Multipath TCP Control Scheme for Low Latency and High Speed XR Real-Time M&S Devices

Advancements in metaverse modeling & simulation (M&S) are becoming possible due to realization of extended reality (XR) systems, which combines mixed reality (MR) with advanced human-computer interaction (HCI) devices. To use these technologies appropriately, high performing system requirements, such as, high data rate and low latency, are required. For this, fifth-generation (5G) New-Radio (NR) technology that achieves high data rate, low latency, and massive connectivity can be applied. Although the mmWave technology adopted in 5G can satisfy high data rates by using high frequencies, it has a disadvantage of easily being vulnerable to blockage. To alleviate this problem, multi-path Transmission Control Protocol (MPTCP) which uses multiple Transmission Control Protocol (TCP) subflows can be used. However, MPTCP has a problem with its reordering delay that occurs due to mixed up packet arrival orders. To overcome this issue, in this paper, extensions to the linked increases algorithm (LIA) scheme are made to form the minimized reordering delay LIA (MRLIA) scheme, which is a new MPTCP congestion control scheme that increases the data rate by minimizing the reordering delay while using network resources fairly. Through simulation, it is confirmed that the proposed method can provide an improved performance compared to existing methods in terms of goodput and latency.