CN104796211A - Method, device and system for differential clock frequency adjusting, source end equipment, and interworking modifier - Google Patents
Method, device and system for differential clock frequency adjusting, source end equipment, and interworking modifier Download PDFInfo
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- CN104796211A CN104796211A CN201410020599.5A CN201410020599A CN104796211A CN 104796211 A CN104796211 A CN 104796211A CN 201410020599 A CN201410020599 A CN 201410020599A CN 104796211 A CN104796211 A CN 104796211A
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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
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Abstract
The invention discloses a method, a device and a system for differential clock frequency adjusting, a piece of source end equipment, and an interworking modifier. The method comprises the following steps: receiving a constant bit rate CBR service packet message which includes first differential frequency information corresponding to a first reference frequency supported by a piece of source end equipment; converting the first differential frequency information in the CBR service packet message into second differential frequency information which corresponds to a second reference frequency supported by a piece of destination end equipment; and sending the CBR service packet message containing the second differential frequency information to the destination end equipment for processing. The problem that CBR service data cannot be recovered normally due to the fact that the reference frequencies adopted by different equipment are inconsistent is solved. By modifying differential frequency information of CBR service data, CBR service data cannot be recovered correctly between two pieces of equipment supporting different reference frequencies, interworking of differential clock frequencies is realized, and the accuracy of data recovery is improved.
Description
Technical field
The present invention relates to communication technical field, particularly relate to a kind of method, device, system, source equipment and the intercommunication modifier that adjust differential clocks frequency.
Background technology
Cbr (constant bit rate) (Constants Bit Rate, CBR) business based in the network of time division multiplex system, has obtained a large amount of application traditional, and its time delay, the characteristics such as jitter and wander can be effectively guaranteed.But traditional network based on time division multiplex system is lower for the transmission efficiency of packet message, and the agreement interconnected between network (Internet Protocol, IP) change more and more obvious, the problem how transmitting CBR business datum in packet network must be faced.
The frequency of CBR business datum is different with the reference frequency of transmitting terminal and produce differential frequency, causes CBR business datum needs to recover the clock (frequency) of CBR business datum at receiving terminal, can obtain correct CBR business datum.Existing three kinds of clock recovery modes comprise: timing mode again, differential clocks pattern and self-adaptation clock pattern.
At present, the general principle that differential clocks recovers canonical algorithm is: according to the differential frequency information of the reference frequency generation CBR business datum that source equipment adopts, and CBR business datum and differential frequency information thereof are sent to egress equipment, go out CBR business datum by egress equipment according to the differential frequency Information recovering received.Further, when carrying out clock recovery, only having source equipment consistent with the reference frequency that egress equipment adopts, that is to say the differential clocks frequency intercommunication of source equipment and egress equipment, correctly could recover CBR business datum.
But in the network of reality, the reference frequency that the equipment of different manufacturers adopts is inconsistent, causes source equipment cannot be used to normally resolve CBR business datum to the differential frequency information that egress equipment transmits, causes CBR business datum normally to be recovered.
Summary of the invention
The technical problem to be solved in the present invention realizes the intercommunication of differential clocks frequency between the equipment supporting different reference frequency.Based on the problems referred to above; the invention provides a kind of method, device, system, source equipment and the intercommunication modifier that adjust differential clocks frequency; reference frequency in order to solve the employing of prior art distinct device is inconsistent, and the CBR business datum caused cannot by the problem normally recovered.
For solving the problems of the technologies described above, the present invention is achieved through the following technical solutions.
The invention provides a kind of adjust differential clocks frequency method.Described method comprises: receive cbr (constant bit rate) CBR traffic packets message; Wherein, described CBR traffic packets message comprises the first differential frequency information corresponding with the first reference frequency that described source equipment is supported; The first differential frequency information in described CBR traffic packets message is converted to the second differential frequency information, wherein, the second reference frequency that the corresponding egress equipment of described second differential frequency information is supported; The CBR traffic packets message comprising the second differential frequency information is sent to described egress equipment, is processed by described egress equipment, realize the intercommunication of differential clocks frequency.
