WO2015106698A1 - 一种d2d数据传输方法及设备 - Google Patents

一种d2d数据传输方法及设备 Download PDF

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Publication number
WO2015106698A1
WO2015106698A1 PCT/CN2015/070793 CN2015070793W WO2015106698A1 WO 2015106698 A1 WO2015106698 A1 WO 2015106698A1 CN 2015070793 W CN2015070793 W CN 2015070793W WO 2015106698 A1 WO2015106698 A1 WO 2015106698A1
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Prior art keywords
data
transmission
sending
window
opportunity
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PCT/CN2015/070793
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English (en)
French (fr)
Inventor
赵锐
高秋彬
陈文洪
彭莹
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电信科学技术研究院
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Application filed by 电信科学技术研究院 filed Critical 电信科学技术研究院
Priority to JP2016546989A priority Critical patent/JP6404935B2/ja
Priority to KR1020167022152A priority patent/KR101884707B1/ko
Priority to EP15737673.2A priority patent/EP3096543B1/en
Priority to US15/112,106 priority patent/US9860873B2/en
Publication of WO2015106698A1 publication Critical patent/WO2015106698A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • 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
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/535—Allocation or scheduling criteria for wireless resources based on resource usage policies
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/14—Direct-mode setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices

Definitions

  • the present invention relates to the field of wireless communication technologies, and in particular, to a device-to-device (D2D) data transmission method and device.
  • D2D device-to-device
  • D2D that is, the terminal direct-through technology, refers to a method in which a neighboring user equipment (User Equipment, UE) can transmit data through a direct link in a short range without forwarding through a central node (ie, a base station).
  • UE User Equipment
  • D2D transmission scenarios include: In Coverage-Single-Cell, In Coverage-Multi-Cell, Partial Coverage, and Out of Coverage. ) D2D transmission.
  • LTE D2D technology refers to the D2D discovery and communication process controlled by the LTE network operating on the LTE licensed frequency band.
  • the advantages of D2D technology can be fully utilized, and the control of LTE network can also overcome some problems of traditional D2D technology, such as uncontrollable interference.
  • the introduction of LTE D2D features will enable LTE technology to evolve from pure wireless mobile cellular communication technology to "Universal Connectivity Technology".
  • the LTE D2D system needs to support narrowband from the perspective of coverage requirements (about 1 km) and support for Voice over Internet Protocol (VoIP) services (small data volume, long service duration). Transmission, which requires multiplexing of frequency division multiplexing (FDMA) between D2D UEs.
  • FDMA frequency division multiplexing
  • Tx UE D2D UE
  • Rx UE receiving D2D UE
  • the path is The deviation of the loss can be very large, resulting in the impression that the Rx UE has a "far-near” effect due to the problem of in-band leakage.
  • the so-called "far-near” effect means that the transmission data of the Tx UE farther from the Rx UE is affected by the in-band leakage from the Tx UE closer to the Rx UE.
  • the Rx UE is receiving data of the Tx UE1, and the signal strength of the Tx UE1 data arriving at the Rx UE is -100 dBmW due to the influence of channel fading.
  • the Tx UE2 located near the Rx UE also initiates a D2D communication at the same time, and the signal strength of the Tx UE2 data arriving at the Rx UE is -60 dBmW.
  • the data transmitted by Tx UE1 and Tx UE2 are orthogonal in frequency, due to the influence of in-band leakage, the data of Tx UE1 will be affected by the in-band leakage from Tx UE2, which may result in the Rx UE failing to receive correctly.
  • Tx UE1 data Even if the data transmitted by Tx UE1 and Tx UE2 are orthogonal in frequency, due to the influence of in-band leakage, the data of Tx UE1 will be affected by the in-band leakage from Tx UE2, which may result in
  • the object of the present invention is to provide a D2D data transmission method and device to solve the problem of "far-near” effect The problem of correctly receiving data sent by a Tx UE that is far away.
  • a D2D data transmission method includes:
  • the D2D data transmitting end determines the state of each transmission opportunity in the sending window in the same manner as the D2D data receiving end, and the sending window is evenly divided into multiple sending opportunities, and the status of the sending opportunity is divided into a sending data state and a silent state;
  • the D2D data transmitting end transmits the D2D data to the D2D data receiving end in the transmission opportunity of each transmission data state.
  • the D2D data transmitting end sends data or silences on different resources (sending opportunities), so that different D2D data transmitting ends are staggered in resources, thereby alleviating the influence of the “far-near” effect, so that D2D
  • the data receiving end can correctly receive the D2D data sent by the D2D data transmitting end which is far away.
  • the D2D data transmitting end sends a data associated with the same D2D data to the D2D data receiving end in the sending window in the sending window.
  • the D2D data transmitting end may further send the identification information to the D2D data receiving end.
  • the identifier information may be the last N bits of the media access control (MAC) layer address information of the D2D data sending end; or may be any value of the DMRS initial value ranging from 0 to 503; or may be a predefined one. Random seed index information and so on.
  • MAC media access control
  • the identification information can be used to transmit initialization identification information of the scrambling sequence of the D2D data transmission in the window.
  • the identification information can also be used to transmit initialization identification information of the DMRS sequence of the D2D data transmission in the window.
  • the identification information can also be used to determine the status of each transmission opportunity in the transmission window.
  • the D2D data transmitting end determines the state of each transmission opportunity in the transmission window based on the identification information in the same manner as the D2D data receiving end.
  • the D2D data transmitting end determines that the status of each sending opportunity in the sending window is implemented.
  • the D2D data sending end sends the same manner as the D2D data receiving end.
  • Each transmission opportunity in the window generates a random number; the D2D data transmitting end determines the state of the corresponding transmission opportunity according to the generated random number.
  • the D2D data sending end may generate a random number for each sending opportunity in the sending window according to the identification information.
  • the specific implementation manner of the D2D data transmitting end determining the status of each transmission opportunity in the transmission window may also be: the D2D data transmitting end uses the identification information as an initial value of the pseudo random sequence to generate a pseudo random sequence, and a pseudo random sequence.
  • the length is the number of transmission opportunities in the transmission window, and each bit of the pseudo-random sequence corresponds to one transmission opportunity in the transmission window; the state of the corresponding transmission opportunity is determined according to the value of each bit of the pseudo-random sequence.
  • the identification information of the initialization identification information as the scrambling sequence is used as the initial of the DMRS sequence.
  • the identification information of the identification information, and/or the identification information used to determine the status of the transmission opportunity may be the same identification information, or may be different identification information. If the identification information is different, the D2D data transmitting end should separately send different identification information to the D2D data receiving end.
  • the specific implementation manner of the D2D data sending end determining the state of the corresponding sending opportunity according to the generated random number may be: the D2D data transmitting end determines whether the random number reaches a set threshold, and if so, determines a corresponding sending opportunity.
  • the state of the data is the status of the data transmission. Otherwise, the state of the corresponding transmission opportunity is determined to be a silent state.
  • the D2D data transmitting end may determine whether the result of the random number modulo the integer B is b, b ⁇ (0 , B-1), if yes, determine the state of the corresponding transmission opportunity as the transmission data state; otherwise, determine the state of the corresponding transmission opportunity to be the silent state.
  • the duration of each transmission opportunity is one subframe.
  • a D2D data transmission method includes:
  • the D2D data receiving end determines the state of each transmission opportunity in the transmission window in the same manner as the D2D data transmitting end, and the sending window is evenly divided into multiple sending opportunities, and the status of the sending opportunity is divided into a sending data state and a silent state;
  • the D2D data receiving end receives the D2D data sent by the D2D data transmitting end in the sending window in each transmitting data state.
  • the D2D data transmitting end sends data or silences on different resources (sending opportunities), so that different D2D data transmitting ends are staggered in resources, thereby alleviating the influence of the “far-near” effect, so that D2D
  • the data receiving end can correctly receive the D2D data sent by the D2D data transmitting end which is far away.
  • the D2D data receiving end may also perform chase combining on the received D2D data;
  • the data associated with the same D2D data transmitted by the transmission opportunity of each transmission data state in the transmission window is a different redundancy version, and the D2D data receiving end may also perform IR combining on the received D2D data.
  • the D2D data receiving end can receive the identification information sent by the D2D data sending end.
  • the identifier information may be the last N bits of the MAC layer address information of the D2D data sending end; or may be any value of the DMRS initial value ranging from 0 to 503; or may be the index information of the predefined random seed.
  • the identification information can be used to transmit initialization identification information of the scrambling sequence of the D2D data transmission in the window.
  • the identification information can also be used to transmit initialization identification information of the DMRS sequence of the D2D data transmission in the window.
  • the identification information can also be used to determine the status of each transmission opportunity in the transmission window.
  • the D2D data receiving end determines the status of each transmission opportunity in the transmission window based on the identification information in the same manner as the D2D data transmitting end.
  • the D2D data receiving end determines each transmission in the transmission window.
  • An implementation manner of the state of the opportunity may be: the D2D data receiving end generates a random number for each sending opportunity in the sending window in the same manner as the D2D data sending end; the D2D data receiving end determines the corresponding according to the generated random number. The status of the sending opportunity.
  • the D2D data receiving end may generate a random number for each transmission opportunity in the sending window according to the identification information.
  • the D2D data receiving end determines another state of the status of each transmission opportunity in the transmission window.
  • the D2D data receiving end uses the identification information as an initial value of the pseudo random sequence to generate a pseudo random sequence, which is pseudo-random.
  • the length of the sequence is the number of transmission opportunities in the transmission window, and each bit of the pseudo-random sequence corresponds to a transmission opportunity in the transmission window; the state of the corresponding transmission opportunity is determined according to the value of each bit of the pseudo-random sequence.
  • the identification information of the initialization identification information as the scrambling sequence, the identification information as the initialization identification information of the DMRS sequence, and/or the identification information used to determine the transmission opportunity status may be the same identification information, or may be Different identification information. If the identification information is different, the D2D data receiving end should receive different identification information respectively.
  • the specific implementation manner of the D2D data receiving end determining the state of the corresponding transmission opportunity according to the generated random number may be: the D2D data receiving end determines whether the random number reaches a set threshold, and if so, determines a corresponding sending opportunity. The state of the data is the status of the data transmission. Otherwise, the state of the corresponding transmission opportunity is determined to be a silent state.
  • the implementation manner of the D2D data receiving end may determine whether the result of the random number modulo the integer B is b, b ⁇ (0, B-1), if yes, determine the status of the corresponding transmission opportunity as the transmission data status; otherwise, determine the status of the corresponding transmission opportunity as the silent status.
  • the duration of each transmission opportunity is one subframe.
  • the embodiment of the present invention further provides a D2D data transmitting end device, including:
  • a status determining module configured to determine a status of each transmission opportunity in the transmission window in the same manner as the D2D data receiving end, the transmission window is evenly divided into multiple transmission opportunities, and the status of the transmission opportunity includes sending data status and silence status;
  • a data sending module configured to send the D2D data to the D2D data receiving end in each of the sending windows in the sending window.
