CN202856848U - Expanding rate SHDSL (symmetrical high bite digital subscriber line) transmission module - Google Patents
Expanding rate SHDSL (symmetrical high bite digital subscriber line) transmission module Download PDFInfo
- Publication number
- CN202856848U CN202856848U CN 201220550013 CN201220550013U CN202856848U CN 202856848 U CN202856848 U CN 202856848U CN 201220550013 CN201220550013 CN 201220550013 CN 201220550013 U CN201220550013 U CN 201220550013U CN 202856848 U CN202856848 U CN 202856848U
- Authority
- CN
- China
- Prior art keywords
- interface
- shdsl
- interconnects
- data
- processing unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Landscapes
- Communication Control (AREA)
Abstract
The utility model discloses an expanding rate SHDSL (symmetrical high bite digital subscriber line) transmission module, and relates to the technical field of modem technology. A management information interface (4) and a control unit (1) of the expanding rate SHDSL transmission module are mutually connected, an expanded service interface module (5) and a data interface (2) are mutually connected, the control unit (1) and the data interface (2) are both mutually connected with an SHDSL processing unit (3), and the SHDSL processing unit (3) and a loop interface (6) are mutually connected. The expanding rate SHDSL transmission module disclosed by the utility model adopts the expanding rate transmission technology, and realizes point-to-point 64kbit/s-15296kbit/s bi-directional payload rate transmission and a transmission distance of 1-16km on a pair of twisted pair lines. The energy consumption is low.
Description
Technical field:
The utility model relates to the modulation-demodulation technique field, is specifically related to a kind of spreading rate SHDSL transport module.
Background technology:
For broadband access technology, that people are familiar is Asymmetrical Digital Subscriber Line ADSL (Asymmetrical Digital Subscriber Line), it can set up up 896kbit/s at a pair of general twisted-pair power cable, the descending asymmetric digital communi-cations link that reaches 8160kbit/s, this is fit to realize the asymmetric traffics such as Internet access and VOD very much.But also just because of the asymmetry of ADSL speed, so that existing much, the application of ADSL limits to.Particularly commercial broadband demand environment is two-way, a symmetrical traffic environment, and lower to the tolerance of performance inconsistency, the ADSL access technology more and more can not satisfy people to the demand of bandwidth and flow.So people begin to pay close attention to the SHDSL technology.
Nowadays popularizing gradually of broadband access, networked services has at a high speed become irreversible trend, although the optical fiber access is the best mode of accessing Internet, this needs a very long transient process.XDSL technology take SHDSL as the forward position will be the mainstream technology of China's broadband access within the quite a long time.
The symmetrical HDSL High-Speed Digital Subscriber Line of SHDSL (Symmetrical High bite Digital Subscriber Line) is twisted-pair feeder to be provided a kind of technology of transmitting bi-directional symmetrical band data business by what ITU-T defined at list, meet G.991.2 proposed standard of International Telecommunication Association, owing to adopting 16 level trellis coded pulse amplitude modulation (TC-PAM) technology of superior performance, compressed transmission spectrum, improved noiseproof feature, prolonged transmission range, so and ADSL, the HDSL technology has been compared obvious technical advantage.At present, adopting the SHDSL access technology can the symmetrical flank speed of transmitting be 8192kbit/s, and 64 level are adopted in modulation.Along with popularizing and the demand of high bandwidth more of gigabit Ethernet, can not satisfy bandwidth user's demand fully.
The utility model content:
The purpose of this utility model provides a kind of spreading rate SHDSL transport module, it adopts the spreading rate transmission technology, on a pair of twisted-pair feeder, realize the two-way net load speed rates of point-to-point 64kbit/s～15296kbit/s and 1～16 kilometer transmission range, energy consumption is low.
