WO2016119250A1 - Procédé de transmission de données, équipement utilisateur, système et équipement de transmission - Google Patents

Procédé de transmission de données, équipement utilisateur, système et équipement de transmission Download PDF

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Publication number
WO2016119250A1
WO2016119250A1 PCT/CN2015/072027 CN2015072027W WO2016119250A1 WO 2016119250 A1 WO2016119250 A1 WO 2016119250A1 CN 2015072027 W CN2015072027 W CN 2015072027W WO 2016119250 A1 WO2016119250 A1 WO 2016119250A1
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Prior art keywords
cell
time
data transmission
time information
data
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PCT/CN2015/072027
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English (en)
Chinese (zh)
Inventor
郑娟
官磊
闫志宇
柯柏安
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华为技术有限公司
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Priority to PCT/CN2015/072027 priority Critical patent/WO2016119250A1/fr
Priority to CN201580005952.5A priority patent/CN106031073B/zh
Publication of WO2016119250A1 publication Critical patent/WO2016119250A1/fr

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    • 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

Definitions

  • the present invention relates to the field of wireless communication technologies, and in particular, to a data transmission method, a user equipment, a transmission device, and a system.
  • the spectrum is the basis of wireless communication.
  • a Long Term Long (LTE) system and a non-LTE system device for example, a Wireless Fidelity (WiFi) device
  • WiFi Wireless Fidelity
  • the LTE system may use the form of a secondary cell configuration or independently use the unlicensed spectrum.
  • the data transmission method can ensure normal data communication between LTE devices, which is an urgent problem to be solved.
  • the embodiments of the present invention provide a data transmission method, a user equipment, a base station device, and a system, which can determine time information on an unlicensed spectrum, ensure normal data communication between LTE devices, and have high efficiency and resources for using spectrum resources.
  • a first aspect of the embodiments of the present invention provides a data transmission method, including:
  • the data for performing data transmission does not include time information of the first cell.
  • the data for performing data transmission does not include time information of the first cell at a specific moment, the specific moment Including any time between the M time and the N time, the M time represents a data transmission start time of the first cell, and the N time represents that the first cell carries the The data transmission start time of the time information of a cell.
  • the data for data transmission is generated from data bit generation to at least a process experienced by the antenna An operation does not include time information of the first cell, and the process of the experience includes at least one of the following operations: scrambling code, modulation mapping, layer mapping, precoding, resource element mapping, OFDM signal generation, change precoding, SC-FDMA signal generation, antenna port mapping.
  • the initialization value of the scrambling code sequence used by the data transmission data does not include time information.
  • the determining manner of the initial value of the scrambling code sequence used by the data transmission data includes:
  • the initial value of the scrambling code sequence used by the data carried by the PDSCH is The A represents any real number that is independent of the first cell time information, the n RNTI represents a radio network temporary identification RNTI corresponding to the PDSCH, and the q represents an arbitrary value related to the number of codewords, An identification ID of a cell indicating data transmission;
  • the initial value of the scrambling code sequence used by the data carried by the PMCH is The I represents any real number that is independent of the first cell time information, Representing an identification ID corresponding to the MBSFN of the multimedia broadcast multicast service single frequency network;
  • the initial value of the scrambling code sequence used by the data carried by the PCFICH is The B represents any real number that is independent of the first cell time information, An identification ID of a cell indicating data transmission;
  • the initial value of the scrambling code sequence used by the data carried by the PDCCH is The C represents any real number that is independent of the first cell time information, An identification ID of a cell indicating data transmission;
  • the initial value of the scrambling code sequence used by the data carried by the EPDCCH is The D represents any real number that is independent of the first cell time information, Indicates an ID of an EPDCCH, where m represents an EPDCCH set label;
  • the initial value of the scrambling code sequence used by the data carried by the PHICH is The E represents any real number that is independent of the first cell time information, An identification ID of a cell indicating data transmission;
  • the initial value of the scrambling code sequence used by the CRS or the PRS generation is The F represents any real number that is independent of the first cell time information, and the l represents an OFDM symbol index in one subframe, and the value of the N CP is related to a CP type, and the CP type includes a normal CP and Extended CP, said An identification ID of a cell indicating data transmission;
  • the initialization value of the scrambling code sequence used by the MBSFN RS generation is The G represents any real number that is independent of the first cell time information, and the l represents an OFDM symbol index within one subframe, Representing an identification ID corresponding to the single-frequency network of the multimedia broadcast multicast service;
  • the initialization value of the scrambling code sequence used by the user equipment specific reference signal generation is The H represents any real number that is independent of the first cell time information, An identification ID of a cell indicating data transmission, the n RNTI indicating a radio network temporary identification RNTI corresponding to the PDSCH;
  • an initial value of the scrambling code sequence used by the CSI-RS generation is The J represents any real number that is independent of the first cell time information, Indicates the identification ID of the channel state information CSI.
