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WO2017008305A1 - 终端到终端数据传输方法及设备 - Google Patents

终端到终端数据传输方法及设备 Download PDF

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Publication number
WO2017008305A1
WO2017008305A1 PCT/CN2015/084235 CN2015084235W WO2017008305A1 WO 2017008305 A1 WO2017008305 A1 WO 2017008305A1 CN 2015084235 W CN2015084235 W CN 2015084235W WO 2017008305 A1 WO2017008305 A1 WO 2017008305A1
Authority
WO
WIPO (PCT)
Prior art keywords
subframe
transmitting
dmrs
ofdm symbols
terminal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2015/084235
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English (en)
French (fr)
Inventor
赵振山
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to JP2018501932A priority Critical patent/JP6619867B2/ja
Priority to EP15898032.6A priority patent/EP3300283B1/en
Priority to PCT/CN2015/084235 priority patent/WO2017008305A1/zh
Priority to EP19168541.1A priority patent/EP3675408A1/en
Priority to CN201580065313.8A priority patent/CN107005375B/zh
Publication of WO2017008305A1 publication Critical patent/WO2017008305A1/zh
Priority to US15/852,784 priority patent/US20180123756A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • 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
    • H04L1/22—Arrangements for detecting or preventing errors in the information received using redundant apparatus to increase reliability
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • 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
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames

Definitions

  • the embodiments of the present invention relate to communication technologies, and in particular, to a terminal-to-terminal data transmission method and device.
  • the Device to Device (D2D) technology is a technology in which a terminal directly communicates with a terminal.
  • D2D technology communication between terminals can be realized without the relay of a base station.
  • FIG. 1 is a schematic diagram of a D2D communication scenario.
  • data transmitted between the terminal 101 and the terminal 102 does not need to be transited by the base station 103 to reach the other party, and resources used by the terminal 101 and the terminal 102 to transmit data may be Base station 103 is configured, scheduled, and coordinated.
  • the spectrum resource occupied by the signal is a high frequency resource, or the terminal transmitting the signal moves faster, the channel characteristics of the wireless channel through which the signal is transmitted may change rapidly, so that The terminal receiving the signal cannot accurately acquire the data transmitted by the terminal transmitting the signal, resulting in low reliability of data transmission in D2D communication.
  • the embodiments of the present invention provide a terminal-to-terminal data transmission method and device, which are used to improve the reliability of data transmission in D2D communication when a channel changes rapidly.
  • an embodiment of the present invention provides a terminal-to-terminal data transmission method, including:
  • the terminal determines a frame structure of the subframe used for communication
  • the terminal implements communication with other terminals through the subframe
  • the number of orthogonal frequency division multiplexing (OFDM) symbols used to transmit a De-Modulation Reference Signal (DMRS) in the subframe is at least three.
  • the OFDM symbols for transmitting the DMRS are spaced apart in the subframe.
  • the number of OFDM symbols used for transmitting the DMRS in the subframe is at least three, and the OFDM of the DMRS is transmitted.
  • the symbols are spaced apart in the subframe, specifically:
  • the number of OFDM symbols used for transmitting data is up to four;
  • the number of OFDM symbols is up to 4 and at least one;
  • the number of OFDM symbols is at most four and at least one.
  • any two adjacent OFDM symbols used for transmitting the DMRS in the subframe The number of OFDM symbols used to transmit data is the same.
  • the subframe includes 14 OFDM symbols, and any two of the subframes used for transmitting the DMRS Between three adjacent OFDM symbols, the number of OFDM symbols used to transmit data is three or four; or,
  • the subframe includes 12 OFDM symbols, and between the two adjacent OFDM symbols used for transmitting the DMRS in the subframe, the number of OFDM symbols used for transmitting data is 2 or 3.
  • the subframe includes 14 OFDM symbols, where the subframe is used for transmission
  • the OFDM symbol of the DMRS is the 4th OFDM symbol, the 7th OFDM symbol, and the 11th OFDM symbol; or, the OFDM symbol used for transmitting the DMRS in the subframe is the 4th OFDM symbol, the 8th OFDM symbol, and The 11th OFDM symbol.
  • the terminal is a transmitting end, the other The terminal is a receiving end;
  • the terminal implements communication with other terminals by using the subframe, including:
  • the sending end acquires a subframe for carrying data
  • the terminal is a receiving end, the other The terminal is a sender;
  • the terminal implements communication with other terminals by using the subframe, including:
  • the receiving end demodulates the subframe by using a DMRS in the subframe to obtain data carried in the subframe.
  • an embodiment of the present invention provides a terminal, including:
  • a determining module configured to determine a frame structure of a subframe used for communication
  • a communication module configured to implement communication with other terminals by using the subframe
  • the number of orthogonal frequency division multiplexing OFDM symbols used for transmitting the demodulation reference signal DMRS in the subframe is at least three, and the OFDM symbols used for transmitting the DMRS are spaced apart in the subframe.
  • the number of OFDM symbols used for transmitting the DMRS in the subframe is at least three, and the OFDM symbol of the transmission DMRS is in the sub
  • the interval distribution in the frame is specifically as follows:
  • the number of OFDM symbols used for transmitting data is up to four;
  • the number of OFDM symbols is up to 4 and at least one;
  • the number of OFDM symbols is at most four and at least one.
  • any two adjacent OFDM symbols used for transmitting the DMRS in the subframe The number of OFDM symbols used to transmit data is the same.
  • the subframe includes 14 OFDM symbols, and any two of the subframes used for transmitting the DMRS Between three adjacent OFDM symbols, the number of OFDM symbols used to transmit data is three or four; or,
  • the subframe includes 12 OFDM symbols, and any of the subframes used for transmitting the DMRS Between two adjacent OFDM symbols, the number of OFDM symbols used to transmit data is two or three.
  • the subframe includes 14 OFDM symbols, where the subframe is used for transmission
  • the OFDM symbol of the DMRS is the 4th OFDM symbol, the 7th OFDM symbol, and the 11th OFDM symbol; or, the OFDM symbol used for transmitting the DMRS in the subframe is the 4th OFDM symbol, the 8th OFDM symbol, and The 11th OFDM symbol.
  • the terminal is a sending end, and the other The terminal is a receiving end;
  • the communication module includes:
  • a first acquiring unit configured to acquire a subframe for carrying data
  • a sending unit configured to send data and a DMRS to the receiving end by using the subframe, where the DMRS is used by the receiving end to demodulate the subframe by using a DMRS in the subframe, and obtain the bearer in the sub The data in the frame.
  • the terminal is a receiving end, the other The terminal is a sending end;
  • the communication module includes:
  • a receiving unit configured to receive a subframe that carries data that is sent by the sending end
  • a second acquiring unit configured to demodulate the subframe by using a DMRS in the subframe to obtain data carried in the subframe.
  • the terminal acquires a subframe for transmitting data; the terminal transmits data through the subframe; and the orthogonal frequency division multiplexing OFDM for transmitting the demodulation reference signal DMRS in the subframe
  • the number of symbols is at least three and spaced apart, and the density of the OFDM symbols used for transmitting the DMRS in the subframe is increased, so that when the channel changes rapidly, the receiving end may be in the subframe according to the at least three DMRSs.
  • the data is accurately demodulated to accurately acquire the data transmitted by the transmitting end, thereby improving the reliability of data transmission in D2D communication.
  • 1 is a schematic diagram of a D2D communication scenario
  • FIG. 2 is a flowchart of a method for transmitting data from a terminal to a terminal according to an embodiment of the present invention
  • FIG. 3 is a schematic structural diagram 1 of a normal CP subframe according to an embodiment of the present invention.
  • 4a is a schematic structural diagram 2 of a normal CP subframe according to an embodiment of the present invention.
  • 4b is a schematic structural diagram 3 of a normal CP subframe according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram 1 of an extended CP subframe according to an embodiment of the present invention.
  • 6a is a schematic structural diagram 4 of a normal CP subframe according to an embodiment of the present invention.
  • 6b is a schematic structural diagram 5 of a normal CP subframe according to an embodiment of the present invention.
  • 6c is a schematic structural diagram 6 of a normal CP subframe according to an embodiment of the present invention.
