WO2015168873A1 - Dispositif d'envoi, dispositif de réception, et procédé et système de communication sans fil - Google Patents

Dispositif d'envoi, dispositif de réception, et procédé et système de communication sans fil Download PDF

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Publication number
WO2015168873A1
WO2015168873A1 PCT/CN2014/076927 CN2014076927W WO2015168873A1 WO 2015168873 A1 WO2015168873 A1 WO 2015168873A1 CN 2014076927 W CN2014076927 W CN 2014076927W WO 2015168873 A1 WO2015168873 A1 WO 2015168873A1
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WO
WIPO (PCT)
Prior art keywords
data packet
information
scheduling signaling
scrambling sequence
retransmissions
Prior art date
Application number
PCT/CN2014/076927
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English (en)
Chinese (zh)
Inventor
黎超
张兴炜
武雨春
Original Assignee
华为技术有限公司
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Filing date
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2014/076927 priority Critical patent/WO2015168873A1/fr
Priority to CN201480078387.0A priority patent/CN106233648B/zh
Publication of WO2015168873A1 publication Critical patent/WO2015168873A1/fr

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Classifications

    • 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

Definitions

  • the present invention relates to the field of wireless communications, and in particular, to a transmitting device, a receiving device, a wireless communication method, and a system. Background technique
  • a receiving device can simultaneously receive signals sent by multiple sending devices. For example, in a D2D (Device to Device) device, a D2D receiving device can simultaneously receive multiple D2D transmitting devices and send them through broadcast. Message.
  • D2D Device to Device
  • the sending device sends the scheduling signaling of the data through the control channel, and sends the service data or the further control information through the data channel, where the scheduling signaling can be used to indicate the time-frequency location where the service data is located and The modulation coding method used.
  • the receiving device decodes the data packet to obtain scheduling signaling, and after determining, according to the content of the scheduling signaling, that the sending device that sends the scheduling signaling is a device that communicates with the device, The data packet of the service data is received according to the time-frequency position indicated by the scheduling signaling and the modulation and coding method.
  • the inventors have found that the prior art has at least the following problems:
  • the receiving device When the receiving device simultaneously receives signals transmitted by a plurality of transmitting devices, and the receiving device only communicates with one or a part of the transmitting devices, The receiving device needs to decode each received data packet containing scheduling signaling and receive the data packet of the service data according to the content of the scheduling signaling.
  • the decoding process has high computational complexity and needs to consume more processing resources. Affect the communication efficiency of the system. Summary of the invention
  • the embodiment of the present invention provides a sending device. , receiving device, wireless communication method and system.
  • the technical solution is as follows:
  • a sending device where the sending device includes:
  • a sequence determining module configured to determine a corresponding scrambling sequence according to a communication parameter of the information to be sent;
  • a scrambling module configured to perform a cyclic redundancy check corresponding to the to-be-sent information according to the scrambling sequence
  • the CRC bit is scrambled to generate a scrambled CRC bit;
  • a data packet generating module configured to generate a data packet of the to-be-sent information, where the data packet includes the scrambled CRC bit;
  • a sending module configured to send the data packet to a receiving device, where the receiving device parses the scrambling sequence according to the received scrambled CRC bit, and determines the communication according to the scrambling sequence And receiving, according to the communication parameter, each data packet sent by the sending device;
  • the communication parameter is used to indicate retransmission information, a synchronization signal corresponding to the sending device, or identification information of the data packet.
  • the sequence determining module is configured to: when the information to be sent is scheduling signaling, and the communication parameter is used to indicate retransmission information, according to the first retransmission The information determines the scrambling sequence, wherein the first retransmission information is used to indicate whether the data packet is a retransmission data packet.
  • the sequence determining module includes:
  • a first sequence obtaining unit configured to acquire a scrambling sequence of the data packet of the previous scheduling signaling sent by the sending device
  • a first determining unit configured to: when the first retransmission information indicates that the data packet is a retransmission data packet, determine that the scrambling sequence is a scrambling sequence of a data packet of the previous scheduling signaling;
  • a second determining unit configured to: when the first retransmission information indicates that the data packet is not a retransmission data packet, determine that the scrambling sequence is a scrambling sequence of a data packet of the previous scheduling signaling Another scrambling sequence that differs.
  • the sequence determining module is configured to: when the information to be sent is scheduling signaling, and the communication parameter is used to indicate retransmission information, according to the second retransmission Determining, by the information, the adding sequence, wherein the second retransmission information is used to indicate the number of retransmissions of the data packet;
  • the sequence determining module includes: a third determining unit, configured to: when the information to be sent is scheduling signaling, where the communications parameter is used to indicate retransmission information, And when the number of retransmissions of the data packet is the same as the number of retransmissions of the data packet of the next scheduling signaling, determining the scrambling sequence according to the third retransmission information, where the third retransmission information is used. Indicating the number of retransmissions of the data packet;
  • a fourth determining unit configured to: when the to-be-sent information is scheduling signaling, where the communication parameter is used to indicate retransmission information, and the retransmission of the data packet and the retransmission of the data packet of the next scheduling signaling When the number of times is different, the scrambling sequence is determined according to the fourth retransmission information, where the fourth retransmission information is used to indicate the number of retransmissions of the data packet of the next scheduling signaling.
  • the sequence determining module is configured to: when the information to be sent is scheduling signaling, and the communication parameter is used to indicate retransmission information, according to the fifth retransmission Determining the scrambling sequence; the fifth retransmission information is used to indicate the number of retransmissions of data packets of each service data corresponding to the scheduling signaling, or the fifth retransmission information is used to indicate the The number of retransmissions of the first data packet in the data packet of each service data corresponding to the scheduling signaling; and the fifth retransmission information is used to indicate the number of retransmissions of the data packet of each service data corresponding to the scheduling signaling The number of retransmissions of data packets of each service data corresponding to the scheduling signaling is the same.
  • the sequence determining module is configured to: when the information to be sent is service data, and the communication parameter is used to indicate retransmission information, according to the sixth retransmission information Determining the added sequence, wherein the sixth retransmission information is used to indicate the number of retransmissions of the data packet;
  • the number of retransmissions of data packets of different service data between data packets of two adjacent scheduling signalings is the same.
  • the sequence determining module is configured to: when the information to be sent is service data, and the communication parameter is used to indicate retransmission information, according to the seventh retransmission information Determining the scrambling sequence, wherein the seventh retransmission information is used to indicate a number of retransmissions of the data packet of the at least one service data after the data packet.
  • the sequence determining module is configured to determine, according to the identifier of the synchronization signal corresponding to the sending device, the scrambling sequence when the information to be sent is scheduling signaling .
  • the sequence determining module is configured to perform, according to the identifier of the synchronization signal, and the identifier of the synchronization signal that is preset The correspondence between the scrambling sequence and the scrambling sequence determines the scrambling sequence.
  • the sequence determining module is configured to determine, according to the identifier indicated in the scheduling signaling, the scrambling sequence, when the information to be sent is scheduling signaling, The identifier indicated in the scheduling signaling is used to identify the identification information of the data packet.
  • the sequence determining module includes:
  • a fifth determining unit configured to determine, according to the bit information in the identifier of the sending device, the scrambling sequence, when all the bit information of the identifier indicated in the scheduling signaling is included in the data packet ;
  • a sixth determining unit configured to determine, according to the remaining bit information in the identifier indicated by the scheduling signaling, when the data packet includes partial bit information of the identifier indicated in the scheduling signaling Scrambling sequence.
  • the second aspect provides a sending device, where the sending device includes: a processor and a transmitter, where the processor is configured to determine a corresponding scrambling sequence according to the communication parameter of the information to be sent, according to the scrambling sequence And scrambling a cyclic redundancy check CRC bit corresponding to the information to be sent, generating a scrambled CRC bit, and generating a data packet of the to-be-sent information, where the data packet includes the scrambled CRC bit;
  • the processor configured to control the transmitter to send the data packet to a receiving device, where the receiving device parses the scrambling sequence according to the received scrambled CRC bit, according to the The scrambling sequence determines the communication parameter, and performs receiving processing on each data packet sent by the sending device according to the communication parameter;
  • the communication parameter is used to indicate retransmission information, a synchronization signal corresponding to the sending device, or identification information of the data packet.
  • the processor is configured to: when the information to be sent is scheduling signaling, and the communication parameter is used to indicate retransmission information, according to the first retransmission information Determining the scrambling sequence, where the first retransmission information is used to indicate whether the data packet is a retransmission data packet.
  • the processor is configured to acquire a scrambling sequence of a data packet of the previous scheduling signaling sent by the sending device;
  • the processor configured to: when the first retransmission information indicates that the data packet is a retransmission data packet, determine that the scrambling sequence is a scrambling sequence of a data packet of the previous scheduling signaling;
  • the processor configured to: when the first retransmission information indicates that the data packet is not a retransmission data packet, determine that the scrambling sequence is a scrambling sequence of a data packet of the previous scheduling signaling difference Another scrambling sequence.
  • the processor is configured to: when the information to be sent is scheduling signaling, and the communication parameter is used to indicate retransmission information, according to the second retransmission information Determining the scrambling sequence, wherein the second retransmission information is used to indicate the number of retransmissions of the data packet; wherein, in a predefined period, the number of retransmissions of each scheduling signaling packet is the same .
  • the processor is configured to: when the information to be sent is scheduling signaling, the communication parameter is used to indicate retransmission information, and the data packet is retransmitted When the number of times is the same as the number of retransmissions of the data packet of the next scheduling signaling, the scrambling sequence is determined according to the third retransmission information, where the third retransmission information is used to indicate the number of retransmissions of the data packet. ;
  • the processor is configured to: when the to-be-sent information is scheduling signaling, the communication parameter is used to indicate re-transmission information, and the retransmission of the data packet and the retransmission of the data packet of the next scheduling signaling When the number of times is different, the scrambling sequence is determined according to the fourth retransmission information, where the fourth retransmission information is used to indicate the number of retransmissions of the data packet of the next scheduling signaling.
  • the processor is configured to: when the information to be sent is scheduling signaling, and the communication parameter is used to indicate retransmission information, according to the fifth retransmission information Determining the scrambling sequence, where the fifth retransmission information is used to indicate the number of retransmissions of data packets of each service data corresponding to the scheduling signaling, or the fifth retransmission information is used to indicate the scheduling The number of retransmissions of the first data packet in the data packet of each service data corresponding to the signaling; when the fifth retransmission information is used to indicate the number of retransmissions of the data packet of each service data corresponding to the scheduling signaling The number of retransmissions of the data packets of each service data corresponding to the scheduling signaling is the same.
  • the processor is configured to: when the information to be sent is service data, and the communication parameter is used to indicate retransmission information, determine according to the sixth retransmission information The scrambling sequence, wherein the sixth retransmission information is used to indicate the number of retransmissions of the data packet; wherein, the weight of the data packet of different service data between the data packets of two adjacent scheduling signaling The number of transmissions is the same.
  • the processor is configured to: when the information to be sent is service data, and the communication parameter is used to indicate retransmission information, determine according to the seventh retransmission information The scrambling sequence, wherein the seventh retransmission information is used to indicate a number of retransmissions of data packets of at least one service data subsequent to the data packet.
  • the processor is configured to determine, according to the identifier of the synchronization signal corresponding to the sending device, the scrambling sequence when the information to be sent is scheduling signaling Column.
  • the processor is configured to perform, according to the identifier of the synchronization signal, and the identifier of the synchronization signal that is preset The correspondence between the scrambling sequences determines the scrambling sequence.
  • the processor is configured to: when the information to be sent is scheduling signaling, determine the scrambling sequence according to the identifier indicated in the scheduling signaling, where The identifier indicated in the scheduling signaling is used to characterize the identification information of the data packet.
  • the processor is configured to determine, according to the bit information in the identifier of the sending device, the scrambling sequence, when all the bit information of the identifier indicated in the scheduling signaling is included in the data packet. ;
  • the processor configured to determine, according to the remaining bit information in the identifier indicated by the scheduling signaling, when the data packet includes partial bit information of the identifier indicated in the scheduling signaling Scrambling sequence.
  • a receiving device where the receiving device includes:
  • a receiving module configured to receive a data packet sent by the sending device, where the data packet includes a scrambled cyclic redundancy check CRC bit;
  • a descrambling module configured to parse the scrambling sequence according to the scrambled CRC bits
  • a communication parameter determining module configured to determine, according to the scrambling sequence, a communication parameter of information included in the data packet
  • a processing module configured to perform receiving processing on each data packet sent by the sending device according to the communication parameter
  • the communication parameter is used to indicate retransmission information, a synchronization signal corresponding to the sending device, or identification information of the data packet.
  • the processing module includes:
  • a first determining unit configured to: when the information included in the data packet is scheduling signaling, where the communication parameter is used to indicate whether the data packet is the first retransmission information of the retransmitted data packet, according to the Determining, by the first retransmission information, whether the data packet is a retransmission data packet;
  • the first receiving unit is configured to receive the data packet according to the determination result of the first determining unit.
  • the processing module is used And when the information included in the data packet is scheduling signaling, where the communication parameter is second retransmission information used to indicate the number of retransmissions of the data packet, receiving the The data packet; wherein, in a predefined period, the number of retransmissions of the data packets of each scheduling signaling is the same.
  • the communications parameter determining module includes: a second sequence acquiring unit, configured to acquire, when the information included in the data packet is scheduling signaling, the sending device a scrambling sequence of the data packet of the previous scheduling signaling sent;
  • a second determining unit configured to determine whether the scrambling sequence is the same as a scrambling sequence of the data packet of the previous scheduling signaling
  • a seventh determining unit configured to determine, if the result of the scrambling sequence is the same as the scrambling sequence of the data packet of the previous scheduling signaling, determining that the scrambling sequence is used to indicate the weight of the data packet The third retransmission information of the number of transmissions;
  • An eighth determining unit configured to determine, if the result of the scrambling sequence is different from a scrambling sequence of the data packet of the previous scheduling signaling, determining that the scrambling sequence is used to indicate a subsequent scheduling signaling.
  • the processing module is configured to: when the information included in the data packet is scheduling signaling, where the communication parameter is the fifth retransmission information, according to the foregoing
  • the fifth retransmission information is used to receive the data packet of each service data corresponding to the scheduling signaling; the fifth retransmission information is used to indicate the number of retransmissions of the data packet of each service data corresponding to the scheduling signaling, or
  • the fifth retransmission information is used to indicate the number of retransmissions of the first data packet in the data packet of the service data corresponding to the scheduling signaling; and the fifth retransmission information is used to indicate that the scheduling signaling corresponds to
  • the number of retransmissions of the data packets of the respective service data is the same, the number of retransmissions of the data packets of the respective service data corresponding to the scheduling signaling is the same.
  • the processing module is configured to: when the information to be sent is service data, the communication parameter is a sixth weight used to indicate the number of retransmissions of the data packet And transmitting, according to the number of retransmissions of the data packet, each data packet including the service data, where the number of retransmissions of data packets of different service data between data packets of two adjacent scheduling signalings the same.
  • the processing module is configured to: when the information to be sent is service data, where the communication parameter is data used to indicate at least one service data after the data packet When the seventh retransmission information of the number of retransmissions of the packet is received, the data packet of the at least one service data is received according to the number of retransmissions of the data packet of the at least one service data after the data packet.
  • the processing module includes: a synchronization unit, configured to: when the information to be sent is scheduling signaling, where the communication parameter is used to indicate synchronization of the sending device When the signal is identified, the synchronization device corresponding to the identifier of the synchronization signal performs signal synchronization;
  • a second receiving unit configured to receive, after the synchronization unit completes synchronization, each data packet that is subsequently sent by the sending device.
  • the communication parameter determining module is configured to perform, according to the scrambling sequence, a preset identifier of the synchronization signal A correspondence between the scrambling sequence and the scrambling sequence determines an identification of the synchronization signal.
  • the processing module is configured to: when the information to be sent is scheduling signaling, where the communication parameter is an identifier indicated in the scheduling signaling, according to the The identifier indicated in the scheduling signaling receives each data packet that is sent by the sending device and includes the scheduling signaling, where the identifier indicated in the scheduling signaling is used to identify the identifier information of the data packet.
  • a fourth aspect provides a receiving device, where the receiving device includes: a receiver and a processor, where the processor is configured to control the receiver to receive a data packet sent by the sending device, where the data packet includes The scrambled cyclic redundancy check CRC bit;
  • the processor is configured to parse a scrambling sequence according to the scrambled CRC bits, and determine, according to the scrambling sequence, a communication parameter of information included in the data packet;
  • the processor is configured to control, by the receiver, to receive, according to the communication parameter, each data packet sent by the sending device;
  • the communication parameter is used to indicate retransmission information, a synchronization signal corresponding to the sending device, or identification information of the data packet.
  • the processor is configured to: when the information included in the data packet is scheduling signaling, where the communication parameter is used to indicate whether the data packet is retransmitted
  • the receiver is controlled to determine, according to the first retransmission information, whether the data packet is a retransmission data packet, and receive the data packet according to the determination result.
  • the processor is configured to: when the information included in the data packet is scheduling signaling, where the communication parameter is used to indicate the number of retransmissions of the data packet
  • the receiver is controlled to receive the data packet according to the number of retransmissions of the data packet; wherein, in a predefined period, the number of retransmissions of the data packets of each scheduling signaling is the same.
  • the processor is configured to be used in the data packet
  • the included information is scheduling signaling
  • acquiring a scrambling sequence of the data packet of the previous scheduling signaling sent by the sending device and determining a scrambling sequence of the data packet of the scrambling sequence and the previous scheduling signaling If the result of the determination is that the scrambling sequence is the same as the scrambling sequence of the data packet of the previous scheduling signaling, determining that the scrambling sequence is used to indicate the number of retransmissions of the data packet If the result of the determination is that the scrambling sequence is different from the scrambling sequence of the data packet of the previous scheduling signaling, determining that the scrambling sequence is a data packet for indicating the next scheduling signaling
  • the processor is configured to: when the information included in the data packet is scheduling signaling, where the communication parameter is the fifth retransmission information, control the receiving Receiving, according to the fifth retransmission information, a data packet of each service data corresponding to the scheduling signaling; the fifth retransmission information is used to indicate retransmission of a data packet of each service data corresponding to the scheduling signaling The number of times, or the fifth retransmission information is used to indicate the number of retransmissions of the first data packet in the data packet of each service data corresponding to the scheduling signaling; When the number of retransmissions of the data packets of each service data corresponding to the scheduling signaling is described, the number of retransmissions of the data packets of the respective service data corresponding to the scheduling signaling is the same.
  • the processor is configured to: when the information to be sent is service data, the communication parameter is a sixth weight used to indicate the number of retransmissions of the data packet And transmitting, by the receiver, each data packet including the service data according to the number of retransmissions of the data packet, where data of different service data between data packets of two adjacent scheduling signalings The number of retransmissions of the packet is the same.
  • the processor is configured to: when the information to be sent is service data, the communication parameter is data used to indicate at least one service data after the data packet And receiving, by the receiver, the data packet of the at least one service data according to the number of retransmissions of the data packet of the at least one service data after the data packet.
  • the processor is configured to: when the information to be sent is scheduling signaling, where the communication parameter is used to indicate an identifier of a synchronization signal corresponding to the sending device, The synchronization device corresponding to the identifier of the synchronization signal performs signal synchronization, and controls the receiver to receive each data packet subsequently sent by the transmission device after synchronization is completed.
  • the processor is configured to perform, according to the scrambling sequence, an identifier of the synchronization signal that is preset A correspondence between the scrambling sequence and the scrambling sequence determines an identification of the synchronization signal.
  • the processor is configured to: when the information to be sent is scheduling signaling, where the communication parameter is an identifier indicated in the scheduling signaling, according to the The identifier indicated in the scheduling signaling receives each data packet that is sent by the sending device and includes the scheduling signaling, where the identifier indicated in the scheduling signaling is used to identify the identifier information of the data packet.
  • a fifth aspect provides a wireless communication method, in a sending device, where the method includes: determining a corresponding scrambling sequence according to a communication parameter of information to be sent;
  • Transmitting the data packet to a receiving device and the receiving device parses the scrambling sequence according to the received scrambled CRC bit, determining the communication parameter according to the scrambling sequence, and determining, according to the scrambling sequence,
  • the communication parameter performs receiving processing on each data packet sent by the sending device;
  • the communication parameter is used to indicate retransmission information, a synchronization signal corresponding to the sending device, or identification information of the data packet.
  • the determining, according to the communication parameter of the information to be sent, the corresponding scrambling sequence includes:
  • the scrambling sequence is determined according to the first retransmission information, where the first retransmission information is used to indicate Whether the data packet is a retransmitted data packet.
  • the determining, by the first retransmission information of the scheduling signaling, the scrambling sequence includes:
  • the determining, according to the communication parameter of the information to be sent, the corresponding scrambling sequence includes:
  • the root Determining the scrambling sequence according to the second retransmission information, where the second retransmission information is used to indicate the number of retransmissions of the data packet;
  • the determining, according to the communication parameter of the information to be sent, the corresponding scrambling sequence includes:
  • the communication parameter is used to indicate retransmission information, and the number of retransmissions of the data packet is the same as the number of retransmissions of the data packet of the next scheduling signaling, according to the third Retransmitting the information to determine the added sequence, wherein the third retransmission information is used to indicate the number of retransmissions of the data packet;
  • the communication parameter is used to indicate retransmission information, and the number of retransmissions of the data packet is different from the number of retransmissions of the data packet of the next scheduling signaling, according to the fourth
  • the retransmission information is used to determine the scrambling sequence, where the fourth retransmission information is used to indicate the number of retransmissions of the data packet of the next scheduling signaling.
  • the determining, according to the communication parameter of the information to be sent, the corresponding scrambling sequence includes:
  • the information to be sent is the scheduling signaling
  • the communication parameter is used to indicate the retransmission information
  • determining the scrambling sequence according to the fifth retransmission information where the fifth retransmission information is used to indicate the scheduling The number of retransmissions of the data packet of each service data corresponding to the signaling, or the fifth retransmission information is used to indicate the number of retransmissions of the first data packet in the data packet of each service data corresponding to the scheduling signaling
  • the fifth retransmission information is used to indicate the number of retransmissions of the data packets of the service data corresponding to the scheduling signaling
  • the retransmission times of the data packets of the respective service data corresponding to the scheduling signaling are the same.
  • the determining, according to the communication parameter of the information to be sent, the corresponding scrambling sequence includes:
  • the scrambling sequence is determined according to the sixth retransmission information, where the sixth retransmission information is used to indicate the The number of retransmissions of the data packet;
  • the number of retransmissions of data packets of different service data between data packets of two adjacent scheduling signalings is the same.
  • the determining, according to the communication parameter of the information to be sent, the corresponding scrambling sequence includes:
  • the root Determining the scrambling sequence according to the seventh retransmission information, where the seventh retransmission information is used to indicate the number of retransmissions of the data packet of the at least one service data after the data packet.
  • the determining, according to the communication parameter of the information to be sent, the corresponding scrambling sequence includes:
  • the information to be sent is scheduling signaling, determining the scrambling sequence according to the identifier of the synchronization signal corresponding to the sending device.
  • the determining, according to the identifier of the synchronization signal corresponding to the sending device, the scrambling sequence, The identification of the synchronization signal and the correspondence between the identification of the synchronization signal set in advance and the scrambling sequence determine the scrambling sequence.
  • the determining, according to the communication parameter of the information to be sent, the corresponding scrambling sequence includes:
  • the scrambling sequence is determined according to the identifier indicated in the scheduling signaling, and the identifier indicated in the scheduling signaling is used to identify the identifier information of the data packet.
  • the determining, by the identifier indicated in the scheduling signaling, the scrambling sequence includes:
  • the data packet includes all the bit information of the identifier indicated in the scheduling signaling, determining the scrambling sequence according to bit information at a specified position in the identifier of the sending device;
  • the scrambling sequence is determined according to remaining bit information in the identifier indicated in the scheduling signaling.
  • a sixth aspect provides a wireless communication method, in a receiving device, where the method includes: receiving a data packet sent by a sending device, where the data packet includes a scrambled cyclic redundancy check
  • each data packet sent by the sending device where the communication parameter is used to indicate retransmission information, a synchronization signal corresponding to the sending device, or identifier information of the data packet.
  • the receiving by the receiving, the processing, by the
  • the communication parameter is used to indicate the number And determining whether the data packet is a retransmission data packet according to the first retransmission information, and receiving the data packet according to the determination result, according to whether the packet is the first retransmission information of the retransmission data packet.
  • the information included in the data packet is scheduling signaling, where the communication parameter is the second retransmission information used to indicate the number of retransmissions of the data packet, receiving, according to the number of retransmissions of the data packet, data pack;
  • the determining, by the scrambling sequence, the communication parameter of the information included in the data packet includes:
  • the scrambling sequence is different from the scrambling sequence of the data packet of the previous scheduling signaling, determining that the scrambling sequence is the number of retransmissions of the data packet used to indicate the next scheduling signaling.
  • the fourth retransmission information is the fourth retransmission information.
  • the receiving by the receiving, the processing, the
  • the information included in the data packet is the scheduling signaling, and the communication parameter is the fifth retransmission information, receiving, according to the fifth retransmission information, a data packet of each service data corresponding to the scheduling signaling;
  • the fifth retransmission information is used to indicate the number of retransmissions of the data packets of the service data corresponding to the scheduling signaling, or the fifth retransmission information is used to indicate the service data corresponding to the scheduling signaling.
  • the service data is received according to the number of retransmissions of the data packet.
  • the receiving by the receiving, the processing, the
  • the communication parameter is the seventh retransmission information for indicating the number of retransmissions of the data packet of the at least one service data after the data packet, according to the data packet.
  • the number of retransmissions of the data packet of the at least one service data receives the data packet of the at least one service data.
  • the receiving by the receiving, the processing, by the
  • the synchronization device corresponding to the identifier of the synchronization signal performs signal synchronization, and after the synchronization is completed. Receiving each data packet subsequently sent by the sending device.
  • the determining, by using the scrambling sequence, the communication parameter of the information included in the data packet includes: The scrambling sequence and a correspondence between the identifier of the synchronization signal set in advance and the scrambling sequence determine an identification of the synchronization signal.
  • the to-be-sent information is the scheduling signaling
  • the communication parameter is the identifier indicated in the scheduling signaling
  • receiving, according to the identifier indicated in the scheduling signaling, each of the sending devices that are subsequently sent by the sending device includes a scheduling signal.
  • the data packet of the command, the identifier indicated in the scheduling signaling is used to identify the identifier information of the data packet.
  • a wireless communication system where the system includes:
  • a transmitting device according to any of the first aspect, the second aspect, and the first aspect and the second aspect, the third aspect, the fourth aspect, and the third aspect and the fourth A receiving device as claimed in any one of the various possible implementations of the invention.
  • the receiving device is receiving After the data packet of the information is sent, the communication parameter for indicating the retransmission information, the synchronization signal corresponding to the sending device, or the identification information of the data packet is obtained by parsing the scrambling sequence, and each data packet sent by the sending device is received according to the communication parameter.
  • the receiving device only needs to parse each data packet when receiving the data packet.
  • the CRC scrambling sequence can determine the retransmission information, the synchronization information or the identification information of the data packet, and has low computational complexity, and solves the problem that each receiving device needs to receive each of the received data packets including scheduling signaling in the prior art.
  • the problem of decoding and receiving data packets of the service data according to the content of the scheduling signaling achieves the effect of reducing resource consumption and improving system communication efficiency.
  • FIG. 1 is a device configuration diagram of a transmitting device according to an embodiment of the present invention.
  • FIG. 2 is a device configuration diagram of a transmitting device according to another embodiment of the present invention.
  • FIG. 3 is a device configuration diagram of a transmitting device according to another embodiment of the present invention.
  • FIG. 4 is a schematic diagram of SA transmission according to another embodiment of the present invention.
  • FIG. 5 is a schematic diagram of another SA transmission according to another embodiment of the present invention.
  • FIG. 6 is a device configuration diagram of a transmitting device according to another embodiment of the present invention.
  • FIG. 7 is a schematic diagram of still another SA transmission according to another embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of a device of a transmitting device according to another embodiment of the present invention.
  • FIG. 9 is a diagram showing a correspondence between scheduling signaling and service data according to another embodiment of the present invention.
  • FIG. 10 is a schematic diagram of a device configuration of a transmitting device according to another embodiment of the present invention.
  • FIG. 11 is a schematic diagram of service data transmission according to another embodiment of the present invention.
  • FIG. 12 is a schematic structural diagram of a device of a transmitting device according to another embodiment of the present invention.
  • FIG. 13 is a schematic structural diagram of a device of a transmitting device according to another embodiment of the present invention.
  • FIG. 14 is a schematic structural diagram of a device of a transmitting device according to another embodiment of the present invention.
  • FIG. 15 is a schematic structural diagram of a device of a transmitting device according to an embodiment of the present invention.
  • 16 is a device configuration diagram of a transmitting device according to another embodiment of the present invention.
  • FIG. 17 is a device configuration diagram of a transmitting device according to another embodiment of the present invention.
  • FIG. 18 is a structural diagram of a device of a transmitting device according to another embodiment of the present invention
  • FIG. 19 is a device configuration diagram of a transmitting device according to another embodiment of the present invention
  • FIG. 20 is a device configuration diagram of a transmitting device according to another embodiment of the present invention
  • FIG. 22 is a device configuration diagram of a transmitting device according to another embodiment of the present invention
  • FIG. 23 is a device configuration diagram of a transmitting device according to another embodiment of the present invention
  • Figure 25 is a device configuration diagram of a receiving device according to another embodiment of the present invention
  • Figure 26 is a device configuration diagram of a receiving device according to another embodiment of the present invention
  • FIG. 28 is a device configuration diagram of a receiving device according to another embodiment of the present invention
  • FIG. 18 is a structural diagram of a device of a transmitting device according to another embodiment of the present invention
  • FIG. 19 is a device configuration diagram of a transmitting device according to another embodiment of the present invention
  • FIG. 20
  • FIG. 29 is a device configuration diagram of a receiving device according to another embodiment of the present invention
  • FIG. 31 is a device configuration diagram of a receiving device according to another embodiment of the present invention
  • FIG. 32 is another device configuration diagram of a receiving device according to another embodiment of the present invention
  • FIG. 33 is a device configuration diagram of a receiving device according to an embodiment of the present invention
  • FIG. 34 is a device configuration diagram of a receiving device according to another embodiment of the present invention
  • FIG. 36 is a schematic diagram of a device configuration of a receiving device according to another embodiment of the present invention
  • FIG. 37 is a device configuration diagram of a receiving device according to another embodiment of the present invention
  • 38 is a device configuration diagram of a receiving device according to another embodiment of the present invention
  • FIG. 39 is a device configuration diagram of a receiving device according to another embodiment of the present invention.
