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In this paper, the authors investigate the benefits of Optimized Link State Routing Protocol used for communication in underground mines. Due to network failures, node and link failures in the past few years an explosive growth in the use of wireless routing protocols for communication needs in the underground environment. Most studies indicate that it is impossible for reliable routing under ground level. In this paper, they compare the analysis of the OLSR (Optimized Link State Routing) Protocol and OSPF (Open Shortest Path First) protocol. The performance results shows that OLSR protocol work efficiently since the protocol runs in wireless multi-hop scenarios the message flooding in OLSR is optimized to preserve bandwidth.
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