WO2018133720A1 - 反馈信息传输方法及装置 - Google Patents

反馈信息传输方法及装置 Download PDF

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Publication number
WO2018133720A1
WO2018133720A1 PCT/CN2018/072110 CN2018072110W WO2018133720A1 WO 2018133720 A1 WO2018133720 A1 WO 2018133720A1 CN 2018072110 W CN2018072110 W CN 2018072110W WO 2018133720 A1 WO2018133720 A1 WO 2018133720A1
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WIPO (PCT)
Prior art keywords
terminal
data
feedback information
information
feedback
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PCT/CN2018/072110
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English (en)
French (fr)
Inventor
赵振山
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华为技术有限公司
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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 EP18741024.6A priority Critical patent/EP3554033A4/en
Priority to BR112019014657A priority patent/BR112019014657A2/pt
Publication of WO2018133720A1 publication Critical patent/WO2018133720A1/zh
Priority to US16/503,265 priority patent/US11343801B2/en
Priority to US17/720,096 priority patent/US11856579B2/en
Priority to US18/516,627 priority patent/US20240163876A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607—Details of the supervisory signal
    • H04L1/1664—Details of the supervisory signal the supervisory signal being transmitted together with payload signals; piggybacking
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607—Details of the supervisory signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607—Details of the supervisory signal
    • H04L1/1671—Details of the supervisory signal the supervisory signal being transmitted together with control information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1864—ARQ related signaling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2614—Peak power aspects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0055—Physical resource allocation for ACK/NACK
    • 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
    • H04L2001/0092—Error control systems characterised by the topology of the transmission link
    • H04L2001/0093—Point-to-multipoint
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/18—Interfaces between hierarchically similar devices between terminal devices

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a feedback information transmission method and apparatus.
  • D2D communication is a technology that supports direct data communication between mobile devices and mobile devices using dedicated air interface technology.
  • the biggest difference from the traditional cellular communication technology is that the communication between the terminal and the terminal no longer requires the relay of the base station to directly communicate, and the base station can perform resource configuration, scheduling, coordination, etc., thereby facilitating direct communication between the terminals. .
  • D2D technology is discussed in 3GPP. In Rel.12 of Long Term Evolution (LTE), D2D technology uses broadcast to transmit data. It contains two features: discovery and communication. ). Discovery is the periodic broadcast information of the terminal, so that the terminal around him can detect the information and discover the user; Communication is the direct transmission of data between the two terminals, using Scheduling Assignment (SA) + data ( The mechanism of Data) is shown in Figure 1.
  • SA Scheduling Assignment
  • the SA is used to indicate the status information of the data sent from the sender.
  • the SA carries the Sidelink Control Information (SCI), and the SCI includes the time-frequency resource information of the data, the modulation and coding strategy. Modulation and coding scheme, MCS), etc.
  • SCI Sidelink Control Information
  • MCS Modulation and coding scheme
  • the communication mode of the D2D system is further divided into two working modes, mode 1 is (a) in FIG. 1, and mode 2 is (b) in FIG.
  • mode 1 the base station allocates the determined time-frequency resource in the resource pool for each D2D terminal for the D2D transmission of the terminal; in mode 2, the terminal autonomously randomly selects the SA resource in the SA resource pool, in the data resource pool. Data resources are randomly selected for D2D transmission.
  • the receiving terminal blindly detects the SA in the resource pool of the SA, and then detects the data by using the time-frequency resource information indicated in the SA to the corresponding resource in the data resource pool.
  • the other terminal When a certain terminal transmits data to another terminal in subframe n through D2D communication, the other terminal needs to send a feedback message in subframe n+k if the other terminal has no data in subframe n+k Sending, the feedback message is separately sent in the feedback channel resource. If the other terminal has data transmission in the subframe n+k, the feedback information is sent in the feedback channel resource of the same subframe, and is sent in the data channel resource. The scene of the data. The other terminal sends feedback information and data information on different frequency domain resources of the same subframe, which improves the system's Peak to Average Power Ratio (PAPR), thereby reducing the effective transmit power of the system and shortening the transmission distance. .
  • PAPR Peak to Average Power Ratio
  • the embodiment of the invention provides a feedback information transmission method, which can reduce the PAPR of the system by carrying the feedback information in the SCI or carrying the data packet of the second data.
  • the embodiment of the present invention provides a method for transmitting feedback information, including: receiving, by a first terminal, first data sent by a second terminal, where the first terminal sends, in a first subframe, a first data to a second terminal.
  • the feedback information wherein the first terminal has the second data to be sent in the first subframe.
  • the feedback information may be carried in the side frame control information SCI of the second data; or the feedback information may be carried in a data packet carrying the second data.
  • the first terminal when the first terminal receives the first data sent by the second terminal, the first terminal may receive the first data sent by the second terminal in the second subframe, where the first subframe and the second subframe are If the identifier of the second subframe is n, the identifier of the first subframe is n+k, where n is an integer greater than or equal to 0, and k is greater than or equal to The natural number of 1.
  • the preset number may be configured or pre-configured by the base station.
  • the data packet if the feedback information is carried in the data packet carrying the second data, the data packet also carries the identifier information of the first terminal and/or the identifier information of the second terminal.
  • the quantity indication information of the feedback information is carried in the side frame control information SCI of the second data, where the quantity The indication information is used to indicate the number of the feedback information carried in the data packet.
  • the embodiment of the present invention provides a feedback information transmission method, including: a first terminal sends data to at least two second terminals, and the first terminal receives each second of the at least two second terminals.
  • the feedback information sent by the terminal for the data wherein the time-frequency resources occupied by the feedback information for the data sent by each of the second terminals are different.
  • the identifier of the time-frequency resource occupied by the feedback information sent by the second terminal for the data is determined by the identifier information of the first terminal and/or the identifier information of the second terminal. .
  • the time-frequency resource occupied by the feedback information sent by the second terminal for the data is indicated by the first terminal.
  • the time-frequency resource occupied by the feedback information of the data sent by the second terminal is a time-frequency resource corresponding to the second terminal in the feedback resource set, where the feedback resource set includes at least two time-frequency resources.
  • the resource, one of the second terminals corresponds to a time-frequency resource.
  • the embodiment of the present invention provides a feedback information transmission method, including: a first terminal sends target data to a second terminal; and the first terminal detects, on a preset feedback channel resource, whether the second terminal sends Feedback information.
  • the first terminal If the first terminal does not detect the feedback information sent by the second terminal, the first terminal retransmits the target data.
  • the preset feedback channel resource is determined by the identifier information of the first terminal and/or the identifier information of the second terminal; or the preset feedback channel resource includes the first sub a time-frequency resource between the frame and the second subframe, wherein the first subframe is a predicted start position of the feedback information, and the second subframe is a predicted end position of the feedback information.
  • the embodiment of the present invention provides a method for transmitting a feedback information, including: receiving, by a first terminal, first data sent by a second terminal, where the first terminal is on a feedback channel resource of the first subframe to a second terminal Sending feedback information for the first data, where the first terminal does not send the second data in the first subframe, and the second data is the data to be sent by the first terminal in the first subframe.
  • an embodiment of the present invention provides a feedback information transmission apparatus, which is applied to a first terminal, where the feedback information transmission apparatus includes a receiving unit and a sending unit, and the receiving unit is configured to receive first data sent by the second terminal. And a sending unit, configured to send, in the first subframe, feedback information for the first data to the second terminal, where the first terminal has second data to be sent in the first subframe.
  • the feedback information is carried in an SCI of the second data.
  • the feedback information is carried in a data packet carrying the second data.
  • an embodiment of the present invention provides a feedback information transmission apparatus, which is applied to a first terminal, where the feedback information transmission apparatus includes a sending unit and a receiving unit, and the sending unit is configured to send data to at least two second terminals.
  • a receiving unit configured to receive feedback information about the data sent by each of the at least two second terminals, where each of the second terminals sends feedback information for the data Time-frequency resources are different.
  • the embodiment of the present invention provides a feedback information transmission apparatus, which is applied to a first terminal, where the feedback information transmission apparatus includes a sending unit, a detecting unit, and a retransmission unit, and the sending unit is configured to send a target to the second terminal. And a detecting unit, configured to detect, on a preset feedback channel resource, whether there is feedback information sent by the second terminal, and a retransmission unit, configured to: if the feedback information sent by the second terminal is not detected, the retransmission device Target data.
  • the embodiment of the present invention provides a feedback information transmission apparatus, which is applied to a first terminal, where the feedback information transmission apparatus includes a receiving unit and a sending unit, and the receiving unit is configured to receive the first data sent by the second terminal.
  • a sending unit configured to send feedback information for the first data to the second terminal on the feedback channel resource of the first subframe, where the first terminal does not send the second data in the first subframe, and the second data is the first The data to be transmitted by the terminal in the first subframe.
  • the first terminal receives the first data sent by the second terminal, and the first terminal sends the feedback information for the first data to the second terminal in the first subframe, where the first terminal is in the first
  • the second data to be sent exists in one subframe, and the feedback information may be carried in the SCI of the second data, or the feedback information may be carried in the data packet carrying the second data.
  • the feedback information can be carried in the SCI or in the data packet carrying the second data without using additional frequency domain resources to transmit feedback information, which can reduce the PAPR of the system.
  • FIG. 2 is a schematic diagram of D2D communication according to an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of a D2D resource pool according to an embodiment of the present invention.
  • FIG. 5 is an interaction flowchart of another feedback information transmission method according to an embodiment of the present invention.
  • FIG. 6 is a schematic diagram of a D2D communication scenario according to an embodiment of the present invention.
  • FIG. 7 is an interaction flowchart of still another feedback information transmission method according to an embodiment of the present invention.
  • FIG. 8 is a schematic diagram of a time-frequency resource according to an embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of a feedback information transmission apparatus according to an embodiment of the present invention.
  • 9b is a schematic structural diagram of a feedback information transmission apparatus according to an embodiment of the present invention.
  • FIG. 10 is a schematic structural diagram of a feedback information transmission apparatus according to an embodiment of the present invention.