  • the D2D data transmitting end sends data or silences on different resources (sending opportunities), so that different D2D data transmitting ends are staggered in resources, thereby alleviating the influence of the “far-near” effect, so that D2D
  • the data receiving end can correctly receive the D2D data sent by the D2D data transmitting end which is far away.
  • the data sending module is specifically configured to send, in the sending window, a transmission opportunity of each data transmission state to the D2D data receiving end to transmit data associated with the same D2D data.
  • the method further includes an identifier information sending module, configured to send the identifier information to the D2D data receiving end.
  • an identifier information sending module configured to send the identifier information to the D2D data receiving end.
  • the identification information is:
  • the initial value of the DMRS ranges from 0 to 503; or,
  • the identifier information is used for initializing identification information of a scrambling sequence of D2D data transmission in the sending window; and/or the identifier information is used for the device according to any one of the foregoing D2D data transmitting device embodiments.
  • Initializing identification information of a DMRS sequence of D2D data transmission in the transmission window; and/or, the identification information is used to determine a status of each transmission opportunity in the transmission window.
  • the state determining module is specifically configured to:
  • the state of each transmission opportunity within the transmission window is determined based on the identification information in the same manner as the D2D data receiving end.
  • the state determining module is specifically configured to:
  • the D2D data sending end generates a random number for each transmission opportunity in the sending window in the same manner as the D2D data receiving end;
  • the D2D data transmitting end determines the state of the corresponding transmission opportunity according to the generated random number.
  • the identifier information sending module sends the identifier information to the D2D data receiving end, where the state is determined to be a random number for each sending opportunity in the sending window, specifically:
  • the state determining module determines, according to the generated random number, a state of the corresponding sending opportunity, specifically:
  • the state determining module is specifically configured to:
  • the state of the corresponding transmission opportunity is determined according to the value of each bit of the pseudo-random sequence.
  • the duration of each transmission opportunity is one subframe.
  • the embodiment of the present invention further provides a D2D UE, including a processor and a radio frequency unit:
  • the processor is configured to determine each transmitter in the transmit window in the same manner as the D2D data receiver In the state of the conference, the transmission window is evenly divided into multiple transmission opportunities, and the status of the transmission opportunity includes a transmission data state and a silence state;
  • the radio frequency unit is configured to, in the transmission window, a transmission opportunity of each transmission data state to transmit data associated with the same D2D data to the D2D data receiving end.
  • the D2D UE sends data or silences on different resources (sending opportunities), so that different D2D data transmitting ends are staggered in resources, thereby alleviating the influence of the “far-near” effect, so that D2D data receiving is performed.
  • the terminal can correctly receive the D2D data sent by the D2D data transmitting end which is far away.
  • the embodiment of the present invention further provides a D2D data receiving end device, including:
  • a status determining module configured to determine a status of each transmission opportunity in the transmission window in the same manner as the D2D data transmitting end, where the sending window is evenly divided into multiple sending opportunities, and the status of the sending opportunity includes sending data status and silence status;
  • a data receiving module configured to receive D2D data sent by the D2D data sending end in each sending event of the sending data status in the sending window.
  • the D2D data transmitting end sends data or silences on different resources (sending opportunities), so that different D2D data transmitting ends are staggered in resources, thereby alleviating the influence of the “far-near” effect, so that D2D
  • the data receiving end can correctly receive the D2D data sent by the D2D data transmitting end which is far away.
  • the data receiving module is further configured to:
  • IR combining is performed on the received D2D data.
  • An embodiment of any of the above-mentioned D2D data receiving end devices preferably further comprising an identification information receiving module, configured to receive the identification information sent by the D2D data transmitting end.
  • the identification information is:
  • the initial value of the DMRS ranges from 0 to 503; or,
  • the identification information is used for initialization identification information of a scrambling sequence of D2D data transmission in the transmission window; and/or the identification information is used for initialization of a DMRS sequence of D2D data transmission in the transmission window.
  • Identification information; and/or the identification information is used to determine a status of each transmission opportunity in the transmission window.
  • the state determining module is specifically configured to:
  • the state of each transmission opportunity within the transmission window is determined based on the identification information in the same manner as the D2D data transmitting end.
  • the state determining module is configured to:
  • the status of the corresponding transmission opportunity is determined.
  • the state determining module If the identifier information receiving module receives the identifier information sent by the D2D data sending end, the state determining module generates a random number for each sending opportunity in the sending window, specifically, according to the identifier information, Each transmission opportunity within the transmission window generates a random number.
  • the state determining module determines, according to the generated random number, a state of the corresponding sending opportunity, specifically:
  • the state determining module is specifically configured to:
  • the state of the corresponding transmission opportunity is determined according to the value of each bit of the pseudo-random sequence.
  • the duration of each transmission opportunity is one subframe.
  • the embodiment of the present invention further provides a D2D UE, including a processor and a radio frequency unit:
  • the processor is configured to determine a status of each transmission opportunity in the transmission window in the same manner as the D2D data transmitting end, the transmission window is evenly divided into a plurality of transmission opportunities, and the status of the transmission opportunity includes a transmission data status and Silent state
  • the radio frequency unit is configured to receive, in the transmission window, each D2D data sent by the D2D data transmitting end by a transmission opportunity of each data transmission state.
  • the D2D data transmitting end sends data or silences on different resources (sending opportunities), so that different D2D data transmitting ends are staggered in resources, thereby alleviating the influence of the “far-near” effect, so that D2D The UE can correctly receive the D2D data sent by the D2D data transmitting end that is far away.
  • a D2D user equipment UE includes a processor, a memory and a transmitter, wherein the memory stores a preset program, and the processor is configured to read a preset program in the memory, and execute according to the program The following process:
  • the transmission window is evenly divided into a plurality of transmission opportunities, and the status of the transmission opportunity includes a transmission data status and a silence status;
  • a D2D user equipment UE includes a processor, a memory and a transmitter, wherein the memory stores a preset program, and the processor is configured to read a preset program in the memory, and execute according to the program The following process:
  • the transmission window is evenly divided into a plurality of transmission opportunities, and the status of the transmission opportunity includes a transmission data status and a silence status;
  • FIG. 1 is a flowchart of a method according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of a sending window according to an embodiment of the present invention.
  • FIG. 3 is a flowchart of another method according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of a D2D communication frame according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a D2D data sending end device according to an embodiment of the present invention.
  • FIG. 6 is a schematic diagram of a D2D data receiving end device according to an embodiment of the present invention.
  • the embodiment of the invention provides a D2D data transmission method, as shown in FIG. 1 , which specifically includes the following operations:
  • Step 100 The D2D data transmitting end (ie, the Tx UE) determines the status of each transmission opportunity in the sending window in the same manner as the D2D data receiving end (ie, the Rx UE).
  • the sending window may refer to a physical resource in a predetermined time domain and a frequency domain, or may be a predetermined time domain length.
  • the transmission window is evenly divided into multiple transmission opportunities, and the status of the transmission opportunity is divided into a transmission data state and a silence state.
  • the transmission window is divided into a plurality of transmission opportunities in the time domain. If the transmission window refers to a physical resource in a predetermined time domain and a frequency domain, the transmission window may be divided into multiple transmission opportunities in the frequency domain, and the transmission window may be divided into multiple transmissions in the time domain and the frequency domain. opportunity.
  • the duration of one transmission opportunity may be, but is not limited to, the duration of one subframe (1 millisecond).
  • the status of the transmission opportunity determined by the Tx UE refers to the status of the transmission opportunity itself.
  • Step 110 The Tx UE sends the D2D data to the Rx UE in the sending window, in the sending window.
  • the Tx UE in the sending window, sends a data associated with the same D2D data to the Rx UE in each transmission data state.
  • the data associated with the same D2D data may refer to D2D data with the same source bit, including repetition of D2D data, incremental redundancy version of hybrid automatic repeat request (HARQ) coding, and the like.
  • HARQ hybrid automatic repeat request
  • Tx UEs respectively transmit D2D data on different subchannels.
  • the bandwidth of one subchannel in the frequency domain may be one or more physical resource blocks (PRBs), for example, may be 2, 3, or 4 PRBs.
  • PRBs physical resource blocks
  • the Tx UE sends D2D data of the same source bit in a transmission window and a transmission opportunity of each transmission data state. However, after the D2D data sent on each transmission data transmission direction is modulated and coded, if the redundancy version is the same, the actual number of transmitted bits is the same. If the redundancy version is different, the actual transmission is performed. The number of bits is different. The source bits of the D2D data transmitted in the transmission window are the same regardless of whether the number of bits actually transmitted is the same.
  • the size of the sending window, the dividing mode of the sending opportunity, and the redundancy version may be predefined, or may be configured by an eNB (within network coverage) or a cluster head (outside network coverage) and signaled.
  • the state of each transmission opportunity of Tx UE1 and Tx UE2 in the same transmission window is as shown in FIG. 2 . It can be seen that, in the technical solution provided by the embodiment of the present invention, different Tx UEs transmit data or silence on different resources (transmission opportunities), so that different Tx UEs are staggered on resources, thereby alleviating the influence of the “far-near” effect, so that the Rx UE It can correctly receive D2D data sent by Tx UEs that are far away.
  • the Tx UE determines the status of each transmission opportunity in the transmission window in various ways, as long as it is the same as the Rx UE.
  • a preferred implementation manner may be: the Tx UE generates a random number for each transmission opportunity in the transmission window in the same manner as the Rx UE; and the Tx UE determines the status of the corresponding transmission opportunity according to the generated random number. Specifically, the Tx UE may generate a random number for each transmission opportunity in the sending window according to the identification information.
  • the Tx UE generates the pseudo random sequence by using the identifier information as an initial value of the pseudo random sequence, where the length of the pseudo random sequence is the number of transmission opportunities in the sending window, and each of the pseudo random sequences One bit corresponds to a transmission opportunity in the transmission window; the state of the corresponding transmission opportunity is determined according to the value of each bit of the pseudo-random sequence.
  • the Tx UE can also send identification information to the Rx UE.
  • the identification information used to determine the status of the transmission opportunity needs to be staggered between resources of the Tx UEs while avoiding excessive control signaling overhead.
  • the identification information may be the last N bits of the media access control (MAC) layer address information of the Tx UE, or may be any one of the value range 0 to 503 of the initial value of the demodulation reference signal (DMRS). Value; can also be index information of a predefined random seed, and so on.
  • MAC media access control
  • DMRS demodulation reference signal
  • the identification information can also be used to transmit initialization identification information of the scrambling sequence of the D2D data transmission in the window.
  • the identification information can also be used to transmit initialization identification information of the DMRS sequence of the D2D data transmission in the window.
