WO2011000273A1 - 芯片预加重和均衡参数的动态调整方法及装置 - Google Patents
芯片预加重和均衡参数的动态调整方法及装置 Download PDFInfo
- Publication number
- WO2011000273A1 WO2011000273A1 PCT/CN2010/074158 CN2010074158W WO2011000273A1 WO 2011000273 A1 WO2011000273 A1 WO 2011000273A1 CN 2010074158 W CN2010074158 W CN 2010074158W WO 2011000273 A1 WO2011000273 A1 WO 2011000273A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- board
- transmission line
- length
- mapping relationship
- type
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/80—Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups H04B10/03 - H04B10/70, e.g. optical power feeding or optical transmission through water
- H04B10/801—Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups H04B10/03 - H04B10/70, e.g. optical power feeding or optical transmission through water using optical interconnects, e.g. light coupled isolators, circuit board interconnections
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
Definitions
- the present invention relates to the field of optical transmission technologies, and in particular, to a method and apparatus for dynamically adjusting chip pre-emphasis and equalization parameters in an optical transmission device.
- the backplane of the optical transmission device is inserted with a main control board and a plurality of boards of different types of chips.
- the main control board manages all the boards on the backplane.
- the message signals between the board chips are transmitted through the transmission line, and the total length of the transmission lines between the boards is accumulated by both the backplane transmission line and the single board transmission line. Due to signal attenuation and distortion caused by transmission line impedance and intersymbol interference, the message signal will have some distortion during transmission.
- a pre-emphasis and equalization technique was introduced.
- the pre-emphasis technique refers to pre-compensating the signal at the transmitting end according to the attenuation curve, so that the receiving end can obtain an ideal message signal.
- Equalization refers to the equalization of channel characteristics, that is, the equalizer at the receiving end produces characteristics opposite to the channel characteristics, which are used to reduce or eliminate inter-symbol interference caused by the time-varying multipath propagation characteristics of the channel. Therefore, we adjust the amplitude and ratio of the pre-emphasis at the transmitting end, and adjust the equalization according to the equalization parameter to the received message signal at the receiving end.
- the board position, board type, or board chip type are dynamically adjusted.
- the total length of the transmission line changes with this dynamic adjustment.
- the amplitude of the chip pre-emphasis and equalization adjustment also needs to be based on this. Change with dynamic adjustment.
- the main control board dynamically adjusts the chip pre-emphasis and equalization parameters according to the dynamic adjustment and notifies the board in time to enable the board to adjust the message signal according to the adjusted parameters. solution. Summary of the invention
- the technical problem to be solved by the present invention is to provide a dynamic adjustment method for chip pre-emphasis and equalization parameters, and a corresponding dynamic adjustment device, so that the main control board can dynamically adjust the chip pre-emphasis and equalization parameters and notify each board in time. Ensure that the board can enter the message according to the adjusted parameters. Line adjustment, thereby improving the quality of message signal transmission.
- the present invention uses the following solutions:
- a method for dynamic adjustment of chip pre-emphasis and equalization parameters in an optical transmission device includes a backplane, a main control board inserted on the backplane, and various types of boards, and the method includes:
- the element mapping relationship table includes at least a mapping relationship between a transmission line number of the slot on the backplane and a transmission line number of the backplane, and transmission line information of the boards of the types; and the optical transmission device
- the board information is adjusted, the total length of the transmission line between the connected boards is recalculated according to the adjusted board information and the element mapping relationship table; and according to the total length of the transmission line and the connected list
- the chip type of the board recalculates the pre-emphasis and equalization parameter values and delivers them to the boards.
- the board information includes a board type, a chip type, and a board position of the board.
- the entry of the element mapping relationship table includes: a board position of the board, a board type of the board, a chip type of the board, a transmission line number of the board, a transmission line length of the board, and a back The transmission line number of the board, the length of the transmission line of the backplane, the board position of the board 2, the board type of the board 2, the chip type of the board 2, the transmission line number of the board 2, and the transmission line length of the board 2.
- the step of recalculating the total length of the transmission line between the connected boards according to the adjusted board information and the element mapping relationship table includes:
- the element mapping relationship table is searched according to the board type, the chip type, and the board position of the adjusted board, and the transmission line length and the single board of the board 1 are obtained.
- the length of the transmission line of the board 1 and the length of the transmission line of the corresponding board are calculated.
- the element mapping relationship table includes a mapping table 1 and a mapping table 2;
- the entry of the mapping table 1 includes: a board position of the board, a transmission line number of the board, a transmission line number of the back board, a transmission line length of the back board, a board position of the board 2, and a transmission line of the board 2
- the entry of the mapping table includes: a board type, a board chip type, a transmission line number of the board, and a transmission line length of the board.
