CN103051493A - Service clock determination method and device and packet transport network equipment - Google Patents
Service clock determination method and device and packet transport network equipment Download PDFInfo
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- CN103051493A CN103051493A CN2012105390349A CN201210539034A CN103051493A CN 103051493 A CN103051493 A CN 103051493A CN 2012105390349 A CN2012105390349 A CN 2012105390349A CN 201210539034 A CN201210539034 A CN 201210539034A CN 103051493 A CN103051493 A CN 103051493A
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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
- H04J3/062—Synchronisation of signals having the same nominal but fluctuating bit rates, e.g. using buffers
- H04J3/0632—Synchronisation of packets and cells, e.g. transmission of voice via a packet network, circuit emulation service [CES]
Abstract
The invention provides a service clock determination method and a service clock determination device and packet transport network equipment of PWE3 (Pseudo-Wire Emulation Edge to Edge), which are used for solving the problem that influence is caused to a service clock from jitter of an adaptive clock in PWE3 communication. The service clock determination method comprises the following steps of: detecting whether an adaptive clock used as a service clock of the PWE3 jitters; and if so, taking a local clock as the service clock of the PWE3. Through implementation of the invention, when the adaptive clock of the PWE3 jitters, the local clock is used as the service clock of a receiving side, so that the influence of the jitter of the adaptive clock on the service clock is avoided, and therefore the communication stability of a communication system applying a PWE3 protocol is ensured.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of pseudo wire emulation agreement of PWE3(edge-to-edge) business clock determine method, device and PTN(Packet Transport Network) equipment.
Background technology
Along with communication network technology and professional development, communication service IPization is inexorable trend, at present in mainstream carrier's the communication carrier net, PTN equipment is progressively replaced original MSTP equipment, be used for realizing the IPization of communication service, in order to carry the communication services such as former 2G network, landline telephone or individual line subscriber, the PWE3 standard is arisen at the historic moment; In the PWE3 business, be delivered to receiving terminal in order the business clock of transmitting terminal to be penetrated IP network, IP network is congested to cause professional shake with bursts of traffic in order to reduce simultaneously, adopted the Adaptive Clock Method realization, self-adaptation clock is that the number by the PWE3 packet data package that detects the receiving terminal buffer memory automatically carries out clock and adjusts, and then can partly recover business clock, and prevent the PSN(packet switching network) the inhomogeneous business datum packet loss that causes of forwarding.
But because after the communication service PWE3ization, during the IP network of packet data package process centre, its transmission is often inhomogeneous, and emergency case is very serious, cause self-adaptation clock to be shaken, and then cause the business clock of receiving terminal unstable, even cause service delivery unusual.
Summary of the invention
The unsettled problem of business clock that shake causes receiving terminal occurs in self-adaptation clock in the current communication system in order to solve, and the business clock that the invention provides a kind of PWE3 is determined method, device and PTN equipment.
The business clock that the invention provides a kind of PWE3 is determined method, and in one embodiment, the method comprises: whether detection shakes as the self-adaptation clock of the business clock of PWE3; If shake, then with the business clock of local clock as PWE3.
Further, the business clock in above-described embodiment determines that method also comprises: whether the self-adaptation clock that detects PWE3 has stopped shake; If stopped shake, then again with the self-adaptation clock of the PWE3 business clock as PWE3.
Further, above-described embodiment business clock determines that the method whether detection in the method shakes as the self-adaptation clock of the business clock of PWE3 is: detect within the unit interval, whether the peak value number of the self-adaptation clock of PWE3 shakes; If the peak value number is shaken, then the self-adaptation clock of PWE3 is shaken.
Simultaneously, the present invention also provides the business clock of a kind of PWE3 to determine device, and in one embodiment, this device comprises first detection module and determination module; Whether first detection module is shaken for detection of the self-adaptation clock as the business clock of PWE3, and the testing result of determination module first detection module is when shake occurs, then with the determination module of local clock as the business clock of PWE3.
