The connected sensor cover was first studied by Cardei et al. The minimum connected sensor cover problem (Problem 1.3.2) was first proposed by Gupta, Das, and Gu. They presented a greedy algorithm with performance ratio O(rln n) where n is the number of sensors and r is the link radius of the sensor network, i.e., for any two sensors s and s′ with a sensing point in common, there exists a path between s and s′ with hop distance at most r in communication network. Zhang and Hou studied the minimum connected sensor cover problem in homogeneous wireless sensor networks with property that Rc ≥ 2Rs. They showed that in this case, the coverage of a connected target area implies the connectivity. This result was generalized by Zhou, Das, and Gupta to the m-connectivity that if every point in a connected target area is covered by at least m sensors, then those sensors induce an m-connected sensor network. Xing et al. presented a coverage configuration protocol which can give different degree of coverage requested by applications. Bai et al. studied a sensor deployment problem regarding the coverage and connectivity. Alam and Haas studied this problem in three-dimensional sensor networks.