CN105744616B - A kind of method for synchronizing time and device - Google Patents
A kind of method for synchronizing time and device Download PDFInfo
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- CN105744616B CN105744616B CN201410745541.7A CN201410745541A CN105744616B CN 105744616 B CN105744616 B CN 105744616B CN 201410745541 A CN201410745541 A CN 201410745541A CN 105744616 B CN105744616 B CN 105744616B
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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Abstract
The invention discloses a kind of method for synchronizing time, methods described includes：The time synchronized attribute of the physical couplings of each port reported according to each node in transmission network, the port attribute of each port and each port, determine to support the annexation of the port of time synchronized function in the physical link annexation and every physical link of the transmission network；According to the annexation of port and the time synchronized attribute of each port for supporting time synchronized function on the physical link annexation, every physical link, select to need the port of opening time synchronizing function for every physical link.The present invention also discloses a kind of time synchronism apparatus.
Description
Technical field
The present invention relates to mobile communication technology, more particularly to a kind of method for synchronizing time and device.
Background technology
With the development of mobile communication technology, TD SDMA (TD-SCDMA, Time Division-
Synchronous Code Division Multiple Access), CDMA (CDMA2000, Code Division
Multiple Access 2000), timesharing Long Term Evolution (TD-LTE, Time Division Long Term Evolution)
Precise synchronization demand is respectively provided with etc. system, TD SDMA is 3G (Third Generation) Moblie standard (3G, 3rd
Generation), and International Telecommunication Union (ITU, International Telecommunication Union) approval
One in three 3G standards.Need correct time synchronous between base station, if the time between base station is not synchronous, that
Base station can be caused to disturb, call connection can not be established by even resulting in base station.In the prior art can be by adding in each base station
Global positioning system (GPS, Global Positioning System) module is filled to solve the problems, such as base station time synchronism, but face
The drawbacks of Linan dress addressing is difficult, cost of installation and maintenance is high.
In order to reduce installation difficulty and cost, in the industry typically using the method for terrestrial transmission time synchronized, Fig. 1-1 is use
The network architecture schematic diagram of terrestrial transmission method for synchronizing time, as Figure 1-1, i.e., set up and be used in the upstream of transmission network 11
The time server 12 in satellite time source is received, passage time server 12 is carried out in set of convergence to satellite time source, Ran Houtong
The time synchronization protocol for crossing ground transmission 11 sends temporal information to each base station 13；It can be seen that using the terrestrial transmission time
Synchronous method is not required to install GPS module on each base station 13.
In terms of ground delivery time synchronous protocol, Institute of Electrical and Electric Engineers (IEEE, Institute of
Electrical and Electronics Engineers) 1588 version 2s (v2, version 2) agreement is current industry master
The accurate time synchronization protocol of stream.The precision of IEEE 1588v2 agreements reaches submicrosecond level, and therefore, IEEE 1588v2 agreements are wide
It is general to be used for GSM synchronization.The agreements of IEEE 1588 are first by Agilent development in laboratory, IEEE 1588v1 versions
Issued on November 8th, 2002.IEEE passed through 1588 v2 drafts on March 27th, 2008, to version 1 (v1, version
1) improved, IEEE 1588v2 issued on July 24th, 2008.The agreements of IEEE 1588 use the master-slave mode time
Synchronization mechanism.In the communication path that one meets 1588 agreements, source time is provided so that next stage clock is synchronous by master clock,
Also supply from clock reference simultaneously.From clock then by with master clock intercommunication message, so as to according to master clock provide time
Correct local zone time.
For each time synchronization node, when with multiple time sources, the agreements of IEEE 1588 use best master clock
(BMC, Best Master Clock) algorithm carrys out decision-making which time source is best, and determines the next of port accordingly
State value.Each clock independent operating BMC algorithms.BMC algorithms include two parts Algorithm constitution, i.e. data set comparison algorithm and end
Mouth state decision making algorithm.After BMC algorithm decision-makings, time synchronization node adjustment port time state, system clock tracking
The best master clock that decision-making goes out.
The device nodes such as the transmission equipment for setting up Time Synchronization Network (hereinafter referred to as node), individual node just has
Tens or even individual service port up to a hundred, realized according to device software or hardware, these ports may whole or which part end
Mouth supports time synchronized function.If all ports for supporting time synchronized function of equipment are opened into its time synchronizing function,
The equipment can be caused to participate in selecting the time source quantity in source excessive, the software and hardware that each port and centring system processing time synchronously take
Resource is excessive, so as to influence systematic function.And individual node participates in selecting the time source quantity in source excessive, it is also possible to causes event
The unstability that barrier is switched repeatedly when switching between different time source.
Based on considerations above, needed when setting up Time Synchronization Network for each node selected section port open time it is same
Function is walked, participating in time synchronized by these selected ports selects source.In the prior art, node is matched somebody with somebody one by one by technical staff
Put and unlatching port, had the following problems using manual type：1), configuration work amount and complexity are high, it is necessary to combine each section
Point specific network environment determine open which port time synchronized function, so as to cause to complete it is whole net configuration the time required to compared with
It is long；2), configuration is difficult to unification, and due to the network environment and configuration personnel's difference of every equipment, configuration, which is opened, participates in equipment choosing
It is difficult to unification during time source during source；3), easily there is configuration error, for example, to be only configured with looped network direction for example suitable by technical staff
Conterclockwise time source, and because error is configured without anticlockwise time source, if clockwise direction interruption of optical cables
When, then it can use without time source, so as to cause time synchronized to be interrupted.
The content of the invention
In view of this, the embodiment of the present invention provides a kind of time to solve at least one problem present in prior art
Synchronous method and device, the time synchronized of transmission network can be planned automatically, it is not necessary to it is artificial to participate in, so as to greatly letter
Change quantities and shorten the setup time of whole transmission network.
To reach above-mentioned purpose, what the technical scheme of the embodiment of the present invention was realized in：
In a first aspect, the embodiment of the present invention provides a kind of method for synchronizing time, methods described includes：
The physical couplings of each port reported according to each node in transmission network, the port attribute of each port and each end
The time synchronized attribute of mouth, determine to support that the time is same in the physical link annexation and every physical link of the transmission network
Walk the annexation of the port of function；
Closed according to the connection for the port that time synchronized function is supported on the physical link annexation, every physical link
System and the time synchronized attribute of each port, the port of opening time synchronizing function is needed for every physical link selection.
