WO2012126411A2 - 数字用户线的信号处理方法、装置及数字用户线系统 - Google Patents

数字用户线的信号处理方法、装置及数字用户线系统 Download PDF

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Publication number
WO2012126411A2
WO2012126411A2 PCT/CN2012/074924 CN2012074924W WO2012126411A2 WO 2012126411 A2 WO2012126411 A2 WO 2012126411A2 CN 2012074924 W CN2012074924 W CN 2012074924W WO 2012126411 A2 WO2012126411 A2 WO 2012126411A2
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WIPO (PCT)
Prior art keywords
transmitted
frame
data
remaining symbols
symbol
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PCT/CN2012/074924
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English (en)
French (fr)
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WO2012126411A3 (zh
Inventor
石操
何孝月
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华为技术有限公司
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Priority to PCT/CN2012/074924 priority Critical patent/WO2012126411A2/zh
Priority to CN2012800003916A priority patent/CN102823193A/zh
Priority to EP12759921.5A priority patent/EP2658169B1/en
Publication of WO2012126411A2 publication Critical patent/WO2012126411A2/zh
Publication of WO2012126411A3 publication Critical patent/WO2012126411A3/zh
Priority to US14/018,062 priority patent/US20140010270A1/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/06—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors
    • H04M11/062—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors using different frequency bands for speech and other data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/06—Synchronising arrangements
    • H04J3/07—Synchronising arrangements using pulse stuffing for systems with different or fluctuating information rates or bit rates
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/10—Arrangements for reducing cross-talk between channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure

Definitions

  • the present invention relates to a communication technology, and in particular, to a digital subscriber line (DSL) signal processing method and apparatus, and a digital subscriber line system.
  • DSL digital subscriber line
  • Digital subscriber line technology is a high-speed transmission technology for data transmission over a telephone twisted pair, Unshielded Twist Pair (UTP).
  • the existing DSL technologies include Asymmetric Digital Subscriber Line (ADSL), Very-high-bit-rate Digital Subscriber Line (VDSL), and Integrated Services Digital (Integrated Services Digital Network). Network, ISDN) ISDN Digital Subscriber Line (IDSL) and Single-pair High-bit-rate Digital Subscriber Line (SHDSL).
  • DSL using passband transmission utilizes frequency division multiplexing technology to enable DSL service and Plain Old Telephone Service (POTS).
  • POTS Plain Old Telephone Service
  • the DSL service occupies a high frequency band
  • the POTS occupies a baseband portion below 4 kHz
  • the POTS signal and the DSL service signal are separated or merged through a split/integrator (Splitter).
  • split/integrator split/integrator
  • the typical application distance of the stranded wire is less than 100m, the number of users is less than 32, the bandwidth of the usable frequency band reaches 100MHz, and the single-pair line can provide a speed exceeding 500Mbps.
  • the short-distance DSL technology line can reach a very high rate, even up to 1 Gbps, and the average rate of users is much lower than this value.
  • the idle information will be filled in the transmission frame.
  • the signal on the line remains transmitted.
  • most of the symbols in the frame do not carry user data, and the idle information is carried, but the symbol carrying the idle information also consumes the digital front end (DFE) and the analog front end ( Analog front end, AFE )
  • DFE digital front end
  • AFE Analog front end
  • the receiver consumes power because it needs to process these symbols.
  • Embodiments of the present invention provide a signal processing method and apparatus for a digital subscriber line and a digital subscriber line system for implementing energy saving of a digital subscriber line system.
  • a first aspect of the present invention provides a signal processing method for a digital subscriber line, including: using a symbol of a frame to be transmitted to carry data to be transmitted; and acquiring a frame to be transmitted that carries the to-be-sent data, The number of remaining symbols that do not carry the data to be transmitted;
  • a signal processing apparatus for a digital subscriber line including: a bearer module, configured to carry data to be transmitted by using a symbol of a frame to be transmitted;
  • a remaining symbol obtaining module configured to acquire, in a frame to be sent that carries the to-be-sent data, the number of remaining symbols that do not carry the data to be sent;
  • an adding and sending module configured to add quantity information of the remaining symbols to the to-be-transmitted frame that carries the to-be-sent data, and send the quantity information that carries the to-be-sent data and adds the remaining symbols Frame.
  • Yet another aspect of an embodiment of the present invention is to provide a digital subscriber line system including the above signal processing apparatus.
  • the technical effects of the signal processing method and device and the digital subscriber line system provided by the embodiment of the present invention are as follows: by adding the quantity information of the remaining symbols that do not carry the data to be transmitted to the frame to be transmitted, so that the receiver can learn that the receiver is not carried.
  • the information of the remaining symbols of the data to be transmitted, without processing the remaining symbols saves the signal processing power in the DSL system and reduces the power consumption, so that the DSL system achieves energy saving.
  • FIG. 1A is a flowchart of a signal processing method for a digital subscriber line according to an embodiment of the present invention
  • FIG. 1B is a schematic diagram of symbol bearer in a frame to be transmitted in a signal processing method for a digital subscriber line according to an embodiment of the present invention
  • FIG. 1C is a schematic structural diagram of a frame to be sent in a signal processing method for a digital subscriber line according to an embodiment of the present disclosure
  • FIG. 2 is a schematic diagram of synchronization of downlink time slots of different ports in a signal processing method for a digital subscriber line according to Embodiment 4 of the present invention
  • FIG. 3 is a schematic diagram of downlink time slot synchronization implemented by time synchronization of different ports in a signal processing method for a digital subscriber line according to Embodiment 4 of the present invention
  • FIG. 4 is a schematic diagram of crosstalk jitter to be solved by a signal processing method for a digital subscriber line according to Embodiment 4 of the present invention
  • FIG. 5 is a schematic diagram of a signal processing method for a digital subscriber line according to Embodiment 4 of the present invention for solving crosstalk jitter;
  • FIG. 6A is a schematic structural diagram of a signal processing apparatus for a digital subscriber line according to an embodiment of the present invention
  • FIG. 6B is a schematic structural diagram of a synchronization signal generation module in a signal processing apparatus for a digital subscriber line according to an embodiment of the present invention
  • FIG. 7 is a schematic structural diagram of a digital subscriber line system according to an embodiment of the present invention.
