Method and apparatus for delay jitter elimination during message transmission process

Abstract

The embodiment of the invention provides a method and apparatus for delay jitter elimination during a message transmission process. The method comprises the following steps that: before stamp taking is carried out on a target message, the bit of the target message is increased and the length of the target message is adjusted , so that the length of the target message reaches a preset one; stamp taking is carried out on the target message at a stamp taking point so as to obtain a first timestamp of the target message; whether an indication code of the target message is received is detected at the stamp taking point; if no indication code is detected, a current counting value of a first counter is obtained and is used as a target bit number, wherein a bit number is subtracted from the first counter after one work cycle each time and is also one going out of a stack outgoing point in the work cycle; and according to the target bit number and the first timestamp, a second timestamp at the stack outgoing point at current moment is obtained. According to the invention, the length of the target message is adjusted before stamp taking and the to-be-transmitted bit number in a protocol stack is measured by the counter, thereby realizing delay jitter correction and eliminating the delay jitter during the transmission.

Description

technical field [0001] The invention relates to communication technology, in particular to a method and device for eliminating delay and jitter during message transmission. Background technique [0002] The Precise Time Protocol (PTP) is a packet-based clock synchronization protocol, which is used to implement frequency synchronization and time synchronization between devices. figure 1 It is the process of PIP packets entering and exiting the protocol stack. Such as figure 1 As shown, in the PTP protocol, time stamps are performed on the PTP message to record the time points when the PTP message enters the protocol stack and exits the protocol stack. [0003] In the current network environment, PTP packets need to be carried on the underlying protocol. When the PTP message enters the protocol stack, it needs to be processed by the underlying protocol from the point of entry to the point of obtaining the time stamp. Correspondingly, when it is out of the protocol stack, it...

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Problems solved by technology

[0007] The above two methods of obtaining delay jitter data require that the circuit must be simple, and cannot analyze more complex circuits, which has limitations

Moreover, through the above two methods, the delay jitter obtained is not accurate enough, so that there is a certain error in the transmission delay obtained by using the delay jitter

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