In order to solve the existing problem of background technology, the utility model is to adopt following technical scheme: it comprises control unit 1, data-interface 2, SHDSL processing unit 3, interface of management 4, the interface 5 of activating business, loop interface 6, interface of management 4 interconnects with control unit 1, the interface 5 of activating business interconnects with data-interface 2, control unit 1, data-interface 2 all interconnect with SHDSL processing unit 3, and SHDSL processing unit 3 interconnects with loop interface 6.
Described SHDSL processing unit 3 comprises parallel control interface 31, RAM random asccess memory 32, embedded controller 33, digital front-end dsp processor 34, ADC transducer 35, DAC digital analog converter 36, Echo Cancellation unit 37, circuit driver element 38, line interface 39, AUX interface 310, SDI serial data interface 311, clock unit 312, framing/solution frame 313, parallel control interface 31 respectively with RAM random asccess memory 32, embedded controller 33 interconnects, embedded controller 33 respectively with digital front-end dsp processor 34, SDI serial data interface 311, clock unit 312, framing/solution frame 313 interconnects, SDI serial data interface 311 respectively with AUX interface 310, framing/solution frame 313 interconnects, framing/solution frame 313 interconnects with digital front-end dsp processor 34, digital front-end dsp processor 34 respectively with ADC transducer 35, DAC digital analog converter 36 interconnects, ADC transducer 35 interconnects with Echo Cancellation unit 37, DAC digital analog converter 36 interconnects Echo Cancellation unit 37 with circuit driver element 38, circuit driver element 38 all interconnects with line interface 39.
Described control unit 1 adopts the CPU of low-power consumption, finish with firmware downloads invoke extensions rate mode, the sequential of control SHDSL processing unit from the pretrigger to the data pattern, management and control SHDSL processing unit, transmission EOC supervisory signal data after the SHDSL processing unit is synchronous; CPU is by parallel bus and SHDSL processing unit 3 information interactions, and the rear CPU that powers on to SHDSL processing unit 3, treats that the embedded controller 33 in the SHDSL processing unit 3 calls with firmware downloads.CPU invoke extensions rate mode, control SHDSL processing unit 3 enters the sequential of data pattern from pretrigger.In addition, CPU finishes the supervisory signal transmitting-receiving.CPU adopts the device of low-power consumption, so not only can satisfy the demand of domestic consumer, and can satisfy the demand of more low power consumers, can improve the reliability of transport module.
Described data-interface 2 adopts the fpga chip of low-power consumption, finish switching and the signal driver of SHDSL processing unit 3 and the multiple interface of activating business, the interface 5 of activating business can comprise cable voice port, Ethernet interface, multiservice interfaces such as interface, A interface and E1/E2 interface V.35.
Data-interface 2 is finished switching and the signal driver of SHDSL processing unit 3 and the multiple interface 5 of activating business, and the interface 5 sound intermediate frequency interfaces of activating business are finished the compression processing of audio signal reference format and given data-interface; Ethernet interface is finished the transmitting-receiving of Ethernet data, realizes encapsulation and the decapsulation of HDLC agreement; The switching of V.35 Interface realization impedance matching, level conversion, working mode change and clock etc.; A interface (line interface) with the integration of the AMI code of information signal and frame alignment command code and clock signal NRZ code to data-interface; E1/E2 Interface realization level and code conversion.
Data-interface 2 can with the interface 5 of activating business in cable voice port, Ethernet interface, V.35 interface, A interface and one or more interfaces of E1/E2 interface link to each other, and have the interface selection function.
In addition, adopt the FPGA of low-power consumption, also can reduce the power consumption of whole module.The interface selection function of FPGA can become park mode with obsolete interface configuration, further reduces module dissipation.
Described SHDSL processing unit 3 realize based on the ITU tissue G.991.2, G.994.1, G.997.1 the data of agreement regulation are processed and expansion TC-PAM modulation /demodulation function.Wherein expand the TC-PAM modulation level and not only can realize 4TC-PAM, 8TC-PAM, 16TC-PAM, 32TC-PAM, 64TC-PAM, but also can realize the modulation level of 128TC-PAM.6 Bit datas of each signal code carrying when adopting the modulation level of 128TC-PAM, thus can realize higher transmission rate; Therefore 1 Bit data of each signal code carrying can realize with lower transmission rate the more transmission range of teletransmission when adopting the 4TC-PAM modulation level; In conjunction with the spreading rate pattern, transmission rate is expanded to 64kbit/s～15296kbit/s, transmission range can reach 16 kilometers farthest.