  • the identification information of the initialization identification information as the scrambling sequence, the identification information as the initialization identification information of the DMRS sequence, and/or the identification information used to determine the transmission opportunity status may be the same identification information, or may be Different identification information.
  • the status of the transmission opportunity may be determined only by the identification information, and only the identification information may be used as the initialization identification information of the scrambling sequence, and only the identification information may be used as the DMRS sequence.
  • the column initialization information can also be used together. If the identification information is different, the Tx UE should separately send different identification information to the Rx UE.
  • the Tx UE generates multiple random numbers for each transmission opportunity in the transmission window according to the identification information.
  • each transmission opportunity in the transmission window is according to the following formula. Generate a random number Y k :
  • k 1
  • Y k-1 Y -1
  • Y -1 n id
  • n id represents identification information
  • A 39827
  • D 65537
  • k represents the number of the transmission opportunity in the transmission window.
  • the Tx UE determines the status of the corresponding transmission opportunity according to the generated random number.
  • a preferred implementation manner may be: the Tx UE determines whether the random number reaches a set threshold, and if so, determines that the status of the corresponding sending opportunity is the sending data status; otherwise, determines that the status of the corresponding sending opportunity is the silent state.
  • the Tx UE determines whether the result of the random number modulo the integer B is b, b ⁇ (0, B-1), and if yes, determines that the status of the corresponding transmission opportunity is The data status is sent. Otherwise, the status of the corresponding sending opportunity is determined to be a silent state.
  • FIG. 3 Another D2D data transmission method provided by the embodiment of the present invention is as shown in FIG. 3, and specifically includes the following operations:
  • Step 300 The RX UE determines the status of each transmission opportunity in the transmission window in the same manner as the TX UE.
  • the sending window is evenly divided into multiple sending opportunities, and the status of the sending opportunity is divided into a sending data state and a silent state.
  • the size of the transmission window, the division manner, and the like may be predefined, or may be configured by the eNB (within the network coverage), or may be configured by the cluster head (outside the network coverage).
  • Step 310 The Rx UE receives the D2D data sent by the Tx UE in the sending window of each sending data state in the sending window.
  • the Tx UE sends data or silences on different resources (transmission opportunities), so that different Tx UEs are staggered on resources, thereby alleviating the influence of the “far-near” effect, so that the Rx UE can receive correctly.
  • the Rx UE may also perform chase combining on the received D2D data; if the transmission window The data associated with the same D2D data transmitted by the transmission opportunity of each transmission data state is a different redundancy version, and the RX UE may also perform Incremental Redundancy (IR) on the received D2D data. and.
  • IR Incremental Redundancy
  • the Rx UE may further receive the identifier information sent by the Tx UE.
  • the identifier information may be the last N bits of the MAC layer address information of the Tx UE; or may be any value of the DMRS initial value ranging from 0 to 503; or may be the index information of the predefined random seed.
  • the identification information can be used to transmit initialization identification information of the scrambling sequence of the D2D data transmission in the window.
  • the identification information can also be used to transmit initialization identification information of the DMRS sequence of the D2D data transmission in the window.
  • the Rx UE may determine that the status of each transmission opportunity in the transmission window may be: the Rx UE is in the same manner as the Tx UE.
  • the sending opportunity generates a random number; the Rx UE determines the state of the corresponding sending opportunity according to the generated random number.
  • the Rx UE may generate a random number for each transmission opportunity in the sending window according to the identification information.
  • another implementation manner in which the Rx UE determines the status of each transmission opportunity in the transmission window may be: the Rx UE generates the pseudo random sequence by using the identification information as an initial value of the pseudo random sequence, and the length of the pseudo random sequence is The number of transmission opportunities in the transmission window.
  • Each bit of the pseudo-random sequence corresponds to a transmission opportunity in the transmission window; and the state of the corresponding transmission opportunity is determined according to the value of each bit of the pseudo-random sequence.
  • the identification information of the initialization identification information as the scrambling sequence, the identification information as the initialization identification information of the DMRS sequence, and/or the identification information used to determine the transmission opportunity status may be the same identification information, or may be Different identification information. If the identification information is different, the Rx UEs should respectively receive different identification information.
  • the Rx UE can determine the status of the corresponding transmission opportunity according to the generated random number.
  • the implementation manner may be: the Rx UE determines whether the random number reaches a set threshold, and if yes, determines that the status of the corresponding sending opportunity is a sending data state; otherwise, determines that the status of the corresponding sending opportunity is a silent state; The Rx UE may determine whether the result of the random number modulo the integer B is b, b ⁇ (0, B-1), and if yes, determine that the status of the corresponding transmission opportunity is the status of the transmission data, otherwise, determine the corresponding transmission. The state of the opportunity is silent.
  • the duration of each transmission opportunity is one subframe.
  • the D2D communication frame is composed of a control channel and at least one transmission window.
  • the transmission window is composed of a plurality of subframes, and each subframe is a transmission opportunity.
  • the Tx UE transmits identification information for determining the state of the subframe through the control channel before transmitting the D2D data.
  • the Tx UE can also adopt a send/silent mode similar to the send window on the control channel.
  • the Rx UE cannot obtain the a priori identification information when the control channel is sent, the Rx UE cannot determine the status of the control channel, and it needs to receive all the time that the entire control channel may be sent until the receiving of the correct identification information is received. information.
  • the Tx UE determines each subframe according to the method provided in the above embodiment. The state, in turn, sends D2D data on a subframe in the data transmission state.
  • the data transmitted inside one transmission window is the same data of the source bits, and it is assumed that the transmission is the same redundancy version.
  • the Rx UE determines, according to the identifier information received in the control channel, a pattern of the subframe state of the Tx UE in a transmission window, so that the corresponding subframe for transmitting the data state is received by the data, and may be according to the transmitted redundancy version. Perform merge processing to improve the reliability of data reception.
  • the embodiment of the present invention further provides a D2D data transmitting end device, as shown in FIG. 5, including:
  • the status determining module 501 is configured to determine, according to the D2D data receiving end, a status of each sending opportunity in the sending window, where the sending window is evenly divided into multiple sending opportunities, and the status of the sending opportunity includes sending the data status and Silent state
  • the data sending module 502 is configured to send D2D data to the D2D data receiving end in each of the sending windows in the sending window.
  • the D2D data transmitting end sends data or silences on different resources (sending opportunities), so that different D2D data transmitting ends are staggered in resources, thereby alleviating the influence of the “far-near” effect, so that D2D
  • the data receiving end can correctly receive the D2D data sent by the D2D data transmitting end which is far away.
  • the data sending module is configured to send, in the sending window, a transmission opportunity of each of the sending data states to the D2D data receiving end to transmit data associated with the same D2D data.
  • the method further includes an identifier information sending module, configured to send the identifier information to the D2D data receiving end.
  • an identifier information sending module configured to send the identifier information to the D2D data receiving end.
  • the identification information is:
  • the initial value of the DMRS ranges from 0 to 503; or,
  • the identifier information is used for initializing identification information of a scrambling sequence of D2D data transmission in the sending window; and/or the identifier information is used for the device according to any one of the foregoing D2D data transmitting device embodiments.
  • the initialization identification information of the DMRS sequence of the D2D data transmission in the transmission window is used for initializing identification information of a scrambling sequence of D2D data transmission in the sending window.
  • the state determining module 501 is specifically configured to:
  • the D2D data sending end generates a random number for each transmission opportunity in the sending window in the same manner as the D2D data receiving end;
  • the D2D data transmitting end determines the state of the corresponding transmission opportunity according to the generated random number.
  • the state determining module 501 If the identifier information sending module sends the identifier information to the D2D data receiving end, the state determining module 501 generates a random number for each sending opportunity in the sending window, specifically for:
  • the state determining module 501 determines the state of the corresponding sending opportunity according to the generated random number. Specifically used for:
  • the state determining module 501 is specifically configured to:
  • the state of the corresponding transmission opportunity is determined according to the value of each bit of the pseudo-random sequence.
  • the duration of each transmission opportunity is one subframe.
  • the embodiment of the present invention further provides a D2D UE, including a processor, a memory, and a transmitter, where the memory is used to save a preset program, and the processor is configured to read a preset program in the memory.
  • the transmission window is evenly divided into a plurality of transmission opportunities, and the status of the transmission opportunity includes a transmission data status and a silence status;
  • the D2D UE sends data or silences on different resources (sending opportunities), so that different D2D data transmitting ends are staggered in resources, thereby alleviating the influence of the “far-near” effect, so that D2D data receiving is performed.
  • the terminal can correctly receive the D2D data sent by the D2D data transmitting end which is far away.
  • the processor instructs the transmitter to send data associated with the same D2D data to the D2D data receiving end in the transmission window in each of the transmission data states.
  • the embodiment of the present invention further provides a device for receiving a D2D data, as shown in FIG.
  • the status determining module 601 is configured to determine a status of each transmission opportunity in the sending window in the same manner as the D2D data sending end, where the sending window is evenly divided into multiple sending opportunities, and the status of the sending opportunity includes sending the data status and Silent state
  • the data receiving module 602 is configured to receive D2D data sent by the D2D data sending end in each sending event of the sending data status in the sending window.
  • the D2D data transmitting end sends data or silences on different resources (sending opportunities), so that different D2D data transmitting ends are staggered in resources, thereby alleviating the influence of the “far-near” effect, so that D2D
  • the data receiving end can correctly receive the D2D data sent by the D2D data transmitting end which is far away.
  • the data receiving module 602 is further configured to:
  • IR combining is performed on the received D2D data.
  • An embodiment of any of the above-mentioned D2D data receiving end devices preferably further comprising an identification information receiving module, configured to receive the identification information sent by the D2D data transmitting end.
  • the identification information is:
  • the initial value of the DMRS ranges from 0 to 503; or,
  • the identification information is used for initialization identification information of a scrambling sequence of D2D data transmission in the transmission window; and/or the identification information is used for initialization of a DMRS sequence of D2D data transmission in the transmission window. Identification information.
  • the state determining module 601 is configured to:
  • the status of the corresponding transmission opportunity is determined.
  • the state determining module If the identifier information receiving module receives the identifier information sent by the D2D data sending end, the state determining module generates a random number for each sending opportunity in the sending window, specifically, according to the identifier information, Each transmission opportunity within the transmission window generates a random number.
  • the state determining module 601 determines, according to the generated random number, the state of the corresponding sending opportunity, specifically for:
  • the state determining module 601 is specifically configured to:
  • the state of the corresponding transmission opportunity is determined according to the value of each bit of the pseudo-random sequence.
  • the duration of each transmission opportunity is one subframe.
