A Rule Processing Scheme Using the Rete Algorithm in Grid Topology Networks Recently, sensor devices such as temperature sensors or cameras are used for various purposes. These devices sometimes construct ad hoc networks, and a grid topology is one of their typical network topologies. Describing processing by rules is suitable for them since the system can flexibly change their processing according to their purposes. By relieving their rule processing loads and communication delay, the system can be applied for many applications. However, there is no rule processing schemes to realize those. In this paper, we propose a rule processing scheme using the Rete algorithm. Our proposed scheme can realize rule processing reducing redundant loads and delay for many applications.