The invention provides a kind of device adjusting differential clocks frequency, comprising: receiver module, for receiving cbr (constant bit rate) CBR traffic packets message; Wherein, described CBR traffic packets message comprises the first differential frequency information corresponding with the first reference frequency that described source equipment is supported; Modular converter, for the first differential frequency information in described CBR traffic packets message is converted to the second differential frequency information, wherein, the second reference frequency that the corresponding egress equipment of described second differential frequency information is supported; Sending module, for the CBR traffic packets message comprising the second differential frequency information is sent to described egress equipment, is processed by described egress equipment, realizes the intercommunication of differential clocks frequency.
Present invention also offers a kind of intercommunication modifier, comprising: packet message receiver, differential frequency modifier, packet message transmitter, wherein: packet message receiver, for receiving CBR traffic packets message; Wherein, described CBR traffic packets message comprises the first differential frequency information corresponding with the first reference frequency that described source equipment is supported; Differential frequency modifier, for the first differential frequency information in described CBR traffic packets message is converted to the second differential frequency information, wherein, the second reference frequency that the corresponding egress equipment of described second differential frequency information is supported; Packet message transmitter, for the CBR traffic packets message comprising the second differential frequency information is sent to described egress equipment, is processed by described egress equipment, realizes the intercommunication of differential clocks frequency.
Present invention also offers a kind of source equipment, comprising: access device, for extracting CBR business datum from CBR business data flow; Differential frequency information generator, for according to the first reference frequency, generates the first differential frequency information of described CBR business datum; Packet message wrapper, for being CBR traffic packets message by described CBR business datum and the first differential frequency Information encapsulation thereof.
Present invention also offers a kind of system adjusting differential clocks frequency, comprising: device, the egress equipment of source equipment, adjustment differential clocks frequency; Wherein: source equipment, for generating cbr (constant bit rate) CBR traffic packets message; Wherein, the first differential frequency information corresponding with the first reference frequency that described source equipment is supported is comprised at described CBR traffic packets message; The device of adjustment differential clocks frequency, for the first differential frequency information in described CBR traffic packets message is converted to the second differential frequency information, wherein, the second reference frequency that the corresponding egress equipment of described second differential frequency information is supported; Egress equipment, for recovering the CBR business datum in CBR traffic packets message based on the second reference frequency, realizes the intercommunication of differential clocks frequency.
Beneficial effect of the present invention is as follows:
The present invention is by the differential frequency information of amendment CBR business datum, make two recoveries supporting can correctly carry out between the equipment of different reference frequency CBR business datum, achieve the intercommunication of the differential clocks frequency between the equipment supporting different reference frequency, improve the accuracy of date restoring.
Accompanying drawing explanation
Fig. 1 is the structure chart of the system adjusting differential clocks frequency according to an embodiment of the invention;
Fig. 2 is the flow chart of the method adjusting differential clocks frequency according to an embodiment of the invention;
Fig. 3 is the structure chart of the device adjusting differential clocks frequency according to an embodiment of the invention.
Embodiment
In order to the frequency solving prior art clock frequency is inconsistent; cause the problem that CBR traffic frequencies cannot normally be recovered; the invention provides the method for adjustment differential clocks frequency, device, system and source equipment, below in conjunction with accompanying drawing and embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, do not limit the present invention.
As shown in Figure 1, Fig. 1 is the structure chart of the system adjusting differential clocks frequency according to an embodiment of the invention.
This system can comprise source equipment and egress equipment.CBR business datum by source equipment access packet network, and receives this CBR business datum by egress equipment by packet network.Wherein, CBR business datum refers to cbr (constant bit rate) data, and the bit number of these cbr (constant bit rate) data transmission per second is fixed.
Source equipment may be used for generating cbr (constant bit rate) CBR traffic packets message; Wherein, the first differential frequency information corresponding with the first reference frequency that source equipment is supported is comprised at CBR traffic packets message.Further, the first differential frequency information of this CBR business datum is the differential frequency information that the first reference frequency supported according to source equipment generates.
Further, source equipment can comprise: access device, differential frequency information generator, packet message wrapper.
