CN105264795B

CN105264795B - Orthogonal frequency division multiplexing passive optical network registration activation method, device and system

Info

Publication number: CN105264795B
Application number: CN201380003033.5A
Authority: CN
Inventors: 叶飞
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2013-12-31
Filing date: 2013-12-31
Publication date: 2018-04-20
Anticipated expiration: 2033-12-31
Also published as: CN105264795A; WO2015100651A1

Abstract

A kind of orthogonal frequency division multiplexing passive optical network registration activation method of offer of the embodiment of the present invention, device and system, a kind of orthogonal frequency division multiplexing passive optical network registration activation method, including：Optical line terminal sends downlink training sequence to the optical network unit by certification；Optical line terminal receives the downstream bits carrying table and uplink training sequence for the optical network unit that optical network unit is sent, and the downstream bits carrying table of optical network unit is what optical network unit was calculated according to downlink training sequence；The upstream bits that optical line terminal calculates optical network unit according to uplink training sequence carry table；Optical line terminal is calculated according to the upstream bits of the downstream bits carrying table of optical network unit and optical network unit carrying meter and updates system descending bit carrying table and system uplink bit carrying table and send system descending bit carrying table and system uplink bit carrying table to optical network unit, so that optical network unit renewal system descending bit carrying table and system uplink bit carry table.

Description

Orthogonal frequency division multiplexing passive optical network registration activation method, device and system

Technical field

The present embodiments relate to optical communication field, more particularly to a kind of registration activation of orthogonal frequency division multiplexing passive optical network Methods, devices and systems.

Background technology

Orthogonal Frequency Division Multiplexing（Orthogonal Frequency Division Multiplexing, OFDM）It is that one kind is more Carrier modulation technique, applies it to optical communication field and generates light Orthogonal Frequency Division Multiplexing（Optical Orthogonal Frequency Division Multiplexing, OOFDM）Technology.OFDM-PON is a kind of based on the passive of OOFDM technologies Optical-fiber network（Passive Optical Network, PON）.

OFDM-PON by office side optical line terminal（Optical Line Terminal, OLT）, user side optical-fiber network Unit（Optical Network Unit, ONU）Or ONT Optical Network Terminal（Optical Network Terminal, ONT）With And Optical Distribution Network（Optical Distribution Network, ODN）Composition, usually, ONU and ONT are referred to as ONU。

OFDM-PON mainly has the OFDM-PON of Single wavelength, based on Nai Kuitesi（Nyquist）The OFDM- of multiplexing technology PON, based on wavelength-division multiplex（Wavelength Division Multiplexing, WDM）Multi-wavelength OFDM-PON it is several not The same network architecture.

Due to being had differences in OFDM-PON systems between each subcarrier, different sub-carrier is used between OLT and ONU When transmitting data, the bit bearing value of each subcarrier（The maximum number bits that can be carried）Difference, and current OFDM-PON systems In system, after ONU registers activation in the olt, the bit bearing value of each subcarrier when OLT is not aware that the transmission data between ONU, The link capacity of OFDM-PON systems is caused not to be maximized utilization.

The content of the invention

The embodiment of the present invention provides a kind of orthogonal frequency division multiplexing passive optical network registration activation method, device and system, uses In the link capacity for maximally utilizing OFDM-PON systems.

First aspect provides a kind of orthogonal frequency division multiplexing passive optical network registration activation method, including：

Optical line terminal sends downlink training sequence to the optical network unit by certification；

The optical line terminal receives the downstream bits carrying table for the optical network unit that the optical network unit is sent And uplink training sequence, the downstream bits carrying table of the optical network unit are trained for the optical network unit according to the downlink What sequence calculated；

The upstream bits that the optical line terminal calculates the optical network unit according to the uplink training sequence carry table；

The optical line terminal carries the upper of table and the optical network unit according to the downstream bits of the optical network unit Row bit carrying meter is calculated and updates system descending bit carrying table and system uplink bit carrying table；

The optical line terminal is sent on the system descending bit carrying table and the system to the optical network unit Row bit carries table, so that the optical network unit updates the system descending bit carrying table and the system uplink bit is held Carry table.

In first aspect in the first possible implementation, the optical line terminal is according to the uplink training sequence meter The upstream bits carrying table of the optical network unit is calculated, including：

The optical line terminal calculates each uplink for receiving the uplink training sequence according to the uplink training sequence The signal-to-noise ratio of carrier wave；

The optical line terminal is according to the signal-to-noise ratio computation for each uplink sub-carrier for receiving the uplink training sequence The upstream bits carrying table of optical network unit.

With reference to first aspect or first aspect the first possible implementation, in second of possible implementation, The optical line terminal is held according to the downstream bits carrying table of the optical network unit and the upstream bits of the optical network unit Meter is carried to calculate and update system descending bit carrying table and system uplink bit carrying table, including：

The optical line terminal carries system descending bit carrying table and the downstream bits of the optical network unit The less one bit bearing value as the downlink sub-carrier in the bit bearing value of the identical downlink sub-carrier of table, to update State system descending bit carrying table；

The optical line terminal carries system uplink bit carrying table and the upstream bits of the optical network unit The less one bit bearing value as the uplink sub-carrier in the bit bearing value of the identical uplink sub-carrier of table, to update State system uplink bit carrying table；Or the upstream bits of the optical network unit are carried table and other by the optical line terminal The upstream bits carrying table of optical network unit carries table collectively as the system uplink bit.

Any possible implementation into second of possible implementation of first aspect with reference to first aspect, In three kinds of possible implementations, the optical line terminal sends the system descending bit to the optical network unit and carries table Table is carried with the system uplink bit, so that the optical network unit updates the system descending bit carrying table and the system After upstream bits of uniting carrying table, further include：

The optical line terminal sends the second distance measurement request message to the optical network unit；

The optical line terminal receives the second ranging response message that the optical network unit is sent, to obtain the second ranging As a result.

Any possible implementation in the third possible implementation to first aspect with reference to first aspect, In four kinds of possible implementations, the optical line terminal to by the optical network unit of certification send downlink training sequence it Before, further include：

The optical line terminal carries table using acquiescence downstream bits and sends login request message to the optical network unit；

The optical line terminal is received the optical network unit and is responded using the registration that default upstream bit carrying table is sent Message, the registration reply message include the sequence number of the optical network unit；

The optical line terminal determines optical network unit that the sequence number represents by certification and be the sequence number The optical network unit distribution optical network unit marks of representative；

The optical line terminal sends the optical network unit marks to the optical network unit.

4th kind of possible implementation with reference to first aspect, in the 5th kind of possible implementation, the optical link Terminal determines that the optical network unit that the sequence number represents divides by certification and for the optical network unit of sequence number representative Optical distribution networks unit marks, including：

If the optical line terminal determines that the optical network unit of the sequence number representative is configured and is activated, the light Line terminal determines optical network unit that the sequence number represents by certification and the optical-fiber network list that is represented for the sequence number Member distributes the optical network unit marks.

4th kind of possible implementation with reference to first aspect, in the 6th kind of possible implementation, the optical link Terminal determines that the optical network unit that the sequence number represents divides by certification and for the optical network unit of sequence number representative Optical distribution networks unit marks, including：

If the optical line terminal determines that the optical network unit of the sequence number representative is configured but is not activated, described Optical line terminal sends authentication request message to the optical network unit；

The optical line terminal receives the authentication response message that the optical network unit is sent, in the authentication response message Certification mark and/or certification password including the optical network unit；

If the optical line terminal determines that the sequence number of the optical network unit is identified with the certification of the optical network unit And/or certification password is legal, then the optical line terminal determine optical network unit that the sequence number represents by certification simultaneously The optical network unit marks are distributed for the optical network unit that the sequence number represents.

4th kind of possible implementation with reference to first aspect, in the 7th kind of possible implementation, the optical link Terminal determines that the optical network unit that the sequence number represents divides by certification and for the optical network unit of sequence number representative Optical distribution networks unit marks, including：

It is not activated if the optical line terminal determines that the sequence number of the optical network unit does not configure, the light Road terminal distributes interim optical network unit marks for the optical network unit；

The optical line terminal sends authentication request message to the optical network unit；

If the optical line terminal determines that the sequence number of the optical network unit is identified with the certification of the optical network unit And/or certification password is legal, then the optical line terminal determines that the optical network unit has passed through certification；

The optical line terminal sends lower line to the optical network unit, and discharges the casual network mark；

The optical line terminal resends the login request message to the optical network unit；

The optical line terminal receives the registration reply message that the optical network unit is resend, and is the sequence The optical network unit that row number represents distributes the optical network unit marks.

7th kind of possible implementation with reference to first aspect, in the 8th kind of possible implementation, the optical link Before terminal sends authentication request message to the optical network unit, further include：

The optical line terminal sends the 3rd distance measurement request message to the optical network unit；

The optical line terminal receives the 3rd ranging response message that the optical network unit is sent, to obtain the 3rd ranging As a result.

Any possible implementation in 4th kind to the 8th kind possible implementation with reference to first aspect, the 9th In the possible implementation of kind, the optical line terminal carries table using acquiescence downstream bits and sends note to the optical network unit Volume request message includes：

The optical line terminal is used under acquiescence in the spectral range of acquiescence or all downstream spectrum scopes or management passage Row bit carries table and sends login request message to the optical network unit.

9th kind of possible implementation with reference to first aspect, in the tenth kind of possible implementation, the optical link Before terminal receives the first ranging response message that the optical network unit is sent, further include：

The optical line terminal to the optical network unit send frequency spectrum distribution information so that the optical network unit according to Spectrum operation scope is adjusted to target wave band by the frequency spectrum distribution information by adjusting electric tunable filter.

9th kind of possible implementation with reference to first aspect, in a kind of the tenth possible implementation, the light Before road terminal resends the login request message to the optical network unit, further include：

Any possible implementation in 4th kind to the 8th kind possible implementation with reference to first aspect, the tenth In two kinds of possible implementations, the optical line terminal is sent using acquiescence downstream bits carrying table to the optical network unit Login request message includes：

The optical line terminal uses acquiescence in the initial wavelength or public administration wavelength of all downstream wavelengths or acquiescence Downstream bits carry table and send login request message to the optical network unit；

The optical line terminal is received the optical network unit and is responded using the registration that default upstream bit carrying table is sent Message, including：

The optical line terminal receives the optical network unit by adjusting after light adjustable transmitter in any upstream wavelength Or use default upstream in upstream wavelength corresponding with the downstream wavelength that the reception optical network unit sends login request message The registration reply message that bit carrying table is sent, the registration reply message include the sequence number of the optical network unit.

12nd kind of possible implementation with reference to first aspect, in the 13rd kind of possible implementation, the light Before line terminal receives the first ranging response message that the optical network unit is sent, further include：

The optical line terminal distributes upstream wavelength and downstream wavelength for the optical network unit；

The optical line terminal to the optical network unit send Wavelength Assignment information so that the optical network unit according to The Wavelength Assignment information adjusts the wavelength of the optical network unit optical sender and photoreceiver.

12nd kind of possible implementation with reference to first aspect, in the 14th kind of possible implementation, the light Before line terminal resends the login request message to the optical network unit, further include：

Second aspect provides a kind of orthogonal frequency division multiplexing passive optical network registration activation method, including：

The downlink training sequence of optical line terminal transmission is received by the optical network unit of certification；

The downstream bits that the optical network unit calculates the optical network unit according to the downlink training sequence carry table；

The optical network unit sends the downstream bits carrying table of the optical network unit and upper to the optical line terminal Row training sequence, so that the optical line terminal calculates the upstream bits of the optical network unit according to the uplink training sequence The upstream bits for carrying table and table and the optical network unit being carried according to the downstream bits of the optical network unit carry table Calculate and update system descending bit carrying table and system uplink bit carrying table；

The optical network unit receive and update the system descending bit carrying table that the optical line terminal sends and The system uplink bit carries table.

In second aspect in the first possible implementation, the optical network unit is according to the downlink training sequence meter The downstream bits carrying table of the optical network unit is calculated, including：

The optical network unit calculates each downlink for receiving the downlink training sequence according to the downlink training sequence The signal-to-noise ratio of carrier wave；

The optical network unit is according to the signal-to-noise ratio computation for each downlink sub-carrier for receiving the downlink training sequence The downstream bits carrying table of optical network unit.

With reference to second aspect or second aspect the first possible implementation, in second of possible implementation, The optical network unit receive and update the downstream bits carrying table that the optical line terminal sends and upstream bits carrying table it Afterwards, further include：

The optical network unit receives the second distance measurement request message that the optical line terminal is sent；

The optical network unit sends second of ranging response message to the optical line terminal, so that the optical link is whole End obtains the second distance measurement result.

With reference to second aspect into second of possible implementation of second aspect any possible implementation, In three kinds of possible implementations, the downlink for receiving optical line terminal transmission by the optical network unit of certification trains sequence Before row, further include：

The optical network unit receives the registration request that the optical line terminal is sent using acquiescence downstream bits carrying table Message；

The optical network unit sends registration reply message, the registration reply message using default upstream bit carrying table Include the sequence number of the optical network unit；

The optical network unit receives the optical network unit marks that the optical line terminal is sent, the optical network unit mark Know and determine the optical network unit of the sequence number representative by being that the sequence number represents after certification for the optical line terminal Optical network unit distribution.

The third possible implementation with reference to second aspect, in the 4th kind of possible implementation, the optical-fiber network Unit receives the optical network unit marks that the optical line terminal is sent, and the optical network unit marks are the optical line terminal The optical network unit of the sequence number representative is determined by being that the optical network unit that the sequence number represents distributes after certification, Including：

The optical network unit receives the optical network unit marks that the optical line terminal is sent, the optical network unit mark Know and determine that optical network unit that the sequence number represents is configured for the optical line terminal and be the sequence number after being activated The optical network unit distribution of representative.

The third possible implementation with reference to second aspect, in the 5th kind of possible implementation, the optical-fiber network Unit receives the optical network unit marks that the optical line terminal is sent, and the optical network unit marks are the optical line terminal The optical network unit of the sequence number representative is determined by being that the optical network unit that the sequence number represents distributes after certification, Including：

The optical network unit receives the authentication request message that the optical line terminal is sent, and the authentication request message is What the optical line terminal determined that optical network unit that the sequence number represents is configured but was sent to after not being activated；

The optical network unit sends authentication response message to the optical line terminal, and the authentication response message includes The certification mark and/or certification password of the optical network unit；

The optical network unit receives the optical network unit marks that the optical line terminal is sent, the optical network unit mark Know and determine that the sequence number of the optical network unit is identified and/or recognized with the certification of the optical network unit for the optical line terminal Demonstrate,prove the legal rear optical network unit distribution represented for the sequence number of password.

The third possible implementation with reference to second aspect, in the 6th kind of possible implementation, the optical-fiber network Unit receives the optical network unit marks that the optical line terminal is sent, and the optical network unit marks are the optical line terminal The optical network unit of the sequence number representative is determined by being that the optical network unit that the sequence number represents distributes after certification, Including：

The optical network unit receives the authentication request message that the optical line terminal is sent, in the authentication request message Including interim optical network unit marks, the authentication request message determines the sequence of the optical network unit for the optical line terminal Row number do not configure be not activated after be sent to；

The optical network unit receives the lower line that the optical line terminal is sent, and the lower line is the light The legal rear transmission of certification mark and/or certification password of the sequence number of optical network unit described in the terminal of road and the optical network unit 's；

The optical network unit receives the login request message that the optical line terminal is resend；

The optical network unit resends the registration reply message to the optical line terminal；

The optical network unit receives the optical network unit marks that the optical line terminal is sent.

With reference to the 6th kind of possible implementation of second aspect, in the 7th kind of possible implementation, the optical-fiber network Before unit receives the authentication request message that the optical line terminal is sent, further include：

The optical network unit receives the 3rd distance measurement request message that the optical line terminal is sent；

The optical network unit sends the 3rd ranging response message to the optical line terminal, so that the optical line terminal Obtain the 3rd distance measurement result.

With reference to the third any possible implementation into the 7th kind of possible implementation of second aspect, the 8th In the possible implementation of kind, the optical network unit receives the optical line terminal and uses acquiescence downstream bits carrying table transmission Login request message include：

The optical network unit receive the optical line terminal in the spectral range of acquiescence or all downstream spectrum scopes or The login request message that management passage is sent using acquiescence downstream bits carrying table.

