WO2015035604A1 - Procédé de transmission, équipement utilisateur et station de base pour communication d2d - Google Patents

Procédé de transmission, équipement utilisateur et station de base pour communication d2d Download PDF

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Publication number
WO2015035604A1
WO2015035604A1 PCT/CN2013/083461 CN2013083461W WO2015035604A1 WO 2015035604 A1 WO2015035604 A1 WO 2015035604A1 CN 2013083461 W CN2013083461 W CN 2013083461W WO 2015035604 A1 WO2015035604 A1 WO 2015035604A1
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WO
WIPO (PCT)
Prior art keywords
communication
signal
user equipment
subcarrier
signal modulation
Prior art date
Application number
PCT/CN2013/083461
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English (en)
Chinese (zh)
Inventor
张磊
王轶
周华
Original Assignee
富士通株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 富士通株式会社 filed Critical 富士通株式会社
Priority to CN201380077418.6A priority Critical patent/CN105325036B/zh
Priority to PCT/CN2013/083461 priority patent/WO2015035604A1/fr
Publication of WO2015035604A1 publication Critical patent/WO2015035604A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/02—Selection of wireless resources by user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2626—Arrangements specific to the transmitter only
    • H04L27/2646—Arrangements specific to the transmitter only using feedback from receiver for adjusting OFDM transmission parameters, e.g. transmission timing or guard interval length
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2647—Arrangements specific to the receiver only
    • H04L27/2655—Synchronisation arrangements
    • H04L27/2657—Carrier synchronisation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0058—Allocation criteria
    • H04L5/0062—Avoidance of ingress interference, e.g. ham radio channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/14—Direct-mode setup

Definitions

  • the present invention relates to the field of communications, and in particular, to a method for transmitting D2D communication, a user equipment, and a base station. Background technique
  • D2D device-to-device
  • OFDM Orthogonal Frequency Division Multiplexing
  • UE User Equipment
  • PAPR Peak-to-Average Power Ratio
  • FIG. 1 is a schematic diagram of a mapping manner of an existing uplink subcarrier
  • FIG. 2 is a schematic diagram of a mapping manner of an existing downlink subcarrier
  • FIG. 1 shows an uplink SC-FDM signal modulation scheme and a downlink OFDM signal modulation, respectively. the way.
  • the subcarrier mapping modes of the uplink signal and the downlink signal are different, and the subcarrier center positions are different by 7.5 kHz, that is, half of the subcarriers. Further, in the OFDM signal modulation scheme, there may be zero subcarriers.
  • the D2D user equipment needs to occupy the common time-frequency resources of one cell for D2D communication, then the uplink frequency band of the occupied cell is more reasonable, and thus the interference generated by the D2D communication only affects.
  • the reception on the base station side does not affect the reception on the UE side.
  • the signal processing capability of the base station side is stronger, and accordingly, the anti-interference capability is also stronger.
  • the uplink and downlink frame structures in the Time Division Duplex (TDD) mode may include only one or two uplink subframes, It is also possible to use the downlink time-frequency resources of the cell for D2D communication in the future.
  • TDD Time Division Duplex
  • the signals between the two UEs may adopt an OFDM modulation method or an SC-FDM modulation method.
  • the SC-FDM signal modulation method can reuse the UE side transmission device. Set and guarantee a lower PAPR level; OFDM modulation can reuse the receiver module on the UE side, reduce the pilot density, and provide a more flexible resource scheduling mode.
  • the inventor has found that: if the uplink time-frequency resource adopts the existing OFDM modulation mode of LTE or the downlink time-frequency resource adopts the existing LTE SC-FDM modulation mode for D2D communication, the D2D communication signal and the ordinary uplink Or the downlink signals may overlap each other, which in turn affects the communication quality.
  • the overlap caused by this lack of orthogonality is mainly caused by the fact that the existing LTE OFDM modulation method and the SC-FDM modulation method deviate from each other by half a subcarrier in the subcarrier mapping.
