupta Younis 2003a the same authors address the issue of the cluster head failure. The network uses a TDMA like transmission mechanism for which some slots are dedicated to the cluster heads to communicate their status. When all the cluster heads have no more information about one of them they distribute its sensors between them. For this purpose any cluster head has two lists a list of sensors of its own cluster and another list of other sensors for which it is the backup cluster head. The first list is obtained according to the method proposed in Gupta Younis 2003b the second one is obtained with a simple visibility condition between the cluster head and a sensor. In Klaoudatou et al. 2008 Klaoudatou et al. consider medical surveillance sensor networks of which the nodes are mobiles. They select the closest node to the base station in ad-hoc environment during the emergencies on the spot or using access points in the hospital as a cluster head. Actually they notice that the mobility allows then to turn this role of cluster head between the different sensors. Chinara Rath 2008 considers also the case of mobile sensors. They estimate then their speed during the last time period and the least mobile ones are chosen as cluster heads. Liu Lee and Wang in Liu et al. 2007 propose two algorithms. The first on ACE-C Algorithm of Cluster head Election by counting aims at determining the cluster head on the basis of the node identifier there are N nodes in the network C cluster heads are required in the network a node x is then a cluster head all the N C periods. At the beginning of a new period a cluster head broadcasts a message to all the nodes advertizing it becomes cluster head and containing its geographical position and its speed vector and the others choose the nearest cluster head. For this purpose .

TỪ KHÓA LIÊN QUAN
Đã phát hiện trình chặn quảng cáo AdBlock
Trang web này phụ thuộc vào doanh thu từ số lần hiển thị quảng cáo để tồn tại. Vui lòng tắt trình chặn quảng cáo của bạn hoặc tạm dừng tính năng chặn quảng cáo cho trang web này.