CN104796211B - Adjust differential clocks frequency approach, device, system and intercommunication modifier - Google Patents
Adjust differential clocks frequency approach, device, system and intercommunication modifier Download PDFInfo
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- CN104796211B CN104796211B CN201410020599.5A CN201410020599A CN104796211B CN 104796211 B CN104796211 B CN 104796211B CN 201410020599 A CN201410020599 A CN 201410020599A CN 104796211 B CN104796211 B CN 104796211B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/0635—Clock or time synchronisation in a network
- H04J3/0638—Clock or time synchronisation among nodes; Internode synchronisation
- H04J3/0658—Clock or time synchronisation among packet nodes
Abstract
The invention discloses method, apparatus, system, source equipment and the intercommunication modifiers of adjustment differential clocks frequency.This method comprises: receiving cbr (constant bit rate) CBR traffic packets message；It include the first differential frequency information corresponding with the first reference frequency that source equipment is supported in CBR traffic packets message；The first differential frequency information in CBR traffic packets message is converted into the second differential frequency information, second differential frequency information corresponds to the second reference frequency of egress equipment support, CBR traffic packets message comprising the second differential frequency information is sent to egress equipment, is handled by egress equipment.The problem of can not normally being restored present invention efficiently solves the inconsistent caused CBR business datum of reference frequency that distinct device uses.The present invention is made the recovery that can correctly carry out CBR business datum between two equipment for supporting different reference frequencies, is realized the intercommunication of differential clocks frequency, improve the accuracy of data recovery by the differential frequency information of modification CBR business datum.
Description
Technical field
The present invention relates to fields of communication technology, more particularly to a kind of method, apparatus, system for adjusting differential clocks frequency
With intercommunication modifier.
Background technique
Cbr (constant bit rate) (Constants Bit Rate, CBR) business in traditional network based on time division multiplex system,
A large amount of application has been obtained, and it is delayed, the characteristics such as shake and drift can be effectively guaranteed.But it is traditional
Based on transmission efficiency of the network of time division multiplex system for packet message agreement that is relatively low, and being interconnected between network
(Internet Protocol, IP) change is more and more obvious, and is necessarily faced and how to be transmitted CBR business datum in packet network
Problem.
The frequency of CBR business datum is different with the reference frequency of transmitting terminal and generates differential frequency, leads to CBR business datum
It needs to restore the clock (frequency) of CBR business datum in receiving end, can just access correct CBR business datum.Existing three
Kind clock recovery mode includes: again timing mode, differential clocks mode and self-adaptation clock mode.
Currently, the basic principle that differential clocks restore canonical algorithm is: being generated according to the reference frequency that source equipment uses
The differential frequency information of CBR business datum, and CBR business datum and its differential frequency information are sent to egress equipment, by place
End equipment goes out CBR business datum according to the differential frequency Information recovering received.Further, when carrying out clock recovery, only
Active end equipment is consistent with the reference frequency that egress equipment uses, and that is to say the differential clocks frequency of source equipment and egress equipment
Intercommunication could correctly restore CBR business datum.
But in actual network, the reference frequency that the equipment of different manufacturers uses is inconsistent, cause source equipment to
The differential frequency information of egress equipment transmission can not be used to normally parse CBR business datum, cause CBR business datum can not be by
It is normal to restore.
Summary of the invention
The technical problem to be solved by the present invention is to differential clocks frequency is realized between the equipment for supporting different reference frequencies
Intercommunication.Based on the above issues, the present invention provides it is a kind of adjust the method, apparatus of differential clocks frequency, system, source equipment and
Intercommunication modifier, to solve the prior art distinct device use reference frequency it is inconsistent, caused by CBR business datum without
The problem of method is normally restored.
In order to solve the above technical problems, the present invention is achieved through the following technical solutions.
The present invention provides a kind of methods for adjusting differential clocks frequency.The described method includes: receiving cbr (constant bit rate) CBR
Traffic packets message；It wherein, include the first reference frequency pair supported with the source equipment in the CBR traffic packets message
The the first differential frequency information answered；The first differential frequency information in the CBR traffic packets message is converted into the second difference
Frequency information, wherein the second differential frequency information corresponds to the second reference frequency of egress equipment support；It will be poor comprising second
The CBR traffic packets message of crossover rate information is sent to the egress equipment, is handled by the egress equipment, realizes difference
Clock frequency intercommunication.
