CN101500183B - Method for synchronizing frame head by transmission equipment and apparatus thereof - Google Patents
Method for synchronizing frame head by transmission equipment and apparatus thereof Download PDFInfo
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- CN101500183B CN101500183B CN 200910105861 CN200910105861A CN101500183B CN 101500183 B CN101500183 B CN 101500183B CN 200910105861 CN200910105861 CN 200910105861 CN 200910105861 A CN200910105861 A CN 200910105861A CN 101500183 B CN101500183 B CN 101500183B
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Abstract
The invention relates to the field of optical communication, providing a method for the synchronization of a frame head by transmission equipment and a device thereof. The method comprises the following steps: A. the type and selecting status of a cross unit are obtained by a business unit; B. the selecting status change of the cross unit is detected; C. according to the type of current mainly used cross unit, a corresponding synchronization value of a business frame head is written into a chip of the business unit, and as the business frame head synchronization value is taken as a center, frame heads are searched by the chip in the position range of frame heads; and D. according to business frame head mark, the business frame heads are positioned by the chip in the business unit. The invention solves the problem of business interruption cause by that when the business frame head of the cross unit is changed, new frame heads can not be synchronized by the business unit.
Description
Technical field
The present invention relates to the optical communication field, particularly a kind of method of synchronizing frame head by transmission equipment and device thereof.
Background technology
Along with SDH (Synchronous Digital Hierarchy synchronous digital hierarchy) technology constantly develops, in order to guarantee professional stability, transmission equipment adopts the 1+1 backup technology usually.As shown in Figure 1, the 1+1 backup technology is exactly to dispose two cross units on the equipment, and two cross unit running statuses are just the same, and one is that the master uses cross unit, and one is subsequent use cross unit, is connected with business unit N with business unit 1 respectively.If a cross unit has been broken, then business unit is chosen an other cross unit, under bad one situation, still can guarantee professional stability like this, realizes the concurrent excellent receipts of signal.For example business unit carries out bus selection according to the quality of signal, and when a cross unit broke down, veneer can be chosen subsequent use normal another cross unit, thereby improves the professional reliability of transmission equipment.
But; Owing to there is the difference on the hardware designs, the professional frame head scope of dissimilar cross units is inconsistent, and cross unit is carrying out signal when mutual with business unit; Transmit with the SDH frame structure; Each frame has a frame head, indicates the initial of this frame, and above-mentioned professional frame head scope is exactly the position range that cross unit is put into frame head bus.And because the chip hardware restriction, some business unit can not be realized FR frame head search, like this; Use at dissimilar cross unit mixed insertions; When main-apparatus protection concerns each other, after the business unit bus selection, the professional frame head that business unit can not be synchronized to cross unit in real time can appear; Thereby long-time the interruption appears in the business that causes business unit, makes that professional reliability is difficult to ensure.
In addition, because professional expansion, current existing transmission equipment often need carry out dilatation to be handled.If when initial networking is planned, do not consider professional from now on growth, adopted the less cross unit of cross-capacity, when existing device can not satisfy the demands, just need be with the equipment dilatation to the bigger cross unit of cross-capacity.Just need upgrade cross unit this moment, also might occur the professional frame head that business unit can not be synchronized to new cross unit in real time after the upgrading, gives at network service and bring the interruption influence.
Summary of the invention
The purpose of the embodiment of the invention is to provide a kind of method and device thereof of synchronizing frame head by transmission equipment, to solve that when the changing of traffic frame hair of cross unit business unit can't be synchronized to new professional frame head and the problem of the service disconnection that causes.
The technical scheme that the embodiment of the invention adopts is following:
A kind of method of synchronizing frame head by transmission equipment may further comprise the steps:
A, business unit obtain the type and the selection mode of cross unit;
B, the selection mode that detects said cross unit change;
C, write corresponding business frame head synchronization value according to current main type with cross unit to the chip of business unit, said chip is that frame head is searched in the center in the frame head orientation range with said professional frame head synchronization value;
D, said chip are identified at according to the traffic frame head and navigate to professional frame head in the business unit.
Further, said step C comprises:
C1, confirm professional frame head scope according to the type of cross unit;
C2, in said professional frame head scope, search the optimum position value, as professional frame head synchronization value, said optimum position value is provided with according to user's request.
Wherein, said optimum position value is the median in the professional frame head scope.
Wherein, said frame head orientation range is according to the type setting of cross unit.
Further, said step B comprises:
B1, business unit are according to the ready situation of current all cross units, and the cross unit that ready situation is optimum is as the main cross unit of using;
B2, the master who preserves with cross unit and history according to current selected master judge with cross unit whether the selection mode of current cross unit changes.