Second aspect, the embodiment of the present invention provide a kind of time synchronism apparatus, and described device includes determining unit and selection
Unit, wherein：
The determining unit, physical couplings, each end for each port for being reported according to each node in transmission network
The port attribute of mouth and the time synchronized attribute of each port, determine the physical link annexation and every thing of the transmission network
Manage the annexation for the port that time synchronized function is supported on link；
The selecting unit, for supporting time synchronized according on the physical link annexation, every physical link
The annexation of the port of function and the time synchronized attribute of each port, need the opening time for every physical link selection
The port of synchronizing function.
A kind of method for synchronizing time and device provided in an embodiment of the present invention, wherein：According in transmission network on each node
The physical couplings of each port, the port attribute of each port and the time synchronized attribute of each port of report, determine the transmission
The annexation of the port of time synchronized function is supported in the physical link annexation of network and every physical link；According to institute
State physical link annexation, support on every physical link time synchronized function port annexation and each port
Time synchronized attribute, the port of opening time synchronizing function is needed for the selection of every physical link；In this way, time synchronized by when
Between sychronisation automatically planned, thus need not manually participate in, quantities can be greatly simplified and shorten whole transmission
The setup time of network.
Brief description of the drawings
Fig. 1-1 is the network architecture schematic diagram using terrestrial transmission method for synchronizing time；
Fig. 1-2 is the implementation process schematic diagram one of the method for synchronizing time of the embodiment of the present invention one；
Fig. 1-3 is the implementation process schematic diagram two of the method for synchronizing time of the embodiment of the present invention one；
Fig. 1-4 is the implementation process schematic diagram of step 101 in the embodiment of the present invention one；
Fig. 2 is the implementation process schematic diagram of the method for synchronizing time of the embodiment of the present invention two；
Fig. 3-1 is the implementation process schematic diagram of the method for synchronizing time of the embodiment of the present invention three；
Fig. 3-2 is the implementation process schematic diagram of step 303 in the embodiment of the present invention three；
Fig. 4-1 is the composition structural representation one of the time synchronism apparatus of the embodiment of the present invention four；
Fig. 4-2 is the composition structural representation of selecting unit in the embodiment of the present invention four；
Fig. 4-3 is the composition structural representation two of the time synchronism apparatus of the embodiment of the present invention four；
Fig. 4-4 is the composition structural representation of determining unit in the embodiment of the present invention four；
Fig. 5 is the composition structural representation of the clock synchronization system of the embodiment of the present invention five；
Fig. 6-1 is the composition structural representation of the time synchronism apparatus of the embodiment of the present invention six；
Fig. 6-2 is the composition structural representation of the second selecting module in the embodiment of the present invention six.
Embodiment
The technical solution of the present invention is further elaborated with specific embodiment below in conjunction with the accompanying drawings.
Embodiment one
The embodiment of the present invention provides a kind of method for synchronizing time, and this method is applied in time synchronism apparatus, and Fig. 1-2 is this
The implementation process schematic diagram one of the method for synchronizing time of inventive embodiments one, as shown in Figure 1-2, this method includes：
Step 101, the physical couplings of each port reported according to each node in transmission network, the port category of each port
Property and the time synchronized attribute of each port, determine to prop up in the physical link annexation and every physical link of the transmission network
Hold the annexation of the port of time synchronized function；
Here, the physical couplings refer to the annexation between physically each port, for example, two ports it
Between connected by three GE lines, then physical couplings just refer to what is connected by three GE lines between two ports, and
It is not that this three GE lines are abstracted into a circuit；When three GE lines are abstracted as into a circuit, what this method was stated
Relation between port can be understood as physical topology relation, and the physical couplings in the embodiment of the present invention are not that physics is opened up
Flutter relation.
Here, the physical link abstracts, such as connected between two ports by ten GE lines, then
This ten GE lines can be abstracted into one.
Here, the port attribute of either port includes port-mark (ID, Identity) information, the either end of either port
The node identification information and physical interface type (such as Fast Ethernet of board and any affiliated node of place board where mouthful
(FE, Fast Ethernet) electrical interface, gigabit Ethernet (GE, Gigabit Ethernet) optical interface) etc..
Here, the port time synchronized attribute of either port including either port whether support time synchronized function, whether
Only support main (master) port, if only support from (slave) port etc..
Step 102, according to the port that time synchronized function is supported on the physical link annexation, every physical link
Annexation and each port time synchronized attribute, need opening time synchronizing function for the selection of every physical link
Port.
In the embodiment of the present invention, the step 102 is described according to the physical link annexation and every physical link
The upper annexation of port and the time synchronized attribute of each port for supporting time synchronized function, it is that every physical link selects
Selecting needs the port of opening time synchronizing function, including：
Step 1021, according to the end that time synchronized function is supported on the physical link annexation, every physical link
The annexation of mouth and the time synchronized attribute of each port, determine that the both ends of every physical link support that the time is same respectively
Walk the port of function；
Step 1022, support to select in the port of time synchronized function from the both ends of every physical link of determination respectively
N1 needs the port of opening time synchronizing function to port as every physical link, wherein the N1 is default to be more than 1
Integer.
Here, it is described to support to select in the port of time synchronized function from the both ends of every physical link of determination respectively
N1 needs the port of opening time synchronizing function to port as every physical link, including：
According to default priority, the end of time synchronized function is supported from the both ends of every physical link of determination respectively
Selection N1 needs the port of opening time synchronizing function to port as every physical link in mouthful.Wherein, it is described default excellent
First level includes different slots position in preferred node, the port on different boards；And the priority ratio of gigabit Ethernet GE electrical interfaces
The priority of interface in addition to GE electrical interfaces is low.It can be seen that when selecting N to port, it may be considered that the time that each port is set is same
Walk priority to carry out preferably, priority may include different slots position in prioritizing selection node, the port on different boards, wherein GE electricity
The priority of mouth is relatively low, and GE power ports are not selected as far as possible in the case of having other optical interfaces and electrical interface.
Accordingly, as Figure 1-3, this method also includes：
Step 103, the time synchronized of the port for needing opening time synchronizing function of selection is opened for every physical link
Function；
Step 104, confidence is matched somebody with somebody into the port of the port for needing opening time synchronizing function of the selection of every physical link
Breath is handed down to each node.
In the embodiment of the present invention, the time synchronism apparatus can be the central control units such as the webmaster in transmission network；
The framework of the transmission network may refer to Fig. 1-1, and each node of the transmission network refers to the time synchronized in transmission network
Equipment, i.e. see each time synchronism equipment as a node.