The present invention provides a kind of devices for adjusting differential clocks frequency, comprising: receiving module, for receiving cbr (constant bit rate)
CBR traffic packets message；It wherein, include the first reference frequency supported with the source equipment in the CBR traffic packets message
The corresponding first differential frequency information of rate；Conversion module, for believing the first differential frequency in the CBR traffic packets message
Breath is converted to the second differential frequency information, wherein the second differential frequency information corresponds to the second reference of egress equipment support
Frequency；Sending module, for will include that the CBR traffic packets message of the second differential frequency information is sent to the egress equipment,
It is handled by the egress equipment, realizes the intercommunication of differential clocks frequency.
The present invention also provides a kind of intercommunication modifiers, comprising: packet message receiver, differential frequency modifier, grouping
Message transmitter, in which: packet message receiver, for receiving CBR traffic packets message；Wherein, the CBR traffic packets report
It include the first differential frequency information corresponding with the first reference frequency that the source equipment is supported in text；Differential frequency modification
Device, for the first differential frequency information in the CBR traffic packets message to be converted to the second differential frequency information, wherein
The second differential frequency information corresponds to the second reference frequency of egress equipment support；Packet message transmitter, for that will include
The CBR traffic packets message of second differential frequency information is sent to the egress equipment, is handled by the egress equipment, real
Existing differential clocks frequency intercommunication.
The present invention also provides a kind of source equipment, comprising: access device, for extracting CBR industry from CBR business data flow
Business data；Differential frequency information generator, for generating the first difference of the CBR business datum according to the first reference frequency
Frequency information；Packet message wrapper, for being CBR industry by the CBR business datum and its first differential frequency Information encapsulation
Business packet message.
The present invention also provides a kind of systems for adjusting differential clocks frequency, comprising: source equipment, adjustment differential clocks frequency
The device of rate, egress equipment；Wherein: source equipment, for generating cbr (constant bit rate) CBR traffic packets message；Wherein, described
It include the first differential frequency information corresponding with the first reference frequency that the source equipment is supported in CBR traffic packets message；
The device for adjusting differential clocks frequency, for the first differential frequency information in the CBR traffic packets message to be converted to the
Two differential frequency information, wherein the second differential frequency information corresponds to the second reference frequency of egress equipment support；Egress is set
It is standby, for restoring the CBR business datum in CBR traffic packets message based on the second reference frequency, realize that differential clocks frequency is mutual
It is logical.
The present invention has the beneficial effect that:
The present invention makes two equipment for supporting different reference frequencies by the differential frequency information of modification CBR business datum
Between can correctly carry out the recovery of CBR business datum, realize the differential clocks between the equipment for supporting different reference frequencies
The intercommunication of frequency improves the accuracy of data recovery.
Detailed description of the invention
Fig. 1 is the structure chart of the system of adjustment differential clocks frequency according to an embodiment of the invention；
Fig. 2 is the flow chart of the method for adjustment differential clocks frequency according to an embodiment of the invention；
Fig. 3 is the structure chart of the device of adjustment differential clocks frequency according to an embodiment of the invention.
Specific embodiment
In order to which the frequency point for solving prior art clock frequency is inconsistent, cause what CBR traffic frequencies can not normally restore to ask
Topic, the present invention provides method, apparatus, system and the source equipment of adjustment differential clocks frequency, below in conjunction with attached drawing and reality
Example is applied, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only used to explain this
Invention does not limit the present invention.
As shown in Figure 1, Fig. 1 is the structure chart of the system of adjustment differential clocks frequency according to an embodiment of the invention.
The system may include source equipment and egress equipment.CBR business datum passes through source equipment switching in packet network,
And the CBR business datum is received by packet network by egress equipment.Wherein, CBR business datum refers to cbr (constant bit rate) data, should
The bit number of cbr (constant bit rate) data transmission per second is fixed.
Source equipment can be used for generating cbr (constant bit rate) CBR traffic packets message；Wherein, in CBR traffic packets message
Including the first differential frequency information corresponding with the first reference frequency that source equipment is supported.Further, the CBR business datum
The first differential frequency information be differential frequency information that the first reference frequency for being supported according to source equipment generates.
Further, source equipment may include: access device, differential frequency information generator, packet message wrapper.
