CN103297165B

CN103297165B - WDM-PON moving and fixing comprehensive accessing method based on CPRI frames

Info

Publication number: CN103297165B
Application number: CN201310153707.1A
Authority: CN
Inventors: 何岩
Original assignee: Fiberhome Telecommunication Technologies Co Ltd
Current assignee: Fiberhome Telecommunication Technologies Co Ltd
Priority date: 2013-04-28
Filing date: 2013-04-28
Publication date: 2015-07-01
Anticipated expiration: 2033-04-28
Also published as: CN103297165A

Abstract

The invention discloses a WDM-PON moving and fixing comprehensive accessing method based on CPRI frames, and relates to the field of PON accessing. The moving and fixing comprehensive accessing method comprises the following steps that in a down direction, a local side relaying framing module in a moving and fixing comprehensive accessing OLT receivers N down local side CPRI signals for a mobile service and N down local side GE signals for a fixed network service, each down local side CPRI signal and each down local side GE signal are repackaged in a composite frame, N composite frames are formed, the speed of each composite frame is higher than or equal to the speed of the CPRI signals, the N composite frames are sent to N far-end WDM-PON optical modules through an optical module, a coupler and an ODN, and a far-end framing module carries out analysis on the composite frames to obtain down far-end CPRI signals and down far-end GE signals. The WDM-PON moving and fixing comprehensive accessing method based on the CPRI frames can concurrently transmit the mobile service and the fixed network service, achieves deep coverage of wireless signals of operators, and saves main optical fiber resources accessed into a network.

Description

WDM-PON based on CPRI frame moves solid Integrated access method

Technical field

The present invention relates to PON (Passive Optical Network, EPON) access field, particularly relate to a kind of based on CPRI (Common Public Radio Interface, common public radio interface) WDM-PON (Wavelength DivisionMultiplexing Passive Optical Network, Wave division multiplexing passive optical network) of frame moves solid Integrated access method.

Background technology

PON access network, as the pith of in Networks of Fiber Communications, has broad application prospects.Existing EPON (Ethernet Passive Optical Network, Ethernet passive optical network), GPON (Gigabit-Capable Passive Optical Network, gigabit passive optical network) system, the signal of fixed network can only be carried, cannot mobile service be transmitted.In existing WDM-PON, each ONU (Optical Network Unit, optical network unit) uses a pair up-downgoing wavelength, and the business of carrying is more single, the signal of fixed network can only be carried, or the wireless mobile signal of digital form can only be carried.Generally at present increase antenna by C-RAN, transmit mobile service, C-RAN is the Radio Access Network framework of advanced person that one possesses concentrated (Centralized), cooperation (Cooperative), cloud (Cloud), green (Clean) feature.But C-RAN can only carry the wireless mobile signal of the digital form being similar to CPRI frame.Because fiber resource is limited, in actual applications, be often difficult to find available optical fiber cable.

Along with the development of communication service, the demand that people merge transmission to mobile service and fixed network services is more and more obvious, but, traditional indoor moving business ubiquity degree of depth covers the defects such as not enough, and existing multi-plexing light accessing system cannot meet the market demand simultaneously transmitting mobile service and fixed network services.

Summary of the invention

The object of the invention is the deficiency in order to overcome above-mentioned background technology, a kind of WDM-PON based on CPRI frame is provided to move solid Integrated access method, the mobile service of operator and fixed network services can be accessed simultaneously, both C-RAN technology high bandwidth had been met, timing information requires strict demand, meet again the transmission requirement of fixed network services, movement access and fixed network access are united two into one, simplify the structure of access network, mobile service and fixed network services can be transmitted simultaneously, the degree of depth realizing operator's mobile radiotelephone signal covers, save the trunk optical fiber resource of access network.

WDM-PON based on CPRI frame provided by the invention moves solid Integrated access method, comprise and move solid Integrated access OLT, ODN and somely move solid Integrated access ONU, move solid Integrated access OLT to move solid Integrated access ONU by ODN be connected with some, move solid Integrated access OLT and comprise local side relaying framing module, N number of parallel local side WDM-PON optical module and coupler, N is positive integer, and 8≤N≤64, local side relaying framing module is connected with coupler by N number of parallel local side WDM-PON optical module, eachly move solid Integrated access ONU and comprise far-end framing module and far-end WDM-PON optical module, the coupler moved in solid Integrated access OLT is connected with each far-end WDM-PON optical module moved in solid Integrated access ONU by ODN, local side relaying framing module comprises N number of local side trunk interface, N number of first local side GE interface and N number of first local side hybrid interface, each local side WDM-PON optical module comprises 1 the second local side hybrid interface, coupler comprises a coupling public port and N number of coupling shunting port, each far-end WDM-PON optical module comprises 1 the first far-end hybrid interface, and far-end framing module comprises 1 the second far-end hybrid interface, 1 the first far-end IF interface and 1 the first far-end gigabit Ethernet GE interface,

