CN108259105A - A kind of time synchronizing method, apparatus and synchronizing network - Google Patents

Abstract

The present invention provides a kind of time synchronizing method, apparatus and synchronizing network, and this method is applied to based on the first network device node in the synchronizing network synchronized at the first time, including：Obtain the second time of at least one time base source；Calculate the second time of at least one time base source and the difference information of the first time；The difference information is sent to other network equipment nodes of the synchronizing network.The first time that can be used due to each network equipment node in synchronizing network according to the difference information that first network device node transmits with synchronizing network, the second time of time base source is calculated, so as in a set of clock system, the scheme of different time transmission is realized, therefore solves the problems, such as to transmit different time references in a synchronizing network.

Description

A kind of time synchronizing method, apparatus and synchronizing network

Technical field

The present invention relates to Internet technical field more particularly to a kind of time synchronizing method, apparatus and synchronizing networks.

Background technology

In the prior art, different application may need different Time Synchronization Networks to transmit the time of different benchmark letter Number.Such as WAP, short message, multimedia message, BOSS, all kinds of gateways, intelligent network, network management system, signaling equipment, biography in mobile communication system The daily record of transfer device, data equipment etc. reports, alarm time etc., and NTP (Network Time Protocol) network is used to assist View.In addition, in order to meet the synchronisation requirement of the base stations in mobile communication system such as TD-SCDMA/TD-LTE, PTP (Picture are used Transfer Protocol) agreement be Base Station Transmission Time information.

In addition, to be divided into Absolute Time Synchronization synchronous with relative time for time synchronization.Absolute Time Synchronization needs every in network The absolute time of a node all tracks a certain markers, such as UTC (UTC Universal Time Coordinated).Relative time, which synchronizes, refers to network node Between keep synchronize, it is not necessarily synchronous with a certain absolute time mark.

In synchronous applications, some applications need Absolute Time Synchronization, such as bill charging, financial transaction etc., some should It is synchronized with the relative time only needed between node, such as carrier aggregation (CA) business between base station, it is desirable to provide carrier aggregation Synchronous error was no more than for hundreds of nanoseconds between two base stations.

Which type of therefore, need to consider synchronisation requirement solved when setting up Time Synchronization Network, for different demands, time Synchronizing network needs independently to dispose.Due to needing to carry out independent deployment, it will generate problems in a network：

First, for the network equipment for connecting different application, need to support a variety of time protocols and processing simultaneously.Often A network equipment must all support independent at least two sets of time synchronizing systems, the support including software and hardware, so that The network equipment supports that cost is higher.

Second, as shown in Figure 1, for shared network, Network of being commonly set up and shared is difficult to different operators and transmits difference Time returns as shown in the figure, operator A/B/C has shared intermediate transmission network for downstream base station, for conventional transmission For equipment, only set of system clock, it is assumed that intermediate transport networks track the time server of operator A, then due in The internal system time of intermediate node has followed the time for being synchronized with operator A, and operation can not be transmitted again in same network of throwing the net The time that quotient B and operator's C time servers provide so that Network of being commonly set up and shared can not transmit different time.

Third, some applications are due to only needing the relative time between node to synchronize, then can be in small area network It is mutually calibrated between node, reaches relative time synchronization.At this moment, this small area network exists inclined with extraneous absolute time reference Difference, but due to being mutually in step between node, extraneous absolute time reference can not be synchronized with, then this small area network Then the application of absolute time reference can not be needed to provide service for other again.

To sum up, a synchronizing network wishes to serve every different application, some applications may need the different time Benchmark, some applications need relative time, some applications need absolute time, then how to be transmitted not in a synchronizing network The technical issues of same time reference becomes urgent need to resolve.

Invention content

The embodiment of the present invention provides a kind of time synchronizing method, apparatus and synchronizing network, to solve in a synchronization The problem of different time references are transmitted in network.

In a first aspect, an embodiment of the present invention provides a kind of time synchronizing method, applied to based on first time into First network device node in the synchronous synchronizing network of row, including：

Obtain the second time of at least one time base source；

Calculate the second time of at least one time base source and the difference information of the first time；

The difference information is sent to other network equipment nodes of the synchronizing network.

Second aspect, the embodiment of the present invention additionally provide a kind of time synchronizing method, applied to based at the first time In the second network equipment node in the synchronizing network synchronized, including：

Receive difference information；The difference information record has the first time and the second of at least one time base source Time difference between time；

It is calculated according to the difference information received and the first time and obtains at least one time base source The second time.

The third aspect, the embodiment of the present invention additionally provide a kind of time synchronizing method, applied to based at the first time In the second network equipment node in the synchronizing network synchronized, including：

Receive difference information；The difference information record has the first time and the second of at least one time base source Time difference between time；

The difference information is forwarded.

Fourth aspect, the embodiment of the present invention additionally provide a kind of time synchronizing method, applied to based at the first time In the synchronizing network synchronized, the time synchronizing method includes：

First network device node in the synchronizing network obtains the second time of at least one time base source；

When the first network device node calculates the second time of at least one time base source with described first Between difference information；

The difference information is sent to other network equipment sections of the synchronizing network by the first network device node Point；

Other described network equipment nodes receive difference information, forward the difference information and/or according to the institute received It states difference information and the first time calculates and obtains second time.

5th aspect, the embodiment of the present invention additionally provide a kind of time synchronizing device, applied to based at the first time First network device node in the synchronizing network synchronized, including：

Acquisition module, for obtaining the second time of at least one time base source；

First computing module, for calculating the second time of at least one time base source and the first time Difference information；

Difference information sending module, for the difference information to be sent to other network equipment sections of the synchronizing network Point.

6th aspect, the embodiment of the present invention additionally provide a kind of time synchronizing device, applied to based at the first time In the second network equipment node in the synchronizing network synchronized, including：

First receiving module receives difference information；Difference information record have the first time with it is at least one when Between a reference source the second time between time difference；

Second computing module, the difference information received for basis and the first time are calculated described in acquisition extremely Second time of a few time base source.