Access device can be with for extracting CBR business datum in the CBR business data flow.Further, access device
It can receive and parse CBR business data flow, and extract the business payload in CBR business data flow, and by business payload
Send packet message wrapper to.Business payload refers to part effective or substantive in CBR business data flow, the part number
CBR business datum can be referred to as according to (business payload).CBR business data flow can come from base station equipment.
Differential frequency information generator can be used for generating the first of the CBR business datum according to the first reference frequency
Differential frequency information.Further, differential frequency information generator first reference frequency according to used by source equipment,
The first differential frequency information of the CBR business datum is generated for the CBR business datum in packet message wrapper.Reference frequency
Refer to that the frequency that equipment (source equipment, egress equipment) is supported, the frequency can be used for counting, it can be by obtained counting
Value (frequency time stamp) embodies differential frequency information.
Packet message wrapper can be used for the CBR business datum and its first differential frequency Information encapsulation being CBR
Traffic packets message.Further, packet message wrapper can be according to the message encapsulation format of Packet Service, by CBR business
First differential frequency Information encapsulation of data and CBR business datum is at CBR traffic packets message.
Source equipment and egress equipment can support one or more reference frequencies.But when source equipment and egress
Equipment be not present identical reference frequency when, then for source equipment send CBR business datum, egress equipment can not correctly into
Row restores.For example, the reference frequency that source equipment is supported is 2.43MHz, the reference frequency that egress equipment is supported is 19.44MHz,
Then egress equipment can not be correctly with the differential frequency of frequency identification CBR traffic packets message identical with source equipment reference frequency
Information, will cause egress equipment in this way can not correctly recover CBR business number using the differential frequency information that source equipment generates
According to.
The present invention is supported not by providing the equipment (alternatively referred to as intercommunication modifier) of adjustment differential clocks frequency for system
With the intercommunication of the differential clocks frequency between the source equipment and egress equipment of reference frequency.In other words, source equipment and egress
Even if the reference frequency that equipment is supported is different, egress equipment can also be made correctly to parse CBR business number by intercommunication modifier
According to.
Based on above-mentioned intercommunication modifier, CBR traffic packets message can be sent to intercommunication modifier by source equipment.Mutually
Logical modifier can be used for the reference frequency supported according to source equipment and egress equipment, to the CBR traffic packets received
Differential frequency information in message is modified, and is sent to the CBR traffic packets message after differential frequency information is modified point
Group message transmitter, egress equipment.Wherein, modified differential frequency information corresponds to the reference frequency of egress equipment, that is to say
The reference frequency of egress equipment can be used modified differential frequency information and correctly restore CBR business datum.
Intercommunication modifier includes packet message receiver, differential frequency modifier, packet message transmitter.In source equipment
The packet message wrapper packet message receiver that can be used for being sent to CBR traffic packets message in intercommunication modifier,
Packet message receiver can receive the CBR traffic packets message from packet message wrapper, and differential frequency modifier can be with
It, will be in CBR traffic packets message according to the transfer algorithm between the differential frequency information under pre-set different reference frequencies
The first differential frequency information be converted to the second differential frequency information, wherein the second differential frequency information corresponds to egress equipment branch
The second reference frequency held.The CBR traffic packets message for modifying differential frequency information is sent to place by packet message transmitter
End equipment.
Egress equipment can be used for receiving the CBR traffic packets message for coming from intercommunication modifier (packet message transmitter),
And the CBR business datum in CBR traffic packets message is restored based on the second reference frequency, realize the intercommunication of differential clocks frequency.
Further, egress equipment may include: packet message parsing wrapper, differential clocks frequency recoverer, send
Device.
Packet message decapsulator can be with, for extracting CBR business datum and second poor in CBR traffic packets message
Crossover rate information.Further, packet message wrapper can receive CBR traffic packets message, and according to the report of Packet Service
Literary encapsulation format extracts CBR business datum and the second differential frequency information.The second differential frequency information is repaired by intercommunication
The differential frequency information for changing the modification of device and matching with the second reference frequency of egress equipment.
Differential frequency restorer can be used for according to the second differential frequency Information recovering CBR traffic packets message extracted
In CBR business datum.Further, differential frequency restorer can be according to the CBR traffic packets for carrying differential frequency information
Message recovers CBR business data flow.
The CBR business data flow that transmitter can be used for recover is sent to destination, such as base station.