Further, whether the first detection module in above-described embodiment has also stopped shake for the self-adaptation clock of PWE3; The testing result that determination module also is used for first detection module is when having stopped shake, again with the self-adaptation clock of the PWE3 business clock as PWE3
Simultaneously, the present invention also provides a kind of PTN equipment, and in one embodiment, this PTN equipment comprises: the second detection module and handover module; Whether the second detection module is shaken for detection of the self-adaptation clock as the business clock of PWE3; The testing result that handover module is used for the second detection module is when shake occurs, then with the business clock of local clock as PWE3.
Further, whether the second detection module in above-described embodiment has also stopped shake for detection of the self-adaptation clock of PWE3; The testing result that handover module also is used for the second detection module is when having stopped shake, again with the self-adaptation clock of the PWE3 business clock as PWE3.
Further, the second detection module in above-described embodiment is clock phase-locked loop; Clock phase-locked loop for detection of described local clock within the unit interval, whether the peak value number of the self-adaptation clock of described PWE3 shakes; If the peak value number is shaken, the self-adaptation clock that then is judged as PWE3 is shaken.
By enforcement of the present invention, when shake occurs in the self-adaptation clock of PWE3, with the business clock of local clock as receiving terminal, avoided self-adaptation clock shake to occur on the impact of business clock, further, when adaptive clock recovery is normal, with self-adaptation clock as business clock, when avoiding the self-adaptation clock shortcoming, also utilized the advantage of self-adaptation clock, guaranteed to use the communication stability of the communication system of PWE3 agreement.
Description of drawings
The business clock that Fig. 1 provides for one embodiment of the invention is determined the schematic diagram of device;
Fig. 2 is the schematic diagram of first detection module among Fig. 1;
The schematic diagram of the PTN equipment that Fig. 3 provides for one embodiment of the invention;
The business clock that Fig. 4 provides for one embodiment of the invention is determined the schematic diagram of method;
The business clock that Fig. 5 provides for one embodiment of the invention is determined the schematic diagram of method;
The schematic diagram of the communication system that Fig. 6 provides for one embodiment of the invention.
Embodiment
Below by embodiment mode by reference to the accompanying drawings the present invention is made further annotation explanation.
The invention provides and a kind ofly communicate by letter for PWE3, the business clock of receiving terminal is determined technology, solved and only relied on self-adaptation clock dynamically to adjust existing problem in the prior art, by between local clock and self-adaptation clock, switching, guaranteed greatly the stability of communication system operation.
The business clock that Fig. 1 provides for one embodiment of the invention is determined the schematic diagram of device; As shown in Figure 1, in this embodiment, the business clock of PWE3 provided by the invention determines that device comprises first detection module 11 and determination module 12; Wherein,
If it is that the self-adaptation clock of the business clock of PWE3 is when shake occurs, with the business clock of local clock as PWE3 that determination module 12 is used for the testing result of first detection module 11.
Further, whether the first detection module in above-described embodiment 11 has also stopped shake for detection of the self-adaptation clock of the PWE3 that sends shake; If it is the self-adaptation clock of PWE3 when having stopped shake that determination module 12 also is used for the testing result of first detection module 11, then again with the self-adaptation clock of the PWE3 business clock as PWE3.
Further, first detection module 11 is that whether detection shakes as the self-adaptation clock of the business clock of PWE3 according to local clock.
Further, the local clock in above-described embodiment refers in the communication system that PTN equipment carries out business employed benchmark service clock when transmitting.If but PTN equipment utilizes local clock to carry out the business transmission as business clock, also can have error because of the business clock of professional receiving terminal and professional transmitting terminal and cause loading error occurring always.
Fig. 2 is the schematic diagram of first detection module 11 among Fig. 1; As can be seen from Figure 2, in one embodiment, first detection module 11 comprises detection sub-module 111 and judgement submodule 112, wherein,
Detection sub-module 111 is for detection of in the N continuous (N＞=5) of local clock in the individual unit interval, and whether the peak value number of the self-adaptation clock of PWE3 shakes; As in continuous 5 unit interval t, the peak value number of self-adaptation clock keeps (± 5%) about 1000 always, judges that then self-adaptation clock do not shake; If the variation of peak value number as " 700,1000,1200,800,600 " judges that then self-adaptation clock shakes;
Judge that submodule 112 is used for when the testing result of detection sub-module 111 is described peak value number generation shake, the self-adaptation clock that is judged as the PWE3 of this moment is shaken.