Down direction: move local side relaying framing module in solid Integrated access OLT and receive N part for the descending local side CPRI signal of mobile service and N part descending local side GE signal for fixed network services, by every a descending local side CPRI signal and every a descending local side GE signal Reseal in a compound frame, form N number of compound frame, the speed of the speed >=CPRI signal of compound frame, N number of compound frame is mail to the second local side hybrid interface of N number of parallel local side WDM-PON optical module by local side relaying framing module respectively by the first local side hybrid interface; N number of compound frame is modulated into the different N number of downlink optical signal of wavelength by N number of parallel local side WDM-PON optical module, by N root optical fiber, N number of downlink optical signals different for wavelength is sent to N number of coupling shunting port of coupler; N number of downlink optical signals different for wavelength is coupled to coupling public port and outputs to ODN by coupler; N number of downlink optical signals different for wavelength is sent to N number of far-end WDM-PON optical module moved in solid Integrated access ONU by ODN respectively; Each far-end WDM-PON optical module carries out light-to-current inversion to the downlink optical signal received, form descending far-end mixed signal, descending far-end mixed signal is the compound frame being packaged with CPRI signal and GE signal, by the first far-end mixed signal interface, compound frame is sent to the second far-end mixed signal interface of far-end framing module; Far-end framing module is resolved the compound frame received, and obtains the descending far-end CPRI signal for mobile service and the descending far-end GE signal for fixed network services;

Up direction: each far-end framing module of moving in solid Integrated access ONU receives the up far-end CPRI signal for mobile service and the up far-end GE signal for fixed network services, by up far-end CPRI signal and up far-end GE signal assemble in a compound frame, form compound frame, by the second far-end hybrid interface, compound frame is sent to the first far-end hybrid interface of far-end WDM-PON optical module; Each far-end WDM-PON optical module carries out electro-optical conversion to compound frame, forms the uplink optical signal of ODN specified wavelength, and uplink optical signal is sent to ODN, and the wavelength of the uplink optical signal that each far-end WDM-PON optical module sends is different; ODN, by uplink optical signals different for the wavelength that N number of far-end WDM-PON optical module is sent, is sent to the coupling public port of the coupler moved in solid Integrated access OLT by an optical fiber; N number of uplink optical signals different for wavelength, by N number of coupling shunting port, is sent to N number of parallel local side WDM-PON optical module by coupler; N number of parallel local side WDM-PON optical module carries out light-to-current inversion to the uplink optical signal received, form the up local side mixed signal in N road, by N number of second local side hybrid interface, up for N road local side mixed signal is sent to the first local side hybrid interface of local side relaying framing module; Local side relaying framing module is resolved the up local side mixed signal in N road, obtain N road up local side CPRI signal and N road up local side GE signal, export N road up local side GE signal by N number of first local side GE interface, export N road up local side CPRI signal by N number of local side trunk interface.

On the basis of technique scheme, the up-downgoing light signal that each coupling shunting port of described coupler is different from transmitting a pair wavelength between each local side WDM-PON optical module, the up-downgoing light signal that the coupling public port of coupler is different to wavelength from transmitting N between ODN, the wavelength interval of the up-downgoing light signal of each coupling shunting port is same constant.

On the basis of technique scheme, described local side relaying framing module comprises intersection submodule, intersection submodule, for: rearrange the port position that N part descending local side CPRI signal is corresponding, realize any a descending local side CPRI signal dispatching to move in solid Integrated access ONU to any one.

On the basis of technique scheme, described ODN is route type ODN, route type ODN comprises the cyclic array waveguide raster AWG of Wavelength routing type, feeder fiber and N number of branch optical fiber, periodically AWG comprises a route public port and N number of route diversion port, periodically the route public port of AWG is connected with the coupling public port of coupler by feeder fiber, and periodically N number of route diversion port of AWG is connected with N number of far-end WDM-PON optical module moved in solid Integrated access ONU respectively by N number of branch optical fiber;

Down direction: periodically the route public port of AWG receives the different downlink optical signal of N number of wavelength that coupler sends by feeder fiber, periodically AWG has wavelength division multiplexing/demultiplexing function, the downlink optical signal different to N number of wavelength carries out wavelength chooses, output to N number of branch optical fiber from N number of route diversion port respectively, be sent to N number of far-end WDM-PON optical module moved in solid Integrated access ONU respectively;

Up direction: periodically N number of route diversion port of AWG receives the uplink optical signal of each route diversion port specified wavelength that N number of far-end WDM-PON optical module moved in solid Integrated access ONU is sent respectively by N number of branch optical fiber, output to feeder fiber from route public port, be sent to the coupling public port of coupler.

On the basis of technique scheme, each route diversion port of described periodicity AWG is by transmitting the different up-downgoing light signal of a pair wavelength between N number of branch optical fiber from each far-end WDM-PON optical module, periodically the route public port of AWG is by transmitting the N up-downgoing light signal different to wavelength between feeder fiber and the coupling public port of coupler, and the wavelength interval of the up-downgoing light signal of each route diversion port is same constant.

On the basis of technique scheme, described ODN is ordinary power distribution type ODN, ordinary power distribution type ODN comprises power division type optical branching device OPS, feeder fiber and N number of branch optical fiber, power division type OPS is connected with the coupling public port of coupler by feeder fiber, power division type OPS is connected with N number of far-end WDM-PON optical module moved in solid Integrated access ONU respectively by N number of branch optical fiber, the far-end WDM-PON optical module that ordinary power distribution type ODN is corresponding comprises tunable filter, by tunable filter, wavelength chooses is carried out to downlink optical signal, only retain the downlink optical signal of specified wavelength, other N-1 of filtering downlink optical signal, according to wavelength or the secondary modulation information of the downlink optical signal retained, select the wavelength of corresponding uplink optical signal.