  • the performing data transmission with the first cell according to the determined data sending moment includes:
  • the determining, according to the preset rule, the time information of the first cell includes:
  • the time information of the second cell includes at least one of the following: a slot index, a subframe index, a radio frame index, and a radio superframe index.
  • the determining, according to the time information of the second cell and the data sending time, determining a time corresponding to the data sending moment Information including:
  • the time information corresponding to the time at which the data transmission time is specified by the data transmission time on the second cell is determined as the time information corresponding to the data transmission time.
  • the specified time interval includes at least one of: M OFDM symbols, N time slots, where M, N Is an integer not less than zero.
  • the determining, according to the time information of the second cell and the data sending time, determining a time corresponding to the data sending time Information including:
  • the time information closest to the data transmission time on the second cell is determined as time information corresponding to the data transmission time.
  • the time information of the first cell is located in a predefined time information range
  • the predefined time information is time information corresponding to each time unit included in the first cell data transmission start time to the data transmission end time, and the time unit includes at least one of the following: one time slot, one child a frame, a radio frame, and a radio superframe; the time information corresponding to the time unit includes at least one of the following: a slot index, a subframe index, a radio frame index, and a radio superframe index.
  • the time information corresponding to the time unit of the start time is P, and other time after the time unit
  • the time information corresponding to the unit is sequentially numbered starting from P, where the P is an integer not less than zero.
  • the time information corresponding to each time unit is the same.
  • the determining the time information of the first cell according to the preset rule includes:
  • the time information of the first cell is the first cell data transmission unit
  • the data transmission unit includes at least one of the following: one time slot, one subframe, one radio frame, and one wireless super frame; and the time information corresponding to the data transmission unit includes at least one of the following: a time slot Index, subframe index, radio frame index, wireless superframe index.
  • the time information of the first cell is used for at least one of the following: data Scrambling code, HARQ timing.
  • the first cell is a cell on an unlicensed spectrum.
  • a second aspect of the embodiments of the present invention provides a data transmission method, including:
  • Data transmission is performed with the user equipment according to the determined data transmission time.
  • the data for performing data transmission does not include time information of the local cell.
  • the data for performing data transmission does not include time information of the local cell at a specific moment, where the specific moment includes At any time between the M time and the N time, the M time represents the data transmission start time of the local cell, and the N time represents the data transmission of the time information of the local cell carrying the local cell. The beginning time.
  • the data for performing data transmission is generated from data bit to be experienced by the antenna
  • At least one operation in the process does not include time information of the current cell
  • the process of the experience includes at least one of the following operations: scrambling code, modulation mapping, layer mapping, precoding, resource element mapping, OFDM signal generation, and change Precoding, SC-FDMA signal generation, antenna port mapping.
  • the initialization value of the scrambling code sequence used by the data transmission data does not include time information.
  • the determining manner of the initial value of the scrambling code sequence used by the data transmission data includes:
  • the initial value of the scrambling code sequence used by the data carried by the PDSCH is The A represents any real number that is independent of the first cell time information, the n RNTI represents a radio network temporary identification RNTI corresponding to the PDSCH, and the q represents an arbitrary value related to the number of codewords, An identification ID of a cell indicating data transmission;
  • the initial value of the scrambling code sequence used by the data carried by the PMCH is The I represents any real number that is independent of the first cell time information, Representing an identification ID corresponding to the MBSFN of the multimedia broadcast multicast service single frequency network;
  • the initial value of the scrambling code sequence used by the data carried by the PCFICH is The B represents any real number that is independent of the first cell time information, An identification ID of a cell indicating data transmission;
  • the initial value of the scrambling code sequence used by the data carried by the PDCCH is The C represents any real number that is independent of the first cell time information, An identification ID of a cell indicating data transmission;
  • the initial value of the scrambling code sequence used by the data carried by the EPDCCH is The D represents any real number that is independent of the first cell time information, Indicates an ID of an EPDCCH, where m represents an EPDCCH set label;
  • the initial value of the scrambling code sequence used by the data carried by the PHICH is The E represents any real number that is independent of the first cell time information, An identification ID of a cell indicating data transmission;
  • the initial value of the scrambling code sequence used by the CRS or the PRS generation is The F represents any real number that is independent of the first cell time information, and the l represents an OFDM symbol index in one subframe, and the value of the N CP is related to a CP type, and the CP type includes a normal CP and Extended CP, said An identification ID of a cell indicating data transmission;
  • the initialization value of the scrambling code sequence used by the MBSFN RS generation is The G represents any real number that is independent of the first cell time information, and the l represents an OFDM symbol index within one subframe, Representing an identification ID corresponding to the single-frequency network of the multimedia broadcast multicast service;
  • the initialization value of the scrambling code sequence used by the user equipment specific reference signal generation is The H represents any real number that is independent of the first cell time information, An identification ID of a cell indicating data transmission, the n RNTI indicating a radio network temporary identification RNTI corresponding to the PDSCH;
  • an initial value of the scrambling code sequence used by the CSI-RS generation is The J represents any real number that is independent of the first cell time information, Indicates the identification ID of the channel state information CSI.
