CN1617509A - Managig method for network clock - Google Patents
Managig method for network clock Download PDFInfo
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- CN1617509A CN1617509A CN 200310113984 CN200310113984A CN1617509A CN 1617509 A CN1617509 A CN 1617509A CN 200310113984 CN200310113984 CN 200310113984 CN 200310113984 A CN200310113984 A CN 200310113984A CN 1617509 A CN1617509 A CN 1617509A
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Abstract
This invention discloses a management method for network clock including: generating clock tracing relation and/or clock tracing state of network wide net cells based on the corresponding relation of clock source priority and link information of each single station net cells in network to set up a clock visual picture, which can upgrade the clock configuration, maintenance and upgrade to the sub-network mode from the single station mode and provides users an overall, real-time understand and grasp the mode of network wide clock tracing relation and state, convenient for network clock configuration, maintenance and upgrade.
Description
Technical field
The present invention relates to communication technical field, be specifically related to a kind of management method of network clocking.
Background technology
Existing SDH (SDH (Synchronous Digital Hierarchy)) transmits in the net, has two kinds of net methods of synchronization, i.e. principal and subordinate's method of synchronization and intersync mode.Principal and subordinate's method of synchronization is used the clock of a series of classifications, each grade clock all with its upper level clock synchronization, the whole network is set Primary reference clock.Intersync mode is controlled mutually by the clock of a plurality of switching nodes in the net, thereby all adjusts to the synchronous working that realizes the whole network on stable, the unified system frequency at last.Netting synchronous effect, is by clock tracing and synchronous, realizes that the clock frequency of all switching nodes in the net and phase place all are controlled in the range of tolerable variance of confirming in advance, so that whole digital streams of interior each switching node of net are realized correct effectively exchange.
The clock that SDH nets all network elements is the phase mutually synchronization all, and finally tracks to the timing base of digital synchronous network, as Primary reference clock.So any one SDH network element all might provide the timing reference benchmark.In the design and realization of existing network management system, can realize that clock tracing and net between the network element are synchronous by the clock source priority list of configuration network element (SDH equipment), but still neither one can overview the whole network clock synchronization tracking mode and the realization or the mode of clock synchronization tracking relationship, so that safeguard the SDH Synchronization Network.
The design of existing network management system and realizing can be by realizing the clock tracing and synchronously between the network element to network element configuration clock source, single station priority list.As the SDH synchronous driving network that contains a lot of network element devices for, can dispose its clock tracking relationship, thereby realize the clock synchronization of whole network element by craft, script, mode such as duplicate single station.Can understand the clock tracing state of network element by the current state of checking single station network element simultaneously, thereby reach the purpose of maintain synchronization net.
There is following shortcoming in this mode that disposes, administers and maintains with single station:
1, viewpoint is more single, can only see clock configuration, clock tracing relation and the clock tracing state at single station.
2, the clock tracing relation and the clock tracing state of understanding the whole network that can not be overall, real-time.
3, the whole network safeguard and the interface (non-graphical) of configuration unfriendly, be not easy to safeguard and configuration.
Summary of the invention
The objective of the invention is to overcome the above-mentioned shortcoming of prior art, a kind of implementation method of network clocking view is provided, with convenient configuration, maintenance and upgrading the whole network clock.Described method comprises step:
A, generate the clock tracing relation and/or the clock tracing state of the whole network network element according to the corresponding relation of the clock source priority of each single station network element in the described network and link information;
B, set up Clock view according to the clock tracing relation and/or the clock tracing state of the whole network network element of described generation.
Alternatively, described method also comprises step: the Clock view according to described foundation manages the whole network clock.
Preferably, described step a comprises:
C, obtain in the described network clock source priority list of each single station network element;
D, obtain in the described network that optical fiber between each single station network element connects or the configuration information of multiplex section link or regenerator section link;
E, according to the clock source priority list of described single station network element and the optical fiber between the network element of described single station connects or the configuration information of multiplex section link or regenerator section link, the clock source of setting up described single station network element is connected with optical fiber or the corresponding relation of multiplex section link or regenerator section link;
F, is connected with optical fiber or the corresponding relation of multiplex section link or regenerator section link, generates the stand clock tracing of network element of described list and concern according to the clock source of single station network element of described foundation;
G, successively to the whole network network element repeated execution of steps e to f, generate the clock tracing relation of the whole network network element.
