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  • Open Access


    TCPW BR: A Wireless Congestion Control Scheme Base on RTT

    Liwei Tian1, 2, *, Jinfeng Li3, Longqing Zhang2, Yu Sun4, Lei Yang2

    CMC-Computers, Materials & Continua, Vol.62, No.1, pp. 233-244, 2020, DOI:10.32604/cmc.2020.06135

    Abstract The wireless network is limited by the transmission medium, and the transmission process is subject to large interference and jitter. This jitter can cause sporadic loss and is mistaken for congestion by the congestion control mechanism. The TCP Westwood protocol (referred to as TCPW) is such that it cannot distinguish between congestion loss and wireless jitter loss, which makes the congestion mechanism too sensitive and reduces bandwidth utilization. Based on this, the TCPW protocol is modified based on the estimate of the Round-Trip Time (referred to as RTT) value-called TCPW BR. The algorithm uses the More >

  • Open Access


    3D Bio-Plotted Tricalcium Phosphate/Zirconia Composite Scaffolds to Heal Large Size Bone Defects

    Pranav S. Sapkal1,*, Abhaykumar M. Kuthe1, Shantanu Mathankar2, Akash A. Deshmukh

    Molecular & Cellular Biomechanics, Vol.14, No.2, pp. 125-136, 2017, DOI:10.3970/mcb.2017.014.123

    Abstract β-TCP-Zirconia scaffolds with different architectures were fabricated by means of 3D-Bioplotting in order to enhance the mechanical and in-vitro ability of the scaffold to heal large size bone defects. In the present study scaffold architecture with different strand orientations (0°-90°, 0°-45°-135°-180°, 0°-108°-216° and 0°-72°-144°-36°-108°) were fabricated, characterized and evaluated for mechanical strength and cell proliferation ability. β-TCP powder (25 µm) and PVA (Polyvinyl Alcohol) was acquired from Fisher Scientific, India. Zirconia (18 to 32 µm) was procured from Lobachemie, India. In brief 7.5%, PVA in distilled water was used as a binder and was mixed… More >

  • Open Access


    A MPTCP Scheduler for Web Transfer

    Wenjun Yang1, Pingping Dong1,2,*, Wensheng Tang1, Xiaoping Lou1, Hangjun Zhou3, Kai Gao4, Haodong Wang5

    CMC-Computers, Materials & Continua, Vol.57, No.2, pp. 205-222, 2018, DOI:10.32604/cmc.2018.03726

    Abstract Multipath TCP (MPTCP) is the most significant extension of TCP that enables transmission via multiple paths concurrently to improve the resource usage and throughput of long flows. However, due to the concurrent multiple transfer (CMT) in short flow trans-mission, the congestion window (cwnd) of each MPTCP subflow is too small and it may lead to timeout when a single lost packet cannot be recovered through fast retransmission. As a result, MPTCP has even worse performance for short flows compared to regular TCP. In this paper, we take the first step to analyze the main reason… More >

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