In the embodiment of the present invention, as Figure 1-4, the step 101 is described to be reported according to each node in transmission network
The time synchronized attribute of the physical couplings of each port, the port attribute of each port and each port, determines the transmission network
Physical link annexation and every physical link on support time synchronized function port annexation, including：
Step 1011, the physical couplings for each port that each node reports, the port of each port in transmission network are received
Attribute and the time synchronized attribute of each port；
Step 1012, according to the physical couplings of each port and the port attribute of each port, it is determined that described
The physical link annexation of transmission network；
Step 1013, according to the physical link annexation, the physical couplings of each port, each port
Port attribute and each port time synchronized attribute, determine on every physical link support time synchronized function port
Annexation.
In the embodiment of the present invention, this method also includes：
Step 105, the node identification information of two nodes of the both ends connection of any bar physical link is obtained；
Step 106, two nodes of any bar physical link both ends connection are detected according to the node identification information
Effective time path between time server whether there is, and obtain testing result；
Step 107, when the testing result show two nodes of any bar physical link both ends connection with it is described
When effective time path between time server is not present, the second warning information is reported；
Here, second warning information carries the node identification information, and second warning information is used to show
Time synchronized between two nodes and the time server of any bar physical link both ends connection is interrupted.
A kind of method for synchronizing time provided in an embodiment of the present invention, wherein：Reported according to each node in transmission network each
The time synchronized attribute of the physical couplings of port, the port attribute of each port and each port, determines the transmission network
The annexation of the port of time synchronized function is supported in physical link annexation and every physical link；According to the physics
The annexation of port and the time of each port of time synchronized function are supported in link connection relation, every physical link
Synchronization properties, the port of opening time synchronizing function is needed for every physical link selection；In this way, time synchronized is by time synchronized
Device is automatically planned, thus need not manually be participated in, and can be greatly simplified quantities and be shortened whole transmission network
Setup time.
Embodiment two
Based on the above embodiments one, the embodiment of the present invention provides a kind of method for synchronizing time, and this method is applied to the time
Synchronization system, the clock synchronization system include each node in time synchronism apparatus and transmission network, and Fig. 2 is implemented for the present invention
The implementation process schematic diagram of the method for synchronizing time of example two, as shown in Fig. 2 this method includes：
Step 201, each node is same by the physical couplings, port attribute and time of each port of itself in transmission network
Step attribute reports time synchronism apparatus；
Here, each node of transmission network can typically be closed the physical connection of each port by the network management interface of node
System, port attribute and time synchronized attribute report network management unit, and the network management unit can be the embodiment of the present invention
Provided in time synchronism apparatus.Passage is reported to be generally special data communication network used by each node of transmission network
(DCN, Data Communication Network), the conventional interface protocol for reporting webmaster include Qx interface protocols, simple
NMP (SNMP, Simple Network Management Protocol) interface protocol etc..
Here, the physical couplings refer to the annexation between physically each port, for example, two ports it
Between connected by three GE lines, then physical couplings just refer to what is connected by three GE lines between two ports, and
It is not that this three GE lines are abstracted into a circuit；When three GE lines are abstracted as into a circuit, what this method was stated
Relation between port can be understood as physical topology relation, and the physical couplings in the embodiment of the present invention are not that physics is opened up
Flutter relation
Here, the port attribute of either port includes the port identification information of the either port, either port institute
In node identification information and physical interface type of board and any affiliated node of place board etc.；Either port when
Between synchronization properties whether support time synchronized function including either port, whether only support master port, if only support from port.
Step 202, the time synchronism apparatus receives the physics company of each port that each node reports in the transmission network
Connect the time synchronized attribute of relation, the port attribute of each port and each port；
Step 203, the physical connection for each port that the time synchronism apparatus reports according to each node in transmission network is closed
The time synchronized attribute of system, the port attribute of each port and each port, determine the physical link annexation of the transmission network
With the annexation of the port of support time synchronized function on every physical link；
Step 204, when the time synchronism apparatus on the physical link annexation, every physical link according to supporting
Between synchronizing function the annexation of port and the time synchronized attribute of each port, select needs to open for every physical link
Open the port of time synchronized function；
Step 205, the time synchronism apparatus be every physical link open selection need opening time synchronizing function
Port time synchronized function；
Step 206, the selection of every physical link is needed opening time synchronizing function by the time synchronism apparatus
The port configuration information of port is handed down to each node.
In the embodiment of the present invention, the step 203, the physics of each port reported according to each node in transmission network
The time synchronized attribute of annexation, the port attribute of each port and each port, determine that the physical link of the transmission network connects
The annexation for the port that time synchronized function is supported on relation and every physical link is connect, including：
Receive the physical couplings of each port, the port attribute of each port and each end that each node reports in transmission network
The time synchronized attribute of mouth；
According to the physical couplings of each port and the port attribute of each port, the transmission network is determined
Physical link annexation；
Belonged to according to the port of the physical link annexation, the physical couplings of each port, each port
Property and each port time synchronized attribute, determine on every physical link support time synchronized function port connection close
System.
Embodiment three
Based on foregoing embodiment, the embodiment of the present invention provides a kind of method for synchronizing time, and it is same that this method is applied to the time
Device is walked, Fig. 3-1 is the implementation process schematic diagram of the method for synchronizing time of the embodiment of the present invention three, as shown in figure 3-1, this method bag
Include：
Step 301, the physical couplings of each port reported according to each node in transmission network, the port category of each port
Property and the time synchronized attribute of each port, determine to prop up in the physical link annexation and every physical link of the transmission network
Hold the annexation of the port of time synchronized function；
Here, the physical couplings refer to the annexation between physically each port, for example, two ports it
Between connected by three GE lines, then physical couplings just refer to what is connected by three GE lines between two ports, and
It is not that this three GE lines are abstracted into a circuit；When three GE lines are abstracted as into a circuit, what this method was stated
Relation between port can be understood as physical topology relation, and the physical couplings in the embodiment of the present invention are not that physics is opened up
Flutter relation.
Here, board where the port identification information of the port attribute of either port including either port, either port with
And the node identification information of any affiliated node of place board and physical interface type etc.；The time synchronized attribute bag of either port
Include whether either port supports time synchronized function, whether only supports master port, if only support from port etc..
