Abstract
As discussed in Chap. 5, because many factors contribute to the end-to-end path delay, ACC cannot eliminate the delay difference among paths. This chapter introduces an extension module, namely, differentiated packet forwarding (DPF) [5], for MPTCP [3] in a user cooperation scenario to further improve the goodput at the destination. DPF takes advantage of the relays to buffer out-of-order packets and only forwards the packets in an expected DSN range to the destination. A fast ACK scheme can be used at the relays to return ACK messages to the source on behalf of the destination so as to reduce the ACK delay and avoid the unnecessary decreasing of the congestion window caused by packet buffering at the relays. The simulation results show that DPF significantly improves the goodput of MPTCP. In addition, the overall performance with ACC [8], DPF [5] and SSRS [6] working together is evaluated. It is found that the three modules are complementary and can achieve the best goodput performance.
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References
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Zhou, D., Song, W. (2014). Differentiated Packet Forwarding (DPF). In: Multipath TCP for User Cooperation in Wireless Networks. SpringerBriefs in Computer Science. Springer, Cham. https://doi.org/10.1007/978-3-319-11701-0_6
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DOI: https://doi.org/10.1007/978-3-319-11701-0_6
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