7th aspect, the embodiment of the present invention additionally provide a kind of time synchronizing device, applied to based at the first time In the second network equipment node in the synchronizing network synchronized, including：

Second receiving module, for receiving difference information；The difference information record has the first time and at least one Time difference between second time of a time base source；

Second forwarding module, for being forwarded to the difference information.

Eighth aspect, the embodiment of the present invention additionally provide a kind of synchronizing network, and the synchronizing network is based on same at the first time Step, the synchronizing network include first network device node and the second network equipment node, the first network device node packet It includes：

Acquisition module, for obtaining the second time of at least one time base source；

First computing module, for calculating the second time of at least one time base source and the first time Difference information；

Difference information sending module, for the difference information to be sent to second network equipment node；

Second network equipment node includes：

First receiving module receives difference information；

Difference processing module, for forwarding the difference information and/or according to the difference information that receives and described It calculates at the first time and obtains second time.

In this way, in the embodiment of the present invention, the second time of at least one time base source is obtained；It calculates described at least one Second time of time base source and the difference information of the first time；The difference information is sent to the synchronizing network Other network equipment nodes.Since each network equipment node in synchronizing network can be transmitted according to first network device node First time for using of difference information and synchronizing network, the second time of time base source is calculated, so as to when a set of In clock synchronization system, the scheme of different time transmission is realized, therefore is solved when transmitting different in a synchronizing network Between benchmark the problem of.

Description of the drawings

In order to illustrate the technical solution of the embodiments of the present invention more clearly, needed in being described below to the embodiment of the present invention Attached drawing to be used is briefly described, it should be apparent that, the accompanying drawings in the following description is only some embodiments of the present invention, For those of ordinary skill in the art, without having to pay creative labor, it can also be obtained according to these attached drawings Obtain other attached drawings.

Fig. 1 is shared network transmission architecture figure；

Fig. 2 is the flow chart for the time synchronizing method that first embodiment of the invention provides；

Fig. 3 is the flow chart for the time synchronizing method that second embodiment of the invention provides；

Fig. 4 is the flow chart for the time synchronizing method that third embodiment of the invention provides；

Fig. 5 is the clock processing stream of the second network equipment node in time synchronizing method provided in an embodiment of the present invention Journey schematic diagram；

Fig. 6 is the flow chart for the time synchronizing method that fourth embodiment of the invention provides；

Fig. 7 is one of flow chart of time synchronizing method that fifth embodiment of the invention provides；

Fig. 8 is the two of the flow chart for the time synchronizing method that fifth embodiment of the invention provides；

Fig. 9 is the flow chart for the time synchronizing method that sixth embodiment of the invention provides；

Figure 10 is the flow chart for the time synchronizing method that seventh embodiment of the invention provides；

Figure 11 is the flow chart for the time synchronizing method that eighth embodiment of the invention provides；

Figure 12 is the flow chart for the time synchronizing method that ninth embodiment of the invention provides；

Figure 13 is the structure chart for the time synchronizing device that tenth embodiment of the invention provides；

Figure 14 is the structure chart for the time synchronizing device that eleventh embodiment of the invention provides；

Figure 15 is the structure chart for the time synchronizing device that twelveth embodiment of the invention provides；

Figure 16 is the structure chart for the synchronizing network that thriteenth embodiment of the invention provides.

Specific embodiment

Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete Site preparation describes, it is clear that described embodiment is part of the embodiment of the present invention, instead of all the embodiments.Based on this hair Embodiment in bright, the every other implementation that those of ordinary skill in the art are obtained without creative efforts Example, shall fall within the protection scope of the present invention.

First embodiment

The time synchronizing method that first embodiment of the invention provides is applied to same based on what is synchronized at the first time When walking the first network device node in network, referring to Fig. 2, which includes the following steps：

Step 201, the second time of at least one time base source is obtained.

It is provided in an embodiment of the present invention to be mainly used in based on the first net in the synchronizing network synchronized at the first time Network device node, the first network device node are the network equipment node that can obtain time base source.Specifically, in synchronization Multiple network equipment nodes can be included in network, in the synchronizing network, the time that can obtain a time base source is made Time synchronization is carried out for first time, time synchronization can also be carried out according to the first time that time base source is calculated, also Can be that multiple network equipment nodes are calculated at the first time according to the progress time time of itself, it is same so as to carry out the time Step, it is not further herein to be limited.In the synchronizing network, when at least one network equipment node can obtain more than one Between a reference source the corresponding time, so as to obtain above-mentioned second time.

It is understood that the multiple time base sources corresponding time differs, here, the quantity to time base source It is not described further with the time.In the present embodiment, the network equipment node of the second time of time base source can be obtained It is referred to as first network device node.That is, there may be one or more first network in a synchronizing network Device node.For example, in same synchronizing network, a first network device node can be set to obtain multiple time base sources The second time.

Specifically, the first network device node can directly be connect with above-mentioned time base source can also by one or The multiple intermediary network device nodes of person are connect with time base source, as long as the second time of time base source can be obtained. For example, comprising two synchronizing networks in a network system, wherein, the network equipment node in first synchronizing network is obtaining After getting the second time of above-mentioned time base source, the second time of the time base source can be output to the second synchronizing network First network device node in.

Step 202, difference information of second time with the first time of at least one time base source is calculated.

In the step, the quantity of above-mentioned time base source can be multiple, which includes each time reference Second time in source and corresponding size of the difference at the first time.Specifically, in the second time for getting time base source, it ought Before the second time of time base source for getting calculating is compared with first time, when determining that the second time is relative to first Between difference information.

Step 203, the difference information is sent to other network equipment nodes of the synchronizing network.

In the step, sending the mode of above-mentioned difference information can be configured according to actual needs, for example, can carry out The corresponding difference information of each time base source is sent one by one, all difference informations can also be packaged and sent together.In addition, Transmitting path can be set to be sent, can also be sent by the way of diffusion.It at the same time, can be to the same time The difference information of a reference source is sent once, can also periodically send the difference information of same time base source (with to difference Information is updated), it can also send that (for example, being sent when meeting transmission condition, which can include on demand Receive the request message of downstream network device node).

