CN104184517A - Protection switching device for synchronous transfer module (STM)-1 upper optical interface and achieving method - Google Patents
Protection switching device for synchronous transfer module (STM)-1 upper optical interface and achieving method Download PDFInfo
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Abstract
The invention discloses a protection switching device for a synchronous transfer module (STM)-1 upper optical interface and an achieving method and relates to the field of STM-1 upper optical interfaces for a gigabit passive optical network (GPON) system. The protection switching device comprises a complex programmable logic device (CPLD), an optical interface chip supporting a two-way STM-1 optical interface, a primary STM-1 demultiplexing chip, a primary circuit simulation CES chip, a primary physical layer (PHY) chip, a standby STM-1 demultiplexing chip, a standby CES chip, a standby PHY chip, a switching control chip, an exchange chip and a backing plate. A primary optical path channel of the optical interface chip is connected with the switching control chip sequentially through the primary STM-1 demultiplexing chip, the primary CES chip and the primary PHY chip; and a standby optical path channel of the optical interface chip is connected with the switching control chip sequentially through the standby STM-1 demultiplexing chip, the standby CES chip and the standby PHY chip. According to the protection switching device, the time needed for performing protection switching on the STM-1 upper optical interface is short, and operators' requirements can be met.
Description
Technical field
The present invention relates to GPON (Gigabit Passive Optical Network; gigabit passive optical network) STM-1 of system (STM-Synchronous Transfer Module; synchronous transfer mode) first line of a couplet Guang Kou field, is specifically related to a kind of protection changeover apparatus and implementation method of the STM-1 first line of a couplet light mouth for GPON system.
Background technology
The upper connecting port that belongs to traditional GPON system at STM-1 interface, STM-1 light mouth demultiplexing E1 signal is out packaged into standard ethernet bag by having the special chip of CES technology, GPON system transfers to ONU by Ethernet bag, after ONU resolves Ethernet message, obtains the output of E1 signal.
At present; existing STM-1 light mouth is protected while switching; the STM-1 optical interface chip of support 2 road STM-1 optical interfaces that generally 2 optical modules is accessed to the OLT equipment of GPON, 2 optical modules are realized protection according to the testing mechanism of STM-1 optical interface chip internal and are switched.2 optical modules carry out demultiplexing by the signal of 1 group of 155M by 1 2M demultiplexing chip, obtain 63 2M signals, and 63 2M signals consist of after standard ethernet message 1 CES emulation chip, through GPON system, are sent to ONU side.
Development along with the communication technology; the requirement that required time is switched to the protection of STM-1 light mouth by the operator of GPON system is more and more higher; and testing mechanism by STM-1 optical interface chip internal is realized protection to switch required detection time longer, be difficult to meet the demand of operator.
Summary of the invention
For the limitation existing in prior art; the object of the present invention is to provide a kind of protection changeover apparatus and implementation method of the STM-1 first line of a couplet light mouth for GPON system; the present invention protects to STM-1 first line of a couplet light mouth that to switch the required time shorter, can meet the demand of operator.