With reference to the 8th kind of possible implementation of second aspect, in the 9th kind of possible implementation, the optical-fiber network Before unit sends the first ranging response message to the optical line terminal, further include：

The optical network unit receives the frequency spectrum distribution information that the optical line terminal is sent；

The optical network unit distributes information by adjusting electric tunable filter by spectrum operation scope according to the frequency spectrum It is adjusted to target wave band.

With reference to the 8th kind of possible implementation of second aspect, in the tenth kind of possible implementation, the optical-fiber network Before unit receives the login request message that the optical line terminal is resend, further include：

With reference to the third any possible implementation into the 7th kind of possible implementation of second aspect, the tenth In a kind of possible implementation, the optical network unit is received the optical line terminal and is sent out using acquiescence downstream bits carrying table The login request message sent includes：

The optical network unit receives the optical line terminal in all downstream wavelengths or the initial wavelength or public of acquiescence The login request message sent in management of wavelengths using acquiescence downstream bits carrying table；

The optical network unit sends registration reply message using default upstream bit carrying table, including：

The optical network unit adjusts light adjustable transmitter, in any upstream wavelength or with receiving the optical network unit In the corresponding upstream wavelength of downstream wavelength for sending login request message, registration response is sent using default upstream bit carrying table Message, the registration reply message include the sequence number of the optical network unit.

With reference to a kind of the tenth possible implementation of second aspect, in the 12nd kind of possible implementation, the light Before network unit sends the first ranging response message to the optical line terminal, further include：

The optical network unit receives the Wavelength Assignment information that the optical line terminal is sent, and the Wavelength Assignment information is The optical line terminal is optical network unit distribution；

The optical network unit adjusts the optical network unit optical sender and light-receiving according to the Wavelength Assignment information The wavelength of machine.

With reference to a kind of the tenth possible implementation of second aspect, in the 13rd kind of possible implementation, the light Before network unit receives the login request message that the optical line terminal is resend, further include：

The third aspect provides a kind of optical line terminal, including：

Sending module, for sending downlink training sequence to the optical network unit by certification；

Receiving module, the downstream bits carrying table of the optical network unit sent for receiving the optical network unit and Uplink training sequence, the downstream bits carrying table of the optical network unit train sequence for the optical network unit according to the downlink Column count；

Computing module, the upstream bits for calculating the optical network unit according to the uplink training sequence carry table；

Update module, for carrying the uplink of table and the optical network unit according to the downstream bits of the optical network unit Bit carrying meter is calculated and updates system descending bit carrying table and system uplink bit carrying table；

The sending module, is additionally operable to send the system descending bit carrying table and the system to the optical network unit Upstream bits of uniting carrying table, so that the optical network unit updates the system descending bit carrying table and system uplink ratio Spy's carrying table.

In the third aspect in the first possible implementation, the computing module, specifically for being instructed according to the uplink Practice the signal-to-noise ratio that sequence calculates each uplink sub-carrier for receiving the uplink training sequence；According to the reception uplink training sequence Each uplink sub-carrier signal-to-noise ratio computation described in optical network unit upstream bits carrying table.

With reference to the third aspect or the third aspect the first possible implementation, in second of possible implementation, The update module, specifically for system descending bit carrying table and the downstream bits of the optical network unit are carried table The less one bit bearing value as the downlink sub-carrier in the bit bearing value of identical downlink sub-carrier, with described in renewal System descending bit carries table；The upstream bits that the system uplink bit is carried to table and the optical network unit carry table phase With the less one bit bearing value as the uplink sub-carrier in the bit bearing value of uplink sub-carrier, to update the system Upstream bits of uniting carrying table；Or the upstream bits of the optical network unit are carried table and other light nets by the optical line terminal The upstream bits carrying table of network unit carries table collectively as the system uplink bit.

With reference to the third aspect into second of possible implementation of the third aspect any possible implementation, In three kinds of possible implementations, the sending module, is additionally operable to send the second distance measurement request message to the optical network unit；

The receiving module, is additionally operable to receive the second ranging response message that the optical network unit is sent, to obtain the Two distance measurement results.

With reference to any possible implementation in the third aspect to the third aspect the third possible implementation, In four kinds of possible implementations, the sending module, is also used for acquiescence downstream bits carrying table to the optical-fiber network list Member sends login request message；

The receiving module, is additionally operable to receive the registration that the optical network unit uses default upstream bit carrying table to send Response message, the registration reply message include the sequence number of the optical network unit；

The optical line terminal further includes：Authentication module, for determining that the optical network unit that the sequence number represents has led to The optical network unit crossed certification and represented for the sequence number distributes optical network unit marks；

The sending module, is additionally operable to send the optical network unit marks to the optical network unit.

With reference to the 4th kind of possible implementation of the third aspect, in the 5th kind of possible implementation, the certification mould Block, specifically for if it is determined that the optical network unit that represents of the sequence number is configured and be activated, it is determined that the sequence number generation The optical network unit of table distributes the optical network unit marks by certification and for the optical network unit of sequence number representative.

With reference to the 4th kind of possible implementation of the third aspect, in the 6th kind of possible implementation, the certification mould Block, specifically for if it is determined that the optical network unit that represents of the sequence number is configured but be not activated, then to the optical-fiber network list Member sends authentication request message；The authentication response message that the optical network unit is sent is received, is wrapped in the authentication response message Include the certification mark and/or certification password of the optical network unit；If it is determined that the sequence number of the optical network unit and the light The certification mark and/or certification password of network unit are legal, it is determined that the optical network unit that the sequence number represents is by recognizing Demonstrate,prove and be that the optical network unit that the sequence number represents distributes the optical network unit marks.

With reference to the 4th kind of possible implementation of the third aspect, in the 7th kind of possible implementation, the certification mould Block, specifically for if it is determined that the sequence number of the optical network unit is not configured and is not activated, being then the optical network unit point With interim optical network unit marks；Authentication request message is sent to the optical network unit；The optical network unit is received to send Authentication response message, the authentication response message includes the certification mark and/or certification password of the optical network unit；If Determine that the sequence number of the optical network unit and the certification mark of the optical network unit and/or certification password are legal, it is determined that The optical network unit has passed through certification；Lower line is sent to the optical network unit, and discharges the casual network mark； The login request message is resend to the optical network unit；Receive the registration that the optical network unit is resend Response message, and the optical network unit represented for the sequence number distributes the optical network unit marks.

With reference to the 7th kind of possible implementation of the third aspect, in the 8th kind of possible implementation, the transmission mould Block, is additionally operable to send the 3rd distance measurement request message to the optical network unit；

The receiving module, is additionally operable to receive the 3rd ranging response message that the optical network unit is sent, to obtain the Three distance measurement results.

With reference to any possible implementation in the 4th kind to the 8th kind possible implementation of the third aspect, the 9th In kind possible implementation, the sending module, specifically in the spectral range of acquiescence or all downstream spectrum scopes or Management passage carries table using acquiescence downstream bits and sends login request message to the optical network unit.

With reference to the 9th kind of possible implementation of the third aspect, in the tenth kind of possible implementation, the optical link Terminal further includes：

Frequency spectrum distribution module, for sending frequency spectrum distribution information to the optical network unit, so that the optical network unit Information is distributed according to the frequency spectrum, and spectrum operation scope is adjusted to target wave band by adjusting electric tunable filter.

With reference to any possible implementation in the 4th kind to the 8th kind possible implementation of the third aspect, the tenth In a kind of possible implementation, the sending module, specifically for the initial wavelength or public affairs in all downstream wavelengths or acquiescence Table is carried using acquiescence downstream bits send login request message to the optical network unit in management of wavelengths altogether；

The receiving module, specifically for receiving the optical network unit by adjusting after light adjustable transmitter on any Using silent in traveling wave length or upstream wavelength corresponding with the downstream wavelength that the reception optical network unit sends login request message Recognize the registration reply message of upstream bits carrying table transmission, the registration reply message includes the sequence of the optical network unit Number.

With reference to a kind of the tenth possible implementation of the third aspect, in the 12nd kind of possible implementation, the light Line terminal further includes：

Wavelength Assignment module, for distributing upstream wavelength and downstream wavelength for the optical network unit；To the optical-fiber network Unit sends Wavelength Assignment information, so that the optical network unit adjusts the optical network unit according to the Wavelength Assignment information The wavelength of optical sender and photoreceiver.

Fourth aspect provides a kind of optical network unit, including：

Receiving module, for receiving the downlink training sequence of optical line terminal transmission；

Computing module, the downstream bits for calculating the optical network unit according to the downlink training sequence carry table；

Sending module, for sending the downstream bits carrying table and uplink of the optical network unit to the optical line terminal Training sequence, so that the upstream bits that the optical line terminal calculates the optical network unit according to the uplink training sequence are held The upstream bits for carrying table and table and the optical network unit being carried according to the downstream bits of the optical network unit carry meter Calculate and update system descending bit carrying table and system uplink bit carrying table；

Update module, for receiving and updating the system descending bit carrying table and the institute that the optical line terminal is sent State system uplink bit carrying table.

In fourth aspect in the first possible implementation, the computing module, specifically for being instructed according to the downlink Practice the signal-to-noise ratio that sequence calculates each downlink sub-carrier for receiving the downlink training sequence；According to the reception downlink training sequence Each downlink sub-carrier signal-to-noise ratio computation described in optical network unit downstream bits carrying table.

With reference to fourth aspect or fourth aspect the first possible implementation, in second of possible implementation, The receiving module, is additionally operable to receive the second distance measurement request message that the optical line terminal is sent；

The sending module, is additionally operable to send second of ranging response message to the optical line terminal, so that the light Line terminal obtains the second distance measurement result.

With reference to fourth aspect into second of possible implementation of fourth aspect any possible implementation, In three kinds of possible implementations, the receiving module, is additionally operable to receive the optical line terminal and is held using acquiescence downstream bits Carry the login request message that table is sent；

The sending module, is also used for default upstream bit carrying table and sends registration reply message, the registration is rung Message is answered to include the sequence number of the optical network unit；

The receiving module, is additionally operable to receive the optical network unit marks that the optical line terminal is sent, the optical-fiber network Unit marks are that the optical line terminal determines the optical network unit of the sequence number representative by being the sequence after certification Number represent optical network unit distribution.

The third possible implementation with reference to fourth aspect, in the 4th kind of possible implementation, the reception mould Block, the optical network unit marks sent specifically for receiving the optical line terminal, the optical network unit marks are the light Line terminal determines that optical network unit that the sequence number represents is configured and after being activated to be light net that the sequence number represents The distribution of network unit.

The third possible implementation with reference to fourth aspect, in the 5th kind of possible implementation, the reception mould Block, the authentication request message sent specifically for receiving the optical line terminal, the authentication request message is the optical link What terminal determined that optical network unit that the sequence number represents is configured but was sent to after not being activated；

The sending module, specifically for sending authentication response message to the optical line terminal, the authentication response disappears Breath includes the certification mark and/or certification password of the optical network unit；

The receiving module, is additionally operable to receive the optical network unit marks that the optical line terminal is sent, the optical-fiber network Unit marks determine that the sequence number of the optical network unit is identified with the certification of the optical network unit for the optical line terminal And/or the legal rear optical network unit distribution represented for the sequence number of certification password.

The third possible implementation with reference to fourth aspect, in the 6th kind of possible implementation, the reception mould Block, the authentication request message sent specifically for receiving the optical line terminal, the authentication request message include interim light Network Element Identifier, the authentication request message determine that the sequence number of the optical network unit does not configure for the optical line terminal It is sent to after not being activated；

The receiving module, is additionally operable to receive the lower line that the optical line terminal is sent, the lower line is institute State the sequence number of optical network unit described in optical line terminal and the certification mark of the optical network unit and/or certification password are legal Send afterwards；Receive the login request message that the optical line terminal is resend；

The sending module, is additionally operable to resend the registration reply message to the optical line terminal；

The receiving module, is additionally operable to receive the optical network unit marks that the optical line terminal is sent.

With reference to the 6th kind of possible implementation of fourth aspect, in the 7th kind of possible implementation, the reception mould Block, is additionally operable to receive the 3rd distance measurement request message that the optical line terminal is sent；

The sending module, is additionally operable to send the 3rd ranging response message to the optical line terminal, so that the light Road terminal obtains the 3rd distance measurement result.

With reference to the third any possible implementation into the 7th kind of possible implementation of fourth aspect, the 8th In kind possible implementation, the receiving module, specifically for receive the optical line terminal in the spectral range of acquiescence or The login request message that all downstream spectrum scopes or management passage are sent using acquiescence downstream bits carrying table.

With reference to the 8th kind of possible implementation of fourth aspect, in the 9th kind of possible implementation, the optical-fiber network Unit further includes：

Frequency spectrum adjustment module, information is distributed for receiving the frequency spectrum that the optical line terminal is sent；According to the frequency spectrum point Spectrum operation scope is adjusted to target wave band by adjusting electric tunable filter with information.

With reference to the third any possible implementation into the 7th kind of possible implementation of fourth aspect, the tenth In the possible implementation of kind, the receiving module, specifically for receiving the optical line terminal in all downstream wavelengths or silent The login request message sent in the initial wavelength or public administration wavelength recognized using acquiescence downstream bits carrying table；

The sending module, specifically for by adjust after light adjustable transmitter any upstream wavelength or with described in reception Optical network unit is sent and is sent out in the corresponding upstream wavelength of downstream wavelength of login request message using default upstream bit carrying table The registration reply message sent, the registration reply message include the sequence number of the optical network unit.

With reference to the tenth kind of possible implementation of fourth aspect, in a kind of the tenth possible implementation, further include：

Wavelength Assignment module, the Wavelength Assignment information sent for receiving the optical line terminal, the Wavelength Assignment letter It is what the optical network unit distributed to cease for the optical line terminal；The optical-fiber network list is adjusted according to the Wavelength Assignment information The wavelength of first optical sender and photoreceiver.

5th aspect provides a kind of orthogonal frequency division multiplexing passive optical network system, including：

The optical line terminal provided such as any possible implementation of the third aspect；

The optical network unit provided such as any possible implementation of fourth aspect；

Optical Distribution Network.

Orthogonal frequency division multiplexing passive optical network registration activation method provided in an embodiment of the present invention, device and system, OLT to Downlink training sequence is sent by the ONU of certification, and receives the downstream bits carrying table and uplink instruction of the ONU of ONU transmissions Practice sequence, so as to calculate the upstream bits carrying table of the ONU, table and uplink ratio are carried using the downstream bits of the ONU Special carrying table renewal system descending bit carrying table and system uplink bit carrying table are simultaneously sent to ONU, can make OLT and ONU Using the system descending bit carrying table after renewal and system uplink bit carrying table transmission data, so that the chain of OFDM-PON Road maximum capacity.

Brief description of the drawings

In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing There is attached drawing needed in technology description to be briefly described, it should be apparent that, drawings in the following description are this hairs Some bright embodiments, for those of ordinary skill in the art, without having to pay creative labor, can be with Other attached drawings are obtained according to these attached drawings.