  • Embodiments of the present invention provide a transmission method, a user equipment, and a base station of D2D communication.
  • the purpose is to solve the problem that the above D2D communication signal and ordinary uplink or downlink signals may overlap with each other to affect the communication quality.
  • a method for transmitting D2D communication is provided.
  • the user equipment adopts an OFDM signal modulation mode on an uplink time-frequency resource or a SC-FDM signal modulation mode on a downlink time-frequency resource to perform D2D communication.
  • the method includes:
  • the user equipment aligns a subcarrier center of the D2D communication signal using the OFDM signal modulation mode with a subcarrier center of the uplink time frequency resource signal;
  • the user equipment aligns the subcarrier center of the D2D communication signal in the SC-FDM signal modulation mode with the subcarrier center of the downlink time-frequency resource signal.
  • a method for transmitting D2D communication includes:
  • the user equipment vacates one or more subcarriers in a D2D communication signal using an OFDM signal modulation mode
  • the user equipment vacates one or more subcarriers in a D2D communication signal adopting an SC-FDM signal modulation mode.
  • a method for transmitting D2D communication includes: a base station scheduling a user equipment for D2D communication on a resource that is not adjacent to a zero subframe.
  • a user equipment where an OFDM signal modulation mode is adopted on an uplink time-frequency resource, or an SC-FDM signal modulation mode is used to perform D2D communication on a downlink time-frequency resource, where the user equipment is used.
  • the first mapping unit aligns the subcarrier center of the D2D communication signal adopting the OFDM signal modulation mode with the subcarrier center of the uplink time-frequency resource signal; or, the subcarrier center of the D2D communication signal adopting the SC-FDM signal modulation mode The subcarrier center of the downlink time-frequency resource signal is aligned.
  • a user equipment where an OFDM signal modulation mode is adopted on an uplink time-frequency resource, or an SC-FDM signal modulation mode is used to perform D2D communication on a downlink time-frequency resource, where the user equipment is used.
  • the second mapping unit vacates one or more subcarriers in the D2D communication signal adopting the OFDM signal modulation mode; or, the one or more subcarriers are hollow in the D2D communication signal adopting the SC-FDM signal modulation mode.
  • a base station is provided, where the base station includes:
  • the scheduling unit schedules the user equipment for D2D communication on resources that are not adjacent to the zero subframe.
  • a communication system comprising the user equipment as described above, and a base station as described above.
  • a computer readable program wherein when the program is executed in a base station, the program causes a computer to perform a transmission method of D2D communication as described above in the base station.
  • a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform a transmission method of D2D communication as described above in a base station.
  • a computer readable program wherein when the program is executed in a user equipment, the program causes a computer to perform transmission of D2D communication as described above in the user equipment method.
  • a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform transmission of D2D communication as described above in a user equipment Method.
  • the beneficial effects of the embodiments of the present invention are: aligning the subcarrier center of the D2D communication signal with the subcarrier center of the uplink/downlink time-frequency resource signal, so that the signal of the D2D communication and the signal of the uplink time-frequency resource are orthogonal; One or more subcarriers are hollow in the D2D communication signal to avoid maximum interference between adjacent subcarriers. Thereby, communication quality problems due to aliasing of signals can be solved or suppressed.
  • 1 is a schematic diagram of a mapping manner of an existing uplink subcarrier
  • 2 is a schematic diagram of a mapping manner of existing downlink subcarriers
  • FIG. 3 is a schematic flowchart of a method for transmitting D2D communication according to Embodiment 1 of the present invention
  • FIG. 4 is a schematic diagram of a D2D signal moving to a left half of a subframe according to Embodiment 1 of the present invention
  • FIG. 5 is a schematic diagram of a D2D signal moving to a right half of a subframe according to Embodiment 1 of the present invention.