On the basis of technique scheme, described descending local side CPRI signal, descending far-end CPRI signal, up far-end CPRI signal, up local side CPRI signal include mobile service stream, mobile service stream adopts the structure of CPRI frame, the speed of CPRI frame is 614.4Mbps*J, J is 2,4,5,6,8 or 10.

On the basis of technique scheme, during described J=4, the speed of CPRI frame is 2.4576Gbps.

On the basis of technique scheme, described compound frame is the improvement of CPRI frame, and each compound frame comprises 16 words, each word comprises K byte, K is 2,4,5,6,8 or 10, and the frame structure of compound frame has periodically, and one-period is 1/ (3.84MHz).

On the basis of technique scheme, during described K=4, after 8 bits are encoded to 10 bit 8B/10B, the transmission rate of compound frame is 2.4576Gbps.

On the basis of technique scheme, the transmission rate of described compound frame has identical granularity with the transmission rate of CPRI frame, the speed of the speed >=CPRI signal of compound frame, J≤K.

On the basis of technique scheme, the 1st word in 16 words of described each compound frame is control word, 2nd ~ 16 words are data word, wherein, 2nd ~ L word is for carrying mobile service data, (L+1) ~ 16 word is for carrying fixed network services data, and L is positive integer, and 3≤L≤15.

On the basis of technique scheme, described mobile service data is made up of the data of multiple types, wherein a kind of standard is typical mobile service data multiplex mode, during L=12, the data of 2nd ~ 3 word carrying global system for mobile communications GSM standards, the data of 4th ~ 8 word carrying Time Division-Synchronous Code Division Multiple Access access TD_SCDMA standards, the data of 9th ~ 12 word carrying timesharing Long Term Evolution TD_LTE standards.

On the basis of technique scheme, the transmission sequence of the byte of described compound frame: the control word first transmitting compound frame one by one, then transmit the data word of compound frame one by one.

On the basis of technique scheme, in described compound frame, IEEE Standard 802.3-2002 standard is deferred in the bit distribution of each byte, namely transmits highest significant position MSB:bit 7 at first, finally transmits least significant bit LSB:bit0.

On the basis of technique scheme, each byte of described compound frame is encoded through 8B/10B, and form physics transfer sequence, this 8B/10B cataloged procedure defers to IEEE Standard802.3-2002 standard.

On the basis of technique scheme, form 10bit cipher code set " abcdeifghj " after described 8B/10B coding, transmit in the mode of serial data stream from " a " bit in cipher code set.

On the basis of technique scheme, during described L=12, the maximum mobile service data capacity that each compound frame can carry is 3.84*K*L*8=3.84 × 4 × 12 × 8=1474.56Mbps, and the maximum fixed network services data capacity that can carry is 3.84*K* (15-L) * 8=3.84 × 4 × (15-12) × 32=368.64Mbps.

On the basis of technique scheme, the encapsulation process of described compound frame is as follows: first encapsulate control word, mobile service data and fixed network services data respectively, form compound frame through time division multiplexing again, finally 8B/10B coding is carried out to compound frame, form the data of optical transport.

On the basis of technique scheme, described descending local side GE signal, descending far-end GE signal, up far-end GE signal, up local side GE signal include fixed network services stream, fixed network services stream has conventional P ON access network or all professional ability of Ethernet transmission frame, comprises business of networking, based on the voice call VOIP speech business of IP agreement and IPTV IPTV service.

On the basis of technique scheme, described N=8,16,32,40 or 64.

On the basis of technique scheme, described N=16, WDM-PON based on CPRI frame moves solid integrated access system and comprises BBU equipment, move solid Integrated access OLT, ODN and move solid Integrated access ONU, move solid Integrated access OLT and comprise local side Switching Module, local side relaying framing module, 16 parallel local side WDM-PON optical modules and coupler, local side Switching Module comprises connecting port on 16 the second local side GE interfaces and 1 Ethernet, 16 local side trunk interfaces of local side relaying framing module are connected with BBU equipment, 16 the first local side GE interfaces of local side relaying framing module are connected with 16 the second local side GE interfaces of local side Switching Module, on the Ethernet of local side Switching Module, connecting port is connected with apparatus back board.

On the basis of technique scheme, described BBU equipment, for:

Down direction: receive core net signal, carry out Base-Band Processing, be modulated into rf wireless signal, then carry out down-conversion, sampling and analog to digital conversion, obtain and export descending local side CPRI signal;

Up direction: receive up local side CPRI signal, carry out digital to analog conversion and up-conversion, obtain rf wireless signal, carry out Base-Band Processing after demodulation, forms core net signal and exports.

On the basis of technique scheme, described local side Switching Module, for:

Down direction: 1 ~ 2 the 10G signal sent by Ethernet first line of a couplet interface backboard, carries out Ethernet exchanging to 2 10G signals, obtains 16 road bureaus and holds descending gigabit Ethernet GE signal, is exported by 16 the second local side GE interfaces;

Up direction: hold up GE signal by 16 the second local side GE interface 16 road bureaus, hold up GE signal to carry out Ethernet exchanging to 16 road bureaus, pool 1 ~ 2 10G signal, output to backboard by connecting port on Ethernet.

