CN1472930A - Device and method for carrying wideband business by narrow band resource - Google Patents
Device and method for carrying wideband business by narrow band resource Download PDFInfo
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Abstract
The present invention discloses an apparatus for carrying out the wide-band business with the narrow-band resources and the method thereof. The apparatus comprises a wide-band business switching-in module, an ATM shunting/multiplexing module, a stratified ATM shunting/multiplexing module with auxiliary storage, a narrow-band frame mapping/de-mapping module, a frame mapping module with auxiliary storage and a narrow-band circuit interface module. The method gathers the data flow of the wide-band business and maps it into the frame structure of the corresponding narrow-band interface, which will be transmitted in a narrow-band circuit through the circuit interfaces. Said narrow-band interfaces are E1 or T1 interface, E3 interface, and IMA interface, said wide-band business switching-in modules are ADSL set, VDSL set and SHDSL set.
Description
Technical field
The present invention relates to the data communication field, specifically, relate to the apparatus and method of utilizing the narrowband resource carrying wideband business.
Background technology
In the local side access device of existing broadband, with local side circuit carrying ATM (Asynchronous Transfer Mode) cell, directly go up ATM or IP network after the tandem mostly.
Be embodied as example with asymmetric digital line (ADSL) service channel, general service channel solution as shown in Figure 1, Fig. 1 is that the broadband local side apparatus is directly gone up ATM net schematic diagram.In transmitting uplink data, the ADSL nest plate sends with cell format data by ATM layer universal test and the operation second standard physical interface to the ATM layer, after converging, ATM layer tap/Multiplexing module deliver to optical module, again by ATM net on the optical interface of 155M or 622M; In downlink data transmission, directly deliver to ATM layer tap/Multiplexing module with cell format from the downlink data of ATM net and carry out tap, deliver to the ADSL nest plate by ATM layer universal test and the operation second standard physical interface (UTOPIA L2) then and handle by the optical interface of 155M or 622M.
G.992.2 or the T1.413 standard among Fig. 1,, support G.992.1, as the ADSL nest plate of physical layer.At up direction: the ADSL nest plate with the ADSL modulation signal that receives amplify, filtering, A/D conversion, balanced, remove Cyclic Prefix, fast Fourier transform (FFT), go that mapping, TRELLIS decodes, unpack, deinterleave, RS decoding, cyclic redundancy check (CRC) (CRC check), remove frame, pass through UTOPIA L2 interface with cell format then and send to the ATM layer; At down direction: finish the process opposite with up direction, according to G.992.1, G.992.2 or the T1.413 standard finishes that framing, scrambler, CRC, RS to cell encodes, interweaves, packing, lattice (TRELLIS) coding, mapping, invert fast fourier transformation (IFFT), add Cyclic Prefix, D/A conversion, filtering and amplify, drive, at subscribers feeder output ADSL modulation signal.
The effect of ATM layer tap/Multiplexing module is to a plurality of adsl port polls on the physical layer by UTOPIA L2 interface requirement, realize row cell multiple connection and following row cell tap on a plurality of ports, export behind direct output or the buffer memory after the last row cell multiple connection, processing to following row cell is then read cell according to the state of port from the descending cell-buffering memory of correspondence, send to this port.
Optical module becomes electrical signal conversion light signal to pass through Optical Fiber Transmission, and optical module and optical fiber can be single modes, also can be multimode.
Referring to shown in Figure 2, Fig. 2 is that the broadband local side apparatus is directly gone up the IP network schematic diagram.In transmitting uplink data, the ADSL nest plate sends to the ATM layer with cell format by UTOPIA L2 interface, and ATM layer tap/Multiplexing module will converge by the MII interface and directly go up IP network after the back cell forms ethernet frame by fastethernet module.In downlink data transmission, downlink data from IP network is directly delivered to fastethernet module by fastethernet interface (FE), fastethernet module is to deliver to ATM layer tap/Multiplexing module after the ATM cell to carry out tap with the ethernet frame Structure Conversion, delivers to the ADSL nest plate by the UTOPIAL2 interface then and handles.FE can be the electricity mouth, also can be the light mouth, and this method also is applicable to gigabit Ethernet.
In sum, prior art is that the ADSL business datum is encapsulated in the ATM cell, and with the form of cell or form transmission, the exchange of mac frame, thereby finish the business such as broadband access network that ADSL inserts.
