CN105981313A - Communication method, communication apparatus, and communication system - Google Patents

Abstract

Provided in the embodiments of the present invention are a communication method, a communication apparatus, a communication system, a computer-readable medium, and a corresponding frame structure; by means of a parent frame that can be recognized by an OLT and each ONU, corresponding different PON protocol sub-frames are encapsulated, such that a PON may simultaneously support different PON protocols.

Description

Communication method, communication apparatus, and communication system

A kind of communication means, communicator and communication system application claims Application No. PCT/CN2014/ 073659, the applying date is on March 19th, 2014, a kind of priority of the first application for a patent for invention of entitled " method communicated applied to EPON P0N, apparatus and system ".The full content of priority document is incorporated into the present invention.

Technical field

The present invention relates to technical field of network communication, specifically related to a kind of method applied to passive optical network PON, apparatus and system.Background technology

EPON（Passive Optical Network, PON) optical line terminal by office side（Optical Line Terminal, OLT), the optical network unit of user side（Optical Network Unit, ONU) or ONT Optical Network Terminal（Optical Network Terminal, ONT) and Optical Distribution Network（Optical Distribute Network, ODN) composition.At present, representative PON technologies are GPON (Gigabit-Capable Passive Optical Network, Gigabit Passive Optical Network）, EPON (Ethernet Passive Optical Network, Ethernet passive optical network), 10G-GPON (being referred to as XG-PON), 10G-EPON.

OLT provides Network Side Interface for PON system, connects one or more ODN.ONU provides user side interface for PON system, is connected with ODN.If ONU directly provides User Port Function, such as PC（Personal Computer, PC) online ethernet user port, then referred to as ONT.Without specified otherwise, the ONU systems being mentioned below refer to ONU and ONT.The network that ODN is made up of optical fiber and passive optical splitters part, for connecting OLT device and ONU equipment, for distributing or being multiplexed the data-signal between OLT and ONU.It is referred to as descending from OLT to ONU in PON system；Conversely, to be up from ONU to OLT.

With the evolution of PON technologies, the continuous upgrading of technology, same PON supports different PON agreements have been increasingly becoming more and more urgent demand.However, as shown in figure 1, in existing PON frameworks, OLT and each ONU only support same agreement.Therefore, how a kind of PON that various protocols can be supported to be communicated simultaneously is provided, becomes current urgent problem to be solved.The content of the invention

In view of this, the embodiment of the present invention provides a kind of communication means and communicator.

In a first aspect, the embodiment of the present invention provides a kind of method of communication, applied in passive optical network PON, the PON includes optical line terminal OLT and multiple optical network unit ONUs, characterized in that, the OLT supports a variety of PON protocol types, methods described includes：The female frame of generation, wherein, the configured information of the first subframe and at least a portion of first subframe are encapsulated in female frame, the configured information of first subframe includes the PON protocol type informations of first subframe；Send female frame.

Second aspect, the embodiment of the present invention also provides a kind of method of communication, applied in passive optical network PON, the PON includes optical line terminal OLT and multiple optical network unit ONUs, characterized in that, the OLT supports a variety of PON protocol types, methods described includes：Receive in female frame, female frame and encapsulate the configured information of subframe and at least a portion of the subframe, the configured information of the subframe includes the PON protocol type informations of the subframe；Parse female frame；PON protocol types according to indicated by the configured information of the subframe are handled the subframe in female frame.

The third aspect, the embodiment of the present invention provides a kind of communicator, it is characterised in that the communicator includes：Processing module, for generating female frame, wherein, the configured information of the first subframe and at least a portion of first subframe are encapsulated in female frame, the configured information of first subframe includes the PON protocol type informations of first subframe；Sending module, for sending female frame.

Fourth aspect, the embodiment of the present invention provides a kind of communicator, it is characterised in that described Communicator includes：Receiving module, the configured information of subframe and at least a portion of the subframe are encapsulated for receiving in female frame, female frame, the configured information of the subframe includes the PON protocol type informations of the subframe；Processing module, for parsing female frame, and PON protocol types according to indicated by the configured information of the subframe are handled the subframe in female frame.

Communication means and communicator provided in an embodiment of the present invention, the female frame that can be recognized by an OLT and each ONU encapsulate the subframe of corresponding different PON agreements so that a PON can support different PON agreements simultaneously.Brief description of the drawings is in order to illustrate more clearly of embodiments of the invention or technical scheme of the prior art, and used accompanying drawing is briefly described when below will be to description background technology and embodiment.Apparently, described in accompanying drawings below is only a part of embodiment of the present invention, for those of ordinary skill in the art, on the premise of not paying creative work, other accompanying drawings or embodiment can also be obtained according to these accompanying drawings and description, and it is contemplated that covering all these derivative accompanying drawings or embodiment.

Fig. 1 is PON configuration diagram；

Fig. 2 is a kind of apparatus module structure chart applied to passive optical network PON that the embodiment of the present invention one is provided；

Fig. 3 is that the embodiment of the present invention two provides a kind of structural representation of optical line terminal OLT；Fig. 4 is a kind of structural representation for passive optical network PON that the embodiment of the present invention three is provided;Fig. 5 is a kind of ONU structural representations that the embodiment of the present invention three is provided；

Fig. 6 is the structural representation for another ONU that the embodiment of the present invention three is provided；Fig. 7 is a kind of communication means flow chart applied to PON that the embodiment of the present invention four is provided;Fig. 8 is a kind of method flow diagram for ONU registrations that the embodiment of the present invention five is provided；Fig. 9 a are the method flow diagrams for another ONU registrations that the embodiment of the present invention five is provided； Fig. 9 b are a kind of interaction schematic diagrames for ONU registrations that the embodiment of the present invention five is provided；Fig. 9 c are another ONU registration interaction schematic diagrames that the embodiment of the present invention five is provided；Fig. 9 d are another ONU registration interaction schematic diagrames that the embodiment of the present invention five is provided；Figure 10 is a kind of structural representation for optical line terminal OLT that the embodiment of the present invention six is provided；

Figure 11 is a kind of structural representation for optical line terminal OLT that the embodiment of the present invention seven is provided；

Figure 12 is a kind of schematic diagram for frame structure that the embodiment of the present invention eight is provided；

Figure 13 is a kind of structural representation for PON system that the embodiment of the present invention eight is provided.Embodiment

In order to make the purpose , technical scheme and advantage of the present invention be clearer, below in conjunction with drawings and Examples, the present invention will be described in further detail.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.Obviously, described embodiment is only a part of embodiment of the invention, rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made belongs to the scope of protection of the invention.

Embodiment one

Orthogonal frequency division multiplexing passive optical network (Orthogonal Frequency Division Multiplexing, OFDM-PON) is a kind of EPON based on OFDM technology.OFDM technology belongs to multi-carrier modulation technology, and its basic thought is the subchannel that channel is divided into some frequency orthogonals, and high-speed data signal is converted into parallel low speed sub-data flow, is modulated on each subchannel and is transmitted.In OFDM-PON systems, uplink and downlink direction only has 1 wavelength.In down direction, OLT MAC (Media Access Control, medium education）Module, for realizing ONU management, DBA (Dynamic Bandwidth Allocation, Dynamic Bandwidth Allocation）, ONU registrations activation, the function such as data transmit-receive；Physics Layer includes PMD (Physical Medium Dependent, physical medium associated layers）, DAC (Digital-to-Analog Converter, digital analog converter）ADC (Analog-to-Digital Converter, analog-digital converter）, optical sender, the hardware device such as photoreceiver, wherein, the data that PMD modules are used to export MAC module are modulated into ofdm signal, DAC is used for the electric signal that the ofdm signal of numeric field is converted to simulation, optical sender Tx is used to convert electrical signals to optical signal, is transmitted into Optical Distribution Network ODN.Optical signal is through ODN network transmissions to ONU, ONU photoreceiver Rx is used to receive optical signal, and convert optical signals to electric signal, analog-digital converter ADC is used to analog electrical signal being converted to data signal, the demodulation of ofdm signal is realized by PMD modules, the signal after demodulation is transmitted to MAC module and handled.In up direction, ONU MAC module is used to realizing the functions such as ONU management, DBA, data transfer, and the function of the module such as PMD, DAC, Tx, Rx, ADC is similar with introducing for down direction, repeats no more.

As shown in Figure 2 a and 2 b, the embodiment of the present invention discloses a kind of device 200 applied to passive optical network PON, the PON includes optical line terminal OLT and multiple optical network unit ONUs, data are carried based on orthogonal frequency division multiplex OFDM between the OLT and the multiple ONU, described device includes：

Multiple PON media access control MACs modules, for coupling the physical layer block based on OFDM；

The multiple PON media access control MACs module includes the first PON MAC modules and the 2nd PON MAC modules, the PON types that the first PON MAC modules and the 2nd PON MAC modules are supported are different, and the PON types include MAC protocol and at least one of PON link rates；

The first PON MAC modules are associated with the first OFDM subchannels that the physical layer block based on OFDM is supported；

The 2nd PON MAC modules are associated with the 2nd OFDM subchannels that the physical layer block based on OFDM is supported, wherein, the OFDM subcarriers that the 2nd OFDM subchannels are included are different with the OFDM subcarriers that the first OFDM subchannels are included. Alternatively, the MAC protocol includes GPON agreements, EPON agreements, 10G-GPON agreements, 10G-EPON agreements, or the MAC protocol of the higher transfer rate such as 40G-PON, 100G-PON, or Ethernet protocol, CPRI (Common Public Radio Interface, public wireless electrical interface）, OBSAI (Open Base Station Architecture Initiative, open base station architecture agreement）Etc. one kind in MAC protocol.

Alternatively, the first PON MAC modules and the 2nd PON MAC modules can be integrated.

Alternatively, the first OFDM subchannels and the 2nd OFDM subchannels are divided down going channel by subcarrier grouping.Such as, descending ofdm signal has 1024 subcarriers, and H is not divided into 4 subchannels, and each subchannel takes 256 subcarriers, and the ID of subchannel is respectively 0 ~ 3.

Alternatively, the first OFDM subchannels and the 2nd OFDM subchannels are to divide down going channel by the frequency spectrum of descending ofdm signal.Such as, the frequency spectrum of descending ofdm signal is 1GHz, it is assumed that be divided into 4 subchannels, and each subchannel takes 250MHz frequency spectrum resource, and the ID of subchannel is respectively 0 ~ 3.

Alternatively, described device also includes parameter interface module, for transmitting OFDM sub-channel informations between the first ONU in OLT and the multiple ONU.Wherein, the OFDM sub-channel informations include the channel information that the OLT distributes to the first ONU the first OFDM subchannels, and the PON types that the first ONU is supported are consistent with the PON types for the first PON MAC modules that the first OFDM subchannels are associated.For example, such as the first PON MAC modules support GPON agreements, the first OFDM subchannels to support GPON agreements, first ONU corresponding with the first OFDM subchannels to support GPON agreements；2nd PON MAC modules support EPON agreements, the 2nd OFDM subchannels to support EPON agreements, twoth ONU corresponding with the subchannel to support EPON agreements.

