CN101741853A - Method for synchronizing clock time, line card veneer and network equipment - Google Patents
Method for synchronizing clock time, line card veneer and network equipment Download PDFInfo
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- CN101741853A CN101741853A CN200910253977A CN200910253977A CN101741853A CN 101741853 A CN101741853 A CN 101741853A CN 200910253977 A CN200910253977 A CN 200910253977A CN 200910253977 A CN200910253977 A CN 200910253977A CN 101741853 A CN101741853 A CN 101741853A
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Abstract
The invention discloses a method for synchronizing clock time, a line card veneer and network equipment. The method comprises the following steps that: the line card veneer receives a time clock signal of a predetermined format, wherein the time clock signal comprises a clock signal and a time signal; and the predetermined format is a format which meets the requirement of a first network protocol; and the line card veneer regulates a local clock of the line card veneer according to the clock signal, regulates a local time value of the line card veneer according to the time signal, and forwards the time clock signal. The local clock is regulated according to the clock signal and the local time value is regulated according to the time signal, so related code implementation is less, and the method can simplify processing procedures, effectively reduce time delay of synchronization, avoid occupying a large amount of system resources, improve the efficiency of clock time synchronization, and ensure high accuracy of time synchronization by directly regulating the local clock and the local time value.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of method, line card veneer and network equipment of synchronizing clock time.
Background technology
The network integration is to adopt the technology of general opening to realize merging, thereby reaches the purpose that makes full use of resource, enhances the competitiveness, and makes the user enjoy personalized service by simple mode.In present network, operator provides full-service operation by uniform way to the user, thereby improves the market share and profit.Along with the development of the network integration, Internet protocol (Internet Protocol abbreviates IP as) technology is in new networking, and shared leading position is more and more obvious, and has been called the inexorable trend of following fusion development.
Ethernet based on the IP technology relies on characteristics such as simple, open, flexible, can merge voice, video and data communication, and become the construction thinking of current main-stream.In the process of carrying out the network integration, the transparent transmission of ethernet clock is the key factor that telecom operators need consider, also is a crucial difficult problem.This is because the many application on the network all have the inherent sequential requirement of the Network Synchronization of depending on, and there is different demands in different service application to clock synchronization, for example, time division multiplexing (TimeDivision Multiplexing at traditional fixed network, abbreviate TDM as) when business is passed through Ethernet bearing,, then be very easy to cause slip if the clock at bearer network two ends is inconsistent, cause TDM voice and data traffic transmission deterioration, even can make service disconnection.
Communication network is mainly reflected in the wireless application the demand of clock frequency, at IP Radio Access Network (Radio Access Network, abbreviate RAN as) in, the frequency between the different base station must be synchronously in certain accuracy rating, otherwise the problem that business goes offline can appear when switching in the base station.And at PDH (Pseudo-synchronous Digital Hierarchy) (Plesiochronous Digital Hierarchy abbreviates PDH as)/synchronous digital hierarchy (Synchronous Digital Hierarchy, abbreviate SDH as) in the communication system, clock synchronization is to guarantee that voice-and-data connects the key design factor of reliable and zero defect, although the PDH/SDH network shifts to packet-based IP/Ethernet framework, the requirement of network clocking can't change.
Under the trend of the whole network IPization, clock synchronization issue has become crucial technical bottleneck.Only on the IP/Ethernet network, successfully solve the problem of clock synchronization, just might build a multi-service UNE truly based on the IP technology.
1588v2 is the clock standard of being formulated by AAEE (IEEE), in this standard, has defined packet network and has realized the synchronous technology of Time And Frequency.At TD SDMA (TimeDivision-Synchronous Code Division Multiple Access, abbreviate TD-SCDMA as) under the standard, and the mobile network is to Long Term Evolution (Long Term Evolution, abbreviating LTE as) after the system evolved, time synchronized has become the essential condition that promotes wireless frequency spectrum efficient.
