Low-time-delay message forwarding method and gateway

Abstract

The invention discloses a low-time-delay message forwarding method and a gateway, and relates to the technical field of network communication. The low-time-delay message forwarding method comprises the following steps: after a gateway receives a flashing initialization control instruction sent by an upper computer or a T-BOX, obtaining a to-be-upgraded ECU, and controlling the communication of other ECUs on the network segment where theto-be-upgraded ECU is located to be silent, and the upper computer or the T-BOX to be directly connected with the to-be-upgraded ECU, wherein the flashing initialization control instruction comprises a to-be-upgraded ECU and a network control instruction; and when the gateway forwards an upgrading message sent by the upper computer or the T-BOX to the to-be-upgraded ECU, or forwards a response message returned by the to-be-upgraded ECU to the upper computer or the T-BOX, performing unvarnished transmission on the upgrading message or the response message with the preset identifier. According to the invention, in a message forwarding process, ID analysis and data packing are not needed, the message needing to be forwarded is obtained only through filtering of the preset identifier, and data unvarnished transmission can be directly carried out, so that the forwarding efficiency of data flow flashing by software is effectively improved, and the forwarding delay theoretically can reach within 10% of bit time.

Description

technical field [0001] The present application relates to the technical field of network communication, in particular to a low-delay message forwarding method and a gateway. Background technique [0002] At present, the central gateway forwards the packets received from the source network segment to the target network segment according to the functional requirements of the vehicle, so as to realize the packet routing function. The above-mentioned forwarding process mainly has the following two modes: one is the first-in-first-out queue mode (FirstInput First Output, FIFO), and the other is the highest priority first sending mode ((Most Priority First Out, MPFO). [0003] In related technologies, through the above-mentioned first-in-first-out queue mode or the highest priority first-to-send mode, the vehicle network function requirements can be better fulfilled, and common diagnostic read-write message forwarding requirements can be met. [0004] However, when the ECU (Elect...

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