  • the performing data transmission with the user equipment according to the determined data sending moment includes:
  • the determining, according to the preset rule, the time information of the local cell including:
  • the time information of the second cell includes at least one of the following: a slot index, a subframe index, a radio frame index, and a radio superframe index.
  • the determining, according to the time information of the second cell and the data sending time, the time corresponding to the data sending time Information including:
  • the time information corresponding to the time at which the data transmission time is specified by the data transmission time on the second cell is determined as the time information corresponding to the data transmission time.
  • the specified time interval includes at least one of: M OFDM symbols, N time slots, where M, N Is an integer not less than zero.
  • the determining, according to the time information of the second cell and the data sending time, determining a time corresponding to the data sending moment Information including:
  • the time information closest to the data transmission time on the second cell is determined as time information corresponding to the data transmission time.
  • the time information of the local cell is located in a predefined time information range
  • the predefined time information is time information corresponding to each time unit included in the start of the data transmission start time to the data transmission end time, and the time unit includes at least one of the following: one time slot, one subframe, one a radio frame, a radio superframe; the time information corresponding to the time unit includes at least one of the following: a slot index, a subframe index, a radio frame index, and a radio superframe index.
  • the time information corresponding to the time unit of the start time is P, and other time after the time unit
  • the time information corresponding to the unit is sequentially numbered starting from P, where the P is an integer not less than zero.
  • the P 0.
  • the time information corresponding to each time unit is the same.
  • the determining, according to the preset rule, the time information of the local cell including:
  • time information of the current cell is determined.
  • the time information of the local cell is time information corresponding to the data transmission unit of the cell
  • the data transmission unit includes at least one of the following: a time slot, a subframe, a radio frame, and a radio superframe; and the time information corresponding to the data transmission unit includes at least one of the following: a slot index, a subframe. Index, radio frame index, wireless superframe index.
  • the time information of the local cell is used for at least one of the following: data interference Code, HARQ timing.
  • the current cell is a cell on the unlicensed spectrum.
  • a third aspect of the embodiments of the present invention provides a user equipment, including:
  • a time determining module configured to determine a data sending moment of the first cell
  • a data transmission module configured to perform data transmission with the first cell according to the determined data sending moment.
  • the data for performing data transmission does not include time information of the first cell.
  • the data for performing data transmission does not include time information of the first cell at a specific moment, the specific moment
  • the data includes a data transmission start time of the first cell, where the M time indicates that the first cell carries the time information of the first cell.
  • the data transmission start time is not included in the second possible implementation manner.
  • the data for performing data transmission is generated from data bit to at least one of a process experienced by the antenna An operation does not include time information of the first cell, and the process of the experience includes at least one of the following operations: scrambling code, modulation mapping, layer mapping, precoding, resource element mapping, OFDM Signal generation, change precoding, SC-FDMA signal generation, antenna port mapping.
  • the initialization value of the scrambling code sequence used by the data transmission data does not include time information.
