Method for avoiding output conflict between TT service and ET service in TTE network
A business and network technology, applied in the field of communication, can solve the problems of time-triggered network data transmission impact, physical link blocking, and low time accuracy, and achieve the effects of improving time sensitivity and data transmission efficiency, reducing delay, and reducing control signals
Active Publication Date: 2018-11-09
XIDIAN UNIV
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Problems solved by technology
The output interface of the time-triggered Ethernet switch needs to transmit time-triggered TT service data frames and event-triggered ET service data frames from different data channels. When the above data frames arrive at the same output module of the time-triggered Ethernet dedicated switch at the same time, There will be a problem of physical link blocking, which will affect the data transmission of the time-triggered network
[0005] Chinese patent 201210484945.6 proposes a link blocking solution based on time slot multiplexing. Although this method can reduce the waste of network bandwidth resources, this method is applied to each switch node, and all the time slots are allocated to the corresponding nodes. Physical link, and the time accuracy is not high, only millisecond level
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[0031] The present invention will be further described in detail below with reference to the accompanying drawings.
[0032] refer to figure 1 , the output part of the time-triggered Ethernet switch applied by the method of the present invention includes two data channels, an output scheduling polling module 3, an output arbitration module 4, and an output module 5, wherein:
[0033] The first data channel 1 carries time-triggered service data frames. The time-triggered service data frame adopts the Ethernet data frame format stipulated in the IEEE802.3 standard, and is used to carry time-triggered service data requiring high time precision in the time-triggered Ethernet network.
[0034] The second data channel 2 carries event-triggered service data frames. The event-triggered service data frame adopts the Ethernet data frame format stipulated in the IEEE802.3 standard, and is used to carry the event-triggered service data transmitted by the time-triggered Ethernet network....
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The invention discloses a method for avoiding output conflict between the TT service and the ET service in the TTE network and mainly aims to solve a problem of service transmission conflict in the time-triggered Ethernet in the prior art. The method comprises steps that the TT service is transmitted in a time window, and the ET service is transmitted in a non-time window; transmission operation is determined according to transmission service requirements and conditions; if the TT service needs to be transmitted and the current time is in the time window, the TT service is directly transmitted; if the TT service needs to be transmitted and the current time is not in the time window, the service is transmitted in a next time window; if the ET service needs to be transmitted and the transmission time conflicts with the time window, the service is transmitted after the conflict; if the ET service needs to be transmitted and the transmission time does not conflict with the time window, theservice is directly transmitted. The method is advantaged in that output conflict between the TT service and the ET service is avoided, time sensitivity of the TTE network is improved, and the methodcan be applied to data transmission of the network.
Description
technical field [0001] The invention belongs to the technical field of communication, in particular to a method for avoiding output conflicts between time-triggered TT services and event-triggered ET services, which can be applied to time-triggered Ethernet switching networks. Background technique [0002] With the sweeping of the wave of digitization, people have higher and higher requirements on the quality of data transmission. As an important part of the data transmission process, Ethernet technology is also constantly developing, especially the application of Ethernet technology to the industrial field to achieve global interconnection and better control of remote devices. [0003] Time-triggered Ethernet TTE is a real-time Ethernet solution. The packets of this solution are transmitted according to an exact time schedule. The transmission time delay of the packets is determined, and the accuracy of the time delay jitter is on the order of microseconds . Time-triggere...
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Login to View More IPC IPC(8): H04L5/00
CPCH04L5/0058H04L5/0078
Inventor 邱智亮王方圆潘伟涛曾磊张森陈郝明高宇飞陶凯
Owner XIDIAN UNIV