Preferably, described step e comprises: the clock source priority list that travels through described each single station network element, if the light mouth has described optical fiber to connect or multiplex section link or regenerator section link under the described clock source, set up then that described clock source is connected with described optical fiber or the corresponding relation of multiplex section link or regenerator section link.
Alternatively, described step a also comprises: according to the clock tracing relation of the whole network network element of the present clock tracing source of single station network element and described generation, generate the clock tracing state of the whole network network element.
Alternatively, described according to single station network element the present clock tracing source and the clock tracing relation of the whole network network element of described generation, the step that generates the clock tracing state of the whole network network element comprises:
H, obtain the present clock tracing source of described single station network element;
The clock tracing relation of single station network element of i, the described generation of traversal, the clock tracing that obtains described present clock tracing source correspondence concerns;
J, the clock tracing of putting described present clock tracing source correspondence closes is the clock tracing state of described single station network element;
K, successively to the whole network network element repeated execution of steps h to step j, generate the clock tracing state of the whole network network element.
Alternatively, described step I comprises: the present clock tracing source for the single station network element that does not find corresponding clock tracing relation is set mark.
Preferably, described step b comprises: the clock tracing relation and the clock tracing state that show the whole network network element of described generation with visual figure and/or image.
Preferably, visual figure of described usefulness and/or image show that the clock tracing of the whole network network element of described generation concerns and the step of clock tracing state comprises:
Difference shows the state of described network clock source;
Difference shows the state of described clock tracing relation and clock tracing state.
Alternatively, described Clock view according to described foundation comprises the step that the whole network clock manages: the Clock view according to described foundation is configured, safeguards and upgrade the whole network clock.
Utilize the present invention, clock can be disposed, safeguards and upgrade and rise to the form of subnet from single station form, offer overall situation of user, real-time understanding and hold the mode of the whole network clock tracing relation and clock tracing state, be convenient to the whole network the clock configuration, safeguard and upgrading.And adopt visual graphic interface, make clock configuration, the maintenance of the whole network more friendly and easy-to-use with upgrading.
Description of drawings
Fig. 1 is the flow chart of step of the management method of the preferred embodiments of the present invention network clocking;
Fig. 2 is the detail flowchart of step that generates the clock tracing relation of the whole network network element in the inventive method shown in Figure 1 according to the clock source priority of each single station network element in the network;
Fig. 3 is the groove position and the optical fiber ios dhcp sample configuration IOS DHCP figure of two single station network elements;
Fig. 4, Fig. 5, Fig. 6, Fig. 7 are that the clock tracing of single station network element of generating of the configuration according to single station shown in Figure 3 network element closes the display result that ties up in the Clock view;
Mark exemplary plot in the Clock view that Fig. 8 is in the embodiments of the invention to be set up;
The schematic diagram of the Clock view that Fig. 9 is in the embodiments of the invention to be set up.
Embodiment
In order to make those skilled in the art person understand the present invention better, the present invention is described in further detail below in conjunction with drawings and embodiments.
With reference to Fig. 1, Fig. 1 is the flow chart of step of the management method of the preferred embodiments of the present invention network clocking.
At first, in step 101: the clock source priority of each single station network element generates the clock tracing relation of the whole network network element in according to network, and the detailed process of this step will describe with reference to Fig. 2 below;
Then, enter step 102: choose first single station network element in the network;
Step 103: the present clock tracing source of obtaining this list station network element;
Step 104: the clock tracing of this single station network element that traversal generates concerns, obtains the clock tracing relation of the present clock tracing source correspondence of this list station network element;
Step 105: it is the clock tracing state of this list station network element that the clock tracing of putting present clock tracing source correspondence closes;
Step 106: judge whether also have other network element in the network;
If have, then enter step 107: choose next single station network element in the network;
Then, repeating step 103 calculates the clock tracing state of next single station network element to step 105;
If no, then enter step 108: the clock tracing state that generates the whole network network element;
Then, enter step 109: clock tracing relation and clock tracing state according to the whole network network element of above-mentioned generation are set up Clock view, are specially: the clock tracing that shows the whole network network element of described generation with visual figure and/or image concerns and the clock tracing state.Concrete display mode will describe in detail with reference to Fig. 3 in the back.
