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EP-3806391-B1 - SYNCHRONIZATION INFORMATION TRANSMISSION METHOD, SENDING END DEVICE, RECEIVING END DEVICE AND STORAGE MEDIUM

EP3806391B1EP 3806391 B1EP3806391 B1EP 3806391B1EP-3806391-B1

Inventors

  • HAN, LIUYAN

Dates

Publication Date
20260506
Application Date
20190604

Claims (15)

  1. A synchronization information transmission method, performed by a sending end device, the method comprising: switching (402) synchronization information to a second PHY link for transmission when it is detected (401) that a first physical layer PHY link used for transmitting the synchronization information fails, the second PHY link being a PHY link other than the first PHY link in a FlexE group; wherein the FlexE group exists between the sending end device and a receiving end device; the FlexE group comprises at least two PHY links; wherein the method further comprises: receiving, through a PHY link corresponding to the second PHY link, synchronization information sent by the receiving end device.
  2. The synchronization information transmission method according to claim 1, wherein, when switching (402) the synchronization information to the second PHY link for transmission, the method further comprises: setting a first identifier in an overhead corresponding to the second PHY link, the first identifier being used to indicate that the synchronization information is transmitted via the second PHY link; and/or, selecting a PHY link from the FlexE group as the second PHY link according to a link switching rule.
  3. The synchronization information transmission method according to claim 1, further comprising: restoring the synchronization information to the first PHY link for transmission when it is detected that the first PHY link returns to normal.
  4. The synchronization information transmission method according to claim 1, wherein that it is detected (401) that a first physical layer PHY link used for transmitting the synchronization information fails comprises: a fault on the first PHY link is detected; or failure information of the first PHY link, sent by the receiving end device, is received.
  5. The synchronization information transmission method according to claim 2, wherein the selecting the PHY link from the FlexE group as the second PHY link according to the link switching rule comprises: selecting a corresponding PHY link as the second PHY link according to a numbering sequence of PHY links in the FlexE group.
  6. A synchronization information transmission method, performed by a receiving end device, the method comprising: receiving (503), through a second PHY link, synchronization information sent by a sending end device, the synchronization information received through the second PHY link being sent by the sending end device when it is detected that a first PHY link used for transmitting the synchronization information fails, and the second PHY link being a PHY link other than the first PHY link in a FlexE group; wherein the FlexE group exists between the sending end device and the receiving end device; the FlexE group comprises at least two PHY links; wherein the method further comprises: sending synchronization information to the sending end device through a PHY link corresponding to the second PHY link.
  7. The synchronization information transmission method according to claim 6, further comprising: parsing an overhead corresponding to the second PHY link to obtain a first identifier; and determining, based on the first identifier, that the synchronization information is transmitted via the second PHY link; and/or, receiving, through a first PHY link, synchronization information sent by the sending end device, the synchronization information received through the first PHY link being sent by the sending end device when it is detected that the first PHY link returns to normal.
  8. The synchronization information transmission method according to claim 6, further comprising: tracking a port of the FlexE group within a time period from when it is detected that the first PHY link fails to when the synchronization information is switched to the second PHY link for transmission; or, prioritizing the tracking of the port of the FlexE group within a time period from when it is detected that the first PHY link fails to when the synchronization information is switched to the second PHY link for transmission in a case that there is a link between the sending end device and the receiving end device other than the FlexE group path.
  9. The synchronization information transmission method according to claim 8, wherein the prioritizing the tracking of the port of the FlexE group comprises: prioritizing the tracking of the port of the FlexE group by setting a wait delay duration; or prioritizing the tracking of the port of the FlexE group by setting a link priority.
  10. The synchronization information transmission method according to claim 6, further comprising: sending failure information of the first PHY link to the sending end device when a fault on the first PHY link is detected.
  11. A sending end device (80), comprising: a first processor (82); a first communication interface (81), configured to switch the synchronization information to a second PHY link for transmission under control of the first processor (82) when it is detected that a first PHY link used for transmitting the synchronization information fails, the second PHY link being a PHY link other than the first PHY link in the FlexE group; wherein the FlexE group exists between the sending end device and the receiving end device; the FlexE group comprises at least two PHY links; wherein the first communication interface (81) is further configured to receive, through a PHY link corresponding to the second PHY link, synchronization information sent by the receiving end device.
  12. The sending end device (80) according to claim 11, wherein the first processor (82) is configured to set a first identifier in an overhead corresponding to the second PHY link; the first identifier is used to indicate that the synchronization information is transmitted via the second PHY link; and/or, the first processor (82) is configured to select a PHY link from the FlexE group as the second PHY link according to a link switching rule.
  13. A receiving end device (90), comprising a second processor (92); a second communication interface (91), configured to, under control of the second processor (92), receive, through a second PHY link, synchronization information sent by a sending end device; the synchronization information received through the second PHY link being sent by the sending end device when it is detected that a first PHY link used for transmitting the synchronization information fails, and the second PHY link being a PHY link other than the first PHY link in a FlexE group; wherein the FlexE group exists between the sending end device and the receiving end device; the FlexE group comprises at least two PHY links; wherein the second communication interface (91) is further configured to transmit synchronization information to the sending end device through a PHY link corresponding to the second PHY link.
  14. The receiving end device (90) according to claim 13, wherein the second processor (92) is configured to: parse an overhead corresponding to the second PHY link to obtain a first identifier; and determine, based on the first identifier, that the synchronization information is transmitted via the second PHY link.
  15. The receiving end device (90) according to claim 13, wherein the second communication interface (91) is further configured to receive, through the first PHY link, synchronization information sent by the sending end device; the synchronization information received through the first PHY link is sent by the sending end device when it is detected that the first PHY link returns to normal; and/or, the second communication interface (91) is further configured to send failure information of the first PHY link to the sending end device when a fault on the first PHY link is detected.

