System-on-chip-based network protocol in consideration of network efficiency

A network protocol for data transfer between an initiator that is an interface initiating communication over a network and a destination that is an interface responding to the communication initiation of the initiator, wherein:

• a command signal containing an instruction is transferred via a channel between the initiator and the destination, the instruction defining a meaning and a characteristic of information contained in a transfer signal transferred from the initiator to the destination via a channel or in a response signal transferred from the destination via the channel,
• a most significant bit of the command signal indicates a priority corresponding to a transaction between the initiator and the destination in the network when the instruction contained in the command signal corresponds to the first transfer signal transmitted via the channel, and indicates whether the transfer signal is a last transfer signal transferred between the initiator and the destination when the instruction contained in the command signal corresponds to the transfer signal following the first transfer signal that a highest priority is assigned to a transaction between the initiator and the destination in the network when the instruction contained in the command signal corresponds to address information contained in the transfer signal and response information contained in the response signal, and indicates last data of a signal transferred between the initiator and the destination when the instruction contained in the command signal corresponds to control information contained in the transfer signal and data contained in the transfer signal and the response signal,
• the control information contained in the transfer signal further includes a priority field, and
• a priority of the transaction is determined based on a value obtained by combining the most significant bit of the command signal and the priority field.