DISCRETE EVENT SIMULATION SYSTEM AND METHOD
Lookback is defined as the ability of a logical process to change its past locally (i.e. without involving other logical processes). Logical processes with lookback are able to process out-of-timestamp order events, enabling new synchronization protocols for the parallel discrete event simulation. This technology is directed to two of such protocols, LookBack-Global Virtual Time (LB-GVT) and LookBack-Earliest Input Time (LB-EIT), which are presented and their performances on the Closed Queuing Network (CQN) simulation are compared with each other.