  • FIG. 1A is a flowchart of a signal processing method for a digital subscriber line according to an embodiment of the present invention. As shown in FIG. 1A, the signal processing method of the digital subscriber line includes:
  • Step 11 The data to be sent is carried by the symbol of the frame to be sent.
  • Step 12 Acquire, in the frame to be sent that carries the to-be-sent data, the number of remaining symbols that do not carry the data to be sent.
  • the padded bit information is the number of symbols of the idle information (ie, the remaining symbols), as shown in FIG. 1B, where the gray box is the bearer service information, that is, the data to be sent.
  • the symbol, the white box is the symbol that carries the idle information.
  • Step 13 Add the quantity information of the remaining symbols to the to-be-transmitted frame that carries the to-be-sent data, and send a frame that carries the to-be-sent data and adds the quantity information of the remaining symbols.
  • the frame to be transmitted is as shown in FIG. 1C, and includes an Operation and Management Symbol (OAM Symbol) and a data symbol.
  • Operation and management symbols are used to carry data with small amount of data and high real-time requirements, such as: Receiver error indication is too high.
  • the quantity information of the remaining symbols may be carried in the operation and management symbols, or may be carried in the management message, and the management message carrying the quantity information of the remaining symbols is mixed with the data information and carried in the data symbol.
  • the management message can be used for the management and control information of the transceiver to transmit a large amount of data, for example, the Signal to Noise Rate (SNR) of the Customer Premises Equipment (CPE) side.
  • the management message and the user data may be mixed by the following example: the content carried by the data symbol includes a user data frame and a management message frame, for example, inserting a management message frame into the K user data frames, and then The user data frame and the management message frame are mixed and carried on the data symbols.
  • the above steps 11 to 13 can be performed by a transceiver in a Time Division Duplex (TDD) DSL system.
  • TDD Time Division Duplex
  • the signal transmission power of the remaining symbols is set to zero.
  • the method further includes: generating a downlink time slot synchronization signal; for example, the transceiver may use a homologous clock, a symbol period parameter And uplink/downtime time ratio information, generating the downlink time slot synchronization signal.
  • the sending the frame carrying the data to be sent and adding the quantity information of the remaining symbol comprises: transmitting, by the trigger of the downlink time slot synchronization signal, the data to be sent and adding the The transmission frame of the number information of the remaining symbols.
  • all the pre-specified symbol sets in the sending frame The signal transmission power of the symbol is set to non-zero, and the transmission frame is a frame to be transmitted that carries the data to be transmitted and adds the remaining symbols.
  • the remaining symbols are replaced with idle symbols known to the recipient.
  • the idle symbol may be the same as the last symbol carrying the transmission data, or a specific symbol that the transmitting and receiving parties pre-agreed the modulation mode and the bit-bearing content.
  • some of the remaining symbols are replaced with idle symbols known by the receiver, and the signal transmission power of the other part of the remaining symbols is set to zero.
  • the signal processing method adds the quantity information of the remaining symbols that do not carry the data to be sent to the frame to be sent, so that the receiver can learn the quantity information of the remaining symbols that do not carry the data to be sent, and thus The remaining symbols are processed, which saves the signal processing power in the TDD DSL system and reduces the power consumption, which makes the TDD DSL system energy-saving.
  • the signal processing method will be further described in detail below through Embodiment 1 to Embodiment 4.
  • the signal processing method of the digital subscriber line provided by the embodiment includes: the transceiver carries the data to be transmitted on the symbol of the frame to be transmitted; and the transceiver according to the size of the data to be transmitted and the data capacity of the frame to be transmitted.
  • the padded bit information is all the number of symbols of the idle information, that is, the number of remaining symbols, such as K symbols, or K remaining symbols; the transceiver will carry all the idle information
  • the signal transmission power of the K symbols is set to 0. Since the information carried by the symbol carrying the idle information is empty, setting the signal transmission power to 0 does not affect the communication quality of the data, and reduces the power consumption of the transmitted signal; If not 0, the transceiver adds the quantity information K in the frame operation and management symbol or management message part to be sent, indicating that the number of symbols whose signal transmission power is 0 in the frame is K, so that the receiver receives The K symbols are not processed after the instruction, thereby further reducing the power consumption of the signal processing.
  • the signal processing method of the digital subscriber line includes: a transceiver carries the data to be transmitted on the symbol of the frame to be transmitted; the transceiver estimates the padded bits in the symbol of the frame to be transmitted according to the size of the data to be transmitted and the data capacity of the frame to be transmitted.
  • the information is all the number of symbols of idle information, such as K symbols;
  • the transceiver replaces the K bits of the padded bit information with all the idle information by using an idle symbol, which is a specific symbol pre-agreed by the transmitting and receiving parties, and can reduce the number of symbols generated by the transceiver to carry the idle information.
  • the DFE processes the power consumption.
  • the receiving side of the frame sent by the transceiver can directly discard the idle symbol without processing, thereby further reducing power consumption. If K is not 0, the transceiver is in the frame to be transmitted. Adding quantity information K in the operation and management symbol or management message part, indicating that the number of the idle symbols in the current frame is K, so that the receiver does not process the K idle symbols after receiving the indication, thereby further Reduced power consumption in signal processing.
  • the idle symbol may be the same as the last non-idle symbol in the frame in which it is located, or may be a specific symbol in which the modulation mode and the bit-bearing content have been pre-agreed by both parties.
  • All subcarriers carry bit 2
  • the bearer bit is generated by a pseudorandom code generator
  • the initial state of the pseudorandom code generator is a predetermined value.
  • Embodiment 3 This embodiment combines the first embodiment and the second embodiment, and is different from the first embodiment and the second embodiment in that the transceiver fills all the bit information into the K symbols of the idle information.
  • the signal transmission power of a part of the symbols is set to 0, and the other part of the symbols is replaced by the idle symbols in the second embodiment.