Wherein, the ready situation of said cross unit comprises: the situation of situation on the throne, service bus and overhead bus and relevant alarm.
The embodiment of the invention also provides a kind of device of synchronizing frame head by transmission equipment, and this transmission equipment comprises cross unit and business unit, and said device comprises:
Cross unit information acquisition module, the relevant information that is used to obtain and preserve cross unit comprises the type and the selection mode of cross unit;
Selection mode changes judge module, is connected with cross unit information acquisition module, be used to detect said cross unit selection mode variation and to search locating module transmission detection signal;
The search locating module is used for when receiving the detection signal of selection mode variation judge module transmission search and positioning service frame head.
Said search locating module also comprises:
Search module is used for writing corresponding business frame head synchronization value according to current main type with cross unit to the chip of business unit, and said chip is that frame head is searched in the center in the frame head orientation range with this synchronization value;
Locating module is used for being identified at business unit according to the traffic frame head and navigates to professional frame head.
Further comprise in the said search module:
Frame head scope determination module is used for confirming professional frame head scope according to current master with the type of cross unit;
Professional frame head synchronization value determination module is used in determined professional frame head scope, searching the optimum position value as professional frame head synchronization value, and said optimum position value is provided with according to user's request.
Further comprise in the search module:
The frame head orientation range is provided with module, is used for according to current main type with cross unit said frame head orientation range being set.
The method and the device thereof of the synchronizing frame head by transmission equipment that the employing embodiment of the invention provides; In the time of can preventing that the business unit bus from switching since selected cross unit change; The problem of the service disconnection that causes business unit can't be synchronized to the professional frame head of new cross unit and cause has improved professional stability and the reliability of transmission equipment; This method can also prevent that the business unit that occurs after the cross unit upgrading can not be synchronized to the professional frame head of new cross unit in real time and the interruption influence that brings realizes smooth upgrade in addition.
Description of drawings
Fig. 1 is the sketch map that is connected of cross unit and business unit in the embodiment of the invention transmission equipment;
Fig. 2 is the method flow diagram of the synchronizing frame head by transmission equipment that provides of the embodiment of the invention one;
Fig. 3 is the method flow diagram of the synchronizing frame head by transmission equipment that provides of the embodiment of the invention two;
Fig. 4 is the structure drawing of device of the synchronizing frame head by transmission equipment that provides of the embodiment of the invention three.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is done further detailed description.
Fig. 2 is the method flow diagram of the synchronizing frame head by transmission equipment that provides of the embodiment of the invention one.This method adopts the main-apparatus protection configuration based on transmission equipment, and for the operate as normal of transmission equipment, business unit need be selected the normal cross unit of current operation, promptly carries out bus selection, and the step of concrete synchronizing frame head comprises:
S110, business unit obtain the type and the selection mode of cross unit;
Business unit is synchronous in order to realize frame head, need obtain the type information and the selection mode information of cross unit, confirms when the type of cross unit is hardware designs; The selection mode of cross unit is that which cross unit what to be used to judge the current selection master of business unit usefulness be, is divided into mainly with state and stand-by state, is used state by being of choosing of business unit is main, and not having selected is stand-by state;
S120, the selection mode that detects said cross unit changes;
Business unit is judged the main whether identical with cross unit with the master of selection before with cross unit of current selection, if identical then process ends, if difference would then forward step S 130 to;
S130 writes corresponding business frame head synchronization value according to current main type with cross unit to the chip of business unit, and said chip is that frame head is searched in the center in the frame head orientation range with this synchronization value;
At first obtain professional frame head scope with the type of cross unit according to an instance of the present invention according to current master; Said professional frame head scope is determined by the type of cross unit; The corresponding different service frame head of the type of different cross units scope, master for example shown in Figure 1 uses cross unit to be the X type, and its frame head centre position is x; Then its corresponding frame head scope is that said centre position left-right deviation about 0 arrives about n byte, and then the professional frame head scope of X type cross unit is that x-n is to x+n; In said professional frame head scope, search the optimum position value then; This optimum position is worth as professional frame head synchronization value; Said optimum position value is provided with according to user's request; Generally the optimum position value is arranged to the median in the professional frame head scope, can certainly be arranged to median, and the optimum position value be set as professional frame head synchronization value according to other demands of user according to user's practical experience; Said chip can be the backplane interface chip, and it is responsible for handling the service interaction between cross unit and the business unit, and the chip of this type all has the frame head function of search, and difference is that the frame head hunting zone is different; Said frame head orientation range makes it to comprise the professional frame head scope of cross unit according to current main type setting with cross unit.
