Time-triggered service repeater and method adapted to different transmission rates

Abstract

The invention provides a time-triggered service repeater and method adapted to different transmission rates. The repeater comprises a filtering module, a full interconnection switching network module,a scheduling module, and a buffer area module. The method comprises the following steps: obtaining current window information, pre-fetching the next window information, opening a receiving window, receiving a data frame, judging the correctness of a service identification number, writing the data frame into a buffer area, performing cyclic redundancy check on the data frame, discarding the data frame which is wrong or the frame length is too large, closing the receiving window, reading the data frame from the buffer area and outputting the same to the outside, and modifying the current windowinformation. According to the time-triggered service repeater and method provided by the invention, under the time-triggered Ethernet standard, time-triggered service data frames of different transmission rates received by the switching node are filtered and forwarded, and meanwhile the manner of pre-fetching the next window scheduling information is adopted to reduce he requirements of the repeater on the external scheduling information input rate.

Description

technical field [0001] The invention belongs to the technical field of communication, and further relates to a time-triggered service transponder and a method adaptable to different transmission rates in the technical field of network communication. The invention can realize filtering and forwarding of time-triggered service data frames received by transponders in a time-triggered Ethernet system with different transmission rates under the time-triggered Ethernet standard. Background technique [0002] In order to meet the needs of industrial control systems for inter-node communication capabilities, people hope to apply low-cost, high-bandwidth, and high-flexibility Ethernet technology to industrial control networks. However, the transmission of data packets in the Ethernet standard is "best effort", which cannot guarantee the real-time and integrity of key control data transmission. In order to solve this problem, the International Society of Automaton Engineers proposed ...

AI Technical Summary

Problems solved by technology

The disadvantage of this device is that the data buffer lacks the filtering function of overly long data frames and cannot discard overly long data frames, resulting in excessively long data frames occupying network bandwidth

The disadvantage of this device is that there is no buffer area for data frames inside the switching layer, and the transmission rate cannot be changed when the data frames are transmitted in the data channel inside the transponder, so the device cannot complete the forwarding of data frames with different transmission rates

The disadvantage of this method is that the scheduling module reads the next piece of scheduling information after outputting the data frame. Since the reading of the next piece of scheduling information must be completed before the start of the next forwarding, when the time interval between two forwardings is short, this method High-speed readout of scheduling information is required

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