Performance Problems of Multipath Tcp Flow Control and Congestion Control
Recent mobile terminals are equipped with more than one network interfaces. In order to utilize multiple interfaces in TCP communication at the same time, the multipath TCP (MPTCP) is standardized. Since MPTCP has been introduced recently, it has some problems in its data transfer function. For example, the data throughput will be degraded when the send socket buffer is limited even if the receive socket buffer is sufficient. As another example, the standard congestion control algorithm may provide poor throughput when an MPTCP connection coexist with a single path TCP connection. This paper explains the details of these problems through experimental performance evaluation.
Keywords - Multipath TCP, TCP Congestion Control, Linked Increase Adaptation, TCP Reno, CUBIC TCP.