Described device also includes：During any one condition below satisfaction, the first OFDM subchannels of distribution give the first ONU, and the condition includes：

Spectral range and the spectral range of the first OFDM subchannels that first ONU is supported Match somebody with somebody；The PON types that first ONU is supported are consistent with the PON types for the first PON MAC modules that the first OFDM subchannels are associated；And the first OFDM subchannels bandwidth capacity meet the first ONU bandwidth demand.

Optionally, the parameter interface module is used for the channel information that multiple OFDM subchannels that the physical layer block based on OFDM is supported are transmitted by the physical layer negotiation process.

Wherein, the OFDM sub-channel informations include at least one of OFDM gap markers and OFDM subcarrier informations.

Alternatively, described device also includes management module, and the incidence relation for setting up ONU and OFDM subchannels includes the incidence relation of the first ONU and the first OFDM subchannels.The incidence relation illustrates the relation of the channel information of ONU marks and OFDM subchannels.

Alternatively, the first OFDM subchannels and the 2nd OFDM subchannels are descending subchannel.

Alternatively, the first OFDM subchannels and the 2nd OFDM subchannels are respectively upgoing O FDM subchannels and descending OFDM subchannels, or respectively descending OFDM subchannels and upgoing O FDM subchannels.

Alternatively, the multiple PON media access control MACs module is a part of component of the OLT.

The first PON MAC modules or the 2nd PON MAC modules, can use field programmable gate array（Field-Programmable Gate Array, FPGA), special integrated chip (Application Specific Integrated Circuit, ASIC) can be used, System on Chip/SoC can also be used（System on Chip, SoC), central processing unit can also be used（Central Processor Unit, CPU), network processing unit can also be used（Network Processor, NP), digital signal processing circuit can also be used（Digital Signal Processor, DSP), microcontroller can also be used（Micro Controller Unit, MCU), programmable controller can also be used（Programmable Logic Device, PLD) or other integrated chips.

Embodiment two

The embodiment of the present invention discloses a kind of optical line terminal OLT, as shown in figure 3, applied to nothing Source optical-fiber network PON, the PON includes the OLT and multiple optical network unit ONUs, data are carried based on orthogonal frequency division multiplex OFDM between the OLT and the multiple ONU, the OLT includes multiple PON MAC modules and the physical layer block based on OFDM.

Wherein, the PON MAC modules include the device as described in embodiment one；The multiple PON MAC modules are coupled to the physical layer block based on OFDM, and the physical layer block based on OFDM is used for the data that the first PON MAC modules are transmitted by the first OFDM subchannels；The data of the 2nd PON MAC modules are transmitted by the 2nd OFDM subchannels.

Specifically, physical layer block includes：

Physical medium associates PMD modules, for down direction, the data of the first PON MAC modules is received by the first OFDM subchannels, and be modulated to ofdm signal；The data of the 2nd PON MAC modules are received by the 2nd OFDM subchannels, and are modulated to ofdm signal；Up direction, receives the digital base band OFDM signal that analog-digital converter is sent, and demodulate the manageable data-signals of MAC.

What deserves to be explained is, in OFDM-PON, the up use time division multiple acesses of ONU（Time Division Multiplexing Access, TDMA) mode transmit data.OLT can distribute a small amount of bandwidth and report its bandwidth demand for ONU, and such as its data Slow to be sent rushes the length or size in area, and OLT receives rear accounting point counting dispensing ONU bandwidth authorizing size, and with bandwidth allocation bitmap（Bandwidth Map, BWmap) or other forms issue ONU, authorization by direction to the ONU ascending time slot at the beginning of between and length information, after ONU receives BWmap, it is luminous in corresponding ascending time slot according to BWmap timing, upstream data is sent to OLT.

Wherein, the PON MAC modules, support the ONU of same MAC protocol to distribute BWmap for giving PON MAC respectively.The MAC module of GPON agreements is such as supported to the ONU distribution BWmap for supporting GPON agreements, to support the MAC module of EPON agreements to the ONU distribution BWmap for supporting EPON agreements.

Digital analog converter, for the ofdm signal to be converted into analog electrical signal； Optical sender, for the analog electrical signal to be converted into optical signal, by the optical signal launch to Optical Distribution Network ODN.

MAC adaptation modules, one end is coupling in each described PON MAC module, and one end is coupling in the PMD modules, and for the first OFDM subchannels to be associated with into the first PON MAC modules, the 2nd OFDM subchannels are associated with the 2nd PON MAC modules；When receiving uplink optical signal, according to B Wmap, determine that the moment sends the PON MAC modules corresponding to the ONU of signal, the data-signal that PMD modules are demodulated is sent to the corresponding PON MAC modules.

The physical layer block also includes analog-digital converter and photoreceiver, wherein, photoreceiver is used to receive the uplink optical signal sent from ONU, and converts optical signals to analog electrical signal；Analog-digital converter is used to the analog electrical signal being converted to data signal, sends to PMD modules.

Embodiment three

The embodiment of the invention discloses a kind of passive optical network PON, as shown in Figure 4, including OLT and multiple ONU, data are carried based on orthogonal frequency division multiplex OFDM between the OLT and the ONU, the OLT can support a variety of MAC protocols, such as GPON, EPON, 10G-GPON or 10G-EPON, and the higher rate of future development 40G-PON, 100G-PON agreement, or one or more in the MAC protocol such as Ethernet protocol, CPRI agreements, OBSAI.Correspondingly, the multiple ONU is supported in a kind of agreement in the agreements such as GPON, EPON, 10G-GPON or 10G-EPON, Ethernet protocol, CPRI agreements, OBSAI, the PON system, at least in the presence of two kinds of MAC protocols.

In the PON system described in Fig. 4, down going channel is divided into multiple subchannels by the frequency spectrum of downstream analog ofdm signal or by subcarrier, by taking 1GHz as an example, is divided into 4 subchannels, each subchannel takes 250MHz frequency spectrum resource, and the ID of subchannel can be 0 ~ 3.

Preferably, the close ONU of to-noise ratio SNR can be assigned to same subchannel, the requirement modulation downstream signal that the subchannel where ONU higher SNR can be higher, so as to improve the total bandwidth of down going channel.

Alternatively, GPON or EPON ONU can select to support 250MHz low frequency analog device and optical device, and OLT or 10G-GPON, 10G-EPON ONU can select to support The frequency analog device and optical device of 1GHz frequency spectrums.

The OLT, including the OLT as described in implementing two;

The multiple ONU, for receiving downlink optical signal from the ODN, and is transferred to OLT by upstream data in the way of time division multiple acess TDMA.

The ONU, is specifically included：

Photoreceiver, for receiving the optical signal of ODN transmission, and is converted to analog electrical signal；Analog-digital converter DAC, for analog electrical signal to be converted into digital baseband signal；

PMD modules, for digital baseband signal to be demodulated, form the manageable data-signal of MAC module；

MAC module, for receiving the data of PMD modules, and is handled.

It should be noted that OLT is converted to the signal of frequency domain the signal of time domain when modulating ofdm signal；When ONU is received, demodulated ofdm signal is converted to time-domain signal the signal of frequency domain.

Specifically, ONU hardware configuration has two kinds of embodiment schemes, as shown in Figure 5, the first, using the scheme directly detected, the ofdm signal of ONU fixed reception downstream spectrums, it can be used for EPON, GPON, 10G-GPON, 10G-EPON implementation.

Second, using the scheme of electrical domain coherent reception, as shown in fig. 6, regulation local oscillator（Local Oscillator, LO) frequency align downlink frequency language centre frequency, the ofdm signal of the centre frequency subchannel consistent with the centre frequency can be received, can be used for EPON, GPON ONU implementations.

It should be noted that OLT needs to transmit the information of the corresponding subchannels of the first ONU in advance, the mark ID or the frequency range of subchannel of such as subchannel, in order to which LO frequency can be adjusted to the subchannel by the first ONU, receive signal.Described informing in advance can be sent the incidence relation information of ONU and subchannel to ONU by message, can also be local to ONU by the incidence relation information configuration, can also here be repeated no more using other modes in the prior art.

Direct detection scheme and electrical domain coherent reception scheme are prior art, and here is omitted. It is clear to describe, such as the ONU for supporting GPON is referred to as the first ONU, the ONU for supporting EPON is referred to as the 2nd ONU, support 10G-GPON ONU to be referred to as the 3rd ONU.

Ofdm signal is received using the first the first ONU directly detected, corresponding MAC data-signal is demodulated and extract.According to embodiment one, the first PON MAC modules are associated with the first OFDM subchannels, and the first MAC protocol is GPON agreements, then the 0NU receives the data-signal of the first subchannel, i.e. the first subchannel and GPON protocol bindings.

Using the first 0NU of second of electrical domain coherent reception, regulation L0 frequency is alignd with the centre frequency of downstream spectrum, the ofdm signal for the subchannel that can be alignd with fixed reception with the centre frequency, and demodulates data-signal.

Using the 3rd 0NU of the first scheme, in order to realize bigger bandwidth, it is necessary to support to receive and handle the ofdm signal of whole or multiple subchannels, i.e., multiple subchannels are bound into a down going channel.

Example IV

The embodiment of the present invention discloses a kind of communication means applied to PON, this method is applied to the PON system as described in embodiment three, as shown in Figure 7, the PON includes optical line terminal OLT and multiple optical network unit ONUs, data are carried based on orthogonal frequency division multiplex OFDM between the OLT and the multiple ONU, methods described includes：

The OLT sends the data message based on the first MAC protocol by the first descending subchannels of OFDM to the first ONU, the OLT sends the data message based on the second MAC protocol by the 2nd descending subchannels of OFDM to the 2nd ONU, wherein the OFDM subcarriers that the first OFDM subchannels are included are different with the subcarrier that the 2nd OFDM subchannels are included.

Alternatively, methods described also includes：

The OLT sends the first descending OFDM sub-channel informations that the OLT distributes to the first ONU to the first ONU.

Alternatively, methods described also includes：

The OLT is when in following condition, at least one meets, and the first OFDM subchannels of distribution are given First ONU:The spectral range that first ONU is supported is matched with the spectral range of the first OFDM subchannels；The PON types that first ONU is supported are consistent with the P0N types for the first PON MAC modules that the first OFDM subchannels are associated；And the first OFDM subchannels bandwidth capacity meet the first 0NU bandwidth demand.