- the step of recalculating the total length of the transmission line between the connected boards according to the adjusted board information and the element mapping relationship table includes:
- the mapping table 1 is searched according to the position of the board of the adjusted board 1 to obtain the transmission line number 2 and the board of the board 2 connected to the board. a transmission line number one and a corresponding backplane transmission line are long;
- the mapping table 2 is searched according to the board type and the chip type of the single board/board 2, and the transmission line length of the single board/board 2 when the transmission line number is one/two is obtained;
- a dynamic adjustment device for chip pre-emphasis and equalization parameters comprising: a mapping relationship establishing module, an adjustment information acquiring module and a parameter calculating module;
- the mapping relationship establishing module is configured to: configure an element mapping relationship table
- the adjustment information acquisition module is configured to: when the card information on the optical transmission device is adjusted, obtain the adjusted card information and notify the parameter calculation module;
- the parameter calculation module is configured to: recalculate the total length of the transmission line between the connected boards according to the adjusted board information and the element mapping relationship table; and further, according to the total length of the transmission line and the chip of the board
- the type recalculates the pre-emphasis and equalization parameter values and notifies them to the main control board, which is sent to each board.
- the entry of the element mapping relationship table includes: a board position of the board, a board type of the board, a chip type of the board, a transmission line number of the board, a transmission line length of the board, and a back The transmission line number of the board, the length of the transmission line of the backplane, the board position of the board 2, the board type of the board 2, the chip type of the board 2, the transmission line number of the board 2, and the transmission line length of the board 2.
- the element mapping relationship table includes a mapping table 1 and a mapping table 2;
- the entries of the mapping table include: a board type, a board chip type, a transmission line number of the board, and a transmission line length of the board;
- the entry of the mapping table 2 includes: a board position of the board, a transmission line number of the board, a transmission line number of the back board, a transmission line length of the back board, a board position of the board 2, and a transmission line of the board 2 number.
- the invention has the following beneficial effects:
- the main control board can dynamically adjust the chip pre-emphasis and equalization parameters and notify each board in time to ensure that each board can adjust the message signal according to the adjusted pre-emphasis and equalization parameters, thereby improving the message signal.
- Transmission quality BRIEF abstract
- FIG. 1 is a flow chart of a dynamic adjustment method of the present invention
- FIG. 2 is a flow chart of a method for dynamically adjusting pre-emphasis and equalization parameters in the first embodiment
- Embodiment 3 is a schematic structural diagram of an optical transmission device in Embodiment 2;
- the dynamic adjustment device for chip pre-emphasis and equalization parameters proposed by the invention comprises:
- mapping relationship establishing module configured to configure an element mapping relationship table
- the adjustment information acquisition module is configured to obtain the adjusted card information and notify the parameter calculation module when the card information on the optical transmission device is adjusted;
- a parameter calculation module configured to recalculate the total length of the transmission line between the connected boards according to the adjusted board information and the element mapping relationship table; and recalculate the pre-calculation according to the total length of the transmission line and the chip type of the board
- the value of the parameter is added and equalized and sent to the main control board, which is sent to each board.
- the dynamic adjustment method of the device comprises the following steps:
- Step 101 Establish an element mapping relationship table.
- the board position, board type, or board chip type may change dynamically, you must use a method to determine other changes related to this change caused by dynamic changes.
- the pre-emphasis and equalization parameters can be calculated according to this fixed relationship during the calculation, so the present invention uses the mapping relationship table to implement such a one-to-one correspondence.
- an element mapping relationship table including all elements can be directly established, as shown in Table 1 below.
- the entries include: the board position of the board 1 , the board type of the board 1 , the chip type of the board 1 , the transmission line number of the board 1 , the transmission line length of the board 1 , the transmission line number of the back board, and the back board The length of the transmission line, the position of the board of the board 2, the board type of the board 2, the chip type of the board 2, the transmission line number of the board 2, and the transmission line length of the board 2.
- the element mapping relationship table shown in Table 1 can be divided into the following mapping table 1 (as shown in Table 2).
- the mapping table 2 (as shown in Table 3);
- the mapping table 1 entries include: the board position of the board 1, the transmission line number of the board 1, the backplane transmission line number, the backplane transmission line length, and the insertion of the board 2
- the entries in the mapping table 2 include: the board type, the board chip type, the transmission line number of the board, and the transmission line length of the board.