  • FIG. 6 is a schematic diagram of canceling a zero subcarrier and moving a half subframe to the left/right according to Embodiment 1 of the present invention
  • FIG. 7 is a diagram showing a reserved zero subcarrier and a left/right shift of a half subframe according to Embodiment 1 of the present invention
  • FIG. 8 is a schematic diagram of adding a zero subcarrier and moving a half subframe to the left/right according to Embodiment 1 of the present invention
  • FIG. 9 is a schematic diagram of moving a half subframe to the left/right according to Embodiment 1 of the present invention
  • FIG. 10 is a schematic diagram of adding a zero subcarrier and moving a half subframe to the left/right direction according to Embodiment 1 of the present invention
  • FIG. 11 is a schematic flowchart of a method for transmitting D2D communication according to Embodiment 2 of the present invention
  • FIG. 12 is a schematic diagram of a left idle subcarrier on the left side according to Embodiment 2 of the present invention.
  • FIG. 13 is a schematic diagram of a null subcarrier on the right side according to Embodiment 2 of the present invention.
  • FIG. 14 is a schematic diagram of a null subcarrier on both sides according to Embodiment 2 of the present invention.
  • FIG. 15 is a schematic diagram of a method for transmitting D2D communication according to Embodiment 3 of the present invention.
  • FIG. 16 is a schematic structural diagram of a user equipment according to Embodiment 4 of the present invention.
  • FIG. 17 is a schematic structural diagram of a user equipment according to Embodiment 5 of the present invention.
  • FIG. 18 is a schematic structural diagram of a base station according to Embodiment 6 of the present invention.
  • Figure 19 is a block diagram showing the configuration of a communication system according to a seventh embodiment of the present invention.
  • the embodiment of the invention provides a method for transmitting D2D communication, which is applied to the user equipment side.
  • the user equipment uses the OFDM signal modulation mode for D2D communication on the uplink time-frequency resources, or adopts the SC-FDM signal modulation mode for D2D communication on the downlink time-frequency resources.
  • FIG. 3 is a schematic flowchart of a method for transmitting D2D communication according to an embodiment of the present invention. As shown in FIG. 3, the method includes:
  • Step 301 The user equipment aligns a subcarrier center of the D2D communication signal that adopts the OFDM signal modulation mode with a subcarrier center of the uplink time-frequency resource signal, or uses a subcarrier center and a downlink of the D2D communication signal that adopts the SC-FDM signal modulation mode.
  • the subcarrier center of the time-frequency resource signal is aligned.
  • the subcarrier center of the D2D communication signal and the subcarrier of the uplink time-frequency resource signal may be performed when performing subcarrier mapping. Center alignment; thus, the signal of the D2D communication and the signal of the uplink time-frequency resource can be kept positive Intercourse, there will be no overlap and affect the quality of communication.
  • the sub-carrier center of the signal for performing D2D communication and the sub-carrier center of the signal of the downlink time-frequency resource may be aligned when performing sub-carrier mapping; This can make the signal of the D2D communication and the signal of the downlink time-frequency resource maintain orthogonality without overlapping with each other and affecting the communication quality.
  • the user equipment moves the D2D communication signal that adopts the OFDM signal modulation mode to the left or the right.
  • Half subcarrier such that the center of the subcarrier of the D2D communication signal is aligned with the center of the subcarrier of the uplink time-frequency resource signal;
  • the user equipment moves the D2D communication signal in the SC-FDM signal modulation mode to the left or right by half a subcarrier, so that the subcarrier center of the D2D communication signal is aligned with the subcarrier center of the downlink time-frequency resource signal.
  • FIG. 4 is a schematic diagram of a D2D signal moving to a left half of a subframe according to an embodiment of the present invention
  • FIG. 5 is a schematic diagram of a D2D signal moving to a right half of a subframe according to an embodiment of the present invention.
  • the mapping manner of the normal uplink/downlink signals is different from that of the D2D signals by half a subcarrier, which may cause aliasing.
  • the subcarrier center of the D2D signal is aligned with the center of the subcarrier of the uplink/downlink time-frequency resource signal.