The rear embedded controller that powers on configures each unit module; After loop was synchronous, embedded controller was inserted into the management information of receiving the EOC position of SHDSL frame; Serial data interface SDI is responsible for data transfer, and its transmission rate can be supported 64kbit/s～15296kbit/s.Framer is inserted into the data such as load data, EOC information and frame head in the SHDSL frame, and the deframer of receiving terminal puts forward load data and EOC information again.Digital front-end DSP comprises: the parts such as scrambler/descrambler, trellis coded modulation device, precoder and frequency spectrum shaping device.Scrambler is the data flow randomization, and for the correcting data error of two-forty provides convenience, the descrambler of receiving terminal becomes randomized data transaction SHDSL line frame formatted output again.The expansion trellis encoder becomes the serial bit stream data transformation of scrambler output K parallel bit word of m code-element period, and convolution coder is processed the parallel bit word, and output K+1 bit words is again with 2 of an in advance customization of K+1 bit input
K+1The mapper of level format, mapping relations according to certain bit and level can realize the mapping of 128 level, thereby each signal code can be carried 6 Bit datas, message transmission rate is brought up to 15296kbit/s, has set up the G.991.2 15296kbit/s speed of protocol extension.
The flow process that data are processed in the utility model is: the Ethernet data in management information and the interface of activating business as the flow process of example as follows:
The direction that business datum sends to analog network: Ethernet interface is chosen by data interface unit, the high-speed data-flow of Ethernet interface enters data-interface, data-interface passes through the TDM bus transfer to framer with this data flow, management information data reads by the serial ports of CPU, writes the processing unit to SHDSL with the form of parallel byte.Framer is encapsulated into into serial SHDSL frame with two paths of data, scrambler is transformed into the serial random code with serial SHDSL frame data, the expansion trellis encoder is gone here and there by the serial random code of scrambler output and rear output is processed in conversion and level mapping etc., output to analog network after the processing such as the precoding of data process, frequency spectrum shaping, receive direction is the inverse operation of sending direction.
The utility model adopts the spreading rate transmission technology, on a pair of twisted-pair feeder, realizes the two-way net load speed rates of point-to-point 64kbit/s～15296kbit/s and 1～16 kilometer transmission range, and energy consumption is low.
Description of drawings:
Fig. 1 is structural representation of the present utility model,
Fig. 2 is the flow chart that data are processed in the utility model.
Embodiment:
Referring to Fig. 1-Fig. 2, this embodiment adopts following technical scheme: it comprises control unit 1, data-interface 2, SHDSL processing unit 3, interface of management 4, the interface 5 of activating business, loop interface 6, interface of management 4 interconnects with control unit 1, the interface 5 of activating business interconnects with data-interface 2, control unit 1, data-interface 2 all interconnect with SHDSL processing unit 3, and SHDSL processing unit 3 interconnects with loop interface 6.
Described SHDSL processing unit 3 comprises parallel control interface 31, RAM random asccess memory 32, embedded controller 33, digital front-end dsp processor 34, ADC transducer 35, DAC digital analog converter 36, Echo Cancellation unit 37, circuit driver element 38, line interface 39, AUX interface 310, SDI serial data interface 311, clock unit 312, framing/solution frame 313, parallel control interface 31 respectively with RAM random asccess memory 32, embedded controller 33 interconnects, embedded controller 33 respectively with digital front-end dsp processor 34, SDI serial data interface 311, clock unit 312, framing/solution frame 313 interconnects, SDI serial data interface 311 respectively with AUX interface 310, framing/solution frame 313 interconnects, framing/solution frame 313 interconnects with digital front-end dsp processor 34, digital front-end dsp processor 34 respectively with ADC transducer 35, DAC digital analog converter 36 interconnects, ADC transducer 35 interconnects with Echo Cancellation unit 37, DAC digital analog converter 36 interconnects Echo Cancellation unit 37 with circuit driver element 38, circuit driver element 38 all interconnects with line interface 39.