For reaching above object, the technical scheme that the present invention takes is: a kind of protection changeover apparatus of the STM-1 first line of a couplet light mouth for GPON system, the upper united dish of the STM-1 unit that comprises the OLT equipment of GPON system, the upper united dish of described STM-1 unit comprises CPLD, supports optical interface chip, primary STM-1 demultiplexing chip, primary circuit simulation CES chip, primary PHY chip, standby STM-1 demultiplexing chip, standby CES chip, standby PHY chip, switching control chip, exchange chip and the backboard of 2 road STM-1 optical interfaces;
Described optical interface chip comprises primary path channels and standby path channels, and CPLD is connected with the primary path channels of optical interface chip, standby path channels, switching control chip respectively; The primary path channels of optical interface chip is connected with switching control chip by primary STM-1 demultiplexing chip, primary CES chip, primary PHY chip successively; The standby path channels of optical interface chip is connected with switching control chip by standby STM-1 demultiplexing chip, standby CES chip, standby PHY chip successively, and switching control chip is also connected with backboard by exchange chip;
Described protection changeover apparatus is protected while switching, and 1 primary optical module is connected with the primary path channels of optical interface chip, and 1 standby optical module is connected with the standby path channels of optical interface chip; Primary optical module sends primary Los signal to CPLD, and standby optical module sends standby Los signal to CPLD; CPLD is switched logic and is judged whether primary Los signal is lost by default:
If primary Los signal is not lost, CPLD controls primary optical module and sends to primary STM-1 demultiplexing chip the primary signal that 1 group of speed is 155M, primary STM-1 demultiplexing chip carries out demultiplexing to primary signal, the primary demultiplexed signal that formation 1 Zu32 road speed is 2M; Primary demultiplexed signal is consisted of after the primary Ethernet message of standard CES chip and PHY chip, be sent to switching control chip; Switching control chip is transferred to primary Ethernet message backboard and is sent to ONU side through GPON system by exchange chip;
If primary Los dropout, CPLD controls standby optical module and sends to standby STM-1 demultiplexing chip the space signal that 1 group of speed is 155M, standby STM-1 demultiplexing chip carries out demultiplexing to space signal, the standby demultiplexed signal that formation 1 Zu32 road speed is 2M; Standby demultiplexed signal is consisted of after the standby Ethernet message of standard CES chip and PHY chip, be sent to switching control chip; Switching control chip is transferred to standby Ethernet message backboard and is sent to ONU side through GPON system by exchange chip.
On the basis of technique scheme, described primary STM-1 demultiplexing chip and standby STM-1 demultiplexing chip are all selected 2M demultiplexing chip.
A protection reverse method for the STM-1 first line of a couplet light mouth for GPON system based on above-mentioned protection changeover apparatus, comprises the following steps:
Step 1,1 primary optical module is connected with the primary path channels of optical interface chip, 1 standby optical module is connected with the standby path channels of optical interface chip; Primary optical module sends primary Los signal to CPLD, and standby optical module sends standby Los signal to CPLD; CPLD is switched logic and is judged whether primary Los signal is lost by default, if not, forward step 2 to, otherwise forward step 3 to;
Step 2, CPLD control primary optical module and send to primary STM-1 demultiplexing chip the primary signal that 1 group of speed is 155M, and primary STM-1 demultiplexing chip carries out demultiplexing to primary signal, the primary demultiplexed signal that formation 1 Zu32 road speed is 2M; Primary demultiplexed signal is consisted of after the primary Ethernet message of standard CES chip and PHY chip, be sent to switching control chip; Switching control chip is transferred to primary Ethernet message backboard and is sent to ONU side through GPON system by exchange chip;
Step 3, CPLD control standby optical module and send to standby STM-1 demultiplexing chip the space signal that 1 group of speed is 155M, and standby STM-1 demultiplexing chip carries out demultiplexing to space signal, the standby demultiplexed signal that formation 1 Zu32 road speed is 2M; Standby demultiplexed signal is consisted of after the standby Ethernet message of standard CES chip and PHY chip, be sent to switching control chip; Switching control chip is transferred to standby Ethernet message backboard and is sent to ONU side through GPON system by exchange chip.
The implementation method that the protection of the STM-1 first line of a couplet light mouth for GPON system based on above-mentioned protection changeover apparatus is switched, comprises the following steps:
Step 1, the mode of operation of the upper united dish optical interface chip of the STM-1 of the OLT equipment of GPON system is changed to 2 road direct mode operations by concurrent choosing receipts pattern;
Step 2, the mode of operation of the chip of the ONU equipment of GPON system is changed to first-in first-out pattern by Ethernet interface sending mode;
Step 3, the upper united dish of STM-1 unit is connected and is tested with extraneous testing equipment.
