부산대학교 도서관

In this paper we present an improved Gossiping data distribution technique with emphasis on the location of nodes called "LGossiping" that reliably disseminate information among sensors in a wireless sensor network. Nodes running LGossiping data distribution technique use global positioning system to relay data throughout the network. Each node decides upon position knowledge of the others. This allows each sensor to send its data reliably to one of known neighbors instead of sending data blindly to one of neighbors which may not be near to source node and cause data lost. We outlined SystemC as simulation language and simulate and analyzed Gossiping and LGossiping protocols. In each experiment source node propagate data among nodes with the hope of reaching to sink node. This procedure is called data transmission. We found that LGossiping with transmission radius greater than or equal to 4 (TR≫=4) is 30% more reliable than Gossiping for a specific number of experiments. LGossiping is an improvement of Gossiping in terms of reliability. Therefore reliability in this improved method is critical. Moreover, network energy consumption with respect to different TR is considered. We concluded that network energy consumption decreases as the transmission radius increases. As termination, increasing area during the experiment is mentioned. In order to have constant reliability with constant number of nodes in LGossiping method in immense areas, with each 600m2 increase of area transmission radius should increases 1 meter.