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Time deterministic transmission design method for time-triggered Ethernet TT service

A business time and time-triggered technology, applied in the field of computer networks, to achieve the effect of guaranteeing bandwidth and ensuring high-reliability transmission

Pending Publication Date: 2022-03-01
西安云维智联科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a time-triggered Ethernet TT service time deterministic transmission design method, to solve the technical problem that the reliability of TT service transmission needs to be further improved in the prior art

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  • Time deterministic transmission design method for time-triggered Ethernet TT service
  • Time deterministic transmission design method for time-triggered Ethernet TT service
  • Time deterministic transmission design method for time-triggered Ethernet TT service

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Embodiment

[0040] This embodiment provides a time-triggered Ethernet TT service time deterministic transmission design method, the method includes the following steps:

[0041] Step 1, gating schedule definition:

[0042] First define the gated scheduling table shown in Table 1: the depth of the scheduling table can be flexibly configured according to hardware resources, assuming n, (0≤n≤65536, and n∈Z), the bit width of the scheduling table is 64 bits, each A schedule table can be configured with a maximum of n schedules.

[0043] The schedule table is configured by the host computer. Each schedule represents a virtual link (VL) and the gating window of the schedule. Each schedule is configured strictly in chronological order, and each family cycle can be configured with a maximum of n schedules.

[0044] The entire scheduling is scheduled according to table items within a family cycle, and the same scheduling rule is used between family cycles. The scheduling cycle and the gate start ...

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Abstract

The invention provides a time-deterministic transmission design method for a time-triggered Ethernet (TT) service. The method comprises the following steps of: 1, defining a gating scheduling table; step 2, end system sending gating design; 3, the switch receives gating design; step 4, switch sending gating design; and step 5, end system receiving gating design. Compared with the traditional Ethernet, in the design method provided by the invention, the TT data frame is subjected to service scheduling strictly according to the family period and the pre-planned gating starting time point, and the transmission delay has certainty and low jitter. Compared with a traditional Ethernet data frame, in the design method of the invention, conflict-free reliable transmission of the TT data frame is realized through a pre-formulated scheduling rule, and the bandwidth and high-reliability transmission of the TT data frame are ensured. The design method provided by the invention can ensure that the packet loss problem of the TT data frame does not exist in network transmission.

Description

technical field [0001] The invention belongs to the technical field of computer networks, relates to time-deterministic Ethernet technology, in particular to a time-triggered Ethernet TT service time-deterministic transmission design method. Background technique [0002] In recent years, the real-time task requirements in industrial and aviation environments have put forward new requirements for the existing Ethernet, which has become a hot research topic in the industrial circles of various countries. More than 20 solutions are constantly competing to gain industry recognition. In the fierce competition, Time Triggered Ethernet (TTE, Time Triggered Ethernet) stands out, which combines the determinism, fault tolerance mechanism and real-time performance of time triggering technology with the flexibility, dynamic performance and "best effort" of ordinary Ethernet , providing support for synchronous, highly reliable embedded computing and networking, and fault-tolerant designs...

Claims

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Application Information

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IPC IPC(8): H04J3/06
CPCH04J3/0638
Inventor 王红春王国建王国栋程德玉刘丽程方圆
Owner 西安云维智联科技有限公司
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