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A multi-feature stream access method for tsn network

An access method and multi-featured technology, which is applied in the field of computer networks, can solve problems such as damage reliability, time-sensitive data packet loss, bandwidth guaranteed flow packet loss, etc., and achieve the effect of deterministic transmission bandwidth

Active Publication Date: 2021-02-09
ZHEJIANG LAB
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] 1. In the queue receiving cycle, if the time-sensitive flow from multiple ports exceeds the size of Q0 or Q1, it will inevitably cause packet loss of time-sensitive data, so that deterministic delay cannot be guaranteed
[0008] 2. If the bandwidth-guaranteed flow and time-sensitive flow from multiple ports are sent from the same port at the same time, exceeding the total bandwidth of the port, it will cause packet loss of the bandwidth-guaranteed flow, thus destroying the reliability and requiring the sacrifice of additional bandwidth for retransmission

Method used

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  • A multi-feature stream access method for tsn network
  • A multi-feature stream access method for tsn network
  • A multi-feature stream access method for tsn network

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Embodiment Construction

[0037] In order to make the purpose of the present invention more clear, the technical solutions of the present invention will be further described below in conjunction with the accompanying drawings.

[0038] The invention provides a multi-feature stream access method for a TSN network, comprising the following steps:

[0039] Step 1: Synchronize the user host and network equipment; those skilled in the art can use 1588, 1588V2, IEEE802.1AS, etc. for synchronization;

[0040] Step 2: The CUC functional unit in the TSN network collects the requirements of the user host. There are R time-sensitive flows and S bandwidth-guaranteed flows in the TSN network. For the i-th time-sensitive flow, the user host provides a sending cycle T i , the maximum amount of data sent in each cycle is B i byte; for the jth guaranteed bandwidth flow, the user host provides the reserved bandwidth W j , W j <1;

[0041] Step 3: After the CUC functional unit collects the requirements of the user hos...

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Abstract

The invention discloses a multi-feature flow access method used for a TSN network. The method comprises the steps of: dividing flow in a network into periodic time-sensitive flow and bandwidth guarantee flow according to characteristics, and forwarding the flow as much as possible; performing conditional constraints at a data sending end to schedule a sending time point and a bandwidth of a time-sensitive flow so as to ensure the sending data volume of the flow; and shaping the bandwidth guarantee flow through an improved CBS algorithm, so that the time determinacy of the time-sensitive flow and the flow determinacy of the bandwidth guarantee flow after passing through the CQF switch are guaranteed, and data loss caused by overflow of a circular queue or exceeding of the maximum bandwidthof a port after passing through the CQF switch is avoided.

Description

technical field [0001] The invention relates to the technical field of computer networks, in particular to a method for accessing a multi-feature stream used in a TSN network. Background technique [0002] Time-sensitive network (TSN) is a new industrial communication technology that is being actively promoted by the international industry. Among them, the sub-protocol IEEE Std 802.1Qch defines a scheme to provide deterministic transmission delay for time-sensitive flows. It provides a deterministic transmission technology based on CQF (cyclic queuing and for forwarding, cyclic queue), assuming that the path has h hops, The data stay time in each switch is d, then the maximum delay after passing through the CQF switch is (h+1)*d, and the minimum delay is (h-1)*d. [0003] The basic principles of scheduling on the existing CQF switch side are as follows: [0004] Set up two queues Q0 and Q1 controlled by time gates for time-sensitive frames at the output port of the switch....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/24H04L12/801
CPCH04L41/0896H04L47/12
Inventor 张磊吴少勇王延松
Owner ZHEJIANG LAB
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