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Data center networks often use multi-rooted Clos topologies to provide a large number of equal cost paths between two hosts. Thus, load balancing traffic among the paths is important for high performance and low latency. However, it is well known that ECMP—the de facto load balancing scheme—performs poorly in data center networks. The main culprit of ECMP’s problems is its congestion agnostic nature,...
4G/3G Networks have been widely deployed around the world to provide high wireless bandwidth for mobile users. However, the achievable 3G/4G bandwidth is still much lower than their theoretic maximum. Signal strengths and available backhaul capacities may vary significantly at different locations and times, often leading to unsatisfactory performance. Band-width aggregation, which uses multiple interfaces...
Network faults like link or switch failures can cause heavy congestion and packet loss. Traffic engineering systems need a lot of time to detect and react to such faults, which results in significant recovery times. Recent work either pre-installs a lot of backup paths in the switches to ensure fast reroute, or proactively pre-reserve bandwidth to achieve fault-resiliency. Our idea agilely reacts...
Concurrent Multipath Transfer (CMT-SCTP) using the Stream Control Transmission Protocol (SCTP) over multiple paths can achieve an aggregated transmission throughput much greater than a single path. A problem arises when the fair round robin scheduling (RRS) in CMT-SCTP allows the slow paths to affect the overall throughput due to out-of-sequence data at the receiver. Data along the slow and fast paths...
Concurrent multipath transfer using the stream control transmission protocol (CMT-SCTP) enables multi-interface devices to send data simultaneously over multiple paths. The multipath transfer requires special handling in real life practice due to the different path characteristics, such as a path using 4G and a path using Wi-Fi. Moreover, for smartphones and other portable devices, the resources,...
An efficient multipath transport is an emerging issue because it provides greater aggregated throughput than the usage of one active path. An extension of the stream control transmission protocol that serves the multipath transport is the concurrent multipath transfer (CMT-SCTP). Using the CMT-SCTP over dissimilar paths is a challenge. Two paths are dissimilar if they possess different characteristics...
In this study we implement CMT-SCTP (Concurrent Multipath Transfer extension of the Stream Control Transmission Protocol) in a real lab Internet setup. SCTP is an innovative transport layer protocol, which is reliable and provides services such as multihoming and multistreaming. CMT extension allows simultaneous utilization of multipaths for reaching the higher data transmission rate between two hosts,...
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