  • FIG. 40 is a receiving device according to another embodiment of the present invention.
  • FIG. 41 is a schematic diagram of a device configuration of a receiving device according to another embodiment of the present invention;
  • FIG. 42 is a flowchart of a method for wireless communication according to an embodiment of the present invention.
  • FIG. 43 is a flowchart of another embodiment of the present invention.
  • FIG. 44 is a flowchart of a method for wireless communication according to another embodiment of the present invention.
  • FIG. 45 is a flowchart of another embodiment of the present invention.
  • FIG. 47 is a flowchart of a method for wireless communication according to another embodiment of the present invention.
  • FIG. 41 is a schematic diagram of a device configuration of a receiving device according to another embodiment of the present invention.
  • FIG. 42 is a flowchart of a method for wireless communication according to an embodiment of the present
  • FIG. 47 is a flowchart of a method for wireless communication according to another embodiment of the present invention.
  • FIG. 48 is another flowchart of the present invention.
  • FIG. 49 is a flowchart of a method of a wireless communication method according to another embodiment of the present invention.
  • FIG. 51 is a flowchart of a method for wireless communication according to another embodiment of the present invention.
  • FIG. 51 is a flowchart of a method for wireless communication according to an embodiment of the present invention;
  • FIG. 52 is a flowchart of a method for wireless communication according to another embodiment of the present invention.
  • FIG. 53 is a flowchart of a method for wireless communication according to another embodiment of the present invention.
  • FIG. 54 is a flowchart of a method for wireless communication according to another embodiment of the present invention.
  • FIG. 55 is a flowchart of a method for wireless communication according to another embodiment of the present invention.
  • FIG. 56 is a flowchart of a method for wireless communication according to another embodiment of the present invention.
  • FIG. 57 is a flowchart of a method for wireless communication according to another embodiment of the present invention.
  • FIG. 58 is a flowchart of a method for wireless communication according to another embodiment of the present invention.
  • FIG. 59 is a flowchart of a method for wireless communication according to another embodiment of the present invention.
  • Figure 60 is a system configuration diagram of a wireless communication system according to an embodiment of the present invention. detailed description
  • the transmitting device can be a transmitting device in a D2D system.
  • the sending device can include:
  • the sequence determining module 101 is configured to determine a corresponding scrambling sequence according to the communication parameter of the information to be sent, and the scrambling module 102 is configured to perform, according to the scrambling sequence, a cyclic redundancy check CRC bit corresponding to the to-be-sent information. Scrambling, generating a scrambled CRC bit;
  • a data packet generating module 103 configured to generate a data packet of the information to be sent, where the data packet includes the scrambled CRC bit;
  • the sending module 104 is configured to send the data packet to the receiving device, where the receiving device parses the scrambling sequence according to the received scrambled CRC bit, and determines the Communicating parameters, and performing receiving processing on each data packet sent by the sending device according to the communication parameter.
  • the communication parameter is used to indicate retransmission information, a synchronization signal corresponding to the sending device, or identification information of the data packet.
  • the identifier information of the data packet may be used to indicate that the receiving device determines whether the data packet is a data packet corresponding to the receiving device.
  • the sending device provided by the embodiment of the present invention carries the communication parameter of the information to be sent by using the scrambling sequence, and after receiving the data packet of the information to be sent, the receiving device acquires the data by using the scrambling sequence. And indicating a communication parameter of the retransmission information, the synchronization signal corresponding to the sending device, or the identification information of the data packet, and receiving each data packet sent by the sending device according to the communication parameter, and the receiving device only needs to parse each data packet when receiving the data packet.
  • the CRC scrambling sequence can determine the retransmission information, the synchronization information or the identification information of the data packet, and has low computational complexity, and solves the problem that each receiving device needs to receive each of the received data packets including scheduling signaling in the prior art.
  • the problem of decoding and receiving data packets of the service data according to the content of the scheduling signaling achieves the effect of reducing resource consumption and improving system communication efficiency.
  • the CRC is one of the most commonly used error check codes in the field of data communication, and is characterized in that the lengths of the information field and the check field can be arbitrarily selected.
  • the CRC is generated by the transmitting device according to the specific content of the information to be sent and added in the data packet of the information to be transmitted.
  • the receiving device After receiving the data packet, the receiving device first extracts the CRC bit in the data packet according to the CRC bit. The content in the data packet is verified. If the verification is successful, it is determined that the information content contained in the data packet is received correctly.
  • the transmitting device can also scramble the CRC bits using the scrambling sequence, and the transmitting device can perform the CRC correction after descrambling the CRC bits. Test.
  • the solution shown in the present invention that is, the communication parameter is carried by the scrambling sequence well known by the receiving device and the transmitting device, so that the receiving device can directly receive the data packet through the communication parameter carried in the scrambling sequence, and does not need to parse each
  • the specific content contained in a packet reduces computational complexity.
  • the communication parameter may be retransmission information, a synchronization signal corresponding to the transmission device, or identification information of the data packet, etc.
  • the retransmission in various embodiments of the present invention includes two situations: one is repeated transmission of data packets of the same content; the other is to send different RVs in a complete number of packets (Redundancy Version, Redundant version).
  • FIG. 2 a device configuration diagram of a transmitting device according to another embodiment of the present invention is shown.
  • the transmitting device may be a transmitting device in a D2D (Device to Device) device system.
  • the sending device can include:
  • the sequence determining module 201 is configured to determine a corresponding scrambling sequence according to the communication parameter of the information to be sent; The sequence determining module 201 is configured to determine, according to the first retransmission information, the scrambling sequence, when the information to be sent is scheduling signaling, and the communication parameter is used to indicate retransmission information, where The first retransmission information is used to indicate whether the data packet is a retransmission data packet.
  • the sequence determining module 201 includes:
  • the first sequence obtaining unit 201a is configured to acquire a scrambling sequence of the data packet of the previous scheduling signaling sent by the sending device;
  • the first determining unit 201b is configured to: when the first retransmission information indicates that the data packet is a retransmission data packet, determine that the scrambling sequence is a scrambling sequence of the data packet of the previous scheduling signaling;
  • a second determining unit 201c configured to: when the first retransmission information indicates that the data packet is not a retransmission data packet, determine that the scrambling sequence is a scrambling sequence of a data packet with the previous scheduling signaling Another scrambling sequence that is distinguished.
  • the transmitting device In wireless communication, in order to improve the performance of data transmission, expand the coverage of the signal, and ensure that the receiving device can correctly receive data, the transmitting device usually performs multiple retransmissions of the same data packet.
  • the scrambling sequence of the scheduling signaling may be determined according to whether the data packet is a retransmitted data packet.
  • the sending device may obtain a scrambling sequence of the data packet of the previous scheduling signaling sent by the sending device; when the first retransmission information indicates that the data packet is a retransmitted data packet, determining that the scrambling sequence is the former a scrambling sequence of a packet for scheduling signaling; when the first retransmission information indicates that the data packet is not a retransmission data packet, determining that the scrambling sequence is a scrambling sequence of a data packet of a previous scheduling signaling Another scrambling sequence that differs.
  • the scrambling sequence corresponding to the retransmitted data packet ⁇ ' J is [0000000000000000]
  • the scrambling sequence corresponding to the newly transmitted data packet is [01010101010101].
  • the correspondence shown in Table 1 is known to the transmitting device and the receiving device.
  • the scrambling module 202 is configured to scramble the cyclic redundancy check CRC bit corresponding to the to-be-sent information according to the scrambling sequence to generate a scrambled CRC bit.
  • Table 1 when the data packet of the scheduling signaling is retransmitted, it is determined by querying Table 1.
  • the scrambling sequence ⁇ ' J [0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0] is used to scramble the CRC bits corresponding to the scheduling signaling; when the data packet of the scheduling signaling is new transmission It is determined by query table 1 that the scrambling sequence [0 1 0 1 0 1 0 1 0 1 0 1 0 1] is used to scramble the CRC bits corresponding to the scheduling signaling.
  • c k denotes the scrambled bit
  • A denotes the number of bits of the information bits of the data packet
  • p ⁇ A denotes the CRC verification bit
  • x kA denotes the scrambling sequence of the CRC in Table 1
  • a data packet generating module 203 configured to generate a data packet of the to-be-sent information, where the data packet includes the scrambled CRC bit;
  • the receiving device adds the scrambled CRC bits to the scheduling signaling to form uncoded information bits, and encodes the uncoded information bits to generate a data packet of the scheduling signaling.
  • the sending module 204 is configured to send the data packet to the receiving device, where the receiving device parses the scrambling sequence according to the received scrambled CRC bit, and determines the Communicating parameters, and performing receiving processing on each data packet sent by the sending device according to the communication parameter.
  • the sending device sends the data packet through D2D broadcast mode, and after receiving the data packet, the receiving device in the coverage of the D2D signal of the sending device can use the The two sets of sequences respectively descramble the CRC bits in the data packet, determine the sequence of successful descrambling as the scrambling sequence of the CRC bits, and determine the data packet according to the correspondence relationship shown in Table 1 and the determined scrambling sequence. Retransmission or new biography.
  • the cache data corresponding to the same scheduling signaling of the previous or multiple times of receiving the packet needs to be saved, and a new buffer for the next retransmission packet is prepared, and these are corresponding at the baseband.
  • the different retransmission data of the same scheduling signaling is combined, and then the combined data packet is decoded once, without having to decode each retransmission packet separately, reducing the number of decodings and improving the translation.
  • the performance of the code if the data packet is a new transport packet, the baseband data of the data packet of the previous scheduling signaling in the physical layer cache may be cleared, and the buffer for receiving the new transport packet is prepared.
  • the receiving device can determine whether the data packet of the scheduling signaling is a retransmitted data packet or a newly transmitted data packet by parsing a scrambling sequence of the CRC bits of the scheduling signaling, so that the demodulation is prepared in advance. Resources and consolidation methods to improve reception efficiency.
  • the receiving device may also merge the data packet with other data packets of the same scheduling signaling, and combine the multiple data. The packet is only decoded once, and for users with limited coverage, the number of decodings can be reduced, and the decoding performance can be improved.
  • the sending device of the embodiment of the present invention determines a scrambling sequence of the scheduling signaling to be sent according to whether the data packet indicating the scheduling signaling is the first retransmission information of the retransmission data packet.
  • the receiving device only needs to pass the scrambling sequence to determine whether the data packet is a retransmission data packet, so that the receiver can prepare resources for demodulation and merge the method in advance, and solve the problem that the receiving device needs to receive the prior art.
  • Each of the packets containing the scheduling signaling is decoded and receives the data packet of the service data according to the content of the scheduling signaling, and reduces the number of decoding attempts for the user with limited coverage, thereby reducing resource consumption and improving the system.
  • FIG. 3 shows a device configuration diagram of a transmitting device according to an embodiment of the present invention.
  • the transmitting device may be a transmitting device in a D2D system.
  • the sending device can include:
  • the sequence determining module 301 is configured to determine a corresponding scrambling sequence according to the communication parameter of the information to be sent, where the sequence determining module 301 is configured to: when the information to be sent is scheduling signaling, and the communication parameter is used to indicate Determining the scrambling sequence according to the second retransmission information, where the second retransmission information is used to indicate the number of retransmissions of the data packet;
  • the number of retransmissions of the data packets of each scheduling signaling is the same in a predefined period. For example, use four sets of 16-bit plus 4 special sequences to correspond to four retransmission times, as shown in Table 2 below:
  • the number of retransmissions is 1 to indicate that the packet is sent only once, the number of retransmissions is 2 to indicate that the packet is sent twice, and so on.
  • the scrambling module 302 is configured to scramble the cyclic redundancy check CRC bit corresponding to the to-be-transmitted information according to the scrambling sequence to generate a scrambled CRC bit.
  • a data packet generating module 303 configured to generate the data packet to be sent, where the data packet includes the scrambled CRC bit;
  • the receiving device adds the scrambled CRC bits to the scheduling signaling to form uncoded information bits, and encodes the uncoded information bits to generate a data packet of the scheduling signaling.
  • the sending module 304 is configured to send the data packet to the receiving device, where the receiving device parses the scrambling sequence according to the received scrambled CRC bit, and determines, according to the scrambling sequence, the Communicating parameters, and performing receiving processing on each data packet sent by the sending device according to the communication parameter.
  • the number of retransmissions of each data packet carrying different scheduling signaling is the same in a large period, for example, a SA (Scheduling Assignment) transmission diagram as shown in FIG.
  • the SA is a packet of scheduling signaling, wherein the number of retransmissions of SA ⁇ SAn is the same, both are 2, and the scrambling sequence used by each SA corresponds to the second sequence in Table 2.
  • the so-called large period refers to a period in which the interval in which the SA occurs in a periodic manner is larger.
  • the interval between two adjacent SAs is 40ms (milliseconds), and the SA occurs periodically according to this interval.
  • a large period can be defined as 1000ms, which is equivalent to Is (seconds).
  • a large period can be defined as 1024ms.
  • the scrambling sequence used by the SA whose retransmission times are changed may be modified correspondingly, for example, another type as shown in FIG.
  • the SA transmission diagram is in which the number of retransmissions of SA n+1 is changed to three times, and the scrambling sequence used by SA n+1 is changed to the third group sequence in Table 2.
  • the sending device sends the data packet through the D2D broadcast mode, and after receiving the data packet, the receiving device in the coverage of the D2D signal of the transmitting device can use the The four sets of sequences respectively descramble the CRC bits in the data packet, determine the sequence of successful descrambling as the scrambling sequence of the CRC bits, and determine the data packet according to the correspondence relationship shown in Table 2 and the determined scrambling sequence.
  • the number of retransmissions is prepared, and a buffer for each retransmission packet is prepared according to the number of retransmissions, and these different retransmission data packets corresponding to the same scheduling signaling are combined at the baseband.
  • the receiving device cannot acquire any cell related to the SA before receiving the SA.
  • the signaling overhead needs to be increased, and the content of the SA can only be parsed one by one because the number of retransmissions of the SA cannot be known.
  • the probability of failure is high, and it is often necessary to try to obtain the retransmission packet of the SA multiple times.
  • it is not necessary to add an additional signaling indication in the SA and the retransmission sequence of the CRC can implicitly indicate the number of retransmissions of the SA, which not only saves the number of retransmissions.
  • the signaling overhead, and the number of retransmissions of the entire SA packet is given before the SA content is demodulated, so that the receiving device of the SA can directly receive the subsequent data packet of the corresponding retransmission number and combine it to reduce the reception.
  • the number of attempts by the device to obtain the retransmission packet of the SA reduces the computational complexity and improves the demodulation performance of the SA.
  • the sending device determines the number of retransmissions of the scheduling signaling data packet by parsing the scrambling sequence of the CRC bits in the scheduling signaling data packet, and before demodulating the data packet of the scheduling signaling, The number of data packets that need to be combined and decoded and decoded is determined, thereby improving the accuracy of decoding, reducing the number of attempts of the receiving device, and improving the communication performance of the system.
  • the sending device determines the scrambling sequence corresponding to the scheduling signaling to be sent according to the second retransmission information indicating the number of retransmissions of the data packet of the scheduling signaling, and receives
  • the device only needs to pass the scrambling sequence to determine the number of retransmissions of the data packet, and solves the problem that the receiving device needs to decode each received data packet including scheduling signaling according to the scheduling signaling in the prior art.
  • the problem of the data packet of the service data is achieved, and the effect of reducing the resource consumption is achieved.
  • the wireless communication method provided by the embodiment of the present invention can also know how many packets can be combined and demodulated and decoded before demodulation, thereby enabling Improve the correctness of the decoding, reduce the number of unnecessary attempts of the receiver, and improve the communication performance of the system.
  • FIG. 6 a device configuration diagram of a transmitting device according to another embodiment of the present invention is shown.
  • the transmitting device may be a transmitting device in a D2D (Device to Device) device system.
  • the sending device can include:
  • the sequence determining module 401 is configured to determine a corresponding scrambling sequence according to the communication parameter of the information to be sent.
  • the sequence determining module 401 includes:
  • the third determining unit 401a is configured to: when the to-be-sent information is scheduling signaling, the communication parameter is used to indicate retransmission information, and the number of retransmissions of the data packet is the same as the data packet of the next scheduling signaling.
  • the scrambling sequence is determined according to the third retransmission information, where the third retransmission information is used to indicate the number of retransmissions of the data packet; a fourth determining unit 401b, configured to: when the to-be-sent information is scheduling signaling, where the communication parameter is used to indicate retransmission information, and the number of retransmissions of the data packet is the same as the data packet of the next scheduling signaling.
  • the scrambling sequence is determined according to the fourth retransmission information, where the fourth retransmission information is used to indicate the number of retransmissions of the data packet of the next scheduling signaling.
  • the four groups of 16-bit plus 4 special sequences respectively correspond to four retransmission times, and the correspondence between the number of retransmissions of the data packet and the scrambling sequence is as shown in Table 2 of the embodiment.
  • the sending device When determining the scrambling sequence, the sending device first acquires the number of retransmissions of the data packet of the next scheduling signaling, and determines whether the number of retransmissions of the data packet of the next scheduling signaling and the number of retransmissions of the data packet of the current scheduling signaling are If the two are the same, the sequence corresponding to the number of retransmissions of the data packet of the current scheduling signaling is determined as the scrambling sequence used by the data packet of the current scheduling signaling; if the two are different, The sequence corresponding to the number of retransmissions of the data packet of the next scheduling signaling is determined as the scrambling sequence used by the data packet of the current scheduling signaling.
  • SAr ⁇ SAn has the same number of retransmissions, both of which are 2 times, and the number of retransmissions of SA n+1 is 3 times, and SA ⁇ SA ⁇ is used.
  • the scrambling sequence is the second set of sequences in Table 2, and the scrambling sequence used by SA n is the third set of sequences in Table 3.
  • the scrambling module 402 is configured to scramble the cyclic redundancy check CRC bit corresponding to the to-be-transmitted information according to the scrambling sequence to generate a scrambled CRC bit.
  • a data packet generating module 403, configured to generate the data packet to be sent, where the data packet includes the scrambled CRC bit;
  • the receiving device adds the scrambled CRC bits to the scheduling signaling to form uncoded information bits, and encodes the uncoded information bits to generate a data packet of the scheduling signaling.
  • a sending module 404 configured to send the data packet to a receiving device, where the receiving device parses the scrambling sequence according to the received scrambled CRC bit, and determines, according to the scrambling sequence, the Communicating parameters, and performing receiving processing on each data packet sent by the sending device according to the communication parameter.
  • the sending device sends the data packet through the D2D broadcast mode, and after receiving the data packet, the receiving device in the coverage of the D2D signal of the transmitting device can use the The four sets of sequences respectively descramble the CRC bits in the data packet, determine that the sequence of successful descrambling is the scrambling sequence of the CRC bits, and obtain the scrambling sequence corresponding to the data packet of the previous scheduling signaling sent by the sending device; Determining whether the scrambling sequence is the same as the scrambling sequence corresponding to the data packet of the previous scheduling signaling; if the judgment result is the scrambling sequence and the previous one If the scrambling sequence corresponding to the data packet of the scheduling signaling is the same, determining that the scrambling sequence is the third retransmission information for indicating the number of retransmissions of the data packet; if the judgment result is the scrambling sequence and the previous scheduling If the scrambling sequence corresponding
  • the receiving device determines, according to the judgment result and the correspondence relationship shown in Table 2, the number of retransmissions of the data packet of the current scheduling signaling and the number of retransmissions of the data packet of the next scheduling signaling, and prepares the data packets for the two scheduling signaling.
  • the respective cache stores the data packets for the two scheduling signaling.
  • the receiving device determines that the number of retransmissions indicated by the scrambling sequence used by the SA of the received new scheduling signaling is the same as the number of retransmissions used by the actual SA, determining the SA of the next scheduling signaling to be received.
  • the number of retransmissions is the same as the number of retransmissions of the SA of the currently received scheduling signaling. If the receiving device determines that the number of retransmissions indicated by the scrambling sequence used by the SA of the current scheduling signaling is different from the number of retransmissions actually used, determining the number of retransmissions of the SA of the next scheduling signaling to be received.
  • the number of retransmissions of the SA that is currently received by the scheduling signaling is different; the receiving device determines, according to Table 2, the number of retransmissions of the SA of the current scheduling signaling and the number of retransmissions of the SA of the next scheduling signaling to be received, According to this, the SA of the new scheduling signaling and the SA of the next scheduling signaling are allocated, and the number of times the next scheduling signaling SA receives the combining is prepared in advance.
  • the receiving device cannot obtain any control signaling about the format and retransmission information of the SA before receiving the SA. If the retransmitted information is placed in the SA packet, the signaling overhead needs to be increased, and Because the number of retransmissions of the SA cannot be known, the content of the SA can only be parsed one by one, and the probability of parsing failure is high. It is often necessary to try to obtain the retransmission packet of the SA multiple times.
  • the scrambling sequence of the CRC can implicitly indicate the number of retransmissions of the next SA to be received, which not only saves Indicates the signaling overhead of the number of retransmissions, and gives the number of retransmissions of the entire SA packet before demodulating the SA content, so that the receiving device of the SA can directly receive the subsequent data packet of the corresponding retransmission number.
  • the combination is performed to reduce the number of attempts by the receiving device to obtain the retransmission packet of the SA, which reduces the computational complexity and improves the demodulation performance of the SA.
  • the sending device according to the embodiment of the present invention, is configured according to the number of retransmissions of the data packet corresponding to the scheduling signaling and the number of retransmissions of the data packet of the next scheduling signaling.
  • the number of retransmissions of the data packet determines the scrambling sequence; when the number of retransmissions of the data packet corresponding to the scheduling signaling is different from the number of retransmissions of the data packet of the next scheduling signaling, according to the data packet of the next scheduling signaling
  • the number of retransmissions determines the scrambling sequence, and the receiving device only needs to compare the actual number of retransmissions used by the current scheduling signaling with the scrambling sequence used by the current scheduling signaling to determine the data of the next scheduling signaling.
  • FIG. 8 is a structural diagram of a device of a transmitting device according to another embodiment of the present invention.
  • the transmitting device may be a transmitting device in a D2D (Device to Device) device system.
  • the sending device can include:
  • the sequence determining module 501 is configured to determine a corresponding scrambling sequence according to the communication parameter of the information to be sent, where the sequence determining module 501 is configured to: when the information to be sent is scheduling signaling, and the communication parameter is used to indicate And determining, by the fifth retransmission information, the scrambling sequence, where the fifth retransmission information is used to indicate a retransmission number of data packets of each service data corresponding to the scheduling signaling, or The fifth retransmission information is used to indicate the number of retransmissions of the first data packet in the data packet of the service data corresponding to the scheduling signaling; and the fifth retransmission information is used to indicate each of the scheduling signaling When the number of retransmissions of the data packet of the service data is the same, the number of retransmissions of the data packet of each service data corresponding to the scheduling signaling is the same.
  • scheduling signaling corresponds to a scheduling indication of data packets of several service data, for example, using four groups of 16-bit scrambling sequences respectively corresponding to four retransmission times as an example, scrambling used for scheduling signaling packets
  • the number of retransmissions of data packets of each service data corresponding to the scheduling signaling may be as shown in Table 2.
  • the number of retransmissions is 1.
  • the data packet of each service data corresponding to the scheduling signaling is sent only once, the number of retransmissions is 2, the data packet of each service data corresponding to the scheduling signaling is sent twice, and so on. .
  • the fifth retransmission information when used to indicate the number of retransmissions of data packets of each service data corresponding to the scheduling signaling, the data packets of the different service data corresponding to the scheduling signaling are The retransmission times are the same.
  • FIG. 9 a mapping diagram between the scheduling signaling and the service data, where one SA corresponds to n different service data packets, and if the number of retransmissions of each service data packet is 2,
  • the scrambling sequence used by the SA can be determined by the Table 2 query as the second set of sequences in Table 2.
  • the scrambling module 502 is configured to scramble the cyclic redundancy check CRC bit corresponding to the to-be-transmitted information according to the scrambling sequence to generate a scrambled CRC bit.
  • Table 2 when the number of data packet retransmissions of each service data is 1, it is determined by query table 2 that the use of the power port 4 ⁇ ⁇ '] [0000000000000000] corresponds to the scheduling signaling ⁇ CRC t ⁇ Scrambling; when the number of data packet retransmissions of each service data is 2, it is determined by query table 2 that the CRC bit corresponding to the scheduling signaling is added by using the scrambling sequence [01010101010101]
  • a data packet generating module 503, configured to generate the data packet to be sent, where the data packet includes the scrambled CRC bit;
  • the receiving device adds the scrambled CRC bits to the scheduling signaling to form uncoded information bits, and encodes the uncoded information bits to generate a data packet of the scheduling signaling.
  • the sending module 504 is configured to send the data packet to the receiving device, where the receiving device parses the scrambling sequence according to the received scrambled CRC bit, and determines, according to the scrambling sequence, the Communicating parameters, and performing receiving processing on each data packet sent by the sending device according to the communication parameter.
  • the sending device and the receiving device are terminal devices of the D2D system, and the sending device sends the data packet of the scheduling signaling by using a D2D broadcast manner, and the receiving device that is within the coverage of the D2D signal of the sending device receives the data packet of the scheduling signaling.
  • the four groups of sequences in Table 2 can be used to descramble the CRC bits in the data packet respectively, and the sequence of successful descrambling is determined as the scrambling sequence of the CRC bits, and according to the correspondence shown in the table and the determined addition.
  • the scrambling sequence determines the number of retransmissions of data packets of each service data corresponding to the scheduling signaling, and prepares a buffer for retransmission packets for each service data according to the number of retransmissions.
  • the fifth retransmission information may be used to indicate the number of retransmissions of the first data packet in the data packet of each service data corresponding to the scheduling signaling, and the fifth retransmission information is used to indicate each service corresponding to the scheduling signaling.
  • the processing mode when the transmitting device generates the data packet and the fifth retransmission information are used to indicate the number of retransmissions of the data packet of each service data corresponding to the scheduling signaling Similar, it will not be described here.
  • the receiving device After the receiving device determines that the communication parameter is the fifth retransmission information according to the CRC scrambling sequence, the receiving device prepares a buffer for the first data packet in each service data according to only the number of retransmissions indicated by the fifth retransmission information.
  • the weight of the data packet of each service data corresponding to the scheduling signaling is The number of transmissions can be the same or different.
  • the sending device is configured according to the number of services corresponding to the scheduling signaling.
  • the number of retransmissions of the data packet determines the scrambling sequence of the CRC bits of the scheduling signaling, so that the receiving device can determine the data packet of each service data corresponding to the scheduling signaling by parsing the scrambling sequence of the CRC bits of the scheduling signaling.
  • the number of retransmissions of the first service data in each service data does not need to add dedicated signaling in the content of the scheduling signaling, which saves signaling overhead.
  • the sending device determines the number of retransmissions of the data packet of the service data according to the scrambling sequence in the data packet of the scheduling signaling, and can prepare the resource of the data packet of each service data in advance, and directly merge the retransmitted data packets.
  • the computational complexity is reduced and the demodulation performance of each service data packet is improved.
  • the sending device determines the scrambling sequence by using the number of retransmissions of the data packets corresponding to the service data corresponding to the scheduling signaling, and the receiving device only needs to use the data packet of the scheduling signaling.
  • the scrambling sequence can determine the number of retransmissions of the data packet of the first service data corresponding to the different service data or the service data corresponding to the scheduling signaling, and solves the problem that the prior art needs to use the signaling content included in the SA.
  • FIG. 10 shows a device configuration diagram of a transmitting device according to another embodiment of the present invention.
  • the transmitting device may be a transmitting device in a D2D (Device to Device) device system.
  • the sending device can include:
  • the sequence determining module 601 is configured to determine a corresponding scrambling sequence according to the communication parameter of the information to be sent; the sequence determining module 601 is configured to: when the to-be-sent information is service data, and the communication parameter is used to indicate retransmission Determining the scrambling sequence according to the sixth retransmission information, where the sixth retransmission information is used to indicate the number of retransmissions of the data packet;
  • the number of retransmissions of data packets of different service data between data packets of two adjacent scheduling signalings is the same.
  • the correspondence between the number of retransmissions of the data packet of the service data and the scrambling sequence used by the data packet of the service data may be as Table 2 shows.
  • the retransmission number of 1 indicates that the data packet of the service data is sent only once, the number of retransmissions is 2, the data packet of the service data is sent twice, and so on.
  • the scrambling module 602 is configured to scramble the cyclic redundancy check CRC bit corresponding to the to-be-transmitted information according to the scrambling sequence to generate a scrambled CRC bit.
  • the CRC bit corresponding to the service data is scrambled by using the scrambling sequence ⁇ 'J [0000000000000000] through the query table 2;
  • the number of data packet retransmissions of the service data is 2 to use the scrambling sequence [01010101010101] to perform the force port 4 corresponding to the CRC bit corresponding to the service data, and so on.
  • a data packet generating module 603, configured to generate a data packet of the to-be-sent information, where the data packet includes the scrambled CRC bit;
  • the receiving device adds the scrambled CRC bits to the service data to form uncoded information bits, and encodes the uncoded information bits to generate a data packet of the service data.
  • the sending module 604 is configured to send the data packet to the receiving device, where the receiving device parses the scrambling sequence according to the received scrambled CRC bit, and determines the according to the scrambling sequence. Communicating parameters, and performing receiving processing on each data packet sent by the sending device according to the communication parameter.