  • FIG. 10b is a schematic structural diagram of a feedback information transmission apparatus according to an embodiment of the present invention.
  • FIG. 11 is a schematic structural diagram of a feedback information transmission apparatus according to an embodiment of the present invention.
  • FIG. 11b is a schematic structural diagram of a feedback information transmission apparatus according to an embodiment of the present invention.
  • FIG. 2 is a schematic structural diagram of a D2D communication system according to an embodiment of the present invention.
  • the D2D communication system includes a base station and a terminal, where the base station is configured to allocate time-frequency resources to the terminal, and the terminal utilizes time-frequency resources allocated by the base station.
  • D2D is a kind of end-to-end direct communication technology. The biggest difference from the traditional cellular communication technology is that the communication between the terminal and the terminal does not need to be transferred directly by the base station, and the base station can perform resource configuration and scheduling. , coordination, etc., to directly communicate between the auxiliary terminals.
  • the D2D technology is discussed in 3GPP.
  • the D2D technology in LTE Rel.12 is a form of broadcast for data transmission, and includes two characteristics: discovery and communication.
  • Discovery is the periodic broadcast information of the terminal, so that users around him can detect the information and discover the user;
  • Communication is the direct transmission of data between the two terminals, using scheduling allocation (SA) + data (Data)
  • SA scheduling allocation
  • Data data
  • the scheduling allocation information is used to indicate the status information of the data sent from the D2D terminal.
  • the SA carries the sidelink control information (SCI: Sidelink control information), and the SCI includes the time-frequency resource information of the data. Modulation and Coding Scheme (MCS) information, etc.
  • SCI Sidelink control information
  • MCS Modulation and Coding Scheme
  • Data Data, the D2D terminal sends the time-frequency resource location indicated by the SCI, and sends the service data in the format indicated by the SCI.
  • the D2D terminal is allocated a transmission resource pool by using a base station configuration or a pre-configuration manner, and is used for data transmission by the D2D terminal.
  • the resource pool is a set of transmission resources, and is time-frequency resource information for D2D transmission configured or pre-configured by the base station.
  • the base station can be configured with different resource pools, such as the discovery resource pool, the SA resource pool, and the data resource pool.
  • the transmission resources used by Data are indicated by the SCI in the SA.
  • the terminal transmits or listens to signals in the corresponding resource pool according to the resource pool information broadcasted by the base station or the pre-configured resource pool information, so as to implement D2D transmission.
  • the D2D system is divided into two modes of operation: discovery and communication.
  • the communication part is divided into two working modes.
  • Mode 1 is (a) of FIG. 1 and mode 2 is (b) of FIG. 1 .
  • the base station allocates the determined time-frequency resource in the resource pool for each D2D terminal for the D2D terminal to perform D2D transmission;
  • mode 2 the D2D terminal autonomously randomly selects the SA resource in the SA resource pool, in the data
  • Data resources are randomly selected from the resource pool for D2D transmission.
  • the receiving D2D terminal blindly detects the SA in the resource pool of the SA, and then detects the data on the corresponding time-frequency resource by using the data time-frequency resource information indicated by the SCI in the SA.
  • the feedback information transmission method in the embodiment of the present invention can be applied to a D2D communication system.
  • the first terminal and the second terminal in the embodiment of the present invention are both D2D terminals.
  • the feedback information of the embodiment of the present invention can be applied to a vehicle networking system, such as a vehicle lining up, several vehicles forming a fleet, and the first vehicle as a team leader to achieve control of the entire fleet.
  • a vehicle networking system such as a vehicle lining up, several vehicles forming a fleet
  • the first vehicle as a team leader to achieve control of the entire fleet.
  • the receiving end needs to send feedback information. It is also possible for the team's first vehicle to send messages to other vehicles in the fleet by broadcast or multicast, and each vehicle sends feedback to the team's first vehicle.
  • the vehicle A transmits a feedback message in the subframe n+k, and if the vehicle A has no data transmission in the subframe n+k, then The feedback message is sent separately in the feedback resource of the subframe n+k. If the vehicle A has data transmission in the subframe n+k at the same time, the feedback message is sent in the feedback resource of the same subframe, and is sent in the data resource. The scene of the data message.
  • the peak-to-average power ratio (PAPR) of the system is increased, thereby reducing the effective transmission power of the system and shortening the transmission distance.
  • PAPR peak-to-average power ratio
  • the feedback information transmission method provided by the first aspect of the embodiments of the present invention is mainly used to solve how to perform multiplex transmission when the feedback information and the data information are transmitted in the same subframe, and reduce the PAPR of the system.
  • FIG. 4 is a flowchart of a method for transmitting feedback information according to an embodiment of the present invention. As shown in the figure, the feedback information transmission method includes but is not limited to the following steps:
  • Step S10 The second terminal sends the first data to the first terminal.
  • the first terminal and the second terminal may include but are not limited to a vehicle, a handheld device, etc.
  • the first terminal and the second terminal may communicate with the base station or the first terminal and the second terminal may be connected to other terminals. Direct communication.
  • the first terminal and the second terminal can also communicate directly.
  • the second terminal sends the first data to the first terminal, for example, may be a unicast communication or a broadcast communication, and the second terminal may send the first data, such as the subframe n, to the first terminal in the second subframe.
  • FIG. 8 it is a schematic diagram of a time-frequency resource provided by an embodiment of the present invention.
  • the abscissa is the time domain and the ordinate is the frequency domain.
  • the second terminal sends the first data in the second subframe.
  • the SA frequency domain resource in the second subframe carries the SA of the second terminal
  • the data frequency domain resource of the second subframe carries the first data of the second terminal.
  • Step S11 The first terminal receives the first data sent by the second terminal.
  • Step S12 The first terminal sends feedback information for the first data to the second terminal in a first subframe, where the first terminal has a second to be sent in the first subframe. data;
  • the feedback information is carried in the side frame control information SCI of the second data.
  • the feedback information is carried in a data packet carrying the second data.
  • the first terminal after receiving the first data sent by the second terminal, the first terminal needs to send feedback information for the first data to the second terminal.
  • the feedback information may be an acknowledgement (ACK) or Negative Acknowledgement (NACK).
  • the first terminal sends the feedback information for the first data to the second terminal in the first subframe, where the first subframe and the second subframe are different from each other by a preset number of subframes, and the preset number may be Base station configuration or pre-configured. For example, if the first terminal receives the first data sent by the second terminal in the subframe n, the first terminal needs to send the feedback information to the second terminal in the subframe n+k, where k is a natural number greater than or equal to 1.
  • the first terminal needs to send feedback information for the first data to the second terminal in the first subframe. Specifically, the first terminal selects the frequency domain resource in the feedback resource pool of the first subframe. Sending feedback information to the second terminal. At the same time, the first terminal has the second data to be sent in the first subframe. As shown in FIG. 8, the first terminal has the second data to be transmitted in the data frequency domain resource of the first subframe, and the SA of the first subframe has the SA of the second data to be sent, in the SA.
  • the SCI is carried, and the SCI is used to indicate a time-frequency resource of the second data, a transmission format, and the like.
  • the multiplexing manner proposed by the embodiment of the present invention is as follows:
  • the feedback information is carried in the side frame control information SCI of the second data.
  • the feedback information is carried in a data packet carrying the second data.
  • the above two alternative multiplexing methods can avoid high PAPR problems caused by additional resources for transmitting feedback information.
  • the first terminal carries the feedback information in the SCI, and further carries the identifier information of the second terminal, such as the ID information, in the SCI.
  • the purpose of carrying the ID information of the second terminal is to distinguish which originating end of the feedback information is when the two subframes of the subframe n send data to the first terminal at the same time.
  • the first terminal carries the identifier information of the first terminal, such as the ID information of the first terminal, in the SCI.
  • the purpose of carrying the ID information of the first terminal is that when the second terminal sends data to the plurality of terminals in the subframe n, the first terminal carries the ID information in the SCI to distinguish the feedback information and which terminal the data information is sent by. .
  • the data packet further carries identifier information of the first terminal and/or identifier information of the second terminal.
  • the feedback information may be carried in the data packet of the second data.
  • the data packet also carries the identifier information of the first terminal and/or the identifier information of the second terminal.
  • the first terminal needs to send feedback information for each second terminal, and the feedback information of the multiple second terminals is encapsulated in the data packet of the second data.
  • the number of feedback information that needs to be sent is m.
  • the ID information of the corresponding second terminal needs to be carried, and the second terminal determines which data is correctly received and which is not correctly received. .
  • the feedback information is carried in a data packet carrying the second data
  • the quantity indication information of the feedback information is carried in the SCI of the second data, where the quantity indication information is used to indicate the quantity of the feedback information carried in the data packet.
  • the first terminal needs to send feedback information for each second terminal, where the first terminal carries the indication quantity information (N bits) in the SCI, where The quantity indication information is used to indicate how many pieces of feedback information is included in the data packet of the second data, that is, how many ACK/NACK information is included.
  • a second terminal sends the first data to the first terminal, and the first terminal needs to send the feedback information for the first data to the second terminal.
  • the first terminal receives the first data sent by the second terminal in the subframe n, and the first terminal sends the feedback information in the subframe n+k.
  • the second data needs to be sent.
  • the feedback information has a higher transmission priority, a feasible manner is that the first terminal only sends feedback information on the feedback frequency domain resource of the first subframe, and does not send the second data.
  • the first terminal receives the first data sent by the second terminal, and the first terminal sends the feedback information for the first data to the second terminal in the first subframe, where the first terminal is in the first
  • the second data to be sent exists in one subframe, and the feedback information may be carried in the side frame control information SCI of the second data, or the feedback information may be carried in the data packet carrying the second data.
  • the feedback information can be carried in the SCI or in the data packet carrying the second data without using additional frequency domain resources to transmit feedback information, which can reduce the PAPR of the system.
  • the method for transmitting feedback information includes but is not limited to the following steps:
  • the first terminal sends data to at least two second terminals.