On the basis of technique scheme, testing equipment described in step 3 comprises E1 test instrumentation, transmission equipment, primary optical module, standby optical module, main crosspoint, PON interface unit, ODN equipment and ONU equipment; Described E1 test instrumentation, primary optical module, standby optical module and ONU equipment are provided with E1 interface, and described transmission equipment comprises primary E1 interface, standby E1 interface and test E1 interface;
Described in step 3, the upper united dish of STM-1 unit is connected and is comprised the following steps with extraneous testing equipment:
Primary optical module is connected with the primary path channels of the optical interface chip of the upper united dish of STM-1 unit, standby optical module is connected with the standby path channels of the optical interface chip of the upper united dish of STM-1 unit; Connect successively the upper united dish of STM-1 unit, main crosspoint, PON interface unit, ODN equipment and ONU equipment;
By the transmission Tx circuit of the E1 interface of ONU equipment, be connected with the reception Rx circuit of the E1 interface of E1 test instrumentation; By the Tx circuit of the E1 interface of E1 test instrumentation, be connected with the test E1 interface Rx circuit of transmission equipment; By the Tx circuit of the primary E1 interface of transmission equipment, be connected with the Rx circuit of the E1 interface of primary optical module; The Tx circuit of the standby E1 interface of transmission equipment is connected with the Rx circuit of the E1 interface of standby optical module.
Compared with prior art, the invention has the advantages that:
Protection changeover apparatus of the present invention comprises primary STM-1 demultiplexing chip, primary CES chip, primary PHY chip, standby STM-1 demultiplexing chip, standby CES chip, standby PHY chip and switching control chip; primary STM-1 demultiplexing chip, primary CES chip and primary PHY chip form primary light path, and standby STM-1 demultiplexing chip, standby CES chip and standby PHY chip form standby light path.When the protection that the present invention carries out STM-1 first line of a couplet light mouth is switched, primary optical module sends primary Ethernet message to switching control chip by primary light path, and standby optical module sends standby Ethernet message to switching control chip by standby light path; Whether CPLD directly loses to judge whether to protect to switch by the primary Los signal of primary optical module.
Realize protection with the testing mechanism (being software program) by STM-1 optical interface chip internal in prior art and switch and compare, the present invention can directly carry out simple judgement by CPLD (being hardware) can draw whether need to protect to switch.The present invention mainly relies on hardware detection to carry out circuit switching; coordinate software configuration mode to realize protection and switch, its protection switch time is very fast, while testing by protection reverse method of the present invention; can significantly shorten protection and switch the required time, and then meet the demand of operator.
Accompanying drawing explanation
Fig. 1 is for the structured flowchart of the protection changeover apparatus of the STM-1 first line of a couplet light mouth of GPON system in the embodiment of the present invention;
Fig. 2 is the structured flowchart that in the embodiment of the present invention, the upper united dish of STM-1 unit is connected with extraneous testing equipment.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.
Shown in Figure 1, the protection changeover apparatus of the STM-1 first line of a couplet light mouth for GPON system in the embodiment of the present invention, OLT (the optical line terminal that comprises GPON system, optical line terminal) the upper united dish of the STM-1 of equipment unit, the upper united dish of STM-1 unit comprises CPLD (Complex Programmable Logic Device, CPLD), support the optical interface chip of 2 road STM-1 optical interfaces, primary STM-1 demultiplexing chip, primary CES (circuit simulation) chip, primary PHY (physical layer) chip, standby STM-1 demultiplexing chip, standby CES chip, standby PHY chip, switching control chip, exchange chip and backboard.
Optical interface chip comprises primary path channels and standby path channels, and CPLD is connected with the primary path channels of optical interface chip, standby path channels, switching control chip respectively.The primary path channels of optical interface chip is connected with switching control chip by primary STM-1 demultiplexing chip, primary CES chip, primary PHY chip successively; The standby path channels of optical interface chip is connected with switching control chip by standby STM-1 demultiplexing chip, standby CES chip, standby PHY chip successively, and switching control chip is also connected with backboard by exchange chip.
