WO2018041228A1 - 一种传输同步信息的方法、装置和系统 - Google Patents
一种传输同步信息的方法、装置和系统 Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/0635—Clock or time synchronisation in a network
- H04J3/0638—Clock or time synchronisation among nodes; Internode synchronisation
- H04J3/0658—Clock or time synchronisation among packet nodes
- H04J3/0661—Clock or time synchronisation among packet nodes using timestamps
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L7/00—Arrangements for synchronising receiver with transmitter
- H04L7/0008—Synchronisation information channels, e.g. clock distribution lines
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/0635—Clock or time synchronisation in a network
- H04J3/0638—Clock or time synchronisation among nodes; Internode synchronisation
- H04J3/0647—Synchronisation among TDM nodes
- H04J3/065—Synchronisation among TDM nodes using timestamps
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/16—Time-division multiplex systems in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted
- H04J3/1605—Fixed allocated frame structures
- H04J3/1652—Optical Transport Network [OTN]
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/16—Time-division multiplex systems in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted
- H04J3/1605—Fixed allocated frame structures
- H04J3/1652—Optical Transport Network [OTN]
- H04J3/1658—Optical Transport Network [OTN] carrying packets or ATM cells
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- H04L7/00—Arrangements for synchronising receiver with transmitter
- H04L7/0054—Detection of the synchronisation error by features other than the received signal transition
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L7/00—Arrangements for synchronising receiver with transmitter
- H04L7/0075—Arrangements for synchronising receiver with transmitter with photonic or optical means
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J2203/00—Aspects of optical multiplex systems other than those covered by H04J14/05 and H04J14/07
- H04J2203/0001—Provisions for broadband connections in integrated services digital network using frames of the Optical Transport Network [OTN] or using synchronous transfer mode [STM], e.g. SONET, SDH
- H04J2203/0073—Services, e.g. multimedia, GOS, QOS
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- H04J3/0667—Bidirectional timestamps, e.g. NTP or PTP for compensation of clock drift and for compensation of propagation delays
Definitions
- This document relates to, but is not limited to, wired communication technologies, and more particularly to a method, apparatus and system for transmitting synchronization information.
- FlexE (Flexible Ethernet) technology was initiated by the International Organization for Standardization (ISO) Optical Internetworking Forum (OIF) in March 2015 and officially voted through the relevant technical documents in March 2016.
- the general structure of flexible Ethernet is shown in Figure 1.
- One of the features of flexible Ethernet is to bind multiple Ethernet PHYs with the same rate to transmit services with large MAC addresses, such as binding four 100G Ethernet physical layer (PHY, PHY) layer channels to support media access control (MAC, Media Access Control)
- PHY physical layer
- MAC Media Access Control
- flexible Ethernet has a layer (FlexE Shim) between the MAC layer and the Physical Coding Sublayer (PCS).
- the function of the layer is to build a A calendar of size 20 x n length 66 bytes (66b blocks), where n is the number of bonded Ethernet PHYs, and each 66 byte block represents a 5G time slot.
- each 20 66b blocks constitute a sub-calendar sub-Calendar, and a size of 20 ⁇ n is distributed to n sub-Calendars.
- an overhead of 66b blocks is added for every 20 ⁇ 1023 66b blocks to store the relevant mapping relationship, and each sub-Calendar is transmitted in a single 100G Ethernet PHY.
- n sub-Calendars can form a calendar of size 20 ⁇ n, and corresponding customer services are extracted from the corresponding number of 66b blocks according to the mapping relationship stored in the overhead.
- Embodiments of the present invention are directed to a method, apparatus, and system for transmitting synchronization information to enable transmission of synchronization information over a flexible Ethernet.
- an embodiment of the present invention provides a method for transmitting synchronization information, where the method includes:
- the sender selects at least one Ethernet physical layer link PHY for transmitting synchronization information from the flexible Ethernet group FlexE group;
- the sending end encapsulates the synchronization information according to a preset encapsulation policy, and inserts the synchronization information storage area in the selected Ethernet PHY overhead;
- the transmitting end sends the synchronization information through the selected Ethernet PHY.
- the method further includes:
- the sending end sets a synchronization flag in the selected Ethernet PHY overhead; wherein the synchronization flag is used to indicate that the synchronization information is carried in the Ethernet PHY where the synchronization mark is located;
- the method further includes:
- the transmitting end sends the synchronization mark through the selected Ethernet PHY.
- the method further includes:
- the transmitting end divides at least one of a synchronization information storage area and a synchronization flag from a reserved byte in the FlexE overhead; wherein the synchronization flag is used to indicate the synchronization flag.
- the sending end divides at least one of a synchronization information storage area and a synchronization flag bit from the reserved bytes in the FlexE overhead, including:
- the transmitting end divides, from the reserved bytes of the FlexE overhead, a synchronization flag bit of a preset first byte length and a synchronization information storage area of a preset second byte length.
- the sending end seals the synchronization information according to a preset encapsulation policy.
- insert the synchronization information storage area in the selected Ethernet PHY overhead including:
- the transmitting end encapsulates the synchronization information according to a frame-based general framing procedure GFP-F;
- the transmitting end inserts the encapsulated synchronization information into a synchronization information storage area in the selected Ethernet PHY overhead.
- the synchronization information includes a precise time protocol PTP message.
- the generation period of the PTP packet meets the clock time synchronization requirement.
- the sending end sends the synchronization information by using the selected Ethernet PHY, including:
- an embodiment of the present invention provides a method for transmitting synchronization information, where the method includes:
- the sender selects at least one Ethernet physical layer link PHY for transmitting synchronization information from the flexible Ethernet group FlexE group;
- the transmitting end encapsulates the original synchronization information according to a preset encapsulation policy, and inserts the synchronization information storage area in the selected Ethernet PHY overhead;
- the OTN network egress end updates the original synchronization information according to the OTN network time difference, and obtains updated synchronization information
- the OTN network egress end encapsulates the updated synchronization information according to the preset encapsulation policy, and inserts the synchronization information storage area in the selected Ethernet PHY overhead;
- the OTN network egress end sends the updated same through the selected Ethernet PHY Step information.
- the method further includes:
- the sending end sets a synchronization flag in the selected Ethernet PHY overhead; wherein the synchronization flag is used to indicate that the synchronization information is carried in the Ethernet PHY where the synchronization mark is located;
- the OTN network egress end determines the selected Ethernet PHY, including: the OTN network egress end parses the synchronization flag of the Ethernet PHY to determine the selected Ethernet PHY;
- the method further includes: sending, by the OTN network egress end, the selected Ethernet PHY by using the selected Ethernet PHY Sync mark.
- the method further includes:
- the transmitting end divides at least one of a synchronization information storage area and a synchronization flag from a reserved byte in the FlexE overhead; wherein the synchronization flag is used to indicate the synchronization flag.
- the sending end encapsulates the synchronization information according to a preset encapsulation policy, and inserts the synchronization information storage area in the selected Ethernet PHY overhead, including:
- the transmitting end encapsulates the synchronization information according to a frame-based general framing procedure GFP-F;
- the transmitting end inserts the encapsulated synchronization information into a synchronization information storage area in the selected Ethernet PHY overhead.
- the synchronization information includes a precise time protocol PTP message.
- the generation period of the PTP packet meets the clock time synchronization requirement.
- an embodiment of the present invention provides a method for transmitting synchronization information, where the method includes:
- the sender selects at least one Ethernet physical layer link PHY for transmitting synchronization information from the flexible Ethernet group FlexE group;
- the transmitting end encapsulates the original synchronization information according to a preset encapsulation policy, and inserts the synchronization information storage area in the selected Ethernet PHY overhead;
- the OTN network egress end encapsulates the OTN network time difference according to the preset encapsulation policy, and inserts the management channel in the selected Ethernet PHY overhead;
- the OTN network egress end sends the original synchronization information and the OTN network time difference through the selected Ethernet PHY.
- the method further includes: the sending end setting a synchronization mark in the selected Ethernet PHY overhead; wherein the synchronization mark is used to indicate that the Ethernet PHY in which the synchronization mark is located carries Synchronization information;
- the OTN network egress end determines the selected Ethernet PHY, including: the OTN network egress end parses the synchronization flag of the Ethernet PHY to determine the selected Ethernet PHY;
- the method further includes: the OTN network egress end passes the selected Ethernet The PHY sends the synchronization flag.
- the method further includes: the transmitting end dividing at least one of a synchronization information storage area and a synchronization flag bit from a reserved byte in the FlexE overhead; wherein the synchronization flag bit is used to indicate the synchronization mark.
- the sending end encapsulates the synchronization information according to a preset encapsulation policy, and inserts the synchronization information storage area in the selected Ethernet PHY overhead, including:
- the transmitting end encapsulates the synchronization information according to a frame-based general framing procedure GFP-F;
- the transmitting end inserts the encapsulated synchronization information into a synchronization information storage area in the selected Ethernet PHY overhead.
- an embodiment of the present invention provides a method for transmitting synchronization information, where the method includes:
- the receiving end detects the Ethernet used to transmit the synchronization information from the flexible Ethernet group FlexE group Physical layer link PHY;
- the receiving end parses the encapsulated synchronization information from the synchronization information storage area in the Ethernet PHY overhead for transmitting synchronization information;
- the receiving end acquires the synchronization information from the encapsulated synchronization information by using a preset decapsulation policy
- the receiving end performs time synchronization according to the synchronization information.
- the Ethernet PHY overhead for transmitting the synchronization information further includes: a synchronization flag; wherein the synchronization flag is used to indicate that the synchronization information is carried in the Ethernet PHY where the synchronization tag is located.
- the receiving end detects an Ethernet physical layer link PHY for transmitting synchronization information from the flexible Ethernet group FlexE group, including:
- the receiving end determines the Ethernet PHY for transmitting synchronization information by detecting a synchronization flag in the Ethernet PHY from the FlexE group.
- the synchronization information includes a precise time protocol PTP message.
- the encapsulated synchronization information is synchronization information encapsulated according to the frame-based general framing procedure GFP-F;
- the receiving end obtains the original synchronization information from the encapsulated synchronization information by using a preset decapsulation policy, including:
- the receiving end decapsulates the encapsulated synchronization information according to GFP-F to obtain original synchronization information.
- an embodiment of the present invention provides a method for transmitting synchronization information, where the method includes:
- the receiving end detects an Ethernet physical layer link PHY for transmitting synchronization information from the flexible Ethernet group FlexE group;
- the receiving end acquires synchronization information updated by the egress end of the OTN network from the Ethernet PHY overhead for transmitting synchronization information;
- the receiving end performs the same time according to the synchronization information updated by the egress end of the OTN network. step.
- an embodiment of the present invention provides a method for transmitting synchronization information, where the method includes:
- the receiving end detects an Ethernet physical layer link PHY for transmitting synchronization information from the flexible Ethernet group FlexE group;
- the receiving end acquires original synchronization information and an OTN network time difference from the Ethernet PHY overhead for transmitting synchronization information;
- the receiving end performs time synchronization according to the original synchronization information and the OTN network time difference.
- an embodiment of the present invention provides a method for transmitting synchronization information, where the method includes:
- the sender selects at least one Ethernet physical layer link PHY for transmitting synchronization information from the flexible Ethernet group FlexE group;
- the sending end encapsulates the synchronization information according to a preset encapsulation policy, and inserts the synchronization information storage area in the selected Ethernet PHY overhead;
- the receiving end detects an Ethernet physical layer link PHY for transmitting synchronization information from a flexible Ethernet group FlexE group;
- the receiving end parses the encapsulated synchronization information from the synchronization information storage area in the Ethernet PHY overhead for transmitting synchronization information;
- the receiving end acquires the synchronization information from the encapsulated synchronization information by using a preset decapsulation policy
- the receiving end performs time synchronization according to the synchronization information.
- the embodiment of the present invention provides a first sending end, where the first sending end includes: a first selecting module, a first inserting module, and a first sending module;
- the first selection module is configured to select at least one Ethernet physical layer link PHY for transmitting synchronization information from the flexible Ethernet group FlexE group;
- the first insertion module is configured to seal the synchronization information according to a preset encapsulation policy. After installation, insert the synchronization information storage area in the selected Ethernet PHY overhead;
- the first sending module is configured to send the synchronization information by using the selected Ethernet PHY.
- the first sending end further includes a first setting module, configured to set a synchronization mark in the selected Ethernet PHY overhead; wherein the synchronization mark is used to indicate an ether of the synchronization mark
- the network PHY carries synchronization information.
- the first sending end further includes: a first dividing module, configured to divide at least one of a synchronization information storage area and a synchronization flag bit from the reserved bytes in the FlexE overhead; wherein the synchronization flag bit Used to mark the synchronization mark.
- the first insertion module is configured to encapsulate the synchronization information according to a frame-based general framing procedure GFP-F;
- the encapsulated synchronization information is inserted into the synchronization information storage area in the selected Ethernet PHY overhead.
- the embodiment of the present invention provides a second sending end, where the second sending end includes: a second selecting module, a second inserting module, a second sending module, and an OTN network egress end of the first optical transport network; among them,
- the second selection module is configured to select at least one Ethernet physical layer link PHY for transmitting synchronization information from the flexible Ethernet group FlexE group;
- the second insertion module is configured to encapsulate the original synchronization information according to a preset encapsulation policy, and insert the synchronization information storage area in the selected Ethernet PHY overhead;
- the second sending module is configured to send the original synchronization information to the egress end of the first OTN network by using the selected Ethernet PHY;
- the first OTN network egress end is configured to determine the selected Ethernet PHY
- the embodiment of the present invention provides a third sending end, where the third sending end includes: a third selecting module, a third inserting module, a third sending module, and an OTN network egress end of the second optical transport network; among them,
- the third selection module is configured to select at least one Ethernet physical layer link PHY for transmitting synchronization information from the flexible Ethernet group FlexE group;
- the third insertion module is configured to encapsulate the original synchronization information according to a preset encapsulation policy, and insert the synchronization information storage area in the selected Ethernet PHY overhead;
- the third sending module is configured to send the original synchronization information to the second OTN network egress end by using the selected Ethernet PHY;
- the second OTN network egress end is configured to determine the selected Ethernet PHY
- an embodiment of the present invention provides a first receiving end, where the first receiving end includes: a first detecting module, a first analyzing module, a first decapsulating module, and a first synchronization module;
- the first detecting module is configured to detect an Ethernet physical layer link PHY for transmitting synchronization information from a flexible Ethernet group FlexE group;
- the first parsing module is configured to parse the encapsulated synchronization information from the synchronization information storage area in the Ethernet PHY overhead for transmitting synchronization information;
- the first decapsulation module is configured to obtain the synchronization information from the encapsulated synchronization information by using a preset decapsulation policy
- the first synchronization module is configured to perform time synchronization according to the synchronization information.
- the Ethernet PHY overhead configured to transmit the synchronization information further includes: a synchronization flag; wherein the synchronization flag is used to indicate that the synchronization flag is in the Ethernet PHY Carrying synchronization information
- the first detection module is set to:
- the Ethernet PHY for transmitting synchronization information is determined from the FlexE group by detecting a synchronization flag in the Ethernet PHY.
- the encapsulated synchronization information is synchronization information encapsulated according to the frame-based general framing procedure GFP-F;
- the first decapsulation module is configured to:
- the encapsulated synchronization information is decapsulated according to GFP-F to obtain original synchronization information.
- the embodiment of the present invention provides a second receiving end, where the second receiving end includes: a second detecting module, a first acquiring module, and a second synchronization module;
- the second detecting module is configured to detect an Ethernet physical layer link PHY for transmitting synchronization information from a flexible Ethernet group FlexE group;
- the first obtaining module is configured to obtain synchronization information updated by the egress end of the OTN network from the Ethernet PHY overhead for transmitting synchronization information;
- the second synchronization module is configured to perform time synchronization according to the synchronization information updated by the egress end of the OTN network.
- the embodiment of the present invention provides a third receiving end, where the third receiving end includes: a third detecting module, a second acquiring module, and a third synchronization module;
- the third detecting module is configured to detect an Ethernet physical layer link PHY for transmitting synchronization information from the flexible Ethernet group FlexE group;
- the second obtaining module is configured to obtain original synchronization information and an OTN network time difference from the Ethernet PHY overhead for transmitting synchronization information;
- the third synchronization module is configured to perform time synchronization according to the original synchronization information and the OTN network time difference.
