CN102355396A - Precision time protocol (PTP) port creation method and boundary clock device - Google Patents
Precision time protocol (PTP) port creation method and boundary clock device Download PDFInfo
- Publication number
- CN102355396A CN102355396A CN2011102056722A CN201110205672A CN102355396A CN 102355396 A CN102355396 A CN 102355396A CN 2011102056722 A CN2011102056722 A CN 2011102056722A CN 201110205672 A CN201110205672 A CN 201110205672A CN 102355396 A CN102355396 A CN 102355396A
- Authority
- CN
- China
- Prior art keywords
- equipment
- clock
- port
- ptp
- present
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Small-Scale Networks (AREA)
Abstract
The invention provides a precision time protocol (PTP) port creation method, a boundary clock (BC) device and an ordinary clock (OC) device, wherein the precision time protocol port creation method comprises the following steps: a plurality of physical ports of a present clock device are connected with a plurality of clock devices of a same virtual local area network (VLAN) with one-to-one correspondence, and the present clock device determines that when the clock devices need a same protocol state, the present clock device creates a PTP port according to an identification of the VLAN to which the clock devices belong. According to the above PTP port creation method, the boundary clock (BC) device and the ordinary clock (OC) device, the PTP port can be created flexibly and reasonably.
Description
Technical field
The present invention relates to the communication technology, relate in particular to a kind of creation method, boundary clock equipment and ordinary clock equipment of split-second precision protocol port.
Background technology
In the mobile retransmission network, clock synchronization is a kind of function that must support.The 1588v2 of IEEE-USA (IEEE) can realize the recovery of the phase place and the frequency of clock.There is following shortcoming in the deployment of IEEE 1588v2 in the mobile retransmission network: if all messages all send with the multicast mode, will certainly in the mobile retransmission network, take massive band width, influence the performance of whole network; And require to use multicast from (SLAVE) node at the clock end, simplify configuration.Therefore, can flexible configuration clock synchronization port be that (Precision Time Protocol, PTP) port are technical problems being badly in need of solution to the split-second precision agreement.
In the prior art, the PTP port is confirmed by physical port, and is as shown in Figure 1; (2 is transmission clock (TC) equipment to equipment 1,3,4 for Boundary clock, BC) equipment composition topology as boundary clock; Equipment 1 is connection device 3,4 on physical port 1; Have the same protocol state, particularly when all devices was launched peak delay mechanism (PEER DELAY MECHANISM), 1,2 circuits of equipment postponed mode meeting double counting delay size in using networking 1; Be protocol port on the minimizing equipment 1 and message amount, use physical port to be aggregated on the PTP port.
For equipment 1, equipment 1 is created the PTP port one, receives the protocol massages on the physical port 1, does not distinguish the message of Virtual Local Area Network 1, VLAN2; On equipment 3, create the PTP port one, send the message of VLAN1, on equipment 4, create the PTP port one, send the multicast message of VLAN2; PTP port protocol status on the minimizing equipment 1 calculates and message amount.
But for other situation, when for example 1 pair of equipment of equipment 3 needed the different protocol state with equipment 4, an existing unique physical port with equipment 1 was irrational as the PTP port; Again for example, if equipment 1 links to each other with equipment 3, equipment 4 through a physical port respectively, and 1 pair of equipment 3 of equipment is when needing identical protocol status with equipment 4, and two physical ports of employing equipment 1 are irrational as the PTP port.
Summary of the invention
The invention provides a kind of creation method, boundary clock equipment and ordinary clock equipment of split-second precision protocol port, dumb, irrational problem is set to solve existing P TP port.
The invention provides a kind of creation method of split-second precision protocol port, this method comprises:
A plurality of physical ports of present clock equipment link to each other with a plurality of clockworks that belong to same Virtual Local Area Network are corresponding one by one respectively; And when said present clock equipment confirmed that said a plurality of clockworks are needed identical protocol status, said present clock equipment was created the PTP port according to the Virtual Local Area Network sign of said a plurality of clockworks ownership.
Preferably, said present clock equipment is boundary clock (BC) equipment or ordinary clock (OC) equipment; Said clockwork is boundary clock (BC) equipment or ordinary clock (OC) equipment.
