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We generally utilize high-speed transport protocols to transfer and share large-scale data in long-distance broadband networks. However, the difference in performance between protocols when some kinds of protocols share the same link increases. Consequently, we propose a control method of discarding packets corresponding to protocol types that takes into consideration high-speed performance and fairness of flows. We evaluated the efficiency of our method in simulations. As a result, we found that it could allocate bandwidth equally while retaining high link utilization.