- the embodiment of the present invention provides a system for transmitting synchronization information, where the system includes: a first sending end and a first receiving end;
- the first sending end is configured to select at least one piece from the flexible Ethernet group FlexE group An Ethernet physical layer link PHY for transmitting synchronization information;
- the first receiving end is configured to detect an Ethernet physical layer link PHY for transmitting synchronization information from a flexible Ethernet group FlexE group;
- time synchronization is performed according to the synchronization information.
- the embodiment of the present invention provides a system for transmitting synchronization information, where the system includes: a second sending end and a second receiving end;
- the second sending end is configured to select at least one Ethernet physical layer link PHY for transmitting synchronization information from the flexible Ethernet group FlexE group;
- the synchronization information storage area in the selected Ethernet PHY overhead is inserted;
- the first OTN network egress end is configured to determine the selected Ethernet PHY
- the second receiving end is configured to detect from the flexible Ethernet group FlexE group for transmission Ethernet physical layer link PHY for synchronizing information
- time synchronization is performed according to the synchronization information updated by the egress end of the OTN network.
- the embodiment of the present invention provides a system for transmitting synchronization information, where the system includes: a third sending end and a third receiving end;
- the third sending end is configured to select at least one Ethernet physical layer link PHY for transmitting synchronization information from the flexible Ethernet group FlexE group;
- the synchronization information storage area in the selected Ethernet PHY overhead is inserted;
- the second OTN network egress end is configured to determine the selected Ethernet PHY
- the third receiving end is configured to detect an Ethernet physical layer link PHY for transmitting synchronization information from the flexible Ethernet group FlexE group;
- time synchronization is performed according to the original synchronization information and the OTN network time difference.
- Embodiments of the present invention provide a method, an apparatus, and a system for transmitting synchronization information, which are implemented by selecting at least one Ethernet PHY to transmit synchronization information in a flexible Ethernet group FlexE group in a flexible Ethernet FlexE structure. Ethernet transmission synchronization information.
- 1 is a schematic diagram of a network structure of a flexible Ethernet
- FIG. 2 is a schematic flowchart of a method for transmitting synchronization information according to an embodiment of the present invention
- FIG. 3 is a schematic structural diagram of a FlexE overhead according to an embodiment of the present disclosure
- FIG. 4 is a schematic structural diagram of another FlexE overhead according to an embodiment of the present invention.
- FIG. 5 is a schematic structural diagram of a FlexE over OTN according to an embodiment of the present disclosure.
- FIG. 6 is a schematic flowchart of a method for transmitting synchronization information of a FlexE over OTN structure according to an embodiment of the present disclosure
- FIG. 7 is a schematic flowchart of a method for transmitting synchronization information of another FlexE over OTN structure according to an embodiment of the present disclosure
- FIG. 8 is a schematic flowchart of a method for transmitting synchronization information applied to a receiving end according to an embodiment of the present disclosure
- FIG. 9 is a schematic flowchart of another method for transmitting synchronization information applied to a receiving end according to an embodiment of the present invention.
- FIG. 10 is a schematic flowchart of still another method for transmitting synchronization information applied to a receiving end according to an embodiment of the present disclosure
- FIG. 11 is a schematic flowchart diagram of a specific embodiment according to an embodiment of the present disclosure.
- FIG. 12 is a schematic flowchart diagram of another specific embodiment according to an embodiment of the present disclosure.
- FIG. 13 is a schematic flowchart diagram of still another specific embodiment of the present invention.
- FIG. 14 is a schematic structural diagram of a first sending end according to an embodiment of the present disclosure.
- FIG. 15 is a schematic structural diagram of another first sending end according to an embodiment of the present disclosure.
- FIG. 16 is a schematic structural diagram of a second sending end according to an embodiment of the present disclosure.
- FIG. 17 is a schematic structural diagram of a third transmitting end according to an embodiment of the present disclosure.
- FIG. 18 is a schematic structural diagram of a first receiving end according to an embodiment of the present disclosure.
- FIG. 19 is a schematic structural diagram of a second receiving end according to an embodiment of the present disclosure.
- FIG. 20 is a schematic structural diagram of a third receiving end according to an embodiment of the present disclosure.
- FIG. 21 is a schematic structural diagram of a system for transmitting synchronization information according to an embodiment of the present disclosure.
- FIG. 22 is a schematic structural diagram of another system for transmitting synchronization information according to an embodiment of the present disclosure.
- FIG. 23 is a schematic structural diagram of another system for transmitting synchronization information according to an embodiment of the present invention.
- the network element devices synchronize by transmitting synchronization information, for example, PTP (Precision Time Protocol) (ie, IEEE 1588 time protocol) and Synchronous Status Message (SSM).
- PTP Precision Time Protocol
- SSM Synchronous Status Message
- a flexible Ethernet group FlexE group in a flexible Ethernet FlexE structure at least one Ethernet PHY is selected to transmit synchronization information, thereby implementing synchronization information transmission on a flexible Ethernet.
- the FlexE group refers to a group formed by binding several Ethernet PHYs.
- a method for transmitting synchronization information is provided.
- the method is applied to a transmitting end of a flexible Ethernet, and the method may include:
- the sender selects at least one Ethernet physical layer link PHY for transmitting synchronization information from the flexible Ethernet group FlexE group.
- S202 The sending end encapsulates the synchronization information according to a preset encapsulation policy, and inserts the synchronization information storage area in the selected Ethernet PHY overhead.
- S203 The transmitting end sends the synchronization information by using the selected Ethernet PHY.
- the method shown in FIG. 2 it should be noted that the method can be applied to the general structure of the flexible Ethernet shown in FIG. 1. It can be understood that the transmitting end is the router A shown in FIG.
- the method shown in FIG. 2 may further include:
- the sending end sets a synchronization flag in the selected Ethernet PHY overhead; wherein the synchronization flag is used to indicate that the synchronization information is carried in the Ethernet PHY where the synchronization mark is located;
- the method further includes:
- the transmitting end sends the synchronization mark through the selected Ethernet PHY.
- the method further includes:
- the sender divides at least one of a synchronization information storage area and a synchronization flag from the reserved bytes in the FlexE overhead; wherein the synchronization flag is used to indicate the synchronization flag.
- the sending end may divide, from a reserved byte of the second row of the FlexE overhead, a synchronization flag bit of a preset first byte length and a size of a preset second byte length.
- the synchronization information storage area that is, each of the overhead frames of the selected Ethernet PHY transmits only the synchronization flag bit of the first byte length and the synchronization information byte of the second byte length.
- the synchronization flag and the value in the synchronization information storage area can be set to a default value, such as a default value of zero.
- Router A can separate two areas from the reserved bytes of the second line of the FlexE overhead, one of which is the synchronization flag and the size is 1 byte. The other is a synchronous information storage area with a size of 3 bytes. The default values of the two areas are all 0.
- the new FlexE overhead obtained after the partitioning is shown in Figure 4.
- the sending end sets the synchronization flag in the selected Ethernet PHY overhead, including: the sending end sets the synchronization flag bit in the selected Ethernet PHY overhead to 1.
- the transmitting end may also preset the Ethernet used to carry the synchronization information by using the network system to preset or the receiving end and the receiving end preset the same.
- the network PHY identifies the Ethernet PHY used to transmit the synchronization information. So that the receiving end can pass the identification of the Ethernet PHY and pre-set or negotiate A consistent Ethernet PHY identity to determine the Ethernet PHY used to carry the synchronization information.
- the sending end encapsulates the synchronization information according to a preset encapsulation policy, and inserts the synchronization information storage area in the selected Ethernet PHY overhead, including:
- the transmitting end encapsulates the synchronization information according to a frame-based general framing procedure GFP-F;
- the sender inserts the encapsulated synchronization information into the synchronization information storage area in the selected Ethernet PHY overhead.
- the synchronization information includes a precise time protocol PTP message; optionally, the generation period of the PTP message satisfies a clock time synchronization requirement.
- the generating period of the PTP packet meets the clock time synchronization requirement and is consistent with the period of the FlexE overhead multiframe; correspondingly, the sending end sends the synchronization information by using the selected Ethernet PHY, including:
- N may be 32.
- the PTP packet generation period is consistent with the FlexE overhead multiframe period, that is, one PTP packet is generated every 32 FlexE overhead frames.
- the above process can be applied to the general structure of the flexible Ethernet shown in FIG. 1.
- the transmission network is composed only of router network element devices, and thus can be referred to as a pure flexible Ethernet network.
- the method for transmitting synchronization information is to select at least one Ethernet PHY to transmit synchronization information in a flexible Ethernet group FlexE group in the flexible Ethernet FlexE structure, thereby implementing synchronization information transmission on the flexible Ethernet.
- the above embodiment is directed to a purely flexible Ethernet network.
- the non-Ethernet network uses an Optical Transport Network (OTN) as an example, that is, FlexE.
- OTN Optical Transport Network
- FlexE Optical Transport Network
- this embodiment provides a method for transmitting synchronization information, as shown in FIG. The method includes:
- the sender selects at least one Ethernet physical layer link PHY for transmitting synchronization information from the flexible Ethernet group FlexE group.
- the transmitting end encapsulates the original synchronization information according to a preset encapsulation policy, and inserts the synchronization information storage area in the selected Ethernet PHY overhead.
- the sending end sends the original synchronization information to the OTN network egress end through the selected Ethernet PHY.
- the OTN network egress end determines the selected Ethernet PHY
- the OTN network egress end decapsulates the selected Ethernet PHY to obtain original synchronization information.
- the OTN network egress end updates the original synchronization information according to the OTN network time difference, and obtains updated synchronization information.
- the OTN network egress end encapsulates the updated synchronization information according to the preset encapsulation policy, and inserts the synchronization information storage area in the selected Ethernet PHY overhead.
- the OTN network egress end sends the updated synchronization information by using the selected Ethernet PHY.
- steps S601 to S603 are the same as steps S201 to S203 in the foregoing embodiment, and details are not described herein.
- the method shown in FIG. 6 may further include:
- the sending end sets a synchronization flag in the selected Ethernet PHY overhead; wherein the synchronization flag is used to indicate that the synchronization information is carried in the Ethernet PHY where the synchronization mark is located;
- determining the selected Ethernet PHY for the OTN network egress end in step S604 may include: the OTN network egress end parsing the synchronization flag of the Ethernet PHY to determine the selected Ethernet PHY;
- the method may further include: the OTN network egress end passes the selected Ethernet The PHY sends the synchronization flag.
- the method further includes:
- the sender divides at least one of a synchronization information storage area and a synchronization flag from the reserved bytes in the FlexE overhead; wherein the synchronization flag is used to indicate the synchronization flag.
- the sending end sets the synchronization flag in the selected Ethernet PHY overhead, including: the sending end sets the synchronization flag bit in the selected Ethernet PHY overhead to 1.
- the transmitting end may also preset the Ethernet used to carry the synchronization information by using the network system to preset or the receiving end and the receiving end preset the same.
- the network PHY identifies the Ethernet PHY used to transmit the synchronization information.
- the receiving end can determine the Ethernet PHY for carrying the synchronization information by the identity of the Ethernet PHY and the preset or negotiated Ethernet PHY identity.
- the sending end encapsulates the synchronization information according to a preset encapsulation policy, and inserts the synchronization information storage area in the selected Ethernet PHY overhead, including:
- the transmitting end encapsulates the synchronization information according to a frame-based general framing procedure GFP-F;
- the sender inserts the encapsulated synchronization information into the synchronization information storage area in the selected Ethernet PHY overhead.
- the synchronization information includes a precise time protocol PTP message; optionally, the generation period of the PTP message satisfies a clock time synchronization requirement.
- the embodiment illustrated in FIG. 2 is directed to a purely flexible Ethernet network; the embodiment illustrated in FIG. 6 is directed to a flexible Ethernet network spanning a non-Ethernet network, wherein the non-Ethernet network is optically transported (OTN, Optical) Transport Network), for example, in the network environment of FlexE over OTN, It is also necessary to apply the time difference of the OTN network to the entire transmission network at the exit of the OTN network.
- OTN optically transported
- the FlexE over OTN structure shown in FIG. 5 is taken as an example.
- the implementation of the present invention provides a method for transmitting synchronization information. Referring to FIG. 7, the method includes:
- the sender selects at least one Ethernet physical layer link PHY for transmitting synchronization information from the flexible Ethernet group FlexE group.
- the transmitting end encapsulates the original synchronization information according to a preset encapsulation policy, and inserts the synchronization information storage area in the selected Ethernet PHY overhead.
- the sending end sends the original synchronization information to the OTN network egress end by using the selected Ethernet PHY.
- the OTN network egress end determines the selected Ethernet PHY.
- the OTN network egress end encapsulates the OTN network time difference according to the preset encapsulation policy, and inserts the management channel in the selected Ethernet PHY overhead.
- the OTN network egress end sends the original synchronization information and the OTN network time difference through the selected Ethernet PHY.
- steps S701 to S703 are the same as steps S201 to S203 in the embodiment shown in FIG. 2, and details are not described herein.
- the method shown in FIG. 7 may further include:
- the sending end sets a synchronization flag in the selected Ethernet PHY overhead; wherein the synchronization flag is used to indicate that the synchronization information is carried in the Ethernet PHY where the synchronization mark is located;
- step S704 determining, by the OTN network egress end, the selected Ethernet PHY in step S704, the OTN network egress end parsing the synchronization flag of the Ethernet PHY to determine the selected Ethernet PHY;
- the method may further include: the OTN network egress end passes the The selected Ethernet PHY sends the synchronization flag.
- the method further includes:
- the sender divides at least one of a synchronization information storage area and a synchronization flag from the reserved bytes in the FlexE overhead; wherein the synchronization flag is used to indicate the synchronization flag.
- the sending end sets the synchronization flag in the selected Ethernet PHY overhead, including: the sending end sets the synchronization flag bit in the selected Ethernet PHY overhead to 1.
- the transmitting end may also preset the Ethernet used to carry the synchronization information by using the network system to preset or the receiving end and the receiving end preset the same.
- the network PHY identifies the Ethernet PHY used to transmit the synchronization information.
- the receiving end can determine the Ethernet PHY for carrying the synchronization information by the identity of the Ethernet PHY and the preset or negotiated Ethernet PHY identity.
- the sending end encapsulates the synchronization information according to a preset encapsulation policy, and inserts the synchronization information storage area in the selected Ethernet PHY overhead, including:
- the transmitting end encapsulates the synchronization information according to a frame-based general framing procedure GFP-F;
- the sender inserts the encapsulated synchronization information into the synchronization information storage area in the selected Ethernet PHY overhead.
- the synchronization information includes a precise time protocol PTP message; optionally, the generation period of the PTP message satisfies a clock time synchronization requirement.
- FIG. 8 a method for transmitting synchronization information according to an embodiment of the present invention is shown, which is applied to the receiving end of the pure flexible Ethernet shown in FIG. 1. Therefore, the method described in this embodiment is directed to The receiving end corresponds to the transmitting end described in the embodiment shown in FIG. 2, and the method includes:
- S801 The receiving end detects, from the flexible Ethernet group FlexE group, the information used for transmitting the synchronization information.
- Ethernet PHY Ethernet PHY
- the receiving end parses the synchronization information from the synchronization information storage area in the Ethernet PHY overhead for transmitting synchronization information to obtain the encapsulated synchronization information.
- S803 The receiving end acquires the synchronization information from the encapsulated synchronization information by using a preset decapsulation policy.
- S804 The receiving end performs time synchronization according to the synchronization information.
- the Ethernet PHY overhead for transmitting the synchronization information further includes: a synchronization flag; wherein the synchronization flag is used to indicate that the synchronization information is carried in the Ethernet PHY where the synchronization tag is located; therefore, the Ethernet
- the network PHY overhead may include a synchronization flag bit and a synchronization information storage area; wherein the synchronization flag bit and the value in the synchronization information storage area are set to 0 by default;
- the synchronization flag is set to 1 for the synchronization flag bit in the Ethernet PHY overhead.
- the structure of the Ethernet PHY that is added to the synchronization information storage area and the synchronization information storage area may be as shown in FIG. 4, which is not described in this embodiment.
- the receiving end of the step S801 detects the Ethernet physical layer link PHY for transmitting synchronization information from the flexible Ethernet group FlexE group, including:
- the receiving end determines the Ethernet PHY for transmitting synchronization information by detecting a synchronization flag in the Ethernet PHY from the FlexE group.