The present invention also provides the creation method of a kind of split-second precision agreement (PTP) port, and this method comprises:
Present clock equipment links to each other with a clockwork through a physical port; The VLAN sign and the said physical port of the said clockwork ownership that said present clock equipment basis links to each other with said present clock equipment, perhaps said VLAN sign is created the PTP port.
The present invention also provides the creation method of a kind of split-second precision agreement (PTP) port, and this method comprises:
Present clock equipment links to each other with a plurality of clockworks; And when said present clock equipment confirmed that said a plurality of clockworks are needed the different protocol state, said present clock equipment was according to the VLAN sign of said a plurality of clockworks ownership and the physical port establishment PTP port of said present clock equipment.
Preferably, said present clock equipment and a plurality of clockwork are boundary clock (BC) equipment.
Preferably, said present clock equipment links to each other with a plurality of clockworks and comprises:
Said present clock equipment links to each other with a plurality of clockworks through transmission clock (TC) equipment or synthetic (TC+OC) equipment of common transmission clock.
The present invention also provides a kind of boundary clock (BC) equipment, and this BC equipment links to each other with a plurality of BC equipment, and this BC equipment comprises:
Determination module is used for confirming whether said a plurality of BC equipment are needed identical protocol status;
First creates module; Be used for determining when said a plurality of BC equipment are needed identical protocol status at said determination module; Virtual Local Area Network sign according to said a plurality of BC equipment ownership is created the PTP port, and wherein said a plurality of BC equipment belong to same VLAN and link to each other with a plurality of physical ports of said BC equipment.
Preferably, said determination module also is used for confirming whether said a plurality of BC equipment are needed the different protocol state;
This BC equipment also comprises: second creates module; Be used for determining when said a plurality of BC equipment are needed the different protocol state at said determination module; Create the PTP port according to the VLAN sign of said a plurality of BC equipment ownership and the physical port of oneself; Wherein, said a plurality of BC equipment is to link to each other with said BC equipment through transmission clock (TC) equipment or synthetic (TC+OC) equipment of common transmission clock.
The present invention also provides a kind of ordinary clock (OC) equipment, and this OC equipment comprises:
Determination module is used for confirming whether a plurality of OC equipment that link to each other with a plurality of physical ports of said OC equipment and belong to same Virtual Local Area Network are needed identical protocol status;
First creates module, is used for determining when said a plurality of OC equipment are needed identical protocol status at said determination module, creates the PTP port according to the VLAN sign of said a plurality of OC equipment ownership.
Preferably, this OC equipment also comprises:
Second creates module, is used for the VLAN sign establishment PTP port of the OC equipment ownership that basis links to each other with a physical port of said OC equipment; Perhaps, create the PTP port according to said VLAN sign and said physical port.
The creation method of above-mentioned PTP port, BC clockwork and OC clockwork can neatly, reasonably be created the PTP port.
Description of drawings
Fig. 1 is the sketch map that existing P TP port is confirmed by physical port;
Fig. 2 is PTP port of the present invention is confirmed embodiment by VLAN a sketch map;
Fig. 3 is PTP port of the present invention is confirmed embodiment one jointly by VLAN and physical port a sketch map;
Fig. 4 is PTP port of the present invention is confirmed embodiment two jointly by VLAN and physical port a sketch map;
Fig. 5 is the structural representation of BC apparatus embodiments of the present invention;
Fig. 6 is the structural representation of OC apparatus embodiments of the present invention.
Embodiment
For making the object of the invention, technical scheme and advantage clearer, hereinafter will combine accompanying drawing that embodiments of the invention are elaborated.Need to prove that under the situation of not conflicting, embodiment among the application and the characteristic among the embodiment be combination in any each other.
IEEE Std 1588
TM-2008 agreements are to the not explanation of use of VLAN, and the main effect of VLAN is to divide broadcast domain, the forwarding of control broadcasting packet, and the embodiment of the invention provides a kind of VLAN of combination sign to confirm the method for PTP port.
The embodiment of the invention provides the creation method of a kind of split-second precision agreement (PTP) port, and this method comprises:
A plurality of physical ports of present clock equipment link to each other with a plurality of clockworks that belong to same Virtual Local Area Network are corresponding one by one respectively; And when said present clock equipment confirmed that said a plurality of clockworks are needed identical protocol status, said present clock equipment was created the PTP port according to the Virtual Local Area Network sign of said a plurality of clockworks ownership.