In existing Time synchronization technique, the 1588v2 Clock Synchronization Technology efficiently solves GPS (Global Position System) (Global Positioning System, abbreviating GPS as) the clock input cost is big and difficult problem is installed, and is the basis of mobile network to LTE evolution.IEEE 1588v2 has proposed Precision Time Protocol (Precision Time Protocol abbreviates PTP as), and it comes down to a kind of principal and subordinate's synchro system.In the synchronizing process of system, master clock cycle issue PTP time synchronization protocol and time information, receive the timestamp information that the master clock port is sent from clock port, system calculates principal and subordinate's circuit time delay and principal and subordinate's time difference in view of the above, and utilize this time difference to adjust local zone time, make the slave unit time keep frequency and the phase place consistent with the main equipment time.IEEE 1588 can realize Frequency Synchronization and time synchronized simultaneously.Wherein, the accuracy guarantee of time transmission mainly depends on the symmetry of counter frequency accuracy and link.
At present, the thinking of arranging net of mobile operator is: as initial clock source, carrying online operation IEEE 1588v2 whole net time of protocol synchronization and clock can also be changed out GPS at network end-point and supply with equipment uses such as base station by GPS.The time synchronized of GPS and IEEE 1588v2 (time conversion) generally just can realize by certain software and hardware system, but currently used time synchronized scheme often needs to spend the long processing time and take more system resources, thereby reduced the efficient of synchronizing clock time, thereby and the professional problem of normally carrying out of the synchronously untimely influence of meeting time of occurrence, and, under other procotol amalgamation modes, there is similar problem equally.
, system resource long at the time synchronizing time between the heterogeneous networks in the correlation technique takies the problem that causes business normally to carry out more, does not propose effective solution at present as yet.
Summary of the invention
, system resource long at the time synchronizing time between the heterogeneous networks in the correlation technique takies the problem that causes business normally to carry out more, the present invention proposes a kind of method, line card veneer and network equipment of synchronizing clock time, can effectively improve the efficient of synchronizing clock time, reduce taking of system resource, avoid the time synchronized long time synchronized that causes consuming time that business is caused dysgenic problem.
Technical scheme of the present invention is achieved in that
A kind of method of synchronizing clock time is provided according to an aspect of the present invention.
Method according to synchronizing clock time of the present invention comprises: line card veneer receives the time clock signal of predetermined format, and wherein, the time clock signal comprises clock signal and time signal, and predetermined format is meant the form of the requirement that meets first procotol; Line card veneer is adjusted the local clock of line card veneer according to clock signal, adjusts the local zone time value of line card veneer according to time signal, and forwarding time clock signal.
Wherein, line card veneer specifically comprises according to the processing of the local clock of clock signal adjustment line card veneer: line card veneer is provided with local clock according to clock signal, makes local clock and clock signal after being provided with synchronous.
In addition, the processing that line card veneer is adjusted the local zone time value of line card veneer according to time signal specifically comprises: line card veneer is determined time value in the time signal and the difference between the local zone time value, and according to difference correction local zone time.
Further, the time clock signal also comprises heartbeat signal, and before the local zone time value of adjusting line card veneer, this method also can comprise: line card veneer is determined the frequency of the local zone time value of adjustment line card veneer according to heartbeat signal.
On the one hand, the step of the time clock signal of line card veneer reception predetermined format is specially: line card veneer receives the time clock signal from the master control veneer transmission of the veneer place network equipment; The time clock signal that master control veneer sends is: the time clock signal of the requirement that meets first procotol after the time clock conversion of signals of the requirement that meets second procotol that master control veneer is received.At this moment, the processing of line card veneer forwarding time clock signal specifically comprises: line card veneer sends to the time clock signal upstream device that adopts first procotol.