- the sending end may also be pre-set by the network system or the sending end and the receiving end preset the same.
- the synchronization information includes a precise time protocol PTP message.
- the encapsulated synchronization information is synchronization information encapsulated according to a frame-based general framing procedure GFP-F;
- the receiving end obtains the original synchronization information from the encapsulated synchronization information by using a preset decapsulation policy, including:
- the receiving end decapsulates the encapsulated synchronization information according to GFP-F to obtain original synchronization information.
- a method for transmitting synchronization information on a transmitting end side obtains an Ethernet PHY for transmitting a synchronization signal by parsing from a FlexE group, and obtains synchronization information from the synchronization information to implement synchronization in the flexible Ethernet structure. Transfer synchronization information.
- the embodiment shown in FIG. 8 is directed to the router B shown in FIG. 1; and the flexible Ethernet network spans the non-Ethernet network, and the optical transport network (OTN) is taken as an example, that is, in the network environment of the FlexE over OTN. It is also necessary to apply the time difference of the OTN network to the entire transmission network at the exit of the OTN network.
- FIG. 9 a method for transmitting synchronization information according to an embodiment of the present invention is shown, and the receiving end of the embodiment corresponds to the transmitting end described in the embodiment of FIG. 6 , and therefore, for FIG. 5
- the receiving end shown is router B, and the method includes:
- the receiving end detects an Ethernet physical layer link PHY for transmitting synchronization information from the flexible Ethernet group FlexE group.
- the receiving end acquires synchronization information updated by the egress end of the OTN network from an Ethernet PHY overhead for transmitting synchronization information.
- S903 The receiving end performs time synchronization according to the synchronization information updated by the egress end of the OTN network.
- the Ethernet PHY overhead for transmitting the synchronization information further includes: a synchronization flag; wherein the synchronization flag is used to indicate that the synchronization information is carried in the Ethernet PHY where the synchronization tag is located; therefore, the Ethernet
- the network PHY overhead may include a synchronization flag bit and a synchronization information storage area; wherein the synchronization flag bit and the value in the synchronization information storage area are set to 0 by default;
- the synchronization flag is set to 1 for the synchronization flag bit in the Ethernet PHY overhead.
- the structure of the Ethernet PHY that is added to the synchronization information storage area and the synchronization information storage area may be as shown in FIG. 4, which is not described in this embodiment.
- the receiving end of the step S901 detects the Ethernet physical layer link PHY for transmitting synchronization information from the flexible Ethernet group FlexE group, including:
- the receiving end determines the Ethernet PHY for transmitting synchronization information by detecting a synchronization flag in the Ethernet PHY from the FlexE group.
- the sending end may also be pre-set by the network system or the sending end and the receiving end preset the same.
- the synchronization information includes a precise time protocol PTP message.
- the encapsulated synchronization information is synchronization information encapsulated according to a frame-based general framing procedure GFP-F;
- the receiving end obtains the original synchronization information from the encapsulated synchronization information by using a preset decapsulation policy, including:
- the receiving end decapsulates the encapsulated synchronization information according to GFP-F to obtain original synchronization information.
- the embodiment shown in FIG. 8 is directed to the router B shown in FIG. 1; and the flexible Ethernet network spans the non-Ethernet network, and the optical transport network (OTN) is taken as an example, that is, in the network environment of the FlexE over OTN. It is also necessary to apply the time difference of the OTN network to the entire transmission network at the exit of the OTN network.
- FIG. 10 a method for transmitting synchronization information according to an embodiment of the present invention is shown, and the receiving end for the embodiment corresponds to the transmitting end of the embodiment shown in FIG. 7, and therefore, for the embodiment shown in FIG.
- the receiving end is the router B, and the method includes:
- the receiving end detects an Ethernet physical layer link PHY used for transmitting synchronization information from the flexible Ethernet group FlexE group;
- the receiving end acquires original synchronization information and an OTN network time difference from the Ethernet PHY overhead for transmitting synchronization information.
- S1003 The receiving end performs time synchronization according to the original synchronization information and the OTN network time difference.
- the Ethernet PHY overhead for transmitting the synchronization information further includes: a synchronization flag; wherein the synchronization flag is used to indicate that the synchronization information is carried in the Ethernet PHY where the synchronization tag is located; therefore, the Ethernet
- the network PHY overhead may include a synchronization flag bit and synchronization information storage. a storage area; wherein the synchronization flag and the value in the synchronization information storage area are set to 0 by default;
- the synchronization flag is set to 1 for the synchronization flag bit in the Ethernet PHY overhead.
- the structure of the Ethernet PHY that is added to the synchronization information storage area and the synchronization information storage area may be as shown in FIG. 4, which is not described in this embodiment.
- the receiving end detects an Ethernet physical layer link PHY for transmitting synchronization information from the flexible Ethernet group FlexE group, including:
- the receiving end determines the Ethernet PHY for transmitting synchronization information by detecting a synchronization flag in the Ethernet PHY from the FlexE group.
- the sending end may also be pre-set by the network system or the sending end and the receiving end preset the same.
- the synchronization information includes a precise time protocol PTP message.
- the encapsulated synchronization information is synchronization information encapsulated according to a frame-based general framing procedure GFP-F;
- the receiving end obtains the original synchronization information from the encapsulated synchronization information by using a preset decapsulation policy, including:
- the receiving end decapsulates the encapsulated synchronization information according to GFP-F to obtain original synchronization information.
- the embodiment of the present invention further provides a method for transmitting synchronization information, where the method is applied to a transmitting end and a receiving end, and the method includes:
- the sender selects at least one Ethernet physical layer link PHY for transmitting synchronization information from the flexible Ethernet group FlexE group;
- the sending end After the sending end encapsulates the synchronization information according to a preset encapsulation policy, the sending end inserts the selected information. a synchronization information storage area in the Ethernet PHY overhead;
- the receiving end detects an Ethernet physical layer link PHY for transmitting synchronization information from a flexible Ethernet group FlexE group;
- the receiving end parses the encapsulated synchronization information from the synchronization information storage area in the Ethernet PHY overhead for transmitting synchronization information;
- the receiving end acquires the synchronization information from the encapsulated synchronization information by using a preset decapsulation policy
- the receiving end performs time synchronization according to the synchronization information.
- This application example uses a purely flexible Ethernet consisting of two routers as shown in Figure 1.
- the 400G customer service needs to be transmitted from Router A to Router B.
- the rate of each Ethernet PHY is 100G, so 400G.
- the service can be carried in four Ethernet PHYs.
- the FlexE group here includes four Ethernet PHYs, and the synchronization information is PTP packets. Referring to Figure 11, it may include:
- Router A arbitrarily selects an Ethernet PHY from the four Ethernet PHYs to carry PTP packets.
- Router A divides two areas from the reserved bytes of the second line of the FlexE overhead, one of which is a synchronization flag and the size is 1 byte; the other is a synchronization information storage area, and the size is 3 bytes.
- the divided FlexE overhead structure is shown in Figure 4.
- the default values of the two regions are all zeros.
- Router A sets all the synchronization flag bits in the selected Ethernet PHY overhead for transmitting PTP packets, and does not operate on the unselected Ethernet PHY.
- Router A encapsulates the PTP packet in GFP-F and inserts it into the selected synchronization information storage area of the Ethernet PHY overhead for transmitting PTP packets. For the unselected Ethernet PHY. Then do nothing.
- the PTP packet generation period is the same as the FlexE overhead multiframe period, that is, one PTP packet is generated every 32 FlexE overhead frames.
- Router B detects the Ethernet PHY carrying the PTP packet by detecting the synchronization flag bit in each Ethernet PHY overhead.
- the router B After detecting the Ethernet PHY carrying the PTP packet, the router B parses the GFP-F encapsulated PTP packet from the synchronization information storage area in the Ethernet PHY overhead, and performs GFP-F decapsulation to restore the original The PTP message is then time synchronized according to the PTP message.
- the router A in the application example corresponds to the transmitting end in the embodiment described in FIG. 2; the router B corresponds to the receiving end in the embodiment described in FIG.
- This application example uses the FlexE over OTN shown in Figure 5 as an application scenario to set a 300G customer service to be transmitted from Router A to Router B.
- Each Ethernet PHY has a rate of 100G and is divided into four Ethernet PHYs.
- Each PHY contains five unavailable time slots. The five unavailable time slots are removed at the entrance of the OTN network, and are inserted back at the exit of the OTN network.
- the synchronization information is a PTP message. Referring specifically to FIG. 12, it may include:
- Router A arbitrarily selects an Ethernet PHY from the four Ethernet PHYs to carry PTP packets.
- Router A divides two areas from the reserved bytes of the second line of the FlexE overhead, one of which is a synchronization flag and the size is 1 byte; the other is a synchronization information storage area, and the size is 3 bytes.
- the divided FlexE overhead structure is shown in Figure 4.
- the default values of the two regions are all zeros.
- Router A sets all the synchronization flag bits in the selected Ethernet PHY overhead for transmitting PTP packets, and does not operate on the unselected Ethernet PHY.
- Router A encapsulates the PTP packet in GFP-F and inserts it into the synchronization information storage area of the selected Ethernet PHY overhead for transmitting PTP packets. The operation is not performed for the unselected Ethernet PHY.
- the complete PTP packet is transmitted in the same overhead multiframe mode as the FlexE, that is, a complete PTP packet is transmitted through 32 FlexE overhead frames.
- the generation period of the PTP packet is consistent with the period of the FlexE overhead multiframe. That is, a PTP message is generated every 32 FlexE overhead frames.
- the egress port of the OTN network detects the synchronization flag of each Ethernet PHY, determines the Ethernet PHY that carries the PTP packet, and parses the GFP-F encapsulation from the synchronization information storage area in the Ethernet PHY overhead. In the PTP packet, the GFP-F decapsulation operation restores the original PTP packet.
- S1206 The result of calculating the time difference between the original PTP packet information obtained by the OTN network and the OTN network is GFP-F encapsulated, inserted into the synchronization information storage area corresponding to the Ethernet PHY overhead, and then sent out.
- time difference of the OTN network can be obtained through the OSMC overhead of the OTN.
- Router B confirms the Ethernet PHY carrying the PTP packet by detecting the synchronization flag bit in each Ethernet PHY.
- the router B After detecting the Ethernet PHY carrying the PTP packet, the router B parses the GFP-F encapsulated PTP packet from the synchronization information storage area in the corresponding Ethernet PHY overhead, and performs GFP-F decapsulation to recover. The original PTP packet is then time synchronized according to the PTP packet.
- the router A in the application example corresponds to the transmitting end and the OTN network egress end in the embodiment shown in FIG. 6; the router B corresponds to the receiving end in the embodiment described in FIG.
- This application example still uses FlexE over OTN as shown in Figure 5 to set up a 150G client service to be transmitted from Router A to Router B.
- the rate of each Ethernet PHY is 100G, which is divided into 2 Ethernet PHY bearers.
- Each PHY includes five unavailable time slots, and the five unavailable time slots are removed at the entrance of the OTN network, and are inserted back at the exit of the OTN network, and the synchronization information is a PTP message. Referring to Figure 13, it may include:
- Router A arbitrarily selects an Ethernet PHY from the two Ethernet PHYs to carry PTP packets.
- Router A divides two areas from the reserved bytes of the second line of the FlexE overhead, one of which is a synchronization flag and the size is 1 byte; the other is a synchronization information storage area, and the size is 3 bytes.
- the divided FlexE overhead structure is shown in Figure 4.
- the default values of the two regions are all zeros.
- Router A sets all the synchronization flag bits in the selected Ethernet PHY overhead for transmitting PTP packets, and does not operate on the unselected Ethernet PHY.
- Router A encapsulates the PTP packet in GFP-F and inserts it into the selected synchronization information storage area of the Ethernet PHY overhead for transmitting PTP packets. The operation is not performed on the unselected Ethernet PHY.
- the complete PTP packet is transmitted in the same overhead multiframe mode as the FlexE, that is, a complete PTP packet is transmitted through 32 FlexE overhead frames.
- the generation period of the PTP packet is consistent with the period of the FlexE overhead multiframe. That is, a PTP message is generated every 32 FlexE overhead frames.
- S1305 The egress end of the OTN network detects the synchronization flag of each Ethernet PHY, and determines an Ethernet PHY that carries PTP packets.
- the egress of the OTN network calculates the time difference of the OTN network by using the OSMC overhead of the OTN, and performs GFP-F encapsulation on the time difference information of the OTN network, and inserts the encapsulated time difference information into the Ethernet PHY overhead that carries the PTP packet.
- the segment management channel is in the channel.
- Router B confirms the Ethernet PHY carrying the PTP packet by detecting the synchronization flag bit in each Ethernet PHY.
- the router B After detecting the Ethernet PHY carrying the PTP packet, the router B parses the GFP-F encapsulated PTP packet from the synchronization information storage area in the corresponding Ethernet PHY overhead, and uses the PHY overhead middle layer management channel. The time difference information of the OTN network encapsulated by the GFP-F is parsed, and the GFP-F decapsulation of the two information is used to recover the original PTP packet and the OTN network time difference, and then time synchronization is performed according to the two original information.
- the router A in the application example corresponds to the transmitting end and the OTN network egress end in the embodiment described in FIG. 7; the router B corresponds to the receiving end in the embodiment described in FIG.
- the embodiment of the present invention selects at least one Ethernet in a flexible Ethernet group FlexE group in the flexible Ethernet FlexE structure.
- Network PHY transmits synchronization information, thus achieving flexibility Ethernet transmission synchronization information.
- the first sending end 140 includes: a first selecting module 1401, a first inserting module 1402, and a first sending module 1403; ,
- the first selecting module 1401 is configured to select at least one Ethernet physical layer link PHY for transmitting synchronization information from the flexible Ethernet group FlexE group;
- the first insertion module 1402 is configured to insert the synchronization information according to a preset encapsulation policy, and insert the synchronization information storage area in the selected Ethernet PHY overhead;
- the first sending module 1403 is configured to send the synchronization information by using the selected Ethernet PHY.
- the first sending end 140 further includes a first setting module 1404, configured to set a synchronization mark in the selected Ethernet PHY overhead; wherein the synchronization mark is used to mark the location
- the Ethernet PHY in which the synchronization tag is located carries the synchronization information.
- the first sending end 140 further includes: a first dividing module 1405, configured to divide at least one of a synchronization information storage area and a synchronization flag bit from reserved bytes in the FlexE overhead; The synchronization flag is used to indicate the synchronization flag.
- the first insertion module 1402 is configured to encapsulate the synchronization information according to a frame-based general framing procedure GFP-F;
- the encapsulated synchronization information is inserted into the synchronization information storage area in the selected Ethernet PHY overhead.
- the synchronization information includes a precise time protocol PTP message.
- the generation period of the PTP packet meets the clock time synchronization requirement.
- the second sending end 160 includes: a second selecting module 1601, a second inserting module 1602, a second sending module 1603, and a An optical transport network OTN network exit end 1604; wherein
- the second selecting module 1601 is configured to select at least one Ethernet physical layer link PHY for transmitting synchronization information from the flexible Ethernet group FlexE group;
- the second insertion module 1602 is configured to encapsulate the original synchronization information according to a preset encapsulation policy, and insert the synchronization information storage area in the selected Ethernet PHY overhead;
- the second sending module 1603 is configured to send the original synchronization information to the egress end of the first OTN network by using the selected Ethernet PHY;
- the first OTN network egress end 1604 is configured to determine the selected Ethernet PHY
- a third sending end 170 is provided in the embodiment of the present invention.
- the third sending end 170 may include: a third selecting module 1701, a third inserting module 1702, and a third sending module 1703. a second optical transport network OTN network exit end 1704; wherein
- the third selection module 1701 is configured to select at least one Ethernet physical layer link PHY for transmitting synchronization information from the flexible Ethernet group FlexE group;
- the third insertion module 1702 is configured to encapsulate the original synchronization information according to a preset encapsulation policy, and insert the synchronization information storage area in the selected Ethernet PHY overhead;
- the third sending module 1703 is configured to send the original synchronization information to the second OTN network egress end by using the selected Ethernet PHY;
- the second OTN network egress end 1704 is configured to determine the selected Ethernet PHY
- a structure of a first receiving end 180 includes: a first detecting module 1801, a first parsing module 1802, a first decapsulating module 1803, and a first a synchronization module 1804; wherein
- the first detecting module 1801 is configured to detect an Ethernet physical layer link PHY for transmitting synchronization information from a flexible Ethernet group FlexE group;
- the first parsing module 1802 is configured to parse the encapsulated synchronization information from a synchronization information storage area in an Ethernet PHY overhead for transmitting synchronization information;
- the first decapsulation module 1803 is configured to obtain the synchronization information from the encapsulated synchronization information by using a preset decapsulation policy
- the first synchronization module 1804 is configured to perform time synchronization according to the synchronization information.
