Clock synchronization processing method
A clock synchronization and processing method technology, applied in the field of computer communication, can solve the problem that the switching network cannot realize clock synchronization, etc., and achieve the effects of easy implementation, flexible connection and simple control
Inactive Publication Date: 2013-05-01
AVIC NO 631 RES INST
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[0004] The purpose of the present invention is to provide a clock synchronization processing method to solve the problem that the switching network cannot realize clock synchronization when multiple clock servers are connected to the switching network
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[0017] The implementation manner will be described in detail below in conjunction with the accompanying drawings.
[0018] First, the switch clock synchronization processing circuit is introduced, such as figure 1 As shown: Among them, input terminal 0 ~ input terminal n are the input terminals of switch port 0 ~ port n, which are respectively used to receive the data frame and clock synchronization signal sent by the connected node machine; output terminal 0 ~ output terminal n are switches The output terminals of port 0~port n are respectively used to send data frames and clock synchronization signals to the connected node machines; the input terminals of each port have three registers: register A[i], indicating whether the port i has received Clock synchronization signal, after receiving the clock synchronization signal for the first time, this register is set high, and it has been kept; register B[i] indicates whether the port i receives the clock synchronization signal is...
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The invention provides a clock synchronization processing method, which solves the problem that when a plurality of clock servers are connected into exchange networks, the exchange network cannot realize the clock synchronization. The clock synchronization processing method comprises the following links that an switchboard is provided with each port receiving clock synchronization enabling register; when a plurality of clock servers are connected into exchange networks, i.e. a plurality of ports of the switchboard receive the clock synchronization signals, the corresponding interruption is generated, and the condition is reported to a CPU (central processing unit); each port receiving clock synchronization enabling register is set through the CPU, and the corresponding ports are forbidden receiving the clock synchronization signals, so that only one port receives the clock synchronization signals can be ensured; and the port receiving the clock synchronization signal sends the clock synchronization signals to all of the rest ports. When the processing method provided by the invention is adopted, when a plurality of clock servers are connected to the switchboard, the fault-tolerance processing can be carried out, the clock synchronization on the whole exchange network can still be realized, the control is simple, and the realization is easy.
Description
Technical field: [0001] The invention belongs to the computer communication technology, and relates to a clock synchronization processing method of a switch in a communication network. Background technique: [0002] A modern switched communication network consists of node machines and switches. All node machines are connected to switches through links to realize distributed communication. In a strong real-time switching network, in order to realize the clock synchronization of the entire network, generally one node machine is used as a clock server, and other node machines are used as clock clients. The clock server sends a clock synchronization signal carrying time information to the switch regularly, and then the switch This is achieved by sending a clock synchronization signal to the clock client. When all clients are synchronized with the server, they are also synchronized with each other. [0003] In practical applications, users may mistakenly connect two or more clo...
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IPC IPC(8): H04J3/06H04L12/931
Inventor 李玉发李大鹏王晓华张利洲
Owner AVIC NO 631 RES INST