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Many of packet loss as a result of factors other than congestion impact the performance of TCP in wired/wireless hybrid networks. Firstly, this paper proposes one concept of Congestion Probability (CP) and analyzes the correlation of CP and network state. Then a Transport Control Protocol named as TCP-PCP is proposed, which is based on the Prediction of Congestion Probability instead of single loss event. Depending on the ECN mechanism, TCP-PCP calculates the value of CP by analyzing some latest loss events. The TCP-PCP sender's behavior is controlled by the change of CP value. Simulation results show that TCP-PCP can improve TCP performance more efficiently than Westwood and Jersey.
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