Because prior art uses ATM to be configured to the upstream Interface of light mouth or electricity mouth, therefore also will build the ATM transmission network, cable laying or optical fiber, construction cost costliness when building the ATM switching network; On the other hand, ADSL for some local low capacities uses, for example, number of users is less than or equal to 32, directly inserts ATM or the IP network cost is higher, therefore, if utilize idle narrowband resource to carry broadband business such as ADSL, satisfy under the bandwidth requirement, need not other investment, saved cost.
Summary of the invention
The object of the present invention is to provide a kind of device that utilizes the narrowband resource carrying wideband business,, satisfy the broadband application demand of low capacity to realize utilizing idle narrowband resource to carry the business in broadband.
Another object of the present invention provides a kind of implementation method of utilizing the narrowband resource carrying wideband business, and the method for utilizing the narrowband resource carrying wideband business just is provided by said apparatus.
It is provided by the invention that a kind of to utilize the device of narrowband resource carrying wideband business be like this:
A kind of device that utilizes the narrowband resource carrying wideband business, comprise the broadband services access module that Broad-band Modulated Signal and atm cell format data are changed mutually, ATM layer tap/Multiplexing module with difference multiple connection of up-downgoing cell and tap, the broadband services access module is joined by ATM layer universal test and the operation second standard physical interface (UTOPIA L2) and ATM layer tap/Multiplexing module, this device comprises that also the arrowband frame that atm cell format data and arrowband frame structure are changed mutually shines upon/separate mapping block, be used to insert the narrow bandline interface module (LIU) of local side network, wherein, described arrowband frame shines upon/separates mapping block and joins by ATM layer universal test and the operation second standard physical interface (UTOPIA L2) and described ATM layer tap/Multiplexing module, described narrow bandline interface module and arrowband frame shine upon/separate mapping block and join, and insert the local side network by the arrowband interface.
Described arrowband frame shines upon/separates mapping block and also comprises the plug-in memory of frame mapping block, and plug-in memory of this frame mapping block and arrowband frame shine upon/separate mapping block and join.
Described ATM layer tap/Multiplexing module also comprises the plug-in memory of ATM layer tap/Multiplexing module, and this plug-in memory of ATM layer tap/Multiplexing module and ATM layer tap/Multiplexing module join.
The nest plate that above-mentioned broadband services access module is adopted can be ADSL (Asymmetric Digital Subscriber Line) nest plate (ADSL), or very high bit rate digital subscriber line nest plate (VDSL), can also be single line high bitrate digital subscriber line nest plate (SHDSL:Single Pair High Bit Rate Digital Subscriber Line).
Each physical layer port of broadband services access module side in above-mentioned ATM layer tap/Multiplexing module has permanent virtual and connects (PVC), this permanent virtual connects the professional permanent virtual that comprises a carrying wideband business data flow at least and connects, the terminal management permanent virtual that can also comprise a carrying terminal management control data stream connects, to be used as management maintenance.
Preferably, described arrowband frame shines upon/separates mapping block and shines upon/separate mapping block for the E1 frame, and described narrow bandline interface module is an E1 line interface unit module, and described arrowband interface is the E1 interface; Perhaps, described arrowband frame shines upon/separates mapping block and shines upon/separate mapping block for the T1 frame, and described narrow bandline interface module is a T1 line interface unit module, and described arrowband interface is the T1 interface.
Preferably, it is that Inverse Multiplexing over ATM (IMA:InverseMultiplexing for ATM) frame shines upon/separate mapping block that described arrowband frame shines upon/separate mapping block, described narrow bandline interface is E1 or T1 line interface unit module, and described arrowband interface is the Inverse Multiplexing over ATM interface.
Preferably, described arrowband frame shines upon/separates mapping block and shines upon/separate mapping block for the E3 frame, and described narrow bandline interface is an E3 line interface unit module, and described arrowband interface is the E3 interface.This device can comprise further that one is used for business is carried out the Flow Control module of Flow Control and shaping, and this flow-control module shines upon/separate mapping block with the E3 frame, ATM layer tap/Multiplexing module links to each other respectively.This E3 frame shines upon/separates mapping block and can also join by ATM layer universal test and the operation first standard physical interface (UTOPIA L1) and described ATM layer tap/Multiplexing module.
