WLAN and Ad hoc networks are widely applied in different fields, but the limited frequency bandwidth will induce the inter-system and intra-system interference , and reduce the performance of network.

In order to develop the parallelisms of inter transaction and intra transaction, multithread technique is used, thus system performance is improved.

Supply chain management is a cross-functional intra-enterprise system that uses information technology to help support and manage producing its products or services.