CN104579529B - A kind of method and apparatus of Synchronization Status Message - Google Patents
A kind of method and apparatus of Synchronization Status Message Download PDFInfo
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- CN104579529B CN104579529B CN201310500244.1A CN201310500244A CN104579529B CN 104579529 B CN104579529 B CN 104579529B CN 201310500244 A CN201310500244 A CN 201310500244A CN 104579529 B CN104579529 B CN 104579529B
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Abstract
The invention discloses a kind of method and apparatus of Synchronization Status Message, are applied in passive optical-fiber network PON network, including：Optical line terminal OLT obtains status information；The OLT generates state message according to the status information of acquisition, and type identification information is carried in the state message；The OLT sends the state message to optical node ONU, so that the ONU carries out the synchronization of status information according to the state message, to solve the problems, such as that the base station positioned at the downstreams ONU can not obtain status information.
Description
Technical field
The present invention relates to field of communication technology more particularly to a kind of method and apparatus of Synchronization Status Message.
Background technology
With the development of mobile communication technology, need the support for obtaining simultaneous techniques, as carrier frequency stabilization, up and down
Switching, roaming etc. between being aligned of row time slot, the transmission of reliable high quality, base station, are required to accurate synchronous control.Such as,
GSM（Global System For Mobile Communications, global system for mobile communications）、TD-SCDMA（Time
Division-Synchronization Code Division Multiple Access, the CDMA skill of time division synchronous
Art）、WCDMA（Wideband Code Division Multiple Access, WCDMA mobile communication system）、
CDMA2000、TD-LTE（Time Division Long Term Evolution, time-division long term evolution）、FDD-LTE
（Frequency Division Duplex-SCDMA, the Code Division Multiple Access of frequency division duplex）Equal base stations, are required to the same of frequency
Step；Such as, the base stations such as TD-SCDMA, CDMA2000, TD-LTE, it is also necessary to which accurate time synchronization is supported.
Conventionally, as PON（Passive Optical Network, passive optical-fiber network）Technology is had
Cost it is low, lay the features such as facilitating so that small base station, especially Home eNodeB are typically suitable for using the PON transmission technologys
It is returned.The needs of in order to meet base station frequency and time synchronization, this requires PON equipment to be passed from the synchronisation source of upstream
Pass frequency and time synchronization information to base station, as shown in Figure 1.
Inside PON network, clock synchronization mode is：Clock synchronizing function is completed using the physical line clock of PON,
OLT（Optical Line Terminal, optical line terminal）Equipment is high from network side line-recovered clock signal, or from outside
Clock signal is extracted in precision frequency source, and using the clock as PON line modulation clocks；ONU（Optical Network
Unit, optical node）Equipment is from PON line-timing signal recovered clocks, and using the clock recovered as user side line clock.
Inside PON network, time synchronizing method is：OLT transmits time information to ONU by downlink frame, when equipped with
When the frame of temporal information reaches ONU, ONU can use the temporal information and its response time to calculate high-precision local
Clock, and adjust the ONU times and be allowed to synchronous with OLT.
In the implementation of the present invention, inventor has found to have at least the following problems in the prior art：
Although existing PON simultaneous techniques realizes clock and time synchronization between OLT and ONU, ONU can not be known
The clock and time source information and synchronous regime of OLT, therefore, the base station in the downstreams ONU can not also obtain these information.And this
Two problems can be brought：
1, when OLT degrades to the synchronizing information of ONU, even if there are better clock and available time synchronization source in base station,
Such as the air interface synchronization between base station, due to that can not know that synchronisation source and Synchronization Status Message, base station also can not just switch tracking
Better clock time source.
2, ONU and base station can not obtain synchronisation source and Synchronization Status Message, influence Simultaneous Monitoring when synchronous failure occurs
And fault location function.
Invention content
The embodiment of the present invention is designed to provide a kind of method and apparatus of Synchronization Status Message, to solve existing middle nothing
The problem of base station positioned at the downstream sides optical node ONU that method is realized can not obtain status information.
In order to achieve the above object, an embodiment of the present invention provides a kind of methods of Synchronization Status Message, including：
Optical line terminal OLT obtains status information；
The OLT generates state message according to the status information of acquisition, and type of message mark is carried in the state message
Know information；
The OLT sends the state message to optical node ONU, so that the ONU carries out shape according to the state message
The synchronization of state information.
Preferably, the optical line terminal OLT obtains status information, including：
The OLT receives source information, extracts the status information wherein carried；Or,
The OLT generates the status information according to the state of the source information.
