CN108429606A - The method of passing time status information, OLT, ONU and system - Google Patents
The method of passing time status information, OLT, ONU and system Download PDFInfo
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- CN108429606A CN108429606A CN201710075755.1A CN201710075755A CN108429606A CN 108429606 A CN108429606 A CN 108429606A CN 201710075755 A CN201710075755 A CN 201710075755A CN 108429606 A CN108429606 A CN 108429606A
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- onu
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1829—Arrangements specially adapted for the receiver end
- H04L1/1858—Transmission or retransmission of more than one copy of acknowledgement message
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/062—Synchronisation of signals having the same nominal but fluctuating bit rates, e.g. using buffers
- H04J3/0623—Synchronous multiplexing systems, e.g. synchronous digital hierarchy/synchronous optical network (SDH/SONET), synchronisation with a pointer process
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/16—Time-division multiplex systems in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted
- H04J3/1605—Fixed allocated frame structures
- H04J3/1652—Optical Transport Network [OTN]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q11/0067—Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/0635—Clock or time synchronisation in a network
- H04J3/0638—Clock or time synchronisation among nodes; Internode synchronisation
- H04J3/0658—Clock or time synchronisation among packet nodes
- H04J3/0661—Clock or time synchronisation among packet nodes using timestamps
- H04J3/0667—Bidirectional timestamps, e.g. NTP or PTP for compensation of clock drift and for compensation of propagation delays
Abstract
The embodiment of the invention discloses a kind of methods of passing time status information, including：The Ethernet synchronization message channel ESMC messages to be transmitted for carrying time state information are sent to optical network unit ONU by data channel.The system that the embodiment of the present invention also discloses a kind of OLT, ONU and passing time status information simultaneously.
Description
Technical field
The present invention relates to field of communication technology more particularly to a kind of method of passing time status information, optical line terminals
OLT, optical network unit ONU and system.
Background technology
In the process of network IPization, wireless base station needs to obtain more accurate temporal information, synchronizes and assists in precision clock
It discusses in (Precision Time Protocol, PTP), the light of passive optical network (Passive Optical Network, PON)
Line terminal (Optical Line Terminal, OLT) and optical network unit (Optical Network Terminal, ONU)
Because of the characteristics of network organizing, a boundary clock (Boundary Clock, BC) node, clock node tool are integrally regarded as
There are multiple ports PTP, it is believed by one of ports PTP from upstream clock node information synchronization time and time state
Breath, and pass through remaining port downstream clock node issuing time information and time state information.
PON access technologies are broadly divided into gigabit passive optical network (Gigabit-Capable Passive Optical
Network, GPON) access technology and Ethernet passive optical network (Ethernet Passive Optical Network,
EPON) access technology；For the PTP device nodes of downstream, the time source of time state information relationship to downstream selects source, right and wrong
Often important information needs the precision higher which time source is judged according to time state information when there are multiple time sources,
To the highest time source of choice accuracy, to ensure mobile retransmission business；But in existing protocol, GPON and EPON standards are all only
The passing time information between the OLT and ONU of PON network is defined in management passage, there are no define time state information to exist
How to be transmitted between OLT and ONU；Simultaneously as the management passage of GPON and EPON is different, the time is realized in management passage
The transmission of status information can not meet the requirement of GPON and EPON networks simultaneously again.
Invention content
In view of this, an embodiment of the present invention is intended to provide a kind of method of passing time status information, OLT, ONU and being
System to realize the transmission for carrying out time state information between the OLT and ONU of PON network, and realizes that GPON's and EPON is simultaneous
Hold, mobile retransmission business is made to be guaranteed.
In order to achieve the above objectives, the technical proposal of the invention is realized in this way：
The present invention provides a kind of method of passing time status information, the method includes：
The Ethernet synchronization message channel ESMC messages to be transmitted for carrying time state information are sent out by data channel
Give optical network unit ONU.
In said program, the Ethernet synchronization message channel ESMC messages to be transmitted that time state information will be carried
It is sent to optical network unit ONU by data channel, including：
The time state information is written to the data field of ESMC messages with the format of type lengths values TLV, and to institute
It states the organization unique identifier OUI field of ESMC messages and is formed after organizing sub-type field to modify described to be transmitted
ESMC messages are sent to the ONU by the data channel.