- the Ethernet PHY for transmitting the synchronization information further includes: a synchronization flag; wherein the synchronization flag is used to indicate that the synchronization information is carried in the Ethernet PHY where the synchronization tag is located.
- the first detecting module 1801 is configured to:
- the Ethernet PHY for transmitting synchronization information is determined from the FlexE group by detecting a synchronization flag in the Ethernet PHY.
- the synchronization information includes a precise time protocol PTP message.
- the encapsulated synchronization information is synchronization information encapsulated according to the frame-based general framing procedure GFP-F;
- the first decapsulation module 1803 is configured to:
- the encapsulated synchronization information is decapsulated according to GFP-F to obtain original synchronization information.
- the second receiving end 190 may include: a second detecting module 1901, a first obtaining module 1902, and a second synchronizing module 1903; among them,
- the second detecting module 1901 is configured to detect an Ethernet physical layer link PHY for transmitting synchronization information from a flexible Ethernet group FlexE group;
- the first obtaining module 1902 is configured to obtain synchronization information updated by the egress end of the OTN network from the Ethernet PHY overhead for transmitting synchronization information;
- the second synchronization module 1903 is configured to be updated according to an egress end of the OTN network. Synchronize information for time synchronization.
- a third receiving end 200 is provided in the embodiment of the present invention.
- the third receiving end 200 may include: a third detecting module 2001, a second obtaining module 2002, and a third synchronization module 2003; among them,
- the third detecting module 2001 is configured to detect an Ethernet physical layer link PHY for transmitting synchronization information from the flexible Ethernet group FlexE group;
- the second obtaining module 2002 is configured to obtain original synchronization information and an OTN network time difference from the Ethernet PHY overhead for transmitting synchronization information;
- the third synchronization module 2003 is configured to perform time synchronization according to the original synchronization information and the OTN network time difference.
- the system 210 includes: a first sending end 140 and a first receiving end 180;
- the first sending end 140 is configured to select at least one Ethernet physical layer link PHY for transmitting synchronization information from the flexible Ethernet group FlexE group;
- the first receiving end 180 is configured to detect an Ethernet physical layer link PHY for transmitting synchronization information from a flexible Ethernet group FlexE group;
- time synchronization is performed according to the synchronization information.
- the system 220 includes: a second sending end 160 and a second receiving end 190;
- the second sending end 160 is configured to select at least one of the flexible Ethernet groups FlexE group An Ethernet physical layer link PHY for transmitting synchronization information;
- the synchronization information storage area in the selected Ethernet PHY overhead is inserted;
- the first OTN network egress end 1604 is configured to determine the selected Ethernet PHY
- the second receiving end 190 is configured to detect an Ethernet physical layer link PHY for transmitting synchronization information from the flexible Ethernet group FlexE group;
- time synchronization is performed according to the synchronization information updated by the egress end of the OTN network.
- the system 230 includes: a third sending end 170 and a third receiving end 200;
- the third sending end 170 is configured to select at least one Ethernet physical layer link PHY for transmitting synchronization information from the flexible Ethernet group FlexE group;
- the synchronization information storage area in the selected Ethernet PHY overhead is inserted;
- the second OTN network egress end 1704 is configured to determine the selected Ethernet PHY
- the third receiving end 200 is configured to detect an Ethernet physical layer link PHY for transmitting synchronization information from a flexible Ethernet group FlexE group;
- time synchronization is performed according to the original synchronization information and the OTN network time difference.
- computer storage medium includes volatile and nonvolatile, implemented in any method or technology for storing information, such as computer readable instructions, data structures, program modules, or other data. , removable and non-removable media.
- Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disc (DVD) or other optical disc storage, magnetic cartridge, magnetic tape, magnetic disk storage or other magnetic storage device, or may Any other medium used to store the desired information and that can be accessed by the computer.
- communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal, such as a carrier wave or other transport mechanism, and can include any information delivery media.
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Abstract
一种传输同步信息的方法、装置和系统;该方法可以包括:发送端从灵活以太网组FlexE group中选取至少一条用于传输同步信息的以太网物理层链路PHY(S201);所述发送端将所述同步信息按照预设的封装策略进行封装后,插入选中的以太网PHY开销中的同步信息存储区(S202);所述发送端通过所述选中的以太网PHY发送所述同步信息(S203)。
Description
本文涉及但不限于有线通信技术,尤其涉及一种传输同步信息的方法、装置和系统。
灵活以太网(FlexE,Flexible Ethernet)技术由国际标准化组织光互联论坛(OIF,Optical Internetworking Forum)于2015年3月发起研究并于2016年3月正式表决通过相关的技术文档。灵活以太网的通用结构如图1所示。灵活以太网一个特性就是:绑定多个速率相同的以太网PHY来传输MAC速率比较大的业务,例如绑定4个100G的以太网物理层(PHY,PHYsical Layer)通道来支持介质访问控制(MAC,Media Access Control)速率为400G的客户业务,即客户业务是在多条以太网PHY中传输的。
灵活以太网与传统以太网结构上的区别在于灵活以太网在MAC层和物理编码子层(PCS,Physical Coding Sublayer)之间多了一个垫层(FlexE Shim),该垫层的功能是构建一个大小为20×n个长度为66字节byte块(66b块)的日历Calendar,其中,n为绑定的以太网PHY个数,每个66byte块代表一个5G的时隙。
在复用侧,不同MAC速率的业务可以按照与5G的倍数关系,装进对应个数的66b块中。每20个66b块构成一个子日历sub-Calendar,大小为20×n的Calendar分布到n个sub-Calendar中。对于每个sub-Calendar,每20×1023个66b块对应添加一个66b块的开销,用来存储相关的映射关系,每个sub-Calendar在单个100G的以太网PHY中传送。
对应的,在解复用侧,n个sub-Calendar可以组成一个大小为20×n的Calendar,根据开销中存储的映射关系从相应个数的66b块中提取出对应的客户业务。
发明内容
以下是对本文详细描述的主题的概述。本概述并非是为了限制权利要求的保护范围。
本发明实施例期望提供一种传输同步信息的方法、装置和系统,从而实现在灵活以太网传输同步信息。
第一方面,本发明实施例提供了一种传输同步信息的方法,所述方法包括:
发送端从灵活以太网组FlexE group中选取至少一条用于传输同步信息的以太网物理层链路PHY;
所述发送端将所述同步信息按照预设的封装策略进行封装后,插入选中的以太网PHY开销中的同步信息存储区;
所述发送端通过所述选中的以太网PHY发送所述同步信息。
在上述方案中,所述方法还包括:
所述发送端在所述选中的以太网PHY开销中设置同步标记;其中,所述同步标记用于标示所述同步标记所在的以太网PHY中承载有同步信息;
相应地,所述发送端通过所述选中的以太网PHY发送所述同步信息时,所述方法还包括:
所述发送端通过所述选中的以太网PHY发送所述同步标记。
在上述方案中,所述方法还包括:
所述发送端从FlexE开销中保留字节中划分出同步信息存储区和同步标志位中至少一个;其中,所述同步标志位用于标示所述同步标记。
在上述方案中,所述发送端从FlexE开销中保留字节中划分出同步信息存储区和同步标志位中至少一个,包括:
所述发送端从FlexE开销的保留字节中划分出大小为预设的第一字节长度的同步标志位以及大小为预设的第二字节长度的同步信息存储区。
在上述方案中,所述发送端将所述同步信息按照预设的封装策略进行封
装后,插入选中的以太网PHY开销中的同步信息存储区,包括:
所述发送端将所述同步信息按照基于帧的通用成帧规程GFP-F进行封装;
所述发送端将封装后的同步信息插入到所述选中的以太网PHY开销中的同步信息存储区。
在上述方案中,所述同步信息包括精确时间协议PTP报文。
在上述方案中,所述PTP报文的产生周期满足时钟时间同步要求。
在上述方案中,所述发送端通过所述选中的以太网PHY发送所述同步信息,包括:
通过所述选中的以太网PHY中的N个FlexE开销帧发送一个完整的PTP报文。
第二方面,本发明实施例提供了一种传输同步信息的方法,所述方法包括:
发送端从灵活以太网组FlexE group中选取至少一条用于传输同步信息的以太网物理层链路PHY;
所述发送端将原始同步信息按照预设的封装策略进行封装后,插入选中的以太网PHY开销中的同步信息存储区;
所述发送端通过所述选中的以太网PHY发送所述原始同步信息至OTN网络出口端;
所述OTN网络出口端确定所述选中的以太网PHY;
所述OTN网络出口端从所述选中的以太网PHY中解封装得到原始同步信息;
所述OTN网络出口端根据所述OTN网络时间差更新所述原始同步信息,获得更新后的同步信息;
所述OTN网络出口端将所述更新后的同步信息按照所述预设的封装策略进行封装后,插入所述选中的以太网PHY开销中的同步信息存储区;
所述OTN网络出口端通过所述选中的以太网PHY发送所述更新后的同
步信息。
在上述方案中,所述方法还包括:
所述发送端在所述选中的以太网PHY开销中设置同步标记;其中,所述同步标记用于标示所述同步标记所在的以太网PHY中承载有同步信息;
相应地,所述OTN网络出口端确定所述选中的以太网PHY,包括:所述OTN网络出口端解析以太网PHY的所述同步标记确定所述选中的以太网PHY;
相应地,所述OTN网络出口端通过所述选中的以太网PHY发送所述更新后的同步信息时,所述方法还包括:所述OTN网络出口端通过所述选中的以太网PHY发送所述同步标记。
