WAN interface based 1588V2 packet transmission method and apparatus

Patent metadata

Field	Value
Publication number	US-9985737-B2
Application number	US-201615142050-A
Country	US
Kind code	B2
Filing date	Apr 29, 2016
Priority date	Oct 31, 2013
Publication date	May 29, 2018
Grant date	May 29, 2018

Abstract

Embodiments of the present invention disclose a WAN interface based 1588V2 packet transmission method and apparatus, which relate to the field of communications technologies and can reduce complexity of 1588V2 packet transmission. The method includes: first, inserting, by a sending end, a 1588V2 packet into a payload area of a data frame, and sending, to a receiving end, the data frame carrying the 1588V2 packet; then, receiving, by the receiving end, the data frame that is sent by the sending end and carries the 1588V2 packet, and acquiring a receiving time at which the data frame is received; and finally, performing, by the receiving end, time synchronization adjustment on the receiving time. The embodiments of the present invention are applicable to 1588V2 packet transmission between networks.

First claim

What is claimed is:

1. A wide area network (WAN) interface based 1588V2 packet transmission method, comprising:
receiving, by a receiving end, a data frame that is sent by a sending end and carries a 1588V2 packet;
acquiring, by the receiving end, a receiving time at which the data frame is received;
performing, by the receiving end, time synchronization adjustment on the receiving time; wherein
before performing, by the receiving end, time synchronization adjustment on the receiving time, the method further comprises:
configuring, by the receiving end, a synchronous counter separately for a wide area network interface sublayer (WIS) and a media access control (MAC) sublayer;
when the data frame carrying the 1588V2 packet is transmitted to the WIS, acquiring, by the receiving end, a first count value corresponding to the WIS; and
when the data frame carrying the 1588V2 packet is transmitted to the MAC sublayer, acquiring, by the receiving end, a second count value corresponding to the MAC sublayer; and

performing, by the receiving end, time synchronization adjustment on the receiving time comprises:
performing, by the receiving end, the time synchronization adjustment on the receiving time according to a count difference between the first count value and the second count value, wherein the receiving time is a corresponding time at which the data frame carrying the 1588V2 packet is transmitted to the MAC sublayer.

2. The method according to claim 1 , wherein:
before performing, by the receiving end, the time synchronization adjustment on the receiving time according to a count difference between the first count value and the second count value, the method further comprises:
acquiring, by the receiving end, the count difference between the first count value and the second count value; and

performing, by the receiving end, the time synchronization adjustment on the receiving time according to a count difference between the first count value and the second count value comprises:
acquiring, by the receiving end, a time difference corresponding to the count difference, and
performing, by the receiving end, the time synchronization adjustment on the receiving time according to the time difference.

3. A wide area network (WAN) interface based 1588V2 packet transmission apparatus, comprising:
a processor; and
a non-transitory storage memory storing instructions that, when executed by the processor, cause the apparatus to:
receive a data frame that is sent by a sending end and carries a 1588V2 packet,
acquire a receiving time when the data frame is received,
configure a synchronous counter separately for a wide area network interface sublayer (WIS) and a media access control (MAC) sublayer,
when the data frame carrying the 1588V2 packet is transmitted to the WIS, acquire a first count value that is corresponding to the WIS,
when the data frame carrying the 1588V2 packet is transmitted to the MAC sublayer, acquire a second count value that is corresponding to the MAC sublayer, and
perform time synchronization adjustment on the receiving time according to a count difference between the first count value and the second count value, wherein the receiving time is a corresponding time at which the data frame carrying the 1588V2 packet is transmitted to the MAC sublayer.

4. The apparatus according to claim 3 , wherein the instructions, when executed by the processor, further cause the apparatus to:
acquire the count difference between the first count value and the second count value;
acquire a time difference corresponding to the count difference, and
perform the time synchronization adjustment on the receiving time according to the time difference.

Assignees

• Huawei Tech Co Ltd

Inventors

• Chen Liqing
• Lin Tao

Classifications

• H04J3/0667 Primary

  Bidirectional timestamps, e.g. NTP or PTP for compensation of clock drift and for compensation of propagation delays (arrangements for monitoring round trip delays in packet switching networks H04L43/0864) · CPC title

• H04L61/6022

  Electricity · mapped topic

• H04L12/2854

  Wide area networks, e.g. public data networks · CPC title

• H04L29/12575

  Electricity · mapped topic

• H04L45/745

  Address table lookup; Address filtering · CPC title