This paper proposes an efficient information exchange method using metadata to be used in ad-hoc networks where no fixed centric servers exit and sessions among nodes cannot be guaranteed due to the moving of each node, that is essential characteristics ad-hoc networks employ. Several simulation results show that the size of the metadata is an important factor to get the information exchange efficiency. Because the size of metadata corresponds to the granularities of target information to be exchanged, generally, more metadata is exchanged, higher success rate of information exchange is achieved, however, this is not the case of ad-hoc networks due to the node mobility. Therefore, a layered-metadata transmission method is proposed in this paper. According to the simulation results, the proposed method gives much higher success rate of information exchange.
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