S140, said chip are identified at according to the traffic frame head and navigate to professional frame head in the business unit;
Said traffic frame leader knowledge is to be used for a sign of mark frame head, and in an example, the knowledge of traffic frame leader is meant the A1/A2 in the SDH frame.
When thus it is clear that the method for the synchronizing frame head that present embodiment provides can prevent that the business unit bus from switching since selected cross unit change; The problem of the service disconnection that causes business unit can't be synchronized to the professional frame head of new cross unit and cause has improved professional stability and the reliability of transmission equipment.
Fig. 3 is the method flow diagram of the cross unit of the transmission equipment that provides of the embodiment of the invention two business unit synchronous service frame head when carrying out upgrading service, and this method comprises the steps:
S210 preserves current selected cross unit type;
S220; Business unit is judged the ready situation of the cross unit after current two upgradings; The situation such as situation and relevant alarm that comprises situation on the throne, service bus and overhead bus; Situation on the throne is meant whether cross unit is inserted on the equipment, and the situation of service bus and overhead bus is meant whether ready information of service bus that cross unit is seen off and overhead bus, and relevant alarm is meant the warning information on the service bus; Various ready situation are different to the influence of bus selection; The good cross board of for example ready situation is preferentially by bus selection, and the back is by bus selection for the cross board of ready situation difference, and the cross unit that ready situation is optimum is as the main cross unit of using;
S230 according to current main type and historical main type with cross unit of preserving with cross unit, judges whether the cross unit type of current selected main usefulness changes, and does not change if, then process ends; If the cross unit type of current selected main usefulness changes then forwards step S240 to;
S240 according to the current main cross unit type of using, writes with said current main with the corresponding professional frame head synchronization value of cross unit type toward chip register;
Definite method of said professional frame head synchronization value is following: at first confirm professional frame head scope according to current master with the type of cross unit; Said professional frame head scope is determined by the type of cross unit, the corresponding different service frame head of the type of different cross units scope; In said professional frame head scope, search the optimum position value then, as professional frame head synchronization value, said optimum position value is arranged to the median in the professional frame head scope according to user's request;
S250; Write the synchronous controlling value of startup frame head to the chip controls register, start the frame head Synchronous Processing, and time-delay is waited for a period of time; Said frame head Synchronous Processing is that said chip is that frame head is searched in the center in the frame head orientation range with said professional frame head synchronization value; Correctly find frame head up to chip, said frame head orientation range makes it to comprise the professional frame head scope of cross unit according to current main type setting with cross unit;
S260, when said chip be identified at according to the traffic frame head navigate to professional frame head in the business unit after, write the synchronous controlling value of end frame head to the chip controls register, finish this frame head synchronizing process.
The interruption influence that brings realizes smooth upgrade it is thus clear that present embodiment can prevent that the business unit that occurs after the cross unit upgrading can not be synchronized to the professional frame head of new cross unit in real time.
Fig. 4 is the structure drawing of device of the synchronizing frame head by transmission equipment that provides of the embodiment of the invention three.Annexation among the embodiment of the invention figure between each equipment is for the needs of clear its information interaction of explaination and control procedure, therefore should be regarded as annexation in logic, and should not only limit to physical connection.This device comprises:
Cross unit information acquisition module, the relevant information that is used to obtain and preserve cross unit comprises the type and the selection mode of cross unit;
Selection mode changes judge module, is connected with cross unit information acquisition module, be used to detect said cross unit selection mode variation and to search locating module transmission detection signal;
The search locating module is used for when receiving the detection signal of selection mode variation judge module transmission search and positioning service frame head.
Said search locating module also comprises:
Search module is used for writing corresponding business frame head synchronization value according to current main type with cross unit to the chip of business unit, and said chip is that frame head is searched in the center in the frame head orientation range with this synchronization value;
Locating module is used for being identified at business unit according to the traffic frame head and navigates to professional frame head.
Further comprise in the said search module:
Frame head scope determination module is used for confirming professional frame head scope according to current master with the type of cross unit;
Professional frame head synchronization value determination module is used in determined professional frame head scope, searching the optimum position value as professional frame head synchronization value.
Further comprise in the search module:
The frame head orientation range is provided with module, is used for according to the type of current cross unit said frame head orientation range being set.
Wherein, said optimum position value is the median in the professional frame head scope.
Claims (10)
1. the method for a synchronizing frame head by transmission equipment is characterized in that, may further comprise the steps:
A, business unit obtain the type and the selection mode of cross unit;
B, the selection mode that detects said cross unit change;
C, write corresponding business frame head synchronization value according to current main type with cross unit to the chip of business unit, said chip is that frame head is searched in the center in the frame head orientation range with said professional frame head synchronization value;
D, said chip are identified at according to the traffic frame head and navigate to professional frame head in the business unit.