The schematic diagram of the PTN equipment that Fig. 3 provides for one embodiment of the invention; As can be seen from Figure 3, in one embodiment, adopt business clock provided by the invention to determine that technology determines that the PTN equipment of its business clock comprises the second detection module 31 and handover module 32; Wherein,
Whether the second detection module 31 is shaken for detection of the self-adaptation clock as the business clock of PWE3, and testing result is sent to handover module 32;
If being the self-adaptation clock of the business clock of PWE3, the testing result that handover module 32 is used for the second detection module 31 shakes, then with the business clock of local clock as PWE3.
Further, whether the second detection module 31 in above-described embodiment has also stopped shake for detection of the self-adaptation clock that detects the PWE3 that sends shake; If it is that the self-adaptation clock of PWE3 has stopped shake that handover module 32 also is used for the testing result of the second detection module 31, then again with the self-adaptation clock of the PWE3 business clock as PWE3.
Further, whether the second detection module 31 in above-described embodiment is used for detecting as the self-adaptation clock of the business clock of PWE3 according to local clock and shakes.
Predictably, in the situation of not conflicting mutually, each functional module among above-mentioned all embodiment can make up and replace mutually, and its new solution that mutually makes up and replace rear formation also all is implementation of the present invention.
In order to realize the effect of the second detection module 31 in above-described embodiment, in one embodiment, the second detection module 31 is phase-locked loop circuit/modules, and is concrete, can be a clock phase-locked loop; Its specific works principle is as follows: clock phase-locked loop is for detection of within the unit interval of local clock, and whether the peak value number of the self-adaptation clock of PWE3 shakes; If the peak value number is shaken, the self-adaptation clock that then is judged as PWE3 is shaken; As in continuous unit interval t, the peak value number of self-adaptation clock keeps (± 5%) about 1000 always, judge that then self-adaptation clock do not shake, if the peak value number as " 700,1000,1200,800 ... " such variation, judge that then self-adaptation clock shakes.
Further, the input of the clock phase-locked loop in above-described embodiment is the self-adaptation clock of PWE3, and the monitor source of clock phase-locked loop is local clock.
Further, the handover module in above-described embodiment 32 can be realized module and the circuit of handoff functionality for diverter switch etc.
Simultaneously, the present invention also provides the business clock of a kind of PWE3 to determine method; The business clock that Fig. 4 provides for one embodiment of the invention is determined the schematic diagram of method, and as shown in Figure 4, in this embodiment, business clock provided by the invention determines that method comprises:
Step S401: whether detection shakes as the self-adaptation clock of the business clock of PWE3; If shake, then enter step S402; If do not shake, then continue to detect;
Step S402: then with the business clock of local clock as PWE3.
The business clock that Fig. 5 provides for one embodiment of the invention is determined the schematic diagram of method; As shown in Figure 5, the business clock in above-described embodiment determines that method can also further comprise:
Step S501: whether the self-adaptation clock that detects PWE3 has stopped shake; If stop shake, execution in step S502 then; If do not stop shake, then continue to detect;
Step S502: again with the self-adaptation clock of the PWE3 business clock as PWE3, and execution in step S401.
The business clock that provides in above-described embodiment determines the method whether detection in the method shakes as the self-adaptation clock of the business clock of PWE3 is that whether detection shakes as the self-adaptation clock of the business clock of PWE3 according to local clock; Further, this monitoring method may further comprise the steps:
In the unit interval, whether the peak value number of the self-adaptation clock of PWE3 shakes in the N continuous of local clock in detection; As in continuous unit interval t, the peak value number of self-adaptation clock keeps (± 5%) about 1000 always, judges that then self-adaptation clock do not shake; If the peak value number as " 700,1000,1200,800 ... 200 " such variation, judge that then self-adaptation clock shakes;
If the peak value number is shaken, then the self-adaptation clock of PWE3 is shaken.
For business clock provided by the invention being determined method applies in the real life, the present invention also provides the service implementation method of a kind of communication system and a kind of PWE3, specifies below in conjunction with Fig. 6.