In said program, the Ethernet synchronization message channel ESMC to be transmitted for carrying time state information is reported described
After text is sent to optical network unit ONU by data channel, the method further includes：
When not receiving the feedback message that the ONU is sent by the data channel within a preset period of time, to described
ONU retransmits the ESMC messages to be transmitted；
Or, receiving the feedback message and institute that the ONU is sent by the data channel in the preset time period
Feedback message is stated when being not belonging to the message negotiated, the ESMC messages to be transmitted are retransmitted to the ONU.
The present invention provides a kind of method of passing time status information, the method includes：
It is same that the Ethernet to be transmitted for carrying time state information that optical line terminal OLT is sent is received by data channel
Walk message channel ESMC messages；
The ESMC messages to be transmitted received are parsed, the time state information is obtained.
It is described to carry time state information by what data channel reception optical line terminal OLT was sent in said program
Ethernet synchronization message channel ESMC messages to be transmitted, including：
The OLT that the OLT is sent is received by the time state information with type lengths values TLV by data channel
Format write-in ESMC messages data field, and by the organization unique identifier OUI field of the ESMC messages and tissue
The ESMC messages to be transmitted formed after type field modification.
In said program, the described pair of ESMC message to be transmitted received parses, and obtains the time state
Information, including：
TLV format fields in the data field of the ESMC messages to be transmitted received are extracted, are obtained
To the time state information.
In said program, the method further includes：
By the data channel feedback message is sent to the OLT；
In said program, the method further includes：
The ESMC messages to be transmitted that the OLT is sent are received again by the data channel.
The present invention provides a kind of optical line terminal OLT, and the OLT includes：
Sending module, for leading to the Ethernet synchronization message channel ESMC messages to be transmitted for carrying time state information
It crosses data channel and is sent to optical network unit ONU.
In said program, the sending module is specifically used for the time state information with the lattice of type lengths values TLV
The data field of ESMC messages is written in formula, and to the organization unique identifier OUI field of the ESMC messages and tissue subtype
The ESMC messages to be transmitted that field is formed after modifying are sent to the ONU by the data channel.
In said program, the OLT further includes：
Determining module, for not receiving the feedback that the ONU is sent by the data channel within a preset period of time
When message, the ESMC messages to be transmitted are retransmitted to the ONU；
Or, receiving the feedback message and institute that the ONU is sent by the data channel in the preset time period
Feedback message is stated when being not belonging to the message negotiated, the ESMC messages to be transmitted are retransmitted to the ONU.
The present invention provides a kind of optical network unit ONU, and the ONU includes：
Receiving module carries time state information for receive that optical line terminal OLT sends by data channel
Ethernet synchronization message channel ESMC messages to be transmitted；
Parsing module obtains the time state letter for being parsed to the ESMC messages to be transmitted received
Breath.
In said program, the receiving module, specifically for receiving the OLT that the OLT is sent by data channel
The time state information is written to the data field of ESMC messages with the format of type lengths values TLV, and the ESMC is reported
The ESMC messages to be transmitted formed after the organization unique identifier OUI field of text and tissue sub-type field modification.
In said program, the parsing module, specifically for the number to the ESMC messages to be transmitted received
It is extracted according to the TLV format fields in field, obtains the time state information.
In said program, the ONU further includes：
Sending module, for sending feedback message to the OLT by the data channel.
In said program, the receiving module is additionally operable to receive the institute that the OLT is sent again by the data channel
State ESMC messages to be transmitted.
The present invention provides a kind of system of passing time status information, and the system comprises as described in said program
The OLT and ONU as described in said program.
The method of the passing time status information that the embodiment of the present invention is provided, OLT, ONU and system, will be taken by OLT
Ethernet synchronization message channel ESMC messages to be transmitted with time state information are sent to optical-fiber network list by data channel
First ONU；The transmission for carrying out time state information between the OLT and ONU of PON network is realized, and realizes GPON and EPON
Compatibility, so that mobile retransmission business is guaranteed.