Step 302, according to the port that time synchronized function is supported on the physical link annexation, every physical link
Annexation and each port time synchronized attribute, determine that time synchronized is supported at the both ends of every physical link respectively
The linking number M of the port of function, wherein the M is the integer more than or equal to 0；
Step 303, opening time synchronizing function is needed for every physical link selection according to the M of every physical link respectively
Port.
Here, the N is can voluntarily set with those skilled in the art, for example, those skilled in the art can incite somebody to action
N=3 is set.The N is the integer more than 1；It is described " to support time synchronized function from connection both ends for every physical link
N is selected in port to port " in " both ends " refer to two ports of physical link.
Step 304, the time synchronized of the port for needing opening time synchronizing function of selection is opened for every physical link
Function；
Step 305, confidence is matched somebody with somebody into the port of the port for needing opening time synchronizing function of the selection of every physical link
Breath is handed down to each node.
In the embodiment of the present invention, as shown in figure 3-2, the step 303 is described to be according to the M of every physical link respectively
Every physical link selection needs the port of opening time synchronizing function, including：
Step 3031, for any bar physical link, judge whether the M of any bar physical link is equal to 0, obtain the
One judged result；
Step 3032, when first judged result shows that the M of any bar physical link is more than 0, described in judgement
The M and N2 of any bar physical link magnitude relationship, obtain the second judged result；
Here, the N2 be it is default be more than 1 integer；
Step 3033, when second judged result shows that the M of any bar physical link is more than or equal to the N2,
Support to select N2 to port as described any in the port of time synchronized function from the both ends of any bar physical link
Bar physical link needs the port of opening time synchronizing function.
Step 3034, when second judged result shows that the M of any bar physical link is less than the N2, from institute
Support to select M to port as any bar physics in the port of time synchronized function in the both ends for stating any bar physical link
Link needs the port of opening time synchronizing function.
Step 3035, when first judged result shows that the M of any bar physical link is equal to 0, first is reported
Warning information；
Here, first warning information is used to show that any bar physical link does not support time synchronized.
In the embodiment of the present invention, N1 and N2 value can cause for the port number selected by every physical link not
Together.
In the embodiment of the present invention, the port of time synchronized function is supported at the both ends from any bar physical link
Middle selection N2 needs the port of opening time synchronizing function to port as any bar physical link, including：
According to default priority, supported in the port of time synchronized function from the both ends of any bar physical link
Selection N2 needs the port of opening time synchronizing function to port as any bar physical link.
In the embodiment of the present invention, the port attribute of either port comprise at least the either port port identification information,
The node identification information and physical interface type of board and any affiliated node of place board where the either port；
Whether only whether the time synchronized attribute of either port support time synchronized function, including at least the either port
Support master port, if only support from port.
In embodiments of the present invention, if detecting that certain physical link can not find connection both ends and support time synchronized
The port connection of function, then report this physical link not support time synchronized to alert (reporting the first warning information).Then
Time synchronism apparatus can further detect as follows：
Two nodes connected for this physical link both ends, detect the Time Service of the two nodes and transmission network
Effective time, path whether there is between device.For some node, if the node can not be found between time server
Effective time path, then report the even more serious node time sync break to alert (i.e. the second warning information).Need to illustrate
, effective time path it is determined that when can use routing algorithm based on minimum spanning tree the methods of.
It is the physical couplings of each port reported according to each node in transmission network, each in the embodiment of the present invention
The port attribute of port and the time synchronized attribute of each port, determine the transmission network physical link annexation and every
The annexation of the port of time synchronized function is supported on physical link, including：
Receive the physical couplings for each port that each node reports in transmission network, the port attribute of each port, each end
The time synchronized attribute of mouth；
According to the physical couplings of each port and the port attribute of each port, the transmission network is determined
Physical link annexation；
Belonged to according to the port of the physical link annexation, the physical couplings of each port, each port
Property and each port time synchronized attribute, determine on every physical link support time synchronized function port connection close
System.
Technical scheme provided in an embodiment of the present invention, there is advantages below：1) time synchronized is automatic by time synchronism apparatus
Ground is planned, thus need not manually be participated in, and can be greatly simplified quantities and be shortened the setup time of whole transmission network；
2) can be detected simultaneously by whole transmission network does not have the physical link of time source and node, and report and alarm information reminding safeguards people
Member solves, and therefore, it is possible to the operation troubles after effectively preventing synchronizing network from opening, and then improves reliability.3) configuration is unified,
Each node and physical link in transmission network can be configured to multiple time sources, ensure the primary and backup of time synchronized
Connection, so as to the configuration error for avoiding prior art from being likely to occur, and then improve reliability.
Example IV
Based on foregoing embodiment one to three, the embodiment of the present invention provides a kind of time synchronism apparatus, and Fig. 4-1 is the present invention
The composition structural representation one of example IV time synchronism apparatus, as shown in Fig. 4-1, the time synchronism apparatus 400 includes determining
Unit 401, selecting unit 402, wherein：
The determining unit 401, it is physical couplings for each port for being reported according to each node in transmission network, each
The port attribute of port and the time synchronized attribute of each port, determine the transmission network physical link annexation and every
The annexation of the port of time synchronized function is supported on physical link；
Here, the physical couplings refer to the annexation between physically each port, for example, two ports it
Between connected by three GE lines, then physical couplings just refer to what is connected by three GE lines between two ports, and
It is not that this three GE lines are abstracted into a circuit；When three GE lines are abstracted as into a circuit, what this method was stated
Relation between port can be understood as physical topology relation, and the physical couplings in the embodiment of the present invention are not that physics is opened up
Flutter relation.
Here, board where the port identification information of the port attribute of either port including either port, either port with
And node identification information, the physical interface type (such as FE electrical interfaces, GE optical interfaces) of any affiliated node of place board.
Here, the port time synchronized attribute of either port including either port whether support time synchronized function, whether
Only support master port, if only support from port etc..
The selecting unit 402, for same according to the support time on the physical link annexation, every physical link
The annexation of port and the time synchronized attribute of each port of function are walked, when needing to open for every physical link selection
Between synchronizing function port.
In the embodiment of the present invention, as shown in the Fig. 4-2, the selecting unit 402 includes the first determining module 4021 and first
Selecting module 4022, wherein：
First determining module 4021, for being supported according on the physical link annexation, every physical link
The annexation of the port of time synchronized function and the time synchronized attribute of each port, every physical link is determined respectively
Support the port of time synchronized function in both ends；
The first choice module 4022, for supporting time synchronized from the both ends of every physical link of determination respectively
N1 is selected to need the port of opening time synchronizing function as every physical link to port in the port of function, wherein the N1
For it is default be more than 1 integer.