Step 110: according to the Clock view of setting up this network clocking is managed, comprising: the configuration of clock, maintenance and upgrading.
With reference to Fig. 2, Fig. 2 describes the realization flow of above-mentioned step 101 shown in Figure 1 in detail.Step 101 mainly is to connect or multiplex section link or regenerator section link according to the clock source priority list of single station network element configuration in the network and the optical fiber that list is stood between the network element according to the process of the clock tracing relation of clock source priority generation the whole network network element of each single network element of standing in the network, calculate the clock tracing relation of single station network element one by one, and then obtain the clock tracing relation of the whole network network element.Below this flow process being carried out substep describes:
Step 201: the clock source priority list that obtains each single station network element in the network;
Step 202: obtain in the network that optical fiber between each single station network element connects or the configuration information of multiplex section link or regenerator section link;
Step 203: choose first single station network element in the network;
Step 204: be connected with optical fiber between other network element or the configuration information of multiplex section link or regenerator section link according to the clock source priority list of this single station network element and this single station network element, set up this list and stand that the clock source of network element is connected with optical fiber or the corresponding relation of multiplex section link or regenerator section link;
Step 205: is connected with optical fiber or the corresponding relation of multiplex section link or regenerator section link generates the stand clock tracing of network element of this list and concerns according to the clock source of this list station network element of above-mentioned foundation;
Step 206: judge whether also have other network element in the network;
If have, then enter step 207: choose next single station network element in the network; Then, repeating step 204 calculates the clock tracing relation of next single station network element to step 205;
If no, then enter step 208: the clock tracing relation that generates the whole network network element.
In order to make those skilled in the art person understand said process better, below by for example the present invention being done some more intuitive explanation.
The generative process of the clock tracing relation of the whole network network element is described at first by way of example:
Groove position and the optical fiber of supposing single station network element A and B dispose as shown in Figure 3.Wherein, 1, the 2 groove positions of single station network element A have been installed a two optical interface board SD1 respectively, it can provide two-way clock source, uses A-1-SD1-1, A-1-SD1-2 (1 groove position) and A-2-SD1-1, A-2-SD1-2 (2 groove position) to represent the clock source that each light mouth provides respectively.1, the 2 groove positions configuration of single station network element B is identical with network element A, and the two-way clock source that it provides is used B-1-SD1-1, B-1-SD1-2 (1 groove position) and B-2-SD1-1, B-2-SD1-2 (2 groove position) expression respectively.There is optical fiber to connect between the 1 groove position of network element A and network element B, and 2 light mouths of the SD1 veneer of the 1 groove position of 1 light mouth of the SD1 veneer of the 1 groove position of network element A connection network element B, represent with Fiber-A-11-B-12; 1 light mouth of the SD1 veneer of the 1 groove position of the 2 light mouths connection network element B of the SD1 veneer of the 1 groove position of network element A is represented with Fiber-A-12-B-11.The multiplex section link of two optical fiber correspondences represents with MSTrail-A-11-B-12 and MSTrail-A-12-B-11 that respectively the regenerator section link is represented with RSTrail-A-11-B-12 and RSTrail-A-12-B-11 respectively.The 2 groove position non-fiber of network element A connect.
If be provided with the clock source priority list of network element A this moment: A-1-SD1-1, A-2-SD1-1, internal clock source; The clock source priority list that network element B is set is: B-1-SD1-1, internal clock source.
The clock source priority list that traversal is analyzed network element A is connected with optical fiber or multiplex section link or regenerator section link:
For clock source A-1-SD1-1, can find a optical fiber to connect Fiber-A-11-B-12 or multiplex section link MSTrail-A-11-B-12 or regenerator section link RSTrail-A-11-B-12 corresponding to light mouth under this clock source, thereby be that this clock source of network element A generates the clock tracing relation between network element A, the B, the expression in Clock view as shown in Figure 4.
For clock source A-2-SD1-1, can't find optical fiber to connect or multiplex section link or regenerator section link, so this clock source does not generate corresponding clock tracing relation corresponding to light mouth under this clock source.Available special mark (as disconnected fine line source) expression on Clock view, the expression in Clock view as shown in Figure 5.
Traveled through all clock tracing relations that generate network element A behind the clock source priority list of network element A, the expression in Clock view as shown in Figure 6.