Description of the drawings
Fig. 1 is the flow chart of the embodiment of the method one of passing time status information of the present invention；
Fig. 2 is the flow chart of the embodiment of the method two of passing time status information of the present invention；
Fig. 3 is the flow chart of the embodiment of the method three of passing time status information of the present invention；
Fig. 4 is the TLV structural schematic diagrams defined in IEEE802.3；
Fig. 5 be G.8264 defined in ESMC messages format；
Fig. 6 is that time state information transmits message；
Fig. 7 is the structural schematic diagram of OLT embodiments of the present invention；
Fig. 8 is the structural schematic diagram of ONU embodiments of the present invention；
Fig. 9 is the structural schematic diagram of the system embodiment of passing time status information of the present invention.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes.
Embodiment one
Fig. 1 is the flow chart of the embodiment of the method one of passing time status information of the present invention；As shown in Figure 1, the present invention is real
The method for applying the passing time status information of example offer may include steps of：
Step 101：The Ethernet synchronization message channel ESMC messages to be transmitted for carrying time state information are passed through into number
It is sent to optical network unit ONU according to channel.
After OLT gets time state information, the Ethernet synchronization message to be transmitted of time state information will be carried
Channel (Ethernet Synchronization Messaging Channel, ESMC) message is sent to light by data channel
Network element ONU.
Specifically, after OLT gets time state information, by the time state information with type lengths values (Type
Length Value, TLV) format write-in ESMC messages data field, and to the tissue unique mark of the ESMC messages
Symbol (Organizationally Unique Identifier, OUI) field and tissue sub-type field are modified, and will be changed
The ESMC messages afterwards form ESMC messages to be transmitted；It then will be described to be transmitted such as the channels ESMC by data channel
ESMC messages are sent to ONU.
OLT after the ESMC messages to be transmitted are sent to ONU, execute step 102, or execute step 103 to
Step 104, specially：
Step 102：The ESMC messages to be transmitted are not retransmitted to ONU.
After the ESMC messages to be transmitted are sent to ONU, acquiescence ONU is successfully received described to be transmitted OLT
ESMC messages no longer retransmit the ESMC messages to be transmitted to ONU.
Step 103：The feedback message that the ONU is sent is received by the data channel.
OLT connects after the ESMC messages to be transmitted are sent to ONU, by the data channel such as the channels ESMC
Receive the feedback message that the ONU is sent.
Step 104：Determine whether that the ONU retransmissions are described to be transmitted with the feedback message according to preset rules
ESMC messages.
OLT receives the feedback message that the ONU is sent by the data channel, and judge within a preset period of time whether
The feedback message that the ONU is sent is received, if being not received by the institute that the ONU is sent in the preset time period
Feedback message is stated, then OLT retransmits the ESMC messages to be transmitted to the ONU；If OLT is inscribed in the preset time period
The feedback message that the ONU is sent is received, then judges whether the feedback message meets warranty term again, if the feedback
Message is unsatisfactory for warranty term, then retransmits the ESMC messages to be transmitted to the ONU；If the feedback message meets association
Quotient's condition, it is determined that the ONU is successfully received the ESMC messages to be transmitted.
For example, preset time period is set as T seconds, OLT starts when sending ESMC messages to be transmitted to ONU by the channels ESMC
Timing；If OLT was not received by the feedback message of ONU transmissions within T seconds time, OLT retransmits ESMC to be transmitted to ONU
Message；If OLT had received the feedback message of ONU transmissions within T seconds time, judge whether the feedback message is to negotiate
Message, if feedback message is not belonging to the message negotiated, OLT retransmits ESMC messages to be transmitted to ONU；If feedback
Message belongs to the message negotiated, then OLT determines that ONU has been successfully received ESMC messages to be transmitted.
The method of passing time status information provided in an embodiment of the present invention, OLT will be by that will carry time state information
Ethernet synchronization message channel ESMC messages to be transmitted optical network unit ONU is sent to by data channel；It is waited for by described
Transmission ESMC messages are sent to after ONU, do not retransmit the ESMC messages to be transmitted to ONU；Alternatively, will be described to be passed
Defeated ESMC messages are sent to after ONU, and the feedback message that the ONU is sent is received by the data channel；According to default rule
Then determine whether that the ONU retransmits the ESMC messages to be transmitted with the feedback message；It realizes in PON network
The transmission of time state information is carried out between OLT and ONU, and it is compatible with EPON to realize GPON, and mobile retransmission business is made to obtain
To guarantee.