A kind of method of narrowband resource carrying wideband business of utilizing provided by the invention is achieved in that
A kind of method of utilizing the narrowband resource carrying wideband business, may further comprise the steps to the narrow band transmission up direction at least in broadband access:
A. user's broadband signal sends to ATM layer tap/Multiplexing module by ATM layer universal test and the operation second standard physical interface (UTOPIA L2) after being treated to ATM cell by the broadband services access module;
B. the ATM cell from the broadband services interface module is converged by ATM layer tap/Multiplexing module, abandon illegal cell, be sent to the corresponding port that the arrowband frame shines upon/separate mapping block by ATM layer universal test with the operation second standard physical interface (UTOPIA L2) then;
C. the arrowband frame structure that mapping block is mapped as corresponding arrowband interface is shone upon/separated to the ATM cell that converges by the arrowband frame, and upload by the arrowband interface;
, may further comprise the steps at least to the broadband access down direction in narrow band transmission:
E. descending arrowband frame structure shines upon/separate mapping block by the arrowband frame to be separated and maps out the broadband ATM cell, and is sent to ATM layer tap/Multiplexing module by ATM layer universal test and the operation second standard physical interface (UTOPIA L2);
F. after the ATM cell of shining upon/separating mapping block from the arrowband frame is carried out tap by ATM layer tap/Multiplexing module, send to the broadband services access module by ATM layer universal test and the operation second standard physical interface (UTOPIA L2);
G. the broadband services interface module is modulated into analog signal with ATM cell and sends on the physical circuit.
Wherein, described step B further comprises the legitimacy of judging cell, and legal cell is cached in the plug-in memory of ATM layer tap/Multiplexing module.Described step C comprises that further the ATM cell that will converge is cached in the plug-in memory of frame mapping block, is mapped as the arrowband frame structure of corresponding arrowband interface again, uploads by the arrowband interface.
Described step e further comprises descending arrowband frame structure separated and is mapped to ATM cell and is cached in the plug-in memory of frame mapping block, shines upon/separates mapping block by the arrowband frame again and send to ATM layer tap/Multiplexing module by ATM layer universal test and the operation second standard physical interface (UTOPIA L2).Described step F comprises further ATM cell is cached in the plug-in memory of ATM layer tap/Multiplexing module that the result according to poll reads ATM cell simultaneously.
In addition, the described broadband ATM cell of step C is mapped to the arrowband frame structure and meets ITU-T mapping standard G.804; Step e is described separates from the arrowband frame structure that receives and maps out the broadband ATM cell and meet I.432.1 cell delineation agreement of ITU-T.
Separated by the arrowband frame structure that to map out ATM cell can be the webmaster cell, this webmaster cell is realized the function of inband network management by particular permanent virtual connections and system management module communication.
The present invention is treated to arrowband frame structure corresponding to the arrowband interface by using narrow bandline interface module and arrowband frame to shine upon/separate mapping block with the broadband ATM cell, adaptive according to interface flexible ground, existing arrowband, for example, when the arrowband interface is the E1 interface, ATM cell is mapped as the E1 frame structure, and when the arrowband interface was the E3 interface, ATM cell was mapped as the E3 frame structure, utilized existing resource like this, fully; By plug-in memory of ATM layer tap/Multiplexing module and the plug-in memory of frame mapping block are set, the inlet and the inconsistent problem of outlet data flow rate of arrowband interface have been solved, realized on existing arrowband interface, realizing broadband services, reduced investment, utilized idle narrowband resource carrying wideband business, realized satisfying the broadband application demand of low capacity with lower cost.
Description of drawings
Fig. 1 is that the broadband local side apparatus is directly gone up ATM net schematic diagram;
Fig. 2 is that the broadband local side apparatus is directly gone up the IP network schematic diagram;
Fig. 3 utilizes arrowband interface bearing broadband services schematic diagram for the present invention;
Fig. 4 utilizes the schematic diagram of E1 interface bearing ADSL business for the embodiment of the invention 1;
Fig. 5 is mapped as E1 frame structure schematic diagram for ATM cell among the embodiment 1;
Fig. 6 is the cell delineation state diagram of ATM cell among the embodiment 1;
Fig. 7 is for utilizing the professional schematic diagram of IMA interface bearing single line high bitrate digital subscriber line among the embodiment 2;
Fig. 8 is for utilizing the professional schematic diagram of E3 interface bearing ADSL among the embodiment 3.
Embodiment
For make purpose of the present invention, technical scheme, and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, the present invention is described in more detail.