在上述方案中,所述方法还包括:
所述发送端从FlexE开销中保留字节中划分出同步信息存储区和同步标志位中至少一个;其中,所述同步标志位用于标示所述同步标记。
在上述方案中,所述发送端将所述同步信息按照预设的封装策略进行封装后,插入选中的以太网PHY开销中的同步信息存储区,包括:
所述发送端将所述同步信息按照基于帧的通用成帧规程GFP-F进行封装;
所述发送端将封装后的同步信息插入到所述选中的以太网PHY开销中的同步信息存储区。
在上述方案中,所述同步信息包括精确时间协议PTP报文。
在上述方案中,所述PTP报文的产生周期满足时钟时间同步要求。
第三方面,本发明实施例提供了一种传输同步信息的方法,所述方法包括:
发送端从灵活以太网组FlexE group中选取至少一条用于传输同步信息的以太网物理层链路PHY;
所述发送端将原始同步信息按照预设的封装策略进行封装后,插入选中的以太网PHY开销中的同步信息存储区;
所述发送端通过所述选中的以太网PHY发送所述原始同步信息至OTN网络出口端;
所述OTN网络出口端确定所述选中的以太网PHY;
所述OTN网络出口端将所述OTN网络时间差按照所述预设的封装策略进行封装后,插入所述选中的以太网PHY开销中的管理通道;
所述OTN网络出口端通过所述选中的以太网PHY发送所述原始同步信息和所述OTN网络时间差。
在上述方案中,所述方法还包括:所述发送端在所述选中的以太网PHY开销中设置同步标记;其中,所述同步标记用于标示所述同步标记所在的以太网PHY中承载有同步信息;
相应地,所述OTN网络出口端确定所述选中的以太网PHY,包括:所述OTN网络出口端解析以太网PHY的所述同步标记确定所述选中的以太网PHY;
相应地,所述OTN网络出口端通过所述选中的以太网PHY发送所述原始同步信息和所述OTN网络时间差时,所述方法还包括:所述OTN网络出口端通过所述选中的以太网PHY发送所述同步标记。
在上述方案中,所述方法还包括:所述发送端从FlexE开销中保留字节中划分出同步信息存储区和同步标志位中至少一个;其中,所述同步标志位用于标示所述同步标记。
在上述方案中,所述发送端将所述同步信息按照预设的封装策略进行封装后,插入选中的以太网PHY开销中的同步信息存储区,包括:
所述发送端将所述同步信息按照基于帧的通用成帧规程GFP-F进行封装;
所述发送端将封装后的同步信息插入到所述选中的以太网PHY开销中的同步信息存储区。
第四方面,本发明实施例提供了一种传输同步信息的方法,所述方法包括:
接收端从灵活以太网组FlexE group中检测用于传输同步信息的以太网
物理层链路PHY;
所述接收端从用于传输同步信息的以太网PHY开销中的同步信息存储区解析得到封装后的同步信息;
所述接收端通过预设的解封装策略从封装后的同步信息中获取所述同步信息;
所述接收端根据所述同步信息进行时间同步。
在上述方案中,用于传输同步信息的以太网PHY开销中还包括:同步标记;其中,所述同步标记用于标示所述同步标记所在的以太网PHY中承载有同步信息
相应地,所述接收端从灵活以太网组FlexE group中检测用于传输同步信息的以太网物理层链路PHY,包括:
所述接收端从FlexE group中通过检测以太网PHY中的同步标记确定所述用于传输同步信息的以太网PHY。
在上述方案中,所述同步信息包括精确时间协议PTP报文。
在上述方案中,所述封装后的同步信息为按照基于帧的通用成帧规程GFP-F进行封装后的同步信息;
相应地,所述接收端通过预设的解封装策略从封装后的同步信息中获取原始同步信息,包括:
所述接收端将所述封装后的同步信息按照GFP-F进行解封装,得到原始同步信息。
第五方面,本发明实施例提供了一种传输同步信息的方法,所述方法包括:
接收端从灵活以太网组FlexE group中检测用于传输同步信息的以太网物理层链路PHY;
所述接收端从所述用于传输同步信息的以太网PHY开销中获取由所述OTN网络出口端更新后的同步信息;
所述接收端根据由所述OTN网络出口端更新后的同步信息进行时间同
步。
第六方面,本发明实施例提供了一种传输同步信息的方法,所述方法包括:
接收端从灵活以太网组FlexE group中检测用于传输同步信息的以太网物理层链路PHY;
所述接收端从所述用于传输同步信息的以太网PHY开销中获取原始同步信息和OTN网络时间差;
所述接收端根据原始同步信息和所述OTN网络时间差进行时间同步。
第七方面,本发明实施例提供了一种传输同步信息的方法,所述方法包括:
发送端从灵活以太网组FlexE group中选取至少一条用于传输同步信息的以太网物理层链路PHY;
所述发送端将所述同步信息按照预设的封装策略进行封装后,插入选中的以太网PHY开销中的同步信息存储区;
所述发送端通过所述选中的以太网PHY向接收端发送所述同步信息;
所述接收端从灵活以太网组FlexE group中检测用于传输同步信息的以太网物理层链路PHY;
所述接收端从用于传输同步信息的以太网PHY开销中的同步信息存储区解析得到封装后的同步信息;
所述接收端通过预设的解封装策略从封装后的同步信息中获取所述同步信息;
所述接收端根据所述同步信息进行时间同步。
第八方面,本发明实施例提供了一种第一发送端,所述第一发送端包括:第一选取模块、第一插入模块和第一发送模块;其中,
所述第一选取模块,设置为从灵活以太网组FlexE group中选取至少一条用于传送同步信息的以太网物理层链路PHY;
所述第一插入模块,设置为将所述同步信息按照预设的封装策略进行封
装后,插入选中的以太网PHY开销中的同步信息存储区;
所述第一发送模块,设置为通过所述选中的以太网PHY发送所述同步信息。
在上述方案中,所述第一发送端还包括第一设置模块,设置为在所述选中的以太网PHY开销中设置同步标记;其中,所述同步标记用于标示所述同步标记所在的以太网PHY中承载有同步信息。
在上述方案中,所述第一发送端还包括:第一划分模块,设置为从FlexE开销中保留字节中划分出同步信息存储区和同步标志位中至少一个;其中,所述同步标志位用于标示所述同步标记。
在上述方案中,所述第一插入模块,是设置为将所述同步信息按照基于帧的通用成帧规程GFP-F进行封装;
以及,将封装后的同步信息插入到所述选中的以太网PHY开销中的同步信息存储区。
第九方面,本发明实施例提供了一种第二发送端,所述第二发送端包括:第二选取模块、第二插入模块、第二发送模块和第一光传送网OTN网络出口端;其中,
所述第二选取模块,设置为从灵活以太网组FlexE group中选取至少一条用于传输同步信息的以太网物理层链路PHY;
所述第二插入模块,设置为将原始同步信息按照预设的封装策略进行封装后,插入选中的以太网PHY开销中的同步信息存储区;
所述第二发送模块,设置为通过所述选中的以太网PHY发送所述原始同步信息至所述第一OTN网络出口端;
所述第一OTN网络出口端,设置为确定所述选中的以太网PHY;
以及,从所述选中的以太网PHY中解封装得到原始同步信息;
以及,根据所述OTN网络时间差更新所述原始同步信息,获得更新后的同步信息;
以及,将所述更新后的同步信息按照所述预设的封装策略进行封装后,
插入所述选中的以太网PHY开销中的同步信息存储区;
以及,通过所述选中的以太网PHY发送所述更新后的同步信息。
第十方面,本发明实施例提供了一种第三发送端,所述第三发送端包括:第三选取模块、第三插入模块、第三发送模块和第二光传送网OTN网络出口端;其中,
所述第三选取模块,设置为从灵活以太网组FlexE group中选取至少一条用于传输同步信息的以太网物理层链路PHY;
所述第三插入模块,设置为将原始同步信息按照预设的封装策略进行封装后,插入选中的以太网PHY开销中的同步信息存储区;
所述第三发送模块,设置为通过所述选中的以太网PHY发送所述原始同步信息至所述第二OTN网络出口端;
所述第二OTN网络出口端,设置为确定所述选中的以太网PHY;
以及,将所述OTN网络时间差按照所述预设的封装策略进行封装后,插入所述选中的以太网PHY开销中的管理通道;
以及,通过所述选中的以太网PHY发送所述原始同步信息和所述OTN网络时间差。
第十一方面,本发明实施例提供了一种第一接收端,所述第一接收端包括:第一检测模块、第一解析模块、第一解封装模块和第一同步模块;其中,
所述第一检测模块,设置为从灵活以太网组FlexE group中检测用于传输同步信息的以太网物理层链路PHY;
所述第一解析模块,设置为从用于传输同步信息的以太网PHY开销中的同步信息存储区解析得到封装后的同步信息;
所述第一解封装模块,设置为通过预设的解封装策略从封装后的同步信息中获取所述同步信息;
所述第一同步模块,设置为根据所述同步信息进行时间同步。
在上述方案中,设置为传输同步信息的以太网PHY开销中还包括:同步标记;其中,所述同步标记用于标示所述同步标记所在的以太网PHY中
承载有同步信息
相应地,第一检测模块,是设置为:
从FlexE group中通过检测以太网PHY中的同步标记确定所述用于传输同步信息的以太网PHY。
在上述方案中,所述封装后的同步信息为按照基于帧的通用成帧规程GFP-F进行封装后的同步信息;
相应地,所述第一解封装模块,设置为:
将所述封装后的同步信息按照GFP-F进行解封装,得到原始同步信息。
第十二方面,本发明实施例提供了一种第二接收端,所述第二接收端包括:第二检测模块、第一获取模块和第二同步模块;其中,
所述第二检测模块,设置为从灵活以太网组FlexE group中检测用于传输同步信息的以太网物理层链路PHY;
所述第一获取模块,设置为从所述用于传输同步信息的以太网PHY开销中获取由所述OTN网络出口端更新后的同步信息;
所述第二同步模块,设置为根据由所述OTN网络出口端更新后的同步信息进行时间同步。
第十三方面,本发明实施例提供了一种第三接收端,所述第三接收端包括:第三检测模块、第二获取模块和第三同步模块;其中,
所述第三检测模块,设置为从灵活以太网组FlexE group中检测用于传输同步信息的以太网物理层链路PHY;
所述第二获取模块,设置为从所述用于传输同步信息的以太网PHY开销中获取原始同步信息和OTN网络时间差;
所述第三同步模块,设置为根据原始同步信息和所述OTN网络时间差进行时间同步。
第十四方面,本发明实施例提供了一种传输同步信息的系统,所述系统包括:第一发送端和第一接收端;其中,
所述第一发送端,设置为从灵活以太网组FlexE group中选取至少一条
用于传送同步信息的以太网物理层链路PHY;
以及,将所述同步信息按照预设的封装策略进行封装后,插入选中的以太网PHY开销中的同步信息存储区;
以及,通过所述选中的以太网PHY发送所述同步信息;
所述第一接收端,设置为从灵活以太网组FlexE group中检测用于传输同步信息的以太网物理层链路PHY;
以及,从设置为传输同步信息的以太网PHY开销中的同步信息存储区解析得到封装后的同步信息;
以及,通过预设的解封装策略从封装后的同步信息中获取所述同步信息;
以及,根据所述同步信息进行时间同步。
第十五方面,本发明实施例提供了一种传输同步信息的系统,所述系统包括:第二发送端和第二接收端;其中,
所述第二发送端,设置为从灵活以太网组FlexE group中选取至少一条用于传输同步信息的以太网物理层链路PHY;
以及,将原始同步信息按照预设的封装策略进行封装后,插入选中的以太网PHY开销中的同步信息存储区;
以及,通过所述选中的以太网PHY发送所述原始同步信息至所述第一OTN网络出口端;
所述第一OTN网络出口端,设置为确定所述选中的以太网PHY;
以及,从所述选中的以太网PHY中解封装得到原始同步信息;
以及,根据所述OTN网络时间差更新所述原始同步信息,获得更新后的同步信息;
以及,将所述更新后的同步信息按照所述预设的封装策略进行封装后,插入所述选中的以太网PHY开销中的同步信息存储区;
以及,通过所述选中的以太网PHY发送所述更新后的同步信息;
所述第二接收端,设置为从灵活以太网组FlexE group中检测用于传输
同步信息的以太网物理层链路PHY;
以及,从所述用于传输同步信息的以太网PHY开销中获取由所述OTN网络出口端更新后的同步信息;
以及,根据由所述OTN网络出口端更新后的同步信息进行时间同步。
第十六方面,本发明实施例提供了一种传输同步信息的系统,所述系统包括:第三发送端和第三接收端;其中,
所述第三发送端,设置为从灵活以太网组FlexE group中选取至少一条用于传输同步信息的以太网物理层链路PHY;
以及,将原始同步信息按照预设的封装策略进行封装后,插入选中的以太网PHY开销中的同步信息存储区;
以及,通过所述选中的以太网PHY发送所述原始同步信息至所述第二OTN网络出口端;
所述第二OTN网络出口端,设置为确定所述选中的以太网PHY;
以及,将所述OTN网络时间差按照所述预设的封装策略进行封装后,插入所述选中的以太网PHY开销中的管理通道;
以及,通过所述选中的以太网PHY发送所述原始同步信息和所述OTN网络时间差;
所述第三接收端,设置为从灵活以太网组FlexE group中检测用于传输同步信息的以太网物理层链路PHY;
以及,从所述用于传输同步信息的以太网PHY开销中获取原始同步信息和OTN网络时间差;
以及,根据原始同步信息和所述OTN网络时间差进行时间同步。
本发明实施例提供了一种传输同步信息的方法、装置和系统,通过在灵活以太网FlexE结构中的一个灵活以太网组FlexE group中,选择至少一条以太网PHY传输同步信息,从而实现在灵活以太网传输同步信息。
在阅读并理解了附图和详细描述后,可以明白其他方面。
附图概述
图1为一种灵活以太网的网络结构示意图;
图2为本发明实施例提供的一种传输同步信息的方法流程示意图;
图3为本发明实施例提供的一种FlexE开销的结构示意图;
图4为本发明实施例提供的另一种FlexE开销的结构示意图;
图5为本发明实施例提供的一种FlexE over OTN结构示意图;
图6为本发明实施例提供的一种FlexE over OTN结构的传输同步信息的方法流程示意图;
图7为本发明实施例提供的另一种FlexE over OTN结构的传输同步信息的方法流程示意图;
图8为本发明实施例提供的一种应用于接收端的传输同步信息的方法流程示意图;
图9为本发明实施例提供的另一种应用于接收端的传输同步信息的方法流程示意图;
图10为为本发明实施例提供的再一种应用于接收端的传输同步信息的方法流程示意图;
图11为本发明实施例提供的一种具体实施例的流程示意图;
图12为本发明实施例提供的另一种具体实施例的流程示意图;
图13为本发明实施例提供的又一种具体实施例的流程示意图;
图14为本发明实施例提供的一种第一发送端的结构示意图;
图15为本发明实施例提供的另一种第一发送端的结构示意图;
图16为本发明实施例提供的一种第二发送端的结构示意图;
图17为本发明实施例提供的一种第三发送端的结构示意图;
图18为本发明实施例提供的一种第一接收端的结构示意图;
图19为本发明实施例提供的一种第二接收端的结构示意图;
图20为本发明实施例提供的一种第三接收端的结构示意图;
图21为本发明实施例提供的一种传输同步信息的系统结构示意图;
图22为本发明实施例提供的另一种传输同步信息的系统结构示意图;
图23为本发明实施例提供的又一种传输同步信息的系统结构示意图。
下面将结合本发明实施例中的附图,对本发明实施例中的进行清楚、完整地描述。
在同步网中,每个网元设备之间需要达到频率同步和时间同步中至少一个,即每个网元设备之间的频率偏差和时间偏差中至少一个必须保持在一个限定的范围内,通常采用的方法是网元设备间通过传送同步信息达到同步,例如:精确时间协议(PTP,Precision Time Protocol)(即IEEE 1588时间协议)、同步状态信息(SSM,Synchronous Status Message)。
基于灵活以太网与传统以太网结构上的不同,目前还没有针对灵活以太网结构进行同步信息传输的方法。
本发明实施例在灵活以太网FlexE结构中的一个灵活以太网组FlexE group中,选择至少一条以太网PHY传输同步信息,从而实现在灵活以太网传输同步信息。需要说明的是,FlexE group指的是由若干条以太网PHY绑定起来所形成的一个组。
参见图2,其示出了本发明实施例提供的一种传输同步信息的方法,该方法应用于灵活以太网的发送端,该方法可以包括:
S201:发送端从灵活以太网组FlexE group中选取至少一条用于传送同步信息的以太网物理层链路PHY;
S202:发送端将同步信息按照预设的封装策略进行封装后,插入选中的以太网PHY开销中的同步信息存储区;
S203:发送端通过所述选中的以太网PHY发送所述同步信息。
对于图2所示的方法,需要说明的是,该方法可以应用于图1所示的灵活以太网的通用结构,可以理解地,发送端则是图1中所示的路由器A。
示例性地,图2所示的方法还可以包括:
所述发送端在选中的以太网PHY开销中设置同步标记;其中,所述同步标记用于标示所述同步标记所在的以太网PHY中承载有同步信息;
相应地,所述发送端通过所述选中的以太网PHY发送所述同步信息时,所述方法还包括:
所述发送端通过所述选中的以太网PHY发送所述同步标记。
可选地,所述发送端在选中的以太网PHY开销中设置同步标记之前,所述方法还包括:
发送端从FlexE开销中保留字节中划分出同步信息存储区和同步标志位中至少一个;其中,所述同步标志位用于标示所述同步标记。
在具体实现过程中,所述发送端可以从FlexE开销第二行的保留字节中划分出大小为预设的第一字节长度的同步标志位以及大小为预设的第二字节长度的同步信息存储区;也就是说,所述选中的以太网PHY每个开销帧只传送第一字节长度的同步标志位以及第二字节长度个数的同步信息字节。
而且所述同步标志位和所述同步信息存储区内的值可以进行默认值设置,比如默认值为零。
详细来说,FlexE开销的结构如图3所示,路由器A可以从FlexE开销的第二行的保留字节中分出两块区域,其中一块为同步标志位,大小为1个字节;而另一个为同步信息存储区,大小为3个字节,这两块区域的默认值为全0,划分之后所得到的新的FlexE开销如图4所示。