  • the number of retransmissions of data packets of different service data between data packets of two adjacent scheduling signalings is the same.
  • a service data (DATA) transmission diagram in which a packet of n different service data between SA1 and SA2 is respectively DATA! ⁇ DATA n , and each DATA is retransmitted.
  • the number of times is 2, and the scrambling sequence used by each DATA corresponds to the second set of sequences in FIG.
  • the sending device sends the data packet of the service data by using the D2D broadcast mode, and the receiving device that is within the coverage of the D2D signal of the sending device receives the data packet, and can use the table.
  • the four sets of sequences in 2 respectively descramble the CRC bits in the data packet, determine the sequence of successful descrambling as the scrambling sequence of the CRC bits, and determine the corresponding relationship according to the correspondence shown in Table 2 and the determined scrambling sequence.
  • the number of retransmissions of the data packet of the service data, and the buffer for each retransmission packet is prepared according to the number of retransmissions, and the different retransmission data packets corresponding to the same scheduling signaling are combined at the baseband.
  • the sending device determines, according to the number of retransmissions of the data packet of the service data, a scrambling sequence of the CRC bit of the data packet of the service data, so that the receiving device passes the CRC bit of the data packet of the service data.
  • the scrambling sequence can determine the number of retransmissions of the data packet of the service data, and does not need to add dedicated signaling in the content of the scheduling signaling, thereby saving signaling overhead.
  • the receiving device since the number of retransmissions of data packets of different service data between the data packets of two adjacent scheduling signaling is the same, the receiving device only needs to parse the data packet of one service data to determine the subsequent other data.
  • the number of retransmissions of the data packets of the service data so that the resources of the data packets of each service data can be prepared in advance, and the retransmitted data packets are directly merged, thereby reducing the computational complexity and improving the demodulation of each service data packet. performance.
  • the sending device determines the scrambling sequence corresponding to the service data to be sent according to the sixth retransmission information indicating the number of retransmissions of the data packet of the service data, and the receiving device only
  • the number of retransmissions of the data packet of the service data needs to be determined by using the scrambling sequence, and the signaling overhead required to indicate the number of retransmissions of the service data packet by using the signaling content included in the SA in the prior art is solved.
  • the problem is that the signaling overhead in the SA is reduced, and the receiving device can know the number of retransmissions of the subsequent service data in advance after parsing a service data packet, so that it is convenient to prepare and receive the subsequent data in advance, thereby reducing the calculation.
  • the complexity improves the demodulation performance of each service data packet.
  • the transmitting device may be a transmitting device in a D2D (Device to Device) device system.
  • the sending device can include:
  • the sequence determining module 701 is configured to determine a corresponding scrambling sequence according to the communication parameter of the information to be sent; the sequence determining module 701 is configured to: when the to-be-sent information is service data, and the communication parameter is used to indicate retransmission And determining the scrambling sequence according to the seventh retransmission information, where the seventh retransmission information is used to indicate the number of retransmissions of the data packet of the at least one service data after the data packet.
  • the correspondence between the number of retransmissions of the subsequent at least one service data packet and the scrambling sequence used by the data packet of the current service data is used as an example.
  • the relationship can be as shown in Table 2.
  • the scrambling module 702 is configured to scramble the cyclic redundancy check CRC bit corresponding to the to-be-sent information according to the scrambling sequence to generate a scrambled CRC bit.
  • a data packet generating module 703, configured to generate a data packet of the to-be-sent information, where the data packet includes the scrambled CRC bit;
  • the receiving device adds the scrambled CRC bits to the service data to form uncoded information bits, and encodes the uncoded information bits to generate a data packet of the service data.
  • the sending module 704 is configured to send the data packet to the receiving device, where the receiving device parses the scrambling sequence according to the received scrambled CRC bit, according to the scrambling sequence And determining the communication parameter, and performing receiving processing on each data packet sent by the sending device according to the communication parameter.
  • the sending device sends the data packet of the service data by using the D2D broadcast mode, and the receiving device that is within the coverage of the D2D signal of the sending device receives the data packet, and can use the table.
  • the four sets of sequences in 2 respectively descramble the CRC bits in the data packet, determine the sequence of successful descrambling as the scrambling sequence of the CRC bits, and query according to the correspondence relationship shown in Table 2 and the determined scrambling sequence.
  • the number of retransmissions of the data packet of at least one subsequent service data of the data packet where the number of retransmissions is 1, indicating that the data packet is transmitted only once. And receiving, according to the judgment result, a data packet of the subsequent at least one service data.
  • the sending device determines, according to the number of retransmissions of the data packet of the at least one service data after the data packet of the current service data, the scrambling sequence of the CRC bit of the data packet of the service data, so as to receive
  • the device can determine the number of retransmissions of the data packets of each service data subsequent to the data packet of the service data by parsing the scrambling sequence of the CRC bits of the data packet of the service data, and does not need to add a dedicated letter in the content of the scheduling signaling. Therefore, the signaling overhead is saved.
  • the instruction of the embodiment of the present invention can easily make an indication, thereby making The number of transmissions of data packets of each service data after each SA can be changed as needed, which improves the flexibility of the system.
  • the information to be sent is the scheduling signaling
  • the fifth retransmission information is used to indicate the data packet of each service data corresponding to the scheduling signaling.
  • the scheme of the number of retransmissions of the first data packet is combined, that is, the CRC scrambling sequence in one scheduling signaling indicates the number of retransmissions of the data packet of the first service data after the scheduling signaling, and the scheduling signal.
  • the CRC scrambling sequences of the data packets of the corresponding respective service data are each instructed to retransmit the number of retransmissions of the data packets of at least one service data after itself.
  • the sending device determines the current service to be sent by using the seventh retransmission information according to the number of retransmissions of the data packet of the at least one service data after the data packet indicating the current service data.
  • the scrambling sequence corresponding to the data the receiving device only needs to pass the scrambling sequence to determine the number of retransmissions of the data packet of the at least one service data after the data packet of the service data, and solves the need to use the SA in the prior art.
  • the signaling content indicates the problem of the number of retransmissions of the service data packet, reduces the signaling overhead in the SA, and enables the number of transmissions of each data packet behind each SA to be changed as needed, thereby improving the flexibility of the system. degree.
  • FIG. 13 a device configuration diagram of a transmitting device according to another embodiment of the present invention is shown.
  • the transmitting device may be a transmitting device in a D2D (Device to Device) device system.
  • the sending device can include:
  • the sequence determining module 801 is configured to determine a corresponding scrambling sequence according to the communication parameter of the information to be sent, where the sequence determining module 801 is configured to: when the information to be sent is scheduling signaling, according to the synchronization corresponding to the sending device The identification of the signal determines the scrambling sequence.
  • the sequence determining module 801 is configured to determine the scrambling sequence according to the identifier of the synchronization signal and a preset correspondence between the identifier of the synchronization signal and the scrambling sequence.
  • each D2D device may be within the coverage of the base station or may be outside the coverage of the base station, and the D2D device in the coverage of the base station may directly synchronize with the base station, but outside the coverage of the base station.
  • some D2D devices can be used as synchronization source devices for transmitting synchronization signals, and the remaining D2D devices receive synchronization signals transmitted by the synchronization source devices and synchronize with them. If two devices performing D2D communication are synchronized with the same synchronization source device, the communication effect is optimal, and under normal circumstances, the non-synchronized source device can simultaneously receive synchronization signals sent by multiple synchronization source devices, and The synchronization source device with the strongest signal is synchronized.
  • the synchronization source device corresponding to the sending device and the receiving device may not be the same device, thereby affecting the quality of the D2D communication.
  • the sending device may indicate the synchronization source device corresponding to the sending device by using a scrambling sequence of the scheduling signaling, so that the receiving device receives the scrambling sequence of the scheduling signaling and the sending device. Synchronize to the same sync source device to improve communication quality.
  • the identifiers of the synchronization signals sent by each synchronization device are different, and a one-to-one correspondence between the identifiers of the scrambling sequences and the synchronization signals may be preset to be known for each D2D device, and sent.
  • the device may determine the scrambling sequence according to the identifier of the synchronization signal corresponding thereto and the correspondence between the identifier of the preset synchronization signal and the scrambling sequence.
  • the scrambling module 802 is configured to scramble the cyclic redundancy check CRC bit corresponding to the to-be-transmitted information according to the scrambling sequence to generate a scrambled CRC bit.
  • a data packet generating module 803, configured to generate the data packet to be sent, where the data packet includes the scrambled CRC bit;
  • the receiving device adds the scrambled CRC bits to the scheduling signaling, forms an uncoded information bit, and encodes the uncoded information bits to generate a data packet of the scheduling signaling.
  • the sending module 804 is configured to send the data packet to the receiving device, where the receiving device parses the scrambling sequence according to the received scrambled CRC bit, and determines the Communicating parameters, and performing receiving processing on each data packet sent by the sending device according to the communication parameter.
  • the sending device and the receiving device are terminal devices of the D2D system, and the sending device sends the data packet of the scheduling signaling by using a D2D broadcast manner, and the receiving device that is within the coverage of the D2D signal of the sending device receives the data packet of the scheduling signaling.
  • the scrambling sequence corresponding to the identifier of each synchronization signal received by the receiving device is determined.
  • the receiving device may be configured according to the identifier of each received synchronization signal and the identifier of the scrambling sequence and the synchronization signal.
  • the correspondence relationship determines a scrambling sequence corresponding to the identifiers of the received synchronization signals, and the receiving device separately descrambles the CRC bits in the data packet by using the determined sequence, and determines that the sequence of successful descrambling is the data of the scheduling signaling. And a scrambling sequence of the CRC bits in the packet, and synchronizing with the transmitting device to the same synchronization source device according to the identifier of the synchronization signal corresponding to the scrambling sequence of the CRC bit.
  • the sending device determines the scrambling sequence corresponding to the scheduling signaling to be sent according to the identifier of the synchronization signal corresponding to the sending device, and the receiving device only needs to pass the scrambling sequence to determine
  • the synchronization source device of the transmitting device solves the problem that the demodulation performance is degraded due to different synchronization sources of the transceiver referenced by the communication in the prior art, thereby improving the demodulation performance of the receiver.
  • FIG. 14 there is shown a device configuration diagram of a transmitting device according to another embodiment of the present invention.
  • the transmitting device may be a transmitting device in a D2D (Device to Device) device system.
  • the sending device can include:
  • the sequence determining module 901 is configured to determine a corresponding scrambling sequence according to the communication parameter of the information to be sent, where the sequence determining module 901 is configured to: when the information to be sent is scheduling signaling, according to the indication in the scheduling signaling The identifier identifies the scrambling sequence, and the identifier indicated in the scheduling signaling is used to identify the identifier information of the data packet.
  • the sequence determining module 901 includes:
  • the fifth determining unit 901a is configured to: when the data packet includes all the bit information of the identifier indicated in the scheduling signaling, determine the scrambling according to the bit information at the designated position in the identifier of the sending device.
  • a sixth determining unit 901b configured to: when the data packet includes the label indicated in the scheduling signaling When the partial bit information is recognized, the scrambling sequence is determined according to the remaining bit information in the identifier indicated in the scheduling signaling.
  • the identification information of the data packet may be used to indicate to the receiving device whether the data packet is a data packet corresponding to the receiving device.
  • the identifier indicated in the scheduling signaling may be an identifier of the receiving device that receives the service data corresponding to the scheduling signaling, or may be another type of identifier, and only the identifier may indicate which device is the scheduling signaling.
  • the receiving device of the corresponding business data is sufficient.
  • the data packet of the scheduling signaling may include all the bit information of the identifier indicated in the scheduling signaling, or may only include part of the bit information of the identifier indicated in the scheduling signaling, and the remaining part of the bit information is hidden.
  • the data packet of the scheduling signaling includes all the bit information of the identifier indicated in the scheduling signaling, determining the scrambling sequence according to the bit information at the designated position in the identifier of the sending device;
  • the scrambling sequence is determined according to the remaining bit information in the identifier indicated in the scheduling signaling.
  • the identifier indicated in the scheduling signaling is 8 bits, and the scrambling sequence is 16 bits.
  • the last 2 bits in the identifier indicated by the scheduling signaling may correspond to four groups of scrambling sequences, which are used to indicate four different
  • the destination device the corresponding relationship is shown in Table 3:
  • a and b respectively represent the second-to-last and last digits of the identifier indicated in the scheduling signaling
  • the sending device may determine the CRC of the scheduling signaling according to the last two-query query table 3 of the identifier indicated in the scheduling signaling.
  • the scrambling sequence of bits may be used to determine the CRC of the scheduling signaling according to the last two-query query table 3 of the identifier indicated in the scheduling signaling.
  • the 8-bit bit in the identifier indicated by the scheduling signaling may be completely included in the data packet of the scheduling signaling, and the last two bits correspond to the scrambling sequence; or the first 6 of the identifiers indicated in the scheduling signaling
  • the bit bits are included in the data packet of the scheduling signal, corresponding to the last 2 bits of the scrambling sequence.
  • the scrambling module 902 is configured to scramble the cyclic redundancy check CRC bit corresponding to the to-be-transmitted information according to the scrambling sequence to generate a scrambled CRC bit.
  • the receiving device adds the scrambled CRC bits to the scheduling signaling to form uncoded information bits, and encodes the uncoded information bits to generate a data packet of the scheduling signaling.
  • a sending module 904 configured to send the data packet to a receiving device, where the receiving device parses the scrambling sequence according to the received scrambled CRC bit, and determines, according to the scrambling sequence, the Communicating parameters, and performing receiving processing on each data packet sent by the sending device according to the communication parameter.
  • the sending device and the receiving device are terminal devices of the D2D system, and the sending device sends the data packet of the scheduling signaling by using a D2D broadcast manner, and the receiving device that is within the coverage of the D2D signal of the sending device receives the data packet of the scheduling signaling. And determining, according to the parsed scrambling sequence, the identifier indicated in the scheduling signaling, and determining whether it is the destination device of the data packet of the scheduling signaling, and if yes, parsing the content of the scheduling signaling and receiving the identifier The data packet of each service data corresponding to the signaling is scheduled, otherwise the data packet of the scheduling signaling is discarded.
  • the sending device determines the scrambling sequence corresponding to the scheduling signaling to be sent according to the identifier information of the data packet used to represent the scheduling signaling, and the receiving device only needs to pass the scrambling.
  • the sequence can determine whether the sending device is the destination device of the data packet of the scheduling signaling, and solves the problem that the receiving device needs to decode each received data packet including scheduling signaling according to the scheduling signaling.
  • the problem of receiving data packets of service data achieves the effect of reducing resource consumption and improving system communication efficiency.
  • FIG. 15 a device configuration diagram of a transmitting device according to an embodiment of the present invention is shown.
  • the transmitting device may be a transmitting device in a D2D (Device to Device) device system.
  • the transmitting device may include: a processor 001 and a transmitter 002;
  • the processor 001 is configured to determine a corresponding scrambling sequence according to the communication parameter of the information to be sent, and scramble the cyclic redundancy check CRC bit corresponding to the to-be-sent information according to the scrambling sequence to generate a scrambling After the CRC bit. Generating a data packet of the to-be-sent information, where the data packet includes the scrambled CRC bit;
  • the processor 001 is configured to control the transmitter 002 to send the data packet to a receiving device, and the receiving device parses the scrambling sequence according to the received scrambled CRC bit, according to the The scrambling sequence determines the communication parameter, and sends the communication device according to the communication parameter Each packet sent is subjected to reception processing.
  • the communication parameter is used to indicate retransmission information, a synchronization signal corresponding to the sending device, or identification information of the data packet.
  • the identifier information of the data packet may be used to instruct the receiving device to determine whether the data packet is a data packet corresponding to the receiving device.
  • the sending device provided by the embodiment of the present invention carries the communication parameter of the information to be sent by using the scrambling sequence, and after receiving the data packet of the information to be sent, the receiving device acquires the data by using the scrambling sequence. Instructing retransmission information, a synchronization signal corresponding to the transmitting device, or a communication parameter of the destination device of the data packet, and receiving each data packet sent by the sending device according to the communication parameter, and the receiving device only needs to parse each data packet when receiving the data packet.
  • the CRC scrambling sequence can determine the retransmission information, the synchronization information or the identification information of the data packet, and has low computational complexity, and solves the problem that each receiving device needs to receive each of the received data packets including scheduling signaling in the prior art.
  • the problem of decoding and receiving data packets of the service data according to the content of the scheduling signaling achieves the effect of reducing resource consumption and improving system communication efficiency.
  • FIG. 16 shows a device configuration diagram of a transmitting device according to another embodiment of the present invention.
  • the transmitting device may be a transmitting device in a D2D (Device to Device) device system.
  • the transmitting device may include: a processor 003 and a transmitter 004;
  • the processor 003 is configured to determine a corresponding scrambling sequence according to the communication parameter of the information to be sent, where the processor 003 is configured to: when the information to be sent is scheduling signaling, and the communication parameter is used to indicate And determining, by the first retransmission information, the scrambling sequence, where the first retransmission information is used to indicate whether the data packet is a retransmission data packet.
  • the processor 003 is configured to acquire a scrambling sequence of a data packet of the previous scheduling signaling sent by the sending device, where
  • the processor 003 configured to: when the first retransmission information indicates that the data packet is a retransmission data packet, determine that the scrambling sequence is a scrambling sequence of a data packet of the previous scheduling signaling;
  • the processor 003 is configured to: when the first retransmission information indicates that the data packet is not a retransmission data packet, determine that the scrambling sequence is a scrambling sequence of a data packet with the previous scheduling signaling Another scrambling sequence that is distinguished.
  • the transmitting device In wireless communication, in order to improve the performance of data transmission, expand the coverage of the signal, and ensure that the receiving device can correctly receive data, the transmitting device usually performs multiple retransmissions of the same data packet.
  • the scrambling sequence of the scheduling signaling may be determined according to whether the data packet is a retransmitted data packet.
  • the sending device may obtain a scrambling sequence of the data packet of the previous scheduling signaling sent by the sending device; when the first retransmission information indicates that the data packet is a retransmitted data packet, determining that the scrambling sequence is the former a scrambling sequence of a packet for scheduling signaling; when the first retransmission information indicates that the data packet is not a retransmission data packet, determining that the scrambling sequence is a scrambling sequence of a data packet of a previous scheduling signaling Another scrambling sequence that differs.
  • the two groups of 16-bit plus 4 special sequences are respectively used for corresponding new transmission and retransmission, as shown in Table 1 above, wherein the retransmitted data packet corresponds to a scrambling sequence of [0000000000000000], newly transmitted data.
  • the scrambling sequence corresponding to the packet is [01010101010101].
  • Table 1 the correspondence shown in Table 1 is known to the transmitting device and the receiving device.
  • the processor 003 is configured to scramble a cyclic redundancy check CRC bit corresponding to the to-be-transmitted information according to the scrambling sequence to generate a scrambled CRC bit;
  • c k denotes the scrambled bit
  • A denotes the number of bits of the information bits of the data packet
  • ⁇ denotes the CRC verification bit
  • ⁇ ] ⁇ ⁇ denotes the scrambling sequence of the CRC in Table 1
  • L denotes the CRC parity bit
  • the processor 003 is configured to generate a data packet of the information to be sent, where the data packet includes the scrambled CRC bit;
  • the receiving device adds the scrambled CRC bits to the scheduling signaling to form uncoded information bits, and encodes the uncoded information bits to generate a data packet of the scheduling signaling.
  • the processor 003 is configured to control the transmitter 004 to send the data packet to a receiving device, where the receiving device parses the scrambling sequence according to the received scrambled CRC bit, according to the Determining, by the scrambling sequence, the communication parameter, and performing receiving processing on each data packet sent by the sending device according to the communication parameter;
  • the communication parameter is used to indicate retransmission information, a synchronization signal corresponding to the sending device, or The identification information of the data packet.
  • the identifier information of the data packet may be used to instruct the receiving device to determine whether the data packet is a data packet corresponding to the receiving device.
  • the sending device sends the data packet through D2D broadcast mode, and after receiving the data packet, the receiving device in the coverage of the D2D signal of the sending device can use the The two sets of sequences respectively descramble the CRC bits in the data packet, determine the sequence of successful descrambling as the scrambling sequence of the CRC bits, and determine the data packet according to the correspondence relationship shown in Table 1 and the determined scrambling sequence. Retransmission or new biography.
  • the cache data corresponding to the same scheduling signaling of the previous or multiple times of receiving the packet needs to be saved, and a new buffer for the next retransmission packet is prepared, and these are corresponding at the baseband.
  • the different retransmission data of the same scheduling signaling is combined, and then the combined data packet is decoded once, without having to decode each retransmission packet separately, reducing the number of decodings and improving the translation.
  • the performance of the code if the data packet is a new transport packet, the baseband data of the data packet of the previous scheduling signaling in the physical layer cache may be cleared, and the buffer for receiving the new transport packet is prepared.
  • the sending device can determine whether the data packet of the scheduling signaling is a retransmitted data packet or a newly transmitted data packet by parsing the scrambling sequence of the CRC bits of the scheduling signaling, so that the demodulation is prepared in advance. Resources and consolidation methods to improve reception efficiency.
  • the sending device may also combine the data packet with other data packets of the same scheduling signaling, and perform decoding only on the combined multiple data packets. For users with limited coverage, Reduce the number of decoding and improve decoding performance.
  • the sending device of the embodiment of the present invention determines a scrambling sequence of the scheduling signaling to be sent according to whether the data packet indicating the scheduling signaling is the first retransmission information of the retransmission data packet.
  • the receiving device only needs to pass the scrambling sequence to determine whether the data packet is a retransmission data packet, so that the receiver can prepare resources for demodulation and merge the method in advance, and solve the problem that the receiving device needs to receive the prior art.
  • Each of the packets containing the scheduling signaling is decoded and receives the data packet of the service data according to the content of the scheduling signaling, and reduces the number of decoding attempts for the user with limited coverage, thereby reducing resource consumption and improving the system. The effect of communication efficiency. Please refer to FIG.
  • the transmitting device may be a transmitting device in a D2D (Device to Device) device system.
  • the transmitting device may include: a processor 005 and a transmitter 006;
  • the processor 005 is configured to determine, according to a communication parameter of the information to be sent, a corresponding scrambling sequence;
  • the processor 005 is configured to determine, according to the second retransmission information, the scrambling sequence, when the information to be sent is scheduling signaling, and the communication parameter is used to indicate retransmission information, where the The double transmission information is used to indicate the number of retransmissions of the data packet;
  • the number of retransmissions of the data packets of each scheduling signaling is the same in a predefined period.
  • the four groups of 16-bit scrambling sequences respectively correspond to four retransmission times, as shown in Table 2 above, wherein the number of retransmissions is 1 and the number of retransmissions is 2, and the number of retransmissions is 2 Send twice, and so on.
  • the processor 005 is configured to scramble the cyclic redundancy check CRC bit corresponding to the to-be-transmitted information according to the scrambling sequence to generate a scrambled CRC bit.
  • the CRC corresponding to the scheduling signaling is determined by using the scrambling sequence ⁇ ' J [00 0 00 0 0 00 0 00 0 0 00] by querying Table 2.
  • the bit is performed by the force port 4; when the number of data packet retransmissions is 2, it is determined by using the scrambling table 2 that the scrambling sequence [0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1] is used to correspond to the scheduling signaling.
  • the CRC bits are scrambled, and so on.
  • the processor 005 is configured to generate a data packet of the information to be sent, where the data packet includes the scrambled CRC bit;
  • the receiving device adds the scrambled CRC bits to the scheduling signaling to form uncoded information bits, and encodes the uncoded information bits to generate a data packet of the scheduling signaling.
  • the processor 005 is configured to control the transmitter 006 to send the data packet to a receiving device, and the receiving device parses the scrambling sequence according to the received scrambled CRC bit, according to the The scrambling sequence determines the communication parameter, and performs receiving processing on each data packet sent by the sending device according to the communication parameter.
  • the number of retransmissions of each data packet carrying different scheduling signaling is the same in a large period, for example, a SA (Scheduling Assignment) transmission diagram as shown in FIG.
  • the SA is a packet of scheduling signaling, wherein the number of retransmissions of SA ⁇ SAn is the same, both are 2, and the scrambling sequence used by each SA corresponds to the second sequence in Table 2.
  • the so-called large period refers to a period in which the interval in which the SA occurs in a periodic manner is larger.
  • the interval between two adjacent SAs is 40ms (milliseconds), and the SA occurs periodically according to this interval.
  • a large period can be defined as 1000ms, which is equivalent to Is (seconds).
  • a large period can be defined as 1024ms.
  • the scrambling sequence used by the SA whose retransmission times are changed may be modified correspondingly, for example, as shown in the figure.
  • the sending device sends the data packet through the D2D broadcast mode, and after receiving the data packet, the receiving device in the coverage of the D2D signal of the transmitting device can use the The four sets of sequences respectively descramble the CRC bits in the data packet, determine the sequence of successful descrambling as the scrambling sequence of the CRC bits, and determine the data packet according to the correspondence relationship shown in Table 2 and the determined scrambling sequence.
  • the number of retransmissions is prepared, and a buffer for each retransmission packet is prepared according to the number of retransmissions, and these different retransmission data packets corresponding to the same scheduling signaling are combined at the baseband.
  • the receiving device cannot obtain any control signaling about the format and retransmission information of the SA before receiving the SA. If the retransmitted information is placed in the SA packet, the signaling overhead needs to be increased, and Because the number of retransmissions of the SA cannot be known, the content of the SA can only be parsed one by one, and the probability of parsing failure is high. It is often necessary to try to obtain the retransmission packet of the SA multiple times. In the method shown in the embodiment of the present invention, it is not necessary to add an additional signaling indication in the SA, and the retransmission sequence of the CRC can implicitly indicate the number of retransmissions of the SA, which not only saves the number of retransmissions.
  • the signaling overhead, and the number of retransmissions of the entire SA packet is given before the SA content is demodulated, so that the receiving device of the SA can directly receive the subsequent data packet of the corresponding retransmission number and combine it to reduce the reception.
  • the number of attempts by the device to obtain the retransmission packet of the SA reduces the computational complexity and improves the demodulation performance of the SA.
  • the sending device determines the number of retransmissions of the scheduling signaling data packet by parsing the scrambling sequence of the CRC bits in the scheduling signaling data packet, and before demodulating the data packet of the scheduling signaling, The number of data packets that need to be combined and decoded and decoded is determined, thereby improving the accuracy of decoding, reducing the number of attempts of the receiving device, and improving the communication performance of the system.
  • the sending device determines the scrambling sequence corresponding to the scheduling signaling to be sent according to the second retransmission information indicating the number of retransmissions of the data packet of the scheduling signaling, and receives
  • the device only needs to pass the scrambling sequence to determine the number of retransmissions of the data packet, and solves the problem that the receiving device needs to decode each received data packet including scheduling signaling according to the scheduling signaling in the prior art.
  • the problem of reducing the resource consumption is achieved by receiving the data packet of the service data.
  • the wireless communication method provided by the embodiment of the present invention can also know how many can be obtained before demodulation.
  • the packet is combined and demodulated and decoded, thereby improving the correctness of the decoding, reducing the number of unnecessary attempts of the receiver, and improving the communication performance of the system.
  • FIG. 18 shows a device configuration diagram of a transmitting device according to another embodiment of the present invention.
  • the transmitting device may be a transmitting device in a D2D (Device to Device) device system.
  • the transmitting device may include: a processor 007 and a transmitter 008;
  • the processor 007 is configured to determine a corresponding scrambling sequence according to the communication parameter of the information to be sent, where the processor 007 is configured to: when the to-be-sent information is scheduling signaling, where the communication parameter is used to indicate retransmission If the number of retransmissions of the data packet is the same as the number of retransmissions of the data packet of the next scheduling signaling, the scrambling sequence is determined according to the third retransmission information, where the third retransmission information is used. Instructing the number of retransmissions of the data packet;
  • the processor 007 is configured to: when the information to be sent is scheduling signaling, the communication parameter is used to indicate retransmission information, and the number of retransmissions of the data packet is the same as the data packet of the next scheduling signaling. When the number of times of transmission is different, the scrambling sequence is determined according to the fourth retransmission information, where the fourth retransmission information is used to indicate the number of retransmissions of the data packet of the next scheduling signaling.
  • the sending device When determining the scrambling sequence, the sending device first acquires the number of retransmissions of the data packet of the next scheduling signaling, and determines whether the number of retransmissions of the data packet of the next scheduling signaling and the number of retransmissions of the data packet of the current scheduling signaling are If the two are the same, the sequence corresponding to the number of retransmissions of the data packet of the current scheduling signaling is determined as the scrambling sequence used by the data packet of the current scheduling signaling; if the two are different, The sequence corresponding to the number of retransmissions of the data packet of the next scheduling signaling is determined as the scrambling sequence used by the data packet of the current scheduling signaling.
  • SAr ⁇ SAn has the same number of retransmissions, both of which are 2 times, and the number of retransmissions of SA n+1 is 3 times, and SA ⁇ SA ⁇ is used.
  • the scrambling sequence is the second set of sequences in Table 2, and the scrambling sequence used by SA n is the third set of sequences in Table 3.
  • the processor 007 is configured to scramble a cyclic redundancy check CRC bit corresponding to the to-be-sent information according to the scrambling sequence to generate a scrambled CRC bit;
  • the processor 007 is configured to generate a data packet of the information to be sent, where the data packet includes the scrambled CRC bit;
  • the receiving device adds the scrambled CRC bits after the scheduling signaling to form uncoded information. Bit, encoding the uncoded information bits to generate a data packet of the scheduling signaling.
  • the processor 007 is configured to control the transmitter 008 to send the data packet to a receiving device, and the receiving device parses the scrambling sequence according to the received scrambled CRC bit, according to the The scrambling sequence determines the communication parameter, and performs receiving processing on each data packet sent by the sending device according to the communication parameter.