Primary STM-1 demultiplexing chip in the present embodiment and standby STM-1 demultiplexing chip are all selected 2M demultiplexing chip.
The protection reverse method of the STM-1 first line of a couplet light mouth for GPON system based on above-mentioned protection changeover apparatus in the embodiment of the present invention, comprises the following steps:
S101: 1 primary optical module is connected with the primary path channels of optical interface chip, 1 standby optical module is connected with the standby path channels of optical interface chip.
S102: primary optical module sends primary Los (Lost of synchronous, synchronization loss signal) signal to CPLD, and standby optical module sends standby Los signal to CPLD; CPLD is switched logic and is judged whether primary Los signal is lost by default, if not, forward step S103 to, otherwise forward step S104 to.
S103:CPLD controls primary optical module and sends to primary STM-1 demultiplexing chip the primary signal that 1 group of speed is 155M, and primary STM-1 demultiplexing chip carries out demultiplexing to primary signal, the primary demultiplexed signal that formation 1 Zu32 road speed is 2M; Primary demultiplexed signal is consisted of after the primary Ethernet message of standard CES chip and PHY chip, be sent to switching control chip.Switching control chip is transferred to primary Ethernet message backboard and is sent to ONU (Optical Network Unit, optical network unit) side through GPON system by exchange chip;
S104:CPLD controls standby optical module and sends to standby STM-1 demultiplexing chip the space signal that 1 group of speed is 155M, and standby STM-1 demultiplexing chip carries out demultiplexing to space signal, the standby demultiplexed signal that formation 1 Zu32 road speed is 2M; Standby demultiplexed signal is consisted of after the standby Ethernet message of standard CES chip and PHY chip, be sent to switching control chip.Switching control chip is transferred to standby Ethernet message backboard and is sent to ONU side through GPON system by exchange chip.
The implementation method that the protection of the STM-1 first line of a couplet light mouth for GPON system based on above-mentioned protection changeover apparatus in the embodiment of the present invention is switched, comprises the following steps:
S201: the mode of operation of the upper united dish optical interface chip of the STM-1 of the OLT equipment of GPON system is changed to 2 road direct mode operations by concurrent choosing receipts pattern.
S202: the mode of operation of the chip of the ONU equipment of GPON system is changed to first-in first-out pattern by Ethernet interface sending mode.
S203: the upper united dish of STM-1 unit is connected and is tested with extraneous testing equipment.
Testing equipment comprises E1 test instrumentation, transmission equipment, primary optical module, standby optical module, main crosspoint, PON interface unit, ODN (Optical Distribution Network, Optical Distribution Network) equipment and ONU equipment; E1 test instrumentation, primary optical module, standby optical module and ONU equipment are provided with E1 interface, and transmission equipment comprises primary E1 interface, standby E1 interface and test E1 interface.
The upper united dish of STM-1 unit is when extraneous testing equipment is connected, first primary optical module is connected with the primary path channels of the optical interface chip of the upper united dish of STM-1 unit, standby optical module is connected with the standby path channels of the optical interface chip of the upper united dish of STM-1 unit; Then connect successively the upper united dish of STM-1 unit, main crosspoint, PON interface unit, ODN equipment and ONU equipment.
Finally by Tx (transmission) circuit of the E1 interface of ONU equipment, be connected with Rx (reception) circuit of the E1 interface of E1 test instrumentation; By the Tx circuit of the E1 interface of E1 test instrumentation, be connected with the test E1 interface Rx circuit of transmission equipment; By the Tx circuit of the primary E1 interface of transmission equipment, be connected with the Rx circuit of the E1 interface of primary optical module; By the Tx circuit of the standby E1 interface of transmission equipment, be connected with the Rx circuit of the E1 interface of standby optical module.
The present invention is not limited to above-mentioned execution mode, for those skilled in the art, under the premise without departing from the principles of the invention, can also make some improvements and modifications, within these improvements and modifications are also considered as protection scope of the present invention.The content not being described in detail in this specification belongs to the known prior art of professional and technical personnel in the field.