Referring to shown in Figure 3, Fig. 3 utilizes arrowband interface bearing broadband services schematic diagram for the present invention.Finish broadband services access module that Broad-band Modulated Signal and atm cell format data change mutually by UTOPIA L2 interface with the up-downgoing cell respectively the ATM layer tap/Multiplexing module of multiple connection and tap join, the arrowband frame shines upon/separates mapping block and joins by UTOPIA L2 interface and described ATM layer tap/Multiplexing module, the narrow bandline interface module is shone upon/is separated mapping block with the arrowband frame and is connected, and inserts the local side network by the arrowband interface; Frame shines upon in the arrowband/and outside, the ATM layer tap/Multiplexing module outside of separating mapping block be respectively equipped with the plug-in memory of frame mapping block, the plug-in memory of ATM layer tap/Multiplexing module that joins with module separately, Synchronous Dynamic Random Access Memory (SDRAM) for example, static RAM (SRAM), synchronous static RAM (SSRAM), the buffer memory that is used for the up-downgoing ATM cell is to satisfy the rate adapted between each interface.
Among the figure, the broadband services access module is as physical layer, and its function is identical with the broadband services access module function of prior art.At up direction: the broadband services access module with the broadband services modulation signal that receives amplify, filtering, A/D conversion, balanced, remove Cyclic Prefix, fast Fourier transform (FFT), go that mapping, TRELLIS decodes, unpack, deinterleave, RS decoding, cyclic redundancy check (CRC) (CRC check), remove frame, pass through UTOPIA L2 interface with cell format then and send to the ATM layer; At down direction: finish the process opposite with up direction, finish that framing, scrambler, CRC, RS to cell encodes, interweaves, packing, TRELLIS coding, mapping, invert fast fourier transformation (IFFT), add Cyclic Prefix, D/A conversion, filtering and amplify, drive, at subscribers feeder output broadband services modulation signal.
ATM layer tap/Multiplexing module function is to a plurality of broadband services port polls on the physical layer, realizes row cell multiple connection and following row cell tap on a plurality of ports, so that multichannel broadband services stream is fitted to the arrowband interface.At least the professional PVC that comprises a carrying wideband business data flow at each physical layer port of broadband services processing nest plate side, the terminal management PVC that can also comprise a carrying terminal management control data stream, with management maintenance as terminal equipment, can also realize inband network management by specific PVC and system management module such as system CPU communication.
To be up direction be mapped as arrowband frame structure corresponding to the arrowband interface with the legal cell of broadband ATM that receives to the function that the arrowband frame shines upon/separate mapping block, and down direction is separated from the arrowband frame structure that receives and mapped out the broadband ATM cell.
The function of narrow bandline interface module is that frame data stream is linked on the narrow bandline.
Embodiment 1:
Be that embodiment describes to utilize E1 interface bearing ADSL business below.
Referring to shown in Figure 4, Fig. 4 utilizes the schematic diagram of E1 interface bearing ADSL business for the embodiment of the invention 1.ADSL nest plate 401 by UTOPIA L2 interface with the up-downgoing cell respectively the ATM layer tap/Multiplexing module 402 of multiple connection and tap join, the E1 frame shines upon/separates mapping block 403 and joins by UTOPIA L2 interface and described ATM layer tap/Multiplexing module 402, E1 line interface unit module 400 is shone upon/is separated mapping block 403 with the E1 frame and is connected, and inserts the local side network by the E1 interface; The outside of shining upon/separate mapping block 403 at the E1 frame is provided with the plug-in memory 405 of the frame mapping block that joins with it, is used for separating the ATM cell that maps out by the E1 frame structure on the ATM cell after the tandem and down direction on the buffer memory up direction; The outside of ATM layer tap/Multiplexing module 402 is provided with the coupled plug-in memory 404 of ATM layer tap/Multiplexing module, is used for the buffer memory ATM cell.Wherein, the function of ADSL nest plate 401 is same as the prior art.
Actual operating position according to the ADSL local side apparatus, the downlink bandwidth that being generally the user provides has only hundreds of Kbps, if utilize E1 to do the interface of local side equipment, for example, eight adsl ports go out one road E1, then the spendable outlet bandwidth of each adsl port is 1.92M ÷ 8=224K, can satisfy instructions for use substantially.Therefore, a plurality of adsl port polls on 402 pairs of physical layers of ATM layer tap/Multiplexing module are realized row cell multiple connection and following row cell tap on a plurality of ports, with multichannel for example the Business Stream of 32 road ADSL be fitted to several for example 4 e1 ports.
