Abstract: The Wireless Sensor Network（WSN or WSNs） is a new type of data monitoring network. One important characteristic of the WSNs is it is highly energy-constraint and powered by batteries. The most important design elements is the energy-efficiency. The GHT-DC

Key words: Wireless sensor networks, GPSR, Grid-based GHT（GGHT）, Index GGHT, Data dissemination, Energyefficient