Fig. 1 is typical Single wavelength OFDM-PON configuration diagrams；

Fig. 2 is the OFDM-PON configuration diagrams based on Nyquist multiplexing technologies；

Fig. 3 is the flow chart of OFDM-PON registration activation methods embodiment one provided in an embodiment of the present invention；

Fig. 4 is the flow chart of OFDM-PON registration activation methods embodiment two provided in an embodiment of the present invention；

Fig. 5 is the flow chart of OFDM-PON registration activation methods embodiment three provided in an embodiment of the present invention；

Fig. 6 is the flow chart of OFDM-PON registration activation methods example IV provided in an embodiment of the present invention；

Fig. 7 is the flow chart of OFDM-PON registration activation methods embodiment five provided in an embodiment of the present invention；

Fig. 8 is the flow chart of OFDM-PON registration activation methods embodiment six provided in an embodiment of the present invention；

Fig. 9 is the flow chart of OFDM-PON registration activation methods embodiment seven provided in an embodiment of the present invention；

Figure 10 is the flow chart of OFDM-PON registration activation methods embodiment eight provided in an embodiment of the present invention；

Figure 11 is the flow chart of OFDM-PON registration activation methods embodiment nine provided in an embodiment of the present invention；

Figure 12 is the flow chart of OFDM-PON registration activation methods embodiment ten provided in an embodiment of the present invention；

Figure 13 is the signaling process figure of OFDM-PON registration activation methods embodiment 11 provided in an embodiment of the present invention；

Figure 14 is the signaling process figure of OFDM-PON registration activation methods embodiment 12 provided in an embodiment of the present invention；

Figure 15 is the signaling process figure of OFDM-PON registration activation methods embodiment 13 provided in an embodiment of the present invention；

Figure 16 is the signaling process figure of OFDM-PON registration activation methods embodiment 14 provided in an embodiment of the present invention；

Figure 17 is the signaling process figure of OFDM-PON registration activation methods embodiment 15 provided in an embodiment of the present invention；

Figure 18 is the signaling process figure of OFDM-PON registration activation methods embodiment 16 provided in an embodiment of the present invention；

Figure 19 is the signaling process figure of OFDM-PON registration activation methods embodiment 17 provided in an embodiment of the present invention；

Figure 20 is the signaling process figure of OFDM-PON registration activation methods embodiment 18 provided in an embodiment of the present invention；

Figure 21 is the signaling process figure of OFDM-PON registration activation methods embodiment 19 provided in an embodiment of the present invention；

Figure 22 is the structure diagram of optical line terminal embodiment one provided in an embodiment of the present invention；

Figure 23 is the structure diagram of optical line terminal embodiment two provided in an embodiment of the present invention；

Figure 24 is the structure diagram of optical line terminal embodiment three provided in an embodiment of the present invention；

Figure 25 is the structure diagram of optical line terminal example IV provided in an embodiment of the present invention；

Figure 26 is the structure diagram of optical network unit embodiment one provided in an embodiment of the present invention；

Figure 27 is the structure diagram of optical network unit embodiment two provided in an embodiment of the present invention；

Figure 28 is the structure diagram of optical network unit embodiment three provided in an embodiment of the present invention；

Figure 29 is the structure diagram of OFDM-PON system embodiments one provided in an embodiment of the present invention.

Embodiment

To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention In attached drawing, the technical solution in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is Part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art All other embodiments obtained without creative efforts, belong to the scope of protection of the invention.

In PON system, OLT provides Network Side Interface, connection one or more ODN for PON system.ONU is PON system User side interface is provided, is connected with ODN.If ONU directly provides User Port Function, such as PC（Personal Computer, PC）The ethernet user port of online, then referred to as ONT.Be mentioned below in the present invention ONU system refer to ONU and ONT.ODN is passive optical splitters part, for connecting OLT device and ONU equipment, for distributing or being multiplexed the number between OLT and ONU It is believed that number.In OFDM-PON systems, down direction is known as from OLT to ONU；Conversely, it is up direction from ONU to OLT.

Fig. 1 is typical Single wavelength OFDM-PON configuration diagrams, as shown in Figure 1, in Single wavelength OFDM-PON systems, Respectively there was only 1 wavelength in uplink and downlink direction.In down direction, medium access control (the Medium Access of OLT110 Control, MAC) layer 111 be used for realization ONU management, Dynamic Bandwidth Allocation（Dynamic Bandwidth Allocation, DBA）, ONU registrations activation, the function such as data transmit-receive；Physical medium is related（Physical Medium Dependent, PMD）Layer 112 are used to modulate data onto the Modulation and Amplitude Modulation that is orthogonal according to the parameter that MAC layer 111 configures（Quadrature Amplitude Modulation, QAM）Form and through inverse fast fourier transform（Inverse Fast Fourier Transformation, IFFT）After conversion, pass through digital-to-analogue conversion（Digital to Analog Converter, DAC）113 convert digital signals into Electric signal；Optical sender（Optical Transmitter, Tx）114 are used to convert the electrical signal to optical signal；Optical signal is through light Fine and passive device, such as optical splitter 120（Optical fiber and passive device composition ODN）It is delivered to ONU130；The light-receiving of ONU130 Machine（Optical Receiver, Rx）131 convert optical signals into electric signal, by analog-to-digital conversion（Analog to Digital Converter, ADC）Analog electrical signal is converted into digital signal by 132, and synchronization, Fast Fourier Transform (FFT) are realized by pmd layer 133 （Fast Fourier Transformation, FFT）, balanced and QAM demodulation, the data recovered are given at MAC layer 134 Reason.In up direction, the MAC layer 134 of ONU130 is used for realization the functions such as ONU management, DBA, data transmit-receive, is specified in DBA Time goes out data sending；Pmd layer 133, the function of DAC135, Tx136 are corresponding to down direction OLT110 in ONU130 The function of module is similar, corresponding module in Rx116, ADC115, the function of pmd layer 112 and down direction ONU130 in OLT110 Function it is similar.Wavelength division multiplexer in OLT110（Wavelength Division Multiplexing, WDM）117 Hes WDM137 in ONU130 is used to enable different optical signals to transmit in optical fiber all the way.In addition, also exist in system Multiple ONU equipments such as ONU140, ONU150, its concrete structure and function are identical with OUN130.

Fig. 2 is the OFDM-PON configuration diagrams based on Nyquist multiplexing technologies, as shown in Fig. 2, based on Nyquist In multiplexing technology OFDM-PON systems, uplink and downlink direction respectively only has 1 wavelength.It is different from Single wavelength OFDM-PON systems It is that there are two DAC in the uplink and downlink direction based on Nyquist multiplexing technologies respectively, is operated in baseband mode and mixing respectively Pattern.DAC in a hybrid mode, radio frequency is exported in second order or three rank Nyquist areas（RadioFrequency, RF）Carrier wave. In down direction, the MAC layer 211 of OLT210 is used for realization the functions such as ONU management, DBA, ONU registration activation, data transmit-receive；PMD Layer 212 is used to modulate data onto into QAM forms and after IFFT is changed according to the parameter that MAC layer 211 configures, by DAC213 and DAC214 converts digital signals into electric signal；Wherein, DAC213 is operated in baseband mode, and data are transformed into the carrier wave of base band On；DAC214 work mixed modes, data are transformed on the carrier wave of radio frequency；Pass through the transformed numbers of DAC213 and DAC214 According in different spectral range or wave band, DAC213 and the transformed data of DAC214 after the merging of electrical multiplexer 215, by Tx216 converts the electrical signal to optical signal；Optical signal is through optical fiber and passive device, such as optical splitter 220（Optical fiber and passive device Form ODN）It is delivered to ONU230；After the Rx231 of ONU230 converts optical signals into electric signal, by electric tunable filter （Tunable Filter, TF）The 232 suitable wave bands of selection, are then converted into digital signal by ADC233 by analog electrical signal, Synchronization, FFT, equilibrium and QAM demodulation are realized by pmd layer 234, the data recovered is given to MAC layer 235 and handles.In uplink side To the MAC layer 235 of ONU230 is used for realization the functions such as ONU management, DBA, data transmit-receive, sends out data in the time that DBA is specified See off；Pmd layer 133 in ONU130 in ONU230 in the function and Fig. 1 of pmd layer 234, DAC layers 236, Tx237, DAC135, The function of Tx136 is similar, Rx116 in the OLT110 in OLT210 in the function and Fig. 1 of Rx217, ADC218, pmd layer 212, ADC115, the function of pmd layer 112 are similar.The WDM238 in WDM219 and ONU230 in OLT210 is used to believe different light Number it can be transmitted in optical fiber all the way.In addition, also there are multiple ONU equipments such as ONU240, ONU250, its specific knot in system Structure and function are identical with OUN230.

In addition, the multi-wavelength OFDM-PON systems based on WDM technology, compared with Single wavelength OFDM-PON systems, difference It is that respectively there is the optical signal of 4 kinds of different wave lengths in downlink and uplink direction.The optical sender of ONU is usually tunable laser, ONU's Photoreceiver is usually to include tunable filter, that is to say, that the optical sender and photoreceiver of ONU can select suitably Operation wavelength.

For above-mentioned several OFDM-PON systems, ofdm signal is to transmit data by multiple subcarriers, single The maximum number bits that subcarrier can carry are known as bit bearing value（Bitloading, or B values）, each subcarrier holds with its bit The mapping table of load value is known as bit carrying table（Bit table, or B tables）.Meanwhile in OFDM-PON, OLT from it is different Transmission range is different between ONU, and the signal-to-noise ratio of link is also different between different ONU and OLT, and the bit carrying table of each ONU also may be used Can be different, therefore to make identical in the bit carrying table that the bit bearing value of each subcarrier in downstream bits carrying table is each ONU Minimum one in the bit bearing value of subcarrier, just can ensure that can ensure that normal data pass between OLT and every ONU It is defeated.The bit carrying table in uplink and downlink direction in OLT is referred to as system uplink bit carrying table and the carrying of system descending bit Table.Manage and safeguard that the system uplink bit carrying table in OLT and system descending bit carrying table can improve OFDM-PON systems The utilization rate of the link capacity of system.

Fig. 3 is the flow chart of OFDM-PON registration activation methods embodiment one provided in an embodiment of the present invention, such as Fig. 3 institutes Show, the method for the present embodiment includes：

Step S301, optical line terminal send downlink training sequence to the optical network unit by certification.

Specifically, a kind of OFDM-PON registration activation methods are present embodiments provided, when the ONU in OFDM-PON systems is needed When adding network, it is necessary first to the certification registered on OLT and pass through OLT.When OLT determines that there are registered in network And after the ONU for passing through certification, downlink training sequence is sent to the ONU, the downlink training sequence is by under between OLT and ONU Row subcarrier is sent, the different bits in each downlink sub-carrier bearing downlink training sequence.

Since OLT also carries table without the downstream bits for obtaining ONU, OLT sends downlink training sequence to ONU can be with Using the downstream bits carrying table of acquiescence, the bit bearing value of each downlink sub-carrier is general in the downstream bits carrying table of acquiescence It is smaller, all ONU is received the downlink training sequence.

Step S302, optical line terminal receive optical network unit send optical network unit downstream bits carrying table and on Row training sequence, the downstream bits carrying table of optical network unit is what optical network unit was calculated according to downlink training sequence.

Specifically, after OLT sends downlink training sequence to ONU, ONU can calculate the ONU according to the downlink training sequence Downstream bits carrying table, the downstream bits carrying table of the ONU reflects the optimal of all downlink sub-carriers of the ONU and OLT Bit bearing value.OLT receives the downstream bits carrying table that ONU is sent, meanwhile, OLT also receives the uplink training sequence of ONU transmissions Row.

It should be noted that OLT receives the uplink training sequence of ONU transmissions to the ONU downlink training sequences sent and OLT It is preset in OLT and ONU, the downlink training sequence and uplink training sequence can be identical sequences or not Same sequence.

Step S303, the upstream bits that optical line terminal calculates optical network unit according to uplink training sequence carry table.

Specifically, after OLT receives the uplink training sequence of ONU transmissions, due to the uplink training sequence, to be that ONU passes through upper What row subcarrier was sent, different bits in each uplink sub-carrier carrying uplink training sequence, OLT can be according to receiving Uplink training sequence can calculate the upstream bits carrying table of the ONU.

Step S304, optical line terminal carry the uplink ratio of table and optical network unit according to the downstream bits of optical network unit Spy's carrying meter is calculated and updates system descending bit carrying table and system uplink bit carrying table.

Specifically, since OFDM-PON is a kind of system of point-to-multipoint, an OLT may be connected and pass with multiple ONU Transmission of data, and the bit bearing value for sending data to different ONU by identical subcarrier may be different, in order to ensure with Every ONU of OLT connections can normal transceiving data, and in order to make link transmission capacity between OLT and ONU maximum, Preserve in the olt and maintenance system downstream bits carrying table and system uplink bit carry table.System descending bit carries table table Show bit bearing value of all downlink sub-carriers of the OLT when sending data, be the ONU downstream bits carrying tables of all ONU Minimum value in the bit bearing value of middle same sub-carrier, it is ensured that every ONU can receive the data of OLT transmissions. System uplink bit carrying table represents bit bearing value of all uplink sub-carriers of all ONU when sending data, is all Minimum value in the ONU upstream bits carrying table of ONU in the bit bearing value of same sub-carrier, it is ensured that enable OLT to connect Receive the data that all ONU are sent.OLT receives the downstream bits carrying table of ONU transmissions and calculates upstream bits carrying table Afterwards, system descending bit carrying table is updated according to the downstream bits carrying table of the ONU and upstream bits carrying table respectively and is Upstream bits of uniting carrying table.It is to make this that OLT, which updates system descending bit carrying table and the purpose of system uplink bit carrying table, All ONU of OLT connections can be used and passed between the system descending bit carrying table and system uplink bit carrying table and OLT Transmission of data.

Step S305, optical line terminal sends system descending bit carrying table to optical network unit and system uplink bit is held Table is carried, so that optical network unit renewal system descending bit carrying table and system uplink bit carrying table.

Specifically, OLT updated system descending bit carrying table and system uplink bit carrying table after, it is necessary to will renewal after System descending bit carrying table and system uplink bit carrying table send to ONU, make ONU also preserve update the system descending ratio Spy's carrying table and system uplink bit carrying table, so that ONU can also use system descending bit carrying table and system uplink Data are transmitted between information and OLT in bit carrying table.In this way, OLT and ONU can use the system descending ratio after renewal Spy's carrying table and system uplink bit carrying table transmission data, due to the system descending bit carrying table and system uplink after renewal Bit carrying table represents the optimum bit bearing value of all subcarriers of OLT, therefore OLT and ONU is used under the system after renewal Row bit carrying table and system uplink bit carrying table transmission data can maximize the link capacity of OFDM-PON.

The present embodiment, OLT send downlink training sequence to the ONU by certification, and receive the ONU of ONU transmissions Downstream bits carry table and uplink training sequence, so as to calculate the upstream bits carrying table of the ONU, use the ONU's Downstream bits carry table and upstream bits carrying table renewal system descending bit carrying table and system uplink bit carrying table is concurrent ONU is given, OLT and ONU can be made to be transmitted using the system descending bit carrying table after renewal and system uplink bit carrying table Data, so that the link capacity of OFDM-PON maximizes.

It should be noted that in OFDM-PON systems, between OLT and ONU normal transmission data, OLT need to measure with The distance between ONU, the present embodiment will update and the mistake of maintenance system downstream bits carrying table and system uplink bit carrying table Journey is attached in ranging process, without carrying table and the carrying of system uplink bit for renewal and maintenance system downstream bits Table distributes new signaling process, so as to save system resource.When the ONU in OFDM-PON systems needs to add network, first Need the certification registered on OLT and pass through OLT.When OLT determines that there are ONU that is registered and passing through certification in network Afterwards, the first distance measurement request message is sent to the ONU, downlink training sequence is also sent while the first distance measurement request message is sent Row.After OLT sends the first distance measurement request message to ONU, ONU can be according to the downlink training sequence in the first distance measurement request message The downstream bits carrying table of the ONU is calculated, the downstream bits carrying table of the ONU reflects all downlinks of the ONU and OLT The optimum bit bearing value of carrier wave.Then, OLT can receive the first ranging response message of ONU transmissions, OLT is obtained first Distance measurement result, while also receive the downstream bits carrying table and uplink training sequence of ONU.Further OLT can complete to count Calculate and update system uplink carrying table and the process of system descending carrying table.

In the flow that OLT and OUN carries out ranging, it is added into calculating and renewal system descending bit carrying table and system Row bit carries the flow of table, the link capacity of OFDM-PON maximumlly at the same time, has further been saved system resource.

Further, in embodiment illustrated in fig. 3, optical line terminal calculates the upper of optical network unit according to uplink training sequence Row bit carries table, including：Optical line terminal calculates each uplink son load for receiving uplink training sequence according to uplink training sequence The signal-to-noise ratio of ripple；Optical line terminal according to receive uplink training sequence each uplink sub-carrier signal-to-noise ratio computation optical network unit Upstream bits carrying table.

