WO2013097220A1 - 基于使能信号线反馈实现检错重发的系统及方法 - Google Patents

基于使能信号线反馈实现检错重发的系统及方法 Download PDF

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Publication number
WO2013097220A1
WO2013097220A1 PCT/CN2011/085141 CN2011085141W WO2013097220A1 WO 2013097220 A1 WO2013097220 A1 WO 2013097220A1 CN 2011085141 W CN2011085141 W CN 2011085141W WO 2013097220 A1 WO2013097220 A1 WO 2013097220A1
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data
error
signal line
unit
enable signal
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PCT/CN2011/085141
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English (en)
French (fr)
Inventor
孟真
阎跃鹏
于进勇
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中国科学院微电子研究所
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Priority to PCT/CN2011/085141 priority Critical patent/WO2013097220A1/zh
Publication of WO2013097220A1 publication Critical patent/WO2013097220A1/zh

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    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/38Information transfer, e.g. on bus
    • G06F13/382Information transfer, e.g. on bus using universal interface adapter
    • G06F13/387Information transfer, e.g. on bus using universal interface adapter for adaptation of different data processing systems to different peripheral devices, e.g. protocol converters for incompatible systems, open system

Definitions

  • the present invention relates to the field of data transmission technologies, and in particular, to a system and method for implementing error detection retransmission based on enabling signal line feedback.
  • Error detection and retransmission is a commonly used error control method in data transmission. It is effective when burst errors and channel interference are serious, and is widely used in computer data communication, and can achieve very high error rate indicators.
  • the receiving end checks the data received from the transmitting end. If an error occurs in the data transmission, the transmitting end requests the transmitting end to resend the set of data. , until the receiving end checks correctly, the sender can send the next set of data.
  • the error detection retransmission method can achieve a very high error rate indicator, but since this method requires error feedback and data retransmission, it will result in low efficiency.
  • the time taken for error detection and retransmission is divided into three parts. The first part is the transmission time of the data code and the error detection code, and the second part is the retransmission time of the data code and the error detection code when the receiver detects the error. , Part 3 is the time to communicate with the sender when the receiver detects an error. The first two parts belong to the time required for data transmission. Under the determined transmission conditions, the time of these two parts will be determined. Therefore, improving the efficiency of the error detection retransmission mode can only reduce the feedback described in Part 3. Communication time.
  • the encoding and decoding are generally complicated, and the encoding and decoding need to take extra time beyond the data transmission, thereby causing the third part as described above to take a long time, thereby causing The efficiency of the error detection retransmission method is reduced. If the complexity of encoding and decoding can be reduced; or feedback communication is performed in the background, so that feedback encoding, decoding and data transmission can be performed simultaneously; then the error feedback time can be reduced, thereby effectively increasing The efficiency of the error detection retransmission method.
  • the present invention provides a system for implementing error detection retransmission based on enabling signal line feedback, including a sender, a receiver, and an enable signal line connected between the sender and the receiver.
  • a data transmission line the system transmits error retransmission information from the receiver to the sender by using a change of high and low level parameters on the enable signal line, wherein the sender has a sender logic and an input and output unit, and the receiver has a receiver Logic and input/output unit, when the output of one of the sender logic and the input/output unit and the receiver logic and the input/output unit is low, the output of the enable signal line is low, so that the receiver
  • the error retransmission information is transmitted to the sender, and the feedback process of the error retransmission information is set in the same manner in the background when the data is transmitted, so that the error retransmission information feedback does not need to occupy the time other than the data transmission.
  • the sender includes a sender enable signal line level control module, a data packet grouping module, an error detection code encoding module, and a data transmission register
  • the sender enable signal line level control module includes transmitting data bits.
  • the units are sequentially connected, and the sender logic is sequentially connected to the input/output unit, the error retransmission detecting unit, and the transmission data bit counting unit.
  • the receiver includes a receiver enable signal line level control module, a data receiving register, an error detection code decoding module, and a packet reassembly module
  • the receiver enable signal line level control module includes data transmission.
  • the data receiving register is connected to the receiving clock unit
  • the receiving clock unit is connected to the data receiving register, the receiving state detecting unit and the error retransmission enabling unit, and the error retransmission enabling unit and the detecting
  • the present invention also provides a method for implementing error detection retransmission based on enabling signal line feedback.
  • the method uses the change of high and low level parameters on the enable signal line to retransmit the error. Transmitted by the receiver to the sender, when the output of one of the sender logic and the input and output unit and the receiver logic and the input and output unit is low, the output of the enable signal line is low, so that The receiver transmits the error retransmission information to the sender.
  • the use of the change of the high and low level parameters on the enable signal line transmits the error retransmission information to the sender by the receiver, and further includes: the logic of the sender and the input and output unit and the receiver logic and the input and output unit When the output is high, the output of the enable signal line is high and the data transmission is normal.
  • the present invention has the following beneficial effects:
  • the system and method for implementing error detection retransmission based on enabling signal line feedback provided by the present invention, using an enable signal line for error retransmission information feedback, so that the sender and the receiver can pass the enable signal line under different conditions.
  • the single level change replaces the code for bidirectional information transmission, and the error retransmission information level feedback process is performed in the background while the data is transmitted. Since the error feedback communication process of the error detection retransmission method does not take any extra time, all the time can be used for data transmission, thereby greatly improving the error detection and retransmission mode. Work efficiency.
  • the system and method for implementing error detection and retransmission based on the enable signal line feedback do not need to use complex coding and decoding to transmit feedback information, and use the edge of the high and low level change on the enable signal line to make an error. Resending information feedback, directly triggering the retransmission process with the edge of high and low level changes directly in the background of data transmission, and using all the time for data transmission, thereby greatly improving the working efficiency of error detection and retransmission mode.
  • the edge for transmitting high and low level changes of the error retransmission information is the last bit transmission process of each group of codes in which an error occurs. The same is generated by the peers, so that the error retransmission information feedback is completely placed in the background of the data transmission without occupying the time other than the data transmission.
  • FIG. 1 is a schematic diagram of a system for implementing error detection retransmission based on enabling signal line feedback in accordance with an embodiment of the present invention
  • FIG. 2 is a schematic diagram showing the working process when the system shown in FIG. 1 is used without error in the transmission process according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of a working process when an error occurs in a transmission process using the system shown in FIG. 1 according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of error feedback when a bit error occurs during transmission using the system of FIG. 1 in accordance with an embodiment of the present invention.
  • the system and method for implementing error detection and retransmission based on enabling signal line feedback provide data transmission by using two lines of an enable signal line and a data transmission line, wherein the enable signal line is a bidirectional transmission line, and the present invention Utilizing the change of high and low level parameters on the enable signal line The error retransmission information is transmitted by the receiver to the sender.