Preferably, when the source information is source clock information, the status information is clock status information,
The OLT generates state message according to the status information of acquisition, including：
The OLT generates clock status message according to the clock status information of acquisition, is carried in the clock status information
There is clock type of message identification information.
Preferably, when the source information is source time information, the status information is time state information,
The OLT generates state message according to the status information of acquisition, including：
The OLT is carried in the time state information according to the time state information generated time state message of acquisition
Having time type of message identification information.
Preferably, the ONU carries out the synchronization of status information according to the state message, specifically includes：
The ONU parses the state message according to the type of message identification information, obtains status information therein；
The ONU is packaged the status information of acquisition, and the message after encapsulation is sent to base station, after the encapsulation
Message in carry class information.
The embodiment of the present invention additionally provides a kind of optical line terminal OLT equipment, including：
Acquisition module, for obtaining status information；
Generation module carries message for generating state message according to the status information of acquisition in the state message
Type identification information；
Sending module, for sending the state message to optical node ONU, so that the ONU is according to the state message
Carry out the synchronization of status information.
Preferably, acquisition module is specifically used for receiving source information, extracts the status information wherein carried；Or, according to described
The state of source information generates the status information.
Preferably, when the source information is source clock information, the status information is clock status information,
The generation module is specifically used for：Clock status message, the clock are generated according to the clock status information of acquisition
Clock message type identification information is carried in status information.
Preferably, when the source information is source time information, the status information is time state information,
The generation module is specifically used for：According to the time state information generated time state message of acquisition, the time
Time message type identification information is carried in status information.
The embodiment of the present invention additionally provides a kind of optical node ONU equipment, which is characterized in that including：
Receiving module, the state message for receiving the transmission of optical line terminal OLT equipment；
Parsing module, for parsing the state message according to the type of message identification information of the message；
Acquisition module, the status information obtained for obtaining parsing；
Sending module carries the shape for the message after encapsulation to be sent to base station in the message after the encapsulation
State information.
Preferably, when the status information is clock status information,
The receiving module is specifically used for receiving the clock status message that the OLT device is sent, the clock status report
Clock message type identification information is carried in text.
Preferably, when the status information is time state information,
The receiving module is specifically used for receiving the time state message that the OLT device is sent, the time state report
Time message type identification information is carried in text.
Compared with prior art, the technical solution that the embodiment of the present invention is proposed has the following advantages：
By applying the technical scheme of the present invention, OLT device obtains status information；The OLT believes according to the state of acquisition
Breath generates state message, and type of message identification information is carried in the state message；The OLT sends the state to ONU
Message, the ONU Reseal the status information in the state message got, and the message after encapsulation is sent to base
It stands, to realize the shape between terminal OLT device and relaying ONU equipment between synchronous and ONU equipment and the base station of status information
The synchronization of state information.
Description of the drawings
Fig. 1 is PON synchronizing networks schematic diagram in the prior art；
Fig. 2 is the flow diagram of Synchronization Status Message provided in an embodiment of the present invention；
Fig. 3 is the flow diagram for the synchronised clock status information that the embodiment of the present invention one provides；
Fig. 4 is the flow diagram of status information synchronization time provided by Embodiment 2 of the present invention；
Fig. 5 is the module rack composition of OLT device provided in an embodiment of the present invention；
Fig. 6 is the module rack composition of ONU equipment provided in an embodiment of the present invention.
Specific implementation mode
Below in conjunction with the attached drawing in the present invention, the technical solution in the present invention is clearly and completely described, is shown
So, described embodiment is only the section Example of the present invention, instead of all the embodiments.Based on the reality in the present invention
Example is applied, all other embodiment obtained by those of ordinary skill in the art without making creative efforts all belongs to
In the scope of protection of the invention.
As shown in Fig. 2, for the method flow diagram of Synchronization Status Message provided in an embodiment of the present invention, which includes：
Step 201, OLT obtains status information.
Wherein, it when OLT receives multiple source information, chooses a wherein optimal source information and is extracted as status information
Object；Selection for source information can be chosen with basis signal principle of optimality, certainly, for how to choose the source information, by
In identical as selection mode in the prior art, therefore no longer it is specifically described herein；
For the status information of acquisition, if carrying original status information in the source information of the extraction, obtaining should
Original status information, if original status information is not carried in the source information, OLT gives birth to according to the state of the source information
The status information of Cheng Yixin.
Step 202, OLT generates state message according to the status information of acquisition, and message class is carried in the state message
Type identification information.
Wherein, OLT can carry the message for showing the type of message wherein when generating state message according to status information
Type identification information, and show the class information of the status information grade；Of course, if required, may be used also in state message
To carry other information, such as source id information, hop count etc. is transmitted.