Claims (5)
1. the protection changeover apparatus for the STM-1 first line of a couplet light mouth of GPON system, the upper united dish of the STM-1 unit that comprises the OLT equipment of GPON system, is characterized in that: the upper united dish of described STM-1 unit comprises CPLD, supports optical interface chip, primary STM-1 demultiplexing chip, primary circuit simulation CES chip, primary PHY chip, standby STM-1 demultiplexing chip, standby CES chip, standby PHY chip, switching control chip, exchange chip and the backboard of 2 road STM-1 optical interfaces;
Described optical interface chip comprises primary path channels and standby path channels, and CPLD is connected with the primary path channels of optical interface chip, standby path channels, switching control chip respectively; The primary path channels of optical interface chip is connected with switching control chip by primary STM-1 demultiplexing chip, primary CES chip, primary PHY chip successively; The standby path channels of optical interface chip is connected with switching control chip by standby STM-1 demultiplexing chip, standby CES chip, standby PHY chip successively, and switching control chip is also connected with backboard by exchange chip;
Described protection changeover apparatus is protected while switching, and 1 primary optical module is connected with the primary path channels of optical interface chip, and 1 standby optical module is connected with the standby path channels of optical interface chip; Primary optical module sends primary Los signal to CPLD, and standby optical module sends standby Los signal to CPLD; CPLD is switched logic and is judged whether primary Los signal is lost by default:
If primary Los signal is not lost, CPLD controls primary optical module and sends to primary STM-1 demultiplexing chip the primary signal that 1 group of speed is 155M, primary STM-1 demultiplexing chip carries out demultiplexing to primary signal, the primary demultiplexed signal that formation 1 Zu32 road speed is 2M; Primary demultiplexed signal is consisted of after the primary Ethernet message of standard CES chip and PHY chip, be sent to switching control chip; Switching control chip is transferred to primary Ethernet message backboard and is sent to ONU side through GPON system by exchange chip;
If primary Los dropout, CPLD controls standby optical module and sends to standby STM-1 demultiplexing chip the space signal that 1 group of speed is 155M, standby STM-1 demultiplexing chip carries out demultiplexing to space signal, the standby demultiplexed signal that formation 1 Zu32 road speed is 2M; Standby demultiplexed signal is consisted of after the standby Ethernet message of standard CES chip and PHY chip, be sent to switching control chip; Switching control chip is transferred to standby Ethernet message backboard and is sent to ONU side through GPON system by exchange chip.
2. the protection changeover apparatus of STM-1 first line of a couplet light mouth as claimed in claim 1, is characterized in that: described primary STM-1 demultiplexing chip and standby STM-1 demultiplexing chip are all selected 2M demultiplexing chip.
3. the protection reverse method based on protecting the STM-1 first line of a couplet light mouth for GPON system of changeover apparatus described in claim 1 or 2, is characterized in that: comprise the following steps:
Step 1,1 primary optical module is connected with the primary path channels of optical interface chip, 1 standby optical module is connected with the standby path channels of optical interface chip; Primary optical module sends primary Los signal to CPLD, and standby optical module sends standby Los signal to CPLD; CPLD is switched logic and is judged whether primary Los signal is lost by default, if not, forward step 2 to, otherwise forward step 3 to;
Step 2, CPLD control primary optical module and send to primary STM-1 demultiplexing chip the primary signal that 1 group of speed is 155M, and primary STM-1 demultiplexing chip carries out demultiplexing to primary signal, the primary demultiplexed signal that formation 1 Zu32 road speed is 2M; Primary demultiplexed signal is consisted of after the primary Ethernet message of standard CES chip and PHY chip, be sent to switching control chip; Switching control chip is transferred to primary Ethernet message backboard and is sent to ONU side through GPON system by exchange chip;
Step 3, CPLD control standby optical module and send to standby STM-1 demultiplexing chip the space signal that 1 group of speed is 155M, and standby STM-1 demultiplexing chip carries out demultiplexing to space signal, the standby demultiplexed signal that formation 1 Zu32 road speed is 2M; Standby demultiplexed signal is consisted of after the standby Ethernet message of standard CES chip and PHY chip, be sent to switching control chip; Switching control chip is transferred to standby Ethernet message backboard and is sent to ONU side through GPON system by exchange chip.