Equally, be connected with optical fiber or multiplex section link or regenerator section list of link are done similar traversal processing for the clock source priority list of network element B, can generate the clock tracing relation of network element B, the expression in Clock view as shown in Figure 7.
According to above algorithm, generate the clock tracing relation of the whole network network element.
Then, also to be presented in the Clock view, finish the calculating and the demonstration of the clock tracing relation of the whole network network element according to predetermined display mode.
Continue to continue to use the configuration of above-mentioned single station network element A and network element B below, illustrate the generative process of the clock tracing state of the whole network network element:
It is A-1-SD1-1 that network element A reports current tracing source, and the clock tracing relation that traversal network element A has generated finds the clock tracing of this clock source correspondence to concern, putting this clock tracing pass is the unique clock tracing state of network element A.
It is internal clock source that network element B reports current tracing source, the clock tracing relation that traversal network element B has generated, do not find the clock tracing relation of internal clock source correspondence, set mark for the current tracing source of the single station network element that does not find corresponding clock tracing relation.Then, be presented on the Clock view with special icon is special.As: internal clock source icon, external clock reference icon, disconnected fine line clock source icon, tributary clock sources icon or the like.
Described clock source is including but not limited to following clock source:
Internal clock source: the SDH network element clock of G.813 advising the location.
External clock reference: by the clock source of BITS access device, as PRC (Primary reference clock).
Line clock source: from the clock signal of SDH.
Tributary clock sources: from the clock signal of PDH (PDH (Pseudo-synchronous Digital Hierarchy)).
According to above algorithm, generate the clock tracing state of the whole network network element.
Then, also to be presented in the Clock view, finish the calculating and the demonstration of the clock tracing state of the whole network network element according to predetermined display mode.For example: can adopt mark shown in Figure 8 to show and transmit the network equipment, clock source, clock tracing relation, clock tracing state etc.
For a close friend, visual administration interface are provided to the user, need the clock tracing relation and the tracking mode of the top the whole network network element that has generated are presented in the Clock view.Described Clock view promptly is visual figure and/or the image of setting up according to the clock tracing relation and the clock tracing state of the whole network network element of described generation.The following display mode of main employing among the figure:
(1) with different icons (for example: A, B, C ...) show and transmit the network equipment, internal clock source, external clock reference, circuit tributary clock sources, and the state in difference clock source (disconnected fine, normal etc.).
As shown in Figure 8: A represents that a kind of transmission network equipment (network element), B represent that external clock, C represent that branch road synchronisation source, D represent not connect the source, E represents inner synchronisation source or the like.
(2) with the clock tracing line of different colours (F, G ...) show clock tracing state, clock tracing relation between the network element of single station, and distinguish the state (, disconnected fine, unusual etc.) of clock tracing state, clock tracing relation as normally;
As shown in Figure 8: blue F represents to transmit the normal tracking relationship link of the network equipment, green G represents to transmit the normal tracking relationship link of the network equipment, unusual tracking link of red expression transmission network element device or the like.
(3) with mode sign Clock view elements such as other colors and icons, so that easy-to-use interface to be provided.
Adopt above-mentioned display mode, can offer user's Clock view as shown in Figure 9.
Utilize this Clock view, the user is understood in real time and hold the clock tracing relation and the clock tracing state of the whole network, be beneficial to configuration, maintenance and the upgrading of the whole network clock.
For example: can be configured, safeguard and upgrade the whole network clock in the following manner:
In Clock view, can directly carry out the clock configuration of network element, for example: by right button configurable clock generator source priority list, configurable clock generator source quality etc.Configuration back is by generating clock tracing relation and clock tracing state, but the correctness of verification clock configuration data, whether have clock mutually with, whether do not dispose situation such as network element, reach the purpose that the whole network disposes.
Can carry out the clock status of the whole network in Clock view safeguards.The clock tracing that generates according to view concerns and the clock tracing state, with and eye-catching color-coded, accurately and fast in network-wide basis, carry out the maintenance and the tracking (whether having disconnected fibre, clock tracing whether service disconnection or the like takes place to cause unusually) of clock status, reach the whole network purpose of fault location, raising network reliability quick and precisely as network.
In the network upgrade process, can be by Clock view configurable clock generator data, quick and precisely locate the fault that may occur during upgrading, thus make things convenient for the whole network upgrading.