Described control unit 1 adopts the CPU of low-power consumption, finish with firmware downloads invoke extensions rate mode, the sequential of control SHDSL processing unit from the pretrigger to the data pattern, management and control SHDSL processing unit, transmission EOC supervisory signal data after the SHDSL processing unit is synchronous; CPU is by parallel bus and SHDSL processing unit 3 information interactions, and the rear CPU that powers on to SHDSL processing unit 3, treats that the embedded controller 33 in the SHDSL processing unit 3 calls with firmware downloads.CPU invoke extensions rate mode, control SHDSL processing unit 3 enters the sequential of data pattern from pretrigger.In addition, CPU finishes the supervisory signal transmitting-receiving.CPU adopts the device of low-power consumption, so not only can satisfy the demand of domestic consumer, and can satisfy the demand of more low power consumers, can improve the reliability of transport module.
Described data-interface 2 adopts the fpga chip of low-power consumption, finish switching and the signal driver of SHDSL processing unit 3 and the multiple interface of activating business, the interface 5 of activating business can comprise cable voice port, Ethernet interface, multiservice interfaces such as interface, A interface and E1/E2 interface V.35.
Data-interface 2 is finished switching and the signal driver of SHDSL processing unit 3 and the multiple interface 5 of activating business, and the interface 5 sound intermediate frequency interfaces of activating business are finished the compression processing of audio signal reference format and given data-interface; Ethernet interface is finished the transmitting-receiving of Ethernet data, realizes encapsulation and the decapsulation of HDLC agreement; The switching of V.35 Interface realization impedance matching, level conversion, working mode change and clock etc.; A interface (line interface) with the integration of the AMI code of information signal and frame alignment command code and clock signal NRZ code to data-interface; E1/E2 Interface realization level and code conversion.
Data-interface 2 can with the interface 5 of activating business in cable voice port, Ethernet interface, V.35 interface, A interface and one or more interfaces of E1/E2 interface link to each other, and have the interface selection function.
In addition, adopt the FPGA of low-power consumption, also can reduce the power consumption of whole module.The interface selection function of FPGA can become park mode with obsolete interface configuration, further reduces module dissipation.
Described SHDSL processing unit 3 realize based on the ITU tissue G.991.2, G.994.1, G.997.1 the data of agreement regulation are processed and expansion TC-PAM modulation /demodulation function.Wherein expand the TC-PAM modulation level and not only can realize 4TC-PAM, 8TC-PAM, 16TC-PAM, 32TC-PAM, 64TC-PAM, but also can realize the modulation level of 128TC-PAM.6 Bit datas of each signal code carrying when adopting the modulation level of 128TC-PAM, thus can realize higher transmission rate; Therefore 1 Bit data of each signal code carrying can realize with lower transmission rate the more transmission range of teletransmission when adopting the 4TC-PAM modulation level; In conjunction with the spreading rate pattern, transmission rate is expanded to 64kbit/s～15296kbit/s, transmission range can reach 16 kilometers farthest.