Description

TECHNICAL FIELD The present disclosure relates to the field of information transmission, in particular to a synchronization information transmission method, a sending end device, a receiving end device and a storage medium. BACKGROUND The services of mobile communication systems and systems in financial and power sectors all require synchronization between nodes. Synchronization includes frequency synchronization and time synchronization. According to the requirement of bandwidth transmission in the 5G era, the Flex Ethernet (FlexE) technology is proposed based on the Ethernet technology in the related art. FlexE is a lightweight Ethernet-based enhancement that enables decoupling of the Ethernet medium access control (MAC) layer rate and the Ethernet physical (PHY) layer rate. In the basic architecture of FlexE, a FlexE group composed of multiple PHY links may be used to transmit synchronization information. However, there is no effective solution in the related art concerning how to efficiently transmit synchronization information using the PHY link of FlexE group. Document CN 107 888 345 A, describes an opposite end receiving aFlexE protocol overhead frame transmitted by a local end, the opposite end extracting bit error state information acquired by the local end. the bit error information of both ends is reported and the physical channel with bit errors is removed from a bundle group or replaced with a backup physical channel. by an automatic switching function. SUMMARY In order to solve the technical problems in the related art, embodiments of the present disclosure provide a synchronization information transmission method, a sending end device, a receiving end device. The invention is set out in the appended set of claims. According to the synchronization information transmission method, the sending end device, the receiving end device and the storage medium provided by the embodiments of the present disclosure, when the failure of a first PHY link used for transmitting synchronization information is detected, the sending end device switches the synchronization information to a second PHY link for transmission; the receiving end device receives, through the second PHY link, the synchronization information sent by the sending end device; the second PHY link is a PHY link other than the first PHY link in the FlexE group; the FlexE group exists between the sending end device and the receiving end device; the FlexE group includes at least two PHY links; and when the PHY link used for transmitting the synchronization information fails, since the synchronization information is switched to other PHY link in the FlexE group for transmission, the synchronization of the sending end device and the receiving end device can be kept; moreover, the synchronization tracking relationships among nodes other than the sending end device and the receiving end device will not be changed by the switching process, so that the influence on a synchronization network is reduced to the maximum extent, and the influence on the network is reduced. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram of a FlexE architecture according to an embodiment of the present disclosure;FIG. 2 is a schematic diagram illustrating a case in which a PHY link in a FlexE group fails according to an embodiment of the present disclosure;FIG. 3 is a schematic diagram illustrating a change in synchronization tracking relationships due to a failure of a link in a FlexE group according to an embodiment of the present disclosure;FIG. 4 is a flow diagram of a synchronization information transmission method for a sending end device according to an embodiment of the present disclosure;FIG. 5 is a flow diagram of a synchronization information transmission method according to an embodiment of the present disclosure;FIG. 6 is a schematic diagram of a structure of a synchronization information transmission device provided on a sending end device according to an embodiment of the present disclosure;FIG. 7 is a schematic diagram of a structure of a synchronization information transmission device provided on a receiving end device according to an embodiment of the present disclosure;FIG. 8 is a schematic diagram of a structure of a sending end device according to an embodiment of the present disclosure;FIG. 9 is a schematic diagram of a structure of a receiving end device according to an embodiment of the present disclosure;FIG. 10 is a schematic diagram of a structure of a synchronization information transmission system according to an embodiment of the present disclosure. DETAILED DESCRIPTION The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be noted that the terms "first", "second", and the like herein are used for distinguishing between similar objects and are not necessarily for describing a particular order or precedence. Before describing embodiments of the presen