In the present embodiment, other above-mentioned network equipment nodes are the network equipment node except first network device node. After other network equipment nodes receive above-mentioned difference information, difference that can be according to the first time that itself is used with receiving Value information be calculated the second time of time base source, and then second time can be exported, so as to fulfill The transmission of second time.

In this way, in the embodiment of the present invention, the second time of at least one time base source is obtained；It calculates described at least one Second time of time base source and the difference information of the first time；The difference information is sent to the synchronizing network Other network equipment nodes.Since each network equipment node in synchronizing network can be transmitted according to first network device node First time for using of difference information and synchronizing network, the second time of time base source is calculated, so as to when a set of In clock synchronization system, the scheme of different time transmission is realized, therefore is solved when transmitting different in a synchronizing network Between benchmark the problem of.

As shown in figure 3, the time synchronizing method of second embodiment of the invention includes：

Step 201, the second time of at least one time base source is obtained；

Step 202, difference information of second time with the first time of at least one time base source is calculated；

Step 204, it is described at least one by what is currently obtained every preset period of time or when the condition of transmission is set up The second time corresponding difference information of time base source is sent to other network equipment nodes of the synchronizing network.

In the time synchronizing method of second embodiment of the invention, it is periodicity sending to send difference information.Example Such as when reaching preset cycle time, it will obtain the second time of time base source first, then basis currently obtains Second time was compared with current first time so as to redefine the corresponding difference information of time base source, then should Difference information is sent in other network equipment nodes of synchronizing network.By in this present embodiment, having been carried out more to difference information Newly, so as to improve other network equipment nodes of synchronizing network acquisition the second time accuracy.Further, may be used also Processing is optimized with the second time of the time base source according to acquisition, such as other network equipment nodes will can repeatedly connect The corresponding difference information of same time base source received is weighted average computation and obtains corresponding weighted average, then will The weighted average and the second time at the first time be calculated time base source；In addition, first network node can be with According to the second time of the same time base source repeatedly obtained and the difference information compared at the first time, it is weighted flat Corresponding weighted average is calculated, then using the weighted average as difference information to be sent, is sent to other Network equipment node.

It is understood that the mode of above-mentioned difference information output can be configured according to actual needs, such as can be with It is periodically actively exported by first network device node or in the request for receiving upstream device, carries out difference The output of information.

It should be noted that in other embodiments, in order to ensure that each network equipment node can receive time reference The corresponding difference information in source can send same difference information, to avoid after difference information is sent for the first time with controlling cycle The network equipment node reached the standard grade can not obtain the difference information.In addition, the network reached the standard grade after transmission difference information for the first time is set Slave node can also send after reaching the standard grade and ask the active obtaining difference information.

Further, sending the mode of difference information can be configured as needed, in the first scheme of the present embodiment In, above-mentioned steps 204 include：

According to the second time corresponding difference information of at least one time base source currently obtained and it is described when Between a reference source identity information generated time difference information message；

The time difference infomational message is sent to other network equipment nodes of the synchronizing network.

In the alternative plan in the present embodiment, above-mentioned steps 204 include：

According to the second time corresponding difference information of at least one time base source currently obtained and for marking Know the sequence number of message transmission times；

The time difference infomational message is sent to other network equipment nodes of the synchronizing network；So that it is described its His network equipment node determines the sequence of the time difference infomational message according to the sequence number.

Specifically, each time difference infomational message can include the corresponding difference information of a time base source, also may be used To include all corresponding difference informations of time base source.Due in the present embodiment, difference being sent by way of message Information, and sequence number is set in time difference infomational message, so as to each difference for determining to receive according to sequence number The sequence of value information.It sequentially may determine whether to miss difference information according to this, so as to fulfill the loss detection to difference information. Specifically, can be detected to whether the same difference information of multiple time base sources once sent loses, it can also be to more Whether the difference information of the same time base source of secondary transmission, which loses, is detected.

It should be understood that in order to identify the facility information for sending above-mentioned time difference infomational message, in above-mentioned time difference information It can also include the identification information of first network device node, such as device id in message.

The time synchronizing method that third embodiment of the invention provides is applied to same based on what is synchronized at the first time The second network equipment node in network is walked, referring to Fig. 4, which includes the following steps：

Step 401, difference information is received；The difference information record has the first time and at least one time reference Time difference between second time in source；

Step 402, when obtaining described at least one according to the difference information received and first time calculating Between a reference source the second time.

In the embodiment of the present invention, above-mentioned difference information can by above-mentioned first network device node send difference information, Or the intermediary network device node transmission among above-mentioned first network device node and the second network equipment node when Between information, which can be the second network equipment node, or be only used for forwarding above-mentioned difference to believe The network equipment node of breath.Wherein, first network device node can obtain the second time and first time of time base source, And it carries out contrast conting and obtains the corresponding difference information of the time base source.Then the second network is directly or indirectly sent to set In slave node, after which receives above-mentioned difference information, can according to the first time that itself is in The difference information received be calculated the second time of time base source, then second time can be carried out defeated Go out, it is achieved thereby that the transmission in same synchronizing network to the second time of time base source.

In the present embodiment, as shown in figure 5, the clock process flow of the second network equipment node includes existing scheme to first The second procedure that the first pass and this programme of time synchronizing handle time base source, wherein the first process flow packet It includes：Primary timing source processing and system clock, second processing flow include：It receives difference information, difference information forwarding or calculates The second time for obtaining time base source is supplied to upstream device.

In the embodiment of the present invention, difference information is received；Difference information record have the first time with it is at least one Time difference between second time of time base source；It is calculated and obtained according to the difference information received and the first time Obtain the second time of at least one time base source.Due to the of the second time that cannot directly acquire time base source In two network equipment nodes, after obtaining the second time of time base source and the difference information of first time, according to the difference The second time of time base source is calculated in value information, so that all second networks in same synchronizing network Device node can obtain the second time of time base source, therefore solve when transmitting different in a synchronizing network Between benchmark the problem of.

