In the traffic offered by the on chip components, providing guaranteeing throughput or quality of service is the one of the most difficult tasks in network on chip design. For integrating numerous components on chip, NOC is adopted. It enables large number of computational and storage block to integrate on a single chip. Topology in NOC play important role to provide QoS. In this paper, the authors calculate the minimum period and frequency when 8 bit data is sent from source to destination and compare the performance between backtracking and retracting in NOC.