Specifically, OLT calculates the upstream bits carrying table for the ONU for sending the uplink training sequence according to uplink training sequence Can be according to the signal-to-noise ratio for each uplink sub-carrier for receiving the uplink training sequence（Signal Noise Ratio, SNR）Carry out Calculate.OLT can obtain each uplink sub-carrier when receiving the uplink training sequence that ONU is sent by each uplink sub-carrier SNR, the bit bearing value that each uplink sub-carrier can carry can be calculated according to the SNR of each uplink sub-carrier, be on each The upstream bits bearing value of row subcarrier.OLT brings together the upstream bits bearing value of each uplink sub-carrier as the ONU Upstream bits carrying table.

Further, in embodiment illustrated in fig. 3, optical line terminal carries table and light according to the downstream bits of optical network unit The upstream bits carrying meter of network unit is calculated and updates system descending bit carrying table and system uplink bit carrying table, wraps Include：Downstream bits are carried table downlink sub-carrier identical with the downstream bits carrying table of the optical network unit by optical line terminal The less one bit bearing value as the downlink sub-carrier in bit bearing value, to update system descending bit carrying table； System uplink bit is carried the ratio of table uplink sub-carrier identical with the upstream bits carrying table of optical network unit by optical line terminal The less one bit bearing value as the uplink sub-carrier in special bearing value, to update system uplink bit carrying table；Or Person's optical line terminal is common by the upstream bits carrying table of optical network unit and the upstream bits carrying table of other optical network units Table is carried as system uplink bit.The calculating update method of system uplink carrying bit table is divided into two kinds, wherein the first side In method, system uplink bit is carried table uplink sub-carrier identical with the upstream bits carrying table of optical network unit by optical line terminal Bit bearing value in the less one bit bearing value as the uplink sub-carrier, then after renewal system uplink carrying Table can be used to send upstream data by all optical network units in system；In second method, optical line terminal is by light net The upstream bits carrying table of network unit is held with the upstream bits carrying table of other optical network units collectively as system uplink bit Carry table, then each optical network unit still sends upstream data, and optical line terminal using respective upstream bits carrying table The upper of different optical network units transmissions is then received according to the upstream bits carrying table of the different optical network units of BWMAP information switching Row data.In above-mentioned first method, bandwidth usage performance is more compromised, but complexity is relatively low；And in second method, bandwidth Utility highest, but complexity is higher.

Fig. 4 is the flow chart of OFDM-PON registration activation methods embodiment two provided in an embodiment of the present invention, such as Fig. 4 institutes Show, the method for the present embodiment includes：

Step S401, optical line terminal send the first distance measurement request message and downlink to the optical network unit by certification Training sequence.

Step S402, optical line terminal receive first ranging response message and optical network unit that optical network unit is sent Downstream bits carry table and uplink training sequence, to obtain the first distance measurement result.

Step S403, the upstream bits that optical line terminal calculates optical network unit according to uplink training sequence carry table.

Step S404, optical line terminal carry the uplink ratio of table and optical network unit according to the downstream bits of optical network unit Spy's carrying meter is calculated and updates system descending bit carrying table and system uplink bit carrying table.

Step S405, optical line terminal sends system descending bit carrying table to optical network unit and system uplink bit is held Table is carried, so that optical network unit renewal system descending bit carrying table and system uplink bit carrying table.

Step S406, optical line terminal send the second distance measurement request message to optical network unit.

Specifically, when sending the first distance measurement request message to ONU in step S501 due to OLT, OLT should also without acquisition The downstream bits carrying table of ONU, and ONU does not obtain the upstream bits of the ONU yet during OLT the first ranging response messages of reception Carry table.Therefore when OLT obtains the first distance measurement result, OLT and ONU do not know the bit of mutual uplink and downlink subcarrier Bearing value, so the first distance measurement result is not necessarily accurate.Therefore OLT and ONU all have updated system descending bit carrying table and After system uplink bit carrying table, OLT sends the second distance measurement request message to ONU, carries out the second ranging flow.

Step S407, optical line terminal receive the second ranging response message that optical network unit is sent, and are surveyed with obtaining second Away from result.

Specifically, OLT receives the second ranging response message that ONU is sent, so as to obtain the second distance measurement result.OLT is obtained The second distance measurement result obtained after it have updated system descending bit carrying table and system uplink bit carrying table, therefore Two distance measurement results are more accurate than the first distance measurement result, and OLT transmits the performance of data more preferably using the second distance measurement result and ONU.

The present embodiment, in the flow that OLT and OUN carries out ranging, is added into calculating and the bit carrying of renewal system descending The flow of table and system uplink bit carrying table, and have updated system descending bit carrying table and the carrying of system uplink bit After table, the second ranging flow is carried out, the link capacity of OFDM-PON maximumlly at the same time, has further been saved system money Source, while improve system performance.

Fig. 5 be OFDM-PON registration activation methods embodiment three provided in an embodiment of the present invention flow chart, the present embodiment The process registered in the olt for ONU, as shown in figure 5, the method for the present embodiment includes：

Step S501, optical line terminal send registration request to optical network unit using acquiescence downstream bits carrying table and disappear Breath.

Specifically, when OLT determines the ONU of registration in need in network, login request message is sent to the ONU, due to The ONU is unregistered, and OLT does not know the bit carrying table of the ONU, can not ensure that OLT and ONU are led to by the bit carrying table of OLT Letter.So OLT carries table using acquiescence downstream bits sends login request message to ONU.Give tacit consent to downstream bits carrying table and write from memory Recognize upstream bits carrying table and all use relatively low bit bearing value on each subcarrier, to ensure that all ONU are provided in standard Network in can be with OLT normal communications.

Step S502, optical line terminal are received optical network unit and are responded using the registration that default upstream bit carrying table is sent Message, registration reply message include the sequence number of optical network unit.

Specifically, table is carried also without the downstream bits carrying table after renewal and upstream bits in unregistered ONU, because This, OLT receives the registration reply message that ONU uses default upstream bit carrying table to send.Each ONU has one uniquely Sequence number（Serial Number, SN）, for making OLT distinguish each ONU, the registration reply message that OLT is received includes this The sequence number of ONU.

Step S503, optical line terminal determine optical network unit that the sequence number represents by certification and be the sequence number The optical network unit distribution optical network unit marks of representative.

Specifically, after OLT receives the sequence number of ONU transmissions, judge that the ONU that the sequence number represents is according to the sequence number It is no configured in the olt.If the OLT determines that the ONU that the sequence number represents is configured, distributed for the ONU that the sequence number represents Optical network unit marks（Optical Network Unit Identifier, ONU-ID）.ONU-ID is that OLT is what ONU was distributed Network identity.

The first authentication method：After OLT receives the sequence number of ONU transmissions, the sequence number of the ONU is determined in the olt After configured, it is also necessary to determine whether the ONU has been activated.If OLT determines that the ONU is configured and is activated, OLT determines this The ONU that sequence number represents distributes ONU-ID by certification and for the ONU, does not otherwise distribute ONU-ID.

Second of authentication method：OTL first sends authentication request message to ONU；Then OLT receives the certification that ONU is sent Response message, the authentication response message include the certification mark of ONU（Registration_ID）And/or certification password （password）；If OLT determines that the sequence number of ONU and the certification mark of ONU and/or certification password are legal, OLT determines the sequence The ONU that row number represents distributes optical network unit marks by certification and for the ONU of sequence number representative.If OLT determines ONU's The certification mark and/or certification password of sequence number and ONU are illegal, then refuse ONU and terminated by certification, register flow path.

The third authentication method：After OLT receives the sequence number of ONU transmissions, first interim ONU-ID is distributed for the ONU； Then OLT sends authentication request message to ONU；Then OLT receives the authentication response message that ONU is sent, the authentication response message Include the certification mark and/or certification password of ONU；If OLT determines sequence number and the certification mark of ONU and/or the certification of ONU Password is legal, then OLT determines that ONU has passed through certification；Following OLT sends lower line to ONU, and discharges interim ONU-ID； Then OLT resends login request message to ONU；Last OLT receives the registration reply message that ONU is resend, this is again The registration reply message of transmission includes the sequence number of ONU, and the ONU represented for the sequence number distributes formal ONU-ID.

Step S504, optical line terminal send the optical network unit marks to optical network unit.

Specifically, OLT needs that the ONU will be sent to for the OUN-ID that ONU is distributed.

The present embodiment is the process that ONU is registered in the olt, registers in ONU and could be started by certification, OLT in the olt Calculate and update system descending bit carrying table and the process of system uplink bit carrying table.

Fig. 2 only accounts for the situation of the OFDM-PON systems of Single wavelength into embodiment illustrated in fig. 5, for based on For the OFDM-PON systems of Nyquist multiplexing technologies and multi-wavelength OFDM-PON systems based on WDM technology, it registers activation Method difference.

Fig. 6 be OFDM-PON registration activation methods example IV provided in an embodiment of the present invention flow chart, the present embodiment It is the registration activation method of the OFDM-PON systems based on Nyquist multiplexing technologies, as shown in fig. 6, the method bag of the present embodiment Include：

Step S601, optical line terminal use silent in the spectral range of acquiescence or all downstream spectrum scopes or management passage Recognize downstream bits carrying table and send login request message to optical network unit.

Step S602, optical line terminal are received optical network unit and are responded using the registration that default upstream bit carrying table is sent Message, the registration reply message include the sequence number of optical network unit.

Step S603, optical line terminal determine optical network unit that the sequence number represents by certification and be the sequence number The optical network unit distribution optical network unit marks of representative.

Step S604, optical line terminal send the optical network unit marks to optical network unit.

Step S605, optical line terminal send the first distance measurement request message and downlink to the optical network unit by certification Training sequence.

Step S606, optical line terminal sends frequency spectrum distribution information to optical network unit, so that optical network unit is according to frequency Spectrum operation scope is adjusted to target wave band by spectrum distribution information by adjusting electric tunable filter.

Step S607, optical line terminal receive first ranging response message and optical network unit that optical network unit is sent Downstream bits carry table and uplink training sequence, to obtain the first distance measurement result.

Step S608, the upstream bits that optical line terminal calculates optical network unit according to uplink training sequence carry table.

Step S609, optical line terminal carry the uplink ratio of table and optical network unit according to the downstream bits of optical network unit Spy's carrying meter is calculated and updates downstream bits carrying table and upstream bits carrying table.

Step S610, optical line terminal sends downstream bits carrying table to optical network unit and upstream bits carry table, with Make optical network unit renewal downstream bits carrying table and upstream bits carrying table.

Step S611, optical line terminal send the second distance measurement request message to optical network unit.

Step S612, optical line terminal receive the second ranging response message that optical network unit is sent, and are surveyed with obtaining second Away from result.

The specific method of the present embodiment is similar with the OFDM-PON system embodiments of Single wavelength, and details are not described herein again.

In addition, in embodiment illustrated in fig. 6, step S606 is after OLT receives the sequence number that ONU is sent, to determine the sequence Carried out after number ONU represented is configured in the olt.After if OLT receives the sequence number of ONU transmissions, sequence number generation is determined The ONU of table is not configured in the olt not to be activated, then does not have a step S606, but with step S503 classes in embodiment illustrated in fig. 5 Seemingly, before optical line terminal resends login request message to optical network unit, further include：Optical line terminal is to optical-fiber network Unit sends frequency spectrum distribution information, so that the optical network unit will by adjusting electric tunable filter according to frequency spectrum distribution information Spectrum operation scope is adjusted to target wave band.

Fig. 7 be OFDM-PON registration activation methods embodiment five provided in an embodiment of the present invention flow chart, the present embodiment It is the registration activation method of the multi-wavelength OFDM-PON systems based on WDM technology, as shown in fig. 7, the method for the present embodiment includes：

Step S701, optical line terminal use in the initial wavelength or public administration wavelength of all downstream wavelengths or acquiescence Give tacit consent to downstream bits and carry table to optical network unit transmission login request message.

Step S702, optical line terminal receive optical network unit by adjusting after light adjustable transmitter in any upstream wavelength Or use default upstream bit in upstream wavelength corresponding with the downstream wavelength that reception optical network unit sends login request message The registration reply message that table is sent is carried, which includes the sequence number of optical network unit.

Specifically, when the uplink and downlink wavelength of OFDM-PON systems is unbound, optical line terminal receives optical network unit and leads to Overregulate the registration reply message sent after light adjustable transmitter in any upstream wavelength using default upstream bit carrying table； When the uplink and downlink wavelength binding of OFDM-PON systems, optical line terminal receives optical network unit by adjusting light adjustable transmitter Afterwards default upstream ratio is used in upstream wavelength corresponding with the downstream wavelength of reception optical network unit transmission login request message The registration reply message that spy's carrying table is sent.

Step S703, optical line terminal determine optical network unit that the sequence number represents by certification and be the sequence number The optical network unit distribution optical network unit marks of representative.

Step S704, optical line terminal send the optical network unit marks to optical network unit.

Step S705, optical line terminal send the first distance measurement request message and downlink to the optical network unit by certification Training sequence.

Step S706, optical line terminal distribute upstream wavelength and downstream wavelength for optical network unit.

Step S707, optical line terminal sends Wavelength Assignment information to optical network unit, so that optical network unit is according to ripple The wavelength of long distribution information adjustment optical network unit optical sender and photoreceiver.

Step S708, optical line terminal receive the first ranging response message and the downstream bits carrying that optical network unit is sent Table and uplink training sequence, to obtain the first distance measurement result.

Step S709, the upstream bits that optical line terminal calculates optical network unit according to uplink training sequence carry table.

Step S710, optical line terminal carry the uplink ratio of table and optical network unit according to the downstream bits of optical network unit Spy's carrying meter is calculated and updates downstream bits carrying table and upstream bits carrying table.

Step S711, optical line terminal sends downstream bits carrying table to optical network unit and upstream bits carry table, with Make optical network unit renewal downstream bits carrying table and upstream bits carrying table.

Step S712, optical line terminal send the second distance measurement request message to optical network unit.

Step S713, optical line terminal receive the second ranging response message that optical network unit is sent, and are surveyed with obtaining second Away from result.

In addition, in embodiment illustrated in fig. 7, after step S706 and step S707 are the sequence number that OLT receives ONU transmissions, Determine what is carried out after ONU that the sequence number represents is configured in the olt.After if OLT receives the sequence number of ONU transmissions, determine The ONU that the sequence number represents is not configured is not activated in the olt, then without step S706 and step S707, but with Fig. 5 institutes Show that step S503 is similar in embodiment, before OLT resends login request message to ONU, further includes：Optical line terminal is Optical network unit distributes upstream wavelength and downstream wavelength；Optical line terminal sends Wavelength Assignment information to optical network unit, so that Optical network unit adjusts the wavelength of optical network unit optical sender and photoreceiver according to the Wavelength Assignment information.

Fig. 8 is the flow chart of OFDM-PON registration activation methods embodiment six provided in an embodiment of the present invention, such as Fig. 8 institutes Show, the method for the present embodiment includes：

Step S801, receives the downlink training sequence of optical line terminal transmission by the optical network unit of certification.

Specifically, a kind of OFDM-PON registration activation methods are present embodiments provided, when the ONU in OFDM-PON systems is needed When adding network, it is necessary first to the certification registered on OLT and pass through OLT.When OLT determines that there are registered in network And after the ONU for passing through certification, ONU receives the downlink training sequence that OLT is sent, which passes through between OLT and ONU Downlink sub-carrier send, the different bits in each downlink sub-carrier bearing downlink training sequence.

Since ONU is also without obtaining system descending bit carrying table, OLT sends downlink training sequence to ONU can be with Using the downstream bits carrying table of acquiescence, the bit bearing value of each downlink sub-carrier is general in the downstream bits carrying table of acquiescence It is smaller, all ONU is received the downlink training sequence.

Step S802, the downstream bits that optical network unit calculates optical network unit according to downlink training sequence carry table.

Specifically, after ONU receives the downlink training sequence of OLT transmissions, since the downlink training sequence is OLT under What row subcarrier was sent, therefore there may be difference by downlink training sequence that different sub-carrier is sent by the OLT that receive of ONU Different, ONU can calculate the downstream bits carrying table of the ONU according to the downlink training sequence received.