可选地,所述发送端在选中的以太网PHY开销中设置同步标记,包括:所述发送端将所述选中的以太网PHY开销中的同步标志位设置为1。
可以理解地,其他未选中的以太网PHY开销中的同步标志位不作任何操作。
需要说明的是,除了通过同步标记来标示承载有同步信息的以太网PHY之外,发送端还可以通过网络系统预先设定或者发送端与接收端预设协商一致的用于承载同步信息的以太网PHY标识来选取用于传输同步信息的以太网PHY。从而使得接收端可以通过以太网PHY的标识以及预先设定或协商
一致的以太网PHY标识来确定用于承载同步信息的以太网PHY。
可选地,所述发送端将所述同步信息按照预设的封装策略进行封装后,插入选中的以太网PHY开销中的同步信息存储区,包括:
发送端将所述同步信息按照基于帧的通用成帧规程GFP-F进行封装;
以及,发送端将封装后的同步信息插入到所述选中的以太网PHY开销中的同步信息存储区。
可以理解地,其他未选中的以太网PHY开销中的同步信息存储区不作任何操作。
示例性地,所述同步信息包括精确时间协议PTP报文;可选地,所述PTP报文的产生周期满足时钟时间同步要求。
可选地,所述PTP报文的产生周期满足时钟时间同步要求与FlexE开销复帧的周期一致;相应地,所述发送端通过所述选中的以太网PHY发送所述同步信息,包括:
通过所述选中的以太网PHY中的N个FlexE开销帧发送一个完整的PTP报文。在本实施例中,N可以为32。
相应地,PTP报文的产生周期与FlexE开销复帧的周期一致,即每32个FlexE开销帧产生一次PTP报文。
可以理解地,上述过程可以应用于图1所示的灵活以太网的通用结构,在该通用结构中,传输网络仅由路由器网元设备组成,因此可以称为纯灵活以太网网络。
本实施例提供的一种传输同步信息的方法,在灵活以太网FlexE结构中的一个灵活以太网组FlexE group中,选择至少一条以太网PHY传输同步信息,从而实现在灵活以太网传输同步信息。
上述实施例针对的是纯灵活以太网网络;而对于灵活以太网网络跨越非以太网网络,在本实施例中,非以太网网络以光传送网(OTN,Optical Transport Network)为例,即FlexE over OTN的网络环境下,还需要在OTN网络的出口将OTN网络的时间差作用于整个传输网络。参见图5所示的FlexE over OTN结构,本实施例提供了一种传输同步信息的方法,参见图6,
所述方法包括:
S601:发送端从灵活以太网组FlexE group中选取至少一条用于传输同步信息的以太网物理层链路PHY;
S602:发送端将原始同步信息按照预设的封装策略进行封装后,插入选中的以太网PHY开销中的同步信息存储区;
S603:发送端通过选中的以太网PHY发送所述原始同步信息至OTN网络出口端;
S604:OTN网络出口端确定所述选中的以太网PHY;
S605:OTN网络出口端从所述选中的以太网PHY中解封装得到原始同步信息;
S606:OTN网络出口端根据所述OTN网络时间差更新所述原始同步信息,获得更新后的同步信息;
S607:OTN网络出口端将所述更新后的同步信息按照所述预设的封装策略进行封装后,插入所述选中的以太网PHY开销中的同步信息存储区;
S608:OTN网络出口端通过所述选中的以太网PHY发送所述更新后的同步信息。
需要说明的是,本实施例中,步骤S601至S603与前述实施例中的步骤S201至S203相同,本实施例对此不做赘述。
示例性地,图6所示的方法还可以包括:
发送端在所述选中的以太网PHY开销中设置同步标记;其中,所述同步标记用于标示所述同步标记所在的以太网PHY中承载有同步信息;
相应地,对于步骤S604所述的OTN网络出口端确定所述选中的以太网PHY,可以包括:所述OTN网络出口端解析以太网PHY的所述同步标记确定所述选中的以太网PHY;
相应地,在执行步骤S608所述的OTN网络出口端通过所述选中的以太网PHY发送所述更新后的同步信息时,所述方法可以还包括:OTN网络出口端通过所述选中的以太网PHY发送所述同步标记。
可选地,所述发送端在选中的以太网PHY开销中设置同步标记之前,所述方法还包括:
发送端从FlexE开销中保留字节中划分出同步信息存储区和同步标志位中至少一个;其中,所述同步标志位用于标示所述同步标记。
具体进行划分和设置的过程如图2所述实施例所述,本实施例对此不做赘述。
可选地,所述发送端在选中的以太网PHY开销中设置同步标记,包括:所述发送端将所述选中的以太网PHY开销中的同步标志位设置为1。
可以理解地,其他未选中的以太网PHY开销中的同步标志位不作任何操作。
需要说明的是,除了通过同步标记来标示承载有同步信息的以太网PHY之外,发送端还可以通过网络系统预先设定或者发送端与接收端预设协商一致的用于承载同步信息的以太网PHY标识来选取用于传输同步信息的以太网PHY。从而使得接收端可以通过以太网PHY的标识以及预先设定或协商一致的以太网PHY标识来确定用于承载同步信息的以太网PHY。
可选地,所述发送端将所述同步信息按照预设的封装策略进行封装后,插入选中的以太网PHY开销中的同步信息存储区,包括:
发送端将所述同步信息按照基于帧的通用成帧规程GFP-F进行封装;
以及,发送端将封装后的同步信息插入到所述选中的以太网PHY开销中的同步信息存储区。
可以理解地,其他未选中的以太网PHY开销中的同步信息存储区不作任何操作
示例性地,所述同步信息包括精确时间协议PTP报文;可选地,所述PTP报文的产生周期满足时钟时间同步要求。
上述示例的具体实现过程如前述实施例所述,本实施例对此不做赘述。
图2所述的实施例针对的是纯灵活以太网网络;图6所述的实施例针对的是灵活以太网网络跨越非以太网网络,其中,非以太网网络以光传送网(OTN,Optical Transport Network)为例,即FlexE over OTN的网络环境下,
还需要在OTN网络的出口将OTN网络的时间差作用于整个传输网络。
本实施例仍然以图5所示的FlexE over OTN结构为例,本发明实施提供了一种传输同步信息的方法,参见图7,所述方法包括:
S701:发送端从灵活以太网组FlexE group中选取至少一条用于传输同步信息的以太网物理层链路PHY;
S702:发送端将原始同步信息按照预设的封装策略进行封装后,插入选中的以太网PHY开销中的同步信息存储区;
S703:发送端通过所述选中的以太网PHY发送所述原始同步信息至OTN网络出口端;
S704:OTN网络出口端确定所述选中的以太网PHY;
S705:OTN网络出口端将所述OTN网络时间差按照所述预设的封装策略进行封装后,插入所述选中的以太网PHY开销中的管理通道;
S706:OTN网络出口端通过所述选中的以太网PHY发送所述原始同步信息和所述OTN网络时间差。
需要说明的是,本实施例中,步骤S701至S703与图2所述实施例中的步骤S201至S203相同,本实施例对此不做赘述。
示例性地,图7所示的方法还可以包括:
发送端在所述选中的以太网PHY开销中设置同步标记;其中,所述同步标记用于标示所述同步标记所在的以太网PHY中承载有同步信息;
相应地,对于步骤S704所述的OTN网络出口端确定所述选中的以太网PHY,可以包括:所述OTN网络出口端解析以太网PHY的所述同步标记确定所述选中的以太网PHY;
相应地,在执行步骤S706所述的OTN网络出口端通过所述选中的以太网PHY发送所述原始同步信息和所述OTN网络时间差时,所述方法可以还包括:OTN网络出口端通过所述选中的以太网PHY发送所述同步标记。
可选地,所述发送端在选中的以太网PHY开销中设置同步标记之前,所述方法还包括:
发送端从FlexE开销中保留字节中划分出同步信息存储区和同步标志位中至少一个;其中,所述同步标志位用于标示所述同步标记。
具体进行划分和设置的过程如图2所述实施例所述,本实施例对此不做赘述。
可选地,所述发送端在选中的以太网PHY开销中设置同步标记,包括:所述发送端将所述选中的以太网PHY开销中的同步标志位设置为1。
可以理解地,其他未选中的以太网PHY开销中的同步标志位不作任何操作。
需要说明的是,除了通过同步标记来标示承载有同步信息的以太网PHY之外,发送端还可以通过网络系统预先设定或者发送端与接收端预设协商一致的用于承载同步信息的以太网PHY标识来选取用于传输同步信息的以太网PHY。从而使得接收端可以通过以太网PHY的标识以及预先设定或协商一致的以太网PHY标识来确定用于承载同步信息的以太网PHY。
可选地,所述发送端将所述同步信息按照预设的封装策略进行封装后,插入选中的以太网PHY开销中的同步信息存储区,包括:
发送端将所述同步信息按照基于帧的通用成帧规程GFP-F进行封装;
以及,发送端将封装后的同步信息插入到所述选中的以太网PHY开销中的同步信息存储区。
可以理解地,其他未选中的以太网PHY开销中的同步信息存储区不作任何操作
示例性地,所述同步信息包括精确时间协议PTP报文;可选地,所述PTP报文的产生周期满足时钟时间同步要求。
上述示例的具体实现过程如图2所述实施例所述,本实施例对此不做赘述。
参见图8,其示出了本发明实施例提供的一种传输同步信息的方法,该方法应用于图1所示的纯灵活以太网的接收端,因此,本实施例所述的方法针对的接收端对应于图2所述实施例中所述的发射端,所述方法包括:
S801:接收端从灵活以太网组FlexE group中检测用于传输同步信息的
以太网PHY;
S802:接收端从用于传输同步信息的以太网PHY开销中的同步信息存储区解析得到封装后的同步信息;
S803:接收端通过预设的解封装策略从封装后的同步信息中获取所述同步信息;
S804:接收端根据所述同步信息进行时间同步。
示例性地,用于传输同步信息的以太网PHY开销中还包括:同步标记;其中,所述同步标记用于标示所述同步标记所在的以太网PHY中承载有同步信息;因此,所述以太网PHY开销中可以包括同步标志位和同步信息存储区;其中,所述同步标志位和所述同步信息存储区内的值默认设置为0;
相应地,所述同步标记为以太网PHY开销中的同步标志位设置为1。
可选的,增加有同步标记为和同步信息存储区之后的以太网PHY开销结构可以如图4所示,本实施例不做赘述。
相应地,对于步骤S801所述的接收端从灵活以太网组FlexE group中检测用于传输同步信息的以太网物理层链路PHY,包括:
所述接收端从FlexE group中通过检测以太网PHY中的同步标记确定所述用于传输同步信息的以太网PHY。
需要说明的是,根据前述实施例所述,除了通过同步标记来标示承载有同步信息的以太网PHY之外,发送端还可以通过网络系统预先设定或者发送端与接收端预设协商一致的用于承载同步信息的以太网PHY标识来选取用于传输同步信息的以太网PHY;因此,接收端可以通过以太网PHY的标识以及预先设定或协商一致的以太网PHY标识来确定用于承载同步信息的以太网PHY。
示例性地,所述同步信息包括精确时间协议PTP报文。
示例性地,所述封装后的同步信息为按照基于帧的通用成帧规程GFP-F进行封装后的同步信息;
相应地,所述接收端通过预设的解封装策略从封装后的同步信息中获取原始同步信息,包括:
所述接收端将所述封装后的同步信息按照GFP-F进行解封装,得到原始同步信息。
本实施例提供的一种发送端侧传输同步信息的方法,接收端通过从FlexE group中解析获取用于传输同步信号的以太网PHY,并从中获取同步信息进行同步从而实现了在灵活以太网结构下传输同步信息。
图8所述实施例针对图1中所示的路由器B;而对于灵活以太网网络跨越非以太网网络,以光传送网(OTN,Optical Transport Network)为例,即FlexE over OTN的网络环境下,还需要在OTN网络的出口将OTN网络的时间差作用于整个传输网络。参见图9,其示出了本发明实施例提供的一种传输同步信息的方法,而本实施例针对的接收端对应于图6所述实施例所述的发射端,因此,针对图5中所示的接收端即路由器B,所述方法包括:
S901:接收端从灵活以太网组FlexE group中检测用于传输同步信息的以太网物理层链路PHY;
S902:接收端从用于传输同步信息的以太网PHY开销中获取由所述OTN网络出口端更新后的同步信息;
S903:接收端根据由所述OTN网络出口端更新后的同步信息进行时间同步。
示例性地,用于传输同步信息的以太网PHY开销中还包括:同步标记;其中,所述同步标记用于标示所述同步标记所在的以太网PHY中承载有同步信息;因此,所述以太网PHY开销中可以包括同步标志位和同步信息存储区;其中,所述同步标志位和所述同步信息存储区内的值默认设置为0;
相应地,所述同步标记为以太网PHY开销中的同步标志位设置为1。
可选的,增加有同步标记为和同步信息存储区之后的以太网PHY开销结构可以如图4所示,本实施例不做赘述。
相应地,对于步骤S901所述的接收端从灵活以太网组FlexE group中检测用于传输同步信息的以太网物理层链路PHY,包括:
所述接收端从FlexE group中通过检测以太网PHY中的同步标记确定所述用于传输同步信息的以太网PHY。
需要说明的是,根据前述实施例所述,除了通过同步标记来标示承载有同步信息的以太网PHY之外,发送端还可以通过网络系统预先设定或者发送端与接收端预设协商一致的用于承载同步信息的以太网PHY标识来选取用于传输同步信息的以太网PHY;因此,接收端可以通过以太网PHY的标识以及预先设定或协商一致的以太网PHY标识来确定用于承载同步信息的以太网PHY。
示例性地,所述同步信息包括精确时间协议PTP报文。
示例性地,所述封装后的同步信息为按照基于帧的通用成帧规程GFP-F进行封装后的同步信息;
相应地,所述接收端通过预设的解封装策略从封装后的同步信息中获取原始同步信息,包括:
所述接收端将所述封装后的同步信息按照GFP-F进行解封装,得到原始同步信息。
可以理解地,本实施例与图6所述实施例对应。
图8所述实施例针对图1中所示的路由器B;而对于灵活以太网网络跨越非以太网网络,以光传送网(OTN,Optical Transport Network)为例,即FlexE over OTN的网络环境下,还需要在OTN网络的出口将OTN网络的时间差作用于整个传输网络。参见图10,其示出了本发明实施例提供的一种传输同步信息的方法,而本实施例针对的接收端对应于图7所述实施例的发射端,因此,针对图5中所示的接收端即路由器B,所述方法包括:
S1001:接收端从灵活以太网组FlexE group中检测用于传输同步信息的以太网物理层链路PHY;
S1002:接收端从所述用于传输同步信息的以太网PHY开销中获取原始同步信息和OTN网络时间差;
S1003:接收端根据原始同步信息和OTN网络时间差进行时间同步。
示例性地,用于传输同步信息的以太网PHY开销中还包括:同步标记;其中,所述同步标记用于标示所述同步标记所在的以太网PHY中承载有同步信息;因此,所述以太网PHY开销中可以包括同步标志位和同步信息存
储区;其中,所述同步标志位和所述同步信息存储区内的值默认设置为0;
相应地,所述同步标记为以太网PHY开销中的同步标志位设置为1。
可选的,增加有同步标记为和同步信息存储区之后的以太网PHY开销结构可以如图4所示,本实施例不做赘述。
相应地,对于步骤S1001所述的接收端从灵活以太网组FlexE group中检测用于传输同步信息的以太网物理层链路PHY,包括:
所述接收端从FlexE group中通过检测以太网PHY中的同步标记确定所述用于传输同步信息的以太网PHY。
需要说明的是,根据前述实施例所述,除了通过同步标记来标示承载有同步信息的以太网PHY之外,发送端还可以通过网络系统预先设定或者发送端与接收端预设协商一致的用于承载同步信息的以太网PHY标识来选取用于传输同步信息的以太网PHY;因此,接收端可以通过以太网PHY的标识以及预先设定或协商一致的以太网PHY标识来确定用于承载同步信息的以太网PHY。
示例性地,所述同步信息包括精确时间协议PTP报文。
示例性地,所述封装后的同步信息为按照基于帧的通用成帧规程GFP-F进行封装后的同步信息;
相应地,所述接收端通过预设的解封装策略从封装后的同步信息中获取原始同步信息,包括:
所述接收端将所述封装后的同步信息按照GFP-F进行解封装,得到原始同步信息。
可以理解地,本实施例与图7所述实施例对应。
需要说明的是,综合上述实施例,本发明实施例还提供了一种传输同步信息的方法,该方法应用于发送端和接收端,所述方法包括:
发送端从灵活以太网组FlexE group中选取至少一条用于传输同步信息的以太网物理层链路PHY;
所述发送端将所述同步信息按照预设的封装策略进行封装后,插入选中
的以太网PHY开销中的同步信息存储区;
所述发送端通过所述选中的以太网PHY向接收端发送所述同步信息;
所述接收端从灵活以太网组FlexE group中检测用于传输同步信息的以太网物理层链路PHY;
所述接收端从用于传输同步信息的以太网PHY开销中的同步信息存储区解析得到封装后的同步信息;
所述接收端通过预设的解封装策略从封装后的同步信息中获取所述同步信息;
所述接收端根据所述同步信息进行时间同步。
下面通过三个应用示例对上述实施例进行说明。
应用示例一
本应用示例以图1所示的两个路由器组成的纯灵活以太网为应用场景,设定一个400G的客户业务需要从路由器A传送到路由器B,每条以太网PHY的速率为100G,因此400G业务可以分4条以太网PHY承载,这里的FlexE group中包括了4条以太网PHY,同步信息为PTP报文。参见图11,可以包括:
S1101:路由器A从4条以太网PHY中任意选择一条以太网PHY用来承载PTP报文。
S1102:路由器A从FlexE开销第二行的保留字节中分出两块区域,其中一块为同步标志位,大小为1个字节;另一块为同步信息存储区,大小为3个字节。
可选地,划分后的FlexE开销结构如图4所示,这两块区域的默认值为全0。
S1103:路由器A将选中的用来传送PTP报文的以太网PHY开销中的同步标志位全部置1,对于未选中的以太网PHY则不做操作。
