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TSN bandwidth reservation system and bandwidth reservation value calculation method and device

A technology of bandwidth value and bandwidth, which is applied in the field of bandwidth reservation system, can solve problems such as inability to guarantee stable transmission delay and low bandwidth utilization

Active Publication Date: 2021-04-27
PURPLE MOUNTAIN LAB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are currently two allocation methods: (1) Static allocation, mechanical allocation of bandwidth, once allocated, it will not change, and the bandwidth utilization rate at this time is low, which cannot meet most scenarios
(2) Dynamic allocation, mostly using the request / authorization mechanism, overcomes the shortcomings of static allocation, but cannot guarantee the stability of transmission delay

Method used

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  • TSN bandwidth reservation system and bandwidth reservation value calculation method and device
  • TSN bandwidth reservation system and bandwidth reservation value calculation method and device
  • TSN bandwidth reservation system and bandwidth reservation value calculation method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A TSN bandwidth reservation system, the bandwidth reservation system includes a TSN device, a TSN-SDN controller and a TSN switch; wherein,

[0037] The TSN device is used to send a bandwidth reservation request, send and receive traffic data, encapsulate the data into a TSN protocol, and send parameters related to the bandwidth reservation request to the controller;

[0038] The TSN-SDN controller is used to discover the network topology, receive the bandwidth reservation request from the TSN device, schedule and calculate the forwarding path of the data flow and the reserved bandwidth value, and configure the routing table and reservation table configuration after calculation, etc. Send it to the switch device;

[0039] The TSN switch forwards the data flow according to the configuration items issued by the TSN-SDN controller, and the forwarding can use different bandwidths to forward the corresponding data flow according to the source and destination mac addresses or...

Embodiment 2

[0044] The TSN-SDN controller in the above system calculates the reserved bandwidth value according to the set requirements, and the reserved bandwidth value takes effect in the specified time slot; the TSN-SDN controller according to the time slot, for the data in the transmission path The flow sending port generates the corresponding bandwidth reservation table.

[0045] Further, the standard for the TSN-SDN controller time slot to take effect is that among all the reserved bandwidth values ​​of the current link, there is a time intersection with the reserved time slot and the sum of the reserved values ​​in the same transmission direction plus the current reserved The value is less than the bandwidth value of the current link.

[0046] Furthermore, the content of the bandwidth reservation table is one or more of device information, port information, time slots, traffic characteristics, bandwidth reservation value, and cycle; the TSN-SDN controller query is connected to it Th...

Embodiment 3

[0050] This embodiment is a data processing method based on the uplink number TSN-SDN controller. After receiving the configuration information, the controller generates a routing table and a reservation table through bandwidth reservation value and time slot calculation. The main steps are:

[0051] 1) Extract traffic information from configuration information and sort traffic according to priority, load topology information from the controller, and calculate supercycle (least common multiple of all flow cycles);

[0052] 2) Cyclic processing and calculation of each flow, if there is no data flow to be processed, proceed to the next step:

[0053] a) Combining with the network topology, find out each available path, and arrange the collection according to the shortest path first;

[0054] b) Select one of the path queue sets to start calculating the reserved bandwidth, if there is no remaining path to choose, then the reservation fails and returns to step 2;

[0055] c) cycl...

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PUM

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Abstract

The invention provides a TSN bandwidth reservation system and a bandwidth reservation value calculation method and device, and the system mainly comprises a TSN-SDN controller which is used for discovering a network topology, receiving a reservation request transmitted by equipment, calculating a forwarding path and a reserved bandwidth value of a data flow, and issuing routing table configuration and reserved table configuration; and enabling the TSN switch to forward the data flow according to the configuration item issued by the controller, and forward the corresponding data flow by using different bandwidths according to the configuration. The calculation method mainly comprises the steps of firstly determining related parameters such as network topology, then finding out all available forwarding paths of flow, then calculating a bandwidth value needing to be reserved for each hop according to time delay requirements of the paths and the flow, and finally checking whether a corresponding time slot has enough bandwidth value which can be reserved or not. According to the system and the method, the transmission delay of the target traffic can be effectively guaranteed, the transmission jitter is reduced, and the system and the method can be well applied to automatic driving and other industrial Internet scenes.

Description

technical field [0001] The invention belongs to the field of network communication technology, vehicle-mounted network and new industrial Internet, and specifically relates to a bandwidth reservation system specific to time slots periodically in a TSN (Time Sensitive Networking) scenario. Background technique [0002] TSN (Time Sensitive Networking, Time Sensitive Networking) refers to a set of "sub-standards" formulated based on specific application requirements under the IEEE802.1 standard framework, aiming to establish a "universal" time-sensitive mechanism for the Ethernet protocol to ensure that the Time determinism of data transfer. TSN is located at the data link layer, changing the uncertainty of Ethernet from the underlying architecture, triggering a self-iteration of Ethernet itself. [0003] The bandwidth reservation technology is well applied in the access network, and it successfully solves the problems of network reliability, user experience, and effective all...

Claims

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Application Information

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IPC IPC(8): H04L12/24H04L12/741H04L12/911H04L45/74
CPCH04L41/0896H04L41/12H04L45/74H04L47/72
Inventor 朱海龙苏建忠谢人超黄韬
Owner PURPLE MOUNTAIN LAB