  • 6d is a schematic structural diagram 7 of a normal CP subframe according to an embodiment of the present invention.
  • FIG. 7a is a schematic structural diagram 8 of a normal CP subframe according to an embodiment of the present invention.
  • FIG. 7b is a schematic structural diagram IX of a normal CP subframe according to an embodiment of the present invention.
  • FIG. 8a is a schematic structural diagram 2 of an extended CP subframe according to an embodiment of the present invention.
  • FIG. 8b is a schematic structural diagram 3 of an extended CP subframe according to an embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram 4 of an extended CP subframe according to an embodiment of the present invention.
  • 9b is a schematic structural diagram 5 of an extended CP subframe according to an embodiment of the present invention.
  • FIG. 10 is a schematic structural diagram 1 of a terminal according to an embodiment of the present invention.
  • FIG. 11 is a second schematic structural diagram of a terminal according to an embodiment of the present invention.
  • FIG. 12 is a schematic structural diagram 3 of a terminal according to an embodiment of the present invention.
  • FIG. 13 is a schematic structural diagram 4 of a terminal provided by the present invention.
  • the terminal-to-terminal data transmission method of this embodiment includes:
  • the terminal determines a frame structure of a subframe used for communication.
  • the terminal implements communication with other terminals through a subframe.
  • the number of OFDM symbols used for transmitting the DMRS in the subframe is at least three, and the OFDM symbols used for transmitting the DMRS are spaced apart in the subframe.
  • the terminal may be a transmitting end or a receiving end.
  • the terminal and other terminals Before the terminal communicates with other terminals, the terminal and other terminals have determined the structure of the subframe used for communication, and the terminal and other terminals pass the sub-frame.
  • the frame can implement communication; optionally, the terminal can determine the frame structure of the subframe used for communication according to the protocol or the preset communication criterion.
  • the terminal can also determine the frame structure of the subframe used for communication by other means, and the present invention There is no limit to this.
  • the transmitting end acquires a subframe for carrying data; the transmitting end sends the data and the DMRS to the receiving end through the subframe, so that the receiving end demodulates through the DMRS in the subframe.
  • a subframe acquires data carried in the subframe.
  • the sending end Before the sending end sends data to the receiving end, the resource for sending data needs to be obtained.
  • the sending end can obtain the resource for sending data by using the following possible implementation manners.
  • the sending end sends status information for applying for resources to the base station, and the base station allocates resources for sending data according to the status information of the sending end.
  • the base station broadcasts a resource pool available to the sender, and the sender acquires resources for sending data in a contention manner.
  • the receiving end receives the sub-frame of the bearer data sent by the transmitting end; the receiving end demodulates the sub-frame by using the DMRS in the sub-frame to obtain the data carried in the sub-frame.
  • the number of OFDM symbols used for transmitting the DMRS is at least three and spaced, for example, 14 OFDM in the extended CP subframe, for transmitting the DMRS.
  • the number of OFDM symbols is 3 or 4 or 5 or 6, etc.
  • the OFDM symbols used for transmitting DMRS are OFDM symbols for transmitting data, and the density of OFDM symbols used for transmitting DMRS is increased. Reducing the distance between the OFDM symbol used to transmit the DMRS and the OFDM symbol used to transmit the data, when the channel occurs quickly When the channel characteristics of the OFDM symbols in the transmission subframe are similar, the receiving end can accurately acquire the data sent by the transmitting end during the demodulation process of the subframe.
  • the terminal-to-terminal data transmission method provided by the embodiment of the present invention, the terminal determines the frame structure of the subframe used for communication, and implements communication with other terminals through the subframe, where the OFDM symbols for transmitting the DMRS are used in the subframe.
  • the number of OFDM symbols used for transmitting DMRS is distributed in a subframe and spaced apart, and the density of OFDM symbols used for transmitting DMRS in the subframe is increased.
  • the receiving end according to the at least three The DMRS can accurately demodulate the data in the subframe to accurately acquire the data sent by the transmitting end, thereby improving the reliability of data transmission in the D2D communication.
  • the number of OFDM symbols used for transmitting the DMRS in the subframe is three, and the OFDM symbols used for transmitting the DMRS are spaced apart in the subframe, and are used for transmitting the DMRS with respect to the two OFDM symbols.
  • the pilot density is increased in the time domain such that the OFDM symbols used to transmit the data are closer to the adjacent pilots, on the pilot symbols and the data symbols. The channel changes less with time, so the channel estimate is more accurate. If 4 or more OFDM symbols are used for transmitting DMRS, although the channel estimation accuracy can be further improved, the corresponding reduction of OFDM symbols for transmitting data leads to a decrease in transmission efficiency of the system.
  • the position of the OFDM symbol used for transmitting the DMRS in the subframe in the subframe needs to satisfy the following condition: the adjacent two OFDM symbols used for transmitting the DMRS in the subframe
  • the number of OFDM symbols used for transmitting data is up to four; the number of OFDM symbols is up to four and at least one before the position of the OFDM symbol used for transmitting the first DMRS in the subframe; After the position of the OFDM symbol used for transmitting the last DMRS in the subframe, the number of OFDM symbols is at most four and at least one.
  • FIG. 3 is a schematic structural diagram 1 of a normal CP subframe according to an embodiment of the present invention.
  • the number of OFDM symbols used for transmitting DMRS in the subframe is three, and the first OFDM symbol ( 0) shown in Figure 3 is used for automatic gain adjustment, and 2, 4, 6, 7, 8, 9, 11, 12, 13 OFDM symbols are used to transmit data, and 3, 5, and 10 symbols are used.
  • the DMRS is transmitted, and the 14th OFDM symbol (13 shown in FIG. 3) is used for the guard interval.
  • the number of OFDM symbols used for transmitting data between the third OFDM symbol and the fifth OFDM symbol is one, the fourth OFDM symbol and the tenth OFDM symbol
  • the number of OFDM symbols used to transmit data between the numbers is four; the number of OFDM symbols before the position of the third OFDM symbol (the OFDM symbol of the first DMRS) is two; the tenth OFDM symbol After the position of the OFDM symbol of the last DMRS is transmitted, the number of OFDM symbols is four.
  • the third, sixth, and ten OFDM symbols can also be used for transmitting DMRS, as long as the OFDM symbol used for transmitting the DMRS in the subframe is used.
  • the number is at least three, and the position in the subframe needs to satisfy the above conditions at the same time.
  • the subframe includes three OFDM symbols for transmitting the DMRS; further
  • the location of the OFDM symbol used for transmitting the DMRS in the subframe is described in detail below; specifically, the OFDM for transmitting the DMRS
  • the position of the symbol in the subframe can include the following:
  • an OFDM symbol for transmitting a DMRS in a normal CP subframe, includes at least a fourth OFDM symbol and an eleventh OFDM symbol; and in an extended CP subframe, an OFDM symbol for transmitting a DMRS includes at least a third
  • the OFDM symbol and the ninth OFDM symbol are respectively described below in detail in the case of the OFDM symbol for transmitting the DMRS in the normal CP subframe and the extended CP subframe.
  • FIG. 4 is a schematic structural diagram of a normal CP subframe according to an embodiment of the present invention.
  • an OFDM symbol for transmitting a DMRS in the normal CP subframe includes at least a fourth OFDM symbol and an eleventh OFDM symbols.
  • FIG. 4A is a schematic structural diagram 2 of a normal CP subframe according to an embodiment of the present invention. referring to FIG. 4a, an OFDM symbol used for transmitting a DMRS in the normal CP subframe is a fourth OFDM symbol, a seventh OFDM symbol, and an eleventh OFDM symbols.
  • FIG. 4b is a schematic structural diagram 3 of a normal CP subframe according to an embodiment of the present invention. referring to FIG. 4b, an OFDM symbol used for transmitting a DMRS in the normal CP subframe is a fourth OFDM symbol, an eighth OFDM symbol, and an eleventh OFDM symbols.
  • the OFDM symbol for transmitting the DMRS includes the fourth OFDM symbol and the eleventh OFDM symbol, and the DMRS may also be transmitted through the sixth or ninth OFDM symbol in the subframe.