Alternatively, methods described also includes：

The OFDM sub-channel informations include at least one of OFDM gap markers and OFDM subcarrier informations.

It should be noted that ONU is up by the way of time division multiple acess TDMA.Under implementation process：

The signal of frequency domain, by inverse Fourier transform method, is converted to time domain, is sent to ONU by OLT when doing OFDM modulation;

ONU receiving terminals, are to be received according to the subcarrier of different frequency according to time order and function order, by Fourier transformation method, time-domain signal are converted into frequency-region signal, and each ONU receives corresponding data from corresponding OFDM subchannels.When up, OLT is reported to according to time division multiple acess TDMA modes.

Up only one of which wavelength, the ONU of different MAC protocols accesses OLT in TDMA modes, and OLT PMD modules demodulation upgoing O FDM signals have two methods：One is according to BWmap (Bandwidth Ma, bandwidth allocation bitmap）Information switches demodulation parameter（Such as up B tables, equalizing coefficient table）, corresponding ONU upstream data is demodulated, PON MAC modules corresponding with the ONU are then forwarded to（Forwarding capability can also be realized by the MAC adaptation modules of MAC layer）；Two be the up use identical demodulation parameters of all ONU, demodulates upstream data, and according to BWmap information PON MAC modules corresponding with the ONU are forwarded in the MAC adaptation modules of MAC layer.

Specifically, BWmap includes the description information of ONU ascending time slots, and BWmap issues ONU by OLT, and OLT can also adjust pmd layer parameter in advance according to BWmap and carry out the preparation for receiving upstream data；In addition, can get corresponding ONU-ID by Alloc-ID, uplink data frames include ONU-ID, can compare after MAC receives upstream data ONU-ID fields, whether both are consistent for detection, can also compare the reception time of ONU upstream datas and whether the mandate time whether consistent timing to judge ONU in BWmap is normal.This scheme is prior art, is repeated no more here.

Embodiment five

Fig. 8 shows a kind of method flow diagram of ONU registrations provided in an embodiment of the present invention, and applied in PON, the PON includes optical line terminal OLT and multiple optical network unit ONUs;Data are carried based on orthogonal frequency division multiplex OFDM between the OLT and the multiple ONU, as shown in figure 8, methods described includes：

S800, the OLT send login request message by the first OFDM subchannels with the first MAC protocol；

S802, the OLT send login request message by the 2nd OFDM subchannels with the second MAC protocol, wherein, the OFDM subcarriers that the first OFDM subchannels are included are different with the OFDM subcarriers that the first OFDM subchannels are included；

S804, the OLT receives the registration request response message from ONU, to be judged as that legal ONU distribution ONU is identified and OFDM subchannels, the ONU marks of foundation distribution and associating for OFDM subchannels.OLT judges whether the ONU is legal ONU according to ONU sequence number.

Alternatively, methods described also includes：OLT sends the physical layer configuration parameter related to the first OFDM subchannels on the first OFDM subchannels with the first MAC protocol；

OLT sends the physical layer configuration parameter related to the 2nd OFDM subchannels on the 2nd OFDM subchannels with the second MAC protocol, wherein the physical layer configuration parameter includes at least one of OFDM gap markers and OFDM subcarrier informations.

Specifically, it is the ONU distribution OFDM subchannels, including：

When the spectral range that ONU types are supported and the first OFDM subchannels are mismatched；Or, ONU types are mismatched with the MAC protocol that the first OFDM subchannels are carried；Or, when the bandwidth capacity of the first OFDM subchannels fails to meet the first ONU bandwidth demand, the 3rd OFDM subchannels of distribution give the first ONU, wherein, the 3rd OFDM subchannels are expired It is enough one of lower condition：

The spectral range that first 0NU is supported is matched with the spectral range of the 3rd OFDM subchannels；The PON types that first ONU is supported are consistent with the PON types for the first PON MAC modules that the 3rd OFDM subchannels are associated；And the 3rd OFDM subchannels bandwidth capacity meet the first ONU bandwidth demand.

It should be noted that carrying ONU sequence number in ONU registration response request message, ONU type can also be carried；ONU can also individually report ONU types, ^ mouthfuls of physical layer operations management service (Physics Layer Operation Administration Management, PLOAM) message by other message.

It is that the ONU distributes the descending subchannels of the 3rd OFDM that methods described, which also includes the OLT, and when the 3rd OFDM subchannels are different from the first OFDM subchannels, the OLT carries out second of ranging to the ONU.

Wherein, the descending subchannel that ONU receives registration message is ONU oneself selections, is not OLT distribution.If the subchannel of ONU oneself selections meets the principle of OLT allocation of downlink subchannels, OLT formally distributes the subchannel to the ONU, otherwise distributes other descending subchannels to the ONU.

Further, the formal descending subchannel principle of OLT distribution has：Whether the PON protocol types of subchannel are consistent, whether the bandwidth capacity of subchannel meets ONU requirements, whether carrier ID is consistent（There is kind of a scene, descending subchannel and operator binding, the only ONU of the operator could be accessed）, between descending subchannel between the consideration of load balancing, subchannel flow scheduling consideration（Such as in order to save, ONU is concentrated on into the descending subchannel in part when ONU is less）Etc..

Methods described is also included after OLT is that the ONU distributes the 3rd OFDM subchannels, and the downstream bits carrying table of renewal is reported the OLT by the ONU.

It should be noted that OLT and ONU determines that the pmd layer running parameter of subchannel is realized by the bit carrying table B tables of acquiescence or the bit carrying table B tables of renewal.

The technology for giving tacit consent to B tables is prior art, refer to the related record of prior art, here Repeat no more.

The ONU reports the downstream bits carrying table of renewal before the OLT, in addition to:

ONU;The ONU receives the descending training sequence by the descending subchannels of the 3rd OFDM, and calculates the downstream bits carrying table for generating the renewal；The downstream bits carrying table of the renewal is sent to the OLT by the ONU.

Methods described is also included after OLT is that the ONU distributes the 3rd OFDM subchannels, and the upstream bits carrying table of renewal is sent to the ONU by the OLT.

The upstream bits carrying table of renewal is sent to before the ONU by the OLT, in addition to:The ONU sends up training sequence to the OLT;The OLT receives the up training sequence by the OFDM data feedback channels, and calculates the upstream bits carrying table for generating the renewal；The upstream bits carrying table of the renewal is sent to the ONU by the OLT by the descending OFDM subchannels.

Methods described also includes the OLT and carries out third time ranging to the ONU.

With reference to specific application scenarios, the embodiment of the present invention is further described, Fig. 9 a are a kind of ONU register methods flow charts provided in an embodiment of the present invention, Fig. 9 b, 9c, 9d are a kind of ONU register flow paths interaction figures provided in an embodiment of the present invention, as shown in Fig. 9 a, 9b, 9c, 9d.

In the PON, the optical network unit ONU that optical line terminal OLT passes through the multiple different EPON MAC protocols of Optical Distribution Network ODN connections, mapping relation information of the optical line terminal OLT provided with M descending subchannels with N kind MAC protocols, wherein, M, N are the integer more than or equal to 1.It is described to be provided with, can be that the mapping relation information is stored in OLT memory RAM or ROM, flash memory, register etc., it can also be and directly write the mapping relation information in chip, it can also be by configuration order row or network management system, be arranged on by the way of outside input on the OLT.

S900, OLT obtain each descending subchannel and the corresponding relation of MAC protocol, wherein, the first subchannel is corresponding with the first MAC protocol. Wherein, the M descending subchannels and the mapping relation information of MAC protocol, can be with as shown in table 1 below：

The mapping table of the descending subchannel of table 1 and MAC protocol

As shown in table 1, subchannels and GPON agreement of the ID for 0 --- it is corresponding, subchannels and EPON agreement of the ID for 1 --- corresponding, subchannels and 10G-GPON agreement of the ID for 2 --- corresponding, subchannels and 10G-EPON agreement of the ID for 3 --- it is corresponding.

Further, the M descending subchannels can be the frequency i ridges according to descending ofdm signal, multiple subchannels that down going channel is divided into.In the present embodiment, so that the frequency spectrum of ofdm signal is 1GHz as an example, it is assumed that be classified as 4 subchannels（It is of course also possible to be divided into other multiple subchannels）, each subchannel takes 250MHz frequency spectrum resource, and the ID of 4 subchannels is respectively set to 0 ~ 3.

Further, it is assumed that 1GHz frequency spectrum can support lOGbps message transmission rate.For GPON, usual downlink transmission data rate is 2.5Gbps, and higher uplink bit rate is 1.25Gbps.For EPON, usual uplink and downlink message transmission rate is 1.25Gbps, so G/E-PON (being referred to as GPON and EPON) only need to take less frequency spectrum resource, it is assumed that the frequency spectrum for being G/E-PON distribution is 250MHz.For 10G-GPON, usual downlink transmission data rate is lOGbps, and higher uplink bit rate is 2.5Gbps.Asymmetrical 10G-EPON, downlink transmission data rate is lOGbps, higher uplink bit rate is 1.25Gbps, therefore the descending of 10G-PON (being referred to as descending lOGbps PON, including 10G-GPON and 10G-EPON) needs 1GHz frequency spectrum.

Further, the M descending subchannels can according to the frequency spectrum of descending ofdm signal, Down going channel is divided into multiple subchannels.In the present embodiment, so that the frequency spectrum of ofdm signal is 1GHz as an example, 4 Jia, which are set, is classified as 4 subchannels（It is of course also possible to be divided into other multiple subchannels）, the ID of 4 subchannels is respectively set to 0 ~ 3.

OLT and 10G-PON ONU needs the frequency analog device and optical device for selecting to support 1 GHz frequency spectrums, and the analog device includes digital analog converter DAC and analog-digital converter ADC etc.；The optical device includes optical sender and photoreceiver.G/E-PON ONU can also use such ONU, and the subchannel of respective bandwidth is then distributed for it.

Preferably, according to above-mentioned downstream spectrum demand, G/E-PON ONU can select to support the low frequency analog device and optical device of 250MHz frequency spectrums.For the ONU of the first scheme, the analog device includes low pass electrical filter and analog-digital converter ADC, digital analog converter DAC etc.；For the ONU of second scheme, the analog device includes band logical electrical filter, local oscillator LO, analog-digital converter ADC or IQ demodulator（In-phase and Quadrature Modulator), digital analog converter DAC;The optical device includes photoreceiver.

It is apparent that using preferred scheme, G/E-PON ONU costs can accomplish that the cost of the ONU than 10G-PON is lower, therefore, different PON ONU selects suitable analog device and optical device, can be effectively reduced cost.

