Goodput Improvement for MPTCP Based on Controlling the Difference of Delay

Due to the out of order problem, the goodput is usually far lower than the aggregated throughput. How to improve the goodput is a focus of researches. However, lots of them hardly consider the influence of the congestion window on out of order data. So, based on that, A goodput improvement solution based on controlling delay difference for the MPTCP (referred to as CDD-MPTCP) is put forward. By dynamically adjusting congestion window of each sub-streams, it can reduce end to end path delay, thus reducing out of order data. And, we also propose a data scheduling strategy based on the congestion degree of sub-streams to reduce the congestion during the transmission process. The NS-2 simulation results show that CDD-MPTCP can effectively decrease the amount of out of order data received at the receiver without loss of aggregate throughput.