- the mapping table associated with the element is found. Item, the transmission line length of the adjusted board (hereinafter referred to as the board 1), and the board 1
- the transmission line length of the other connected boards hereinafter referred to as the single board 2 and the transmission line length of the corresponding backplane.
- Step 103 Calculate the total length of the current transmission line according to the following formula:
- the total length of the transmission line the length of the transmission line of the board 1 + the length of the transmission line of the board 2 and the length of the transmission line of the back board; and according to the total length of the transmission line and the board 1 / board 2
- the value of the pre-emphasis and equalization parameters of the board 1 and the board 2 are recalculated and sent to the board 1/board 2.
- the specific implementation is as follows (the pre-emphasis and equalization parameter values are determined by the chip type of the board and the total length of the transmission line.
- the pre-emphasis corresponding to each chip type of the chip type is determined by the designer when the total length of the transmission line is in different ranges.
- the value of the equalization parameter is determined according to the current total length of the transmission line and the chip type of the board in the specific implementation:
- Total length of transmission line length of transmission line of single board 1 length of transmission line of backplane + length of transmission line of single board 2;
- /* PI/P2 indicates the pre-emphasis parameters of the board 1/board 2
- Bl/B2 indicates the equalization parameters of the board 1/board 2
- X/Y indicates the range of the total length of the transmission line
- A/B indicates the board 1 / Chip type of the board 2
- the following AXP1 indicates the pre-emphasis parameter value of the board 1 of the chip type A when the total length of the transmission line is in the area X, other similar */
- the single chip 1 chip pre-emphasis parameter AXP1;
- the optical transmission device includes only the single board 1 and the board 2 connected thereto.
- the board type of the board 1 in the slot 1 is TYPE1, and the chip type is A.
- the board type of the slot 2 on the backplane is TYPE2, and the chip type is B).
- Step 201 Establish a mapping table 1 and a mapping table 2 by using a mapping relationship establishing module.
- Table 1 above shows the final mapping relationship established by the main control board according to Table 2 and Table 3 after the optical transmission equipment is running.
- an optical transmission device there are dozens of slots on the backplane for inserting dozens of different types of boards.
- Each board has at least 64 transmission lines, and the length of the same transmission line number of different types of boards is not It must be the same, so only the total length of the final transmission line can be obtained according to Table 1.
- the connection line number of the slot on the backplane and the transmission line number of the backplane are fixed, it is not practical to save the various plug-in schemes of all the slots in the manner of Table 1, which is not only complicated, but also The search efficiency is very low.
- the first embodiment establishes a mapping table 1 (ie, a mapping table of the transmission line number of the slot on the backplane and the transmission line number of the backplane) and the mapping table 2 (ie, Table 3: light).
- the transmission line information configuration file of each chip type supported by the transmission device, and the two mapping tables are stored in the specified directory in the optical transmission device.
- Step 202 When the device is running for the first time, the boards in slots 1 and 2 report their slot numbers, board types, and chip types to the adjustment information acquisition module. According to reservations.
- Step 203 The parameter calculation module reads the mapping table 1 and searches the mapping table 1 according to the board position information reported by the board in the slot 1 (that is, the board 1), and obtains the information about the board transmission line that is connected to the slot 1 (Transmission line number of the board 2 in the slot 2), the transmission line information of the backplane (that is, the transmission line number of the backplane and the corresponding transmission line length), and the transmission line information of the board 1 in the slot 1 (that is, the transmission line of the board 1) number). Assume that the transmission line number of the board 1 in slot 1 is 20, and the transmission line number of board 2 in slot 2 is 20.
- Step 204 The parameter calculation module reads the mapping table 2, and searches the mapping table 2 according to the board type and the chip type of the board 1/2, and obtains the board 1 with the board type being TYPE1, the chip type being A, and the transmission line number being 20.
- the specific method of calculating the pre-emphasis and equalization parameter values is as follows:
- Step 206 Determine whether the card information on the optical transmission device changes. If the change has not occurred, repeat this step; otherwise, perform step 207.
- the adjusted card information is as follows: The board type of the card in the first slot is changed to TYPE3, and the chip type is changed to C. The board type of the board in slot 2 on the backplane becomes TYPE4 and the chip type is D.
- Step 207 When the optical transmission device is running, the boards in slots 1 and 2 report their slot numbers, board types, and chip types to the adjustment information acquisition module, and the information acquisition module finds the type of the board and If the chip type is changed, the related information retained before is updated, and the parameter calculation module recalculates the parameters according to the updated information according to steps 203-205 and delivers the parameters.
- the board inserted on the backplane of the optical transmission device only involves two types of service boards and cross boards.
- the system structure is shown in Figure 3.