In the embodiment of the present invention, the selecting module, for according to default priority, respectively from every physics of determination
Support to select N1 to need the opening time as every physical link to port in the port of time synchronized function in the both ends of link
The port of synchronizing function.
In the embodiment of the present invention, as shown in Fig. 4-3, described device also includes opening unit 403 and issuance unit 404, its
In：
The opening unit 403, for opening the end for needing opening time synchronizing function of selection for every physical link
The time synchronized function of mouth；
The issuance unit 404, for by the port for needing opening time synchronizing function of the selection of every physical link
Port configuration information be handed down to each node.
In the embodiment of the present invention, the time synchronism apparatus can be the central control units such as the webmaster in transmission network；
The framework of the transmission network may refer to Fig. 1-1, and each node of the transmission network refers to the time synchronized in transmission network
Equipment, i.e. see each time synchronism equipment as a node.
In the embodiment of the present invention, as shown in Fig. 4-4, the determining unit 401 includes receiving module the 4011, the 3rd and determines mould
The determining module 4013 of block 4012 and the 4th, wherein：
The receiving module 4011, the physical couplings of each port reported for receiving each node in transmission network,
The port attribute of each port, the time synchronized attribute of each port；
3rd determining module 4012, for the physical couplings according to each port and the end of each port
Mouth attribute, determine the physical link annexation of the transmission network；
4th determining module 4013, for being connected according to the physics of the physical link annexation, each port
The time synchronized attribute of relation, the port attribute of each port and each port is connect, determines to support on every physical link
The port connection relationship of time synchronized function.
In the embodiment of the present invention, the port attribute of the either port comprises at least the port-mark letter of the either port
The node identification information and physical interface class of board and any affiliated node of place board where breath, the either port
Type；
Whether only whether the time synchronized attribute of either port support time synchronized function, including at least the either port
Support master port, if only support from port.
In the embodiment of the present invention, selecting module, for according to default priority, respectively from every physical link of determination
Both ends support to select N1 to need the opening time synchronous as every physical link port in the port of time synchronized function
The port of function.Wherein described default priority includes different slots position in preferred node, the port on different boards；And thousand
The priority of interface of the priority ratio of mbit ethernet GE electrical interfaces in addition to GE electrical interfaces is low.
A kind of time synchronism apparatus provided in an embodiment of the present invention, wherein：Determining unit 401 in transmission network according to respectively saving
The time synchronized attribute of the physical couplings of each port, the port attribute of each port and each port that point reports, it is determined that described
The annexation of the port of time synchronized function is supported in the physical link annexation of transmission network and every physical link；Choosing
Select connection of the unit 402 according to the port that time synchronized function is supported on the physical link annexation, every physical link
Relation and the time synchronized attribute of each port, the port of opening time synchronizing function is needed for every physical link selection；
It in this way, time synchronized is automatically planned by time synchronism apparatus, thus need not manually participate in, engineering can be greatly simplified
Measure and shorten the setup time of whole transmission network.
Embodiment five
Based on foregoing example IV, the embodiment of the present invention provides a kind of clock synchronization system, and Fig. 5 is the embodiment of the present invention
The composition structural representation of five clock synchronization systems, as shown in figure 5, the system includes time synchronism apparatus 400 and transmission network
In each node 500, wherein the time synchronism apparatus 400 includes determining unit 401 and selecting unit 402, wherein：
Each node 500 in the transmission network, for by the port of the physical couplings of each port of itself, each port
Attribute and the time synchronized attribute of each port report time synchronism apparatus；
The determining unit 401, the physical connection of each port reported for receiving each node in the transmission network are closed
The time synchronized attribute of system, the port attribute of each port and each port；Each port reported according to each node in transmission network
The time synchronized attribute of physical couplings, the port attribute of each port and each port, determine the physics chain of the transmission network
The annexation of the port of time synchronized function is supported in road annexation and every physical link；
The selecting unit 402, for same according to the support time on the physical link annexation, every physical link
The annexation of port and the time synchronized attribute of each port of function are walked, when needing to open for every physical link selection
Between synchronizing function port.
In the embodiment of the present invention, the determining unit includes receiving module, the 3rd determining module and the 4th determining module, its
In：
The receiving module, the physical couplings of each port reported for receiving each node in transmission network, each end
Port attribute, the time synchronized attribute of each port of mouth；
3rd determining module, for the physical couplings according to each port and the port attribute of each port, it is determined that
The physical link annexation of the transmission network；
4th determining module, for according to the physical link annexation, the physical connection of each port pass
The time synchronized attribute of system, the port attribute of each port and each port, determines to support the time on every physical link
The port connection relationship of synchronizing function.
In the embodiment of the present invention, the port attribute of either port includes the port identification information, described of the either port
Board and the node identification information of any affiliated node of place board and physical interface type etc. where either port；
Whether whether the time synchronized attribute of either port supported time synchronized function including the either port, only supported
Master port, if only support from port etc..
Embodiment six
Based on foregoing example IV and embodiment five, the embodiment of the present invention provides a kind of time synchronism apparatus, and Fig. 6-1 is
The composition structural representation of the time synchronism apparatus of the embodiment of the present invention six, as in Figure 6-1, the time synchronism apparatus 600 include
Determining unit 601, selecting unit 602, opening unit 603 and issuance unit 604, wherein the selecting unit 602 includes second
The selecting module 6022 of determining module 6021 and second, wherein：
The determining unit 601, it is physical couplings for each port for being reported according to each node in transmission network, each
The port attribute of port and the time synchronized attribute of each port, determine the transmission network physical link annexation and every
The annexation of the port of time synchronized function is supported on physical link；
Here, the physical couplings refer to the annexation between physically each port, for example, two ports it
Between connected by three GE lines, then physical couplings just refer to what is connected by three GE lines between two ports, and
It is not that this three GE lines are abstracted into a circuit；When three GE lines are abstracted as into a circuit, what this method was stated
Relation between port can be understood as physical topology relation, and the physical couplings in the embodiment of the present invention are not that physics is opened up
Flutter relation.
Second determining module 6021, for being supported according on the physical link annexation, every physical link
The annexation of the port of time synchronized function and the time synchronized attribute of each port, every physical link is determined respectively
The linking number M of the port of time synchronized function is supported at both ends, wherein the M is the integer more than or equal to 0；
Second selecting module 6022, for selecting need according to the M of every physical link for every physical link respectively
Want the port of opening time synchronizing function.