ATM layer tap/Multiplexing module 402 be as the ATM layer, provides UTOPIA L2 interface respectively in the ADSL side and the E1 side of ATM layer tap/Multiplexing module 402.Can support 2 permanent virtual to connect (PVC) at each physical layer port of the ADSL side of ATM layer tap/Multiplexing module 402, a PVC carrying ADSL user's data stream; Another PVC both can carry ADSL user's data stream, also can carry the terminal management control data stream to ADSL MODEM, as management maintenance.
ATM layer tap/Multiplexing module 402 data handling procedures are such:
Up direction, ADSL nest plate 401 are delivered to ATM layer tap/Multiplexing module 402 by UTOPIA L2 interface after the ADSL data conversion of multichannel is become atm cell stream; ATM layer tap/Multiplexing module 402 is cached to cell in first in first out (FIFO) buffer area in ATM layer tap/Multiplexing module 402, table look-up by the vpi/vci value of cell and to obtain new VPI/VCI, judge the legitimacy of cell simultaneously, with legal cell is that the required cell of user writes buffer memory 404 in the plug-in memory of ATM layer tap/Multiplexing module, be dealt into the E1 frame by UTOPIA L2 interface again and shine upon/separate mapping block, cell is broken into the E1 frame after connect transmission equipment on the corresponding port of line interface unit (LIU) module 403; For illegal cell, promptly the unwanted cell of user will be dropped;
Down direction and up similar, be that the E1 frame shines upon/separates mapping block by the E1 frame and solves ATM cell behind LIU, ATM layer tap/Multiplexing module 402 receives the cell that extracts from the E1 frame structure by UTOPIA L2 interface, according to port numbers and VPI/VCI, table look-up by the vpi/vci value of cell and to obtain new VPI/VCI, again cell is deposited in the plug-in memory 404 of ATM layer tap/Multiplexing module, result according to poll reads cell and sends to ADSL nest plate 401 simultaneously, is transformed to analog signal and sends on the subscriber's line.
Except the ADSL user data cell of up-downgoing, ATM layer tap/Multiplexing module 402 also and support a webmaster PVC between system CPU.Its process is: system CPU sends to ATM layer tap/Multiplexing module 402 with the webmaster cell by UTOPIA L2 interface, similarly, table look-up and change VPI/VCI after with the cell buffer memory, send to the corresponding port that the E1 frame shines upon/separate mapping block 403, E1 line interface unit module 400 by UTOPIA L2 interface again, be fitted on the E1 circuit.Rightabout is done similar processing.
The function that the E1 frame shines upon/separate mapping block 403 is: up direction, will be mapped to the E1 frame from the ATM cell of ATM layer tap/Multiplexing module, and in the E1 signal, transmit; Down direction is separated from the E1 signal flow and is mapped out ATM cell.The function of E1 line interface unit module 400 be with the E1 frame chaining to the E1 interface.
Wherein, up direction, ATM cell meets ITU-T standard G.804 to the mapping mode of E1 signal.The Digital Transmission speed of E1 signal is 2.048Mbit/s, transmits data 2048 * 0.125 ÷ 8=32 bytes in per 125 μ s time intervals, and 32 bytes are formed a frame.Referring to shown in Figure 5, Fig. 5 is mapped as E1 frame structure schematic diagram for ATM cell among the embodiment 1.When the E1 system is used to transmit ATM cell, the whole time slots of use except that time slot 0 and time slot 16, be that ATM cell can be mapped to any N time slot in 30 time slots except that time slot 0 and time slot 16 of E1 frame, time slot 1～time slot 15 as shown in Figure 5 and time slot 17～time slot 31, transfer rate reaches 30 * 64kbit/s=1920kbit/s.Time slot 0 is used for the transmission of frame synchronization, oam (OAM) monitoring, Far End Receive Failure (FERF) and linked object code (LOC), and time slot 16 is used for signaling and transmits.When being mapped to the ATM cell speed deficiency 1920kbit/s of E1 frame, use idle cell to fill.First time slot of ATM mapping is configured to ATM with reference to time slot; Ensuing mapping time slot is configured to subsequent timeslot, and the time slot of not using is idle time slot.
