In order to improve performance of sweep coverage, a novel sweep coverage approach with two-tier architecture named MASC (Mobile-Assisted Sweep Coverage) was proposed by using mobile assisted carriers to help data delivery. In the first tier of MASC, mobile sensor nodes were attached to POIs for information gathering. Mobile-assisted carriers were introduced in the second tier to transfer data from mobile sensor nodes to sink node. Simulation results showed that MASC achieves better performance than existing approaches.