Step S901：The OLT sends login request message by the first OFDM subchannels with the first MAC protocol；

It is that the first MAC protocol is illustrated by 0 corresponding GPON agreements of the subchannel ID in table 1 for ease of understanding.OLT, according to the mapping relation information, the first ONU login request messages is issued to the-ONU by ID by reading the mapping relation information in table 1 for 0 subchannel;Wherein, the first ONU is the ONU for supporting GPON agreements.

Specifically, the frame format of the first ONU login request messages, can be using in GPON systems in the prior art, and OLT issues the frame format of ONU login request messages, can also use other customized frame formats.On GPON systems in the prior art, ONU login request messages frame format is prior art, is repeated no more here.

Further, OLT starts ONU registration processes in periodicity, with the first MAC protocol , can also be by the first subchannel of the M subchannel before sending login request message, the physical layer parameter needed for issuing the first ONU normal works by giving tacit consent to downstream bits carrying table describes message, in the quiet window of data feedback channel unlatching.

Step 902:The OLT sends login request message by the 2nd OFDM subchannels with the second MAC protocol；

It is that the second MAC protocol is illustrated by 1 corresponding EPON agreements of the subchannel ID in table 1 for ease of understanding.OLT, according to the mapping relation information, the 2nd ONU login request messages to the 2nd ONU is issued by ID by reading the mapping relation information in table 1 for 1 subchannel;Wherein, the 2nd ONU is the ONU for supporting EPON agreements.

Specifically, the frame format of the 2nd ONU login request messages, can be using in EPON system in the prior art, and OLT issues the frame format of ONU login request messages, can also use other customized frame formats.On EPON system in the prior art, ONU login request messages frame format is prior art, is repeated no more here.

Further, OLT starts ONU registration processes in periodicity, by before giving tacit consent to downstream bits carrying table with the second MAC protocol transmission login request message, can also be by the second subchannel of the M subchannel, physical layer parameter needed for issuing the 2nd ONU normal works describes message, and quiet window is opened in data feedback channel.

As shown in 9b, wherein, on first ONU (being GPON ONU in figure) after electricity, table scan its each descending subchannel that can support is carried by giving tacit consent to downstream bits, if can reach on descending subchannel of one of which synchronous and correctly parse downlink frame, the MAC protocol that descending subchannel shown in then illustrating is supported is consistent with the MAC protocol that the ONU is supported, the ONU can regard the descending subchannel as interim descending subchannel and renewal of registration flow, the interim descending subchannel is only used for registration, business datum can not be transmitted.As shown in figure 9b, GPON ONU selections receive downlink frame and synchronous on subchannel 0.

Alternatively, physical layer parameter needed for OLT issues the first ONU normal works in step 900 describes message to the first ONU, first ONU receives the physical layer parameter and described after message, and describing message according to the parameter is configured, and then receives the first ONU registration requests and disappears Breath, and the first ONU login request messages are responded, report sequence number SN.

Wherein, the physical layer parameter includes centre frequency and sub-carrier number, uplink transmission power, acquiescence modulation format, preamble length and pattern of descending subchannel etc..

Alternatively, the first ONU can also report ONU types to OLT, it is described report ONU types can by the blunt sequence number SN message of upper ^, together on can individually be reported with a self-defined new message format.

The ONU types can be ONU hardware parameter information, ONU type coding or ONU equipment other specification, and the OLT can know the information such as the frequency, uplink and downlink speed, MAC protocol, the bandwidth of support of ONU supports according to the ONU types.

Alternatively, if the first ONU does not report ONU types to OLT, OLT can obtain the information such as the frequency that the first ONU be supported, uplink and downlink transmission rate, MAC protocol, the bandwidth supported according to the sequence number SN.

Step 903：The OLT receives the registration request response message from ONU, judges whether the ONU is legal, is ONU distribution ONU marks if legal（It is referred to as ONU-ID), ranging is carried out to the ONU, is the formal descending subchannel of ONU distribution, associating for ONU marks and the descending subchannel is set up.The formal descending subchannel can be not only used for registration, can also transmit business datum.

Alternatively, OLT records subchannel ID, ONU-ID with supporting the mapping relation information of MAC protocol, and the table 1 after renewal is（It is empty, the state after all distribution ONU-ID is shown in table 1 now in the row of ONU marks one if EPON, 10G-EPON, 10G-GPON ONU do not distribute ONU-ID also）：

The mapping table of descending subchannel and MAC protocol

10G-EPON ONU-ID=4

OLT manages message by physical layer operations（Physical Layer Operation And Management,) or other customized broadcast messages PLOAM, physical layer parameter needed for issuing the 2nd ONU normal works describes message to the 2nd ONU, on 2nd ONU after electricity, receive the physical layer parameter to describe after message, describing message according to the parameter carries out initial configuration, then receives the 2nd ONU login request messages, and the 2nd ONU login request messages are responded, report sequence number SN.

Alternatively, the 2nd ONU can also report ONU types to OLT, it is described report ONU types can by the blunt sequence number SN message of upper ^, together on can individually be reported with a self-defined new message format.The ONU types can be ONU hardware parameter information, ONU type coding or ONU equipment other specification, and the OLT can know the information such as the frequency, uplink and downlink speed, MAC protocol, the bandwidth of support of ONU supports according to the ONU types.

Alternatively, if the 2nd ONU does not report ONU types to OLT, OLT can obtain the information such as the frequency that the 2nd ONU be supported, up, downlink transmission rate, MAC protocol, the bandwidth supported according to the sequence number SN.

Specifically, OLT is received after the response message of the first ONU login request messages from the first ONU, verify whether the sequence number SN that the first ONU is reported is legal, if legal, then OLT is that the first ONU distributes the first ONU-ID, and the first ONU-ID is handed down into the first ONU;If illegal, the first ONU is kicked offline by OLT.

With reference to table 1, illustrate, OLT receives the SN reported come the ONU of self-supporting GPON agreements by ID for 0 subchannel, after verifying that the SN is legal, the ONU-ID that ONU-ID is 1 is distributed to the ONU of support GPON agreements, conversely, verifying that the SN is illegal, then the ONU is kicked offline. Wherein, whether be legal ONU, can according in the prior art, by report it is that SN prestores with OLT or pre-configured or inputted by order line or the SN that is inputted by network management system matched, if matching is consistent, the ONU is legal ONU;Conversely, being illegal ONU.

After OLT is proved to be successful to the SN that ONU is reported, OLT initiates first time ranging, and ranging is completed under ONU cooperation.

OLT is the formal descending subchannel of ONU distribution, and descending subchannel ID is sent to ONU.

Wherein, if the interim subchannel that ONU is currently selected meets one of following condition, OLT is that ONU distributes another descending subchannel as formal subchannel；Otherwise, OLT is using the interim subchannel as formally descending subchannel assignment is to ONU, and the condition is：

The spectral range that ONU types are supported is mismatched with current interim subchannel；Or, ONU types and the MAC protocol of current interim subchannel carrying are mismatched；Or, the bandwidth capacity of current subchannel does not meet ONU bandwidth demand.

Wherein, OLT is that ONU distributes another descending subchannel as formal subchannel, is specifically included：

OLT will meet first OFDM subchannel assignment of ONU demands to ONU;Or, OLT by meet in multiple OFDM subchannels of ONU demands any one distribute to ONU;Or, OLT will meet an optimal OFDM subchannel assignments for ONU demands to ONU;Or OLT binds multiple descending OFDM subchannel assignments to ONU.

As shown in figure 9b, current interim subchannel meets GPON ONU demand, OLT by subchannel ID for 0 subchannel assignment to ONU.As is shown in fig. 9 c, current interim subchannel is unsatisfactory for GPON ONU demand, OLT by subchannel ID for 3 subchannel assignment to ONU.As shown in figure 9d, XG-PON ONU is larger to the bandwidth demand of subchannel, ONU is synchronous on subchannel 1 and 2, when this two interim subchannels meet XG-PON ONU demands, after OLT binds subchannel ID for 1 and 2 subchannel, XG-PON ONU are given as formal descending subchannel assignment Step 904:When the descending subchannels of ONU change, OLT initiates second of ranging.Specifically, OLT is that ONU has redistributed descending subchannel in step 904, the formal descending subchannel of the distribution may be different from subchannel ID interim before, therefore, when the descending subchannels of ONU change, OLT needs second of ranging, or by calculating the distance measurement result for obtaining the ONU on new descending subchannel, by identical ONU the distribution descending subchannel and current subchannel distance measurement result difference come the distance measurement result of ONU as described in calculating;Conversely, OLT does not need second of ranging.

Step 905:After the descending subchannels of ONU change, OLT and ONU are it needs to be determined that the pmd layer running parameter of subchannel.

Usually, in OFDM-PON, OLT and ONU carry table B tables in registration process using the bit of acquiescence（Alternatively referred to as bit map）Communicated, and then determine PMD layers of running parameter.Ofdm signal has multiple subcarriers in frequency domain, and each subcarrier is according to signal to noise ratio（Signal Noise Ratio, SNR) characteristic, each clock can carry different bit numbers, i.e. B values, and the B tables are the mapping tables of passage sub-carriers ID and B value.

Alternatively, the method that OLT and ONU determine descending B tables：OLT sends descending training sequence and the signal to noise ratio of each subcarrier is calculated according to the descending training sequence of reception to ONU, ONU（Signal Noise Ratio, SNR), further according to the SNR, calculate the descending B tables of the ONU.The descending B tables calculated are reported to OLT by ONU, and OLT is configured according to the descending B tables.

Alternatively, the method that OLT and ONU determine up B tables：ONU sends up training sequence and the signal to noise ratio (Signal Noise Ratio, SNR) of each subcarrier is calculated according to the up training sequence of reception, further according to the SNR, the up B tables of the OLT are calculated to OLT, OLT.The up B tables calculated are sent to ONU, ONU and configured according to the up B values by OLT.

After one section of time delay, OLT and ONU synchronized update uplink and downlink B tables.One section of time delay, can be pre-configured with or set, can also set in real time.

Step 906:OLT and ONU needs ranging again after uplink and downlink B tables are updated, i.e., Third time ranging.

The third time ranging is identical with first time, second of ranging process, repeats no more here.

OLT and ONU enter normal communication state.

Embodiment six

The embodiment of the invention discloses a kind of optical line terminal OLT, as shown in Figure 10, the OLT includes：

Memory 100, the corresponding relation for preserving each descending subchannel and MAC protocol, wherein, the first subchannel is corresponding with the first MAC protocol；

First MAC module 101, for sending login request message by the first OFDM subchannels with the first MAC protocol；The registration request response message from the first ONU is received, judges whether the first ONU is legal, is the first ONU distribution ONU marks if legal；Associating for ONU mark and OFDM subchannels is set up, to the first ONU progress rangings；Formal descending subchannel is distributed for the first ONU；

Alternatively, the first MAC module 101, is additionally operable to send the physical layer configuration parameter related to the first OFDM subchannels with the first MAC protocol by the first OFDM subchannels.