Embodiment two
Fig. 2 is the flow chart of the embodiment of the method two of passing time status information of the present invention；As shown in Fig. 2, the present invention is real
The method for applying the passing time status information of example offer may include steps of：
Step 201：The to be transmitted of time state information is carried by what data channel reception optical line terminal OLT was sent
ESMC messages.
ONU receives the OLT that OLT is sent time state information is long with type by data channel such as the channels ESMC
The data field of the format write-in ESMC messages of angle value TLV, and by the OUI field of the ESMC messages and organize sub-type field
The ESMC messages to be transmitted formed after modification.
After ONU receives the ESMC messages to be transmitted of OLT transmissions by data channel, step 202 and step are only executed
205, or execute step 203 to step 205, specially：
Step 202：Feedback message is not sent to the OLT.
After ONU receives the ESMC messages to be transmitted of OLT transmissions by data channel, acquiescence is successfully received described to be passed
Defeated ESMC messages do not send feedback message to the OLT.
Step 203：By the data channel feedback message is sent to the OLT.
After ONU receives the ESMC messages to be transmitted of OLT transmissions by data channel, by the data channel to OLT
Send feedback message；Wherein, the feedback message is the message that ONU and OLT negotiated, and can be that original ESMC to be transmitted is reported
Text, but not limited to this.
Step 204：The ESMC messages to be transmitted that the OLT is sent are received again by the data channel.
After ONU sends feedback message by the data channel to OLT, when OLT retransmits ESMC to be transmitted to ONU
When message, ONU receives the ESMC messages to be transmitted that the OLT is sent by the data channel again.
Step 205：The ESMC messages to be transmitted received are parsed, the time state information is obtained.
ONU parses the ESMC messages to be transmitted, i.e., after being successfully received the ESMC messages to be transmitted
TLV format fields in the data field of the ESMC messages to be transmitted are extracted, the time state letter is obtained
Breath.
The method of passing time status information provided in an embodiment of the present invention, ONU receive optical link end by data channel
The ESMC messages to be transmitted for carrying time state information for holding OLT to send；It is received by the data channel to be transmitted
Feedback message is not sent after ESMC messages to the OLT；Alternatively, receiving ESMC messages to be transmitted by the data channel
Afterwards, feedback message is sent to the OLT by the data channel；The OLT is received again by the data channel to send
The ESMC messages to be transmitted；After being successfully received the ESMC messages to be transmitted, to the ESMC messages to be transmitted
It is parsed, obtains the time state information；It realizes and carries out time state information between the OLT and ONU of PON network
It transmits, and it is compatible with EPON to realize GPON, and mobile retransmission business is made to be guaranteed.
Embodiment three
Fig. 3 is the flow chart of the embodiment of the method three of passing time status information of the present invention；As shown in figure 3, the present invention is real
The method for applying the passing time status information of example offer may include steps of：
Step 301：OLT forms the ESMC messages to be transmitted for carrying time state information.
OLT is after upstream clock node gets time state information, by the time state information with fixed in IEEE802.3
The data field of the TLV formats write-in ESMC messages of justice, and the OUI field of ESMC messages and tissue sub-type field are repaiied
Change, modified ESMC messages are packaged, forms ESMC messages to be transmitted.
Fig. 4 is the TLV structural schematic diagrams defined in IEEE802.3；As shown in figure 4, TLV structures are by type of message Type
(accounting for 1 byte), message length Length (accounting for 2 bytes) and data filling Data plus padding are (in storage message
Hold) three parts composition；For the parameter of time state information, such as time attribute, the corresponding TLV structures of domain code, Dou Neng
It is found in IEEE1588 protocol definitions.
Specifically, when carrying out time state information using ESMC messages and transmitting, need to the ESMC reports defined in G.8264
The OUI field and tissue sub-type field of text are modified, and data word is written in the time state information for meeting TLV formats
Section, group packet obtain ESMC messages to be transmitted.
Fig. 5 be G.8264 defined in ESMC messages format；As shown in figure 5, the OUI field of the ESMC messages is located at the
16 to 18 octet data positions occupy 3 eight byte lengths；Tissue sub-type field is located at the 19th to 20 octet data position,
Occupy 2 eight byte lengths；Data field is located at the 25th to 1532 octet data position, and it is long can to occupy 36 to 1490 eight hytes
Degree.