The schematic diagram of the communication system that Fig. 6 provides for one embodiment of the invention; As can be seen from Figure 6, in this embodiment, communication system provided by the invention comprises at least two PTN equipment (PTN equipment 61 and PTN equipment 62), in these PTN equipment at least one determines that with business clock provided by the invention technology determines its business clock, carries out the forwarding of message according to the business clock of determining.For ease of hereinafter explanation, set this communication system and comprise two PTN equipment, that is, and PTN equipment 61 and PTN equipment 62, and PTN equipment 62 adopts business clock provided by the invention to determine that technology determines its business clock.
Simultaneously the present invention also provides the implementation method of the business of a kind of PWE3, and this implementation method comprises business clock determining step and professional forwarding step, wherein:
The business clock determining step comprises: whether detection shakes as the self-adaptation clock of the business clock of PWE3; If shake, then with the business clock of local clock as PWE3;
Professional forwarding step comprises: receive and resolve business data packet for corresponding professional, and corresponding professional according to the business clock transmission of determining.
Business clock determining step in above-described embodiment can also determine that method finishes by the business clock that other embodiments of the invention provide.
The implementation of implementation method of the business of a kind of PWE3 provided by the invention now is described in conjunction with Fig. 6; In this embodiment, pass through the IP network service data transmission between PTN equipment 1 and the PTN equipment 2, PTN equipment 1 with front equipment, PTN equipment 2 with at rear equipment by PDH(plesiochronous digital system) and/or the SDH(synchronous digital hierarchy) carry out transfer of data, at this moment, the implementation method of the business of this PWE3 may further comprise the steps:
Whether PTN equipment 62 shake occurs and/or stops to shake definite business clock according to the business clock of PWE3;
By enforcement of the present invention, when self-adaptation clock was not shaken, as business clock, the advantage of utilizing self-adaptation clock automatically to recover was carried out the business transmission with self-adaptation clock; When shake occurs in self-adaptation clock, as business clock, utilize the high-precision advantage of local clock to carry out the business transmission local clock, avoided the impact of self-adaptation clock shake on business clock; Further, when detecting adaptive clock recovery when normal, again with self-adaptation clock as business clock, in order to farthest utilize the advantage of self-adaptation clock and avoid the shortcoming of self-adaptation clock, guaranteed stability and the accuracy of professional transmission in the communication system.
It below only is the specific embodiment of the present invention; be not that the present invention is done any pro forma restriction; any simple modification, equivalent variations or modification that every foundation technical spirit of the present invention is done above execution mode all still belong to the protection range of technical solution of the present invention.
Claims (10)
1. the business clock of the pseudo wire emulation agreement of an edge-to-edge is determined method, it is characterized in that, comprising:
Whether detection shakes as the self-adaptation clock of the business clock of the pseudo wire emulation agreement of edge-to-edge;
If shake, then with the business clock of local clock as the pseudo wire emulation agreement of edge-to-edge.
2. the business clock of the pseudo wire emulation agreement of edge-to-edge as claimed in claim 1 is determined method, it is characterized in that, also comprises: whether Edge detected has stopped shake to the self-adaptation clock of the pseudo wire emulation agreement at edge; If stopped shake, then again with the self-adaptation clock of the pseudo wire emulation agreement of the edge-to-edge business clock as the pseudo wire emulation agreement of edge-to-edge.
3. the business clock of the pseudo wire emulation agreement of described edge-to-edge is determined method as claimed in claim 1 or 2, it is characterized in that the method whether described detection shakes as the self-adaptation clock of the business clock of the pseudo wire emulation agreement of edge-to-edge is:
Detection is within the unit interval of described local clock, and whether the peak value number of the self-adaptation clock of the pseudo wire emulation agreement of described edge-to-edge shakes;
If described peak value number is shaken, the self-adaptation clock that then is judged as the pseudo wire emulation agreement of described edge-to-edge is shaken.
