Method and system for realizing multilevel switching network global timing signal synchronization and switching network equipment

Abstract

The invention discloses a method and a system for realizing multilevel switching network global timing signal synchronization and switching network equipment. The method comprises the following steps: receiving a synchronous cell sent by global timing signal dispensing equipment; sending the synchronous cell to flow management equipment through a link between equipment and synchronizing the flow management equipment. The invention has the following advantages that the global timing signal synchronization operation of a whole switching network is triggered by the global timing signal dispensing equipment in the embodiment of the invention, the synchronous cell is sent to the flow management equipment in a multilevel switching network through the link between the equipment, and the link between the equipment is constructed when the multilevel switching network is established, therefore, the technical scheme cannot add the design cost of the multilevel switching network.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a multi-plane switching network global time scale synchronization method and system, and switching network equipment. Background technique [0002] A multi-plane switching network can be used to build a large switching network. figure 1 The shown multi-plane switching network includes K planes, and each plane is composed of three-level switching units S1, S2 and S3, wherein the switching units S1 and S3 can be implemented in the same switching network device. [0003] Such as figure 1 As shown, the cells sent by the traffic management device (Traffic Manager, TM) can reach the destination outlet through multiple optional paths, which leads to the cells belonging to the same flow, that is, the cells from the same input port to the same destination port Cells will be out of order when they arrive at the destination port. [0004] In order to keep the cells in the same ord...

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Problems solved by technology

[0008] In the existing multi-plane switching network global time stamp synchronization method, the time stamp source needs to establish a dedicated path for transmitting time stamp information with each TM. Since there are a large number of TMs in a large multi-plane switching network, the establishment of a dedicated path makes many The design cost of the flat switching network is very high, and since the dedicated channel can only be used to transmit the time stamp information, it will cause a great waste of resources

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