The opening unit 603, for opening time synchronized functions of the N to port for every physical link；
The issuance unit 604, for the N of every physical link to be handed down to respectively to the port configuration information of port
Node.
In the embodiment of the present invention, as in fig. 6-2, second selecting module 6022 includes the first judging submodule
6221st, the second judging submodule 6222 and selection submodule 6223, wherein：
First judging submodule 6221, for for any bar physical link, judging any bar physical link
M whether be equal to 0, obtain the first judged result；
Second judging submodule 6222, for showing any bar physical link when first judged result
When M is more than 0, judges the M and N2 of any bar physical link magnitude relationship, obtain the second judged result, wherein the N2
For it is default be more than 1 integer；
The selection submodule 6223, for showing that the M of any bar physical link is big when second judged result
When equal to the N2, support to select N2 opposite ends in the port of time synchronized function from the both ends of any bar physical link
Mouth needs the port of opening time synchronizing function as any bar physical link.
In the embodiment of the present invention, the selection submodule, for according to default priority, from any bar physics chain
Support to select N2 to need to open as any bar physical link to port in the port of time synchronized function in the both ends on road
The port of time synchronized function.
In the embodiment of the present invention, the selection submodule, it is additionally operable to when second judged result shows any bar
When the M of physical link is less than the N2, supported in the port of time synchronized function from the both ends of any bar physical link
Selection M needs the port of opening time synchronizing function to port as any bar physical link.
In the embodiment of the present invention, the selecting unit also includes reporting module, for showing when first judged result
When the M of any bar physical link is equal to 0, the first warning information is reported, first warning information is used to show described appoint
One physical link does not support time synchronized.
In the embodiment of the present invention, the time synchronism apparatus 600 is also including declaration form in acquiring unit, detection unit and second
Member, wherein：
The acquiring unit, the node identification for two nodes that the both ends for obtaining any bar physical link connect
Information；
The detection unit, for detecting what any bar physical link both ends connected according to the node identification information
Two effective time paths between node and time server whether there is, and obtain testing result；
The reporting unit, for showing two sections of any bar physical link both ends connection when the testing result
When effective time path between point and the time server is not present, the second warning information is reported；
Second warning information carries the node identification information, and second warning information is used to show described appoint
Time synchronized between two nodes and the time server that one physical link both ends connects is interrupted.
In the embodiment of the present invention, the determining unit includes receiving module, the 3rd determining module and the 4th determining module, its
In：
The receiving module, the physical couplings of each port reported for receiving each node in transmission network, each end
Port attribute, the time synchronized attribute of each port of mouth；
3rd determining module, belong to for the port of the physical couplings according to each port and each port
Property, determine the physical link annexation of the transmission network；
4th determining module, for according to the physical link annexation, the physical connection of each port pass
The time synchronized attribute of system, the port attribute of each port and each port, determines to support the time on every physical link
The port connection relationship of synchronizing function.
In the embodiment of the present invention, the port attribute of either port includes the port identification information, described of the either port
The node identification information of board and any affiliated node of place board, physical interface type etc. where either port；
Whether whether the time synchronized attribute of either port supported time synchronized function including the either port, only supported
Master port, if only support from port.
It need to be noted that be：The description of above time synchronism apparatus embodiment, it is applied to time synchronized side with above-mentioned
The description of method embodiment is similar, has the identical beneficial effect with embodiment of the method, therefore do not repeat.For this hair
The ins and outs not disclosed in bright time synchronism apparatus embodiment, it refer to the description of method for synchronizing time embodiment of the present invention.
In several embodiments provided herein, it should be understood that disclosed apparatus and method, it can be passed through
Its mode is realized.Apparatus embodiments described above are only schematical, for example, the division of the unit, is only
A kind of division of logic function, there can be other dividing mode when actually realizing, such as：Multiple units or component can combine, or
Another system is desirably integrated into, or some features can be ignored, or do not perform.In addition, shown or discussed each composition portion
Point mutual coupling or direct-coupling or communication connection can be the INDIRECT COUPLINGs by some interfaces, equipment or unit
Or communication connection, can be electrical, mechanical or other forms.
The above-mentioned unit illustrated as separating component can be or may not be physically separate, show as unit
The part shown can be or may not be physical location；Both a place can be located at, multiple network lists can also be distributed to
In member；Partly or entirely unit therein can be selected to realize the purpose of this embodiment scheme according to the actual needs.
In addition, each functional unit in various embodiments of the present invention can be fully integrated into a processing unit, also may be used
To be each unit individually as a unit, can also two or more units it is integrated in a unit；It is above-mentioned
Integrated unit can both be realized in the form of hardware, can also be realized in the form of hardware adds SFU software functional unit.
One of ordinary skill in the art will appreciate that：Realizing all or part of step of above method embodiment can pass through
Programmed instruction related hardware is completed, and foregoing program can be stored in computer read/write memory medium, and the program exists
During execution, execution the step of including above method embodiment；And foregoing storage medium includes：Movable storage device, read-only deposit
Reservoir (Read-Only Memory, ROM), magnetic disc or CD etc. are various can be with the medium of store program codes.
Or if the above-mentioned integrated unit of the present invention is realized in the form of software function module and is used as independent product
Sale in use, can also be stored in a computer read/write memory medium.Based on such understanding, the present invention is implemented
The part that the technical scheme of example substantially contributes to prior art in other words can be embodied in the form of software product,
The computer software product is stored in a storage medium, including some instructions are causing a computer equipment (can be with
It is personal computer, server or network equipment etc.) perform all or part of each embodiment methods described of the present invention.
And foregoing storage medium includes：Movable storage device, ROM, magnetic disc or CD etc. are various can be with Jie of store program codes
Matter.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (22)
1. a kind of method for synchronizing time, it is characterised in that methods described includes：
The physical couplings of each port reported according to each node in transmission network, the port attribute of each port and each port
Time synchronized attribute, determine to support time synchronized work(in the physical link annexation and every physical link of the transmission network
The annexation of the port of energy；
According on the physical link annexation, every physical link support time synchronized function port annexation and
The time synchronized attribute of each port, the port of opening time synchronizing function is needed for every physical link selection；
Judge that the both ends of every physical link support whether the linking number M of the port of time synchronized function is equal to 0, obtain the
One judged result；Wherein, the M is the integer more than or equal to 0；
When first judged result shows that the M of any bar physical link is equal to 0, the first warning information is reported, it is described
First warning information is used to show that any bar physical link does not support time synchronized.
