CN101577635B - Undamaged switching method of frameless signal - Google Patents
Undamaged switching method of frameless signal Download PDFInfo
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- CN101577635B CN101577635B CN2009100846851A CN200910084685A CN101577635B CN 101577635 B CN101577635 B CN 101577635B CN 2009100846851 A CN2009100846851 A CN 2009100846851A CN 200910084685 A CN200910084685 A CN 200910084685A CN 101577635 B CN101577635 B CN 101577635B
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Abstract
The invention discloses an undamaged switching method of a frameless signal. The method uses idle resource of an HDLC frame of a 2M signal to reseal a 2M frameless signal and leads the signal to be framed in the transmission process, thus using the undamaged technology of the framed 2M signal to realize switching; the frameless 2M signal is restored after being switched, thus expanding the application range of a switching device.
Description
Technical field
The present invention relates to signal lossless and switch, relate in particular to a kind of undamaged switching method of frameless signal.
Background technology
On many important 2M communication lines; often the cable of dealing with to occur by the method that increases a backup 2M transmission line is dug disconnected; equipment fault; the serious interference of burst waits communication failure; the way of generally taking is to become two paths of signals respectively by two Network Transmission after the 2M signal process switching device shifter forwarding that will transmit; behind another switching protection of receiving terminal; switching protection by receiving terminal detects judgement to the two paths of signals of receiving, selects one of them fault-free or the relative signal forwarding preferably of quality to give final subscriber equipment by switching.
The mode of switching diminishes to be switched and harmless the switching, the method that diminishes switching is after device judges that the degradation of signal reaches the condition of switching, relay or switch with inside switch to another road by force, because handoff procedure needs the regular hour, so this process diminishes wound to signal.The harmless method of switching is that device is inserted into markers when sending in the Sa bit between the 2M signal frame, the device of receiving terminal gets up signal storage earlier, if wherein one road Signal Degrade causes alarm or error code, receiving end device detects markers from another road signal, according to markers aligned signal again, finish the recovery of signal then.
Summary of the invention
The invention provides a kind of also can be enough traditional method of no frame signal that makes and realize the undamaged switching method of frameless signal that not damaged switches.
For achieving the above object, the technical solution used in the present invention is as follows:
The first step, the HDLC frame of two-way 2048kbit/s signal is detected, bell idles is deducted;
The second 2048kbit/s signal that goes on foot, will deduct bell idles is sent into the FIFO of a depth-adjustment, extracts from described FIFO with the 1984kHz clock and obtains a 1984kbit/s signal, and this signal is sent into frame generator;
The 3rd step, the PCM frame of 64kbit/s is joined the 1984kbit/s signal, form the 2048kbit/s signal of band frame at frame generator;
The 2048kbit/s signal of the 4th step, the band frame that will encapsulate is again sent into the 1+1 backup network, and described 1+1 backup network has two routes, and when one tunnel Signal Degrade wherein, receiving terminal is tested to another road signal, enters next step;
The 2048kbit/s signal that the 5th step, receiving terminal will be come in carries out the frame check, removes the PCM frame, will go the 1984kbit/s signal of frame to send into FIFO;
The 6th step, recover the 2048kbit/s signal after the signal of sending into FIFO in the 5th step inserted the HDLC bell idles, finish harmless handoff procedure.
Beneficial effect of the present invention:
The present invention adopts the 2M signal by encapsulating no frame again to be used for transmission, makes no frame signal also can enough traditional methods realize that not damaged switches, and has widened the range of application of switching device shifter.
Description of drawings
Fig. 1 is a principle schematic of the present invention.
Embodiment
Utilizing the idling-resource of the HDLC frame of 2M signal to encapsulate 2M does not again have frame signal, makes signal be with frame in transmission course, thereby utilizes the injury-less technology of band frame 2M signal to realize switching, and recovers the 2M signal of no frame after switching again.