Fig. 6 is that time state information transmits message；The transmission message is ESMC messages to be transmitted；As shown in fig. 6, this is waited for
It is to be filled modification according to the format of ESMC messages shown in fig. 5, and package to transmit ESMC messages, specific real
Now process is：
1) the dst-mac fields in Fig. 6 fill in the ESMC message medium access control (Medium G.8264 defined
Access Control, MAC) address：01-80-C2-00-00-02 (hexadecimal)；
2) the src-mac fields in Fig. 6 fill in the MAC of OLT itself；
3) the ether-type fields in Fig. 6 fill in the ESMC type of messages G.8264 defined：88-09 (hexadecimal)；
4) the sub-type fields in Fig. 6 fill in the ESMC message subtypes G.8264 defined：0A (hexadecimal)；
5) OUI field in Fig. 6 fills in the OUI of arbitrary unit and tissue；
6) the organization sub-type in Fig. 6 (tissue subtype) field can fill in any unit and tissue
The subclass model of definition；
7) (the version and information) fields of the version＆information in Fig. 6 according to the message be event message or
Informational message is filled in：Event message fills in 18 (hexadecimals), and informational message fills in 10 (hexadecimals)；
8) reserved in Fig. 6 (reservation) field can be filled in any type of value；
9) data in Fig. 6 (data) field fills in the following field defined in 1588 agreements of IEEE, but be not limited only to as
Lower field：
●TIME_PROPERTIES_DATA_SET
●PARENT_DATA_SET
●DOMAIN
●CURRENT_DATA_SET
Above-mentioned field is the parameter of time state information, and the format that the format of each field is TLV；The data
It can also be superimposed in field any meeting TLV formats with the relevant other information of time state.
10) Frame Check Sequence (the Frame Check of 4 bytes are generated according to the method that the 4th chapters of IEEE802.3 define
Sequence, FCS), the fcs fields being filled up in Fig. 6.
Step 302：OLT sends ESMC messages to be transmitted by data channel to ONU.
After OLT generates ESMC messages to be transmitted, the ESMC messages to be transmitted are sent out such as the channels ESMC by data channel
Give ONU.
After ONU receives the ESMC messages to be transmitted of OLT transmissions by data channel, interacted using two ways：
Mode one：ONU does not send feedback message to OLT, that is, executes step 303；
Mode two：ONU sends feedback message to OLT, that is, executes step 304 to step 309；
Specifically implementation procedure is：
Step 303：ONU does not send feedback message to OLT, is directly parsed to the ESMC messages to be transmitted received,
Obtain time state information.
After ONU receives the ESMC messages to be transmitted of OLT transmissions by data channel, OLT acquiescences ONU is successfully received this
ESMC messages to be transmitted, then ONU is not sent to OLT feeds back message, is directly parsed to the ESMC messages to be transmitted received,
Obtain time state information.
Step 304：ONU sends feedback message by data channel to OLT.
After ONU receives the ESMC messages to be transmitted of OLT transmissions by data channel, sent out to OLT by the data channel
Send feedback message.
Step 305：OLT judges whether receive the feedback message of ONU transmissions within a preset period of time.
ONU by data channel to OLT send feedback message after, OLT then judge within a preset period of time, as OLT to
ONU started when sending ESMC messages to be transmitted in the 1s times after timing, if receives the feedback message of ONU transmissions；If OLT
Within a preset period of time, the feedback message sent as in the 1s times, having received ONU, thens follow the steps 306；If OLT is default
It is not received by the feedback message of ONU transmissions in period, thens follow the steps 307.
Step 306：OLT judges to feed back whether message is the message negotiated.
After OLT receives the feedback message of ONU transmissions within a preset period of time, judge whether the feedback message is to negotiate
Message, the message of the negotiation can be original ESMC messages to be transmitted, but not limited to this；If the feedback message is not association
The message that quotient crosses, thens follow the steps 307；If the feedback message is the message negotiated, 308 are thened follow the steps to step 309.
Step 307：OLT retransmits ESMC messages to be transmitted to ONU.
OLT receives the feedback message of ONU transmissions within a preset period of time, but the feedback message is not the message negotiated
When, OLT then determines that ONU is not successfully receiving ESMC messages to be transmitted, at this point, OLT retransmits the ESMC to be transmitted to ONU
Message.
Step 308：OLT determines that ONU is successfully received ESMC messages to be transmitted.