On the other hand, the time clock Signal Processing of line card veneer reception predetermined format is specifically as follows: line card veneer receives the time clock signal that sends from the upstream equipment that adopts first procotol.At this moment, the processing of line card veneer forwarding time clock signal specifically comprises: line card veneer is given the time clock signal forwarding master control veneer of the ply-yarn drill place network equipment, and be the time clock signal that meets the requirement of second procotol by master control veneer with the time clock conversion of signals, and the time clock signal after will changing sends to the upstream device that adopts second procotol.
And, in the network equipment at line card veneer place, comprise under the situation of a plurality of line card veneers, line card veneer is further given the time clock signal forwarding other line card veneers in the network equipment, carries out local clock adjustment and the adjustment of local zone time value for other line card veneers.
According to a further aspect in the invention, provide a kind of line card veneer.
Line card veneer according to the present invention comprises: receiver module, be used to receive the time clock signal of predetermined format, and wherein, predetermined format is meant the form of the requirement that meets first procotol; First adjusting module is used for the local clock according to the clock signal adjustment line card veneer of time clock signal; Second adjusting module is used for the local zone time value according to the time signal adjustment line card veneer of time clock signal; Forwarding module is used for the forwarding time clock signal.
According on the one hand of the present invention, a kind of network equipment also is provided, this network equipment comprises at least one line card veneer and master control veneer.
Particularly, line card veneer comprises: receiver module, be used to receive the time clock signal of predetermined format, and wherein, predetermined format is meant the form of the requirement that meets first procotol; First adjusting module is used for the local clock according to the clock signal adjustment line card veneer of time clock signal; Second adjusting module is used for the local zone time value according to the time signal adjustment line card veneer of time clock signal; Forwarding module is used for the forwarding time clock signal.
Master control veneer comprises: the conversion process module, the time clock conversion of signals that is used for the requirement that meets second procotol of its reception is the time clock signal that meets the requirement of first procotol, and the time clock signal after will changing sends to line card veneer; And the time clock conversion of signals that is used for the requirement that meets first procotol that line card veneer is transmitted is the time clock signal that meets the requirement of second procotol, and sends to the equipment that adopts second procotol.
Wherein, the time clock signal also comprises heartbeat signal, and heartbeat signal is used for determining to adjust the frequency of local zone time value, and second adjusting module is used for adjusting the local zone time value according to the frequency of determining.
The present invention is by carrying out the adjustment of local clock according to clock signal, and adjusts the local zone time value according to time signal, and related code is realized less, can simplify processing procedure, effectively reduce synchronous time delay, avoid taking a large amount of system resources, improve the efficient of synchronizing clock time; And, can make time synchronized have higher accuracy by directly adjusting local clock and local zone time value.
Description of drawings
Fig. 1 is the flow chart according to the method for the synchronizing clock time of the inventive method embodiment;
Fig. 2 is according to the processing schematic diagram from the GPS network to 1588V2 network latency clock signal in the method for the synchronizing clock time of the inventive method embodiment;
Fig. 3 is according to the process chart that carries out synchronizing clock time in the method for the synchronizing clock time of the inventive method embodiment from the GPS network to 1588V2 network latency clock signal process;
Fig. 4 is according to the processing schematic diagram from the 1588V2 network to GPS network latency clock signal in the method for the synchronizing clock time of the inventive method embodiment;
Fig. 5 is according to the process chart that carries out synchronizing clock time in the method for the synchronizing clock time of the inventive method embodiment from the 1588V2 network to GPS network latency clock signal process.
Embodiment
, system resource long at the time synchronizing time between the heterogeneous networks in the correlation technique takies the problem that causes business normally to carry out more, the present invention proposes, in the network equipments such as rack, boxlike, line card veneer carries out the local clock adjustment according to clock signal, and according to time signal adjustment local zone time value, can be with the time synchronized between the simple processing mode realization heterogeneous networks, improved the efficient of synchronizing clock time, reduce taking of system resource, avoid the time synchronized long time synchronized that causes consuming time that business is caused dysgenic problem.