  • the method may further include: the user equipment cancels the zero-subcarrier; and the user equipment adopts an OFDM signal modulation manner.
  • the D2D communication signal moves half a subcarrier to the left or right such that the subcarrier center of the D2D communication signal is aligned with the subcarrier center of the uplink time-frequency resource signal.
  • FIG. 6 is a schematic diagram of canceling a zero subcarrier and moving a half subframe to the left/right to the right according to an embodiment of the present invention.
  • the subcarrier mapping may be shifted to the left or right by half of the subcarriers, and the zero subcarriers are cancelled.
  • the subcarrier center of the D2D signal is aligned with the center of the subcarrier of the uplink time-frequency resource signal, thereby maintaining the orthogonality of the signals without aliasing and affecting the communication quality.
  • the existing IFFT transform formula of OFDM can be expressed as follows (including subcarrier mapping corresponding), s /2
  • the method may further include: the user equipment retains the zero-subcarrier; and the user equipment adopts an OFDM signal modulation manner.
  • the D2D communication signal moves half a subcarrier to the left or right such that the subcarrier center of the D2D communication signal is aligned with the subcarrier center of the uplink time-frequency resource signal.
  • FIG. 7 is a schematic diagram of a reserved zero subcarrier and a left/right shift of a half subframe according to an embodiment of the present invention.
  • the subcarrier mapping may be shifted to the left or right by half a subcarrier, and the original zero subcarrier is reserved.
  • the subcarrier center of the D2D signal is aligned with the center of the subcarrier of the uplink time-frequency resource signal, thereby maintaining the orthogonality of the signals without aliasing and affecting the communication quality.
  • the zero subcarriers are reserved, the influence of adjacent interference can be reduced.
  • the method may further include: the user equipment retains the original zero-subcarrier and adds a new zero-subcarrier; And the user equipment moves the D2D communication signal in the OFDM signal modulation mode to the left or the right by half a subcarrier, so that the subcarrier center of the D2D communication signal is aligned with the subcarrier center of the uplink time-frequency resource signal.
  • FIG. 8 is a schematic diagram of adding a zero subcarrier and moving a half subframe to the left/right to the right according to an embodiment of the present invention.
  • the subcarrier mapping is shifted to the left or right by half a subcarrier, and a new zero is added in addition to the original zero subcarrier.
  • Subcarrier The subcarrier center of the D2D signal is aligned with the center of the subcarrier of the uplink time-frequency resource signal, thereby maintaining the orthogonality of the signals without aliasing and affecting the communication quality.
  • the original zero carrier is retained and a new zero subcarrier is added, the influence of adjacent interference can be further reduced.
  • the user equipment moves the D2D communication signal in the SC-FDM signal modulation mode to the left or the right by half.
  • the carrier is such that the center of the subcarrier of the D2D communication signal is aligned with the center of the subcarrier of the downlink time-frequency resource signal.
  • FIG. 9 is a schematic diagram of moving a half subframe to the left/rightward according to an embodiment of the present invention.
  • the subcarrier mapping is shifted to the left or right by half a subcarrier.
  • the subcarrier center of the D2D signal is aligned with the center of the subcarrier of the downlink time-frequency resource signal, thereby maintaining the orthogonality of the signals without aliasing and affecting the communication quality.
  • the serial number is ⁇ , the content of the RE RE carried on the antenna port p.
  • the sequence number is ⁇ , and the RE is carried on the antenna port p.
  • the sequence number is ⁇ , and the RE is carried on the antenna port p.
  • the method may further include: adding, by the user equipment, the D2D communication signal in the SC-FDM signal modulation mode a new zero subcarrier; and the user equipment moves the D2D communication signal using the SC-FDM signal modulation mode to the left or right by half a subcarrier, so that the subcarrier center of the D2D communication signal is aligned with the subcarrier center of the downlink time-frequency resource signal .
  • FIG. 10 is a schematic diagram of adding a zero subcarrier and moving a half subframe to the left/right to the right according to an embodiment of the present invention.
