Data transmission apparatus and method for supporting multi-channel data transmission
A data transmission device and channel data technology, which is applied in the field of network communication, can solve problems such as head-of-line congestion and reading data, and achieve the effects of reducing design costs, expanding the number of channels, and avoiding head-of-line blocking phenomena
Active Publication Date: 2010-02-17
NEW H3C TECH CO LTD
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Problems solved by technology
In this design mode, when the data channel corresponding to a certain logical channel is blocked so that it cannot read data from the shared FIFO buffer, other logical channels that share the FIFO buffer with it will not be able to read data from the shared FIFO buffer. The data is read from the FIFO buffer, that is, the queue head is blocked
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[0052] As mentioned above, the present invention provides a data transmission device supporting multi-channel data transmission, and a corresponding data transmission method using the data transmission device. The technical solution of the present invention will be described in detail below with reference to the accompanying drawings.
[0053] first, figure 2 A schematic structural diagram of the first embodiment of the data transmission device interconnecting the sending device and the receiving device provided by the present invention is given.
[0054] It should be noted that, in figure 2 The sending device is specifically referred to as a link layer device 100, and the receiving device is specifically referred to as a physical layer device 300; that is, for the sake of simplification of description, figure 2 Only one-way data transmission sent by the link layer device 100 and received by the physical layer device 300 is shown. However, those skilled in the art should ...
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A data transmission device which supports the multi-channel data transmission comprises a multi-channel interface which proceeds the data transmission between the sending equipment and the receiving equipment, a sending side sustained storage, a receiving side sustained storage and a sending unit. The sending equipment and the multi-channel interface are connected with the sending side sustained storage, which puts the output data from the sending equipment into the sending side sustained storage according to the channel and sends the data in the sending side sustained storage to the multi-channel interface according to the flow control dispatching information of each channel. The receiving unit is connected with the multi-channel interface, the receiving side sustained storage and the receiving equipment, which puts the output data from the multi-channel interface into the receiving side sustained storage to wait to be transmitted into the receiving equipment and produces the corresponding flow control information based on the sustained storage data capacity of each channel in the receiving side sustained storage. The present invention also comprises the corresponding method of the data transmission of the data transmission device. By using the out sustained storage the present invention efficiently extendeds the quantity of the channel which is supported by the multi-channelinterface such as the SPI4.2 and avoids the phenomena of the team joint block.
Description
technical field [0001] The present invention relates to network communication, and in particular to data transmission between communication devices; more specifically, the present invention relates to flow control technology and data transmission technology enabling multi-channel data transmission between communication devices through external cache. Background technique [0002] SPI (System Packet Interface, System Packet Interface) is a point-to-point interface standard for interconnecting physical layer (Physical layer, PHY) devices and link layer (Link layer, LINK) devices developed by OIF (Optical Internetworking Forum, Optical Internet Forum). For different application environments, the SPI corresponds to multiple different versions, and currently the most widely used are SPI3 (SPI Level 3) and SPI4.2 (SPI Level 4 Phase 2); where the signal frequency of SPI3 is 2.5 Gbps, while SPI4.2 corresponds to a data transfer rate of 10Gbps. More specifically, SPI4.2 can be used ...
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IPC IPC(8): H04L12/56H04L29/08H04L29/10H04L12/803
Inventor 王昕
Owner NEW H3C TECH CO LTD