As shown in Figure 2; It is PTP port of the present invention is confirmed embodiment by VLAN sketch map; In this embodiment, equipment 1,2,3 is formed topology, and equipment 2 is connected on the different physical ports of equipment 1 with equipment 3; Equipment 2 all belongs to VLAN1 with equipment 3, and 1 pair of equipment of equipment 2 needs the same protocol state with equipment 3.
In this embodiment, the PTP port is confirmed that by the VLAN sign like Fig. 2, equipment 1 is created the PTP port one, receives the message on the VLAN1; Equipment 2 is created the PTP port one, sends the message of VLAN1; Equipment 3 is created the PTP port one, sends the message of VLAN1.Equipment 1 only need correspond on the agreement PTP port, and only there is a protocol status in two equipment, and the PTP port protocol status on the minimizing equipment 1 calculates.
Wherein, the said equipment can be BC equipment, also can be OC equipment etc.
If on some network topology; Physical port 1 belongs to the VLAN1 port with physical port 2, and the message that on the physical port 1 of equipment 1, sends receives from physical port 2; This situation can be introduced asymmetric delays; On disposing is unallowed, under the situation that does not obtain proofreading and correct, need abandon this message.
In addition, the present invention also provides a kind of creation method of PTP port, and this method comprises:
Present clock equipment links to each other with a clockwork through a physical port; The VLAN sign and the said physical port of the said clockwork ownership that said present clock equipment basis links to each other with said present clock equipment, perhaps said VLAN sign is created the PTP port.
IEEE Std 1588
TM-2008 have described split-second precision agreement (PTP) protocol port as empty port; Carry out broadcast multipoint and transmit the calculating of control (BMC) agreement; Use VLAN, physical port attribute to confirm to belong to the data flow of PTP protocol port, solve the following networking requirement that clockwork need be tackled in the real network:
As shown in Figure 3; It is PTP port of the present invention is confirmed embodiment jointly by VLAN and physical port sketch map; In this embodiment; Equipment 1,3,4 is formed topology as BC equipment, and equipment 2 is as transparent transmission equipment, and 1 pair of equipment 3 of equipment, equipment 4 need have different line delay size, protocol status; Here, protocol status represent master clock (MASTER), from clock (SLAVE) etc.
In this embodiment, the PTP port is confirmed by VLAN sign and physical port jointly, like Fig. 3; On equipment 1, create the PTP port one; Receive multicast protocol message on VLAN1, the physical port 1, create PTP port 2, receive multicast protocol message on VLAN2, the physical port 1; On equipment 3, create the PTP port one, send the message of VLAN1, on equipment 4, create the PTP port one, send the multicast message of VLAN2;
Certainly, in this embodiment, the equipment that links to each other with equipment 1 has only under the situation of two (being equipment 3 and equipment 4), and the PTP port of equipment 1 also can be confirmed according to the equipment 3 and the VLAN sign of equipment 4 ownership.
The line delay of difference computing equipment 1-equipment 3 and equipment 1-equipment 4, protocol status etc. on the PTP of equipment 1 port one, 2.
Owing to need two PTP ports on the equipment 1 in the present embodiment,, and can not be OC equipment so this equipment can be BC equipment.In addition, the said equipment 2 can also can be common transmission clock synthetic (Combined ordinary and transparent clock, TC+OC) equipment for TC equipment; When being TC+OC equipment, the port arrangement of TC also can be used VLAN, physical port; Or the VLAN+ physical port is implemented; Can utilize VLAN when wherein being MASTER, physical port, or VLAN+ physical port control multicast range of transmission.
But,, as shown in Figure 4 if in Fig. 3, increase a BC equipment 5; In this embodiment; Equipment 1 need be made master clock and to equipment 3 and 4 clock is provided, do again when clock slave unit 5 obtains clock, then this moment equipment 1 the PTP port can only confirm according to the VLAN+ physical port.