2. the method for synchronizing frame head by transmission equipment according to claim 1 is characterized in that, said step C comprises:
C1, confirm professional frame head scope according to the type of cross unit;
C2, in said professional frame head scope, search the optimum position value, as professional frame head synchronization value, said optimum position value is provided with according to user's request.
3. the method for synchronizing frame head by transmission equipment according to claim 2 is characterized in that, said optimum position value is the median in the frame head locking range.
4. the method for synchronizing frame head by transmission equipment according to claim 1 is characterized in that, said frame head orientation range is according to the type setting of cross unit.
5. according to the method for the described synchronizing frame head by transmission equipment of aforementioned arbitrary claim, it is characterized in that step B comprises:
B1, business unit are according to the ready situation of current all cross units, and the cross unit that ready situation is optimum is as the main cross unit of using;
B2, the master who preserves with cross unit and history according to current selected master judge with cross unit whether the selection mode of current cross unit changes.
6. the method for synchronizing frame head by transmission equipment according to claim 5 is characterized in that, the ready situation of said cross unit comprises:
The situation of situation on the throne, service bus and overhead bus and relevant alarm.
7. the device of a synchronizing frame head by transmission equipment, this transmission equipment comprises cross unit and business unit, it is characterized in that, said device comprises:
Cross unit information acquisition module, the relevant information that is used to obtain and preserve cross unit comprises the type and the selection mode of cross unit;
Selection mode changes judge module, is connected with cross unit information acquisition module, be used to detect said cross unit selection mode variation and to search locating module transmission detection signal;
The search locating module is used for when receiving the detection signal of selection mode variation judge module transmission search and positioning service frame head.
8. the device of synchronizing frame head by transmission equipment according to claim 7 is characterized in that, said search locating module also comprises:
Search module is used for writing corresponding business frame head synchronization value according to current main type with cross unit to the chip of business unit, and said chip is that frame head is searched in the center in the frame head orientation range with this synchronization value;
Locating module is used for being identified at business unit according to the traffic frame head and navigates to professional frame head.
9. the device of synchronizing frame head by transmission equipment according to claim 8 is characterized in that, further comprises in the said search module:
Frame head scope determination module is used for confirming professional frame head scope according to current master with the type of cross unit;
Professional frame head synchronization value determination module is used in determined professional frame head scope, searching the optimum position value as professional frame head synchronization value.
10. according to Claim 8 or the device of 9 synchronizing frame head by transmission equipment, it is characterized in that, further comprise in the search module:
The frame head orientation range is provided with module, is used for according to current main type with cross unit said frame head orientation range being set.
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| CN 200910105861 CN101500183B (en) | 2009-03-06 | 2009-03-06 | Method for synchronizing frame head by transmission equipment and apparatus thereof |
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| CN101958763B (en) * | 2010-10-11 | 2015-09-16 | 中兴通讯股份有限公司 | The method and system of time-slot cross multi-channel aligning |
| CN113709602B (en) * | 2020-05-20 | 2022-09-09 | 华为技术有限公司 | Chip synchronization method and related equipment |
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| CN1617469A (en) * | 2003-11-15 | 2005-05-18 | 华为技术有限公司 | Method for realizing different speed PDH service intercommunication in synchrounic optical network |
| CN1808925A (en) * | 2005-01-21 | 2006-07-26 | 华为技术有限公司 | Method and system of primary/standby selection and zero-loss switching for asynchronous signals |
| CN1812315A (en) * | 2005-01-25 | 2006-08-02 | 华为技术有限公司 | Multi-channel data signal processing method and apparatus |
| CN1921326A (en) * | 2006-08-29 | 2007-02-28 | 华为技术有限公司 | Method, device and system for main-standby inverting control |
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|---|---|---|---|---|
| CN1617469A (en) * | 2003-11-15 | 2005-05-18 | 华为技术有限公司 | Method for realizing different speed PDH service intercommunication in synchrounic optical network |
| CN1808925A (en) * | 2005-01-21 | 2006-07-26 | 华为技术有限公司 | Method and system of primary/standby selection and zero-loss switching for asynchronous signals |
| CN1812315A (en) * | 2005-01-25 | 2006-08-02 | 华为技术有限公司 | Multi-channel data signal processing method and apparatus |
| CN1921326A (en) * | 2006-08-29 | 2007-02-28 | 华为技术有限公司 | Method, device and system for main-standby inverting control |
Non-Patent Citations (1)
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| JP特开平4-249936A 1992.09.04 |
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