Access device is passable, in described CBR business data flow, extracts CBR business datum.Further, access device can receive and resolve CBR business data flow, and extracts the business payload in CBR business data flow, and sends business payload to packet message wrapper.Business payload refers to effective in CBR business data flow or substantial part, and this partial data (business payload) can be referred to as CBR business datum.CBR business data flow can from base station equipment.
Differential frequency information generator may be used for according to the first reference frequency, generates the first differential frequency information of described CBR business datum.Further, the first reference frequency that differential frequency information generator can adopt according to source equipment, generates the first differential frequency information of this CBR business datum for the CBR business datum in packet message wrapper.Reference frequency refers to that the frequency that equipment (source equipment, egress equipment) is supported, this frequency may be used for counting, can embody differential frequency information by the count value (frequency time stamp) obtained.
It is CBR traffic packets message that packet message wrapper may be used for described CBR business datum and the first differential frequency Information encapsulation thereof.Further, CBR business datum according to the message encapsulation format of Packet Service, can be become CBR traffic packets message with the first differential frequency Information encapsulation of CBR business datum by packet message wrapper.
Source equipment and egress equipment all can support one or more reference frequency.But when source equipment and egress equipment do not exist identical reference frequency, then for the CBR business datum that source equipment sends, egress equipment cannot correctly recover.Such as, the reference frequency of source equipment support is 2.43MHz, the reference frequency of egress equipment support is 19.44MHz, then egress equipment cannot correctly with the differential frequency information of the frequency identification CBR traffic packets message identical with source equipment reference frequency, and the differential frequency information that can cause egress equipment that source equipment cannot be utilized to generate so correctly recovers CBR business datum.
The present invention, by providing the equipment (also can be described as intercommunication modifier) of adjustment differential clocks frequency for system, supports the intercommunication of the differential clocks frequency between the source equipment of different reference frequency and egress equipment.In other words, even if source equipment is different with the reference frequency that egress equipment is supported, also egress equipment can be made correctly to parse CBR business datum by intercommunication modifier.
Based on above-mentioned intercommunication modifier, CBR traffic packets message can be sent to intercommunication modifier by source equipment.Intercommunication modifier may be used for the reference frequency supported according to source equipment and egress equipment, differential frequency information in the CBR traffic packets message received is modified, and the CBR traffic packets message after amendment differential frequency information is sent to packet message transmitter, egress equipment.Wherein, the reference frequency of the corresponding egress equipment of amended differential frequency information, that is to say that the reference frequency of egress equipment can use amended differential frequency information correctly to recover CBR business datum.
Intercommunication modifier comprises packet message receiver, differential frequency modifier, packet message transmitter.Packet message wrapper in source equipment may be used for the packet message receiver be sent to by CBR traffic packets message in intercommunication modifier, packet message receiver can receive the CBR traffic packets message from packet message wrapper, differential frequency modifier can according to the transfer algorithm between the differential frequency information under the different reference frequencies pre-set, the first differential frequency information in CBR traffic packets message is converted to the second differential frequency information, wherein, the second reference frequency of the corresponding egress equipment support of the second differential frequency information.The CBR traffic packets message revising differential frequency information is sent to egress equipment by packet message transmitter.
Egress equipment may be used for receiving the CBR traffic packets message from intercommunication modifier (packet message transmitter), and recovers the CBR business datum in CBR traffic packets message based on the second reference frequency, realizes the intercommunication of differential clocks frequency.
Further, egress equipment can comprise: packet message resolves wrapper, differential clocks frequency recoverer, transmitter.
Packet message decapsulator is passable, for extracting CBR business datum and the second differential frequency information in CBR traffic packets message.Further, packet message wrapper can receive CBR traffic packets message, and extracts CBR business datum and the second differential frequency information according to the message encapsulation format of Packet Service.This second differential frequency information is through the amendment of intercommunication modifier and the differential frequency information matched with the second reference frequency of egress equipment.
Differential frequency restorer may be used for according to the CBR business datum in the second differential frequency Information recovering CBR traffic packets message extracted.Further, differential frequency restorer can recover CBR business data flow according to the CBR traffic packets message carrying differential frequency information.