Step S803, optical network unit sends the downstream bits carrying table of optical network unit to optical line terminal and uplink is instructed Practice sequence, so that optical line terminal calculates the upstream bits carrying table of optical network unit and according to light according to uplink training sequence The downstream bits carrying table of network unit and the upstream bits carrying meter of optical network unit are calculated and update system descending bit and hold Carry table and system uplink bit carrying table.

Specifically, ONU sends downstream bits carrying table and uplink training sequence after calculating to OLT, due to OFDM-PON A kind of system of point-to-multipoint, an OLT may be connected with multiple ONU and transmit data, and by identical subcarrier to The bit bearing value that different ONU sends data may be different, in order to ensure the every ONU being connected with OLT can be received normally Data are sent out, and in order to make the link transmission capacity between OLT and ONU maximum, preserve simultaneously maintenance system downstream bits in the olt Carry table and system uplink bit carrying table.System descending bit carrying table represents that all downlink sub-carriers of the OLT are being sent Bit bearing value during data, be all ONU ONU downstream bits carrying tables in same sub-carrier bit bearing value in most Small value, it is ensured that every ONU can receive the data of OLT transmissions.System uplink bit carrying table represents all ONU's Bit bearing value of all uplink sub-carriers when sending data, be all ONU ONU upstream bits carrying tables in identical sub- load Minimum value in the bit bearing value of ripple, it is ensured that enable OLT to receive the data that all ONU are sent.OLT is received Downstream bits carrying table that ONU is sent and after calculating upstream bits carrying table, according to the downstream bits of the ONU carry table and Upstream bits carrying table updates system descending bit carrying table and system uplink bit carrying table respectively.OLT updates system descending Bit carrying table is that all ONU that connect the OLT can use the system with the purpose of system uplink bit carrying table Data are transmitted between downstream bits carrying table and system uplink bit carrying table and OLT.

Step S804, optical network unit receive and update the system descending bit carrying table and system of optical line terminal transmission Upstream bits carry table.

Specifically, after OLT has updated system descending bit carrying table and system uplink bit carrying table, ONU receives OLT hairs System descending bit carrying table and system uplink bit carrying table after the renewal sent are sent to ONU, and ONU is also preserved renewal should System descending bit carries table and system uplink bit carrying table, so that ONU can also use system descending bit carrying table Data are transmitted between information in system uplink bit carrying table and OLT.In this way, after OLT and ONU can use renewal System descending bit carries table and system uplink bit carrying table transmission data, since the system descending bit after renewal carries table The optimum bit bearing value of all subcarriers of OLT is represented with system uplink bit carrying table, therefore OLT and ONU uses renewal System descending bit carrying table and system uplink bit carrying table transmission data afterwards can make the link capacity of OFDM-PON most Bigization.

It should be noted that in OFDM-PON systems, between OLT and ONU normal transmission data, OLT need to measure with The distance between ONU, the present embodiment will update and the mistake of maintenance system downstream bits carrying table and system uplink bit carrying table Journey is attached in ranging process, without carrying table and the carrying of system uplink bit for renewal and maintenance system downstream bits Table distributes new signaling process, so as to save system resource.When the ONU in OFDM-PON systems needs to add network, first Need the certification registered on OLT and pass through OLT.When OLT determines that there are ONU that is registered and passing through certification in network Afterwards, which receives the first distance measurement request message that OLT is sent, under ONU is also received while the first distance measurement request message is received Row training sequence.After ONU receives the first distance measurement request message that OLT is sent, ONU can be according in the first distance measurement request message Downlink training sequence calculates the downstream bits carrying table of the ONU, and the downstream bits carrying table of the ONU reflects the ONU and OLT All downlink sub-carriers bit bearing value.Then, ONU can send the first ranging response message to OLT, OLT is obtained the One distance measurement result, while ONU also sends the downstream bits carrying table and uplink training sequence of the ONU to OLT.Further OLT The process of system uplink carrying table and system descending carrying table can be completed to calculate and update.

Further, in embodiment illustrated in fig. 8, optical network unit is calculated under optical network unit according to downlink training sequence Row bit carries table, including：Optical network unit calculates each downlink son load for receiving downlink training sequence according to downlink training sequence The signal-to-noise ratio of ripple；Optical network unit according to receive downlink training sequence each downlink sub-carrier signal-to-noise ratio computation optical network unit Downstream bits carrying table.

Specifically, ONU according to downlink training sequence calculate the ONU downstream bits carrying table can according to receive the downlink The SNR of each downlink sub-carrier of training sequence is calculated.ONU is instructed in the reception OLT downlinks sent by each downlink sub-carrier When practicing sequence, the SNR of each downlink sub-carrier can be obtained, can calculate each downlink according to the SNR of each downlink sub-carrier carries The bit bearing value that wave energy enough carries, is the downstream bits bearing value of each downlink sub-carrier.ONU is by under each downlink sub-carrier Row bit bearing value brings together the downstream bits carrying table as the ONU.

Fig. 9 is the flow chart of OFDM-PON registration activation methods embodiment seven provided in an embodiment of the present invention, such as Fig. 9 institutes Show, the method for the present embodiment includes：

Step S901, by the optical network unit of certification receive the first ranging request information that optical line terminal sends and Downlink training sequence.

Step S902, optical network unit send the downlink of the first ranging response message and optical network unit to optical line terminal Bit carries table and uplink training sequence, so that optical line terminal obtains the first distance measurement result.

Step S903, optical network unit sends the downstream bits carrying table of optical network unit to optical line terminal and uplink is instructed Practice sequence, so that optical line terminal calculates the upstream bits carrying table of optical network unit and according to light according to uplink training sequence The downstream bits carrying table of network unit and the upstream bits carrying meter of optical network unit are calculated and update system descending bit and hold Carry table and system uplink bit carrying table.

Step S904, optical network unit receive and update the system descending bit carrying table and system of optical line terminal transmission Upstream bits carry table.

Step S905, optical network unit receive the second distance measurement request message that optical line terminal is sent.

When specifically, due to receiving the first distance measurement request message that OLT is sent to ONU in step S1101, OLT does not have also The downstream bits carrying table of the ONU is obtained, and ONU also should without acquisition to ONU during OLT the first ranging response messages of transmission The upstream bits carrying table of ONU.Therefore when OLT obtains the first distance measurement result, OLT and ONU do not know mutual uplink with The bit bearing value of row subcarrier, so the first distance measurement result is not necessarily accurate.Therefore all have updated under system in OLT and ONU After row bit carries table and system uplink bit carrying table, ONU can receive the second distance measurement request message of OLT transmissions, carry out Second ranging flow.

Step S906, optical network unit sends second of ranging response message to optical line terminal, so that optical line terminal Obtain the second distance measurement result.

Specifically, ONU sends the second ranging response message to OLT, so that OLT obtains the second distance measurement result.OLT is obtained The second distance measurement result obtained after it have updated system descending bit carrying table and system uplink bit carrying table, therefore Two distance measurement results are more accurate than the first distance measurement result, and OLT transmits the performance of data more preferably using the second distance measurement result and ONU.

Figure 10 be OFDM-PON registration activation methods embodiment eight provided in an embodiment of the present invention flow chart, the present embodiment The process registered in the olt for ONU, as shown in Figure 10, the method for the present embodiment include：

Step S1001, optical network unit receives optical line terminal please using the registration that acquiescence downstream bits carrying table is sent Seek message.

Specifically, when OLT determines the ONU of registration in need in network, the registration request that ONU receives OLT transmissions disappears Breath, since the ONU is unregistered, does not know the bit carrying table of the ONU, can not ensure the bit of OLT and ONU by OLT Carry table communication.So ONU receives the login request message that OLT is sent using acquiescence downstream bits carrying table.Give tacit consent to downlink Bit carries table and default upstream bit carrying table all uses relatively low bit bearing value on each subcarrier, all to ensure ONU can be with OLT normal communications in network as defined in standard.

Step S1002, optical network unit send registration reply message, registration response using default upstream bit carrying table Message includes the sequence number of optical network unit.

Specifically, table is carried also without the downstream bits carrying table after renewal and upstream bits in unregistered ONU, because This, ONU carries table using default upstream bit and sends registration reply message to OLT, and default upstream bit carries the bit in table Bearing value is smaller.Each ONU has a unique sequence number（Serial Number, SN）, it is each for distinguishing OLT The registration reply message that ONU, ONU are sent includes the sequence number of the ONU.

Step S1003, optical network unit receive the optical network unit marks that optical line terminal is sent, the optical network unit mark Know for optical line terminal determine the sequence number represent optical network unit by be after certification the sequence number represent optical-fiber network Unit distribution.

Specifically, after OLT receives the sequence number of ONU transmissions, judge that the ONU that the sequence number represents is according to the sequence number It is no configured in the olt.If the OLT determines that the ONU that the sequence number represents is configured, distributed for the ONU that the sequence number represents ONU-ID.ONU-ID is the network identity that OLT is ONU distribution.ONU receives the OUN-ID that OLT is sent.

Second of authentication method：If OLT determines that the ONU of sequence number representative is configured but is not activated, OLT needs ONU is authenticated.ONU first receives the authentication request message that OLT is sent；Then ONU sends authentication response message to OLT, should Authentication response message includes the certification mark and/or certification password of ONU；If OLT determines the certification of the sequence number and ONU of ONU Mark and/or certification password are legal, then OLT determines what the ONU of sequence number representative had been represented by certification and for the sequence number ONU distributes optical network unit marks, and ONU receives the ONU-ID that OLT is sent.If OLT determines the certification of the sequence number and ONU of ONU Mark and/or certification password are illegal, then refuse ONU and terminated by certification, register flow path.

The third authentication method：After OLT receives the sequence number of ONU transmissions, determine that the ONU that the sequence number represents exists Do not configure in OLT and be not activated, then ONU receives the authentication request message that OLT is sent, which includes OLT Interim ONU-ID is distributed for the ONU；Then ONU sends authentication response message to OLT, which includes ONU's Certification mark and/or certification password；If OLT determines that the sequence number of ONU and the certification mark of ONU and/or certification password are legal, OLT determines that ONU has passed through certification；Following ONU receives the lower line that OLT is sent；Then ONU receives what OLT was resend Login request message；ONU resends registration reply message to OLT, which includes ONU's Sequence number；Last ONU receives the formal ONU-ID that OLT is sent.

In addition, after OLT receives the sequence number of ONU transmissions, determine that the ONU that the sequence number represents is not configured in the olt It is not activated, then before the authentication request message that ONU receives that OLT is sent, further includes：ONU receives the 3rd that OLT is sent and surveys Away from request message；ONU sends the 3rd ranging response message to OLT, so that OLT obtains the 3rd distance measurement result.

Fig. 8 only accounts for the situation of the OFDM-PON systems of Single wavelength into embodiment illustrated in fig. 10, for based on For the OFDM-PON systems of Nyquist multiplexing technologies and multi-wavelength OFDM-PON systems based on WDM technology, it registers activation Method difference.

Figure 11 be OFDM-PON registration activation methods embodiment nine provided in an embodiment of the present invention flow chart, the present embodiment It is the registration activation method of the OFDM-PON systems based on Nyquist multiplexing technologies, as shown in figure 11, the method bag of the present embodiment Include：

Step S1101, optical network unit receive spectral range or all downstream spectrum scope of the optical line terminal in acquiescence Or the login request message that management passage is sent using acquiescence downstream bits carrying table.

Step S1102, the registration reply message that optical network unit is sent using default upstream bit carrying table, the registration are rung Message is answered to include the sequence number of optical network unit.

Step S1103, optical network unit receive the optical network unit marks that optical line terminal is sent, the optical network unit mark Know for optical line terminal determine the sequence number represent optical network unit by be after certification the sequence number represent optical-fiber network Unit distribution.

Step S1104, receives the first ranging request information of optical line terminal transmission by the optical network unit of certification With downlink training sequence.

Step S1105, optical network unit receive the frequency spectrum distribution information that optical line terminal is sent.

Step S1106, optical network unit distribute information by adjusting electric tunable filter by spectrum operation model according to frequency spectrum Enclose and be adjusted to target wave band.

Step S1107, optical network unit are sent under the first ranging response message and optical network unit to optical line terminal Row bit carries table and uplink training sequence, so that optical line terminal obtains the first distance measurement result.

Step S1108, optical network unit send the downstream bits carrying table and uplink of optical network unit to optical line terminal Training sequence so that optical line terminal according to uplink training sequence calculate optical network unit upstream bits carrying table and according to The downstream bits carrying table of optical network unit and the upstream bits carrying meter of optical network unit are calculated and update system descending bit Carry table and system uplink bit carrying table.

Step S1109, optical network unit receive and update the system descending bit carrying table of optical line terminal transmission and be Upstream bits of uniting carrying table.

Step S1110, optical network unit receive the second distance measurement request message that optical line terminal is sent.

Step S1111, optical network unit sends second of ranging response message to optical line terminal, so that optical line terminal Obtain the second distance measurement result.

In addition, in embodiment illustrated in fig. 11, step S1105 and step S1106 are that OLT receives the sequence number that ONU is sent Afterwards, determine what is carried out after ONU that the sequence number represents is configured in the olt.After if OLT receives the sequence number of ONU transmissions, really The ONU that the fixed sequence number represents is not configured in the olt not to be activated, then without step S1105 and step S1106, but with Step S1003 is similar in embodiment illustrated in fig. 10, disappears in the registration request that optical network unit reception optical line terminal is resend Before breath, further include：Optical network unit receives the frequency spectrum distribution information that optical line terminal is sent；Optical network unit is according to frequency spectrum point Spectrum operation scope is adjusted to target wave band by adjusting electric tunable filter with information.

The flow chart of Figure 12 OFDM-PON registration activation methods embodiments ten provided in an embodiment of the present invention, the present embodiment are The registration activation method of multi-wavelength OFDM-PON systems based on WDM technology, as shown in figure 12, the method for the present embodiment includes：

Step S1201, optical network unit receive optical line terminal in all downstream wavelengths or the initial wavelength or public affairs of acquiescence The login request message sent altogether in management of wavelengths using acquiescence downstream bits carrying table.

Step S1202, optical network unit is by adjusting after light adjustable transmitter in any upstream wavelength or with receiving light net Network unit sends what is sent in the corresponding upstream wavelength of downstream wavelength of login request message using default upstream bit carrying table Registration reply message, the registration reply message include the sequence number of optical network unit.

Specifically, when the uplink and downlink wavelength of OFDM-PON systems is unbound, optical network unit can be readjusted the distribution by adjusting light Penetrate the registration reply message sent after machine in any upstream wavelength using default upstream bit carrying table；When OFDM-PON systems The binding of uplink and downlink wavelength when, optical network unit is registered sending with receiving optical network unit after light adjustable transmitter by adjusting The registration reply message sent in the corresponding upstream wavelength of downstream wavelength of request message using default upstream bit carrying table.

Step S1203, optical network unit receive the optical network unit marks that optical line terminal is sent, the optical network unit mark Know for optical line terminal determine the sequence number represent optical network unit by be after certification the sequence number represent optical-fiber network Unit distribution.

Step S1204, receives the first ranging request information of optical line terminal transmission by the optical network unit of certification With downlink training sequence.

Step S1205, optical network unit receive the Wavelength Assignment information that optical line terminal is sent, which is Optical line terminal is optical network unit distribution.

Step S1206, optical network unit adjust optical network unit optical sender and photoreceiver according to Wavelength Assignment information Wavelength.

Step S1207, optical network unit are sent under the first ranging response message and optical network unit to optical line terminal Row bit carries table and uplink training sequence, so that optical line terminal obtains the first distance measurement result.

Step S1208, optical network unit send the downstream bits carrying table and uplink of optical network unit to optical line terminal Training sequence so that optical line terminal according to uplink training sequence calculate optical network unit upstream bits carrying table and according to The downstream bits carrying table of optical network unit and the upstream bits carrying meter of optical network unit are calculated and update system descending bit Carry table and system uplink bit carrying table.

Step S1209, optical network unit receive and update the system descending bit carrying table of optical line terminal transmission and be Upstream bits of uniting carrying table.

Step S1210, optical network unit receive the second distance measurement request message that optical line terminal is sent.

Step S1211, optical network unit sends second of ranging response message to optical line terminal, so that optical line terminal Obtain the second distance measurement result.