OLT receives the feedback message of ONU transmissions within a preset period of time, and judges that the feedback message was negotiated
When message, OLT then determines that ONU has been successfully received ESMC messages to be transmitted, no longer retransmits the ESMC reports to be transmitted to ONU
Text.
Step 309：ONU parses the ESMC messages to be transmitted received, obtains time state information.
After determining that ONU has been successfully received ESMC messages to be transmitted, ONU solves the ESMC messages to be transmitted
Analysis, i.e., extract the TLV format fields in the data field of the ESMC messages to be transmitted, get time state information.
For example, after ONU receives the ESMC messages to be transmitted that OLT is sent by ESMC data channel, ONU is to be transmitted by this
ESMC messages are sent to OLT as feedback message by ESMC data channel；OLT to ONU when sending ESMC messages to be transmitted
Start to judge whether to receive the feedback message in the preset time period of the 1s after timing, if in the preset time period of 1s not having
The feedback message is received, then confirms that ONU is not successfully receiving ESMC messages to be transmitted, at this point, OLT is retransmitted to ONU
The ESMC messages to be transmitted；If OLT has received the feedback message in the preset time period of 1s, OLT continues to judge that this is anti-
Present whether message is the message negotiated, i.e., whether the feedback message is ESMC messages to be transmitted, if the feedback message is not
ESMC messages to be transmitted, then OLT determines that ONU is not successfully receiving ESMC messages to be transmitted, at this point, OLT is retransmitted to ONU
ESMC messages to be transmitted；If the feedback message is ESMC messages to be transmitted, it is to be transmitted that OLT determines that ONU has been successfully received
ESMC messages no longer retransmit ESMC messages to be transmitted to ONU.
Time state information is written by OLT for the method for passing time status information provided in an embodiment of the present invention
ESMC messages, and modify to the ESMC messages, form ESMC messages to be transmitted；OLT is sent by data channel to ONU
ESMC messages to be transmitted；After ONU receives the ESMC messages to be transmitted of OLT transmissions by data channel, does not send and feed back to OLT
Message directly parses the ESMC messages to be transmitted received, obtains time state information；Alternatively, ONU is logical by data
After road receives the ESMC messages to be transmitted of OLT transmissions, feedback message is sent to OLT by data channel；OLT judges default
Whether the feedback message of ONU transmission is received in period, if OLT is not received by the anti-of ONU transmissions within a preset period of time
Message is presented, then retransmits ESMC messages to be transmitted to ONU；If OLT has received the feedback of ONU transmissions within a preset period of time
Message then judges whether feedback message is the message negotiated, if the feedback message is the message negotiated, OLT determines ONU
ESMC messages to be transmitted are successfully received, ONU parses the ESMC messages to be transmitted received, obtains time state letter
Breath；If the feedback message is not the message negotiated, OLT retransmits ESMC messages to be transmitted to ONU；It realizes in PON
The transmission of time state information is carried out between the OLT and ONU of network, and it is compatible with EPON to realize GPON, makes mobile retransmission
Business is guaranteed.
Example IV
Fig. 7 is the structural schematic diagram of OLT embodiments of the present invention；As shown in fig. 7, passing time provided in an embodiment of the present invention
The OLT07 of status information includes：Sending module 71；Wherein,
The sending module 71, the Ethernet synchronization message channel ESMC to be transmitted for time state information will to be carried
Message is sent to optical network unit ONU by data channel.
Further, the sending module 71 is specifically used for the time state information with the lattice of type lengths values TLV
The data field of ESMC messages is written in formula, and to the organization unique identifier OUI field of the ESMC messages and tissue subtype
The ESMC messages to be transmitted that field is formed after modifying are sent to the ONU by the data channel.
Further, the OLT07 further includes：
Determining module 72, for not receiving the anti-of the ONU transmissions by the data channel within a preset period of time
When presenting message, the ESMC messages to be transmitted are retransmitted to the ONU；
Or, receiving the feedback message and institute that the ONU is sent by the data channel in the preset time period
Feedback message is stated when being not belonging to the message negotiated, the ESMC messages to be transmitted are retransmitted to the ONU.
The OLT of the present embodiment can be used for executing the technical solution of above-mentioned shown embodiment of the method, realization principle and skill
Art effect is similar, and details are not described herein again.