  • the subcarrier mapping is shifted to the left or right by half a subcarrier, and a zero subcarrier is added.
  • the subcarrier center of the D2D signal is aligned with the center of the subcarrier of the downlink time-frequency resource signal, thereby maintaining the orthogonality of the signals without intermixing and affecting the communication quality.
  • the effect of adjacent interference can be further reduced due to the addition of new zero subcarriers.
  • FIG. 8 or FIG. 10 only shows the case where one zero subcarrier is added, but the present invention is not limited thereto, and for example, a plurality of zero subcarriers may be added.
  • the above-described formulas and the like are merely illustrative of the present invention, but the present invention is not limited thereto, and specific embodiments may be determined according to actual needs. The meaning of each symbol of the above formula can also be referred to the prior art.
  • the case where the left sub-carrier is shifted left or right is taken as an example.
  • the present invention is not limited thereto, and for example, one half, two halves, and the like may be shifted left or right.
  • the user equipment may predetermine whether to adopt the OFDM signal modulation mode, or use the SC-FDM signal modulation mode to perform D2D communication.
  • the user equipment can be determined according to the dynamic signaling configuration on the base station side.
  • the base station can be dynamically configured through physical layer signaling, MAC layer signaling, or RRC signaling.
  • the subcarrier center of the D2D communication signal adopting the OFDM signal modulation mode is aligned with the subcarrier center of the uplink time-frequency resource signal by the user equipment; or the sub-D2D communication signal of the SC-FDM signal modulation mode is used.
  • the carrier center is aligned with the center of the subcarrier of the downlink time-frequency resource signal.
  • the signal of the D2D communication and the signal of the uplink time-frequency resource can be made orthogonal, and there is no mutual aliasing and the communication quality is affected.
  • the embodiment of the invention provides a method for transmitting D2D communication, which is applied to the user equipment side.
  • the user equipment uses the OFDM signal modulation mode on the uplink time-frequency resource or the SC-FDM signal modulation mode on the downlink time-frequency resource for D2D communication.
  • FIG. 11 is a schematic flow chart of a method for transmitting D2D communication according to an embodiment of the present invention. As shown in FIG. 11, the method includes:
  • Step 1101 The user equipment vacates one or more subcarriers in the D2D communication signal adopting the OFDM signal modulation mode, or vacates one or more subcarriers in the D2D communication signal adopting the SC-FDM signal modulation mode.
  • the interference of the adjacent subcarriers is the largest, by vacating one or more subcarriers, it is possible to suppress the mutual deviation between the OFDM modulation mode and the SC-FDM modulation mode of the existing LTE in the subcarrier mapping.
  • the interference caused by half of the subcarriers is the largest, by vacating one or more subcarriers, it is possible to suppress the mutual deviation between the OFDM modulation mode and the SC-FDM modulation mode of the existing LTE in the subcarrier mapping.
  • the interference caused by half of the subcarriers.
  • the user equipment vacates one or more subcarriers on a side of the D2D communication signal that adopts the OFDM signal modulation mode, and overlaps with the signal of the uplink time-frequency resource; or adopts an SC-FDM signal modulation mode.
  • one or more subcarriers are vacant on the side of the signal aliasing with the downlink time-frequency resource.
  • a mapping method corresponding to the signal modulation method may be employed (for example, the SC-FDM modulation method adopts the method shown in FIG. 1 and the OFDM modulation method uses the method shown in FIG. 2). And, one or more subcarriers are vacant on the side of the D2D communication signal that may be aliased with the adjacent normal uplink or downlink signals.
  • FIG. 12 is a schematic diagram of a left idle subcarrier on the left side of the embodiment of the present invention
  • FIG. 13 is a schematic diagram of a left idle subcarrier on the right side of the embodiment of the present invention.