4. the implementation method that the protection based on protecting the STM-1 first line of a couplet light mouth for GPON system of changeover apparatus described in claim 1 or 2 is switched, is characterized in that: comprise the following steps:
Step 1, the mode of operation of the upper united dish optical interface chip of the STM-1 of the OLT equipment of GPON system is changed to 2 road direct mode operations by concurrent choosing receipts pattern;
Step 2, the mode of operation of the chip of the ONU equipment of GPON system is changed to first-in first-out pattern by Ethernet interface sending mode;
Step 3, the upper united dish of STM-1 unit is connected and is tested with extraneous testing equipment.
5. the implementation method that the protection of STM-1 first line of a couplet light mouth as claimed in claim 4 is switched, is characterized in that: testing equipment described in step 3 comprises E1 test instrumentation, transmission equipment, primary optical module, standby optical module, main crosspoint, PON interface unit, ODN equipment and ONU equipment; Described E1 test instrumentation, primary optical module, standby optical module and ONU equipment are provided with E1 interface, and described transmission equipment comprises primary E1 interface, standby E1 interface and test E1 interface;
Described in step 3, the upper united dish of STM-1 unit is connected and is comprised the following steps with extraneous testing equipment:
Primary optical module is connected with the primary path channels of the optical interface chip of the upper united dish of STM-1 unit, standby optical module is connected with the standby path channels of the optical interface chip of the upper united dish of STM-1 unit; Connect successively the upper united dish of STM-1 unit, main crosspoint, PON interface unit, ODN equipment and ONU equipment;
By the transmission Tx circuit of the E1 interface of ONU equipment, be connected with the reception Rx circuit of the E1 interface of E1 test instrumentation; By the Tx circuit of the E1 interface of E1 test instrumentation, be connected with the test E1 interface Rx circuit of transmission equipment; By the Tx circuit of the primary E1 interface of transmission equipment, be connected with the Rx circuit of the E1 interface of primary optical module; The Tx circuit of the standby E1 interface of transmission equipment is connected with the Rx circuit of the E1 interface of standby optical module.
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| CN201410397811.XA CN104184517B (en) | 2014-08-13 | 2014-08-13 | Protection switching device for synchronous transfer module (STM)-1 upper optical interface and achieving method |
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| CN201410397811.XA CN104184517B (en) | 2014-08-13 | 2014-08-13 | Protection switching device for synchronous transfer module (STM)-1 upper optical interface and achieving method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107483103A (en) * | 2017-10-11 | 2017-12-15 | 深圳市新格林耐特通信技术有限公司 | OLT device and OLT device redundancy protected method |
| CN112383347A (en) * | 2020-10-29 | 2021-02-19 | 广东电网有限责任公司韶关供电局 | Power transmission system based on transmission network and leased public network |
| CN113365033A (en) * | 2021-06-04 | 2021-09-07 | 深圳市朗强科技有限公司 | Standby optical module selection method and equipment supporting audio and video data transmission |
-
2014
- 2014-08-13 CN CN201410397811.XA patent/CN104184517B/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107483103A (en) * | 2017-10-11 | 2017-12-15 | 深圳市新格林耐特通信技术有限公司 | OLT device and OLT device redundancy protected method |
| CN112383347A (en) * | 2020-10-29 | 2021-02-19 | 广东电网有限责任公司韶关供电局 | Power transmission system based on transmission network and leased public network |
| CN113365033A (en) * | 2021-06-04 | 2021-09-07 | 深圳市朗强科技有限公司 | Standby optical module selection method and equipment supporting audio and video data transmission |
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| CN104184517B (en) | 2017-02-15 |
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