Alternatively, first MAC module 101, for distributing formal descending subchannel for the first ONU, is specifically included：

The spectral range and current interim subchannel supported when ONU types（Current interim subchannel is the first OFDM subchannels）Mismatch；Or, ONU types and the MAC protocol of current interim subchannel carrying are mismatched；Or, when the bandwidth capacity of current interim subchannel fails the bandwidth demand for meeting ONU, the 3rd OFDM subchannels of distribution give the first ONU;Now, the 3rd OFDM subchannels meet following condition：

The spectral range that first ONU is supported is matched with the spectral range of the 3rd OFDM subchannels；The PON types that first ONU is supported are consistent with the PON types for the first PON MAC modules that the 3rd OFDM subchannels are associated；And the 3rd OFDM subchannels bandwidth capacity meet the first ONU bandwidth demand.

When there are multiple OFDM subchannels and can meet conditions above, OLT distribution subchannels Principle can be：

OLT will meet first OFDM subchannel assignment of ONU demands to ONU;Or, 0LT by meet in multiple OFDM subchannels of 0NU demands any one distribute to ONU;Or, OLT will meet an optimal OFDM subchannel assignments for ONU demands to ONU;Or OLT binds multiple descending OFDM subchannel assignments to ONU.

Alternatively, first MAC module 101, is additionally operable to when OLT is that the formal descending subchannel that the first ONU is distributed is different from current interim subchannel, is that the first ONU is redistributed after OFDM subchannels to the first ONU second of ranging of progress.

Alternatively, first MAC module 101, is additionally operable to when OLT is that the first ONU is assigned with formal OFDM subchannels（The 3rd i.e. above-mentioned OFDM subchannels）Afterwards, the upstream bits carrying table of renewal is sent to the ONU by the OLT.

Alternatively, first MAC module 101, is additionally operable to update after bit carrying table and carries out third time ranging to the first ONU.

Second MAC module 102, for sending login request message by the 2nd OFDM subchannels with the second MAC protocol；The registration request response message from the 2nd ONU is received, judges whether the 2nd ONU is legal, is the 2nd ONU distribution ONU marks if legal；Ranging is carried out to the 2nd ONU；For the 2nd ONU allocation of downlink subchannels；

Alternatively, the second MAC module 102, is additionally operable to send the physical layer configuration parameter related to the 2nd OFDM subchannels with the second MAC protocol by the 2nd OFDM subchannels.

Second MAC module 102, for for the 2nd ONU allocation of downlink subchannels, specifically including：

When at least one meets OLT in following condition, the 2nd OFDM subchannels of distribution give the 2nd ONU:

The spectral range that 2nd ONU is supported is matched with the spectral range of the 2nd OFDM subchannels；The PON types that 2nd ONU is supported are consistent with the PON types for the 2nd PON MAC modules that the 2nd OFDM subchannels are associated；And the 2nd OFDM subchannels bandwidth capacity meet the 2nd ONU bandwidth demand. Alternatively, second MAC module 102, is additionally operable to when OLT is that the formal descending subchannel that the 2nd ONU is distributed is different from interim subchannel, is that the 2nd ONU is redistributed after OFDM subchannels to the 2nd ONU second of ranging of progress.

Alternatively, second MAC module 102, is additionally operable to after OLT is that the 2nd ONU is assigned with formal OFDM subchannels, the upstream bits carrying table of renewal is sent to the ONU by the OLT.

Alternatively, second MAC module 102, is additionally operable to update after bit carrying table and carries out third time ranging to the 2nd ONU.

MAC adaptation modules 103,-end is coupling in PMD modules, one end is coupled with the first MAC module 101 and the second MAC module 102, and for the first OFDM subchannels to be associated with into the first PON MAC modules, the 2nd OFDM subchannels are associated with the 2nd PON MAC modules；ONU uplink optical signal is received, according to BWmap, the data-signal that PMD modules are demodulated is sent to the first MAC module 101 or the second MAC module 102.

PMD modules 104, for down direction, the data of the first PON MAC modules are received by the first OFDM subchannels, and be modulated to ofdm signal；The data of the 2nd PON MAC modules are received by the 2nd OFDM subchannels, and are modulated to ofdm signal；Up direction, receives the digital base band OFDM signal that analog-digital converter is sent, and demodulate the manageable data-signals of MAC；

Wherein, the OFDM subcarriers that the first OFDM subchannels are included are different with the OFDM subcarriers that the first OFDM subchannels are included；First MAC protocol is the MAC protocol associated with the first OFDM subchannels, and second MAC protocol is the MAC protocol associated with the 2nd OFDM subchannels, and first MAC protocol is different from second MAC protocol；Specific interaction, reference can be made to the description of embodiment five, is repeated no more here.

The MAC module 102 of first MAC module 101 or second, can using field-programmable gate array it is bad ' J (Field-Programmable Gate Array, FPGA), special integrated chip can be used（Application Specific Integrated Circuit, ASIC), System on Chip/SoC can also be used（System on Chip, SoC), central processing unit can also be used（ Central Processor Unit, CPU), network processing unit can also be used（Network Processor, NP), digital signal processing circuit can also be used（Digital Signal Processor, DSP), microcontroller can also be used（Micro Controller Unit, MCU), programmable controller can also be used（Programmable Logic Device, PLD) or other integrated chips.

Embodiment seven

The embodiment of the present invention discloses a kind of optical line terminal OLT, as shown in figure 11, including processor 1101, memory 1102, communication bus 1103 and communication interface 1104.Connected between CPU1101, memory 1102 and communication interface 1104 by communication bus 1103 and complete mutual communication.

Processor 1101 may be monokaryon or multinuclear CPU, be either specific integrated circuit or one or more integrated circuits to be configured to implement the embodiment of the present invention.

Memory 1102 can be high-speed RAM memory, or nonvolatile memory (non-volatile memory), example.Flash memory flash, or at least one disk deposit 4 all devices.

Memory 1102 is used for computer executed instructions 1105.Specifically, program code can be included in computer executed instructions 1105.

When computer is run, the operation computer executed instructions 1105 of processor 1101 can perform the method flow as described in embodiment five.

By above technical scheme, when PON system faces upgrade requirement, without changing OLT equipment, upgrade cost can be saved with smooth upgrade；Meanwhile, support increases bandwidth on demand, and ODN utilization rate is high, saves resource.Embodiment eight

The statement of the first, second of the embodiment of the present invention is separate with embodiment before, is independent of each other.

The embodiment of the present invention provides a kind of method of communication, and applied in passive optical network PON, the PON includes optical line terminal OLT and multiple optical network unit ONUs, it is characterised in that the OLT supports a variety of PON protocol types, and methods described includes：The female frame of generation, wherein, The configured information of the first subframe and at least a portion of first subframe are encapsulated in female frame, the configured information of first subframe includes the P0N protocol type informations of first subframe；Send female frame.

Optionally, the female frame of the generation, including：The female frame of OLT generations, the configured information of the second subframe and at least a portion of second subframe are also encapsulated in female frame, first subframe and second subframe are the subframe based on different PON protocol types, and the configured information of second subframe includes the PON protocol type informations of second subframe；Transmission female frame, including：The OLT sends female frame to the multiple ONU.

Optionally, the communication between the OLT and the multiple ONU is based on orthogonal frequency division multiplex OFDM principle；The OLT sends female frame to the multiple ONU, including：The OLT sends female frame by the multiple ONU OFDM time/frequency source blocks shared.

Optionally, the configured information of first subframe also includes at least one of length information of first subframe, and the configured information of second subframe also includes at least one of length information of second subframe.

Optionally, the configured information of first subframe also includes at least one of length information of first subframe, and the configured information of second subframe also includes at least one of length information of second subframe.

Optionally, the configured information of first subframe also includes the mark of the first frame processing module, the first frame processing module refers to the module for being handled according to the PON protocol types of the first subframe the first subframe, wherein, the mark of frame processing module is used to indicate the different frame processing modules corresponding from same PON protocol types.

Below, the method for the embodiment of the present invention will be described in detail with reference to concrete scene.As shown in figure 12, female frame can include preamble, PON management fields, sub-frame information indication field, subframe encapsulation region.

Wherein, the leading and check field of frame is known, is not repeated here.

PON management fields, can include type indication field, the field for indicating ONU-ID that PON manages, message entity field for encapsulating specific management message etc..It is optional , PON management fields can also include check field, and check field can be placed on position last in female frame.The type indication field of PON management can serve to indicate that the PON protocol types of female frame, such as be FlexPON.Sub-frame information indication field can include being used to indicate the field of the PON protocol types of the subframe of subframe packaging area；Optionally, sub-frame information indication field can also include being used to indicate the field of the length of subframe；Optionally, sub-frame information indication field can also include being used to indicate the field of the mark of subframe transfer destination, and subframe transfer destination can be different ONU, or can be different frame processing modules in OLT（The sub- MAC module for handling specific PON protocol frames can be referred to）；Optionally, sub-frame information indication field can include check field, for being verified to sub-frame information indication field；Optionally, a sub-frame information indication field can correspond to one or more subframe encapsulation regions, and sub-frame information indication field can also include being used to indicate the field of the quantity of the subframe encapsulation region corresponding to the sub-frame information indication field.

Subframe encapsulation region is used to encapsulating the corresponding subframe based on PON agreements, such as GPON protocol frames either EPON protocol frames or other PON protocol frames.

Optionally, one or more sub-frame information indication fields can be included in female frame, each sub-frame information indication field corresponds to one or more subframe encapsulation regions, wherein identical corresponding to the PON protocol types of multiple subframe encapsulation regions of same sub-frame information indication field.

Optionally, the position in female frame after each subframe encapsulation region can also include subframe check field（Not shown in figure）.

In Figure 12, sub-frame information indication field is located at after PON management fields.Optionally, sub-frame information indication field be may be included among PON management fields, and the embodiment of the present invention is not limited.

Optionally, different sub-frame information indication fields can serve to indicate that different PON protocol types.Corresponding, different subframe encapsulation regions can be used for encapsulating the subframe based on different PON protocol types.

Subframe in the embodiment of the present invention can be the frame of existing various PON agreements, such as GPON frames, or 10GPON frames, or EPON frames etc. or be likely to occur in the future its His PON protocol frames, the embodiment of the present invention is not limited.

The female frame and subframe in the communication means that the embodiment of the present invention is provided are described, the specific method step of the embodiment of the present invention is described in detail below.