When generating state message, if the status information in the state message and the parameter lattice in original status information
Formula is different, then also needs to through conversion process, to obtain meeting the state message of original status information format.
Step 203, OLT sends the state message to ONU, so that ONU carries out the synchronization of status information.
In the step, ONU is after the state message for receiving OLT transmissions, according to the type of message identification information of the message
It is parsed, obtains the status information wherein carried, and record the status information；The grade letter wherein carried can also be obtained
Breath, good source information is chosen according to the class information of the state message, so that downstream base station gets better shape
State information.
ONU is packaged the status information of acquisition, and the message after being encapsulated does not meet the message after the encapsulation
The case where format of oneself requirement, also needs to do conversion process, and the message finally obtained is sent to base station, is obtained by base station
Status information in the message, to the synchronization of completion status information, the encapsulation carried out herein is only sealed according to common message
Dress format is packaged, that is, not carrying type of message identification information in the message of the encapsulation.
In the present embodiment, OLT obtains status information, and state message, the state are generated according to the status information of acquisition
Carry type of message identification information and class information in message, OLT sends the state message to ONU so that ONU into
The synchronization of row status information, to realize the synchronous of status information between ONU and OLT.
The clock synchronization being often referred in PON network when synchronizing and time synchronization, and for how to realize OLT
Between equipment and ONU equipment and ONU equipment and the stationary problem of the status information between the base station of side downstream, below with several
A specific embodiment is described in detail, but is not limited to following embodiments.
Embodiment one
It is the flow diagram of synchronised clock status information provided in an embodiment of the present invention referring to Fig. 3, which can wrap
It includes：
Step 301, optical line terminal OLT equipment receives multiple clock input sources, chooses a clock input source.
Multiple clock input sources in this step can be the clock source of 2M external clocks input port input, be set by OLT
Clock source that standby first line of a couplet interface synchronization ether obtains passes through any one in the clock source that direct-connected satellite receiver obtains.
Step 302, OLT device obtains the clock status information of selected clock source.
Wherein, the clock status information can be clock source itself include can also be that clock source itself does not wrap
Contain；When in the clock source not including clock status information, including state of the OLT device meeting according to present clock source
Portion generates clock status information, the case where for not including clock status information in clock source, it may be possible to since OLT is directly logical
Satellite receiver is crossed to obtain clock source, or based on caused by onboard clock offer clock source.
For the clock status information of selection, which includes clock source ID, the grade of clock source, clock transmits hop count
Deng；
Wherein, clock source grade knows the state of the source information for downstream side, so that downstream side can believe according to the source
The grade of breath chooses more preferably source information；
It transmits hop count and knows the synchronization hop count information of the source information for downstream side, and in general, to transmit hop count more, it can shadow
The performance for ringing clock, brings shake and noise, so that downstream side can choose more good source information.
Step 303, OLT device generates clock status message using the clock status information, in the clock status message
Carry clock message type identification information.
Wherein, when OLT device generates clock status message using clock status information, if being wrapped in the clock status message
When the format difference of original clock status information of the state parameter format and extraction that contain, need to carry out clock status information
Format conversion, and then obtain satisfactory clock status message；
Clock source grade can be also carried in the clock status message.
Step 304, OLT device is to optical node ONU equipment tranmitting data register state message.
Step 305, ONU equipment parses the clock status message received, obtains the clock-like wherein carried
State information.
In this step, ONU equipment is after receiving clock status message, by clock message type identification information to this
Clock status message is parsed, and obtains clock status information therein, and recorded in equipment of itself；
ONU equipment can also obtain the clock source grade carried in the clock status message, to downstream base station in parsing
When sending message, more good source information can be chosen according to the clock source grade of the clock status message got, to make
It obtains downstream base station and gets better clock status information.
Step 306, the clock status Information encapsulation of acquisition is sent envelope by ONU equipment at clock status message, and to base station
Clock status message after dress.
Wherein, when the state parameter format of the clock status message after the encapsulation is with clock status information difference, equally
It needs to carry out format conversion to clock status information.
Step 307, base station obtains the clock status information in the clock status message.
In the present embodiment, optical line terminal OLT equipment receives multiple clock sources, chooses a clock source, and OLT device obtains
The clock status information of selected clock source, OLT device using the clock status information generate clock status message, this when
Carry clock message type identification information in clock state message, OLT device is to optical node ONU equipment tranmitting data register state report
Text, ONU equipment parse the clock status message received, obtain the clock status information wherein carried, ONU equipment
By the clock status Information encapsulation of acquisition at clock status message, and the clock status message after encapsulation is sent to base station, wherein
Carry clock source grade, base station obtains the clock status information in the clock status message, to realize OLT device with
Clock status information between ONU equipment and between ONU equipment and the base station in downstream side it is synchronous.