Referring to accompanying drawing 1, at first, detect the HDLC frame of two-way 2048kbit/s signal, and, the signal of deduction bell idles is sent into FIFO the bell idles deduction, utilize 1984kHz clock read output signal, this moment, signal became the signal of 1984kbit/s.Utilize the PCM frame of 64kbit/s that the signal that obtains is encapsulated, make signal become the band frame signal of 2048kbit/s, receiving terminal gets up signal storage earlier, send into the 1+1 backup network, when one road Signal Degrade wherein, the band frame signal of the 2048kbit/s that receiving terminal is then come in to another route is carried out the frame check by frame generator, remove the PCM frame, obtain the 1984kbit/s signal, to go the 1984kbit/s signal of frame to send into FIFO, utilize the clock of 2048KHZ to read the signal of 2048kbit/s, recover the HDLC frame, again obtain the signal of 2048kbie/s, finish harmless handoff procedure.
Claims (1)
1. a undamaged switching method of frameless signal comprises the steps:
The first step, the HDLC frame of two-way 2048kbit/s signal is detected, bell idles is deducted;
The second 2048kbit/s signal that goes on foot, will deduct bell idles is sent into the FIFO of a depth-adjustment, extracts from described FIFO with the 1984kHz clock and obtains a 1984kbit/s signal, and this signal is sent into frame generator;
The 3rd step, the PCM frame of 64kbit/s is joined the 1984kbit/s signal, form the 2048kbit/s signal of band frame at frame generator;
The 2048kbit/s signal of the 4th step, the band frame that will encapsulate is again sent into the 1+1 backup network, and described 1+1 backup network has two routes, and when one tunnel Signal Degrade wherein, receiving terminal is tested to another road signal, enters next step;
The 2048kbit/s signal that the 5th step, receiving terminal will be come in carries out the frame check, removes the PCM frame, will go the 1984kbit/s signal of frame to send into FIFO;
The 6th step, recover the 2048kbit/s signal after the signal of sending into FIFO in the 5th step inserted the HDLC bell idles, finish harmless handoff procedure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100846851A CN101577635B (en) | 2009-05-22 | 2009-05-22 | Undamaged switching method of frameless signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100846851A CN101577635B (en) | 2009-05-22 | 2009-05-22 | Undamaged switching method of frameless signal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101577635A CN101577635A (en) | 2009-11-11 |
| CN101577635B true CN101577635B (en) | 2011-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009100846851A Active CN101577635B (en) | 2009-05-22 | 2009-05-22 | Undamaged switching method of frameless signal |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108390745A (en) * | 2018-02-05 | 2018-08-10 | 柳州达迪通信技术股份有限公司 | A kind of lossless switching method of relay protection communication 2M signals |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0696111A2 (en) * | 1994-07-18 | 1996-02-07 | Nippon Telegraph And Telephone Corporation | A hitless path switching apparatus and method |
| US5577196A (en) * | 1993-04-07 | 1996-11-19 | Sprint Communications Co. L.P. | Intelligent digital signal hitless protection switch |
| CN1555168A (en) * | 2003-12-24 | 2004-12-15 | 烽火通信科技股份有限公司 | Damage-free switching method for main and spare synchronous digital series device timing source |
| CN1808926A (en) * | 2005-01-20 | 2006-07-26 | 北京格林威尔科技发展有限公司 | Method and apparatus of protective switching at both ends of non-framed 2M communication channel |
| CN101277164A (en) * | 2008-05-15 | 2008-10-01 | 中兴通讯股份有限公司 | Method for nondestructive switch of synchronous digital hierarchy service bus |
-
2009
- 2009-05-22 CN CN2009100846851A patent/CN101577635B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5577196A (en) * | 1993-04-07 | 1996-11-19 | Sprint Communications Co. L.P. | Intelligent digital signal hitless protection switch |
| EP0696111A2 (en) * | 1994-07-18 | 1996-02-07 | Nippon Telegraph And Telephone Corporation | A hitless path switching apparatus and method |
| CN1555168A (en) * | 2003-12-24 | 2004-12-15 | 烽火通信科技股份有限公司 | Damage-free switching method for main and spare synchronous digital series device timing source |
| CN1808926A (en) * | 2005-01-20 | 2006-07-26 | 北京格林威尔科技发展有限公司 | Method and apparatus of protective switching at both ends of non-framed 2M communication channel |
| CN101277164A (en) * | 2008-05-15 | 2008-10-01 | 中兴通讯股份有限公司 | Method for nondestructive switch of synchronous digital hierarchy service bus |
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| CN101577635A (en) | 2009-11-11 |
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