  • the transceiver adds the quantity information K in the operation and management symbol or management message part of the frame to be transmitted, indicating that the number of symbols in the frame in which the padding bit information is all idle information is K, so that After receiving the indication, the receiver does not process the K symbols, thereby further reducing the power consumption of the signal processing.
  • Embodiment 4 In this embodiment, on the basis of the foregoing Embodiment 1 and Embodiment 2, a synchronization processing operation is further added to solve the near-end crosstalk problem that may exist in the existing DSL system.
  • the traditional TDD DSL system there is usually overlap between the uplink and downlink media, if the uplink and downlink.
  • the time slot is not synchronized, when one port is receiving the uplink signal, the other port may be transmitting the downlink signal.
  • the downlink signal will generate near-end crosstalk to other ports, and interfere with the uplink reception, especially in the uplink and downlink spectrum.
  • the overlapping part will generate a large interference, which will seriously affect the demodulation of the signal.
  • this embodiment further increases the synchronization processing operation, so that the symbols of the downlink DSL ports are synchronized with the time slots to solve the near end of the TDD DSL system.
  • the problem of crosstalk Specifically, when the transceiver sends a frame, uplink and downlink time slot synchronization between the ports is implemented. As shown in Figure 2, downlink time slot synchronization is implemented between ports 1, port 2, ... port n ports, which can avoid crosstalk of downlink frames between port 1, port 2, ... port n ports, that is, solve the near end of the DSL system. Crosstalk problem. The same goes up.
  • the downlink time slot synchronization signal may be generated by using the homologous clock, the symbol period parameter, and the uplink and downlink time ratio information.
  • Each DSL port refers to this lower slot synchronization signal to perform uplink and downlink time slot switching.
  • the DSL ports can be synchronized with the network time source, that is, a reference time is used as a reference, and the offset between the downlink time slot and the reference time is calculated, and the start time and the end time of the downlink time slot are obtained. , thereby achieving synchronization of downlink time slots.
  • the far-end crosstalk jitter caused by the user 1 to the user 2 causes the affected user 2 to measure the crosstalk noise to be low, thereby causing insufficient noise protection capability on the symbol with far-end crosstalk. Therefore, optionally, after the frames of the DSL ports of the DSL system are synchronized, the signal transmission power of each DSL port on the pre-specified symbol set L of all frames is not 0, that is, the pre-specified symbol set L The signal transmission power is set to non-zero.
  • each receiver performs signal-to-noise ratio (SNR) measurement on the pre-specified symbol set L to ensure that crosstalk noise is not erroneously estimated to solve the far-end crosstalk jitter problem.
  • SNR signal-to-noise ratio
  • FIG. 6 is a schematic structural diagram of a signal processing apparatus for a digital subscriber line according to an embodiment of the present invention.
  • the signal processing device provided by the embodiment of the present invention may be a client-side xDSL transceiver in a DSL system, or a central-end xDSL transceiver in a DSL system, as shown in FIG. 6A, including: a bearer module 61, a remaining symbol acquisition module 62, and Add and send module 63.
  • the bearer module 61 is configured to carry the data to be sent by using the symbol of the frame to be sent.
  • the remaining symbol acquisition module 62 is configured to obtain the number of remaining symbols in the frame to be transmitted that carries the data to be transmitted, and does not carry the data to be transmitted.
  • the adding and sending module 63 is configured to add the quantity information of the remaining symbols to the to-be-transmitted frame that carries the data to be sent, and send a frame that carries the data to be sent and adds the quantity information of the remaining symbols, specifically See the description of FIG. 1A to FIG. 1C for details.
  • the signal processing apparatus provided by the embodiment of the present invention further includes: a first power setting module, configured to set a signal sending power of the remaining symbols to 0 when the adding and transmitting module sends the remaining symbols.
  • the signal processing apparatus provided by the embodiment of the present invention further includes:
  • the synchronization signal generating module can generate a downlink time slot synchronization signal by using at least a homologous clock, a symbol period parameter, and uplink and downlink time ratio information.
  • Each port such as port 1, port 2, and port 3, refers to this lower slot synchronization signal to perform uplink and downlink time slot switching.
  • the homologous clock is applied to each port to generate a sampling clock.
  • the first power setting module is further configured to: when the sending and transmitting module sends the sending frame under the trigger of the downlink time slot synchronization signal, send the signal of all symbols in the pre-specified symbol set in the sending frame.
  • the transmission power is set to non-zero
  • the transmission frame is a frame to be transmitted that carries the data to be transmitted and adds the quantity information of the remaining symbols.
  • the signal processing apparatus provided by the embodiment of the present invention further includes: a symbol replacement module, configured to replace the remaining symbol with an idle symbol known by the receiver.
  • the idle symbol is the same as the last symbol carrying the transmission data, or is a specific symbol that the transmitting and receiving parties pre-agreed the modulation mode and the content of the bit 7 .
  • the symbol replacement module may be specifically configured to replace one of the remaining symbols with an idle symbol known by the receiver;
  • the signal processing apparatus further includes: a second power setting module, configured to set a signal transmission power of the other part of the remaining symbols to zero.
  • the signal processing device of the digital subscriber line adds the quantity information of the remaining symbols that do not carry the data to be sent in the frame to be sent by the adding and transmitting module, so that the receiver can learn that the data to be transmitted is not carried.
  • the information of the remaining symbols, so that the remaining symbols are not processed saves the signal processing power in the TDD DSL system, reduces the power consumption, and enables the TDD DSL system to achieve energy saving.
  • the digital subscriber line system provided by the embodiment of the present invention includes the signal processing apparatus of any of the digital subscriber lines provided by the foregoing apparatus embodiments.
  • the digital subscriber line system includes a subscriber end xDSL transceiver 720 and a central office xDSL transceiver 750.
  • the central office xDSL transceiver 750 can be placed in a DSL Access Multiplexer (DSLAM).
  • DSLAM can include multiple central office xDSL transceivers 750 for providing multiple DSL access.