  • the determining manner of the initial value of the scrambling code sequence used by the data transmission data includes:
  • the initial value of the scrambling code sequence used by the data carried by the PDSCH is The A represents any real number that is independent of the first cell time information, the n RNTI represents a radio network temporary identification RNTI corresponding to the PDSCH, and the q represents an arbitrary value related to the number of codewords, An identification ID of a cell indicating data transmission;
  • the initial value of the scrambling code sequence used by the data carried by the PMCH is The I represents any real number that is independent of the first cell time information, Representing an identification ID corresponding to the MBSFN of the multimedia broadcast multicast service single frequency network;
  • the initial value of the scrambling code sequence used by the data carried by the PCFICH is The B represents any real number that is independent of the first cell time information, An identification ID of a cell indicating data transmission;
  • the initial value of the scrambling code sequence used by the data carried by the PDCCH is The C represents any real number that is independent of the first cell time information, An identification ID of a cell indicating data transmission;
  • the initial value of the scrambling code sequence used by the data carried by the EPDCCH is The D represents any real number that is independent of the first cell time information, Indicates an ID of an EPDCCH, where m represents an EPDCCH set label;
  • the initial value of the scrambling code sequence used by the data carried by the PHICH is The E represents any real number that is independent of the first cell time information, An identification ID of a cell indicating data transmission;
  • the initial value of the scrambling code sequence used by the CRS or the PRS generation is The F represents any real number that is independent of the first cell time information, and the l represents an OFDM symbol index in one subframe, and the value of the N CP is related to a CP type, and the CP type includes a normal CP and Extended CP, said An identification ID of a cell indicating data transmission;
  • the initialization value of the scrambling code sequence used by the MBSFN RS generation is The G represents any real number that is independent of the first cell time information, and the l represents an OFDM symbol index within one subframe, Representing an identification ID corresponding to the single-frequency network of the multimedia broadcast multicast service;
  • the initialization value of the scrambling code sequence used by the user equipment specific reference signal generation is The H represents any real number that is independent of the first cell time information, An identification ID of a cell indicating data transmission, the n RNTI indicating a radio network temporary identification RNTI corresponding to the PDSCH;
  • an initial value of the scrambling code sequence used by the CSI-RS generation is The J represents any real number that is independent of the first cell time information, Indicates the identification ID of the channel state information CSI.
  • the data transmission module includes:
  • An information determining unit configured to determine time information of the first cell according to a preset rule
  • a data transmission unit configured to perform data transmission with the first cell according to time information of the first cell.
  • the information determining unit includes:
  • a first subunit configured to determine time information corresponding to the data sending moment according to the time information of the second cell and the data sending time
  • a second subunit configured to determine time information of the first cell according to time information corresponding to the data sending time, where the second cell and the first cell are deployed on different spectrum resources;
  • the time information of the second cell includes at least one of the following: a slot index, a subframe index, and a wireless Frame index, wireless superframe index.
  • the first sub-unit is specifically configured to: specify a time from the second cell to the data sending time
  • the time information corresponding to the time of the interval is determined as the time information corresponding to the data transmission time.
  • the specified time interval includes at least one of: M OFDM symbols, N time slots, where M, N Is an integer not less than zero.
  • the first sub-unit is specifically configured to send the second cell to be closest to the data sending time
  • the time information is determined as time information corresponding to the data transmission time.
  • the time information of the first cell is located in a predefined time information range
  • the predefined time information is time information corresponding to each time unit included in the first cell data transmission start time to the data transmission end time, and the time unit includes at least one of the following: one time slot, one child a frame, a radio frame, and a radio superframe; the time information corresponding to the time unit includes at least one of the following: a slot index, a subframe index, a radio frame index, and a radio superframe index.
  • the time information corresponding to the time unit of the start time is P, and other time after the time unit
  • the time information corresponding to the unit is sequentially numbered starting from P, where the P is an integer not less than zero.
  • the P 0.
  • the time information corresponding to each time unit is the same.
  • the information determining unit includes:
  • a third subunit configured to detect a signal carrying time information of the first cell, and determine a sequence form of the signal
  • a fourth subunit configured to determine time information of the first cell according to the sequence form.
  • the time information of the first cell is the first cell data transmission unit
  • the data transmission unit includes at least one of the following: one time slot, one subframe, one radio frame, and one wireless super frame; and the time information corresponding to the data transmission unit includes at least one of the following: a time slot Index, subframe index, radio frame index, wireless superframe index.
  • the time information of the first cell is used for at least one of the following: data Scrambling code, HARQ timing.
  • the first cell is a cell on an unlicensed spectrum.
  • a fourth aspect of the embodiments of the present invention provides a data transmission method, including:
  • a time determination module configured to determine a data transmission time of the current cell
  • a data transmission module configured to perform data transmission with the user equipment according to the determined data sending moment.
  • the data for performing data transmission does not include time information of the local cell.