In addition, in embodiment illustrated in fig. 12, step S1205 and step S1206 are that OLT receives the sequence number that ONU is sent Afterwards, determine what is carried out after ONU that the sequence number represents is configured in the olt.After if OLT receives the sequence number of ONU transmissions, really The ONU that the fixed sequence number represents is not configured in the olt not to be activated, then without step S1205 and step S1206, but with Step S1003 is similar in embodiment illustrated in fig. 10, disappears in the registration request that optical network unit reception optical line terminal is resend Before breath, further include：Optical network unit receives the Wavelength Assignment information that optical line terminal is sent, which is light Road terminal is optical network unit distribution；Optical network unit adjusts optical network unit optical sender and light according to Wavelength Assignment information The wavelength of receiver.

Figure 13 is the signaling process figure of OFDM-PON registration activation methods embodiment 11 provided in an embodiment of the present invention, this Embodiment is the registration activation method of Single wavelength OFDM-PON systems, and ONU is configured in the olt in the present embodiment and is activated, As shown in figure 13, the method for the present embodiment includes：

Step S1301, OLT send ONU registration requests with default bit carrying table.

Step S1302, ONU are with default bit carrying table response registration request.

Step S1303, if SN is configured and is activated, OLT is that the ONU that the SN is represented distributes ONU-ID, i.e., complete by SN Into certification.

Step S1304, OLT initiation first time ranging, is completed under the cooperation of ONU.

Step S1305, training sequence is included in the downlink PMD frames that OLT is sent, and ONU is according to the training sequence meter of reception The SNR of each subcarrier is calculated, and calculates the downstream bits carrying table of the ONU, the downstream bits of the ONU calculated are carried Table issues OLT.

Step S1306, also includes training sequence, OLT is according to the training sequence for receiving ONU in the uplink PMD frames that ONU is sent The SNR of each subcarrier of column count, and the upstream bits carrying table of the ONU is calculated, table is carried by upstream bits with default bit Carrying table is sent to ONU.

Step S1307, OLT carry meter calculation system downstream bits carrying table according to the downstream bits of received ONU, and It is sent to ONU.

Step S1308, OLT and ONU more new system uplink and downlink bit carry table, OLT restarting rangings, and ONU is responded simultaneously Complete second of ranging.

Figure 14 is the signaling process figure of OFDM-PON registration activation methods embodiment 12 provided in an embodiment of the present invention, this Embodiment is the registration activation method of Single wavelength OFDM-PON systems, and ONU is configured in the olt in the present embodiment but is not swashed Living, as shown in figure 14, the method for the present embodiment includes：

Step S1401, OLT send ONU registration requests with default bit carrying table.

Step S1402, ONU are with default bit carrying table response registration request.

Step S1403, OLT send certification request, and certification request can be with ONU registration requests or distance measurement request in a frame Complete.

Step S1404, ONU response certification request, including certification password（Password）Or certification mark （RegisterID）.

Step S1405, if SN+（Password or RegisterID）Legal, OLT distributes ONU-ID for the ONU, that is, completes Certification.

Step S1406, OLT initiation first time ranging, is completed under the cooperation of ONU.

Step S1407, training sequence is included in the downlink PMD frames that OLT is sent, and ONU is according to the training sequence meter of reception The SNR of each subcarrier is calculated, and calculates the downstream bits carrying table of the ONU, the downstream bits of the ONU calculated are carried Table issues OLT.

Step S1408, also includes training sequence, OLT is according to the training sequence for receiving ONU in the uplink PMD frames that ONU is sent The SNR of each subcarrier of column count, and the upstream bits carrying table of the ONU is calculated, table is carried by upstream bits with default bit Carrying table is sent to ONU.

Step S1409, OLT carry meter calculation system downstream bits carrying table according to the downstream bits of received ONU, and It is sent to ONU.

Step S1410, OLT and ONU more new system uplink and downlink bit carry table, OLT restarting rangings, and ONU is responded simultaneously Complete second of ranging.

Figure 15 is the signaling process figure of OFDM-PON registration activation methods embodiment 13 provided in an embodiment of the present invention, this Embodiment is the registration activation method of Single wavelength OFDM-PON systems, and ONU is not configured in the olt in the present embodiment is not swashed Living, as shown in figure 15, the method for the present embodiment includes：

Step S1501, OLT send ONU registration requests with default bit carrying table.

Step S1502, ONU are with default bit carrying table response registration request.

Step S1503, to the ONU of unknown SN, OLT first distributes interim ONU-ID.

Step S1504, OLT initiation first time ranging, is completed under the cooperation of ONU.

Step S1505, OLT send certification request, and certification request can be with ONU registration requests or distance measurement request in a frame Complete.

Step S1506, ONU response certification request, including certification password（Password）Or certification mark （RegisterID）.

Step S1507, if SN+（Password or RegisterID）Legal, OLT distributes ONU-ID for the ONU, that is, completes Certification.

Step S1508, OLT send line Deactivate_ONU-ID under ONU, and discharge interim ONU-ID.

Step S1509, OLT re-initiate ONU registration requests.

Step S1510, ONU response registration request.

Step S1511, OLT distribute corresponding ONU-ID, i.e., formal ONU-ID to known SN.

Step S1512, OLT second of ranging of initiation, is completed under the cooperation of ONU.

Step S1513, training sequence is included in the downlink PMD frames that OLT is sent, and ONU is according to the training sequence meter of reception The SNR of each subcarrier is calculated, and calculates the downstream bits carrying table of the ONU, the downstream bits of the ONU calculated are carried Table issues OLT.

Step S1514, also includes training sequence, OLT is according to the training sequence for receiving ONU in the uplink PMD frames that ONU is sent The SNR of each subcarrier of column count, and the upstream bits carrying table of the ONU is calculated, table is carried by upstream bits with default bit Carrying table is sent to ONU.

Step S1515, OLT carry meter calculation system downstream bits carrying table according to the downstream bits of received ONU, and It is sent to ONU.

Step S1516, OLT and ONU more new system uplink and downlink bit carry table, OLT restarting rangings, and ONU is responded simultaneously Complete third time ranging.

Figure 13, for downlink data, in normal operating phase, there is two kinds of working methods into embodiment illustrated in fig. 15, point Not Wei each subcarrier of downlink to be time-multiplexed（Time Division Multiplexing, TDM）Mode works, i.e. 1 symbol （symbol）As soon as only transmitting the data of an ONU, sending its bit carrying table as OLT when sending certain ONU data should The bit carrying table of symbol, the head of each symbol is included ONU-ID information, is represented with default bit bearing value；Under or Each subcarrier of row is with frequency division multiplexing（Frequency Division Multiplexing, FDM）Mode works, and is different ONU distributes different subcarriers, and the bit bearing value that downstream bits carrying table corresponds to subcarrier with each ONU forms.Upstream data ONU works in a tdm fashion in area of light, i.e., 1 symbol only transmits the data of an ONU, in normal operating phase, OLT according to Bandwidth map figure（Bandwidth Map, BWMAP）Switching receives bit carrying table used, similar with existing TDM-PON, such as Gigabit passive optical network（Gigabit Passive Optical Network, GPON）, Ethernet passive optical network （Ethernet Passive Optical Network, EPON）、10G-EPON、10G-GPON.

Figure 16 is the signaling process figure of OFDM-PON registration activation methods embodiment 14 provided in an embodiment of the present invention, this Embodiment is the registration activation method of the OFDM-PON systems based on Nyquist multiplexing technologies, and ONU is in the olt in the present embodiment Configured and be activated, as shown in figure 16, the method for the present embodiment includes：

Step S1601, OLT acquiescence spectral range or all downstream spectrum scopes or management passage, with default bit Carry table and send ONU registration requests.

Step S1602, ONU adjust electric tunable filter, make its spectral range acquiescence spectral range corresponding with OLT, Or all downstream spectrum scopes or management passage, downlink frame is received with default bit carrying table, and with default bit carrying table hair Its sequence number SN is given, responds registration request.

Step S1603, if SN is configured and is activated, OLT is that the ONU that the SN is represented distributes ONU-ID, i.e., complete by SN Into certification.

Step S1604, OLT initiation first time ranging, is completed under the cooperation of ONU.

Step S1605, OLT distribute the downstream spectrum working range of ONU, that is, it is with baseband mode or with mixed to determine ONU Syntype works.

Step S1606, ONU adjust the spectrum operation scope of downlink electrical tunable filter to target ripple according to receive information Section.

Step S1607, OLT send training sequence in new downstream spectrum with default bit carrying table.

Step S1608, ONU calculate the SNR of each subcarrier according to received training sequence, and calculate the downlink ratio of the ONU Spy's carrying table, OLT is issued by the downstream bits carrying table of the ONU calculated.

Step S1609, also includes training sequence, OLT is according to the training sequence for receiving ONU in the uplink PMD frames that ONU is sent The SNR of each subcarrier of column count, and the upstream bits carrying table of the ONU is calculated, table is carried by upstream bits with default bit Carrying table is sent to ONU.

Step S1610, OLT carry meter calculation system downstream bits carrying table according to the downstream bits of received ONU, and It is sent to ONU.

Step S1611, OLT and ONU more new system uplink and downlink bit carry table, OLT restarting rangings, and ONU is responded simultaneously Complete second of ranging.

Figure 17 is the signaling process figure of OFDM-PON registration activation methods embodiment 15 provided in an embodiment of the present invention, this Embodiment is the registration activation method of the OFDM-PON systems based on Nyquist multiplexing technologies, and ONU is in the olt in the present embodiment Configured but be not activated, as shown in figure 17, the method for the present embodiment includes：

Step S1701, OLT acquiescence spectral range or all downstream spectrum scopes or management passage, with default bit Carry table and send ONU registration requests.

Step S1702, ONU adjust electric tunable filter, make its spectral range acquiescence spectral range corresponding with OLT, Or all downstream spectrum scopes or management passage, downlink frame is received with default bit carrying table, and with default bit carrying table hair Its sequence number SN is given, responds registration request.

Step S1703, OLT send certification request, and certification request can be with ONU registration requests or distance measurement request in a frame Complete.

Step S1704, ONU response certification request, including certification password（Password）Or certification mark （RegisterID）.

Step S1705, if SN+（Password or RegisterID）Legal, OLT distributes ONU-ID for the ONU, that is, completes Certification.

Step S1706, OLT initiation first time ranging, is completed under the cooperation of ONU.

Step S1707, OLT distribute the downstream spectrum working range of ONU, that is, it is with baseband mode or with mixed to determine ONU Syntype works.

Step S1708, ONU adjust the spectrum operation scope of downlink electrical tunable filter to target ripple according to receive information Section.

Step S1709, OLT send training sequence in new downstream spectrum with default bit carrying table.

Step S1710, ONU calculate the SNR of each subcarrier according to the training sequence of reception, and calculate the downlink of the ONU Bit carries table, and the downstream bits carrying table of the ONU calculated is issued OLT.

Step S1711, also includes training sequence, OLT is according to the training sequence for receiving ONU in the uplink PMD frames that ONU is sent The SNR of each subcarrier of column count, and the upstream bits carrying table of the ONU is calculated, table is carried by upstream bits with default bit Carrying table is sent to ONU.

Step S1712, OLT carry meter calculation system downstream bits carrying table according to the downstream bits of received ONU, and It is sent to ONU.

Step S1713, OLT and ONU more new system uplink and downlink bit carry table, OLT restarting rangings, and ONU is responded simultaneously Complete second of ranging.

Figure 18 is the signaling process figure of OFDM-PON registration activation methods embodiment 16 provided in an embodiment of the present invention, this Embodiment is the registration activation method of the OFDM-PON systems based on Nyquist multiplexing technologies, and ONU is in the olt in the present embodiment Do not configure and be not activated, as shown in figure 18, the method for the present embodiment includes：

Step S1801, OLT acquiescence spectral range or all downstream spectrum scopes or management passage, with default bit Carry table and send ONU registration requests.

Step S1802, ONU adjust electric tunable filter, make its spectral range acquiescence spectral range corresponding with OLT, Or all downstream spectrum scopes or management passage, downlink frame is received with default bit carrying table, and with default bit carrying table hair Its sequence number SN is given, responds registration request.

Step S1803, to the ONU of unknown SN, OLT first distributes interim ONU-ID.

Step S1804, OLT initiation first time ranging, is completed under the cooperation of ONU.

Step S1805, OLT send certification request, and certification request can be with ONU registration requests or distance measurement request in a frame Complete.

Step S1806, ONU response certification request, including certification password（Password）Or certification mark （RegisterID）.

Step S1807, if SN+（Password or RegisterID）Legal, OLT distributes ONU-ID for the ONU, that is, completes Certification.

Step S1808, OLT distribute the downstream spectrum working range of ONU, that is, it is with baseband mode or with mixed to determine ONU Syntype works.

Step S1809, OLT send line Deactivate_ONU-ID under ONU, and discharge interim ONU-ID.

Step S1810, ONU adjust the spectrum operation scope of downlink electrical tunable filter to target ripple according to receive information Section.

Step S1811, OLT re-initiate ONU registration requests.

Step S1812, ONU response registration request.

Step S1813, OLT distribute corresponding ONU-ID, i.e., formal ONU-ID to known SN.

Step S1814, OLT second of ranging of initiation, is completed under the cooperation of ONU.

Step S1815, training sequence is included in the downlink PMD frames that OLT is sent, and ONU is according to the training sequence meter of reception The SNR of each subcarrier is calculated, and calculates the downstream bits carrying table of the ONU, the downstream bits of the ONU calculated are carried Table issues OLT.

Step S1816, also includes training sequence, OLT is according to the training sequence for receiving ONU in the uplink PMD frames that ONU is sent The SNR of each subcarrier of column count, and the upstream bits carrying table of the ONU is calculated, table is carried by upstream bits with default bit Carrying table is sent to ONU.

Step S1817, OLT carry meter calculation system downstream bits carrying table according to the downstream bits of received ONU, and It is sent to ONU.

Step S1818, OLT and ONU more new system uplink and downlink bit carry table, OLT restarting rangings, and ONU is responded simultaneously Complete third time ranging.

Figure 16 is into embodiment illustrated in fig. 18, and for downlink data, the frequency spectrum of downlink is divided into two wave bands, with frequency division or The mode of Nyquist multiplexings works, and ONU selects one of band operation by electric tunable filter.In normal operating phase, On each wave band, there are two kinds of working methods, be respectively that each subcarrier of downlink works in a tdm fashion, i.e., 1 symbol only transmits one The data of a ONU, the bit for just sending the symbol when sending certain ONU data using its bit carrying table as OLT carry Table, the head of each symbol are included ONU-ID information, are represented with default bit bearing value；Or each subcarrier of downlink is with FDM Mode works, and is that different ONU distribute different subcarriers, downstream bits carrying table corresponds to the bit of subcarrier with each ONU Bearing value forms.Upstream data ONU works in a tdm fashion in area of light, i.e., 1 symbol only transmits the data of an ONU, just The normal operation phase, OLT receives bit used according to BWMAP switchings and carries table, similar with existing TDM-PON, as GPON, EPON、10G-EPON、10G-GPON。

Figure 19 is the signaling process figure of OFDM-PON registration activation methods embodiment 17 provided in an embodiment of the present invention, this Embodiment is the registration activation method of the multi-wavelength OFDM-PON systems based on WDM technology, and ONU has been in the olt in the present embodiment Configure and be activated, as shown in figure 19, the method for the present embodiment includes：

Step S1901, OLT are in the initial wavelength or public administration wavelength of all downstream wavelengths or acquiescence, to give tacit consent to ratio Spy's carrying table, sends ONU registration requests.

Step S1902, ONU adjust optic tunable filter to any downstream wavelength or the initial wavelength or public administration of acquiescence On wavelength, downlink frame is received with default bit carrying table, ONU adjusts optical sender to upstream wavelength corresponding with downstream wavelength （The scene of uplink and downlink wavelength binding）Or any wavelength（Uplink and downlink wavelength unbundling）On, and it is sent with default bit carrying table Sequence number SN, responds registration request.

Step S1903, if SN is configured and is activated, OLT is that the ONU that the SN is represented distributes ONU-ID, i.e., complete by SN Into certification.