  • the passband transmission xDSL is modulated and demodulated using Discrete Multi-Tone Modulation (DMT) technology.
  • DMT Discrete Multi-Tone Modulation
  • the client-side xDSL transceiver 720 includes a client-side transceiver unit 721 and a split/conformer 722.
  • the central office xDSL transceiver 750 includes a central office transceiver unit 752 and a split/integrator 751.
  • the client transceiver unit 721 and the office transceiver unit 752 can be any of the digital subscriber line signal processing devices provided by the foregoing device embodiments.
  • the client transceiver unit 721 receives the DSL service signal from the computer 710 and performs amplification processing on the received DSL service signal. Then, the client transceiver unit 721 will be at The processed DSL service signal is sent to the split/integrator 722.
  • the split/conformer 722 integrates the DSL service signal from the client transceiver unit 721 and the POTS signal of the telephone terminal 730, such as multiplexing the DSL service signal and the POTS signal, and transmitting the integrated signal through the UTP 740. .
  • the split/integrator 751 in the central office xDSL transceiver 750 receives the integrated signal from the client xDSL transceiver 720.
  • the split/embedder 751 separates the received signals, sends the POTS signals to the Public Switched Telephone Network (PSTN) 760, and transmits the DSL service signals to the central office of the central office xDSL transceiver 750.
  • the central office transceiver unit 752 further amplifies the received DSL service signal and then transmits it to a Network Management System (NMS) 770.
  • NMS Network Management System
  • the signals are processed and transmitted in the reverse order of the above.
  • the digital subscriber line system provided by the embodiment of the present invention adopts any one of the signal processing devices provided by the foregoing device embodiments.
  • the signal processing method the number of remaining symbols that do not carry the data to be transmitted is added to the frame to be transmitted.
  • the information enables the receiver to learn the information of the remaining symbols that do not carry the data to be transmitted, so that the remaining symbols are not processed, the signal processing power in the TDD DSL system is saved, and the power consumption is reduced, so that the TDD DSL system achieves energy saving.

Description

数字用户线的信号处理方法、 装置及数字用户线系统
技术领域
本发明涉及一种通信技术， 尤其涉及一种数字用户线（ Digital Subscriber Line, DSL ) 的信号处理方法、 装置及数字用户线系统。
背景技术
数字用户线技术是一种通过电话双绞线，即无屏蔽双绞线 （ Unshielded Twist Pair, UTP )进行数据传输的高速传输技术。 目前已经有的 DSL技术包 括非对称数字用户线（Asymmetrical Digital Subscriber Line, ADSL ), 甚高速 数字用户线（Very-high-bit-rate Digital Subscriber Line, VDSL )、 基于综合业 务数字网 （ Integrated Services Digital Network, ISDN ) 的用户数字线（ ISDN Digital Subscriber Line , IDSL ) 和单线对高速数字用户线 （ Single-pair High-bit-rate Digital Subscriber Line, SHDSL )等。
