Although wireless sensor network was a trend of past few years, lots of researchers have been working for its development. As a consequence, they have developed new research works. But within these works, very few works are for disaster managements in hybrid networks of sensor networks and cellular networks. However, among these few works, no works consider that some base stations of cellular networks might be collapsed or unreachable during or after disaster. From experience we can say, in 1995 during earthquake in Kobe Japan, base stations were unreachable from disaster areas. Same things happened during Nigatta earthquake in 1999. Considering these deficiencies, in this paper we propose an updated framework for data collection from sensor networks and a protocol for wireless sensor network for disaster management; this protocol is abbreviated as WSNDM. Our data collection framework is an updated framework of [8]. Here we consider some base stations might be unreachable due to disaster. For data dissemination from sensor networks, we have used ARS(Adhoc Relay Station)s. In [8], based on ARSs placement in border areas of cells, cells are divided in to three types. In our performance section, we evaluate the performance of proposed protocol WSNDM with respect to these three types of cell, it also, we compare our protocol with LEACH, a popular hierarchical protocol, where our protocol outperforms the LEACH protocol.
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