Message synchronization method, apparatus and system

• US 9,143,584 B2
• Filed: 01/30/2012
• Issued: 09/22/2015
• Est. Priority Date: 07/30/2009
• Status: Active Grant

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: Jiang, Bing, Zhang, Yihua, Qi, Kai
• Primary Examiner(s): Torres, Joseph D
• Application Number:
  US13/361,457
• Publication Number:
  US 20120131378A1
• Time in Patent Office: 1,331 Days
• US Class Current: 1/1
• CPC Class Codes: H04L 69/14 Multichannel or multilink protocols
• CPC Class Codes: H04L 69/28 Timers or timing mechanisms used in protocols

Abstract

Embodiments of the present invention relate to a message synchronization method, apparatus and system. The method includes: obtaining a first sending time stamp transmitted on a main link and a second sending time stamp transmitted on a backup link respectively; calculating to obtain a time difference according to the first sending time stamp and the second sending time stamp; adding bytes to the first message transmitted on the main link and the first message transmitted on the backup link, and form second messages to be transmitted on the main link and the backup link respectively; and sending the second messages to a receiving end on the main link and the backup link respectively.

Claims

1. A message synchronization method, comprising:

obtaining a first sending time stamp of a first message transmitted on a main link, and obtaining a second sending time stamp of a first message transmitted on a backup link;

calculating a time difference between the first sending time stamp and the second sending time stamp according to the first sending time stamp and the second sending time stamp;

adding bytes in the first message transmitted on the main link and the first message transmitted on the backup link, setting the time difference in the types, and forming a second message to be transmitted on the main link and a second message to be transmitted on the backup link respectively; and

sending the second messages to a receiving end respectively on the main link and the backup link, so that when errors occur in the second message transmitted on the main link, the receiving end modifies a second receiving time stamp on the backup link according to the time difference in the second message transmitted on the backup link, and removes the added byte to obtain the first message.

2. The method according to claim 1, wherein the first message is a 1588V2 message.

3. The method according to claim 1, wherein the calculating the time difference between the first sending time stamp and the second sending time stamp according to the first sending time stamp and the second sending time stamp comprises:

calculating a difference between the first sending time stamp and the second sending time stamp, and using the difference as the time difference.

4. The method according to claim 1, wherein the sending the second message to the receiving end respectively on the main link and the backup link, so that when errors occur in the second message transmitted on the main link, the receiving end modifies the second receiving time stamp on the backup link according to the time difference in the second message transmitted on the backup link, and removes the added byte to obtain the first message comprises:

adding fields to form the bytes in tails of the first message transmitted on the main link and the first message transmitted on the backup link, setting the time difference in the bytes, and forming the second message to be transmitted on the main link and the second message to be transmitted on the backup link respectively.

5. A message synchronization method, comprising:

receiving a second message transmitted on a main link, and receiving a second message transmitted on a backup link, wherein the second message transmitted on the main link and the second message transmitted on the backup link both have a byte for setting a time difference, and the time difference is a difference between a second sending time stamp when a sending end sends the second message on the backup link and a first sending time stamp when the sending end sends the second message on the main link;

obtaining a first receiving time stamp when receiving the second message transmitted on the main link, and obtaining a second receiving time stamp when receiving the second message transmitted on the backup link; and

performing selection on the second message transmitted on the main link and the second message transmitted on the backup link, and if errors occur in the second message transmitted on the main link, selecting the second message transmitted on the backup link, modifying the second receiving time stamp on the backup link according to the time difference in the second message, and removing the added byte set with the time difference from the selected second message to obtain a first message.

6. The method according to claim 5, further comprising:

if no error occurs in the second message transmitted on the main link, selecting the second message transmitted on the main link, removing the byte set with the time difference from the second message transmitted on the main link, so as to obtain the first message.

7. A message synchronization apparatus, comprising:

a obtaining module, configured to obtain a first sending time stamp of a first message transmitted on a main link, and obtain a second sending time stamp of a first message transmitted on a backup link;

a calculating module, configured to calculate a time difference between the first sending time stamp and the second sending time stamp according to the first sending time stamp and the second sending time stamp;

a setting module, configured to add bytes in the first message transmitted on the main link and the first message transmitted on the backup link, set the time difference in the bytes, and form a second message to be transmitted on the main link and a second message to be transmitted on the backup link respectively; and

a sending module, configured to send the second messages to a receiving end respectively on the main link and the backup link, so that when errors occur in the second message transmitted on the main link, the receiving end selects the second message transmitted on the backup link, modifies a second receiving time stamp on the backup link according to the time difference in the second message, and removes the added byte from the selected second message to obtain the first message.

8. The apparatus according to claim 7, wherein the setting module comprises:

an adding unit, configured to add fields to form the bytes in tails of the first message transmitted on the main link and the first message transmitted on the backup link; and

a setting unit, configured to set the time difference in the bytes, and form the second message to be transmitted on the main link and the second message to be transmitted on the backup link respectively.

9. A message synchronization apparatus, comprising:

a receiving module, configured to receive a second message transmitted on a main link, and receive a second message transmitted on a backup link, wherein the second message transmitted on the main link and the second message transmitted on the backup link both have a byte for setting a time difference, and the time difference is a difference between a second sending time stamp when a sending end sends the second message on the backup link and a first sending time stamp when the sending end sends the second message on the main link;

an obtaining module, configured to obtain a first receiving time stamp when receiving the second message transmitted on the main link, and obtain a second receiving time stamp when receiving the second message transmitted on the backup link; and

a selecting module, configured to perform selection on the second message transmitted on the main link and the second message transmitted on the backup link, and if errors occur in the second message transmitted on the main link, select the second message transmitted on the backup link, modify the second receiving time stamp on the backup link according to the time difference in the second message, and remove the added byte from the selected second message to obtain a first message.

10. A message synchronization system, comprising:

a sending end and a receiving end, wherein

the sending end is configured to obtain a first sending time stamp of a first message transmitted on a main link, and obtain a second sending time stamp of a first message transmitted on a backup link;

calculate a time difference between the first sending time stamp and the second sending time stamp according to the first sending time stamp and the second sending time stamp;

add bytes in the first message transmitted on the main link and the first message transmitted on the backup link, set the time difference in the bytes, and form a second message to be transmitted on the main link and a second message to be transmitted on the backup link respectively; and

send the second messages to the receiving end respectively on the main link and the backup link; and

the receiving end is configured to receive the second message transmitted on the main link, and receive the second message transmitted on the backup link;

obtain a first receiving time stamp of the second message transmitted on the main link, and obtain a second receiving time stamp of the second message transmitted on the backup link;

perform selection on the second message transmitted on the main link and the second message transmitted on the backup link, if errors occur in the second message transmitted on the main link, select the second message transmitted on the backup link, modify the second receiving time stamp on the backup link according to the time difference in the second message, and remove the added byte from the selected second message to obtain the first message.