S1104:路由器A将PTP报文采用GFP-F封装,插入到选中的用来传送PTP报文的以太网PHY开销的同步信息存储区,对于未选中的以太网PHY
则不做操作。
PTP报文的产生周期与FlexE开销复帧的周期一致,即每32个FlexE开销帧产生一次PTP报文。
S1105:路由器B通过检测每条以太网PHY开销中的同步标志位,用来确认承载了PTP报文的以太网PHY。
S1106:路由器B检测出承载PTP报文的以太网PHY后,从该以太网PHY开销中的同步信息存储区中解析出GFP-F封装后的PTP报文,进行GFP-F解封装恢复出原始的PTP报文,随后根据这个PTP报文进行时间同步。
可以理解地,本应用示例中的路由器A对应于图2所述实施例中的发送端;路由器B对应于图8所述实施例中的接收端。
应用示例二
本应用示例以图5所示的FlexE over OTN为应用场景,设定一个300G的客户业务要从路由器A传送到路由器B,每条以太网PHY的速率为100G,分4条以太网PHY承载,每条PHY中包含5个不可用时隙,这5个不可用时隙在OTN网络的入口去掉,在OTN网络的出口回插,同步信息为PTP报文。具体参见图12,可以包括:
S1201:路由器A从4条以太网PHY中任意选择一条以太网PHY用来承载PTP报文。
S1202:路由器A从FlexE开销第二行的保留字节中分出两块区域,其中一块为同步标志位,大小为1个字节;另一块为同步信息存储区,大小为3个字节。
可选地,划分后的FlexE开销结构如图4所示,这两块区域的默认值为全0。
S1203:路由器A将选中的用来传送PTP报文的以太网PHY开销中的同步标志位全部置1,对于未选中的以太网PHY则不做操作。
S1204:路由器A将PTP报文采用GFP-F封装,插入到选中的用来传送PTP报文的以太网PHY开销的同步信息存储区,对于未选中的以太网PHY则不做操作。
需要说明的是,完整的PTP报文采用与FlexE相同的开销复帧方式发送,即通过32个FlexE开销帧传送一个完整的PTP报文,PTP报文的产生周期与FlexE开销复帧的周期一致,即每32个FlexE开销帧产生一次PTP报文。
S1205:OTN网络的出口端检测每条以太网PHY的同步标志位,确定承载PTP报文的以太网PHY,从这条以太网PHY开销中的同步信息存储区中解析出GFP-F封装后的PTP报文,进行GFP-F解封装操作恢复出原始的PTP报文。
S1206:OTN网络的出口端将得到的原始PTP报文信息与OTN网络的时间差进行计算之后的结果进行GFP-F封装,插入到对应以太网PHY开销中的同步信息存储区,然后发送出去。
需要说明的是,OTN网络的时间差可通过OTN的OSMC开销获得。
S1207:路由器B通过检测每条以太网PHY中的同步标志位,确认承载了PTP报文的以太网PHY。
S1208:路由器B检测出承载PTP报文的以太网PHY后,从对应的以太网PHY开销中的同步信息存储区中解析出GFP-F封装后的PTP报文,进行GFP-F解封装恢复出原始的PTP报文,然后根据这个PTP报文进行时间同步。
可以理解地,本应用示例中的路由器A对应于图6所述实施例中的发送端和OTN网络出口端;路由器B对应于图9所述实施例中的接收端。
应用示例三
本应用示例仍然以图5所示的FlexE over OTN为应用场景,设定一个150G的客户业务要从路由器A传送到路由器B,每条以太网PHY的速率为100G,分2条以太网PHY承载,每条PHY中包含5个不可用时隙,这5个不可用时隙在OTN网络的入口去掉,在OTN网络的出口回插,同步信息为PTP报文。参见图13,可以包括:
S1301:路由器A从2条以太网PHY中任意选择一条以太网PHY用来承载PTP报文。
S1302:路由器A从FlexE开销第二行的保留字节中分出两块区域,其中一块为同步标志位,大小为1个字节;另一块为同步信息存储区,大小为
3个字节。
可选地,划分后的FlexE开销结构如图4所示,这两块区域的默认值为全0。
S1303:路由器A将选中的用来传送PTP报文的以太网PHY开销中的同步标志位全部置1,对于未选中的以太网PHY则不做操作。
S1304:路由器A将PTP报文采用GFP-F封装,插入到选中的用来传送PTP报文的以太网PHY开销的同步信息存储区,对于未选中的以太网PHY则不做操作。
需要说明的是,完整的PTP报文采用与FlexE相同的开销复帧方式发送,即通过32个FlexE开销帧传送一个完整的PTP报文,PTP报文的产生周期与FlexE开销复帧的周期一致,即每32个FlexE开销帧产生一次PTP报文。
S1305:OTN网络的出口端检测每条以太网PHY的同步标志位,确定承载PTP报文的以太网PHY。
S1306:OTN网络的出口端通过OTN的OSMC开销计算获得OTN网络的时间差,将OTN网络的时间差信息进行GFP-F封装,将封装后的时间差信息插入到承载了PTP报文的以太网PHY开销中的段层管理通道中。
S1307:路由器B通过检测每条以太网PHY中的同步标志位,确认承载了PTP报文的以太网PHY。
S1308:路由器B检测出承载PTP报文的以太网PHY后,从对应的以太网PHY开销中的同步信息存储区中解析出GFP-F封装后的PTP报文,从该PHY开销中段层管理通道中解析出GFP-F封装后的OTN网络的时间差信息,对这两个信息进行GFP-F解封装恢复出原始的PTP报文和OTN网络时间差,然后根据这两个原始信息进行时间同步。
可以理解地,本应用示例中的路由器A对应于图7所述实施例中的发送端和OTN网络出口端;路由器B对应于图10所述实施例中的接收端。
通过上述三个应用示例,从三个应用场景对前述实施例进行了说明,从中可以看出,本发明实施例在灵活以太网FlexE结构中的一个灵活以太网组FlexE group中,选择至少一条以太网PHY传输同步信息,从而实现在灵活
以太网传输同步信息。
参见图14,其示出了本发明实施例提供的一种第一发送端140,所述第一发送端140包括:第一选取模块1401、第一插入模块1402和第一发送模块1403;其中,
所述第一选取模块1401,设置为从灵活以太网组FlexE group中选取至少一条用于传送同步信息的以太网物理层链路PHY;
所述第一插入模块1402,设置为将所述同步信息按照预设的封装策略进行封装后,插入选中的以太网PHY开销中的同步信息存储区;
所述第一发送模块1403,设置为通过所述选中的以太网PHY发送所述同步信息。
在上述方案中,参见图15,所述第一发送端140还包括第一设置模块1404,设置为在所述选中的以太网PHY开销中设置同步标记;其中,所述同步标记用于标示所述同步标记所在的以太网PHY中承载有同步信息。
在上述方案中,参见图15,所述第一发送端140还包括:第一划分模块1405,设置为从FlexE开销中保留字节中划分出同步信息存储区和同步标志位中至少一个;其中,所述同步标志位用于标示所述同步标记。
在上述方案中,所述第一插入模块1402,是设置为将所述同步信息按照基于帧的通用成帧规程GFP-F进行封装;
以及,将封装后的同步信息插入到所述选中的以太网PHY开销中的同步信息存储区。
在上述方案中,所述同步信息包括精确时间协议PTP报文。
在上述方案中,所述PTP报文的产生周期满足时钟时间同步要求。
参见图16,其示出了本发明实施例提供的一种第二发送端160,所述第二发送端160包括:第二选取模块1601、第二插入模块1602、第二发送模块1603和第一光传送网OTN网络出口端1604;其中,
所述第二选取模块1601,设置为从灵活以太网组FlexE group中选取至少一条用于传输同步信息的以太网物理层链路PHY;
所述第二插入模块1602,设置为将原始同步信息按照预设的封装策略进行封装后,插入选中的以太网PHY开销中的同步信息存储区;
所述第二发送模块1603,设置为通过所述选中的以太网PHY发送所述原始同步信息至所述第一OTN网络出口端;
所述第一OTN网络出口端1604,设置为确定所述选中的以太网PHY;
以及,从所述选中的以太网PHY中解封装得到原始同步信息;
以及,根据所述OTN网络时间差更新所述原始同步信息,获得更新后的同步信息;
以及,将所述更新后的同步信息按照所述预设的封装策略进行封装后,插入所述选中的以太网PHY开销中的同步信息存储区;
以及,通过所述选中的以太网PHY发送所述更新后的同步信息。
参见图17,其示出了本发明实施例提供的一种第三发送端170,所述第三发送端170可以包括:第三选取模块1701、第三插入模块1702、第三发送模块1703和第二光传送网OTN网络出口端1704;其中,
所述第三选取模块1701,设置为从灵活以太网组FlexE group中选取至少一条用于传输同步信息的以太网物理层链路PHY;
所述第三插入模块1702,设置为将原始同步信息按照预设的封装策略进行封装后,插入选中的以太网PHY开销中的同步信息存储区;
所述第三发送模块1703,设置为通过所述选中的以太网PHY发送所述原始同步信息至所述第二OTN网络出口端;
所述第二OTN网络出口端1704,设置为确定所述选中的以太网PHY;
以及,将所述OTN网络时间差按照所述预设的封装策略进行封装后,插入所述选中的以太网PHY开销中的管理通道;
以及,通过所述选中的以太网PHY发送所述原始同步信息和所述OTN网络时间差。
参见图18,其示出了本发明实施例提供的一种第一接收端180的结构,包括:第一检测模块1801、第一解析模块1802、第一解封装模块1803和第
一同步模块1804;其中,
所述第一检测模块1801,设置为从灵活以太网组FlexE group中检测用于传输同步信息的以太网物理层链路PHY;
所述第一解析模块1802,设置为从用于传输同步信息的以太网PHY开销中的同步信息存储区解析得到封装后的同步信息;
所述第一解封装模块1803,设置为通过预设的解封装策略从封装后的同步信息中获取所述同步信息;
所述第一同步模块1804,设置为根据所述同步信息进行时间同步。
在上述方案中,用于传输同步信息的以太网PHY开销中还包括:同步标记;其中,所述同步标记用于标示所述同步标记所在的以太网PHY中承载有同步信息。
相应地,第一检测模块1801,是设置为:
从FlexE group中通过检测以太网PHY中的同步标记确定所述用于传输同步信息的以太网PHY。
在上述方案中,所述同步信息包括精确时间协议PTP报文。
在上述方案中,所述封装后的同步信息为按照基于帧的通用成帧规程GFP-F进行封装后的同步信息;
相应地,所述第一解封装模块1803,是设置为:
将所述封装后的同步信息按照GFP-F进行解封装,得到原始同步信息。
参见图19,其示出了本发明实施例提供的一种第二接收端190,所述第二接收端190可以包括:第二检测模块1901、第一获取模块1902和第二同步模块1903;其中,
所述第二检测模块1901,设置为从灵活以太网组FlexE group中检测用于传输同步信息的以太网物理层链路PHY;
所述第一获取模块1902,设置为从所述用于传输同步信息的以太网PHY开销中获取由所述OTN网络出口端更新后的同步信息;
所述第二同步模块1903,设置为根据由所述OTN网络出口端更新后的
同步信息进行时间同步。
参见图20,其示出了本发明实施例提供的一种第三接收端200,所述第三接收端200可以包括:第三检测模块2001、第二获取模块2002和第三同步模块2003;其中,
所述第三检测模块2001,设置为从灵活以太网组FlexE group中检测用于传输同步信息的以太网物理层链路PHY;
所述第二获取模块2002,设置为从所述用于传输同步信息的以太网PHY开销中获取原始同步信息和OTN网络时间差;
所述第三同步模块2003,设置为根据原始同步信息和所述OTN网络时间差进行时间同步。
参见图21,其示出了本发明实施例提供的一种传输同步信息的系统210,所述系统210包括:第一发送端140和第一接收端180;其中,
所述第一发送端140,设置为从灵活以太网组FlexE group中选取至少一条用于传送同步信息的以太网物理层链路PHY;
以及,将所述同步信息按照预设的封装策略进行封装后,插入选中的以太网PHY开销中的同步信息存储区;
以及,通过所述选中的以太网PHY发送所述同步信息;
所述第一接收端180,设置为从灵活以太网组FlexE group中检测用于传输同步信息的以太网物理层链路PHY;
以及,从用于传输同步信息的以太网PHY开销中的同步信息存储区解析得到封装后的同步信息;
以及,通过预设的解封装策略从封装后的同步信息中获取所述同步信息;
以及,根据所述同步信息进行时间同步。
参见图22,其示出了本发明实施例提供的一种传输同步信息的系统220,所述系统220包括:第二发送端160和第二接收端190;其中,
所述第二发送端160,设置为从灵活以太网组FlexE group中选取至少一
条用于传输同步信息的以太网物理层链路PHY;
以及,将原始同步信息按照预设的封装策略进行封装后,插入选中的以太网PHY开销中的同步信息存储区;
以及,通过所述选中的以太网PHY发送所述原始同步信息至所述第一OTN网络出口端;
所述第一OTN网络出口端1604,设置为确定所述选中的以太网PHY;
以及,从所述选中的以太网PHY中解封装得到原始同步信息;
以及,根据所述OTN网络时间差更新所述原始同步信息,获得更新后的同步信息;
以及,将所述更新后的同步信息按照所述预设的封装策略进行封装后,插入所述选中的以太网PHY开销中的同步信息存储区;
以及,通过所述选中的以太网PHY发送所述更新后的同步信息;
所述第二接收端190,设置为从灵活以太网组FlexE group中检测用于传输同步信息的以太网物理层链路PHY;
以及,从所述用于传输同步信息的以太网PHY开销中获取由所述OTN网络出口端更新后的同步信息和OTN网络时间差;
以及,根据由所述OTN网络出口端更新后的同步信息进行时间同步。
参见图23,其示出了本发明实施例提供的一种传输同步信息的系统230,所述系统230包括:第三发送端170和第三接收端200;其中,
所述第三发送端170,设置为从灵活以太网组FlexE group中选取至少一条用于传输同步信息的以太网物理层链路PHY;
以及,将原始同步信息按照预设的封装策略进行封装后,插入选中的以太网PHY开销中的同步信息存储区;
以及,通过所述选中的以太网PHY发送所述原始同步信息至所述第二OTN网络出口端1704;
所述第二OTN网络出口端1704,设置为确定所述选中的以太网PHY;
以及,将所述OTN网络时间差按照所述预设的封装策略进行封装后,
插入所述选中的以太网PHY开销中的管理通道;
以及,通过所述选中的以太网PHY发送所述原始同步信息和所述OTN网络时间差;
所述第三接收端200,设置为从灵活以太网组FlexE group中检测用于传输同步信息的以太网物理层链路PHY;
以及,从所述用于传输同步信息的以太网PHY开销中获取原始同步信息和OTN网络时间差;
以及,根据原始同步信息和所述OTN网络时间差进行时间同步。
本领域普通技术人员可以理解,上文中所公开方法中的全部或某些步骤、系统、装置中的功能模块/单元可以被实施为软件、固件、硬件及其适当的组合。在硬件实施方式中,在以上描述中提及的功能模块/单元之间的划分不一定对应于物理单元的划分;例如,一个物理组件可以具有多个功能,或者一个功能或步骤可以由若干物理组件合作执行。某些组件或所有组件可以被实施为由处理器,如数字信号处理器或微处理器执行的软件,或者被实施为硬件,或者被实施为集成电路,如专用集成电路。这样的软件可以分布在计算机可读介质上,计算机可读介质可以包括计算机存储介质(或非暂时性介质)和通信介质(或暂时性介质)。如本领域普通技术人员公知的,术语计算机存储介质包括用于存储信息(诸如计算机可读指令、数据结构、程序模块或其他数据)的任何方法或技术中实施的易失性和非易失性、可移除和不可移除介质。计算机存储介质包括但不限于RAM、ROM、EEPROM、闪存或其他存储器技术、CD-ROM、数字多功能盘(DVD)或其他光盘存储、磁盒、磁带、磁盘存储或其他磁存储装置、或者可以用于存储期望的信息并且可以被计算机访问的任何其他的介质。此外,本领域技术人员公知的是,通信介质通常包含计算机可读指令、数据结构、程序模块或者诸如载波或其他传输机制之类的调制数据信号中的其他数据,并且可包括任何信息递送介质。
以上所述,仅为本发明的可选实施例而已,并非用于限定本发明的保护范围。
实现了在灵活以太网传输同步信息。
Claims (39)
- 一种传输同步信息的方法,所述方法包括:发送端从灵活以太网组FlexE group中选取至少一条用于传输同步信息的以太网物理层链路PHY(S201);所述发送端将所述同步信息按照预设的封装策略进行封装后,插入选中的以太网PHY开销中的同步信息存储区(S202);所述发送端通过所述选中的以太网PHY发送所述同步信息(S203)。
- 根据权利要求1所述的方法,所述方法还包括:所述发送端在所述选中的以太网PHY开销中设置同步标记;其中,所述同步标记用于标示所述同步标记所在的以太网PHY中承载有同步信息;相应地,所述方法还包括:所述发送端通过所述选中的以太网PHY发送所述同步信息时,所述发送端通过所述选中的以太网PHY发送所述同步标记。
- 根据权利要求2所述的方法,所述方法还包括:所述发送端从FlexE开销中保留字节中划分出同步信息存储区和同步标志位中至少一个;其中,所述同步标志位用于标示所述同步标记。
- 根据权利要求2所述的方法,其中,所述发送端从FlexE开销中保留字节中划分出同步信息存储区和同步标志位中至少一个,包括:所述发送端从FlexE开销的保留字节中划分出大小为预设的第一字节长度的同步标志位以及大小为预设的第二字节长度的同步信息存储区。
- 根据权利要求1所述的方法,其中,所述发送端将所述同步信息按照预设的封装策略进行封装后,插入选中的以太网PHY开销中的同步信息存储区,包括:所述发送端将所述同步信息按照基于帧的通用成帧规程GFP-F进行封装;所述发送端将封装后的同步信息插入到所述选中的以太网PHY开销中的同步信息存储区。