Down direction is separated the demarcation method that maps out ATM cell and is met the ITU-TI.432.1 agreement from the E1 signal flow.Referring to shown in Figure 6, Fig. 6 is the cell delineation state diagram of ATM cell among the embodiment 1.In the search attitude, the signal that receives is carried out head error control (HEC) check, because byte is effective before cell delineation, so the search attitude of cell delineation state machine is to carry out in byte-by-byte mode, needn't be according to carrying out cell delineation by bit.After having found a correct HEC assay, enter the presynchronization attitude, at this state, think the border that has had been found that cell, and find next letter head to carry out HEC according to this border and check, if find that continuously the HEC check of δ cell is all correct, then enter synchronous state, if in this process, find the mistake of a HEC check, then get back to the search attitude.At synchronous state, carry out the HEC check by cell, after finding continuous α incorrect HEC assay, get back to the search attitude.α and δ parameter can be 0～15 by register configuration.When cell delineation state machine during not at synchronous state, the cell of reception will be dropped.
In the foregoing description, also can be used for the narrowband resource of T1 interface, correspondingly, with the E1 frame shine upon/separate mapping block, E1 line interface unit module is transformed to the T1 frame respectively and shines upon/separate mapping block, T1 line interface unit module.
Embodiment 2:
Referring to shown in Figure 7, Fig. 7 utilizes the professional schematic diagram of IMA interface bearing single line high bitrate digital subscriber line (SHDSL) among the embodiment 2.SHDSL nest plate 701 by UTOPIA L2 interface with the up-downgoing cell respectively the ATM layer tap/Multiplexing module 702 of multiple connection and tap join, ima frame shines upon/separates mapping block 703 and joins by UTOPIA L2 interface and ATM layer tap/Multiplexing module 702, IMA line interface unit module 700 and ima frame shine upon/separate mapping block 703 and join, and insert the local side network by the IMA interface; The outside of shining upon/separate mapping block 703 at ima frame is provided with the plug-in memory 705 of the frame mapping block that joins with it, is used for separating the ATM cell that maps out by the ima frame structure on the ATM cell after the tandem and down direction on the buffer memory up direction; Be provided with the plug-in memory 704 of ATM layer tap/Multiplexing module that joins with it in ATM layer tap/Multiplexing module 702 outsides, be used for the buffer memory ATM cell.
Wherein, the function of SHDSL nest plate 701 and ADSL nest plate 401 functional similarities, ima frame shine upon/separate mapping block 703 and shine upon/separate mapping block 403 functional similarities with E1 frame among the embodiment 1.
Embodiment 3:
Referring to shown in Figure 8, Fig. 8 is for utilizing the professional schematic diagram of E3 interface bearing ADSL among the embodiment 3.ADSL nest plate 801 by UTOPIA L2 interface with the up-downgoing cell respectively the ATM layer tap/Multiplexing module 802 of multiple connection and tap join, the E3 frame shines upon/separates mapping block 803 and joins by UTOPIA L2 interface or UTOPIA L1 and ATM layer tap/Multiplexing module 802, E3 line interface unit module 800 and E3 frame shine upon/separate mapping block 803 and join, and insert the local side network by the E3 interface; The outside of shining upon/separate mapping block 803 at the E3 frame is provided with the plug-in memory 805 of the frame mapping block that joins with it, is used for separating the ATM cell that maps out by the E3 frame structure on the ATM cell after the tandem and down direction on the buffer memory up direction; Be provided with the plug-in memory 804 of ATM layer tap/Multiplexing module that joins with it in the outside of ATM layer tap/Multiplexing module 802, be used for the buffer memory ATM cell.
Because the Digital Transmission speed of E3 interface is equivalent to 16 E1, be control variable bit rate and bursty traffic, shaping peace current stabilization amount, thereby support constant bit rate (CBR), variable bit rate (VBR, comprise real-time variable bit rate (rt-VBR), Non-Real Time Variable Bit Rate (nrt-VBR)), can reach bit rate (ABR), specified bit rate different service types such as (UBR) not, here be provided with the E3 frame and shine upon/separate the Flow Control module 806 that mapping block 803 and ATM layer tap/Multiplexing module 802 join, business is carried out dispatching management by it, flow control and priority, drop policy etc.This flow-control mechanism also can be used on embodiment 2 and utilizes in the scheme of IMA interface bearing broadband services, and other scheme also can be selected to use as required.
Among the figure, ADSL nest plate 801 and ATM layer tap/Multiplexing module 802 respectively with embodiment 1 in ADSL nest plate 401 identical with ATM layer tap/Multiplexing module 402 functions.