On the basis of technique scheme, describedly move solid Integrated access ONU and comprise far-end analog front-end module, remote switching module, far-end framing module and far-end WDM-PON optical module, far-end analog front-end module comprises antenna and the second far-end IF interface, remote switching module comprises the second far-end GE interface, first far-end IF interface of far-end framing module is connected with the second far-end IF interface of far-end analog front-end module, and the first far-end GE interface of far-end framing module is connected with the second far-end GE interface of remote switching module.

On the basis of technique scheme, described far-end analog front-end module, for:

Down direction: receive descending far-end CPRI signal by the second far-end IF interface, carry out digital to analog conversion and up-conversion, obtain frequency analog wireless signal, and exported by antenna;

Up direction: the frequency analog wireless signal sent by antenna reception mobile phone, is carried out down-conversion, sampling and analog to digital conversion, obtains up far-end CPRI signal, and exported by the second far-end IF interface.

On the basis of technique scheme, described remote switching module, for:

Down direction: by the descending GE signal of the second far-end GE interface far-end, carry out Ethernet exchanging to the descending GE signal of far-end, pools 1 ~ 4 user's Fast Ethernet FE signal or 1 user GE signal exports;

Up direction: receive user's FE signal or user GE signal, carry out Ethernet exchanging, obtain the up GE signal of far-end, is exported by the second far-end GE interface.

Compared with prior art, advantage of the present invention is as follows:

(1) mobile service of operator and fixed network services can be accessed by the present invention simultaneously, both the demand that C-RAN technology high bandwidth, timing information requirement are strict had been met, meet again the transmission requirement of fixed network services, movement access and fixed network access are united two into one, simplify the structure of access network, can transmit mobile service and fixed network services, the degree of depth realizing operator's mobile radiotelephone signal covers simultaneously.

(2) the present invention adopts wavelength-division multiplex technique, the transmission rate of compound frame is up to 2.4576Gbps (Gigabit per second, Gigabits per second), the transmission capacity of moving solid integrated access system containing 16 optical modules, up to up-downgoing 39.3216Gbps, can save the trunk optical fiber resource of access network.

Accompanying drawing explanation

Fig. 1 is the structured flowchart moving solid integrated access system when ODN is route type structure in the embodiment of the present invention.

Fig. 2 is the structured flowchart moving solid integrated access system when ODN is power division type structure in the embodiment of the present invention.

Fig. 3 is the frame structure schematic diagram of compound frame in the embodiment of the present invention.

Fig. 4 is the protocol lay-ering structure schematic diagram of compound frame in the embodiment of the present invention.

Fig. 5 is the structured flowchart moving solid integrated access system containing 16 optical modules in the embodiment of the present invention.

Embodiment

Below in conjunction with drawings and the specific embodiments, the present invention is described in further detail.

WDM-PON based on CPRI frame moves solid integrated access system and comprises and move solid Integrated access OLT (Optical Line Terminal, optical line terminal), ODN (Optical DistributionNetwork, optical distribution network) and somely move solid Integrated access ONU, move solid Integrated access OLT to move solid Integrated access ONU by ODN be connected with some, move solid Integrated access OLT and comprise local side relaying framing module, N number of parallel local side WDM-PON optical module and coupler, N is positive integer, and 8≤N≤64, such as: N=8, 16, 32, 40 or 64, local side relaying framing module is connected with coupler by N number of parallel local side WDM-PON optical module, eachly move solid Integrated access ONU and comprise far-end framing module and far-end WDM-PON optical module, the coupler moved in solid Integrated access OLT is connected with each far-end WDM-PON optical module moved in solid Integrated access ONU by ODN, local side relaying framing module comprises N number of local side trunk interface, N number of first local side GE interface and N number of first local side hybrid interface, each local side WDM-PON optical module comprises 1 the second local side hybrid interface, coupler comprises a coupling public port and N number of coupling shunting port (ch1, ch2, chN), each far-end WDM-PON optical module comprises 1 the first far-end hybrid interface, far-end framing module comprises 1 the second far-end hybrid interface, 1 the first far-end IF interface and 1 the first far-end GE (Gigabit Ethernet, gigabit Ethernet) interface.

On the above-mentioned basis moving solid integrated access system, the embodiment of the present invention provides a kind of WDM-PON based on CPRI frame to move solid Integrated access method, comprises the following steps:

Down direction (from moving solid Integrated access OLT to the signal transmission direction of moving solid Integrated access ONU): move local side relaying framing module solid Integrated access OLT and receive N part for the descending local side CPRI signal of mobile service and N part descending local side GE signal for fixed network services, by every a descending local side CPRI signal and every a descending local side GE signal Reseal in a compound frame, form N number of compound frame, the speed of the speed >=CPRI signal of compound frame, N number of compound frame is mail to the second local side hybrid interface of N number of parallel local side WDM-PON optical module by local side relaying framing module respectively by the first local side hybrid interface, N number of compound frame is modulated into the different N number of downlink optical signal of wavelength by N number of parallel local side WDM-PON optical module, by N root optical fiber, N number of downlink optical signals different for wavelength is sent to N number of coupling shunting port of coupler, N number of downlink optical signals different for wavelength is coupled to coupling public port and outputs to ODN by coupler, N number of downlink optical signals different for wavelength is sent to N number of far-end WDM-PON optical module moved in solid Integrated access ONU by ODN respectively, each far-end WDM-PON optical module carries out light-to-current inversion to the downlink optical signal received, form descending far-end mixed signal, descending far-end mixed signal is the compound frame being packaged with CPRI signal and GE signal, by the first far-end mixed signal interface, compound frame is sent to the second far-end mixed signal interface of far-end framing module, far-end framing module is resolved the compound frame received, and obtains the descending far-end CPRI signal for mobile service and the descending far-end GE signal for fixed network services,

