Maximum Lifetime Combined Barrier Barrier-Coverage Coverage of Weak Static Sensors and Strong Mobile Sensors
Abstract: Recently, the concept of barrier-coverage barrier coverage of wireless sensor network has been introduced for various civilian and military defense applications. This paper studies the problem of how to organize hybrid sensor network, which consists of a number of energy-scarce scarce ground sensors with homogenous initial battery level and energy-plentiful plentiful mobile sensors, to maximum the lifetime of barrier barriercoverage. Two key observations bservations are (a) as the lifetime of each mobile sensor is much longer than that of the static ground sensors, each mobile sensor is capable of contributing multiple sensor barrier formations, and (b) no mobile sensor node can join two hybrid barriers wh which ich will be successively used to continuously protect the area of interest due to the moving delay. Based on these, we introduce a new maximum lifetime barrier barrier-coverage coverage problem in hybrid sensor network. We first propose a simple heuristic algorithm by comb combining existing ideas along with our own. Then, we design another efficient algorithm for the problem and prove that the lifetime of hybrid barrier constructed by this algorithm is at least three times greater than the existing one on average. Our simulation n result shows that the second algorithm outperforms the first algorithm at least 33 percent and up to 100 percent.