On-chip network data transmission device and method with cascade protection function

Abstract

The invention discloses an on-chip network data transmission device and method with a cascade protection function and belongs to the technical field of multi-core chips. The device comprises a data coding unit, a head protection unit and a data decoding unit, wherein the data coding unit is used for achieving fault-tolerant coding of all data of a data package; the head protection unit is used for achieving skip-to-skip protection for a head chip; the data decoding unit is used for achieving decoding of the data package, requesting end-to-end retransmission when the number of errors exceeds the error correcting capability of adopted codes, and thus achieving end-to-end protection for the data package. Meanwhile, the invention discloses the on-chip network data transmission method with the cascade protection function. Reliable protection is conducted at the two stages of the data package and the chip, namely, the end-to-end protection is conducted on the data package and the skip-to-skip protection is conducted on the head chip, and the method can be achieved through the device. The device and method not only ensure on-chip network reliability, but also achieve data transmission which is low in power consumption and short in delay time.

Description

technical field [0001] The invention relates to the technical field of multi-core chips, in particular to a hierarchically protected on-chip network data transmission device and method. Background technique [0002] Network-on-Chip (NoC) is widely considered to be the most promising communication infrastructure in large-scale multi-core chips. [0003] Due to the limitations of the on-chip network router cache, the packets transmitted in the on-chip network are divided into smaller units - flits (flit) for transmission. These slices are further divided into headflits and dataflits. The header contains the routing information of the data packet, that is, the routing of the entire data packet is determined by the header, and the data follows the header and moves to the target node. [0004] However, various software and hardware errors (such as single-event flip (soft error, crosstalk, etc.)) may cause the transmission failure of the network on chip. For example, an error i...

AI Technical Summary

Problems solved by technology

[0005] The usual methods are mainly divided into two categories: one is to rely on end-to-end (end-to-end) retransmission solutions, but when the error rate increases, the delay overhead caused by retransmission will greatly increase, seriously affecting the network on chip. transmission performance

The other is to implement strict hop-by-hop protection for all data, but this method will lead to a large router cache overhead and a sharp increase in transmission power consumption

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