在各种数字用户线技术（xDSL ) 中， 除了 IDSL和 SHDSL等基带传输 的 DSL外， 采用通带传输的 DSL利用频分复用技术使得 DSL业务与传统电 话业务（Plain Old Telephone Service, POTS )共存于同一对双绞线上。 同一 对双绞线中， DSL业务占据高频段， POTS占用 4KHz以下基带部分， POTS 信号与 DSL业务信号通过分离 /整合器（Splitter )进行分离或合并。 随着光纤接入 ( Fiber-to-the-x, FTTx )建设的深入， 双绞线应用场景越 来短， 在光纤接入末端（Fibre-To-The-Distribution point, FTTdp )场景下， 双 绞线典型应用距离小于 100m, 用户数量小于 32个， 可以使用的频带的带宽 达到 100MHz, 单对线路可提供超过 500Mbps的速率。
由于短距离 DSL技术线路可达速率非常高， 甚至可达到 lGbps, 而用户 的平均速率远远低于这个值， 在传统 DSL技术中， 用户速率较低时， 将在发 送帧中填充空闲信息， 在线路上信号保持发送， 此时导致帧中大部分的符号 上没有承载用户数据， 承载的是空闲信息， 但是承载空闲信息的符号， 也消 耗了数字前端（ Digital front end, DFE )、 模拟前端（ Analog front end, AFE ) 及线驱动（line Driver, LD )的功耗， 接收方由于需要处理这些符号， 也消耗 了功率。
发明内容 本发明实施例提供一种数字用户线的信号处理方法、 装置及数字用户线 系统， 用于实现数字用户线系统的节能。 本发明实施例的第一个方面是提供一种数字用户线的信号处理方法， 包 括： 采用待发送的帧的符号承载待发送数据； 获取承载了所述待发送数据的待发送的帧中， 未承载所述待发送数据的 剩余符号的数量；
在承载了所述待发送数据的待发送的帧中， 添加所述剩余符号的数量信 息，并发送承载了所述待发送数据并且添加了所述剩余符号的数量信息的帧。 本发明实施例的另一个方面是提供一种数字用户线的信号处理装置， 包 括： 承载模块， 用于采用待发送的帧的符号承载待发送数据；
剩余符号获取模块， 用于获取承载了所述待发送数据的待发送的帧中， 未承载所述待发送数据的剩余符号的数量；
添加及发送模块， 用于在承载了所述待发送数据的待发送的帧中， 添加 所述剩余符号的数量信息， 并发送承载了所述待发送数据并且添加了所述剩 余符号的数量信息的帧。
本发明实施例的又一个方面是提供一种数字用户线系统， 包括上述信号 处理装置。
本发明实施例提供的信号处理方法、 装置及数字用户线系统的技术效果 是： 通过在待发送的帧中添加未承载该待发送数据的剩余符号的数量信息， 使得接收方能够获知未承载该待发送数据的剩余符号的信息， 从而不对剩余 符号进行处理， 节约了 DSL 系统中信号处理功率， 降低了功耗， 使得 DSL 系统实现了节能。 附图说明
图 1A为本发明实施例提供的数字用户线的信号处理方法的流程图； 图 1B 为本发明实施例提供的数字用户线的信号处理方法中待发送的帧 中的符号承载示意图；
图 1C为本发明实施例提供的数字用户线的信号处理方法中待发送的帧 的结构示意图；
图 2为本发明实施例四提供的数字用户线的信号处理方法中不同端口的 下行时隙同步示意图；
图 3为本发明实施例四提供的数字用户线的信号处理方法中不同端口通 过时间同步实现的下行时隙同步示意图；
图 4为本发明实施例四提供的数字用户线的信号处理方法所要解决的串 扰抖动的示意图；
图 5为本发明实施例四提供的数字用户线的信号处理方法解决串扰抖动 的示意图；
图 6A为本发明实施例提供的数字用户线的信号处理装置的结构示意图； 图 6B 为本发明实施例提供的数字用户线的信号处理装置中同步信号产 生模块的结构示意图；
图 7为本发明实施例提供的数字用户线系统的结构示意图。
具体实施方式
图 1A为本发明实施例提供的数字用户线的信号处理方法的流程图。 如 图 1A所示， 该数字用户线的信号处理方法包括：
步骤 11、 采用待发送的帧的符号承载待发送数据。
步骤 12、 获取承载了该待发送数据的待发送的帧中， 未承载该待发送数 据的剩余符号的数量。 比如， 可以根据待发送数据的大小以及待发送的帧的 数据容量， 估算此次待发送的帧的符号中， 填充的比特信息全为空闲信息的 符号数量（即剩余符号）的数量， 如图 1B所示， 其中灰色框为承载业务信息 即待发送数据的符号， 白框为承载空闲信息的符号。
步骤 13、 在承载了该待发送数据的待发送的帧中， 添加该剩余符号的数 量信息 ,并发送承载了该待发送数据并且添加了该剩余符号的数量信息的帧。 其中， 待发送的帧如图 1C 所示， 包括操作与管理符号 （ Operation And Management Symbol, OAM Symbol )及数据符号。 操作与管理符号用于承载 数据量小， 且实时性要求高的数据， 比如： 接收方误码过高指示信息。 剩余 符号的数量信息可以承载在操作与管理符号中， 也可以承载在管理消息中， 并将承载有剩余符号的数量信息的管理消息与数据信息混合后承载在数据符 号中。 其中， 管理消息可以用于收发器传递数据量较大的管理与控制信息， 比如： 用户端设备 ( Customer Premises Equipment, CPE )侧的信噪比（ Signal to Noise Rate, SNR )等。 在一种实施例中， 管理消息与用户数据可以通过以下例子进行混合： 数 据符号承载的内容包含用户数据帧与管理消息帧， 比如， 在 K个用户数据帧 中插入一个管理消息帧， 然后将用户数据帧和管理消息帧混合承载在数据符 号上。
上述步骤 11〜步骤 13可由时分双工 （Time Division Duplex, TDD ) DSL 系统中的收发器执行。 可选地， 发送该剩余符号时， 将该剩余符号的信号发送功率置为 0。 可选地， 在承载了该待发送数据的待发送的帧中， 添加该剩余符号的数 量信息之后， 还包括： 产生下行时隙同步信号； 比如， 收发器可以利用同源时钟、 符号周期参 数、 上下行时间比例信息， 产生所述下行时隙同步信号。 相应的， 上述步骤 13中， 发送承载了该待发送数据并且添加了该剩余符 号的数量信息的帧包括： 在该下行时隙同步信号的触发下， 发送承载了该待 发送数据且添加了该剩余符号的数量信息的发送帧。 可选地， 在发送该发送帧时， 将该发送帧中预先指定的符号集合中所有 符号的信号发送功率置为非 0, 该发送帧为承载了该待发送数据且添加了该 剩余符号的数量的待发送的帧。
