Minimum-energy broadcasting in wireless networks in the d-dimensional Euclidean space (the alpha

We consider the problem of minimizing the total energy assigned to nodes of wireless network so that broadcasting from the source node to all other nodes is possible. This problem has been extensively studied especially under the assumption that the nodes correspond to points in the Euclidean two- or three-dimensional space and the broadcast range of a node is proportional to at most the α root of the energy assigned to the node where α is not less than the dimension d of the space. In this paper, we study the case α≤d, providing several tight upper and lower bounds on approximation factors of known heuristics for minimum energy broadcasting in the d-dimensional Euclidean space