  • the embodiment of the present invention further provides a D2D UE, including a processor and a storage, based on the same inventive concept as the method. And a receiver, wherein the memory stores a preset program, and the processor is configured to read a preset program in the memory, and execute the following process according to the program:
  • the transmission window is evenly divided into a plurality of transmission opportunities, and the status of the transmission opportunity includes a transmission data status and a silence status;
  • the D2D data transmitting end sends data or silences on different resources (sending opportunities), so that different D2D data transmitting ends are staggered in resources, thereby alleviating the influence of the “far-near” effect, so that D2D The UE can correctly receive the D2D data sent by the D2D data transmitting end that is far away.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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Abstract

本申请公开了一种D2D数据传输方法及设备。其方法包括：D2D数据发送端按照与D2D数据接收端相同的方式，确定发送窗口内每个发送机会的状态，所述发送窗口被均匀划分为多个发送机会，发送机会的状态包括发送数据状态和静默状态；在发送窗口中、每个发送数据状态的发送机会向D2D数据接收端发送D2D数据。本申请实施例提供的技术方案，D2D数据发送端在不同资源（发送机会）上发送数据或静默，使得不同D2D数据发送端在资源上错开，从而减轻"远-近"效应的影响。

Description

一种D2D数据传输方法及设备
本申请要求在2014年01月16日提交中国专利局、申请号为201410020048.9、发明名称为“一种D2D数据传输方法及设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及无线通信技术领域，尤其涉及一种设备到设备(Device-to-Device，D2D)数据传输方法及设备。
背景技术
D2D，即终端直通技术，是指邻近的用户设备(User Equipment，UE)可以在近距离范围内通过直连链路进行数据传输的方式，不需要通过中心节点(即基站)进行转发。
D2D研究中，几种典型的D2D传输场景包括：小区内(In Coverage-Single-Cell)、小区间(In Coverage-Multi-Cell)、部分网络覆盖(Partial Coverage)和无网络覆盖(Out of Coverage)的D2D传输。
长期演进(Long Term Evolution，LTE)D2D技术是指工作在LTE授权频段上的受LTE网络控制的D2D发现和通信过程。一方面可以充分发挥D2D技术的优势，同时LTE网络的控制也可以克服传统D2D技术的一些问题，例如干扰不可控等。LTE D2D特性的引入将使LTE技术从单纯的无线移动蜂窝通信技术向着“通用连接技术”(Universal Connectivity Technology)的方向演进。
在LTE D2D系统中，从覆盖的需求(1公里左右)和对于IP电话(Voice over Internet Protocol，VoIP)业务(小数据量，业务持续时间长)支持的角度考虑，LTE D2D系统需要支持窄带的传输，从而需要支持D2D UE之间频分复用(FDMA)的复用方式。同时，由于D2D系统中，发送端D2D UE(简称Tx UE)位置的不确定性，那么对于一个接收端D2D UE(简称Rx UE)来说，不同Tx UE发送的数据到达Rx UE时，其路径损耗的偏差可能非常大，从而由于带内泄露的问题导致Rx UE产生“远-近”效应的印象。所谓“远-近”效应，是指距离Rx UE较远的Tx UE的发送数据会受到来自距离Rx UE较近的Tx UE的带内泄露的影响。例如：Rx UE正在接收Tx UE1的数据，并且由于信道衰落的影响，Tx UE1的数据到达Rx UE的信号强度是-100dBmW。位于Rx UE附近的Tx UE2也同时发起一个D2D通信，并且Tx UE2的数据到达Rx UE的信号强度是-60dBmW。即便Tx UE1和Tx UE2发送数据在频率上是正交的，由于带内泄露的影响，那么Tx UE1的数据会受到比较强的来自Tx UE2的带内泄露的影响，从而导致Rx UE无法正确接收Tx UE1的数据。
发明内容
本发明的目的是提供一种D2D数据传输方法及设备，以解决“远-近”效应导致无法 正确接收距离较远的Tx UE发送的数据的问题。
本发明的目的是通过以下技术方案实现的：
一种D2D数据传输方法，包括：
D2D数据发送端按照与D2D数据接收端相同的方式，确定发送窗口内每个发送机会的状态，发送窗口被均匀划分为多个发送机会，发送机会的状态分为发送数据状态和静默状态；
D2D数据发送端在该发送窗口中、每个发送数据状态的发送机会向D2D数据接收端发送D2D数据。
本发明实施例提供的技术方案，D2D数据发送端在不同资源(发送机会)上发送数据或静默，使得不同D2D数据发送端在资源上错开，从而减轻“远-近”效应的影响，使得D2D数据接收端能够正确接收到距离较远的D2D数据发送端发送的D2D数据。
较佳地，D2D数据发送端在发送窗口中、每个发送数据状态的发送机会向D2D数据接收端发送关联于同一D2D数据的数据。
较佳地，D2D数据发送端还可以向D2D数据接收端发送标识信息。
该标识信息可以是D2D数据发送端的媒体接入控制(MAC)层地址信息的后N位；也可以是DMRS初始值的取值范围0～503中的任一取值；还可以是预定义的随机种子的索引信息等等。
标识信息可以用于发送窗口中D2D数据传输的加扰序列的初始化标识信息。
标识信息也可以用于发送窗口中D2D数据传输的DMRS序列的初始化标识信息。
标识信息也可以用于确定所述发送窗口中的每个发送机会的状态。
较佳地，D2D数据发送端按照与D2D数据接收端相同的方式，根据标识信息确定发送窗口内的每个发送机会的状态。
基于上述任一方法实施例，较佳地，D2D数据发送端确定发送窗口内每个发送机会的状态的一种实现方式可以是：D2D数据发送端按照与D2D数据接收端相同的方式，为发送窗口内的每个发送机会生成随机数；D2D数据发送端根据生成的随机数，确定对应的发送机会的状态。
具体的，D2D数据发送端可以根据标识信息为发送窗口内的每个发送机会生成随机数。
较佳地，D2D数据发送端确定发送窗口内每个发送机会的状态的具体实现方式还可以是：D2D数据发送端将标识信息作为伪随机序列的初始值，生成伪随机序列，伪随机序列的长度为发送窗口中发送机会的个数，伪随机序列的每一位对应发送窗口内的一个发送机会；根据伪随机序列每一位的取值确定对应的发送机会的状态。
应当指出的是，作为加扰序列的初始化标识信息的标识信息，作为DMRS序列的初始 化标识信息的标识信息，和/或确定发送机会状态所使用的标识信息可以是相同的标识信息，也可以是不同的标识信息。如果标识信息不同，则D2D数据发送端应分别将不同的标识信息发送给D2D数据接收端。
较佳地，D2D数据发送端根据生成的随机数，确定对应的发送机会的状态的具体实现方式可以是：D2D数据发送端判断该随机数是否达到设定阈值，如果达到，确定对应的发送机会的状态为发送数据状态，否则，确定对应的发送机会的状态为静默状态；其实现方式还可以是，D2D数据发送端判断该随机数对整数B取模的结果是否为b，b∈(0，B-1)，如果是，确定对应的发送机会的状态为发送数据状态，否则，确定对应的发送机会的状态为静默状态。
基于上述任一方法实施例，较佳地，每个发送机会的时长为一个子帧。
一种D2D数据传输方法，包括：
D2D数据接收端按照与D2D数据发送端相同的方式，确定发送窗口内每个发送机会的状态，发送窗口被均匀划分为多个发送机会，发送机会的状态分为发送数据状态和静默状态；
D2D数据接收端在该发送窗口中、每个发送数据状态的发送机会接收D2D数据发送端发送的D2D数据。
本发明实施例提供的技术方案，D2D数据发送端在不同资源(发送机会)上发送数据或静默，使得不同D2D数据发送端在资源上错开，从而减轻“远-近”效应的影响，使得D2D数据接收端能够正确接收到距离较远的D2D数据发送端发送的D2D数据。
较佳地，如果发送窗口中、每个发送数据状态的发送机会传输的关联于同一D2D数据的数据是相同的冗余版本，D2D数据接收端还可以对接收到的D2D数据进行chase合并；如果发送窗口中、每个发送数据状态的发送机会传输的关联于同一D2D数据的数据是不同的冗余版本，D2D数据接收端还可以对接收到的D2D数据进行IR合并。
基于上述任一接收端方法实施例，较佳地，D2D数据接收端还可以接收D2D数据发送端发送的标识信息。
标识信息可以是D2D数据发送端的MAC层地址信息的后N位；也可以是DMRS初始值的取值范围0～503中的任一取值；还可以是预定义的随机种子的索引信息。
标识信息可以用于发送窗口中D2D数据传输的加扰序列的初始化标识信息。
标识信息也可以用于发送窗口中D2D数据传输的DMRS序列的初始化标识信息。
标识信息也可以用于确定发送窗口中的每个发送机会的状态。
较佳地，D2D数据接收端按照与D2D数据发送端相同的方式，根据标识信息确定发送窗口内的每个发送机会的状态。
基于上述任一接收端方法实施例，较佳地，D2D数据接收端确定发送窗口内每个发送 机会的状态的一种实现方式可以是：D2D数据接收端按照与D2D数据发送端相同的方式，为发送窗口内的每个发送机会生成随机数；D2D数据接收端根据生成的随机数，确定对应的发送机会的状态。
具体的，D2D数据接收端可以根据标识信息为发送窗口内的每个发送机会生成随机数。