可选地， 将该剩余符号替换为接收方已知的空闲符号。 可选地， 该空闲符号可以与承载该发送数据的最后一个符号相同， 或者 为收发双方预先约定调制方式及比特承载内容的特定符号。 可替代地， 可选地， 将该剩余符号中的其中一部分符号替换为接收方已 知的空闲符号， 将该剩余符号中的另一部分符号的信号发送功率置为 0。 本发明实施例中， 信号处理方法通过在待发送的帧中添加未承载该待发 送数据的剩余符号的数量信息 , 使得接收方能够获知未承载该待发送数据的 剩余符号的数量信息，从而不对剩余符号进行处理，节约了 TDD DSL系统中 信号处理功率， 降低了功耗， 使得 TDD DSL系统实现了节能。 下面通过实施例一至实施例四对信号处理方法做进一步详细说明。 实施例一 本实施例提供的数字用户线的信号处理方法包括： 收发器将待发送数据承载在待发送的帧的符号上； 收发器根据待发送数据的大小以及待发送的帧的数据容量， 估算此次待 发送的帧的符号中， 填充的比特信息全为空闲信息的符号数量即剩余符号的 数量， 如 K个符号， 也可说是 K个剩余符号； 收发器将承载空闲信息的所有 K个符号的信号发送功率置为 0, 由于承 载空闲信息的符号承载的信息为空， 因此将其信号发送功率置为 0不影响数 据的通信质量， 且降低了发送信号的功耗； 若 K不为 0, 则收发器在待发送的帧操作与管理符号或管理消息部分中 添加数量信息 K,指示接收方在本帧中信号发送功率为 0的符号的数量为 K, 以使得接收方接收到该指示后不对这 K个符号进行处理， 从而进一步降低了 信号处理的功耗。 实施例二 本实施例提供的数字用户线的信号处理方法包括： 某一收发器将待发送数据承载在待发送的帧的符号上； 该收发器根据待发送数据的大小以及待发送的帧的数据容量， 估算此次 待发送的帧的符号中， 填充的比特信息全为空闲信息的符号数量， 如 K个符 号；
该收发器将填充的比特信息全为空闲信息的 K个符号都使用空闲符号代 替， 该空闲符号为收发双方预先约定的一种特定符号， 可以减少该收发器生 成 K个承载空闲信息的符号的 DFE处理功耗，在接收该收发器发送的帧的接 收侧， 可以直接丟弃该空闲符号， 不进行处理， 从而进一步降低了功耗； 若 K不为 0, 则收发器在待发送的帧的操作与管理符号或管理消息部分 中添加数量信息 K, 指示接收方在本帧中该空闲符号的数量为 K, 以使得接 收方接收到该指示后不对这 K个空闲符号进行处理， 从而进一步降低了信号 处理的功耗。 其中， 空闲符号可以与所在帧中的最后一个非空闲符号相同， 也可以是 调制方式与比特 (bit)承载内容已被收发双方预先约定的特定符号。 如： 所有 子载波承载 bit 2,承载的 bit由伪随机码产生器产生，伪随机码产生器的初始 状态为预定值。
实施例三 本实施例将上述实施例一和实施例二进行结合， 与上述实施例一、 实施 例二的不同之处在于， 收发器将填充的比特信息全为空闲信息的 K个符号中 的一部分符号的信号发送功率置为 0, 另一部分符号用实施例二中的空闲符 号代替。 同样地， 收发器在待发送的帧的操作与管理符号或管理消息部分中 添加数量信息 K, 指示接收方在本帧中该填充的比特信息全为空闲信息的符 号的数量为 K, 以使得接收方接收到该指示后不对这 K个符号进行处理， 从 而进一步降低了信号处理的功耗。
实施例四 本实施例在上述实施例一、 实施例二的基础上， 还增加了同步处理操作， 以解决现有 DSL系统中可能存在的近端串扰问题。 在传统 TDD DSL系统中，上下行频媒一般会存在重叠现象，如果上下行 时隙不同步， 当某一端口正在接收上行信号时， 另外一个端口可能正在发送 下行信号， 此时， 下行发送的信号会对其他端口产生近端串扰， 干扰上行的 接收， 尤其在上下行频谱重叠的部分会产生较大干扰， 将严重影响信号的解 调， 因此， 本实施例进一步增加了同步处理操作， 使得下行的各个 DSL端口 的符号与时隙同步， 以解决 TDD DSL系统的近端串扰的问题。 具体地， 收发器发送帧时， 要实现各端口之间的上下行时隙同步。 如图 2所示， 端口 1、 端口 2、 …端口 n端口之间实现下行时隙同步， 能够避免端 口 1、 端口 2、 …端口 n端口之间下行帧的串扰， 即解决 DSL系统的近端串 扰问题。 上行同理。
以下描述本发明实施例的 DSL系统中， DSL端口之间下行时隙同步的方 法。 具体地， 可利用同源时钟、 符号周期参数、 上下行时间比例信息， 产生 下行时隙同步信号。 各个 DSL端口参照这个下时隙同步信号， 进行上下行时 隙切换。 或者， 也可以如图 3所示， 实现各个 DSL端口与网络时间源同步， 即将 某一个参考时间作为参考， 计算下行时隙与参考时间的偏移， 得到下行时隙 的起始时间与结束时间， 从而实现下行时隙的同步。 在实施例一中， 由于发送的帧中承载空闲信息的所有 K个符号的信号发 送功率为 0, 使得发送的帧中部分符号承载功率， 部分符号不承载功率， 容 易对其他用户的远端串扰产生抖动。 如图 4所示， 用户 1对用户 2造成的远 端串扰抖动， 使得被影响的用户 2测量得到的串扰噪声偏低， 从而造成在有 远端串扰的符号上的噪声保护能力不够。 因此， 可选地， 在达到了 DSL系统各个 DSL端口的帧进行同步之后， 各个 DSL端口在所有帧的预先指定的符号集合 L上， 信号发送功率不为 0, 即将该预先指定的符号集合 L的信号发送功率置为非 0。 即便该预先指定的 符号集合 L中部分符号承载的是空闲信息， 发送功率也不为 0。 如图 5所示， 各个接收器在该预先指定的符号集合 L上， 进行信噪比（SNR ) 测量， 确保 串扰噪声不会被错误估计， 以解决远端串扰抖动问题。 本领域普通技术人员可以理解： 实现上述各方法实施例的全部或部分步 骤可以通过程序指令相关的硬件来完成。 前述的程序可以存储于一计算机可 读取存储介质中。 该程序在执行时， 执行包括上述各方法实施例的步骤； 而 前述的存储介质包括： ROM, RAM, 磁碟或者光盘等各种可以存储程序代码 的介质。
图 6A为本发明实施例提供的数字用户线的信号处理装置的结构示意图。 本发明实施例提供的信号处理装置可为 DSL系统中用户端 xDSL收发器， 也 可为 DSL系统中局端 xDSL收发器， 如图 6A所示， 包括： 承载模块 61、 剩 余符号获取模块 62及添加及发送模块 63。 承载模块 61用于采用待发送的帧的符号承载待发送数据。 剩余符号获取模块 62用于获取承载了该待发送数据的待发送的帧中，未 承载该待发送数据的剩余符号的数量， 具体详见图 1A〜图 1B的说明。 添加及发送模块 63用于在承载了该待发送数据的待发送的帧中，添加该 剩余符号的数量信息， 并发送承载了该待发送数据且添加了该剩余符号的数 量信息的帧， 具体详见图 1A〜图 1C的说明。 可选地， 本发明实施例提供的信号处理装置还包括： 第一功率设置模块， 用于在该添加及发送模块发送该剩余符号时， 将该 剩余符号的信号发送功率置为 0。
可选地， 本发明实施例提供的信号处理装置还包括：
同步信号产生模块， 用于产生下行时隙同步信号； 并且， 该添加及发送模块， 还可以用于在该下行时隙同步信号的触发下 发送承载了该待发送数据且添加了该剩余符号的数量信息的发送帧。 如图 6B所示，该同步信号产生模块可至少利用同源时钟、符号周期参数、 上下行时间比例信息， 产生下行时隙同步信号。 各个端口如端口 1、 端口 2 及端口 3参照这个下时隙同步信号， 进行上下行时隙切换。 其中， 同源时钟 应用于各个端口， 用于产生采样时钟。 可选地， 该第一功率设置模块还用于在该添加及发送模块在该下行时隙 同步信号的触发下发送该发送帧时， 将该发送帧中预先指定的符号集合中所 有符号的信号发送功率置为非 0, 该发送帧为承载了该待发送数据且添加了 该剩余符号的数量信息的待发送的帧。 可选地， 本发明实施例提供的信号处理装置还包括： 符号替换模块， 用于将该剩余符号替换为接收方已知的空闲符号。 可选地， 该空闲符号与承载该发送数据的最后一个符号相同， 或者为收 发双方预先约定调制方式及比特 7 载内容的特定符号。 可选地， 该符号替换模块可以具体用于将该剩余符号中的其中一部分符 号替换为接收方已知的空闲符号；