Step S1904, OLT initiation first time ranging, is completed under the cooperation of ONU.

The uplink and downlink operation wavelength of step S1905, OLT distribution ONU, ONU is sent to default bit carrying table.

Step S1906, ONU set the optical sender of ONU and the operation wavelength of receiver according to Wavelength Assignment information.

Step S1907, OLT send training sequence in new downstream wavelength with default bit carrying table.

Step S1908, ONU calculate the SNR of each subcarrier according to the training sequence of reception, and calculate the downlink of the ONU Bit carries table, and the downstream bits of the ONU then are carried table and training with default bit carrying table in new upstream wavelength Sequence sends OLT.

Step S1909, OLT calculate the SNR of each subcarrier according to the training sequence for receiving ONU, and calculate the upper of the ONU Row bit carries table, and upstream bits carrying table is sent to ONU with default bit carrying table.

Step S1910, OLT carry meter calculation system downstream bits carrying table according to the downstream bits of received ONU, and It is sent to ONU.

Step S1911, OLT and ONU more new system uplink and downlink bit carry table, OLT restarting rangings, and ONU is responded simultaneously Complete second of ranging.

Figure 20 is the signaling process figure of OFDM-PON registration activation methods embodiment 18 provided in an embodiment of the present invention, this Embodiment is the registration activation method of the multi-wavelength OFDM-PON systems based on WDM technology, and ONU has been in the olt in the present embodiment Configure but be not activated, as shown in figure 20, the method for the present embodiment includes：

Step S2001, OLT are in the initial wavelength or public administration wavelength of all downstream wavelengths or acquiescence, to give tacit consent to ratio Spy's carrying table, sends ONU registration requests.

Step S2002, ONU adjust optic tunable filter to any downstream wavelength or the initial wavelength or public administration of acquiescence On wavelength, downlink frame is received with default bit carrying table, ONU adjusts optical sender to upstream wavelength corresponding with downstream wavelength （The scene of uplink and downlink wavelength binding）Or any wavelength（Uplink and downlink wavelength unbundling）On, and it is sent with default bit carrying table Sequence number SN, responds registration request.

Step S2003, OLT send certification request, and certification request can be with ONU registration requests or distance measurement request in a frame Complete.

Step S2004, ONU response certification request, including certification password（Password）Or certification mark （RegisterID）.

Step S2005, if SN+（Password or RegisterID）Legal, OLT distributes ONU-ID for the ONU, that is, completes Certification.

Step S2006, OLT initiation first time ranging, is completed under the cooperation of ONU.

The uplink and downlink operation wavelength of step S2007, OLT distribution ONU, ONU is sent to default bit carrying table.

Step S2008, ONU set the optical sender of ONU and the operation wavelength of receiver according to Wavelength Assignment information.

Step S2009, OLT send training sequence in new downstream wavelength with default bit carrying table.

Step S2010, ONU calculate the SNR of each subcarrier according to the training sequence of reception, and calculate the downlink of the ONU Bit carries table, and the downstream bits of the ONU then are carried table and training with default bit carrying table in new upstream wavelength Sequence sends OLT.

Step S2011, OLT calculate the SNR of each subcarrier according to the training sequence for receiving ONU, and calculate the upper of the ONU Row bit carries table, and upstream bits carrying table is sent to ONU with default bit carrying table.

Step S2012, OLT carry meter calculation system downstream bits carrying table according to the downstream bits of received ONU, and It is sent to ONU.

Step S2013, OLT and ONU more new system uplink and downlink bit carry table, OLT restarting rangings, and ONU is responded simultaneously Complete second of ranging.

Figure 21 is the signaling process figure of OFDM-PON registration activation methods embodiment 19 provided in an embodiment of the present invention, this Embodiment is the registration activation method of the multi-wavelength OFDM-PON systems based on WDM technology, and ONU is not in the olt in the present embodiment Configuration is not activated, and as shown in figure 21, the method for the present embodiment includes：

Step S2101, OLT are in the initial wavelength or public administration wavelength of all downstream wavelengths or acquiescence, to give tacit consent to ratio Spy's carrying table, sends ONU registration requests.

Step S2102ONU adjusts optic tunable filter to any downstream wavelength or the initial wavelength or public administration of acquiescence On wavelength, downlink frame is received with default bit carrying table, ONU adjusts optical sender to upstream wavelength corresponding with downstream wavelength （The scene of uplink and downlink wavelength binding）Or any wavelength（Uplink and downlink wavelength unbundling）On, and it is sent with default bit carrying table Sequence number SN, responds registration request.

Step S2103, to the ONU of unknown SN, OLT first distributes interim ONU-ID.

Step S2104, OLT initiation first time ranging, is completed under the cooperation of ONU.

Step S2105, OLT send certification request, and certification request can be with ONU registration requests or distance measurement request in a frame Complete.

Step S2106, ONU response certification request, including certification password（Password）Or certification mark （RegisterID）.

Step S2107, if SN+（Password or RegisterID）Legal, OLT distributes ONU-ID for the ONU, that is, completes Certification.

The uplink and downlink operation wavelength of step S2108, OLT distribution ONU, ONU is sent to default bit carrying table.

Step S2109, OLT send line Deactivate_ONU-ID under ONU, and discharge interim ONU-ID.

Step S2110, ONU set the optical sender of ONU and the operation wavelength of receiver according to Wavelength Assignment information.

Step S2111, OLT re-initiate ONU registration requests.

Step S2112, ONU response registration request.

Step S2113, OLT distribute corresponding ONU-ID, i.e., formal ONU-ID to known SN.

Step S2114, OLT second of ranging of initiation, is completed under the cooperation of ONU.

Step S2115, training sequence is included in the downlink PMD frames that OLT is sent, and ONU is according to the training sequence meter of reception The SNR of each subcarrier is calculated, and calculates the downstream bits carrying table of the ONU, the downstream bits of the ONU calculated are carried Table issues OLT.

Step S2116, also includes training sequence, OLT is according to the training sequence for receiving ONU in the uplink PMD frames that ONU is sent The SNR of each subcarrier of column count, and the upstream bits carrying table of the ONU is calculated, table is carried by upstream bits with default bit Carrying table is sent to ONU.

Step S2117, OLT carry meter calculation system downstream bits carrying table according to the downstream bits of received ONU, and It is sent to ONU.

Step S2118, OLT and ONU more new system uplink and downlink bit carry table, OLT restarting rangings, and ONU is responded simultaneously Complete third time ranging.

Figure 19 is into embodiment illustrated in fig. 21, and for downlink data, downlink is divided into different lead to according to the wavelength of light carrier Road, ONU select one of downstream wavelength to work, can be selected by the wavelength for adjusting adjustable transmitter by optic tunable filter Select one of upstream wavelength work.On normal operating phase, each wavelength channel, there are two kinds of working methods, under being respectively Each subcarrier of row works in a tdm fashion, as soon as that is, 1 symbol only transmits the data of an ONU, when sending certain ONU data The bit carrying table of the symbol is sent using its bit carrying table as OLT, the head of each symbol includes ONU-ID information, Represented with default bit bearing value；It is that different ONU distribute different sons or each subcarrier of downlink is worked in a manner of FDM Carrier wave, the bit bearing value that downstream bits carrying table corresponds to subcarrier with each ONU form.Upstream data ONU is in area of light with TDM side Formula works, i.e., 1 symbol only transmits the data of an ONU, and in normal operating phase, OLT is according to used in receiving BWMAP switchings Bit carrying table, it is similar with existing TDM-PON, such as GPON, EPON, 10G-EPON, 10G-GPON.

Figure 22 is the structure diagram of optical line terminal embodiment one provided in an embodiment of the present invention, as shown in figure 22, this The optical line terminal of embodiment includes：

Sending module 221, for sending downlink training sequence to the optical network unit by certification.

Receiving module 222, the downstream bits carrying of the optical network unit sent for receiving the optical network unit Table and uplink training sequence, the downstream bits carrying table of the optical network unit are instructed for the optical network unit according to the downlink Practice what sequence calculated.

Computing module 223, the upstream bits for calculating the optical network unit according to the uplink training sequence carry Table.

Update module 224, for carrying table and the optical network unit according to the downstream bits of the optical network unit Upstream bits carrying meter is calculated and updates system descending bit carrying table and system uplink bit carrying table.

Sending module 221, is additionally operable to send the system descending bit carrying table and the system to the optical network unit Upstream bits of uniting carrying table, so that the optical network unit updates the system descending bit carrying table and system uplink ratio Spy's carrying table.

The optical line terminal of the present embodiment is used to performing the technical solution of embodiment of the method shown in Fig. 3, its realization principle and Technique effect is similar, and details are not described herein again.

Further, in embodiment illustrated in fig. 22, computing module 223, specifically for according to the uplink training sequence meter Calculate the signal-to-noise ratio for each uplink sub-carrier for receiving the uplink training sequence；According to each uplink for receiving the uplink training sequence The upstream bits carrying table of optical network unit described in the signal-to-noise ratio computation of subcarrier.

Further, in embodiment illustrated in fig. 22, update module 224, specifically for the system descending bit is carried A less conduct in the bit bearing value of table downlink sub-carrier identical with the downstream bits carrying table of the optical network unit The bit bearing value of the downlink sub-carrier, to update the system descending bit carrying table；The system uplink bit is carried A less conduct in the bit bearing value of table uplink sub-carrier identical with the upstream bits carrying table of the optical network unit The bit bearing value of the uplink sub-carrier, to update the system uplink bit carrying table；Or the optical line terminal is by institute The upstream bits carrying table of optical network unit and the upstream bits carrying table of other optical network units are stated collectively as the system Upstream bits carry table.

Further, in embodiment illustrated in fig. 22, sending module 221, is additionally operable to send second to the optical network unit Distance measurement request message；Receiving module 222, is additionally operable to receive the second ranging response message that the optical network unit is sent, to obtain Obtain the second distance measurement result.

Figure 23 is the structure diagram of optical line terminal embodiment two provided in an embodiment of the present invention, as shown in figure 23, this The optical line terminal of embodiment on the basis of Figure 22,

Sending module 221, is also used for acquiescence downstream bits carrying table and sends registration request to the optical network unit Message.

Receiving module 222, is additionally operable to receive the registration that the optical network unit uses default upstream bit carrying table to send Response message, the registration reply message include the sequence number of the optical network unit；

The optical line terminal further includes：Authentication module 225, for determining that the optical network unit that the sequence number represents has led to The optical network unit crossed certification and represented for the sequence number distributes optical network unit marks.

Sending module 221, is additionally operable to send the optical network unit marks to the optical network unit.

The optical line terminal of the present embodiment is used to performing the technical solution of embodiment of the method shown in Fig. 5, its realization principle and Technique effect is similar, and details are not described herein again.

Further, in embodiment illustrated in fig. 23, authentication module 225, specifically for if it is determined that what the sequence number represented Optical network unit is configured and is activated, it is determined that the optical network unit that the sequence number represents by certification and has been the sequence The optical network unit that row number represents distributes the optical network unit marks.

Further, in embodiment illustrated in fig. 23, authentication module 225, specifically for if it is determined that what the sequence number represented Optical network unit is configured but is not activated, then sends authentication request message to the optical network unit；Receive the optical-fiber network The authentication response message that unit is sent, the authentication response message include the certification mark of the optical network unit and/or recognize Demonstrate,prove password；If it is determined that the sequence number of the optical network unit and the certification mark and/or certification password of the optical network unit are closed Method, it is determined that the optical network unit that the sequence number represents by certification and has been the optical network unit point of sequence number representative With the optical network unit marks.

Further, in embodiment illustrated in fig. 23, authentication module 225, specifically for if it is determined that the optical network unit Sequence number is not configured and is not activated, then distributes interim optical network unit marks for the optical network unit；To the optical-fiber network Unit sends authentication request message；The authentication response message that the optical network unit is sent is received, in the authentication response message Certification mark and/or certification password including the optical network unit；If it is determined that the sequence number of the optical network unit with it is described The certification mark and/or certification password of optical network unit are legal, it is determined that the optical network unit has passed through certification；To the light Network unit sends lower line, and discharges the casual network mark；The registration is resend to the optical network unit Request message；Receive the registration reply message that the optical network unit is resend, and the light represented for the sequence number Network unit distributes the optical network unit marks.

Further, in embodiment illustrated in fig. 23, sending module 221, is additionally operable to send the 3rd to the optical network unit Distance measurement request message；Receiving module 222, is additionally operable to receive the 3rd ranging response message that the optical network unit is sent, to obtain Obtain the 3rd distance measurement result.

Further, in embodiment illustrated in fig. 23, sending module 221, specifically for the spectral range or all in acquiescence Downstream spectrum scope or management passage carry table using acquiescence downstream bits and send login request message to the optical network unit.

Figure 24 is the structure diagram of optical line terminal embodiment three provided in an embodiment of the present invention, as shown in figure 24, this The optical line terminal of embodiment further includes on the basis of Figure 23：

Frequency spectrum distribution module 226, for sending frequency spectrum distribution information to the optical network unit, so that the optical-fiber network list Member distributes information according to the frequency spectrum and spectrum operation scope is adjusted to target wave band by adjusting electric tunable filter.

The optical line terminal of the present embodiment is used to performing the technical solution of embodiment of the method shown in Fig. 6, its realization principle and Technique effect is similar, and details are not described herein again.

Further, in embodiment illustrated in fig. 23, sending module 221, specifically in all downstream wavelengths or acquiescence Registration request is sent in initial wavelength or public administration wavelength to the optical network unit using acquiescence downstream bits carrying table to disappear Breath；Receiving module 222, specifically for receiving the optical network unit by adjusting after light adjustable transmitter in any upstream wavelength Or use default upstream in upstream wavelength corresponding with the downstream wavelength that the reception optical network unit sends login request message The registration reply message that bit carrying table is sent, the registration reply message include the sequence number of the optical network unit.

Figure 25 is the structure diagram of optical line terminal example IV provided in an embodiment of the present invention, as shown in figure 25, this The optical line terminal of embodiment further includes on the basis of Figure 23：

Wavelength Assignment module 227, for distributing upstream wavelength and downstream wavelength for the optical network unit；To the light net Network unit sends Wavelength Assignment information, so that the optical network unit adjusts the optical-fiber network list according to the Wavelength Assignment information The wavelength of first optical sender and photoreceiver.

The optical line terminal of the present embodiment is used to performing the technical solution of embodiment of the method shown in Fig. 7, its realization principle and Technique effect is similar, and details are not described herein again.

Figure 26 is the structure diagram of optical network unit embodiment one provided in an embodiment of the present invention, as shown in figure 26, this The optical network unit of embodiment includes：

Receiving module 261, for receiving the downlink training sequence of optical line terminal transmission.

Computing module 262, the downstream bits for calculating the optical network unit according to the downlink training sequence carry Table.

Sending module 263, for sent to the optical line terminal optical network unit downstream bits carrying table and Uplink training sequence, so that the optical line terminal calculates the uplink ratio of the optical network unit according to the uplink training sequence Spy's carrying table and the upstream bits carrying that table and the optical network unit are carried according to the downstream bits of the optical network unit Meter is calculated and updates system descending bit carrying table and system uplink bit carrying table.

Update module 264, the system descending bit carrying table sent for receiving and updating the optical line terminal Table is carried with the system uplink bit.

The optical network unit of the present embodiment is used to performing the technical solution of embodiment of the method shown in Fig. 8, its realization principle and Technique effect is similar, and details are not described herein again.

Further, in embodiment illustrated in fig. 26, computing module 263, specifically for according to the downlink training sequence meter Calculate the signal-to-noise ratio for each downlink sub-carrier for receiving the downlink training sequence；According to each downlink for receiving the downlink training sequence The downstream bits carrying table of optical network unit described in the signal-to-noise ratio computation of subcarrier.

Further, in embodiment illustrated in fig. 26, receiving module 261, is additionally operable to receive what the optical line terminal was sent Second distance measurement request message；Sending module 262, is additionally operable to send second of ranging response message to the optical line terminal, with The optical line terminal is set to obtain the second distance measurement result.