较佳地，D2D数据接收端确定发送窗口内的每个发送机会的状态的另一种实现方式可以是：D2D数据接收端将标识信息作为伪随机序列的初始值，生成伪随机序列，伪随机序列的长度为发送窗口中发送机会的个数，伪随机序列的每一位对应发送窗口内的一个发送机会；根据伪随机序列每一位的取值确定对应的发送机会的状态。
应当指出的是，作为加扰序列的初始化标识信息的标识信息，作为DMRS序列的初始化标识信息的标识信息，和/或确定发送机会状态所使用的标识信息可以是相同的标识信息，也可以是不同的标识信息。如果标识信息不同，则D2D数据接收端应分别接收到将不同的标识信息。
较佳地，D2D数据接收端根据生成的随机数，确定对应的发送机会的状态的具体实现方式可以是：D2D数据接收端判断该随机数是否达到设定阈值，如果达到，确定对应的发送机会的状态为发送数据状态，否则，确定对应的发送机会的状态为静默状态；其实现方式也可以是，D2D数据接收端判断随机数对整数B取模的结果是否为b，b∈(0，B-1)，如果是，确定对应的发送机会的状态为发送数据状态，否则，确定对应的发送机会的状态为静默状态。
基于上述任一接收端方法实施例，较佳地，每个发送机会的时长为一个子帧。
基于与方法同样的发明构思，本发明实施例还提供一种D2D数据发送端设备，包括：
状态确定模块，用于按照与D2D数据接收端相同的方式，确定发送窗口内每个发送机会的状态，所述发送窗口被均匀划分为多个发送机会，发送机会的状态包括发送数据状态和静默状态；
数据发送模块，用于在所述发送窗口中、每个发送数据状态的发送机会向所述D2D数据接收端发送D2D数据。
本发明实施例提供的技术方案，D2D数据发送端在不同资源(发送机会)上发送数据或静默，使得不同D2D数据发送端在资源上错开，从而减轻“远-近”效应的影响，使得D2D数据接收端能够正确接收到距离较远的D2D数据发送端发送的D2D数据。
较佳地，数据发送模块具体用于在所述发送窗口中、每个发送数据状态的发送机会向所述D2D数据接收端发送关联于同一D2D数据的数据。
较佳地，还包括标识信息发送模块，用于向所述D2D数据接收端发送标识信息。
较佳地，所述标识信息为：
所述D2D数据发送端的MAC层地址信息的后N位；或者，
DMRS初始值的取值范围0～503中的任一取值；或者，
预定义的随机种子的索引信息。
基于上述任一D2D数据发送端设备实施例，较佳地，所述标识信息用于所述发送窗口中D2D数据传输的加扰序列的初始化标识信息；和/或，所述标识信息用于所述发送窗口中D2D数据传输的DMRS序列的初始化标识信息；和/或，所述标识信息用于确定所述发送窗口中的每个发送机会的状态。
较佳地，所述状态确定模块具体用于：
按照与D2D数据接收端相同的方式，根据所述标识信息确定所述发送窗口内的每个发送机会的状态。
基于上述任一D2D数据发送端设备实施例，较佳地，所述状态确定模块具体用于：
所述D2D数据发送端按照与D2D数据接收端相同的方式，为所述发送窗口内的每个发送机会生成随机数；
所述D2D数据发送端根据生成的随机数，确定对应的发送机会的状态。
如果所述标识信息发送模块向所述D2D数据接收端发送标识信息，所述状态确定为所述发送窗口内的每个发送机会生成随机数时，具体用于：
根据所述标识信息为所述发送窗口内的每个发送机会生成随机数。
较佳地，所述状态确定模块根据生成的随机数，确定对应的发送机会的状态时，具体用于：
判断所述随机数是否达到设定阈值，如果达到，确定对应的发送机会的状态为发送数据状态，否则，确定对应的发送机会的状态为静默状态；或者，
判断所述随机数对整数B取模的结果是否为b，b∈(0，B-1)，如果是，确定对应的发送机会的状态为发送数据状态，否则，确定对应的发送机会的状态为静默状态。其中，所述发送窗口内的发送概率1/B。
较佳地，所述状态确定模块具体用于：
将所述标识信息作为伪随机序列的初始值，生成伪随机序列，所述伪随机序列的长度为所述发送窗口中发送机会的个数，所述伪随机序列的每一位对应所述发送窗口内的一个发送机会；
根据伪随机序列每一位的取值确定对应的发送机会的状态。
基于上述任一D2D数据发送端设备实施例，较佳地，每个发送机会的时长为一个子帧。
基于与方法同样的发明构思，本发明实施例还提供一种D2D UE，包括处理器和射频单元：
该处理器被配置为，按照与D2D数据接收端相同的方式，确定发送窗口内每个发送机 会的状态，所述发送窗口被均匀划分为多个发送机会，发送机会的状态包括发送数据状态和静默状态；
该射频单元被配置为，在所述发送窗口中、每个发送数据状态的发送机会向所述D2D数据接收端发送关联于同一D2D数据的数据。
本发明实施例提供的技术方案，D2D UE在不同资源(发送机会)上发送数据或静默，使得不同D2D数据发送端在资源上错开，从而减轻“远-近”效应的影响，使得D2D数据接收端能够正确接收到距离较远的D2D数据发送端发送的D2D数据。
基于与方法同样的发明构思，本发明实施例还提供一种D2D数据接收端设备，包括：
状态确定模块，用于按照与D2D数据发送端相同的方式，确定发送窗口内每个发送机会的状态，所述发送窗口被均匀划分为多个发送机会，发送机会的状态包括发送数据状态和静默状态；
数据接收模块，用于在所述发送窗口中、每个发送数据状态的发送机会接收所述D2D数据发送端发送的D2D数据。
本发明实施例提供的技术方案，D2D数据发送端在不同资源(发送机会)上发送数据或静默，使得不同D2D数据发送端在资源上错开，从而减轻“远-近”效应的影响，使得D2D数据接收端能够正确接收到距离较远的D2D数据发送端发送的D2D数据。
较佳地，所述数据接收模块还用于：
如果所述发送窗口中、每个发送数据状态的发送机会传输的关联于同一D2D数据的数据是相同的冗余版本，对接收到的D2D数据进行chase合并；
如果所述发送窗口中、每个发送数据状态的发送机会传输的关联于同一D2D数据的数据是不同的冗余版本，对接收到的D2D数据进行IR合并。
基于上述任一D2D数据接收端设备实施例，较佳地，还包括标识信息接收模块，用于接收所述D2D数据发送端发送的标识信息。
较佳地，所述标识信息为：
所述D2D数据发送端的MAC层地址信息的后N位；或者，
DMRS初始值的取值范围0～503中的任一取值；或者，
预定义的随机种子的索引信息。
较佳地，所述标识信息用于所述发送窗口中D2D数据传输的加扰序列的初始化标识信息；和/或，所述标识信息用于所述发送窗口中D2D数据传输的DMRS序列的初始化标识信息；和/或，所述标识信息用于确定所述发送窗口中的每个发送机会的状态。
较佳地，所述状态确定模块具体用于：
按照与D2D数据发送端相同的方式，根据所述标识信息确定所述发送窗口内的每个发送机会的状态。
基于上述任一D2D数据接收端设备实施例，较佳地，所述状态确定模块用于：
按照与D2D数据发送端相同的方式，为所述发送窗口内的每个发送机会生成随机数；
根据生成的随机数，确定对应的发送机会的状态。
如果所述标识信息接收模块接收所述D2D数据发送端发送的标识信息，所述状态确定模块为所述发送窗口内的每个发送机会生成随机数时，具体用于：根据所述标识信息为所述发送窗口内的每个发送机会生成随机数。
较佳地，所述状态确定模块根据生成的随机数，确定对应的发送机会的状态时，具体用于：
判断所述随机数是否达到设定阈值，如果达到，确定对应的发送机会的状态为发送数据状态，否则，确定对应的发送机会的状态为静默状态；或者，
判断所述随机数对整数B取模的结果是否为b，b∈(0，B-1)，如果是，确定对应的发送机会的状态为发送数据状态，否则，确定对应的发送机会的状态为静默状态。
较佳地，所述状态确定模块具体用于：
将所述标识信息作为伪随机序列的初始值，生成伪随机序列，所述伪随机序列的长度为所述发送窗口中发送机会的个数，所述伪随机序列的每一位对应所述发送窗口内的一个发送机会；
根据伪随机序列每一位的取值确定对应的发送机会的状态。
基于上述任一D2D数据接收端实施例，较佳地，每个发送机会的时长为一个子帧。
基于与方法同样的发明构思，本发明实施例还提供一种D2D UE，包括处理器和射频单元：
该处理器被配置为，按照与D2D数据发送端相同的方式，确定发送窗口内每个发送机会的状态，所述发送窗口被均匀划分为多个发送机会，发送机会的状态包括发送数据状态和静默状态；
该射频单元被配置为，在所述发送窗口中、每个发送数据状态的发送机会接收所述D2D数据发送端发送的D2D数据。
本发明实施例提供的技术方案，D2D数据发送端在不同资源(发送机会)上发送数据或静默，使得不同D2D数据发送端在资源上错开，从而减轻“远-近”效应的影响，使得D2D UE能够正确接收到距离较远的D2D数据发送端发送的D2D数据。
一种D2D用户设备UE，包括处理器、存储器和发送器，所述存储器中保存有预设的程序，所述处理器被配置为读取所述存储器中预设的程序，按照所述程序执行以下过程：
按照与D2D数据接收端相同的方式，确定发送窗口内每个发送机会的状态，所述发送窗口被均匀划分为多个发送机会，发送机会的状态包括发送数据状态和静默状态；
指示所述发送器在所述发送窗口中、每个发送数据状态的发送机会向所述D2D数据接 收端发送D2D数据。
一种D2D用户设备UE，包括处理器、存储器和发送器，所述存储器中保存有预设的程序，所述处理器被配置为读取所述存储器中预设的程序，按照所述程序执行以下过程：
按照与D2D数据发送端相同的方式，确定发送窗口内每个发送机会的状态，所述发送窗口被均匀划分为多个发送机会，发送机会的状态包括发送数据状态和静默状态；
指示所述接收器在所述发送窗口中、每个发送数据状态的发送机会接收所述D2D数据发送端发送的D2D数据。
附图说明
图1为本发明实施例提供的一种方法流程图；
图2为本发明实施例提供的发送窗口示意图；
图3为本发明实施例提供的另一种方法流程图；
图4为本发明实施例提供的D2D通信帧结构示意图；
图5为本发明实施例提供的D2D数据发送端设备示意图；
图6为本发明实施例提供的D2D数据接收端设备示意图。
具体实施方式
下面结合附图，对本发明实施例提供的技术方案进行详细说明。
本发明实施例提供了一种D2D数据传输方法，如图1所示，具体包括如下操作：
步骤100、D2D数据发送端(即Tx UE)按照与D2D数据接收端(即Rx UE)相同的方式，确定发送窗口内每个发送机会的状态。
其中，发送窗口既可以是指预定时域和频域范围内的物理资源，也可以是指预定的时域长度。
发送窗口被均匀划分为多个发送机会，发送机会的状态分为发送数据状态和静默状态。较佳地，在时域上将发送窗口划分为多个发送机会。如果发送窗口是指预定时域和频域范围内的物理资源，也可以在频域上将发送窗口划分为多个发送机会，还可以在时域和频域上将发送窗口划分为多个发送机会。
在LTE D2D系统中，一个发送机会的时长可以但不仅限于是1个子帧的时长(1毫秒)。
其中，Tx UE确定的发送机会的状态，是指其自身在该发送机会上的状态。
