MPTCP Protocol Research Articles

Seamless Handoffs in Wireless HetNets: Transport-Layer Challenges and Multi-Path TCP Solutions with Cross-Layer Awareness

Complications and performance issues resulting from handoffs have widely been overlooked by transport layer protocols. In mobile scenarios, layer 2 protocols begin to see issues, especially when multiple handoffs are imminent. Differentiating between delay caused by actual packet loss and congestion on the current link and delay simply caused by handoffs is an important distinction where transport layer protocols fall short. With current advancements in technology, traditional TCP reform is needed to accommodate a growing mobile culture. MPTCP is a new evolution of TCP that enables multiple paths or subflows and connections to be used transparently to applications. This is essential in a dynamically changing network as each subflow runs independently, allowing the connection to be maintained. In this article, we present our findings on transport layer handoff issues in currently deployed networks. We then discuss the use of MPTCP as a potential solution to address handoff-related and mobility-related service continuity issues. Finally, we propose cross-layer techniques for potential solutions to consider when designing a handoff-aware MPTCP protocol.

Transmission Control of MPTCP Incast Based on Buffer Balance Factor Allocation in Data Center Networks

The multi-home host will become increasingly popular within IPv6, especially in data center Fat-tree networks. MPTCP protocol is designed to transmit over multipath load, providing users with transparent multi-path utilization and high data transmission rate. As the characteristics of Many-to-one pattern and a large number of short bursts, all of flows collide on the shared link and same output port, creating an inevitable bottleneck collapse during transmission process. In order to avoid the collapse of throughput and improve the throughput of the receiving end, the MPTCP protocol in the data center network should have the characteristics of minimal packet loss and rapid convergence. In this paper, we focus on throughput collapse avoidance and design a MPTCP Transmission Control method based Queuing Cache Balance Factor called QCBF in Multi-homed FatTree topology. This method can realize the sub-flows are allocated by the size of ToRs cluster cache. We first propose a buffer pool balance factor and build a ToRs cluster cache balance queue. Then according to ToRs cluster cache allocation to calculate a sub-flow congestion window value. QCBF not only avoids the MPTCP Incast problem effectively, but also makes full use of the aggregate bandwidth. Based the software NS3, the experiment results of experiment show the QCBF transmission control method could avoid loss of packet, and achieve the load balance of MPTCP data transmission.

Intelligent approaches for security technologies

Intelligent approaches for security technologies

MPTCP protocol misbehaviour in high-speed, uncongested network

ABSTRACTMultipath transmission control protocol (MPTCP) protocol is an extension of the well-known TCP transport protocol that enables transmission over multiple paths. The MPTCP is an answer to multihoming, where a single host (here an MPTCP sender or receiver) is connected to multiple networks, using different network interfaces (network cards). The paper is focused on the problem of misbehaviour of the MPTCP protocol in high-speed, uncongested networks. The problem was discussed on the basis of experiments that were carried out in a private test cloud. In the experiments, a large file of 10 GB was transmitted between components of the cloud. Transmission was performed using MPTCP protocol conveying data through high-speed (900 Mbps) 802.11ac links. Results show that the reduced aggressiveness of the MPTCP caused problems with utilisation of unloaded paths and problems with fair resource sharing with the TCP protocol.