Specifically, the main body of the female frame of generation can be OLT.The configured information of one or more subframes can be encapsulated in female frame of OLT generations, these information are carried in female frame in corresponding sub-frame information indication field.It is corresponding, one or more subframes can be encapsulated in female frame of OLT generations, these subframes are encapsulated in corresponding subframe encapsulation region.It is worth noting that, in some cases, a subframe encapsulation region may be not big enough, it is impossible to a complete subframe of encapsulation.At this moment need this subframe carrying out slicing treatment, each section of the subframe after section is encapsulated into multiple subframe encapsulation regions in one or more female frames respectively.In this case, the field that can also include being used to indicate section mark in the sub-frame information indication field corresponding to the subframe encapsulation region of a subframe part is carried.

Optionally, the communication between OLT and the multiple ONU is based on orthogonal frequency division multiplex OFDM principle, and certain OLT can also be communicated with the multiple ONU using other modes or principle, and such as time-multiplexed mode, the embodiment of the present invention is not limited.

When carrying out the communication based on OFDM principles, the proper communication that communication means provided in an embodiment of the present invention can be used between OLT and multiple ONU.I.e. in the downstream direction, OLT is encapsulated into the subframe for being sent to each ONU by female frame in different subframe encapsulation regions, the PON protocol types of each subframe are indicated in corresponding sub-frame information indication field simultaneously, wherein difference ONU subframe can be the subframe based on identical PON agreements, can also the subframe based on different PON agreements.Then female frame is modulated in an optical wavelength by way of OFDM again and is sent to each ONU.Each ONU is received after corresponding female frame, first parses female frame, and the PON protocol types supported further according to itself and the ONU ID of itself, which are extracted, issues the subframe of itself.Specifically, the subframe that ONU chooses, the PON protocol types and ONU indicated in sub-frame information indication field corresponding to the subframe itself supports that PON types are identical, ONU ID simultaneously in the sub-frame information indication field corresponding to the subframe or entrained by the subframe itself are identical with the ONU ID of the ONU, and the sub-frame information indication field wherein corresponding to the subframe refers to Encapsulate the sub-frame information indication field corresponding to the subframe encapsulation region of the subframe.Certainly, at one

When only one of which supports the ONU of certain specific PON agreement in PON, such as only one of which supports GPON ONU, other ONU to support other PON agreements, then the ONU only can just can extract according to PON protocol type and be sent to the subframe of itself.In up direction, each ONU can pass through time-multiplexed mode, communicated by an optical wavelength with OLT, the time that wherein each ONU sends signal is different, the time that each specific ONU sends signal can distribute by way of OLT uses Dynamic Bandwidth Allocation DBA.The PON protocol types of the subframe encapsulated in female frame that OLT is sent by ONU and corresponding ONU ONU ID recognize signal that different ONU are sent.In up direction, it can also be communicated by way of OFDMA, each ONU takes certain communication resource in two dimensions of time and subcarrier, OLT controls the communication resource that each ONU takes by way of DBA.

Section communication between ONU, register flow path or management between OLT and multiple ONU is such as served only for communicate, rather than normal data service communications in addition, regular traffic data communication can be carried out by embodiment one to method described in embodiment seven.For example, it is also possible to be, only down direction utilizes the communication means of the embodiment of the present invention, and in up direction still with time-multiplexed mode, and subframe is encapsulated without female frame, but utilize each ONU corresponding PON protocol frames（Namely corresponding subframe）Directly communicated.

In a kind of specific embodiment, in down direction, OLT modulates downlink data by OFDM, using wavelength as λ_άOptical signal as carrier wave, be broadcast to all ONU, different ONU by when（Time slot）And frequency（Subcarrier）Two dimensions extract the data of oneself, i.e., using OFDMA access ways；In up direction, ONU modulates upstream data by OFDM, using wavelength as λ_uOptical signal as carrier wave, OLT is accessed in TDMA modes, time of ONU transmission data is controlled by OLT by DBA mechanism；Or, in up direction, different ONU modulate upstream data by OFDM, and carrier wave is used as using wavelength X ^ optical signals, OLT is accessed in OFDMA modes, time of ONU transmission data and subcarrier are controlled by OLT by Dynamic Resource Allocation for Multimedia mechanism.In this framework, except distributing to the respective time-frequency moneys of each ONU Source block as data channel outside, fixed OFDM frequency spectrums can also be delimited, i.e., public time/frequency source block is used as public administration passage, is shared by multiple ONU.

Public administration passage is in the low frequency beginning of frequency language, is easy to ONU to be quickly found out the passage when starting.Public administration passage can also frequency language other positions, but its frequency domain characteristic is fixed, has fixed rule to be easy to ONU to search in other words, and the integral multiple starting of such as 10MHz, length is in 1MHz frequency domains.Public administration passage and data channel can be continuous in frequency, may not be continuous.The time/frequency source block that OLT can be shared by multiple ONU sends the female frame of generation.

In up direction, the communication means that can be provided from the embodiment of the present invention, it is also possible to communication means up existing PON.In communication means provided in an embodiment of the present invention, corresponding subframe is encapsulated into the subframe encapsulation region of female frame by ONU, while identifying the PON protocol types of the subframe in subframe letter, bag, indication field.Optionally, the ONU ID of the ONU can be also carried in the PON management fields for female frame that ONU is sent or in sub-frame information indication field, the mapping table that OLT can be identified according to ONU ID and frame processing module, is sent to the frame processing module by the corresponding female frames of the ONU ID and identifies corresponding target frame processing module.Optionally, when the frame processing module for having individual multiple same agreements of support in OLT（Can be the sub- MAC processing modules for handling PON protocol frames) when, the mark of specific frame processing module can be also carried in the PON management fields for female frame that ONU is sent or in sub-frame information indication field, for indicating the different frame processing modules corresponding from same PON protocol types.So, OLT is received after female frame of ONU transmissions, corresponding female frame can be sent into target frame processing module according to the mark of different frame processing modules.

What deserves to be explained is, the length of each subframe encapsulation region can be fixed or unfixed in female frame.If the length of each subframe encapsulation region can be fixed in female frame, the quantity of subframe encapsulation region can be carried in the PON management fields of female frame.If the length of each subframe encapsulation region is unfixed in female frame, the length of each subframe encapsulation region can be carried in the PON management fields of female frame, or the length of its corresponding subframe encapsulation region can be carried in each sub-frame information indication field. Below communication means provided in an embodiment of the present invention is illustrated from the angle of reception.

In receiving terminal, this method includes：Receive in female frame, female frame and encapsulate the configured information of subframe and at least a portion of the subframe, the configured information of the subframe includes the PON protocol type informations of the subframe；Parse female frame；PON protocol types according to indicated by the configured information of the subframe are handled the subframe in female frame.

Optionally, the female frame of the reception, including：The first ONU in the multiple ONU receives female frame, wherein, at least a portion content of each subframe in multiple subframes is encapsulated in female frame, and the multiple respective configured information of subframe, two subframes based on different PON protocol types are comprised at least in the multiple subframe, the multiple respective configured information of subframe includes the PON protocol type informations of each subframe itself.In this PON, if the PON protocol types that the first ONU is supported are unique, the PON protocol types that so described first ONU can be supported according to the first ONU itself, and the multiple respective configured information of subframe, the PON protocol type identical subframes for selecting PON protocol types to be supported with the first ONU itself in the multiple subframe, and the subframe of selection is handled according to the first ONU itself the PON protocol types supported.If in this PON, the PON protocol type identicals ONU for thering is multiple and the first ONU to be supported, then after the selected subframe matched with itself, ONU also needs to judge whether the subframe points to itself according to the ONU ID carried in subframe.

Optionally, the respective configured information of the multiple subframe also mark of the transmission ONU including each subframe itself；PON protocol types, the first ONU itself mark and the respective configured information of the multiple subframe that first ONU is supported according to the first ONU itself, select PON protocol types indicated in configured information identical with the PON protocol types that-ONU itself is supported in the multiple subframe and ONU indicated in configured information mark and the mark identical subframe of the first ONU itself, and the PON protocol types itself supported according to the-ONU are handled the subframe of selection.

Optionally, the respective configured information of the multiple subframe also includes length information, the length for indicating at least a portion content that each subframe is each encapsulated into female frame. Optionally, the communication between the OLT and the multiple ONU is based on orthogonal frequency division multiplex OFDM principle；The female frame of reception, including：Receive the female frame being carried in the OFDM time/frequency source blocks that the multiple ONU shares.

Because OLT supports a variety of PON protocol types, 0LT can include multiple frame processing modules, and each frame processing module is used to handle a kind of frame of P0N protocol types.0LT is received after female frame, female frame is parsed, and the PON protocol types according to indicated by the configured information of the subframe, select the frame processing module that can be used to handle the PON protocol types indicated by the configured information of the subframe to handle the subframe from the multiple frame processing module.

When there is the frame processing module of a multiple same PON protocol type of support in OLT, the mark of frame processing module can also be included in the configured information of the subframe.The mark of PON protocol types and frame processing module of the OLT according to indicated by the configured information of the subframe, selection can be used to handle PON protocol types and mark and the frame processing module indicated by the configured information of the subframe the mark identical frame processing module indicated by the configured information of the subframe from the multiple frame processing module, and the subframe is handled using the frame processing module of selection.

The embodiment of the present invention also provides a kind of communicator, including：Processing module, for generating female frame, wherein, the configured information of the first subframe and at least a portion of first subframe are encapsulated in female frame, the configured information of first subframe includes the PON protocol type informations of first subframe；Sending module, for sending female frame.

Optionally, the communicator is optical line terminal OLT;The configured information of the second subframe and at least a portion of second subframe are also encapsulated in female frame, first subframe and second subframe are the subframe based on different PON protocol types, and the configured information of second subframe includes the PON protocol type informations of second subframe.Further, the OLT is applied in passive optical network PON, and the PON includes the OLT and multiple optical network unit ONUs, and the OLT supports a variety of PON protocol types；Communication between the OLT and the multiple ONU is based on orthogonal frequency division multiplex OFDM principle；The processing module, for female frame to be modulated in the OFDM time/frequency source blocks that the multiple ONU shares；It is described Sending module, for the female frame for being carried on the OFDM time/frequency source blocks to be sent.Optionally, the configured information of first subframe also includes at least one of length information of first subframe, and the configured information of second subframe also includes at least one of length information of second subframe.Optionally, the configured information of first subframe also includes the first ONU mark, the configured information of second subframe also includes the mark of the 2nd ONU, wherein, first ONU is the transmission objectives ONU of first subframe, and the 2nd ONU is the transmission objectives ONU of second subframe.Optionally, the configured information of first subframe also includes the mark of the first frame processing module, the first frame processing module refers to the module for being handled according to the PON protocol types of the first subframe the first subframe, wherein, the mark of frame processing module is used to indicate the different frame processing modules corresponding from same PON protocol types.