2. according to the method for claim 1, it is characterised in that described according to the physical link annexation and every thing
The annexation of port and the time synchronized attribute of each port that time synchronized function is supported on link are managed, is every physics
Link selection needs the port of opening time synchronizing function, including：
According on the physical link annexation, every physical link support time synchronized function port annexation and
The time synchronized attribute of each port, determine that the port of time synchronized function is supported at the both ends of every physical link respectively；
Support to select N1 from the both ends of every physical link of determination respectively in the port of time synchronized function to port conduct
Every physical link needs the port of opening time synchronizing function, wherein the N1 be it is default be more than 1 integer.
3. according to the method for claim 2, it is characterised in that described equal from the both ends of every physical link of determination respectively
Support the end for selecting N1 to need opening time synchronizing function as every physical link to port in the port of time synchronized function
Mouthful, including：
According to default priority, supported in the port of time synchronized function from the both ends of every physical link of determination respectively
Selection N1 needs the port of opening time synchronizing function to port as every physical link.
4. according to the method for claim 1, it is characterised in that described according to the physical link annexation and every thing
The annexation of port and the time synchronized attribute of each port that time synchronized function is supported on link are managed, is every physics
Link selection needs the port of opening time synchronizing function, including：
According on the physical link annexation, every physical link support time synchronized function port annexation and
The time synchronized attribute of each port, determine that the port of time synchronized function is supported at the both ends of every physical link respectively
Linking number M, wherein the M is the integer more than or equal to 0；
It is respectively the port that every physical link selection needs opening time synchronizing function according to the M of every physical link.
5. according to the method for claim 4, it is characterised in that described is respectively every thing according to the M of every physical link
Reason link selection needs the port of opening time synchronizing function, including：
For any bar physical link, judge whether the M of any bar physical link is equal to 0, obtain the first judged result；
When first judged result shows that the M of any bar physical link is more than 0, any bar physical link is judged
M and N2 magnitude relationship, obtain the second judged result, wherein the N2 be it is default be more than 1 integer；
When second judged result shows that the M of any bar physical link is more than or equal to the N2, from any bar
Support to select N2 to need port as any bar physical link in the port of time synchronized function in the both ends of physical link
Want the port of opening time synchronizing function.
6. according to the method for claim 5, it is characterised in that the both ends from any bar physical link are supported
N2 is selected to need opening time synchronizing function as any bar physical link to port in the port of time synchronized function
Port, including：
According to default priority, support to select in the port of time synchronized function from the both ends of any bar physical link
N2 needs the port of opening time synchronizing function to port as any bar physical link.
7. according to the method for claim 5, it is characterised in that it is described obtain the second judged result after, in addition to：
When second judged result shows that the M of any bar physical link is less than the N2, from any bar physics
Support to select M to need to open as any bar physical link to port in the port of time synchronized function in the both ends of link
The port of time synchronized function.
8. according to the method for claim 1, it is characterised in that described to need the opening time same for every physical link selection
After the port for walking function, in addition to：
The time synchronized function of the port for needing opening time synchronizing function of selection is opened for every physical link；
The port configuration information of the port for needing opening time synchronizing function of the selection of every physical link is handed down to each section
Point.
9. according to the method for claim 1, it is characterised in that methods described also includes：
Obtain the node identification information of two nodes of the both ends connection of any bar physical link；
Two nodes and time server of any bar physical link both ends connection are detected according to the node identification information
Between effective time path whether there is, obtain testing result；
When the testing result show any bar physical link both ends connection two nodes and the time server it
Between effective time path when being not present, report the second warning information；
Second warning information carries the node identification information, and second warning information is used to show any bar
Time synchronized between two nodes and the time server of the connection of physical link both ends is interrupted.
10. according to the method described in any one of claim 1 to 9, it is characterised in that described according in transmission network on each node
The physical couplings of each port, the port attribute of each port and the time synchronized attribute of each port of report, determine the transmission
The annexation of the port of time synchronized function is supported in the physical link annexation of network and every physical link, including：
Receive the physical couplings of each port, the port attribute of each port and each port that each node reports in transmission network
Time synchronized attribute；
According to the physical couplings of each port and the port attribute of each port, the physics of the transmission network is determined
Link connection relation；
According to the physical link annexation, the physical couplings of each port, each port port attribute and
The time synchronized attribute of each port, determine to support the port connection relationship of time synchronized function on every physical link.
11. according to the method described in any one of claim 1 to 9, it is characterised in that the port attribute of either port comprises at least
The port identification information of the either port, board where the either port and any affiliated node of place board
Node identification information and physical interface type；
Whether whether the time synchronized attribute of either port supported time synchronized function including at least the either port, only supported
Master port, if only support from port.
A kind of 12. time synchronism apparatus, it is characterised in that described device includes determining unit and selecting unit, wherein：
The determining unit, physical couplings, each port for each port for being reported according to each node in transmission network
Port attribute and the time synchronized attribute of each port, determine the physical link annexation and every physics chain of the transmission network
The annexation of the port of time synchronized function is supported on road；
The selecting unit, for according to support time synchronized function on the physical link annexation, every physical link
The annexation of port and the time synchronized attribute of each port, need the opening time synchronous for the selection of every physical link
The port of function；
Judge that the both ends of every physical link support whether the linking number M of the port of time synchronized function is equal to 0, obtain the
One judged result；Wherein, the M is the integer more than or equal to 0；
The selecting unit also includes reporting module, for showing any bar physical link when first judged result
When M is equal to 0, the first warning information is reported, when first warning information is used to show that any bar physical link is not supported
Between it is synchronous.
13. device according to claim 12, it is characterised in that the selecting unit includes the first determining module and first
Selecting module, wherein：
First determining module, for supporting time synchronized according on the physical link annexation, every physical link
The annexation of the port of function and the time synchronized attribute of each port, determine that the both ends of every physical link are propped up respectively
Hold the port of time synchronized function；
The first choice module, for supporting the end of time synchronized function from the both ends of every physical link of determination respectively
Selection N1 needs the port of opening time synchronizing function to port as every physical link in mouthful, wherein the N1 is default
Integer more than 1.
14. device according to claim 13, it is characterised in that the selecting module, for according to default priority,
Support to select N1 to be used as every to port in the port of time synchronized function from the both ends of every physical link of determination respectively
Physical link needs the port of opening time synchronizing function.
