US 2009/0022055 A1 · SYSTEMS AND METHODS FOR IMPROVING TCP-FRIENDLINESS OF DELAY-BASED CONGESTION CONTROL

Abstract

Disclosed herein is a novel technique that greatly improves the TCP-friendliness of CTCP over such under-buffered network links without degrading the protocol efficiency to utilize the link capacity. Instead of using a pre-defined threshold, the disclosed approach, which may be referred to herein as “CTCP-TUBE,” dynamically adjusts the threshold based on the network setting in which the flow is operating. The backlogged packets of a regular TCP may be estimated along the same path by emulating the behavior of a regular TCP flow in runtime. Based on this, a threshold is set so as to ensure good TCP-friendliness. CTCP-TUBE can automatically adapt to different network configurations and also concurrent competing flows.

Claims17

Dependent claims

A method for improving TCP-friendliness of delay-based congestion control, the method comprising:

choosing an initial value for a bottleneck queue size threshold;
estimating the bottleneck queue size once every round trip interval;
estimating a number of backlogged packets of a regular transfer control protocol (TCP) flow;
detecting that a packet loss has occurred;
and
upon detection that a packet loss has occurred, updating the value of the bottleneck queue size threshold based on the estimated number of backlogged packets of the regular TCP flow calculated during the round trip interval immediately preceding the round trip interval in which the packet loss was detected.

3 more elements

Dependencies are inferred from the claim text.

Systems and methods for improving tcp-friendliness of delay-based congestion control

Life of this patent

Systems and methods for improving tcp-friendliness of delay-based congestion control

Life of this patent

Abstract

Claims17