步骤110、Tx UE在该发送窗口中、每个发送数据状态的发送机会向Rx UE发送D2D数据。
一个具体实现中，Tx UE在该发送窗口中、每个发送数据状态的发送机会向Rx UE发送关联于同一D2D数据的数据。
本发明实施例中，关联于同一D2D数据的数据可以是指信源比特相同的D2D数据，包括D2D数据的重复、混合自动重传请求(HARQ)编码的递增冗余版本等。
LTE D2D系统中，Tx UE分别在不同的子信道上发送D2D数据。频域上一个子信道的带宽可以是一个或者多个物理资源块(PRB)，例如，可以是2、3、4个PRB。
其中，Tx UE在一个发送窗口中、每个发送数据状态的发送机会上发送的是相同信源比特的D2D数据。但每个发送数据状态的发送机会上发送的D2D数据经过调制编码及速率匹配后，如果采用的冗余版本相同，则实际传输的比特数相同，如果采用的冗余版本不同，则实际传输的比特数不同。无论实际传输的比特数是否相同，发送窗口中发送的D2D数据的信源比特相同。
其中，发送窗口的大小、发送机会的划分方式以及冗余版本可以是预定义的，也可以是由eNB(网络覆盖范围内)或簇头(网络覆盖范围外)配置并通过信令通知的。
以时域上将发送窗口划分为多个发送机会为例，Tx UE1和Tx UE2在同一发送窗口的各个发送机会的状态如图2所示。可见，本发明实施例提供的技术方案，不同Tx UE在不同资源(发送机会)上发送数据或静默，使得不同Tx UE在资源上错开，从而减轻“远-近”效应的影响，使得Rx UE能够正确接收到距离较远的Tx UE发送的D2D数据。
Tx UE确定发送窗口内每个发送机会的状态的实现方式有多种，只要按照与Rx UE相同的方式即可。一种较佳的实现方式可以是：Tx UE按照与Rx UE相同的方式，为发送窗口内的每个发送机会生成随机数；Tx UE根据生成的随机数，确定对应的发送机会的状态。具体的，Tx UE可以根据标识信息为发送窗口内的每个发送机会生成随机数。另一种较佳地实现方式还可以是：Tx UE将标识信息作为伪随机序列的初始值，生成伪随机序列，伪随机序列的长度为发送窗口中发送机会的个数，伪随机序列的每一位对应发送窗口内的一个发送机会；根据伪随机序列每一位的取值确定对应的发送机会的状态。
相应的，Tx UE还可以向Rx UE发送标识信息。
用于确定发送机会的状态的标识信息需要使得Tx UE之间在资源上错开，同时要避免过多的控制信令开销。较佳地，标识信息可以是Tx UE的媒体接入控制(MAC)层地址信息的后N位；也可以是解调参考信号(DMRS)初始值的取值范围0～503中的任一取值；还可以是预定义的随机种子的索引信息等等。
较佳地，标识信息还可以用于发送窗口中D2D数据传输的加扰序列的初始化标识信息。
较佳地，标识信息也可以用于发送窗口中D2D数据传输的DMRS序列的初始化标识信息。
应当指出的是，作为加扰序列的初始化标识信息的标识信息，作为DMRS序列的初始化标识信息的标识信息，和/或确定发送机会状态所使用的标识信息可以是相同的标识信息，也可以是不同的标识信息。另外，实际应用中，可以仅通过标识信息确定发送机会状态，可以仅将标识信息作为加扰序列的初始化标识信息，可以仅将标识信息作为DMRS序 列的初始化标识信息，也可以相互配合使用。如果标识信息不同，则Tx UE应分别将不同的标识信息发送给Rx UE。
上述实施例中，Tx UE根据标识信息为发送窗口内的每个发送机会生成随机数的实现方式有多种，较佳地，根据标识信息，按照下述公式为发送窗口内的每个发送机会生成随机数Yk：
Yk＝(A-Yk-1)modD
其中，k取1时，Yk-1＝Y-1，Y-1＝nid,nid表示标识信息，A＝39827,D＝65537，k表示发送窗口中发送机会的编号。
上述实施例中，Tx UE根据生成的随机数，确定对应的发送机会的状态的实现方式有多种。一种较佳地实现方式可以是：Tx UE判断该随机数是否达到设定阈值，如果达到，确定对应的发送机会的状态为发送数据状态，否则，确定对应的发送机会的状态为静默状态。以上述公式确定的随机数Yk为例，如果定义Tx UE在一个发送机会发送D2D数据的概率为a(a是0～1之间的实数，可以是预定义的，也可以是配置的)，那么如果
Figure PCTCN2015070793-appb-000001
则认为Tx UE在发送机会k的状态是发送数据状态，否则，则认为Tx UE在发送机会k中处于静默状态。另一种较佳地实现方式还可以是，Tx UE判断该随机数对整数B取模的结果是否为b，b∈(0，B-1)，如果是，确定对应的发送机会的状态为发送数据状态，否则，确定对应的发送机会的状态为静默状态。
本发明实施例提供的另一种D2D数据传输方法如图3所示，具体包括如下操作：
步骤300、RX UE按照与TX UE相同的方式，确定发送窗口内每个发送机会的状态。
其中，发送窗口被均匀划分为多个发送机会，发送机会的状态分为发送数据状态和静默状态。
发送窗口的大小、划分方式等等信息可以是预定义的，也可以是由eNB配置的(网络覆盖范围内)，也可以是由簇头配置的(网络覆盖范围外)。
步骤310、Rx UE在该发送窗口中、每个发送数据状态的发送机会接收Tx UE发送的D2D数据。
本发明实施例提供的技术方案，Tx UE在不同资源(发送机会)上发送数据或静默，使得不同Tx UE在资源上错开，从而减轻“远-近”效应的影响，使得Rx UE能够正确接收到距离较远的Tx UE发送的D2D数据。
较佳地，如果发送窗口中、每个发送数据状态的发送机会传输的关联于同一D2D数据的数据是相同的冗余版本，Rx UE还可以对接收到的D2D数据进行chase合并；如果发送窗口中、每个发送数据状态的发送机会传输的关联于同一D2D数据的数据是不同的冗余版本，RX UE还可以对接收到的D2D数据进行增量冗余(Incremental Redundancy，IR)合 并。
基于上述任一接收端方法实施例，较佳地，Rx UE还可以接收Tx UE发送的标识信息。
标识信息可以是Tx UE的MAC层地址信息的后N位；也可以是DMRS初始值的取值范围0～503中的任一取值；还可以是预定义的随机种子的索引信息。
标识信息可以用于发送窗口中D2D数据传输的加扰序列的初始化标识信息。
标识信息也可以用于发送窗口中D2D数据传输的DMRS序列的初始化标识信息。
基于上述任一接收端方法实施例，较佳地，Rx UE确定发送窗口内每个发送机会的状态的一种实现方式可以是：Rx UE按照与Tx UE相同的方式，为发送窗口内的每个发送机会生成随机数；Rx UE根据生成的随机数，确定对应的发送机会的状态。
具体的，Rx UE可以根据标识信息为发送窗口内的每个发送机会生成随机数。
较佳地，Rx UE确定发送窗口内的每个发送机会的状态的另一种实现方式可以是：Rx UE将标识信息作为伪随机序列的初始值，生成伪随机序列，伪随机序列的长度为发送窗口中发送机会的个数，伪随机序列的每一位对应发送窗口内的一个发送机会；根据伪随机序列每一位的取值确定对应的发送机会的状态。
应当指出的是，作为加扰序列的初始化标识信息的标识信息，作为DMRS序列的初始化标识信息的标识信息，和/或确定发送机会状态所使用的标识信息可以是相同的标识信息，也可以是不同的标识信息。如果标识信息不同，则Rx UE应分别接收到将不同的标识信息。
较佳地，Rx UE根据生成的随机数，确定对应的发送机会的状态的具体实现方式有多种，具体可以参照上述Tx UE侧实施例的描述。其实现方式可以是：Rx UE判断该随机数是否达到设定阈值，如果达到，确定对应的发送机会的状态为发送数据状态，否则，确定对应的发送机会的状态为静默状态；其实现方式也可以是，Rx UE判断随机数对整数B取模的结果是否为b，b∈(0，B-1)，如果是，确定对应的发送机会的状态为发送数据状态，否则，确定对应的发送机会的状态为静默状态。
基于上述任一接收端方法实施例，较佳地，每个发送机会的时长为一个子帧。
下面结合具体应用场景，对本发明实施例提供的方法进行详细说明。
如图4所示，D2D通信帧由控制信道和至少一个发送窗口构成。发送窗口又由多个子帧构成，每个子帧为一个发送机会。
基于图4所示的帧结构，Tx UE在发送D2D数据前，通过控制信道发送用于确定子帧状态的标识信息。当然，Tx UE在控制信道上也可以采用类似于发送窗口的发送/静默方式。但由于控制信道发送时，Rx UE无法获知先验的标识信息，因此Rx UE无法确定控制信道的状态，其需要在整个控制信道可能发送的时长内一直接收，直到接收正确接收到标识信息等控制信息。对于发送窗口内的数据，Tx UE根据上述实施例提供的方法确定每个子帧 的状态，进而在数据发送状态的子帧上发送D2D数据。假设发送窗口的长度是N个子帧，在一个发送窗口内部发送的数据都是信源比特相同的数据，且假定发送是相同的冗余版本。Rx UE根据在控制信道中接收到的标识信息，确定Tx UE在一个发送窗口内的子帧状态的图样，从而对应的对发送数据状态的子帧进行数据接收，并且可以根据发送的冗余版本进行合并处理，提高数据接收的可靠性。
基于与方法同样的发明构思，本发明实施例还提供一种D2D数据发送端设备，如图5所示，包括：
状态确定模块501，用于按照与D2D数据接收端相同的方式，确定发送窗口内每个发送机会的状态，所述发送窗口被均匀划分为多个发送机会，发送机会的状态包括发送数据状态和静默状态；
数据发送模块502，用于在所述发送窗口中、每个发送数据状态的发送机会向所述D2D数据接收端发送D2D数据。
本发明实施例提供的技术方案，D2D数据发送端在不同资源(发送机会)上发送数据或静默，使得不同D2D数据发送端在资源上错开，从而减轻“远-近”效应的影响，使得D2D数据接收端能够正确接收到距离较远的D2D数据发送端发送的D2D数据。
较佳地，数据发送模块用于在所述发送窗口中、每个发送数据状态的发送机会向所述D2D数据接收端发送关联于同一D2D数据的数据。
较佳地，还包括标识信息发送模块，用于向所述D2D数据接收端发送标识信息。
较佳地，所述标识信息为：
所述D2D数据发送端的MAC层地址信息的后N位；或者，
DMRS初始值的取值范围0～503中的任一取值；或者，
预定义的随机种子的索引信息。
基于上述任一D2D数据发送端设备实施例，较佳地，所述标识信息用于所述发送窗口中D2D数据传输的加扰序列的初始化标识信息；和/或，所述标识信息用于所述发送窗口中D2D数据传输的DMRS序列的初始化标识信息。
基于上述任一D2D数据发送端设备实施例，较佳地，所述状态确定模块501具体用于：
所述D2D数据发送端按照与D2D数据接收端相同的方式，为所述发送窗口内的每个发送机会生成随机数；
所述D2D数据发送端根据生成的随机数，确定对应的发送机会的状态。
如果所述标识信息发送模块向所述D2D数据接收端发送标识信息，所述状态确定模块501为所述发送窗口内的每个发送机会生成随机数时，具体用于：
根据所述标识信息为所述发送窗口内的每个发送机会生成随机数。