相应地， 该信号处理装置还包括： 第二功率设置模块， 用于将该剩余符号中的另一部分符号的信号发送功 率置为 0。 本发明实施例中， 数字用户线的信号处理装置通过添加及发送模块在待 发送的帧中添加未承载该待发送数据的剩余符号的数量信息， 使得接收方能 够获知未承载该待发送数据的剩余符号的信息，从而不对剩余符号进行处理， 节约了 TDD DSL系统中信号处理功率， 降低了功耗， 使得 TDD DSL系统实 现了节能。 本发明实施例提供的数字用户线系统包括上述装置实施例提供的任一种 数字用户线的信号处理装置。 以图 7为例， 本发明实施例提供的数字用户线系统包括用户端 xDSL收 发器 720和局端 xDSL收发器 750。 局端 xDSL收发器 750可以设置在 DSL 接入复用器（DSL Access Multiplexer, DSLAM ), 通常， DSLAM可以包括多 个局端 xDSL收发器 750, 用来提供多路 DSL接入。 通带传输的 xDSL采用 离散多音频调制 （ Discrete Multi-Tone Modulation, DMT )技术进行调制和解 调。
如图 7所示， 用户端 xDSL收发器 720包括用户端收发单元 721和分离 / 整合器 722。局端 xDSL收发器 750包括局端收发单元 752和分离 /整合器 751。 其中， 用户端收发单元 721及局端收发单元 752可为上述装置实施例提 供的任一种数字用户线的信号处理装置。 在上行方向，用户端收发单元 721接收来自计算机 710的 DSL业务信号 , 并对所收到的 DSL业务信号进行放大处理。 然后， 用户端收发单元 721将处 理后的 DSL业务信号发送至分离 /整合器 722。 分离 /整合器 722将来自用户端收发单元 721的 DSL业务信号和电话终端 730的 POTS信号进行整合处理， 比如对 DSL业务信号和 POTS信号进行复 用， 并将整合后的信号通过 UTP 740的传输。 局端 xDSL收发器 750中的分离 /整合器 751接收用户端 xDSL收发器 720 整合处理后的信号。分离 /整合器 751将接收的信号进行分离，将其中的 POTS 信号发送至公用电话交换网（ Public Switched Telephone Network, PSTN ) 760, 将其中的 DSL业务信号发送至局端 xDSL收发器 750的局端收发单元 752。 局端收发单元 752再将收到的 DSL业务信号进行放大处理，之后发送至网络 管理系统（Network Management System, NMS ) 770。 在信号的下行方向， 则信号按照与上述相反的顺序进行处理和传输。 本发明实施例提供的数字用户线系统通过采用上述装置实施例提供的任 一种信号处理装置， 在信号处理方法时， 通过在待发送的帧中添加未承载该 待发送数据的剩余符号的数量信息 , 使得接收方能够获知未承载该待发送数 据的剩余符号的信息，从而不对剩余符号进行处理，节约了 TDD DSL系统中 信号处理功率， 降低了功耗， 使得 TDD DSL系统实现了节能。 最后应说明的是： 以上各实施例仅用以说明本发明的技术方案， 而非对 其限制； 尽管参照前述各实施例对本发明进行了详细的说明， 本领域的普通 技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改， 或者对其中部分或者全部技术特征进行等同替换； 而这些修改或者替换， 并 不使相应技术方案的本质脱离本发明各实施例技术方案的范围。

Claims

权 利 要求
1、 一种数字用户线的信号处理方法， 其特征在于， 包括： 采用待发送的帧的符号承载待发送数据；
获取承载了所述待发送数据的待发送的帧中， 未承载所述待发送数据 的剩余符号的数量； 在承载了所述待发送数据的待发送的帧中， 添加所述剩余符号的数量 信息 , 并发送承载了所述待发送数据并且添加了所述剩余符号的数量信息 的帧。
2、 根据权利要求 1所述方法， 其特征在于， 发送所述剩余符号时， 将 所述剩余符号的信号发送功率置为 0。
3、 根据权利要求 2所述方法， 其特征在于， 所述发送承载了所述待发送数据并且添加了所述剩余符号的数量信息 的帧包括： 产生下行时隙同步信号， 并在所述下行时隙同步信号的触发下， 发送承载了该待发送数据且添加了该剩余符号的数量信息的发送帧。
4、 根据权利要求 2所述方法， 其特征在于， 还包括： 在发送所述发送帧时， 将所述发送帧中预先指定的符号集合中所有符 号的信号发送功率置为非 0,所述发送帧为承载了所述待发送数据且添加了 所述剩余符号的数量的帧。
5、 根据权利要求 1所述方法， 其特征在于， 还包括： 将所述剩余符号 替换为接收方已知的空闲符号。
6、 根据权利要求 5所述方法， 其特征在于， 所述空闲符号与承载所述 发送数据的最后一个符号相同， 或者为收发双方预先约定调制方式及比特 承载内容的特定符号。
7、 根据权利要求 1所述方法， 其特征在于， 还包括： 将所述剩余符号 中的其中一部分符号替换为接收方已知的空闲符号， 将所述剩余符号中的 另一部分符号的信号发送功率置为 0。
8、 一种数字用户线的信号处理装置， 其特征在于， 包括： 承载模块， 用于采用待发送的帧的符号承载待发送数据；
剩余符号获取模块， 用于获取承载了所述待发送数据的待发送的帧中 , 未承载所述待发送数据的剩余符号的数量； 添加及发送模块， 用于在承载了所述待发送数据的待发送的帧中， 添 加所述剩余符号的数量信息， 并发送承载了所述待发送数据并且添加了所 述剩余符号的数量信息的帧。
9、 根据权利要求 8所述装置， 其特征在于， 还包括： 第一功率设置模块， 用于在所述添加及发送模块发送所述剩余符号时， 将所述剩余符号的信号发送功率置为 0。
10、 根据权利要求 9所述装置， 其特征在于， 还包括：
同步信号产生模块， 用于产生下行时隙同步信号； 其中， 所述添加及发送模块， 用于在所述下行时隙同步信号的触发下 发送承载了该待发送数据且添加了该剩余符号的数量信息的发送帧。
11、 根据权利要求 9 所述装置， 其特征在于， 所述第一功率设置模块 还用于在所述添加及发送模块发送所述发送帧时， 将所述发送帧中预先指 定的符号集合中所有符号的信号发送功率置为非 0,所述发送帧为承载了所 述待发送数据且添加了所述剩余符号的数量信息的帧。
12、 根据权利要求 8所述装置， 其特征在于， 还包括： 符号替换模块， 用于将所述剩余符号替换为接收方已知的空闲符号。
13、 根据权利要求 12所述装置， 其特征在于， 所述空闲符号与承载所 述发送数据的最后一个符号相同， 或者为收发双方预先约定调制方式及比 特承载内容的特定符号。
14、 根据权利要求 8 所述装置， 其特征在于， 所述符号替换模块具体 用于将所述剩余符号中的其中一部分符号替换为接收方已知的空闲符号； 所述装置还包括： 第二功率设置模块， 用于将所述剩余符号中的另一部分符号的信号发 送功率置为 0。