The function that the E3 frame shines upon/separate mapping block 803 is a up direction, will be mapped to the E3 frame from the ATM cell of ATM layer tap/Multiplexing module, transmits in the E3 signal; Down direction is separated from the frame structure of E3 signal flow and is mapped out ATM cell.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (19)
1, a kind of device that utilizes the narrowband resource carrying wideband business, comprise the broadband services access module that Broad-band Modulated Signal and atm cell format data are changed mutually, ATM layer tap/Multiplexing module with difference multiple connection of up-downgoing cell and tap, the broadband services access module is joined by ATM layer universal test and the operation second standard physical interface and ATM layer tap/Multiplexing module, it is characterized in that, this device comprises that also the arrowband frame that atm cell format data and arrowband frame structure are changed mutually shines upon/separate mapping block, be used to insert the narrow bandline interface module of local side network, wherein, described arrowband frame shines upon/separates mapping block and joins by ATM layer universal test and the operation second standard physical interface and described ATM layer tap/Multiplexing module, described narrow bandline interface module and arrowband frame shine upon/separate mapping block and join, and insert the local side network by the arrowband interface.
2, device according to claim 1 is characterized in that, described arrowband frame shines upon/separates mapping block and also comprises the plug-in memory of frame mapping block, and plug-in memory of this frame mapping block and arrowband frame shine upon/separate mapping block and join.
3, device according to claim 1 is characterized in that, described ATM layer tap/Multiplexing module also comprises the plug-in memory of ATM layer tap/Multiplexing module, and this plug-in memory of ATM layer tap/Multiplexing module and ATM layer tap/Multiplexing module join.
4, according to claim 1,2 or 3 described devices, it is characterized in that, described arrowband frame shines upon/separates mapping block and shines upon/separate mapping block for the E1 frame, and described narrow bandline interface module is an E1 line interface unit module, and described arrowband interface is the E1 interface.
5, according to claim 1,2 or 3 described devices, it is characterized in that, described arrowband frame shines upon/separates mapping block and shines upon/separate mapping block for the T1 frame, and described narrow bandline interface module is a T1 line interface unit module, and described arrowband interface is the T1 interface.
6, according to claim 1,2 or 3 described devices, it is characterized in that, described arrowband frame shines upon/separates mapping block and shines upon/separate mapping block for the Inverse Multiplexing over ATM frame, and described narrow bandline interface is E1 or T1 interface unit module, and described arrowband interface is the Inverse Multiplexing over ATM interface.
According to claim 1,2 or 3 described devices, it is characterized in that 7, described arrowband frame shines upon/separates mapping block and shines upon/separate mapping block for the E3 frame, described narrow bandline interface is an E3 line interface unit module, and described arrowband interface is the E3 interface.
8, device according to claim 7 is characterized in that, this device comprises that further one is used for business is carried out the Flow Control module of Flow Control and shaping, and this flow-control module shines upon/separate mapping block with the E3 frame, ATM layer tap/Multiplexing module links to each other respectively.
9, method according to claim 7 is characterized in that, described E3 frame shines upon/separates mapping block and can also join by ATM layer universal test and the operation first standard physical interface and described ATM layer tap/Multiplexing module.
10, device according to claim 1 is characterized in that, the nest plate that described broadband services access module adopts is the ADSL (Asymmetric Digital Subscriber Line) nest plate, or the very high bit rate digital subscriber line nest plate, or single line high bitrate digital subscriber line nest plate.
11, device according to claim 1, it is characterized in that, each physical layer port of broadband services access module side in described ATM layer tap/Multiplexing module has permanent virtual and connects, and this permanent virtual connects the professional permanent virtual that comprises a carrying wideband business data flow at least and connects.
12, device according to claim 11 is characterized in that, described permanent virtual connects the terminal management permanent virtual that further comprises carrying terminal management control data stream and connects.