Transmitter may be used for the CBR business data flow recovered to be sent to destination, as base station.
Further, intercommunication modifier can be positioned at source equipment (not shown), also can be positioned at egress equipment (not shown), can also be positioned at (as shown in Figure 1) on the path of packet network.
The concrete function of the various piece of system described in Fig. 1 can with reference to a kind of specific descriptions adjusting the method for differential clocks frequency of the present invention.As shown in Figure 2, Fig. 2 is the flow chart of the method adjusting differential clocks frequency according to an embodiment of the invention.
Step S210, receives cbr (constant bit rate) CBR traffic packets message; Wherein, the first differential frequency information corresponding with the first reference frequency that source equipment is supported is comprised at CBR traffic packets message.
The first reference frequency that source equipment is supported according to it, generates the first differential frequency information of CBR business datum, and is CBR traffic packets message by CBR business datum and the first differential frequency Information encapsulation thereof.
Specifically, access device is by resolving CBR business data flow, and can extract CBR business datum in CBR business data flow, that is to say the business payload extracted in CBR business data flow, this business payload can be referred to as CBR business datum.Such as: this CBR business data flow adopts synchronous digital hierarchy (Synchronous Digital Hierarchy, SDH) technology, then access device according to the respective standard of SDH technology, can resolve CBR business data flow, remove the useless data in CBR business data flow, as: section overhead; Obtain the business payload in CBR business data flow, as the real data for transmitting in: path overhead and net load district.
The first reference frequency that differential frequency information generator is supported according to source equipment, generates the first differential frequency information of CBR business datum.Specifically, differential frequency information generator carries out Continuous accumulation counting according to the first reference frequency, obtains count value.Can using the first differential frequency information of count value corresponding during extraction CBR business datum as CBR business datum.Such as: according to the clock cycle of the reference frequency that source equipment adopts, every a clock cycle, add up, when extracting CBR business datum in CBR business data flow, then using current count value as the CBR business datum extracted, using the differential frequency information of this count value as the CBR business datum extracted.
CBR business datum and the first differential frequency Information encapsulation thereof can be CBR traffic packets message by packet message wrapper.Specifically, CBR business datum according to the message encapsulation format of Packet Service, can be become CBR traffic packets message with the first differential frequency Information encapsulation of CBR business datum by packet message wrapper.Further, can the first differential frequency information of CBR business datum and CBR business datum be placed in the respective field of packet message encapsulation format respectively, to realize the encapsulation to CBR business datum and the first differential frequency information thereof.Usually, a CBR traffic packets message only need carry a frequency time stab information (differential frequency information), can in plan encapsulation CBR traffic packets message, the fixing frequency time stab information using the bit in the precalculated position of CBR business datum, as the differential frequency information of this CBR traffic packets message.This CBR traffic packets message can transmit in packet network.
In one embodiment, if source equipment supports one or more reference frequency, then packet message wrapper can pre-set a label for each reference frequency.Encapsulate CBR also packet message time, can by the label of the first reference frequency, CBR business datum and the first differential frequency Information encapsulation of CBR business datum generated according to described first reference frequency in CBR traffic packets message.By the Tag Packaging of the first reference frequency in CBR traffic packets message, intercommunication modifier can be made by identifying that the label of reference frequency determines that this reference frequency is the first reference frequency.Such as, the label of the first reference frequency is 01, if it is 01 that intercommunication modifier identifies label, then can determine that reference frequency is the first reference frequency.
Packaged CBR traffic packets message can be sent to intercommunication modifier by packet message wrapper, packet message receiver in intercommunication modifier receives this CBR traffic packets message, and the first differential frequency information in CBR traffic packets message is revised as the utilizable second differential frequency information of egress equipment by differential frequency modifier.
Step S220, is converted to the second differential frequency information by the first differential frequency information in CBR traffic packets message, wherein, and the second reference frequency that the corresponding egress equipment of the second differential frequency information is supported.