Further, intercommunication modifier can be located at source equipment (not shown), can also be located at egress equipment and (not show
Out), (as shown in Figure 1) is may be located on the path of packet network.
The concrete function of the various pieces of system described in Fig. 1 can be with a kind of adjustment differential clocks frequency of the reference pair present invention
The specific descriptions of method.As shown in Fig. 2, Fig. 2 is the stream of the method for adjustment differential clocks frequency according to an embodiment of the invention
Cheng Tu.
Step S210 receives cbr (constant bit rate) CBR traffic packets message；Wherein, in CBR traffic packets message include and source
The corresponding first differential frequency information of the first reference frequency that end equipment is supported.
The first reference frequency that source equipment is supported according to it generates the first differential frequency information of CBR business datum, and
It is CBR traffic packets message by CBR business datum and its first differential frequency Information encapsulation.
Specifically, access device can extract CBR business by parsing CBR business data flow in CBR business data flow
Data that is to say the business payload extracted in CBR business data flow, which can be referred to as CBR business datum.Example
Such as: the CBR business data flow uses Synchronous Digital Hierarchy (Synchronous Digital Hierarchy, SDH) technology, then
Access device can parse CBR business data flow according to the respective standard of SDH technology, remove useless in CBR business data flow
Data, such as: section overhead；The business payload in CBR business data flow is obtained, such as: being really used in path overhead and net load area
The data of transmission.
The first reference frequency that differential frequency information generator is supported according to source equipment generates CBR business datum
First differential frequency information.Specifically, differential frequency information generator carries out Continuous accumulation counting according to the first reference frequency,
Obtain count value.Corresponding count value is as the first differential frequency of CBR business datum when can be using extraction CBR business datum
Information.Such as: added up according to clock cycle of reference frequency that source equipment uses every a clock cycle, when
When extracting CBR business datum in CBR business data flow, then using current count value as the CBR business datum extracted, by this
Differential frequency information of the count value as the CBR business datum extracted.
CBR business datum and its first differential frequency Information encapsulation can be CBR traffic packets by packet message wrapper
Message.Specifically, packet message wrapper can be according to the message encapsulation format of Packet Service, by CBR business datum and CBR
First differential frequency Information encapsulation of business datum is at CBR traffic packets message.It is possible to further by CBR business datum and
First differential frequency information of CBR business datum is individually positioned in the respective field of packet message encapsulation format, with realization pair
The encapsulation of CBR business datum and its first differential frequency information.In general, a CBR traffic packets message need to only carry a frequency
Rate time stab information (differential frequency information) can be fixed in quasi- encapsulation CBR traffic packets message using CBR business datum
The frequency time stab information of the bit in predetermined position, the differential frequency information as the CBR traffic packets message.The CBR business point
Group message can be transmitted in packet network.
In one embodiment, if source equipment supports one or more reference frequencies, packet message wrapper can be with
A label is preset for each reference frequency.It, can be by the mark of the first reference frequency when encapsulating CBR also packet message
First differential frequency Information encapsulation of label, CBR business datum and the CBR business datum generated according to first reference frequency
In CBR traffic packets message.By the Tag Packaging of the first reference frequency in CBR traffic packets message, intercommunication can be made to repair
Change device by identifying the label of reference frequency to determine that the reference frequency is the first reference frequency.For example, the first reference frequency
Label be 01, if intercommunication modifier identification outgoing label be 01, can determine that reference frequency is the first reference frequency.
Packaged CBR traffic packets message can be sent to intercommunication modifier, intercommunication modification by packet message wrapper
Packet message receiver in device receives the CBR traffic packets message, and differential frequency modifier will be in CBR traffic packets message
First differential frequency information is revised as the utilizable second differential frequency information of egress equipment.
The first differential frequency information in CBR traffic packets message is converted to the second differential frequency information by step S220,
Wherein, the second differential frequency information corresponds to the second reference frequency of egress equipment support.
Specifically, the message encapsulation format of differential frequency modifier in intercommunication modifier according to Packet Service, in CBR
The first differential frequency information of CBR business datum is extracted in traffic packets message.It is possible to further for placing difference frequency
It is found in the field of rate information and extracts the first differential frequency information.The first differential frequency information can be a counting
Value.