15、一种数字用户线系统， 其特征在于， 包括局端 xDSL收发器和用户 端 xDSL收发器，所述局端 xDSL收发器通过双绞线连接到所述用户端 xDSL 收发器， 其中所述局端 xDSL收发器和 /或所述用户端 xDSL收发器包括上 述权利要求 8-14任一项所述的数字用户线的信号处理装置。
PCT/CN2012/074924 2012-04-28 2012-04-28 数字用户线的信号处理方法、装置及数字用户线系统 WO2012126411A2 (zh)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014059923A1 (en) * 2012-10-16 2014-04-24 Huawei Technologies Co., Ltd. Pre-fill retransmission queue

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20150067133A (ko) * 2012-07-27 2015-06-17 어댑티브 스펙트럼 앤드 시그널 얼라인먼트, 인크. 구리(copper)를 통한 시분할 듀플렉스 전송을 관리하는 방법들 및 관리 시스템
US9306733B2 (en) * 2013-02-28 2016-04-05 Broadcom Corporation Method of synchronizing a communication system
WO2014142721A1 (en) * 2013-03-14 2014-09-18 Telefonaktiebolaget L M Ericsson (Publ) Method and system for initiating bi-directional communication in a time-division duplex communication system
JP6330170B2 (ja) * 2013-05-05 2018-05-30 ランティック ドイチュラント ゲーエムベーハー 低電力モードのための時分割
CN103780438A (zh) * 2013-12-31 2014-05-07 广东九博电子科技有限公司 一种基于fpga网管系统的网管帧发送方法
US10080071B2 (en) * 2014-04-11 2018-09-18 Telefonaktiebolaget Lm Ericsson (Publ) Controlling time division duplex operation
US10686709B2 (en) * 2014-07-14 2020-06-16 Qualcomm Incorporated Methods and apparatus for channel usage indication
KR20180080920A (ko) * 2017-01-05 2018-07-13 삼성전자주식회사 비면허 대역을 이용한 통신 방법 및 이를 위한 장치
CN106992919A (zh) * 2017-03-31 2017-07-28 信阳师范学院 FTTdp+GDSL组网系统
CN111385109A (zh) * 2018-12-27 2020-07-07 中兴通讯股份有限公司 带宽承载方法及装置、存储介质

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6353628B1 (en) * 1998-12-15 2002-03-05 Nortel Networks Limited Apparatus, method and system having reduced power consumption in a multi-carrier wireline environment
ATE341918T1 (de) * 2000-03-22 2006-10-15 Cit Alcatel Verfahren und vorrichtung zur wiederzusammensetzung von rahmen
EP1976140A1 (en) * 2007-03-26 2008-10-01 Nokia Siemens Networks Gmbh & Co. Kg Method and device for reducing transmission power of packet oriented data and communication system comprising such device
US8494072B2 (en) * 2007-11-06 2013-07-23 Qualcomm Incorporated Frequency diverse control mapping of channel elements to resource elements
CN101562900B (zh) * 2008-04-16 2011-11-30 中兴通讯股份有限公司 基于共享基带池和分布式射频单元的系统和方法
KR101520697B1 (ko) * 2008-08-29 2015-05-21 엘지전자 주식회사 릴레이 시스템을 지원하기 위한 제어정보 전송방법
CN101753253B (zh) * 2008-12-05 2013-01-23 华为技术有限公司 Gsm分组域编解码的方法、设备及系统
KR20130042549A (ko) * 2010-06-18 2013-04-26 쿄세라 코포레이션 복수의 서브프레임을 통해 배포되는 제어 정보를 갖는 제어 채널 아키텍처
US9240822B2 (en) * 2011-08-15 2016-01-19 Mediatek Inc. Method of handling power reduction at transmitter and related communication device
EP2587867B1 (en) * 2011-10-30 2018-07-11 Lantiq Beteiligungs-GmbH & Co.KG Power saving mode for multi carrier-transmission

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014059923A1 (en) * 2012-10-16 2014-04-24 Huawei Technologies Co., Ltd. Pre-fill retransmission queue
US9288152B2 (en) 2012-10-16 2016-03-15 Futurewei Technologies, Inc. Pre-fill retransmission queue

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