Adaptive vertical routing method based on network on chip and routing unit

Abstract

The invention discloses an adaptive vertical routing method based on a network on chip and a routing unit. The routing method comprises steps of determining the direction of the next transmission node based on the relationship between the current node coordinate position and the destination node coordinate position of the transmitted data each time when the data are transmitted from the source node to the destination node, so that when the source node is at the upper position of the destination node, transmission is firstly performed in the vertical direction and then in the horizontal direction, when the source node is in the lower position of the destination node, transmission is firstly performed in the horizontal direction and then in the vertical direction, and when the source node and the destination node are in the same layer, transmission is directly performed in the horizontal direction. The routing unit comprises an input / output interface unit, an input / output selection unit and a direction calculation unit. The adaptive vertical routing based on the network on chip is achieved, the implementation method is simple, the transmission time is less, the transmission congestion is avoided, and the temperature control and the flexible transmission are realized at the same time.

Description

technical field [0001] The invention relates to the technical field of microprocessor on-chip network transmission, in particular to an adaptive vertical routing method and a routing unit based on an on-chip network. Background technique [0002] With the development of modern technology, the network-on-chip structure has gradually become a popular structure for VLSI design, but this structure also produces a large number of temperature problems while increasing performance, including reducing the global interconnection line in order to improve transmission efficiency. The length, and the lower power consumption provides greater bandwidth, the shortening of interconnect lines and the increase of traffic speed up the generation of heat, etc.; at the same time, due to the constraints of area and timing, the arrangement of many cores has become more Tight, block stacking makes heat dissipation more difficult. At the same time, the 3D-NoC structure makes the heat dissipation pat...

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Problems solved by technology

[0005] At present, in network-on-chip transmission, it is usually used to fix all the transmissions on the bottom layer before reaching congestion. Vertical transmission leads to increased delay. For example, when both the source node and the destination node are at the top layer, if the above routing method is used to route downwards, a large number of redundant vertical transmissions will be added, which will greatly increase the length of the transmission path, which not only increases the delay but also increases the delay. Increased the burden on the bottom; if the source node is on the lower layer and the destination node is on the top layer, if the above routing method is used to transmit vertically and then horizontally, the transmission will appear on the top layer, which will make the heat dissipation path of the top layer long and cause the problem of overheating

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