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A Mobile Ad hoc Network (MANETs) is a group of wireless mobile terminals, which cooperate together by routing packets to each other on a temporary network. MANETs are attracting attention for their potential use in several fields such as collaborative computing and communications in indoor and outdoor environments. Considering mobility of the terminals, routing is a key process for operation of MANETs. In this paper, we analyze the performance of Optimized Link State Routing (OLSR) protocol in a mixed indoor and outdoor environment considering different scenarios (STA1, STA2, MOV) for horizontal topology. We evaluate the scenarios based on throughput and delay metrics. From the experimental results, we found that for STA1 scenario, there is a decrease in performance in the case of 1→4 flow, for both metrics, because of the hop distance. For STA2 scenario, the presence of node 5 improves route quality for 1→4 flow. When destination node is moving (MOV scenario), the delay and throughput decreased because it becomes difficult to keep the route to the destination.