  • one or more subcarriers are vacant on a side that may be aliased with the uplink/downlink time-frequency resources, so that the D2D signals and the subcarriers of the normal uplink/downlink signals in the mixed signal are no longer Adjacent, thereby avoiding maximum interference between adjacent subcarriers and suppressing communication quality problems caused by signal aliasing.
  • the user equipment vacates one or more subcarriers on both sides of the D2D communication signal adopting the OFDM signal modulation mode, or vacant ones on both sides of the D2D communication signal adopting the SC-FDM signal modulation mode. Multiple subcarriers.
  • a mapping method corresponding to the signal modulation method may be employed (for example, the SC-FDM modulation method adopts the method shown in FIG. 1 and the OFDM modulation method uses the method shown in FIG. 2).
  • the SC-FDM modulation method adopts the method shown in FIG. 1 and the OFDM modulation method uses the method shown in FIG. 2.
  • one or more subcarriers may be vacant, and the number of vacant subcarriers on both sides may be different.
  • FIG. 14 is a schematic diagram of a null subcarrier on both sides according to an embodiment of the present invention. As shown in Figure 14, one or more subcarriers are vacant on both sides of the D2D signal to avoid maximum interference between adjacent subcarriers and to suppress communication quality problems caused by signal aliasing.
  • the user equipment may predetermine whether to adopt the OFDM signal modulation mode, or use the SC-FDM signal modulation mode to perform D2D communication.
  • the user equipment can be determined according to the dynamic signaling configuration on the base station side.
  • the base station can be dynamically configured through physical layer signaling, MAC layer signaling, or RRC signaling.
  • the user equipment has one or more subcarriers in the D2D communication signal adopting the OFDM signal modulation mode; or the D2D communication signal in the SC-FDM signal modulation mode is hollow.
  • the signal of the D2D communication and the signal of the uplink time-frequency resource may be mixed with each other to avoid the maximum interference between adjacent subcarriers, and the communication quality problem caused by the aliasing of the signals is suppressed.
  • the embodiment of the invention provides a method for transmitting D2D communication, which is described from the base station side.
  • the same contents as those of Embodiment 1 or 2 will not be described again.
  • FIG. 15 is a schematic diagram of a method for transmitting D2D communication according to an embodiment of the present invention. As shown in FIG. 15, the method includes:
  • Step 1501 The base station schedules the user equipment for D2D communication on a resource that is not adjacent to the zero subframe.
  • the base station tries to avoid resources adjacent to the zero subcarriers (such as adjacent to the zero subcarriers).
  • the RB or the RE adjacent to the zero subcarrier schedules D2D communication. Then, on the user equipment side, the user equipment can perform subcarrier mapping by the method described in Embodiment 1 or 2.
  • the method may further include:
  • Step 1502 The base station uses dynamic signaling to configure the user equipment to perform D2D communication by using an OFDM signal modulation mode or an SC-FDM signal modulation mode.
  • step 1501 there is no sequence relationship between step 1501 and step 1502. Step 1502 may be performed first and then step 1501 may be performed. The specific implementation manner may be determined according to actual conditions.
  • the base station schedules user equipment for D2D communication on resources that are not adjacent to the zero subframe.
  • the signal of the D2D communication and the signal of the uplink time-frequency resource appear to overlap each other, the maximum interference between adjacent sub-carriers is avoided, and the communication quality problem caused by the aliasing of the signals is suppressed.
  • the embodiment of the present invention provides a user equipment, which corresponds to the method for transmitting D2D communication in Embodiment 1, and the same content as Embodiment 1 is not described herein.
  • the user equipment uses the OFDM signal modulation mode on the uplink time-frequency resource or the SC-FDM signal modulation mode on the downlink time-frequency resource to perform D2D communication.
  • FIG. 16 is a schematic structural diagram of a user equipment according to an embodiment of the present invention. As shown in FIG. 16, the user equipment 1600 includes: a first mapping unit 1601. Other parts of user equipment 1600 are not shown, reference may be made to the prior art.