- the service board and the cross board are connected as an example.
- the total length of the transmission line is the length of the transmission line of the service board, the length of the transmission line of the backplane, and the length of the transmission line of the cross board. Therefore, all physical boards (backplane, service board, cross board) need to be established in advance when implementing the present invention.
- the configuration file of the transmission line information as shown in FIG. 4, includes two parts of the information header and the information area. The length of the information header is fixed, and the length of the information area increases with the type of the board.
- the information head is further subdivided into the following parts:
- CRC (Cyclic Redundancy Check) check word The check content is all bytes after the CRC check word. The integrity of the file needs to be verified when reading this file. If the CRC check fails. An alarm is required to inform the user that the content of this file is corrupted and needs to be updated.
- the file version number is used to indicate the version information of this file.
- the backplane information area base address indicates the offset of the first address of the backplane information area in this file.
- the number of physical versions of the backplane indicates the number of physical versions of the backplane. There may be multiple versions of the backplane.
- the length of the backplane information area indicates the number of bytes occupied by the information area of the single backplane.
- Service board information area base address Indicates the offset of the first address of the service board information area in the file;
- Number of service board types Indicates the type of service board type Length of the service board information area: Indicates the number of bytes occupied by the information area of the single service board. The length of the service line is determined by the number of transmission lines of the service board.
- the base address of the cross-board information area indicates the first address of the information area of the cross-board.
- the information area of the above configuration file can be further divided into three parts: a backplane information area, a service board information area, and a cross-board information area.
- the information area of the backplane can be further divided into: backboard version information, backplane slot number, transmission line number of the backplane, and transmission line length of the backplane.
- Backplane version information Indicates the physical version number of the backplane in the system.
- the slot number of the backplane indicates the slot number of the service board in the system. A system can usually insert many boards. For convenience, it is in a certain order.
- the length of the transmission line of the backplane indicates the length of the PCB trace on the backplane.
- the information area of the service board can be further divided into: the physical board name of the service board, the transmission line number of the service board, the chip type of the service board, and the transmission line length of the service board.
- Name of the physical board of the service board Names and numbers are used to distinguish different physical boards.
- the transmission line number of the service board On the hardware, the service board is connected to the backplane. Therefore, the service board is The number of the number and the backplane are - corresponding; the chip type of the service board: the service chip type of the service board, the driving capability of different chips, and the pre-emphasis and equalization parameters are also different.
- the cross-board information area can be further divided into: physical board name of the cross-board, cross-board slot number, transmission line number of the cross-board, chip type of the cross-board, and transmission line length of the cross-board.
- Name of the physical board on the cross-board There may be multiple types of cross-boards on the backplane. For convenience, name and number are unified.
- Cross-board slot number There may be multiple cross-boards on the backplane.
- the transmission line number of the cross-board a crossover There are many transmission lines on the board, which are connected to different service boards. For convenience, they are numbered uniformly.
- the chip type of the cross board indicates the cross chip type of the cross board. In order to distinguish different cross chips, the number is unified; the cross board transmission line Length: Indicates the length of the PCB traces in the cross board.
- each board reports its slot number, board type, and chip type.
- the mapping relationship establishing module establishes an element mapping relationship table according to the information and the configuration file, including The slot number of the backplane, the transmission line number of the backplane, the length of the transmission line of the backplane, the transmission line number of the service board, the chip type of the service board, the transmission line length of the service board, the slot number of the cross board, and the transmission line number of the cross board.
- the chip type of the cross board and the transmission line length of the cross board is the transmission line length of the cross board.
- the parameter calculation module calculates the total length of the transmission line between the currently connected service board and the cross board according to the table, and then searches for the pre-emphasis and the equalization parameter according to the chip type of the current service board, the chip type of the cross board, and the total length of the transmission line.
- the lookup table (as shown in Table 5, which is obtained by prior measurement or software analysis, the same as the prior art), obtains the pre-emphasis and equalization parameters of the cross-board, the pre-emphasis and equalization parameters of the service board, and then Send the parameters to the cross-board and service board through the main control board.
- the parameter calculation module recalculates the pre-emphasis and equalization parameters of the adjusted board according to the above method and delivers the parameters through the main control board.