In practical applications, the sending module 71 of the OLT07, determining module 72 can be by the center in OLT07
Processor (Central Processing Unit, CPU), microprocessor (Micro Processor Unit, MPU), number letter
Number processor (Digital Signal Processor, DSP) or field programmable gate array (Field Programmable
Gate Array, FPGA) etc. realizations.
Embodiment five
Fig. 8 is the structural schematic diagram of ONU embodiments of the present invention；As shown in figure 8, passing time provided in an embodiment of the present invention
The ONU08 of status information includes：Receiving module 81, parsing module 82；Wherein,
The receiving module 81 carries time state for what is sent by data channel reception optical line terminal OLT
The Ethernet synchronization message channel ESMC messages to be transmitted of information
The parsing module 82 obtains the time for being parsed to the ESMC messages to be transmitted received
Status information.
Further, the receiving module 81, specifically for receiving the OLT that the OLT is sent by data channel
The time state information is written to the data field of ESMC messages with the format of type lengths values TLV, and the ESMC is reported
The ESMC messages to be transmitted formed after the organization unique identifier OUI field of text and tissue sub-type field modification.
Further, the parsing module 82, specifically for the number to the ESMC messages to be transmitted received
It is extracted according to the TLV format fields in field, obtains the time state information.
Further, the ONU08 further includes：
Sending module 83, for sending feedback message to the OLT by the data channel.
Further, the receiving module 81 is additionally operable to receive the institute that the OLT is sent again by the data channel
State ESMC messages to be transmitted.
The ONU of the present embodiment can be used for executing the technical solution of above-mentioned shown embodiment of the method, realization principle and skill
Art effect is similar, and details are not described herein again.
In practical applications, the receiving module 81 of the ONU08, parsing module 82, sending module 83 can be by being located at
Central processing unit (Central Processing Unit, CPU), microprocessor (Micro Processor in ONU08
Unit, MPU), digital signal processor (Digital Signal Processor, DSP) or field programmable gate array
Realizations such as (Field Programmable Gate Array, FPGA).
Embodiment six
Fig. 9 is the structural schematic diagram of the system embodiment of passing time status information of the present invention；As shown in figure 9, of the invention
The system 09 of passing time status information that embodiment provides includes：OLT91、ONU92；Wherein,
OLT91 is using the OLT as described in above-described embodiment；
ONU92 is using the ONU as described in above-described embodiment.
The system of the passing time status information of the present embodiment can be used for executing the technology of above-mentioned shown embodiment of the method
Scheme, implementing principle and technical effect are similar, and details are not described herein again.
It should be understood by those skilled in the art that, the embodiment of the present invention can be provided as method, system or computer program
Product.Therefore, the shape of hardware embodiment, software implementation or embodiment combining software and hardware aspects can be used in the present invention
Formula.Moreover, the present invention can be used can use storage in the computer that one or more wherein includes computer usable program code
The form for the computer program product implemented on medium (including but not limited to magnetic disk storage and optical memory etc.).
The present invention be with reference to according to the method for the embodiment of the present invention, the flow of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that can be realized by computer program instructions every first-class in flowchart and/or the block diagram
The combination of flow and/or box in journey and/or box and flowchart and/or the block diagram.These computer programs can be provided
Instruct the processor of all-purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine so that the instruction executed by computer or the processor of other programmable data processing devices is generated for real
The device for the function of being specified in present one flow of flow chart or one box of multiple flows and/or block diagram or multiple boxes.
These computer program instructions, which may also be stored in, can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that instruction generation stored in the computer readable memory includes referring to
Enable the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one box of block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device so that count
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, in computer or
The instruction executed on other programmable devices is provided for realizing in one flow of flow chart or multiple flows and/or block diagram one
The step of function of being specified in a box or multiple boxes.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.
Claims (17)
1. a kind of method of passing time status information, which is characterized in that the method includes：
The Ethernet synchronization message channel ESMC messages to be transmitted for carrying time state information are sent to by data channel
Optical network unit ONU.
2. according to the method described in claim 1, it is characterized in that, the ether to be transmitted that time state information will be carried
Net synchronization message channel ESMC messages are sent to optical network unit ONU by data channel, including：
The time state information is written to the data field of ESMC messages with the format of type lengths values TLV, and to described
The ESMC to be transmitted that the organization unique identifier OUI field and tissue sub-type field of ESMC messages are formed after modifying
Message is sent to the ONU by the data channel.