Up direction (from moving solid Integrated access ONU to the signal transmission direction of moving solid Integrated access OLT): each far-end framing module of moving solid Integrated access ONU receives the up far-end CPRI signal for mobile service and the up far-end GE signal for fixed network services, by up far-end CPRI signal and up far-end GE signal assemble in a compound frame, form compound frame, by the second far-end hybrid interface, compound frame is sent to the first far-end hybrid interface of far-end WDM-PON optical module; Each far-end WDM-PON optical module carries out electro-optical conversion to compound frame, forms the uplink optical signal of ODN specified wavelength, and uplink optical signal is sent to ODN, and the wavelength of the uplink optical signal that each far-end WDM-PON optical module sends is different; ODN, by uplink optical signals different for the wavelength that N number of far-end WDM-PON optical module is sent, is sent to the coupling public port of the coupler moved in solid Integrated access OLT by an optical fiber; N number of uplink optical signals different for wavelength, by N number of coupling shunting port, is sent to N number of parallel local side WDM-PON optical module by coupler; N number of parallel local side WDM-PON optical module carries out light-to-current inversion to the uplink optical signal received, form the up local side mixed signal in N road, by N number of second local side hybrid interface, up for N road local side mixed signal is sent to the first local side hybrid interface of local side relaying framing module; Local side relaying framing module is resolved the up local side mixed signal in N road, obtain N road up local side CPRI signal and N road up local side GE signal, export N road up local side GE signal by N number of first local side GE interface, export N road up local side CPRI signal by N number of local side trunk interface.

The up-downgoing light signal that each coupling shunting port of coupler is different from transmitting a pair wavelength between each local side WDM-PON optical module, the up-downgoing light signal that the coupling public port of coupler is different to wavelength from transmitting N between ODN, the wavelength interval of the up-downgoing light signal of each coupling shunting port is same constant.

In order to flexible configuration business, intersection submodule can also be comprised in local side relaying framing module, intersection submodule, for: rearrange the port position that N part descending local side CPRI signal is corresponding, like this, even if local side WDM-PON optical module does not have the characteristic of Wavelength tunable, also any a descending local side CPRI signal dispatching can be moved in solid Integrated access ONU to any one.

ODN is divided into route type ODN and ordinary power distribution type ODN two kinds.

Shown in Figure 1, route type ODN comprises periodicity AWG (the Arrayed Waveguide Grating of Wavelength routing type, array waveguide grating), feeder fiber and N number of branch optical fiber, periodically AWG comprise a route public port and N number of route diversion port (ch1 ', ch2 ', chN '), periodically the route public port of AWG is connected with the coupling public port of coupler by feeder fiber, and periodically N number of route diversion port of AWG is connected with N number of far-end WDM-PON optical module moved in solid Integrated access ONU respectively by N number of branch optical fiber.

Down direction: periodically the route public port of AWG receives the different downlink optical signal of N number of wavelength that coupler sends by feeder fiber, periodically AWG has wavelength division multiplexing/demultiplexing function, the downlink optical signal different to N number of wavelength carries out wavelength chooses, output to N number of branch optical fiber from N number of route diversion port respectively, be sent to N number of far-end WDM-PON optical module moved in solid Integrated access ONU respectively.

Periodically each route diversion port of AWG is by transmitting the different up-downgoing light signal of a pair wavelength between N number of branch optical fiber from each far-end WDM-PON optical module, periodically the route public port of AWG is by transmitting the N up-downgoing light signal different to wavelength between feeder fiber and the coupling public port of coupler, and the wavelength interval of the up-downgoing light signal of each route diversion port is same constant.

Shown in Figure 2, ordinary power distribution type ODN comprises power division type OPS (Optical Power Splitters, optical branching device), feeder fiber and N number of branch optical fiber, power division type OPS is connected with the coupling public port of coupler by feeder fiber, power division type OPS is connected with N number of far-end WDM-PON optical module moved in solid Integrated access ONU respectively by N number of branch optical fiber, the far-end WDM-PON optical module that ordinary power distribution type ODN is corresponding comprises tunable filter, by tunable filter, wavelength chooses is carried out to downlink optical signal, only retain the downlink optical signal of specified wavelength, other N-1 of filtering downlink optical signal, according to wavelength or the secondary modulation information of the downlink optical signal retained, select the wavelength of corresponding uplink optical signal.

Descending local side CPRI signal, descending far-end CPRI signal, up far-end CPRI signal, up local side CPRI signal include mobile service stream, mobile service stream adopts the structure of CPRI frame, the speed of CPRI frame is 614.4Mbps*J, J is 2,4,5,6,8 or 10, during J=4, the speed of CPRI frame is 2.4576Gbps.Mobile service stream have band roomy, time delay is little, TDV (Time Delay Variation, Delay Variation) little feature, carry timing information simultaneously, BBU (Building Base band Unit can be met, indoor baseband processing unit) with RRU (Radio Remote Unit, Remote Radio Unit) between the transmission requirement of C-RAN.Descending local side GE signal, descending far-end GE signal, up far-end GE signal, up local side GE signal include fixed network services stream, fixed network services stream has conventional P ON access network or all professional ability of Ethernet transmission frame, comprise business of networking, VOIP (Voice over Internet Protocol, voice call based on IP agreement) speech business and IPTV (Internet Protocol Television, Internet Protocol Television/IPTV) business etc.