Specifically, the differential frequency modifier in intercommunication modifier, according to the message encapsulation format of Packet Service, extracts the first differential frequency information of CBR business datum in CBR traffic packets message.Further, can find in the field for placing differential frequency information and extract this first differential frequency information.This first differential frequency information can be a count value.
The transfer algorithm between the differential frequency information under different reference frequency can be pre-set in differential frequency modifier.Transfer algorithm between differential frequency information under different reference frequency refers to: by the first differential frequency information generated according to the first reference frequency, is converted into the second differential frequency information that can generate based on the second reference frequency by the algorithm preset.
Such as: the first reference frequency is 2.43MHz, second reference frequency is 19.44MHz, transformational relation between the first differential frequency information so obtained according to 2.43MHz and the second differential frequency information obtained according to 19.44MHz can be: the binary numeral of the first differential frequency information is moved to left three and in original position zero padding, the first differential frequency information can be changed and transfer the second differential frequency information to.As: the first differential frequency information is 0001, and this 0001 is moved to left that can to obtain the second differential frequency information be 1000 in three trailing zeros.
Differential frequency information in CBR traffic packets message is revised as the second differential frequency information from original first differential frequency information by differential frequency modifier, and the CBR traffic packets message after this amendment differential frequency information is sent to egress equipment by packet message transmitter.
In one embodiment, differential frequency modifier according to the label in CBR traffic packets message, can determine the first reference frequency of the first differential frequency information generated in CBR traffic packets message.According to the egress equipment that CBR traffic packets message will arrive, obtain the second reference frequency that egress equipment is supported; Wherein this second reference frequency is for recovering the CBR business datum of corresponding second differential frequency information.Be the second differential frequency information corresponding to the second reference frequency by the first corresponding for the first reference frequency differential frequency convert information.Further, in differential frequency modifier, pre-set the transfer algorithm between the differential frequency information under one or more different reference frequency.In one or more transfer algorithm, inquiring about the corresponding first differential frequency convert information of the first reference frequency is the algorithm of the second differential frequency information corresponding to the second reference frequency, being the second differential frequency information by the first differential frequency convert information.In other words, the present invention is in differential frequency modifier, by the reference frequency information that the reference frequency convert information of source equipment is egress equipment, make the differential frequency information that source equipment produces, the differential frequency information being equivalent to obtain according to the reference frequency of egress equipment is converted in differential frequency modifier, so that egress equipment correctly can parse the differential frequency information of CBR business datum, recover CBR business datum accurately.
Step S230, sends to egress equipment by the CBR traffic packets message comprising the second differential frequency information, is processed by egress equipment.
CBR traffic packets message after amendment differential frequency information is sent to egress equipment by intercommunication modifier, and egress equipment recovers 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 according to the message encapsulation format of Packet Service, can extract the second differential frequency information of CBR business datum and CBR business datum.Specifically, according to the message encapsulation format of Packet Service, second differential frequency information of CBR business datum and CBR business datum is in CBR traffic packets message in corresponding field respectively, and packet message decapsulator can extract the second differential frequency information of CBR business datum and CBR business datum in corresponding field.Further, the amendment that the second differential frequency information of this CBR business datum is through intercommunication modifier obtains, and is the second differential frequency information that egress equipment can be used in correctly recovering CBR business datum from original first differential frequency convert information.
Differential frequency restorer according to the second differential frequency information extracted, can recover CBR business datum.Further, differential frequency restorer can go out CBR business data flow according to the differential frequency Information recovering extracted.
The CBR business data flow recovered can send by transmitter, such as, be sent to base station.
The present invention is by providing differential frequency information mutual communication modifier, and the equipment of different difference frequency correctly carries out traffic frequencies recovery to make two to support, the intercommunication problem that the difference frequency difference solving distinct device support causes.
Present invention also offers a kind of device adjusting differential clocks frequency.As shown in Figure 3, Fig. 3 is the flow chart of the device adjusting differential clocks frequency according to an embodiment of the invention.
This device is the intercommunication modifier in the embodiment of the present invention.
Receiver module 310, modular converter 320, sending module 330 can be comprised in the apparatus.