3. method according to claim 1 or 2, which is characterized in that will carry the to be passed of time state information described
After defeated Ethernet synchronization message channel ESMC messages are sent to optical network unit ONU by data channel, the method is also wrapped
It includes：
When not receiving the feedback message that the ONU is sent by the data channel within a preset period of time, to ONU weights
Newly send the ESMC messages to be transmitted；
Or, receiving feedback message that the ONU is sent and described anti-by the data channel in the preset time period
When feedback message is not belonging to the message negotiated, the ESMC messages to be transmitted are retransmitted to the ONU.
4. a kind of method of passing time status information, which is characterized in that the method includes：
It receives the Ethernet to be transmitted for carrying time state information that optical line terminal OLT is sent by data channel and synchronizes and disappear
Cease channel ESMC messages；
The ESMC messages to be transmitted received are parsed, the time state information is obtained.
5. according to the method described in claim 4, it is characterized in that, described receive optical line terminal OLT hair by data channel
That send carries the Ethernet synchronization message channel ESMC messages to be transmitted of time state information, including：
The OLT that the OLT is sent is received by the time state information with the lattice of type lengths values TLV by data channel
The data field of ESMC messages is written in formula, and by the organization unique identifier OUI field of the ESMC messages and organizes subtype
The ESMC messages to be transmitted formed after field modification.
6. according to the method described in claim 4, it is characterized in that, the described pair of ESMC message to be transmitted received carries out
Parsing, obtains the time state information, including：
TLV format fields in the data field of the ESMC messages to be transmitted received are extracted, institute is obtained
State time state information.
7. according to claim 4 to 6 any one of them method, which is characterized in that the method further includes：
By the data channel feedback message is sent to the OLT.
8. the method according to the description of claim 7 is characterized in that the method further includes：
The ESMC messages to be transmitted that the OLT is sent are received again by the data channel.
9. a kind of optical line terminal OLT, which is characterized in that the OLT includes：
Sending module, for the Ethernet synchronization message channel ESMC messages to be transmitted for carrying time state information to be passed through number
It is sent to optical network unit ONU according to channel.
10. OLT according to claim 9, which is characterized in that the sending module is specifically used for the time state
The data field of ESMC messages is written with the format of type lengths values TLV for information, and is uniquely marked to the tissue of the ESMC messages
The ESMC messages to be transmitted known symbol OUI field and formed after organizing sub-type field to modify pass through the data channel
It is sent to the ONU.
11. OLT according to claim 9 or 10, which is characterized in that the OLT further includes：
Determining module, for not receiving the feedback message that the ONU is sent by the data channel within a preset period of time
When, retransmit the ESMC messages to be transmitted to the ONU；
Or, receiving feedback message that the ONU is sent and described anti-by the data channel in the preset time period
When feedback message is not belonging to the message negotiated, the ESMC messages to be transmitted are retransmitted to the ONU.
12. a kind of optical network unit ONU, which is characterized in that the ONU includes：
Receiving module carries the to be passed of time state information for what is sent by data channel reception optical line terminal OLT
Defeated Ethernet synchronization message channel ESMC messages；
Parsing module obtains the time state information for being parsed to the ESMC messages to be transmitted received.
13. ONU according to claim 12, which is characterized in that the receiving module connects specifically for passing through data channel
Receive the number that ESMC messages are written in the time state information by the OLT that the OLT is sent with the format of type lengths values TLV
According to field, and the institute that will be formed after the organization unique identifier OUI field of the ESMC messages and tissue sub-type field modification
State ESMC messages to be transmitted.
14. ONU according to claim 12, which is characterized in that the parsing module, specifically for described in receiving
TLV format fields in the data field of ESMC messages to be transmitted extract, and obtain the time state information.
15. according to claim 12 to 14 any one of them ONU, which is characterized in that the ONU further includes：
Sending module, for sending feedback message to the OLT by the data channel.
16. ONU according to claim 12, which is characterized in that the receiving module is additionally operable to through the data channel
Again the ESMC messages to be transmitted that the OLT is sent are received.
17. a kind of system of passing time status information, which is characterized in that the system comprises such as claim 9 to 11 is any
OLT described in and such as claim 12 to 16 any one of them ONU.
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