Below in conjunction with accompanying drawing, describe embodiments of the invention in detail.
Method embodiment
A kind of method of synchronizing clock time is provided in the present embodiment.
As shown in Figure 1, the method according to the synchronizing clock time of present embodiment comprises:
Step S101, line card veneer receives the time clock signal of predetermined format, wherein, the time clock signal comprises clock signal (bitclock) and time signal (timecode) (time signal can be understood as the step-length that clock is advanced), and predetermined format is meant the form of the requirement that meets first procotol;
Step S103, line card veneer is adjusted the local clock of line card veneer according to clock signal, adjusts the local zone time value of line card veneer according to time signal, and forwarding time clock signal.
By above-mentioned processing, owing to only need to carry out the adjustment of local clock according to clock signal, and adjust the local zone time value according to time signal, so processing procedure is comparatively simple, related code quantity is less, can effectively reduce time delay, avoid taking a large amount of system resources, improve the efficient of synchronizing clock time; And, can make time synchronized have higher accuracy by directly adjusting local clock and local zone time value.
Wherein, can further include heartbeat signal (heartbeat) in the time clock signal, in this article, clock signal, time signal and heartbeat signal are referred to as the bsc bus signals, this bsc bus signals is by the bsc bus transfer.
Particularly, in step S103, when line card veneer was adjusted local clock according to clock signal, line card veneer can directly be provided with local clock according to clock signal, makes local clock and clock signal after being provided with synchronous.When line card veneer was adjusted the local zone time value according to time signal, line card veneer can be determined time value in the time signal and the difference between the local zone time value, and according to difference correction local zone time.In actual applications, line card veneer can directly use clock signal (bitclock) as local clock, and the time value in the quick time for reading signal (timecode) in high-frequency ground, thereby the time value that reads made comparisons with local time value revise local time value, by using this revised time, line card veneer just can be finished the time synchronized with upstream device.Wherein, the line card veneer frequency that reads the time signal (timecode) in the bsc bus signals and adjust the local zone time value can be determined according to the heartbeat signal in the bsc bus signals (heartbeat).Therefore, according to different time synchronized demands, can adjust heartbeat signal flexibly, thereby adjust the synchronous execution frequency of local zone time, under to the very high situation of time synchronized real-time, line card veneer can be fast, high-frequency ground time for reading signal from the bsc bus signals carries out the local zone time adjustment, guarantees the real-time of time synchronized.
In addition, in the present invention, the time clock signal that line card veneer receives may be from the network that adopts first procotol, also may be from the network that adopts second procotol.
Under the situation of time clock signal from the network that adopts second procotol, the master control veneer of this line card veneer place network equipment can at first receive this time clock signal, afterwards, master control veneer need be the time clock signal that meets the requirement of first procotol with the time clock conversion of signals of the requirement that meets second procotol that receives, and the time clock signal after will changing sends to line card veneer via backboard.And line card veneer needs this time clock signal is sent to the upstream device that adopts first procotol.
On the other hand, under the situation of time clock signal from the network that adopts first procotol, when carrying out the time clock signal forwarding, line card veneer need be transmitted to master control veneer in the network equipment of line card veneer place via backboard with the time clock signal, is to send to the upstream device that adopts second procotol after meeting the signal that second procotol requires by master control veneer with this time clock conversion of signals.
In the network equipment, comprise under the situation of a plurality of line card veneers, at this moment, receive line card veneer from the time clock signal of the network that adopts first procotol and need further this time clock signal forwarding to be given other line card veneers in the network equipment, carry out local clock adjustment and the adjustment of local zone time value for other line card veneers, the process of its adjustment no longer repeats here with the described adjustment process of integrating step S103 is similar before.
Above-mentioned processing procedure of the present invention can realize the time synchronized between the multiple network.
To be that example is described with the time synchronized between the network of the network that adopts the 1588V2 agreement and employing GPS (Global Position System) agreement below.