13, a kind of method of utilizing the narrowband resource carrying wideband business is characterized in that,
, may further comprise the steps at least to the narrow band transmission up direction in broadband access:
A. user's broadband signal sends to ATM layer tap/Multiplexing module by ATM layer universal test and the operation second standard physical interface after being treated to ATM cell by the broadband services access module;
B. carry out multiple connection from the ATM cell of broadband services interface module by ATM layer tap/Multiplexing module and converge, abandon illegal cell, be sent to the corresponding port that the arrowband frame shines upon/separate mapping block with the operation second standard physical interface by ATM layer universal test;
C. the arrowband frame structure that mapping block is mapped as corresponding arrowband interface is shone upon/separated to the ATM cell that converges by the arrowband frame, and upload by the narrow bandline interface module;
, may further comprise the steps at least to the broadband access down direction in narrow band transmission:
E. the descending narrow band data narrow bandline interface of flowing through shines upon/separates mapping block by the arrowband frame and separates and map out ATM cell, and is sent to ATM layer tap/Multiplexing module by ATM layer universal test and the operation second standard physical interface;
F. after the ATM cell of shining upon/separating mapping block from the arrowband frame is carried out tap by ATM layer tap/Multiplexing module, send to the broadband services access module by ATM layer universal test and the operation second standard physical interface;
G. the broadband services interface module is modulated into analog signal with ATM cell and sends on the physical circuit.
14, method according to claim 13 is characterized in that, described step B further comprises the legitimacy of judging cell, and legal cell is cached in the plug-in memory of ATM layer tap/Multiplexing module.
15, method according to claim 13, it is characterized in that, described step C further comprises and is cached in the plug-in memory of frame mapping block with shone upon/separate the ATM cell that mapping block converges by frame, is mapped as the arrowband frame structure of corresponding arrowband interface again, uploads by the arrowband interface.
16, method according to claim 13, it is characterized in that, described step e further comprises descending arrowband frame structure separated and is mapped to ATM cell, be cached in the plug-in memory of frame mapping block earlier, shine upon/separate mapping block by the arrowband frame again and send to ATM layer tap/Multiplexing module by ATM layer universal test and the operation second standard physical interface.
17, method according to claim 13 is characterized in that, described step F comprises further ATM cell is cached in the plug-in memory of ATM layer tap/Multiplexing module that the result according to poll reads ATM cell simultaneously.
18, method according to claim 13 is characterized in that, the described ATM cell of step C is mapped to the arrowband frame structure and meets ITU-T mapping standard G.804; Step e is described to recover ATM cell and meets I.432.1 cell delineation agreement of ITU-T from the arrowband frame structure that receives.
19, method according to claim 13 is characterized in that, is separated by the arrowband frame structure that to map out ATM cell can be the webmaster cell, and this webmaster cell is by particular permanent virtual connections and system management module communication.
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| CN 02125858 CN1214573C (en) | 2002-07-30 | 2002-07-30 | Device and method for carrying wideband business by narrow band resource |
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| CN 02125858 CN1214573C (en) | 2002-07-30 | 2002-07-30 | Device and method for carrying wideband business by narrow band resource |
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| CN1472930A true CN1472930A (en) | 2004-02-04 |
| CN1214573C CN1214573C (en) | 2005-08-10 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1992731B (en) * | 2005-12-29 | 2010-04-21 | 上海贝尔阿尔卡特股份有限公司 | Access multiplexer of realizing multiple access modes with digital user line and method thereof |
| CN102647313A (en) * | 2012-05-14 | 2012-08-22 | 瑞斯康达科技发展股份有限公司 | Network testing system |
| CN110167069A (en) * | 2019-04-16 | 2019-08-23 | 国网浙江省电力有限公司绍兴供电公司 | A kind of more Narrowband wireless terminals polyplants applied to electric power wireless private network |
| CN111586246A (en) * | 2020-04-28 | 2020-08-25 | 深圳震有科技股份有限公司 | PTM compatible ADSL and VDSL processing method, equipment and medium |
-
2002
- 2002-07-30 CN CN 02125858 patent/CN1214573C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1992731B (en) * | 2005-12-29 | 2010-04-21 | 上海贝尔阿尔卡特股份有限公司 | Access multiplexer of realizing multiple access modes with digital user line and method thereof |
| CN102647313A (en) * | 2012-05-14 | 2012-08-22 | 瑞斯康达科技发展股份有限公司 | Network testing system |
| CN102647313B (en) * | 2012-05-14 | 2015-08-05 | 瑞斯康达科技发展股份有限公司 | A kind of network test system |
| CN110167069A (en) * | 2019-04-16 | 2019-08-23 | 国网浙江省电力有限公司绍兴供电公司 | A kind of more Narrowband wireless terminals polyplants applied to electric power wireless private network |
| CN111586246A (en) * | 2020-04-28 | 2020-08-25 | 深圳震有科技股份有限公司 | PTM compatible ADSL and VDSL processing method, equipment and medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1214573C (en) | 2005-08-10 |
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