4. the business clock of the pseudo wire emulation agreement of an edge-to-edge is determined device, it is characterized in that, comprises first detection module and determination module, wherein:
Whether first detection module is shaken for detection of the self-adaptation clock as the business clock of the pseudo wire emulation agreement of edge-to-edge;
The testing result that determination module is used for first detection module is when shake occurs, with the business clock of local clock as the pseudo wire emulation agreement of edge-to-edge.
5. the business clock of the pseudo wire emulation agreement of edge-to-edge as claimed in claim 4 is determined device, it is characterized in that, whether described first detection module has also stopped shake for detection of the self-adaptation clock of the pseudo wire emulation agreement of edge-to-edge; The testing result that described determination module also is used for described first detection module is when having stopped shake, again with the self-adaptation clock of the pseudo wire emulation agreement of the edge-to-edge business clock as the pseudo wire emulation agreement of edge-to-edge.
6. determine device such as the business clock of the pseudo wire emulation agreement of claim 4 or 5 described edge-to-edges, it is characterized in that described first detection module comprises detection sub-module and judges submodule:
Detection sub-module is for detection of within the unit interval of described local clock, and whether the peak value number of the self-adaptation clock of the pseudo wire emulation agreement of described edge-to-edge shakes;
Judge that submodule is used for when the testing result of detection sub-module is described peak value number generation shake, the self-adaptation clock that is judged as the pseudo wire emulation agreement of described edge-to-edge is shaken.
7. a Packet Transport Network equipment is characterized in that, comprises the second detection module and handover module;
Whether the second detection module is shaken for detection of the self-adaptation clock as the business clock of the pseudo wire emulation agreement of edge-to-edge;
The testing result that handover module is used for the second detection module switches to local clock with the business clock of the pseudo wire emulation agreement of edge-to-edge when shake occurs.
8. Packet Transport Network equipment as claimed in claim 7 is characterized in that, whether described the second detection module has also stopped shake for detection of the self-adaptation clock of the pseudo wire emulation agreement of edge-to-edge; The testing result that described handover module also is used for described the second detection module is when having stopped shake, again with the self-adaptation clock of the pseudo wire emulation agreement of the edge-to-edge business clock as the pseudo wire emulation agreement of edge-to-edge.
9. such as claim 7 or 8 described Packet Transport Network equipment, it is characterized in that described the second detection module is clock phase-locked loop; Described clock phase-locked loop is for detection of within the unit interval of described local clock, and whether the peak value number of the self-adaptation clock of the pseudo wire emulation agreement of described edge-to-edge shakes; If described peak value number is shaken, the self-adaptation clock that then is judged as the pseudo wire emulation agreement of described edge-to-edge is shaken.
10. Packet Transport Network equipment as claimed in claim 9 is characterized in that, the self-adaptation clock of the business clock of the pseudo wire emulation agreement of the input input edge-to-edge of described clock phase-locked loop, and the monitoring client of described clock phase-locked loop is inputted described local clock.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN2012105390349A CN103051493A (en) | 2012-12-13 | 2012-12-13 | Service clock determination method and device and packet transport network equipment |
| PCT/CN2013/089440 WO2014090196A1 (en) | 2012-12-13 | 2013-12-13 | Service clock determining method and apparatus and packet transport network device |
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| CN2012105390349A CN103051493A (en) | 2012-12-13 | 2012-12-13 | Service clock determination method and device and packet transport network equipment |
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| WO (1) | WO2014090196A1 (en) |
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| WO2014090196A1 (en) * | 2012-12-13 | 2014-06-19 | 中兴通讯股份有限公司 | Service clock determining method and apparatus and packet transport network device |
| WO2015117387A1 (en) * | 2014-07-23 | 2015-08-13 | 中兴通讯股份有限公司 | Method and device for switching multi-link master clock, and ptn device |
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| CN1866803A (en) * | 2005-09-13 | 2006-11-22 | 华为技术有限公司 | Ethernet apparatus and method for solving clock synchronization in total Ethernet |
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| WO2015117387A1 (en) * | 2014-07-23 | 2015-08-13 | 中兴通讯股份有限公司 | Method and device for switching multi-link master clock, and ptn device |
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| WO2014090196A1 (en) | 2014-06-19 |
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Application publication date: 20130417 |