  • FIG. 1 is a schematic diagram of a system for implementing error detection retransmission based on enabling signal line feedback according to an embodiment of the present invention, the system including a sender, a receiver, and a connection between the sender and the receiver. Between the enable signal line and the data transmission line, the system transmits the error retransmission information from the receiver to the sender by using the change of the high and low level parameters on the enable signal line, wherein the sender has the sender logic and the input and output unit
  • the receiver has a receiver logic and an input/output unit. When the output of the sender logic and the input/output unit and the receiver logic and the input/output unit is low, the output of the enable signal line is low. Level, so that the receiver transmits the error retransmission information to the sender.
  • the sender includes a sender enable signal line level control module, a packet grouping module, an error detection code encoding module, and a data transmission register, and the sender enable signal line level control module includes a transmission data bit counting unit and data transmission.
  • the data packet grouping module, the error detecting code encoding module and the data sending register are sequentially connected, and the data packet grouping module and the data transmitting register are both connected to the transmitting data bit counting unit, and the transmitting data bit counting unit
  • the data transmission enable signal flag unit and the sender logic are sequentially connected to the input/output unit, and the sender logic is sequentially connected to the input/output unit, the error retransmission detection unit, and the transmission data bit counting unit.
  • the receiver includes a receiver enable signal line level control module, a data receiving register, an error detection code decoding module, and a packet reassembly module
  • the receiver enable signal line level control module includes a data transmission enable signal detecting unit, A receiving state detecting unit, an error retransmission enabling unit, a receiving side clock unit, and a receiving side logic and an input/output unit connected to the enabling signal line.
  • the data receiving register, the error detecting code decoding module and the data packet recombining module are sequentially connected, and the data sending enable signal detecting unit is connected to the receiving logic and the input and output unit and the receiving state detecting unit, and the receiving a state detecting unit is connected to the data transmission enable signal detecting unit, the error detecting code decoding module, the data receiving register, and the receiving clock unit, the receiving clock unit and the data receiving register, the receiving state detecting unit, and The error retransmission enable unit is connected, the error retransmission enable unit is connected to the error detection code decoding module, the receiver clock unit, and the receiver logic and the input and output unit And the data receiving register is connected to the receiving state detecting unit, the receiving clock unit and the error detecting code decoding module, the error detecting code decoding module and the data receiving register, the receiving state detecting unit, and the error retransmission
  • the enabling unit is connected to the packet reassembly module.
  • the enable signal line is a bidirectional transmission line connected between the sender logic and the input/output unit and the receiver logic and the input/output unit, and the error retransmission information is transmitted by the receiver to the sender by using the change of the high and low parameters thereof.
  • the output of the transmitter logic and the input/output unit and the receiver logic and the input/output unit is low, the output of the enable signal line is low, and the sender logic and the input and output unit and the receiver When the output of the logic and the input/output unit is high, the output of the enable signal line is high.
  • the sender uses the enable signal line to transmit stop, start, transmit and terminate information of the data transmission, and simultaneously detects the error retransmission information sent by the receiver on the enable signal line; the receiver The error signal is transmitted by the enable signal line, and the stop, start, transmission and termination information of the data transmission transmitted by the sender on the enable signal line is detected.
  • the data transmission line is a unidirectional transmission line connected between the data transmission register and the data reception register for transmitting data in a unidirectional direction by the receiver.
  • the sender enable signal line level control module is operative to generate a high and low level to send stop, start, transmit and terminate information to the receiver, and to receive error retransmission information from the receiver.
  • the data packet grouping module is configured to receive data to be transmitted, and transmit the data to be transmitted to the error detection code encoding module under the control of the transmission data bit counting unit.
  • the error detection code encoding module is configured to perform error detection code encoding on the data to be transmitted after the packet, and transmit the encoded data to be transmitted to the data transmission register.
  • the data transmission register is configured to sequentially transmit the encoded data to be transmitted to the receiver through the data transmission line under the control of the transmission data bit counting unit.
  • the transmit data bit counting unit controls the data to be transmitted to be sequentially sent to the error detection code encoding module in groups after the sender data packet grouping module is to transmit the data packet. And controlling the data transmission register to send data bits according to the count value.
  • the error retransmission detecting unit is connected to the transmitting data bit counting unit and the transmitting logic and the input/output unit, according to the counting value of the transmitting data bit counting unit and the level value detected by the transmitting logic and the input/output unit. To determine the recipient Error resending the message.
  • the data transmission enable signal flag unit is connected to the transmission data bit counting unit and the sender logic and the input/output unit, and receives the received data by the sender logic and the input/output unit according to the count value of the transmission data bit counting unit.
  • the party sends stop, start, transfer, and termination information.
  • the receiver enable signal line level control module is configured to detect high and low levels on the enable signal line to receive stop, start, transmit, and terminate information from the sender, and transmit In the state, the error retransmission information is transmitted to the sender by pulling down the level of the enable signal line, and the error retransmission information is the second half of the reception after the last data bit of each group of erroneous data is received.
  • the feedback is performed within the clock cycle generated by the square clock unit, and no additional data transmission time is occupied.
  • the data receiving register is configured to receive and store data transmitted through the data transmission line under the control of the receiving state detecting unit and the receiving clock unit, and the data is stored according to a level change of a half cycle of each cycle of the receiving clock unit.
  • the edge triggers and transmits it to the error detection code decoding module.
  • the error detection code decoding module is configured to detect whether there is an error in the received packet data, and when an error occurs, notify the reception of the error information at the clock level change edge stored in the last data bit of each group of the erroneous data.
  • a status detecting unit and the error retransmission enabling unit to cause the error retransmission enabling unit to generate error retransmission information and output to the receiving logic and input/output unit in the background of data transmission, when no error occurs
  • the correct packet data is transferred to the packet reassembly module.
  • the packet reassembly module is used to reassemble the correct packet data into the original data of the sender.
  • the data transmission enable signal detecting unit is configured to detect a level change of the enable signal line and provide the received state detecting unit.
  • the receiving state detecting unit is configured to determine, according to the comprehensive information from the data sending enable signal detecting unit and the error detecting code decoding module, whether the state of the receiving party is stop, start, transmit, terminate, or error retransmission.
  • the receiving clock unit is controlled to be in a working and a stop state, respectively, in the normal receiving and non-receiving states.
  • the receiving clock unit is configured to control the data receiving register to use a half-cycle level edge change as a trigger to receive data bits according to a clock frequency in a normal receiving state, and to control the error retransmission enable when generating error resending information
  • the half-cycle clock when the unit receives the last data bit of the data group in which the error occurred.
  • the error retransmission information is sent at the time of the change edge.
  • the error retransmission enable unit is configured to pass the receiver logic and the input and output unit to the last data of the erroneous data group under the clock control of the receiver clock unit after the error detection code decoding module finds the error information.
  • the half cycle clock level change edge timing at the time of bit reception transmits error retransmission information to the enable signal line.
  • the present invention also provides a method for implementing error detection retransmission based on the enable signal line feedback based on the system for implementing error detection retransmission based on the enable signal line feedback shown in FIG. 1.
  • the method utilizes The change of the high and low parameters on the signal line transmits the error retransmission information to the sender by the receiver, and specifically includes: the output of one of the sender logic and the input and output unit and the receiver logic and the input and output unit is When low, the output of the enable signal line is low, so that the receiver transmits the error retransmission information to the sender; the output logic and the output of the input and output unit and the receiver logic and the input and output unit are both When it is high, the output of the enable signal line is high and the data transmission is normal.
  • the enable signal line is a bidirectional transmission line, and the change of the high and low level parameters on the enable signal line transmits the error retransmission information to the sender by the receiver, and the method further includes: sending, by the sender, the enable signal line The data transmission stops, starts, transmits and terminates information, and detects the error retransmission information sent by the receiver on the enable signal line; the receiver uses the enable signal line to send the error retransmission information, and simultaneously detects the sender The enable signal line transmits the stop, start, transmit and terminate information of the data transmission.
  • the method further includes: the data packet grouping module receiving the data to be transmitted, and the data to be transmitted After the packet is transmitted to the error detection code encoding module; the error detection code encoding module performs error detection code encoding on the data to be transmitted after the packet, and transmits the encoded data to be transmitted to the data transmission register; the data transmission register sequentially encodes the code The data to be transmitted is transmitted to the data receiving register through the data transmission line; the data receiving register receives the data transmitted through the data transmission line, and transmits the data to the error detecting code decoding module; the error detecting code decoding module detects whether the received packet data has an error, The error information is notified to the reception state detecting unit and the error retransmission enable unit when an error occurs, to generate error retransmission information at the half cycle clock level change edge time when the last data bit of the data group in which the error occurs is received. ;
  • FIG. 2 The following takes FIG. 2 as an example to illustrate the working process of transmitting a data packet without error in the data transmission process.
  • the sender packet grouping module groups packets of equal length.
  • the sender data transmission enable signal flag unit When the data transmission stop state is not performed, the sender data transmission enable signal flag unit outputs a low level.
  • the receiver's error retransmission enable unit outputs the high battery. Therefore, the enable signal line is pulled down to a low level at the logic of both ends and the control of the input/output unit.
  • the data to be transmitted When the input end transmits the data to be transmitted, the data to be transmitted first enters the data packet grouping module, and the data packet grouping module performs equal length grouping on the data to be transmitted, and then sends each group of data to the error detection under the control of the sending data bit counting unit.
  • the code encoding module simultaneously sends the packet information into the transmit data bit counting unit.
  • the transmission data bit counting unit combines the packet information and the corresponding error detection code encoding manner to calculate the length of each group of data encoded k.
  • the error detection code coding module encodes each group of data into an error detection code and sends it to the data transmission register for transmission.
  • the data transmission enable signal flag unit At the beginning of data transmission, the data transmission enable signal flag unit generates a rising edge and outputs a high level. At this time, since the receiver does not detect the error information, the error retransmission enable unit outputs a high level, thus enabling The signal line is still high under the control of both logic and input and output units. While the rising edge of the signal line level is enabled, the transmission data bit counting unit controls the data transmission register to sequentially serially transmit the encoded data packet, until the data packet is completely transmitted, the data transmission enable signal flag unit re-outputs the low battery. Ping, the enable signal line is pulled low; at the same time, the transmit data bit count unit is cleared.
  • the data transmission enable signal monitoring unit monitors the level of the enable signal line in real time, and at the start of the data transmission, the data transmission enable signal monitoring unit monitors the high level, and notifies the receiving state detecting unit of the information.
  • the information of the error detection code decoding module received by the receiving state detecting unit at this time is error-free. Therefore, it is determined that the state at this time is the transmission starting state, that is, the data receiving register is notified to start receiving data.
  • the error detection code decoding module sequentially decodes each received group of data, and determines that the data before encoding is sequentially stored in the data packet reassembly module after no error. Until the data is transferred, the data
  • the transmission enable signal monitoring unit detects the low level, and informs the receiving state detecting unit of the information, and the information of the error detecting code decoding module received by the receiving state detecting unit at this time is error-free, so that the state at this time is determined to be a transmission. Termination status. At this point, the original data packet transmitted can be obtained in the packet reassembly module.
  • the error retransmission enable unit When the error retransmission enable unit outputs a low level, since the sender is in the normal data transmission state, the data transmission enable signal flag unit outputs a high level at this time, so the enable signal line is at both ends of the logic and the input and output unit. The level is controlled to be pulled low, and a falling edge is generated on the enable signal line.
  • the sender's error retransmission monitoring unit detects that the enable signal line level is low, and detects that the count value of the transmission data bit count unit is 2k. The total number of bits after the data packet is encoded is nk, so that the data packet has not been transmitted, so the error retransmission monitoring unit determines that the state at this time is an error retransmission state.
  • the error retransmission monitoring unit notifies the transmission data bit counting unit of the error retransmission information.
  • the enable unit resumes the output high level due to the error retransmission enable unit, so the enable signal line also returns to the high level at the same time, so the transmission process is restored to the transmission state.
  • the sender will resend the previous set of data in the next normal transmission state, as shown in Figure 3.
  • the transmit data bit count unit stops counting and keeps the count value of 2k unchanged until the data transmission register will be the second group.
  • the encoded data is resent and continues to count.
  • the receiving state detecting unit On the receiving side, the receiving state detecting unit also monitors the low level signal. At this time, the receiving state monitoring unit simultaneously receives the error information provided by the error detecting code decoding module, and therefore determines that the state is not the transmission termination state, but Error resending state. Therefore, when the high level is resumed after the low period of the half cycle, the data receiving register will receive the next set of data. The previous group 2 data is overwritten, and the retransmission of the second group of data is received. This completes the entire process of error retransmission of a data group. After the error retransmission process is completed, the transmission data bit counting unit restarts counting from 2k, and the entire data packet transmission is completed as in the process shown in FIG.

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Abstract

本发明公开了一种基于使能信号线反馈实现检错重发的系统及方法,该系统包括发送方、接收方,以及连接于该发送方与该接收方之间的使能信号线及数据传输线,该系统利用该使能信号线上高低电平参量的变化将错误重发信息由接收方传输给发送方该发送方具有发送方逻辑与输入输出单元,该接收方具有接收方逻辑与输入输出单元,在发送方逻辑与输入输出单元与接收方逻辑与输入输出单元二者其中之一的输出为低电平时,该使能信号线的输出为低电平,以使接收方将该错误重发信息传输给发送方。利用本发明,采用使能信号线上的高低电平变化的边沿来进行错误重发信息反馈,直接利用高低电平变化的边沿对重发过程进行触发,提高了错误检错重发方式的工作效率。

Description

基于使能信号线反馈实现检错重发的系统及方法
技术领域 本发明涉及数据传输技术领域, 尤其涉及一种基于使能信号线反馈 实现检错重发的系统及方法。
背景技术 检错重发是数据传输中一种常用的差错控制方式, 在对突发错误和 信道干扰较严重时有效, 在计算机数据通讯中有广泛应用, 能实现非常 高的误码率指标。
在采用检错重发方式工作时, 发送端发送一组数据后, 接收端对接 收自发送端的数据进行检查, 如果检测到数据传输中出现错误, 则通过 反馈信道要求发送端重新发送该组数据, 直到接收端检查无误, 发送端 才能进行下一组数据的发送。
检错重发方式能够实现很高的误码率指标, 但是由于此方式需要进 行错误反馈和数据重发的过程, 因此会导致其工作效率较低。 而检错重 发方式所花费的时间分为 3部分, 第 1部分为数据码和检错码的传输时 间, 第 2部分为当接收方检测到错误时数据码和检错码的重发时间, 第 3 部分为当接收方检测到错误时与发送方通讯进行反馈的时间。 其中前 2部分属于数据传输所需的时间, 在确定的传输条件下, 这 2部分的时 间将是确定的, 因此提高检错重发方式的工作效率只能降低第 3部分所 述的进行反馈的通讯时间。
而现有的反馈通讯中编码、 解码均一般比较复杂, 且编码、 解码均 需要占用数据传输之外的额外的时间来进行, 从而导致如上所述的第 3 部分耗费较长的时间, 从而致使检错重发方式的工作效率降低。 如果能 够降低编码、解码的复杂程度; 或者在后台进行反馈通讯, 使反馈编码、 解码与数据传输同歩进行; 则可以减少错误反馈时间, 从而有效的增加 检错重发方式的工作效率。
发明内容 有鉴于此, 本发明的主要目的在于提供一种基于使能信号线反馈实 现检错重发的系统及方法, 以提高检错重发方式的工作效率。
为达到上述目的, 本发明提供了一种基于使能信号线反馈实现检错 重发的系统, 包括发送方、 接收方, 以及连接于该发送方与该接收方之 间的使能信号线及数据传输线, 该系统利用该使能信号线上高低电平参 量的变化将错误重发信息由接收方传输给发送方, 其中该发送方具有发 送方逻辑与输入输出单元, 该接收方具有接收方逻辑与输入输出单元, 在发送方逻辑与输入输出单元与接收方逻辑与输入输出单元二者其中 之一的输出为低电平时, 该使能信号线的输出为低电平, 以使接收方将 该错误重发信息传输给发送方, 并且将错误重发信息的反馈过程设定于 数据传输时在后台同歩进行, 使错误重发信息反馈无需占用数据传输之 外的时间。
上述方案中, 该发送方包括发送方使能信号线电平控制模块、 数据 包分组模块、 检错码编码模块和数据发送寄存器, 且该发送方使能信号 线电平控制模块包括发送数据比特计数单元、 数据发送使能信号标志单 元、 错误重发检测单元以及与该使能信号线连接的所述发送方逻辑与输 入输出单元; 其中, 该数据包分组模块、 该检错码编码模块和该数据发 送寄存器依次连接, 该数据包分组模块和该数据发送寄存器均连接于该 发送数据比特计数单元, 该发送数据比特计数单元、 该数据发送使能信 号标志单元及该发送方逻辑与输入输出单元依次连接, 且该发送方逻辑 与输入输出单元、 该错误重发检测单元及该发送数据比特计数单元依次 连接。
上述方案中, 该接收方包括接收方使能信号线电平控制模块、 数据 接收寄存器、 检错码解码模块和数据包重组模块, 且该接收方使能信号 线电平控制模块包括数据发送使能信号检测单元、 接收状态探测单元、 错误重发使能单元、 接收方时钟单元以及与该使能信号线连接的所述接 收方逻辑与输入输出单元; 其中, 该数据接收寄存器、 该检错码解码模 块和该数据包重组模块依次连接, 该数据发送使能信号检测单元与该接 收方逻辑与输入输出单元及该接收状态探测单元相连接, 该接收状态探 测单元与该数据发送使能信号检测单元、 该检错码解码模块、 该数据接 收寄存器及该接收方时钟单元相连接, 该接收方时钟单元与该数据接收 寄存器、 该接收状态探测单元和该错误重发使能单元相连接, 该错误重 发使能单元与该检错码解码模块、 该接收方时钟单元和该接收方逻辑与 输入输出单元相连接, 该数据接收寄存器与该接收状态探测单元、 该接 收方时钟单元和该检错码解码模块相连接, 该检错码解码模块与该数据 接收寄存器、 该接收状态探测单元、 该错误重发使能单元和该数据包重 组模块相连。
为达到上述目的, 本发明还提供了一种基于使能信号线反馈实现检 错重发的方法, 在数据传输时, 该方法利用使能信号线上高低电平参量 的变化将错误重发信息由接收方传输给发送方, 在发送方逻辑与输入输 出单元与接收方逻辑与输入输出单元二者其中之一的输出为低电平时, 该使能信号线的输出为低电平, 以使接收方将该错误重发信息传输给发 送方。
上述方案中, 所述利用使能信号线上高低电平参量的变化将错误重 发信息由接收方传输给发送方, 还包括: 在发送方逻辑与输入输出单元 与接收方逻辑与输入输出单元的输出均为高电平时, 该使能信号线的输 出为高电平, 数据传输正常。
从上述技术方案可以看出, 本发明具有以下有益效果:
1、 本发明提供的基于使能信号线反馈实现检错重发的系统及方法, 采用使能信号线进行错误重发信息反馈, 使发送方和接收方可以通过使 能信号线上不同条件下的单一电平变化替代编码来进行双向信息传输, 并且将错误重发信息电平反馈过程于数据传输时在后台同歩进行。 由于 这种检错重发方式的错误反馈通讯过程无需占用任何额外的时间, 可以 将时间全部用于数据传输, 从而极大程度的提高了错误检错重发方式的 工作效率。
2、 本发明提供的基于使能信号线反馈实现检错重发的系统及方法, 无需采用复杂的编码、 解码来传递反馈信息, 采用使能信号线上的高低 电平变化的边沿来进行错误重发信息反馈, 直接于数据传输的后台利用 高低电平变化的边沿对重发过程进行触发, 将时间全部用于数据传输, 从而极大程度的提高了错误检错重发方式的工作效率。
3、 本发明提供的基于使能信号线反馈实现检错重发的系统及方法, 用于传递错误重发信息的高低电平变化的边沿是在出现错误的每组码 的最后一个比特传输过程中同歩产生的, 从而将错误重发信息反馈完全 置于数据传输的后台来进行, 无需占用数据传输之外的时间。
附图说明 图 1是依照本发明实施例基于使能信号线反馈实现检错重发的系统 的示意图;
图 2是依照本发明实施例利用图 1所示的系统在传输过程中无误码 时的工作过程示意图;
图 3是依照本发明实施例利用图 1所示的系统在传输过程中出现误 码时的工作过程示意图;
图 4是依照本发明实施例利用图 1所示的系统在传输过程中出现误 码时的错误反馈示意图。
具体实施方式 为使本发明的目的、 技术方案和优点更加清楚明白, 以下结合具体 实施例, 并参照附图, 对本发明进一歩详细说明。
本发明提供的基于使能信号线反馈实现检错重发的系统及方法, 采 用使能信号线及数据传输线这两条信号线协同来进行数据传输, 其中使 能信号线为双向传输线, 本发明利用该使能信号线上高低电平参量的变 化将错误重发信息由接收方传输给发送方。
如图 1所示, 图 1是依照本发明实施例基于使能信号线反馈实现检 错重发的系统的示意图, 该系统包括发送方、 接收方, 以及连接于该发 送方与该接收方之间的使能信号线及数据传输线, 该系统利用该使能信 号线上高低电平参量的变化将错误重发信息由接收方传输给发送方, 其 中该发送方具有发送方逻辑与输入输出单元, 该接收方具有接收方逻辑 与输入输出单元, 在发送方逻辑与输入输出单元与接收方逻辑与输入输 出单元二者其中之一的输出为低电平时, 该使能信号线的输出为低电 平, 以使接收方将该错误重发信息传输给发送方。
发送方包括发送方使能信号线电平控制模块、 数据包分组模块、 检 错码编码模块和数据发送寄存器, 且该发送方使能信号线电平控制模块 包括发送数据比特计数单元、 数据发送使能信号标志单元、 错误重发检 测单元以及与该使能信号线连接的发送方逻辑与输入输出单元。 其中, 该数据包分组模块、 该检错码编码模块和该数据发送寄存器依次连接, 该数据包分组模块和该数据发送寄存器均连接于该发送数据比特计数 单元, 该发送数据比特计数单元、 该数据发送使能信号标志单元及该发 送方逻辑与输入输出单元依次连接, 且该发送方逻辑与输入输出单元、 该错误重发检测单元及该发送数据比特计数单元依次连接。
接收方包括接收方使能信号线电平控制模块、 数据接收寄存器、 检 错码解码模块和数据包重组模块, 且该接收方使能信号线电平控制模块 包括数据发送使能信号检测单元、 接收状态探测单元、 错误重发使能单 元、 接收方时钟单元以及与该使能信号线连接的接收方逻辑与输入输出 单元。 其中, 该数据接收寄存器、 该检错码解码模块和该数据包重组模 块依次连接, 该数据发送使能信号检测单元与该接收方逻辑与输入输出 单元及该接收状态探测单元相连接, 该接收状态探测单元与该数据发送 使能信号检测单元、 该检错码解码模块、 该数据接收寄存器及该接收方 时钟单元相连接, 该接收方时钟单元与该数据接收寄存器、 该接收状态 探测单元和该错误重发使能单元相连接, 该错误重发使能单元与该检错 码解码模块、 该接收方时钟单元和该接收方逻辑与输入输出单元相连 接, 该数据接收寄存器与该接收状态探测单元、 该接收方时钟单元和该 检错码解码模块相连接, 该检错码解码模块与该数据接收寄存器、 该接 收状态探测单元、 该错误重发使能单元和该数据包重组模块相连。
使能信号线为双向传输线, 连接于发送方逻辑与输入输出单元与接 收方逻辑与输入输出单元之间, 利用其高低电平参量的变化将错误重发 信息由接收方传输给发送方, 在发送方逻辑与输入输出单元与接收方逻 辑与输入输出单元二者其中之一的输出为低电平时, 该使能信号线的输 出为低电平, 在发送方逻辑与输入输出单元与接收方逻辑与输入输出单 元的输出均为高电平时,该使能信号线的输出为高电平。在数据传输时, 该发送方利用该使能信号线发送数据传输的停止、 起始、 传输和终止信 息, 同时检测该接收方在该使能信号线上发送的错误重发信息; 该接收 方利用该使能信号线发送错误重发信息, 同时检测该发送方在该使能信 号线上发送数据传输的停止、 起始、 传输和终止信息。
数据传输线为单向传输线, 连接于该数据发送寄存器与该数据接收 寄存器之间, 用于由该发送方向该接收方单向传输数据。
参照图 1, 该发送方使能信号线电平控制模块用于产生高低电平以 给该接收方发送停止、 起始、 传输和终止信息, 并接收来自该接收方的 错误重发信息。 该数据包分组模块用于接收待传输数据, 并在该发送数 据比特计数单元的控制下将该待传输数据分组后传输给该检错码编码 模块。 该检错码编码模块用于对分组后的待传输数据进行检错码编码, 并将编码后的待传输数据传送至该数据发送寄存器。 该数据发送寄存器 用于在该发送数据比特计数单元的控制下依次将编码后的待传输数据 通过该数据传输线传送至该接收方。
在该发送方使能信号线电平控制模块中, 该发送数据比特计数单元 在该发送方数据包分组模块对待传输数据分组后, 控制该待传输数据按 组依次送入该检错码编码模块, 并控制该数据发送寄存器按照计数值发 送数据比特。 该错误重发检测单元与该发送数据比特计数单元及该发送 方逻辑与输入输出单元相连接, 依据该发送数据比特计数单元的计数值 与该发送方逻辑与输入输出单元检测到的电平值来判定来自接收方的 错误重发信息。 该数据发送使能信号标志单元与该发送数据比特计数单 元和该发送方逻辑与输入输出单元相连接, 依据该发送数据比特计数单 元的计数值, 通过该发送方逻辑与输入输出单元向该接收方发送停止、 起始、 传输和终止信息。
再参照图 1, 该接收方使能信号线电平控制模块用于检测该使能信 号线上的高低电平, 以接收来自该发送方的停止、 起始、 传输和终止信 息, 并在传输状态下依靠拉低该使能信号线的电平来向该发送方传输错 误重发信息, 该错误重发信息是在每组出现错误的数据的最后一个数据 比特接收后的后半个该接收方时钟单元产生的时钟周期内进行反馈的, 不额外占用数据传输时间。 该数据接收寄存器用于在该接收状态探测单 元、 该接收方时钟单元的控制下接收并存储通过数据传输线传送的数 据, 数据存储依据该接收方时钟单元每个周期的半周期时的电平变化边 沿进行触发, 并同歩将其传送给该检错码解码模块。 该检错码解码模块 用于检测接收到的分组数据是否存在错误, 在出现错误时, 在每组出现 错误的数据的最后一个数据比特存贮的时钟电平变化边沿时刻将错误 信息告知该接收状态探测单元和该错误重发使能单元, 以在数据传输的 后台使该错误重发使能单元同歩产生错误重发信息并输出至该接收方 逻辑与输入输出单元, 在无错误时将正确的分组数据传送至该数据包重 组模块。 该数据包重组模块用于将正确的分组数据重组恢复为该发送方 的原始数据。
在该接收方使能信号线电平控制模块中, 该数据发送使能信号检测 单元用于检测该使能信号线的电平变化, 提供给该接收状态探测单元。 该接收状态探测单元用于依据来自该数据发送使能信号检测单元、 该检 错码解码模块的综合信息实时判断该接收方所处的状态为停止、 起始、 传输、 终止还是错误重发, 在正常接收和非接收状态时分别控制该接收 方时钟单元处于工作和停止状态。 该接收方时钟单元用于在正常接收状 态时控制该数据接收寄存器按照时钟频率采用半周期的电平边沿变化 作为触发以接收数据比特, 并在产生错误重发信息时控制该错误重发使 能单元于出现错误的数据组的最后一个数据比特接收时的半周期时钟 电平变化边沿时刻发送错误重发信息。 该错误重发使能单元用于在该检 错码解码模块发现错误信息后, 在该接收方时钟单元的时钟控制下通过 该接收方逻辑与输入输出单元于出现错误的数据组的最后一个数据比 特接收时的半周期时钟电平变化边沿时刻向该使能信号线发送错误重 发信息。
基于图 1所示的基于使能信号线反馈实现检错重发的系统, 本发明 还提供了一种基于使能信号线反馈实现检错重发的方法, 在数据传输 时, 该方法利用使能信号线上高低电平参量的变化将错误重发信息由接 收方传输给发送方, 具体包括: 在发送方逻辑与输入输出单元与接收方 逻辑与输入输出单元二者其中之一的输出为低电平时, 该使能信号线的 输出为低电平, 以使接收方将该错误重发信息传输给发送方; 在发送方 逻辑与输入输出单元与接收方逻辑与输入输出单元的输出均为高电平 时, 该使能信号线的输出为高电平, 数据传输正常。
其中, 该使能信号线为双向传输线, 所述利用使能信号线上高低电 平参量的变化将错误重发信息由接收方传输给发送方, 还包括: 发送方 利用该使能信号线发送数据传输的停止、 起始、 传输和终止信息, 同时 检测接收方在该使能信号线上发送的错误重发信息; 接收方利用该使能 信号线发送错误重发信息, 同时检测发送方在该使能信号线上发送数据 传输的停止、 起始、 传输和终止信息。
所述在利用使能信号线上高低电平参量的变化将错误重发信息由 接收方传输给发送方的歩骤之前, 还包括: 数据包分组模块接收待传输 数据, 并将该待传输数据分组后传输给检错码编码模块; 检错码编码模 块对分组后的待传输数据进行检错码编码, 并将编码后的待传输数据传 送至数据发送寄存器; 数据发送寄存器依次将编码后的待传输数据通过 数据传输线传送至数据接收寄存器; 数据接收寄存器接收通过数据传输 线传送的数据, 并将其传送给该检错码解码模块; 检错码解码模块检测 接收到的分组数据是否存在错误, 在出现错误时将错误信息告知该接收 状态探测单元和该错误重发使能单元, 以于出现错误的数据组的最后一 个数据比特接收时的半周期时钟电平变化边沿时刻产生错误重发信息; 如果没有出现错误, 则将正确的分组数据传送至该数据包重组模块, 该 数据包重组模块将正确的分组数据重组恢复为传送方的原始数据。
下面以图 2为例说明数据传输过程中无误码出现的情况下传输一个 数据包的工作过程。 在本实施例的数据传输中, 发送方数据包分组模块 对数据包进行了等长度的分组。 在未进行数据传输的停止状态时, 发送 方数据发送使能信号标志单元输出低电平, 此时由于接收方没有检测到 误码信息, 因此接收方的错误重发使能单元输出为高电平, 因此使能信 号线在两端逻辑与输入输出单元的控制下线上电平被拉低为低电平状 态。
当输入端传入待传输数据时, 待传输数据首先进入数据包分组模 块, 数据包分组模块对待传输数据进行等长分组后将各组数据在发送数 据比特计数单元的控制下依次送入检错码编码模块, 同时将分组信息送 入发送数据比特计数单元。 发送数据比特计数单元结合分组信息和相应 的检错码编码方式, 计算出每组数据编码后的长度为 k。 检错码编码模 块将各组数据进行检错码编码后送入数据发送寄存器等待传输。
数据传输起始时, 数据发送使能信号标志单元产生上升沿, 输出高 电平, 此时由于接收方没有检测到误码信息, 因此错误重发使能单元输 出为高电平, 因此使能信号线在两端逻辑与输入输出单元的控制下仍然 为高电平。 在使能信号线电平上升沿的同时, 发送数据比特计数单元控 制数据发送寄存器依次串行发送编码后的数据包, 直至数据包全部发送 完毕时, 数据发送使能信号标志单元重新输出低电平, 将使能信号线拉 低; 同时, 发送数据比特计数单元清零。 在接收方, 数据发送使能信号 监测单元实时监测使能信号线的电平, 在数据传输起始时, 数据发送使 能信号监测单元监测到了高电平, 将此信息告知接收状态探测单元, 接 收状态探测单元此时接收到的检错码解码模块的信息为无误码出现, 因 此判断此时的状态为传输起始状态, 即通知数据接收寄存器开始接收数 据。
检错码解码模块依次对接收到的各组数据进行解码, 确定无误码后 将编码前的数据依次存储至数据包重组模块。 直至数据传输完毕, 数据 发送使能信号监测单元监测到了低电平, 将此信息告知接收状态探测单 元, 接收状态探测单元此时接收到的检错码解码模块的信息为无误码出 现, 因此判断此时的状态为传输终止状态。 此时数据包重组模块内即可 得到传输的原始数据包。
当数据包传输过程中出现误码需要重传时, 如图 3所示。 在图 3中 当传输到第 2组数据时, 传输过程中出现了误码。 此时如图 4所示接收 方时钟的下降沿时, 数据接收寄存器存储第 2组数据的最后一个比特, 检错码解码模块的检错电路也同时检测到第 2 组数据传输中出现了错 误。 因此检错码解码模块在时钟的下降沿同歩产生上升沿来输出高电平 标志信号来将错误信息传递至错误重发单元, 并保持半个时钟周期的高 电平后再重新输出低电平。 错误重发使能单元也随即输出低电平, 并保 持半个时钟周期的低电平后重新输出高电平。
错误重发使能单元输出低电平时, 由于发送方处于数据正常发送状 态, 因此数据发送使能信号标志单元此时输出为高电平, 因此使能信号 线在两端逻辑与输入输出单元的控制下电平被拉低, 使能信号线上产生 下降沿。此时,发送方的错误重发监测单元监测到使能信号线电平变低, 同时检测到发送数据比特计数单元的计数值为 2k。而数据包编码后的总 比特数为 nk, 因此说明数据包未发送完毕, 因此错误重发监测单元判断 此时的状态为错误重发状态。
错误重发监测单元将错误重发信息告知发送数据比特计数单元。 半 个时钟周期后, 由于误重发使能单元恢复输出高电平, 因此使能信号线 也同时恢复为高电平, 因此传输过程重新恢复为传输状态。 发送方在接 下来的正常发送状态时将重新发送上一组数据, 如图 3所示, 此时发送 数据比特计数单元停止计数, 保持 2k 的计数值不变, 直至数据发送寄 存器将第 2组编码后的数据重新发送完毕, 再开始继续计数。
在接收方, 接收状态探测单元也同样监测到低电平信号, 此时接收 状态监测单元同时接收到检错码解码模块所提供的误码信息, 因此判定 此时状态不是传输终止状态, 而是错误重发状态。 因此在半周期低电平 结束后重新恢复高电平时, 数据接收寄存器将接下来接收的一组数据覆 盖在之前的第 2组数据上, 完成重发的第 2组数据的接收。 至此完成一 个数据组的错误重发的全过程。 错误重发过程完毕后, 发送数据比特计 数单元自 2k重新开始计数, 同图 2所示的过程一样完成整个数据包的 传输。
以上所述的具体实施例, 对本发明的目的、 技术方案和有益效果进 行了进一歩详细说明, 所应理解的是, 以上所述仅为本发明的具体实施 例而已, 并不用于限制本发明, 凡在本发明的精神和原则之内, 所做的 任何修改、 等同替换、 改进等, 均应包含在本发明的保护范围之内。

Claims

权利要求
1、 一种基于使能信号线反馈实现检错重发的系统, 包括发送方、 接收方, 以及连接于该发送方与该接收方之间的使能信号线及数据传输 线, 其特征在于, 该系统利用该使能信号线上高低电平参量的变化将错 误重发信息由接收方传输给发送方, 其中该发送方具有发送方逻辑与输 入输出单元, 该接收方具有接收方逻辑与输入输出单元, 在发送方逻辑 与输入输出单元与接收方逻辑与输入输出单元二者其中之一的输出为 低电平时, 该使能信号线的输出为低电平, 以使接收方将该错误重发信 息传输给发送方。
2、 根据权利要求 1 所述的基于使能信号线反馈实现检错重发的系 统, 其特征在于, 该发送方包括发送方使能信号线电平控制模块、 数据 包分组模块、 检错码编码模块和数据发送寄存器, 且该发送方使能信号 线电平控制模块包括发送数据比特计数单元、 数据发送使能信号标志单 元、 错误重发检测单元以及与该使能信号线连接的所述发送方逻辑与输 入输出单元;
其中, 该数据包分组模块、 该检错码编码模块和该数据发送寄存器 依次连接, 该数据包分组模块和该数据发送寄存器均连接于该发送数据 比特计数单元, 该发送数据比特计数单元、 该数据发送使能信号标志单 元及该发送方逻辑与输入输出单元依次连接, 且该发送方逻辑与输入输 出单元、 该错误重发检测单元及该发送数据比特计数单元依次连接。
3、 根据权利要求 2所述的基于使能信号线反馈实现检错重发的系 统, 其特征在于,
该发送方使能信号线电平控制模块用于产生高低电平以给该接收 方发送停止、 起始、 传输和终止信息, 并接收来自该接收方的错误重发 自 .
该数据包分组模块用于接收待传输数据, 并在该发送数据比特计数 单元的控制下将该待传输数据分组后传输给该检错码编码模块;
该检错码编码模块用于对分组后的待传输数据进行检错码编码, 并 将编码后的待传输数据传送至该数据发送寄存器;
该数据发送寄存器用于在该发送数据比特计数单元的控制下依次 将编码后的待传输数据通过该数据传输线传送至该接收方。
4、 根据权利要求 3 所述的基于使能信号线反馈实现检错重发的系 统, 其特征在于, 该发送数据比特计数单元在该发送方数据包分组模块 对待传输数据分组后, 控制该待传输数据按组依次送入该检错码编码模 块, 并控制该数据发送寄存器按照计数值发送数据比特。
5、 根据权利要求 3 所述的基于使能信号线反馈实现检错重发的系 统, 其特征在于, 该错误重发检测单元与该发送数据比特计数单元及该 发送方逻辑与输入输出单元相连接, 依据该发送数据比特计数单元的计 数值与该发送方逻辑与输入输出单元检测到的电平值来判定来自接收 方的错误重发信息。
6、 根据权利要求 3 所述的基于使能信号线反馈实现检错重发的系 统, 其特征在于, 该数据发送使能信号标志单元与该发送数据比特计数 单元和该发送方逻辑与输入输出单元相连接, 依据该发送数据比特计数 单元的计数值, 通过该发送方逻辑与输入输出单元向该接收方发送停 止、 起始、 传输和终止信息。
7、 根据权利要求 1 所述的基于使能信号线反馈实现检错重发的系 统, 其特征在于, 该接收方包括接收方使能信号线电平控制模块、 数据 接收寄存器、 检错码解码模块和数据包重组模块, 且该接收方使能信号 线电平控制模块包括数据发送使能信号检测单元、 接收状态探测单元、 错误重发使能单元、 接收方时钟单元以及与该使能信号线连接的所述接 收方逻辑与输入输出单元;
其中, 该数据接收寄存器、 该检错码解码模块和该数据包重组模块 依次连接, 该数据发送使能信号检测单元与该接收方逻辑与输入输出单 元及该接收状态探测单元相连接, 该接收状态探测单元与该数据发送使 能信号检测单元、 该检错码解码模块、 该数据接收寄存器及该接收方时 钟单元相连接, 该接收方时钟单元与该数据接收寄存器、 该接收状态探 测单元和该错误重发使能单元相连接, 该错误重发使能单元与该检错码 解码模块、 该接收方时钟单元和该接收方逻辑与输入输出单元相连接, 该数据接收寄存器与该接收状态探测单元、 该接收方时钟单元和该检错 码解码模块相连接, 该检错码解码模块与该数据接收寄存器、 该接收状 态探测单元、 该错误重发使能单元和该数据包重组模块相连。
8、 根据权利要求 7 所述的基于使能信号线反馈实现检错重发的系 统, 其特征在于,
该接收方使能信号线电平控制模块用于检测该使能信号线上的高 低电平, 以接收来自该发送方的停止、 起始、 传输和终止信息, 并在传 输状态下依靠拉低该使能信号线的电平来向该发送方传输错误重发信 息, 该错误重发信息是在每组出现错误的数据的最后一个数据比特接收 后的后半个该接收方时钟单元产生的时钟周期内进行反馈的, 不额外占 用数据传输时间;
该数据接收寄存器用于在该接收状态探测单元、 该接收方时钟单元 的控制下接收并存储通过数据传输线传送的数据, 数据存储依据该接收 方时钟单元每个周期的半周期时的电平变化边沿进行触发, 并同歩将其 传送给该检错码解码模块;
该检错码解码模块用于检测接收到的分组数据是否存在错误, 在出 现错误时, 在每组出现错误的数据的最后一个数据比特存贮的时钟电平 变化边沿时刻将错误信息告知该接收状态探测单元和该错误重发使能 单元, 以在数据传输的后台使该错误重发使能单元同歩产生错误重发信 息并输出至该接收方逻辑与输入输出单元, 在无错误时将正确的分组数 据传送至该数据包重组模块;
该数据包重组模块用于将正确的分组数据重组恢复为该发送方的 原始数据。
9、 根据权利要求 8所述的基于使能信号线反馈实现检错重发的系 统, 其特征在于,
该数据发送使能信号检测单元用于检测该使能信号线的电平变化, 提供给该接收状态探测单元;
该接收状态探测单元用于依据来自该数据发送使能信号检测单元、 该检错码解码模块的综合信息实时判断该接收方所处的状态为停止、 起 始、 传输、 终止还是错误重发, 在正常接收和非接收状态时分别控制该 接收方时钟单元处于工作和停止状态;
该接收方时钟单元用于在正常接收状态时控制该数据接收寄存器 按照时钟频率采用半周期的电平边沿变化作为触发以接收数据比特, 并 在产生错误重发信息时控制该错误重发使能单元于出现错误的数据组 的最后一个数据比特接收时的半周期时钟电平变化边沿时刻发送错误 重发信息;
该错误重发使能单元用于在该检错码解码模块发现错误信息后, 在 该接收方时钟单元的时钟控制下通过该接收方逻辑与输入输出单元于 出现错误的数据组的最后一个数据比特接收时的半周期时钟电平变化 边沿时刻向该使能信号线发送错误重发信息。
10、 根据权利要求 1所述的基于使能信号线反馈实现检错重发的系 统, 其特征在于, 该使能信号线为双向传输线, 连接于发送方逻辑与输 入输出单元与接收方逻辑与输入输出单元之间, 利用其高低电平参量的 变化将错误重发信息由接收方传输给发送方, 在发送方逻辑与输入输出 单元与接收方逻辑与输入输出单元二者其中之一的输出为低电平时, 该 使能信号线的输出为低电平, 以使接收方将该错误重发信息传输给发送 方; 在发送方逻辑与输入输出单元与接收方逻辑与输入输出单元的输出 均为高电平时, 该使能信号线的输出为高电平, 数据传输正常。
11、 根据权利要求 10 所述的基于使能信号线反馈实现检错重发的 系统, 其特征在于, 在数据传输时, 该发送方利用该使能信号线发送数 据传输的停止、 起始、 传输和终止信息, 同时检测该接收方在该使能信 号线上发送的错误重发信息; 该接收方利用该使能信号线发送错误重发 信息, 同时检测该发送方在该使能信号线上发送数据传输的停止、起始、 传输和终止信息。
12、 根据权利要求 1所述的基于使能信号线反馈实现检错重发的系 统, 其特征在于, 该数据传输线为单向传输线, 连接于该数据发送寄存 器与该数据接收寄存器之间, 用于由该发送方向该接收方单向传输数 据。
13、 一种基于使能信号线反馈实现检错重发的方法, 应用于权利要 求 1至 12中任一项所述的系统, 其特征在于, 在数据传输时, 该方法 利用使能信号线上高低电平参量的变化将错误重发信息由接收方传输 给发送方, 在发送方逻辑与输入输出单元与接收方逻辑与输入输出单元 二者其中之一的输出为低电平时, 该使能信号线的输出为低电平, 以使 接收方将该错误重发信息传输给发送方。
14、 根据权利要求 13 所述的基于使能信号线反馈实现检错重发的 方法, 其特征在于, 所述利用使能信号线上高低电平参量的变化将错误 重发信息由接收方传输给发送方, 还包括:
在发送方逻辑与输入输出单元与接收方逻辑与输入输出单元的输 出均为高电平时, 该使能信号线的输出为高电平, 数据传输正常。
15、 根据权利要求 14所述的基于使能信号线反馈实现检错重发的 方法, 其特征在于, 该使能信号线为双向传输线, 所述利用使能信号线 上高低电平参量的变化将错误重发信息由接收方传输给发送方, 还包 括:
发送方利用该使能信号线发送数据传输的停止、 起始、 传输和终止 信息, 同时检测接收方在该使能信号线上发送的错误重发信息;
接收方利用该使能信号线发送错误重发信息, 同时检测发送方在该 使能信号线上发送数据传输的停止、 起始、 传输和终止信息。
16、 根据权利要求 15 所述的基于使能信号线反馈实现检错重发的 方法, 其特征在于, 所述在利用使能信号线上高低电平参量的变化将错 误重发信息由接收方传输给发送方的歩骤之前, 还包括:
数据包分组模块接收待传输数据, 并将该待传输数据分组后传输给 检错码编码模块;
检错码编码模块对分组后的待传输数据进行检错码编码, 并将编码 后的待传输数据传送至数据发送寄存器;
数据发送寄存器依次将编码后的待传输数据通过数据传输线传送 至数据接收寄存器; 数据接收寄存器接收通过数据传输线传送的数据, 并将其传送给该 检错码解码模块;
检错码解码模块检测接收到的分组数据是否存在错误, 在出现错误 时将错误信息告知该接收状态探测单元和该错误重发使能单元, 以产生 错误重发信息。
17、 根据权利要求 16所述的基于使能信号线反馈实现检错重发的 方法, 其特征在于, 所述检错码解码模块检测接收到的分组数据是否存 在错误的歩骤中, 如果没有出现错误, 则将正确的分组数据传送至该数 据包重组模块, 该数据包重组模块将正确的分组数据重组恢复为传送方 的原始数据。
PCT/CN2011/085141 2011-12-31 2011-12-31 基于使能信号线反馈实现检错重发的系统及方法 WO2013097220A1 (zh)

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CN1734966A (zh) * 2004-08-11 2006-02-15 华为技术有限公司 自动重传请求系统确认信息功率控制方法
WO2007000547A2 (fr) * 2005-06-01 2007-01-04 France Telecom Procede de correction d'erreurs de bruit impulsif sur une ligne sdsl
CN1967513A (zh) * 2005-11-18 2007-05-23 群康科技(深圳)有限公司 数据信号传输系统和数据信号传输方法
US20100046549A1 (en) * 2008-08-22 2010-02-25 Infineon Technologies Ag Channel Bonding and Packet Fragment Retransmission Method and Apparatus
CN102223207A (zh) * 2011-06-18 2011-10-19 安徽省菲特科技股份有限公司 一种基于rs帧结构的基带无损切换方法及装置

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CN1734966A (zh) * 2004-08-11 2006-02-15 华为技术有限公司 自动重传请求系统确认信息功率控制方法
WO2007000547A2 (fr) * 2005-06-01 2007-01-04 France Telecom Procede de correction d'erreurs de bruit impulsif sur une ligne sdsl
CN1967513A (zh) * 2005-11-18 2007-05-23 群康科技(深圳)有限公司 数据信号传输系统和数据信号传输方法
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