The rear embedded controller that powers on configures each unit module; After loop was synchronous, embedded controller was inserted into the management information of receiving the EOC position of SHDSL frame; Serial data interface SDI is responsible for data transfer, and its transmission rate can be supported 64kbit/s～15296kbit/s.Framer is inserted into the data such as load data, EOC information and frame head in the SHDSL frame, and the deframer of receiving terminal puts forward load data and EOC information again.Digital front-end DSP comprises: the parts such as scrambler/descrambler, trellis coded modulation device, precoder and frequency spectrum shaping device.Scrambler is the data flow randomization, and for the correcting data error of two-forty provides convenience, the descrambler of receiving terminal becomes randomized data transaction SHDSL line frame formatted output again.The expansion trellis encoder becomes the serial bit stream data transformation of scrambler output K parallel bit word of m code-element period, and convolution coder is processed the parallel bit word, and output K+1 bit words is again with 2 of an in advance customization of K+1 bit input
K+1The mapper of level format, mapping relations according to certain bit and level can realize the mapping of 128 level, thereby each signal code can be carried 6 Bit datas, message transmission rate is brought up to 15296kbit/s, has set up the G.991.2 15296kbit/s speed of protocol extension.
The flow process that the data of this embodiment are processed is: the Ethernet data in management information and the interface of activating business as the flow process of example as follows:
The direction that business datum sends to analog network: Ethernet interface is chosen by data interface unit, the high-speed data-flow of Ethernet interface enters data-interface, data-interface passes through the TDM bus transfer to framer with this data flow, management information data reads by the serial ports of CPU, writes the processing unit to SHDSL with the form of parallel byte.Framer is encapsulated into into serial SHDSL frame with two paths of data, scrambler is transformed into the serial random code with serial SHDSL frame data, the expansion trellis encoder is gone here and there by the serial random code of scrambler output and rear output is processed in conversion and level mapping etc., output to analog network after the processing such as the precoding of data process, frequency spectrum shaping, receive direction is the inverse operation of sending direction.
This embodiment adopts the spreading rate transmission technology, on a pair of twisted-pair feeder, realizes the two-way net load speed rates of point-to-point 64kbit/s～15296kbit/s and 1～16 kilometer transmission range, and energy consumption is low.
Claims (2)
1. spreading rate SHDSL transport module, it is characterized in that it comprises control unit (1), data-interface (2), SHDSL processing unit (3), interface of management (4), the interface (5) of activating business, loop interface (6), interface of management (4) interconnects with control unit (1), the interface (5) of activating business interconnects with data-interface (2), control unit (1), data-interface (2) all interconnects with SHDSL processing unit (3), and SHDSL processing unit (3) interconnects with loop interface (6).
2. spreading rate SHDSL transport module according to claim 1, it is characterized in that described SHDSL processing unit (3) comprises parallel control interface (31), RAM random asccess memory (32), embedded controller (33), digital front-end dsp processor (34), ADC transducer (35), DAC digital analog converter (36), Echo Cancellation unit (37), circuit driver element (38), line interface (39), AUX interface (310), SDI serial data interface (311), clock unit (312), framing/solution frame (313), parallel control interface (31) interconnects with RAM random asccess memory (32) embedded controller (33) respectively, embedded controller (33) respectively with digital front-end dsp processor (34), SDI serial data interface (311), clock unit (312), framing/solution frame (313) interconnects, SDI serial data interface (311) respectively with AUX interface (310), framing/solution frame (313) interconnects, framing/solution frame (313) interconnects with digital front-end dsp processor (34), digital front-end dsp processor (34) respectively with ADC transducer (35), DAC digital analog converter (36) interconnects, ADC transducer (35) interconnects with Echo Cancellation unit (37), DAC digital analog converter (36) interconnects Echo Cancellation unit (37) with circuit driver element (38), circuit driver element (38) all interconnects with line interface (39).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220550013 CN202856848U (en) | 2012-10-25 | 2012-10-25 | Expanding rate SHDSL (symmetrical high bite digital subscriber line) transmission module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220550013 CN202856848U (en) | 2012-10-25 | 2012-10-25 | Expanding rate SHDSL (symmetrical high bite digital subscriber line) transmission module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202856848U true CN202856848U (en) | 2013-04-03 |