The conversion between the differential frequency information under different reference frequencies can be being preset in differential frequency modifier
Algorithm.The transfer algorithm between differential frequency information under different reference frequencies refers to: by what is generated according to the first reference frequency
First differential frequency information is converted into the second differential frequency that can be generated based on the second reference frequency by preset algorithm and believed
Breath.
Such as: the first reference frequency is 2.43MHz, and the second reference frequency is 19.44MHz, then being obtained according to 2.43MHz
The first differential frequency information and the second differential frequency information for being obtained according to 19.44MHz between transformational relation may is that by
The binary numeral of first differential frequency information moves to left three and in original position zero padding, can be by the first differential frequency information
It changes and switchs to the second differential frequency information.Such as: the first differential frequency information is 0001, this 0001 is moved to left three trailing zeros and can be obtained
It is 1000 to the second differential frequency information.
Differential frequency modifier believes the differential frequency information in CBR traffic packets message from original first differential frequency
Breath is revised as the second differential frequency information, and the CBR traffic packets message after the modification differential frequency information is passed through grouping report
Literary transmitter is sent to egress equipment.
In one embodiment, differential frequency modifier can be determined and be generated according to the label in CBR traffic packets message
First reference frequency of the first differential frequency information in CBR traffic packets message.It to be reached according to CBR traffic packets message
Egress equipment, obtain the second reference frequency for being supported of egress equipment；Wherein second reference frequency is for restoring corresponding the
The CBR business datum of two differential frequency information.The second ginseng is converted by the corresponding first differential frequency information of the first reference frequency
Examine the corresponding second differential frequency information of frequency.Further, one or more is preset in differential frequency modifier not
With the transfer algorithm between the differential frequency information under reference frequency.In one or more transfer algorithms, inquiry is joined first
The algorithm that the corresponding first differential frequency information of frequency is converted into the corresponding second differential frequency information of the second reference frequency is examined, it will
First differential frequency information is converted into the second differential frequency information.In other words, the present invention is incited somebody to action in differential frequency modifier
The reference frequency information of source equipment is converted into the reference frequency information of egress equipment, the differential frequency letter for generating source equipment
Breath, is converted into the differential frequency information for being equivalent to and obtaining according to the reference frequency of egress equipment in differential frequency modifier, with
Just egress equipment can correctly parse the differential frequency information of CBR business datum, accurately recover CBR business datum.
CBR traffic packets message comprising the second differential frequency information is sent to egress equipment, by egress by step S230
Equipment is handled.
CBR traffic packets message is sent to egress equipment, egress equipment after intercommunication modifier will modify differential frequency information
Restore the CBR business datum in CBR traffic packets message based on the second reference frequency, realizes the intercommunication of differential clocks frequency.
Packet message decapsulator can extract CBR business datum and CBR according to the message encapsulation format of Packet Service
Second differential frequency information of business datum.Specifically, according to the message encapsulation format of Packet Service, CBR business datum and
Second differential frequency information of CBR business datum is respectively in CBR traffic packets message in corresponding field, packet message solution
Wrapper can extract the second differential frequency information of CBR business datum and CBR business datum in corresponding field.Into one
Step ground, the second differential frequency information of the CBR business datum is obtained from the modification by intercommunication modifier, from original the
One differential frequency information, which is converted into egress equipment, can be used in the second differential frequency information for correctly restoring CBR business datum.
Differential frequency restorer can restore CBR business datum according to the second differential frequency information extracted.Further
Ground, differential frequency restorer can go out CBR business data flow according to the differential frequency Information recovering extracted.
Transmitter can send the CBR business data flow recovered, such as be sent to base station.
The present invention can make two supporting the equipment of different difference frequency points just by providing differential frequency information mutual communication modifier
Traffic frequencies recovery is really carried out, solves the problems, such as intercommunication caused by the difference frequency point difference that distinct device is supported.
The present invention also provides a kind of devices for adjusting differential clocks frequency.As shown in figure 3, Fig. 3 is according to the present invention one
The flow chart of the device of the adjustment differential clocks frequency of embodiment.
The device is the intercommunication modifier in the embodiment of the present invention.
It in the apparatus may include receiving module 310, conversion module 320, sending module 330.
Receiving module 310 can be used for receiving cbr (constant bit rate) CBR traffic packets message；Wherein, in CBR traffic packets report
It include the first differential frequency information corresponding with the first reference frequency that source equipment is supported in text；CBR traffic packets message is also
Including the CBR business datum extracted in CBR business data flow.