Embodiment two
It is the flow diagram of status information synchronization time provided in an embodiment of the present invention referring to Fig. 4, which can wrap
It includes：
Step 401, OLT device receives multiple time input sources, chooses a time input source.
Multiple time input sources in this step can be the time sources of the time input ports 1PPS+TOD input, pass through
The time source of the upper connecting port 1588v2 synchronous protocols acquisitions of OLT passes through appointing in the time source that direct-connected satellite receiver obtains
Meaning one.
Step 402, OLT device obtains the time state information of selected time input source.
Wherein, the time state information can be time source itself include can also be that time source itself does not wrap
Contain；When in the time source not including time state information, including state of the OLT device meeting according to current time source
Portion's generation time status information, the case where for not including clock status information in time source, it may be possible to since OLT is directly logical
Satellite receiver is crossed to obtain the time, or keep caused by time output is provided based on onboard clock.
For the time state information of selection, which includes time source ID, time grade, Time Transmission hop count etc. is right
The effect of hop count is transmitted in time grade therein and clock, it is identical as in above-mentioned clock status information, therefore, herein no longer
Do specific explaination.
Step 403, OLT device utilizes the time state information generated time state message, in the time state message
Carry time message type identification information.
Wherein, when OLT device utilizes time state information generated time state message, if being wrapped in the time state message
When the format difference of original time state information of the state parameter format and extraction that contain, need to carry out time status information
Format conversion, and then obtain satisfactory time state message；
Clock source grade can be also carried in the clock status message.
Step 404, OLT device is to optical node ONU equipment sending time state message.
Step 405, ONU equipment parses the time state message received, obtains the time shape wherein carried
State information.
In this step, ONU equipment is after receiving time state message, by time message type identification information to this
Time state message is parsed, and obtains time state information therein, and recorded in equipment of itself；
ONU equipment can also obtain the time source grade carried in the time state message, to downstream base station in parsing
When sending message, more good source information can be chosen according to the time source grade of the time state message got, to make
It obtains downstream base station and gets better time state information.
Step 406, the time state Information encapsulation of acquisition is sent envelope by ONU equipment at time state message, and to base station
Time state message after dress, wherein carrying clock source grade.
Wherein, when the state parameter format of the time state message after the encapsulation is with time state information difference, equally
It needs to carry out format conversion to time status information.
Step 407, base station obtains the time state information in the time state message.
In the present embodiment, optical line terminal OLT equipment receives multiple time sources, chooses a time source, and OLT device obtains
The time state information of selected time source, OLT device utilize the time state information generated time state message, this when
Between carry time message type identification information in state message, OLT device is to optical node ONU equipment sending time state report
Text, ONU equipment parse the time state message received, obtain the time state information wherein carried, ONU equipment
By the time state Information encapsulation of acquisition at time state message, and the time state message after encapsulation is sent to base station, wherein
Carry clock source grade, base station obtains the time state information in the time state message, to realize OLT device with
Time state information between ONU equipment and between ONU equipment and the base station in downstream side it is synchronous.
Based on design same as mentioned above, the embodiment of the present invention additionally provides a kind of OLT device, structural schematic diagram
As shown in figure 5, including：
Acquisition module 51, for obtaining status information；Specifically for receiving source information, the state letter wherein carried is extracted
Breath；Or, generating the status information according to the state of the source information；
Generation module 52 carries report for generating state message according to the status information of acquisition in the state message
Literary type identification information；
Sending module 53, for sending the state message to ONU, so that the ONU is carried out according to the state message
The synchronization of status information.
When the source information is source clock information, the status information is clock status information, the generation module 52
It is specifically used for：Clock status message is generated according to the clock status information of acquisition, clock is carried in the clock status information
Type of message identification information.
When the source information is source time information, the status information is time state information, the generation module 52
It is specifically used for：According to the time state information generated time state message of acquisition, having time is carried in the time state information
Type of message identification information.
Based on design same as mentioned above, the embodiment of the present invention additionally provides a kind of ONU equipment, structural schematic diagram
As shown in fig. 6, including：
Receiving module 61, the state message for receiving the transmission of optical line terminal OLT equipment；
Parsing module 62, for parsing the state message according to the type of message identification information of the message；
Acquisition module 63, the status information obtained for obtaining parsing；
Sending module 64 carries described for the message after encapsulation to be sent to base station in the message after the encapsulation
Status information.