Compound frame is the improvement of CPRI frame, shown in Figure 3, each compound frame comprises 16 words, each word comprises K byte, and K is 2,4,5,6,8 or 10, and the frame structure of compound frame has periodically, one-period (timeslice) is 1/ (3.84MHz), during K=4, after 8B/10B (8 bits are to 10 bits) coding, the transmission rate of compound frame is 2.4576Gbps.The transmission rate of compound frame has identical granularity with the transmission rate of CPRI frame, and the speed of the speed >=CPRI signal of compound frame, means J≤K.The 1st word in 16 words of each compound frame is control word, and 2nd ~ 16 words are data word, wherein, 2nd ~ L word is for carrying mobile service data, (L+1) ~ 16 word is for carrying fixed network services data, and L is positive integer, and 3≤L≤15.Mobile service data is made up of the data of multiple types, such as, wherein a kind of standard is typical mobile service data multiplex mode, for China Mobile's standard: during L=12, 2nd ~ 3 word carrying GSM (Global System forMobile Communications, global system for mobile communications) data of standard, 4th ~ 8 word carrying TD_SCDMA (Time Division-Synchronous Code DivisionMultiple Access, Time Division-Synchronous Code Division Multiple Access accesses) data of standard, 9th ~ 12 word carrying TD_LTE (Time Division Long Term Evolution, timesharing Long Term Evolution) data of standard.

Shown in Figure 3, a round dot represents a byte, and arrow represents the transmission sequence of byte: the control word first transmitting compound frame one by one, then transmits the data word of compound frame one by one.Bit in compound frame in each byte distributes defers to IEEE Standard 802.3-2002 standard, namely MSB (Most Significant Bit is transmitted at first, highest significant position): bit 7, finally transmit LSB (Least Significant Bit, least significant bit): bit0.Each byte of compound frame is encoded through 8B/10B, form physics transfer sequence (coded data), this 8B/10B cataloged procedure defers to IEEE (Institute of Electrical and Electronics Engineers, IEEE-USA) Standard 802.3-2002 standard.Form 10bit cipher code set " abcdeifghj " after 8B/10B coding, transmit in the mode of serial data stream from " a " bit in cipher code set.During L=12, the maximum mobile service data capacity that each compound frame can carry is 3.84*K*L*8=3.84 × 4 × 12 × 8=1474.56Mbps, and the maximum fixed network services data capacity that can carry is 3.84*K* (15-L) * 8=3.84 × 4 × (15-12) × 32=368.64Mbps.

Shown in Figure 4, the encapsulation process of compound frame is as follows: first encapsulate control word, mobile service data and fixed network services data respectively, then forms compound frame through time division multiplexing, finally carries out 8B/10B coding to compound frame, forms the data of optical transport.

The embody rule scene of the embodiment of the present invention is described for N=16 below.

Shown in Figure 5, WDM-PON based on CPRI frame moves solid integrated access system and comprises BBU equipment, move solid Integrated access OLT, ODN and move solid Integrated access ONU, move solid Integrated access OLT and comprise local side Switching Module, local side relaying framing module, 16 parallel local side WDM-PON optical modules and coupler, local side Switching Module comprises connecting port on 16 the second local side GE interfaces and 1 Ethernet, 16 local side trunk interfaces of local side relaying framing module are connected with BBU equipment, 16 the first local side GE interfaces of local side relaying framing module are connected with 16 the second local side GE interfaces of local side Switching Module, on the Ethernet of local side Switching Module, connecting port is connected with apparatus back board.

BBU equipment, for:

Local side Switching Module, for:

Down direction: 1 ~ 2 the 10G signal sent by Ethernet first line of a couplet interface backboard, Ethernet exchanging is carried out to 2 10G signals, obtains 16 road bureaus and hold descending GE (GigabitEthernet, gigabit Ethernet, 1Gbps) signal, is exported by 16 the second local side GE interfaces;

Move solid Integrated access ONU and comprise far-end analog front-end module, remote switching module, far-end framing module and far-end WDM-PON optical module, far-end analog front-end module comprises antenna and the second far-end IF interface, remote switching module comprises the second far-end GE interface, first far-end IF interface of far-end framing module is connected with the second far-end IF interface of far-end analog front-end module, and the first far-end GE interface of far-end framing module is connected with the second far-end GE interface of remote switching module.

Far-end analog front-end module, for:

Remote switching module, for:

Down direction: by the descending GE signal of the second far-end GE interface far-end, carry out Ethernet exchanging to the descending GE signal of far-end, pools 1 ~ 4 user FE (Fast Ethernet, Fast Ethernet) signal or 1 user GE signal exports;

Those skilled in the art can carry out various modifications and variations to the embodiment of the present invention, if these amendments and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then these revise and modification also within protection scope of the present invention.

The prior art that the content do not described in detail in specification is known to the skilled person.

