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Congestion control method based on advertised window and multi-flow coordination in data center network

A data center network and notification window technology, which is applied in data exchange networks, digital transmission systems, electrical components, etc., can solve problems such as unfair throughput, achieve unfair throughput, use bandwidth efficiently, and reduce the speed of window addition Effect

Active Publication Date: 2017-07-14
CENT SOUTH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a congestion control method based on notification window and multi-flow coordination in a data center network to solve the problem of unfair throughput

Method used

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  • Congestion control method based on advertised window and multi-flow coordination in data center network
  • Congestion control method based on advertised window and multi-flow coordination in data center network
  • Congestion control method based on advertised window and multi-flow coordination in data center network

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Experimental program
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Embodiment Construction

[0041] see figure 1 , the realization process of the present invention includes:

[0042] Step 1: n is initialized as the number of flows aggregated to the receiving end; the notification window awnd of TCP flow i i Initialized to 2*MSS, notification window threshold value awnd_loss i Initialized to +∞, RTT i Initialized to the round-trip delay when the connection is established; sum_pktLoss is initialized to 0.

[0043] Step 2: avg_RTT is initialized as the average round-trip delay of each TCP stream, and the round-trip delay sampling value RTT according to TCP stream i i renew. When the TCP flow i has no packet loss, the RTT i Equal to the current round-trip delay. When packet loss occurs on TCP flow i, RTT i constant. The specific calculation formula of avg_RTT is as follows:

[0044]

[0045] sum_awnd is initialized as the sum of the proportions of each TCP flow notification window, and the round-trip delay is updated every round. The specific calculation formu...

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Abstract

The invention discloses a congestion control method in a data center network based on a notification window and multithread collaboration. The notification window of TCP convergence flow is adjusted at a TCP receiving end in a collaborated mode according to the circular delay proportion and the packet loss situation, and efficient congestion is implemented while the throughput rate of all TCPs is fair. The congestion control method can be adopted under various delay, topology and communication modes, the high throughput rate and fairness are guaranteed, and efficient congestion control in the data center network is achieved.

Description

technical field [0001] The invention relates to a congestion control method in a data center network (DCN, Data Center Network) based on an advertisement window and multi-flow coordination. Background technique [0002] In recent years, data centers have become the infrastructure for large-scale information storage, computing, and interaction. More and more enterprises and individuals are migrating online application services to large data centers such as Amazon EC2. However, the fragmentation of data center resources and the heterogeneity of topology make the existing transmission control protocol TCP appear new problems. [0003] In a traditional WAN environment, TCP flows compete with each other, and the throughput rate is inversely proportional to the round-trip delay. That is, under the same conditions, TCP streams with short round-trip delays are more aggressive and occupy a lot of bandwidth. However, P.Prakash et al. pointed out that there is a completely opposite ...

Claims

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Application Information

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IPC IPC(8): H04L12/801
Inventor 王建新韩瑞黄家玮董苹苹盛羽
Owner CENT SOUTH UNIV