Conversion module 320, it is poor to can be used for the first differential frequency information in CBR traffic packets message being converted to second
Crossover rate information, wherein the second differential frequency information corresponds to the second reference frequency of egress equipment support.
For generating the source equipment of CBR traffic packets message, it is also used to: presets one for each first reference frequency
A label；By the label of the first reference frequency, CBR business datum and its first differential frequency Information encapsulation in CBR traffic packets
In message.
Conversion module 320, is also used to: according to the label in CBR traffic packets message, determining in CBR traffic packets message
Corresponding first reference frequency of the first differential frequency information；Obtain second reference frequency that egress equipment is supported；Its
In the second reference frequency be used to restore the CBR business datum of corresponding second differential frequency information；First reference frequency is corresponding
First differential frequency information is converted into the corresponding second differential frequency information of the second reference frequency.
Sending module 330, for will include that the CBR traffic packets message of the second differential frequency information is sent to the egress
Equipment is handled by the egress equipment, realizes the intercommunication of differential clocks frequency.
Since the function that the device of the present embodiment is realized essentially corresponds to earlier figures 1 to embodiment of the method shown in Fig. 2,
Therefore not detailed place in the description of the present embodiment, it may refer to the related description in previous embodiment, this will not be repeated here.
The present invention can modify the differential frequency information of CBR business datum by offer differential frequency information mutual communication modifier,
Make the recovery that can correctly carry out CBR business datum between two equipment for supporting different reference frequencies, it is different to realize support
The intercommunication of differential clocks frequency between the equipment of reference frequency improves the accuracy of data recovery.But it is naturally not limited to
Above embodiment, without departing from the spirit and scope of the present invention, anyone skilled in the art is in this hair
In the technical scope of bright exposure, any changes or substitutions that can be easily thought of, should all fall within the scope and spirit of the invention.
Although for illustrative purposes, the preferred embodiment of the present invention has been disclosed, those skilled in the art will recognize
It is various improve, increase and replace be also it is possible, therefore, the scope of the present invention should be not limited to the above embodiments.
Claims (10)
1. a kind of method for adjusting differential clocks frequency characterized by comprising
Receive cbr (constant bit rate) CBR traffic packets message；It wherein, include being supported with source equipment in the CBR traffic packets message
The corresponding first differential frequency information of the first reference frequency；
The first differential frequency information in the CBR traffic packets message is converted into the second differential frequency information, wherein described
Second differential frequency information corresponds to the second reference frequency of egress equipment support；
CBR traffic packets message comprising the second differential frequency information is sent to the egress equipment, by the egress equipment
It is handled, realizes the intercommunication of differential clocks frequency.
2. the method as described in claim 1, which is characterized in that include for each first ginseng in the CBR traffic packets message
The CBR business datum examining the pre-set label of frequency and being extracted from CBR business data flow.
3. method according to claim 2, which is characterized in that by the first differential frequency in the CBR traffic packets message
Information is converted to the second differential frequency information, further includes:
According to the label, determine the first differential frequency information corresponding first in the CBR traffic packets message with reference to frequency
Rate；
Obtain the second reference frequency that the egress equipment is supported；Wherein second reference frequency is for restoring corresponding second
The CBR business datum of differential frequency information；
Second reference frequency corresponding second is converted by the corresponding first differential frequency information of first reference frequency
Differential frequency information.
4. a kind of device for adjusting differential clocks frequency characterized by comprising
Receiving module, for receiving cbr (constant bit rate) CBR traffic packets message；Wherein, include in the CBR traffic packets message with
The corresponding first differential frequency information of the first reference frequency that source equipment is supported；
Conversion module, for the first differential frequency information in the CBR traffic packets message to be converted to the second differential frequency
Information, wherein the second differential frequency information corresponds to the second reference frequency of egress equipment support；
Sending module, for will include that the CBR traffic packets message of the second differential frequency information is sent to the egress equipment, by
The egress equipment is handled, and realizes the intercommunication of differential clocks frequency.
5. device as claimed in claim 4, which is characterized in that include for each first ginseng in the CBR traffic packets message
The CBR business datum examining the pre-set label of frequency and being extracted from CBR business data flow.
