Data communication method for device interior
A technology of data communication and communication method, which is applied in the field of Ethernet frame format data communication, can solve the problems of unfavorable interface for ordinary processor connection, many physical layer devices, and large space occupation, so as to simplify the physical layer circuit, simplify the topology structure, The effect of reducing complexity
Active Publication Date: 2008-06-04
SHANGHAI MUNICIPAL ELECTRIC POWER CO
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Problems solved by technology
[0007] The purpose of the present invention is in order to overcome the standard Ethernet technology physical layer configuration requirement too much in the prior art, the interface of physical layer and MAC (media access controller) layer is unfavorable for the shortcoming that is connected with common processor, solves the problem in the prior art There are too many physical layer devices, taking up a lot of space, and there are multiple communication structures in the whole device, so a data communication method inside the device is proposed
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[0024] figure 1 It is the overall communication topology structure, each functional unit and the Ethernet switching unit form a star network, and the Ethernet switching unit is the center.
[0025] figure 2 It is a bus interface type communication interface circuit. This circuit model is suitable for units that do not have a standard MII interface for the processor, or the number of MII interfaces is not enough but the Ethernet interface needs to be expanded. This interface, the processor is compatible with the Ethernet The sending and receiving of data frames is accomplished through the read and write access of the bus.
[0026] image 3 It is a MII interface type communication interface circuit, and this circuit model is suitable for units with standard MII interface for that kind of processor. In this interface, the processor sends and receives Ethernet data frames through communication with the internal communication processor.
[0027] See attached figure 2 The bus...
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The invention discloses a inner data communicating method of device which provides different communicating interface circuit connection between the function unit and the exchanging center unit; when the processor of the function unit doesn't have the standard Ethernet MII interface, it provides the function unit which uses the bus interface type communicating interface circuit to connect with the exchanging center unit; when the processor of the function unit has the standard Ethernet MII interface, it provides the function unit which uses the MII interface type communicating interface circuit to connect with the exchanging center unit; it uses the low pressure differential signal transferring to send and receive the signal between the function unit and the exchanging center unit.
Description
technical field [0001] The invention relates to the field of Ethernet frame format data communication, in particular to a communication method between various functional units in a rack of complex system equipment. Background technique [0002] Since the formal adoption of the 10BASE-T standard in 1990, Ethernet technology has been greatly improved due to its openness, simple structure, concise algorithm, good compatibility and smooth upgrade function, and the transmission bandwidth has also been greatly improved over time. The domain of the local area network has achieved a dominant position, and its territory has also expanded to the range of the metropolitan area network and the wide area network. Among them, because the total transmission bandwidth of switched Ethernet products is dozens of times that of a single port, and there is no media contention problem between ports, the overall performance is more prominent in heavy-load applications. [0003] In complex equipme...
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IPC IPC(8): H04L12/44
Inventor 刘友义杨源新
Owner SHANGHAI MUNICIPAL ELECTRIC POWER CO