Further, in embodiment illustrated in fig. 26, receiving module 261, be additionally operable to receive the optical line terminal use it is silent Recognize the login request message of downstream bits carrying table transmission；Sending module 262, is also used for default upstream bit carrying table hair Registration reply message is sent, the registration reply message includes the sequence number of the optical network unit；Receiving module 261, is also used It is true for the optical line terminal in the optical network unit marks for receiving the optical line terminal transmission, the optical network unit marks The optical network unit that the fixed sequence number represents is by being that the optical network unit that the sequence number represents distributes after certification.

Further, in embodiment illustrated in fig. 26, receiving module 261, sends specifically for receiving the optical line terminal Optical network unit marks, the optical network unit marks determine the optical-fiber network that the sequence number represents for the optical line terminal Unit is configured and is that the optical network unit that the sequence number represents distributes after being activated.

Further, in embodiment illustrated in fig. 26, receiving module 261, sends specifically for receiving the optical line terminal Authentication request message, the authentication request message determines the optical network unit that the sequence number represents for the optical line terminal It is configured but be sent to after not being activated；Sending module 262, disappears specifically for sending authentication response to the optical line terminal Breath, the authentication response message include the certification mark and/or certification password of the optical network unit；Receiving module 261, also The optical network unit marks sent for receiving the optical line terminal, the optical network unit marks are the optical line terminal It is described after legal to determine the sequence number of the optical network unit and the certification mark of the optical network unit and/or certification password The optical network unit distribution that sequence number represents.

Further, in embodiment illustrated in fig. 26, receiving module 261, sends specifically for receiving the optical line terminal Authentication request message, the authentication request message includes interim optical network unit marks, and the authentication request message is institute State optical line terminal determine the sequence number of the optical network unit do not configure be not activated after be sent to；Sending module 262, Specifically for sending authentication response message to the optical line terminal, the authentication response message includes the optical network unit Certification mark and/or certification password；Receiving module 261, is additionally operable to receive the lower line that the optical line terminal is sent, institute State lower line for the certification mark of the sequence number of optical network unit described in the optical line terminal and the optical network unit and/ Or the legal rear transmission of certification password；Receive the login request message that the optical line terminal is resend；Sending module 262, it is additionally operable to resend the registration reply message to the optical line terminal；Receiving module 261, is additionally operable to described in reception The optical network unit marks that optical line terminal is sent.

Further, in embodiment illustrated in fig. 28, receiving module 261, is additionally operable to receive what the optical line terminal was sent 3rd distance measurement request message；Sending module 262, is additionally operable to send the 3rd ranging response message to the optical line terminal, so that The optical line terminal obtains the 3rd distance measurement result.

Further, in embodiment illustrated in fig. 26, receiving module 261, specifically for receiving the optical line terminal silent The registration request that the spectral range recognized or all downstream spectrum scopes or management passage are sent using acquiescence downstream bits carrying table Message.

Figure 27 is the structure diagram of optical network unit embodiment two provided in an embodiment of the present invention, as shown in figure 27, this The optical network unit of embodiment further includes on the basis of Figure 26：

Frequency spectrum adjustment module 265, information is distributed for receiving the frequency spectrum that the optical line terminal is sent；According to the frequency spectrum Spectrum operation scope is adjusted to target wave band by distribution information by adjusting electric tunable filter.

The optical network unit of the present embodiment is used to performing the technical solution of embodiment of the method shown in Figure 11, its realization principle and Technique effect is similar, and details are not described herein again.

Further, in embodiment illustrated in fig. 26, receiving module 261, specifically for receiving the optical line terminal in institute There is the registration sent in the initial wavelength or public administration wavelength of downstream wavelength or acquiescence using acquiescence downstream bits carrying table please Seek message；Sending module 262, specifically for by adjusting after light adjustable transmitter in any upstream wavelength or with receiving the light Network unit is sent and is sent in the corresponding upstream wavelength of downstream wavelength of login request message using default upstream bit carrying table Registration reply message, the registration reply message includes the sequence number of the optical network unit.

Figure 28 is the structure diagram of optical network unit embodiment three provided in an embodiment of the present invention, as shown in figure 28, this The optical network unit of embodiment further includes on the basis of Figure 26：

Wavelength Assignment module 266, the Wavelength Assignment information sent for receiving the optical line terminal, the Wavelength Assignment Information is that the optical line terminal is what the optical network unit distributed；The optical-fiber network is adjusted according to the Wavelength Assignment information The wavelength of unit optical sender and photoreceiver.

The optical network unit of the present embodiment is used to performing the technical solution of embodiment of the method shown in Figure 12, its realization principle and Technique effect is similar, and details are not described herein again.

Figure 29 is the structure diagram of OFDM-PON system embodiments one provided in an embodiment of the present invention, as shown in figure 29, The OFDM-PON systems of the present embodiment include：

Optical line terminal 291, at least one optical network unit 292 and Optical Distribution Network 293.Wherein optical line terminal 291 The optical line terminal provided for any embodiment of the present invention, optical network unit 292 are the light net that any embodiment of the present invention provides Network unit.

Finally it should be noted that：The above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent Pipe is described in detail the present invention with reference to foregoing embodiments, it will be understood by those of ordinary skill in the art that：Its according to Can so modify to the technical solution described in foregoing embodiments, either to which part or all technical characteristic into Row equivalent substitution.Therefore, protection scope of the present invention should be subject to scope of the claims.

Claims

A kind of 1. orthogonal frequency division multiplexing passive optical network registration activation method, it is characterised in that including：

Optical line terminal to the first distance measurement request message is sent by the optical network unit of certification, believe by first distance measurement request Breath includes downlink training sequence；

The optical line terminal receive the optical network unit that the optical network unit is sent downstream bits carrying table and on Row training sequence, the optical network unit downstream bits carrying table for the optical network unit according to the downlink training sequence Calculate；

The optical line terminal receives the first ranging response message that the optical network unit is sent, to obtain the first ranging knot Fruit；

The upstream bits that the optical line terminal calculates the optical network unit according to the uplink training sequence carry table；

The optical line terminal carries the uplink ratio of table and the optical network unit according to the downstream bits of the optical network unit Spy's carrying meter is calculated and updates system descending bit carrying table and system uplink bit carrying table；

The optical line terminal sends system descending bit carrying table to the optical network unit and system uplink bit carries table, So that the optical network unit renewal system descending bit carrying table and system uplink bit carrying table；

The optical line terminal sends the system descending bit carrying table and system uplink ratio to the optical network unit Spy's carrying table, so that the optical network unit updates the system descending bit carrying table and system uplink bit carrying table Afterwards, further include：

The optical line terminal sends the second distance measurement request message to the optical network unit；

The optical line terminal receives the second ranging response message that the optical network unit is sent, to obtain the second ranging knot Fruit.
2. according to the method described in claim 1, it is characterized in that, the optical line terminal is according to the uplink training sequence meter The upstream bits carrying table of the optical network unit is calculated, including：

The optical line terminal calculates each uplink sub-carrier for receiving the uplink training sequence according to the uplink training sequence Signal-to-noise ratio；

Optical line terminal light net according to the signal-to-noise ratio computation for each uplink sub-carrier for receiving the uplink training sequence The upstream bits carrying table of network unit.
3. according to the method described in claim 1, it is characterized in that, the optical line terminal is according under the optical network unit The upstream bits of row bit carrying table and optical network unit carrying meter is calculated and updates system descending bit carrying table and be Upstream bits of uniting carrying table, including：

The downstream bits that the system descending bit is carried table and the optical network unit by the optical line terminal carry table phase With the less one bit bearing value as the downlink sub-carrier in the bit bearing value of downlink sub-carrier, to update the system Downstream bits of uniting carrying table；

The upstream bits that the system uplink bit is carried table and the optical network unit by the optical line terminal carry table phase With the less one bit bearing value as the uplink sub-carrier in the bit bearing value of uplink sub-carrier, to update the system Upstream bits of uniting carrying table；Or the upstream bits of the optical network unit are carried table and other light nets by the optical line terminal The upstream bits carrying table of network unit carries table collectively as the system uplink bit.
4. according to claims 1 to 3 any one of them method, it is characterised in that the optical line terminal is to having passed through certification Optical network unit send downlink training sequence before, further include：

The optical line terminal carries table using acquiescence downstream bits and sends login request message to the optical network unit；

The optical line terminal receives the registration reply message that the optical network unit is sent using default upstream bit carrying table, The registration reply message includes the sequence number of the optical network unit；

The optical line terminal determines that the optical network unit that the sequence number represents is represented by certification and for the sequence number Optical network unit distribution optical network unit marks；

The optical line terminal sends the optical network unit marks to the optical network unit.
A kind of 5. orthogonal frequency division multiplexing passive optical network registration activation method, it is characterised in that including：

The first distance measurement request message of optical line terminal transmission is received by the optical network unit of certification, first ranging please Ask including downlink training sequence；

The downstream bits that the optical network unit calculates the optical network unit according to the downlink training sequence carry table；

The optical network unit sends the first ranging response message to the optical line terminal, so that the optical line terminal obtains First measurement result；

The optical network unit sends the downstream bits carrying table of the optical network unit to the optical line terminal and uplink is instructed Practice sequence, so that the upstream bits that the optical line terminal calculates the optical network unit according to the uplink training sequence carry Table and the upstream bits carrying meter calculation that table and the optical network unit are carried according to the downstream bits of the optical network unit And update system descending bit carrying table and system uplink bit carrying table；

The optical network unit receives and updates the system descending bit carrying table that the optical line terminal sends and described System uplink bit carries table；

The optical network unit receives the second distance measurement request message that the optical line terminal is sent；

The optical network unit sends the second ranging response message to the optical line terminal, so that the optical line terminal obtains Second distance measurement result.
6. according to the method described in claim 5, it is characterized in that, the optical network unit is according to the downlink training sequence meter The downstream bits carrying table of the optical network unit is calculated, including：

The optical network unit calculates each downlink sub-carrier for receiving the downlink training sequence according to the downlink training sequence Signal-to-noise ratio；

Optical network unit light net according to the signal-to-noise ratio computation for each downlink sub-carrier for receiving the downlink training sequence The downstream bits carrying table of network unit.
7. according to the method described in claim 5, it is characterized in that, the optical network unit receives and updates the optical link end After downstream bits carrying table and upstream bits carrying table that end is sent, further include：

The optical network unit receives the second distance measurement request message that the optical line terminal is sent；

The optical network unit sends second of ranging response message to the optical line terminal, so that the optical line terminal obtains Take the second distance measurement result.
8. according to claim 5~7 any one of them method, it is characterised in that described to pass through the optical network unit of certification Before receiving the downlink training sequence that optical line terminal is sent, further include：

The optical network unit receives the login request message that the optical line terminal is sent using acquiescence downstream bits carrying table；

The optical network unit sends registration reply message using default upstream bit carrying table, is wrapped in the registration reply message Include the sequence number of the optical network unit；

The optical network unit receives the optical network unit marks that the optical line terminal is sent, and the optical network unit marks are The optical line terminal determines optical network unit that the sequence number represents by being light that the sequence number represents after certification Network unit distribution.
A kind of 9. optical line terminal, it is characterised in that including：

Sending module, for the first ranging request information is sent by the optical network unit of certification, first ranging please Information is asked to include downlink training sequence；

Receiving module, the downstream bits carrying table and uplink of the optical network unit sent for receiving the optical network unit Training sequence, the optical network unit downstream bits carrying table for the optical network unit according to the downlink training sequence meter Calculate；

The receiving module, is additionally operable to receive the first ranging response message that the optical network unit is sent, is surveyed with obtaining first Away from result；

Computing module, the upstream bits for calculating the optical network unit according to the uplink training sequence carry table；

Update module, for carrying the upstream bits of table and the optical network unit according to the downstream bits of the optical network unit Carrying meter is calculated and updates system descending bit carrying table and system uplink bit carrying table；

The sending module, is additionally operable to send on the system descending bit carrying table and the system to the optical network unit Row bit carries table, so that the optical network unit updates the system descending bit carrying table and the system uplink bit is held Carry table；

The sending module, is additionally operable to send the second distance measurement request message to the optical network unit；

The receiving module, is additionally operable to receive the second ranging response message that the optical network unit is sent, is surveyed with obtaining second Away from result.
10. optical line terminal according to claim 9, it is characterised in that the computing module, specifically for according to Uplink training sequence calculates the signal-to-noise ratio for each uplink sub-carrier for receiving the uplink training sequence；Instructed according to the uplink is received Practice the upstream bits carrying table of optical network unit described in the signal-to-noise ratio computation of each uplink sub-carrier of sequence.
11. optical line terminal according to claim 9, it is characterised in that the update module, specifically for by the system In the bit bearing value of downstream bits of uniting carrying table downlink sub-carrier identical with the downstream bits carrying table of the optical network unit The less one bit bearing value as the downlink sub-carrier, to update the system descending bit carrying table；By the system In the bit bearing value of upstream bits of uniting carrying table uplink sub-carrier identical with the upstream bits carrying table of the optical network unit The less one bit bearing value as the uplink sub-carrier, to update the system uplink bit carrying table；It is or described The upstream bits carrying table of the optical network unit and the upstream bits carrying table of other optical network units are total to by optical line terminal With as system uplink bit carrying table.
12. according to claim 9~11 any one of them optical line terminal, it is characterised in that the sending module, is additionally operable to Table, which is carried, using acquiescence downstream bits sends login request message to the optical network unit；

The receiving module, is additionally operable to receive the registration response that the optical network unit is sent using default upstream bit carrying table Message, the registration reply message include the sequence number of the optical network unit；

The optical line terminal further includes：Authentication module, for determining the optical network unit of the sequence number representative by recognizing Demonstrate,prove and be the optical network unit distribution optical network unit marks that the sequence number represents；

The sending module, is additionally operable to send the optical network unit marks to the optical network unit.
A kind of 13. optical network unit, it is characterised in that including：

Receiving module, for receiving the first ranging request information of optical line terminal transmission, in first ranging request information Including downlink training sequence；

Computing module, the downstream bits for calculating the optical network unit according to the downlink training sequence carry table；

Sending module, downstream bits carrying table from the optical network unit to the optical line terminal and uplink for sending are trained Sequence, so that the upstream bits that the optical line terminal calculates the optical network unit according to the uplink training sequence carry table And calculated simultaneously according to the upstream bits carrying meter of the downstream bits of optical network unit carrying table and the optical network unit Update system descending bit carrying table and system uplink bit carrying table；

Sending module, is additionally operable to send the first ranging response message to the optical line terminal, so that the optical line terminal obtains Obtain the first measurement result；

Update module, for receiving and updating the system descending bit carrying table and the system that the optical line terminal is sent Upstream bits of uniting carrying table；

The receiving module, is additionally operable to receive the second distance measurement request message that the optical line terminal is sent；

The sending module, is additionally operable to send the second ranging response message to the optical line terminal, so that the optical link is whole End obtains the second distance measurement result.
14. optical network unit according to claim 13, it is characterised in that the computing module, specifically for according to institute State the signal-to-noise ratio that downlink training sequence calculates each downlink sub-carrier for receiving the downlink training sequence；According to the reception downlink The downstream bits carrying table of optical network unit described in the signal-to-noise ratio computation of each downlink sub-carrier of training sequence.
15. optical network unit according to claim 13, it is characterised in that the receiving module, is additionally operable to described in reception The second distance measurement request message that optical line terminal is sent；

The sending module, is additionally operable to send second of ranging response message to the optical line terminal, so that the optical link Terminal obtains the second distance measurement result.
16. according to claim 13~15 any one of them optical network unit, it is characterised in that the receiving module, is also used The login request message for giving tacit consent to downstream bits carrying table transmission is used in receiving the optical line terminal；

The sending module, is also used for default upstream bit carrying table and sends registration reply message, the registration response disappears Breath includes the sequence number of the optical network unit；

The receiving module, is additionally operable to receive the optical network unit marks that the optical line terminal is sent, the optical network unit Being identified as the optical line terminal determines the optical network unit of the sequence number representative by being the sequence number generation after certification The optical network unit distribution of table.
A kind of 17. orthogonal frequency division multiplexing passive optical network system, it is characterised in that including：

Such as claim 9~12 any one of them optical line terminal；

At least one such as claim 13~16 any one of them optical network unit；

Optical Distribution Network.