The embodiment of the present invention also provides a kind of communicator, including：Receiving module, the configured information of subframe and at least a portion of the subframe are encapsulated for receiving in female frame, female frame, the configured information of the subframe includes the PON protocol type informations of the subframe；Processing module, for parsing female frame, and PON protocol types according to indicated by the configured information of the subframe are handled the subframe in female frame.

Optionally, communicator is optical network unit ONU;At least a portion content of each subframe in multiple subframes is also encapsulated in female frame, and the multiple respective configured information of subframe, two subframes based on different PON protocol types are comprised at least in the multiple subframe, the multiple respective configured information of subframe includes the PON protocol type informations of each subframe itself；The processing module, specifically includes parsing adaptation module, frame processing module；The parsing adaptation module, for parsing female frame, and the PON protocol types itself supported according to the ONU, and the multiple respective configured information of subframe, the PON protocol type identical subframes that PON protocol types itself are supported with the ONU are selected in the multiple subframe;The frame processing module, the PON protocol types for itself being supported according to the ONU are handled the subframe of selection.It is further alternative, the multiple respective configured information of the subframe also mark of the transmission ONU including each subframe itself；The parsing adaptation module, specifically For the PON protocol types itself supported according to the ONU, the ONU itself mark and the respective configured information of the multiple subframe, in the multiple subframe select PON protocol types indicated in configured information identical with the PON protocol types that the ONU is supported itself and ONU indicated in configured information mark and the ONU itself mark identical subframe.

Optionally, the communicator is optical line terminal OLT, and the OLT supports a variety of PON protocol types；The processing module, specifically includes parsing adaptation module, multiple frame processing modules, wherein, each frame processing module is used to handle a kind of frame of P0N protocol types；The parsing adaptation module, specifically for parsing female frame, and the PON protocol types according to indicated by the configured information of the subframe, selection can be used to handle the frame processing module of the PON protocol types indicated by the configured information of the subframe from the multiple frame processing module；Selected frame processing module in the multiple frame processing module, is handled the subframe for the PON protocol types indicated by the configured information according to the subframe.It is further alternative, the mark of frame processing module is also included in the configured information of the subframe；The parsing adaptation module, specifically for parsing female frame, and PON protocol types and the mark of frame processing module according to indicated by the configured information of the subframe, selection can be used to handle PON protocol types and mark and the frame processing module indicated by the configured information of the subframe the mark identical frame processing module indicated by the configured information of the subframe from the multiple frame processing module.

What deserves to be explained is, the communicator of the embodiment of the present invention can be chip piece, such as digital signal processor DSP, either on-site programmable gate array FPGA or application-specific integrated circuit ASIC.Processing module, it can be understood as the logic processing module of chip, sending module and receiving module can be understood as the transmission interface and receiving interface of corresponding chip.The communicator of the embodiment of the present invention can specifically include processor, digital analog converter and/or analog-digital converter, emitter and/or receiver.Wherein, processor realizes the function of above-mentioned processing module；The signal converting analogue signals that digital analog converter exports processor, and sent by emitter, the combination of digital analog converter and emitter here may be considered a kind of embodiment of sending module；After receiver is using the principle receiver signal of light coherent reception, turned by analog-digital converter Data signal is turned to, processor processing is then transported to, the combination of receiver and analog-digital converter here may be considered a kind of embodiment of receiving module.

The embodiment of the present invention also provides a kind of communicator, including processor, and the processor is used for operating instruction, and when the instruction is run, the processor can be used to perform the foregoing method of the embodiment of the present invention.Here processor can be chip piece, such as digital signal processor

DSP, either on-site programmable gate array FPGA or application-specific integrated circuit ASIC.This communicator can also include memory, for storing corresponding instruction.Certainly, in one embodiment, these instructions can be solidificated in corresponding processor without single memory storage.

The embodiment of the present invention also provides a kind of computer-readable medium, for store instruction, and computer can be driven to perform above-mentioned method of the embodiment of the present invention when instruction is run by computer.

The communicator of the embodiment of the present invention is specifically described below in conjunction with the accompanying drawings.As shown in figure 13, a PON system includes OLT and multiple ONU (ONU is only schematically drawn in figure), is connected between OLT and ONU by ODN.On the left of figure for OLT, the combination of plurality of frame processing module and parsing adaptation module is equivalent to processing module, and TRx is used to represent sending module and/or receiving module.On the right side of figure for ONU, the wherein combination of frame processing module and parsing adaptation module is equivalent to processing module, and TRx is used to represent sending module and/or receiving module.OLT supports a variety of PON agreements.OLT includes multiple frame processing modules（4 are exemplarily provided in figure), each frame processing module can include corresponding sub- MAC module, for handling a kind of protocol frame of PON agreements.

In the downstream direction, the parsing adaptation module in OLT receives one or more PON agreements subframes from the first frame processing module, the second frame processing module, the 3rd frame processing module and the 4th frame processing module.The PON agreements subframe received is packaged by parsing adaptation module according to the foregoing method of the embodiment of the present invention, to generate female frame.It is already described, is not repeated herein before the specific frame structure of female frame and the content carried accordingly.Female frame of generation is modulated in OFDM time/frequency source blocks by parsing adaptation module, is sent finally by TRx.The optical signal that TRx is sent is transmitted by ODN, is finally received by each ONU.ONU is connect by TRx Receive corresponding optical signal.ONU parsing adaptation module extracts female frame from corresponding OFDM time/frequency source blocks, and parses female frame.The subframe that the PON protocol types that the PON protocol types indicated in sub-frame information indication field in the female frame of ONU selections are supported with itself match, the processing that frame processing module carries out protocol stack is sent to by the subframe of selection.If carrying ONU ID in the PON management fields or sub-frame information indication field in the female frame received, so parsing adaptation module further can select the subframe that PON protocol types and ONU ID match according to the PON protocol types indicated in the sub-frame information indication field and the ONU ID, and the subframe of selection is sent to ONU frame processing module.If without carrying ONU ID in the PON management fields or sub-frame information indication field in the female frame received, the subframe that so parsing adaptation module can first select PON protocol types to match is sent to frame processing module, the ONU ID and ONU ID of itself subframes matched that include are handled in ONU frame processing module selection subframe, can be abandoned and be disregarded for the ONU ID and ONU ONU ID of itself included in subframe the subframes not matched that.

In the upstream direction, the subframe that ONU parsing adaptation module receiving frame processing module is sent, subframe is encapsulated into female frame, female frame of generation is modulated in OFDM time/frequency source blocks, sent by ONU TRx.Female frame that ONU is sent is sent to OLT by ODN.OLT is received after female frame that ONU is sent by TRx, using the female frame parsed in adaptation module extraction OFDM adapted resource blocks, and parses female frame.The PON protocol types of subframe of the adaptation module according to indicated by sub-frame information indication field in female frame are parsed, the Frame Handler module for selecting the PON protocol types with the subframe to match, and the subframe is sent to the frame processing module matched.Frame processing module is received after subframe, is handled according to set PON agreements.In some cases, the frame processing module of multiple support PON protocol types of the same race may be included in OLT.Under this situation, the frame processing module mark carried in PON management fields or sub-frame information indication field in female frame that OLT parsing adaptation module further can be sent according to ONU, to select the frame processing module that frame processing module mark of the mark with being carried in female frame matches, and the subframe encapsulated in female frame is sent to the frame processing module matched.

The embodiment of the present invention also provides a kind of communication system, including foregoing times of the embodiment of the present invention Anticipate a kind of communicator.

Communication means provided in an embodiment of the present invention, communicator, communication system, computer-readable medium and corresponding frame structure, the female frame that can be recognized by an OLT and each ONU encapsulates the subframe of corresponding different PON agreements so that a PON can support different PON agreements simultaneously.Only illustrated in the embodiment of the present invention by taking G/E-PON and 10G-PON as an example, but not limited to this, with the evolution of network, it is possible that single pass 40G-PON, 100G-PON in network, also technical scheme can be used, realize that various protocols, the ONU of a variety of speed coexist, will not be repeated here.

It will be recognized by those of ordinary skill in the art that the possibility implementation of various aspects of the invention or various aspects can be embodied as system, method or computer program product.Therefore, the possibility implementation of each aspect of the present invention or various aspects can use complete hardware embodiment, complete software embodiment（Including firmware, resident software etc.）, or the embodiment of integration software and hardware aspect form, collectively referred to herein as " circuit ", " module " or " system ".In addition, the possibility implementation of each aspect of the present invention or various aspects can use the form of computer program product, computer program product refers to be stored in the computer readable program code in computer-readable medium.

Computer-readable medium can be computer-readable signal media or computer-readable recording medium.Computer-readable recording medium is including but not limited to electronics, magnetic, optics, electromagnetism, infrared or semiconductor system, equipment either device or foregoing any appropriately combined, such as random access memory（RAM), read-only storage（ROM), Erasable Programmable Read Only Memory EPROM (EPROM or flash memory), optical fiber, portable read-only storage (CD-ROM).

Processor in computer reads the computer readable program code being stored in computer-readable medium so that processor is able to carry out function action specified in the combination of each step or each step in flow charts；The device in function action specified in each piece of block diagram or each piece of combination is implemented in generation. Computer readable program code can perform completely on the computer of user, partly perform on the computer of user, as single software kit, partly on the computer of user and part is performed on remote computer or server on the remote computer, or completely.It is also noted that in some alternate embodiments, each piece of function of indicating may not be occurred by the order indicated in figure in each step or block diagram in flow charts.For example, dependent on involved function, two steps or two blocks shown in succession may be actually executed substantially concurrently, or these blocks may sometimes be performed with reverse order.

Those of ordinary skill in the art are it is to be appreciated that the unit and algorithm steps of each example described with reference to the embodiments described herein, can be realized with the combination of electronic hardware or computer software and electronic hardware.These functions are performed with hardware or software mode actually, depending on the application-specific and design constraint of technical scheme.Professional and technical personnel can realize described function to each specific application using distinct methods, but this realization is it is not considered that beyond the scope of this invention.

It is described above; only embodiment of the invention, but protection scope of the present invention is not limited thereto, any one skilled in the art the invention discloses technical scope in; change or replacement can be readily occurred in, should be all included within the scope of the present invention.Therefore, protection scope of the present invention described should be defined by scope of the claims.

Several embodiments of the present invention are the foregoing is only, those skilled in the art is according to application god and scope.

Claims (1)

1. Claims

   1st, a kind of method of communication, applied in EPON P0N, the PON includes optical line terminal OLT and multiple optical network unit ONUs, it is characterised in that the OLT supports a variety of PON protocol types, and methods described includes：

   The female frame of generation, wherein, the configured information of the first subframe and at least a portion of first subframe are encapsulated in female frame, the configured information of first subframe includes the P ON protocol type informations of first subframe；

   Send female frame.