  • the data for performing data transmission does not include time information of the local cell at a specific moment, where the specific moment includes At any time between the M time and the N time, the M time represents the data transmission start time of the local cell, and the N time represents the data transmission of the time information of the local cell carrying the local cell. The beginning time.
  • the data for performing data transmission is generated from data bit to at least one of a process experienced by the antenna An operation does not include time information of the current cell, and the process of the experience includes at least one of the following operations: scrambling code, modulation mapping, layer mapping, precoding, resource element mapping, OFDM signal generation, change precoding, SC - FDMA signal generation, antenna port mapping.
  • the initialization value of the scrambling code sequence used by the data transmission data does not include time information.
  • the determining manner of the initial value of the scrambling code sequence used by the data transmission data includes:
  • the initial value of the scrambling code sequence used by the data carried by the PDSCH is The A represents any real number that is independent of the first cell time information, the n RNTI represents a radio network temporary identification RNTI corresponding to the PDSCH, and the q represents an arbitrary value related to the number of codewords, An identification ID of a cell indicating data transmission;
  • the initial value of the scrambling code sequence used by the data carried by the PMCH is The I represents any real number that is independent of the first cell time information, Representing an identification ID corresponding to the MBSFN of the multimedia broadcast multicast service single frequency network;
  • the initial value of the scrambling code sequence used by the data carried by the PCFICH is The B represents any real number that is independent of the first cell time information, An identification ID of a cell indicating data transmission;
  • the initial value of the scrambling code sequence used by the data carried by the PDCCH is The C represents any real number that is independent of the first cell time information, An identification ID of a cell indicating data transmission;
  • the initial value of the scrambling code sequence used by the data carried by the EPDCCH is The D represents any real number that is independent of the first cell time information, Indicates an ID of an EPDCCH, where m represents an EPDCCH set label;
  • the initial value of the scrambling code sequence used by the data carried by the PHICH is The E represents any real number that is independent of the first cell time information, An identification ID of a cell indicating data transmission;
  • the initial value of the scrambling code sequence used by the CRS or the PRS generation is The F represents any real number irrelevant to the first cell time information, and the l represents an OFDM symbol index in one subframe, and the value of the N CP is related to a CP type, and the CP type includes a normal CP and Extended CP, said An identification ID of a cell indicating data transmission;
  • the initialization value of the scrambling code sequence used by the MBSFN RS generation is The G represents any real number that is independent of the first cell time information, and the l represents an OFDM symbol index within one subframe, Representing an identification ID corresponding to the single-frequency network of the multimedia broadcast multicast service;
  • the initialization value of the scrambling code sequence used by the user equipment specific reference signal generation is The H represents any real number that is independent of the first cell time information, An identification ID of a cell indicating data transmission, the n RNTI indicating a radio network temporary identification RNTI corresponding to the PDSCH;
  • an initial value of the scrambling code sequence used by the CSI-RS generation is The J represents any real number that is independent of the first cell time information, Indicates the identification ID of the channel state information CSI.
  • the data transmission module includes:
  • An information determining unit configured to determine time information of the current cell according to a preset rule
  • a data transmission unit configured to perform data transmission with the user equipment according to the time information of the local cell.
  • the information determining unit includes:
  • a first subunit configured to determine time information corresponding to the data sending moment according to the time information of the second cell and the data sending time
  • a second subunit configured to determine time information of the local cell according to the time information corresponding to the data sending time, where the second cell and the local cell are deployed on different spectrum resources;
  • the time information of the second cell includes at least one of the following: a slot index, a subframe index, a radio frame index, and a radio superframe index.
  • the first sub-unit is specifically configured to:
  • the time information corresponding to the time of the time interval is determined as the time information corresponding to the data transmission time.
  • the specified time interval includes at least one of: M OFDM symbols, N time slots, where M, N Is an integer not less than zero.
  • the first sub-unit is specifically configured to send the second cell to be closest to the data sending time
  • the time information is determined as time information corresponding to the data transmission time.
  • the time information of the local cell is located in a predefined time information range
  • the predefined time information is time information corresponding to each time unit included in the start of the data transmission start time to the data transmission end time, and the time unit includes at least one of the following: one time slot, one subframe, one a radio frame, a radio superframe; the time information corresponding to the time unit includes at least one of the following: a slot index, a subframe index, a radio frame index, and a radio superframe index.
  • the time information corresponding to the time unit of the start time is P, and other time after the time unit
  • the time information corresponding to the unit is sequentially numbered starting from P, where the P is an integer not less than zero.