Further; The present invention also provides a kind of creation method of PTP port; This method comprises: present clock equipment links to each other with a clockwork through a physical port; The VLAN sign and the said physical port of the said clockwork ownership that said present clock equipment basis links to each other with said present clock equipment, perhaps said VLAN sign is created the PTP port.
Be that present clock equipment can be provided with the PTP port according to the physical port of oneself; Also can confirm the PTP port, can also confirm the PTP port according to the VLAN sign and the physical port of coupled clockwork ownership according to the VLAN sign of coupled clockwork ownership.
Because present clock equipment has only a PTP port, therefore, this equipment can be OC equipment.
Above-mentioned several kinds of modes can be supported on an equipment simultaneously, and flexible configuration is controlled different PTP circuits flexibly, to reach maximum performance and the requirement of simplifying configuration.
Need to prove; Confirm in the foregoing description that the PTP port is that equipment 1 is that example is described with present clock equipment; The PTP port is set for other equipment such as equipment 3, equipment 4 etc. with also can adopting the flexible method identical as required, no longer details here with equipment 1.
As shown in Figure 5, be the structural representation of BC apparatus embodiments of the present invention, this equipment comprises the determination module 51 and the first establishment module 52, wherein:
Determination module is used for confirming whether said a plurality of BC equipment are needed identical protocol status;
First creates module; Be used for determining when said a plurality of BC equipment are needed identical protocol status at said determination module; Virtual Local Area Network sign according to said a plurality of BC equipment ownership is created the PTP port, and wherein said a plurality of BC equipment belong to same VLAN and link to each other with a plurality of physical ports of said BC equipment.
In addition, said determination module also is used for confirming whether said a plurality of BC equipment are needed the different protocol state; Said BC equipment can also comprise:
Second creates module; Be used for determining when said a plurality of BC equipment are needed the different protocol state at said determination module; Create the PTP port according to the VLAN sign of said a plurality of BC equipment ownership and the physical port of oneself; Wherein, said a plurality of BC equipment is to link to each other with said BC equipment through transmission clock (TC) equipment or synthetic (TC+OC) equipment of common transmission clock.
Above-mentioned BC equipment can be confirmed the PTP port neatly, and deterministic process can repeat no more referring to Fig. 2-4 here.
As shown in Figure 6, be the structural representation of OC apparatus embodiments of the present invention, this equipment comprises the determination module 61 and the first establishment module 62, wherein:
Determination module is used for confirming whether a plurality of OC equipment that link to each other with a plurality of physical ports of said OC equipment and belong to same Virtual Local Area Network are needed identical protocol status;
First creates module, is used for determining when said a plurality of OC equipment are needed identical protocol status at said determination module, creates the PTP port according to the VLAN sign of said a plurality of OC equipment ownership.
In addition, said OC equipment also comprises:
Second creates module, is used for the VLAN sign establishment PTP port of the OC equipment ownership that basis links to each other with a physical port of said OC equipment; Perhaps, create the PTP port according to said VLAN sign and said physical port.
Above-mentioned OC equipment can be confirmed the PTP port neatly, and deterministic process can repeat no more referring to Fig. 2 here.
One of ordinary skill in the art will appreciate that all or part of step in the said method can instruct related hardware to accomplish through program, said procedure can be stored in the computer-readable recording medium, like read-only memory, disk or CD etc.Alternatively, all or part of step of the foregoing description also can use one or more integrated circuits to realize.Correspondingly, each the module/unit in the foregoing description can adopt the form of hardware to realize, also can adopt the form of software function module to realize.The present invention is not restricted to the combination of the hardware and software of any particular form.
Above embodiment is only unrestricted in order to technical scheme of the present invention to be described, only with reference to preferred embodiment the present invention is specified.Those of ordinary skill in the art should be appreciated that and can make amendment or be equal to replacement technical scheme of the present invention, and do not break away from the spirit and the scope of technical scheme of the present invention, all should be encompassed in the middle of the claim scope of the present invention.
Claims (10)
1. the creation method of a split-second precision agreement (PTP) port, this method comprises:
A plurality of physical ports of present clock equipment link to each other with a plurality of clockworks that belong to same Virtual Local Area Network are corresponding one by one respectively; And when said present clock equipment confirmed that said a plurality of clockworks are needed identical protocol status, said present clock equipment was created the PTP port according to the Virtual Local Area Network sign of said a plurality of clockworks ownership.