  • the first mapping unit 1601 aligns the subcarrier center of the D2D communication signal in the OFDM signal modulation mode with the subcarrier center of the uplink time-frequency resource signal; or, the SC-FDM signal modulation side is used.
  • the subcarrier center of the D2D communication signal is aligned with the subcarrier center of the downlink time-frequency resource signal.
  • the subcarrier center of the D2D communication signal adopting the OFDM signal modulation mode is aligned with the subcarrier center of the uplink time-frequency resource signal by the user equipment; or the sub-D2D communication signal of the SC-FDM signal modulation mode is used.
  • the carrier center is aligned with the center of the subcarrier of the downlink time-frequency resource signal.
  • the signal of the D2D communication and the signal of the uplink time-frequency resource can be made orthogonal, and there is no mutual aliasing and the communication quality is affected.
  • the embodiment of the present invention provides a user equipment, which corresponds to the transmission method of the D2D communication in the second embodiment, and the same content as that of the embodiment 2 is not described again.
  • the user equipment uses the OFDM signal modulation mode on the uplink time-frequency resource or the SC-FDM signal modulation mode on the downlink time-frequency resource to perform D2D communication.
  • FIG. 17 is a schematic structural diagram of a user equipment according to an embodiment of the present invention. As shown in FIG. 17, the user equipment 1700 includes: a second mapping unit 1701. Other portions of user equipment 1700 are not shown, reference may be made to the prior art.
  • the second mapping unit 1701 vacates one or more subcarriers in the D2D communication signal adopting the OFDM signal modulation mode; or, the one or more subcarriers are hollow in the D2D communication signal adopting the SC-FDM signal modulation mode.
  • the user equipment has one or more subcarriers in the D2D communication signal adopting the OFDM signal modulation mode, or one or more subcarriers in the D2D communication signal in the SC-FDM signal modulation mode.
  • the signal of the D2D communication and the signal of the uplink time-frequency resource appear to be mutually aliased, the maximum interference between adjacent subcarriers is avoided, and the communication quality problem caused by the aliasing of the signals is suppressed.
  • the embodiment of the present invention provides a base station, which corresponds to the transmission method of the D2D communication in the third embodiment, and the same content as that of the third embodiment is not described again.
  • FIG. 18 is a schematic diagram of a structure of a base station according to an embodiment of the present invention. As shown in FIG. 18, the base station 1800 includes: a scheduling unit 1801. Other parts of the base station 1800 that are not shown in the drawings may be referred to the prior art.
  • the scheduling unit 1801 schedules the user equipment for D2D communication on resources that are not adjacent to the zero subframe.
  • the base station 1800 may further include: a configuration unit 1802, configured to configure, by using dynamic signaling, the user equipment to perform D2D communication by using an OFDM signal modulation manner or using an SC-FDM signal modulation manner. It can be seen from the above embodiment that the base station schedules the user equipment for D2D communication on resources that are not adjacent to the zero subframe.
  • the signals of the D2D communication and the signals of the uplink time-frequency resources appear to overlap each other, the maximum interference between adjacent subcarriers is avoided, and the communication quality problem caused by the aliasing of the signals is suppressed.
  • the embodiment of the present invention further provides a communication system, including the user equipment according to Embodiment 4, and the base station according to Embodiment 6, or the user equipment as described in Embodiment 5 and the base station according to Embodiment 6 .
  • FIG. 19 is a schematic diagram of a configuration of a communication system according to an embodiment of the present invention.
  • the communication system 1900 includes a user equipment 1901, a user equipment 1902, and a base station 1903.
  • the user equipment 1901 may be the user equipment 1600, 1700 in the embodiment 4 or 5, and performs D2D communication with the user equipment 1902; the extreme cold 1903 may be the base station 1800 in the embodiment 6.
  • An embodiment of the present invention further provides a computer readable program, wherein when the program is executed in a user equipment, the program causes a computer to perform D2D communication as described in Embodiment 1 or 2 above in the user equipment. Transmission method.