At this moment, above-mentioned first procotol is meant the 1588V2 agreement, and second procotol is meant the GPS (Global Position System) agreement.
As shown in Figure 2, the transmission course of signal from the GPS network to the 1588V2 network, from the GPS input signal of GPS network at first from receiving by master control veneer, master control veneer converts gps signal to 1588V2 agreement operable hearbeat by the GPS modular converter of configuration on it, bitclock, three signals of timecode are (corresponding to the time clock signal of above mentioning that first procotol requires that meets, promptly, the bsc bus signals), the bsc bus signals can be exported to line card veneer by backboard, on line card veneer, can directly use bitclock as local clock, thereby and from the bsc bus signals, read fast the timecode value and and local time value make comparisons and revise local time value, at last, line card veneer can carry out the output of 1588V2 signal (message), wherein, the device synchronization time can be used this revised time to line card veneer downstream.Wherein, adjustment of the time on the line card veneer and clock adjustment can be carried out by the 1588V2 module of special configuration on the line card veneer.
As shown in Figure 3, the processing of synchronizing clock time specifically may further comprise the steps the transmission course of signal from the GPS network to the 1588V2 network:
In the opposite direction, promptly, at 1588 networks on the direction of GPS network, as shown in Figure 4, line card veneer can receive meet the 1588V2 protocol requirement the time clock signal (promptly, 1588V2 signal (message input)), by the bsc bus with synchronous time clock signal export to place equipment master control veneer the GPS modular converter and, if comprise a plurality of line card veneers (promptly in this equipment, in rack-mount unit), this line card veneer also needs this time clock signal (bsc bus signals) is exported to other line card veneer, time and clock that other line card veneer can use bsc to transmit, and carry out 1588V2 signal (message) output.After receiving the time clock signal from this line card veneer, the GPS modular converter of master control veneer need convert the bsc bus signals to gps signal, exports to the equipment that GPS need be used in the downstream.
As shown in Figure 5, the processing of synchronizing clock time specifically may further comprise the steps the transmission course of signal from the 1588V2 network to the GPS network:
By above-mentioned processing, owing to only need to carry out the adjustment of local clock according to clock signal, and adjust the local zone time value according to time signal, so processing procedure is comparatively simple, the realization of code seldom, can effectively reduce time delay, avoid taking a large amount of system resources, improve the efficient of synchronizing clock time; And, can make time synchronized have higher accuracy by directly adjusting local clock and local zone time value; By determine the frequency that time value is obtained and revised according to heartbeat signal, can make time synchronization process have better real-time property and mobile type, from adapting to the demand of miscellaneous service; In addition, GPS is connected by the bsc bus with 1588V2, and bsc bus signals and gps signal can be realized conversion by FPGA hardware, therefore realize that cost is lower.
Device embodiment
In the present embodiment, provide a kind of line card veneer.
Particularly, can comprise according to the line card veneer of the embodiment of the invention: receiver module, be used to receive the time clock signal of predetermined format, wherein, predetermined format is meant the form of the requirement that meets first procotol; First adjusting module is connected to receiver module, is used for adjusting according to the clock signal of time clock signal the local clock of line card veneer; Second adjusting module is connected to receiver module, is used for adjusting according to the time signal of time clock signal the local zone time value of line card veneer; Forwarding module is connected to receiver module, is used for the forwarding time clock signal.
And the time clock signal that is received by receiver module can also comprise heartbeat signal, and heartbeat signal is used for determining to adjust the frequency of local zone time value, and second adjusting module is used for adjusting the local zone time value according to the frequency of determining.
In addition, the present invention also provides a kind of network equipment, and the network equipment according to the present invention comprises at least one above-mentioned line card veneer and master control veneer, and wherein, the structure of line card veneer is described, and no longer repeats here.