Receiver module 310, may be used for receiving cbr (constant bit rate) CBR traffic packets message; Wherein, the first differential frequency information corresponding with the first reference frequency that source equipment is supported is comprised at CBR traffic packets message; CBR traffic packets message is also included in the CBR business datum extracted in CBR business data flow.
Modular converter 320, may be used for the first differential frequency information in CBR traffic packets message to be converted to the second differential frequency information, wherein, and the second reference frequency that the corresponding egress equipment of the second differential frequency information is supported.
For generating the source equipment of CBR traffic packets message, also for: for each first reference frequency pre-sets a label; By the label of the first reference frequency, CBR business datum and the first differential frequency Information encapsulation thereof in CBR traffic packets message.
Modular converter 320, also for: according to the label in CBR traffic packets message, determine the first reference frequency that the first differential frequency information in CBR traffic packets message is corresponding; Obtain second reference frequency that egress equipment is supported; Wherein the second reference frequency is for recovering the CBR business datum of corresponding second differential frequency information; Be the second differential frequency information corresponding to the second reference frequency by the first corresponding for the first reference frequency differential frequency convert information.
Sending module 330, for the CBR traffic packets message comprising the second differential frequency information is sent to described egress equipment, is processed by described egress equipment, realizes the intercommunication of differential clocks frequency.
The function realized due to the device of the present embodiment is substantially corresponding to the embodiment of the method shown in earlier figures 1 to Fig. 2, therefore not detailed part in the description of the present embodiment, see the related description in previous embodiment, can not repeat at this.
The present invention is by providing differential frequency information mutual communication modifier, the differential frequency information of amendment CBR business datum, make two recoveries supporting can correctly carry out between the equipment of different reference frequency CBR business datum, achieve support different reference frequency equipment between the intercommunication of differential clocks frequency, improve the accuracy of date restoring.But be in fact not limited to above-mentioned execution mode; without departing from the spirit and scope of the present invention; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses, the change that can expect easily or replacement, all should drop within protection scope of the present invention.
Although be example object, disclose the preferred embodiments of the present invention, it is also possible for those skilled in the art will recognize various improvement, increase and replacement, and therefore, scope of the present invention should be not limited to above-described embodiment.
Claims (13)
1. adjust a method for differential clocks frequency, it is characterized in that, comprising:
Receive cbr (constant bit rate) CBR traffic packets message; Wherein, described CBR traffic packets message comprises the first differential frequency information corresponding with the first reference frequency that described source equipment is supported;
The first differential frequency information in described CBR traffic packets message is converted to the second differential frequency information, wherein, the second reference frequency that the corresponding egress equipment of described second differential frequency information is supported;
The CBR traffic packets message comprising the second differential frequency information is sent to described egress equipment, is processed by described egress equipment, realize the intercommunication of differential clocks frequency.
2. the method for claim 1, is characterized in that, the CBR business datum that described CBR traffic packets message comprises the label for each first reference frequency pre-sets and extracts from CBR business data flow.
3. method as claimed in claim 2, is characterized in that, the first differential frequency information in described CBR traffic packets message is converted to the second differential frequency information, also comprises:
According to described label, determine the first reference frequency that the first differential frequency information in described CBR traffic packets message is corresponding;
Obtain the second reference frequency that described egress equipment is supported; Wherein said second reference frequency is for recovering the CBR business datum of corresponding second differential frequency information;
Be the second differential frequency information corresponding to described second reference frequency by the first corresponding for described first reference frequency differential frequency convert information.
4. adjust a device for differential clocks frequency, it is characterized in that, comprising:
Receiver module, for receiving cbr (constant bit rate) CBR traffic packets message; Wherein, described CBR traffic packets message comprises the first differential frequency information corresponding with the first reference frequency that described source equipment is supported;
Modular converter, for the first differential frequency information in described CBR traffic packets message is converted to the second differential frequency information, wherein, the second reference frequency that the corresponding egress equipment of described second differential frequency information is supported;
Sending module, for the CBR traffic packets message comprising the second differential frequency information is sent to described egress equipment, is processed by described egress equipment, realizes the intercommunication of differential clocks frequency.