  • the embodiment of the present invention further provides a storage medium storing a computer readable program, wherein the computer readable program causes the computer to execute a transmission method of D2D communication as described in Embodiment 1 or 2 above in the user equipment.
  • the embodiment of the present invention further provides a computer readable program, wherein when the program is executed in a base station, the program causes a computer to execute a transmission method of D2D communication as described in Embodiment 3 above in the base station.
  • the embodiment of the present invention further provides a storage medium storing a computer readable program, wherein the computer readable program causes a computer to execute a transmission method of D2D communication as described in Embodiment 3 above in a base station.
  • the above apparatus and method of the present invention may be implemented by hardware, or may be implemented by hardware in combination with software.
  • the present invention relates to a computer readable program that, when executed by a logic component, enables the logic component to implement the apparatus or components described above, or to cause the logic component to implement the various methods described above Or steps.
  • the present invention also relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, or the like.
  • One or more of the functional blocks described in the figures and/or one or more combinations of functional blocks may be implemented as a general purpose processor, digital signal processor (DSP) for performing the functions described herein.
  • DSP digital signal processor
  • One or more of the functional blocks described with respect to the figures and/or one or more combinations of functional blocks may also be implemented as a combination of computing devices, eg, a combination of a DSP and a microprocessor, multiple microprocessors One or more microprocessors in conjunction with DSP communication or any other such configuration.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Dans des modes de réalisation, l'invention concerne un procédé de transmission, un équipement utilisateur et une station de base pour communication D2D. L'équipement utilisateur utilise un système de modulation de signaux OFDM pour une ressource temps-fréquence de liaison montante ou un système de modulation de signaux SC-FDM pour une ressource temps-fréquence de liaison descendante afin d'établir une communication D2D. Le procédé comprend les étapes suivantes : un équipement utilisateur aligne le centre d'une sous-porteuse de signal de communication D2D qui utilise le système de modulation de signaux OFDM avec le centre d'une sous-porteuse de signal de ressource temps-fréquence de liaison montante ou aligne le centre d'une sous-porteuse de signal de communication D2D qui utilise le système de modulation de signal SC-FDM avec le centre d'une sous-porteuse de signal de ressource temps-fréquence de liaison descendante. Les modes de réalisation de l'invention permettent à un signal de communication D2D de rester orthogonal à un signal de ressource temps-fréquence de liaison montante et empêche le crénelage mutuel qui affecte la qualité d'une communication.
PCT/CN2013/083461 2013-09-13 2013-09-13 Procédé de transmission, équipement utilisateur et station de base pour communication d2d WO2015035604A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201380077418.6A CN105325036B (zh) 2013-09-13 2013-09-13 D2d通信的传输方法、用户设备以及基站
PCT/CN2013/083461 WO2015035604A1 (fr) 2013-09-13 2013-09-13 Procédé de transmission, équipement utilisateur et station de base pour communication d2d

Applications Claiming Priority (1)

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PCT/CN2013/083461 WO2015035604A1 (fr) 2013-09-13 2013-09-13 Procédé de transmission, équipement utilisateur et station de base pour communication d2d

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102244631A (zh) * 2010-05-11 2011-11-16 华为技术有限公司 一种中心子载波的配置方法和设备
CN103024911A (zh) * 2012-11-30 2013-04-03 北京邮电大学 蜂窝与d2d混合网络中终端直通通信的数据传输方法
CN103108389A (zh) * 2011-11-15 2013-05-15 中兴通讯股份有限公司 设备到设备的通信方法和系统、用户设备

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102244631A (zh) * 2010-05-11 2011-11-16 华为技术有限公司 一种中心子载波的配置方法和设备
CN103108389A (zh) * 2011-11-15 2013-05-15 中兴通讯股份有限公司 设备到设备的通信方法和系统、用户设备
CN103024911A (zh) * 2012-11-30 2013-04-03 北京邮电大学 蜂窝与d2d混合网络中终端直通通信的数据传输方法

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CN105325036A (zh) 2016-02-10

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