The communication performance of optical burst switching(OBS) networks is limited because the interaction between the assembly algorithm of edge nodes and the data scheduling algorithm of core nodes isn't considered in traditional OBS network assembly algorithm. After analyzing the influence of the assembly algorithm of edge nodes on the data scheduling of core nodes, we proposed a novel assembly algorithm of edge nodes, i.e. congestion-control-based assembly algorithm (CCAA) in OBS networks. The algorithm improves the success probability of core-node-data scheduling and enhances the performance of OBS networks by analyzing the influence of the assembling parameter of edge nodes on data scheduling and adjusting the assembling algorithm to affect the success rate of core node scheduling.