Abstract: An Context aware optimized link state routing protocol for networks with fast moving nodes was proposed CAOLSR (Context-aware Optimized Link State Routing Protocol) adopts a context aware mechanism,and selects MPR (Multi Point Relays) based on relative movement of nodes, recent access-time and connection number of nodes, and adopts a special flow of MPR selection. In addition, by the introduction of Fisheye, reduces the influence from mobility on the routing accuracy. Experimental results show that CAOLSR can achieve good performance and outperform HOLSR (Hierarchical Optimized Link State Routing Protocol)，OLSR (Optimized Link State Routing Protocol) and DSDV (Destination Sequenced Distance Vector) in networks with fast moving nodes.

Key words: Fast movement, MANET, Routing, Context-aware,MPR