When the status information is clock status information, the receiving module 61 is specifically used for receiving the OLT device
The clock status message of transmission carries clock message type identification information in the clock status message；
When the status information is time state information, the receiving module 61 is specifically used for receiving the OLT device
The time state message of transmission carries time message type identification information in the time state message.
Through the above description of the embodiments, those skilled in the art can be understood that the present invention can be by
Software adds the mode of required general hardware platform to realize, naturally it is also possible to which by hardware, but the former is more in many cases
Good embodiment.Based on this understanding, technical scheme of the present invention substantially in other words contributes to the prior art
Part can be expressed in the form of software products, which is stored in a storage medium, if including
Dry instruction is used so that a computer equipment（Can be personal computer, server or the network equipment etc.）Execute this hair
Method described in bright each embodiment.
It will be appreciated by those skilled in the art that attached drawing is the schematic diagram of a preferred embodiment, the module in attached drawing or stream
Journey is not necessarily implemented necessary to the present invention.
It will be appreciated by those skilled in the art that the module in device in embodiment can describe be divided according to embodiment
It is distributed in the device of embodiment, respective change can also be carried out and be located in one or more devices different from the present embodiment.On
The module for stating embodiment can be merged into a module, can also be further split into multiple submodule.
The embodiments of the present invention are for illustration only, can not represent the quality of embodiment.
Disclosed above is only several specific embodiments of the present invention, and still, the present invention is not limited to this, any ability
What the technical staff in domain can think variation should all fall into protection scope of the present invention.
Claims (4)
1. a kind of method of Synchronization Status Message is applied in passive optical-fiber network PON network, which is characterized in that including：
Optical line terminal OLT obtains status information, the status information include at least synchronisation source ID and synchronisation source grade with it is synchronous
Transmit hop count；
The OLT generates state message according to the status information of acquisition, and type of message mark letter is carried in the state message
Breath；
The OLT sends the state message to optical node ONU, so that the ONU carries out state letter according to the state message
The synchronization of breath；
Wherein, the optical line terminal OLT obtains status information, including：
The OLT receives source information, extracts the status information wherein carried；Or, the OLT generates institute according to the state of source information
State status information；
When the source information is source time information, the status information is time state information,
The OLT generates state message according to the status information of acquisition, including：
The OLT is according to the time state information generated time state message of acquisition, when being carried in the time state information
Between type of message identification information.
2. the method as described in claim 1, which is characterized in that the ONU carries out status information according to the state message
It is synchronous, it specifically includes：
The ONU parses the state message according to the type of message identification information, obtains status information therein；It is described
ONU is packaged the status information of acquisition, and the message after encapsulation is sent to base station,
Class information is carried in message after the encapsulation.
3. a kind of optical line terminal OLT equipment, which is characterized in that including：Acquisition module, for obtaining status information, the shape
State information include at least synchronisation source ID with it is synchronous
Source grade and synchronous transmission hop count；Generation module, for generating state message, the state according to the status information of acquisition
It is taken in message
With type of message identification information；
Sending module, for sending the state message to optical node ONU, so that the ONU is carried out according to the state message
The synchronization of status information；
Acquisition module is specifically used for receiving source information, extracts the status information wherein carried；Or, according to the shape of the source information
State generates the status information；
When the source information is source time information, the status information is time state information,
The generation module is specifically used for：According to the time state information generated time state message of acquisition, the time state
Time message type identification information is carried in information.
4. a kind of optical node ONU equipment, which is characterized in that including：Receiving module, for receiving optical line terminal OLT equipment hair
The state message sent；Parsing module, for parsing the state message according to the type of message identification information of the message；Obtain mould
Block, the status information obtained for obtaining parsing；Sending module, for the message after encapsulation to be sent to base station, the encapsulation
The status information is carried in message afterwards；
Wherein, when the status information is time state information,
The receiving module, is specifically used for receiving the time state message that the OLT device is sent, in the time state message
Carry time message type identification information.
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| CN101841736A (en) * | 2009-03-20 | 2010-09-22 | 中兴通讯股份有限公司 | Method and system for transferring time in passive optical network (PON) |
| CN101945468A (en) * | 2009-07-08 | 2011-01-12 | 大唐移动通信设备有限公司 | Method, system and device for clock synchronization |
| CN102237941A (en) * | 2010-04-28 | 2011-11-09 | 中兴通讯股份有限公司 | Time synchronization system and method |
| CN102237940A (en) * | 2010-05-04 | 2011-11-09 | 华为技术有限公司 | Method, system and device for transferring sync-status message (SSM) in passive optical network |
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