37 results about "Bottleneck bandwidth" patented technology

A novel packet filtering and processing mechanism solves bandwidth estimation problems related to cross-traffic, host limitations, and fabric-specific issues in order to accurately estimate bottleneck bandwidth in fluctuating environments such as home networks. In particular, the process controls the number of packet train experiments, the size of trains and packets within trains, and other factors to eliminate errors due to cross-traffic, network capture, receiver CPU overload, interrupt moderation, and other networking factors. In an embodiment of the invention, a history window is applied to estimates derived from individual trains to ensure that data used to make a bottleneck bandwidth estimate was taken at a time when the network is relatively stable.

The present invention provides an available bandwidth measurement method and device. The method comprises the following steps: a sending end sends at least two test data packets to a receiving end of a to-be-measured transmission path in sequence after a first packet sending time interval, wherein the first packet sending time interval is used for making the throughput at the transmission bottleneck of the to-be-measured transmission path reaches the bottleneck bandwidth at the transmission bottleneck; the sending end receives response data packets of the at least two test data packets sent by the receiving end, wherein the length of each response data packet is smaller than a preset length threshold; the sending end determines an actual receiving rate of the to-be-measured transmission path on an uplink direction from the sending end to the receiving end according to the response times of the response data packets of the at least two test data packets, wherein the response time of the response data packet of any test data packet is the time from the sending moment of the test data packet to the arrival of the response data packet at the sending end; and the available bandwidth of the to-be-measured transmission path on the uplink direction is determined according to the actual receiving rate.

The invention discloses a multi-path TCP congestion control method. The method comprises the steps that firstly, substream weight factors for describing network environment features of different substreams in a multi-path TCP are introduced into a google BBR congestion control algorithm; secondly, convergence features of the different substreams of different multi-path TCP sessions at a shared bottleneck link when the different substreams deploy the congestion control algorithm are analyzed, and a weight-bandwidth model is built; thirdly, bottleneck bandwidth parameters and background stream parameters for recovering the shared bottleneck link weight-bandwidth model are calculated; and finally, traffic migration is achieved by taking the network fairness as a principle and utilizing a distributed substream weight factor updating iteration algorithm according to bottleneck bandwidth parameters and background stream parameters which are reproduced by the various substreams at different shared bottleneck links, and finally the network fairness guarantee is achieved.