2. method according to claim 1 is characterized in that:
Said present clock equipment is boundary clock (BC) equipment or ordinary clock (OC) equipment; Said clockwork is boundary clock (BC) equipment or ordinary clock (OC) equipment.
3. the creation method of a split-second precision agreement (PTP) port, this method comprises:
Present clock equipment links to each other with a clockwork through a physical port; The VLAN sign and the said physical port of the said clockwork ownership that said present clock equipment basis links to each other with said present clock equipment, perhaps said VLAN sign is created the PTP port.
4. the creation method of a split-second precision agreement (PTP) port, this method comprises:
Present clock equipment links to each other with a plurality of clockworks; And when said present clock equipment confirmed that said a plurality of clockworks are needed the different protocol state, said present clock equipment was according to the VLAN sign of said a plurality of clockworks ownership and the physical port establishment PTP port of said present clock equipment.
5. method according to claim 4 is characterized in that:
Said present clock equipment and a plurality of clockwork are boundary clock (BC) equipment.
6. according to claim 4 or 5 described methods, it is characterized in that:
Said present clock equipment links to each other with a plurality of clockworks and comprises:
Said present clock equipment links to each other with a plurality of clockworks through transmission clock (TC) equipment or synthetic (TC+OC) equipment of common transmission clock.
7. a boundary clock (BC) equipment, this BC equipment links to each other with a plurality of BC equipment, and this BC equipment comprises:
Determination module is used for confirming whether said a plurality of BC equipment are needed identical protocol status;
First creates module; Be used for determining when said a plurality of BC equipment are needed identical protocol status at said determination module; Virtual Local Area Network sign according to said a plurality of BC equipment ownership is created the PTP port, and wherein said a plurality of BC equipment belong to same VLAN and link to each other with a plurality of physical ports of said BC equipment.
8. BC equipment according to claim 7 is characterized in that:
Said determination module also is used for confirming whether said a plurality of BC equipment are needed the different protocol state;
This BC equipment also comprises:
Second creates module; Be used for determining when said a plurality of BC equipment are needed the different protocol state at said determination module; Create the PTP port according to the VLAN sign of said a plurality of BC equipment ownership and the physical port of oneself; Wherein, said a plurality of BC equipment is to link to each other with said BC equipment through transmission clock (TC) equipment or synthetic (TC+OC) equipment of common transmission clock.
9. an ordinary clock (OC) equipment, this OC equipment comprises:
Determination module is used for confirming whether a plurality of OC equipment that link to each other with a plurality of physical ports of said OC equipment and belong to same Virtual Local Area Network are needed identical protocol status;
First creates module, is used for determining when said a plurality of OC equipment are needed identical protocol status at said determination module, creates the PTP port according to the VLAN sign of said a plurality of OC equipment ownership.
10. OC equipment according to claim 9 is characterized in that, this OC equipment also comprises:
Second creates module, is used for the VLAN sign establishment PTP port of the OC equipment ownership that basis links to each other with a physical port of said OC equipment; Perhaps, create the PTP port according to said VLAN sign and said physical port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110205672.2A CN102355396B (en) | 2011-07-21 | 2011-07-21 | The creation method of split-second precision protocol port, boundary clock equipment and ordinary clock equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110205672.2A CN102355396B (en) | 2011-07-21 | 2011-07-21 | The creation method of split-second precision protocol port, boundary clock equipment and ordinary clock equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102355396A true CN102355396A (en) | 2012-02-15 |
| CN102355396B CN102355396B (en) | 2017-03-15 |
Family
ID=45578893
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110205672.2A Expired - Fee Related CN102355396B (en) | 2011-07-21 | 2011-07-21 | The creation method of split-second precision protocol port, boundary clock equipment and ordinary clock equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102355396B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103051407A (en) * | 2012-12-06 | 2013-04-17 | 华为技术有限公司 | Clock protection method and system and related ordinary clock (OC) equipment |