As shown in fig. 6, the time synchronizing method of fourth embodiment of the invention includes：

Step 401, difference information is received；The difference information record has the first time and at least one time reference Time difference between second time in source；

Step 402, when obtaining described at least one according to the difference information received and first time calculating Between a reference source the second time；

Step 403, the second time of at least one time base source is exported to accessing second network equipment The upstream device of node.

It, can be by the second of the time base source after the second time for obtaining time base source is calculated in the present embodiment Time is output in the upstream device of the second network equipment node.Specifically, the downstream network device can be another synchronous net First network device node (downstream transport device for being used for transmission the second time of time base source) in network or Using end equipment (such as counting equipment, user equipment etc.).

It is understood that the mode of second time output can be configured, such as can be by according to actual needs Second network equipment node actively exports or in the request for receiving upstream device, when then carrying out calculating acquisition Between a reference source the second time, finally carry out the output of the second time.

It should be noted that in same synchronizing network, there may be one or more the second network equipment node, Each second network equipment node is carried out the second time of time base source calculating and output can synchronous progress can also Asynchronous progress, specifically, this is described in detail below：

As shown in fig. 7, in the first scheme of the time synchronizing method of fifth embodiment of the invention, including：

Step 401, difference information is received；The difference information record has the first time and at least one time reference Time difference between second time in source；

Step 4021, when receiving the difference information, according to the difference information that receives and it is described first when Between calculate the second time for obtaining at least one time base source.

As shown in figure 8, in the second scheme of the time synchronizing method of fifth embodiment of the invention, including：

Step 401, difference information is received；The difference information record has the first time and at least one time reference Time difference between second time in source；

Step 4022, when the first time reaching preset time point, according to the difference information and institute received State the second time for calculating obtain at least one time base source at the first time.

In the present embodiment, may be used for the output adjustment mode of the second time in each second network equipment node A kind of scheme can also use second scheme, can specifically be configured according to actual needs.Wherein, in the first scheme In, each second network equipment node can be calculated and be exported after difference information is received；In second scheme, respectively Second network equipment node is after difference information is received, and at the time of can be according to agreement, while can be calculated and be exported. It is described in the present embodiment to be calculated and output refers to, when can be using the difference information being currently received as calculating Between a reference source the second time standard.Below will by taking the corresponding difference information of the same time base source of periodic receipt as an example into Row is described in detail：

For example, after the second network equipment node receives the first difference information for the first time, if receiving pair of upstream device During the second time request of time base source, second network equipment node will with the first difference information and first time, into Output of the second time of time base source as the second time request message is calculated in row.When the second network equipment node After receiving the second difference information for the second time：

According to the first scheme, then when asking the second time of upstream device, second network equipment are being received Node, with the second difference information and first time, will be calculated the second time of time base source as this second when Between request message output；

According to second scheme, then before the arrival of above-mentioned preset time point, receive upstream device to time reference During the second time request in source, which with the first difference information and first time will calculate To output of second time as the second time request message of time base source.It, should after the arrival of above-mentioned preset time point Second network equipment node, with the second difference information and first time, will be calculated the second time of time base source Output as the second time request message.

Due in embodiments of the present invention, can to the second time of the time base source of each second network equipment node into The synchronous calculating of row and output or asynchronous calculating and output, therefore improve the flexibility to the second time control.

As shown in figure 9, the time synchronizing method of sixth embodiment of the invention includes：

Step 401, receiving time difference information message, the time difference infomational message include difference information and for marking Know the sequence number of message transmission times；Difference information record has the of the first time and at least one time base source Time difference between two times；

Step 404, judge whether to receive difference information according to the sequence number；If so, performing step 402, if it is not, Then perform step 405；

Step 402, when obtaining described at least one according to the difference information received and first time calculating Between a reference source the second time；

Step 405, upstream network equipment node sends to retransmit the request message of difference information；

Wherein, the upstream network device node is the first of the second time for obtaining at least one time base source Network equipment node or the upstream network device node are transmitted for the difference information from the first network device node To the intermediary network device node of second network equipment node.

In the present embodiment, when receiving difference information, it will judge whether this can be received within the preset period Difference information, if not receiving the difference information, it will upstream network equipment node sends request message, to ask upstream Network equipment node retransmits the difference information.

Specifically, when above-mentioned difference information is sent for primary information, then detect whether to connect according to preset time point Receive the difference information.When above-mentioned difference information is sent for cycle information, then examined according to preset cycle time Whether survey receives above-mentioned difference information.Further, above-mentioned difference information may be used time difference infomational message and be sent out It send, includes sequence number in the time difference infomational message, can be determined whether to receive the newer time according to the sequence number Difference information message.It wherein, can be to first network equipment when above-mentioned difference information has not been obtained in the second network equipment node Node sends request message, can also appoint into network transmission path of the first network device node to the second network equipment node One intermediate network node sends request message.

As shown in Figure 10, the time synchronizing method of seventh embodiment of the invention includes：

Step 401, difference information is received；The difference information record has the first time and at least one time reference Time difference between second time in source；

Step 402, when obtaining described at least one according to the difference information received and first time calculating Between a reference source the second time；

Step 406, the difference information is forwarded.

In the present embodiment, it is above-mentioned the difference information is forwarded including：In the Single port of second network equipment When receiving the difference information, the forwarding port of second network equipment is determined according to preconfigured transmitting path；It will The difference information is forwarded to the forwarding port, passes through described forwarding other network equipment sections of port to the synchronizing network Point forwarding.

It is above-mentioned the difference information is forwarded including：The difference is received in the Single port of second network equipment During value information, the difference information is forwarded to other ports for not receiving identical difference information, to neighboring net-work device section Point forwarding.Specifically, second network equipment node includes multiple ports, when one of network port (hereinafter referred to as connects Receiving end mouth) when receiving difference information, then during preparing to forward, if other ports other than the receiving port were once Same difference information was received, then the port for receiving same difference information was not forwarded.If without other termination Mouth can be sent or other ports once received same difference information, then second network equipment node no longer turns Send out the message.