  • the first terminal broadcasts or multicasts data to at least two second terminals, and the at least two second terminals are different in distance from the first terminal, when each second terminal is in the same time-frequency resource.
  • the near-far effect problem occurs, that is, the feedback information power of the second terminal far from the first terminal is much smaller than the second terminal that is closer to the first terminal, so the feedback information thereof It is submerged and it is difficult to detect it correctly.
  • An optional application scenario is the transmission of feedback information in the vehicle networking system.
  • the team leader uses broadcast or multicast to transmit data to the vehicles in the fleet, all vehicles in the fleet need to be sent to the team.
  • the first vehicle sends feedback information. If the feedback resource of the feedback information is in one-to-one correspondence with the transmission resource of the transmission data, multiple vehicles may use the same feedback resource for feedback, thereby causing transmission conflict of the feedback information and reducing performance.
  • orthogonalization transmission is performed by means of code division. Since the distance between the vehicles in the fleet and the vehicle at the head of the team is different, the power of the feedback sent by different vehicles to the first vehicle of the team is different, which will lead to the near-far effect problem. That is, the feedback information power of the vehicle far from the first vehicle of the team is much smaller than that of the vehicle close to the first vehicle of the team, so the feedback information will be submerged and it is difficult to detect it correctly.
  • the embodiment of the present invention provides an improvement to the foregoing problem, where the first terminal sends data to at least two second terminals, and the sending manner may be broadcast sending or multicast sending.
  • the second terminal sends feedback information about the data to the first terminal.
  • each second terminal after receiving the data sent by the first terminal, each second terminal needs to send feedback information for the received data to the first terminal. In order to avoid the near-far effect problem, each second terminal sends the feedback information.
  • the time-frequency resources are different. Specifically, when the second terminal determines the time-frequency resources for the feedback information of the received data, the following optional implementation manners may be selected:
  • the identifier of the time-frequency resource occupied by the feedback information of the data sent by the second terminal is determined by the identifier information of the first terminal and/or the identifier information of the second terminal;
  • the time-frequency resource occupied by the feedback information sent by the second terminal for the data is indicated by the first terminal;
  • the time-frequency resource occupied by the feedback information of the data sent by the second terminal is a time-frequency resource corresponding to the second terminal in the feedback resource set, and the feedback resource set includes at least two time-frequency resources.
  • One of the second terminals corresponds to one time-frequency resource.
  • the first terminal receives feedback information about the data sent by each second terminal of the at least two second terminals, where the feedback information for the data is sent by each of the second terminals.
  • the time-frequency resources occupied are different.
  • the first terminal receives feedback information about the received data sent by each of the at least two second terminals, and the time-frequency resources occupied by the feedback information sent by each second terminal are different. Therefore, the far and near effect problem can be avoided.
  • the multiple terminals use different time-frequency resources to send feedback information for the data to the first terminal, thereby avoiding multiple
  • the second terminal uses the same time-frequency resource to perform the near-far effect problem caused by the feedback.
  • FIG. 7 is a flowchart of a method for transmitting feedback information according to an embodiment of the present invention. As shown in the figure, the method for transmitting feedback information includes but is not limited to the following steps:
  • the first terminal sends target data to the second terminal.
  • unicast transmission after the introduction of unicast transmission, there are two modes of transmission in the system: unicast transmission and broadcast transmission.
  • the mode of unicast transmission requires feedback from the receiving end, and the manner of broadcast transmission does not require feedback from the receiving end.
  • the receiving end detects the data and the detection fails, the receiving end has difficulty in identifying whether the data is unicast or broadcast, and therefore the terminal cannot know whether the feedback information needs to be sent, because the broadcast transmission generally does not require feedback.
  • Feedback is required for unicast transmission. For the sender of the unicast transmission, the feedback information of the receiver cannot be received.
  • the embodiment of the present invention is improved on the basis of the above, and is mainly for the scenario of unicast transmission, because if the first terminal broadcasts the target data, no feedback is needed regardless of whether the second terminal correctly receives the target data.
  • the first terminal sends the target data to the second terminal by using a unicast transmission manner.
  • the first terminal detects, on a preset feedback channel resource, whether feedback information sent by the second terminal exists.
  • the preset feedback channel resource is determined by the identifier information of the first terminal and/or the identifier information of the second terminal; or
  • the preset feedback channel resource includes a time-frequency resource between the first subframe and the second subframe, where the first subframe is a predicted start position of the feedback information, and the second subframe is the feedback The predicted end position of the information.
  • the second terminal after the second terminal receives the target data sent by the first terminal, if the second terminal detects an error, it cannot identify whether the target data is transmitted through a unicast transmission manner or a broadcast transmission manner, and thus the second terminal Do not send feedback.
  • the first terminal Because the first terminal sends the target data by using the unicast transmission mode, the first terminal detects whether there is feedback information sent by the second terminal on the preset feedback channel resource.
  • the preset feedback channel resource may be determined by a UE ID of the first terminal and/or a UE ID of the second terminal.
  • the first terminal searches for feedback information on the subframe [n+m, n+m+k], where n represents the time at which the first terminal unicasts the transmission target data, and n+m represents the first possible occurrence of the feedback information.
  • the subframe position, n+m+k, represents the last subframe position at which feedback information may appear.
  • the first terminal If the first terminal does not detect the feedback information sent by the second terminal, the first terminal retransmits the target data.
  • the first terminal if the first terminal does not detect the feedback information sent by the second terminal, the first terminal retransmits the target data.
  • the receiving end ie, the second terminal
  • the feedback information cannot be transmitted
  • the sending end ie, the first terminal
  • the first terminal unicasts the target data to the second terminal. If the second terminal fails to detect the data, the second terminal cannot know whether the data is a unicast transmission or a broadcast transmission, and therefore the second terminal cannot determine the second terminal. Whether the feedback information needs to be sent, in the embodiment of the present invention, if the second terminal does not send the feedback information, the first terminal detects whether there is feedback information sent by the second terminal on the preset feedback channel resource, if no detection is performed. When the feedback information is sent, the data is automatically retransmitted to improve the reliability of data transmission.
  • FIG. 9 is a schematic structural diagram of a feedback information transmission apparatus according to an embodiment of the present invention.
  • the feedback information transmission apparatus of the embodiment of the present invention may be applied to the first terminal of the embodiment of FIG. 4, where the first terminal may be any D2D. terminal.
  • the apparatus may include: a receiving unit 101 and a transmitting unit 102, wherein:
  • the receiving unit 101 is configured to perform the receiving action performed by the first terminal described in the method in FIG. 4 above;
  • the sending unit 102 is configured to perform a sending action performed by the first terminal described in the foregoing method in FIG. 4;
  • the receiving unit 101 and the transmitting unit 102 can be implemented by using the transceiver 1001 in FIG. 9b.
  • the receiving unit 101 is configured to receive first data sent by the second terminal.
  • the sending unit 102 is configured to send, in the first subframe, feedback information for the first data to the second terminal, where the first terminal has second data to be sent in the first subframe;
  • the feedback information is carried in an SCI of the second data.
  • the feedback information is carried in a data packet carrying the second data.
  • the receiving unit is configured to receive the first data sent by the second terminal in the second subframe, where the first subframe and the second subframe are different from each other by a preset number of subframes.
  • the preset number is configured or pre-configured by the base station.
  • the data packet further carries identifier information of the first terminal and/or identifier information of the second terminal.
  • the feedback information is carried in a data packet carrying the second data
  • the quantity indication information of the feedback information is carried in the SCI of the second data, where the quantity indication information is used to indicate the quantity of the feedback information carried in the data packet.
  • the apparatus may include: a transceiver 1001 and a processor 1002.
  • the processor 1002 is configured to control the operation of the apparatus, including performing time-frequency resource mapping (including receiving and/or transmitting) of the feedback information through the transceiver 1001.
  • a memory 1003 may be included.
  • the memory 1003 may include a read only memory and a random access memory for providing instructions and data to the processor 1002.
  • the memory 1003 can be integrated into the processor 1002 or can be independent of the processor 1002.
  • a portion of the memory 1003 may also include non-volatile line random access memory (NVRAM).
  • NVRAM non-volatile line random access memory
  • bus system 1009 includes a power bus, a control bus, and a status signal bus in addition to the data bus.
  • bus system 1009 includes a power bus, a control bus, and a status signal bus in addition to the data bus.
  • bus system 1009 various buses are labeled as bus system 1009 in the figure.
  • the flow disclosed by the first terminal side of FIG. 4 of the embodiment of the present application can be applied to the transceiver 1001 and the processor 1002.
  • each step of the process implemented by the device may be completed by an integrated logic circuit of hardware in the processor 1002 or an instruction in the form of software.
  • the processor 1002 can be a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or a transistor logic device, and a discrete hardware component, which can be implemented or executed in the embodiment of the present application.
  • a general purpose processor can be a microprocessor or any conventional processor or the like.
  • the steps of the method disclosed in the embodiments of the present application may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor.
  • the software modules can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in the memory 1003, and the processor 1002 reads the information in the memory 1003, and completes the steps of the instruction flow of the embodiment of the present invention in combination with the hardware thereof.
  • the transceiver 1001 is configured to receive first data sent by the second terminal.
  • the transceiver 1001 is further configured to send, in the first subframe, feedback information for the first data to the second terminal, where the first terminal has second data to be sent in the first subframe;
  • the feedback information is carried in an SCI of the second data.
  • the feedback information is carried in a data packet carrying the second data.
  • the transceiver 1001 is further configured to receive the first data sent by the second terminal in the second subframe, where the first subframe and the second subframe are different from each other by a preset number of subframes.
  • the preset number is configured or pre-configured by the base station.
  • the data packet further carries identifier information of the first terminal and/or identifier information of the second terminal.
  • the feedback information is carried in a data packet carrying the second data
  • the SCI of the second data carries the quantity indication information of the feedback information, where the quantity indication information is used to indicate the quantity of the feedback information carried in the data packet.
  • the device When the device is a user equipment, it may further include an input device such as a keyboard, an output device, such as a display screen.