5. device as claimed in claim 4, is characterized in that, the CBR business datum that described CBR traffic packets message comprises the label for each first reference frequency pre-sets and extracts from CBR business data flow.
6. device as claimed in claim 5, is characterized in that, described modular converter, also for:
According to described label, determine the first reference frequency that the first differential frequency information in described CBR traffic packets message is corresponding;
Obtain second reference frequency that described egress equipment is supported; Wherein said second reference frequency is for recovering the CBR business datum of corresponding second differential frequency information;
Be the second differential frequency information corresponding to described second reference frequency by the first corresponding for described first reference frequency differential frequency convert information.
7. an intercommunication modifier, is characterized in that, comprising: packet message receiver, differential frequency modifier, packet message transmitter, wherein:
Packet message receiver, for receiving CBR traffic packets message; Wherein, described CBR traffic packets message comprises the first differential frequency information corresponding with the first reference frequency that described source equipment is supported;
Differential frequency modifier, for the first differential frequency information in described CBR traffic packets message is converted to the second differential frequency information, wherein, the second reference frequency that the corresponding egress equipment of described second differential frequency information is supported;
Packet message transmitter, for the CBR traffic packets message comprising the second differential frequency information is sent to described egress equipment, is processed by described egress equipment, realizes the intercommunication of differential clocks frequency.
8. intercommunication modifier as claimed in claim 7, is characterized in that, the CBR business datum that described CBR traffic packets message comprises the label for each first reference frequency pre-sets and extracts from CBR business data flow.
9. intercommunication modifier as claimed in claim 8, is characterized in that, described differential frequency modifier, also for:
According to described label, determine the first reference frequency that the first differential frequency information in described CBR traffic packets message is corresponding;
Obtain second reference frequency that described egress equipment is supported; Wherein said second reference frequency is for recovering the CBR business datum of corresponding second differential frequency information;
Be the second differential frequency information corresponding to described second reference frequency by the first corresponding for described first reference frequency differential frequency convert information.
10. a source equipment, is characterized in that, comprising:
Access device, for extracting CBR business datum from CBR business data flow;
Differential frequency information generator, for according to the first reference frequency, generates the first differential frequency information of described CBR business datum;
Packet message wrapper, for being CBR traffic packets message by described CBR business datum and the first differential frequency Information encapsulation thereof.
11. source equipment as claimed in claim 10, is characterized in that, described differential frequency generator specifically for:
Continuous accumulation counting is carried out, to obtain one or more count value according to the first reference frequency;
Using the first differential frequency information of count value corresponding during the described CBR business datum of extraction as described CBR business datum.
12. source equipment as described in claim 10 or 11, is characterized in that, described packet message wrapper, also for:
For each first reference frequency pre-sets a label;
By the label of described first reference frequency, CBR business datum and the first differential frequency Information encapsulation thereof in CBR traffic packets message.
13. 1 kinds of systems adjusting differential clocks frequency, is characterized in that, comprising: device, the egress equipment of source equipment, adjustment differential clocks frequency; Wherein:
Source equipment, for generating cbr (constant bit rate) CBR traffic packets message; Wherein, the first differential frequency information corresponding with the first reference frequency that described source equipment is supported is comprised at described CBR traffic packets message;
The device of adjustment differential clocks frequency, for the first differential frequency information in described CBR traffic packets message is converted to the second differential frequency information, wherein, the second reference frequency that the corresponding egress equipment of described second differential frequency information is supported;
Egress equipment, for recovering the CBR business datum in CBR traffic packets message based on the second reference frequency, realizes the intercommunication of differential clocks frequency.
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 |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410020599.5A CN104796211B (en) | 2014-01-16 | 2014-01-16 | Adjust differential clocks frequency approach, device, system and intercommunication modifier |
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| CN104796211B CN104796211B (en) | 2019-01-08 |
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| GB0205350D0 (en) * | 2002-03-07 | 2002-04-24 | Zarlink Semiconductor Inc | Clock synchronisation over a packet network using SRTS without a common network clock |
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| WO2015106504A1 (en) | 2015-07-23 |
| CN104796211B (en) | 2019-01-08 |
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