   2nd, according to the method described in claim 1, it is characterised in that：

   The female frame of generation, including：The female frame of OLT generations, the configured information of the second subframe and at least a portion of second subframe are also encapsulated in female frame, first subframe and second subframe are the subframe based on different PON protocol types, and the configured information of second subframe includes the PON protocol type informations of second subframe；

   Transmission female frame, including：The OLT sends female frame to the multiple ONU.

   3rd, method according to claim 2, it is characterised in that the communication between the OLT and the multiple ONU is based on orthogonal frequency division multiplex OFDM principle；

   The OLT sends female frame to the multiple ONU, including：

   The OLT sends female frame by the multiple ONU OFDM time/frequency source blocks shared.

   4th, according to the method in claim 2 or 3, it is characterised in that：

   The configured information of first subframe also includes at least one of length information of first subframe, and the configured information of second subframe also includes at least one of length information of second subframe.

   5th, according to any described method of claim 2 to 4, it is characterised in that：

   The configured information of first subframe also includes the first ONU mark, second son The configured information of frame also includes the mark of the 2nd ONU, wherein, the first ONU is the transmission objectives 0NU of first subframe, and the 2nd 0NU is the transmission objectives ONU of second subframe.

   6th, according to the method described in claim 1, it is characterised in that：

   The configured information of first subframe also includes the mark of the first frame processing module, the first frame processing module refers to the module for being handled according to the PON protocol types of the first subframe the first subframe, wherein, the mark of frame processing module is used to indicate the different frame processing modules corresponding from same PON protocol types.

   7th, a kind of method of communication, applied in passive optical network PON, the PON includes optical line terminal OLT and multiple optical network unit ONUs, it is characterised in that the OLT supports a variety of PON protocol types, and methods described includes：

   Receive in female frame, female frame and encapsulate the configured information of subframe and at least a portion of the subframe, the configured information of the subframe includes the PON protocol type informations of the subframe；Parse female frame；

   P ON protocol types according to indicated by the configured information of the subframe are handled the subframe in female frame.

   8th, method according to claim 7, it is characterised in that：

   The female frame of reception, including：The first ONU in the multiple ONU receives female frame, wherein, at least a portion content of each subframe in multiple subframes is encapsulated in female frame, and the multiple respective configured information of subframe, two subframes based on different PON protocol types are comprised at least in the multiple subframe, the multiple respective configured information of subframe includes the PON protocol type informations of each subframe itself；

   P ON protocol types according to indicated by the configured information of the subframe are handled the subframe in female frame, including：

   The PON protocol types that first ONU is supported according to the first ONU itself, and the multiple respective configured information of subframe, the PON protocol type identical subframes for selecting PON protocol types to be supported with the first ONU itself in the multiple subframe, and root The subframe of selection is handled according to the first ONU itself the PON protocol types supported.

   9th, method according to claim 8, it is characterised in that：

   The multiple respective configured information of the subframe also mark of the transmission ONU including each subframe itself；

   The PON protocol types that first ONU is supported according to the first ONU itself, and the multiple respective configured information of subframe, the PON protocol type identical subframes for selecting PON protocol types to be supported with the first ONU itself in the multiple subframe, and the subframe of selection is handled according to the first ONU itself the PON protocol types supported, including：

   PON protocol types, the first ONU itself mark and the respective configured information of the multiple subframe that first ONU is supported according to the first ONU itself, select PON protocol types indicated in configured information identical with the PON protocol types that the first ONU itself is supported in the multiple subframe and ONU indicated in configured information mark and the mark identical subframe of the first ONU itself, and the subframe of selection is handled according to the first ONU itself the PON protocol types supported.

   10th, according to any described method of claim 7 to 9, it is characterised in that：

   The multiple respective configured information of subframe also includes length information, the length for indicating at least a portion content that each subframe is each encapsulated into female frame.

   11st, according to any described method of claim 7 to 10, it is characterised in that：

   Communication between the OLT and the multiple ONU is based on orthogonal frequency division multiplex OFDM principle；

   The female frame of reception, including：Receive the female frame being carried in the OFDM time/frequency source blocks that the multiple ONU shares.

   12nd, method according to claim 7, it is characterised in that：

   The 0LT includes multiple frame processing modules, and each frame processing module is used to handle a kind of frame of P0N protocol types；

   The female frame of reception, including：The OLT receives female frame； P ON protocol types according to indicated by the configured information of the subframe are handled the subframe in female frame, including：

   PON protocol types of the OLT according to indicated by the configured information of the subframe, selects the frame processing module that can be used to handle the PON protocol types indicated by the configured information of the subframe to handle the subframe from the multiple frame processing module.

   13rd, method according to claim 12, it is characterised in that：

   Also include the mark of frame processing module in the configured information of the subframe；

   PON protocol types of the OLT according to indicated by the configured information of the subframe, the frame processing module that can be used to handle the PON protocol types indicated by the configured information of the subframe is selected to handle the subframe from the multiple frame processing module, including：

   The mark of PON protocol types and frame processing module of the OLT according to indicated by the configured information of the subframe, selection can be used to handle PON protocol types and mark and the frame processing module indicated by the configured information of the subframe the mark identical frame processing module indicated by the configured information of the subframe from the multiple frame processing module, and the subframe is handled using the frame processing module of selection.

   14th, a kind of communicator, it is characterised in that the communicator includes：Processing module, for generating female frame, wherein, the configured information of the first subframe and at least a portion of first subframe are encapsulated in female frame, the configured information of first subframe includes the PON protocol type informations of first subframe；

   Sending module, for sending female frame.

   15th, communicator according to claim 14, it is characterised in that：

   The communicator is optical line terminal OLT;

   The configured information of the second subframe and at least a portion of second subframe are also encapsulated in female frame, first subframe and second subframe are the subframe based on different PON protocol types, and the configured information of second subframe includes the PON protocol type informations of second subframe.

   16th, communicator according to claim 15, it is characterised in that： The OLT is applied in passive optical network PON, and the PON includes the OLT and multiple optical network unit ONUs, and the OLT supports a variety of PON protocol types；

   Communication between the OLT and the multiple ONU is based on orthogonal frequency division multiplex OFDM principle；

   The processing module, for female frame to be modulated in the OFDM time/frequency source blocks that the multiple ONU shares；

   The sending module, for the female frame for being carried on the OFDM time/frequency source blocks to be sent.

   17th, the communicator according to claim 15 or 16, it is characterised in that：The configured information of first subframe also includes at least one of length information of first subframe, and the configured information of second subframe also includes at least one of length information of second subframe.

   18th, according to any described communicator of claim 15 to 17, it is characterised in that：The configured information of first subframe also includes the first ONU mark, the configured information of second subframe also includes the mark of the 2nd ONU, wherein, first ONU is the transmission objectives ONU of first subframe, and the 2nd ONU is the transmission objectives ONU of second subframe.

   19th, according to any described communicator of claim 14, it is characterised in that：The configured information of first subframe also includes the mark of the first frame processing module, the first frame processing module refers to the module for being handled according to the PON protocol types of the first subframe the first subframe, wherein, the mark of frame processing module is used to indicate the different frame processing modules corresponding from same PON protocol types.

   20th, a kind of communicator, it is characterised in that the communicator includes：

   Receiving module, the configured information of subframe and at least a portion of the subframe are encapsulated for receiving in female frame, female frame, the configured information of the subframe includes the PON protocol type informations of the subframe；

   Processing module, for parsing female frame, and it is signified according to the configured information of the subframe The PON protocol types shown are handled the subframe in female frame.

   21st, communicator according to claim 20, it is characterised in that：

   The communicator is optical network unit ONU;

   At least a portion content of each subframe in multiple subframes is also encapsulated in female frame, and the multiple respective configured information of subframe, two subframes based on different PON protocol types are comprised at least in the multiple subframe, the multiple respective configured information of subframe includes the PON protocol type informations of each subframe itself；

   The processing module, specifically includes parsing adaptation module, frame processing module；

   The parsing adaptation module, for parsing female frame, and the PON protocol types itself supported according to the ONU, and the multiple respective configured information of subframe, the PON protocol type identical subframes that PON protocol types itself are supported with the ONU are selected in the multiple subframe；

   The frame processing module, the PON protocol types for itself being supported according to the ONU are handled the subframe of selection.

   22nd, communicator according to claim 21, it is characterised in that：

   The multiple respective configured information of the subframe also mark of the transmission ONU including each subframe itself；

   The parsing adaptation module, specifically for the PON protocol types itself supported according to the ONU, the ONU itself mark and the respective configured information of the multiple subframe, in the multiple subframe select PON protocol types indicated in configured information identical with the PON protocol types that the ONU is supported itself and ONU indicated in configured information mark and the ONU itself mark identical subframe.

   23rd, communicator according to claim 20, it is characterised in that：

   The communicator is optical line terminal OLT, and the OLT supports a variety of PON protocol types；

   The processing module, specifically includes parsing adaptation module, multiple frame processing modules, wherein, each frame processing module is used to handle a kind of frame of P0N protocol types； The parsing adaptation module, specifically for parsing female frame, and the PON protocol types according to indicated by the configured information of the subframe, selection can be used to handle the frame processing module of the PON protocol types indicated by the configured information of the subframe from the multiple frame processing module；Selected frame processing module in the multiple frame processing module, is handled the subframe for the PON protocol types indicated by the configured information according to the subframe.

   24th, communicator according to claim 23, it is characterised in that：

   Also include the mark of frame processing module in the configured information of the subframe；

   The parsing adaptation module, specifically for parsing female frame, and PON protocol types and the mark of frame processing module according to indicated by the configured information of the subframe, selection can be used to handle PON protocol types and mark and the frame processing module indicated by the configured information of the subframe the mark identical frame processing module indicated by the configured information of the subframe from the multiple frame processing module.

   25th, a kind of communication system, it is characterised in that the communication system includes any described communicator in claim 14 to 24.

   26th, a kind of communicator, it is characterised in that the communicator includes processor, the processor is used for operating instruction, and when the instruction is run, the processor can be used to perform the method as described in claim 1 to 14 is any.

   27th, a kind of computer-readable medium, can drive computer to perform the method as described in claim 1 to 14 is any for store instruction, when the instruction is run by computer.

   28th, a kind of frame structure, it is characterised in that the frame structure includes：

   First sub-frame information indication field, the first sub-frame information indication field is used for the passive optical network PON protocol type for indicating the first subframe；

   First subframe encapsulation region, for encapsulating the first subframe.

   29th, frame structure according to claim 28, it is characterised in that the frame structure includes：

   Second sub-frame information indication field, the second sub-frame information indication field is used for the PON protocol types for indicating the second subframe； Second subframe encapsulation region, for encapsulating the second subframe；

   PON protocol types indicated by wherein described first sub-frame information are different from the PON protocol types indicated by second subframe.