较佳地，所述状态确定模块501根据生成的随机数，确定对应的发送机会的状态时， 具体用于：
判断所述随机数是否达到设定阈值，如果达到，确定对应的发送机会的状态为发送数据状态，否则，确定对应的发送机会的状态为静默状态；或者，
判断所述随机数对整数B取模的结果是否为b，b∈(0，B-1)，如果是，确定对应的发送机会的状态为发送数据状态，否则，确定对应的发送机会的状态为静默状态。
较佳地，所述状态确定模块501具体用于：
将所述标识信息作为伪随机序列的初始值，生成伪随机序列，所述伪随机序列的长度为所述发送窗口中发送机会的个数，所述伪随机序列的每一位对应所述发送窗口内的一个发送机会；
根据伪随机序列每一位的取值确定对应的发送机会的状态。
基于上述任一D2D数据发送端设备实施例，较佳地，每个发送机会的时长为一个子帧。
基于与方法同样的发明构思，本发明实施例还提供一种D2D UE，包括处理器、存储器和发送器，存储器用于保存预设的程序，处理器被配置为读取存储器中预设的程序，按照该程序执行以下过程：
按照与D2D数据接收端相同的方式，确定发送窗口内每个发送机会的状态，所述发送窗口被均匀划分为多个发送机会，发送机会的状态包括发送数据状态和静默状态；
指示发送器在所述发送窗口中、每个发送数据状态的发送机会向所述D2D数据接收端发送D2D数据。
本发明实施例提供的技术方案，D2D UE在不同资源(发送机会)上发送数据或静默，使得不同D2D数据发送端在资源上错开，从而减轻“远-近”效应的影响，使得D2D数据接收端能够正确接收到距离较远的D2D数据发送端发送的D2D数据。
较佳地，处理器指示发送器在所述发送窗口中、每个发送数据状态的发送机会向所述D2D数据接收端发送关联于同一D2D数据的数据。
基于与方法同样的发明构思，本发明实施例还提供一种D2D数据接收端设备，如图6所示，具体包括：
状态确定模块601，用于按照与D2D数据发送端相同的方式，确定发送窗口内每个发送机会的状态，所述发送窗口被均匀划分为多个发送机会，发送机会的状态包括发送数据状态和静默状态；
数据接收模块602，用于在所述发送窗口中、每个发送数据状态的发送机会接收所述D2D数据发送端发送的D2D数据。
本发明实施例提供的技术方案，D2D数据发送端在不同资源(发送机会)上发送数据或静默，使得不同D2D数据发送端在资源上错开，从而减轻“远-近”效应的影响，使得D2D数据接收端能够正确接收到距离较远的D2D数据发送端发送的D2D数据。
较佳地，所述数据接收模块602还用于：
如果所述发送窗口中、每个发送数据状态的发送机会传输的关联于同一D2D数据的数据是相同的冗余版本，对接收到的D2D数据进行chase合并；
如果所述发送窗口中、每个发送数据状态的发送机会传输的关联于同一D2D数据的数据是不同的冗余版本，对接收到的D2D数据进行IR合并。
基于上述任一D2D数据接收端设备实施例，较佳地，还包括标识信息接收模块，用于接收所述D2D数据发送端发送的标识信息。
较佳地，所述标识信息为：
所述D2D数据发送端的MAC层地址信息的后N位；或者，
DMRS初始值的取值范围0～503中的任一取值；或者，
预定义的随机种子的索引信息。
较佳地，所述标识信息用于所述发送窗口中D2D数据传输的加扰序列的初始化标识信息；和/或，所述标识信息用于所述发送窗口中D2D数据传输的DMRS序列的初始化标识信息。
基于上述任一D2D数据接收端设备实施例，较佳地，所述状态确定模块601用于：
按照与D2D数据发送端相同的方式，为所述发送窗口内的每个发送机会生成随机数；
根据生成的随机数，确定对应的发送机会的状态。
如果所述标识信息接收模块接收所述D2D数据发送端发送的标识信息，所述状态确定模块为所述发送窗口内的每个发送机会生成随机数时，具体用于：根据所述标识信息为所述发送窗口内的每个发送机会生成随机数。
较佳地，所述状态确定模块601根据生成的随机数，确定对应的发送机会的状态时，具体用于：
判断所述随机数是否达到设定阈值，如果达到，确定对应的发送机会的状态为发送数据状态，否则，确定对应的发送机会的状态为静默状态；或者，
判断所述随机数对整数B取模的结果是否为b，b∈(0，B-1)，如果是，确定对应的发送机会的状态为发送数据状态，否则，确定对应的发送机会的状态为静默状态。
较佳地，所述状态确定模块601具体用于：
将所述标识信息作为伪随机序列的初始值，生成伪随机序列，所述伪随机序列的长度为所述发送窗口中发送机会的个数，所述伪随机序列的每一位对应所述发送窗口内的一个发送机会；
根据伪随机序列每一位的取值确定对应的发送机会的状态。
基于上述任一D2D数据接收端实施例，较佳地，每个发送机会的时长为一个子帧。
基于与方法同样的发明构思，本发明实施例还提供一种D2D UE，包括处理器、存储 器和接收器，其中，存储器中保存有预设的程序，处理器被配置为读取存储器中预设的程序，按照该程序执行以下过程：
按照与D2D数据发送端相同的方式，确定发送窗口内每个发送机会的状态，所述发送窗口被均匀划分为多个发送机会，发送机会的状态包括发送数据状态和静默状态；
指示接收器在所述发送窗口中、每个发送数据状态的发送机会接收所述D2D数据发送端发送的D2D数据。
本发明实施例提供的技术方案，D2D数据发送端在不同资源(发送机会)上发送数据或静默，使得不同D2D数据发送端在资源上错开，从而减轻“远-近”效应的影响，使得D2D UE能够正确接收到距离较远的D2D数据发送端发送的D2D数据。
本领域内的技术人员应明白，本发明的实施例可提供为方法、系统、或计算机程序产品。因此，本发明可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本发明可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本发明是参照根据本发明实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
尽管已描述了本发明的优选实施例，但本领域内的技术人员一旦得知了基本创造性概念，则可对这些实施例作出另外的变更和修改。所以，所附权利要求意欲解释为包括优选实施例以及落入本发明范围的所有变更和修改。
显然，本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和 范围。这样，倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内，则本发明也意图包含这些改动和变型在内。

Claims (42)

  1. 一种D2D数据传输方法，其特征在于，包括：
    D2D数据发送端按照与D2D数据接收端相同的方式，确定发送窗口内每个发送机会的状态，所述发送窗口被均匀划分为多个发送机会，发送机会的状态包括发送数据状态和静默状态；
    所述D2D数据发送端在所述发送窗口中、每个发送数据状态的发送机会向所述D2D数据接收端发送D2D数据。
  2. 根据权利要求1所述的方法，其特征在于，所述D2D数据发送端在所述发送窗口中、每个发送数据状态的发送机会向所述D2D数据接收端发送D2D数据，包括：
    所述D2D数据发送端在所述发送窗口中、每个发送数据状态的发送机会向所述D2D数据接收端发送关联于同一D2D数据的数据。
  3. 根据权利要求2所述的方法，其特征在于，该方法还包括：
    所述D2D数据发送端向所述D2D数据接收端发送标识信息。
  4. 根据权利要求3所述的方法，其特征在于，所述标识信息为：
    所述D2D数据发送端的MAC层地址信息的后N位；或者，
    DMRS初始值的取值范围0～503中的任一取值；或者，
    预定义的随机种子的索引信息。
  5. 根据权利要求3或4所述的方法，其特征在于，所述标识信息用于所述发送窗口中D2D数据传输的加扰序列的初始化标识信息；和/或，
    所述标识信息用于所述发送窗口中D2D数据传输的DMRS序列的初始化标识信息；和/或，
    所述标识信息用于确定所述发送窗口中的每个发送机会的状态。
  6. 根据权利要求5所述的方法，其特征在于，用于所述发送窗口中D2D数据传输的加扰序列的初始化标识信息、用于所述发送窗口中D2D数据传输的DMRS序列的初始化标识信息和/或用于确定所述发送窗口中的每个发送机会的状态的标识信息相同或不同；
    若不同，所述D2D数据发送端向所述D2D数据接收端发送标识信息，包括：
    所述D2D数据发送端分别将不同的标识信息发送给所述D2D数据接收端。
  7. 根据权利要求3或4所述的方法，其特征在于，所述D2D数据发送端按照与D2D数据接收端相同的方式，确定发送窗口内每个发送机会的状态，包括：
    所述D2D数据发送端按照与D2D数据接收端相同的方式，根据所述标识信息确定所述发送窗口内的每个发送机会的状态。
  8. 根据权利要求7所述的方法，其特征在于，所述D2D数据发送端按照与D2D数据接收端相同的方式，确定发送窗口内每个发送机会的状态，包括：
    所述D2D数据发送端按照与D2D数据接收端相同的方式，根据所述标识信息为所述发送窗口内的每个发送机会生成随机数；
    所述D2D数据发送端根据生成的随机数，确定对应的发送机会的状态。
  9. 根据权利要求8所述的方法，其特征在于，所述D2D数据发送端根据生成的随机数，确定对应的发送机会的状态，包括：
    所述D2D数据发送端判断所述随机数是否达到设定阈值，如果达到，确定对应的发送机会的状态为发送数据状态，否则，确定对应的发送机会的状态为静默状态；或者，
    所述D2D数据发送端判断所述随机数对整数B取模的结果是否为b，b∈(0，B-1)，如果是，确定对应的发送机会的状态为发送数据状态，否则，确定对应的发送机会的状态为静默状态。
  10. 根据权利要求3或4所述的方法，其特征在于，所述D2D数据发送端按照与D2D数据接收端相同的方式，确定发送窗口内每个发送机会的状态，包括：
    所述D2D数据发送端将所述标识信息作为伪随机序列的初始值，生成伪随机序列，所述伪随机序列的长度为所述发送窗口中发送机会的个数，所述伪随机序列的每一位对应所述发送窗口内的一个发送机会；
    根据伪随机序列每一位的取值确定对应的发送机会的状态。
  11. 一种D2D数据传输方法，其特征在于，包括：
    D2D数据接收端按照与D2D数据发送端相同的方式，确定发送窗口内每个发送机会的状态，所述发送窗口被均匀划分为多个发送机会，发送机会的状态包括发送数据状态和静默状态；
    所述D2D数据接收端在所述发送窗口中、每个发送数据状态的发送机会接收所述D2D数据发送端发送的数据。
  12. 根据权利要求11所述的方法，其特征在于，该方法还包括：
    如果所述发送窗口中、每个发送数据状态的发送机会传输的关联于同一D2D数据的数据是相同的冗余版本，对接收到的D2D数据进行chase合并；