Claims

1. the WDM-PON based on CPRI frame moves a solid Integrated access method, it is characterized in that, comprises the following steps:

WDM-PON based on CPRI frame moves solid integrated access system and comprises and move solid Integrated access OLT, ODN and somely move solid Integrated access ONU, move solid Integrated access OLT to move solid Integrated access ONU by ODN be connected with some, move solid Integrated access OLT and comprise local side relaying framing module, N number of parallel local side WDM-PON optical module and coupler, N is positive integer, and 8≤N≤64, local side relaying framing module is connected with coupler by N number of parallel local side WDM-PON optical module, eachly move solid Integrated access ONU and comprise far-end framing module and far-end WDM-PON optical module, the coupler moved in solid Integrated access OLT is connected with each far-end WDM-PON optical module moved in solid Integrated access ONU by ODN, local side relaying framing module comprises N number of local side trunk interface, N number of first local side GE interface and N number of first local side hybrid interface, each local side WDM-PON optical module comprises 1 the second local side hybrid interface, coupler comprises a coupling public port and N number of coupling shunting port, each far-end WDM-PON optical module comprises 1 the first far-end hybrid interface, and far-end framing module comprises 1 the second far-end hybrid interface, 1 the first far-end IF interface and 1 the first far-end gigabit Ethernet GE interface,

2. move solid Integrated access method based on the WDM-PON of CPRI frame as claimed in claim 1, it is characterized in that: the up-downgoing light signal that each coupling shunting port of described coupler is different from transmitting a pair wavelength between each local side WDM-PON optical module, the up-downgoing light signal that the coupling public port of coupler is different to wavelength from transmitting N between ODN, the wavelength interval of the up-downgoing light signal of each coupling shunting port is same constant.

3. move solid Integrated access method based on the WDM-PON of CPRI frame as claimed in claim 1, it is characterized in that: described local side relaying framing module comprises intersection submodule, intersection submodule, for: rearrange the port position that N part descending local side CPRI signal is corresponding, realize any a descending local side CPRI signal dispatching to move in solid Integrated access ONU to any one.

4. move solid Integrated access method based on the WDM-PON of CPRI frame as claimed in claim 1, it is characterized in that: described ODN is route type ODN, route type ODN comprises the cyclic array waveguide raster AWG of Wavelength routing type, feeder fiber and N number of branch optical fiber, periodically AWG comprises a route public port and N number of route diversion port, periodically the route public port of AWG is connected with the coupling public port of coupler by feeder fiber, periodically N number of route diversion port of AWG is connected with N number of far-end WDM-PON optical module moved in solid Integrated access ONU respectively by N number of branch optical fiber,

5. move solid Integrated access method based on the WDM-PON of CPRI frame as claimed in claim 4, it is characterized in that: each route diversion port of described periodicity AWG is by transmitting the different up-downgoing light signal of a pair wavelength between N number of branch optical fiber from each far-end WDM-PON optical module, periodically the route public port of AWG is by transmitting the N up-downgoing light signal different to wavelength between feeder fiber and the coupling public port of coupler, and the wavelength interval of the up-downgoing light signal of each route diversion port is same constant.

6. move solid Integrated access method based on the WDM-PON of CPRI frame as claimed in claim 1, it is characterized in that: described ODN is ordinary power distribution type ODN, ordinary power distribution type ODN comprises power division type optical branching device OPS, feeder fiber and N number of branch optical fiber, power division type OPS is connected with the coupling public port of coupler by feeder fiber, power division type OPS is connected with N number of far-end WDM-PON optical module moved in solid Integrated access ONU respectively by N number of branch optical fiber, the far-end WDM-PON optical module that ordinary power distribution type ODN is corresponding comprises tunable filter, by tunable filter, wavelength chooses is carried out to downlink optical signal, only retain the downlink optical signal of specified wavelength, other N-1 of filtering downlink optical signal, according to wavelength or the secondary modulation information of the downlink optical signal retained, select the wavelength of corresponding uplink optical signal.

7. move solid Integrated access method based on the WDM-PON of CPRI frame as claimed in claim 1, it is characterized in that: described descending local side CPRI signal, descending far-end CPRI signal, up far-end CPRI signal, up local side CPRI signal include mobile service stream, mobile service stream adopts the structure of CPRI frame, the speed of CPRI frame is 614.4Mbps*J, J is 2,4,5,6,8 or 10.

8. move solid Integrated access method based on the WDM-PON of CPRI frame as claimed in claim 7, it is characterized in that: during described J=4, the speed of CPRI frame is 2.4576Gbps.

9. move solid Integrated access method based on the WDM-PON of CPRI frame as claimed in claim 7, it is characterized in that: described compound frame is the improvement of CPRI frame, each compound frame comprises 16 words, each word comprises K byte, K is 2,4,5,6,8 or 10, the frame structure of compound frame has periodically, and one-period is 1/ (3.84MHz).

10. move solid Integrated access method based on the WDM-PON of CPRI frame as claimed in claim 9, it is characterized in that: during described K=4, after 8 bits are encoded to 10 bit 8B/10B, the transmission rate of compound frame is 2.4576Gbps.

11. move solid Integrated access method based on the WDM-PON of CPRI frame as claimed in claim 9, it is characterized in that: the transmission rate of described compound frame has identical granularity with the transmission rate of CPRI frame, the speed of the speed >=CPRI signal of compound frame, J≤K.