- 根据权利要求1所述的方法,其中,所述同步信息包括精确时间协议PTP报文。
- 根据权利要求5所述的方法,其中,所述PTP报文的产生周期满足时钟时间同步要求。
- 根据权利要求6所述的方法,其中,所述发送端通过所述选中的以太网PHY发送所述同步信息,包括:通过所述选中的以太网PHY中的N个FlexE开销帧发送一个完整的PTP报文,N为正整数。
- 一种传输同步信息的方法,所述方法包括:发送端从灵活以太网组FlexE group中选取至少一条用于传输同步信息的以太网物理层链路PHY(S601);所述发送端将原始同步信息按照预设的封装策略进行封装后,插入选中的以太网PHY开销中的同步信息存储区(S602);所述发送端通过所述选中的以太网PHY发送所述原始同步信息至光传送网OTN网络出口端(S603);所述OTN网络出口端确定所述选中的以太网PHY(S604);所述OTN网络出口端从所述选中的以太网PHY中解封装得到原始同步信息(S605);所述OTN网络出口端根据所述OTN网络时间差更新所述原始同步信息,获得更新后的同步信息(S606);所述OTN网络出口端将所述更新后的同步信息按照所述预设的封装策略进行封装后,插入所述选中的以太网PHY开销中的同步信息存储区(S607);所述OTN网络出口端通过所述选中的以太网PHY发送所述更新后的同步信息(S608)。
- 根据权利要求9所述的方法,所述方法还包括:所述发送端在所述选中的以太网PHY开销中设置同步标记;其中,所 述同步标记用于标示所述同步标记所在的以太网PHY中承载有同步信息;相应地,所述OTN网络出口端确定所述选中的以太网PHY,包括:所述OTN网络出口端解析以太网PHY的所述同步标记确定所述选中的以太网PHY;相应地,所述方法还包括:所述OTN网络出口端通过所述选中的以太网PHY发送所述更新后的同步信息时,所述OTN网络出口端通过所述选中的以太网PHY发送所述同步标记。
- 根据权利要求10所述的方法,所述方法还包括:所述发送端从FlexE开销中保留字节中划分出同步信息存储区和同步标志位中至少一个;其中,所述同步标志位用于标示所述同步标记。
- 根据权利要求9所述的方法,其中,所述发送端将所述同步信息按照预设的封装策略进行封装后,插入选中的以太网PHY开销中的同步信息存储区,包括:所述发送端将所述同步信息按照基于帧的通用成帧规程GFP-F进行封装;所述发送端将封装后的同步信息插入到所述选中的以太网PHY开销中的同步信息存储区。
- 根据权利要求9所述的方法,其中,所述同步信息包括精确时间协议PTP报文。
- 根据权利要求13所述的方法,其中,所述PTP报文的产生周期满足时钟时间同步要求。
- 一种传输同步信息的方法,所述方法包括:发送端从灵活以太网组FlexE group中选取至少一条用于传输同步信息的以太网物理层链路PHY(S701);所述发送端将原始同步信息按照预设的封装策略进行封装后,插入选中的以太网PHY开销中的同步信息存储区(S702);所述发送端通过所述选中的以太网PHY发送所述原始同步信息至光传 送网OTN网络出口端(S703);所述OTN网络出口端确定所述选中的以太网PHY(S704);所述OTN网络出口端将所述OTN网络时间差按照所述预设的封装策略进行封装后,插入所述选中的以太网PHY开销中的管理通道(S705);所述OTN网络出口端通过所述选中的以太网PHY发送所述原始同步信息和所述OTN网络时间差(S706)。
- 根据权利要求15所述的方法,所述方法还包括:所述发送端在所述选中的以太网PHY开销中设置同步标记;其中,所述同步标记用于标示所述同步标记所在的以太网PHY中承载有同步信息;相应地,所述OTN网络出口端确定所述选中的以太网PHY,包括:所述OTN网络出口端解析以太网PHY的所述同步标记确定所述选中的以太网PHY;相应地,所述方法还包括:所述OTN网络出口端通过所述选中的以太网PHY发送所述原始同步信息和所述OTN网络时间差时,所述OTN网络出口端通过所述选中的以太网PHY发送所述同步标记。
- 根据权利要求16所述的方法,所述方法还包括:所述发送端从FlexE开销中保留字节中划分出同步信息存储区和同步标志位中至少一个;其中,所述同步标志位用于标示所述同步标记。
- 根据权利要求15所述的方法,其中,所述发送端将所述同步信息按照预设的封装策略进行封装后,插入选中的以太网PHY开销中的同步信息存储区,包括:所述发送端将所述同步信息按照基于帧的通用成帧规程GFP-F进行封装;所述发送端将封装后的同步信息插入到所述选中的以太网PHY开销中的同步信息存储区。
- 一种传输同步信息的方法,所述方法包括:接收端从灵活以太网组FlexE group中检测用于传输同步信息的以太网 物理层链路PHY(S801);所述接收端从用于传输同步信息的以太网PHY开销中的同步信息存储区解析得到封装后的同步信息(S802);所述接收端通过预设的解封装策略从封装后的同步信息中获取所述同步信息(S803);所述接收端根据所述同步信息进行时间同步(S804)。
- 根据权利要求19所述的方法,用于传输同步信息的以太网PHY开销中还包括:同步标记;其中,所述同步标记用于标示所述同步标记所在的以太网PHY中承载有同步信息;相应地,所述接收端从灵活以太网组FlexE group中检测用于传输同步信息的以太网物理层链路PHY,包括:所述接收端从FlexE group中通过检测以太网PHY中的同步标记确定所述用于传输同步信息的以太网PHY。
- 根据权利要求19所述的方法,其中,所述同步信息包括精确时间协议PTP报文。
- 根据权利要求19所述的方法,其中,所述封装后的同步信息为按照基于帧的通用成帧规程GFP-F进行封装后的同步信息;相应地,所述接收端通过预设的解封装策略从封装后的同步信息中获取原始同步信息,包括:所述接收端将所述封装后的同步信息按照GFP-F进行解封装,得到原始同步信息。
- 一种传输同步信息的方法,所述方法包括:接收端从灵活以太网组FlexE group中检测用于传输同步信息的以太网物理层链路PHY(S901);所述接收端从所述用于传输同步信息的以太网PHY开销中获取由光传送网OTN网络出口端更新后的同步信息(S902);所述接收端根据由所述OTN网络出口端更新后的同步信息进行时间同 步(S903)。
- 一种传输同步信息的方法,所述方法包括:接收端从灵活以太网组FlexE group中检测用于传输同步信息的以太网物理层链路PHY(S1001);所述接收端从所述用于传输同步信息的以太网PHY开销中获取原始同步信息和光传送网OTN网络时间差(S1002);所述接收端根据原始同步信息和所述OTN网络时间差进行时间同步(S1003)。
- 一种传输同步信息的方法,所述方法包括:发送端从灵活以太网组FlexE group中选取至少一条用于传输同步信息的以太网物理层链路PHY(S201);所述发送端将所述同步信息按照预设的封装策略进行封装后,插入选中的以太网PHY开销中的同步信息存储区(S202);所述发送端通过所述选中的以太网PHY向接收端发送所述同步信息(S203);所述接收端从灵活以太网组FlexE group中检测用于传输同步信息的以太网物理层链路PHY(S801);所述接收端从用于传输同步信息的以太网PHY开销中的同步信息存储区解析得到封装后的同步信息(S802);所述接收端通过预设的解封装策略从封装后的同步信息中获取所述同步信息(S803);所述接收端根据所述同步信息进行时间同步(S804)。
- 一种第一发送端(140),所述第一发送端(140)包括:第一选取模块(1401)、第一插入模块(1402)和第一发送模块(1403);其中,所述第一选取模块(1401),设置为从灵活以太网组FlexE group中选取至少一条用于传送同步信息的以太网物理层链路PHY;所述第一插入模块(1402),设置为将所述同步信息按照预设的封装策 略进行封装后,插入选中的以太网PHY开销中的同步信息存储区;所述第一发送模块(1403),设置为通过所述选中的以太网PHY发送所述同步信息。
- 根据权利要求26所述的第一发送端(140),所述第一发送端(140)还包括:第一设置模块(1404),设置为在所述选中的以太网PHY开销中设置同步标记;其中,所述同步标记用于标示所述同步标记所在的以太网PHY中承载有同步信息。
- 根据权利要求27所述的第一发送端(140),所述第一发送端(140)还包括:第一划分模块(1405),设置为从FlexE开销中保留字节中划分出同步信息存储区和同步标志位中至少一个;其中,所述同步标志位用于标示所述同步标记。
- 根据权利要求26所述的第一发送端(140),其中,所述第一插入模块(1402),是设置为将所述同步信息按照基于帧的通用成帧规程GFP-F进行封装;以及,将封装后的同步信息插入到所述选中的以太网PHY开销中的同步信息存储区。
- 一种第二发送端(160),所述第二发送端(160)包括:第二选取模块(1601)、第二插入模块(1602)、第二发送模块(1603)和第一光传送网OTN网络出口端(1604);其中,所述第二选取模块(1601),设置为从灵活以太网组FlexE group中选取至少一条用于传输同步信息的以太网物理层链路PHY;所述第二插入模块(1602),设置为将原始同步信息按照预设的封装策略进行封装后,插入选中的以太网PHY开销中的同步信息存储区;所述第二发送模块(1603),设置为通过所述选中的以太网PHY发送所述原始同步信息至所述第一OTN网络出口端(1604);所述第一OTN网络出口端(1604),设置为确定所述选中的以太网PHY;以及,从所述选中的以太网PHY中解封装得到原始同步信息;以及,根据所述OTN网络时间差更新所述原始同步信息,获得更新后的同步信息;以及,将所述更新后的同步信息按照所述预设的封装策略进行封装后,插入所述选中的以太网PHY开销中的同步信息存储区;以及,通过所述选中的以太网PHY发送所述更新后的同步信息。
- 一种第三发送端(170),所述第三发送端(170)包括:第三选取模块(1701)、第三插入模块(1702)、第三发送模块(1703)和第二光传送网OTN网络出口端(1704);其中,所述第三选取模块(1701),设置为从灵活以太网组FlexE group中选取至少一条用于传输同步信息的以太网物理层链路PHY;所述第三插入模块(1702),设置为将原始同步信息按照预设的封装策略进行封装后,插入选中的以太网PHY开销中的同步信息存储区;所述第三发送模块(1703),设置为通过所述选中的以太网PHY发送所述原始同步信息至所述第二OTN网络出口端(1704);所述第二OTN网络出口端(1704),设置为确定所述选中的以太网PHY;以及,将所述OTN网络时间差按照所述预设的封装策略进行封装后,插入所述选中的以太网PHY开销中的管理通道;以及,通过所述选中的以太网PHY发送所述原始同步信息和所述OTN网络时间差。
- 一种第一接收端(180),所述第一接收端(180)包括:第一检测模块(1801)、第一解析模块(1802)、第一解封装模块(1803)和第一同步模块(1804);其中,所述第一检测模块(1801),设置为从灵活以太网组FlexE group中检测用于传输同步信息的以太网物理层链路PHY;所述第一解析模块(1802),设置为从用于传输同步信息的以太网PHY开销中的同步信息存储区解析得到封装后的同步信息;所述第一解封装模块(1803),设置为通过预设的解封装策略从封装后的同步信息中获取所述同步信息;所述第一同步模块(1804),设置为根据所述同步信息进行时间同步。
- 根据权利要求32所述的第一接收端(180),用于传输同步信息的以太网PHY开销中还包括:同步标记;其中,所述同步标记用于标示所述同步标记所在的以太网PHY中承载有同步信息相应地,第一检测模块(1801)是设置为,从FlexE group中通过检测以太网PHY中的同步标记确定所述用于传输同步信息的以太网PHY。
- 根据权利要求33所述的第一接收端(180),其中,所述封装后的同步信息为按照基于帧的通用成帧规程GFP-F进行封装后的同步信息;相应地,所述第一解封装模块(1803)是设置为,将所述封装后的同步信息按照GFP-F进行解封装,得到原始同步信息。
- 一种第二接收端(190),所述第二接收端(190)包括:第二检测模块(1901)、第一获取模块(1902)和第二同步模块(1903);其中,所述第二检测模块(1901),设置为从灵活以太网组FlexE group中检测用于传输同步信息的以太网物理层链路PHY;所述第一获取模块(1902),设置为从所述用于传输同步信息的以太网PHY开销中获取由光传送网OTN网络出口端更新后的同步信息;所述第二同步模块(1903),设置为根据由所述OTN网络出口端更新后的同步信息进行时间同步。
- 一种第三接收端(200),所述第三接收端(200)包括:第三检测模块(2001)、第二获取模块(2002)和第三同步模块(2003);其中,所述第三检测模块(2001),设置为从灵活以太网组FlexE group中检测用于传输同步信息的以太网物理层链路PHY;所述第二获取模块(2002),设置为从所述用于传输同步信息的以太网PHY开销中获取原始同步信息和光传送网OTN网络时间差;所述第三同步模块(2003),设置为根据原始同步信息和所述OTN网 络时间差进行时间同步。
- 一种传输同步信息的系统(210),所述系统包括:第一发送端(140)和第一接收端(180);其中,所述第一发送端(140),设置为从灵活以太网组FlexE group中选取至少一条用于传送同步信息的以太网物理层链路PHY;以及,将所述同步信息按照预设的封装策略进行封装后,插入选中的以太网PHY开销中的同步信息存储区;以及,通过所述选中的以太网PHY发送所述同步信息;所述第一接收端(180),设置为从灵活以太网组FlexE group中检测用于传输同步信息的以太网物理层链路PHY;以及,从设置为传输同步信息的以太网PHY开销中的同步信息存储区解析得到封装后的同步信息;以及,通过预设的解封装策略从封装后的同步信息中获取所述同步信息;以及,根据所述同步信息进行时间同步。
- 一种传输同步信息的系统(220),所述系统包括:第二发送端(160)和第二接收端(190);其中,所述第二发送端(160),设置为从灵活以太网组FlexE group中选取至少一条用于传输同步信息的以太网物理层链路PHY;以及,将原始同步信息按照预设的封装策略进行封装后,插入选中的以太网PHY开销中的同步信息存储区;以及,通过所述选中的以太网PHY发送所述原始同步信息至第一光传送网OTN网络出口端(1604);所述第一OTN网络出口端(1604),设置为确定所述选中的以太网PHY;以及,从所述选中的以太网PHY中解封装得到原始同步信息;以及,根据所述OTN网络时间差更新所述原始同步信息,获得更新后的同步信息;以及,将所述更新后的同步信息按照所述预设的封装策略进行封装后,插入所述选中的以太网PHY开销中的同步信息存储区;以及,通过所述选中的以太网PHY发送所述更新后的同步信息;所述第二接收端(190),设置为从灵活以太网组FlexE group中检测用于传输同步信息的以太网物理层链路PHY;以及,从所述用于传输同步信息的以太网PHY开销中获取由所述OTN网络出口端更新后的同步信息;以及,根据由所述OTN网络出口端更新后的同步信息进行时间同步。
- 一种传输同步信息的系统(230),所述系统(230)包括:第三发送端(170)和第三接收端(200);其中,所述第三发送端(170),设置为从灵活以太网组FlexE group中选取至少一条用于传输同步信息的以太网物理层链路PHY;以及,将原始同步信息按照预设的封装策略进行封装后,插入选中的以太网PHY开销中的同步信息存储区;以及,通过所述选中的以太网PHY发送所述原始同步信息至第二光传送网OTN网络出口端(1704);所述第二OTN网络出口端(1704),设置为确定所述选中的以太网PHY;以及,将所述OTN网络时间差按照所述预设的封装策略进行封装后,插入所述选中的以太网PHY开销中的管理通道;以及,通过所述选中的以太网PHY发送所述原始同步信息和所述OTN网络时间差;所述第三接收端(200),设置为从灵活以太网组FlexE group中检测用于传输同步信息的以太网物理层链路PHY;以及,从所述设置为传输同步信息的以太网PHY开销中获取原始同步信息和OTN网络时间差;以及,根据原始同步信息和所述OTN网络时间差进行时间同步。
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US20220247505A1 (en) * | 2019-12-23 | 2022-08-04 | Zte Corporation | Method and apparatus for configuring synchronisation information, network device, and storage medium |
Also Published As
Publication number | Publication date |
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EP3509245A4 (en) | 2019-09-11 |
CN107800528B (zh) | 2021-04-06 |
EP3509245A1 (en) | 2019-07-10 |
US20190199505A1 (en) | 2019-06-27 |
US10742389B2 (en) | 2020-08-11 |
EP3509245B1 (en) | 2024-07-10 |
CN107800528A (zh) | 2018-03-13 |
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