A data communication method and device

Abstract

The embodiments of the present application relate to the field of communication technology, and in particular to a data communication method and device, which are used to reduce the time delay in the data communication process and ensure end-to-end QoS requirements. Applied in a data communication network including at least two switching layers, the at least two switching layers include a first layer and a second layer, the first layer includes a first electrical node and a second electrical node, and the second layer includes at least one optical node and a third electrical node, the first electrical node includes a first virtual output queue (VOQ), the method includes: the first electrical node sends request information to the second electrical node, and the request information is used to request the expected data amount quota of the first VOQ , at least one first data packet sent to the second electrical node is stored in the first VOQ; the response information is received, and the response information includes the target data volume quota; the target data volume quota is used to send to the second electrical node through at least one optical node at least one first data packet.

Description

technical field [0001] The embodiments of the present application relate to the field of communication technologies, and in particular, to a data communication method and device. Background technique [0002] A data center network (Dater Center Network, DCN) generally adopts the Fat-Tree networking mode to provide a fully connected network for many servers (Server) in the data center, and exchange data between different servers. With the continuous improvement of data center bandwidth requirements, the industry has proposed a hybrid networking method that replaces some switching nodes in the core (Core) layer of the fat-tree network with optical switching to achieve the purpose of saving power consumption and improving bandwidth. . [0003] For example, if figure 1 The network shown includes an access layer (also referred to as a TOR layer) and a core layer, and the core layer uses a mixed networking mode of electrical switching (that is, E nodes) and optical switching (th...

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Problems solved by technology

[0004] However, the nodes at the access layer in the above method need a considerable buffer to distinguish between large and small flows

And this will introduce additional delay

In addition, the scheduling process of optical switching itself is relatively complicated, and only coarse-grained scheduling can be realized, so it is difficult to guarantee the end-to-end Quality of Service (QoS) requirements

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