Master control veneer according to the present invention comprises: the conversion process module, the time clock conversion of signals that is used for the requirement that meets second procotol that master control veneer is received is the time clock signal that meets the requirement of first procotol, and the time clock signal after will changing sends to line card veneer; And the time clock conversion of signals that is used for the requirement that meets first procotol that line card veneer is transmitted is the time clock signal that meets the requirement of second procotol, and sends to the equipment that adopts second procotol.
Line card veneer is given master control veneer with the time clock signal forwarding under the situation of the time clock signal that receives from the upstream equipment that adopts first procotol.
By the said equipment and line card veneer, owing to only need to carry out the adjustment of local clock according to clock signal, and adjust the local zone time value according to time signal, so processing procedure is comparatively simple, related code quantity is less, can effectively reduce time delay, avoid taking a large amount of system resources, improve the efficient of synchronizing clock time; And, can make time synchronized have higher accuracy by directly adjusting local clock and local zone time value.
Particularly, in the above-mentioned line card veneer and the network equipment, when adjusting local clock according to clock signal, first adjusting module in the line card veneer can directly be provided with local clock according to clock signal, makes local clock and clock signal after being provided with synchronous.When adjusting the local zone time value according to time signal, second adjusting module of line card veneer can be determined time value in the time signal and the difference between the local zone time value, and according to difference correction local zone time.In actual applications, line card veneer can directly use clock signal (bitclock) as local clock, and the time value in the quick time for reading signal (timecode) in high-frequency ground, thereby the time value that reads made comparisons with local time value revise local time value, by using this revised time, line card veneer just can be finished the time synchronized with upstream device.Wherein, the line card veneer frequency that reads the time signal (timecode) in the bsc bus signals and adjust the local zone time value can be determined according to the heartbeat signal in the bsc bus signals (heartbeat).Therefore, according to different time synchronized demands, can adjust heartbeat signal flexibly, thereby adjust the synchronous execution frequency of local zone time, under to the very high situation of time synchronized real-time, line card veneer can be fast, high-frequency ground time for reading signal from the bsc bus signals carries out the local zone time adjustment, guarantees the real-time of time synchronized.
The above-mentioned network equipment of the present invention and line card veneer can be realized the time synchronized between the multiple network equally, and for example, first procotol can be the 1588V2 agreement, and second procotol can be the GPS (Global Position System) agreement.
And, can realize equally that according to the network equipment and the line card veneer of present embodiment Fig. 1 to the time synchronizing shown in Figure 5 and the protocol conversion and the forwarding of data, describes before its detailed process, no longer repeat here.
In sum, by means of technique scheme of the present invention, by carry out the adjustment of local clock according to clock signal, and adjust the local zone time value according to time signal, so processing procedure is comparatively simple, the realization of code seldom can effectively reduce time delay, avoid taking a large amount of system resources, improve the efficient of synchronizing clock time; And, can make time synchronized have higher accuracy by directly adjusting local clock and local zone time value; By determine the frequency that time value is obtained and revised according to heartbeat signal, can make time synchronization process have better real-time property and mobile type, from adapting to the demand of miscellaneous service; In addition, GPS is connected by the bsc bus with 1588V2, and bsc bus signals and gps signal can be realized conversion by FPGA hardware, therefore realize that cost is lower.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the method for a synchronizing clock time is characterized in that, described method comprises:
Line card veneer receives the time clock signal of predetermined format, and wherein, described time clock signal comprises clock signal and time signal, and described predetermined format is meant the form of the requirement that meets first procotol;
Described line card veneer is adjusted the local clock of described line card veneer according to described clock signal, adjusts the local zone time value of described line card veneer according to described time signal, and transmits described time clock signal.
2. method according to claim 1 is characterized in that, the processing that described line card veneer is adjusted the local clock of described line card veneer according to described clock signal specifically comprises:
Described line card veneer is provided with described local clock according to described clock signal, makes described local clock and described clock signal after being provided with synchronous.