Though described the present invention by embodiment, those of ordinary skills know, the present invention has many distortion and variation and does not break away from spirit of the present invention, for example, change a little, can adopt different algorithm to generate the clock tracing relation and the clock tracing state of the whole network network element, and can set displaying contents in the Clock view and be not limited to described clock tracing and concern and the clock tracking mode, wish that appended claim comprises these distortion and variation and do not break away from spirit of the present invention.
Claims (10)
1, a kind of management method of network clocking is characterized in that, described method comprises step:
A, generate the clock tracing relation and/or the clock tracing state of the whole network network element according to the corresponding relation of the clock source priority of each single station network element in the described network and link information;
B, set up Clock view according to the clock tracing relation and/or the clock tracing state of the whole network network element of described generation.
2, the management method of network clocking as claimed in claim 1 is characterized in that, also comprises step: the Clock view according to described foundation manages the whole network clock.
3, the management method of network clocking as claimed in claim 1 is characterized in that, described step a comprises:
C, obtain in the described network clock source priority list of each single station network element;
D, obtain in the described network that optical fiber between each single station network element connects or the configuration information of multiplex section link or regenerator section link;
E, according to the clock source priority list of described single station network element and the optical fiber between the network element of described single station connects or the configuration information of multiplex section link or regenerator section link, the clock source of setting up described single station network element is connected with optical fiber or the corresponding relation of multiplex section link or regenerator section link;
F, is connected with optical fiber or the corresponding relation of multiplex section link or regenerator section link, generates the stand clock tracing of network element of described list and concern according to the clock source of single station network element of described foundation;
G, successively to the whole network network element repeated execution of steps e to f, generate the clock tracing relation of the whole network network element.
4, the management method of network clocking as claimed in claim 3, it is characterized in that, described step e comprises: the clock source priority list that travels through described each single station network element, if the light mouth has described optical fiber to connect or multiplex section link or regenerator section link under the described clock source, set up then that described clock source is connected with described optical fiber or the corresponding relation of multiplex section link or regenerator section link.
5, as the management method of claim 1 or 3 described network clockings, it is characterized in that, described step a also comprises: according to the clock tracing relation of the whole network network element of the present clock tracing source of single station network element and described generation, generate the clock tracing state of the whole network network element.
6, the management method of network clocking as claimed in claim 5 is characterized in that, described according to single station network element the present clock tracing source and the clock tracing relation of the whole network network element of generation, the step that generates the clock tracing state of the whole network network element comprises:
H, obtain the present clock tracing source of described single station network element;
The clock tracing relation of single station network element of i, the described generation of traversal, the clock tracing that obtains described present clock tracing source correspondence concerns;
J, the clock tracing of putting described present clock tracing source correspondence closes is the clock tracing state of described single station network element;
K, successively to the whole network network element repeated execution of steps h to step j, generate the clock tracing state of the whole network network element.
7, the management method of network clocking as claimed in claim 6 is characterized in that, described step I comprises: the present clock tracing source for the single station network element that does not find corresponding clock tracing relation is set mark.
As the management method of claim 1 or 7 described network clockings, it is characterized in that 8, described step b comprises: the clock tracing relation and the clock tracing state that show the whole network network element of described generation with visual figure and/or image.
9, the management method of network clocking as claimed in claim 8 is characterized in that, visual figure of described usefulness and/or image show that the clock tracing of the whole network network element of described generation concerns and the step of clock tracing state comprises:
Difference shows the state of described network clock source;
Difference shows the state of described clock tracing relation and clock tracing state.
10, the management method of network clocking as claimed in claim 2, it is characterized in that described Clock view according to described foundation comprises the step that the whole network clock manages: the Clock view according to described foundation is configured, safeguards and upgrade the whole network clock.