    如果所述发送窗口中、每个发送数据状态的发送机会传输的关联于同一D2D数据的数据是不同的冗余版本，对接收到的D2D数据进行IR合并。
  13. 根据权利要求11所述的方法，其特征在于，该方法还包括：
    所述D2D数据接收端接收所述D2D数据发送端发送的标识信息。
  14. 根据权利要求13所述的方法，其特征在于，所述标识信息为：
    所述D2D数据发送端的MAC层地址信息的后N位；或者，
    DMRS初始值的取值范围0～503中的任一取值；或者，
    预定义的随机种子的索引信息。
  15. 根据权利要求13或14所述的方法，其特征在于，所述标识信息用于所述发送窗口中D2D数据传输的加扰序列的初始化标识信息；和/或，
    所述标识信息用于所述发送窗口中D2D数据传输的DMRS序列的初始化标识信息；和/或，
    所述标识信息用于确定所述发送窗口中的每个发送机会的状态。
  16. 根据权利要求15所述的方法，其特征在于，用于所述发送窗口中D2D数据传输的加扰序列的初始化标识信息、用于所述发送窗口中D2D数据传输的DMRS序列的初始化标识信息和/或用于确定所述发送窗口中的每个发送机会的状态的标识信息相同或不同；
    若不同，所述D2D数据接收端接收所述D2D数据发送端发送的标识信息，包括：
    所述D2D数据接收端分别接收所述D2D数据发送端发送的不同的标识信息。
  17. 根据权利要求13或14所述的方法，其特征在于，D2D数据接收端按照与D2D数据发送端相同的方式，确定发送窗口内每个发送机会的状态，包括：
    所述D2D数据接收端按照与D2D数据发送端相同的方式，根据所述标识信息确定所述发送窗口内的每个发送机会的状态。
  18. 根据权利要求13或14所述的方法，其特征在于，D2D数据接收端按照与D2D数据发送端相同的方式，确定发送窗口内每个发送机会的状态，包括：
    所述D2D数据接收端按照与D2D数据发送端相同的方式，根据所述标识信息为所述发送窗口内的每个发送机会生成随机数；
    所述D2D数据接收端根据生成的随机数，确定对应的发送机会的状态。
  19. 根据权利要求18所述的方法，其特征在于，所述D2D数据接收端根据生成的随机数，确定对应的发送机会的状态，包括：
    所述D2D数据接收端判断所述随机数是否达到设定阈值，如果达到，确定对应的发送机会的状态为发送数据状态，否则，确定对应的发送机会的状态为静默状态；或者，
    所述D2D数据接收端判断所述随机数对整数B取模的结果是否为b，b∈(0，B-1)，如果是，确定对应的发送机会的状态为发送数据状态，否则，确定对应的发送机会的状态为静默状态。
  20. 根据权利要求13或14所述的方法，其特征在于，确定发送窗口内每个发送机会的状态，包括：
    所述D2D数据接收端将所述标识信息作为伪随机序列的初始值，生成伪随机序列，所述伪随机序列的长度为所述发送窗口中发送机会的个数，所述伪随机序列的每一位对应所述发送窗口内的一个发送机会；
    根据伪随机序列每一位的取值确定对应的发送机会的状态。
  21. 一种D2D数据发送端设备，其特征在于，包括：
    状态确定模块，用于按照与D2D数据接收端相同的方式，确定发送窗口内每个发送机会的状态，所述发送窗口被均匀划分为多个发送机会，发送机会的状态包括发送数据状态和静默状态；
    数据发送模块，用于在所述发送窗口中、每个发送数据状态的发送机会向所述D2D数据接收端发送D2D数据。
  22. 根据权利要求21所述的设备，其特征在于，所述数据发送模块具体用于：
    在所述发送窗口中、每个发送数据状态的发送机会向所述D2D数据接收端发送关联于同一D2D数据的数据。
  23. 根据权利要求22所述的设备，其特征在于，还包括标识信息发送模块，用于向所述D2D数据接收端发送标识信息。
  24. 根据权利要求23所述的设备，其特征在于，所述标识信息为：
    所述D2D数据发送端的MAC层地址信息的后N位；或者，
    DMRS初始值的取值范围0～503中的任一取值；或者，
    预定义的随机种子的索引信息。
  25. 根据权利要求23或24所述的设备，其特征在于，所述标识信息用于所述发送窗口中D2D数据传输的加扰序列的初始化标识信息；和/或，
    所述标识信息用于所述发送窗口中D2D数据传输的DMRS序列的初始化标识信息；和/或，
    所述标识信息用于确定所述发送窗口中的每个发送机会的状态。
  26. 根据权利要求25所述的设备，其特征在于，用于所述发送窗口中D2D数据传输的加扰序列的初始化标识信息、用于所述发送窗口中D2D数据传输的DMRS序列的初始化标识信息和/或用于确定所述发送窗口中的每个发送机会的状态的标识信息相同或不同；
    若不同，所述标识信息发送模块，具体用于：
    分别将不同的标识信息发送给所述D2D数据接收端。
  27. 根据权利要求23或24所述的设备，其特征在于，所述状态确定模块具体用于：
    按照与D2D数据接收端相同的方式，根据所述标识信息确定所述发送窗口内的每个发送机会的状态。
  28. 根据权利要求23或24所述的设备，其特征在于，所述状态确定模块具体用于：
    所述D2D数据发送端按照与D2D数据接收端相同的方式，根据所述标识信息为所述发送窗口内的每个发送机会生成随机数；
    所述D2D数据发送端根据生成的随机数，确定对应的发送机会的状态。
  29. 根据权利要求28所述的设备，其特征在于，所述状态确定模块根据生成的随机数，确定对应的发送机会的状态时，具体用于：
    判断所述随机数是否达到设定阈值，如果达到，确定对应的发送机会的状态为发送数据状态，否则，确定对应的发送机会的状态为静默状态；或者，
    判断所述随机数对整数B取模的结果是否为b，b∈(0，B-1)，如果是，确定对应的发送机会的状态为发送数据状态，否则，确定对应的发送机会的状态为静默状态。
  30. 根据权利要求23或24所述的设备，其特征在于，所述状态确定模块具体用于：
    将所述标识信息作为伪随机序列的初始值，生成伪随机序列，所述伪随机序列的长度为所述发送窗口中发送机会的个数，所述伪随机序列的每一位对应所述发送窗口内的一个发送机会；
    根据伪随机序列每一位的取值确定对应的发送机会的状态。
  31. 一种D2D数据接收端设备，其特征在于，包括：
    状态确定模块，用于按照与D2D数据发送端相同的方式，确定发送窗口内每个发送机会的状态，所述发送窗口被均匀划分为多个发送机会，发送机会的状态包括发送数据状态和静默状态；
    数据接收模块，用于在所述发送窗口中、每个发送数据状态的发送机会接收所述D2D数据发送端发送的D2D数据。
  32. 根据权利要求31所述的设备，其特征在于，所述数据接收模块还用于：
    如果所述发送窗口中、每个发送数据状态的发送机会传输的关联于同一D2D数据的数据是相同的冗余版本，对接收到的D2D数据进行chase合并；
    如果所述发送窗口中、每个发送数据状态的发送机会传输的关联于同一D2D数据的数据是不同的冗余版本，对接收到的D2D数据进行IR合并。
  33. 根据权利要求31所述的设备，其特征在于，还包括标识信息接收模块，用于接收所述D2D数据发送端发送的标识信息。
  34. 根据权利要求33所述的设备，其特征在于，所述标识信息为：
    所述D2D数据发送端的MAC层地址信息的后N位；或者，
    DMRS初始值的取值范围0～503中的任一取值；或者，
    预定义的随机种子的索引信息。
  35. 根据权利要求33或34所述的设备，其特征在于，所述标识信息用于所述发送窗口中D2D数据传输的加扰序列的初始化标识信息；和/或，
    所述标识信息用于所述发送窗口中D2D数据传输的DMRS序列的初始化标识信息；和/或，
    所述标识信息用于确定所述发送窗口中的每个发送机会的状态。
  36. 根据权利要求35所述的设备，其特征在于，用于所述发送窗口中D2D数据传输的加扰序列的初始化标识信息、用于所述发送窗口中D2D数据传输的DMRS序列的初始 化标识信息和/或用于确定所述发送窗口中的每个发送机会的状态的标识信息相同或不同；
    若不同，标识信息接收模块具体用于：
    分别接收所述D2D数据发送端发送的不同的标识信息。
  37. 根据权利要求33或34所述的设备，其特征在于，所述状态确定模块具体用于：
    按照与D2D数据发送端相同的方式，根据所述标识信息确定所述发送窗口内的每个发送机会的状态。
  38. 根据权利要求33或34所述的设备，其特征在于，所述状态确定模块用于：
    按照与D2D数据发送端相同的方式，根据所述标识信息为所述发送窗口内的每个发送机会生成随机数；
    根据生成的随机数，确定对应的发送机会的状态。
  39. 根据权利要求38所述的设备，其特征在于，所述状态确定模块根据生成的随机数，确定对应的发送机会的状态时，具体用于：
    判断所述随机数是否达到设定阈值，如果达到，确定对应的发送机会的状态为发送数据状态，否则，确定对应的发送机会的状态为静默状态；或者，
    判断所述随机数对整数B取模的结果是否为b，b∈(0，B-1)，如果是，确定对应的发送机会的状态为发送数据状态，否则，确定对应的发送机会的状态为静默状态。
  40. 根据权利要求33或34所述的设备，其特征在于，所述状态确定模块具体用于：
    将所述标识信息作为伪随机序列的初始值，生成伪随机序列，所述伪随机序列的长度为所述发送窗口中发送机会的个数，所述伪随机序列的每一位对应所述发送窗口内的一个发送机会；
    根据伪随机序列每一位的取值确定对应的发送机会的状态。
  41. 一种D2D用户设备UE，其特征在于，包括处理器、存储器和发送器，所述存储器中保存有预设的程序，所述处理器被配置为读取所述存储器中预设的程序，按照所述程序执行以下过程：
    按照与D2D数据接收端相同的方式，确定发送窗口内每个发送机会的状态，所述发送窗口被均匀划分为多个发送机会，发送机会的状态包括发送数据状态和静默状态；
    指示所述发送器在所述发送窗口中、每个发送数据状态的发送机会向所述D2D数据接收端发送D2D数据。
  42. 一种D2D用户设备UE，其特征在于，包括处理器、存储器和发送器，所述存储器中保存有预设的程序，所述处理器被配置为读取所述存储器中预设的程序，按照所述程序执行以下过程：
    按照与D2D数据发送端相同的方式，确定发送窗口内每个发送机会的状态，所述发送窗口被均匀划分为多个发送机会，发送机会的状态包括发送数据状态和静默状态；
    指示所述接收器在所述发送窗口中、每个发送数据状态的发送机会接收所述D2D数据发送端发送的D2D数据。
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