Family
ID=47987989
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220550013 Expired - Lifetime CN202856848U (en) | 2012-10-25 | 2012-10-25 | Expanding rate SHDSL (symmetrical high bite digital subscriber line) transmission module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202856848U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103780781A (en) * | 2012-10-25 | 2014-05-07 | 绵阳灵通电讯设备有限公司 | Expansion-rate symmetrical high bite digital subscriber line (SHDSL) transmission module |
| CN104410764A (en) * | 2014-12-22 | 2015-03-11 | 绵阳灵通电讯设备有限公司 | Multi-line pair adaptive assembly SHDSL (Symmetrical High bite Digital Subscriber Line) transmission module and realization method thereof |
-
2012
- 2012-10-25 CN CN 201220550013 patent/CN202856848U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103780781A (en) * | 2012-10-25 | 2014-05-07 | 绵阳灵通电讯设备有限公司 | Expansion-rate symmetrical high bite digital subscriber line (SHDSL) transmission module |
| CN103780781B (en) * | 2012-10-25 | 2017-06-23 | 四川灵通电讯有限公司 | Spreading rate SHDSL transport modules |
| CN104410764A (en) * | 2014-12-22 | 2015-03-11 | 绵阳灵通电讯设备有限公司 | Multi-line pair adaptive assembly SHDSL (Symmetrical High bite Digital Subscriber Line) transmission module and realization method thereof |
| CN104410764B (en) * | 2014-12-22 | 2017-10-03 | 四川灵通电讯有限公司 | A kind of multi-thread SHDSL transport modules and implementation method to adaptive convergence |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101447806A (en) | Power line modem | |
| WO2013130647A1 (en) | Passive optical network digital subscriber line convergence architecture | |
| CN101594363B (en) | Full-speed wired remote-transmission module | |
| CN101163148B (en) | Ethernet transmission method of supporting non-standard velocity and corresponding device and access equipment | |
| CN202856848U (en) | Expanding rate SHDSL (symmetrical high bite digital subscriber line) transmission module | |
| CN101383786A (en) | Method for implementing data interchange between optical network terminal and customer terminal using household gateway | |
| CN201349215Y (en) | Power line modem | |
| US6707822B1 (en) | Multi-session asymmetric digital subscriber line buffering and scheduling apparatus and method | |
| CN103780781B (en) | Spreading rate SHDSL transport modules | |
| WO2012037851A1 (en) | Method and system for accessing xdsl broadband supporting line-division-duplexing | |
| CN103532631A (en) | Pluggable GPON ONU (Gigabit Passive Optical Network Optical Network Unit) for local area network switch system | |
| CN103297636B (en) | A kind of based on SHDSL multicast communication device systems and method | |
| CN107770184B (en) | Multifunctional multiplexer of scattering communication system | |
| US7876813B2 (en) | Communication system, device and data transmission method | |
| CN204272237U (en) | A kind of multi-thread SHDSL transport module to adaptive convergence | |
| CN206596007U (en) | Fiber entering household converting system | |
| CN201018491Y (en) | Connecting structure for providing high speed broadband business in coaxial cable | |
| CN101399868B (en) | Multifunctional telephone device for IP voice communication | |
| CN202340257U (en) | Wire-based remote data-speech-transmission apparatus | |
| CN202772884U (en) | Asymmetric multi-business transmission device based on high voltage power line | |
| CN203911942U (en) | SHDSL high speed transmission module based on programmable on-chip system | |
| CN202696618U (en) | Modularized network type PHD optical transmitter and receiver | |
| CN101267368A (en) | A 2M networking distributed multi-channel IP convergence communication system | |
| CN220087293U (en) | Ethernet optical fiber transmission rate negotiation self-adaptive circuit | |
| CN201440683U (en) | ADSL modem with plastic optical fiber interface |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 621000 Sichuan Province, Mianyang high tech Zone Puming South East No. 111 Patentee after: SICHUAN NETOP TELECOM CO.,LTD. Address before: 621000 Sichuan Province, Mianyang high tech Zone Puming South East No. 111 Patentee before: MIANYANG NETOP TELECOM EQUIPMENT Co.,Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20130403 |
|
| CX01 | Expiry of patent term |