  • an OFDM symbol used for transmitting a DMRS includes at least a third OFDM symbol and a ninth OFDM symbol;
  • the OFDM symbols used to transmit the DMRS in the extended CP subframe are the 3rd OFDM symbol, the 6th OFDM symbol, and the 9th OFDM symbol.
  • the OFDM symbol used for transmitting the DMRS includes the third OFDM symbol and the ninth OFDM symbol, and may also pass the The DMRS is transmitted in 5 or 7th OFDM symbols.
  • the normal CP subframe or the extended CP sub-capture with better performance in the embodiment of the present invention can be obtained by making minor modifications to the existing poor performance normal CP subframe or extended CP subframe.
  • the frame further improves the efficiency of obtaining the normal CP subframe or the extended CP subframe in the embodiment of the present invention.
  • the number of OFDM symbols used to transmit data is the same between any two adjacent OFDM symbols used for transmitting DMRS in a subframe.
  • the position of the OFDM symbol used for transmitting the DMRS in the normal CP subframe and the extended CP subframe will be described in detail below.
  • the number of OFDM symbols used for transmitting data is three or four.
  • FIG. 6a-6d are schematic diagrams showing the structure of a normal CP subframe according to an embodiment of the present invention. Referring to FIG. 6a to FIG. 6d, between any two adjacent OFDM symbols for transmitting DMRS in the normal CP subframe, The number of OFDM symbols used to transmit data is three.
  • FIG. 6 is a schematic structural diagram of a normal CP subframe according to an embodiment of the present invention.
  • an OFDM symbol used for transmitting a DMRS in the normal CP subframe is a second OFDM symbol, a sixth OFDM symbol, and a tenth OFDM symbols.
  • 6b is a schematic structural diagram 5 of a normal CP subframe according to an embodiment of the present invention.
  • an OFDM symbol used for transmitting a DMRS in the normal CP subframe is a third OFDM symbol, a seventh OFDM symbol, and an eleventh OFDM symbols.
  • 6c is a schematic structural diagram 6 of a normal CP subframe according to an embodiment of the present invention.
  • an OFDM symbol used for transmitting a DMRS in the normal CP subframe is a 4th OFDM symbol, an 8th OFDM symbol, and a 12th. OFDM symbols.
  • FIG. 6 is a schematic structural diagram of a normal CP subframe according to an embodiment of the present invention.
  • an OFDM symbol used for transmitting a DMRS in the normal CP subframe is a fifth OFDM symbol, a ninth OFDM symbol, and a thirteenth. OFDM symbols.
  • FIG. 7 is a schematic structural diagram of a normal CP subframe according to an embodiment of the present invention. Referring to FIG. 7a - FIG. 7b, between two OFDM symbols for transmitting DMRS in the normal CP subframe, The number of OFDM symbols used to transmit data is four.
  • FIG. 7A is a schematic structural diagram of a normal CP subframe according to an embodiment of the present invention.
  • an OFDM symbol used for transmitting a DMRS in the normal CP subframe is a second OFDM symbol, a seventh OFDM symbol, and a twelfth OFDM symbols.
  • FIG. 7b is a schematic structural diagram of a normal CP subframe according to an embodiment of the present invention.
  • an OFDM symbol used for transmitting a DMRS in the normal CP subframe is a third OFDM symbol, an eighth OFDM symbol, and a thirteenth OFDM symbol. OFDM symbols.
  • the number of OFDM symbols used for transmitting data is two or three.
  • FIG. 8 is a schematic structural diagram of an extended CP subframe according to an embodiment of the present invention. Referring to FIG. 8a - FIG. 8b, between two OFDM symbols for transmitting DMRS in the extended CP subframe, The number of OFDM symbols used to transmit data is two.
  • FIG. 8 is a schematic diagram of a structure of an extended CP subframe according to an embodiment of the present invention.
  • an OFDM symbol used for transmitting a DMRS in the extended CP subframe is a second OFDM symbol, a fifth OFDM symbol, and an eighth. OFDM symbols.
  • FIG. 8b is a schematic structural diagram 3 of an extended CP subframe according to an embodiment of the present invention.
  • an OFDM symbol used for transmitting a DMRS in the extended CP subframe is a fourth OFDM symbol, a seventh OFDM symbol, and a tenth OFDM symbols.
  • FIG. 9 is a schematic structural diagram of an extended CP subframe according to an embodiment of the present invention. Referring to FIG. 9a - FIG. 9b, between two OFDM symbols for transmitting DMRS in the extended CP subframe, The number of OFDM symbols used to transmit data is three.
  • FIG. 9 is a schematic structural diagram of an extended CP subframe according to an embodiment of the present invention.
  • an OFDM symbol used for transmitting a DMRS in the extended CP subframe is a second OFDM symbol, a sixth OFDM symbol, and a tenth OFDM symbols.
  • FIG. 9b is a schematic structural diagram 5 of an extended CP subframe according to an embodiment of the present invention.
  • an OFDM symbol used for transmitting a DMRS in the extended CP subframe is a third OFDM symbol, an eighth OFDM symbol, and an eleventh OFDM symbols.
  • the number of OFDM symbols used for transmitting data is the same, so that any two phases in the subframe for transmitting the DMRS are transmitted.
  • the adjacent OFDM symbols are evenly distributed in the subframe, and the receiving end can more accurately demodulate the data in the subframe according to the three uniformly distributed DMRSs.
  • FIG. 10 is a schematic structural diagram 1 of a terminal according to an embodiment of the present invention.
  • the terminal may include:
  • a determining module 1001 configured to determine a frame structure of a subframe used for communication
  • a communication module 1002 configured to implement communication with other terminals by using a subframe
  • the number of orthogonal frequency division multiplexing OFDM symbols used for transmitting the demodulation reference signal DMRS in the subframe is at least three, and the OFDM symbols used for transmitting the DMRS are spaced apart in the subframe.
  • FIG. 11 is a schematic structural diagram of a terminal according to an embodiment of the present invention.
  • the communications module 1002 includes:
  • the first obtaining unit 10021 is configured to acquire a subframe for carrying data.
  • the sending unit 10022 is configured to send data and a DMRS to the receiving end through the subframe, so that the receiving end obtains the data carried in the subframe by using the DMRS demodulation subframe in the subframe.
  • FIG. 12 is a schematic structural diagram 3 of a terminal according to an embodiment of the present invention.
  • the communications module 1002 includes:
  • the receiving unit 10023 is configured to receive a subframe that carries data that is sent by the sending end.
  • the second obtaining unit 10024 is configured to demodulate the subframe by using the DMRS in the subframe to acquire data carried in the subframe.
  • the number of OFDM symbols used for transmitting the DMRS in the subframe is at least three, and the OFDM symbols for transmitting the DMRS are spaced apart in the subframe, specifically:
  • the number of OFDM symbols used for transmitting data is up to four;
  • the number of OFDM symbols is up to 4 and at least one;
  • the number of OFDM symbols is at most four and at least one.
  • the number of OFDM symbols used to transmit data is the same between any two adjacent OFDM symbols used for transmitting DMRS in a subframe.
  • the subframe includes 14 OFDM symbols, and between any two adjacent OFDM symbols used for transmitting the DMRS in the subframe, the number of OFDM symbols used for transmitting data is 3 or 4; or
  • the subframe includes 12 OFDM symbols, and between the two adjacent OFDM symbols used for transmitting the DMRS in the subframe, the number of OFDM symbols used for transmitting data is 2 or 3.
  • the OFDM symbols used for transmitting the DMRS in the subframe are the 4th OFDM symbol, the 7th OFDM symbol, and the 11th OFDM symbol; or, in the subframe
  • the OFDM symbols used to transmit the DMRS are the 4th OFDM symbol, the 8th OFDM symbol, and the 11th OFDM symbol.
  • the terminal in this embodiment may be used to implement the technical solution of the foregoing method embodiment, and the implementation principle and the technical effect are similar, and details are not described herein again.
  • FIG. 13 is a schematic structural diagram 4 of a terminal provided by the present invention.
  • the terminal may include a processor 1301, such as a CPU, a memory 1302, at least one communication bus 1303, a transmitter 1304, and a receiver 1305.
  • Communication bus 1303 is used to implement a communication connection between components.
  • the memory 1302 may include a high speed RAM memory, and may also include a nonvolatile memory NVM, such as at least one disk memory.
  • Various programs may be stored in the memory 1302, and the processor 1301 may call various programs in the memory 1302 for completion.
  • the processor 1301 is configured to determine a frame structure of a subframe used for communication
  • a transmitter 1304 and a receiver 1305, configured to implement communication with other terminals through a subframe
  • the number of orthogonal frequency division multiplexing OFDM symbols used for transmitting the demodulation reference signal DMRS in the subframe is at least three, and the OFDM symbols used for transmitting the DMRS are spaced apart in the subframe.
  • the processor 1301 is specifically configured to acquire a subframe for carrying data.
  • the transmitter 1304 is specifically configured to send data and a DMRS to the receiving end through the subframe, so that the receiving end demodulates the subframe by using the DMRS in the subframe to obtain data carried in the subframe.
  • the receiver 1305 is specifically configured to receive a subframe that carries data that is sent by the sending end.
  • the processor 1301 is specifically configured to demodulate a subframe by using a DMRS in a subframe to acquire data carried in the subframe.
  • the number of OFDM symbols used for transmitting the DMRS in the subframe is at least three, and the OFDM symbols for transmitting the DMRS are spaced apart in the subframe, specifically:
  • the number of OFDM symbols used for transmitting data is up to four;
  • the number of OFDM symbols is up to 4 and at least one;
  • the number of OFDM symbols is at most four and at least one.
  • the number of OFDM symbols used to transmit data is the same between any two adjacent OFDM symbols used for transmitting DMRS in a subframe.
  • the subframe includes 14 OFDM symbols, and between any two adjacent OFDM symbols used for transmitting the DMRS in the subframe, the number of OFDM symbols used for transmitting data is 3 or 4; or
  • the subframe includes 12 OFDM symbols, and between the two adjacent OFDM symbols used for transmitting the DMRS in the subframe, the number of OFDM symbols used for transmitting data is 2 or 3.
  • the OFDM symbols used for transmitting the DMRS in the subframe are the 4th OFDM symbol, the 7th OFDM symbol, and the 11th OFDM symbol; or, in the subframe
  • the OFDM symbols used to transmit the DMRS are the 4th OFDM symbol, the 8th OFDM symbol, and the 11th OFDM symbol.
  • the terminal in this embodiment may be used to implement the technical solution of the foregoing method embodiment, and the implementation principle and the technical effect are similar, and details are not described herein again.
  • the foregoing program may be stored in a computer readable storage medium, and the program is executed when executed.
  • the foregoing steps include the steps of the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

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Abstract

本发明实施例提供一种终端到终端数据传输方法及设备，该终端到终端数据传输方法包括：终端确定用于通信的子帧的帧结构；所述终端通过所述子帧实现与其它终端之间的通信；其中，所述子帧中用于传输解调参考信号DMRS的正交频分复用OFDM符号的个数至少为3个，所述用于传输DMRS的OFDM符号在所述子帧中间隔分布。本发明实施例用以在信道发生快速变化时，提高D2D通信中数据传输的可靠性。

Description

终端到终端数据传输方法及设备 技术领域
本发明实施例涉及通信技术，尤其涉及一种终端到终端数据传输方法及设备。
背景技术
终端到终端(Device to Device，D2D)技术是一种终端与终端直接通信的技术，在D2D技术中，无需基站的中转即可实现终端之间的通信。
图1为D2D通信场景示意图；请参照图1，终端101与终端102之间发送的数据不需要经过基站103的中转即可到达对方，终端101与终端102之间发送数据所占用的资源可以由基站103配置、调度以及协调。然而，在D2D技术应用的过程中，若信号所占的频谱资源为高频资源，或者发送信号的终端的移动速度较快，将造成信号传输所经过的无线信道的信道特性发生快速变化，使得接收信号的终端无法准确获取发送信号的终端发送的数据，导致D2D通信中数据传输的可靠性较低。
发明内容
本发明实施例提供一种终端到终端数据传输方法及设备，用以在信道发生快速变化时，提高D2D通信中数据传输的可靠性。
第一方面，本发明实施例提供一种终端到终端数据传输方法，包括：
终端确定用于通信的子帧的帧结构；
所述终端通过所述子帧实现与其它终端之间的通信；
其中，所述子帧中用于传输解调参考信号(De-Modulation Reference Signal，DMRS)的正交频分复用(Orthogonal Frequency Division Multiplexing，OFDM)符号的个数至少为3个，所述用于传输DMRS的OFDM符号在所述子帧中间隔分布。
结合第一方面，在第一方面的第一种可能的实现方式中，所述子帧中用于传输DMRS的OFDM符号的个数至少为3个，所述传输DMRS的OFDM 符号在所述子帧中间隔分布，具体为：
所述子帧中用于传输DMRS的相邻的两个OFDM符号之间，用于传输数据的OFDM符号的个数最多为4个；
所述子帧中用于传输第一个DMRS的OFDM符号的位置之前，OFDM符号的个数最多为4个，最少为1个；
所述子帧中用于传输最后一个DMRS的OFDM符号的位置之后，OFDM符号的个数最多为4个，最少为1个。
结合第一方面或第一方面的第一种可能的实现方式，在第一方面的第二种可能的实现方式中，所述子帧中用于传输DMRS的任意两个相邻的OFDM符号之间，用于传输数据的OFDM符号的个数相同。
结合第一方面的第二种可能的实现方式，在第一方面的第三种可能的实现方式中，所述子帧中包括14个OFDM符号，所述子帧中用于传输DMRS的任意两个相邻的OFDM符号之间，用于传输数据的OFDM符号的个数为3个或4个；或者，
所述子帧中包括12个OFDM符号，所述子帧中用于传输DMRS的任意两个相邻的OFDM符号之间，用于传输数据的OFDM符号的个数为2个或3个。
结合第一方面或第一方面的第一种可能的实现方式，在第一方面的第四种可能的实现方式中，所述子帧中包括14个OFDM符号，所述子帧中用于传输DMRS的OFDM符号为第4个OFDM符号、第7个OFDM符号和第11个OFDM符号；或者，所述子帧中用于传输DMRS的OFDM符号为第4个OFDM符号、第8个OFDM符号和第11个OFDM符号。
结合第一方面或第一方面的第一种至第四种可能的实现方式中的任一项，在第一方面的第五种可能的实现方式中，所述终端为发送端，所述其它终端为接收端；
所述终端通过所述子帧实现与其它终端之间的通信，包括：
所述发送端获取用于承载数据的子帧；
所述发送端通过所述子帧向所述接收端发送数据和DMRS，所述DMRS用于所述接收端通过所述子帧中的DMRS解调所述子帧，获取承载在所述子帧中的数据。
结合第一方面或第一方面的第一种至第四种可能的实现方式中的任一项，在第一方面的第六种可能的实现方式中，所述终端为接收端，所述其它终端为发送端；
所述终端通过所述子帧实现与其它终端之间的通信，包括：
所述接收端接收发送端发送的承载数据的子帧；
所述接收端通过所述子帧中的DMRS解调所述子帧，以获取承载在所述子帧中的数据。
第二方面，本发明实施例提供一种终端，包括：
确定模块，用于确定用于通信的子帧的帧结构；
通信模块，用于通过所述子帧实现与其它终端之间的通信；
其中，所述子帧中用于传输解调参考信号DMRS的正交频分复用OFDM符号的个数至少为3个，所述用于传输DMRS的OFDM符号在所述子帧中间隔分布。
结合第二方面，在第二方面的第一种可能的实现方式中，所述子帧中用于传输DMRS的OFDM符号的个数至少为3个，所述传输DMRS的OFDM符号在所述子帧中间隔分布，具体为：
所述子帧中用于传输DMRS的相邻的两个OFDM符号之间，用于传输数据的OFDM符号的个数最多为4个；
所述子帧中用于传输第一个DMRS的OFDM符号的位置之前，OFDM符号的个数最多为4个，最少为1个；
所述子帧中用于传输最后一个DMRS的OFDM符号的位置之后，OFDM符号的个数最多为4个，最少为1个。
结合第二方面或第二方面的第一种可能的实现方式，在第二方面的第二种可能的实现方式中，所述子帧中用于传输DMRS的任意两个相邻的OFDM符号之间，用于传输数据的OFDM符号的个数相同。
结合第二方面的第二种可能的实现方式，在第二方面的第三种可能的实现方式中，所述子帧中包括14个OFDM符号，所述子帧中用于传输DMRS的任意两个相邻的OFDM符号之间，用于传输数据的OFDM符号的个数为3个或4个；或者，
所述子帧中包括12个OFDM符号，所述子帧中用于传输DMRS的任 意两个相邻的OFDM符号之间，用于传输数据的OFDM符号的个数为2个或3个。
结合第二方面或第二方面的第一种可能的实现方式，在第二方面的第四种可能的实现方式中，所述子帧中包括14个OFDM符号，所述子帧中用于传输DMRS的OFDM符号为第4个OFDM符号、第7个OFDM符号和第11个OFDM符号；或者，所述子帧中用于传输DMRS的OFDM符号为第4个OFDM符号、第8个OFDM符号和第11个OFDM符号。
结合第二方面或第二方面的第一种至第四种可能的实现方式中的任一项，在第二方面的第五种可能的实现方式中，所述终端为发送端，所述其它终端为接收端；所述通信模块包括：
第一获取单元，用于获取用于承载数据的子帧；
发送单元，用于通过所述子帧向所述接收端发送数据和DMRS，所述DMRS用于所述接收端通过所述子帧中的DMRS解调所述子帧，获取承载在所述子帧中的数据。
结合第二方面或第二方面的第一种至第四种可能的实现方式中的任一项，在第二方面的第六种可能的实现方式中，所述终端为接收端，所述其它终端为发送端；所述通信模块包括：
接收单元，用于接收发送端发送的承载数据的子帧；
第二获取单元，用于通过所述子帧中的DMRS解调所述子帧，以获取承载在所述子帧中的数据。
本发明实施例的终端到终端数据传输方法及设备，终端获取用于发送数据的子帧；终端通过子帧发送数据；子帧中用于传输解调参考信号DMRS的正交频分复用OFDM符号的个数至少为3个且间隔分布，增加了子帧中用于传输DMRS的OFDM符号的密度，使得当信道发生快速变化时，接收端根据该至少3个DMRS，可以对该子帧中的数据进行准确的解调，以准确地获取发送端发送的数据，进而提高了D2D通信中数据传输的可靠性。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实 施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1为D2D通信场景示意图；
图2为本发明实施例的终端到终端数据传输方法的流程图；
图3为本发明实施例的正常CP子帧的结构示意图一；
图4a为本发明实施例的正常CP子帧的结构示意图二；
图4b为本发明实施例的正常CP子帧的结构示意图三；
图5为本发明实施例的扩展CP子帧的结构示意图一；
图6a为本发明实施例的正常CP子帧的结构示意图四；
图6b为本发明实施例的正常CP子帧的结构示意图五；
图6c为本发明实施例的正常CP子帧的结构示意图六；
图6d为本发明实施例的正常CP子帧的结构示意图七；
图7a为本发明实施例的正常CP子帧的结构示意图八；
图7b为本发明实施例的正常CP子帧的结构示意图九；
图8a为本发明实施例的扩展CP子帧的结构示意图二；
图8b为本发明实施例的扩展CP子帧的结构示意图三；
图9a为本发明实施例的扩展CP子帧的结构示意图四；
图9b为本发明实施例的扩展CP子帧的结构示意图五；
图10为本发明实施例的终端的结构示意图一；
图11为本发明实施例的终端的结构示意图二；
图12为本发明实施例的终端的结构示意图三；
图13为本发明提供的终端的结构示意图四。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
图2为本发明实施例的终端到终端数据传输方法的流程图，请参照图2， 本实施例的终端到终端数据传输方法，包括：
S201、终端确定用于通信的子帧的帧结构；
S202、终端通过子帧实现与其它终端之间的通信。
其中，子帧中用于传输DMRS的OFDM符号的个数至少为3个，用于传输DMRS的OFDM符号在子帧中间隔分布。
在本实例中，终端可以为发送端，也可以为接收端，在终端和其他终端进行通信之前，该终端和其他终端已经确定用于通信的子帧的结构，该终端和其他终端通过该子帧实现通信；可选的，终端可以根据协议或者预设通信准则来确定用于通信的子帧的帧结构，当然，终端还可以通过其他方式确定用于通信的子帧的帧结构，本发明对此不做限定。
下面，分别对终端为发送端或者接收端时，S202的具体过程进行详细说明。
当终端为发送端，其他终端为接收端时，发送端获取用于承载数据的子帧；发送端通过该子帧向接收端发送数据和DMRS，以使接收端通过子帧中的DMRS解调子帧，获取承载在所述子帧中的数据。
在发送端向接收端发送数据之前，需要获取用于发送数据的资源，可选地，发送端可以通过如下可能的实现方式获取用于发送数据的资源。
一种可能的实现方式，发送端向基站发送用于申请资源的状态信息，由基站根据发送端的状态信息为其分配用于发送数据的资源。
另一种可能的实现方式，基站广播发送端可用的资源池，发送端通过竞争的方式获取用于发送数据的资源。
当终端为接收端，其它终端为发送端时，接收端接收发送端发送的承载数据的子帧；接收端通过子帧中的DMRS解调子帧，以获取承载在子帧中的数据。
在上述实施例中，用于通信的子帧中，用于传输DMRS的OFDM符号的个数至少为3个且间隔分布，例如，扩展CP子帧中的14个OFDM符合中，用于传输DMRS的OFDM符号的个数为3个或4个或5个或6个等，用于传输DMRS的OFDM符号之间为用于传输数据的OFDM符号，增加了用于传输DMRS的OFDM符号的密度，减少了用于传输DMRS的OFDM符号与用于传输数据的OFDM符号之间的距离，当信道发生快速 变化时，由于传输子帧中距离较近的OFDM符号的信道特性相似，从而使得接收端在对子帧进行解调过程中，能够准确获取发送端发送的数据。
本发明实施例提供的终端到终端数据传输方法，终端确定用于通信的子帧的帧结构，通过子帧实现与其它终端之间的通信，该子帧中用于传输DMRS的OFDM符号的个数至少为3个，用于传输DMRS的OFDM符号在子帧中且间隔分布，增加了子帧中用于传输DMRS的OFDM符号的密度，当信道发生快速变化时，接收端根据该至少3个DMRS可以对该子帧中的数据进行准确的解调，以准确地获取发送端发送的数据，进而提高了D2D通信中数据传输的可靠性。
在优选的实施例中，该子帧中用于传输DMRS的OFDM符号的个数为3个，用于传输DMRS的OFDM符号在子帧中间隔分布，相对于2个OFDM符号用于传输DMRS的情况，每个子帧中3个符号用于传输DMRS的实施例在时域上增加了导频密度，使得用于传输数据的OFDM符号离邻近的导频更近，导频符号和数据符号上的信道随时间变化更小，因此信道估计更准确。如果采用4个或者更多的OFDM符号用于传输DMRS，虽然能更进一步的提高信道估计精度，但是用于传输数据的OFDM符号相应的减少，导致系统的传输效率降低。
在图2所示的实施例中，进一步的，子帧中用于传输DMRS的OFDM符号在子帧中的位置需要同时满足以下条件：子帧中用于传输DMRS的相邻的两个OFDM符号之间，用于传输数据的OFDM符号的个数最多为4个；子帧中用于传输第一个DMRS的OFDM符号的位置之前，OFDM符号的个数最多为4个，最少为1个；子帧中用于传输最后一个DMRS的OFDM符号的位置之后，OFDM符号的个数最多为4个，最少为1个。
示例性的，图3为本发明实施例的正常CP子帧的结构示意图一，请参照图3，该子帧中用于传输DMRS的OFDM符号的个数为3个，第一个OFDM符号(图3中所示的0)用于自动增益调节，第2、4、6、7、8、9、11、12、13个OFDM符号用于传输数据，第3、5、10个符号用于传输DMRS，第14个OFDM符号(图3中所示的13)用于保护间隔。
在该子帧中，第3个OFDM符号和第5个OFDM符号之间用于传输数据的OFDM符号的个数为1个，第4个OFDM符号和第10个OFDM符 号之间用于传输数据的OFDM符号的个数为4个；第3个OFDM符号(传输第一个DMRS的OFDM符号)的位置之前，OFDM符号的个数为2个；第10个OFDM符号(传输最后一个DMRS的OFDM符号)的位置之后，OFDM符号的个数为4个。
本发明技术人员可以理解的是，在图3所示的正常CP子帧中，还可以是第3、6、10个OFDM符号用于传输DMRS，只要子帧中用于传输DMRS的OFDM符号的个数至少为3个，且在子帧中的位置需要同时满足上述条件即可。
在保证D2D通信中数据传输的可靠性的前提下，为了增加子帧中用于传输数据的OFDM符号所占的比例，优选地，子帧中包括3个用于传输DMRS的OFDM符号；进一步的，为了使得子帧中用于传输DMRS的OFDM符号在子帧中的分布更加均匀，下面对子帧中用于传输DMRS的OFDM符号的位置进行详细说明；具体的，用于传输DMRS的OFDM符号在子帧中的位置可以包括以下情况：
一种可能的情况：正常CP子帧中，用于传输DMRS的OFDM符号至少包括第4个OFDM符号和第11个OFDM符号；扩展CP子帧中，用于传输DMRS的OFDM符号至少包括第3个OFDM符号和第9个OFDM符号，下面分别对该种情况下，正常CP子帧和扩展CP子帧中用于传输DMRS的OFDM符号的位置进行详细说明。
对于正常CP的子帧：
图4a-图4b为本发明实施例的正常CP子帧的结构示意图，请参照图4a-图4b，该正常CP子帧中用于传输DMRS的OFDM符号至少包括第4个OFDM符号和第11个OFDM符号。
图4a为本发明实施例的正常CP子帧的结构示意图二；请参照图4a，该正常CP子帧中用于传输DMRS的OFDM符号为第4个OFDM符号、第7个OFDM符号和第11个OFDM符号。
图4b为本发明实施例的正常CP子帧的结构示意图三；请参照图4b，该正常CP子帧中用于传输DMRS的OFDM符号为第4个OFDM符号、第8个OFDM符号和第11个OFDM符号。
本领域技术人员可以理解的是，在图4a和图4b所示的子帧中，用于 传输DMRS的OFDM符号包括第4个OFDM符号和第11个OFDM符号的基础上，还可以通过子帧中第6个或第9个OFDM符号传输DMRS。
对于扩展CP的子帧：
图5为本发明实施例的扩展CP子帧的结构示意图一；请参照图5，扩展CP子帧中，用于传输DMRS的OFDM符号至少包括第3个OFDM符号和第9个OFDM符号；该扩展CP子帧中用于传输DMRS的OFDM符号为第3个OFDM符号、第6个OFDM符号和第9个OFDM符号。
本领域技术人员可以理解的是，在图5所示的子帧中，用于传输DMRS的OFDM符号包括第3个OFDM符号和第9个OFDM符号的基础上，还可以通过子帧中的第5个或第7个OFDM符号传输DMRS。
在该种情况下，通过对现有的性能较差的正常CP子帧或扩展CP子帧进行较小的改动，即可获得本发明实施例中性能较好的正常CP子帧或扩展CP子帧，进而提高获得本发明实施例中的正常CP子帧或扩展CP子帧的效率。
另一种可能的情况，子帧中用于传输DMRS的任意两个相邻的OFDM符号之间，用于传输数据的OFDM符号的个数相同。下面分别对该种情况下，正常CP子帧和扩展CP子帧中用于传输DMRS的OFDM符号的位置进行详细说明。
对于正常CP的子帧：
正常CP子帧中用于传输DMRS的任意两个相邻的OFDM符号之间，用于传输数据的OFDM符号的个数为3个或4个。
图6a-图6d为本发明实施例的正常CP子帧的结构示意图，请参照图6a-图6d，该正常CP子帧中，任意两个相邻的用于传输DMRS的OFDM符号之间，用于传输数据的OFDM符号的个数为3个。
图6a为本发明实施例的正常CP子帧的结构示意图四，请参照图6a，该正常CP子帧中用于传输DMRS的OFDM符号为第2个OFDM符号、第6个OFDM符号和第10个OFDM符号。
图6b为本发明实施例的正常CP子帧的结构示意图五，请参照图6b，该正常CP子帧中用于传输DMRS的OFDM符号为第3个OFDM符号、第7个OFDM符号和第11个OFDM符号。
图6c为本发明实施例的正常CP子帧的结构示意图六，请参照图6c，该正常CP子帧中用于传输DMRS的OFDM符号为第4个OFDM符号、第8个OFDM符号和第12个OFDM符号。
图6d为本发明实施例的正常CP子帧的结构示意图七，请参照图6d，该正常CP子帧中用于传输DMRS的OFDM符号为第5个OFDM符号、第9个OFDM符号和第13个OFDM符号。
图7a-图7b为本发明实施例的正常CP子帧的结构示意图，请参照图7a-图7b，该正常CP子帧中，任意两个相邻的用于传输DMRS的OFDM符号之间，用于传输数据的OFDM符号的个数为4个。
图7a为本发明实施例的正常CP子帧的结构示意图八，请参照图7a，该正常CP子帧中用于传输DMRS的OFDM符号为第2个OFDM符号、第7个OFDM符号和第12个OFDM符号。
图7b为本发明实施例的正常CP子帧的结构示意图九，请参照图7b，该正常CP子帧中用于传输DMRS的OFDM符号为第3个OFDM符号、第8个OFDM符号和第13个OFDM符号。
对于扩展CP的子帧：
扩展CP子帧中用于传输DMRS的任意两个相邻的OFDM符号之间，用于传输数据的OFDM符号的个数为2个或3个。
图8a-图8b为本发明实施例的扩展CP子帧的结构示意图，请参照图8a-图8b，该扩展CP子帧中，任意两个相邻的用于传输DMRS的OFDM符号之间，用于传输数据的OFDM符号的个数为2个。
图8a为本发明实施例的扩展CP子帧的结构示意图二，请参照图8a，该扩展CP子帧中用于传输DMRS的OFDM符号为第2个OFDM符号、第5个OFDM符号和第8个OFDM符号。
图8b为本发明实施例的扩展CP子帧的结构示意图三，请参照图8b，该扩展CP子帧中用于传输DMRS的OFDM符号为第4个OFDM符号、第7个OFDM符号和第10个OFDM符号。
需要说明的是，图5所示的子帧中，任意两个相邻的用于传输DMRS的OFDM符号之间，用于传输数据的OFDM符号的个数相同，且也为2个，此处不再进行赘述。
图9a-图9b为本发明实施例的扩展CP子帧的结构示意图，请参照图9a-图9b，该扩展CP子帧中，任意两个相邻的用于传输DMRS的OFDM符号之间，用于传输数据的OFDM符号的个数为3个。
图9a为本发明实施例的扩展CP子帧的结构示意图四，请参照图9a，该扩展CP子帧中用于传输DMRS的OFDM符号为第2个OFDM符号、第6个OFDM符号和第10个OFDM符号。
图9b为本发明实施例的扩展CP子帧的结构示意图五，请参照图9b，该扩展CP子帧中用于传输DMRS的OFDM符号为第3个OFDM符号、第8个OFDM符号和第11个OFDM符号。
在该种情况下，子帧中用于传输DMRS的任意两个相邻的OFDM符号之间，用于传输数据的OFDM符号的个数相同，使得子帧中用于传输DMRS的任意两个相邻的OFDM符号在子帧中均匀分布，接收端根据该3个均匀分布的DMRS，可以更为准确的对子帧中的数据进行解调。
图10为本发明实施例的终端的结构示意图一，请参照图10，该终端可以包括：
确定模块1001，用于确定用于通信的子帧的帧结构；
通信模块1002，用于通过子帧实现与其它终端之间的通信；
其中，子帧中用于传输解调参考信号DMRS的正交频分复用OFDM符号的个数至少为3个，用于传输DMRS的OFDM符号在子帧中间隔分布。
图11为本发明实施例的终端的结构示意图二，在图10所示的实施例的基础上，请参照图11，当终端为发送端，其它终端为接收端时，通信模块1002包括：
第一获取单元10021，用于获取用于承载数据的子帧；
发送单元10022，用于通过子帧向接收端发送数据和DMRS，以使接收端通过子帧中的DMRS解调子帧，获取承载在子帧中的数据。
图12为本发明实施例的终端的结构示意图三，在图10所示的实施例的基础上，请参照图12，当终端为接收端，其它终端为发送端时，通信模块1002包括：
接收单元10023，用于接收发送端发送的承载数据的子帧；
第二获取单元10024，用于通过子帧中的DMRS解调子帧，以获取承载在子帧中的数据。
在上述实施例中，子帧中用于传输DMRS的OFDM符号的个数至少为3个，传输DMRS的OFDM符号在子帧中间隔分布，具体为：
子帧中用于传输DMRS的相邻的两个OFDM符号之间，用于传输数据的OFDM符号的个数最多为4个；
子帧中用于传输第一个DMRS的OFDM符号的位置之前，OFDM符号的个数最多为4个，最少为1个；
子帧中用于传输最后一个DMRS的OFDM符号的位置之后，OFDM符号的个数最多为4个，最少为1个。
用于传输DMRS的OFDM符号在子帧中的位置可以包括以下情况：
一种可行的情况：子帧中用于传输DMRS的任意两个相邻的OFDM符号之间，用于传输数据的OFDM符号的个数相同。
具体的，子帧中包括14个OFDM符号，子帧中用于传输DMRS的任意两个相邻的OFDM符号之间，用于传输数据的OFDM符号的个数为3个或4个；或者，
子帧中包括12个OFDM符号，子帧中用于传输DMRS的任意两个相邻的OFDM符号之间，用于传输数据的OFDM符号的个数为2个或3个。
另一种可行的情况：子帧中包括14个OFDM符号，子帧中用于传输DMRS的OFDM符号为第4个OFDM符号、第7个OFDM符号和第11个OFDM符号；或者，子帧中用于传输DMRS的OFDM符号为第4个OFDM符号、第8个OFDM符号和第11个OFDM符号。
本实施例的终端，可以用于执行上述方法实施例的技术方案，其实现原理和技术效果类似，此处不再赘述。
图13为本发明提供的终端的结构示意图四。请参照图13，该终端可以包括：处理器1301，例如CPU；存储器1302，至少一个通信总线1303，发射器1304和接收器1305。通信总线1303用于实现元件之间的通信连接。存储器1302可能包含高速RAM存储器，也可能还包括非易失性存储器NVM，例如至少一个磁盘存储器，存储器1302中可以存储各种程序，处理器1301可以调用存储器1302中的各种程序，用于完成各种处理功能以 及实现本实施例的方法步骤。
其中，处理器1301，用于确定用于通信的子帧的帧结构；
发射器1304和接收器1305，用于通过子帧实现与其它终端之间的通信；
其中，子帧中用于传输解调参考信号DMRS的正交频分复用OFDM符号的个数至少为3个，用于传输DMRS的OFDM符号在子帧中间隔分布。
当终端为发送端，其它终端为接收端时，
处理器1301具体用于获取用于承载数据的子帧；
发射器1304具体用于通过子帧向接收端发送数据和DMRS，以使接收端通过子帧中的DMRS解调子帧，获取承载在子帧中的数据。
当终端为接收端，其它终端为发送端时，
接收器1305具体用于接收发送端发送的承载数据的子帧；
处理器1301具体用于通过子帧中的DMRS解调子帧，以获取承载在子帧中的数据。
在上述实施例中，子帧中用于传输DMRS的OFDM符号的个数至少为3个，传输DMRS的OFDM符号在子帧中间隔分布，具体为：
子帧中用于传输DMRS的相邻的两个OFDM符号之间，用于传输数据的OFDM符号的个数最多为4个；
子帧中用于传输第一个DMRS的OFDM符号的位置之前，OFDM符号的个数最多为4个，最少为1个；
子帧中用于传输最后一个DMRS的OFDM符号的位置之后，OFDM符号的个数最多为4个，最少为1个。
用于传输DMRS的OFDM符号在子帧中的位置可以包括以下情况：
一种可行的情况：子帧中用于传输DMRS的任意两个相邻的OFDM符号之间，用于传输数据的OFDM符号的个数相同。
具体的，子帧中包括14个OFDM符号，子帧中用于传输DMRS的任意两个相邻的OFDM符号之间，用于传输数据的OFDM符号的个数为3个或4个；或者，
子帧中包括12个OFDM符号，子帧中用于传输DMRS的任意两个相邻的OFDM符号之间，用于传输数据的OFDM符号的个数为2个或3个。
另一种可行的情况：子帧中包括14个OFDM符号，子帧中用于传输DMRS的OFDM符号为第4个OFDM符号、第7个OFDM符号和第11个OFDM符号；或者，子帧中用于传输DMRS的OFDM符号为第4个OFDM符号、第8个OFDM符号和第11个OFDM符号。
本实施例的终端，可以用于执行上述方法实施例的技术方案，其实现原理和技术效果类似，此处不再赘述。
本领域普通技术人员可以理解：实现上述方法实施例的全部或部分步骤可以通过程序指令相关的硬件来完成，前述的程序可以存储于一计算机可读取存储介质中，该程序在执行时，执行包括上述方法实施例的步骤；而前述的存储介质包括：ROM、RAM、磁碟或者光盘等各种可以存储程序代码的介质。
最后应说明的是：以上各实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述各实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例技术方案的范围。

Claims (14)

  1. 一种终端到终端数据传输方法，其特征在于，包括：
    终端确定用于通信的子帧的帧结构；
    所述终端通过所述子帧实现与其它终端之间的通信；
    其中，所述子帧中用于传输解调参考信号DMRS的正交频分复用OFDM符号的个数至少为3个，所述用于传输DMRS的OFDM符号在所述子帧中间隔分布。
  2. 根据权利要求1所述的方法，其特征在于，所述子帧中用于传输DMRS的OFDM符号的个数至少为3个，所述传输DMRS的OFDM符号在所述子帧中间隔分布，具体为：
    所述子帧中用于传输DMRS的相邻的两个OFDM符号之间，用于传输数据的OFDM符号的个数最多为4个；
    所述子帧中用于传输第一个DMRS的OFDM符号的位置之前，OFDM符号的个数最多为4个，最少为1个；
    所述子帧中用于传输最后一个DMRS的OFDM符号的位置之后，OFDM符号的个数最多为4个，最少为1个。
  3. 根据权利要求1或2所述的方法，其特征在于，所述子帧中用于传输DMRS的任意两个相邻的OFDM符号之间，用于传输数据的OFDM符号的个数相同。
  4. 根据权利要求3所述的方法，其特征在于，所述子帧中包括14个OFDM符号，所述子帧中用于传输DMRS的任意两个相邻的OFDM符号之间，用于传输数据的OFDM符号的个数为3个或4个；或者，
    所述子帧中包括12个OFDM符号，所述子帧中用于传输DMRS的任意两个相邻的OFDM符号之间，用于传输数据的OFDM符号的个数为2个或3个。
  5. 根据权利要求1或2所述的方法，其特征在于，所述子帧中包括14个OFDM符号，所述子帧中用于传输DMRS的OFDM符号为第4个OFDM符号、第7个OFDM符号和第11个OFDM符号；或者，所述子帧中用于传输DMRS的OFDM符号为第4个OFDM符号、第8个OFDM符号和第11个OFDM符号。
  6. 根据权利要求1-5任一项所述的方法，其特征在于，所述终端为发送端，所述其它终端为接收端；
    所述终端通过所述子帧实现与其它终端之间的通信，包括：
    所述发送端获取用于承载数据的子帧；
    所述发送端通过所述子帧向所述接收端发送数据和DMRS，所述DMRS用于所述接收端通过所述子帧中的DMRS解调所述子帧，获取承载在所述子帧中的数据。
  7. 根据权利要求1-5任一项所述的方法，其特征在于，所述终端为接收端，所述其它终端为发送端；
    所述终端通过所述子帧实现与其它终端之间的通信，包括：
    所述接收端接收发送端发送的承载数据的子帧；
    所述接收端通过所述子帧中的DMRS解调所述子帧，以获取承载在所述子帧中的数据。
  8. 一种终端，其特征在于，包括：
    确定模块，用于确定用于通信的子帧的帧结构；
    通信模块，用于通过所述子帧实现与其它终端之间的通信；
    其中，所述子帧中用于传输解调参考信号DMRS的正交频分复用OFDM符号的个数至少为3个，所述用于传输DMRS的OFDM符号在所述子帧中间隔分布。
  9. 根据权利要求8所述的终端，其特征在于，所述子帧中用于传输DMRS的OFDM符号的个数至少为3个，所述传输DMRS的OFDM符号在所述子帧中间隔分布，具体为：
    所述子帧中用于传输DMRS的相邻的两个OFDM符号之间，用于传输数据的OFDM符号的个数最多为4个；
    所述子帧中用于传输第一个DMRS的OFDM符号的位置之前，OFDM符号的个数最多为4个，最少为1个；
    所述子帧中用于传输最后一个DMRS的OFDM符号的位置之后，OFDM符号的个数最多为4个，最少为1个。
  10. 根据权利要求8或9所述的终端，其特征在于，所述子帧中用于传输DMRS的任意两个相邻的OFDM符号之间，用于传输数据的OFDM符号 的个数相同。
  11. 根据权利要求10所述的终端，其特征在于，所述子帧中包括14个OFDM符号，所述子帧中用于传输DMRS的任意两个相邻的OFDM符号之间，用于传输数据的OFDM符号的个数为3个或4个；或者，
    所述子帧中包括12个OFDM符号，所述子帧中用于传输DMRS的任意两个相邻的OFDM符号之间，用于传输数据的OFDM符号的个数为2个或3个。
  12. 根据权利要求8或9所述的终端，其特征在于，所述子帧中包括14个OFDM符号，所述子帧中用于传输DMRS的OFDM符号为第4个OFDM符号、第7个OFDM符号和第11个OFDM符号；或者，所述子帧中用于传输DMRS的OFDM符号为第4个OFDM符号、第8个OFDM符号和第11个OFDM符号。
  13. 根据权利要求8-12任一项所述的终端，其特征在于，所述终端为发送端，所述其它终端为接收端；所述通信模块包括：
    第一获取单元，用于获取用于承载数据的子帧；
    发送单元，用于通过所述子帧向所述接收端发送数据和DMRS，所述DMRS用于所述接收端通过所述子帧中的DMRS解调所述子帧，获取承载在所述子帧中的数据。
  14. 根据权利要求8-12任一项所述的终端，其特征在于，所述终端为接收端，所述其它终端为发送端；所述通信模块包括：
    接收单元，用于接收发送端发送的承载数据的子帧；
    第二获取单元，用于通过所述子帧中的DMRS解调所述子帧，以获取承载在所述子帧中的数据。
PCT/CN2015/084235 2015-07-16 2015-07-16 终端到终端数据传输方法及设备 Ceased WO2017008305A1 (zh)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130150058A1 (en) * 2011-12-07 2013-06-13 Electronics & Telecommunications Research Institute Method of controlling communication resources for cellular mobile communication system-based device-to-device communication
CN103716273A (zh) * 2012-09-29 2014-04-09 华为技术有限公司 D2d通信方法及设备
CN104396173A (zh) * 2012-06-22 2015-03-04 Lg电子株式会社 用于设备对设备通信的调度方法及其装置
CN104780620A (zh) * 2014-01-10 2015-07-15 夏普株式会社 用户设备间通信的控制信令发送和接收方法以及设备

Family Cites Families (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6804223B2 (en) * 2000-11-30 2004-10-12 Ipr Licensing, Inc. Reverse link pilot integrated with block codes
US9288026B2 (en) * 2009-06-22 2016-03-15 Qualcomm Incorporated Transmission of reference signal on non-contiguous clusters of resources
CN101621492A (zh) * 2009-08-14 2010-01-06 中兴通讯股份有限公司 一种专用解调数据参考信号的资源确定方法
CN102076076B (zh) * 2009-11-20 2015-11-25 夏普株式会社 一种解调参考信号的资源分配通知方法
CN102859900B (zh) * 2010-04-22 2016-02-03 Lg电子株式会社 用于基站与中继站之间的无线链路的信道估计的方法和设备
JP5829987B2 (ja) * 2012-07-23 2015-12-09 株式会社Ｎｔｔドコモ 無線通信方法、無線通信システム及び無線基地局
WO2014185674A1 (ko) * 2013-05-11 2014-11-20 엘지전자 주식회사 캐리어 타입을 고려한 통신 방법 및 이를 위한 장치
US9661657B2 (en) * 2013-11-27 2017-05-23 Intel Corporation TCP traffic adaptation in wireless systems
US9730174B2 (en) * 2014-02-27 2017-08-08 Lg Electronics Inc. Method of transmitting a scheduling assignment signal for device-to-device communication in a wireless communication system, and an apparatus thereof
US9893857B2 (en) * 2014-03-21 2018-02-13 Samsung Electronics Co., Ltd. Method and apparatus for transmitting and receiving reference signal in device-to-device communication
CN106664136B (zh) * 2014-06-27 2020-07-28 苹果公司 用于具有窄带部署的MTC的UE和eNB的方法和装置
US10080142B2 (en) * 2015-03-26 2018-09-18 Qualcomm Incorporated Null tone transmission in an unlicensed or shared spectrum
WO2016163623A1 (ko) * 2015-04-08 2016-10-13 엘지전자(주) 무선 통신 시스템에서 데이터를 송수신하기 위한 방법 및 이를 위한 장치
US10085158B2 (en) * 2015-05-14 2018-09-25 Sharp Laboratories Of America, Inc. User equipments, base stations and methods
EP3297363B1 (en) * 2015-05-15 2023-04-19 Sharp Kabushiki Kaisha Terminal device, base station device, and communication method
WO2016204590A1 (ko) * 2015-06-18 2016-12-22 엘지전자 주식회사 무선 통신 시스템에서 v2v 통신을 위한 참조 신호 설정 방법 및 이를 위한 장치
US10491354B2 (en) * 2015-06-23 2019-11-26 Electronics And Telecommunications Research Institute Method and apparatus for transmitting data in direct device-to-device communication
WO2017008210A1 (zh) * 2015-07-10 2017-01-19 富士通株式会社 解调参考信号的传输方法、装置和系统
US10595325B2 (en) * 2015-07-24 2020-03-17 Lg Electronics Inc. Method for transmitting and receiving terminal grouping information in non-orthogonal multiple access scheme
US10420083B2 (en) * 2015-07-30 2019-09-17 Intel IP Corporation OFDMA-based multiplexing of uplink control information
EP3335352A1 (en) * 2015-08-12 2018-06-20 Intel Corporation Demodulation in wireless communications
WO2017029036A1 (en) * 2015-08-19 2017-02-23 Sony Corporation Mobile communications devices and methods
WO2017031625A1 (zh) * 2015-08-21 2017-03-02 富士通株式会社 解调参考信号的传输方法、装置以及通信系统

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130150058A1 (en) * 2011-12-07 2013-06-13 Electronics & Telecommunications Research Institute Method of controlling communication resources for cellular mobile communication system-based device-to-device communication
CN104396173A (zh) * 2012-06-22 2015-03-04 Lg电子株式会社 用于设备对设备通信的调度方法及其装置
CN103716273A (zh) * 2012-09-29 2014-04-09 华为技术有限公司 D2d通信方法及设备
CN104780620A (zh) * 2014-01-10 2015-07-15 夏普株式会社 用户设备间通信的控制信令发送和接收方法以及设备

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US20180123756A1 (en) 2018-05-03
CN107005375A (zh) 2017-08-01
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