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Direct Interconnection networks have been employed in network on chip (NoC). Provision of quality of service(QoS) in direct Interconnection networks is a challenging problem and receives much attention recently. Traditional switching mechanisms such as, store and forward, wormhole switching, and virtual cut-through switching cannot meet QoS demands for real-time applications in NoC. To solve such problem, we study a hybrid switching mechanism which can guarantee the quality of service for the real-time applications. The implementation is discussed in details and simulated by OPNET software under various traffic loads. The results show that the hybrid switching can provide good performance for real-time applications compared with that of the traditional single switching mechanism.