15. device according to claim 12, it is characterised in that the selecting unit includes the second determining module and second
Selecting module, wherein：
Second determining module, for supporting time synchronized according on the physical link annexation, every physical link
The annexation of the port of function and the time synchronized attribute of each port, determine that the both ends of every physical link are propped up respectively
The linking number M of the port of time synchronized function is held, wherein the M is the integer more than or equal to 0；
Second selecting module, during for according to the M of every physical link being respectively that the selection of every physical link needs to open
Between synchronizing function port.
16. device according to claim 15, it is characterised in that second selecting module judges submodule including first
Block, the second judging submodule and selection submodule, wherein：
First judging submodule, for for any bar physical link, judge any bar physical link M whether etc.
In 0, the first judged result is obtained；
Second judging submodule, for showing that the M of any bar physical link is more than 0 when first judged result
When, judge the M and N2 of any bar physical link magnitude relationship, obtain the second judged result, wherein the N2 is default
Be more than 1 integer；
The selection submodule, for showing that the M of any bar physical link is more than or equal to institute when second judged result
When stating N2, support to select N2 to port as institute in the port of time synchronized function from the both ends of any bar physical link
Stating any bar physical link needs the port of opening time synchronizing function.
17. device according to claim 16, it is characterised in that the selection submodule, for according to default preferential
Level, support to select N2 to be used as port described appoint in the port of time synchronized function from the both ends of any bar physical link
One physical link needs the port of opening time synchronizing function.
18. device according to claim 16, it is characterised in that the selection submodule, be additionally operable to when described second sentences
When disconnected result shows that the M of any bar physical link is less than the N2, supported from the both ends of any bar physical link
M is selected to need the end of opening time synchronizing function as any bar physical link to port in the port of time synchronized function
Mouthful.
19. device according to claim 12, it is characterised in that described device also includes opening unit and issuance unit,
Wherein：
The opening unit, the time of the port for needing opening time synchronizing function for opening selection for every physical link
Synchronizing function；
The issuance unit, for the port of the port for needing opening time synchronizing function of the selection of every physical link to be matched somebody with somebody
Confidence breath is handed down to each node.
20. device according to claim 12, it is characterised in that described device also include acquiring unit, detection unit and
Reporting unit, wherein：
The acquiring unit, the node identification letter for two nodes that the both ends for obtaining any bar physical link connect
Breath；
The detection unit, for detecting two of any bar physical link both ends connection according to the node identification information
Effective time path between node and time server whether there is, and obtain testing result；
The reporting unit, for show when the testing result two nodes of any bar physical link both ends connection with
When effective time path between the time server is not present, the second warning information is reported；
Second warning information carries the node identification information, and second warning information is used to show any bar
Time synchronized between two nodes and the time server of the connection of physical link both ends is interrupted.
21. according to the device described in any one of claim 12 to 20, it is characterised in that the determining unit includes receiving mould
Block, the 3rd determining module and the 4th determining module, wherein：
The receiving module, the physical couplings of each port reported for receiving each node in transmission network, each port
Port attribute and the time synchronized attribute of each port；
3rd determining module, for the physical couplings according to each port and the port attribute of each port,
Determine the physical link annexation of the transmission network；
4th determining module, for according to the physical link annexation, the physical couplings of each port, institute
The port attribute of each port and the time synchronized attribute of each port are stated, determines to support time synchronized work(on every physical link
The port connection relationship of energy.
22. according to the device described in any one of claim 12 to 20, it is characterised in that the port attribute of either port at least wraps
Include port identification information, either port place board and any affiliated node of place board of the either port
Node identification information and physical interface type；
Whether whether the time synchronized attribute of either port supported time synchronized function including at least the either port, only supported
Master port, if only support from port.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410745541.7A CN105744616B (en) | 2014-12-08 | 2014-12-08 | A kind of method for synchronizing time and device |
| PCT/CN2015/094971 WO2016091050A1 (en) | 2014-12-08 | 2015-11-19 | Time synchronization method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410745541.7A CN105744616B (en) | 2014-12-08 | 2014-12-08 | A kind of method for synchronizing time and device |
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| CN105744616B true CN105744616B (en) | 2018-03-23 |
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| CN106131437A (en) * | 2016-08-25 | 2016-11-16 | 武汉烽火众智数字技术有限责任公司 | A kind of Multi net voting video camera method for synchronizing time and system |
| CN110167132B (en) | 2018-02-14 | 2021-02-12 | 华为技术有限公司 | Communication method and communication device |
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|---|---|---|---|---|
| US8145809B1 (en) * | 2007-03-09 | 2012-03-27 | Cypress Semiconductor Corporation | Busy detection logic for asynchronous communication port |
| CN102420667A (en) * | 2011-11-29 | 2012-04-18 | 浙江省电力公司 | System and implementation method of time synchronization network based on synchronous digital hierarchy (SDH) |
| CN102469569A (en) * | 2010-11-08 | 2012-05-23 | 中国移动通信集团公司 | Time synchronization method of mobile communication system and synchronization device thereof |
| CN102761407A (en) * | 2012-07-16 | 2012-10-31 | 中兴通讯股份有限公司 | Machine frame straddling system and implementation method and device of time and frequency passthrough thereof |
| CN103312429A (en) * | 2013-06-08 | 2013-09-18 | 杭州华三通信技术有限公司 | Time synchronization method and time synchronization device |
-
2014
- 2014-12-08 CN CN201410745541.7A patent/CN105744616B/en active Active
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2015
- 2015-11-19 WO PCT/CN2015/094971 patent/WO2016091050A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8145809B1 (en) * | 2007-03-09 | 2012-03-27 | Cypress Semiconductor Corporation | Busy detection logic for asynchronous communication port |
| CN102469569A (en) * | 2010-11-08 | 2012-05-23 | 中国移动通信集团公司 | Time synchronization method of mobile communication system and synchronization device thereof |
| CN102420667A (en) * | 2011-11-29 | 2012-04-18 | 浙江省电力公司 | System and implementation method of time synchronization network based on synchronous digital hierarchy (SDH) |
| CN102761407A (en) * | 2012-07-16 | 2012-10-31 | 中兴通讯股份有限公司 | Machine frame straddling system and implementation method and device of time and frequency passthrough thereof |
| CN103312429A (en) * | 2013-06-08 | 2013-09-18 | 杭州华三通信技术有限公司 | Time synchronization method and time synchronization device |
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| CN105744616A (en) | 2016-07-06 |
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