3. method according to claim 1 is characterized in that, the processing that described line card veneer is adjusted the local zone time value of described line card veneer according to described time signal specifically comprises:
Described line card veneer is determined time value in the described time signal and the difference between the described local zone time value, and according to the described local zone time of described difference correction.
4. method according to claim 1 is characterized in that, described time clock signal also comprises heartbeat signal, before the local zone time value of adjusting described line card veneer, also comprises:
Described line card veneer is determined the frequency of the local zone time value of the described line card veneer of adjustment according to described heartbeat signal.
5. method according to claim 1 is characterized in that, the step that described line card veneer receives the time clock signal of predetermined format is specially:
Described line card veneer receives the time clock signal from the master control veneer transmission of the described veneer place network equipment; The time clock signal that described master control veneer sends is: the time clock signal of the requirement that meets described first procotol after the time clock conversion of signals of the requirement that meets second procotol that described master control veneer is received;
And described line card veneer is transmitted described time clock Signal Processing and is specifically comprised:
Described line card veneer sends to described time clock signal the upstream device that adopts described first procotol.
6. method according to claim 1 is characterized in that, the time clock Signal Processing that described line card veneer receives predetermined format is specially:
Described line card veneer receives the time clock signal that sends from the upstream equipment that adopts described first procotol;
And described line card veneer is transmitted described time clock Signal Processing and is specifically comprised:
Described line card veneer is given described time clock signal forwarding the master control veneer of the described ply-yarn drill place network equipment, and be the time clock signal that meets the requirement of second procotol by described master control veneer with described time clock conversion of signals, and the described time clock signal after will changing sends to the upstream device that adopts described second procotol.
7. method according to claim 6, it is characterized in that, in the network equipment at described line card veneer place, comprise under the situation of a plurality of line card veneers, described line card veneer is further given described time clock signal forwarding other line card veneers in the described network equipment, carries out local clock adjustment and the adjustment of local zone time value for described other line card veneers.
8. a line card veneer is characterized in that, comprising:
Receiver module is used to receive the time clock signal of predetermined format, and wherein, described predetermined format is meant the form of the requirement that meets first procotol;
First adjusting module is used for adjusting according to the clock signal of described time clock signal the local clock of described line card veneer;
Second adjusting module is used for adjusting according to the time signal of described time clock signal the local zone time value of described line card veneer;
Forwarding module is used to transmit described time clock signal.
9. a network equipment is characterized in that, comprises at least one line card veneer and master control veneer, wherein,
Described line card veneer comprises:
Receiver module is used to receive the time clock signal of predetermined format, and wherein, described predetermined format is meant the form of the requirement that meets first procotol;
First adjusting module is used for adjusting according to the clock signal of described time clock signal the local clock of described line card veneer;
Second adjusting module is used for adjusting according to the time signal of described time clock signal the local zone time value of described line card veneer;
Forwarding module is used to transmit described time clock signal;
Described master control veneer comprises:
The conversion process module, the time clock conversion of signals that is used for the requirement that meets second procotol that described master control veneer is received is the time clock signal that meets the requirement of first procotol, and the described time clock signal after will changing sends to described line card veneer; And the time clock conversion of signals that is used for the requirement that meets described first procotol that described line card veneer is transmitted is the time clock signal that meets the requirement of described second procotol, and sends to the equipment that adopts described second procotol.
10. the network equipment according to claim 9, it is characterized in that, described time clock signal also comprises heartbeat signal, described heartbeat signal is used for determining to adjust the frequency of described local zone time value, and described second adjusting module is used for adjusting described local zone time value according to the described frequency of determining.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101986595A (en) * | 2010-11-01 | 2011-03-16 | 中兴通讯股份有限公司 | Time synchronization method and nodes |
| CN102142954A (en) * | 2010-11-30 | 2011-08-03 | 中兴通讯股份有限公司 | Time synchronization method and equipment in rack |
| CN102546144A (en) * | 2010-12-30 | 2012-07-04 | 上海贝尔股份有限公司 | Method and device for synchronizing information |
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