- the main control board can dynamically adjust the chip pre-emphasis and equalization parameters and notify each board in time to ensure that each board can adjust the message signal according to the adjusted pre-emphasis and equalization parameters, thereby improving the message signal. Transmission quality.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BRPI1010205A BRPI1010205A8 (pt) | 2009-07-02 | 2010-06-21 | método para ajustar dinamicamente os parâmetros de pré-enfâse e equalização de um chip em um dispositivo de transmissão ótica e dispositivo para ajustar dinamicamente os parâmetros de pré-enfâse e equalização de um chip |
RU2011152510/07A RU2506700C2 (ru) | 2009-07-02 | 2010-06-21 | Способ и устройство для динамической корректировки параметров предыскажения и выравнивания микросхем |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2009101085006A CN101651491B (zh) | 2009-07-02 | 2009-07-02 | 芯片预加重和均衡参数的动态调整方法及装置 |
CN200910108500.6 | 2009-07-02 |
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WO2011000273A1 true WO2011000273A1 (zh) | 2011-01-06 |
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PCT/CN2010/074158 WO2011000273A1 (zh) | 2009-07-02 | 2010-06-21 | 芯片预加重和均衡参数的动态调整方法及装置 |
Country Status (5)
Country | Link |
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KR (1) | KR20120030531A (zh) |
CN (1) | CN101651491B (zh) |
BR (1) | BRPI1010205A8 (zh) |
RU (1) | RU2506700C2 (zh) |
WO (1) | WO2011000273A1 (zh) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
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CN101651491B (zh) * | 2009-07-02 | 2012-07-04 | 中兴通讯股份有限公司 | 芯片预加重和均衡参数的动态调整方法及装置 |
CN102662896B (zh) * | 2012-03-30 | 2015-06-03 | 中兴通讯股份有限公司 | 自动调整预加重参数和/或均衡参数的方法及装置 |
CN106797357B (zh) * | 2015-06-05 | 2019-10-01 | 华为技术有限公司 | 高速串行信号的处理方法和装置 |
CN109165046A (zh) * | 2018-08-24 | 2019-01-08 | 郑州云海信息技术有限公司 | 一种板载sata参数优化方法及装置 |
CN109462436B (zh) * | 2018-12-27 | 2021-02-09 | 新华三技术有限公司 | 测试板、信号传输方法及测试系统 |
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CN2932839Y (zh) * | 2006-02-28 | 2007-08-08 | 北京索安视讯科技有限公司 | 基于双绞线传输的以太网长距离收发器 |
CN101067806A (zh) * | 2006-05-04 | 2007-11-07 | 国际商业机器公司 | 用于串扰补偿的方法和电路 |
CN101651491A (zh) * | 2009-07-02 | 2010-02-17 | 中兴通讯股份有限公司 | 芯片预加重和均衡参数的动态调整方法及装置 |
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US5627857A (en) * | 1995-09-15 | 1997-05-06 | Qualcomm Incorporated | Linearized digital automatic gain control |
US7915954B2 (en) * | 2004-01-16 | 2011-03-29 | Qualcomm, Incorporated | Amplifier predistortion and autocalibration method and apparatus |
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2009
- 2009-07-02 CN CN2009101085006A patent/CN101651491B/zh not_active Expired - Fee Related
-
2010
- 2010-06-21 WO PCT/CN2010/074158 patent/WO2011000273A1/zh active Application Filing
- 2010-06-21 KR KR1020127000917A patent/KR20120030531A/ko not_active Application Discontinuation
- 2010-06-21 RU RU2011152510/07A patent/RU2506700C2/ru not_active IP Right Cessation
- 2010-06-21 BR BRPI1010205A patent/BRPI1010205A8/pt not_active Application Discontinuation
Patent Citations (3)
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CN2932839Y (zh) * | 2006-02-28 | 2007-08-08 | 北京索安视讯科技有限公司 | 基于双绞线传输的以太网长距离收发器 |
CN101067806A (zh) * | 2006-05-04 | 2007-11-07 | 国际商业机器公司 | 用于串扰补偿的方法和电路 |
CN101651491A (zh) * | 2009-07-02 | 2010-02-17 | 中兴通讯股份有限公司 | 芯片预加重和均衡参数的动态调整方法及装置 |
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Title |
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LAI, WANJIU: "Pre-emphasis and Equalization Technology Applied in Designing High-speed Backplane", ELECTRONIC ENGINEERING & PRODUCT WORLD, vol. 11, November 2008 (2008-11-01), pages 100 - 101 * |
Also Published As
Publication number | Publication date |
---|---|
RU2011152510A (ru) | 2013-08-20 |
BRPI1010205A2 (pt) | 2016-03-29 |
BRPI1010205A8 (pt) | 2018-12-18 |
CN101651491A (zh) | 2010-02-17 |
RU2506700C2 (ru) | 2014-02-10 |
CN101651491B (zh) | 2012-07-04 |
KR20120030531A (ko) | 2012-03-28 |
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