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| CNB2003101139846A CN100550761C (en) | 2003-11-15 | 2003-11-15 | A kind of management method of network clocking |
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| CNB2003101139846A CN100550761C (en) | 2003-11-15 | 2003-11-15 | A kind of management method of network clocking |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008125028A1 (en) * | 2007-04-11 | 2008-10-23 | Huawei Technologies Co., Ltd. | A method, an apparatus and a network element for tracing clock |
| EP2148459A1 (en) * | 2007-05-17 | 2010-01-27 | Huawei Technologies Co., Ltd. | A method for establishing clock trace relationship and an equipment for computing clock trace relationship |
| CN101141240B (en) * | 2007-04-18 | 2010-06-09 | 中兴通讯股份有限公司 | SDH clock automatically networking method |
| CN101335609B (en) * | 2007-06-26 | 2011-08-10 | 华为技术有限公司 | Network time clock tracking method, network apparatus and network system |
| WO2012068791A1 (en) * | 2010-11-22 | 2012-05-31 | 中兴通讯股份有限公司 | Method, network device and network management platform for intelligent clock maintenance |
| CN103166750A (en) * | 2011-12-14 | 2013-06-19 | 中兴通讯股份有限公司 | Clock time synchronous resource distribution method and device |
| CN104009860A (en) * | 2013-02-26 | 2014-08-27 | 华为技术有限公司 | Method for detecting clock link risks, and network management system |
| CN104796272A (en) * | 2014-01-16 | 2015-07-22 | ***通信集团广东有限公司 | Network clock monitoring method and network clock monitoring device |
| CN106921509A (en) * | 2015-12-28 | 2017-07-04 | 中兴通讯股份有限公司 | A kind of method and device of the whole network clock management by synchronization |
| CN108173617A (en) * | 2017-11-21 | 2018-06-15 | 北京兰云科技有限公司 | A kind of the whole network clock topology and clock method for obtaining path |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008125028A1 (en) * | 2007-04-11 | 2008-10-23 | Huawei Technologies Co., Ltd. | A method, an apparatus and a network element for tracing clock |
| US8160053B2 (en) | 2007-04-11 | 2012-04-17 | Huawei Technologies Co., Ltd. | Method, apparatus and network element for clock tracing |
| CN101286835B (en) * | 2007-04-11 | 2013-03-20 | 华为技术有限公司 | Clock tracing method, device and network element device |
| CN101141240B (en) * | 2007-04-18 | 2010-06-09 | 中兴通讯股份有限公司 | SDH clock automatically networking method |
| EP2148459A1 (en) * | 2007-05-17 | 2010-01-27 | Huawei Technologies Co., Ltd. | A method for establishing clock trace relationship and an equipment for computing clock trace relationship |
| EP2148459A4 (en) * | 2007-05-17 | 2010-10-27 | Huawei Tech Co Ltd | A method for establishing clock trace relationship and an equipment for computing clock trace relationship |
| CN101335609B (en) * | 2007-06-26 | 2011-08-10 | 华为技术有限公司 | Network time clock tracking method, network apparatus and network system |
| WO2012068791A1 (en) * | 2010-11-22 | 2012-05-31 | 中兴通讯股份有限公司 | Method, network device and network management platform for intelligent clock maintenance |
| CN103166750A (en) * | 2011-12-14 | 2013-06-19 | 中兴通讯股份有限公司 | Clock time synchronous resource distribution method and device |
| WO2013086833A1 (en) * | 2011-12-14 | 2013-06-20 | 中兴通讯股份有限公司 | Clock time synchronization source configuration method and device |
| CN103166750B (en) * | 2011-12-14 | 2018-03-09 | 中兴通讯股份有限公司 | Synchronizing clock time source collocation method and device |
| CN104009860A (en) * | 2013-02-26 | 2014-08-27 | 华为技术有限公司 | Method for detecting clock link risks, and network management system |
| CN104009860B (en) * | 2013-02-26 | 2018-04-20 | 华为技术有限公司 | For detecting the method and Network Management System of clock chain circuit risk |
| CN104796272A (en) * | 2014-01-16 | 2015-07-22 | ***通信集团广东有限公司 | Network clock monitoring method and network clock monitoring device |
| CN104796272B (en) * | 2014-01-16 | 2018-11-23 | ***通信集团广东有限公司 | The monitoring method and device of network clocking |
| CN106921509A (en) * | 2015-12-28 | 2017-07-04 | 中兴通讯股份有限公司 | A kind of method and device of the whole network clock management by synchronization |
| CN106921509B (en) * | 2015-12-28 | 2020-07-10 | 中兴通讯股份有限公司 | Method and device for synchronous management of whole network clock |
| CN108173617A (en) * | 2017-11-21 | 2018-06-15 | 北京兰云科技有限公司 | A kind of the whole network clock topology and clock method for obtaining path |
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| CN100550761C (en) | 2009-10-14 |
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