6. device as claimed in claim 5, which is characterized in that the conversion module is also used to:
According to the label, determine the first differential frequency information corresponding first in the CBR traffic packets message with reference to frequency
Rate；
Obtain second reference frequency that the egress equipment is supported；Wherein second reference frequency is for restoring corresponding
The CBR business datum of second differential frequency information；
Second reference frequency corresponding second is converted by the corresponding first differential frequency information of first reference frequency
Differential frequency information.
7. a kind of intercommunication modifier characterized by comprising packet message receiver, differential frequency modifier, packet message hair
Send device, in which:
Packet message receiver, for receiving CBR traffic packets message；Wherein, include in the CBR traffic packets message and source
The corresponding first differential frequency information of the first reference frequency that end equipment is supported；
Differential frequency modifier, it is poor for the first differential frequency information in the CBR traffic packets message to be converted to second
Crossover rate information, wherein the second differential frequency information corresponds to the second reference frequency of egress equipment support；
Packet message transmitter, for will include that the CBR traffic packets message of the second differential frequency information is sent to the egress
Equipment is handled by the egress equipment, realizes the intercommunication of differential clocks frequency.
8. intercommunication modifier as claimed in claim 7, which is characterized in that it is each for including in the CBR traffic packets message
The pre-set label of first reference frequency and the CBR business datum extracted from CBR business data flow.
9. intercommunication modifier as claimed in claim 8, which is characterized in that the differential frequency modifier is also used to:
According to the label, determine the first differential frequency information corresponding first in the CBR traffic packets message with reference to frequency
Rate；
Obtain second reference frequency that the egress equipment is supported；Wherein second reference frequency is for restoring corresponding
The CBR business datum of second differential frequency information；
Second reference frequency corresponding second is converted by the corresponding first differential frequency information of first reference frequency
Differential frequency information.
10. a kind of system for adjusting differential clocks frequency characterized by comprising source equipment adjusts differential clocks frequency
Device, egress equipment；Wherein:
Source equipment, for generating cbr (constant bit rate) CBR traffic packets message；Wherein, include in the CBR traffic packets message
The first differential frequency information corresponding with the first reference frequency that the source equipment is supported；
The device for adjusting differential clocks frequency, for converting the first differential frequency information in the CBR traffic packets message
For the second differential frequency information, wherein the second differential frequency information corresponds to the second reference frequency of egress equipment support；
Egress equipment realizes difference for restoring the CBR business datum in CBR traffic packets message based on the second reference frequency
Clock frequency intercommunication.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410020599.5A CN104796211B (en) | 2014-01-16 | 2014-01-16 | Adjust differential clocks frequency approach, device, system and intercommunication modifier |
| PCT/CN2014/076410 WO2015106504A1 (en) | 2014-01-16 | 2014-04-28 | Method, device and system for adjusting differential clock frequency, source end device and interworking modifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410020599.5A CN104796211B (en) | 2014-01-16 | 2014-01-16 | Adjust differential clocks frequency approach, device, system and intercommunication modifier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104796211A CN104796211A (en) | 2015-07-22 |
| CN104796211B true CN104796211B (en) | 2019-01-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410020599.5A Active CN104796211B (en) | 2014-01-16 | 2014-01-16 | Adjust differential clocks frequency approach, device, system and intercommunication modifier |
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| Country | Link |
|---|---|
| CN (1) | CN104796211B (en) |
| WO (1) | WO2015106504A1 (en) |
Citations (1)
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| CN102655437A (en) * | 2011-03-03 | 2012-09-05 | 中兴通讯股份有限公司 | Difference clock recovery method and device |
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| GB9419611D0 (en) * | 1994-09-29 | 1994-11-16 | Plessey Telecomm | Constant bit rate synchronisation |
| GB0205350D0 (en) * | 2002-03-07 | 2002-04-24 | Zarlink Semiconductor Inc | Clock synchronisation over a packet network using SRTS without a common network clock |
| CN100499436C (en) * | 2003-08-14 | 2009-06-10 | 华为技术有限公司 | Transmission method for realizing multi-port arbitrary rate integration |
| US8542708B1 (en) * | 2009-11-30 | 2013-09-24 | Pmc-Sierra Us, Inc. | Method and system for transporting constant bit rate clients across a packet interface |
| CN102655469B (en) * | 2011-03-01 | 2016-08-10 | 中兴通讯股份有限公司 | A kind of network equipment realizing differential clock equipment communication and system and method |
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