| CN104284258A (en) * | 2013-07-12 | 2015-01-14 | 上海贝尔股份有限公司 | Method and device for configuring ONU in PON as IEEE1588 master clock |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101873243A (en) * | 2010-06-21 | 2010-10-27 | 中兴通讯股份有限公司 | Method and device for realizing coordinated time synchronization of 1588 message |
| CN101938318A (en) * | 2010-09-15 | 2011-01-05 | 中兴通讯股份有限公司 | Synchronous method, system and convergent ring device among devices in convergent network |
-
2011
- 2011-07-21 CN CN201110205672.2A patent/CN102355396B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101873243A (en) * | 2010-06-21 | 2010-10-27 | 中兴通讯股份有限公司 | Method and device for realizing coordinated time synchronization of 1588 message |
| CN101938318A (en) * | 2010-09-15 | 2011-01-05 | 中兴通讯股份有限公司 | Synchronous method, system and convergent ring device among devices in convergent network |
Non-Patent Citations (1)
| Title |
|---|
| 陈志列: "PTP精密时间同步协议的实现方法与应用", 《自动化技术与应用》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103051407A (en) * | 2012-12-06 | 2013-04-17 | 华为技术有限公司 | Clock protection method and system and related ordinary clock (OC) equipment |
| CN103051407B (en) * | 2012-12-06 | 2015-07-22 | 华为技术有限公司 | Clock protection method and system and related ordinary clock (OC) equipment |
| CN104284258A (en) * | 2013-07-12 | 2015-01-14 | 上海贝尔股份有限公司 | Method and device for configuring ONU in PON as IEEE1588 master clock |
| CN104284258B (en) * | 2013-07-12 | 2017-10-27 | 上海贝尔股份有限公司 | ONU is configured in pon as the method and apparatus of IEEE1588 master clocks |
| US10171227B2 (en) | 2013-07-12 | 2019-01-01 | Alcatel Lucent | Method and apparatus for configuring ONU as IEEE 1588 master clock in PON |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102355396B (en) | 2017-03-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103916950B (en) | Method for synchronizing time and system | |
| US9270395B2 (en) | Method for robust PTP synchronization with default 1588V2 profile | |
| CN101820435B (en) | Synchronization method and device for MAC (Media Access Control) address table information of distributed network processing system | |
| CN101616163B (en) | Method and device for processing precise time transfer protocol message | |
| WO2017157170A1 (en) | Method of updating clock synchronization topology, method of determining clock synchronization path, and apparatus | |
| CN101170373A (en) | Clock synchronization realization method for loop network | |
| WO2012068844A1 (en) | Method and system for synchronizing clock of master-slave clock devices | |
| CN103166750A (en) | Clock time synchronous resource distribution method and device | |
| US20130336117A1 (en) | Distributed processing scheme to support ieee 1588 ptp over multiple ports spanning a lag | |
| WO2015131350A1 (en) | Clock synchronization method and device, and communication system | |
| CN102215112B (en) | Method applied to FCoE (Fiber Channel over Ethernet) networking and used for optimizing FSPE (Fiber Shortest Path First) protocol and switchboards | |
| US20210083788A1 (en) | Simplified synchronized ethernet implementation | |
| JP6437587B2 (en) | Method, system, and apparatus for synchronizing clocks | |
| CN102342051B (en) | For coming the method for synchronised clock and relevant system and module by separating transmission first and second data via at least one time distribution protocol | |
| CN102355396A (en) | Precision time protocol (PTP) port creation method and boundary clock device | |
| US20230199683A1 (en) | Clock synchronization mode indication method and communication apparatus | |
| CN102158412B (en) | Transmission method and system of synchronous state information in Ethernet synchronization | |
| CN113810297B (en) | Multi-network converged train network system and communication method thereof | |
| KR20120051632A (en) | Method for clock synchronization in distributed system having ring topology and apparatus for the same | |
| JP2016535950A (en) | Port status synchronization method, related device, and system | |
| WO2016184129A1 (en) | Method, device and network apparatus for realizing unicast-based time synchronization | |
| CN107800583B (en) | Message transmission method and device | |
| CN117579210A (en) | Message processing method, network device, message processing system and storage medium | |
| CN104601495A (en) | Physical port expansion system | |
| CN116915352A (en) | Method for synchronizing system clock time and PTP hardware clock time simultaneously based on gPTP |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170315 Termination date: 20200721 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |