WO2015042789A1

WO2015042789A1 - Signal sending method, receiving method, apparatus and communication device

Info

Publication number: WO2015042789A1
Application number: PCT/CN2013/084151
Authority: WO
Inventors: 夏亮; 王键
Original assignee: 华为技术有限公司
Priority date: 2013-09-25
Filing date: 2013-09-25
Publication date: 2015-04-02
Also published as: CN104813600B; CN104813600A

Abstract

Disclosed are a signal sending method, a receiving method, an apparatus and a communication device used for device to device communication. The methods comprise: a first communication device determining a sending time of a first subframe and a subframe structure of the first subframe, wherein: the first subframe comprises a protection interval and the subframe structure of the first subframe comprises a length of the protection interval and a position of the protection interval in the first subframe, or the first subframe comprises a data signal and the subframe structure of the first subframe comprises a length of the data signal and a position of the data signal in the first subframe; and the first communication device sending the first subframe to a second communication device based on the subframe structure of the first subframe at the sending time of the first subframe. In such a manner, resources can be properly utilized without reducing system transmission efficiency, and an adaptive range is wide.

Description

Signal transmitting method, receiving method, device and communication device

[Technical Field]

The present invention relates to the field of mobile communication technologies, and in particular, to a method, a receiving method, a device, and a communication device for transmitting a device-to-device communication signal.

【Background technique】

Device to Device (D2D) communication refers to a communication method in which user equipment (UE) directly transmits information without passing through a base station. When D2D communication is performed, the UE is in a half-duplex state, that is, the transmission data and the reception data cannot be simultaneously performed, and the state in which the UE transitions from the state of transmitting data to the state of receiving data requires a conversion time, and the state from the state of receiving data to the state of transmitting data. The state also requires a conversion time.

When the D2D sends a signal, the UE needs to perform a transceiving conversion reserve protection interval, so that the transmitting UE has sufficient time to complete the transition from the receiving state to the transmitting state, and the receiving UE has sufficient time to complete the sending state to the receiving state. State transition. Prior Art: Two symbols are reserved at each end of a D2D communication subframe as guard intervals.

The prior art has a large overhead, wastes resources, and the system transmission efficiency is low.

[Summary of the Invention]

The technical problem to be solved by the present invention is to provide a method for transmitting a signal for device-to-device communication, a receiving method, a device and a communication device, which can utilize resources reasonably without reducing system transmission efficiency, and have wide adaptability. .

In a first aspect, the present invention provides a method for transmitting a signal of a device to a device, including: determining, by a first communications device, a sending moment of a first subframe and a subframe structure of the first subframe, where The first subframe includes a guard interval, and the subframe structure of the first subframe includes a length of the guard interval and a position of the guard interval in the first subframe, or the first sub-frame a frame includes a data signal, and a subframe structure of the first subframe includes a length of the data signal and the data signal is a location in the first subframe; the first communications device sends the first subframe to a second communications device according to a subframe structure of the first subframe at a sending moment of the first subframe .

In a first possible implementation manner of the first aspect, the subframe structure of the first subframe is dynamic, where the subframe structure of the first subframe is dynamic, and any adjacent two are The subframe structure of the first subframe may be different.

With reference to the first aspect or the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the subframe structure of the first subframe is a first subframe structure, The length of the guard interval in the first subframe structure is a symbol or M ₂ time units, and the position of the guard interval in the first subframe is the tail of the first subframe, where the positive number is The M ₂ is a positive integer; or the length of the data signal in the first subframe structure is ^1 ₃ symbols or M ₄ time units, and the position of the data signal in the first subframe a header of the first subframe, where the ^1 ₃ is a positive number, and the M ₄ is a positive integer.

With reference to the second possible implementation of the first aspect, in a third possible implementation manner of the first aspect, the determining, by the first communications device, the sending moment of the first subframe, The subframe structure of the frame is the first subframe structure, and the first communications device determines that the sending time of the first subframe is T1 time units after the reference time, where the T1 is a positive integer.

With reference to the first aspect or the first possible implementation manner of the first aspect, in a fourth possible implementation manner of the first aspect, the subframe structure of the first subframe is a second subframe structure, The length of the guard interval in the second subframe structure is a symbol or N ₂ time units, and the position of the guard interval in the first subframe is the head of the first subframe, where the Is a positive number, the N ₂ is a positive integer; or the length of the data signal in the second subframe structure is N ₃ symbols or N ₄ time units, and the data signal is in the first subframe The position is a tail of the first subframe, wherein the N ₃ is a positive number, and the N ₄ is a positive integer.

With the fourth possible implementation of the first aspect, in a fifth possible implementation manner of the first aspect, the determining, by the first communications device, the sending moment of the first subframe, includes: if the first sub The subframe structure of the frame is a second subframe structure, and the first communications device determines when the first subframe is sent. The engraving is T ₂ time units before the reference time, wherein the τ ₂ is a positive integer.

With reference to the first aspect, or the first possible implementation manner of the first aspect, in a sixth possible implementation manner of the first aspect, the subframe structure of the first subframe is a third subframe structure, The length of the guard interval in the third subframe structure is a symbol or Κ ₂ time units, and the position of the guard interval in the first subframe is the head and the tail of the first subframe, where Said is a positive number, the κ ₂ is a positive integer; or, the length of the data signal in the third subframe structure is ₃ symbols or κ ₄ time units, and the data signal is in the first subframe The position is the middle of the first subframe, wherein the κ ₃ is a positive number, and the κ ₄ is a positive integer.

With reference to the first aspect or the first possible implementation manner of the first aspect, in a seventh possible implementation manner of the first aspect, the subframe structure of the first subframe is a fourth subframe structure, The length of the guard interval in the fourth subframe structure is 0 symbols or 0 time units.

With reference to the sixth or the seventh possible implementation of the first aspect, in the eighth possible implementation manner of the foregoing aspect, the first communications device determines a sending moment of the first subframe, including: The subframe structure of the first subframe is a third subframe structure or a fourth subframe structure, and the first communications device determines that the sending moment of the first subframe is a reference time, or τ ₃ before the reference time. τ ₄ time units after the time unit, or after the reference time, wherein the D ₃ and D ₄ are positive integers.

In conjunction with the second or fourth or the sixth possible implementation of the first aspect, in a ninth possible implementation manner of the first aspect, the length of the guard interval is greater than or equal to a transceiving conversion time requirement and is less than The transceiving conversion time requirement is twice or more, or the length of the protection interval is greater than or equal to twice the transceiving conversion time requirement, wherein the transceiving conversion time requirement is a predefined value.

In conjunction with the second or fourth or sixth possible implementation of the first aspect, in a tenth possible implementation of the first aspect, the Μ ₂ or Ν ₂ or Κ _{2 is} greater than or equal to 624 and Less than 1248, or Μ ₂ or Ν ₂ or Κ _{2 is} greater than or equal to 1248.

With the possible implementation of any one of the first to the tenth aspects of the first aspect, in the eleventh possible implementation manner of the first aspect, the subframe structure of the first subframe further includes data A symbol, wherein the cyclic prefix of the data symbol is an extended cyclic prefix. With the possible implementation of any one of the first to the tenth aspects of the first aspect, in the twelfth possible implementation manner of the first aspect, the subframe structure of the first subframe further includes data a symbol, wherein a cyclic prefix of the first data symbol in the first subframe is an extended cyclic prefix.

With reference to the eleventh or twelfth possible implementation manner of the first aspect, in the thirteenth possible implementation manner of the first aspect, the extended cyclic prefix is that the length of the cyclic prefix is greater than The length of the cyclic prefix of the data symbol included in the subframe transmitted by the first communication device to the base station.

With the possible implementation of any one of the second to eleventh aspects of the first aspect, in the fourteenth possible implementation manner of the first aspect, the time unit is time sampling, and the symbol is positive Interleaved frequency division multiple access OFDMA symbols or single carrier frequency division multiple access SC-FDMA symbols.

With reference to the first aspect to the possible implementation of the fourteenth aspect of the first aspect, in a fifteenth possible implementation manner of the first aspect, the first communications device determines a sub-frame of the first subframe a frame structure, including: the first communications device receives a subframe configuration command sent by the base station; the first communications device determines, according to the subframe configuration instruction, a length of a guard interval in a subframe structure of the first subframe And determining, by the first communications device, a length of the data signal in the subframe structure of the first subframe according to the subframe configuration instruction, or a location of the guard interval in the first subframe, or Describe the location of the data signal in the first subframe.

With reference to the fifteenth possible implementation manner of the first aspect, in a sixteenth possible implementation manner of the first aspect, the determining, by the first communications device, the sending moment of the first subframe, The communication device determines a transmission moment of the first subframe according to the subframe configuration instruction.

With reference to the first aspect to the possible implementation of the fourteenth aspect of the first aspect, in a seventeenth possible implementation manner of the first aspect, the first communications device determines a sub-frame of the first subframe And the frame structure includes: determining, by the first communications device, the protection in the subframe structure of the first subframe according to the transmission mode of the first subframe and the state of the one subframe before the first subframe and/or after the first subframe a length of the interval and a position of the guard interval in the first subframe, or the first communication device according to a transmission mode of the first subframe and before the first subframe and/or after the first subframe The state of one subframe determines the length of the data signal in the subframe structure of the first subframe and the location of the data signal in the first subframe. With the seventeenth possible implementation manner of the first aspect, in the eighteenth possible implementation manner of the first aspect, the determining, by the first communications device, the sending moment of the first subframe, the first The communication device determines the transmission timing of the first subframe according to the transmission mode of the first subframe and the state of the one subframe before the first subframe and/or after the first subframe.

In a nineteenth possible implementation manner of the first aspect, the method further includes: the first communications device The second communication device sends a subframe configuration instruction of the first subframe.

In a second aspect, the present invention provides a method for receiving a signal for device-to-device communication, including: determining, by a second communications device, a subframe structure of a first subframe sent by a first communications device; The subframe structure of the first subframe receives the first subframe, where, if the second communications device identifies, according to the subframe structure, that the first subframe includes a guard interval, the guard interval is a signal that does not receive the location of the guard interval in the first subframe, or if the second communications device identifies that the first subframe includes a data signal according to the subframe structure And receiving a signal at a location of the data signal in the first subframe within a length of the data signal.

In a first possible implementation manner of the second aspect, the subframe structure of the first subframe is dynamic, where the subframe structure of the first subframe is dynamic, and any adjacent two are The subframe structure of the first subframe may be different.

With reference to the second aspect, or the first possible implementation manner of the second aspect, in a second possible implementation manner of the second aspect, the subframe structure of the first subframe is a first subframe structure, The length of the guard interval in the first subframe structure is a symbol or M ₂ time units, and the position of the guard interval in the first subframe is the tail of the first subframe, where the positive number is The ^1 ₂ is a positive integer; or, the length of the data signal in the first subframe structure is M ₃ symbols or M ₄ time units, and the position of the data signal in the first subframe a header of the first subframe, where the M ₃ is a positive number, and the M ₄ is a positive integer.

In combination with the second aspect or the first possible implementation of the second aspect, the third aspect of the second aspect In a possible implementation, the subframe structure of the first subframe is a second subframe structure, and the length of the guard interval in the second subframe structure is a symbol or N ₂ time units, and the guard interval is The position in the first subframe is a header of the first subframe, where the ^ is a positive number, the N ₂ is a positive integer; or the length of the data signal in the second subframe structure Is N ₃ symbols or N ₄ time units, the position of the data signal in the first subframe is the tail of the first subframe, wherein the N ₃ is a positive number, and the N ₄ is positive Integer.

With reference to the second aspect, or the first possible implementation manner of the second aspect, in a fourth possible implementation manner of the second aspect, the subframe structure of the first subframe is a third subframe structure, The length of the guard interval in the third subframe structure is a symbol or K ₂ time units, and the position of the guard interval in the first subframe is the head and the tail of the first subframe, where Said is a positive number, said Κ ₂ is a positive integer; or, the length of the data signal in the third subframe structure is Κ ₃ symbols or time units, and the data signal is in the first subframe The location is a middle portion of the first subframe, wherein the Κ ₃ is a positive number, and the is a positive integer.

With reference to the second aspect, or the first possible implementation manner of the second aspect, in a fifth possible implementation manner of the second aspect, the subframe structure of the first subframe is a fourth subframe structure, The length of the guard interval in the fourth subframe structure is 0 symbols or 0 time units.

In conjunction with the second or third or fourth possible implementation of the second aspect, in a sixth possible implementation manner of the second aspect, the length of the guard interval is greater than or equal to a transceiving conversion time requirement and is less than The transceiving conversion time requirement is twice or more, or the length of the protection interval is greater than or equal to twice the transceiving conversion time requirement, wherein the transceiving conversion time requirement is a predefined value.

In conjunction with the second or third or fourth possible implementation of the second aspect, in a seventh possible implementation of the second aspect, the Μ ₂ or Ν ₂ or Κ _{2 is} greater than or equal to 624 and Less than 1248, or Μ ₂ or Ν ₂ or Κ _{2 is} greater than or equal to 1248.

With reference to the second aspect, the possible implementation of the seventh aspect of the second aspect, in the eighth possible implementation manner of the second aspect, the subframe structure of the first subframe further includes a data symbol , wherein the cyclic prefix of the data symbol is an extended cyclic prefix. With reference to the second aspect, the possible implementation of the seventh aspect of the second aspect, in the ninth possible implementation manner of the second aspect, the subframe structure of the first subframe further includes a data symbol The cyclic prefix of the first data symbol in the first subframe is an extended cyclic prefix.

With reference to the eighth aspect of the second aspect, or the ninth possible implementation manner of the second aspect, in the tenth possible implementation manner of the second aspect, the extended cyclic prefix is that the length of the cyclic prefix is greater than The length of the cyclic prefix of the data symbol included in the subframe transmitted by the first communications device to the base station.

With reference to the possible implementation of any one of the second to seventh aspects of the second aspect, in the eleventh possible implementation manner of the second aspect, the time unit is time sampling, and the symbol is orthogonal Frequency division multiple access OFDMA symbols or single carrier frequency division multiple access SC-FDMA symbols.

With reference to the second aspect, the possible implementation of the eleventh aspect of the second aspect, in the twelfth possible implementation manner of the second aspect, the second communications device determines that the first communications device sends The subframe structure of the first subframe includes: the second communication device receives a subframe configuration instruction sent by the base station or the first communication device; and the second communication device determines the first according to the subframe configuration instruction a length of a guard interval in a subframe structure of a subframe and a position of the guard interval in the first subframe, or the second communications device determines the first subframe according to the subframe configuration instruction The length of the data signal in the subframe structure of the frame and the location of the data signal in the first subframe.

With reference to the second aspect, the possible implementation of the eleventh aspect of the second aspect, in the thirteenth possible implementation manner of the second aspect, And the frame structure includes: determining, by the second communications device, the protection in the subframe structure of the first subframe according to the transmission mode of the first subframe and the state of one subframe before the first subframe and/or after the first subframe a length of the interval and a position of the guard interval in the first subframe, or the second communication device according to a transmission mode of the first subframe and before the first subframe and/or after the first subframe The state of one subframe determines the length of the data signal in the subframe structure of the first subframe and the location of the data signal in the first subframe.

In a third aspect, the present invention provides a communication device, where the communication device includes: a determining module and a sending module; the determining module is configured to determine a sending moment of the first subframe and a subframe structure of the first subframe, where The first subframe includes a guard interval, and the subframe structure of the first subframe includes the protection The length of the guard interval and the position of the guard interval in the first subframe, or the first subframe includes a data signal, and the subframe structure of the first subframe includes the data signal a length and a position of the data signal in the first subframe; the sending module is configured to: according to the sending moment of the first subframe determined by the determining module, according to the subframe of the first subframe The structure transmits the first subframe to a second communication device.

In a first possible implementation manner of the third aspect, the subframe structure of the first subframe is dynamic, where the subframe structure of the first subframe is dynamic, and any adjacent two are The subframe structure of the first subframe may be different.

With the third aspect or the first possible implementation manner of the third aspect, in a second possible implementation manner of the third aspect, the subframe structure of the first subframe is a first subframe structure, The length of the guard interval in the first subframe structure is a symbol or M ₂ time units, and the position of the guard interval in the first subframe is the tail of the first subframe, where the positive number is The ^1 ₂ is a positive integer; or, the length of the data signal in the first subframe structure is M ₃ symbols or M ₄ time units, and the position of the data signal in the first subframe a header of the first subframe, where the M ₃ is a positive number, and the M ₄ is a positive integer.

With reference to the second possible implementation of the third aspect, in a third possible implementation manner of the third aspect, the determining module is specifically configured to: when the subframe structure of the first subframe is the first subframe In the structure, it is determined that the sending time of the first subframe is a time unit after the reference time, where the Τ is a positive integer.

With the third aspect or the first possible implementation manner of the third aspect, in a fourth possible implementation manner of the third aspect, the subframe structure of the first subframe is a second subframe structure, The length of the guard interval in the second subframe structure is a symbol or N ₂ time units, and the position of the guard interval in the first subframe is the head of the first subframe, where the Is a positive number, the N ₂ is a positive integer; or the length of the data signal in the second subframe structure is N ₃ symbols or N ₄ time units, and the data signal is in the first subframe The position is a tail of the first subframe, wherein the N ₃ is a positive number, and the N ₄ is a positive integer. With the fourth possible implementation of the third aspect, in a fifth possible implementation manner of the third aspect, the determining module is further configured to: when the subframe structure of the first subframe is a second subframe In the structure, it is determined that the transmission time of the first subframe is τ ₂ time units before the reference time, wherein the τ ₂ is a positive integer.

With the third aspect or the first possible implementation manner of the third aspect, in a sixth possible implementation manner of the third aspect, the subframe structure of the first subframe is a third subframe structure, The length of the guard interval in the third subframe structure is a symbol or Κ ₂ time units, and the position of the guard interval in the first subframe is the head and the tail of the first subframe, where Said is a positive number, the κ ₂ is a positive integer; or, the length of the data signal in the third subframe structure is κ ₃ symbols or time units, and the data signal is in the first subframe The position is a middle portion of the first subframe, wherein the Κ ₃ is a positive number, and the Κ ₄ is a positive integer.

With reference to the third aspect, or the first possible implementation manner of the third aspect, in a seventh possible implementation manner of the third aspect, the subframe structure of the first subframe is a fourth subframe structure, The length of the guard interval in the fourth subframe structure is 0 symbols or 0 time units.

With reference to the sixth or the seventh possible implementation of the third aspect, in an eighth possible implementation manner of the third aspect, the determining module is further configured to: In the third subframe structure or the fourth subframe structure, determining that the transmission time of the first subframe is a reference time, or τ ₃ time units before the reference time, or τ ₄ time units after the reference time, where The τ ₃ and τ ₄ are positive integers.

In conjunction with the second or third or fourth possible implementation of the third aspect, in a ninth possible implementation manner of the third aspect, the length of the guard interval is greater than or equal to a transceiving conversion time requirement and is less than The transceiving conversion time requirement is twice or more, or the length of the protection interval is greater than or equal to twice the transceiving conversion time requirement, wherein the transceiving conversion time requirement is a predefined value.

In conjunction with the second or third or fourth possible implementation of the third aspect, in a tenth possible implementation of the third aspect, the Μ ₂ or Ν ₂ or Κ _{2 is} greater than or equal to 624 and Less than 1248, or Μ ₂ or Ν ₂ or Κ _{2 is} greater than or equal to 1248. With the possible implementation of any one of the first to the tenth aspects of the third aspect, in the eleventh possible implementation manner of the third aspect, the subframe structure of the first subframe further includes data A symbol, wherein the cyclic prefix of the data symbol is an extended cyclic prefix.

With the possible implementation of any one of the first to the tenth aspects of the third aspect, in a twelfth possible implementation manner of the third aspect, the subframe structure of the first subframe further includes data a symbol, wherein a cyclic prefix of the first data symbol in the first subframe is an extended cyclic prefix.

With reference to the eleventh or twelfth possible implementation manner of the third aspect, in the thirteenth possible implementation manner of the third aspect, the extended cyclic prefix is that the length of the cyclic prefix is greater than The length of the cyclic prefix of the data symbol included in the subframe transmitted by the first communication device to the base station.

With the possible implementation of any one of the second to the tenth aspects of the third aspect, in the fourteenth possible implementation manner of the third aspect, the time unit is time sampling, and the symbol is orthogonal Frequency division multiple access OFDMA symbols or single carrier frequency division multiple access SC-FDMA symbols.

With reference to the possible implementation of the fourth aspect to the fourteenth aspect of the third aspect, in a fifteenth possible implementation manner of the third aspect, the determining module includes: a receiving unit and a first determining unit The receiving unit is configured to receive a subframe configuration instruction sent by the base station, where the first determining unit is configured to determine, in the subframe structure of the first subframe, according to the subframe configuration instruction received by the receiving unit The length of the guard interval and the position of the guard interval in the first subframe, or the first determining unit is configured to determine the first subframe according to the subframe configuration instruction received by the receiving unit The length of the data signal in the subframe structure and the position of the data signal in the first subframe.

With the fifteenth possible implementation manner of the third aspect, in a sixteenth possible implementation manner of the third aspect, the determining module further includes a second determining unit, where the second determining unit is configured to perform The subframe configuration instruction determines a transmission moment of the first subframe.

With reference to the third aspect to the fourteenth possible implementation of the third aspect, in a seventeenth possible implementation manner of the third aspect, the determining module includes a third determining unit, where a determining unit, configured to determine, according to a transmission mode of the first subframe, a state of the guard interval in the subframe structure of the first subframe, and the foregoing, according to a state of the first subframe and/or a state of one subframe subsequent to the first subframe Protection interval Determining a position in the first subframe, or the third determining unit is configured to determine, according to a transmission mode of the first subframe and a state of one subframe after the first subframe and/or after the first subframe The length of the data signal in the subframe structure of the subframe and the position of the data signal in the first subframe.

With the seventeenth possible implementation manner of the third aspect, in the eighteenth possible implementation manner of the third aspect, the determining module further includes a fourth determining unit, The transmission mode of one subframe determines the transmission timing of the first subframe before the state of the first subframe and/or the state of one subframe after the first subframe.

With reference to any one of the eighteenth aspect to the eighteenth aspect, in a nineteenth possible implementation manner of the third aspect, the communication device further includes a second sending module, The second sending module is configured to send a subframe configuration instruction of the first subframe to the second communications device.

In a fourth aspect, the present invention provides a communication device, where the communication device includes: a determining module and a receiving module; the determining module is configured to determine a subframe structure of a first subframe sent by the first communications device; The first subframe is received according to the subframe structure of the first subframe determined by the determining module, where the receiving module identifies that the first subframe is included according to the subframe structure During the guard interval, the signal of the location of the guard interval in the first subframe is not received within the length of the guard interval, or the receiving module identifies the first frame according to the subframe structure. When a data signal is included in a subframe, a signal of a location of the data signal in the first subframe is received within a length of the data signal.

In a first possible implementation manner of the fourth aspect, the subframe structure of the first subframe is dynamic, where the subframe structure of the first subframe is dynamic, and any adjacent two are The subframe structure of the first subframe may be different.

With reference to the fourth aspect, or the first possible implementation manner of the fourth aspect, in a second possible implementation manner of the fourth aspect, the subframe structure of the first subframe is a first subframe structure, The length of the guard interval in the first subframe structure is a symbol or M ₂ time units, and the position of the guard interval in the first subframe is the tail of the first subframe, where the positive number is The M ₂ is a positive integer; or, the length of the data signal in the first subframe structure is ^1 ₃ symbols or M ₄ And a position of the data signal in the first subframe is a header of the first subframe, where the ^1 ₃ is a positive number, and the M ₄ is a positive integer.

With reference to the fourth aspect, or the first possible implementation manner of the fourth aspect, in a third possible implementation manner of the fourth aspect, the subframe structure of the first subframe is a second subframe structure, The length of the guard interval in the second subframe structure is a symbol or N ₂ time units, and the position of the guard interval in the first subframe is the head of the first subframe, where the Is a positive number, the N ₂ is a positive integer; or the length of the data signal in the second subframe structure is N ₃ symbols or N ₄ time units, and the data signal is in the first subframe The position is a tail of the first subframe, wherein the N ₃ is a positive number, and the N ₄ is a positive integer.

With reference to the fourth aspect, or the first possible implementation manner of the fourth aspect, in a fourth possible implementation manner of the fourth aspect, the subframe structure of the first subframe is a third subframe structure, The length of the guard interval in the third subframe structure is a symbol or K ₂ time units, and the position of the guard interval in the first subframe is the head and the tail of the first subframe, where ^ is a positive integer, or Κ ₂ is a positive integer; or, the length of the data signal in the third subframe structure is ₃ symbols or Κ ₄ time units, and the data signal is in the first subframe The position is the middle of the first subframe, wherein the Κ ₃ is a positive number, and the Κ ₄ is a positive integer.

With reference to the fourth aspect, or the first possible implementation manner of the fourth aspect, in a fifth possible implementation manner of the fourth aspect, the subframe structure of the first subframe is a fourth subframe structure, The length of the guard interval in the fourth subframe structure is 0 symbols or 0 time units.

In conjunction with the second or third or fourth possible implementation of the fourth aspect, in a sixth possible implementation manner of the fourth aspect, the length of the guard interval is greater than or equal to a transceiving conversion time requirement and is less than The transceiving conversion time requirement is twice or more, or the length of the protection interval is greater than or equal to twice the transceiving conversion time requirement, wherein the transceiving conversion time requirement is a predefined value.

In conjunction with the second or third or fourth possible implementation of the fourth aspect, in a seventh possible implementation of the fourth aspect, the Μ ₂ or Ν ₂ or Κ _{2 is} greater than or equal to 624 and Less than 1248, or Μ ₂ or Ν ₂ or Κ _{2 is} greater than or equal to 1248. With reference to any one of the fourth aspect to the seventh aspect of the fourth aspect, in the eighth possible implementation manner of the fourth aspect, the subframe structure of the first subframe further includes a data symbol , wherein the cyclic prefix of the data symbol is an extended cyclic prefix.

With reference to any one of the fourth aspect to the seventh aspect of the fourth aspect, in a ninth possible implementation manner of the fourth aspect, the subframe structure of the first subframe further includes a data symbol The cyclic prefix of the first data symbol in the first subframe is an extended cyclic prefix.

With reference to the eighth or the ninth possible implementation manner of the fourth aspect, in the tenth possible implementation manner of the fourth aspect, the extended cyclic prefix is that the length of the cyclic prefix is greater than the first The length of the cyclic prefix of the data symbol contained in the subframe transmitted by the communication device to the base station.

With reference to the possible implementation of the second to seventh aspects of the fourth aspect, in the eleventh possible implementation manner of the fourth aspect, the time unit is time sampling, and the symbol is orthogonal Frequency division multiple access OFDMA symbols or single carrier frequency division multiple access SC-FDMA symbols.

With reference to any one of the fourth aspect to the eleventh aspect of the fourth aspect, in a twelfth possible implementation manner of the fourth aspect, the determining module includes: a receiving unit and a determining unit; The receiving unit is configured to receive a subframe configuration instruction sent by the base station or the first communications device, where the determining unit is configured to determine, according to the subframe configuration instruction received by the receiving unit, the subframe of the first subframe The length of the guard interval in the structure and the position of the guard interval in the first subframe, or the determining unit is configured to determine the first child according to the subframe configuration instruction received by the receiving unit The length of the data signal in the subframe structure of the frame and the location of the data signal in the first subframe.

With reference to any of the possible implementations of the fourth aspect to the eleventh aspect, in a thirteenth possible implementation manner of the fourth aspect, the determining module is specifically configured to be used according to the first subframe The transmission mode and the state of one subframe before the first subframe and/or after the first subframe determine the length of the guard interval in the subframe structure of the first subframe and the guard interval in the first subframe a location, or the determining module is specifically configured to determine data in a subframe structure of the first subframe according to a transmission mode of the first subframe and a state of one subframe before the first subframe and/or after the first subframe The length of the signal and the location of the data signal in the first subframe. In a fifth aspect, the present invention provides a device for transmitting a signal to a device, the device comprising: a processor, a memory coupled to the processor, and a transmitter; the processor is configured to determine the first subframe a transmission time and a subframe structure of the first subframe, where the first subframe includes a guard interval, and the subframe structure of the first subframe includes a length of the guard interval and the guard interval is a position in the first subframe, or, in the first subframe, a data signal, where a subframe structure of the first subframe includes a length of the data signal and the data signal is in the first a location in a subframe; the memory is configured to store a transmission moment of the first subframe determined by the processor and a subframe structure of the first subframe; and the processor is configured to send in the first subframe And controlling, by the transmitter, the first subframe to send to the second communications device according to the subframe structure of the first subframe.

In a first possible implementation manner of the fifth aspect, the subframe structure of the first subframe is dynamic, where the subframe structure of the first subframe is dynamic, and any adjacent two are The subframe structure of the first subframe may be different.

In a sixth aspect, the present invention provides a device for receiving a signal from a device to a device, the device comprising: a processor, a memory coupled to the processor, and a receiver; the receiver for receiving the first communication device Sending a first subframe; the memory is configured to store the received first subframe; the processor is configured to retrieve the first subframe stored by the memory, and determine the first subframe sent by the first communications device a sub-frame structure; the processor is further configured to: when the protection interval is included in the first subframe according to the subframe structure, control the receiver not to receive within a length of the guard interval a signal of a location of the guard interval in the first subframe, or the processor is further configured to: when the data signal is included in the first subframe according to the subframe structure, in the data Within the length of the signal, the receiver is controlled to receive a signal at the location of the data signal in the first sub-frame and to save the received signal in the memory.

In a first possible implementation manner of the sixth aspect, the subframe structure of the first subframe is dynamic, where the subframe structure of the first subframe is dynamic, and any adjacent two are The subframe structure of the first subframe may be different.

The first communication device of the present invention determines the transmission time of the first subframe and the subframe structure of the first subframe, The first subframe includes a guard interval, and the subframe structure of the first subframe includes a length of the guard interval and a position of the guard interval in the first subframe; A communication device transmits the first subframe to the second communication device according to the subframe structure of the first subframe at a sending moment of the first subframe. By combining the transmission time of the first subframe and the subframe structure of the first subframe, resources can be rationally utilized without widening the transmission efficiency of the system, and the adaptation range is wide.

[Description of the Drawings]

1 is a flowchart of an embodiment of a method for transmitting a device-to-device communication according to the present invention; FIG. 2 is a schematic diagram showing a structure of a first subframe structure in a method for transmitting a device-to-device communication according to the present invention;

3 is a schematic diagram of determining a transmission time when the first subframe structure is used in a method for transmitting a device to device communication according to the present invention;

4 is a schematic structural diagram of a second subframe structure in a method for transmitting a device to device communication according to the present invention;

5 is a schematic structural diagram of a third subframe structure in a method for transmitting a device to device communication according to the present invention;

6 is a flow chart showing another embodiment of a method for transmitting a device-to-device communication according to the present invention;

7 is a flow chart showing still another embodiment of a method for transmitting a device-to-device communication according to the present invention;

8 is a flow chart showing still another embodiment of a method for transmitting a device-to-device communication according to the present invention;

9 is a flowchart of an embodiment of a method for receiving a device-to-device communication according to the present invention; FIG. 10 is a flow chart of another embodiment of a method for receiving a device-to-device communication according to the present invention;

11 is a schematic structural diagram of an embodiment of a communication device according to the present invention; 12 is a schematic structural diagram of another embodiment of a communication device according to the present invention;

13 is a schematic structural diagram of still another embodiment of a communication device according to the present invention;

14 is a schematic structural diagram of still another embodiment of a communication device according to the present invention;

15 is a schematic structural diagram of still another embodiment of a communication device according to the present invention;

16 is a schematic structural diagram of still another embodiment of a communication device according to the present invention;

Figure 17 is a block diagram showing an embodiment of a transmitting apparatus for signal-to-device communication of the present invention;

Figure 18 is a block diagram showing an embodiment of a receiving apparatus for a device-to-device communication signal of the present invention.

【detailed description】

The invention will now be described in detail in conjunction with the drawings and embodiments.

Referring to FIG. 1 , FIG. 1 is a flowchart of an embodiment of a method for transmitting a device-to-device communication according to the present invention. The embodiment is a flowchart of a signal sending end, and includes:

Step S101: The first communication device determines a transmission time of the first subframe and a subframe structure of the first subframe, where the first subframe includes a guard interval, and the subframe structure of the first subframe includes a length of the guard interval. And the position of the guard interval in the first subframe, or, in the first subframe, the data signal, the subframe structure of the first subframe includes the length of the data signal and the position of the data signal in the first subframe.

The first communication device, that is, the signal transmitting end, may be a D2D device, the second communication device, that is, the signal receiving end, may be a D2D device, and the D2D device may be a user equipment UE; or the first communication device may be a relay node, and the second The communication device may be a relay node or a UE; or, the first communication device may be a UE, and the second communication device may be a relay node.

The first subframe refers to a subframe that needs to be transmitted currently.

The so-called frame structure refers to the specific arrangement of the positions of all time periods (such as: time slots) in a frame, so that the receiving end can allocate and identify their relative positions according to a specified time period, and realize time division multiplexing, usually in one frame. Includes information and overhead. For example, LTE supports two basic modes of operation, Frequency Division Duplex (FDD). And time division duplex (TDD); support two different radio frame structures, namely Type1 and Type2 frame structures, with a frame length of 10ms. The Typel frame structure is suitable for full-duplex and half-duplex FDD, and the Type2 frame structure is only applicable to TDD. A Typel frame consists of 20 0.5 ms long time slots, and two adjacent time slots form one subframe. The Type 2 frame is divided into two 5 ms wireless fields, each of which consists of 5 subframes of length 1 ms. Each of the above subframes includes N _symb symbols, and each time slot includes N _symb symbols, where each symbol includes a body part and a cyclic prefix, corresponding to a normal cyclic prefix, N, corresponding to an extended cyclic prefix.

The guard interval refers to a time period that has a certain length and is located in a subframe. Specifically, the guard interval refers to a time period that has a certain length and is located in a subframe and is not used for transmitting a signal and/or is not used for receiving a signal, and is used for In the D2D communication, the signal transmitting end is converted from the receiving state to the transmitting state or the signal receiving end is converted from the transmitting state to the receiving state. The subframe structure of the first subframe includes the length of the guard interval and the position of the guard interval in the first subframe. The length of the guard interval may determine the length of the guard interval, and the location of the guard interval may determine the specific location of the period length in the subframe. In practical applications, the location of the guard interval does not transmit data or sends a signal identifying the guard interval.

The data signal refers to a signal that the first communication device really needs to transmit and that the second communication device is expected to receive. Specifically, the data signal may be a discovery signal or a communication signal. The discovery signal is used by the second communication device to discover the first communication device, and the communication signal is used to transmit the communication information sent by the first communication device to the second communication device. The position of the data signal in the first sub-frame can determine the location at which the data signal is received. The length of the data signal can determine the extent of the data signal to be received or the length of the time period of the data signal to be received. The subframe structure of the first subframe includes a length of the data signal and a position of the data signal in the first subframe, so that the second communication device can determine the data signal to be received according to the subframe structure of the first subframe. The location and the extent of the data signal that needs to be received or the length of the time period. By determining the length of the data signal in the sub-frame structure and the position of the data signal in the first sub-frame, it is also ensured that the signal transmitting end is switched from the receiving state to the transmitting state or the signal receiving end is switched from the transmitting state to the receiving state.

Therefore, the subframe structure of the first subframe in this embodiment is determined in two ways, and one is The length of the guard interval and the position of the guard interval in the first sub-frame, determining the position at which the signal is not received and the duration or duration of the non-received signal, and the other is based on the length of the data signal and the data signal at the first The position in the sub-frame determines the location at which the data signal is received and the range or duration over which the data signal is received.

It should be noted that the subframes described in the present invention may also be time slots or frames or other time structures. For example, the first subframe may also be the first slot, and the subframe structure of the first subframe may also be the slot structure of the first slot. Taking the LTE system as an example, a Typel frame is composed of 20 time slots of 0.5 ms length, and two adjacent time slots form one subframe. The transmission timing of the first subframe may determine the transmission timing of the first subframe at the reference time or before the reference time or after the reference time according to the state and the specific case of the first subframe.

The first communication device can ensure that the second communication device has sufficient time to convert to the receiving state by determining the sending moment of the first subframe and the subframe structure of the first subframe, so as to receive the first subframe sent by the first communications device. A truly valid data signal in the frame, so that resources can be rationally utilized without widening the transmission efficiency of the system, and the range of adaptation is wide.

The subframe structure of the first subframe is dynamic, where the subframe structure of the first subframe is dynamic, that is, the subframe structure of any two adjacent first subframes may be different, that is, any The subframes of two adjacent first subframes are the same or different. In this way, the subframe structure of the first subframe can be flexibly changed according to specific conditions, and the resources can be reasonably utilized without widening the transmission efficiency of the system, and the adaptation range is wide.

Specifically, in a practical application, the subframe structure of the first subframe may be a four-seed frame structure as follows:

(1) The subframe structure of the first subframe is a first subframe structure, and the length of the guard interval in the first subframe structure is a symbol or M ₂ time units, and the position of the guard interval in the first subframe is a tail of a subframe, where the positive number, the M ₂ is a positive integer, or the length of the data signal in the first subframe structure is M ₃ symbols or M ₄ time units, and the data signal is at the first The position in the subframe is the head of the first subframe, where M ₃ is a positive number and M ₄ is a positive integer. For example, the protection room in the first subframe The interval is the last symbol in the first subframe, or the data signal in the first subframe is the first 13 symbols in the first subframe. As shown in FIG. 2, the shaded portion is the guard interval, and the non-shaded portion is the data signal. It should be noted that, and M ₃ may also be a positive number including a fractional part, for example, the guard interval in the first subframe is the last 0.8 symbols in the first subframe, or the data signal in the first subframe is the first subframe. The first 13.2 symbols in the middle. Generally, if the first subframe includes a symbol, the guard interval in the first subframe is the last symbol in the first subframe, or the data signal in the first subframe is the preceding ^^ symbol in the first subframe, where Is a positive integer, for example, 14, 13, or 12. When N _b = 14, the cyclic prefix of the symbol contained in the first subframe is a normal cyclic prefix. When ^ = 13, 12, the symbol contained in the first subframe The cyclic prefix is an extended cyclic prefix. The so-called extended cyclic prefix means that the cyclic prefix has a longer time length than the normal cyclic prefix.

At this time, the first communication device determines the sending moment of the first subframe, including: if the subframe structure of the first subframe is the first subframe structure, the first communications device determines that the sending moment of the first subframe is the reference moment After Ί\ time units, where Ί\ is a positive integer.

The reference time may be a predetermined time or a time notified by the base station, and Ί\ may be a predefined value, or a value determined according to Μ ₂ or Μ ₃ or Μ ₄ , or a value notified by the base station, or according to the The value determined by a sub-frame structure. For example, the reference time may be the start time of the subframe sent by the first communication device to the base station, that is, the start of the subframe sent to the base station when the first communication device sends the subframe to the base station at the location of the first subframe. The time is the reference time; or, the reference time may be the start time of the subframe sent by the corresponding receiving base station of the first communications device, that is, if the first communications device receives the transmitting subframe of the base station at the location of the first subframe, the receiving base station sends The start time of the subframe is a reference time; or, the reference time may be a time determined by the first communication device according to the synchronization source node or the timing reference node. For example, the value of Ί can be Μ Λ^^ or Μ ₂ /2 or (N _T ^s -Μ ₃ *Λ^"*)/2 or (N _T ^s -M ₄ )/2, where Nr* is per The number of time units included in each symbol, N _T ^s is the number of time units included in each subframe. For example, as shown in FIG. 3, each strip represents one subframe, where 1 indicates that the base station does not operate, 3 Indicates that UE1 transmits a subframe to UE2, 7 indicates that UE2 receives a subframe transmitted by UE1, 2 indicates that the base station receives a subframe transmitted by UE1 and UE2, and 4 indicates that UE1 transmits a subframe to the base station, and 8 indicates that the UE1 transmits a subframe to the base station, and 8 indicates that UE2 sends a subframe to the base station; 5 indicates that UE1 receives the subframe transmitted by UE2, 9 indicates that UE2 transmits a subframe to UE1; 6 indicates that UE1 transmits a subframe to the base station, 10 indicates that UE2 transmits a subframe to the base station; and 11 indicates a guard interval (protection The positions of the intervals are all at the end of the first subframe), and 12 indicates the reference time. When UE2 (ie, the first communication device) transmits D2D data to UE1 on the third subframe (ie, the first subframe) (corresponding to sequence number 9), the third subframe (ie, the first subframe) is delayed relative to the reference time. Ί\ time units are transmitted, so the time when UE1 receives the third subframe (ie, the first subframe) is located after the second subframe, and the second subframe is the subframe in which UE1 sends data to the base station. The time when the transmission time from the transmission state to the reception state is left for the UE1 by the first subframe structure and the transmission time of the first subframe is the time unit after the reference time.

(2) The subframe structure of the first subframe is a second subframe structure, and the length of the guard interval in the second subframe structure is a symbol or N ₂ time units, and the position of the guard interval in the first subframe is a header of a subframe, where the ^ is a positive number, and the N ₂ is a positive integer; or, the length of the data signal in the second subframe structure is N ₃ symbols or N ₄ time units, and the data signal is The position in the first subframe is the tail of the first subframe, where N ₃ is a positive number and N ₄ is a positive integer. For example, the guard interval in the first subframe is the first symbol in the first subframe, or the data signal in the first subframe is the last 13 symbols in the first subframe. As shown in FIG. 4, the shaded portion is a guard interval, and the non-shaded portion is a data signal. It should be noted that the sum may also be a positive number including a fractional part, for example, the guard interval in the first subframe is the first 0.8 symbols in the first subframe, or the data signal in the first subframe is the back in the first subframe. 13.2 symbols. Generally, if the first subframe includes multiple symbols, the guard interval in the first subframe is the first symbol in the first subframe, or the data signal in the first subframe is the subsequent ^^-^^ in the first subframe. Symbol, where 1 is a positive integer, for example, ₁₄ , ₁₃ , or ₁₂ . When A^ _mb = i4, the cyclic prefix of the symbol contained in the first subframe is a normal cyclic prefix. When N _mb = 13,12, the first The cyclic prefix of a symbol contained in a subframe is an extended cyclic prefix, and the extended cyclic prefix means that the cyclic prefix has a time length greater than a normal cyclic prefix.

At this time, the step of determining, by the first communications device, the sending moment of the first subframe, includes: if the subframe structure of the first subframe is the second subframe structure, determining, by the first communications device, that the sending time of the first subframe is Reference T ₂ time units before the time, wherein the τ ₂ is a positive integer.

The reference time may be a predetermined time or a time notified by the base station, and τ ₂ may be a predefined value, or a value determined according to ^ or ^ or Ν ₃ or Ν ₄ , or a value notified by the base station, or according to the The value determined by the second sub-frame structure. The specific example is similar to the case where the subframe structure of the first subframe is the first subframe structure, and details are not described herein again.

(3) The subframe structure of the first subframe is a third subframe structure, and the length of the guard interval in the third subframe structure is a symbol or K ₂ time units, and the position of the guard interval in the first subframe is a header and a tail of a subframe, where ^ is a positive number, Κ ₂ is a positive integer; or, the length of the data signal in the third subframe structure is Κ ₃ symbols or time units, and the data signal is in the first subframe The position in is the middle of the first subframe, where Κ ₃ is a positive number and Κ ₄ is a positive integer. For example, the guard interval in the first subframe is a part of the first symbol in the first subframe and a part of the last symbol, or the data signal in the first subframe is the first symbol in the first subframe. Part of the first part of the last symbol, that is, in the middle of the first sub-frame. As shown in FIG. 5, the shaded portion is the guard interval, and the non-shaded portion is the data signal.

(4) The subframe structure of the first subframe is a fourth subframe structure, and the length of the guard interval in the fourth subframe structure is 0 symbols or 0 time units. That is, there is no guard interval in the current subframe. For example, the previous subframe of the first subframe is sent by UE1 to UE2, and the latter subframe of the first subframe will also be sent by UE1 to UE2. Since the state of UE2 is always in the receiving state, no conversion is needed. The subframe structure of the current first subframe may be a fourth subframe structure, that is, a guard interval is not required.

If the subframe is the first subframe structure of the third or fourth sub-subframe structure in a frame structure, a first communication device determines the transmission time of the first sub-frame is a reference time or reference Τ ₃ time units before the time, Or 参考₄ time units after the reference time, where Τ ₃ and Τ ₄ are positive integers.

The reference time may be a predetermined time or a time notified by the base station, and Τ ₃ may be a predefined value, or a value determined according to ₂ or Κ ₃ or Κ ₄ , or a value notified by the base station, or according to the The value determined by the three subframe structure; Τ ₄ may be a predefined value, or a value determined according to the fourth subframe structure. The specific example is that the subframe structure of the first subframe is the first subframe junction. The construction time is similar and will not be described here. In particular, the value of T ₃ or T ₄ may be zero.

Further, when the subframe structure of the first subframe is one of the first subframe structure, the second subframe structure, the third subframe structure, or the fourth subframe structure, the subframe structure of the first subframe The data symbol is further included, wherein the cyclic prefix of the data symbol is an extended cyclic prefix; or the subframe structure of the first subframe further includes a data symbol, wherein a cyclic prefix of the first data symbol in the first subframe is Lengthened cyclic prefix. Specifically, the extended cyclic prefix means that the length of the cyclic prefix is greater than the length of the cyclic prefix of the data symbol contained in the subframe transmitted by the first communication device to the base station. For example, when the subframe structure of the first subframe is the fourth subframe structure, the first subframe may include 14 data symbols, where the cyclic prefix of the data symbol is a normal cyclic prefix, that is, the 0th and 7th data symbols. The cyclic prefix length is 160Ts, and the cyclic prefix length of other data symbols is 144Ts. In this case, the cyclic prefix length is equal to the length of the cyclic prefix of the data symbols contained in the subframe transmitted by the first communication device to the base station. When the subframe structure of the first subframe is the fourth subframe structure, the first subframe may also include 13 data symbols, where the cyclic prefix of the data symbol is an extended cyclic prefix, that is, the loop length of the 0th data symbol is 448Ts, the other data symbols have a cyclic prefix length of 304Ts.

Further, when the subframe structure of the first subframe is the first subframe structure, the second subframe structure, or the third subframe structure, the length of the guard interval is greater than or equal to the transceiving conversion time requirement and is smaller than the transceiving conversion time requirement. Twice, or the length of the guard interval is greater than or equal to twice the demand for the transceiving conversion time. Specifically, when the subframe structure of the first subframe is the first subframe structure, the second subframe structure, or the third subframe structure, M ₂ or N ₂ or K _{2 is} greater than or equal to 624 and less than 1248, or Μ ₂ Or Ν ₂ or Κ _{2 is} greater than or equal to 1248.

In general, the transmission and reception of the two sides of the sub-frame requires up to 1248Ts, that is, 40.625us (including the received transmission conversion time of 20.3125us and the transmission-to-reception conversion time of 20.3125us). The sub-frame single-side transceiving conversion requires up to 624Ts, that is, 20.3125. Us (which contains the received send conversion time

20.3125us or the conversion time sent to the reception is 20.3125us). In the LTE system, the duration of a data symbol with a normal cyclic prefix (CP, Cyclic Prefix) is generally 71.4us, so when the data symbol is cyclically prefixed In order to adopt an extended cyclic prefix, it is guaranteed that valid data symbols are suitable. Should be a large transmission distance, while meeting the needs of the protection interval. For example, in an LTE system, the duration of a data symbol with a normal cyclic prefix is generally 2192 Ts, and the length of the guard interval in the first subframe structure is 1360 Ts (more than the requirement for transceiving on both sides of the subframe: 1248 Ts), valid data symbols. The length of the CP of each data symbol can be increased by 64 Ts. Specifically, when the subframe structure of the first subframe is the first subframe structure, the length of the guard interval included in the first subframe is 1360 Ts, and Contains 13 valid data symbols, where the cyclic prefix of the data symbol is an extended cyclic prefix, that is, the cyclic prefix length of the 0th and 7th data symbols is 224Ts, and the cyclic prefix length of other data symbols is 208Ts; The guard interval length in a sub-frame structure is 736Ts (more than the requirement of one-side transceiving of the sub-frame: 624Ts), and the effective data symbols are 13, wherein the CP length of each data symbol can be increased by 112Ts, specifically, the first sub- When the subframe structure of the frame is the first subframe structure, the first subframe includes a guard interval of 736Ts, and further includes 13 valid data symbols, where the data Cyclic prefix number is extended cyclic prefix, i.e., the cyclic prefix length of 0 and seven data symbols is 272Ts, the cyclic prefix length of the other data symbols to 256Ts. When the subframe structure of the first subframe is the second subframe structure or the second subframe structure, the length of the guard interval and the length of the CP are the same as the above examples, except that the positions of the guard intervals are different.

Further, in order to ensure that the UE receiving the current first subframe can perform adaptive gain control (AGC) by using the CP of the first data symbol, the CP of the first data symbol is an extended CP, for example, the first data symbol. CP boost. 944Ts, the guard interval length is 1248Ts (equivalent to the requirement of transceiving on both sides of the subframe: 1248Ts). For example, when the subframe structure of the first subframe is the first subframe structure, the length of the guard interval included in the first subframe. It is 1248Ts, and also contains 13 valid data symbols. The cyclic prefix of the first data symbol is an extended cyclic prefix. The cyclic prefix of other data symbols is a normal cyclic prefix, that is, the cyclic prefix length of the 0th data symbol is 1104Ts. The cyclic prefix length of the seventh data symbol is 160Ts, and the cyclic prefix length of other data symbols is 144Ts; or, the length of the CP of the first data symbol can be increased more than the length of the CP of other data symbols, for example, The CP of the first data symbol is increased by 176Ts, and the length of the CP of each of the other data symbols is increased by 64Ts. The length of the guard interval is 1248Ts. For example, when the subframe structure of the first subframe is the first subframe structure, the first subframe. Contains The guard interval has a length of 1248Ts, and further contains 13 valid data symbols, wherein the cyclic prefix of the first data symbol is an extended cyclic prefix, and the cyclic prefix of other data symbols is a long cyclic prefix, that is, the 0th data symbol. The cyclic prefix length is 336Ts, the cyclic prefix length of the seventh data symbol is 224Ts, and the cyclic prefix length of other data symbols is 208Ts.

Further, in order to ensure that the UE receiving the current first subframe can perform adaptive gain control (AGC) by using the CP of the first data symbol, the CP of the first data symbol is an extended CP, for example, the first data symbol. The CP adds 1568Ts, and the guard interval length is 624Ts (equivalent to the requirement of one-side transmission and reception of the subframe: 624Ts). For example, when the subframe structure of the first subframe is the first subframe structure, the guard interval of the first subframe is included. The length is 624Ts, and it also contains 13 valid data symbols. The cyclic prefix of the first data symbol is the extended cyclic prefix. The cyclic prefix of other data symbols is the normal cyclic prefix, that is, the cyclic prefix length of the 0th data symbol. For 1728Ts, the cyclic prefix length of the 7th data symbol is 160Ts, and the cyclic prefix length of other data symbols is 144Ts; or, the length of the CP of the first data symbol can be increased more than the length of the CP of other data symbols. For example, the CP of the first data symbol is increased by 800Ts, and the CP length of each of the other data symbols is increased by 64Ts, and the guard interval length is 62. 4Ts, for example, when the subframe structure of the first subframe is the first subframe structure, the first subframe includes a guard interval of 624Ts, and further includes 13 valid data symbols, wherein the first data symbol has a cyclic prefix. For the extended cyclic prefix, the cyclic prefix of other data symbols is an extended cyclic prefix, that is, the cyclic prefix length of the 0th data symbol is 960Ts, the cyclic prefix length of the 7th data symbol is 224Ts, and the cyclic prefix length of other data symbols. It is 208Ts.

It should be noted that the foregoing time unit may be time sampling, for example, the time unit may be specified in the LTE protocol.

Second; the above symbols may be orthogonal frequency division multiple access OFDMA symbols or single carrier frequency division multiple access SC-FDMA symbols.

Step S102: The first communications device sends the first subframe to the second communications device according to the subframe structure of the first subframe at the sending moment of the first subframe.

When the sending time of the first subframe arrives, the first communications device may send the first subframe to the second communications device according to the subframe structure of the first subframe, so that the second communications device may receive the first communications device. The first subframe to be sent.

The first communication device determines the transmission time of the first subframe and the subframe structure of the first subframe, where the first subframe includes a guard interval, and the subframe structure of the first subframe includes a guard interval. a position of the length and the guard interval in the first subframe, or a data signal in the first subframe, a length of the subframe structure data signal of the first subframe, and a position of the data signal in the first subframe; The device sends the first subframe to the second communication device according to the subframe structure of the first subframe at the sending moment of the first subframe. By combining the transmission time of the first subframe and the subframe structure of the first subframe, resources can be rationally utilized without widening the transmission efficiency of the system, and the adaptation range is wide. In addition, the four-seed frame structure and the transmission timing of the respective first sub-frames can utilize resources more fully and reasonably; when the cyclic prefix of the data symbols is an extended cyclic prefix, the effective data symbols can be guaranteed to adapt to a larger transmission distance. The symbol may be an orthogonal frequency division multiple access OFDMA symbol or a single carrier frequency division multiple access SC-FDMA symbol, so that the subframe structure of the first subframe is more widely applicable.

Referring to FIG. 6, FIG. 6 is a flowchart of another embodiment of a method for transmitting a device-to-device communication according to the present invention. The present embodiment is a flowchart of a signal sending end, and the embodiment is basically the same as the embodiment of FIG. For the same place, please refer to FIG. 1 and the corresponding text description, except that step S201 includes three sub-steps, the specific differences are as follows:

Step S201: The first communication device determines a transmission time of the first subframe and a subframe structure of the first subframe, where the first subframe includes a guard interval, and the subframe structure of the first subframe includes a length of the guard interval. And a position of the guard interval in the first subframe, or, in the first subframe, a data signal, where the subframe structure of the first subframe includes a length of the data signal and a position of the data signal in the first subframe .

Step S201 includes sub-step S201a, sub-step S201b, and sub-step S201c, wherein sub-step S201b and sub-step S201c have no obvious sequence, and the specific contents are as follows:

Sub-step S201a: The first communication device receives the subframe configuration instruction sent by the base station.

The base station pre-defines the length of the guard interval in the subframe structure of the subframe and the position of the guard interval in the subframe or the length of the data signal in the predefined subframe structure and the position of the data signal in the subframe, and defines the first The transmission time of the subframe, and then the base station will pre-define the subframe structure of the subframe and the first The sending moment of the subframe is sent to the first communications device in the form of a subframe configuration command, and the subframe configuration command may be high layer signaling or dynamic signaling.

Sub-step S201b: The first communication device determines, according to the subframe configuration instruction, the length of the guard interval in the subframe structure of the first subframe and the position of the guard interval in the first subframe, or the first communication device configures according to the subframe. The instruction determines a length of the data signal in the subframe structure of the first subframe and a position of the data signal in the first subframe.

Sub-step S201c: The first communication device determines the transmission time of the first subframe according to the subframe configuration instruction. Further, if the base station pre-defines the length of the cyclic prefix of the data symbol in the subframe, the first communication device may also determine the length of the cyclic prefix of the data symbol of the first subframe according to the subframe configuration instruction.

Step S202: The first communications device sends the first subframe to the second communications device according to the subframe structure of the first subframe at the sending moment of the first subframe.

The first communication device determines the transmission time of the first subframe and the subframe structure of the first subframe, where the first subframe includes a guard interval, and the subframe structure of the first subframe includes a guard interval. a position of the length and the guard interval in the first subframe, or a data signal in the first subframe, a length of the subframe structure data signal of the first subframe, and a position of the data signal in the first subframe; The device sends the first subframe to the second communication device according to the subframe structure of the first subframe at the sending moment of the first subframe. By combining the transmission time of the first subframe and the subframe structure of the first subframe, resources can be rationally utilized without widening the transmission efficiency of the system, and the adaptation range is wide. In addition, the use of the sub-frame configuration command by the base station can reasonably control the utilization of resources.

Referring to FIG. 7, FIG. 7 is a flowchart of still another embodiment of a method for transmitting a device-to-device communication according to the present invention. This embodiment is a flowchart of a signal transmitting end, and the embodiment is basically the same as the embodiment of FIG. For the same place, please refer to FIG. 1 and the corresponding text description, except that step S301 includes two sub-steps, and the specific differences are as follows:

Step S301: The first communication device determines a transmission time of the first subframe and a subframe structure of the first subframe, where the first subframe includes a guard interval, and the subframe structure of the first subframe includes a length of the guard interval. And the position of the guard interval in the first subframe, or, in the first subframe, the data signal, the subframe structure of the first subframe includes the length of the data signal and the position of the data signal in the first subframe.

Step S301 includes sub-step S301a and sub-step S301b, wherein sub-step S301a and sub-step S301b have no obvious sequence, and the specific content is as follows:

Sub-step S301a: The first communication device determines the length of the guard interval in the subframe structure of the first subframe according to the transmission mode of the first subframe and the state of one subframe before the first subframe and/or after the first subframe. And determining, by the first communication device, the first sub-frame according to the transmission mode of the first sub-frame and the state of the one sub-frame before the first sub-frame and/or after the first sub-frame The length of the data signal in the subframe structure of the frame and the position of the data signal in the first subframe.

The transmission mode may be a D2D transmission mode (such as signal transmission between the UE and the UE), or a Relay transmission mode (such as signal transmission between the relay node and the relay node or between the relay node and the UE), or non-D2D transmission. Mode non-Relay transmission mode (such as signal transmission between UE and base station or between relay node and base station).

The state of one subframe before the first subframe and/or after the first subframe includes at least one of the following: a transmission and reception state of one subframe before the first subframe and/or after the first subframe; One subframe before the subframe and/or one subframe after the first subframe is an attribute of the target node when transmitting; before the first subframe and/or one subframe after the first subframe is an attribute of the source node when receiving; The time interval between the end time of one subframe before the first subframe and the reference time; the time interval between the start time of one subframe after the first subframe and the reference time.

Specifically, if the previous subframe of the first subframe is a subframe that can send data to the base station, and the transmission mode of the first subframe is a D2D transmission mode or a Relay transmission mode, determining that the first subframe is the second subframe structure If the subframe after the first subframe is a subframe in which data can be transmitted to the base station or a subframe in which data is received or the first subframe is the last subframe in which the data is transmitted, the transmission mode of the first subframe is D2D transmission. Mode or Relay transmission mode, then determining that the first subframe is the first subframe structure; if the first subframe of the first subframe is a subframe that can send data to the base station, and one subframe after the first subframe is The subframe in which the base station transmits data, and the transmission mode of the first subframe is a D2D transmission mode or a relay transmission In the input mode, the first subframe is determined to be the third subframe structure; if the first subframe of the first subframe is a subframe that transmits data to the second communication device, and the subframe after the first subframe is the second subframe The communication device sends a subframe of data, and the transmission mode of the first subframe is a D2D transmission mode or a Relay transmission mode, and then determining that the first subframe is a fourth subframe structure.

Further, if the last subframe used for transmitting data before the first subframe is a subframe that transmits data to the base station, and the time interval between the end time of the subframe and the reference moment is greater than a threshold, and if the first subframe is followed by The first subframe used for transmitting data is a subframe for transmitting data to the base station, and the time interval between the start time of the subframe and the reference moment is greater than a threshold, and the transmission mode of the first subframe is a D2D transmission mode or a Relay transmission mode. And determining that the first subframe is a fourth subframe structure; if the last subframe used for transmitting data before the first subframe is a subframe that sends data to the base station, and the end time of the subframe and the time of the reference moment The interval is greater than the threshold, and if the first subframe used for transmitting data after the first subframe is a subframe that transmits data to the base station, and the time interval between the start time of the subframe and the reference time is less than or equal to a threshold, the first The transmission mode of the subframe is a D2D transmission mode or a Relay transmission mode, and then the first subframe is determined to be the first subframe structure; if the first sub-frame The last subframe used for transmitting data is a subframe for transmitting data to the base station, and the time interval between the end time of the subframe and the reference time is less than or equal to the threshold, and if the first one after the first subframe is used for transmitting The subframe of the data is a subframe for transmitting data to the base station, and the time interval between the start time of the subframe and the reference moment is greater than a threshold, and the transmission mode of the first subframe is a D2D transmission mode or a Relay transmission mode, and then the first sub-determination is determined. The frame is a second subframe structure; if the last subframe used for transmitting data before the first subframe is a subframe that transmits data to the base station, and the time interval between the end time of the subframe and the reference time is less than or equal to a threshold, And if the first subframe used for transmitting data after the first subframe is a subframe for transmitting data to the base station, and the time interval between the start time of the subframe and the reference moment is less than or equal to a threshold, the transmission of the first subframe The mode is a D2D transmission mode or a Relay transmission mode, and then the first subframe is determined to be a third subframe structure. Wherein, the threshold is predefined. Using this method, the use of guard intervals can be reduced, thereby reducing overhead and increasing system throughput.

Sub-step S301b: The first communication device according to the transmission mode of the first subframe and before the first subframe and / Or the state of one subframe after the first subframe determines the transmission timing of the first subframe.

For example, the first communications device determines, according to the transmission mode of the first subframe and the state of the one subframe before the first subframe and/or one subframe after the first subframe, the transmission time is the reference time, that is, regardless of the subframe structure, Time is a reference moment. In this way, when there are other UEs or relay nodes transmitting data to the base station in the first subframe, the data symbols sent to the base station may be in the time domain with the data symbols sent by the first communication device in the current first subframe. Align to reduce interference between symbols.

Further, the method for determining, by the first communication device, the transmission time of the first subframe according to the transmission mode of the first subframe and the state of the one subframe before the first subframe and/or one subframe after the first subframe, and the sub-step S301a Determining, by the first communication device, the length of the guard interval and the guard interval in the subframe structure of the first subframe according to the transmission mode of the first subframe and the state of the one subframe before the first subframe and/or after the first subframe The method of the position in the first subframe is similar.

Preferably, the first communications device determines a sending moment of the first subframe according to a subframe structure of the first subframe. Step S302: The first communications device sends the first subframe to the second communications device according to the subframe structure of the first subframe at the sending moment of the first subframe.

The first communication device determines the transmission time of the first subframe and the subframe structure of the first subframe, where the first subframe includes a guard interval, and the subframe structure of the first subframe includes a guard interval. a position of the length and the guard interval in the first subframe, or a data signal in the first subframe, a length of the subframe structure data signal of the first subframe, and a position of the data signal in the first subframe; The device sends the first subframe to the second communication device according to the subframe structure of the first subframe at the sending moment of the first subframe. By combining the transmission time of the first subframe and the subframe structure of the first subframe, resources can be rationally utilized without widening the transmission efficiency of the system, and the adaptation range is wide. In addition, determining a subframe structure of the first subframe and a sending moment of the first subframe according to a transmission mode of the first subframe and a state of one subframe before the first subframe and/or after the first subframe, according to In a specific case, the subframe structure of the first subframe and the transmission timing of the first subframe are flexibly changed, thereby rationally utilizing resources, and the adaptation range is wide.

Referring to FIG. 8, FIG. 8 is a flowchart of still another embodiment of a method for transmitting a device-to-device communication according to the present invention. The present embodiment is a flowchart of a signal transmitting end, and the embodiment and the embodiment of FIG. The equations are basically the same. For the same place, please refer to Figure 1 and the corresponding text description. The difference lies in step S402. The specific differences are as follows:

Step S401: The first communication device determines a transmission time of the first subframe and a subframe structure of the first subframe, where the first subframe includes a guard interval, and the subframe structure of the first subframe includes a length of the guard interval. And the position of the guard interval in the first subframe, or, in the first subframe, the data signal, the subframe structure of the first subframe includes the length of the data signal and the position of the data signal in the first subframe.

Step S402: The first communications device sends a subframe configuration instruction of the first subframe to the second communications device. The subframe configuration instruction of the first subframe refers to an instruction about a configuration of a subframe structure of the first subframe, and the instruction may send the first subframe before or after transmitting the first subframe to the second communication device. The transmission time is transmitted to the second communication device, so that the second communication device receives the data or signal according to the subframe configuration instruction of the first subframe. It should be noted that there is no obvious sequence in step S402 and step S403.

Step S403: The first communications device sends the first subframe to the second communications device according to the subframe structure of the first subframe at the sending moment of the first subframe.

In the first embodiment of the present invention, the first communication device determines the transmission time of the first subframe and the subframe structure of the first subframe, where the first subframe includes a guard interval, and the subframe structure of the first subframe Include a length of the guard interval and a position of the guard interval in the first subframe, or include a data signal in a first subframe, a length of a subframe structure data signal of the first subframe, and a data signal in a a location in a subframe; the first communication device sends the first subframe to a second communication device according to a subframe structure of the first subframe at a sending moment of the first subframe. By combining the transmission timing of the first subframe and the subframe structure of the first subframe, it is possible to rationally utilize resources without widening the transmission efficiency of the system, and the adaptation range is wide.

Referring to FIG. 9, FIG. 9 is a flowchart of an embodiment of a method for receiving a device-to-device communication according to the present invention. The embodiment is a flowchart of a signal receiving end, and includes:

Step S501: The second communications device determines a subframe structure of the first subframe sent by the first communications device. The first communication device, that is, the signal transmitting end, may be a D2D device, and the second communication device, that is, a signal receiving The D2D device may be a D2D device, and the D2D device may be a user equipment UE; or the first communication device may be a relay node, and the second communication device may be a relay node or a UE; or the first communication device may be a UE, The second communication device can be a relay node.

Step S502: The second communications device receives the first subframe according to the subframe structure of the first subframe, where the length of the guard interval is determined if the second communications device identifies that the first subframe includes the guard interval according to the subframe structure. Within the range, the signal of the location of the guard interval in the first subframe is not received, or if the second communication device identifies that the data signal is included in the first subframe according to the subframe structure, the length of the data signal is received. The signal at the location of the data signal in a sub-frame.

The guard interval refers to a time period that has a certain length and is located in a subframe. Specifically, the guard interval refers to a time period that has a certain length and is located in a subframe and is not used for transmitting a signal and/or is not used for receiving a signal, and is used for In the D2D communication, the signal transmitting end is converted from the receiving state to the transmitting state or the signal receiving end is converted from the transmitting state to the receiving state. The length of the guard interval may determine the length of the guard interval, and the location of the guard interval may determine the specific location of the period length in the subframe. In practical applications, the location of the guard interval does not transmit data or sends a signal identifying the guard interval. Therefore, the second communication device does not receive the signal of the location of the guard interval in the first subframe within the length of the guard interval.

The data signal refers to a signal that the first communication device really needs to transmit and that the second communication device is expected to receive. Specifically, the data signal may be a discovery signal or a communication signal. The discovery signal is used by the second communication device to discover the first communication device, and the communication signal is used to transmit the communication information sent by the first communication device to the second communication device. The position of the data signal in the first sub-frame can determine the location at which the data signal is received. The length of the data signal can determine the extent of the data signal to be received or the length of the time period of the data signal to be received. The subframe structure of the first subframe includes a length of the data signal and a position of the data signal in the first subframe, so that the second communication device can determine the data signal to be received according to the subframe structure of the first subframe. The location and the extent of the data signal that needs to be received or the length of the time period. By determining the length of the data signal in the subframe structure and the position of the data signal in the first subframe, it is also ensured that the signal transmitting end is converted from the receiving state to the transmitting state or the signal receiving end is switched from the transmitting state. Switch to receiving status. Therefore, the second communication device receives the signal of the location of the data signal in the first subframe within the length of the data signal.

(1) The subframe structure of the first subframe is a first subframe structure, and the length of the guard interval in the first subframe structure is Mi symbols or M ₂ time units, and the position of the guard interval in the first subframe a tail of the first subframe, where the positive value, the M ₂ is a positive integer, or the length of the data signal in the first subframe structure is M ₃ symbols or M ₄ time units, and the data signal is The position in the first subframe is the head of the first subframe, where M ₃ is a positive number and M ₄ is a positive integer. For example, the guard interval in the first subframe is the last symbol in the first subframe, or the data signal in the first subframe is the first 13 symbols in the first subframe. It should be noted that, and M ₃ may also be a positive number including a fractional part, for example, the guard interval in the first subframe is the last 0.8 symbols in the first subframe, or the data signal in the first subframe is the first subframe. The first 13.2 symbols in the middle. Generally, if the first subframe includes a symbol, the guard interval in the first subframe is the last symbol in the first subframe, or the data signal in the first subframe is the front ^Λ _b - M _{1 in the} first subframe. a symbol, where is a positive integer, for example 14, 13, or 12, when N _b = 14, the cyclic prefix of the symbol contained in the first subframe is a normal cyclic prefix, when N _b = 13, 12, the first The cyclic prefix of the symbol contained in the subframe is an extended cyclic prefix. The so-called extended cyclic prefix means that the cyclic prefix has a longer time length than the normal cyclic prefix.

(2) The subframe structure of the first subframe is a second subframe structure, and the length of the guard interval in the second subframe structure is a symbol or N ₂ time units, and the position of the guard interval in the first subframe is a header of a subframe, where the ^ is a positive number, the N ₂ is a positive integer; or, the data in the second subframe structure The length of the signal is N ₃ symbols or N ₄ time units, and the position of the data signal in the first subframe is the tail of the first subframe, where N ₃ is a positive number and N ₄ is a positive integer. For example, the guard interval in the first subframe is the first symbol in the first subframe, or the data signal in the first subframe is the last 13 symbols in the first subframe. It should be noted,

N ₃ may also be a positive number including a fractional part, for example, the guard interval in the first subframe is the first 0.8 symbols in the first subframe, or the data signal in the first subframe is the 13.2 symbols in the first subframe. . Generally, if the first subframe includes a symbol, the guard interval in the first subframe is the first symbol in the first subframe, or the data signal in the first subframe is the next ^^ symbol in the first subframe, where A positive integer, for example, 14, 13, or 12, when N _mb = i4, the cyclic prefix of the symbol contained in the first subframe is a normal cyclic prefix, and when ^ = 13, 12, the symbol contained in the first subframe The cyclic prefix is an extended cyclic prefix. The so-called extended cyclic prefix means that the cyclic prefix has a longer time length than the normal cyclic prefix.

(3) The subframe structure of the first subframe is a third subframe structure, and the length of the guard interval in the third subframe structure is a symbol or K ₂ time units, and the position of the guard interval in the first subframe is a header and a tail of a subframe, where ^ is a positive number, Κ ₂ is a positive integer; or, the length of the data signal in the third subframe structure is Κ ₃ symbols or time units, and the data signal is in the first subframe The position in is the middle of the first subframe, where Κ ₃ is a positive number and Κ ₄ is a positive integer. For example, the guard interval in the first subframe is a part of the first symbol in the first subframe and a part of the last symbol, or the data signal in the first subframe is the first symbol in the first subframe. Part of the first part of the last symbol, that is, in the middle of the first sub-frame.

(4) The subframe structure of the first subframe is a fourth subframe structure, and the length of the guard interval in the fourth subframe structure is 0 symbols or 0 time units. That is, there is no guard interval in the current subframe.

Further, when the subframe structure of the first subframe is one of the first subframe structure, the second subframe structure, the third subframe structure, or the fourth subframe structure, the subframe structure of the first subframe The data symbol is further included, wherein the cyclic prefix of the data symbol is an extended cyclic prefix; or the subframe structure of the first subframe further includes a data symbol, wherein a cyclic prefix of the first data symbol in the first subframe is Lengthened cyclic prefix. Specifically, the extended cyclic prefix means that the length of the cyclic prefix is greater than the first communication device. The length of the cyclic prefix of the data symbols contained in the subframe transmitted to the base station. For example, when the subframe structure of the first subframe is the fourth subframe structure, the first subframe may include 14 data symbols, where the cyclic prefix of the data symbol is a normal cyclic prefix, that is, the 0th and 7th data symbols. The cyclic prefix length is 160Ts, and the cyclic prefix length of other data symbols is 144Ts. In this case, the cyclic prefix length is equal to the length of the cyclic prefix of the data symbols contained in the subframe transmitted by the first communication device to the base station. When the subframe structure of the first subframe is the fourth subframe structure, the first subframe may also include 13 data symbols, where the cyclic prefix of the data symbol is an extended cyclic prefix, that is, the loop length of the 0th data symbol is 448Ts, the other data symbols have a cyclic prefix length of 304Ts.

It should be noted that the foregoing time unit may be time sampling, for example, the time unit may be ^=1/(15000 x 2048) seconds specified in the LTE protocol; the foregoing symbol may be an orthogonal frequency division multiple access OFDMA symbol or a single Carrier frequency division multiple access to SC-FDMA symbols.

The second communication device determines the subframe structure of the first subframe that is sent by the first communications device, and receives the first subframe according to the subframe structure of the first subframe, where the second communications device is configured according to the subframe structure. Recognizing that the first subframe includes the guard interval, the signal of the location of the guard interval in the first subframe is not received within the length of the guard interval, or if the second communications device identifies the first subframe according to the subframe structure The data signal is included in the frame, and the signal at the position of the data signal in the first subframe is received within the length of the data signal. Through the subframe structure of the first subframe, resources can be rationally utilized without widening the transmission efficiency of the system, and the adaptation range is wide. In addition, the four-seed frame structure can more fully utilize resources; when the cyclic prefix of the data symbol is an extended cyclic prefix, it can ensure that the effective data symbols are adapted to a larger transmission distance; the symbol can be more orthogonal frequency division. Address OFDMA The symbol or single carrier frequency division multiple access accesses the SC-FDMA symbol, so that the subframe structure of the first subframe is more applicable. widely.

Referring to FIG. 10, FIG. 10 is a flowchart of another embodiment of a method for receiving a device-to-device communication according to the present invention. The present embodiment is a flowchart of a signal receiving end, and the embodiment is basically the same as the embodiment of FIG. For the same place, please refer to FIG. 9 and the corresponding text description, except that step S601 includes two sub-steps, and the specific contents are as follows:

Step S601: The second communications device determines a subframe structure of the first subframe sent by the first communications device. Step S601 includes sub-step S601a and sub-step S601b, and the content is as follows:

Sub-step S601a: The second communication device receives the subframe configuration command sent by the base station or the first communication device.

If the base station has previously defined the subframe structure of the first subframe or the first communication device has determined the subframe structure of the first subframe, the base station or the first communication device sends a subframe configuration instruction to the second communication device, so that The second communication device receives the data signal of the first subframe according to the subframe configuration instruction.

Sub-step S601b: The second communication device determines the length of the guard interval in the subframe structure of the first subframe and the position of the guard interval in the first subframe according to the subframe configuration instruction, or the second communication device configures according to the subframe The instruction determines a length of the data signal in the subframe structure of the first subframe and a position of the data signal in the first subframe.

In addition, in step S601, in addition to determining the subframe structure of the first subframe sent by the first communications device by using the foregoing method, the subframe structure of the first subframe sent by the first communications device may be determined by the following method, that is, Determining, by the second communications device, the length of the guard interval and the guard interval in the subframe structure of the first subframe according to the transmission mode of the first subframe and the state of the one subframe before the first subframe and/or after the first subframe a position in the first subframe, or the second communication device determines the subframe of the first subframe according to the transmission mode of the first subframe and the state of the one subframe before the first subframe and/or after the first subframe The length of the data signal in the structure and the location of the data signal in the first sub-frame.

The transmission mode may be a D2D transmission mode (such as signal transmission between the UE and the UE), or a Relay transmission mode (such as signal transmission between the relay node and the relay node or between the relay node and the UE), or Non-D2D transmission mode non-Relay transmission mode (such as signal transmission between UE and base station or between relay node and base station).

Step S602: The second communications device receives the first subframe according to the subframe structure of the first subframe, where the length of the guard interval is determined if the second communications device identifies that the first subframe includes the guard interval according to the subframe structure. Within the range, the signal of the location of the guard interval in the first subframe is not received, or if the second communication device identifies that the data signal is included in the first subframe according to the subframe structure, the length of the data signal is received. The signal at the location of the data signal in a sub-frame.

The second communication device determines the subframe structure of the first subframe that is sent by the first communications device, and receives the first subframe according to the subframe structure of the first subframe, where the second communications device is configured according to the subframe structure. Recognizing that the first subframe includes the guard interval, the signal of the location of the guard interval in the first subframe is not received within the length of the guard interval, or if the second communications device identifies the first subframe according to the subframe structure The data signal is included in the frame, and the signal at the position of the data signal in the first subframe is received within the length of the data signal. Through the subframe structure of the first subframe, resources can be rationally utilized without widening the transmission efficiency of the system, and the range of adaptation is wide. In addition, by receiving the subframe configuration instruction, the second communication device can be made aware of the subframe structure of the first subframe, thereby facilitating reception of the data signal.

Referring to FIG. 11, FIG. 11 is a schematic structural diagram of an embodiment of a communication device according to the present invention. The present embodiment is a communication device at a signal transmitting end, and the communication device includes a determining module 101 and a first transmitting module 102.

It should be noted that the communication device of the present embodiment can perform the steps in FIGS. 1, 6, 7, and 8.

The determining module 101 is configured to determine a sending moment of the first subframe and a subframe structure of the first subframe, where The first subframe includes a guard interval, and the subframe structure of the first subframe includes a length of the guard interval and a position of the guard interval in the first subframe, or, in the first subframe, a data signal, the first subframe The subframe structure of the frame includes the length of the data signal and the position of the data signal in the first subframe.

The first subframe refers to a subframe that needs to be transmitted currently. The so-called frame structure refers to the specific arrangement of the positions of all time periods (such as: time slots) in a frame, so that the receiving end can identify their relative positions according to the specified time slot allocation, realizing time division multiplexing, usually in one frame. Includes information and overhead.

For example, LTE supports two different radio frame structures, namely Typel and Type2 frame structures, each with a frame length of 10 ms. The Typel frame structure is suitable for full-duplex and half-duplex FDD, and the Type2 frame structure is only applicable to TDD. A Typel frame consists of 20 0.5 ms long time slots, and two adjacent time slots form one subframe. The Type 2 frame is divided into two 5 ms wireless fields, each of which consists of 5 subframes of length 1 ms. Each of the above subframes includes 2N _symb symbols, each slot contains N _symb symbols, where each symbol includes a body part and a cyclic prefix, corresponding to a normal cyclic prefix, N _symb = 7, corresponding to an extended cyclic prefix, and N _symb = 6 .

The guard interval refers to a time period having a certain length and located in a subframe for converting a signal transmitting end from a receiving state to a transmitting state or a signal receiving end from a transmitting state to a receiving state in D2D communication. The subframe structure of the first subframe includes the length of the guard interval and the position of the guard interval in the first subframe. The length of the guard interval may determine the length of the slot of the guard interval, and the location of the guard interval may determine the specific location of the slot length in the subframe.

The data signal refers to a signal that the first communication device really needs to transmit and that the second communication device is expected to receive. Specifically, the data signal may be a discovery signal or a communication signal. The discovery signal is used by the second communication device to discover the first communication device, and the communication signal is used to transmit the communication information sent by the first communication device to the second communication device. The position of the data signal in the first subframe may determine the location at which the data signal is received. The length of the data signal may determine the range of data signals to be received or the number to receive. According to the length of the signal period. By determining the length of the data signal in the sub-frame structure and the position of the data signal in the first sub-frame, it is also ensured that the signal transmitting end is switched from the receiving state to the transmitting state or the signal receiving end is converted from the transmitting state to the receiving state.

The transmission timing of the first subframe may determine the transmission timing of the first subframe at the reference time or before the reference time or after the reference time according to the state and the specific case of the first subframe.

The subframe structure of the first subframe may specifically be the following subframe structure:

(1) The subframe structure of the first subframe is a first subframe structure, and the length of the guard interval in the first subframe structure is Mi symbols or M ₂ time units, and the position of the guard interval in the first subframe The tail of the first subframe, where a positive number, M ₂ is a positive integer; or, the length of the data signal in the first subframe structure is M ₃ symbols or M ₄ time units, and the data signal is in the first subframe The position in is the head of the first subframe, where ^/[ ₃ is a positive number and M ₄ is a positive integer.

At this time, when the subframe structure of the first subframe is the first subframe structure, the determining module 101 is configured to determine that the sending moment of the first subframe is one of the time units after the reference moment, where Ί is a positive integer.

(2) The subframe structure of the first subframe is a second subframe structure, and the length of the guard interval in the second subframe structure is a symbol or N ₂ time units, and the position of the guard interval in the first subframe is a header of a subframe, where ^ is a positive number and N ₂ is a positive integer; or, the length of the data signal in the second subframe structure is N ₃ symbols or N ₄ time units, and the data signal is in the first subframe The position in is the end of the first subframe Where N ₃ is a positive number and N ₄ is a positive integer.

At this time, when the subframe structure of the first subframe is the second subframe structure, the determining module 101 is configured to determine that the sending time of the first subframe is T ₂ time units before the reference time, where Τ ₂ is a positive integer. .

(3) The subframe structure of the first subframe is a third subframe structure, and the length of the guard interval in the third subframe structure is a symbol or K ₂ time units, and the position of the guard interval in the first subframe is a header and a tail of a subframe, where ^ is a positive number, Κ ₂ is a positive integer; or, the length of the data signal in the third subframe structure is Κ ₃ symbols or time units, and the data signal is in the first subframe The position in is the middle of the first subframe, where Κ ₃ is a positive number and Κ ₄ is a positive integer. The third subframe structure is suitable for a single carrier system.

Sub-frame structure in the first subframe is a subframe structure in the third or fourth sub-frame configuration, transmission time determining module 101 first subframe is used to determine the reference time, the reference time point before or Τ _three time units , or 参考₄ time units after the reference time, where Τ ₃ and Τ ₄ are positive integers.

When the subframe structure of the first subframe is one of the first subframe structure, the second subframe structure, the third subframe structure, or the fourth subframe structure, the subframe structure of the first subframe is It also contains data symbols, where the cyclic prefix of the data symbols is an extended cyclic prefix. Alternatively, the subframe structure of the first subframe further includes a data symbol, wherein a cyclic prefix of the first data symbol in the first subframe is an extended cyclic prefix. Specifically, the extended cyclic prefix means that the length of the cyclic prefix is greater than the length of the cyclic prefix of the data symbol contained in the subframe transmitted by the first communication device to the base station.

Further, when the subframe structure of the first subframe is the first subframe structure, the second subframe structure, or the third subframe structure, the length of the guard interval is greater than or equal to the transceiving conversion time requirement and is smaller than the transceiving conversion time requirement. Twice, or the length of the guard interval is greater than or equal to twice the demand for the transceiving conversion time. Specifically, when the subframe structure of the first subframe is the first subframe structure, the second subframe structure, or the third subframe structure, Μ ₂ or Ν ₂ or Κ _{2 is} greater than or equal to 624 and less than 1248, or Μ ₂ Or Ν ₂ or Κ _{2 is} greater than or equal to 1248.

For example, in an LTE system, the duration of a data symbol with a normal cyclic prefix is generally 2192Ts, the guard interval length in the first subframe structure is 1360Ts (more than the transceiving conversion requirement: 1248Ts), and the valid data symbols are 13, wherein the CP length of each data symbol can be increased by 64Ts. Further, in order to ensure that the UE receiving the current first subframe can perform adaptive gain control (AGC) by using the CP of the first data symbol, the CP of the first data symbol is an extended CP, for example, the first data symbol. The CP increases by 832Ts, and the guard interval length is 1360Ts. Alternatively, the CP of the first data symbol can be increased more than other data symbols. For example, the CP of the first data symbol is increased by 128Ts, and the CP length of each other data symbol. Increase 64Ts, the guard interval length is 1296Ts.

It should be noted that the foregoing time unit is time sampling, and the foregoing symbols are orthogonal frequency division multiple access OFDMA symbols or single carrier frequency division multiple access (SC-FDMA) symbols.

The first sending module 102 is configured to send the first subframe to the second communications device according to the subframe structure of the first subframe at the sending moment of the first subframe determined by the determining module 101.

When the sending time of the first subframe arrives, the first sending module 102 may send the first subframe to the second communications device according to the subframe structure of the first subframe, so that the second communications device may receive the sending by the communications device. The first subframe.

The embodiment of the present invention determines the transmission time of the first subframe and the subframe structure of the first subframe, where the first subframe includes a guard interval, and the subframe structure of the first subframe includes the length and protection of the guard interval. Interval at a position in the first subframe, or a data signal in the first subframe, a length of the subframe structure data signal of the first subframe, and a position of the data signal in the first subframe; in the first subframe At the time of transmission, the first subframe is transmitted to the second communication device according to the subframe structure of the first subframe. By combining the transmission timing of the first subframe and the subframe structure of the first subframe, it is possible to rationally utilize resources without widening the transmission efficiency of the system, and the adaptation range is wide. In addition, the four-seed frame structure and the transmission timing of the respective first sub-frames can utilize resources more fully and reasonably; when the cyclic prefix of the data symbols is an extended cyclic prefix, the effective data symbols can be guaranteed to adapt to a larger transmission distance. And satisfying the requirement of the guard interval; the symbol may be an orthogonal frequency division multiple access OFDMA symbol or a single carrier frequency division multiple access SC-FDMA symbol, so that the subframe structure of the first subframe is more widely applicable.

Referring to FIG. 12, FIG. 12 is a schematic structural diagram of another embodiment of a communication device according to the present invention. The present embodiment is basically the same as the embodiment of FIG. 11 . The same place is shown in FIG. 12 and the corresponding text description. The difference is that the determining module 201 includes three units, and the specific differences may be See the description below. The communication device includes: a determination module 201 and a first transmission module 202.

It should be noted that the communication device of the present embodiment can perform the steps in FIG. 6.

The determining module 201 is configured to determine a sending moment of the first subframe and a subframe structure of the first subframe, where the first subframe includes a guard interval, and the subframe structure of the first subframe includes a length of the guard interval and protection The position is in the first subframe, or the first subframe includes a data signal, and the subframe structure of the first subframe includes the length of the data signal and the position of the data signal in the first subframe.

The determining module 201 includes: a receiving unit 2011, a first determining unit 2012, and a second determining unit 2013.

The receiving unit 2011 is configured to receive a subframe configuration instruction sent by the base station.

The base station pre-defines the length of the guard interval in the subframe structure of the subframe and the position of the guard interval in the subframe or the length of the data signal in the predefined subframe structure and the position of the data signal in the subframe, and defines the first At the time of sending the subframe, the base station sends the subframe structure of the predefined subframe and the sending moment of the first subframe to the communication device in the form of a subframe configuration instruction, where the subframe configuration command may be high layer signaling or dynamic. Signaling.

The first determining unit 2012 is configured to determine, according to the subframe configuration instruction received by the receiving unit 2011, the length of the guard interval in the subframe structure of the first subframe and the position of the guard interval in the first subframe, or the first determining unit 2012 is configured to determine a length of a data signal in a subframe structure of the first subframe and a position of the data signal in the first subframe according to the subframe configuration instruction received by the receiving unit 2011.

The second determining unit 2013 is configured to determine a transmission moment of the first subframe according to the subframe configuration instruction received by the receiving unit 2011.

Further, if the base station pre-defines the length of the cyclic prefix of the data symbol in the subframe, the communication device may also determine the length of the cyclic prefix of the data symbol of the first subframe according to the subframe configuration instruction. The first sending module 202 is configured to send the first subframe to the second communications device according to the subframe structure of the first subframe in the sending moment of the first subframe determined by the determining module 201.

The embodiment of the present invention determines the transmission time of the first subframe and the subframe structure of the first subframe, where the first subframe includes a guard interval, and the subframe structure of the first subframe includes the length and protection of the guard interval. Interval at a position in the first subframe, or a data signal in the first subframe, a length of the subframe structure data signal of the first subframe, and a position of the data signal in the first subframe; in the first subframe At the time of transmission, the first subframe is transmitted to the second communication device according to the subframe structure of the first subframe. By combining the transmission timing of the first subframe and the subframe structure of the first subframe, it is possible to rationally utilize resources without widening the transmission efficiency of the system, and the adaptation range is wide. In addition, the base station can reasonably control the utilization of resources by transmitting a subframe configuration command.

Referring to FIG. 13, FIG. 13 is a schematic structural diagram of still another embodiment of a communication device according to the present invention. The present embodiment is a communication device at a signal transmitting end. The present embodiment is basically the same as the embodiment of FIG. 11. For the same place, refer to FIG. 11 and corresponding The text description differs in that the determination module 301 includes two units, and the specific differences are as follows. The communication device includes: a determination module 301 and a first transmission module 302.

It should be noted that the communication device of the present embodiment can perform the steps in FIG.

The determining module 301 is configured to determine a sending moment of the first subframe and a subframe structure of the first subframe, where the first subframe includes a guard interval, and the subframe structure of the first subframe includes a length of the guard interval and protection The position is in the first subframe, or the first subframe includes a data signal, and the subframe structure of the first subframe includes the length of the data signal and the position of the data signal in the first subframe.

The determination module 301 includes a third determination unit 3011 and a fourth determination unit 3012.

The third determining unit 3011 is configured to determine, according to a transmission mode of the first subframe, a state of the guard interval in the subframe structure of the first subframe, and a state of one subframe after the first subframe and/or after the first subframe. The third determining unit 3011 is configured to determine, according to the transmission mode of the first subframe and the state of one subframe after the first subframe and/or after the first subframe. The length of the data signal in the subframe structure of a sub-frame and the position of the data signal in the first sub-frame. The transmission mode may be a D2D transmission mode (such as signal transmission between the UE and the UE), or a Relay transmission mode (such as signal transmission between the relay node and the relay node or between the relay node and the UE), or non-D2D transmission. Mode non-Relay transmission mode (such as signal transmission between UE and base station or between relay node and base station).

Specifically, if the previous subframe of the first subframe is a subframe that can send data to the base station, and the transmission mode of the first subframe is a D2D transmission mode or a Relay transmission mode, determining that the first subframe is the second subframe structure If the subframe after the first subframe is a subframe in which data can be transmitted to the base station or a subframe in which data is received or the first subframe is the last subframe in which the data is transmitted, the transmission mode of the first subframe is D2D transmission. Mode or Relay transmission mode, then determining that the first subframe is the first subframe structure; if the first subframe of the first subframe is a subframe that can send data to the base station, and one subframe after the first subframe is a subframe in which the base station transmits data, where the transmission mode of the first subframe is a D2D transmission mode or a Relay transmission mode, then determining that the first subframe is a third subframe structure; if the first subframe of the first subframe is a second communication The device sends a subframe of data, and the subframe after the first subframe is a subframe that sends data to the second communication device, and the transmission mode of the first subframe is a D2D transmission mode or a Relay transmission mode. Then, the first subframe is determined to be the fourth subframe structure.

The fourth determining unit 3012 is configured to determine a transmission moment of the first subframe according to a transmission mode of the first subframe and a state of one subframe before the first subframe and/or after the first subframe.

For example, the transmission time is determined as the reference time according to the transmission mode of the first subframe and the state of the first subframe and/or the subframe after the first subframe, that is, the transmission time is a reference regardless of the subframe structure. time. This ensures that when there are other UEs or relay nodes on the first subframe, the number is sent to the base station. According to the time, the data symbols transmitted to the base station may be aligned in the time domain with the data symbols transmitted by the first communication device in the current first subframe, thereby reducing interference between symbols.

The first sending module 302 is configured to send the first subframe to the second communications device according to the subframe structure of the first subframe at the sending moment of the first subframe determined by the determining module 301.

The embodiment of the present invention determines the transmission time of the first subframe and the subframe structure of the first subframe, where the first subframe includes a guard interval, and the subframe structure of the first subframe includes the length and protection of the guard interval. Interval at a position in the first subframe, or a data signal in the first subframe, a length of the subframe structure data signal of the first subframe, and a position of the data signal in the first subframe; in the first subframe At the time of transmission, the first subframe is transmitted to the second communication device according to the subframe structure of the first subframe. By combining the transmission timing of the first subframe and the subframe structure of the first subframe, it is possible to rationally utilize resources without widening the transmission efficiency of the system, and the adaptation range is wide. In addition, determining a subframe structure of the first subframe and a sending moment of the first subframe according to a transmission mode of the first subframe and a state of one subframe before the first subframe and/or after the first subframe, according to In a specific case, the subframe structure of the first subframe and the transmission timing of the first subframe are flexibly changed, thereby rationally utilizing resources, and the adaptation range is wide.

Referring to FIG. 14, FIG. 14 is a schematic structural diagram of still another embodiment of a communication device according to the present invention. The present embodiment is a communication device at a signal transmitting end. This embodiment is basically the same as the embodiment of FIG. 11. For the same place, refer to FIG. 11 and corresponding The text description is different. The difference is that the embodiment further includes a second sending module 403. For details, please refer to the following content. The communication device includes: a determination module 401, a first transmission module 402, and a second transmission module 403.

The determining module 401 is configured to determine a sending moment of the first subframe and a subframe structure of the first subframe, where the first subframe includes a guard interval, and the subframe structure of the first subframe includes a length of the guard interval and protection The position is in the first subframe, or the first subframe includes a data signal, and the subframe structure of the first subframe includes the length of the data signal and the position of the data signal in the first subframe.

The first sending module 402 is configured to send the first subframe to the second communications device according to the subframe structure of the first subframe in the sending moment of the first subframe determined by the determining module 401. The second sending module 403 is configured to send a subframe configuration instruction of the first subframe to the second communications device. The embodiment of the present invention determines the transmission time of the first subframe and the subframe structure of the first subframe, where the first subframe includes a guard interval, and the subframe structure of the first subframe includes the length and protection of the guard interval. Interval at a position in the first subframe, or a data signal in the first subframe, a length of the subframe structure data signal of the first subframe, and a position of the data signal in the first subframe; in the first subframe At the time of transmission, the first subframe is transmitted to the second communication device according to the subframe structure of the first subframe. By combining the transmission time of the first subframe and the subframe structure of the first subframe, resources can be rationally utilized without widening the transmission efficiency of the system, and the adaptation range is wide.

Referring to FIG. 15, FIG. 15 is a schematic structural diagram of still another embodiment of a communication device according to the present invention. The present embodiment is a communication device at a signal receiving end, and the communication device includes: a determining module 501 and a receiving module 502.

The determining module 501 is configured to determine a subframe structure of the first subframe sent by the first communications device.

The receiving module 502 is configured to receive the first subframe according to the subframe structure of the first subframe determined by the determining module 501, where the receiving module 502 identifies that the guard interval is included in the first subframe according to the subframe structure, and the guard interval Within the length range, the signal of the position of the guard interval in the first subframe is not received, or when the receiving module 502 recognizes that the data signal is included in the first subframe according to the subframe structure, receiving within the length of the data signal The signal at the location of the data signal in the first sub-frame.

The data signal refers to a signal that the first communication device really needs to transmit and that the second communication device is expected to receive. Specifically, the data signal may be a discovery signal or a communication signal. The discovery signal is used by the second communication device to discover the first communication device, and the communication signal is used to transmit the communication information sent by the first communication device to the second communication device. The position of the data signal in the first sub-frame can determine the location at which the data signal is received. The length of the data signal can determine the extent of the data signal to be received or the length of the time period of the data signal to be received. The subframe structure of the first subframe includes a length of the data signal and a position of the data signal in the first subframe, so that the second communication device can determine the data signal to be received according to the subframe structure of the first subframe. The location and the extent of the data signal that needs to be received or the length of the time period. By determining the length of the data signal in the sub-frame structure and the position of the data signal in the first sub-frame, it is also ensured that the signal transmitting end is switched from the receiving state to the transmitting state or the signal receiving end is switched from the transmitting state to the receiving state. Therefore, the second communication device receives the signal at the location of the data signal in the first sub-frame within the length of the data signal.

(1) The subframe structure of the first subframe is a first subframe structure, and the length of the guard interval in the first subframe structure is Mi symbols or M ₂ time units, and the position of the guard interval in the first subframe a tail of the first subframe, where the positive value, the M ₂ is a positive integer, or the length of the data signal in the first subframe structure is M ₃ symbols or M ₄ time units, and the data signal is The position in the first subframe is the head of the first subframe, where M ₃ is a positive number and M ₄ is a positive integer. For example, the protection room in the first subframe The interval is the last symbol in the first subframe, or the data signal in the first subframe is the first 13 symbols in the first subframe.

(2) The subframe structure of the first subframe is a second subframe structure, and the length of the guard interval in the second subframe structure is a symbol or N ₂ time units, and the position of the guard interval in the first subframe is a header of a subframe, where the ^ is a positive number, and the N ₂ is a positive integer; or, the length of the data signal in the second subframe structure is N ₃ symbols or N ₄ time units, and the data signal is The position in the first subframe is the tail of the first subframe, where N ₃ is a positive number and N ₄ is a positive integer. For example, the guard interval in the first subframe is the first symbol in the first subframe, or the data signal in the first subframe is the last 13 symbols in the first subframe.

(3) The subframe structure of the first subframe is a third subframe structure, and the length of the guard interval in the third subframe structure is a symbol or K ₂ time units, and the position of the guard interval in the first subframe is The head and tail of a sub-frame, where ^ is a positive number, Κ ₂ is a positive integer; or, the length of the data signal in the third sub-frame structure is Κ ₃ symbols or Κ ₄ time units, and the data signal is at first The position in the subframe is the middle of the first subframe, where Κ ₃ is a positive number and is a positive integer. For example, the guard interval in the first subframe is a part of the first symbol in the first subframe and a part of the last symbol, or the data signal in the first subframe is the first symbol in the first subframe. Part of the first part of the last symbol, that is, in the middle of the first sub-frame.

Further, when the subframe structure of the first subframe is one of the first subframe structure, the second subframe structure, the third subframe structure, or the fourth subframe structure, the subframe structure of the first subframe The data symbol is further included, wherein the cyclic prefix of the data symbol is an extended cyclic prefix; or the subframe structure of the first subframe further includes a data symbol, wherein a cyclic prefix of the first data symbol in the first subframe is Lengthened cyclic prefix. Specifically, the extended cyclic prefix means that the length of the cyclic prefix is greater than the length of the cyclic prefix of the data symbol contained in the subframe transmitted by the first communication device to the base station.

Further, when the subframe structure of the first subframe is the first subframe structure, the second subframe structure, or the third subframe structure, the length of the guard interval is greater than or equal to the transmission and reception conversion time requirement and is smaller than the transmission and reception. The time requirement is twice, or the length of the guard interval is greater than or equal to twice the demand for the transceiving conversion time. Specifically, when the subframe structure of the first subframe is the first subframe structure, the second subframe structure, or the third subframe structure, M ₂ or N ₂ or K _{2 is} greater than or equal to 624 and less than 1248, or Μ ₂ Or Ν ₂ or Κ _{2 is} greater than or equal to 1248.

The second communication device determines the subframe structure of the first subframe that is sent by the first communications device, and receives the first subframe according to the subframe structure of the first subframe, where the second communications device is configured according to the subframe structure. Recognizing that the first subframe includes the guard interval, the signal of the location of the guard interval in the first subframe is not received within the length of the guard interval, or if the second communications device identifies the first subframe according to the subframe structure The data signal is included in the frame, and the signal at the position of the data signal in the first subframe is received within the length of the data signal. Through the subframe structure of the first subframe, resources can be rationally utilized without widening the transmission efficiency of the system, and the range of adaptation is wide. In addition, the four-seed frame structure can more fully utilize resources; when the cyclic prefix of the data symbol is an extended cyclic prefix, it can ensure that the effective data symbols are adapted to a larger transmission distance; the symbol can be more orthogonal frequency division. The OFDMA symbol or the single carrier frequency division multiple access SC-FDMA symbol makes the subframe structure of the first subframe more applicable. widely.

Referring to FIG. 16, FIG. 16 is a schematic structural diagram of still another embodiment of a communication device according to the present invention. The present embodiment is a communication device at a signal receiving end. The embodiment is basically the same as the embodiment of FIG. 15. For the same place, refer to FIG. 15 and corresponding The text description differs in that the determination module 602 includes two units, and the specific differences are as follows. The communication device includes: a determination module 601 and a reception module 602.

The determining module 601 is configured to determine a subframe structure of the first subframe sent by the first communications device.

The determining module 601 includes: a receiving unit 6011 and a determining unit 6012.

The receiving unit 6011 is configured to receive a subframe configuration instruction sent by the base station or the first communications device. If the base station has previously defined the subframe structure of the first subframe or the first communication device has determined the subframe structure of the first subframe, the base station or the first communication device sends a subframe configuration instruction to the second communication device, so that The second communication device receives the data signal of the first subframe according to the subframe configuration instruction.

The determining unit 6012 is configured to determine, according to the subframe configuration instruction received by the receiving unit 6011, the length of the guard interval in the subframe structure of the first subframe and the position of the guard interval in the first subframe, or the determining unit 6012 is configured to use according to The subframe configuration instruction received by the receiving unit 6011 determines the length of the data signal in the subframe structure of the first subframe and the position of the data signal in the first subframe.

It should be noted that, in other implementation manners, when determining a subframe structure of the first subframe that is sent by the first communications device, the determining module 601 is further configured to use, according to the transmission mode of the first subframe and the first subframe. Or the state of one subframe after the first subframe determines the length of the guard interval in the subframe structure of the first subframe and the position of the guard interval in the first subframe, or the determining module is specifically used according to the first subframe The transmission mode of the frame and the state of one subframe before the first subframe and/or after the first subframe determine the length of the data signal in the subframe structure of the first subframe and the position of the data signal in the first subframe.

The receiving module 602 is configured to receive the first subframe according to the subframe structure of the first subframe determined by the determining module 601, where the receiving module 602 identifies that the first subframe includes the guard interval according to the subframe structure, and the guard interval Within the length range, the signal of the position of the guard interval in the first subframe is not received, or when the receiving module 602 recognizes that the data signal is included in the first subframe according to the subframe structure, receiving within the length of the data signal The signal at the location of the data signal in the first sub-frame.

The second communication device determines the subframe structure of the first subframe that is sent by the first communications device, and receives the first subframe according to the subframe structure of the first subframe, where the second communications device is configured according to the subframe structure. Recognizing that the first subframe includes the guard interval, the signal of the location of the guard interval in the first subframe is not received within the length of the guard interval, or if the second communications device identifies the first subframe according to the subframe structure The data signal is included in the frame, and the signal at the position of the data signal in the first subframe is received within the length of the data signal. Through the subframe structure of the first subframe, resources can be rationally utilized without widening the transmission efficiency of the system, and the adaptation range is wide. In addition, by receiving the subframe configuration instruction, the second communication device can be made aware of the subframe structure of the first subframe, thereby facilitating reception of data or signals. Referring to FIG. 17, FIG. 17 is a block diagram showing an embodiment of a transmitting apparatus for signal-to-device communication according to the present invention. The apparatus includes: a processor 41, a memory 42 coupled to the processor 41, and a transmitter 43.

The processor 41 is configured to determine a sending moment of the first subframe and a subframe structure of the first subframe, where the first subframe includes a guard interval, and the subframe structure of the first subframe includes The length of the guard interval and the position of the guard interval in the first subframe, or, in the first subframe, the data signal, the subframe structure of the first subframe includes the length of the data signal and the data signal The position in the first sub-frame.

The memory 42 is configured to store a transmission moment of the first subframe determined by the processor 41 and a subframe structure of the first subframe.

The processor 41 is configured to control, by the sending moment of the first subframe, the transmitter 43 to send the first subframe to a second communications device according to a subframe structure of the first subframe.

The subframe structure of the first subframe is dynamic, and the subframe structure of the first subframe is dynamic, that is, the subframe structure of any two adjacent first subframes may be different. of.

The subframe structure of the first subframe is a first subframe structure, and the length of the guard interval in the first subframe structure is ^ symbols or M ₂ time units, and the guard interval is in the The position in the first subframe is the tail of the first subframe, where the positive number, the M ₂ is a positive integer; or the length of the data signal in the first subframe structure is M ₃ a symbol or M ₄ time units, the position of the data signal in the first subframe is a header of the first subframe, wherein the M ₃ is a positive number, and the M ₄ is a positive integer.

The processor 41 is further configured to: when the subframe structure of the first subframe is the first subframe structure, determine that the sending time of the first subframe is one time unit after the reference time, where T is a positive integer.

The subframe structure of the first subframe is a second subframe structure, and the length of the guard interval in the second subframe structure is a symbol or N ₂ time units, and the guard interval is at the first The position in the subframe is the head of the first subframe, wherein the ^ is a positive number, and the N ₂ is a positive integer; or, The length of the data signal in the second subframe structure is N ₃ symbols or N ₄ time units, and the position of the data signal in the first subframe is the tail of the first subframe, where , the is a positive number, and the N ₄ is a positive integer.

The processor is further configured to: when the subframe structure of the first subframe is the second subframe structure, determine that the sending time of the first subframe is T ₂ time units before the reference time, where Τ ₂ is a positive integer.

The subframe structure of the first subframe is a third subframe structure, and the length of the guard interval in the third subframe structure is a symbol or Κ ₂ time units, and the guard interval is at the first The position in the subframe is the head and the tail of the first subframe, wherein the ^ is a positive number, and the Κ ₂ is a positive integer; or the length of the data signal in the third subframe structure is Κ ₃ symbols or Κ ₄ time units, the position of the data signal in the first subframe is the middle of the first subframe, wherein the value is a positive number, and the Κ ₄ is a positive integer.

The subframe structure of the first subframe is a fourth subframe structure, and the length of the guard interval in the fourth subframe structure is 0 symbols or 0 time units.

The processor 41 is further configured to: when the subframe structure of the first subframe is the third subframe structure or the fourth subframe structure, determine that the sending moment of the first subframe is a reference time, or a reference time Τ ₄ time units before and after the Τ ₃ time units, or a reference time, wherein the Τ ₄ Τ ₃ and are positive integers.

When the subframe structure of the first subframe is one of the first subframe structure, the second subframe structure, the third subframe structure, or the fourth subframe structure, the subframe of the first subframe The data symbol is further included in the structure, wherein the cyclic prefix of the data symbol is an extended cyclic prefix; or the subframe structure of the first subframe further includes a data symbol, where the first one of the first subframes The cyclic prefix of the data symbols is an extended cyclic prefix. Specifically, the extended cyclic prefix means that the length of the cyclic prefix is greater than the length of a cyclic prefix of a data symbol included in a subframe transmitted by the first communications device to the base station.

When the subframe structure of the first subframe is the first subframe structure, the second subframe structure, or the third subframe structure, the length of the guard interval is greater than or equal to the transceiving conversion time requirement and is smaller than the transceiving conversion time. Two times the demand, or the length of the guard interval is greater than or equal to twice the demand for the transceiving conversion time. Specifically, when the subframe structure of the first subframe is the first subframe structure, the second subframe structure, or the third subframe structure, M ₂ or N ₂ or K _{2 is} greater than or equal to 624 and less than 1248, or Μ ₂ Or Ν ₂ or Κ _{2 is} greater than or equal to 1248.

The time unit is a time sample, and the symbol is an orthogonal frequency division multiple access OFDMA symbol or a single carrier frequency division multiple access SC-FDMA symbol.

The device also includes a receiver 44.

The processor 41 controls the receiver 44 to receive a subframe configuration instruction sent by the base station, and stores the subframe configuration instruction in the memory 42.

The processor 41 retrieves a subframe configuration instruction stored in the memory 42, and determines, according to the subframe configuration instruction, a length of a guard interval and a guard interval in a subframe structure of the first subframe. Determining a position in the first subframe, or the processor 41 determines, according to the subframe configuration instruction, a length of the data signal in the subframe structure of the first subframe and the data signal in the first a position in the subframe; determining a transmission timing of the first subframe according to the subframe configuration instruction.

The processor 41 is further configured to determine, according to a transmission mode of the first subframe, a state of the guard interval in the subframe structure of the first subframe, and a state of one subframe before the first subframe and/or after the first subframe. And the location of the guard interval in the first subframe, or the processor 41 according to a transmission mode of the first subframe and a subframe before the first subframe and/or after the first subframe State determining a length of a data signal in a subframe structure of the first subframe and a position of the data signal in the first subframe; according to a transmission mode of the first subframe and before and/or first of the first subframe The state of one subframe after the subframe determines the transmission timing of the first subframe.

The transmitter 43 is further configured to send a subframe configuration instruction of the first subframe to the second communications device. The apparatus according to the embodiment of the present invention determines the transmission time of the first subframe and the subframe structure of the first subframe, where the first subframe includes a guard interval, and the subframe structure of the first subframe includes the length and protection of the guard interval. Interval at a position in the first subframe, or a data signal in the first subframe, a length of the subframe structure data signal of the first subframe, and a position of the data signal in the first subframe; in the first subframe When sending And transmitting, by the subframe structure of the first subframe, the first subframe to the second communications device. By combining the transmission time of the first subframe and the subframe structure of the first subframe, resources can be rationally utilized without widening the transmission efficiency of the system, and the adaptation range is wide. In addition, the four-seed frame structure and the transmission timing of the respective first sub-frames can utilize resources more fully and reasonably; when the cyclic prefix of the data symbols is an extended cyclic prefix, the effective data symbols can be guaranteed to adapt to a larger transmission distance. And satisfying the requirement of the guard interval; the symbol may be an orthogonal frequency division multiple access OFDMA symbol or a single carrier frequency division multiple access SC-FDMA symbol, so that the subframe structure of the first subframe is more widely applicable.

Referring to FIG. 18, FIG. 18 is a block diagram showing an embodiment of a receiving apparatus for signal-to-device communication of the present invention. The apparatus includes: a processor 51, a memory 52 coupled to the processor 51, and a receiver 53.

The receiver 53 is configured to receive a first subframe sent by the first communications device.

The memory 52 is used to store the received first subframe.

The processor 51 is configured to retrieve a first subframe stored by the memory 52, and determine a subframe structure of the first subframe sent by the first communications device.

The processor 51 is further configured to: when the protection interval is included in the first subframe according to the subframe structure, control the receiver 53 not to receive the first time within a length of the guard interval a signal of a location of the guard interval in a subframe, or the processor 51 is further configured to: when the data signal is included in the first subframe according to the subframe structure, in the data signal Within the length range, the receiver 53 is controlled to receive a signal of the location of the data signal in the first subframe, and the received signal is stored in the memory 52.

The subframe structure of the first subframe is a first subframe structure, and the length of the guard interval in the first subframe structure is ^ symbols or M ₂ time units, and the guard interval is in the The position in the first subframe is the tail of the first subframe, where the positive number, the M ₂ is a positive integer; or the length of the data signal in the first subframe structure is M ₃ Symbol or M ₄ time units, The position of the data signal in the first subframe is a header of the first subframe, where the M ₃ is a positive number, and the M ₄ is a positive integer.

The subframe structure of the first subframe is a second subframe structure, and the length of the guard interval in the second subframe structure is a symbol or N ₂ time units, and the guard interval is at the first The position in the subframe is the header of the first subframe, where the ^ is a positive number, and the N ₂ is a positive integer; or the length of the data signal in the second subframe structure is N ₃ a symbol or N ₄ time units, the position of the data signal in the first subframe being the tail of the first subframe, wherein the N ₃ is a positive number, and the N ₄ is a positive integer.

The subframe structure of the first subframe is a third subframe structure, and the length of the guard interval in the third subframe structure is a symbol or K ₂ time units, and the guard interval is at the first The position in the subframe is the head and the tail of the first subframe, wherein the ^ is a positive number, and the Κ ₂ is a positive integer; or the length of the data signal in the third subframe structure is Κ ₃ symbols or Κ ₄ time units, the position of the data signal in the first subframe is the middle of the first subframe, wherein the value is a positive number, and the Κ ₄ is a positive integer.

The subframe structure of the first subframe further includes a data symbol, where a cyclic prefix of the data symbol is an extended cyclic prefix.

The subframe structure of the first subframe further includes a data symbol, wherein a cyclic prefix of the first data symbol in the first subframe is an extended cyclic prefix.

The lengthened cyclic prefix means that the length of the cyclic prefix is greater than the length of a cyclic prefix of a data symbol included in a subframe transmitted by the first communications device to the base station.

When the subframe structure of the first subframe is the first subframe structure, the second subframe structure, or the third subframe structure, the length of the guard interval is greater than or equal to the transceiving conversion time requirement and is smaller than the transceiving conversion time requirement. Twice, or the length of the guard interval is greater than or equal to twice the demand for the transceiving conversion time. Specifically, the subframe structure of the first subframe is a first subframe structure, a second subframe structure, or a third subframe. In the frame structure, M ₂ or N ₂ or K _{2 is} greater than or equal to 624 and less than 1248, or Μ ₂ or Ν ₂ or Κ _{2 is} greater than or equal to 1248.

The processor 51 is further configured to control the receiver 53 to receive a subframe configuration instruction sent by the base station or the first communication device, and save the subframe configuration instruction in the memory 52; Taking the subframe configuration instruction saved by the memory 52, determining, according to the subframe configuration instruction, a length of a guard interval in a subframe structure of the first subframe and the guard interval in the first subframe. Or the processor 51 determines, according to the subframe configuration instruction, a length of a data signal in a subframe structure of the first subframe and a location of the data signal in the first subframe. .

The processor 51 is further configured to determine, according to a transmission mode of the first subframe, a state of the guard interval in the subframe structure of the first subframe, and a state of one subframe after the first subframe and/or after the first subframe. And the location of the guard interval in the first subframe, or the processor 51 is further configured to: according to a transmission mode of the first subframe and one of the first subframe and/or the first subframe The state of the subframe determines the length of the data signal in the subframe structure of the first subframe and the location of the data signal in the first subframe.

The embodiment of the present invention first determines a subframe structure of the first subframe that is sent by the first communications device, and receives the first subframe according to the subframe structure of the first subframe, where the first subframe is identified according to the subframe structure. Including the guard interval, the signal of the position of the guard interval in the first subframe is not received within the length of the guard interval, or, if the data signal is included in the first subframe according to the subframe structure, the data signal is Within the length range, the signal at the location of the data signal in the first sub-frame is received. Through the subframe structure of the first sub-frame, resources can be rationally utilized without widening the transmission efficiency of the system, and the adaptation range is wide. In addition, the four-seed frame structure can utilize resources more fully and reasonably; when the cyclic prefix of the data symbols is an extended cyclic prefix, it can ensure that valid data symbols are adapted to a larger transmission distance; the symbols can be orthogonal frequency divisions. The OFDMA symbol or the single carrier frequency division multiple access access SC-FDMA symbol makes the subframe structure of the first subframe more applicable.

In the several embodiments provided by the present invention, it should be understood that the disclosed system, device and The method can be implemented in other ways. For example, the device implementations described above are merely illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be used. Combined or can be integrated into another system, or some features can be ignored, or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.

The units described as separate components may or may not be physically separate, and the components displayed as the units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the embodiments of the present embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may contribute to the prior art or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium. The instructions include a plurality of instructions for causing a computer device (which may be a personal computer, a server, or a partial step. The foregoing storage medium includes: a USB flash drive, a removable hard disk, a read-only memory (ROM), a random access memory A medium that can store program code, such as a memory (RAM, Random Access Memory), a disk or an optical disk.

The above description is only the embodiment of the present invention, and is not intended to limit the scope of the invention, and the equivalent structure or equivalent process transformation using the specification and the drawings of the present invention may be directly or indirectly applied to other related technologies. The scope of the invention is included in the scope of patent protection of the present invention.

Claims

Rights request

A method for transmitting a signal for device-to-device communication, comprising: determining, by a first communication device, a transmission time of a first subframe and a subframe structure of the first subframe, where The first subframe includes a guard interval, and the subframe structure of the first subframe includes a length of the guard interval and a position of the guard interval in the first subframe, or the first sub-frame a frame, including a data signal, the subframe structure of the first subframe includes a length of the data signal and a position of the data signal in the first subframe;

And transmitting, by the first communications device, the first subframe to the second communications device according to the subframe structure of the first subframe in a sending moment of the first subframe.

2. The method of claim 1 wherein

The subframe structure of the first subframe is dynamic, and the subframe structure of the first subframe is dynamic, and the subframe structure of any two adjacent first subframes may be different.

The method according to claim 1 or 2, wherein the subframe structure of the first subframe is a first subframe structure, and the length of the guard interval in the first subframe structure is a symbol or M ₂ time units, the position of the guard interval in the first subframe is the tail of the first subframe, where the positive number, the M ₂ is a positive integer;

Or the length of the data signal in the first subframe structure is M ₃ symbols or M ₄ time units, and the position of the data signal in the first subframe is the header of the first subframe. And wherein the ^1 ₃ is a positive number, and the M ₄ is a positive integer.

The method according to claim 3, wherein the determining, by the first communications device, the sending moment of the first subframe comprises:

If the subframe structure of the first subframe is the first subframe structure, the first communications device determines that the sending time of the first subframe is T1 time units after the reference time, where T1 is a positive integer.

The method according to claim 1 or 2, wherein the subframe of the first subframe is a knot The second sub-frame structure, the length of the guard interval in the second subframe structure is ^ symbols or N ₂ time units, and the position of the guard interval in the first subframe is the a header of a subframe, wherein the ^ is a positive number, and the N ₂ is a positive integer;

Or the length of the data signal in the second subframe structure is N ₃ symbols or N ₄ time units, and the position of the data signal in the first subframe is the tail of the first subframe. Wherein N ₃ is a positive number, and N ₄ is a positive integer.

The method according to claim 5, wherein the determining, by the first communications device, the sending moment of the first subframe, includes: if the subframe structure of the first subframe is a second subframe structure, Then, the first communications device determines that the sending time of the first subframe is T ₂ time units before the reference time, where the Τ ₂ is a positive integer.

The method according to claim 1 or 2, wherein the subframe structure of the first subframe is a third subframe structure, and the length of the guard interval in the third subframe structure is ^ a symbol or Κ ₂ time units, where a position of the guard interval in the first subframe is a head and a tail of the first subframe, where the ^ is a positive number, and the κ ₂ is a positive integer;

Alternatively, the length of the data signal of the third sub-frame structure is Κ ₃ Κ4 symbols or time units, the position of the data signal in the first subframe in the middle of the first subframe, Wherein Κ ₃ is a positive number, and Κ ₄ is a positive integer.

The method according to claim 1 or 2, wherein the subframe structure of the first subframe is a fourth subframe structure, and the length of the guard interval in the fourth subframe structure is 0. Symbol or 0 time unit.

The method according to claim 7 or 8, wherein the determining, by the first communications device, the sending moment of the first subframe comprises: if the subframe structure of the first subframe is the third subframe Τ ₄ time units after the fourth sub-frame structure or structure, the first communications device determines if the first subframe transmission time is the reference time, or before the reference time Τ ₃ time units, or reference time Wherein Τ ₃ and Τ ₄ are positive integers.

10. The method according to claim 3 or 5 or 7, wherein the guard interval The length is greater than or equal to the transceiving conversion time requirement and less than twice the transceiving conversion time requirement, or the length of the protection interval is greater than or equal to twice the transceiving conversion time requirement, wherein the transceiving conversion time requirement is a predefined value.

The method according to claim 3 or 5 or 7, wherein the M ₂ or N ₂ or K _{2 is} greater than or equal to 624 and less than 1248, or the M ₂ or N ₂ or K _{2 is} greater than Or equal to 1248.

The method according to any one of claims 2 to 11, wherein the subframe structure of the first subframe further includes a data symbol, wherein a cyclic prefix of the data symbol is an extended cyclic prefix.

The method according to any one of claims 2 to 11, wherein the subframe structure of the first subframe further includes a data symbol, wherein the first data symbol in the first subframe The cyclic prefix is an extended cyclic prefix.

The method according to claim 12 or 13, the lengthened cyclic prefix is that the length of the cyclic prefix is greater than the length of a cyclic prefix of a data symbol included in a subframe transmitted by the first communications device to a base station. .

The method according to any one of claims 3 to 11, wherein the time unit is time sampling, and the symbol is an orthogonal frequency division multiple access OFDMA symbol or a single carrier frequency division multiple access (SC) -FDMA symbol.

The method according to any one of claims 1 to 15, wherein the determining, by the first communications device, the subframe structure of the first subframe comprises:

Receiving, by the first communications device, a subframe configuration instruction sent by the base station;

Determining, by the first communication device, a length of a guard interval in a subframe structure of the first subframe and a position of the guard interval in the first subframe according to the subframe configuration instruction, or The first communication device determines, according to the subframe configuration instruction, a length of a data signal in a subframe structure of the first subframe and a position of the data signal in the first subframe.

The method according to claim 16, wherein the determining, by the first communications device, the sending moment of the first subframe, the determining, by the first communications device, the determining, according to the subframe configuration instruction The transmission time of the first subframe.

The method according to any one of claims 1 to 15, wherein the determining, by the first communications device, the subframe structure of the first subframe, the method includes: the first communications device according to the first subframe The transmission mode and the state of one subframe before the first subframe and/or after the first subframe determine the length of the guard interval in the subframe structure of the first subframe and the guard interval in the first subframe Position, or, the first communications device determines a data signal in a subframe structure of the first subframe according to a transmission mode of the first subframe and a state of one subframe before the first subframe and/or after the first subframe The length and the position of the data signal in the first subframe.

The method according to claim 18, wherein the determining, by the first communications device, the sending moment of the first subframe comprises: the first communications device according to the transmission mode and the first subframe of the first subframe The state of the first subframe before and/or after the first subframe determines the transmission timing of the first subframe.

The method according to any one of claims 1 to 19, wherein the method further comprises: the first communication device transmitting a subframe configuration instruction of the first subframe to the second communication device.

A method for receiving a signal for device-to-device communication, comprising: determining, by a second communication device, a subframe structure of a first subframe sent by the first communications device;

The second communication device receives the first subframe according to the subframe structure of the first subframe, where, if the second communications device identifies, according to the subframe structure, the guard interval is included in the first subframe Transmitting, in the range of the length of the guard interval, a signal that does not receive the location of the guard interval in the first subframe, or if the second communications device identifies the first location according to the subframe structure A data signal is included in a sub-frame, and a signal at a position of the data signal in the first sub-frame is received within a length of the data signal.

The method according to claim 21, wherein the subframe structure of the first subframe is dynamic, wherein the subframe structure of the first subframe is dynamic and refers to any adjacent The subframe structure of the two first subframes may be different.

The method according to claim 21 or 22, wherein the subframe structure of the first subframe is a first subframe structure, and the length of the guard interval in the first subframe structure is a symbol or M ₂ time units, the position of the guard interval in the first subframe is the tail of the first subframe, where the positive number, the M ₂ is a positive integer;

The method according to claim 21 or 22, wherein the subframe structure of the first subframe is a second subframe structure, and the length of the guard interval in the second subframe structure is a symbol or N ₂ time units, where the position of the guard interval in the first subframe is a header of the first subframe, where the ^ is a positive number, and the N ₂ is a positive integer;

The method according to claim 21 or 22, wherein the subframe structure of the first subframe is a third subframe structure, and the length of the guard interval in the third subframe structure is a symbol or K ₂ time units, the position of the guard interval in the first subframe is the head and the tail of the first subframe, wherein the ^ is a positive number, and the Κ ₂ is a positive integer;

Alternatively, the length of the data signal of the third sub-frame structure is the symbol or Κ ₃ time units, the position of the data signal in the first middle subframe is the first subframe, wherein The Κ ₃ is a positive number, and the Κ ₄ is a positive integer.

The method according to claim 21 or 22, wherein the subframe structure of the first subframe is a fourth subframe structure, and the length of the guard interval in the fourth subframe structure is 0. Symbol or 0 time units.

The method according to claim 23 or 24 or 25, wherein the length of the guard interval is greater than or equal to the transceiving switching time requirement and less than twice the transceiving switching time requirement, or the length of the guard interval It is greater than or equal to twice the transceiving conversion time requirement, wherein the transceiving conversion time requirement is a predefined value.

The method according to claim 23 or 24 or 25, wherein the M ₂ or N ₂ or K _{2 is} greater than or equal to 624 and less than 1248, or the Μ ₂ or Ν ₂ or Κ _{2 is} greater than Or equal to 1248.

The method according to any one of claims 21 to 28, wherein the subframe structure of the first subframe further includes a data symbol, wherein a cyclic prefix of the data symbol is an extended cyclic prefix.

The method according to any one of claims 21 to 28, wherein the subframe structure of the first subframe further includes a data symbol, wherein the first data symbol in the first subframe The cyclic prefix is an extended cyclic prefix.

The method according to claim 29 or 30, wherein the extended cyclic prefix means that the length of the cyclic prefix is greater than a data symbol included in a subframe transmitted by the first communications device to a base station. The length of the cyclic prefix.

The method according to any one of claims 23 to 28, wherein the time unit is time sampling, and the symbol is an orthogonal frequency division multiple access OFDMA symbol or a single carrier frequency division multiple access (SC) -FDMA symbol.

The method according to any one of claims 21 to 32, wherein the determining, by the second communication device, the subframe structure of the first subframe sent by the first communications device comprises:

Receiving, by the second communications device, a subframe configuration instruction sent by the base station or the first communications device; the second communications device determining, according to the subframe configuration instruction, a guard interval in a subframe structure of the first subframe And a length of the guard interval in the first subframe, or the second communications device determines, according to the subframe configuration instruction, a length of a data signal in a subframe structure of the first subframe And a location of the data signal in the first subframe.

The method according to any one of claims 21 to 32, wherein the determining, by the second communications device, the subframe structure of the first subframe, the second communications device according to the first subframe The transmission mode and the state of one subframe before the first subframe and/or after the first subframe determine the length of the guard interval in the subframe structure of the first subframe and the guard interval in the first subframe Location, or, said The second communication device determines the length of the data signal in the subframe structure of the first subframe and the data according to the transmission mode of the first subframe and the state of the one subframe before the first subframe and/or after the first subframe The position of the signal in the first subframe.

35. A communication device, comprising: a determining module and a first sending module;

The determining module is configured to determine a sending moment of the first subframe and a subframe structure of the first subframe, where the first subframe includes a guard interval, and the subframe structure of the first subframe includes The length of the guard interval and the position of the guard interval in the first subframe, or the first subframe includes a data signal, and the subframe structure of the first subframe includes the data signal a length and a position of the data signal in the first subframe;

The first sending module is configured to send the first subframe to the second communications device according to the subframe structure of the first subframe according to the sending moment of the first subframe determined by the determining module.

The communication device according to claim 35, wherein the subframe structure of the first subframe is dynamic, wherein the subframe structure of the first subframe is dynamic and refers to any adjacent The subframe structure of the two first subframes may be different.

The communication device according to claim 35 or 36, wherein the subframe structure of the first subframe is a first subframe structure, and the length of the guard interval in the first subframe structure is a symbol Or M ₂ time units, the position of the guard interval in the first subframe is a tail of the first subframe, where the positive number, the M ₂ is a positive integer;

The communication device according to claim 37, wherein the determining module is specifically configured to: when the subframe structure of the first subframe is a first subframe structure, determine the first subframe The transmission time is a time unit after the reference time, where Ί\ is a positive integer.

39. The communication device according to claim 35 or 36, wherein: the first subframe The subframe structure is a second subframe structure, the length of the guard interval in the second subframe structure is a symbol or N ₂ time units, and the position of the guard interval in the first subframe is the a header of the first subframe, where the ^ is a positive number, and the N ₂ is a positive integer;

The communication device according to claim 39, wherein the determining module is further configured to: when the subframe structure of the first subframe is a second subframe structure, determine the first subframe The transmission time is T ₂ time units before the reference time, where Τ ₂ is a positive integer.

The communication device according to claim 35 or 36, wherein the subframe structure of the first subframe is a third subframe structure, and the length of the guard interval in the third subframe structure is a symbol Or K ₂ time units, the position of the guard interval in the first subframe is a header and a tail of the first subframe, where the ^ is a positive number, and the κ ₂ is a positive integer;

Or the length of the data signal in the third subframe structure is κ ₃ symbols or κ ₄ time units, and the position of the data signal in the first subframe is the middle of the first subframe. Wherein κ ₃ is a positive number and κ ₄ is a positive integer.

The communication device according to claim 35 or 36, wherein the subframe structure of the first subframe is a fourth subframe structure, and the length of the guard interval in the fourth subframe structure is 0. Symbols or 0 time units.

The communication device according to claim 41 or 42, wherein the determining module is further configured to: when the subframe structure of the first subframe is a third subframe structure or a fourth subframe structure, determining transmission timing of the first subframe is a reference time, or before the reference time Τ ₃ time units or time units τ ₄ after the reference time, wherein said τ ₃ and τ ₄ are positive integers.

The communication device according to claim 37 or 39 or 41, wherein the length of the guard interval is greater than or equal to the transceiving conversion time requirement and less than twice the transceiving conversion time requirement, or the guard interval The length is greater than or equal to twice the demand for the transmission and reception conversion time, wherein the The conversion time requirement is a predefined value.

45. The communication device according to claim 37 or 39 or 41, wherein said M ₂ or N ₂ or K _{2 is} greater than or equal to 624 and less than 1248, or said Μ ₂ or Ν ₂ or Κ ₂ Greater than or equal to 1248.

The communication device according to any one of claims 36 to 45, wherein the subframe structure of the first subframe further includes a data symbol, wherein a cyclic prefix of the data symbol is an extended cyclic prefix .

The communication device according to any one of claims 36 to 45, wherein the subframe structure of the first subframe further includes a data symbol, wherein the first data in the first subframe The cyclic prefix of a symbol is an extended cyclic prefix.

The communication device according to claim 46 or 47, wherein the extended cyclic prefix means that the length of the cyclic prefix is greater than a data symbol included in a subframe transmitted by the first communication device to a base station. The length of the cyclic prefix.

The communication device according to any one of claims 37 to 45, wherein the time unit is time sampling, and the symbol is orthogonal frequency division multiple access OFDMA symbol or single carrier frequency division multiple access. SC-FDMA symbol.

The communication device according to any one of claims 35 to 49, wherein the determining module comprises: a receiving unit and a first determining unit;

The receiving unit is configured to receive a subframe configuration instruction sent by the base station;

The first determining unit is configured to determine, according to the subframe configuration instruction received by the receiving unit, a length of a guard interval in a subframe structure of the first subframe and the guard interval in the first subframe. Or the first determining unit is configured to determine, according to the subframe configuration instruction received by the receiving unit, a length of a data signal in a subframe structure of the first subframe and the data signal is The position in the first subframe.

The communication device according to claim 50, wherein the determining module further comprises a second determining unit, wherein the second determining unit is configured to determine the first child according to the subframe configuration instruction The time at which the frame was sent.

The communication device according to any one of claims 35 to 49, wherein the determining module comprises a third determining unit, wherein the third determining unit is configured to use a transmission mode according to the first subframe and the first a state of a subframe before and/or after the first subframe determines a length of a guard interval in a subframe structure of the first subframe and a position of the guard interval in the first subframe, or The third determining unit is configured to determine a length of a data signal in a subframe structure of the first subframe according to a transmission mode of the first subframe and a state of one subframe before the first subframe and/or after the first subframe The location of the data signal in the first subframe.

The communication device according to claim 52, wherein the determining module further comprises a fourth determining unit, wherein the fourth determining unit is configured to use the transmission mode of the first subframe and the first subframe and / or the state of one subframe after the first subframe determines the transmission timing of the first subframe.

The communication device according to any one of claims 35 to 53, wherein the communication device further includes a second sending module, wherein the second sending module is configured to send the first to the second communications device Subframe configuration instruction for a subframe.

55. A communication device, the communication device comprising: a determining module and a receiving module;

The determining module is configured to determine a subframe structure of the first subframe that is sent by the first communications device, where the receiving module is configured to receive the first frame according to the subframe structure of the first subframe determined by the determining module a sub-frame, wherein, when the receiving module identifies that the first subframe includes a guard interval according to the subframe structure, the first subframe is not received within a length of the guard interval. a signal indicating a location of the guard interval, or, when the receiving module identifies that the first subframe includes a data signal according to the subframe structure, receiving the first in a length range of the data signal The signal at the location of the data signal in the sub-frame.

The communication device according to claim 55, wherein the subframe structure of the first subframe is dynamic, wherein a subframe structure of the first subframe is dynamic and refers to any adjacent The subframe structure of the two first subframes may be different.

The communication device according to claim 55 or 56, wherein the subframe structure of the first subframe is a first subframe structure, and the length of the guard interval in the first subframe structure is a symbol Or M ₂ time units, the position of the guard interval in the first subframe is a tail of the first subframe, where the positive number, the M ₂ is a positive integer;

The communication device according to claim 55 or 56, wherein the subframe structure of the first subframe is a second subframe structure, and the length of the guard interval in the second subframe structure is a symbol Or N ₂ time units, where a position of the guard interval in the first subframe is a header of the first subframe, where the ^ is a positive number, and the N ₂ is a positive integer;

The communication device according to claim 55 or 56, wherein the subframe structure of the first subframe is a third subframe structure, and the length of the guard interval in the third subframe structure is a symbol Or K ₂ time units, the position of the guard interval in the first subframe is a header and a tail of the first subframe, where the ^ is a positive number, and the κ ₂ is a positive integer;

The communication device according to claim 55 or 56, wherein the subframe structure of the first subframe is a fourth subframe structure, and the length of the guard interval in the fourth subframe structure is 0. Symbols or 0 time units.

61. The communication device according to claim 57 or 58 or 59, wherein the length of the guard interval is greater than or equal to a transceiving conversion time requirement and less than twice the transceiving conversion time requirement. Alternatively, the length of the guard interval is greater than or equal to twice the transceiving conversion time requirement, wherein the transceiving conversion time requirement is a predefined value.

62. The communication device of claim 57 or 58 or 59, wherein the M ₂ or N ₂ or K _{2 is} greater than or equal to 624 and less than 1248, or the Μ ₂ or Ν ₂ or Κ ₂ Greater than or equal to 1248.

The communication device according to any one of claims 55 to 62, wherein the subframe structure of the first subframe further includes a data symbol, wherein a cyclic prefix of the data symbol is an extended cyclic prefix .

The communication device according to any one of claims 55 to 62, wherein the subframe structure of the first subframe further includes a data symbol, wherein the first data in the first subframe The cyclic prefix of a symbol is an extended cyclic prefix.

The communication device according to claim 63 or 64, wherein the extended cyclic prefix means that the length of the cyclic prefix is greater than a data symbol included in a subframe that the first communication device transmits to the base station. The length of the cyclic prefix.

The communication device according to any one of claims 57 to 62, wherein the time unit is time sampling, and the symbol is orthogonal frequency division multiple access OFDMA symbol or single carrier frequency division multiple access. SC-FDMA symbol.

The communication device according to any one of claims 55 to 66, wherein the determining module comprises: a receiving unit and a determining unit;

The receiving unit is configured to receive a subframe configuration instruction sent by the base station or the first communications device, where the determining unit is configured to determine, according to the subframe configuration instruction received by the receiving unit, a child of the first subframe The length of the guard interval in the frame structure and the position of the guard interval in the first subframe, or the determining unit is configured to determine the first according to the subframe configuration instruction received by the receiving unit The length of the data signal in the subframe structure of the subframe and the position of the data signal in the first subframe.

68. The communication device according to any one of claims 55 to 66, wherein The determining module is specifically configured to determine, according to a transmission mode of the first subframe, a state of the guard interval in the subframe structure of the first subframe, and the foregoing, before the first subframe and/or a state of one subframe subsequent to the first subframe And the determining module is configured to use, according to the transmission mode of the first subframe, and the state of one subframe before the first subframe and/or after the first subframe. Determining a length of a data signal in a subframe structure of the first subframe and a position of the data signal in the first subframe.

69. A device for transmitting a device-to-device signal, the device comprising: a processor, a memory coupled to the processor, and a transmitter;

The processor is configured to determine a sending moment of the first subframe and a subframe structure of the first subframe, where the first subframe includes a guard interval, and the subframe structure of the first subframe includes the The length of the guard interval and the position of the guard interval in the first subframe, or the first subframe includes a data signal, and the subframe structure of the first subframe includes the data signal a length and a position of the data signal in the first subframe;

The memory is configured to store a sending moment of the first subframe determined by the processor and a subframe structure of the first subframe;

The processor is configured to control, by the sending moment of the first subframe, the transmitter to send the first subframe to a second communications device according to a subframe structure of the first subframe.

The device according to claim 69, wherein the subframe structure of the first subframe is dynamic, wherein the subframe structure of the first subframe is dynamic and refers to any adjacent The subframe structure of the two first subframes may be different.

71. A receiving device for a device-to-device signal, the device comprising: a processor, a memory coupled to the processor, and a receiver;

The receiver is configured to receive a first subframe sent by the first communications device;

The memory is configured to store the received first subframe;

The processor is configured to retrieve a first subframe stored by the memory, and determine a subframe structure of a first subframe sent by the first communications device;

The processor is further configured to include a protection room in the first subframe according to the subframe structure Separately, controlling, within a length of the guard interval, a signal that the receiver does not receive the location of the guard interval in the first subframe, or the processor is further configured to The frame structure identifies that when the data signal is included in the first subframe, controlling, by the length of the data signal, the receiver to receive a signal at a location of the data signal in the first subframe, and The received signal is stored in the memory.

The device according to claim 71, wherein the subframe structure of the first subframe is dynamic, wherein the subframe structure of the first subframe is dynamic and refers to any adjacent The subframe structure of the two first subframes may be different.