  • an input device such as a keyboard
  • an output device such as a display screen.
  • FIG. 10a and FIG. 10b are schematic diagrams showing the structure of a feedback information transmission apparatus according to an embodiment of the present invention.
  • the feedback information transmission apparatus of the embodiment of the present invention may be applied to the first terminal of the embodiment of FIG. 5, and the first terminal may be any D2D.
  • the terminal, the first terminal broadcasts data to at least two second terminals, and the second terminal may also be a D2D terminal.
  • the apparatus may include: a transmitting unit 201 and a receiving unit 202, wherein:
  • the sending unit 201 is configured to perform a sending action performed by the first terminal described in the foregoing method in FIG. 5;
  • the receiving unit 202 is configured to perform a sending action performed by the first terminal described in the foregoing method in FIG. 5;
  • the sending unit 201 and the receiving unit 202 can be implemented by using the transceiver 2001 in FIG. 10b.
  • the sending unit 201 is configured to send data to the at least two second terminals
  • the receiving unit 202 is configured to receive feedback information about the data sent by each of the at least two second terminals, where the feedback information sent by the second terminal for the data is occupied.
  • the time-frequency resources are different.
  • the identifier of the time-frequency resource occupied by the feedback information of the data sent by the second terminal is determined by the identifier information of the first terminal and/or the identifier information of the second terminal;
  • the time-frequency resource occupied by the feedback information sent by the second terminal for the data is indicated by the first terminal;
  • the time-frequency resource occupied by the feedback information of the data sent by the second terminal is a time-frequency resource corresponding to the second terminal in the feedback resource set, and the feedback resource set includes at least two time-frequency resources.
  • One of the second terminals corresponds to one time-frequency resource.
  • the apparatus may include: a transceiver 2001 and a processor 2002.
  • the processor 2002 is configured to control the operation of the apparatus, including transmitting data to the second terminal through the transceiver 2001, and receiving feedback information for the data sent by the second terminal.
  • a memory 2003 may be included, and the memory 2003 may include a read only memory and a random access memory for providing instructions and data to the processor 2002.
  • the memory 2003 can be integrated into the processor 2002 or it can be independent of the processor 2002.
  • a portion of the memory 2003 may also include non-volatile line random access memory (NVRAM).
  • NVRAM non-volatile line random access memory
  • bus system 2009 includes, in addition to the data bus, a power bus, a control bus, and a status signal bus.
  • bus system 2009 includes, in addition to the data bus, a power bus, a control bus, and a status signal bus.
  • various buses are labeled as the bus system 2009 in the figure.
  • the flow disclosed by the first terminal side of FIG. 5 of the embodiment of the present application can be applied to the transceiver 2001 and the processor 2002.
  • each step of the process implemented by the device may be completed by an integrated logic circuit of hardware in the processor 2002 or an instruction in the form of software.
  • the processor 2002 can be a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or a transistor logic device, and a discrete hardware component, which can be implemented or executed in the embodiment of the present application.
  • a general purpose processor can be a microprocessor or any conventional processor or the like.
  • the steps of the method disclosed in the embodiments of the present application may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor.
  • the software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in the memory 2003, and the processor 2002 reads the information in the memory 2003, and completes the steps of the instruction flow of the embodiment of the present invention in combination with the hardware thereof.
  • the transceiver 2001 is configured to send data to the at least two second terminals;
  • the transceiver 1001 is further configured to receive feedback information about the data sent by each of the at least two second terminals, where the feedback information sent by each of the second terminals for the data is occupied.
  • the time-frequency resources are different.
  • the identifier of the time-frequency resource occupied by the feedback information of the data sent by the second terminal is determined by the identifier information of the first terminal and/or the identifier information of the second terminal;
  • the time-frequency resource occupied by the feedback information sent by the second terminal for the data is indicated by the first terminal;
  • the time-frequency resource occupied by the feedback information of the data sent by the second terminal is a time-frequency resource corresponding to the second terminal in the feedback resource set, and the feedback resource set includes at least two time-frequency resources.
  • One of the second terminals corresponds to one time-frequency resource.
  • the device When the device is a user equipment, it may further include an input device such as a keyboard, an output device, such as a display screen.
  • an input device such as a keyboard
  • an output device such as a display screen.
  • FIG. 11 is a schematic structural diagram of a feedback information transmission apparatus according to an embodiment of the present invention.
  • the feedback information transmission apparatus according to the embodiment of the present invention may be applied to the first terminal in the embodiment of FIG. 7.
  • the first terminal may be any D2D.
  • the terminal sends data to the second terminal, and the second terminal may also be a D2D terminal.
  • the apparatus may include: a sending unit 301, a detecting unit 302, and a retransmission unit 303, where:
  • the sending unit 301 is configured to perform a sending action performed by the first terminal described in the foregoing method in FIG. 7;
  • the detecting unit 302 is configured to perform the detecting action performed by the first terminal described in the method of FIG. 7 above;
  • the retransmission unit 303 is configured to perform the retransmission action performed by the first terminal described in the foregoing method in FIG.
  • the sending unit 301 and the retransmission unit 303 can be implemented by using the transceiver 3001 in FIG. 11b.
  • Detection unit 302 can be implemented using transceiver 3002 in Figure 11b.
  • the sending unit 301 is configured to send target data to the second terminal.
  • the detecting unit 302 is configured to detect, on the preset feedback channel resource, whether there is feedback information sent by the second terminal;
  • the retransmission unit 303 is configured to retransmit the target data if the feedback information sent by the second terminal is not detected.
  • the preset feedback channel resource is determined by the identifier information of the first terminal and/or the identifier information of the second terminal; or
  • the preset feedback channel resource includes a time-frequency resource between the first subframe and the second subframe, where the first subframe is a predicted start position of the feedback information, and the second subframe is the feedback The predicted end position of the information.
  • the apparatus may include: a transceiver 3001 and a processor 3002.
  • the processor 3002 is configured to control the operation of the apparatus, including transmitting the target data to the second terminal through the transceiver 3001, and retransmitting the target data.
  • a memory 3003 may be included.
  • the memory 3003 may include a read only memory and a random access memory for providing instructions and data to the processor 3002.
  • the memory 3003 may be integrated in the processor 3002 or may be independent of the processor 3002.
  • a portion of the memory 3003 may also include non-volatile line random access memory (NVRAM).
  • NVRAM non-volatile line random access memory
  • bus system 3009 includes a power bus, a control bus, and a status signal bus in addition to the data bus.
  • bus system 3009 includes a power bus, a control bus, and a status signal bus in addition to the data bus.
  • various buses are labeled as bus system 3009 in the figure.
  • the flow disclosed by the first terminal side of FIG. 7 of the embodiment of the present application can be applied to the transceiver 3001 and the processor 3002.
  • each step of the process implemented by the device may be completed by an integrated logic circuit of hardware in the processor 3002 or an instruction in the form of software.
  • the processor 3002 can be a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or a transistor logic device, and a discrete hardware component, which can be implemented or executed in the embodiment of the present application.
  • a general purpose processor can be a microprocessor or any conventional processor or the like.
  • the steps of the method disclosed in the embodiments of the present application may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor.
  • the software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in the memory 3003, and the processor 3002 reads the information in the memory 3003, and completes the steps of the instruction flow of the embodiment of the present invention in combination with the hardware thereof.
  • the transceiver 3001 is configured to send target data to the second terminal.
  • the processor 3002 is configured to detect, on a preset feedback channel resource, whether feedback information sent by the second terminal exists.
  • the transceiver 1001 is further configured to retransmit the target data if the feedback information sent by the second terminal is not detected.
  • the preset feedback channel resource is determined by the identifier information of the first terminal and/or the identifier information of the second terminal; or
  • the preset feedback channel resource includes a time-frequency resource between the first subframe and the second subframe, where the first subframe is a predicted start position of the feedback information, and the second subframe is the feedback The predicted end position of the information.
  • the device When the device is a user equipment, it may further include an input device such as a keyboard, an output device, such as a display screen.
  • an input device such as a keyboard
  • an output device such as a display screen.
  • the program can be stored in a computer readable storage medium, when the program is executed
  • the flow of the method embodiments as described above may be included.
  • the foregoing storage medium includes various media that can store program codes, such as a ROM or a random access memory RAM, a magnetic disk, or an optical disk.

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Abstract

本发明实施例公开了一种反馈信息传输方法及装置，其中，反馈信息传输方法包括：第一终端接收第二终端发送的第一数据，该第一终端在第一子帧向第二终端发送针对第一数据的反馈信息，其中，第一终端在第一子帧存在待发送的第二数据。上述反馈信息可以承载在所述第二数据的侧行链路控制信息SCI中；或者，上述反馈信息可以承载在携带所述第二数据的数据包中。采用本发明实施例，将反馈信息承载在SCI中或者携带第二数据的数据包中，可以降低***的PAPR。

Description

反馈信息传输方法及装置
本申请要求于2017年1月17日提交中国专利局、申请号为201710041111.0、申请名称为“一种反馈信息传输方法及装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及通信技术领域，尤其涉及一种反馈信息传输方法及装置。
背景技术
终端到终端(Device to Device，D2D)通信是一种支持移动设备和移动设备之间使用专用空中接口技术直接数据通信的技术。与传统的蜂窝通信技术最大的不同在于，终端与终端之间的通信不再需要基站的中转直接就可以进行通信，基站可以进行资源的配置、调度、协调等，从而辅助终端之间直接进行通信。
在3GPP中对D2D技术进行了讨论，长期演进(Long Term Evolution,LTE)的Rel.12中，D2D技术是采用广播的形式进行数据的传输，包含两个特性：发现(discovery)和通信(communication)。Discovery是终端周期性的广播信息，从而使得在他周围的终端可以检测到该信息并且发现该用户；Communication是两个终端之间数据的直接传输，采用调度分配(Scheduling Assignment，SA)+数据(Data)的机制，如图1所示。
SA，是用来指示从发送端发出的数据的状态信息，SA中承载的是侧行链路控制信息(Sidelink control information，SCI),SCI中包括数据的时频资源信息、调制与编码策略(modulation and coding scheme，MCS)等。接收端能够根据SCI的指示进行数据的接收。
D2D***的通信(communication)方式又分为两种工作模式，模式1为图1中的(a)，模式2为图1中的(b)。在模式1中，基站为每个D2D终端在资源池内分配确定的时频资源用于该终端进行D2D的传输；在模式2中，终端自主的在SA资源池内随机选取SA资源，在数据资源池中随机选取数据资源进行D2D传输。接收终端在SA的资源池内盲检测SA，然后通过SA中指示的时频资源信息到数据资源池中相应的资源上检测数据。
当某一个终端通过D2D通信方式在子帧n向另一个终端发送数据时，该另一个终端需要在子帧n+k中发送反馈消息，如果该另一个终端在子帧n+k中没有数据发送，则在反馈信道资源中单独发送反馈消息，如果该另一个终端在子帧n+k中同时有数据发送，会存在同一子帧的反馈信道资源中发送反馈信息，在数据信道资源中发送数据的场景。该另一个终端在同一子帧的不同频域资源上发送反馈信息和数据信息，会提高***的峰均功率比(Peak to Average Power Ratio，PAPR)，从而降低***的有效发送功率，缩短传输距离。
发明内容
本发明实施例提供一种反馈信息传输方法，将反馈信息承载在SCI中或者携带第二数据的数据包中，可以降低***的PAPR。
第一方面，本发明实施例提供了一种反馈信息传输方法，包括：第一终端接收第二终端发送的第一数据，该第一终端在第一子帧向第二终端发送针对第一数据的反馈信息，其 中，第一终端在第一子帧存在待发送的第二数据。
上述反馈信息可以承载在所述第二数据的侧行链路控制信息SCI中；或者，上述反馈信息可以承载在携带所述第二数据的数据包中。
在一种可能的设计中，第一终端接收第二终端发送的第一数据时，可以是在第二子帧接收第二终端发送的第一数据，该第一子帧和第二子帧之间相差预设个数的子帧，比如，第二子帧的标识为n，则该第一子帧的标识为n+k，其中，n为大于或者等于0的整数，k为大于或者等于1的自然数。该预设个数可以是由基站配置或者预配置的。
在一种可能的设计中，若反馈信息承载在携带第二数据的数据包中，该数据包中还承载第一终端的标识信息和/或第二终端的标识信息。
在一种可能的设计中，若反馈信息承载在携带第二数据的数据包中，在所述第二数据的侧行链路控制信息SCI中携带所述反馈信息的数量指示信息，所述数量指示信息用于指示在所述数据包中携带所述反馈信息的数量。
第二方面，本发明实施例提供了一种反馈信息传输方法，包括：第一终端向至少两个第二终端发送数据，该第一终端接收所述至少两个第二终端中每个第二终端发送的针对所述数据的反馈信息，其中，每个所述第二终端发送的针对所述数据的反馈信息占用的时频资源不同。
在一种可能的设计中，所述第二终端发送的针对所述数据的反馈信息占用的时频资源的标识由所述第一终端的标识信息和/或所述第二终端的标识信息确定。或者，所述第二终端发送的针对所述数据的反馈信息占用的时频资源由所述第一终端指示。或者，所述第二终端发送的针对所述数据的反馈信息占用的时频资源为反馈资源集合中与所述第二终端对应的时频资源，所述反馈资源集合中包括至少两个时频资源，一个所述第二终端对应一个时频资源。
第三方面，本发明实施例提供了一种反馈信息传输方法，包括：第一终端向第二终端发送目标数据；该第一终端在预设反馈信道资源上检测是否存在所述第二终端发送的反馈信息。
若所述第一终端未检测到所述第二终端发送的反馈信息，所述第一终端重传所述目标数据。
在一种可能的设计中，所述预设反馈信道资源由所述第一终端的标识信息和/或所述第二终端的标识信息确定；或者，所述预设反馈信道资源包括第一子帧和第二子帧之间的时频资源，所述第一子帧为所述反馈信息的预测开始位置，所述第二子帧为所述反馈信息的预测结束位置。
第四方面，本发明实施例提供了一种反馈信息传输方法，包括：第一终端接收第二终端发送的第一数据，该第一终端在第一子帧的反馈信道资源上向第二终端发送针对第一数据的反馈信息，其中，第一终端不在第一子帧发送第二数据，该第二数据为第一终端在第一子帧中待发送的数据。
第五方面，本发明实施例提供了一种反馈信息传输装置，应用于第一终端，该反馈信息传输装置包括接收单元和发送单元，接收单元，用于接收第二终端发送的第一数据；发送单元，用于在第一子帧向所述第二终端发送针对所述第一数据的反馈信息，其中，所述第一终端在所述第一子帧存在待发送的第二数据。
所述反馈信息承载在所述第二数据的SCI中；或者，
所述反馈信息承载在携带所述第二数据的数据包中。
第六方面，本发明实施例提供了一种反馈信息传输装置，应用于第一终端，该反馈信息传输装置包括发送单元和接收单元，发送单元，用于向至少两个第二终端发送数据；接收单元，用于接收所述至少两个第二终端中每个第二终端发送的针对所述数据的反馈信息，其中，每个所述第二终端发送的针对所述数据的反馈信息占用的时频资源不同。
第七方面，本发明实施例提供了一种反馈信息传输装置，应用于第一终端，该反馈信息传输装置包括发送单元、检测单元和重传单元，发送单元，用于向第二终端发送目标数据；检测单元，用于在预设反馈信道资源上检测是否存在所述第二终端发送的反馈信息；重传单元，用于若未检测到所述第二终端发送的反馈信息，重传所述目标数据。
第八方面，本发明实施例提供了一种反馈信息传输装置，应用于第一终端，该反馈信息传输装置包括接收单元和发送单元，接收单元，用于接收第二终端发送的第一数据，发送单元，用于在第一子帧的反馈信道资源上向第二终端发送针对第一数据的反馈信息，其中，第一终端不在第一子帧发送第二数据，该第二数据为第一终端在第一子帧中待发送的数据。
通过实施本发明实施例，第一终端接收第二终端发送的第一数据，该第一终端在第一子帧向第二终端发送针对第一数据的反馈信息，其中，该第一终端在第一子帧存在待发送的第二数据，反馈信息可以承载在第二数据的SCI中，或者，该反馈信息可以承载在携带第二数据的数据包中。将反馈信息承载在SCI中或者携带第二数据的数据包中，而不使用额外的频域资源传输反馈信息，可以降低***的PAPR。
附图说明
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例中所需要使用的附图作简单地介绍。
图1是现有技术中的一种D2D通信传输机制；
图2是本发明实施例提供的一种D2D通信示意图；
图3是本发明实施例提供的一种D2D资源池示意图；
图4是本发明实施例提供的一种反馈信息传输方法的交互流程图；
图5是本发明实施例提供的另一种反馈信息传输方法的交互流程图；
图6是本发明实施例提供的一种D2D通信场景示意图；
图7是本发明实施例提供的又一种反馈信息传输方法的交互流程图；
图8是本发明实施例提供的一种时频资源示意图；
图9a是本发明实施例提供的一种反馈信息传输装置的结构示意图；
图9b是本发明实施例提供的一种反馈信息传输装置的结构示意图；
图10a是本发明实施例提供的一种反馈信息传输装置的结构示意图；
图10b是本发明实施例提供的一种反馈信息传输装置的结构示意图；
图11a是本发明实施例提供的一种反馈信息传输装置的结构示意图；
图11b是本发明实施例提供的一种反馈信息传输装置的结构示意图。
具体实施方式
下面结合本发明实施例中的附图对本发明实施例进行描述。
请参照图2，图2是本发明实施例提供的一种D2D通信***架构示意图，该D2D通信***包括基站和终端，基站用于给终端分配时频资源，终端利用基站所分配的时频资源进行D2D通信。D2D是一种端到端直接通信的技术，与传统的蜂窝通信技术最大的不同在于，终端与终端之间的通信不再需要基站的中转直接就可以进行通信，基站可以进行资源的配置、调度、协调等，辅助终端之间直接进行通信。
在3GPP中对D2D技术进行了讨论，LTE Rel.12中的D2D技术是采用广播的形式进行数据的传输，包含两个特性：发现(discovery)和通信(communication)。Discovery是终端周期性的广播信息，从而使得在他周围的用户可以检测到该信息并且发现该用户；Communication是两个终端之间数据的直接传输，采用调度分配(SA)+数据(Data)的机制，如图1所示。
SA：调度分配信息，是用来指示从发送D2D终端发出的数据的状态信息，SA中承载的是侧行链路控制信息(SCI：Sidelink control information),SCI中包括数据的时频资源信息，调制与编码策略(Modulation and Coding Scheme，MCS)信息等。接收端能够根据SCI的指示进行业务数据的接收；
Data：数据，发送D2D终端在SCI指示的时频资源位置，使用SCI指示的格式发出业务数据。
如果D2D的终端在小区覆盖范围内，通过基站配置或者预配置的方式为D2D终端分配传输资源池，用于D2D终端进行数据传输。该资源池是传输资源的集合，是由基站配置或者预配置的用于D2D传输的时频资源信息。如图3所示，基站可以配置不同的资源池，如discovery资源池，SA资源池，data资源池等。Data所用的传输资源是由SA中的SCI来指示的。终端根据基站广播的资源池信息或者预配置的资源池信息，在相应的资源池内发射或者侦听信号，实现D2D传输。
D2D***分为发现(discovery)和通信(communication)两种工作方式，其中通信部分又分为两种工作模式，模式1为图1的(a)，模式2为如图1的(b)。在模式1中，基站为每个D2D终端在资源池内分配确定的时频资源用于该D2D终端进行D2D的传输；在模式2中，D2D终端自主的在SA资源池内随机选取SA资源，在数据资源池中随机选取数据资源进行D2D传输。接收D2D终端在SA的资源池内盲检测SA，然后通过SA中SCI所指示的数据时频资源信息，在相应的时频资源上检测数据。
本发明实施例的反馈信息传输方法可以应用于D2D通信***中，本发明实施例的第一终端和第二终端均为D2D终端。
作为一种可选的应用场景，本发明实施例的反馈信息可以应用于车联网***中，比如车辆排队行驶，几辆车组成一个车队，第一辆车作为队首，实现对整个车队的控制，如控制整个车队的速度，车辆间距，是否允许其他车辆加入，本车队车辆离开车队等。因此需要队首车辆和车队中其他车辆之间进行单播通信，本车队的其他车辆之间也有可能进行单播通信。为了保证单播通信传输的可靠性，需要接收端发送反馈信息。队首车辆也有可能 通过广播或者组播的方式向车队的其他车辆发送消息，每个车辆向队首车辆发送反馈信息。
当队首车辆在子帧n向车队中的车辆A发送消息时，该车辆A在子帧n+k中发送反馈消息，如果该车辆A在子帧n+k中没有数据发送，则在该子帧n+k的反馈资源中单独发送反馈消息，如果该车辆A在该子帧n+k中同时有数据发送，会存在在同一子帧的反馈资源中发送反馈消息，在数据资源中发送数据消息的场景。车辆在同一子帧的不同频域资源上发送反馈信息和数据信息，会提高***的峰均功率比(PAPR)，从而降低***的有效发送功率，缩短传输距离。
本发明实施例第一方面提供的反馈信息传输方法主要用于解决，反馈信息和数据信息在同一个子帧发送时，如何进行复用传输，降低***的PAPR。
请参见图4，图4是本发明实施例提供的一种反馈信息传输方法的流程图，如图所示，该反馈信息传输方法包括但不限于如下步骤：
步骤S10：第二终端向第一终端发送第一数据；
一个实施例中，第一终端和第二终端可以包括但不限于车辆，手持设备等，第一终端和第二终端可以与基站进行通信或者，该第一终端和第二终端可以与其他的终端进行直接通信。当然第一终端和第二终端之间也可以直接进行通信。
第二终端向第一终端发送第一数据，比如可以是单播通信或者广播通信，第二终端在可以是在第二子帧向第一终端发送第一数据，比如子帧n。如图8所示，即是本发明实施例提供的一种时频资源示意图，横坐标为时域，纵坐标为频域，如图所示，第二终端在第二子帧发送第一数据，如图8所示的时频资源图，第二子帧中的SA频域资源上承载第二终端的SA，第二子帧的数据频域资源上承载第二终端的第一数据。
步骤S11：第一终端接收第二终端发送的第一数据；
步骤S12，所述第一终端在第一子帧向所述第二终端发送针对所述第一数据的反馈信息，其中，所述第一终端在所述第一子帧存在待发送的第二数据；
所述反馈信息承载在所述第二数据的侧行链路控制信息SCI中；或者，
所述反馈信息承载在携带所述第二数据的数据包中。
一个实施例中，第一终端接收到第二终端发送的第一数据后，需要向第二终端发送针对第一数据的反馈信息，可选的，反馈信息可以是确认字符(Acknowledgement，ACK)或者否定应答字符(Negative Acknowledgement，NACK)。
第一终端在第一子帧向第二终端发送针对第一数据的反馈信息，该第一子帧与第二子帧之间相差预设个数的子帧，该预设个数可以是由基站配置或者预配置的。比如，第一终端在子帧n接收到第二终端发送的第一数据，则第一终端需要在子帧n+k向第二终端发送反馈信息，k为大于或者等于1的自然数。
如图8所示，第一终端需要在第一子帧向第二终端发送针对第一数据的反馈信息，具体可选的，第一终端在第一子帧的反馈资源池中选择频域资源向第二终端发送反馈信息。同时，第一终端在第一子帧存在待发送的第二数据。如图8所示，第一终端在第一子帧的数据频域资源存在待发送的第二数据，并且第一子帧的SA频域资源存在待发送的第二数据的SA，该SA中携带SCI，该SCI用于指示第二数据的时频资源以及发送格式等等。
如果在同一子帧的不同频域资源上发送反馈信息和数据信息，会提高***的峰均功率比(PAPR)，从而降低***的有效发送功率，缩短传输距离。为了能够降低PAPR，本发明实施例提出的复用方式如下：
所述反馈信息承载在所述第二数据的侧行链路控制信息SCI中；或者，
所述反馈信息承载在携带所述第二数据的数据包中。
上述两种可选的复用方式可以避免因为额外的资源用于传输反馈信息所导致的高PAPR问题。
可选的，第一终端在SCI中携带反馈信息，同时在该SCI中还可以进一步携带第二终端的标识信息，比如ID信息。携带第二终端的ID信息的目的是，当子帧n有两个终端同时向第一终端发送数据时，用于区分该反馈信息是针对哪个发端的。
可选的，第一终端在SCI中携带第一终端的标识信息，比如第一终端的ID信息。携带第一终端的ID信息的目的是，当第二终端在子帧n向多个终端发送数据时，第一终端在SCI中携带ID信息用于区分该反馈信息以及数据信息是哪个终端发送的。
可选的，若所述反馈信息承载在携带所述第二数据的数据包中，所述数据包中还承载所述第一终端的标识信息和/或所述第二终端的标识信息。
同理，若第二终端向第一终端单播发送第一数据，该第一终端向第二终端发送针对第一数据的反馈信息时，可以是将反馈信息携带在第二数据的数据包中，同时该数据包中还承载第一终端的标识信息和/或第二终端的标识信息。
相应的，若是多个第二终端向第一终端发送第一数据，该第一终端需要针对每一个第二终端发送反馈信息，该多个第二终端的反馈信息封装于第二数据的数据包中，比如需要发送的反馈信息的数量是m个，对于每个反馈信息均需要携带相对应的第二终端的ID信息，用于第二终端判断哪些数据是被正确接收，哪些是没有正确接收。
可选的，若所述反馈信息承载在携带所述第二数据的数据包中；
在所述第二数据的SCI中携带所述反馈信息的数量指示信息，所述数量指示信息用于指示在所述数据包中携带所述反馈信息的数量。
具体的，若是多个第二终端向第一终端发送第一数据，该第一终端需要针对每一个第二终端发送反馈信息，该第一终端在SCI中携带指示数量信息(N比特)，该数量指示信息用于指示第二数据的数据包中包含多少个反馈信息，即包含多少个ACK/NACK信息。
可选的，一个第二终端向一个第一终端发送第一数据，第一终端需要向第二终端发送针对第一数据的反馈信息。比如，第一终端接收第二终端在子帧n发送的第一数据，第一终端在子帧n+k发送反馈信息，当第一终端在该子帧n+k同时有第二数据需要发送时，因为反馈信息具有更高的传输优先级，一种可行的方式是第一终端只在第一子帧的反馈频域资源上发送反馈信息，而不发送第二数据。
通过实施本发明实施例，第一终端接收第二终端发送的第一数据，该第一终端在第一子帧向第二终端发送针对第一数据的反馈信息，其中，该第一终端在第一子帧存在待发送的第二数据，反馈信息可以承载在第二数据的侧行链路控制信息SCI中，或者，该反馈信息可以承载在携带第二数据的数据包中。将反馈信息承载在SCI中或者携带第二数据的数据包中，而不使用额外的频域资源传输反馈信息，可以降低***的PAPR。
请参照图5，为本发明实施例提供的一种反馈信息传输方法的流程图，如图所示，该反馈信息传输方法包括但不限于如下步骤：
S20，第一终端向至少两个第二终端发送数据；
在一个实施例中，第一终端向至少两个第二终端广播或者组播发送数据，而该至少两个第二终端距离第一终端的距离不同，当各个第二终端在相同的时频资源上向第一终端发送反馈信息时，会造成远近效应问题，即距离离第一终端远的第二终端的反馈信息功率远远小于离第一终端距离近的第二终端，因此其反馈信息会被淹没掉，很难正确检测出来。
一种可选的应用场景是车联网***中反馈信息的传输，如图6所示，队首车辆采用广播或者组播的方式对车队中的车辆发送数据时，车队中的所有车辆需要向队首车辆发送反馈信息。如果反馈信息的反馈资源是和发送数据的发送资源的一一对应的，就会导致多个车辆使用相同的反馈资源进行反馈，从而导致反馈信息的传输冲突，降低性能。
另外，如果多个车辆的反馈信息使用相同的时频资源，但是采用码分的方式进行正交化传输。由于车队中的车辆距离队首车辆的距离不同，使得不同车辆发送的反馈信息到队首车辆的功率不同，就会导致远近效应问题。即离队首车辆远的车辆的反馈信息功率远远小于离队首车辆近的车辆，因此其反馈信息会被淹没掉，很难正确检测出来。
本发明实施例针对上述问题提出改进方案，第一终端向至少两个第二终端发送数据，该发送方式可以是广播发送或者组播发送。
S21，第二终端向所述第一终端发送针对所述数据的反馈信息；
在一个实施例中，每个第二终端接收到第一终端发送的数据后，需要向第一终端发送针对所接收数据的反馈信息，为了能够避免远近效应问题，各个第二终端发送反馈信息的时频资源均不同，具体可选的，第二终端在确定针对所接收数据的反馈信息的时频资源时，可以选择以下几种可选的实施方式：
可选的，所述第二终端发送的针对所述数据的反馈信息占用的时频资源的标识由所述第一终端的标识信息和/或所述第二终端的标识信息确定；或者，
所述第二终端发送的针对所述数据的反馈信息占用的时频资源由所述第一终端指示；或者，
所述第二终端发送的针对所述数据的反馈信息占用的时频资源为反馈资源集合中与所述第二终端对应的时频资源，所述反馈资源集合中包括至少两个时频资源，一个所述第二终端对应一个时频资源。
S22，所述第一终端接收所述至少两个第二终端中每个第二终端发送的针对所述数据的反馈信息，其中，每个所述第二终端发送的针对所述数据的反馈信息占用的时频资源不同。
在一个实施例中，第一终端接收该至少两个第二终端中每个第二终端发送的针对所接收数据的反馈信息，由于每个第二终端发送的反馈信息所占用的时频资源不同，因此可以避免远近效应问题。
通过实施本发明实施例，第一终端向至少两个第二终端广播发送数据时，多个第二终端采用不同的时频资源向该第一终端发送针对该数据的反馈信息，从而避免多个第二终端使用相同的时频资源进行反馈导致的远近效应问题。
请参照图7，为本发明实施例提供的一种反馈信息传输方法的流程图，如图所示，该反馈信息传输方法包括但不限于如下步骤：
S30，第一终端向第二终端发送目标数据；
在一个实施例中，在引入单播传输后，***中存在两种传输方式：单播传输和广播传输。单播传输的方式需要接收端进行反馈，广播传输的方式不需要接收端的反馈。但是当接收端检测数据，并且检测失败的时候，该接收端很难识别出该数据是单播传输还是广播传输的，因此终端也无法知道是否需要发送反馈信息，因为广播传输一般不需要反馈，单播传输才需要反馈。对于单播传输的发送端，就无法接收到接收端的反馈信息。
本发明实施例在上述基础上进行了改进，主要针对单播传输的场景，因为若第一终端广播发送目标数据时，无论第二终端是否正确接收到目标数据均不需要进行反馈。本发明实施例中，第一终端通过单播传输方式向第二终端发送目标数据。
S31，所述第一终端在预设反馈信道资源上检测是否存在所述第二终端发送的反馈信息；
可选的，所述预设反馈信道资源由所述第一终端的标识信息和/或所述第二终端的标识信息确定；或者，
所述预设反馈信道资源包括第一子帧和第二子帧之间的时频资源，所述第一子帧为所述反馈信息的预测开始位置，所述第二子帧为所述反馈信息的预测结束位置。
在一个实施例中，第二终端接收到第一终端发送的目标数据后，如果第二终端检测错误，则无法识别该目标数据是通过单播传输方式传输还是广播传输方式传输，因此第二终端不发送反馈信息。
由于第一终端是通过单播传输方式发送目标数据的，因此第一终端会在预设反馈信道资源上检测是否存在第二终端发送的反馈信息。
可选的，该预设反馈信道资源可以是由第一终端的UE ID和/或第二终端的UE ID确定。
或者，第一终端在子帧[n+m,n+m+k]上搜索反馈信息，其中n表示第一终端单播传输目标数据的时刻，n+m表示反馈信息可能出现的第一个子帧位置，n+m+k表示反馈信息可能出现的最后一个子帧位置。
S32，若所述第一终端未检测到所述第二终端发送的反馈信息，所述第一终端重传所述目标数据。
在一个实施例中，若第一终端未检测到第二终端发送的反馈信息，则该第一终端重传目标数据。通过实施本发明实施例，接收端(即第二终端)无法识别单播或者组播的情况下，无法进行反馈信息的传输，发送端(即第一终端)可以通过检测反馈信息是否存在来判断是否需要进行重传。
通过实施本发明实施例，第一终端向第二终端单播发送目标数据，若第二终端对该数据检测失败，则无法获知该数据是单播传输还是广播传输，因此第二终端也无法确定是否需要发送反馈信息，本发明实施例中，只要第二终端检测数据错误均不发送反馈信息，该第一终端在预设反馈信道资源上检测是否存在第二终端发送的反馈信息，若没有检测到反馈信息，则自动进行数据重传，提高数据传输的可靠性。
上述详细阐述了本发明实施例的方法，下面提供了本发明实施例的装置。
参阅图9a和图9b，为本发明实施例提供的反馈信息传输装置的结构示意图，本发明实施例的反馈信息传输装置可以应用于图4实施例的第一终端，第一终端可以是任意D2D终端。
如图9a所示，该装置可包括：接收单元101和发送单元102，其中：
接收单元101，可用于执行以上图4方法中所描述的第一终端所执行的接收动作；
发送单元102，可用于执行以上图4方法中所描述的第一终端所执行的发送动作；
其中，接收单元101和发送单元102可以采用图9b中的收发器1001实现。
具体细节，可以参考以上方法中的描述，在此不予赘述。
比如，接收单元101，用于接收第二终端发送的第一数据；
发送单元102，用于在第一子帧向所述第二终端发送针对所述第一数据的反馈信息，其中，所述第一终端在所述第一子帧存在待发送的第二数据；
所述反馈信息承载在所述第二数据的SCI中；或者，
所述反馈信息承载在携带所述第二数据的数据包中。
可选的，所述接收单元具体用于在第二子帧接收第二终端发送的第一数据，所述第一子帧与所述第二子帧之间相差预设个数的子帧，所述预设个数是由基站配置或者预配置的。
可选的，若所述反馈信息承载在携带所述第二数据的数据包中，所述数据包中还承载所述第一终端的标识信息和/或所述第二终端的标识信息。
可选的，若所述反馈信息承载在携带所述第二数据的数据包中；
在所述第二数据的SCI中携带所述反馈信息的数量指示信息，所述数量指示信息用于指示在所述数据包中携带所述反馈信息的数量。
对应的，如图9b所示，该装置可包括：收发器1001和处理器1002。处理器1002用于控制该装置的操作，包括通过收发器1001将反馈信息进行时频资源映射(包括接收和/或发送)。进一步的，还可以包括存储器1003，存储器1003可以包括只读存储器和随机存取存储器，用于向处理器1002提供指令和数据。存储器1003可以集成于处理器1002中，也可以独立于处理器1002。存储器1003的一部分还可以包括非易失行随机存取存储器(NVRAM)。该装置的各个组件通过总线***耦合在一起，其中总线***1009除包括数据总线之外，还包括电源总线、控制总线和状态信号总线。但是为了清楚说明起见，在图中将各种总线都标为总线***1009。
本申请实施例图4的第一终端侧所揭示的流程可以应用于收发器1001和处理器1002中。在实现过程中，该装置实现的流程的各步骤可以通过处理器1002中的硬件的集成逻辑电路或者软件形式的指令完成。处理器1002可以是通用处理器、数字信号处理器、专用集成电路、现场可编程门阵列或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件，可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程 存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器1003，处理器1002读取存储器1003中的信息，结合其硬件完成本发明实施例指示流程的步骤。
可选的，收发器1001用于接收第二终端发送的第一数据；
收发器1001还用于在第一子帧向所述第二终端发送针对所述第一数据的反馈信息，其中，所述第一终端在所述第一子帧存在待发送的第二数据；
所述反馈信息承载在所述第二数据的SCI中；或者，
所述反馈信息承载在携带所述第二数据的数据包中。
可选的，收发器1001还用于在第二子帧接收第二终端发送的第一数据，所述第一子帧与所述第二子帧之间相差预设个数的子帧，所述预设个数是由基站配置或者预配置的。
可选的，若所述反馈信息承载在携带所述第二数据的数据包中，所述数据包中还承载所述第一终端的标识信息和/或所述第二终端的标识信息。
可选的，若所述反馈信息承载在携带所述第二数据的数据包中；
在所述第二数据的SCI携带所述反馈信息的数量指示信息，所述数量指示信息用于指示在所述数据包中携带所述反馈信息的数量。
当所述装置为用户设备时，还可以进一步包括输入设备，如键盘，输出设备，如显示屏等结构。
参阅图10a和图10b，为本发明实施例提供的反馈信息传输装置的结构示意图，本发明实施例的反馈信息传输装置可以应用于图5实施例的第一终端，第一终端可以是任意D2D终端，第一终端向至少两个第二终端广播发送数据，该第二终端也可以是D2D终端。
如图10a所示，该装置可包括：发送单元201和接收单元202，其中：
发送单元201，可用于执行以上图5方法中所描述的第一终端所执行的发送动作；
接收单元202，可用于执行以上图5方法中所描述的第一终端所执行的发送动作；
其中，发送单元201和接收单元202可以采用图10b中的收发器2001实现。
具体细节，可以参考以上方法中的描述，在此不予赘述。
比如，发送单元201，用于向至少两个第二终端发送数据；
接收单元202，用于接收所述至少两个第二终端中每个第二终端发送的针对所述数据的反馈信息，其中，每个所述第二终端发送的针对所述数据的反馈信息占用的时频资源不同。
可选的，所述第二终端发送的针对所述数据的反馈信息占用的时频资源的标识由所述第一终端的标识信息和/或所述第二终端的标识信息确定；或者，
所述第二终端发送的针对所述数据的反馈信息占用的时频资源由所述第一终端指示；或者，
所述第二终端发送的针对所述数据的反馈信息占用的时频资源为反馈资源集合中与所述第二终端对应的时频资源，所述反馈资源集合中包括至少两个时频资源，一个所述第二终端对应一个时频资源。
对应的，如图10b所示，该装置可包括：收发器2001和处理器2002。处理器2002用于控制该装置的操作，包括通过收发器2001向第二终端发送数据，以及接收第二终端发送 的针对所述数据的反馈信息。进一步的，还可以包括存储器2003，存储器2003可以包括只读存储器和随机存取存储器，用于向处理器2002提供指令和数据。存储器2003可以集成于处理器2002中，也可以独立于处理器2002。存储器2003的一部分还可以包括非易失行随机存取存储器(NVRAM)。该装置的各个组件通过总线***耦合在一起，其中总线***2009除包括数据总线之外，还包括电源总线、控制总线和状态信号总线。但是为了清楚说明起见，在图中将各种总线都标为总线***2009。
本申请实施例图5的第一终端侧所揭示的流程可以应用于收发器2001和处理器2002中。在实现过程中，该装置实现的流程的各步骤可以通过处理器2002中的硬件的集成逻辑电路或者软件形式的指令完成。处理器2002可以是通用处理器、数字信号处理器、专用集成电路、现场可编程门阵列或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件，可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器2003，处理器2002读取存储器2003中的信息，结合其硬件完成本发明实施例指示流程的步骤。
可选的，收发器2001用于向至少两个第二终端发送数据；
收发器1001还用于接收所述至少两个第二终端中每个第二终端发送的针对所述数据的反馈信息，其中，每个所述第二终端发送的针对所述数据的反馈信息占用的时频资源不同。
可选的，所述第二终端发送的针对所述数据的反馈信息占用的时频资源的标识由所述第一终端的标识信息和/或所述第二终端的标识信息确定；或者，
所述第二终端发送的针对所述数据的反馈信息占用的时频资源由所述第一终端指示；或者，
所述第二终端发送的针对所述数据的反馈信息占用的时频资源为反馈资源集合中与所述第二终端对应的时频资源，所述反馈资源集合中包括至少两个时频资源，一个所述第二终端对应一个时频资源。
当所述装置为用户设备时，还可以进一步包括输入设备，如键盘，输出设备，如显示屏等结构。
参阅图11a和图11b，为本发明实施例提供的反馈信息传输装置的结构示意图，本发明实施例的反馈信息传输装置可以应用于图7实施例的第一终端，第一终端可以是任意D2D终端，第一终端向第二终端发送数据，该第二终端也可以是D2D终端。
如图11a所示，该装置可包括：发送单元301、检测单元302以及重传单元303，其中：
发送单元301，可用于执行以上图7方法中所描述的第一终端所执行的发送动作；
检测单元302，可用于执行以上图7方法中所描述的第一终端所执行的检测动作；
重传单元303，可用于执行以上图7方法中所描述的第一终端所执行的重传动作
其中，发送单元301和重传单元303可以采用图11b中的收发器3001实现。
检测单元302可以采用图11b中的收发器3002实现。
具体细节，可以参考以上方法中的描述，在此不予赘述。
比如，发送单元301，用于向第二终端发送目标数据；
检测单元302，用于在预设反馈信道资源上检测是否存在所述第二终端发送的反馈信息；
重传单元303，用于若未检测到所述第二终端发送的反馈信息，重传所述目标数据。
可选的，所述预设反馈信道资源由所述第一终端的标识信息和/或所述第二终端的标识信息确定；或者，
所述预设反馈信道资源包括第一子帧和第二子帧之间的时频资源，所述第一子帧为所述反馈信息的预测开始位置，所述第二子帧为所述反馈信息的预测结束位置。
对应的，如图11b所示，该装置可包括：收发器3001和处理器3002。处理器3002用于控制该装置的操作，包括通过收发器3001向第二终端发送目标数据，以及重传目标数据。进一步的，还可以包括存储器3003，存储器3003可以包括只读存储器和随机存取存储器，用于向处理器3002提供指令和数据。存储器3003可以集成于处理器3002中，也可以独立于处理器3002。存储器3003的一部分还可以包括非易失行随机存取存储器(NVRAM)。该装置的各个组件通过总线***耦合在一起，其中总线***3009除包括数据总线之外，还包括电源总线、控制总线和状态信号总线。但是为了清楚说明起见，在图中将各种总线都标为总线***3009。
本申请实施例图7的第一终端侧所揭示的流程可以应用于收发器3001和处理器3002中。在实现过程中，该装置实现的流程的各步骤可以通过处理器3002中的硬件的集成逻辑电路或者软件形式的指令完成。处理器3002可以是通用处理器、数字信号处理器、专用集成电路、现场可编程门阵列或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件，可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器3003，处理器3002读取存储器3003中的信息，结合其硬件完成本发明实施例指示流程的步骤。
可选的，收发器3001用于向第二终端发送目标数据；
处理器3002，用于在预设反馈信道资源上检测是否存在所述第二终端发送的反馈信息；
收发器1001还用于若未检测到所述第二终端发送的反馈信息，重传所述目标数据。
可选的，所述预设反馈信道资源由所述第一终端的标识信息和/或所述第二终端的标识信息确定；或者，
所述预设反馈信道资源包括第一子帧和第二子帧之间的时频资源，所述第一子帧为所述反馈信息的预测开始位置，所述第二子帧为所述反馈信息的预测结束位置。
当所述装置为用户设备时，还可以进一步包括输入设备，如键盘，输出设备，如显示屏等结构。
本领域普通技术人员可以理解实现上述实施例方法中的全部或部分流程，该流程可以 由计算机程序来指令相关的硬件完成，该程序可存储于计算机可读取存储介质中，该程序在执行时，可包括如上述各方法实施例的流程。而前述的存储介质包括：ROM或随机存储记忆体RAM、磁碟或者光盘等各种可存储程序代码的介质。

Claims (16)

  1. 一种反馈信息传输方法，其特征在于，包括：
    第一终端接收第二终端发送的第一数据；
    所述第一终端在第一子帧向所述第二终端发送针对所述第一数据的反馈信息，其中，所述第一终端在所述第一子帧存在待发送的第二数据；
    所述反馈信息承载在所述第二数据的侧行链路控制信息SCI中；或者，
    所述反馈信息承载在携带所述第二数据的数据包中。
  2. 如权利要求1所述的方法，其特征在于，所述第一终端接收第二终端发送的第一数据，包括：
    第一终端在第二子帧接收第二终端发送的第一数据，所述第一子帧与所述第二子帧之间相差预设个数的子帧，所述预设个数是由基站配置或者预配置的。
  3. 如权利要求1所述的方法，其特征在于，若所述反馈信息承载在携带所述第二数据的数据包中；
    在所述第二数据的侧行链路控制信息SCI中携带所述反馈信息的数量指示信息，所述数量指示信息用于指示在所述数据包中携带所述反馈信息的数量。
  4. 如权利要求1-3任意一项所述的方法，其特征在于，若所述反馈信息承载在携带所述第二数据的数据包中，所述数据包中还承载所述第一终端的标识信息和/或所述第二终端的标识信息。
  5. 一种反馈信息传输方法，其特征在于，包括：
    第一终端向至少两个第二终端发送数据；
    所述第一终端接收所述至少两个第二终端中每个第二终端发送的针对所述数据的反馈信息，其中，每个所述第二终端发送的针对所述数据的反馈信息占用的时频资源不同。
  6. 如权利要求5所述的方法，其特征在于，所述第二终端发送的针对所述数据的反馈信息占用的时频资源的标识由所述第一终端的标识信息和/或所述第二终端的标识信息确定；或者，
    所述第二终端发送的针对所述数据的反馈信息占用的时频资源由所述第一终端指示；或者，
    所述第二终端发送的针对所述数据的反馈信息占用的时频资源为反馈资源集合中与所述第二终端对应的时频资源，所述反馈资源集合中包括至少两个时频资源，一个所述第二终端对应一个时频资源。
  7. 一种反馈信息传输方法，其特征在于，包括：
    第一终端向第二终端发送目标数据；
    所述第一终端在预设反馈信道资源上检测是否存在所述第二终端发送的反馈信息；
    若所述第一终端未检测到所述第二终端发送的反馈信息，所述第一终端重传所述目标数据。
  8. 如权利要求7所述的方法，其特征在于，所述预设反馈信道资源由所述第一终端的标识信息和/或所述第二终端的标识信息确定；或者，
    所述预设反馈信道资源包括第一子帧和第二子帧之间的时频资源，所述第一子帧为所述反馈信息的预测开始位置，所述第二子帧为所述反馈信息的预测结束位置。
  9. 一种反馈信息传输装置，应用于第一终端，其特征在于，包括：
    接收单元，用于接收第二终端发送的第一数据；
    发送单元，用于在第一子帧向所述第二终端发送针对所述第一数据的反馈信息，其中，所述第一终端在所述第一子帧存在待发送的第二数据；
    所述反馈信息承载在所述第二数据的SCI中；或者，
    所述反馈信息承载在携带所述第二数据的数据包中。
  10. 如权利要求9所述的装置，其特征在于，所述接收单元具体用于在第二子帧接收第二终端发送的第一数据，所述第一子帧与所述第二子帧之间相差预设个数的子帧，所述预设个数是由基站配置或者预配置的。
  11. 如权利要求9所述的装置，其特征在于，若所述反馈信息承载在携带所述第二数据的数据包中；
    在所述第二数据的SCI中携带所述反馈信息的数量指示信息，所述数量指示信息用于指示在所述数据包中携带所述反馈信息的数量。
  12. 如权利要求9-11任意一项所述的装置，其特征在于，若所述反馈信息承载在携带所述第二数据的数据包中，所述数据包中还承载所述第一终端的标识信息和/或所述第二终端的标识信息。
  13. 一种反馈信息传输装置，应用于第一终端，其特征在于，包括：
    发送单元，用于向至少两个第二终端发送数据；
    接收单元，用于接收所述至少两个第二终端中每个第二终端发送的针对所述数据的反馈信息，其中，每个所述第二终端发送的针对所述数据的反馈信息占用的时频资源不同。
  14. 如权利要求13所述的装置，其特征在于，所述第二终端发送的针对所述数据的反馈信息占用的时频资源的标识由所述第一终端的标识信息和/或所述第二终端的标识信息确定；或者，
    所述第二终端发送的针对所述数据的反馈信息占用的时频资源由所述第一终端指示；或者，
    所述第二终端发送的针对所述数据的反馈信息占用的时频资源为反馈资源集合中与所述第二终端对应的时频资源，所述反馈资源集合中包括至少两个时频资源，一个所述第二终端对应一个时频资源。
  15. 一种反馈信息传输装置，应用于第一终端，其特征在于，包括：
    发送单元，用于向第二终端发送目标数据；
    检测单元，用于在预设反馈信道资源上检测是否存在所述第二终端发送的反馈信息；
    重传单元，用于若未检测到所述第二终端发送的反馈信息，重传所述目标数据。
  16. 如权利要求15所述的装置，其特征在于，所述预设反馈信道资源由所述第一终端的标识信息和/或所述第二终端的标识信息确定；或者，
    所述预设反馈信道资源包括第一子帧和第二子帧之间的时频资源，所述第一子帧为所述反馈信息的预测开始位置，所述第二子帧为所述反馈信息的预测结束位置。
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US20240163876A1 (en) 2024-05-16
CN108322414A (zh) 2018-07-24
US20190327724A1 (en) 2019-10-24
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CN116232832A (zh) 2023-06-06
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