  • the sending device sends the data packet through the D2D broadcast mode, and after receiving the data packet, the receiving device in the coverage of the D2D signal of the transmitting device can use the The four sets of sequences respectively descramble the CRC bits in the data packet, determine that the sequence of successful descrambling is the scrambling sequence of the CRC bits, and obtain the scrambling sequence corresponding to the data packet of the previous scheduling signaling sent by the sending device; Determining whether the scrambling sequence corresponding to the data packet of the previous scheduling signaling is the same; if the judgment result is that the scrambling sequence is the same as the scrambling sequence corresponding to the data packet of the previous scheduling signaling, determining The scrambling sequence is a third retransmission information indicating the number of retransmissions of the data packet; if the result of the determination is that the scrambling sequence is different from the scrambling sequence corresponding to the data packet of the previous scheduling
  • the receiving device determines, according to the judgment result and the correspondence relationship shown in Table 2, the number of retransmissions of the data packet of the current scheduling signaling and the number of retransmissions of the data packet of the next scheduling signaling, and prepares the data packets for the two scheduling signaling.
  • the respective cache stores the data packets for the two scheduling signaling.
  • the receiving device determines that the number of retransmissions indicated by the scrambling sequence used by the SA of the received new scheduling signaling is the same as the number of retransmissions used by the actual SA, determining the SA of the next scheduling signaling to be received.
  • the number of retransmissions is the same as the number of retransmissions of the SA of the currently received scheduling signaling. If the receiving device determines that the number of retransmissions indicated by the scrambling sequence used by the SA of the current scheduling signaling is different from the number of retransmissions actually used, determining the number of retransmissions of the SA of the next scheduling signaling to be received.
  • the number of retransmissions of the SA that is currently received by the scheduling signaling is different; the receiving device determines, according to Table 2, the number of retransmissions of the SA of the current scheduling signaling and the number of retransmissions of the SA of the next scheduling signaling to be received, According to this, the SA of the new scheduling signaling and the SA of the next scheduling signaling are allocated, and the number of times the next scheduling signaling SA receives the combining is prepared in advance.
  • the receiving device cannot obtain any control signaling about the format and retransmission information of the SA before receiving the SA. If the retransmitted information is placed in the SA packet, the signaling overhead needs to be increased, and Because the number of retransmissions of the SA cannot be known, the content of the SA can only be parsed one by one, and the probability of parsing failure is high. It is often necessary to try to obtain the retransmission packet of the SA multiple times. In the method shown in the embodiment of the present invention, it is not necessary to add an additional signaling indication in the SA, and the scrambling sequence of the CRC can be used.
  • Implicitly indicating the number of retransmissions of the next SA to be received not only saving the signaling overhead indicating the number of retransmissions, but also giving the number of retransmissions of the entire SA packet before demodulating the SA content, thereby
  • the receiving device of the SA can directly receive the subsequent data packets of the corresponding retransmission times and combine them, thereby reducing the number of attempts by the receiving device to obtain the retransmission packet of the SA, reducing the computational complexity and improving the demodulation performance of the SA.
  • the sending device according to the embodiment of the present invention, is configured according to the number of retransmissions of the data packet corresponding to the scheduling signaling and the number of retransmissions of the data packet of the next scheduling signaling.
  • the number of retransmissions of the data packet determines the scrambling sequence; when the number of retransmissions of the data packet corresponding to the scheduling signaling is different from the number of retransmissions of the data packet of the next scheduling signaling, according to the data packet of the next scheduling signaling
  • the number of retransmissions determines the scrambling sequence, and the receiving device only needs to compare the number of retransmissions actually used by the current scheduling signaling with the scrambling sequence used by the current scheduling signaling to determine the number of retransmissions of the data packet of the next scheduling signaling.
  • the transmitting device may be a transmitting device in a D2D (Device to Device) device system.
  • the transmitting device may include: a processor 009 and a transmitter 010;
  • the processor 009 is configured to determine a corresponding scrambling sequence according to the communication parameter of the information to be sent, where the processor 009 is configured to: when the information to be sent is scheduling signaling, and the communication parameter is used to indicate And determining, by the fifth retransmission information, the scrambling sequence, where the fifth retransmission information is used to indicate a retransmission number of data packets of each service data corresponding to the scheduling signaling, or The fifth retransmission information is used to indicate the number of retransmissions of the first data packet in the data packet of the service data corresponding to the scheduling signaling; and the fifth retransmission information is used to indicate each of the scheduling signaling When the number of retransmissions of the data packet of the service data is the same, the number of retransmissions of the data packet of each service data corresponding to the scheduling signaling is the same.
  • scheduling signaling corresponds to a scheduling indication of data packets of several service data, for example, using four groups of 16-bit scrambling sequences respectively corresponding to four retransmission times as an example, scrambling used for scheduling signaling packets
  • the number of retransmissions of data packets of each service data corresponding to the scheduling signaling may be as shown in Table 2.
  • the number of retransmissions is 1.
  • the data packet of each service data corresponding to the scheduling signaling is sent only once, the number of retransmissions is 2, the data packet of each service data corresponding to the scheduling signaling is sent twice, and so on. .
  • the fifth retransmission information when used to indicate the number of retransmissions of data packets of each service data corresponding to the scheduling signaling, the data packets of the different service data corresponding to the scheduling signaling are The retransmission times are the same.
  • FIG. 9 a mapping diagram between the scheduling signaling and the service data, where one SA corresponds to n different service data packets, and if the number of retransmissions of each service data packet is 2,
  • the scrambling sequence used by the SA can be determined by the Table 2 query as the second set of sequences in Table 2.
  • the processor 009 is configured to scramble the cyclic redundancy check CRC bit corresponding to the to-be-sent information according to the scrambling sequence to generate a scrambled CRC bit;
  • the processor 009 is configured to generate a data packet of the to-be-sent information, where the data packet includes the scrambled CRC bit;
  • the receiving device adds the scrambled CRC bits to the scheduling signaling to form uncoded information bits, and encodes the uncoded information bits to generate a data packet of the scheduling signaling.
  • the processor 009 is configured to control the transmitter 010 to send the data packet to a receiving device, and the receiving device parses the scrambling sequence according to the received scrambled CRC bit, according to the The scrambling sequence determines the communication parameter, and performs receiving processing on each data packet sent by the sending device according to the communication parameter.
  • the sending device and the receiving device are terminal devices of the D2D system, and the sending device sends the data packet of the scheduling signaling by using a D2D broadcast manner, and the receiving device that is within the coverage of the D2D signal of the sending device receives the data packet of the scheduling signaling.
  • the four groups of sequences in Table 2 can be used to descramble the CRC bits in the data packet respectively, and the sequence of successful descrambling is determined as the scrambling sequence of the CRC bits, and according to the correspondence shown in the table and the determined addition.
  • the scrambling sequence determines the number of retransmissions of data packets of each service data corresponding to the scheduling signaling, and prepares a buffer for retransmission packets for each service data according to the number of retransmissions.
  • the fifth retransmission information may be used to indicate the number of retransmissions of the first data packet in the data packet of each service data corresponding to the scheduling signaling, and the fifth retransmission information is used to indicate each service corresponding to the scheduling signaling.
  • the processing mode when the transmitting device generates the data packet and the fifth retransmission information are used to indicate the number of retransmissions of the data packet of each service data corresponding to the scheduling signaling Similar, it will not be described here.
  • the receiving device After determining, by the CRC scrambling sequence, the communication parameter is the fifth retransmission information, the receiving device prepares a buffer for the first data packet in each service data according to only the number of retransmissions indicated by the fifth retransmission information.
  • the weight of the data packet of each service data corresponding to the scheduling signaling is The number of transmissions can be the same or different.
  • the sending device determines the scrambling sequence of the CRC bits of the scheduling signaling according to the number of retransmissions of the data packets of the service data corresponding to the scheduling signaling, so that the receiving device parses the CRC of the scheduling signaling.
  • the bit scrambling sequence can determine the number of retransmissions of the data packet of each service data corresponding to the scheduling signaling or the first service data packet in each service data packet, and does not need to add a dedicated letter in the content of the scheduling signaling. Therefore, the signaling overhead is saved.
  • the sending device determines the number of retransmissions of the data packet of the service data according to the scrambling sequence in the data packet of the scheduling signaling, and can prepare the resource of the data packet of each service data in advance, and directly merge the retransmitted data packets.
  • the computational complexity is reduced and the demodulation performance of each service data packet is improved.
  • the sending device determines the scrambling sequence by using the number of retransmissions of the data packets corresponding to the service data corresponding to the scheduling signaling, and the receiving device only needs to use the data packet of the scheduling signaling.
  • the scrambling sequence can determine the number of retransmissions of the data packets of the different service data corresponding to the scheduling signaling, and solves the problem that the prior art needs to use the signaling content included in the SA to indicate the number of retransmissions of the service data packet.
  • the signaling overhead in the SA is reduced, and the receiver knows the number of retransmissions of the service data behind the SA in advance, so that the subsequent data reception and merging are prepared in advance, the computational complexity is reduced, and the service data packets are improved. Demodulation performance.
  • the transmitting device may be a transmitting device in a D2D (Device to Device) device system.
  • the transmitting device may include: a processor 011 and a transmitter 012;
  • the processor 011 is configured to determine a corresponding scrambling sequence according to the communication parameter of the information to be sent, where the processor 011 is configured to: when the information to be sent is service data, and the communication parameter is used by Determining the scrambling sequence according to the sixth retransmission information, where the sixth retransmission information is used to indicate the number of retransmissions of the data packet;
  • the number of retransmissions of data packets of different service data between data packets of two adjacent scheduling signalings is the same.
  • the correspondence between the number of retransmissions of the data packet of the service data and the scrambling sequence used by the data packet of the service data may be as Table 2 shows.
  • the retransmission number of 1 indicates that the data packet of the service data is sent only once, the number of retransmissions is 2, the data packet of the service data is sent twice, and so on.
  • the processor 011 is configured to scramble the cyclic redundancy check CRC bit corresponding to the to-be-transmitted information according to the scrambling sequence to generate a scrambled CRC bit;
  • the processor 011 is configured to generate a data packet of the information to be sent, where the data packet includes the scrambled CRC bit;
  • the receiving device adds the scrambled CRC bits to the service data to form uncoded information bits, and encodes the uncoded information bits to generate a data packet of the service data.
  • the processor 011 is configured to control the transmitter 012 to send the data packet to a receiving device, and the receiving device parses the scrambling sequence according to the received scrambled CRC bit, according to the The scrambling sequence determines the communication parameter, and performs receiving processing on each data packet sent by the sending device according to the communication parameter.
  • the number of retransmissions of data packets of different service data between data packets of two adjacent scheduling signalings is the same.
  • a service data (DATA) transmission diagram in which a packet of n different service data between SA1 and SA2 is respectively DATA! ⁇ DATA n , and each DATA is retransmitted.
  • the number of times is 2, and the scrambling sequence used by each DATA corresponds to the second set of sequences in FIG.
  • the sending device sends the data packet of the service data by using the D2D broadcast mode, and the receiving device that is within the coverage of the D2D signal of the sending device receives the data packet, and can use the table.
  • the four sets of sequences in 2 respectively correspond to the CRC in the data packet.
  • the bit is descrambled, determining that the sequence of successful descrambling is a scrambling sequence of the CRC bit, and determining the number of retransmissions of the data packet of the service data according to the correspondence relationship shown in Table 2 and the determined scrambling sequence, and according to the The number of retransmissions is prepared for the buffering of each retransmission packet, and these different retransmission data packets corresponding to the same scheduling signaling are combined at the baseband.
  • the sending device determines, according to the number of retransmissions of the data packet of the service data, a scrambling sequence of the CRC bit of the data packet of the service data, so that the receiving device passes the CRC bit of the data packet of the service data.
  • the scrambling sequence can determine the number of retransmissions of the data packet of the service data, and does not need to add dedicated signaling in the content of the scheduling signaling, thereby saving signaling overhead.
  • the receiving device since the number of retransmissions of data packets of different service data between the data packets of two adjacent scheduling signaling is the same, the receiving device only needs to parse the data packet of one service data to determine other subsequent service data.
  • the number of retransmissions of the data packet so that the resources of the data packets of each service data can be prepared in advance, and the retransmitted data packets are directly merged, thereby reducing the computational complexity and improving the demodulation performance of each service data packet.
  • the sending device determines the scrambling sequence corresponding to the service data to be sent according to the sixth retransmission information indicating the number of retransmissions of the data packet of the service data, and the receiving device only
  • the number of retransmissions of the data packet of the service data needs to be determined by using the scrambling sequence, and the signaling overhead required to indicate the number of retransmissions of the service data packet by using the signaling content included in the SA in the prior art is solved.
  • the problem is that the signaling overhead in the SA is reduced, and the receiving device can know the number of retransmissions of the subsequent service data in advance after parsing a service data packet, so that it is convenient to prepare and receive the subsequent data in advance, thereby reducing the calculation.
  • the complexity improves the demodulation performance of each service data packet.
  • the transmitting device may be a transmitting device in a D2D (Device to Device) device system.
  • the transmitting device may include: a processor 013 and a transmitter 014;
  • the processor 013 is configured to determine a corresponding scrambling sequence according to the communication parameter of the information to be sent, where the processor 013 is configured to: when the information to be sent is service data, and the communication parameter is used to indicate retransmission And determining the scrambling sequence according to the seventh retransmission information, where the seventh retransmission information is used to indicate the number of retransmissions of the data packet of the at least one service data after the data packet.
  • the number of retransmissions of the subsequent at least one service data packet and the scrambling sequence used by the current service data data packet are taken as an example.
  • the correspondence between them can be as shown in Table 2.
  • the processor 013 is configured to scramble the cyclic redundancy check CRC bit corresponding to the to-be-sent information according to the scrambling sequence to generate a scrambled CRC bit.
  • the processor 013 is configured to generate a data packet of the information to be sent, where the data packet includes the scrambled CRC bit;
  • the receiving device adds the scrambled CRC bits to the service data to form uncoded information bits, and encodes the uncoded information bits to generate a data packet of the service data.
  • the processor 013 is configured to control the transmitter 014 to send the data packet to a receiving device, and the receiving device parses the scrambling sequence according to the received scrambled CRC bit, according to the The scrambling sequence determines the communication parameter, and performs receiving processing on each data packet sent by the sending device according to the communication parameter.
  • the sending device sends the data packet of the service data by using the D2D broadcast mode, and the receiving device that is within the coverage of the D2D signal of the sending device receives the data packet, and can use the table.
  • the four sets of sequences in 2 respectively descramble the CRC bits in the data packet, determine the sequence of successful descrambling as the scrambling sequence of the CRC bits, and query according to the correspondence relationship shown in Table 2 and the determined scrambling sequence.
  • the number of retransmissions of the data packet of at least one subsequent service data of the data packet where the number of retransmissions is 1, indicating that the data packet is transmitted only once. And receiving, according to the judgment result, a data packet of the subsequent at least one service data.
  • the sending device determines, according to the number of retransmissions of the data packet of the at least one service data after the data packet of the current service data, the scrambling sequence of the CRC bit of the data packet of the service data, so as to receive
  • the device can determine the number of retransmissions of the data packets of each service data subsequent to the data packet of the service data by parsing the scrambling sequence of the CRC bits of the data packet of the service data, and does not need to add a dedicated letter in the content of the scheduling signaling. Therefore, the signaling overhead is saved.
  • the instruction of the embodiment of the present invention can easily make an indication, thereby making The number of transmissions of data packets of each service data after each SA can be changed as needed, which improves the flexibility of the system.
  • the information to be sent is the scheduling signaling
  • the fifth retransmission information is used to indicate the data packet of each service data corresponding to the scheduling signaling.
  • the combination of the number of retransmission times of the first data packet, that is, the CRC scrambling sequence in one scheduling signaling indicates the number of retransmissions of the data packet of the first service data after the scheduling signaling, and the adjustment
  • the CRC scrambling sequence of the data packets of the respective service data corresponding to the degree signaling respectively indicates the number of retransmissions of the data packets of at least one service data after itself.
  • the sending device determines the current service to be sent by using the seventh retransmission information according to the number of retransmissions of the data packet of the at least one service data after the data packet indicating the current service data.
  • the scrambling sequence corresponding to the data the receiving device only needs to pass the scrambling sequence to determine the number of retransmissions of the data packet of the at least one service data after the data packet of the service data, and solves the need to use the SA in the prior art.
  • the signaling content indicates the problem of the number of retransmissions of the service data packet, reduces the signaling overhead in the SA, and enables the number of transmissions of each data packet behind each SA to be changed as needed, thereby improving the flexibility of the system.
  • the transmitting device may be a transmitting device in a D2D (Device to Device) device system.
  • the transmitting device may include: a processor 015 and a transmitter 016;
  • the processor 015 is configured to determine a corresponding scrambling sequence according to the communication parameter of the information to be sent, where the processor 015 is configured to: when the information to be sent is scheduling signaling, according to the synchronization corresponding to the sending device The identification of the signal determines the scrambling sequence.
  • the processor 015 is configured to determine the scrambling sequence according to an identifier of the synchronization signal and a correspondence between an identifier of the synchronization signal set in advance and the scrambling sequence.
  • each D2D device may be within the coverage of the base station or may be outside the coverage of the base station, and the D2D device in the coverage of the base station may directly synchronize with the base station, but outside the coverage of the base station.
  • some D2D devices can be used as synchronization source devices for transmitting synchronization signals, and the remaining D2D devices receive synchronization signals transmitted by the synchronization source devices and synchronize with them. If two devices performing D2D communication are synchronized with the same synchronization source device, the communication effect is optimal, and under normal circumstances, the non-synchronized source device can simultaneously receive synchronization signals sent by multiple synchronization source devices, and The synchronization source device with the strongest signal is synchronized.
  • the synchronization source device corresponding to the sending device and the receiving device may not be the same device, thereby affecting the quality of the D2D communication.
  • the sending device may indicate the synchronization source device corresponding to the sending device by using a scrambling sequence of the scheduling signaling, so that the receiving device receives the scrambling sequence of the scheduling signaling and the sending device. Synchronize to the same sync source device to improve communication quality.
  • the identifiers of the synchronization signals sent by each synchronization device are different, and one preset may be set.
  • a one-to-one correspondence between the scrambling sequence and the identifier of the synchronization signal, which is known to each D2D device, the transmitting device can identify and add the identifier of the synchronization signal according to the synchronization signal of the synchronization signal.
  • the correspondence between the scrambling sequences determines the scrambling sequence.
  • the processor 015 is configured to scramble the cyclic redundancy check CRC bit corresponding to the to-be-sent information according to the scrambling sequence to generate a scrambled CRC bit.
  • the processor 015 is configured to generate a data packet of the information to be sent, where the data packet includes the scrambled CRC bit;
  • the receiving device adds the scrambled CRC bits to the scheduling signaling to form uncoded information bits, and encodes the uncoded information bits to generate a data packet of the scheduling signaling.
  • the processor 015 is configured to control the transmitter 016 to send the data packet to a receiving device, where the receiving device parses the scrambling sequence according to the received scrambled CRC bit, according to the The scrambling sequence determines the communication parameter, and performs receiving processing on each data packet sent by the sending device according to the communication parameter.
  • the sending device and the receiving device are terminal devices of the D2D system, and the sending device sends the data packet of the scheduling signaling by using a D2D broadcast manner, and the receiving device that is within the coverage of the D2D signal of the sending device receives the data packet of the scheduling signaling.
  • the scrambling sequence corresponding to the identifier of each synchronization signal received by the receiving device is determined.
  • the receiving device may be configured according to the identifier of each received synchronization signal and the identifier of the scrambling sequence and the synchronization signal.
  • the correspondence relationship determines a scrambling sequence corresponding to the identifiers of the received synchronization signals, and the receiving device separately descrambles the CRC bits in the data packet by using the determined sequence, and determines that the sequence of successful descrambling is the data of the scheduling signaling. And a scrambling sequence of the CRC bits in the packet, and synchronizing with the transmitting device to the same synchronization source device according to the identifier of the synchronization signal corresponding to the scrambling sequence of the CRC bit.
  • the sending device determines the scrambling sequence corresponding to the scheduling signaling to be sent according to the identifier of the synchronization signal corresponding to the sending device, and the receiving device only needs to pass the scrambling sequence to determine
  • the synchronization source device of the transmitting device solves the problem that the demodulation performance is degraded due to different synchronization sources of the transceiver referenced by the communication in the prior art, thereby improving the demodulation performance of the receiver.
  • FIG. 23 shows a device configuration diagram of a transmitting device according to another embodiment of the present invention.
  • the transmitting device may be a transmitting device in a D2D (Device to Device) device system.
  • the transmitting device may include: a processor 017 and a transmitter 018;
  • the processor 017 is configured to determine a corresponding scrambling sequence according to the communication parameter of the information to be sent, where the processor 017 is configured to: when the information to be sent is scheduling signaling, according to the indication in the scheduling signaling
  • the identifier identifies the scrambling sequence, and the identifier indicated in the scheduling signaling is used to identify the identifier information of the data packet.
  • the processor 017 is configured to: when the data packet includes all the bit information of the identifier indicated in the scheduling signaling, determine the scrambling according to bit information at a specified position in the identifier of the sending device.
  • the processor 017 configured to: when the data packet includes partial bit information of the identifier indicated in the scheduling signaling, determine, according to remaining bit information in the identifier indicated in the scheduling signaling, Scrambling sequence.
  • the identification information of the data packet may be used to indicate to the receiving device whether the data packet is a data packet corresponding to the receiving device.
  • the identifier indicated in the scheduling signaling may be an identifier of the receiving device that receives the service data corresponding to the scheduling signaling, or may be another type of identifier, and only the identifier may indicate which device is the scheduling signaling.
  • the receiving device of the corresponding business data is sufficient.
  • the data packet of the scheduling signaling may include all the bit information of the identifier indicated in the scheduling signaling, or may only include part of the bit information of the identifier indicated in the scheduling signaling, and the remaining part of the bit information is hidden.
  • the data packet of the scheduling signaling includes all the bit information of the identifier indicated in the scheduling signaling, determining the scrambling sequence according to the bit information at the designated position in the identifier of the sending device;
  • J is determined according to the remaining bit information in the identifier indicated in the scheduling signaling.
  • the identifier indicated in the scheduling signaling is 8 bits
  • the scrambling sequence is 16 bits.
  • the last 2 bits in the identifier indicated by the scheduling signaling may correspond to four groups of scrambling sequences, which are used to indicate four different
  • the corresponding relationship is as shown in Table 3, where a and b respectively represent the second-to-last and last digits of the identifier indicated in the scheduling signaling, and the transmitting device may follow the indication indicated in the scheduling signaling.
  • the two lookup table 3 determines the scrambling sequence of the CRC bits of the scheduling signaling.
  • the 8-bit bit in the identifier indicated by the scheduling signaling may be completely included in the data packet of the scheduling signaling, and the last two bits correspond to the scrambling sequence; or the first 6 of the identifiers indicated in the scheduling signaling
  • the bit bits are included in the data packet of the scheduling signal, corresponding to the last 2 bits of the scrambling sequence.
  • the processor 017 is configured to use a cyclic redundancy corresponding to the to-be-sent information according to the scrambling sequence.
  • the remainder checks the CRC bits for scrambling to generate the scrambled CRC bits;
  • the processor 017 is configured to generate a data packet of the information to be sent, where the data packet includes the scrambled CRC bit;
  • the receiving device adds the scrambled CRC bits to the scheduling signaling to form uncoded information bits, and encodes the uncoded information bits to generate a data packet of the scheduling signaling.
  • the processor 017 is configured to control the transmitter 018 to send the data packet to a receiving device, and the receiving device parses the scrambling sequence according to the received scrambled CRC bit, according to the The scrambling sequence determines the communication parameter, and performs receiving processing on each data packet sent by the sending device according to the communication parameter.
  • the sending device and the receiving device are terminal devices of the D2D system, and the sending device sends the data packet of the scheduling signaling by using a D2D broadcast manner, and the receiving device that is within the coverage of the D2D signal of the sending device receives the data packet of the scheduling signaling. And determining, according to the parsed scrambling sequence, the identifier indicated in the scheduling signaling, and determining whether it is the destination device of the data packet of the scheduling signaling, and if yes, parsing the content of the scheduling signaling and receiving the identifier The data packet of each service data corresponding to the signaling is scheduled, otherwise the data packet of the scheduling signaling is discarded.
  • the sending device determines the scrambling sequence corresponding to the scheduling signaling to be sent according to the identifier information of the data packet used to represent the scheduling signaling, and the receiving device only needs to pass the scrambling.
  • the sequence can determine whether the sending device is the destination device of the data packet of the scheduling signaling, and solves the problem that the receiving device needs to decode each received data packet including scheduling signaling according to the scheduling signaling.
  • the problem of receiving data packets of service data achieves the effect of reducing resource consumption and improving system communication efficiency.
  • FIG. 24 shows a device configuration diagram of a receiving device according to an embodiment of the present invention.
  • the receiving device may be a receiving device in a D2D (Device to Device) device system.
  • the receiving device can include:
  • the receiving module 1001 is configured to receive a data packet sent by the sending device, where the data packet includes a scrambled cyclic redundancy check CRC bit.
  • the descrambling module 1002 is configured to parse the scrambling sequence according to the scrambled CRC bits, and the communication parameter determining module 1003 is configured to determine, according to the scrambling sequence, a communication parameter of the information included in the data packet;
  • the processing module 1004 is configured to send each data packet to the sending device according to the communication parameter. Perform receiving processing.
  • the communication parameter is used to indicate retransmission information, a synchronization signal corresponding to the sending device, or identification information of the data packet.
  • the receiving device acquires a synchronization signal corresponding to the retransmission information, the sending device, or the data packet by parsing the CRC scrambling sequence of the data packet after receiving the data packet.
  • the communication parameters of the device, and receiving and processing each data packet sent by the sending device according to the communication parameter, and the receiving device only needs to parse the CRC scrambling sequence of each data packet when receiving the data packet to determine the retransmission information of the data packet,
  • the synchronization information or the identification information of the data packet has low computational complexity, and solves the problem that the receiving device needs to decode each received data packet including the scheduling signaling and receive the service data according to the content of the scheduling signaling in the prior art.
  • the problem of the package is to reduce the resource consumption and improve the efficiency of system communication.
  • FIG. 25 there is shown a device configuration diagram of a receiving device according to another embodiment of the present invention.
  • the receiving device may be a receiving device in a D2D (Device to Device) device system.
  • the receiving device can include:
  • the receiving module 1101 is configured to receive a data packet sent by the sending device, where the data packet includes a scrambled cyclic redundancy check CRC bit.
  • the information contained in the data packet may be for scheduling signaling.
  • the descrambling module 1102 is configured to parse the scrambling sequence according to the scrambled CRC bits; the receiving device may separately descramble the CRC bits in the data packet by using two sets of sequences in Table 1, to determine a sequence of successful descrambling Is the scrambling sequence for the CRC bit.
  • a communication parameter determining module 1103, configured to determine, according to the scrambling sequence, a communication parameter of information included in the data packet;
  • the processing module 1104 is configured to perform receiving processing on each data packet sent by the sending device according to the communication parameter.
  • the processing module 1104 includes:
  • the first determining unit 1104a is configured to: when the information included in the data packet is scheduling signaling, where the communication parameter is used to indicate whether the data packet is the first retransmission information of the retransmitted data packet, Determining, by the first retransmission information, whether the data packet is a retransmission data packet;
  • a first receiving unit H04b configured to receive the number according to a determination result of the first determining unit According to the package.
  • the receiving device may determine, according to the correspondence relationship shown in Table 1 and the determined scrambling sequence, whether the data packet is a retransmission or a new transmission.
  • the cache data corresponding to the same scheduling signaling of the previous or multiple times of receiving the packet needs to be saved, and a new buffer for the next retransmission packet is prepared, and these are corresponding at the baseband.
  • the different retransmission data of the same scheduling signaling is combined, and then the combined data packet is decoded once, without having to decode each retransmission packet separately, reducing the number of decodings and improving the translation.
  • the performance of the code if the data packet is a new transport packet, the baseband data of the data packet of the previous scheduling signaling in the physical layer cache may be cleared, and the buffer for receiving the new transport packet is prepared.
  • the receiving device can determine whether the data packet of the scheduling signaling is a retransmitted data packet or a newly transmitted data packet by parsing a scrambling sequence of the CRC bits of the scheduling signaling, so that the demodulation is prepared in advance. Resources and consolidation methods to improve reception efficiency.
  • the receiving device may also combine the data packet with other data packets of the same scheduling signaling, and perform decoding only on the combined multiple data packets. For users with limited coverage, Reduce the number of decoding and improve decoding performance.
  • the receiving device determines whether the data packet is a retransmitted data packet according to a CRC scrambling sequence in a data packet of the scheduling signaling, and can prepare resources for demodulation and merged in advance.
  • the method solves the problem that the receiving device needs to decode each received data packet including scheduling signaling and receive the data packet according to the content of the scheduling signaling in the prior art, and reduces the number of users with limited coverage. The number of decoding attempts is achieved to reduce resource consumption and improve system communication efficiency.
  • FIG. 26 there is shown a device configuration diagram of a receiving device according to another embodiment of the present invention.
  • the receiving device may be a receiving device in a D2D (Device to Device) device system.
  • the receiving device can include:
  • the receiving module 1201 is configured to receive a data packet sent by the sending device, where the data packet includes a scrambled cyclic redundancy check CRC bit;
  • the information contained in the data packet may be for scheduling signaling.
  • the descrambling module 1202 is configured to parse the scrambling sequence according to the scrambled CRC bits.
  • the transmitting device and the receiving device are terminal devices of the D2D system, and the receiving device may separately use the four sets of sequences in Table 2 to respectively perform data pairing.
  • the CRC bit in the packet is descrambled to determine the order of successful descrambling Listed as a scrambling sequence for the CRC bits.
  • the communication parameter determining module 1203 is configured to determine, according to the scrambling sequence, a communication parameter of information included in the data packet;
  • the processing module 1204 is configured to perform receiving processing on each data packet sent by the sending device according to the communication parameter.
  • the processing module 1204 is configured to: when the information included in the data packet is scheduling signaling, where the communication parameter is the second retransmission information used to indicate the number of retransmissions of the data packet, according to the data The number of retransmissions of the packet receives the data packet.
  • the number of retransmissions of the data packets of each scheduling signaling is the same in a predefined period.
  • the number of retransmissions of each data packet carrying different scheduling signaling is the same in a large period, for example, a SA (Scheduling Assignment) transmission diagram as shown in FIG.
  • the SA is a packet of scheduling signaling, wherein the number of retransmissions of SA ⁇ SAn is the same, both are 2, and the scrambling sequence used by each SA corresponds to the second sequence in Table 2.
  • the so-called large period refers to a period in which the interval in which the SA occurs in a periodic manner is larger.
  • the interval between two adjacent SAs is 40ms (milliseconds), and the SA occurs periodically according to this interval.
  • a large period can be defined as 1000ms, which is equivalent to Is (seconds).
  • a large period can be defined as 1024ms.
  • the receiving device may determine the number of retransmissions of the data packet according to the correspondence relationship shown in Table 2 and the determined scrambling sequence, and prepare to be used according to the number of retransmission times.
  • Each retransmission packet is buffered, and these different retransmission data packets corresponding to the same scheduling signaling are combined at the baseband. For example, if it is determined that the number of retransmissions of a new SA received is 2, a buffer for 2 packets is prepared for the SA, and if the number of retransmissions of the next new SA is determined to be 3, the next is An SA is ready for caching of 3 packets.
  • the receiving device cannot obtain any control signaling about the format and retransmission information of the SA before receiving the SA. If the retransmitted information is placed in the SA packet, the signaling overhead needs to be increased, and Because the number of retransmissions of the SA cannot be known, the content of the SA can only be parsed one by one, and the probability of parsing failure is high. It is often necessary to try to obtain the retransmission packet of the SA multiple times. In the method shown in the embodiment of the present invention, it is not necessary to add an additional signaling indication in the SA, and the retransmission sequence of the CRC can implicitly indicate the number of retransmissions of the SA, which not only saves the number of retransmissions.
  • the signaling overhead, and the number of retransmissions of the entire SA packet is given before the SA content is demodulated, so that the receiving device of the SA can directly receive the subsequent data packet of the corresponding retransmission number and combine it to reduce the reception.
  • the receiving and receiving device is configured to pass the over-resolution analysis and the dispatching degree information signaling packet in the data packet of the CCRRCC bit.
  • the scrambling sequence sequence is used to determine the number of times of the retransmission of the data packet of the scheduling data signaling packet, and demodulating and adjusting the scheduling signal signaling Data of the data package
  • the present invention provides a method for providing and receiving a receiving and receiving device, and the data data of the dispatching and dispatching signaling signal is analyzed by over-analysis.
  • the CCRRCC plus scrambling sequence sequence used by the packet determines the number of times of retransmission times used for indicating the data packet of the scheduling signal signaling order.
  • the second two-way retransmission message information, the solution is resolved.
  • the intermediate receiving and receiving equipment needs to be received for each of the received ones.
  • the packet includes a number 1100 data packet containing the scheduling degree signaling signal, and the data is decompressed by the packet, and the received content data is received and received according to the internal content of the data transmission scheduling signaling.
  • the data can be reduced to reduce the consumption of resources of less resources.
  • the present invention provides a practical example.
  • the method of wireless communication without communication is provided, and the receiving and receiving equipment is ready for return. It may be known that before the demodulation and modulation, it is known that more or less packets will be merged and demodulated, decoded, decoded, and thus It can improve the correctness and correctness of the high-translation decoding code, and reduce the number of trials and attempts that are not necessary for the receiving and receiving machine, and raises the system system.
  • the communication performance can be. .
  • the receiving and receiving device may be a receiving and receiving device in the system system of the DD22DD ((DDeevviiccee ttoo DDeevviiccee) device).
  • the receiving and receiving device may be included in the package:
  • Receiving the receiving module module 11330011, and using the data packet for sending and receiving the sending and receiving device, and the packet in the data packet includes the adding After the disturbance, the cyclic loop redundancy redundant calibration check CCRRCC bitbit;
  • the data packet is a data packet for the scheduling degree signaling, and the CCRRCC bit-intercept for the scheduling signaling is added and harassed.
  • the scrambled sequence sequence is prepared by the transmitting and transmitting device according to the number of times of retransmission according to the scheduling signal or the next one of the scheduling signals The number of times of repeated transmissions is definitely fixed. . Please refer to Figure 66 for the corresponding implementation example of the application method. Please refer to Figure 66 for the corresponding implementation example of the application. Let me describe it again. .
  • the standby and receiving and receiving devices are prepared as the terminal devices of the DD22DD system.
  • the receiving and receiving devices can be used to make the four or four of the use table 22
  • the group sequence sequence column respectively performs the de-interference on the CCRRCC bitwise in the log data packet, and determines that the sequence sequence of the solution to the successful work is listed as the CCRRCC. Bibit's plus scrambling sequence sequence. .
  • the communication parameter parameter number determines the fixed mode module block 11330033, and is used for determining, according to the added scrambling sequence sequence according to the description, that the content of the packet in the packet includes Number of communication parameters of the information information;
  • the second second sequence sequence obtains the fetch unit element 11330033aa, and is used for the time when the packet information included in the packet data packet is included in the packet data packet ,, Acquiring a scrambling sequence of the data packet of the previous scheduling signaling sent by the sending device; the second determining unit I303b is configured to determine whether the scrambling sequence of the data packet of the scrambling sequence and the previous scheduling signaling is the same;
  • the seventh determining unit 1303c is configured to determine, if the result of the scrambling sequence is the same as the scrambling sequence of the data packet of the previous scheduling signaling, determining that the scrambling sequence is used to indicate the data packet.
  • the eighth determining unit 1303d is configured to: if the result of the determination is that the scrambling sequence is different from the scrambling sequence of the data packet of the previous scheduling signaling, determine that the scrambling sequence is used to indicate the next scheduling signaling.
  • the receiving device determines the number of retransmissions of the data packet of the current scheduling signaling and the number of retransmissions of the data packet of the next scheduling signaling according to the judgment result and the correspondence relationship shown in Table 2.
  • the receiving device determines that the number of retransmissions indicated by the scrambling sequence used by the SA of the received new scheduling signaling is the same as the number of retransmissions used by the actual SA, determining the SA of the next scheduling signaling to be received.
  • the number of retransmissions is the same as the number of retransmissions of the SA of the currently received scheduling signaling. If the receiving device determines that the number of retransmissions indicated by the scrambling sequence used by the SA of the current scheduling signaling is different from the number of retransmissions actually used, determining the number of retransmissions of the SA of the next scheduling signaling to be received.
  • the number of retransmissions of the SA that is currently received by the scheduling signaling is different; the receiving device determines the number of retransmissions of the SA of the current scheduling signaling and the number of retransmissions of the SA of the next scheduling signaling to be received according to Table 2.
  • the processing module 1304 is configured to perform receiving processing on each data packet sent by the sending device according to the communication parameter.
  • the receiving device prepares a buffer for the current data packet and the next data packet of the scheduling signaling to be received according to the determined communication parameter, and receives the merged corresponding retransmission data packet.
  • the receiving device may determine, according to Table 2, the number of retransmissions of the SA of the current scheduling signaling and the number of retransmissions of the SA of the next scheduling signaling to be received, and accordingly, the SA of the new scheduling signaling and The SA of the next scheduling signaling allocates a buffer, and prepares the next scheduling signaling SA to receive the number of merges in advance.
  • the receiving device cannot obtain any control signaling about the format and retransmission information of the SA before receiving the SA. If the retransmitted information is placed in the SA packet, the signaling overhead needs to be increased, and Because the number of retransmissions of the SA cannot be known, the content of the SA can only be parsed one by one, and the probability of parsing failure is high. It is often necessary to try to obtain the retransmission packet of the SA multiple times.
  • the additional signaling indication is not required in the SA, and the retransmission sequence of the next SA to be received can be implicitly indicated by the scrambling sequence of the CRC, which not only saves signaling indicating the number of retransmissions.
  • the overhead, and the number of retransmissions of the entire SA data packet is given before the SA content is demodulated, so that the receiving device of the SA can directly receive the subsequent data packets of the corresponding retransmission times and combine them to reduce the receiving device.
  • the number of attempts of the SA to retransmit the packet reduces the computational complexity and improves the demodulation performance of the SA.
  • the receiving device determines the number of retransmissions of the data packet and the number of retransmissions of the data packet of the next scheduling signaling according to the CRC scrambling sequence in the data packet of the current scheduling signaling.
  • the receiving device only needs to compare the number of retransmissions actually used by the current scheduling signaling with the scrambling sequence used by the current scheduling signaling to determine the number of retransmissions of the data packet of the next scheduling signaling, thereby reducing the acquisition of the next one.
  • the number of attempts of scheduling signaling solves the problem that the receiving device needs to decode each received data packet including scheduling signaling and receive the data packet of the service data according to the content of the scheduling signaling in the prior art, thereby reducing resources.
  • the receiving device may be a receiving device in a D2D (Device to Device) device system.
  • the receiving device can include:
  • the receiving module 1401 is configured to receive a data packet sent by the sending device, where the data packet includes a scrambled cyclic redundancy check CRC bit;
  • the data packet is a data packet for scheduling signaling, and the scrambling sequence for scrambling the CRC bits in the data packet is determined by the transmitting device according to the number of retransmissions of the data packets of the respective service data corresponding to the scheduling signaling.
  • the sending device to generate the data packet refer to the steps in the embodiment corresponding to FIG. 8 , and details are not described herein again.
  • the descrambling module 1402 is configured to parse the scrambling sequence according to the scrambled CRC bits.
  • the transmitting device and the receiving device are terminal devices of the D2D system, and the receiving device may separately use the four sets of sequences in Table 2 to respectively perform data pairing.
  • the CRC bit in the packet is descrambled, and the sequence in which the descrambling is successful is determined as the scrambling sequence of the CRC bit.
  • a communication parameter determining module 1403, configured to determine, according to the scrambling sequence, a communication parameter of information included in the data packet;
  • the receiving device may determine, according to the correspondence relationship shown in Table 2 and the determined scrambling sequence, the number of retransmissions of data packets of each service data corresponding to the scheduling signaling.
  • the processing module 1404 is configured to perform receiving processing on each data packet sent by the sending device according to the communication parameter.
  • the processing module 1404 is configured to: when the information included in the data packet is scheduling signaling, and when the communication parameter is the fifth retransmission information, receive the service corresponding to the scheduling signaling according to the fifth retransmission information. a data packet of the data; the fifth retransmission information is used to indicate a number of retransmissions of data packets of each service data corresponding to the scheduling signaling, or the fifth retransmission information is used to indicate the scheduling signaling The number of retransmissions of the first data packet in the data packet of the corresponding service data; when the fifth retransmission information is used to indicate the number of retransmissions of the data packet of each service data corresponding to the scheduling signaling, The number of retransmissions of the data packets of each service data corresponding to the scheduling signaling is the same.
  • the receiving device may prepare a buffer for the retransmission packet of each service data according to the number of retransmissions, or prepare a buffer for the retransmission packet of the first service data in each service data, and directly receive the corresponding service data. Retransfer packages and merge.
  • the sending device determines the scrambling sequence of the CRC bits of the scheduling signaling according to the service data corresponding to the scheduling signaling or the number of retransmissions of the data packet of the first service data in each service data.
  • the receiving device can determine the number of retransmissions of the data packet of each service data corresponding to the scheduling signaling or the first service data of each service data by parsing the scrambling sequence of the CRC bits of the scheduling signaling, and does not need to be scheduled. Special signaling is added to the content of the signaling, which saves signaling overhead.
  • the sending device determines the number of retransmissions of the data packet of the service data according to the scrambling sequence in the data packet of the scheduling signaling, and can prepare the resource of the data packet of each service data in advance, and directly merge the retransmitted data packets.
  • the computational complexity is reduced and the demodulation performance of each service data packet is improved.
  • the receiving device determines, by using a CRC scrambling sequence of a data packet of the scheduling signaling, each service data corresponding to the scheduling signaling or a data packet of the first service data in each service data.
  • the number of retransmissions solves the problem that the prior art needs to use the signaling content included in the SA to indicate the number of retransmissions of the service data packet, reduces the signaling overhead in the SA, and makes the receiver know the SA behind it in advance.
  • the number of retransmissions of service data facilitates the preparation and merging of subsequent data in advance, which reduces the computational complexity and improves the demodulation performance of each service data packet. Referring to FIG.
  • the receiving device may be a receiving device in a D2D (Device to Device) device system.
  • the receiving device can include:
  • the receiving module 1501 is configured to receive a data packet sent by the sending device, where the data packet includes a scrambled cyclic redundancy check CRC bit;
  • the data packet is a data packet of the service data, and the number of retransmissions of the data packet of different service data between the data packets of two adjacent scheduling signalings is the same.
  • the sending device to generate the data packet refer to the steps in the embodiment corresponding to FIG. 10, and details are not described herein again.
  • the descrambling module 1502 is configured to parse the scrambling sequence according to the scrambled CRC bits.
  • the transmitting device and the receiving device are terminal devices of the D2D system, and the receiving device may separately use the four sets of sequences in Table 2 to pair the data.
  • the CRC bit in the packet is descrambled, and the sequence in which the descrambling is successful is determined as the scrambling sequence of the CRC bit.
  • a communication parameter determining module 1503 configured to determine, according to the scrambling sequence, a communication parameter of information included in the data packet;
  • the communication parameter is sixth retransmission information indicating the number of retransmissions of the data packet, and the receiving device can determine the number of retransmissions of the data packet of the service data according to the correspondence relationship shown in Table 2 and the determined scrambling sequence.
  • the processing module 1504 is configured to perform receiving processing on each data packet sent by the sending device according to the communication parameter.
  • the processing module 1504 is configured to: when the information to be sent is service data, where the communication parameter is the sixth retransmission information used to indicate the number of retransmissions of the data packet, according to the retransmission of the data packet The number of times of receiving the data packet including the service data is the same, wherein the number of retransmissions of the data packet of different service data between the data packets of two adjacent scheduling signalings is the same.
  • the receiving device can prepare a buffer for each retransmission packet according to the number of retransmissions, and combine the different retransmission data packets corresponding to the same scheduling signaling at the baseband.
  • the number of retransmissions of data packets of different service data between data packets of two adjacent scheduling signalings is the same.
  • a service data (DATA) transmission diagram where SA1 and SA2 contain n different service data packets, respectively DATA! ⁇ DATA n , each DATA retransmission The number of times is 2, and the scrambling sequence used by each DATA corresponds to the second set of sequences in FIG.
  • the sending device determines, according to the number of retransmissions of the data packet of the service data, a scrambling sequence of the CRC bit of the data packet of the service data, so that the receiving device passes the CRC bit of the data packet of the service data.
  • the scrambling sequence can determine the number of retransmissions of the data packet of the service data, and does not need to add dedicated signaling in the content of the scheduling instruction, thereby saving signaling overhead.
  • the receiving device Since the number of retransmissions of data packets of different service data between the data packets of two adjacent scheduling signaling is the same, the receiving device only needs to parse the data packet of one service data to determine the data of the subsequent other service data.
  • the number of retransmissions of the packet can prepare the resources of the data packets of each service data in advance, and directly merge the retransmitted data packets, thereby reducing the computational complexity and improving the demodulation performance of each service data packet.
  • the receiving device determines the sixth retransmission information for indicating the number of retransmissions of the data packet of the service data by using the CRC scrambling sequence corresponding to the data packet of the service data, and solves the problem.
  • the signaling content included in the SA is used to indicate that the signaling overhead caused by the number of retransmissions of the service data packet is large, the signaling overhead in the SA is reduced, and the receiving device is parsing a service data packet. After that, the number of retransmissions of subsequent service data can be known in advance, and it is convenient to prepare and receive subsequent data in advance, which reduces computational complexity and improves demodulation performance of each service data packet.
  • FIG. 30 there is shown a device configuration diagram of a receiving device according to another embodiment of the present invention.
  • the receiving device may be a receiving device in a D2D (Device to Device) device system.
  • the receiving device can include:
  • the receiving module 1601 is configured to receive a data packet sent by the sending device, where the data packet includes a scrambled cyclic redundancy check CRC bit.
  • the data packet is a data packet of service data, and the CRC scrambling sequence of the data packet is determined by the transmitting device according to the number of retransmissions of the data packet of at least one service data after the monthly data packet.
  • the specific method for generating the data packet refer to the steps in the embodiment corresponding to FIG. 12, and details are not described herein again.
  • the descrambling module 1602 is configured to parse the scrambling sequence according to the scrambled CRC bits.
  • the transmitting device and the receiving device are terminal devices of the D2D system, and the receiving device may separately use the four sets of sequences in Table 2
  • the CRC bit in the packet is descrambled, and the sequence in which the descrambling is successful is determined as the scrambling sequence of the CRC bit.
  • the communication parameter determining module 1603 is configured to determine, according to the scrambling sequence, a communication parameter of information included in the data packet;
  • the communication parameter is a seventh retransmission information indicating whether the data packet of the at least one service data after the data packet of the service data is a retransmission data packet; the receiving device may according to the correspondence relationship shown in Table 2 and the determined addition
  • the scrambling sequence queries the number of retransmissions of the data packet of the subsequent at least one service data of the data packet.
  • the processing module 1604 is configured to perform receiving processing on each data packet sent by the sending device according to the communication parameter.
  • the processing module 1604 is configured to: when the to-be-sent information is service data, where the communication parameter is a seventh retransmission information used to indicate a retransmission number of data packets of at least one service data after the data packet And receiving, according to the number of retransmissions of the data packet of the at least one service data after the data packet, the data packet of the at least one service data.
  • the receiving device may prepare a method of buffering and merging in advance according to the number of retransmissions of the data packet of the at least one service data subsequent to the data packet.
  • the sending device determines, according to the number of retransmissions of the data packet of the at least one service data after the data packet of the current service data, the scrambling sequence of the CRC bit of the data packet of the service data, so as to receive
  • the device can determine the number of retransmissions of the data packets of each service data subsequent to the data packet of the service data by parsing the scrambling sequence of the CRC bits of the data packet of the service data, and does not need to add dedicated signaling in the content of the scheduling instruction. , saving signaling overhead.
  • the instruction of the embodiment of the present invention can easily make an indication, thereby making The number of transmissions of data packets of each service data after each SA can be changed as needed, which improves the flexibility of the system.
  • the information to be sent is the scheduling signaling
  • the fifth retransmission information is used to indicate the data of each service data corresponding to the scheduling signaling.
  • the scheme of the number of retransmissions of the first data packet in the packet is combined, that is, the CRC scrambling sequence in one scheduling signaling indicates the number of retransmissions of the data packet of the first service data after the scheduling signaling, and the scheduling The CRC scrambling sequence of the data packets of the respective service data corresponding to the signaling respectively indicates the number of retransmissions of the data packets of at least one service data after itself.
  • the receiving device determines the number of retransmissions of data packets of at least one service data after the data packet of the current service data according to the CRC scrambling sequence of the data packet of the current service data, and solves the problem.
  • the signaling content included in the SA is used to indicate the number of retransmissions of the service data packet, the signaling overhead in the SA is reduced, and the number of transmissions of each data packet behind each SA can be as needed. And change, which increases the flexibility of the system.
  • FIG. 31 shows a device configuration diagram of a receiving device according to another embodiment of the present invention.
  • the receiving device may be a receiving device in a D2D (Device to Device) device system. Ready.
  • the receiving device can include:
  • the receiving module 1701 is configured to receive a data packet sent by the sending device, where the data packet includes a scrambled cyclic redundancy check CRC bit;
  • the data packet is a data packet for scheduling signaling, and the CRC scrambling sequence of the data packet is determined by the transmitting device according to the identifier of its own corresponding synchronization signal.
  • the sending device to generate the data packet refer to the steps in the embodiment corresponding to FIG. 13 , and details are not described herein again.
  • a descrambling module 1702 configured to parse a scrambling sequence according to the scrambled CRC bits
  • a communication parameter determining module 1703 configured to determine, according to the scrambling sequence, a communication parameter of information included in the data packet
  • the communication parameter determining module 1703 is configured to determine an identifier of the synchronization signal according to the scrambling sequence and a correspondence between the identifier of the synchronization signal and the scrambling sequence set in advance.
  • the receiving device may first determine a scrambling sequence corresponding to the identifier of each synchronization signal received by the receiving device. Specifically, the receiving device may according to each received synchronization. The identifier of the signal and the correspondence between the scrambling sequence and the identifier of the synchronization signal determine a scrambling sequence corresponding to the identifiers of the received synchronization signals, and the receiving device respectively solves the CRC bits in the data packet by using the determined sequence. The sequence of the CRC bits in the data packet of the scheduling signaling is determined by the sequence of the descrambling success. The identifier of the synchronization signal corresponding to the scrambling sequence of the CRC bits in the data packet of the scheduling signaling is the identifier of the synchronization signal corresponding to the transmitting device.
  • the processing module 1704 is configured to perform receiving processing on each data packet sent by the sending device according to the communication parameter.
  • the processing module 1704 includes:
  • the synchronization unit 1704a is configured to: when the information to be sent is scheduling signaling, where the communication parameter is used to indicate the identifier of the synchronization signal corresponding to the sending device, the synchronization device corresponding to the identifier of the synchronization signal performs signal synchronization. ;
  • the second receiving unit 1704b is configured to receive, after the synchronization unit 1704a completes synchronization, each data packet that is subsequently sent by the sending device.
  • the receiving device synchronizes with the transmitting device according to the identifier of the synchronization signal corresponding to the scrambling sequence of the CRC bit to the same synchronization source device, and receives each data packet subsequently sent by the transmitting device after the synchronization is completed.
  • the receiving device parses the CRC in the scheduling signaling.
  • the scrambling sequence determines the identifier of the synchronization signal corresponding to the sending device, and synchronizes with the sending device to the same synchronization source device according to the identifier of the synchronization signal, which solves the solution caused by different synchronization sources of the transceiver reference in the prior art.
  • the problem of degraded performance is adjusted, thereby improving the demodulation performance of the receiver.
  • FIG. 32 shows a device configuration diagram of a receiving device according to another embodiment of the present invention.
  • the receiving device may be a receiving device in a D2D (Device to Device) device system.
  • the receiving device can include:
  • the receiving module 1801 is configured to receive a data packet sent by the sending device, where the data packet includes a scrambled cyclic redundancy check CRC bit.
  • the data packet is a data packet of the scheduling instruction, and the sending device determines the scrambling sequence of the data packet according to the identifier indicated in the scheduling instruction.
  • the sending device determines the scrambling sequence of the data packet according to the identifier indicated in the scheduling instruction.
  • the descrambling module 1802 is configured to parse the scrambling sequence according to the scrambled CRC bits.
  • the transmitting device and the receiving device are terminal devices of the D2D system, and the receiving device may separately use the two sets of sequences in Table 3 to pair the data.
  • the CRC bit in the packet is descrambled, and the sequence in which the descrambling is successful is determined as the scrambling sequence of the CRC bit.
  • the communication parameter determining module 1803 is configured to determine, according to the scrambling sequence, a communication parameter of information included in the data packet;
  • the identifier indicated in the scheduling signaling is used to identify the identifier information of the data packet.
  • the receiving device may determine the identifier indicated in the scheduling signaling according to the parsed scrambling sequence and the correspondence between the scrambling sequence shown in Table 3 and the identifier indicated in the scheduling signaling.
  • the processing module 1804 is configured to perform receiving processing on each data packet sent by the sending device according to the communication parameter.
  • the processing module 1804 is configured to: when the information to be sent is scheduling signaling, where the communication parameter is an identifier indicated by the scheduling signaling, receive the sending device according to the identifier indicated in the scheduling signaling Each of the subsequent transmissions includes a data packet with scheduling signaling, and the identifier indicated in the scheduling signaling is used to identify the identification information of the data packet.
  • the identifier information of the data packet may be used to indicate, by the receiving device, whether the data packet is a data packet corresponding to the receiving device. If the receiving device determines that the data packet is a data packet corresponding to the receiving device, decoding the data packet and the subsequent steps; if the receiving device determines that the data packet is not the data packet corresponding to the receiving device, Packets are dropped.
  • the receiving device provided by the embodiment of the present invention determines a corresponding scrambling sequence by parsing a data packet of a scheduling instruction, and determines identification information of the data packet according to the determined scrambling sequence, according to the identification information of the data packet.
  • FIG. 33 shows a device configuration diagram of a receiving device according to an embodiment of the present invention.
  • the receiving device may be a receiving device in a D2D (Device to Device) device system.
  • the receiving device may include: a receiver 019 and a processor 020;
  • the receiver 019 is configured to receive a data packet sent by the sending device, where the data packet includes a scrambled cyclic redundancy check CRC bit;
  • the processor 020 is configured to parse a scrambling sequence according to the scrambled CRC bits, where the processor 020 is configured to determine, according to the scrambling sequence, a communication parameter of information included in the data packet;
  • the processor 020 is configured to control the receiving 019 to perform receiving processing on each data packet sent by the sending device according to the communication parameter.
  • the communication parameter is used to indicate retransmission information, a synchronization signal corresponding to the sending device, or identification information of the data packet.
  • the receiving device acquires a synchronization signal corresponding to the retransmission information, the sending device, or the data packet by parsing the CRC scrambling sequence of the data packet after receiving the data packet.
  • the communication parameters of the device, and receiving and processing each data packet sent by the sending device according to the communication parameter, and the receiving device only needs to parse the CRC scrambling sequence of each data packet when receiving the data packet to determine the retransmission information of the data packet,
  • the synchronization information or the identification information of the data packet has low computational complexity, and solves the problem that the receiving device needs to decode each received data packet including the scheduling signaling and receive the service data according to the content of the scheduling signaling in the prior art.
  • the problem of the package is to reduce the resource consumption and improve the efficiency of system communication.
  • FIG. 34 shows a device configuration diagram of a receiving device according to another embodiment of the present invention.
  • the receiving device may be a receiving device in a D2D (Device to Device) device system.
  • the receiving device may include: a receiver 021 and a processor 022;
  • the receiver 021 is configured to receive a data packet sent by the sending device, where the data packet includes a scrambled cyclic redundancy check CRC bit.
  • the information contained in the data packet may be for scheduling signaling.
  • the processor 022 is configured to parse the scrambling sequence according to the scrambled CRC bits; the receiving device may separately descramble the CRC bits in the data packet by using two sets of sequences in Table 1, and determine that the descrambling is successful.
  • the sequence is a scrambling sequence of the CRC bits.
  • the processor 022 is configured to determine, according to the scrambling sequence, a communication parameter of information included in the data packet;
  • the processor 022 is configured to perform receiving processing on each data packet sent by the sending device according to the communication parameter.
  • the processor 022 is configured to: when the information included in the data packet is scheduling signaling, where the communication parameter is used to indicate whether the data packet is the first retransmission information of the retransmitted data packet, Determining, by the first retransmission information, whether the data packet is a retransmission data packet; and controlling, by the determination result, the receiver 021 to receive the data packet.
  • the receiving device may determine, according to the correspondence relationship shown in Table 1 and the determined scrambling sequence, whether the data packet is a retransmission or a new transmission.
  • the cache data corresponding to the same scheduling signaling of the previous or multiple times of receiving the packet needs to be saved, and a new buffer for the next retransmission packet is prepared, and these are corresponding at the baseband.
  • the different retransmission data of the same scheduling signaling is combined, and then the combined data packet is decoded once, without having to decode each retransmission packet separately, reducing the number of decodings and improving the translation.
  • the performance of the code if the data packet is a new transport packet, the baseband data of the data packet of the previous scheduling signaling in the physical layer cache may be cleared, and the buffer for receiving the new transport packet is prepared.
  • the receiving device can determine whether the data packet of the scheduling signaling is a retransmitted data packet or a newly transmitted data packet by parsing a scrambling sequence of the CRC bits of the scheduling signaling, so that the demodulation is prepared in advance. Resources and consolidation methods to improve reception efficiency.
  • the receiving device may also combine the data packet with other data packets of the same scheduling signaling, and perform decoding only on the combined multiple data packets. For users with limited coverage, Reduce the number of decoding and improve decoding performance.
  • the receiving device determines whether the data packet is a retransmitted data packet according to a CRC scrambling sequence in a data packet of the scheduling signaling, and can prepare resources for demodulation and merged in advance.
  • the method solves the problem that the receiving device needs to receive each of the received ones in the prior art.
  • the signaling packet is decoded and receives the data packet of the service data according to the content of the scheduling signaling, and reduces the number of decoding attempts for the user with limited coverage, thereby reducing the resource consumption and improving the communication efficiency of the system.
  • FIG. 35 shows a device configuration diagram of a receiving device according to another embodiment of the present invention.
  • the receiving device may be a receiving device in a D2D (Device to Device) device system.
  • the receiving device may include: a receiver 023 and a processor 024;
  • the receiver 023 is configured to receive a data packet sent by the sending device, where the data packet includes a scrambled cyclic redundancy check CRC bit.
  • the information contained in the data packet may be for scheduling signaling.
  • the processor 024 is configured to parse the scrambling sequence according to the scrambled CRC bits.
  • the sending device and the receiving device are terminal devices of the D2D system, and the receiving device may use the four sets of sequences in Table 2 respectively.
  • the CRC bit in the data packet is descrambled, and the sequence in which the descrambling is successful is determined as the scrambling sequence of the CRC bit.
  • the processor 024 is configured to determine, according to the scrambling sequence, a communication parameter of information included in the data packet;
  • the processor 024 is configured to perform receiving processing on each data packet sent by the sending device according to the communication parameter.
  • the processor 024 is configured to: when the information included in the data packet is scheduling signaling, where the communication parameter is second retransmission information used to indicate the number of retransmissions of the data packet, controlling the receiving machine
  • the number of retransmissions of the data packets of each scheduling signaling is the same in a predefined period.
  • the number of retransmissions of each data packet carrying different scheduling signaling is the same in a large period, for example, a SA (Scheduling Assignment) transmission diagram as shown in FIG.
  • the SA is a packet of scheduling signaling, wherein the number of retransmissions of SA ⁇ SAn is the same, both are 2, and the scrambling sequence used by each SA corresponds to the second sequence in Table 2.
  • the so-called large period refers to a period in which the interval of occurrence of the SA is larger than that of the SA. For example, if two SAs are separated by 40ms (milliseconds) and the SA appears periodically and periodically, a large period can be defined as 1000ms, which is equivalent to Is (seconds). Alternatively, if the interval of the SA is 64 ms, a large period can be defined as 1024 ms.
  • the sending device and the receiving device as the terminal device of the D2D system as an example, the receiving device may determine the number of retransmissions of the data packet according to the correspondence relationship shown in Table 2 and the determined scrambling sequence, and prepare to be used according to the number of retransmission times.
  • Each retransmission packet is buffered, and these different retransmission data packets corresponding to the same scheduling signaling are combined at the baseband. For example, if it is determined that the number of retransmissions of a new SA received is 2, a buffer for 2 packets is prepared for the SA, and if the number of retransmissions of the next new SA is determined to be 3, the next is An SA is ready for caching of 3 packets.
  • the receiving device cannot obtain any control signaling about the format and retransmission information of the SA before receiving the SA. If the retransmitted information is placed in the SA packet, the signaling overhead needs to be increased, and Because the number of retransmissions of the SA cannot be known, the content of the SA can only be parsed one by one, and the probability of parsing failure is high. It is often necessary to try to obtain the retransmission packet of the SA multiple times. In the method shown in the embodiment of the present invention, it is not necessary to add an additional signaling indication in the SA, and the retransmission sequence of the CRC can implicitly indicate the number of retransmissions of the SA, which not only saves the number of retransmissions.
  • the signaling overhead, and the number of retransmissions of the entire SA packet is given before the SA content is demodulated, so that the receiving device of the SA can directly receive the subsequent data packet of the corresponding retransmission number and combine it to reduce the reception.
  • the number of attempts by the device to obtain the retransmission packet of the SA reduces the computational complexity and improves the demodulation performance of the SA.
  • the receiving device determines the number of retransmissions of the scheduling signaling data packet by parsing the scrambling sequence of the CRC bits in the scheduling signaling data packet, and before demodulating the data packet of the scheduling signaling, The number of data packets that need to be combined and decoded and decoded is determined, thereby improving the accuracy of decoding, reducing the number of attempts of the receiving device, and improving the communication performance of the system.
  • the receiving device determines, by using a CRC scrambling sequence used by the data packet of the scheduling signaling, a second retransmission information indicating the number of retransmissions of the data packet of the scheduling signaling.
  • the invention solves the problem that the receiving device needs to decode each received data packet including scheduling signaling and receive the data packet of the service data according to the content of the scheduling signaling in the prior art, thereby achieving the effect of reducing resource consumption;
  • the receiving device can also know how many packets can be combined and demodulated and decoded before demodulation, thereby improving the correctness of decoding and reducing unnecessary attempts of the receiver.
  • FIG. 36 shows a device configuration diagram of a receiving device according to another embodiment of the present invention.
  • the receiving device may be a receiving device in a D2D (Device to Device) device system.
  • the receiving device may include: a receiver 025 and a processor 026;
  • the receiver 025 is configured to receive a data packet sent by the sending device, where the data packet includes a scrambled cyclic redundancy check CRC bit;
  • the data packet is a data packet for scheduling signaling, and the scrambling sequence for scrambling the CRC bits of the scheduling signaling is determined by the transmitting device according to the number of retransmissions of the scheduling signaling or the number of retransmissions of the next scheduling signaling.
  • the scrambling sequence for scrambling the CRC bits of the scheduling signaling is determined by the transmitting device according to the number of retransmissions of the scheduling signaling or the number of retransmissions of the next scheduling signaling.
  • the processor 026 is configured to parse the scrambling sequence according to the scrambled CRC bits.
  • the sending device and the receiving device are terminal devices of the D2D system, and the receiving device may use the four sets of sequences in Table 2 respectively.
  • the CRC bit in the data packet is descrambled, and the sequence in which the descrambling is successful is determined as the scrambling sequence of the CRC bit.
  • the processor 026 is configured to determine, according to the scrambling sequence, a communication parameter of information included in the data packet;
  • the processor 026 is configured to: when the information included in the data packet is scheduling signaling, acquire a scrambling sequence of the data packet of the previous scheduling signaling sent by the sending device; determine the scrambling sequence and Whether the scrambling sequence of the data packet of the previous scheduling signaling is the same; if the result of the determination is that the scrambling sequence is the same as the scrambling sequence of the data packet of the previous scheduling signaling, determining the scrambling sequence a third retransmission information used to indicate the number of retransmissions of the data packet; if the result of the determination is that the scrambling sequence is different from the scrambling sequence of the data packet of the previous scheduling signaling, determining the adding
  • the scrambling sequence is fourth retransmission information for indicating the number of retransmissions of the data packet of the latter scheduling signaling.
  • the receiving device determines the number of retransmissions of the data packet of the current scheduling signaling and the number of retransmissions of the data packet of the next scheduling signaling according to the judgment result and the correspondence relationship shown in Table 2.
  • the receiving device determines that the number of retransmissions indicated by the scrambling sequence used by the SA of the received new scheduling signaling is the same as the number of retransmissions used by the actual SA, determining the SA of the next scheduling signaling to be received.
  • the number of retransmissions is the same as the number of retransmissions of the SA of the currently received scheduling signaling. If the receiving device determines that the number of retransmissions indicated by the scrambling sequence used by the SA of the current scheduling signaling is different from the number of retransmissions actually used, determining the number of retransmissions of the SA of the next scheduling signaling to be received.
  • the number of retransmissions of the SA that is currently received by the scheduling signaling is different; the receiving device determines the number of retransmissions of the SA of the current scheduling signaling and the number of retransmissions of the SA of the next scheduling signaling to be received according to Table 2.
  • the processor 026 is configured to control the receiver 025 to perform receiving processing on each data packet sent by the sending device according to the communication parameter.
  • the receiving device prepares to buffer the current data packet and the next data packet of the scheduling signaling to be received according to the determined communication parameter, and receives the merged corresponding retransmission data packet.
  • the receiving device may determine, according to Table 2, the number of retransmissions of the SA of the current scheduling signaling and the number of retransmissions of the SA of the next scheduling signaling to be received, and accordingly, the SA of the new scheduling signaling and The SA of the next scheduling signaling allocates a buffer, and prepares the next scheduling signaling SA to receive the number of merges in advance.
  • the receiving device cannot obtain any control signaling about the format and retransmission information of the SA before receiving the SA. If the retransmitted information is placed in the SA packet, the signaling overhead needs to be increased, and Because the number of retransmissions of the SA cannot be known, the content of the SA can only be parsed one by one, and the probability of parsing failure is high. It is often necessary to try to obtain the retransmission packet of the SA multiple times.
  • the scrambling sequence of the CRC can implicitly indicate the number of retransmissions of the next SA to be received, which not only saves Indicates the signaling overhead of the number of retransmissions, and gives the number of retransmissions of the entire SA packet before demodulating the SA content, so that the receiving device of the SA can directly receive the subsequent data packet of the corresponding retransmission number.
  • the combination is performed to reduce the number of attempts by the receiving device to obtain the retransmission packet of the SA, which reduces the computational complexity and improves the demodulation performance of the SA.
  • the receiving device determines the number of retransmissions of the data packet and the number of retransmissions of the data packet of the next scheduling signaling according to the CRC scrambling sequence in the data packet of the current scheduling signaling.
  • the receiving device only needs to compare the number of retransmissions actually used by the current scheduling signaling with the scrambling sequence used by the current scheduling signaling to determine the number of retransmissions of the data packet of the next scheduling signaling, thereby reducing the acquisition of the next one.
  • the number of attempts of scheduling signaling solves the problem that the receiving device needs to decode each received data packet including scheduling signaling and receive the data packet of the service data according to the content of the scheduling signaling in the prior art, thereby reducing resources.
  • the receiving device may be a receiving device in a D2D (Device to Device) device system.
  • the receiving device can include: a receiver 027 and a processor 028;
  • the receiver 027 is configured to receive a data packet sent by the sending device, where the data packet includes a scrambled cyclic redundancy check CRC bit.
  • the data packet is a data packet for scheduling signaling, and the scrambling sequence for scrambling the CRC bits in the data packet is retransmitted by the transmitting device according to the data packet of each service data corresponding to the scheduling signaling.
  • the scrambling sequence for scrambling the CRC bits in the data packet is retransmitted by the transmitting device according to the data packet of each service data corresponding to the scheduling signaling.
  • the processor 028 is configured to parse the scrambling sequence according to the scrambled CRC bits.
  • the sending device and the receiving device are terminal devices of the D2D system, and the receiving device may use the four sets of sequences in Table 2 respectively.
  • the CRC bit in the data packet is descrambled, and the sequence in which the descrambling is successful is determined as the scrambling sequence of the CRC bit.
  • the processor 028 is configured to determine, according to the scrambling sequence, a communication parameter of information included in the data packet;
  • the receiving device may determine the number of retransmissions of the data packets of the respective service data corresponding to the scheduling signal according to the correspondence relationship shown in Table 2 and the determined scrambling sequence.
  • the processor 028 is configured to control the receiver 027 to perform receiving processing on each data packet sent by the sending device according to the communication parameter.
  • the processor 028 is configured to: when the information included in the data packet is scheduling signaling, where the communication parameter is the fifth retransmission information, control the receiver 027 to receive the scheduling according to the fifth retransmission information.
  • the data packet of each service data corresponding to the signaling; the fifth retransmission information is used to indicate the number of retransmissions of data packets of each service data corresponding to the scheduling signaling, or the fifth retransmission information is used for And indicating a number of retransmissions of the first data packet in the data packet of each service data corresponding to the scheduling signaling; and the fifth retransmission information is used to indicate a data packet of each service data corresponding to the scheduling signaling When the number of retransmissions is repeated, the number of retransmissions of data packets of each service data corresponding to the scheduling signaling is the same.
  • the receiving device may prepare a buffer for the retransmission packet of each service data according to the number of retransmissions, or prepare a buffer for the retransmission packet of the first service data in each service data, and directly receive the corresponding service data. Retransfer packages and merge.
  • the sending device determines the scrambling sequence of the CRC bits of the scheduling signaling according to the data packet of each service data corresponding to the scheduling signaling or the number of retransmissions of the first service data in each service data.
  • the receiving device can determine the number of retransmissions of the data packet of each service data corresponding to the scheduling signaling or the first service data of each service data by parsing the scrambling sequence of the CRC bits of the scheduling signaling, and does not need to be scheduled. Special signaling is added to the content of the signaling, which saves signaling overhead.
  • the sending device determines the number of retransmissions of the data packet of the service data according to the scrambling sequence in the data packet of the scheduling signaling, and can prepare the resource of the data packet of each service data in advance, and directly merge the retransmitted data packets.
  • the computational complexity is reduced and the demodulation performance of each service data packet is improved.
  • the receiving device provided by the embodiment of the present invention determines the data packet of each service data corresponding to the scheduling signaling or the first service data in each service data by scheduling a CRC scrambling sequence of the data packet of the scheduling signaling.
  • the number of retransmissions solves the problem that the prior art needs to use the signaling content included in the SA to indicate the number of retransmissions of the service data packet, reduces the signaling overhead in the SA, and makes the receiver know the SA behind it in advance.
  • the number of retransmissions of service data facilitates the preparation and merging of subsequent data in advance, which reduces the computational complexity and improves the demodulation performance of each service data packet.
  • FIG. 38 shows a device configuration diagram of a receiving device according to another embodiment of the present invention.
  • the receiving device may be a receiving device in a D2D (Device to Device) device system.
  • the receiving device may include: a receiver 029 and a processor 030;
  • the receiver 029 is configured to receive a data packet sent by the sending device, where the data packet includes a scrambled cyclic redundancy check CRC bit;
  • the data packet is a data packet of the service data, and the number of retransmissions of the data packet of different service data between the data packets of two adjacent scheduling signalings is the same.
  • the sending device to generate the data packet refer to the steps in the embodiment corresponding to FIG. 10, and details are not described herein again.
  • the processor 030 is configured to parse the scrambling sequence according to the scrambled CRC bits.
  • the sending device and the receiving device are terminal devices of the D2D system, and the receiving device may use the four sets of sequences in Table 2 respectively.
  • the CRC bit in the data packet is descrambled, and the sequence in which the descrambling is successful is determined as the scrambling sequence of the CRC bit.
  • the processor 030 is configured to determine, according to the scrambling sequence, a communication parameter of information included in the data packet;
  • the communication parameter is sixth retransmission information indicating the number of retransmissions of the data packet, and the receiving device can determine the number of retransmissions of the data packet of the service data according to the correspondence relationship shown in Table 2 and the determined scrambling sequence.
  • the processor 030 is configured to control the receiver 029 to perform receiving processing on each data packet sent by the sending device according to the communication parameter.
  • the processor 030 is configured to: when the information to be sent is service data, where the communication parameter is the sixth retransmission information used to indicate the number of retransmissions of the data packet, the receiver 029 is controlled according to the The number of retransmissions of the data packet receives each data packet including the service data, wherein the number of retransmissions of the data packets of different service data between the data packets of two adjacent scheduling signalings is the same.
  • the receiving device can prepare a buffer for each retransmission packet according to the number of retransmissions, and this is used at the baseband Different retransmission data packets corresponding to the same scheduling signaling are combined.
  • the number of retransmissions of data packets of different service data between data packets of two adjacent scheduling signalings is the same.
  • a service data (DATA) transmission diagram where SA1 and SA2 contain n different service data packets, respectively DATA! ⁇ DATA n , each DATA retransmission The number of times is 2, and the scrambling sequence used by each DATA corresponds to the second set of sequences in FIG.
  • the sending device determines, according to the number of retransmissions of the data packet of the service data, a scrambling sequence of the CRC bit of the data packet of the service data, so that the receiving device passes the CRC bit of the data packet of the service data.
  • the scrambling sequence can determine the number of retransmissions of the data packet of the service data, and does not need to add dedicated signaling in the content of the scheduling instruction, thereby saving signaling overhead.
  • the receiving device since the number of retransmissions of data packets of different service data between the data packets of two adjacent scheduling signaling is the same, the receiving device only needs to parse the data packet of one service data to determine other subsequent service data.
  • the number of retransmissions of the data packet so that the resources of the data packets of each service data can be prepared in advance, and the retransmitted data packets are directly merged, thereby reducing the computational complexity and improving the demodulation performance of each service data packet.
  • the receiving device determines the sixth retransmission information for indicating the number of retransmissions of the data packet of the service data by using the CRC scrambling sequence corresponding to the data packet of the service data, and solves the problem.
  • the signaling content included in the SA is used to indicate that the signaling overhead caused by the number of retransmissions of the service data packet is large, the signaling overhead in the SA is reduced, and the receiving device is parsing a service data packet. After that, the number of retransmissions of subsequent service data can be known in advance, and it is convenient to prepare and receive subsequent data in advance, which reduces computational complexity and improves demodulation performance of each service data packet. Referring to FIG.
  • the receiving device may be a receiving device in a D2D (Device to Device) device system.
  • the receiving device may include: a receiver 031 and a processor 032;
  • the receiver 031 is configured to receive a data packet sent by the sending device, where the data packet includes a scrambled cyclic redundancy check CRC bit;
  • the data packet is a data packet of the service data, and the CRC scrambling sequence of the data packet is determined by the transmitting device according to the number of retransmissions of the data packet of the at least one service data after the monthly data packet.
  • the processor 032 is configured to parse the scrambling sequence according to the scrambled CRC bits.
  • the transmitting device and the receiving device are terminal devices of the D2D system, and the receiving device may use the four sets of sequences in Table 2 respectively.
  • the CRC bit in the data packet is descrambled, and the sequence in which the descrambling is successful is determined as the scrambling sequence of the CRC bit.
  • the processor 032 is configured to determine, according to the scrambling sequence, a communication parameter of information included in the data packet;
  • the communication parameter is a seventh retransmission information indicating whether the data packet of the at least one service data after the data packet of the service data is a retransmission data packet; the receiving device may according to the correspondence relationship shown in Table 2 and the determined addition
  • the scrambling sequence queries the number of retransmissions of the data packet of the subsequent at least one service data of the data packet.
  • the processor 032 is configured to control the receiver 031 to perform receiving processing on each data packet sent by the sending device according to the communication parameter.
  • the processor 032 is configured to: when the to-be-sent information is service data, where the communication parameter is a seventh retransmission information for indicating a retransmission number of data packets of at least one service data after the data packet And controlling the receiver 031 to receive the data packet of the at least one service data according to the number of retransmissions of the data packet of the at least one service data after the data packet.
  • the receiving device may prepare a method of buffering and merging in advance according to the number of retransmissions of the data packet of the at least one service data subsequent to the data packet.
  • the sending device determines, according to the number of retransmissions of the data packet of the at least one service data after the data packet of the current service data, the scrambling sequence of the CRC bit of the data packet of the service data, so as to receive
  • the device can determine the number of retransmissions of the data packets of each service data subsequent to the data packet of the service data by parsing the scrambling sequence of the CRC bits of the data packet of the service data, and does not need to add dedicated signaling in the content of the scheduling instruction. , saving signaling overhead.
  • the instruction of the embodiment of the present invention can easily make an indication, thereby making The number of transmissions of data packets of each service data after each SA can be changed as needed, which improves the flexibility of the system.
  • the information to be sent is the scheduling signaling
  • the fifth retransmission information is used to indicate the data of each service data corresponding to the scheduling signaling.
  • the combination of the number of retransmissions of the first data packet in the packet, that is, the CRC scrambling sequence in one scheduling signaling indicates the number of retransmissions of the data packet of the first service data after the scheduling signaling, and the adjustment
  • the CRC scrambling sequence of the data packets of the respective service data corresponding to the degree signaling respectively indicates the number of retransmissions of the data packets of at least one service data after itself.
  • the receiving device determines the number of retransmissions of data packets of at least one service data after the data packet of the current service data according to the CRC scrambling sequence of the data packet of the current service data, and solves the problem.
  • the signaling content included in the SA is used to indicate the number of retransmissions of the service data packet, the signaling overhead in the SA is reduced, and the number of transmissions of each data packet behind each SA can be as needed. And change, which increases the flexibility of the system.
  • FIG. 40 there is shown a device configuration diagram of a receiving device according to another embodiment of the present invention.
  • the receiving device may be a receiving device in a D2D (Device to Device) device system.
  • the receiving device may include: a receiver 033 and a processor 034;
  • the receiver 033 is configured to receive a data packet sent by the sending device, where the data packet includes a scrambled cyclic redundancy check CRC bit;
  • the data packet is a data packet for scheduling signaling, and the CRC scrambling sequence of the data packet is determined by the transmitting device according to the identifier of its own corresponding synchronization signal.
  • the sending device to generate the data packet refer to the steps in the embodiment corresponding to FIG. 13 , and details are not described herein again.
  • the processor 034 is configured to parse a scrambling sequence according to the scrambled CRC bits, where the processor 034 is configured to determine, according to the scrambling sequence, a communication parameter of information included in the data packet;
  • the processor 034 is configured to determine an identifier of the synchronization signal according to the scrambling sequence and a correspondence between an identifier of the synchronization signal set in advance and the scrambling sequence.
  • the receiving device may first determine a scrambling sequence corresponding to the identifier of each synchronization signal received by the receiving device. Specifically, the receiving device may according to each received synchronization. The identifier of the signal and the correspondence between the scrambling sequence and the identifier of the synchronization signal determine a scrambling sequence corresponding to the identifiers of the received synchronization signals, and the receiving device respectively solves the CRC bits in the data packet by using the determined sequence. The sequence of the CRC bits in the data packet of the scheduling signaling is determined by the sequence of the descrambling success. The identifier of the synchronization signal corresponding to the scrambling sequence of the CRC bits in the data packet of the scheduling signaling is the identifier of the synchronization signal corresponding to the transmitting device.
  • the processor 034 is configured to perform receiving processing on each data packet sent by the sending device according to the communication parameter.
  • the processor 034 is configured to: when the information to be sent is scheduling signaling, where the communication parameter is used to indicate the identifier of the synchronization signal corresponding to the sending device, perform the synchronization device corresponding to the identifier of the synchronization signal Signal synchronization; controlling the receiver 033 to receive each data packet subsequently transmitted by the transmitting device after the synchronization is completed.
  • the receiving device synchronizes with the transmitting device according to the identifier of the synchronization signal corresponding to the scrambling sequence of the CRC bit to the same synchronization source device, and receives each data packet subsequently sent by the transmitting device after the synchronization is completed.
  • the receiving device determines the identifier of the synchronization signal corresponding to the sending device by parsing the CRC scrambling sequence in the scheduling signaling, and synchronizes with the sending device according to the identifier of the synchronization signal.
  • the synchronization source device solves the problem that the demodulation performance is degraded due to different synchronization sources of the transceiver referenced by the communication in the prior art, thereby improving the demodulation performance of the receiver.
  • FIG. 41 there is shown a device configuration diagram of a receiving device according to another embodiment of the present invention.
  • the receiving device may be a receiving device in a D2D (Device to Device) device system.
  • the receiving device may include: a receiver 035 and a processor 036;
  • the receiver 035 is configured to receive a data packet sent by the sending device, where the data packet includes a scrambled cyclic redundancy check CRC bit.
  • the data packet is a data packet of the scheduling instruction, and the sending device determines the scrambling sequence of the data packet according to the identifier indicated in the scheduling instruction.
  • the sending device determines the scrambling sequence of the data packet according to the identifier indicated in the scheduling instruction.
  • the processor 036 is configured to parse the scrambling sequence according to the scrambled CRC bits.
  • the sending device and the receiving device are terminal devices of the D2D system, and the receiving device may use the two sets of sequences in Table 3 respectively.
  • the CRC bit in the data packet is descrambled, and the sequence in which the descrambling is successful is determined as the scrambling sequence of the CRC bit.
  • the processor 036 is configured to determine, according to the scrambling sequence, a communication parameter of information included in the data packet;
  • the identifier indicated in the scheduling signaling is used to identify the identifier information of the data packet.
  • the receiving device may determine the identifier indicated in the scheduling signaling according to the parsed scrambling sequence and the correspondence between the scrambling sequence shown in Table 3 and the identifier indicated in the scheduling signaling.
  • the processor 036 is configured to control the receiver 035 to perform receiving processing on each data packet sent by the sending device according to the communication parameter.
  • the processor 036 is configured to: when the information to be sent is scheduling signaling, where the communication parameter is an identifier indicated in the scheduling signaling, control, by the receiver 035, according to the indication in the scheduling signaling And identifying, by the sending device, each data packet that includes the scheduling signaling, where the identifier indicated by the scheduling signaling is used to identify the identifier information of the data packet.
  • the identifier information of the data packet may be used to indicate, by the receiving device, whether the data packet is a data packet corresponding to the receiving device. If the receiving device determines that the data packet is a data packet corresponding to the receiving device, decoding the data packet and the subsequent steps; if the receiving device determines that the data packet is not the data packet corresponding to the receiving device, Packets are dropped.
  • the receiving device determines a corresponding scrambling sequence by parsing a data packet of a scheduling instruction, and determines identification information of the data packet according to the determined scrambling sequence, according to the identification information of the data packet. Determining whether the data packet is a data packet corresponding to the receiving device, and solving the data packet that the receiving device needs to decode each received data packet including the scheduling signaling and receive the service data according to the content of the scheduling instruction in the prior art. The problem is to reduce the resource consumption and improve the efficiency of system communication.
  • FIG. 42 a flow chart of a method for wireless communication provided by an embodiment of the present invention is provided.
  • the wireless communication method can be used in a transmitting device of a D2D (Device to Device) device.
  • the wireless communication method can include:
  • Step 1902 Determine a corresponding scrambling sequence according to the communication parameter of the to-be-transmitted information.
  • Step 1904 scrambling the cyclic redundancy check CRC bit corresponding to the to-be-transmitted information according to the scrambling sequence to generate a scrambled CRC bit.
  • Step 1906 generating a data packet of the to-be-sent information, where the data packet includes the scrambled CRC bit;
  • Step 1908 the data packet is sent to the receiving device, and the receiving device parses the scrambled sequence according to the received scrambled CRC bit, determines the communication parameter according to the scrambling sequence, and according to the communication parameter Each data packet sent by the transmitting device is subjected to reception processing.
  • the communication parameter is used to indicate retransmission information, a synchronization signal corresponding to the sending device, or identification information of the data packet.
  • the identifier information of the data packet may be used to instruct the receiving device to determine whether the data packet is a data packet corresponding to the receiving device.
  • the wireless communication method provided by the embodiment of the present invention is carried by using a scrambling sequence.
  • the receiving device After receiving the data packet of the information to be transmitted, the receiving device obtains the communication parameter for indicating the retransmission information, the synchronization signal corresponding to the sending device, or the destination device of the data packet by parsing the scrambling sequence. And receiving each data packet sent by the sending device according to the communication parameter, and the receiving device only needs to parse the CRC scrambling sequence of each data packet when receiving the data packet to determine the retransmission information, the synchronization information, or the identifier of the data packet of the data packet.
  • the information has low computational complexity, and solves the problem that the receiving device needs to decode each received data packet including scheduling signaling and receive the data packet of the service data according to the content of the scheduling signaling in the prior art, thereby reducing resources. Consumption, improve the efficiency of system communication.
  • FIG. 43 is a flowchart of a method for wireless communication provided by another embodiment of the present invention, which may be used in a transmitting device of a D2D system.
  • the wireless communication method may indicate a communication parameter by a scrambling sequence so that the receiving device performs reception of the data packet according to the communication parameter.
  • the information to be sent is the scheduling signaling
  • the communication parameter of the information to be sent is the retransmission information.
  • the wireless communication method may include:
  • Step 2002 Determine, according to the first retransmission information, a scrambling sequence of the scheduling signaling to be sent, where the first retransmission information is used to indicate whether the data packet of the scheduling signaling is a retransmission data packet.
  • the transmitting device In wireless communication, in order to improve the performance of data transmission, expand the coverage of the signal, and ensure that the receiving device can correctly receive data, the transmitting device usually performs multiple retransmissions of the same data packet.
  • the scrambling sequence of the scheduling signaling may be determined according to whether the data packet is a retransmitted data packet.
  • the sending device may obtain a scrambling sequence of the data packet of the previous scheduling signaling sent by the sending device; when the first retransmission information indicates that the data packet is a retransmitted data packet, determining that the scrambling sequence is the former a scrambling sequence of a packet for scheduling signaling; when the first retransmission information indicates that the data packet is not a retransmission data packet, determining that the scrambling sequence is a scrambling sequence of a data packet of a previous scheduling signaling Another scrambling sequence that differs.
  • the correspondence between the scrambling sequence and whether or not to retransmit is as shown in Table 1, where the retransmitted data packet corresponds to the scrambling.
  • the sequence is [0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0]
  • the newly transmitted data packet corresponds to the force port 4, especially the sequence 'J is [0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1].
  • Table 1 is known to the transmitting device and the receiving device.
  • Table 1 for example, when the data packet of the scheduling signaling is retransmitted, it is determined by using the scrambling sequence ⁇ ' J [0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0] The CRC bit corresponding to the scheduling signaling is scrambled; when the data packet of the scheduling signaling is a new transmission, the scrambling sequence is determined by using the query table 1 [0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1] The CRC bits corresponding to the scheduling signaling are scrambled.
  • c k denotes the scrambled bit
  • A denotes the number of bits of the information bits of the data packet
  • p ⁇ A denotes the CRC verification bit
  • x kA denotes the scrambling sequence of the CRC in Table 1
  • Step 2006 generating a data packet of the scheduling signaling, where the data packet includes the scrambled CRC bit;
  • the receiving device adds the scrambled CRC bits to the scheduling signaling to form uncoded information bits, and encodes the uncoded information bits to generate a data packet of the scheduling signaling.
  • Step 2008 the data packet is sent to the receiving device.
  • the sending device sends the data packet through D2D broadcast mode, and after receiving the data packet, the receiving device in the coverage of the D2D signal of the sending device can use the The two sets of sequences respectively descramble the CRC bits in the data packet, determine the sequence of successful descrambling as the scrambling sequence of the CRC bits, and determine the data packet according to the correspondence relationship shown in Table 1 and the determined scrambling sequence. Retransmission or new biography.
  • the cache data corresponding to the same scheduling signaling of the previous or multiple times of receiving the packet needs to be saved, and a new buffer for the next retransmission packet is prepared, and these are corresponding at the baseband.
  • the different retransmission data of the same scheduling signaling is combined, and then the combined data packet is decoded once, without having to decode each retransmission packet separately, reducing the number of decodings and improving the translation.
  • the performance of the code if the data packet is a new transport packet, the baseband data of the data packet of the previous scheduling signaling in the physical layer cache may be cleared, and the buffer for receiving the new transport packet is prepared.
  • the sending device can determine whether the data packet of the scheduling signaling is a retransmitted data packet or a newly transmitted data packet by parsing the scrambling sequence of the CRC bits of the scheduling signaling, so that the demodulation is prepared in advance. Resources and consolidation methods to improve reception efficiency.
  • the sending device may also combine the data packet with other data packets of the same scheduling signaling, and perform decoding only on the combined multiple data packets. For users with limited coverage, Reduce the number of decoding and improve decoding performance.
  • the wireless communication method provided by the embodiment of the present invention is used to indicate the scheduling according to Determining whether the data packet of the retransmission data packet is a scrambling sequence of the scheduling signaling to be sent, and the receiving device only needs to pass the scrambling sequence to determine whether the data packet is a retransmission data packet.
  • the receiving device in the prior art needs to decode each received data packet including scheduling signaling and receive the service according to the content of the scheduling signaling. The problem of data packets, and the number of decoding attempts is reduced for users with limited coverage, thereby reducing resource consumption and improving system communication efficiency. Please refer to FIG.
  • the wireless communication method can be used in a transmitting device of a D2D system.
  • the wireless communication method may indicate a communication parameter by a scrambling sequence so that the receiving device performs reception of the data packet according to the communication parameter.
  • the information to be sent is the scheduling signaling
  • the communication parameter of the information to be sent is the retransmission information.
  • the wireless communication method may include:
  • Step 2102 Determine, according to the second retransmission information, a scrambling sequence, where the second retransmission information is used to indicate the number of retransmissions of the data packet corresponding to the scheduling signaling.
  • the correspondence between the number of retransmissions and the scrambling sequence is as shown in Table 2, wherein the number of retransmissions is 1 indicates a data packet. Only sent once, the number of retransmissions is 2, the packet is sent twice, and so on.
  • Step 2104 Perform scrambling on the CRC bit corresponding to the scheduling signaling according to the scrambling sequence to generate a scrambled CRC bit.
  • the CRC corresponding to the scheduling signaling is determined by using the scrambling sequence ⁇ ' J [00 0 00 0 0 00 0 00 0 0 00] by querying Table 2.
  • the bit is performed by the force port 4; when the number of data packet retransmissions is 2, it is determined by using the scrambling table 2 that the scrambling sequence [0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1] is used to correspond to the scheduling signaling.
  • the CRC bits are scrambled, and so on.
  • Step 2106 generating a data packet of the scheduling signaling, where the data packet includes the scrambled CRC bit;
  • the receiving device adds the scrambled CRC bits to the scheduling signaling to form uncoded information bits, and encodes the uncoded information bits to generate a data packet of the scheduling signaling.
  • Step 2108 Send the data packet to the receiving device.
  • the number of retransmissions of each data packet carrying different scheduling signaling is the same in a large period, for example, a SA (Scheduling Assignment) transmission diagram as shown in FIG.
  • the SA is a data packet for scheduling signaling
  • the number of retransmissions of SA ⁇ SAn is Similarly, both are 2, and the scrambling sequence used by each SA corresponds to the second set of sequences in Table 2.
  • the so-called large period refers to a period in which the interval in which the SA occurs in a periodic manner is larger.
  • the interval between two adjacent SAs is 40ms (milliseconds), and the SA occurs periodically according to this interval.
  • a large period can be defined as 1000ms, which is equivalent to Is (seconds).
  • a large period can be defined as 1024ms.
  • the scrambling sequence used by the SA whose retransmission times are changed may be modified correspondingly, for example, another type as shown in FIG.
  • the SA transmission diagram is in which the number of retransmissions of SA n+1 is changed to three times, and the scrambling sequence used by SA n+1 is changed to the third group sequence in Table 2.
  • the sending device sends the data packet through the D2D broadcast mode, and after receiving the data packet, the receiving device in the coverage of the D2D signal of the transmitting device can use the The four sets of sequences respectively descramble the CRC bits in the data packet, determine the sequence of successful descrambling as the scrambling sequence of the CRC bits, and determine the data packet according to the correspondence relationship shown in Table 2 and the determined scrambling sequence.
  • the number of retransmissions is prepared, and a buffer for each retransmission packet is prepared according to the number of retransmissions, and these different retransmission data packets corresponding to the same scheduling signaling are combined at the baseband.
  • the receiving device cannot obtain any control signaling about the format and retransmission information of the SA before receiving the SA. If the retransmitted information is placed in the SA packet, the signaling overhead needs to be increased, and Because the number of retransmissions of the SA cannot be known, the content of the SA can only be parsed one by one, and the probability of parsing failure is high. It is often necessary to try to obtain the retransmission packet of the SA multiple times. In the method shown in the embodiment of the present invention, it is not necessary to add an additional signaling indication in the SA, and the retransmission sequence of the CRC can implicitly indicate the number of retransmissions of the SA, which not only saves the number of retransmissions.
  • the signaling overhead, and the number of retransmissions of the entire SA packet is given before the SA content is demodulated, so that the receiving device of the SA can directly receive the subsequent data packet of the corresponding retransmission number and combine it to reduce the reception.
  • the number of attempts by the device to obtain the retransmission packet of the SA reduces the computational complexity and improves the demodulation performance of the SA.
  • the receiving device determines the number of retransmissions of the scheduling signaling data packet by parsing the scrambling sequence of the CRC bits in the scheduling signaling data packet, and before demodulating the data packet of the scheduling signaling, Determining the number of data packets that need to be combined for decoding and decoding, thereby improving the accuracy of decoding, Reduce the number of attempts by the receiving device to achieve the effect of improving system communication performance.
  • the wireless communication method provided by the embodiment of the present invention determines a scrambling sequence corresponding to the scheduling signaling to be sent according to the second retransmission information used to indicate the number of retransmissions of the data packet of the scheduling signaling,
  • the receiving device only needs to pass the scrambling sequence to determine the number of retransmissions of the data packet, and solves the problem that the receiving device needs to decode each received data packet including scheduling signaling according to the scheduling signaling.
  • the content receiving the data packet of the service data achieves the effect of reducing resource consumption.
  • the wireless communication method provided by the embodiment of the present invention can also know how many packets can be combined and demodulated and decoded before demodulation.
  • FIG. 45 it is a flowchart of a method for wireless communication provided by another embodiment of the present invention, which may be used in a transmitting device of a D2D system.
  • the wireless communication method can indicate a communication parameter through a scrambling sequence so that the receiving device receives the data packet based on the communication parameter.
  • the information to be sent is the scheduling signaling
  • the communication parameter of the information to be sent is retransmission information.
  • the wireless communication method may include:
  • Step 2202 When the number of retransmissions of the data packet of the scheduling signaling is the same as the number of retransmissions of the data packet of the next scheduling signaling, the third weight according to the number of retransmissions of the data packet used to indicate the scheduling signaling Transmitting information to determine a scrambling sequence;
  • Step 2204 When the number of retransmissions of the data packet of the scheduling signaling is different from the number of retransmissions of the data packet of the next scheduling signaling, according to the fourth retransmission number of the data packet used to indicate the next scheduling signaling Retransmitting the information to determine the scrambling sequence;
  • the sending device When determining the scrambling sequence, the sending device first acquires the number of retransmissions of the data packet of the next scheduling signaling, and determines whether the number of retransmissions of the data packet of the next scheduling signaling and the number of retransmissions of the data packet of the current scheduling signaling are If the two are the same, the sequence corresponding to the number of retransmissions of the data packet of the current scheduling signaling is determined as the scrambling sequence used by the data packet of the current scheduling signaling; if the two are different, The sequence corresponding to the number of retransmissions of the data packet of the next scheduling signaling is determined as the scrambling sequence used by the data packet of the current scheduling signaling.
  • SAr ⁇ SAn has the same number of retransmissions, both of which are 2 times, and the number of retransmissions of SA n+1 is 3 times, and SA ⁇ SA ⁇ is used.
  • Scrambling sequence is a table The second set of sequences in 2, the scrambling sequence used by SA n is the third set of sequences in Table 3.
  • Step 2206 Perform scrambling on the CRC bit corresponding to the scheduling signaling according to the scrambling sequence to generate a scrambled CRC bit.
  • Step 2208 generating a data packet of the scheduling signaling, where the data packet includes the scrambled CRC bit;
  • the receiving device adds the scrambled CRC bits to the scheduling signaling to form uncoded information bits, and encodes the uncoded information bits to generate a data packet of the scheduling signaling.
  • Step 2210 Send the data packet to the receiving device.
  • the sending device sends the data packet through the D2D broadcast mode, and after receiving the data packet, the receiving device in the coverage of the D2D signal of the transmitting device can use the The four sets of sequences respectively descramble the CRC bits in the data packet, determine that the sequence of successful descrambling is the scrambling sequence of the CRC bits, and obtain the scrambling sequence corresponding to the data packet of the previous scheduling signaling sent by the sending device; Determining whether the scrambling sequence corresponding to the data packet of the previous scheduling signaling is the same; if the judgment result is that the scrambling sequence is the same as the scrambling sequence corresponding to the data packet of the previous scheduling signaling, determining The scrambling sequence is a third retransmission information indicating the number of retransmissions of the data packet; if the result of the determination is that the scrambling sequence is different from the scrambling sequence corresponding to the data packet of the previous scheduling
  • the receiving device determines, according to the judgment result and the correspondence relationship shown in Table 2, the number of retransmissions of the data packet of the current scheduling signaling and the number of retransmissions of the data packet of the next scheduling signaling, and prepares the data packets for the two scheduling signaling.
  • the respective cache stores the data packets for the two scheduling signaling.
  • the receiving device determines that the number of retransmissions indicated by the scrambling sequence used by the SA of the received new scheduling signaling is the same as the number of retransmissions used by the actual SA, determining the SA of the next scheduling signaling to be received.
  • the number of retransmissions is the same as the number of retransmissions of the SA of the currently received scheduling signaling. If the receiving device determines that the number of retransmissions indicated by the scrambling sequence used by the SA of the current scheduling signaling is different from the number of retransmissions actually used, determining the number of retransmissions of the SA of the next scheduling signaling to be received.
  • the number of retransmissions of the SA that is currently received by the scheduling signaling is different; the receiving device determines, according to Table 2, the number of retransmissions of the SA of the current scheduling signaling and the number of retransmissions of the SA of the next scheduling signaling to be received, According to this, the SA of the new scheduling signaling and the SA of the next scheduling signaling are allocated, and the number of times the next scheduling signaling SA receives the combining is prepared in advance.
  • the receiving device cannot obtain any control signaling about the format and retransmission information of the SA before receiving the SA. If the retransmitted information is placed in the SA packet, the information needs to be added. The cost is exceeded, and because the number of retransmissions of the SA cannot be known, the content of the SA can be parsed one by one, and the probability of failure of parsing is high. It is often necessary to obtain the retransmission packet of the SA multiple times.
  • the scrambling sequence of the CRC can implicitly indicate the number of retransmissions of the next SA to be received, which not only saves Indicates the signaling overhead of the number of retransmissions, and gives the number of retransmissions of the entire SA packet before demodulating the SA content, so that the receiving device of the SA can directly receive the subsequent data packet of the corresponding retransmission number.
  • the combination is performed to reduce the number of attempts by the receiving device to obtain the retransmission packet of the SA, which reduces the computational complexity and improves the demodulation performance of the SA.
  • the method for wireless communication according to the embodiment of the present invention is based on the scheduling signaling according to the number of retransmissions of the data packet corresponding to the scheduling signaling and the number of retransmissions of the data packet of the next scheduling signaling.
  • the number of retransmissions of the data packet determines the scrambling sequence; when the number of retransmissions of the data packet corresponding to the scheduling signaling is different from the number of retransmissions of the data packet of the next scheduling signaling, the data packet according to the next scheduling signaling.
  • the number of retransmissions determines the scrambling sequence, and the receiving device only needs to compare the number of retransmissions actually used by the current scheduling signaling with the scrambling sequence used by the current scheduling signaling to determine the retransmission of the data packet of the next scheduling signaling.
  • FIG. 46 it is a flowchart of a method for wireless communication provided by another embodiment of the present invention, which may be used in a transmitting device of a D2D system.
  • the wireless communication method can indicate a communication parameter through a scrambling sequence so that the receiving device receives the data packet based on the communication parameter.
  • the information to be sent is the scheduling signaling
  • the communication parameter of the information to be sent is retransmission information.
  • the wireless communication method may include:
  • the scrambling sequence is determined according to the fifth retransmission information, where the fifth retransmission information is used to indicate the number of retransmissions of the data packets of the service data corresponding to the scheduling signaling, or the fifth retransmission information is used. And a number of retransmissions of the first data packet in the data packet indicating the service data corresponding to the scheduling signaling;
  • scheduling signaling corresponds to a scheduling indication of data packets of several service data, for example, using four groups of 16-bit scrambling sequences respectively corresponding to four retransmission times as an example, scrambling used for scheduling signaling packets
  • the number of retransmissions of the data packets of each service data corresponding to the scheduling signaling may be as shown in Table 2.
  • the number of retransmissions is 1.
  • the data packet of each service data corresponding to the scheduling signaling is sent only once, the number of retransmissions is 2, the data packet of each service data corresponding to the scheduling signaling is sent twice, and so on. .
  • the fifth retransmission information when used to indicate the number of retransmissions of data packets of each service data corresponding to the scheduling signaling, the data packets of the different service data corresponding to the scheduling signaling are The retransmission times are the same.
  • FIG. 9 a mapping diagram between the scheduling signaling and the service data, where one SA corresponds to n different service data packets, and if the number of retransmissions of each service data packet is 2,
  • the scrambling sequence used by the SA can be determined by the Table 2 query as the second set of sequences in Table 2.
  • Step 2304 Perform scrambling on the CRC bit corresponding to the scheduling signaling according to the scrambling sequence to generate a scrambled CRC bit.
  • Step 2306 generating a data packet of the scheduling signaling, where the data packet includes the scrambled CRC bit;
  • the receiving device adds the scrambled CRC bits to the scheduling signaling to form uncoded information bits, and encodes the uncoded information bits to generate a data packet of the scheduling signaling.
  • Step 2308 the data packet is sent to the receiving device.
  • the sending device and the receiving device are terminal devices of the D2D system, and the sending device sends the data packet of the scheduling signaling by using a D2D broadcast manner, and the receiving device that is within the coverage of the D2D signal of the sending device receives the data packet of the scheduling signaling.
  • the four groups of sequences in Table 2 can be used to descramble the CRC bits in the data packet respectively, and the sequence of successful descrambling is determined as the scrambling sequence of the CRC bits, and according to the correspondence shown in the table and the determined addition.
  • the scrambling sequence determines the number of retransmissions of data packets of each service data corresponding to the scheduling signaling, and prepares a buffer for retransmission packets for each service data according to the number of retransmissions.
  • the fifth retransmission information may be used to indicate the number of retransmissions of the first data packet in the data packet of each service data corresponding to the scheduling signaling, where the fifth retransmission information is used to indicate each of the corresponding scheduling signaling
  • the processing mode when the transmitting device generates the data packet and the fifth retransmission information are used to indicate the number of retransmissions of the data packet of each service data corresponding to the scheduling signaling
  • the timing is similar and will not be repeated here.
  • the receiving device After determining, by the CRC scrambling sequence, the communication parameter is the fifth retransmission information, the receiving device prepares a buffer for the first data packet in each service data according to only the number of retransmissions indicated by the fifth retransmission information.
  • the weight of the data packet of each service data corresponding to the scheduling signaling is The number of transmissions can be the same or different.
  • the sending device determines the scrambling sequence of the CRC bits of the scheduling signaling according to the number of retransmissions of the data packets of the service data corresponding to the scheduling signaling, so that the receiving device parses the CRC of the scheduling signaling.
  • the bit scrambling sequence can determine the number of retransmissions of the data packet of each service data corresponding to the scheduling signaling or the first service data in each service data, and does not need to add dedicated signaling in the content of the scheduling signaling. It saves signaling overhead.
  • the sending device determines the number of retransmissions of the data packet of the service data according to the scrambling sequence in the data packet of the scheduling signaling, and can prepare the resource of the data packet of each service data in advance, and directly merge the retransmitted data packets.
  • the computational complexity is reduced and the demodulation performance of each service data packet is improved.
  • the wireless communication method provided by the embodiment of the present invention determines a scrambling sequence according to the number of retransmissions of data packets of each service data corresponding to the scheduling signaling, and the receiving device only needs to use the data packet of the scheduling signaling.
  • the scrambling sequence used can determine the number of retransmissions of the data packet of the first service data corresponding to the different service data or the service data corresponding to the scheduling signaling, and solves the problem that the prior art needs to use the signaling included in the SA.
  • the content indicates the number of retransmissions of the service data packet, reduces the signaling overhead in the SA, and enables the receiver to know the number of retransmissions of the service data behind the SA in advance, so as to facilitate the preparation and subsequent merging of subsequent data, reducing
  • the computational complexity increases the demodulation performance of each service data packet.
  • FIG. 47 is a flowchart of a method for wireless communication provided by another embodiment of the present invention.
  • the wireless communication method can be used in a transmitting device of a D2D system.
  • the wireless communication method can indicate a communication parameter through a scrambling sequence so that the receiving device receives the data packet based on the communication parameter.
  • the information to be sent is the service data
  • the communication parameter of the information to be sent is the retransmission information.
  • the wireless communication method may include:
  • Step 2402 determining a scrambling sequence according to the sixth retransmission information, where the sixth retransmission information is used to indicate the The number of retransmissions of the data packet;
  • the correspondence between the number of retransmissions of the data packet of the service data and the scrambling sequence used by the data packet of the service data may be as Table 2 shows.
  • the retransmission number of 1 indicates that the data packet of the service data is sent only once, the number of retransmissions is 2, the data packet of the service data is sent twice, and so on.
  • Step 2404 Perform scrambling on the CRC bit corresponding to the service data according to the scrambling sequence to generate a scrambled CRC bit.
  • Step 2406 generating a data packet of the service data, where the data packet includes the scrambled CRC bit;
  • the receiving device adds the scrambled CRC bits to the service data to form uncoded information bits, and encodes the uncoded information bits to generate a data packet of the service data.
  • Step 2408 the data packet is sent to the receiving device.
  • the number of retransmissions of data packets of different service data between data packets of two adjacent scheduling signalings is the same.
  • a service data shown in FIG. 11 (DATA) transmitted schematic which contains n packets of different service data between SA1 and SA2, respectively, DATA! ⁇ DATA n, of each DATA retransmission The number of times is 2, and the scrambling sequence used by each DATA corresponds to the second set of sequences in FIG.
  • the sending device sends the data packet of the service data by using the D2D broadcast mode, and the receiving device that is within the coverage of the D2D signal of the sending device receives the data packet, and can use the table.
  • the four sets of sequences in 2 respectively descramble the CRC bits in the data packet, determine the sequence of successful descrambling as the scrambling sequence of the CRC bits, and determine the corresponding relationship according to the correspondence shown in Table 2 and the determined scrambling sequence.
  • the number of retransmissions of the data packet of the service data, and the buffer for each retransmission packet is prepared according to the number of retransmissions, and the different retransmission data packets corresponding to the same scheduling signaling are combined at the baseband.
  • the sending device determines, according to the number of retransmissions of the data packet of the service data, a scrambling sequence of the CRC bit of the data packet of the service data, so that the receiving device passes the analysis industry.
  • the scrambling sequence of the CRC bits of the data packet can determine the number of retransmissions of the data packet of the service data, and does not need to add dedicated signaling in the content of the scheduling signaling, thereby saving signaling overhead.
  • the receiving device since the number of retransmissions of data packets of different service data between the data packets of two adjacent scheduling signaling is the same, the receiving device only needs to parse the data packet of one service data to determine other subsequent service data.
  • the number of retransmissions of the data packet so that the resources of the data packets of each service data can be prepared in advance, and the retransmitted data packets are directly merged, thereby reducing the computational complexity and improving the demodulation performance of each service data packet.
  • the wireless communication method provided by the embodiment of the present invention determines the scrambling sequence corresponding to the service data to be sent by using the sixth retransmission information for indicating the number of retransmissions of the data packet of the service data.
  • the receiving device only needs to pass the scrambling sequence to determine the number of retransmissions of the data packet of the service data, and solves the problem that the signaling content included in the SA needs to be used to indicate the number of retransmissions of the service data packet in the prior art.
  • the problem of large signaling overhead reduces the signaling overhead in the SA, and enables the receiving device to know the number of retransmissions of subsequent service data in advance after parsing a service data packet, so that it is easy to prepare and receive subsequent data in advance.
  • FIG. 48 is a flowchart of a method for wireless communication provided by another embodiment of the present invention.
  • the wireless communication method can be used in a transmitting device of a D2D system.
  • the wireless communication method can indicate a communication parameter through a scrambling sequence so that the receiving device receives the data packet based on the communication parameter.
  • the information to be sent is the service data
  • the communication parameter of the information to be sent is the retransmission information.
  • the wireless communication method may include:
  • Step 2502 Determine, according to the seventh retransmission information, a scrambling sequence, where the seventh retransmission information is used to indicate a number of retransmissions of the data packet of the at least one service data after the data packet of the service data;
  • the correspondence between the number of retransmissions of the subsequent at least one service data packet and the scrambling sequence used by the data packet of the current service data is used as an example.
  • the relationship can be as shown in Table 2.
  • Step 2504 scrambling the CRC bit corresponding to the service data according to the scrambling sequence, to generate a scrambled CRC bit;
  • Step 2506 generating a data packet of the service data, where the data packet includes the scrambled CRC bit;
  • the receiving device adds the scrambled CRC bits after the service data to form uncoded information. Bit, encoding the uncoded information bits to generate a data packet of the service data.
  • Step 2508 the data packet is sent to the receiving device.
  • the sending device sends the data packet of the service data by using the D2D broadcast mode, and the receiving device that is within the coverage of the D2D signal of the sending device receives the data packet, and can use the table.
  • the four sets of sequences in 2 respectively descramble the CRC bits in the data packet, determine the sequence of successful descrambling as the scrambling sequence of the CRC bits, and query according to the correspondence relationship shown in Table 2 and the determined scrambling sequence.
  • the number of retransmissions of the data packet of at least one subsequent service data of the data packet where the number of retransmissions is 1, indicating that the data packet is transmitted only once. And receiving, according to the judgment result, a data packet of the subsequent at least one service data.
  • the sending device determines, according to the number of retransmissions of the data packet of the at least one service data after the data packet of the current service data, the scrambling sequence of the CRC bit of the data packet of the service data, so as to receive
  • the device can determine the number of retransmissions of the data packets of each service data subsequent to the data packet of the service data by parsing the scrambling sequence of the CRC bits of the data packet of the service data, and does not need to add a dedicated letter in the content of the scheduling signaling. Therefore, the signaling overhead is saved.
  • the instruction of the embodiment of the present invention can easily make an indication, thereby making The number of transmissions of data packets of each service data after each SA can be changed as needed, which improves the flexibility of the system.
  • the information to be sent is the scheduling signaling
  • the fifth retransmission information is used to indicate the data packet of each service data corresponding to the scheduling signaling.
  • the scheme of the number of retransmissions of the first data packet is combined, that is, the CRC scrambling sequence in one scheduling signaling indicates the number of retransmissions of the data packet of the first service data after the scheduling signaling, and the scheduling signal.
  • the CRC scrambling sequences of the data packets of the corresponding respective service data are each instructed to retransmit the number of retransmissions of the data packets of at least one service data after itself.
  • the wireless communication method provided by the embodiment of the present invention determines the current by using the seventh retransmission information for indicating the number of retransmissions of the data packet of the at least one service data after the data packet of the current service data.
  • the scrambling sequence corresponding to the service data to be sent, the receiving device only needs to pass the scrambling sequence to determine the number of retransmissions of the data packet of the at least one service data after the data packet of the service data, which solves the needs in the prior art.
  • the signaling content included in the SA is used to indicate the number of retransmissions of the service data packet, the signaling overhead in the SA is reduced, and the number of transmissions of each data packet after each SA can be changed as needed, thereby improving The flexibility of the system.
  • FIG. 49 is a flowchart of a method for wireless communication according to another embodiment of the present invention.
  • the wireless communication method can be used in a transmitting device of a D2D system.
  • the wireless communication method may indicate a communication parameter by a scrambling sequence so that the receiving device performs reception of the data packet according to the communication parameter.
  • the wireless communication method may include:
  • Step 2602 determining a scrambling sequence according to the identifier of the synchronization signal corresponding to the sending device.
  • each D2D device may be within the coverage of the base station, or may be outside the coverage of the base station, and is within the coverage of the base station.
  • the D2D device can directly synchronize with the base station, and in the D2D device that is outside the coverage of the base station, part of the D2D device can be used as a synchronization source device for transmitting the synchronization signal, and the remaining D2D devices receive the synchronization signal sent by the synchronization source device and Synchronize.
  • the non-synchronized source device can simultaneously receive synchronization signals sent by multiple synchronization source devices, and The synchronization source device with the strongest signal is synchronized. Therefore, the synchronization source device corresponding to the sending device and the receiving device may not be the same device, thereby affecting the quality of the D2D communication.
  • the sending device may indicate the synchronization source device corresponding to the sending device by using a scrambling sequence of the scheduling signaling, so that the receiving device receives the scrambling sequence of the scheduling signaling and the sending device. Synchronize to the same sync source device to improve communication quality.
  • the identifiers of the synchronization signals sent by each synchronization device are different, and a one-to-one correspondence between the identifiers of the scrambling sequences and the synchronization signals may be preset to be known for each D2D device, and sent.
  • the device may determine the scrambling sequence according to the identifier of the synchronization signal corresponding thereto and the correspondence between the identifier of the preset synchronization signal and the scrambling sequence.
  • Step 2604 Perform scrambling on the CRC bit corresponding to the scheduling signaling according to the scrambling sequence to generate a scrambled CRC bit.
  • Step 2606 generating a data packet of the scheduling signaling, where the data packet includes the scrambled CRC bit;
  • the receiving device adds the scrambled CRC bits to the scheduling signaling to form uncoded information bits, and encodes the uncoded information bits to generate a data packet of the scheduling signaling.
  • Step 2608 the data packet is sent to the receiving device.
  • the sending device and the receiving device Take the sending device and the receiving device as the terminal device of the D2D system as an example, and the sending device passes the D2D.
  • the data packet of the scheduling signaling is sent in a broadcast manner, and after receiving the data packet of the scheduling signaling, the receiving device in the coverage of the signal of the D2D of the transmitting device first determines the scrambling corresponding to the identifier of each synchronization signal received by the receiving device.
  • the sequence specifically, the receiving device may determine, according to the identifier of each received synchronization signal and the correspondence between the scrambling sequence and the identifier of the synchronization signal, a scrambling sequence corresponding to the identifier of each received synchronization signal, The receiving device separately descrambles the CRC bits in the data packet by using the determined sequence, determines that the sequence of successful descrambling is a scrambling sequence of the CRC bits in the data packet of the scheduling signaling, and according to the scrambling sequence of the CRC bits
  • the identifier of the corresponding synchronization signal is synchronized with the transmitting device to the same synchronization source device.
  • the wireless communication method provided by the embodiment of the present invention determines the scrambling sequence corresponding to the scheduling signaling to be sent according to the identifier of the synchronization signal corresponding to the sending device, and the receiving device only needs to pass the scrambling sequence. Determining the synchronization source device of the transmitting device solves the problem of demodulation performance degradation caused by different synchronization sources referenced by the transceiver in the prior art, thereby improving the demodulation performance of the receiver.
  • FIG. 50 a flow chart of a method for wireless communication according to another embodiment of the present invention is shown. The wireless communication method can be used in a transmitting device of a D2D system.
  • the wireless communication method can indicate a communication parameter through a scrambling sequence so that the receiving device receives the data packet based on the communication parameter.
  • the information to be sent is the scheduling signaling, and the communication parameter of the to-be-sent information is the identification information of the data packet.
  • the wireless communication method may include:
  • Step 2702 Determine a scrambling sequence according to the identifier indicated in the scheduling signaling, where the identifier indicated in the scheduling signaling is used to identify the identifier information of the data packet.
  • the identification information of the data packet may be used to indicate to the receiving device whether the data packet is a data packet corresponding to the receiving device.
  • the identifier indicated in the scheduling signaling may be an identifier of the receiving device that receives the service data corresponding to the scheduling signaling, or may be another type of identifier, and only the identifier may indicate which device is the scheduling signaling.
  • the receiving device of the corresponding business data is sufficient.
  • the data packet of the scheduling signaling may include all the bit information of the identifier indicated in the scheduling signaling, or may only include part of the bit information of the identifier indicated in the scheduling signaling, and the remaining part of the bit information is hidden.
  • the data packet of the scheduling signaling includes all the bit information of the identifier indicated in the scheduling signaling, determining the scrambling sequence according to the bit information at the designated position in the identifier of the sending device;
  • the data packet contains some bits of the identifier indicated in the scheduling signaling In the information, the scrambling sequence ⁇
  • the identifier indicated in the scheduling signaling is 8 bits
  • the scrambling sequence is 16 bits.
  • the last 2 bits in the identifier indicated by the scheduling signaling may correspond to four groups of scrambling sequences, which are used to indicate four different
  • the corresponding relationship is as shown in Table 3, where a and b respectively represent the second-to-last and last digits of the identifier indicated in the scheduling signaling, and the transmitting device may follow the indication indicated in the scheduling signaling.
  • the two lookup table 3 determines the scrambling sequence of the CRC bits of the scheduling signaling.
  • the 8-bit bit in the identifier indicated by the scheduling signaling may be completely included in the data packet of the scheduling signaling, and the last two bits correspond to the scrambling sequence; or the first 6 of the identifiers indicated in the scheduling signaling
  • the bit bits are included in the data packet of the scheduling signal, corresponding to the last 2 bits of the scrambling sequence.
  • Step 2704 Perform scrambling on the CRC bit corresponding to the scheduling signaling according to the scrambling sequence to generate a scrambled CRC bit.
  • Step 2706 generating a data packet of the scheduling signaling, where the data packet includes the scrambled CRC bit;
  • the receiving device adds the scrambled CRC bits to the scheduling signaling to form uncoded information bits, and encodes the uncoded information bits to generate a data packet of the scheduling signaling.
  • Step 2708 the data packet is sent to the receiving device.
  • the sending device and the receiving device are terminal devices of the D2D system, and the sending device sends the data packet of the scheduling signaling by using a D2D broadcast manner, and the receiving device that is within the coverage of the D2D signal of the sending device receives the data packet of the scheduling signaling. And determining, according to the parsed scrambling sequence, the identifier indicated in the scheduling signaling, and determining whether it is the destination device of the data packet of the scheduling signaling, and if yes, parsing the content of the scheduling signaling and receiving the identifier The data packet of each service data corresponding to the signaling is scheduled, otherwise the data packet of the scheduling signaling is discarded.
  • the wireless communication method determines the scrambling sequence corresponding to the scheduling signaling to be sent according to the identifier information of the data packet used to represent the scheduling signaling, and the receiving device only needs to pass the adding
  • the scrambling sequence can determine whether the sending device is the destination device of the data packet of the scheduling signaling, and solves the problem that the receiving device needs to decode each received data packet including scheduling signaling according to the prior art.
  • the content of the data packet receiving the business data achieves the effect of reducing resource consumption and improving system communication efficiency.
  • FIG. 51 shows a method flow of a wireless communication method according to an embodiment of the present invention.
  • the wireless communication method can be used in a receiving device of a D2D (Device to Device) device.
  • the wireless communication method can include:
  • Step 2802 Receive a data packet sent by the sending device, where the data packet includes a scrambled cyclic redundancy check CRC bit.
  • Step 2804 parsing the scrambling sequence according to the scrambled CRC bits
  • Step 2806 determining, according to the scrambling sequence, a communication parameter of information included in the data packet; Step 2808, performing, according to the communication parameter, each data packet sent by the sending device to receive processing;
  • the communication parameter is used to indicate retransmission information, a synchronization signal corresponding to the sending device, or identification information of the data packet.
  • the wireless communication method provided by the embodiment of the present invention obtains a communication parameter for indicating a retransmission information, a synchronization signal corresponding to a transmitting device, or a destination device of the data packet by parsing a CRC scrambling sequence of the data packet after receiving the data packet. And receiving and processing each data packet sent by the sending device according to the communication parameter, and the receiving device only needs to parse the CRC scrambling sequence of each data packet when receiving the data packet to determine the retransmission information, synchronization information or data of the data packet.
  • the identification information of the packet is low in computational complexity, and solves the problem that the receiving device needs to decode each received data packet including scheduling signaling and receive the data packet of the service data according to the content of the scheduling signaling.
  • FIG. 52 there is shown a flow chart of a method of wireless communication provided by another embodiment of the present invention, which may be used in a receiving device of a D2D (Device to Device) device.
  • the wireless communication method can include:
  • Step 2902 Receive a data packet sent by the sending device, where the data packet includes a scrambled cyclic redundancy check CRC bit.
  • the information contained in the data packet may be for scheduling signaling.
  • steps of the sending device to generate the data packet refer to the steps in the embodiment corresponding to FIG. 43 , and details are not described herein again.
  • Step 2904 parsing the scrambling sequence according to the scrambled CRC bits
  • the receiving device can separately descramble the CRC bits in the data packet using the two sets of sequences in Table 1, and determine that the sequence of successful descrambling is the scrambling sequence of the CRC bits.
  • Step 2906 Determine, according to the scrambling sequence, a communication parameter of information included in the data packet, where the communication parameter is first retransmission information used to indicate whether the data packet is a retransmission data packet.
  • Step 2908 Determine, according to the first retransmission information, whether the data packet is a retransmission data packet, and receive the data packet according to the determination result.
  • the receiving device may determine, according to the correspondence relationship shown in Table 1 and the determined scrambling sequence, whether the data packet is a retransmission or a new transmission.
  • the cache data corresponding to the same scheduling signaling of the previous or multiple times of receiving the packet needs to be saved, and a new buffer for the next retransmission packet is prepared, and these are corresponding at the baseband.
  • the different retransmission data of the same scheduling signaling is combined, and then the combined data packet is decoded once, without having to decode each retransmission packet separately, reducing the number of decodings and improving the translation.
  • the performance of the code if the data packet is a new transport packet, the baseband data of the data packet of the previous scheduling signaling in the physical layer cache may be cleared, and the buffer for receiving the new transport packet is prepared.
  • the receiving device can determine whether the data packet of the scheduling signaling is a retransmitted data packet or a newly transmitted data packet by parsing a scrambling sequence of the CRC bits of the scheduling signaling, so that the demodulation is prepared in advance. Resources and consolidation methods to improve reception efficiency.
  • the receiving device may also combine the data packet with other data packets of the same scheduling signaling, and perform decoding only on the combined multiple data packets. For users with limited coverage, Reduce the number of decoding and improve decoding performance.
  • the wireless communication method provided by the embodiment of the present invention can determine whether the data packet is a retransmission data packet according to the CRC scrambling sequence in the data packet of the scheduling signaling, and can prepare resources and merge for demodulation in advance.
  • the method solves the problem that the receiving device needs to decode each received data packet including scheduling signaling and receive the data packet of the service data according to the content of the scheduling signaling in the prior art, and the user with limited coverage The number of decoding attempts is reduced, and the effect of reducing resource consumption and improving system communication efficiency is achieved.
  • FIG. 53 there is shown a flow chart of a method for wireless communication provided by another embodiment of the present invention, which can be used in a receiving device of a D2D (Device to Device) device.
  • the wireless communication method can include:
  • Step 3002 Receive a data packet sent by the sending device, where the data packet includes a scrambled cyclic redundancy check CRC bit.
  • the CRC bit contained in the data packet is determined by the transmitting device based on the number of retransmissions of the data packet, and is scrambled according to the determined scrambling sequence.
  • the number of retransmissions of the data packets of each scheduling signaling is the same in a predefined period. In this embodiment, the number of retransmissions of each data packet carrying different scheduling signaling is the same in a large period.
  • SA Service Assignment
  • each SA For a packet of scheduling signaling the number of retransmissions of SA ⁇ SAn is the same, both are 2, and the scrambling sequence used by each SA corresponds to the second sequence in Table 2.
  • the so-called large period refers to a period in which the interval in which the SA occurs in a periodic manner is larger.
  • the interval between two adjacent SAs is 40ms (milliseconds), and the SA occurs periodically according to this interval.
  • a large period can be defined as 1000ms, which is equivalent to Is (seconds).
  • a large period can be defined as 1024ms.
  • Step 3004 Parse the scrambling sequence according to the scrambled CRC bits.
  • the receiving device can use the four sets of sequences in Table 2 to descramble the CRC bits in the data packet respectively, and determine that the sequence of successful descrambling is the addition of the CRC bit. Scrambling sequence.
  • Step 3006 Determine, according to the scrambling sequence, a communication parameter of information included in the data packet, where the communication parameter is second retransmission information used to indicate the number of retransmissions of the data packet;
  • Step 3008 Receive the data packet according to the number of retransmissions of the data packet.
  • the receiving device may determine the number of retransmissions of the data packet according to the correspondence relationship shown in Table 2 and the determined scrambling sequence, and prepare to be used according to the number of retransmission times.
  • Each retransmission packet is buffered, and these different retransmission data packets corresponding to the same scheduling signaling are combined at the baseband. For example, if it is determined that the number of retransmissions of a new SA received is 2, a buffer for 2 packets is prepared for the SA, and if the number of retransmissions of the next new SA is determined to be 3, the next is An SA is ready for caching of 3 packets.
  • the receiving device cannot obtain any control signaling about the format and retransmission information of the SA before receiving the SA. If the retransmitted information is placed in the SA packet, the signaling overhead needs to be increased, and Because the number of retransmissions of the SA cannot be known, the content of the SA can only be parsed one by one, and the probability of parsing failure is high. It is often necessary to try to obtain the retransmission packet of the SA multiple times. In the method shown in the embodiment of the present invention, it is not necessary to add an additional signaling indication in the SA, and the retransmission sequence of the CRC can implicitly indicate the number of retransmissions of the SA, which not only saves the number of retransmissions.
  • the signaling overhead, and the number of retransmissions of the entire SA packet is given before the SA content is demodulated, so that the receiving device of the SA can directly receive the subsequent data packet of the corresponding retransmission number and combine it to reduce the reception.
  • the number of attempts by the device to obtain the retransmission packet of the SA reduces the computational complexity and improves the demodulation of the SA.
  • the receiving device determines the number of retransmissions of the scheduling signaling data packet by parsing the scrambling sequence of the CRC bits in the scheduling signaling data packet, and before demodulating the data packet of the scheduling signaling, The number of data packets that need to be combined and decoded and decoded is determined, thereby improving the accuracy of decoding, reducing the number of attempts of the receiving device, and improving the communication performance of the system.
  • the wireless communication method provided by the embodiment of the present invention determines a second retransmission of the number of retransmissions of the data packet used to indicate the scheduling signaling by parsing the CRC scrambling sequence used by the data packet of the scheduling signaling.
  • the information solves the problem that the receiving device needs to decode each received data packet including scheduling signaling and receive the data packet of the service data according to the content of the scheduling signaling in the prior art, thereby achieving the effect of reducing resource consumption;
  • the receiving device can also know how many packets can be combined and demodulated and decoded before demodulation, thereby improving the correctness of the decoding and reducing the unnecessaryness of the receiver.
  • FIG. 54 there is shown a flow chart of a method of wireless communication provided by another embodiment of the present invention, which may be used in a receiving device of a D2D (Device to Device) device.
  • the wireless communication method can include:
  • Step 3102 Receive a data packet sent by the sending device, where the data packet includes a scrambled cyclic redundancy check CRC bit.
  • the data packet is a data packet for scheduling signaling, and the scrambling sequence for scrambling the CRC bits of the scheduling signaling is determined by the transmitting device according to the number of retransmissions of the scheduling signaling or the number of retransmissions of the next scheduling signaling.
  • the scrambling sequence for scrambling the CRC bits of the scheduling signaling is determined by the transmitting device according to the number of retransmissions of the scheduling signaling or the number of retransmissions of the next scheduling signaling.
  • Step 3104 Parse the scrambling sequence according to the scrambled CRC bits.
  • the receiving device can use the four sets of sequences in Table 2 to descramble the CRC bits in the data packet respectively, and determine that the sequence of successful descrambling is the addition of the CRC bit. Scrambling sequence.
  • Step 3106 Determine, according to the scrambling sequence, a communication parameter of information included in the data packet; the communication parameter is a number of retransmissions of the data packet or a retransmission number of a data packet of a subsequent scheduling signaling; and the receiving device acquires the sending a scrambling sequence of the data packet of the previous scheduling signaling sent by the device; determining whether the scrambling sequence is the same as the scrambling sequence of the data packet of the previous scheduling signaling; if the judgment result is the scrambling sequence and the previous one If the scrambling sequence of the data packet of the scheduling signaling is the same, determining that the scrambling sequence is the third retransmission information for indicating the number of retransmissions of the data packet; if the judgment result is the scrambling sequence Different from the scrambling sequence of the data packet of the previous scheduling signaling, the scrambling sequence is determined to be the fourth retransmission information for indicating the number of retransmissions of the data packet of the next scheduling signaling.
  • the receiving device determines the number of retransmissions of the data packet of the current scheduling signaling and the number of retransmissions of the data packet of the next scheduling signaling according to the judgment result and the correspondence relationship shown in Table 2.
  • the receiving device determines that the number of retransmissions indicated by the scrambling sequence used by the SA of the received new scheduling signaling is the same as the number of retransmissions used by the actual SA, determining the SA of the next scheduling signaling to be received.
  • the number of retransmissions is the same as the number of retransmissions of the SA of the currently received scheduling signaling. If the receiving device determines that the number of retransmissions indicated by the scrambling sequence used by the SA of the current scheduling signaling is different from the number of retransmissions actually used, determining the number of retransmissions of the SA of the next scheduling signaling to be received.
  • the number of retransmissions of the SA that is currently received by the scheduling signaling is different; the receiving device determines the number of retransmissions of the SA of the current scheduling signaling and the number of retransmissions of the SA of the next scheduling signaling to be received according to Table 2.
  • Step 3108 Receive, according to the communication parameter, each data packet sent by the sending device.
  • the receiving device prepares a buffer for the current data packet and the next data packet of the scheduling signaling to be received according to the determined communication parameter, and receives the merged corresponding retransmission data packet.
  • the receiving device may determine, according to Table 2, the number of retransmissions of the SA of the current scheduling signaling and the number of retransmissions of the SA of the next scheduling signaling to be received, and accordingly, the SA of the new scheduling signaling and The SA of the next scheduling signaling allocates a buffer, and prepares the next scheduling signaling SA to receive the number of merges in advance.
  • the receiving device cannot obtain any control signaling about the format and retransmission information of the SA before receiving the SA. If the retransmitted information is placed in the SA packet, the signaling overhead needs to be increased, and Because the number of retransmissions of the SA cannot be known, the content of the SA can only be parsed one by one, and the probability of parsing failure is high. It is often necessary to try to obtain the retransmission packet of the SA multiple times.
  • the scrambling sequence of the CRC can implicitly indicate the number of retransmissions of the next SA to be received, which not only saves Indicates the signaling overhead of the number of retransmissions, and gives the number of retransmissions of the entire SA packet before demodulating the SA content, so that the receiving device of the SA can directly receive the subsequent data packet of the corresponding retransmission number.
  • the combination is performed to reduce the number of attempts by the receiving device to obtain the retransmission packet of the SA, which reduces the computational complexity and improves the demodulation performance of the SA.
  • the wireless communication method provided by the embodiment of the present invention is based on the current scheduling signaling.
  • the CRC scrambling sequence in the data packet determines the number of retransmissions of the data packet and the number of retransmissions of the data packet of the next scheduling signaling, and the receiving device only needs to compare the actual number of retransmissions of the current scheduling signaling with the current scheduling.
  • the scrambling sequence used by the signaling can determine the number of retransmissions of the data packet of the next scheduling signaling, thereby reducing the number of attempts to obtain the next scheduling signaling, and solving the prior art that the receiving device needs to receive each received
  • a packet containing the scheduling signaling is decoded and receives the data packet of the service data according to the content of the scheduling signaling, thereby achieving the effect of reducing resource consumption and improving system communication efficiency.
  • FIG. 55 is a flowchart of a method for wireless communication provided by another embodiment of the present invention.
  • the wireless communication method can be used in a receiving device of a D2D (Device to Device) device.
  • the wireless communication method can include:
  • Step 3202 Receive a data packet sent by the sending device, where the data packet includes a scrambled cyclic redundancy check CRC bit.
  • the data packet is a data packet for scheduling signaling, and the scrambling sequence for scrambling the CRC bits in the data packet is determined by the transmitting device according to the number of retransmissions of the data packets of the respective service data corresponding to the scheduling signaling.
  • the sending device to generate the data packet refer to the steps in the embodiment corresponding to FIG. 46, and details are not described herein again.
  • Step 3204 Parse the scrambling sequence according to the scrambled CRC bits.
  • the receiving device can use the four sets of sequences in Table 2 to descramble the CRC bits in the data packet respectively, and determine that the sequence of successful descrambling is the addition of the CRC bit. Scrambling sequence.
  • Step 3206 Determine a communication parameter of the information included in the data packet according to the scrambling sequence; the communication parameter is a fifth retransmission information; the fifth retransmission information is used to indicate data of each service data corresponding to the scheduling signaling. The number of retransmissions of the packet, or the fifth retransmission information is used to indicate the number of retransmissions of the first data packet in the data packet of each service data corresponding to the scheduling signaling;
  • the receiving device may determine the number of retransmissions of the data packets of the respective service data corresponding to the scheduling signal according to the correspondence relationship shown in Table 2 and the determined scrambling sequence.
  • Step 3208 Receive, according to the fifth retransmission information, a data packet of each service data corresponding to the scheduling signaling.
  • the retransmission times of the data packets of the service data corresponding to the scheduling signaling are the same when the fifth retransmission information is used to indicate the number of retransmissions of the data packets of the service data corresponding to the scheduling signaling.
  • the receiving device may prepare a buffer for retransmission packets of each service data according to the number of retransmissions, or prepare a buffer for retransmission packets of the first service data in each service data, and directly receive each service data. Retransmit the package and merge.
  • the sending device determines the scrambling sequence of the CRC bits of the scheduling signaling according to the service data corresponding to the scheduling signaling or the number of retransmissions of the data packet of the first service data in each service data.
  • the receiving device can determine the number of retransmissions of the service data corresponding to the scheduling signaling or the data packet of the first service data in each service data by parsing the scrambling sequence of the CRC bits of the scheduling signaling, and does not need to be scheduled. Special signaling is added to the content of the signaling, which saves signaling overhead.
  • the sending device determines the number of retransmissions of the data packet of the service data according to the scrambling sequence in the data packet of the scheduling signaling, and can prepare the resource of the data packet of each service data in advance, and directly merge the retransmitted data packets.
  • the computational complexity is reduced and the demodulation performance of each service data packet is improved.
  • the wireless communication method provided by the embodiment of the present invention determines the service data corresponding to the scheduling signaling or the data of the first service data in each service data by scheduling a CRC scrambling sequence of the data packet of the scheduling signaling.
  • the number of retransmissions of the packet solves the problem that the prior art needs to use the signaling content included in the SA to indicate the number of retransmissions of the service data packet, reduces the signaling overhead in the SA, and enables the receiver to know the SA in advance.
  • the number of retransmissions of service data facilitates the preparation and merging of subsequent data in advance, reduces computational complexity, and improves demodulation performance of each service data packet.
  • FIG. 56 a flow chart of a method for wireless communication provided by another embodiment of the present invention, which can be used in a receiving device of a D2D (Device to Device) device, is shown.
  • the wireless communication method can include:
  • Step 3302 Receive a data packet sent by the sending device, where the data packet includes a scrambled cyclic redundancy check CRC bit.
  • the data packet is a data packet of the service data, where the number of retransmissions of the data packets of different service data between the data packets of two adjacent scheduling signalings is the same.
  • the sending device to generate the data packet refer to the steps in the embodiment corresponding to FIG. 47, and details are not described herein again.
  • Step 3304 Parse the scrambling sequence according to the scrambled CRC bits.
  • the receiving device can use the four sets of sequences in Table 2 to descramble the CRC bits in the data packet respectively, and determine that the sequence of successful descrambling is the addition of the CRC bit. Scrambling sequence.
  • Step 3306 Determine, according to the scrambling sequence, a communication parameter of information included in the data packet; the communication parameter is a sixth retransmission information used to indicate a number of retransmissions of the data packet;
  • the receiving device determines the number of retransmissions of the data packet of the service data according to the correspondence relationship shown in Table 2 and the determined scrambling sequence.
  • Step 3308 Receive each data packet including the service data according to the number of retransmissions of the data packet.
  • the receiving device can prepare a buffer for each retransmission packet according to the number of retransmissions, and combine the different retransmission data packets corresponding to the same scheduling signaling at the baseband.
  • the number of retransmissions of data packets of different service data between data packets of two adjacent scheduling signalings is the same.
  • a service data (DATA) transmission diagram where SA1 and SA2 contain n different service data packets, respectively DATA! ⁇ DATA n , each DATA retransmission The number of times is 2, and the scrambling sequence used by each DATA corresponds to the second set of sequences in FIG.
  • the sending device determines, according to the number of retransmissions of the data packet of the service data, a scrambling sequence of the CRC bit of the data packet of the service data, so that the receiving device passes the CRC bit of the data packet of the service data.
  • the scrambling sequence can determine the number of retransmissions of the data packet of the service data, and does not need to add dedicated signaling in the content of the scheduling instruction, thereby saving signaling overhead.
  • the receiving device since the number of retransmissions of data packets of different service data between the data packets of two adjacent scheduling signaling is the same, the receiving device only needs to parse the data packet of one service data to determine other subsequent service data.
  • the number of retransmissions of the data packet so that the resources of the data packets of each service data can be prepared in advance, and the retransmitted data packets are directly merged, thereby reducing the computational complexity and improving the demodulation performance of each service data packet.
  • the wireless communication method provided by the embodiment of the present invention determines the sixth retransmission information for indicating the number of retransmissions of the data packet of the service data by using the CRC scrambling sequence corresponding to the data packet of the service data.
  • the signaling content included in the SA is used to indicate that the signaling overhead caused by the number of retransmissions of the service data packet is large, the signaling overhead in the SA is reduced, and the receiving device is parsing a service data.
  • the number of retransmissions of the subsequent service data can be known in advance, so that the subsequent data reception and merging can be prepared in advance, the computational complexity is reduced, and the demodulation performance of each service data packet is improved.
  • FIG. 57 shows a method flow of a wireless communication method according to another embodiment of the present invention.
  • the wireless communication method can be used in a receiving device of a D2D (Device to Device) device.
  • the wireless communication method can include:
  • Step 3402 Receive a data packet sent by the sending device, where the data packet includes a scrambled cyclic redundancy check CRC bit.
  • the data packet is a data packet of service data, and the CRC scrambling sequence of the data packet is determined by the transmitting device according to the number of retransmissions of the data packet of at least one service data after the monthly data packet.
  • the specific method for generating the data packet refer to the steps in the embodiment corresponding to FIG. 48, and details are not described herein again.
  • Step 3404 Parse the scrambling sequence according to the scrambled CRC bits.
  • the receiving device can use the four sets of sequences in Table 2 to descramble the CRC bits in the data packet respectively, and determine that the sequence of successful descrambling is the addition of the CRC bit. Scrambling sequence.
  • Step 3406 Determine, according to the scrambling sequence, a communication parameter of information included in the data packet; the communication parameter is a seventh weight of a retransmission number of the data packet of the at least one service data after the data packet indicating the service data. Transmitting information;
  • the receiving device may query the number of retransmissions of the data packet of the subsequent at least one service data of the data packet according to the correspondence relationship shown in Table 2 and the determined scrambling sequence.
  • Step 3408 Receive, according to the number of retransmissions of the data packet of the at least one service data after the data packet, the data packet of the at least one service data.
  • the receiving device may prepare a method of buffering and merging in advance according to the number of retransmissions of the data packet of the at least one service data subsequent to the data packet.
  • the sending device determines, according to the number of retransmissions of the data packet of the at least one service data after the data packet of the current service data, the scrambling sequence of the CRC bit of the data packet of the service data, so as to receive
  • the device can determine the number of retransmissions of the data packets of each service data subsequent to the data packet of the service data by parsing the scrambling sequence of the CRC bits of the data packet of the service data, and does not need to add dedicated signaling in the content of the scheduling instruction. , saving signaling overhead.
  • the instruction of the embodiment of the present invention can easily make an indication, thereby making The number of transmissions of data packets of each service data after each SA can be changed as needed, which improves the flexibility of the system.
  • the information to be sent is the scheduling signaling
  • the fifth retransmission information is used to indicate the service data corresponding to the scheduling signaling.
  • the combination of the number of retransmissions of the first data packet in the data packet, that is, the CRC scrambling sequence in one scheduling signaling indicates the number of retransmissions of the data packet of the first service data after the scheduling signaling
  • the The CRC scrambling sequence of the data packets of the respective service data corresponding to the scheduling signaling each indicates the number of retransmissions of the data packets of the at least one service data after itself.
  • the wireless communication method determines the number of retransmissions of data packets of at least one service data after the data packet of the current service data according to the CRC scrambling sequence of the data packet of the current service data.
  • the problem that the signaling content included in the SA is used to indicate the number of retransmissions of the service data packet is reduced, the signaling overhead in the SA is reduced, and the number of transmissions of each data packet following each SA can be determined according to Need to change, thus increasing the flexibility of the system.
  • FIG. 58 a flow chart of a method for wireless communication according to another embodiment of the present invention is shown.
  • the wireless communication method can be used in a receiving device of a D2D (Device to Device) device.
  • the wireless communication method can include:
  • Step 3502 Receive a data packet sent by the sending device, where the data packet includes a scrambled cyclic redundancy check CRC bit.
  • the data packet is a data packet for scheduling signaling, and the CRC scrambling sequence of the data packet is determined by the transmitting device according to the identifier of its own corresponding synchronization signal.
  • the sending device to generate the data packet refer to the steps in the embodiment corresponding to FIG. 49, and details are not described herein again.
  • Step 3504 Parse the scrambling sequence according to the scrambled CRC bits.
  • the receiving device may first determine a scrambling sequence corresponding to the identifier of each synchronization signal received by the receiving device. Specifically, the receiving device may according to each received synchronization. The identifier of the signal and the correspondence between the scrambling sequence and the identifier of the synchronization signal determine a scrambling sequence corresponding to the identifiers of the received synchronization signals, and the receiving device respectively solves the CRC bits in the data packet by using the determined sequence. The sequence of the CRC bits in the data packet of the scheduling signaling is determined by the sequence of the descrambling success.
  • Step 3506 Determine, according to the scrambling sequence, a communication parameter of information included in the data packet; the communication parameter is used to indicate an identifier of a synchronization signal corresponding to the sending device;
  • the receiving device determines the identity of the synchronization signal according to the scrambling sequence and the correspondence between the identifier of the pre-set synchronization signal and the scrambling sequence.
  • Step 3508 the synchronization device corresponding to the identifier of the synchronization signal performs signal synchronization, and is completed. After synchronization, each data packet sent by the sending device is received.
  • the receiving device synchronizes with the transmitting device to the same synchronization source device according to the identifier of the synchronization signal corresponding to the scrambling sequence of the CRC bit.
  • the wireless communication method determines the identifier of the synchronization signal corresponding to the sending device by parsing the CRC scrambling sequence in the scheduling signaling, and synchronizes with the sending device according to the identifier of the synchronization signal.
  • a synchronization source device solves the problem of demodulation performance degradation caused by different synchronization sources of the transceiver reference of the communication in the prior art, thereby improving the demodulation performance of the receiver.
  • FIG. 59 is a flowchart of a method for wireless communication provided by another embodiment of the present invention.
  • the wireless communication method can be used in a receiving device of a D2D (Device to Device) device. Taking the received data packet as a data packet of the scheduling instruction as an example, the wireless communication method may include:
  • Step 3602 Receive a data packet sent by the sending device, where the data packet includes a scrambled cyclic redundancy check CRC bit.
  • the data packet is a data packet of the scheduling instruction, and the sending device determines the scrambling sequence of the data packet according to the identifier indicated in the scheduling instruction.
  • the sending device determines the scrambling sequence of the data packet according to the identifier indicated in the scheduling instruction.
  • Step 3604 Parse the scrambling sequence according to the scrambled CRC bits.
  • the receiving device can use the two sets of sequences in Table 3 to descramble the CRC bits in the data packet respectively, and determine that the sequence of successful descrambling is the addition of the CRC bit. Scrambling sequence.
  • Step 3606 determining, according to the scrambling sequence, a communication parameter of information included in the data packet; the communication parameter is an identifier indicated in the scheduling signaling;
  • the identifier indicated in the scheduling signaling is used to identify the identifier information of the data packet.
  • the receiving device may determine the identifier indicated in the scheduling signaling according to the parsed scrambling sequence and the correspondence between the scrambling sequence shown in Table 3 and the identifier indicated in the scheduling signaling.
  • Step 3608 Receive, according to the identifier indicated in the scheduling signaling, each data packet that is sent by the sending device and that includes scheduling signaling.
  • the identifier information of the data packet may be used to indicate, by the receiving device, whether the data packet is a data packet corresponding to the receiving device. If the receiving device determines that the data packet is a data packet corresponding to the receiving device, decoding the data packet and other subsequent steps; if the receiving device determines the data If the packet is not the data packet received by the receiving device, the packet is discarded.
  • the wireless communication method determines a corresponding scrambling sequence by parsing a data packet of the scheduling instruction, and determines identification information of the data packet according to the determined scrambling sequence, according to the identifier of the data packet.
  • the information is determined whether the data packet is a data packet that is received by the receiving device, and the data that the receiving device needs to decode each received data packet including the scheduling signaling and receive the service data according to the content of the scheduling instruction is solved.
  • the problem of the package is to reduce the resource consumption and improve the efficiency of system communication.
  • FIG. 60 a system configuration diagram of a wireless communication system according to an embodiment of the present invention is shown.
  • the wireless communication system can be a D2D system.
  • the wireless communication system can include:
  • the transmitting device 400 as shown in any of the above Figures 1-3, 6, 8, 10, 12-14 or 15-23 and the receiving device 800 as shown in any of the above Figs. 24-41.
  • the sending device carries the communication parameter of the information to be sent by using the scrambling sequence, and after receiving the data packet of the information to be sent, the receiving device parses the scrambling sequence.
  • the receiving device parses the scrambling sequence.
  • the CRC scrambling sequence of the data packet can determine the retransmission information, the synchronization information or the identification information of the data packet, and the computational complexity is low, which solves the problem that the receiving device needs to receive the scheduling signaling for each received in the prior art.
  • the data packet is decoded and receives the data packet of the service data according to the content of the scheduling instruction, thereby achieving the effect of reducing resource consumption and improving system communication efficiency.
  • a person skilled in the art may understand that all or part of the steps of implementing the above embodiments may be completed by hardware, or may be instructed by a program to execute related hardware, and the program may be stored in a computer readable storage medium.
  • the storage medium mentioned may be a read only memory, a magnetic disk or an optical disk or the like. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., which are within the spirit and scope of the present invention, should be included in the protection of the present invention. Within the scope

Abstract

L'invention concerne un dispositif d'envoi, un dispositif de réception, et un procédé et un système de communication sans fil, lesquels se rapportent au domaine des communications sans fil. Le dispositif d'envoi comprend: un module de détermination de séquence permettant de déterminer une séquence de brouillage correspondante en fonction d'un paramètre de communication d'informations devant être envoyées; un module de brouillage pour brouiller un bit de vérification de redondance cyclique (CRC) correspondant aux informations devant être envoyées en fonction de la séquence de brouillage de manière à générer un bit CRC brouillé; un module de génération de paquets de données afin de générer un paquet de données des informations devant être envoyées; et un module d'envoi pour envoyer le paquet de données vers le dispositif de réception. Grâce à la séquence de brouillage qui supporte le paramètre de communication des informations à envoyer et au dispositif de réception qui acquiert le paramètre de communication en analysant la séquence de brouillage après la réception du paquet de données, la présente invention permet de résoudre le problème de l'art antérieur selon lequel un dispositif de réception doit décoder chaque paquet de données reçu comprenant une signalisation de planification, ce qui permet de réduire la consommation de ressources et d'améliorer l'efficacité de communication du système.
PCT/CN2014/076927 2014-05-07 2014-05-07 Dispositif d'envoi, dispositif de réception, et procédé et système de communication sans fil WO2015168873A1 (fr)

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CN201480078387.0A CN106233648B (zh) 2014-05-07 2014-05-07 发送设备、接收设备、无线通信方法及系统

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