I.e. in the present embodiment, above-mentioned second network equipment can be used for the forwarding of difference information, can be used for second The calculating of time can be also used for the forwarding of the second time.In forwarding, the corresponding difference of multiple time base sources can be forwarded Information or the second time can also forward difference information or the second time of time base source.When calculating for the second time, The calculating of the second time of multiple time base sources can be carried out, the calculating of a time base source can also be carried out.It should be understood that It, then can not be to the difference that receives when network equipment node of above-mentioned second network equipment for the last one in transmission path Information is forwarded.

The time synchronizing method that eighth embodiment of the invention provides is applied to same based on what is synchronized at the first time The second network equipment node in network is walked, referring to Figure 11, which includes the following steps：

Step 1101, difference information is received；The difference information record has the first time and at least one time base Time difference between second time in quasi- source；

Step 1102, the difference information is forwarded.

In the embodiment of the present invention, above-mentioned difference information can by above-mentioned first network device node send difference information, Or the intermediary network device node transmission among above-mentioned first network device node and the second network equipment node when Between information, which can be the second network equipment node, or be only used for forwarding above-mentioned difference to believe The network equipment node of breath.Wherein, first network device node can obtain the second time and first time of time base source, And it carries out contrast conting and obtains the corresponding difference information of the time base source.Then the second network is directly or indirectly sent to set In slave node, after which receives above-mentioned difference information, it can be forwarded directly in downstream network device. I.e. in the present embodiment, above-mentioned second network equipment can be only used for difference information forwarding.In forwarding, when can forward multiple Between the corresponding difference information of a reference source, can also only forward the difference information of a time base source.

Specifically, in the present embodiment, it is above-mentioned the difference information is forwarded including：In second network equipment When Single port receives the difference information, the forwarding end of second network equipment is determined according to preconfigured transmitting path Mouthful；The difference information is forwarded to the forwarding port, passes through described forwarding other networks of port to the synchronizing network Device node forwards.

It is above-mentioned the difference information is forwarded including：The difference is received in the Single port of second network equipment During value information, the difference information is forwarded to other ports for not receiving identical difference information, passes through the forwarding port It is forwarded to neighboring net-work device node.Specifically, second network equipment node includes multiple ports, when one of network-side When mouth (hereinafter referred to as receiving port) receives difference information, then during preparing to forward, if in addition to the receiving port Other ports in addition once received same difference information, then the port for receiving same difference information were not turned Hair.

In the embodiment of the present invention, difference information is received；Difference information record have the first time with it is at least one Time difference between second time of time base source；According to preconfigured transmitting path, the difference information is turned Hair；Alternatively, the difference information is forwarded in the network equipment node adjacent with the second network equipment node.Due to cannot In the second network equipment node for directly acquiring the second time of time base source, by the second time for obtaining time base source It after the difference information of first time, is forwarded in each network equipment node according to the difference information, so as to by each network The second time of time base source is calculated in device node, so that all second nets in same synchronizing network Network device node can obtain the second time of time base source, thus solve transmitted in a synchronizing network it is different The problem of time reference.

The time synchronizing method that ninth embodiment of the invention provides is applied to same based on what is synchronized at the first time It walks in network, referring to Figure 12, which includes the following steps：

Step 1201, the first network device node in the synchronizing network obtains the second of at least one time base source Time；

Step 1202, the first network device node calculates the second time and the institute of at least one time base source State the difference information of first time；

Step 1203, the difference information is sent to other nets of the synchronizing network by the first network device node Network device node；

Step 1204, described other network equipment nodes receive difference information, forward the difference information and/or according to The difference information received and the first time, which calculate, obtains second time.

In the present embodiment, above-mentioned first network device node is the network equipment node that can obtain time base source, should First network device node can obtain the second time of one or more time base source, and can calculate respectively one or Second time of multiple time base sources and the difference information of first time, then by the second of one or more time base sources Time, corresponding difference information was sent to the second network equipment node.

Above-mentioned second network equipment node in the second time for receiving multiple time base sources corresponding difference information, It can only be forwarded, can also only carry out the calculating of the second time, calculating and the difference of the second time can also be carried out at the same time The output of information.Specifically, when carrying out difference information forwarding, when can forward the second of one or more time base source Between corresponding difference information；In the calculating for carrying out for the second time, the of one or more time base source can also be calculated Two times.

In the present embodiment, due to the second network equipment node in the second time that cannot directly acquire time base source and In other network equipment nodes of synchronizing network, by obtaining the second time of time base source and the difference information of first time Afterwards, the second time of time base source is calculated according to the difference information, so that in same synchronizing network All-network device node can obtain the second time of time base source, therefore solve and transmitted in a synchronizing network The problem of different time reference.

Referring to Figure 13, Figure 13 is the structure chart that the present invention the tenth implements the time synchronizing device provided, can be realized First to time synchronizing method in second embodiment details, and achieve the effect that identical.As shown in figure 13, time synchronization Processing unit 1300 is applied to based in the first network device node in the synchronizing network synchronized at the first time, including obtaining Modulus block 1301, the first computing module 1302 and difference information sending module 1303, wherein：

Acquisition module 1301, for obtaining the second time of at least one time base source；

First computing module 1302, for calculate the second time of at least one time base source with described first when Between difference information；

Difference information sending module 1303, other networks for the difference information to be sent to the synchronizing network are set Slave node.

Optionally, the difference information sending module 1303 is specifically used for：Every preset period of time or sending item When part is set up, by the second time corresponding difference information of at least one time base source currently obtained, it is sent to institute State other network equipment nodes of synchronizing network.

Optionally, the difference information sending module 1303 includes：

First message generation unit, for according to the second time pair of at least one time base source currently obtained The difference information and the identity information of the time base source answered；

First transmitting element, other networks for the time difference infomational message to be sent to the synchronizing network are set Slave node.

Optionally, the difference information sending module 1303 includes：

Second message generation unit, for according to the second time pair of at least one time base source currently obtained The difference information answered and the sequence number for identification message transmission times；

Second transmitting element, other networks for the time difference infomational message to be sent to the synchronizing network are set Slave node；So that other described network equipment nodes determine the sequence of the time difference infomational message according to the sequence number.