12. move solid Integrated access method based on the WDM-PON of CPRI frame as claimed in claim 11, it is characterized in that: the 1st word in 16 words of described each compound frame is control word, 2nd ~ 16 words are data word, wherein, 2nd ~ L word is for carrying mobile service data, (L+1) ~ 16 word is for carrying fixed network services data, and L is positive integer, and 3≤L≤15.

13. move solid Integrated access method based on the WDM-PON of CPRI frame as claimed in claim 12, it is characterized in that: described mobile service data is made up of the data of multiple types, wherein a kind of standard is typical mobile service data multiplex mode, during L=12, the data of 2nd ~ 3 word carrying global mobile communication method GSM standards, the data of 4th ~ 8 word carrying Time Division-Synchronous Code Division Multiple Access access TD_SCDMA standards, the data of 9th ~ 12 word carrying timesharing Long Term Evolution TD_LTE standards.

14. move solid Integrated access method based on the WDM-PON of CPRI frame as claimed in claim 11, it is characterized in that: the transmission sequence of the byte of described compound frame: the control word first transmitting compound frame one by one, then transmit the data word of compound frame one by one.

15. move solid Integrated access method based on the WDM-PON of CPRI frame as claimed in claim 11, it is characterized in that: in described compound frame, IEEEStandard 802.3-2002 standard is deferred in the bit distribution of each byte, namely transmit highest significant position MSB:bit 7 at first, finally transmit least significant bit LSB:bit0.

16. move solid Integrated access method based on the WDM-PON of CPRI frame as claimed in claim 14, it is characterized in that: each byte of described compound frame is encoded through 8B/10B, form physics transfer sequence, this 8B/10B cataloged procedure defers to IEEE Standard802.3-2002 standard.

17. move solid Integrated access method based on the WDM-PON of CPRI frame as claimed in claim 16, it is characterized in that: form 10bit cipher code set " abcdeifghj " after described 8B/10B coding, transmit in the mode of serial data stream from " a " bit in cipher code set.

18. move solid Integrated access method based on the WDM-PON of CPRI frame as claimed in claim 12, it is characterized in that: during described L=12, the maximum mobile service data capacity that each compound frame can carry is 3.84*K*L*8=3.84 × 4 × 12 × 8=1474.56Mbps, and the maximum fixed network services data capacity that can carry is 3.84*K* (15-L) * 8=3.84 × 4 × (15-12) × 32=368.64Mbps.

19. move solid Integrated access method based on the WDM-PON of CPRI frame as claimed in claim 12, it is characterized in that: the encapsulation process of described compound frame is as follows: first encapsulate control word, mobile service data and fixed network services data respectively, compound frame is formed again through time division multiplexing, finally 8B/10B coding is carried out to compound frame, form the data of optical transport.

20. move solid Integrated access method based on the WDM-PON of CPRI frame as claimed in claim 1, it is characterized in that: described descending local side GE signal, descending far-end GE signal, up far-end GE signal, up local side GE signal include fixed network services stream, fixed network services stream has conventional P ON access network or all professional ability of Ethernet transmission frame, comprises business of networking, based on the voice call VOIP speech business of IP agreement and IPTV IPTV service.

21. move solid Integrated access method based on the WDM-PON of CPRI frame as claimed in claim 1, it is characterized in that: described N=8,16,32,40 or 64.

22. move solid Integrated access method based on the WDM-PON of CPRI frame as claimed in claim 21, it is characterized in that: described N=16, WDM-PON based on CPRI frame moves solid integrated access system and comprises BBU equipment, move solid Integrated access OLT, ODN and move solid Integrated access ONU, move solid Integrated access OLT and comprise local side Switching Module, local side relaying framing module, 16 parallel local side WDM-PON optical modules and coupler, local side Switching Module comprises connecting port on 16 the second local side GE interfaces and 1 Ethernet, 16 local side trunk interfaces of local side relaying framing module are connected with BBU equipment, 16 the first local side GE interfaces of local side relaying framing module are connected with 16 the second local side GE interfaces of local side Switching Module, on the Ethernet of local side Switching Module, connecting port is connected with apparatus back board.

23. move solid Integrated access method based on the WDM-PON of CPRI frame as claimed in claim 22, it is characterized in that: described BBU equipment, for:

24. move solid Integrated access method based on the WDM-PON of CPRI frame as claimed in claim 22, it is characterized in that: described local side Switching Module, for:

25. move solid Integrated access method based on the WDM-PON of CPRI frame as claimed in claim 22, it is characterized in that: described in move solid Integrated access ONU and comprise far-end analog front-end module, remote switching module, far-end framing module and far-end WDM-PON optical module, far-end analog front-end module comprises antenna and the second far-end IF interface, remote switching module comprises the second far-end GE interface, first far-end IF interface of far-end framing module is connected with the second far-end IF interface of far-end analog front-end module, first far-end GE interface of far-end framing module is connected with the second far-end GE interface of remote switching module.

26. move solid Integrated access method based on the WDM-PON of CPRI frame as claimed in claim 25, it is characterized in that: described far-end analog front-end module, for:

27. move solid Integrated access method based on the WDM-PON of CPRI frame as claimed in claim 25, it is characterized in that: described remote switching module, for: