WO2019109239A1 - Procédé d'émission de données, dispositif d'extrémité d'émission et dispositif d'extrémité de réception - Google Patents

Procédé d'émission de données, dispositif d'extrémité d'émission et dispositif d'extrémité de réception Download PDF

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Publication number
WO2019109239A1
WO2019109239A1 PCT/CN2017/114573 CN2017114573W WO2019109239A1 WO 2019109239 A1 WO2019109239 A1 WO 2019109239A1 CN 2017114573 W CN2017114573 W CN 2017114573W WO 2019109239 A1 WO2019109239 A1 WO 2019109239A1
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WIPO (PCT)
Prior art keywords
edac
data
application layer
policy information
transmission
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PCT/CN2017/114573
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English (en)
Chinese (zh)
Inventor
邹景华
郁新华
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深圳市汇顶科技股份有限公司
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Application filed by 深圳市汇顶科技股份有限公司 filed Critical 深圳市汇顶科技股份有限公司
Priority to CN201780002019.1A priority Critical patent/CN110121850B/zh
Priority to PCT/CN2017/114573 priority patent/WO2019109239A1/fr
Publication of WO2019109239A1 publication Critical patent/WO2019109239A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems

Definitions

  • the present application relates to the field of communications, and more particularly, to a method of data transmission, a transmitting end device, and a receiving end device.
  • ARQ Automatic Repeat-reQuest
  • the use of the ARQ mechanism for data transmission has problems such as large data transmission delay, low data transmission throughput, and large system power consumption, especially when the environmental interference noise is large.
  • ARQ mechanism for data transmission how to ensure reliable transmission while reducing data transmission delay, increasing data transmission throughput and reducing system power consumption is an urgent problem to be solved.
  • the embodiment of the present application provides a data transmission method, a transmitting end device, and a receiving end device.
  • the transmitting end device uses an Error Detection and Correction (EDAC) policy information detecting application.
  • EDAC Error Detection and Correction
  • an embodiment of the present application provides a data transmission method, including:
  • the transmission data is sent to the receiving end device, so that the receiving end device detects and corrects errors and feedbacks of the application layer data during the transmission according to the EDAC policy information.
  • the method for data transmission uses an ARQ mechanism for data transmission.
  • the transmitting end device uses the EDAC policy information to detect errors in the transmission process of the application layer data and correct errors, and reduce data.
  • the number of retransmissions reduces data transmission delay, increases data transmission throughput, and reduces system power consumption.
  • the method before the generating the data, the method further includes:
  • EDAC indication information is added in the application layer data, and the EDAC indication information is used to indicate whether the EDAC policy information exists.
  • the receiving end device may determine, according to the EDAC indication information, whether to detect an error occurring in the transmission process of the application layer data according to the EDAC policy information and correct the error that occurs.
  • the adding the EDAC policy information in the application layer data includes:
  • the EDAC policy information is determined according to a Forward Error Correction (FEC) and a preset error correctable bit number, and the EDAC policy information is added in the application layer data.
  • FEC Forward Error Correction
  • the method before the EDAC policy information is added to the application layer data, the method further includes:
  • the Received Signal Strength Indicator (RSSI) of the received data in the first duration and the Packet Error Rate (PER) of the received data in the first duration are counted. analysis;
  • the RSSI of the received data in the first duration is less than the first threshold, and/or, if the PER of the received data in the first duration is greater than the second threshold, it is determined to use the EDAC policy information.
  • the method before the EDAC policy information is added to the application layer data, the method further includes:
  • Interleaving encodes a sequence of bits in the application layer data.
  • the EDAC policy information is used to detect errors in the transmission process of the application layer data and correct errors, and the interleaving code should be The bit sequence in the layer data is used, thereby reducing the number of data retransmissions, thereby reducing the data transmission delay, increasing the data transmission throughput rate, and reducing the system power consumption.
  • the method is applied to Bluetooth Low Energy (BLE) communication.
  • BLE Bluetooth Low Energy
  • an embodiment of the present application provides a data transmission method, including:
  • the method for data transmission uses an ARQ mechanism for data transmission.
  • the transmitting end device uses the EDAC policy information to detect an error occurring in the transmission process of the application layer data and correct the error that occurs, thereby Reduce the number of data retransmissions, which in turn reduces data transmission delay, increases data transmission throughput, and reduces system power consumption.
  • the transmission data further includes EDAC indication information, where the EDAC indication information is used to indicate whether the EDAC policy information is present.
  • the method further includes:
  • the receiving end device may determine, according to the EDAC indication information, whether to detect an error occurring in the transmission process of the transmission data according to the EDAC policy information and correct the error that occurs.
  • the error that occurs in the transmission process of the application layer data is detected and corrected according to the EDAC policy information, including:
  • the feedback to the transmitting device according to the result of the detection and correction includes:
  • NACK non-acknowledgement
  • an acknowledgment frame (ACK) is sent to the transmitting device, and the ACK is used to indicate that the transmission data is successfully received.
  • ACK acknowledgment frame
  • the method before detecting, according to the EDAC policy information, an error that occurs during the transmission of the application layer data, the method further includes:
  • the step of detecting and correcting the application layer data is entered.
  • the method further includes:
  • the step of feeding back to the transmitting device based on the result of the detection and correction is entered.
  • the method further includes:
  • the transmission data is deinterleaved.
  • the transmission data is deinterleaved.
  • the number of data retransmissions is further reduced, thereby reducing the data transmission delay, increasing the data transmission throughput rate, and reducing the system power consumption.
  • the method is applied to BLE communication.
  • the embodiment of the present application provides a transmitting end device, which can execute the module or unit of the method in the first aspect or any optional implementation manner of the first aspect.
  • the embodiment of the present application provides a receiving end device, which can execute the module or unit of the method in the second aspect or any optional implementation manner of the second aspect.
  • a transmitter device comprising a processor, a memory, and a communication interface.
  • the processor is coupled to the memory and communication interface.
  • the memory is for storing instructions for the processor to execute, and the communication interface is for communicating with other network elements under the control of the processor.
  • the processor executes the instructions stored by the memory, the execution causes the processor to perform the method of the first aspect or any of the possible implementations of the first aspect.
  • a receiving end device comprising a processor, a memory, and a communication interface.
  • the processor is coupled to the memory and communication interface.
  • the memory is for storing instructions for the processor to execute, and the communication interface is for communicating with other network elements under the control of the processor.
  • the processor executes the instructions stored by the memory, the execution causes the processor to perform the method of any of the possible implementations of the second aspect or the second aspect.
  • a computer storage medium storing program code for instructing a computer to perform the method of any of the first aspect or the first aspect of the first aspect. instruction.
  • a computer storage medium storing program code for instructing a computer to perform the method in any one of the possible implementation manners of the second aspect or the second aspect instruction.
  • a computer program product comprising instructions, when executed on a computer, causes the computer to perform the methods described in the various aspects above.
  • FIG. 1 shows a wireless communication system to which the embodiment of the present application is applied.
  • FIG. 2 shows another wireless communication system to which the embodiment of the present application is applied.
  • FIG. 3 is a system block diagram of a BLE wireless connection in the embodiment of the present application.
  • Figure 4 is a schematic diagram showing the structure of a BLE user air interface data packet.
  • FIG. 5 is a schematic flowchart of a method for data transmission according to an embodiment of the present application.
  • FIG. 6 is a schematic flowchart of determining whether to enable the EDAC mechanism according to an embodiment of the present application.
  • FIG. 7 is a schematic diagram of an EDAC policy information carrying manner according to an embodiment of the present application.
  • FIG. 8 is a schematic diagram of another EDAC policy information bearer according to an embodiment of the present application.
  • FIG. 9 is a schematic diagram of a method of data transmission according to an embodiment of the present application.
  • FIG. 10 is a schematic flowchart of another method for data transmission according to an embodiment of the present application.
  • FIG. 11 is a schematic diagram of another method of data transmission according to an embodiment of the present application.
  • FIG. 12 is a schematic block diagram of a transmitting end device according to an embodiment of the present application.
  • FIG. 13 is a schematic block diagram of a receiving end device according to an embodiment of the present application.
  • FIG. 14 is a schematic block diagram of an apparatus for data transmission provided by an embodiment of the present application.
  • FIG. 15 is a schematic structural diagram of a system chip according to an embodiment of the present application.
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • UMTS Universal Mobile Telecommunication System
  • WiMAX Worldwide Interoperability for Microwave Access
  • the embodiment of the present application may be applied to communication between a terminal device and a network device (for example, a base station), for example, the terminal device sends data to the network device by using an uplink (UL), or the network device passes the network device.
  • the downlink (DL) transmits data to the terminal device.
  • FIG. 1 shows an application scenario applied by an embodiment of the present application, which may be a wireless communication system 100.
  • the wireless communication system 100 can include a network device 110.
  • Network device 110 may be a device that communicates with a terminal device.
  • the network device 110 can provide communication coverage for a particular geographic area and can communicate with terminal devices, such as User Equipment (UE), located within the coverage area.
  • UE User Equipment
  • the network device 110 may be a base station (Base Transceiver Station, BTS) in a GSM system or a CDMA system, or may be a base station (NodeB, NB) in a WCDMA system, or may be an evolved base station in an LTE system.
  • BTS Base Transceiver Station
  • NodeB NodeB
  • the network device can be a relay station, an access point, an in-vehicle device, a wearable device, A network side device in a future 5G network or a network device in a publicly available Public Land Mobile Network (PLMN) in the future.
  • PLMN Public Land Mobile Network
  • the wireless communication system 100 also includes at least one terminal device 120 located within the coverage of the network device 110.
  • Terminal device 120 can be mobile or fixed.
  • the terminal device 120 may refer to an access terminal, a user equipment (UE), a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, and a user. Agent or user device.
  • UE user equipment
  • the access terminal can be a cellular phone, a cordless phone, a session initiation protocol (Session) Initiation Protocol (SIP) phone, Wireless Local Loop (WLL) station, Personal Digital Assistant (PDA), handheld device with wireless communication capabilities, computing device or other processing device connected to the wireless modem , in-vehicle devices, wearable devices, terminal devices in future 5G networks, or terminal devices in future evolved PLMNs.
  • Session Session
  • SIP Session Initiation Protocol
  • WLL Wireless Local Loop
  • PDA Personal Digital Assistant
  • FIG. 1 exemplarily shows one network device and two terminal devices.
  • the wireless communication system 100 may include a plurality of network devices and may include other numbers of terminal devices within the coverage of each network device. The application embodiment does not limit this.
  • the wireless communication system 100 may further include other network entities, such as a network controller, a mobility management entity, and the like.
  • network entities such as a network controller, a mobility management entity, and the like.
  • D2D device-to-device
  • BLE Bluetooth Low Energy
  • V2V Vehicle to Vehicle
  • V2X Vehicle to Everything
  • the embodiment of the present application can be applied to communication between the terminal device and the terminal device.
  • the terminal device and the terminal device directly communicate through a side link (Sidelink, SL).
  • Sidelink Sidelink
  • FIG. 2 is a schematic diagram of another application scenario of the embodiment of the present application, which may be a wireless communication system 200.
  • the wireless communication system 200 includes a terminal device 10 and a terminal device 20, and the terminal device 10 and the terminal device 20 can communicate by a D2D communication mode (for example, BLE).
  • a D2D communication mode for example, BLE
  • the terminal device 10 and The terminal device 20 directly communicates through a D2D link, that is, a side line link (SL).
  • SL side line link
  • the terminal device 10 or the terminal device 20 may be a terminal device capable of implementing D2D communication.
  • it may be an in-vehicle terminal device, and may also refer to an access terminal, a user equipment (UE), a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, and a wireless communication device.
  • UE user equipment
  • subscriber unit a subscriber station
  • mobile station a mobile station
  • a remote station a remote terminal
  • a mobile device a user terminal, a terminal, and a wireless communication device.
  • user agent or user device may be a terminal device capable of implementing D2D communication.
  • the access terminal can be a cellular telephone, a cordless telephone, a Session Initiation Protocol (SIP) telephone, a wireless local loop (WLL) station, a personal digital processing (PDA), a handheld device with wireless communication capabilities, a computing device, or a connection to a wireless modem.
  • SIP Session Initiation Protocol
  • WLL wireless local loop
  • PDA personal digital processing
  • the embodiment of the present application is not limited to the other processing device, the wearable device, the terminal device in the future 5G network, or the terminal device in the future evolved PLMN.
  • FIG. 3 is a system block diagram of a terminal device (eg, an Android phone) and a BLE device in a BLE wireless connection.
  • a terminal device eg, an Android phone
  • the BLE controller subsystem is generally an all-in-one chip. It usually integrates Wireless Fidelity (WIFI)/Global Positioning System (GPS)/Frequency Modulation (FM). Radio frequency (RF), running the BLE control subsystem firmware in the chip, handling the controller's business logic, and interacting with the host controller interface (HCI) and the host (Host) .
  • WIFI Wireless Fidelity
  • GPS Global Positioning System
  • FM Frequency Modulation
  • RF Radio frequency
  • the BLE main stack (Host Stack) runs on the access point (AP).
  • AP access point
  • the protocol stack in the Android system covers HCI-HOST, logical link control and adaptation protocol (Logical Link Control and Adaptation). Protocol, L2CAP, Service Model (SM), Attribute Protocol (ATT) for discovering, reading, and writing peer devices, and Generic Access Profile (GAP) protocol stack.
  • HCI-HOST logical link control and adaptation protocol
  • SM Service Model
  • ATT Attribute Protocol
  • GAP Generic Access Profile
  • the User Application Program (User Application) is a Bluetooth application developed by the user for data transfer between different Bluetooth devices.
  • the BLE device is usually composed of a BLE integrated circuit (SOC) and other peripheral components.
  • SOC BLE integrated circuit
  • the BLE SOC chip it consists of RF, Controller, Host and User App.
  • the embodiments of the present application may be applied to a system block diagram in the BLE wireless connection as shown in FIG. 3.
  • Figure 4 is a schematic diagram showing the structure of a BLE user air interface data packet.
  • APP Data refers to application data of a user application, which is related to a specific service and is provided by an application layer.
  • the main data packet (Host Packet) is based on the APP Data, and is composed of an ATT header and an L2CAP header. If the data signature function is enabled, the signature data needs to be added.
  • the stack is responsible for the package.
  • Control Packet (Controller Packet) is based on the Host Packet and adds a Link Layer Header (LL Header). If link encryption is enabled, the primary data packet needs to be encrypted and added. Message Identification Code (MIC).
  • MIC Message Identification Code
  • the Air Packet is composed of a Preamble, an Access Address, and a Cyclic Redundancy Check (CRC) based on the Controller Packet.
  • the CRC is used to calculate the Controller Packet part. Get, receive the air interface packet When the CRC check is made, it can be found whether there is a bit error in the data transmission and reception process.
  • the first data in the embodiment of the present application may be the application layer data as shown in FIG. 4, and the EDAC policy information in the embodiment of the present application may be carried in a field on a Service Data Unit (SDU) of the application layer data.
  • SDU Service Data Unit
  • FIG. 5 is a schematic flowchart of a method 300 for data transmission according to an embodiment of the present application.
  • the method 300 may be performed by a transmitting device, which may be the network device 110 or the terminal device 120 as shown in FIG. 1, or the terminal device 10 as shown in FIG.
  • the terminal device 20, the receiving device in the method 300 may be the terminal device 120 or the network device 110 as shown in FIG. 1 , or the terminal device 20 or the terminal device 10 as shown in FIG. 2
  • the method 300 includes The following content.
  • the EDAC policy information is used to detect errors in the application layer data during transmission and to correct errors that occur.
  • the EDAC policy information can be implemented based on Error Checking And Correcting (ECC).
  • the EDAC policy information may be determined according to the FEC algorithm and a preset error correctable number of bits.
  • the preset number of correctable bits refers to the number of bits that the EDAC policy information can correct.
  • one type of EDAC policy information can detect 2 bit errors and correct 1 bit error in 512 bits of data. At this time, the preset error correctable number of bits is 1 bit.
  • EDAC indication information (eg, EDAC Flag) is added to the transmission data.
  • the EDAC indication information is carried in a field before the application layer data
  • the EDAC policy information is carried in a field after the application layer data.
  • the EDAC indication information is carried in a field before the application layer data
  • the EDAC policy information is carried in a field in the application layer data.
  • the EDAC indication information may indicate whether the EDAC policy information is present.
  • the EDAC indication information may be a flag bit, and the flag bit may be 0 or 1.
  • the ODAC policy information may be used to indicate that the application layer data is incorrectly transmitted during transmission. And to correct the error, you can use 1 to indicate that the EDAC policy information is not used to detect the error of the application layer data during transmission and correct the error.
  • whether the EDAC policy information is used to detect an error occurring in the transmission process of the application layer data and correct the error that occurs may be determined according to the current communication environment.
  • electromagnetic interference e.g., interference generated when the same frequency electromagnetic signal is transmitted
  • multiple bits in the application layer data may be erroneous during transmission.
  • the transmitting device performs statistical analysis on the RSSI of the received data in the first duration and the PER of the received data in the first duration.
  • the transmitting end device statistically analyzes the RSSI of receiving data in the first time period and the PER of the received data in the first time period, and may be the RSSI of receiving data and the PER of the received data when communicating with the receiving end device, or may be Is the RSSI of the received data and the PER of the received data when communicating with other devices.
  • the RSSI of the received data in the first duration is less than the first threshold, and/or, if the PER of the received data in the first duration is greater than the second threshold, determining to use the EDAC policy information to detect the application layer data in the transmission process Errors in the corrections and corrections.
  • the RSSI of the received data in the first duration is greater than or equal to the first threshold, and/or, if the PER of the received data in the first duration is less than or equal to the second threshold, determining to not use the EDAC policy information to detect the application Layer data errors during transmission and correction of errors.
  • the transmitting device acquires data; in 61, the transmitting device performs a CRC check after acquiring the data; in 62, the transmitting device counts the current communication within the first time period. Environmental quality; in 63, the transmitting device judges that the EDAC mechanism is enabled; in 64, the transmitting device determines that the EDAC mechanism is not enabled.
  • the transmitting device if the RSSI of the received data in the first duration is less than the first threshold, and/or, if the PER of the received data in the first duration is greater than the second threshold, the transmitting device is considered to be currently located.
  • the environment is a strong signal environment, and the PER is high, there is strong interference, or the current environment of the transmitting device is considered to be a weak signal environment, close to the receiving sensitivity limit.
  • EDAC mechanism is enabled to improve the transmission bandwidth of effective application data and reduce the delay of data transmission.
  • the current environment of the transmitting device is considered to be compared. Clean, the EDAC mechanism is disabled, saving transmission bandwidth.
  • the method 300 further includes:
  • Interleaving encodes a sequence of bits in the application layer data.
  • interleaving coding can reduce the influence of the erroneous bits generated by the application layer data during the transmission process on the identification of the application layer data.
  • the data of the 11th-15th bit is incorrect during the transmission, resulting in 100-bit data being unrecognizable.
  • the 11th-15th data is evenly distributed over 100 bits.
  • the data of the 11th bit is distributed in the 1st-20th
  • the data of the 12th bit is distributed in the 21st-40th
  • the data of the 13th bit is distributed in the 41st to 60th
  • the data distribution of the 14th bit In the 61st-80th, the 15th bit of data is distributed in the 81st-100th, so that there is a 1-bit error in every 20 bits, which does not affect the overall identification of 100-bit data.
  • the application layer data sent by the transmitting device can be verified by using a CRC.
  • the method 300 of data transmission uses an ARQ mechanism for data transmission.
  • the receiving end device feeds back ACK when receiving data normally; when receiving data fails, the receiving end device feeds back NACK to request the transmitting end device to perform data retransmission.
  • the transmitting end device uses the EDAC policy information to detect errors in the transmission process of the application layer data and correct errors, and reduce data.
  • the number of retransmissions reduces data transmission delay, increases data transmission throughput, and reduces system power consumption.
  • determining to use the EDAC policy information to detect application layer data during transmission The current error and correcting the error, and interleaving the bit sequence in the encoded application layer data, thereby reducing the number of data retransmissions, thereby reducing the data transmission delay, increasing the data transmission throughput rate, and reducing the system function. Consumption.
  • method 400 is illustrated in FIG.
  • the method 400 includes:
  • the transmitting device acquires application layer data.
  • the transmitting end device may be a terminal device (for example, an Android mobile phone) that supports BLE communication.
  • a terminal device for example, an Android mobile phone
  • the application layer data is APP data in a BLE user air interface data packet structure.
  • the transmitting device determines to allow EDAC.
  • the transmitting device can determine whether to allow EDAC according to the environment in which it is currently located.
  • the RSSI of the received data in the first duration is less than the first threshold, and/or, if the PER of the received data in the first duration is greater than the second threshold, it is determined that the application layer data is detected by using the EDAC policy information. Errors that occur during transmission and correct errors that occur.
  • the transmitting device determines that EDAC is not allowed.
  • the information detects errors in the application layer data during transmission and corrects errors that occur.
  • the transmitting end device interleaves the application layer data.
  • the transmitting device adds EDAC policy information to the application layer data.
  • a field carrying the EDAC policy information is added to the application layer data.
  • the EDAC policy information is used to detect errors in the application layer data during transmission and to correct errors that occur.
  • the EDAC policy information may be determined according to an FEC algorithm and a preset error correctable number of bits.
  • EDAC indication information is added in the application layer data, where the EDAC indication information is used to indicate whether the EDAC policy information exists.
  • a field carrying EDAC indication information is added to the application layer data.
  • the transmitting device sends the application layer data.
  • the transmitting device performs step 440, step 450, and when determining that the EDAC is allowed.
  • Step 460 the transmitting device performs step 460 when it is determined that the EDAC is not allowed.
  • the EDAC mechanism can be dynamically determined.
  • the above method 400 only needs to add corresponding processing in the Bluetooth application, and does not need to modify the Bluetooth protocol stack, and has high implementation technical feasibility on the mobile phone side.
  • the transmitting device determines to use the EDAC policy information to detect errors in the transmission process of the application layer data and correct errors caused by the current communication environment, thereby reducing the number of data retransmissions. In turn, the data transmission delay is reduced, the data transmission throughput rate is increased, and the system power consumption is reduced.
  • FIG. 10 is a schematic flowchart of a method 500 for data transmission according to an embodiment of the present application.
  • the method 500 is performed by a receiving end device, which may be the network device 110 or the terminal device 120 as shown in FIG. 1, or may be the terminal device 10 or the terminal as shown in FIG.
  • the device 20, the transmitting device in the method 500 may be the terminal device 120 or the network device 110 as shown in FIG. 1, or the terminal device 20 or the terminal device 10 as shown in FIG. 2, the method 500 includes the following content.
  • the EDAC policy information is used to detect errors in the application layer data during transmission and to correct errors that occur.
  • the transmission data further includes EDAC indication information, where the EDAC indication information is used to indicate whether the EDAC policy information is present.
  • the method also includes before the application layer data is detected and corrected according to the EDAC policy information. include:
  • step 520 in the method 500 may specifically be:
  • the accumulated error bit of the application layer data after error correction is detected.
  • Step 530 in the method 500 may specifically be:
  • an ACK is sent to the transmitting device, and the ACK is used to indicate that the transmission data is successfully received.
  • the method 500 further includes:
  • step 520 the step of detecting and correcting the application layer data is entered (ie, step 520).
  • the method 500 further includes:
  • step 530 the step of feeding back to the transmitting device based on the result of the detection and correction is entered (ie, step 530).
  • the receiving end device detects and corrects an error occurring in the transmission process of the application layer data according to the EDAC policy information, detecting the accumulated error bit number in the application layer data.
  • the receiving end device sends a NACK to the transmitting end device, where the NACK is used to indicate that the transmission data is not successfully received.
  • the receiving end device sends an ACK to the transmitting end device, where the ACK is used to indicate that the transmission data is successfully received.
  • the second CRC checks that the transmission data is successful, and the receiving end device sends an ACK to the transmitting end device, where the ACK is used to indicate that the transmission data is successfully received.
  • the receiving end device has a certain error tolerance to the received data. For example, in 512-bit data, there are 2 bit errors allowed, and after FEC error correction, when the accumulated error bits are counted Within the error tolerance of the receiving device, the data is considered to be received correctly.
  • the method 500 further includes:
  • the transmission data is deinterleaved.
  • the method 500 is applied to BLE communication.
  • the method 500 described above can be implemented by dedicated Bluetooth chip hardware.
  • steps in the method 500 of data transmission may refer to the description of the corresponding steps in the method 300 of data transmission, and are not described herein for brevity.
  • the EDAC policy information is used to detect the application layer data in the transmission data during the transmission process. Errors occur and correct errors, thereby reducing the number of data retransmissions, thereby reducing data transmission delay, increasing data transmission throughput, and reducing system power consumption.
  • the transmission data is deinterleaved, thereby further reducing the number of data retransmissions.
  • the method 600 includes:
  • the receiving end device receives application layer data from the transmitting end device.
  • the transmitting device may be a terminal device (for example, an Android mobile phone) that supports BLE communication.
  • the sink device can be a BLE device (eg, a smart bracelet).
  • the application layer data is application layer data in a BLE user air interface packet structure.
  • the receiving end device performs a first CRC check on the received application layer data.
  • step 603 when the first CRC check is successful, step 603 is performed.
  • step 604 is performed.
  • the receiving end device sends an ACK to the transmitting end device.
  • the receiving end device sends an ACK to the transmitting end device, and is used to indicate that the data sent by the transmitting end device is successfully received.
  • the receiving end device determines whether to use the EDAC mechanism.
  • the receiving end device may determine whether to use the EDAC mechanism by using the EDAC indication information included in the application layer data.
  • the EDAC indication information included in the application layer data indicates the presence of EDAC policy information, it is determined to use the EDAC mechanism.
  • step 605 when it is determined that the EDAC mechanism is used, step 605 is performed.
  • step 606 is performed.
  • the receiving end device performs error correction according to the EDAC and calculates the accumulated error bit number.
  • the receiving device detects the error of the application layer data during the transmission and corrects the error according to the EDAC policy information.
  • the application layer data contains EDAC policy information.
  • the EDAC policy information is determined according to the FEC algorithm and the preset number of correctable bits.
  • the receiving device can calculate the cumulative number of error bits after performing EDAC error correction.
  • the receiving end device sends a NACK to the transmitting end device.
  • the receiving end device sends a NACK to the transmitting end device, and is used to indicate that the data sent by the transmitting end device is not successfully received.
  • the receiving end device After EDAC error correction, the receiving end device performs a second CRC check.
  • step 610 is performed.
  • step 609 may be performed first, and then step 610 is performed.
  • step 608 is performed.
  • step 610 is performed.
  • step 609 may be performed first, and then step 610 is performed.
  • step 606 is performed.
  • the receiving end device performs deinterleaving processing on data that the CRC check succeeds or the CRC check fails but the number of error bits is less than the third threshold.
  • the receiving end device sends an ACK to the transmitting end device.
  • the receiving end device reports data to the host.
  • the receiving end device requests the transmitting end device to retransmit the data.
  • the BLE data transmission and reception in a noisy environment provides a set of effective error correction methods, improves the system transmission bandwidth in the application environment, and is compatible with the Bluetooth protocol stack of the existing mobile phone, and can be used in the BLE wireless data. Applications in areas such as transmission.
  • FIG. 12 is a schematic block diagram of a transmitting end device 700 according to an embodiment of the present application. As shown in FIG. 12, the transmitting device 700 includes:
  • the processing unit 710 is configured to acquire application layer data.
  • the processing unit 710 is further configured to add error detection and correction EDAC policy information to the application layer data to generate transmission data.
  • the sending unit 720 is configured to send the transmission data to the receiving end device, so that the receiving end device detects and corrects an error and feedback of the application layer data during the transmission according to the EDAC policy information.
  • the processing unit 710 is further configured to add EDAC indication information to the application layer data, where the EDAC indication information is used to indicate whether the EDAC policy information is present.
  • processing unit 710 is specifically configured to:
  • the EDAC policy information is determined according to the forward error correction FEC algorithm and the preset error correctable bit number, and the EDAC policy information is added in the application layer data.
  • the processing unit 710 before the processing unit 710 adds the EDAC policy information to the application layer data, the processing unit 710 is further configured to:
  • the RSSI of the received data in the first duration is less than the first threshold, and/or, if the PER of the received data in the first duration is greater than the second threshold, it is determined to use the EDAC policy information.
  • the processing unit 710 before the processing unit 710 adds the EDAC policy information in the application layer data, the processing unit 710 is further configured to interleave the bit sequence in the application layer data.
  • the transmitting device 700 may correspond to the transmitting device in the method 300 of the present application, and the foregoing and other operations and/or functions of the respective units in the transmitting device 700 are respectively implemented in FIG. The corresponding process of the transmitting device in the method 300 is not repeated here for brevity.
  • FIG. 13 is a schematic block diagram of a sink device 800 in accordance with an embodiment of the present application. As shown in FIG. 13, the receiving device 800 includes:
  • the receiving unit 810 is configured to receive transmission data sent by the transmitting end device, where the transmission data includes application layer data including error detection and correction EDAC policy information;
  • the processing unit 820 is configured to detect and correct an error that occurs in the transmission process of the application layer data according to the EDAC policy information.
  • the processing unit 820 is further configured to feed back to the transmitting device according to the result of the detecting and correcting.
  • the transmission data further includes EDAC indication information, where the EDAC indication information is used to indicate whether the EDAC policy information exists;
  • the processing unit 820 is further configured to determine, according to the EDAC indication information, that the EDAC policy information exists according to the EDAC indication information, before the processing unit 820 detects and corrects an error that occurs in the transmission of the application layer data according to the EDAC policy information.
  • processing unit 820 is specifically configured to:
  • an ACK is sent to the transmitting device, and the ACK is used to indicate that the transmission data is successfully received.
  • the processing unit 820 is further configured to: before detecting, according to the EDAC policy information, an error that occurs in the transmission process of the application layer data, the processing unit 820 is further configured to:
  • the step of detecting and correcting the application layer data is entered.
  • the processing unit 820 detects and corrects an error that occurs in the transmission process of the application layer data according to the EDAC policy information, the processing unit 820 is further configured to:
  • the step of feeding back to the transmitting device based on the result of the detection and correction is entered.
  • the processing unit 820 is further configured to perform deinterleaving processing on the transmission data.
  • the receiving end device 800 may correspond to the receiving end device in the method 500 of the present application, and the above and other operations and/or functions of the respective units in the receiving end device 800 are respectively implemented in order to implement FIG.
  • the corresponding process of the receiving device in the method 500 is not repeated here for brevity.
  • FIG. 14 is a schematic block diagram of a device 900 for data transmission provided by an embodiment of the present application, where the device 900 includes:
  • a memory 910 configured to store a program, where the program includes a code
  • transceiver 920 configured to communicate with other devices
  • the processor 930 is configured to execute program code in the memory 910.
  • the transceiver 920 is configured to perform specific signal transceiving under the driving of the processor 930.
  • the processor 930 may implement the method 300 in FIG. 5 or implement the operations performed by the transmitting device in the method 400 in FIG. 9.
  • the processor 930 may implement the method 300 in FIG. 5 or implement the operations performed by the transmitting device in the method 400 in FIG. 9.
  • the processor 930 can also implement the method 500 in FIG. 10 or implement the operations performed by the receiving device in the method 600 in FIG. 11.
  • the processor 930 can also implement the method 500 in FIG. 10 or implement the operations performed by the receiving device in the method 600 in FIG. 11.
  • the processor 930 may be a central processing unit (CPU), and the processor 930 may also be other general-purpose processors, digital signal processors (DSPs), and application specific integrated circuits. (ASIC), off-the-shelf programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and more.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the memory 910 can include read only memory and random access memory and provides instructions and data to the processor 930. A portion of the memory 910 may also include a non-volatile random access memory. For example, the memory 910 can also store information of the device type.
  • the transceiver 920 can be used to implement signal transmission and reception functions, such as frequency modulation and demodulation functions or upconversion and down conversion functions.
  • the device 900 for data transmission can be a chip or a chipset.
  • the steps of the method disclosed in the embodiments of the present application may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor.
  • the software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in the memory, and the processor 930 reads the information in the memory and completes the steps of the above method in combination with the hardware thereof. To avoid repetition, it will not be described in detail here.
  • FIG. 15 is a schematic structural diagram of a system chip 1000 according to an embodiment of the present application.
  • the system chip 1000 of FIG. 15 includes an input interface 1001, an output interface 1002, a processor 1003, and a memory 1004 that can be connected by an internal communication connection line.
  • the processor 1003 is configured to execute code in the memory 1004.
  • the processor 1003 when the code is executed, the processor 1003 implements a method performed by the transmitting device in the method embodiment. For the sake of brevity, it will not be repeated here.
  • the processor 1003 when the code is executed, the processor 1003 implements a method performed by the receiving device in the method embodiment. For the sake of brevity, it will not be repeated here.
  • the disclosed systems, devices, and methods may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the functions may be stored in a computer readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product.
  • the technical solution of the present application which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium, including Several instructions are used to make a computer device (which can be a personal computer, a server, Either a network device or the like) performs all or part of the steps of the method described in the various embodiments of the present application.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)

Abstract

La présente invention concerne un procédé d'émission de données, un dispositif d'extrémité d'émission et un dispositif d'extrémité de réception. Lorsqu'un mécanisme ARQ est utilisé pour mettre en œuvre une émission de données, un dispositif d'extrémité d'émission détermine, en fonction de l'environnement de communication actuel, d'utiliser des informations de politique EDAC pour détecter une erreur se produisant pendant un processus d'émission de données et pour corriger l'erreur qui s'est produite, ce qui permet de réduire le nombre de ré-émissions de données. Ainsi, les retards d'émission de données sont réduits, le débit d'émission de données est augmenté, et la consommation d'énergie du système est réduite. Le procédé comprend les étapes consistant : à acquérir des données de couche d'application ; à ajouter des informations de politique EDAC aux données de couche d'application de façon à générer des données d'émission ; et à envoyer les données d'émission à un dispositif d'extrémité de réception, de sorte que le dispositif d'extrémité de réception détecte et corrige, en fonction des informations de politique EDAC, une erreur se produisant pendant un processus d'émission des données de couche d'application et renvoie ladite erreur.
PCT/CN2017/114573 2017-12-05 2017-12-05 Procédé d'émission de données, dispositif d'extrémité d'émission et dispositif d'extrémité de réception WO2019109239A1 (fr)

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PCT/CN2017/114573 WO2019109239A1 (fr) 2017-12-05 2017-12-05 Procédé d'émission de données, dispositif d'extrémité d'émission et dispositif d'extrémité de réception

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