In this way, in the embodiment of the present invention, the second time of at least one time base source is obtained；It calculates described at least one Second time of time base source and the difference information of the first time；The difference information is sent to the synchronizing network Other network equipment nodes.Since each network equipment node in synchronizing network can be transmitted according to first network device node First time for using of difference information and synchronizing network, the second time of time base source is calculated, so as to when a set of In clock synchronization system, the scheme of different time transmission is realized, therefore is solved when transmitting different in a synchronizing network Between benchmark the problem of.

Referring to Figure 14, Figure 14 be the present invention the 11st implement provide time synchronizing device structure chart, Neng Goushi The details of time synchronizing method in existing third to the 7th embodiment, and achieve the effect that identical.As shown in figure 14, the time is same Processing unit 1400 is walked to be applied to based in the second network equipment node in the synchronizing network synchronized at the first time, including First receiving module 1401 and the second computing module 1402, wherein：

First receiving module 1401 receives difference information；The difference information record has the first time and at least one Time difference between second time of a time base source；

Second computing module 1402 obtains institute for being calculated according to the difference information and the first time that receive State the second time of at least one time base source.

Optionally, described device further includes：

Output module, for exporting the second time of at least one time base source to accessing second network The upstream device of device node.

Optionally, second computing module is specifically used for：When receiving the difference information, according to the institute received It states difference information and the first time calculates the second time for obtaining at least one time base source；Alternatively, when described When reaching preset time point at the first time, calculated according to the difference information received and the first time described in obtaining extremely Second time of a few time base source.

Optionally, first receiving module is specifically used for：Receiving time difference information message, the time difference information Message includes difference information and the sequence number for identification message transmission times；

Described device further includes：

Judgment module, for judging whether to receive difference information.

Optionally, described device further includes：

Request sending module, for when not receiving the difference information, upstream network equipment node transmission to be used for Retransmit the request message of difference information；

Wherein, the upstream network device node is the first of the second time for obtaining at least one time base source Network equipment node or the upstream network device node are transmitted for the difference information from the first network device node To the intermediary network device node of second network equipment node.

Optionally, described device further includes：First forwarding module, for being forwarded to the difference information.

Optionally, first forwarding module includes：

First determination unit, for when the Single port of second network equipment receives the difference information, according to Preconfigured transmitting path determines the forwarding port of second network equipment；

The difference information is forwarded to the forwarding port by the first retransmission unit, by the forwarding port to described Other network equipment nodes forwarding of synchronizing network.

Optionally, first forwarding module is specifically used for：It is received in the Single port of second network equipment described During difference information, the difference information is forwarded to other ports for not receiving identical difference information, passes through the forwarding end Mouth is forwarded to neighboring net-work device node.

In the embodiment of the present invention, difference information is received；Difference information record have the first time with it is at least one Time difference between second time of time base source；It is calculated and obtained according to the difference information received and the first time Obtain the second time of at least one time base source.Due to the of the second time that cannot directly acquire time base source In two network equipment nodes, after obtaining the second time of time base source and the difference information of first time, according to the difference The second time of time base source is calculated in value information, so that all second networks in same synchronizing network Device node can obtain the second time of time base source, therefore solve when transmitting different in a synchronizing network Between benchmark the problem of.

Referring to Figure 15, Figure 15 be the present invention the 12nd implement provide time synchronizing device structure chart, Neng Goushi The details of time synchronizing method in existing 8th embodiment, and achieve the effect that identical.As shown in figure 15, time synchronizing Device 1500 is applied to based in the second network equipment node in the synchronizing network synchronized at the first time, is connect including second 1501 and second forwarding module 1502 of module is received, wherein：

Second receiving module 1501, for receiving difference information；Difference information record have the first time with extremely Time difference between second time of a few time base source；

Second forwarding module 1502, for being forwarded to the difference information.

Optionally, second forwarding module includes：

Second determination unit, for when the Single port of second network equipment receives the difference information, according to Preconfigured transmitting path determines the forwarding port of second network equipment；

The difference information is forwarded to the forwarding port by the second retransmission unit, by the forwarding port to described Other network equipment nodes forwarding of synchronizing network.

Optionally, second forwarding module is specifically used for：It is received in the Single port of second network equipment described During difference information, the difference information is forwarded to other ports for not receiving identical difference information, passes through the forwarding end Mouth is forwarded to neighboring net-work device node.

In the embodiment of the present invention, difference information is received；Difference information record have the first time with it is at least one Time difference between second time of time base source；According to preconfigured transmitting path, the difference information is turned Hair；Alternatively, the difference information is forwarded in the network equipment node adjacent with the second network equipment node.Due to cannot In the second network equipment node for directly acquiring the second time of time base source, by the second time for obtaining time base source It after the difference information of first time, is forwarded in each network equipment node according to the difference information, so as to by each network The second time of time base source is calculated in device node, so that all second nets in same synchronizing network Network device node can obtain the second time of time base source, thus solve transmitted in a synchronizing network it is different The problem of time reference.

Referring to Figure 16, Figure 16 is the structure chart that the present invention the 13rd implements the synchronizing network provided, can realize that the 9th is real The details of time synchronizing method in example is applied, and is achieved the effect that identical.As shown in figure 16, synchronizing network 1600 is based on first Time synchronization, the synchronizing network 1600 includes 1601 and second network equipment node 1602 of first network device node, described First network device node 1601 includes：

Acquisition module 16011, for obtaining the second time of at least one time base source；

First computing module 16012, for calculating the second time of at least one time base source and described first The difference information of time；

Difference information sending module 16013, for the difference information to be sent to second network equipment node；

Second network equipment node 1602 includes：

First receiving module 16021 receives difference information；

Difference processing module 16022, for forwarding the difference information and/or the difference information according to receiving It is calculated with the first time and obtains second time.

In the present embodiment, due to the second network equipment node in the second time that cannot directly acquire time base source and In other network equipment nodes of synchronizing network, by obtaining the second time of time base source and the difference information of first time Afterwards, the second time of time base source is calculated according to the difference information, so that in same synchronizing network All-network device node can obtain the second time of time base source, therefore solve and transmitted in a synchronizing network The problem of different time reference.

Those of ordinary skill in the art may realize that each exemplary lists described with reference to the embodiments described herein Member and algorithm steps can be realized with the combination of electronic hardware or computer software and electronic hardware.These functions are actually It is performed with hardware or software mode, specific application and design constraint depending on technical solution.Professional technician Described function can be realized using distinct methods to each specific application, but this realization is it is not considered that exceed The scope of the present invention.

It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description, The specific work process of device and unit can refer to the corresponding process in preceding method embodiment, and details are not described herein.

In embodiment provided herein, it should be understood that disclosed device and method can pass through others Mode is realized.For example, the apparatus embodiments described above are merely exemplary, for example, the division of the unit, only A kind of division of logic function, can there is an other dividing mode in actual implementation, for example, multiple units or component can combine or Person is desirably integrated into another system or some features can be ignored or does not perform.Another point, shown or discussed is mutual Between coupling, direct-coupling or communication connection can be INDIRECT COUPLING or communication link by some interfaces, device or unit It connects, can be electrical, machinery or other forms.

The unit illustrated as separating component may or may not be physically separate, be shown as unit The component shown may or may not be physical unit, you can be located at a place or can also be distributed to multiple In network element.Some or all of unit therein can be selected according to the actual needs to realize the embodiment of the present invention Purpose.

In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, it can also That each unit is individually physically present, can also two or more units integrate in a unit.

If the function is realized in the form of SFU software functional unit and is independent product sale or in use, can be with It is stored in a computer read/write memory medium.Based on such understanding, technical scheme of the present invention is substantially in other words The part contribute to the prior art or the part of the technical solution can be embodied in the form of software product, the meter Calculation machine software product is stored in a storage medium, is used including some instructions so that a computer equipment (can be People's computer, server or network equipment etc.) perform all or part of the steps of the method according to each embodiment of the present invention. And aforementioned storage medium includes：USB flash disk, mobile hard disk, ROM, RAM, magnetic disc or CD etc. are various can to store program code Medium.

The above description is merely a specific embodiment, but protection scope of the present invention is not limited thereto, any Those familiar with the art in the technical scope disclosed by the present invention, can readily occur in change or replacement, should all contain Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be subject to the protection scope in claims.

Claims (32)

1. a kind of time synchronizing method, is set applied to based on the first network in the synchronizing network synchronized at the first time Slave node, which is characterized in that including：

Obtain the second time of at least one time base source；

Calculate the second time of at least one time base source and the difference information of the first time；

The difference information is sent to other network equipment nodes of the synchronizing network.

2. according to the method described in claim 1, it is characterized in that, described be sent to the synchronizing network by the difference information Other network equipment nodes the step of, including：

Every preset period of time or when the condition of transmission is set up, by least one time base source currently obtained Second time corresponding difference information is sent to other network equipment nodes of the synchronizing network.

3. the according to the method described in claim 2, it is characterized in that, at least one time reference that will currently obtain The second time corresponding difference information in source, other network equipment nodes for being sent to the synchronizing network include：

According to the second time corresponding difference information of at least one time base source currently obtained and the time base The identity information generated time difference information message in quasi- source；

The time difference infomational message is sent to other network equipment nodes of the synchronizing network.

4. the according to the method described in claim 2, it is characterized in that, at least one time reference that will currently obtain The second time corresponding difference information in source, other network equipment nodes for being sent to the synchronizing network include：

It is reported according to the second time corresponding difference information of at least one time base source currently obtained and for identifying The sequence number of literary transmission times；

The time difference infomational message is sent to other network equipment nodes of the synchronizing network；So that other described nets Network device node determines the sequence of the time difference infomational message according to the sequence number.

5. a kind of time synchronizing method is set applied to based on the second network in the synchronizing network synchronized at the first time In slave node, which is characterized in that including：

Receive difference information；The difference information record has the first time and the second time of at least one time base source Between time difference；

It is calculated according to the difference information received and the first time and obtains the of at least one time base source Two times.

6. the according to the method described in claim 5, it is characterized in that, difference information and described that the basis receives After one time calculated the step of the second time for obtaining at least one time base source, the method further includes：

Second time of at least one time base source is exported to the downstream for accessing second network equipment node and is set It is standby.

7. the according to the method described in claim 5, it is characterized in that, difference information and described that the basis receives One time calculated the step of the second time for obtaining at least one time base source, including：

When receiving the difference information, calculated according to the difference information received and the first time described in obtaining Second time of at least one time base source；Alternatively,

When the first time reaching preset time point, calculated according to the difference information received and the first time Obtain the second time of at least one time base source.

8. method according to any one of claims 5 to 7, which is characterized in that the reception difference information includes：It receives Time difference infomational message, the time difference infomational message include difference information and the sequence for identification message transmission times Number；

The method further includes：

Judge whether to receive difference information according to the sequence number.

9. according to the method described in claim 8, it is characterized in that, described judge whether to receive difference according to the sequence number After the step of information, the method further includes：

When not receiving the difference information, upstream network equipment node sends the request for retransmitting difference information Message；

Wherein, the upstream network device node is the first network for the second time for obtaining at least one time base source Device node or the upstream network device node are transmitted to institute for the difference information from the first network device node State the intermediary network device node of the second network equipment node.

10. method according to any one of claims 5 to 7, which is characterized in that the method further includes：

The difference information is forwarded.

11. according to the method described in claim 10, it is characterized in that, it is described the difference information is forwarded including：

When the Single port of second network equipment receives the difference information, determined according to preconfigured transmitting path The forwarding port of second network equipment；

The difference information is forwarded to the forwarding port, passes through described forwarding other networks of port to the synchronizing network Device node forwards.

12. according to the method described in claim 10, it is characterized in that, it is described the difference information is forwarded including：

When the Single port of second network equipment receives the difference information, the difference information is forwarded to and is not received To other ports of identical difference information, forwarded by other described ports to neighboring net-work device node.

13. a kind of time synchronizing method, applied to based on the second network in the synchronizing network synchronized at the first time In device node, which is characterized in that including：

Receive difference information；The difference information record has the first time and the second time of at least one time base source Between time difference；

The difference information is forwarded.

14. according to the method for claim 13, which is characterized in that it is described the difference information is forwarded including：

When the Single port of second network equipment receives the difference information, determined according to preconfigured transmitting path The forwarding port of second network equipment；

The difference information is forwarded to the forwarding port, passes through described forwarding other networks of port to the synchronizing network Device node forwards.

15. according to the method for claim 13, which is characterized in that it is described the difference information is forwarded including：

When the Single port of second network equipment receives the difference information, the difference information is forwarded to and is not received To other ports of identical difference information, forwarded by other described ports to neighboring net-work device node.

16. a kind of time synchronizing method, applied to based in the synchronizing network synchronized at the first time, feature exists In the time synchronizing method includes：

First network device node in the synchronizing network obtains the second time of at least one time base source；

The first network device node calculates the second time of at least one time base source and the first time Difference information；

The difference information is sent to other network equipment nodes of the synchronizing network by the first network device node；

Other described network equipment nodes receive difference information, forward the difference information and/or according to the difference received Value information and the first time, which calculate, obtains second time.

17. a kind of time synchronizing device, applied to based on the first network in the synchronizing network synchronized at the first time Device node, which is characterized in that including：

Acquisition module, for obtaining the second time of at least one time base source；

First computing module, for calculating the difference of the second time of at least one time base source and the first time Information；

Difference information sending module, for the difference information to be sent to other network equipment nodes of the synchronizing network.

18. device according to claim 17, which is characterized in that the difference information sending module is specifically used for：Every Preset period of time or when the condition of transmission is set up, the second time of at least one time base source that will currently obtain Corresponding difference information is sent to other network equipment nodes of the synchronizing network.

19. device according to claim 18, which is characterized in that the difference information sending module includes：

First message generation unit, for corresponding according to the second time of at least one time base source currently obtained The identity information of difference information and the time base source；

First transmitting element, for the time difference infomational message to be sent to other network equipment sections of the synchronizing network Point.

20. device according to claim 18, which is characterized in that the difference information sending module includes：

Second message generation unit, for corresponding according to the second time of at least one time base source currently obtained Difference information and the sequence number for identification message transmission times；

Second transmitting element, for the time difference infomational message to be sent to other network equipment sections of the synchronizing network Point；So that other described network equipment nodes determine the sequence of the time difference infomational message according to the sequence number.

21. a kind of time synchronizing device, applied to based on the second network in the synchronizing network synchronized at the first time In device node, which is characterized in that including：

First receiving module receives difference information；The difference information record has the first time and at least one time base Time difference between second time in quasi- source；

Second computing module, at least one according to the difference information received and first time calculating acquisition Second time of a time base source.

22. device according to claim 21, which is characterized in that described device further includes：

Output module, for exporting the second time of at least one time base source to accessing second network equipment The upstream device of node.

23. device according to claim 21, which is characterized in that second computing module is specifically used for：It is receiving During the difference information, calculated according to the difference information received and the first time and obtain at least one time Second time of a reference source；Alternatively, when the first time reaching preset time point, according to the difference information received The second time for obtaining at least one time base source is calculated with the first time.

24. the device according to any one of claim 21 to 23, which is characterized in that first receiving module is specifically used In：Receiving time difference information message, the time difference infomational message include difference information and are sent for identification message secondary Several sequence numbers；

Described device further includes：

Judgment module, for judging whether to receive difference information.

25. device according to claim 24, which is characterized in that described device further includes：

Request sending module, for when not receiving the difference information, upstream network equipment node to be sent for again Send the request message of difference information；

Wherein, the upstream network device node is the first network for the second time for obtaining at least one time base source Device node or the upstream network device node are transmitted to institute for the difference information from the first network device node State the intermediary network device node of the second network equipment node.

26. the device according to any one of claim 21 to 23, which is characterized in that described device further includes：First turn Module is sent out, for being forwarded to the difference information.

27. device according to claim 26, which is characterized in that first forwarding module includes：

First determination unit, for when the Single port of second network equipment receives the difference information, according to advance The transmitting path of configuration determines the forwarding port of second network equipment；

The difference information is forwarded to the forwarding port by the first retransmission unit, and port is forwarded to the synchronization by described Other network equipment nodes forwarding of network.

28. device according to claim 26, which is characterized in that first forwarding module is specifically used for：Described When the Single port of two network equipments receives the difference information, the difference information is forwarded to and does not receive identical difference letter Other ports of breath are forwarded by the forwarding port to neighboring net-work device node.

29. a kind of time synchronizing device, applied to based on the second network in the synchronizing network synchronized at the first time In device node, which is characterized in that including：

Second receiving module, for receiving difference information；Difference information record have the first time with it is at least one when Between a reference source the second time between time difference；

Second forwarding module is forwarded the difference information.

30. device according to claim 29, which is characterized in that second forwarding module includes：

Second determination unit, for when the Single port of second network equipment receives the difference information, according to advance The transmitting path of configuration determines the forwarding port of second network equipment；

The difference information is forwarded to the forwarding port by the second retransmission unit, and port is forwarded to the synchronization by described Other network equipment nodes forwarding of network.

31. device according to claim 29, which is characterized in that second forwarding module is specifically used for：Described When the Single port of two network equipments receives the difference information, the difference information is forwarded to and does not receive identical difference letter Other ports of breath are forwarded by other described ports to neighboring net-work device node.

32. a kind of synchronizing network, the synchronizing network is based on synchronous at the first time, which is characterized in that the synchronizing network includes First network device node and the second network equipment node, the first network device node include：

Acquisition module, for obtaining the second time of at least one time base source；

First computing module, for calculating the difference of the second time of at least one time base source and the first time Information；

Difference information sending module, for the difference information to be sent to second network equipment node；

Second network equipment node includes：

First receiving module receives difference information；

Difference processing module, for forwarding the difference information and/or according to the difference information received and described first Time, which calculates, obtains second time.