  • the P 0.
  • the time information corresponding to each time unit is the same.
  • the information determining unit includes:
  • a third subunit configured to detect a signal carrying time information of the local cell, and determine a sequence form of the signal
  • the fourth subunit is configured to determine time information of the local cell according to the sequence form.
  • the time information of the local cell is a data transmission unit corresponding to the cell Time information
  • the data transmission unit includes at least one of the following: a time slot, a subframe, a radio frame, and a wireless superframe
  • the time information corresponding to the data transmission unit includes at least one of the following: a slot index , subframe index, radio frame index, wireless superframe index.
  • the time information of the local cell is used for at least one of the following: data interference Code, HARQ timing.
  • the current cell is a cell on the unlicensed spectrum.
  • a fifth aspect of the embodiments of the present invention provides a system for data transmission, including the user equipment provided by the first aspect and the transmission device provided by the second aspect.
  • a sixth aspect of the embodiments of the present invention provides a computer storage medium storing a program, the program including some or all of the steps of a method for data transmission provided by the first aspect.
  • a seventh aspect of the embodiments of the present invention provides a computer storage medium, where the computer storage medium stores a program, and the program includes some or all of the steps of a method for data transmission provided by the second aspect.
  • An eighth aspect of the embodiments of the present invention provides a user equipment, including an antenna port, a memory, and a processor, wherein the memory stores a set of programs, and the processor is configured to call a program stored in the memory, to perform the following operations:
  • a ninth aspect of the embodiments of the present invention provides a transmission device, where the transmission device corresponds to a cell, where the transmission device includes an antenna port, a memory, and a processor, where the memory stores a set of programs, and the processor is used to call the memory.
  • a stored program that performs the following operations:
  • Data transmission is performed with the user equipment according to the determined data transmission time.
  • the embodiment of the present invention first determines the data transmission time of the first cell, and then performs data transmission with the first cell according to the determined data transmission time, for example, according to the data transmission time of the first cell in the licensed spectrum,
  • the data transmission between the spectrum and the first cell can determine the time information on the unlicensed spectrum, ensure normal data communication between the LTE devices, and have the advantages of high efficiency of use of spectrum resources and small resource overhead.
  • FIG. 1 is a schematic flowchart of a method for data transmission according to an embodiment of the present invention
  • FIG. 2 is a schematic flowchart of another method for data transmission according to an embodiment of the present invention.
  • FIG. 3 is a schematic flowchart of a method for determining time information according to an embodiment of the present invention.
  • FIG. 4 is a schematic flowchart diagram of another method for determining time information according to an embodiment of the present invention.
  • FIG. 5 is a schematic flowchart diagram of still another method for determining time information according to an embodiment of the present disclosure
  • FIG. 6 is a schematic flowchart diagram of still another method for data transmission according to an embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a user equipment according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic structural diagram of a data transmission module according to an embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of an information determining unit according to an embodiment of the present invention.
  • FIG. 10 is a schematic structural diagram of another information determining unit according to an embodiment of the present invention.
  • FIG. 11 is a schematic structural diagram of a transmission device according to an embodiment of the present invention.
  • FIG. 12 is a schematic structural diagram of a data transmission module according to an embodiment of the present invention.
  • FIG. 13 is a schematic structural diagram of still another information determining unit according to an embodiment of the present invention.
  • FIG. 14 is a schematic structural diagram of still another information determining unit according to an embodiment of the present invention.
  • 15 is a schematic structural diagram of a system for data transmission according to an embodiment of the present invention.
  • FIG. 16 is a schematic structural diagram of another user equipment according to an embodiment of the present disclosure.
  • FIG. 17 is a schematic structural diagram of another transmission device according to an embodiment of the present invention.
  • FIG. 18 is a schematic diagram of time information of an unlicensed spectrum according to an embodiment of the present invention.
  • FIG. 19 is a schematic diagram of time information alignment of a spectrum according to an embodiment of the present invention.
  • 20 is a schematic diagram of time information of another license-free spectrum according to an embodiment of the present invention.
  • 21 is a schematic diagram of a timing relationship between unlicensed spectrum data transmission and feedback ACK/NACK according to an embodiment of the present invention.
  • FIG. 22 is a schematic diagram of another timing relationship between unlicensed spectrum data transmission and feedback ACK/NACK according to an embodiment of the present invention.
  • FIG. 23 is a schematic diagram of still another timing relationship between unlicensed spectrum data transmission and feedback ACK/NACK according to an embodiment of the present invention.
  • FIG. 24 is a schematic diagram of a subframe index sequence number according to an embodiment of the present disclosure.
  • FIG. 25 is a schematic diagram of another seed frame index sequence number according to an embodiment of the present invention.
  • the spectrum is the basis of wireless communication. According to the latest international spectrum white paper published by the Federal Communications Commission (FCC), unlicensed or unlicensed spectrum resources are larger than authorized or licensed spectrum resources.
  • FCC Federal Communications Commission
  • WiFi Wireless Fidelity
  • WiFi has drawbacks in terms of mobility, security, Quality of Service (QoS), and simultaneous handling of multi-user scheduling. Therefore, the application of Long-term Evolution (LTE) equipment to the unlicensed spectrum can not only effectively utilize unlicensed spectrum resources, but also provide more efficient wireless access and meet the needs of the growing mobile broadband services. Therefore, in future mobile communication scenarios, LTE devices and WiFi devices will exist simultaneously on the unlicensed spectrum.
  • LTE Long-term Evolution
  • LTE equipment In order to enable LTE equipment to operate on the unlicensed spectrum, it can maintain the advantages of mobility, security, quality of service and simultaneous multi-user scheduling with respect to WiFi.
  • One method is through carrier aggregation (Carrier Aggregation, CA).
  • CA Carrier Aggregation
  • the licensed spectrum and the unlicensed spectrum are aggregated together, that is, the LTE device can use the licensed spectrum as the primary component carrier (PCC) or the primary cell (PC).
  • PCC primary component carrier
  • PC primary cell
  • the unlicensed spectrum is used as a secondary component carrier (SCC) or a secondary cell (SCell), so that the LTE device can inherit the traditional advantages of the LTE device for wireless communication through the licensed spectrum, for example, in mobility.
  • SCC secondary component carrier
  • SCell secondary cell
  • ETSI EN 301893 issued by the European Telecommunications Standards Institute (ETSI) for use in unlicensed spectrum Rules such as Listen Before Talk (LBT) and channel bandwidth occupation requirements are specified.
  • ETSI European Telecommunications Standards Institute
  • the wireless communication device needs to use the LBT rule when occupying the unlicensed spectrum communication, that is, the device first monitors whether the channel is idle or available before using the channel, and can use the unlicensed spectrum if the channel is available. Channel, but the time taken to occupy the channel is limited. After the time limit for occupying the channel reaches the maximum limit, the unlicensed spectrum must be released for a period of time, that is, the data transmission is stopped for a period of time on the unlicensed spectrum; the license-free spectrum must be monitored again before the next time the unlicensed spectrum resource is occupied. Whether spectrum resources are available.
  • the device may perform a Clear Channel Assessment (CCA) through energy detection to determine whether the unlicensed spectrum resource is free or available.
  • CCA Clear Channel Assessment
  • LTE devices can initiate interception at any time, which is also allowed by regulatory rules. That is, on the unlicensed spectrum, LTE devices determine unlicensed spectrum resources. The available moments are also always available, especially the LBT mechanism of the LBE is utilized by the LTE device.
  • the LTE device determines that the unlicensed spectrum resource is available (determining whether the license-free spectrum resource is available under the condition of regulatory constraints), the data can be sent. Therefore, the time at which the LTE device transmits data on the unlicensed spectrum is also always available.
  • the LTE device determines that the unlicensed spectrum resource is available, and may use an energy detection mode.
  • the LTE device may determine The unlicensed spectrum resource is available; on the other hand, the LTE device determines that the unlicensed spectrum resource is available, and may also perform signal parsing, for example, by detecting whether a signal indicating that the unlicensed spectrum resource is occupied, or detecting a network allocation vector ( Network allocation vector, NAV).
  • NAV indicates that the device occupying the unlicensed spectrum occupies the time of the license-free spectrum.
  • the UE needs to know the radio frame index and the sub-data transmission between the base station device and the UE.
  • Frame index, slot index, symbol index, etc. for convenience of description, in the present text, these indexes are collectively referred to as time information.
  • the UE can determine the subframe index, the symbol index, and the slot index by receiving the primary synchronization signal (PSS) and the secondary synchronization signal (SSS) sent by the base station device.
  • PSS primary synchronization signal
  • SSS secondary synchronization signal
  • Receiving a physical broadcast channel (PBCH) sent by the base station device, determining a radio frame index, and acquiring the indexes by the UE may assist the UE to implement normal data communication with the base station device.
  • the UE may be used to recover the reference signal, so that the UE performs data demodulation, channel estimation, channel state information (CSI) measurement, radio resource management (RRM) measurement, etc.
  • the recovery reference signal may include Recovering the reference signal sequence may further include obtaining a time position of the reference signal transmission and a frequency domain position, where the time position may be determined in units of subframes, and the frequency domain
  • the location refers to the location of the frequency domain resource occupied by the reference signal in the frequency domain, and can be represented, for example, by the location or index of a resource element (RE).
  • RE resource element
  • the reference signal may include reference signals supported in an existing LTE system, such as a cell-specific reference signal (CRS), and a UE-specific reference for physical downlink shared channel (PDSCH) data demodulation.
  • a reference signal (UE-specific Reference Signal), a Demodulation Reference Signal (DM-RS) for enhancing an Physical Downlink Control Channel (EPDCCH) demodulation, and a Positioning Reference Signal (Positioning Reference Signal) , PRS), Channel State Information Reference Signal (CSI-RS), Discovery Reference Signal (DRS), etc.
  • UE acquires various indexes, which can facilitate the UE to determine a hybrid automatic repeat request (Hybrid)
  • the automatic repeat request (HARQ) sequence determines the time position of the data to be periodically transmitted.
  • HARQ automatic repeat request
  • the data to be periodically transmitted may include the information carried by the physical uplink control channel (PUCCH) periodically transmitted, and the sounding reference signal (Sounding reference si) Gnal, SRS), etc.; the UE obtains various indexes, and may also facilitate the UE to receive data sent by the base station device, such as data carried by the PDSCH, data carried by a Physical Multicast Channel (PMCH), and a physical control format indication channel ( The data carried by the Physical Control Format Indicator Channel (PCFICH), the data carried by the Physical Downlink Control Channel (PDCCH), the data carried by the EPDCCH, and the Physical Hybrid ARQ Indicator Channel (PHICH) bearer.
  • PUCCH physical uplink control channel
  • Sounding reference si Sounding reference signal
  • Gnal Sounding reference signal
  • SRS Sounding reference signal
  • the UE obtains various indexes, and can also facilitate the UE to send uplink data, so that the base station device can receive, for example, data carried by a physical uplink shared channel (PUSCH), and a physical uplink control channel (Physical Uplink Control Channel). , PUCCH) data carried, physical random access channel (Physical Random Access Channel, PRACH) data.
  • PUSCH physical uplink shared channel
  • PUCCH Physical Uplink Control Channel
  • PRACH Physical Random Access Channel
  • the signal PSS/SSS/PBCH which can make the UE know the time information of the data transmission between the base station device and the UE, is periodically transmitted, but for the unlicensed spectrum, whether the data can be transmitted is based on the unlicensed spectrum.
  • the resources can be used to determine, that is, the use of the unlicensed spectrum is opportunistic, so that the transmission of periodic signals under the LTE system cannot be guaranteed, especially the transmission of PSS/SSS/PBCH. Therefore, after the LTE device preempts the unlicensed spectrum and randomly transmits data, how to determine the time information of data transmission between the base station device and the UE, thereby ensuring the basis
  • the normal data communication between the station device and the UE is a technical problem to be solved by the embodiment of the present invention.
  • the embodiments of the present invention are applied to various types of wireless communication systems, and are particularly applicable to an Lens-Assisted Access (LAA) LTE system, that is, a LAA-LTE system.
  • LAA Lens-Assisted Access
  • the LTE system that permits spectrum-assisted access refers to an LTE system that uses licensed spectrum and unlicensed spectrum together by CA or non-CA.
  • Other deployment scenarios include a scenario where there is no ideal backhaul path between two serving cells (the primary serving cell and the secondary serving cell), such as a backhaul delay. Large, resulting in inability to quickly coordinate information between the two serving cells.
  • an independently deployed serving cell operating on the unlicensed spectrum that is, the serving cell operating on the unlicensed spectrum at this time can directly provide an independent access function without the assistance of the cell working on the licensed spectrum.
  • the device in the LTE system in the embodiment of the present invention includes a user equipment and a transmission device.
  • the user equipment (User Equipment, UE) may be referred to as a terminal (Mobile), a mobile station (Mobile Station, MS), or a mobile terminal (Mobile Terminal), etc., and the user equipment may be through a radio access network (Radio Access Network, Referred to as "RAN” for example, it communicates with one or more core networks.
  • the user equipment may be a mobile phone (or "cellular" phone) or a computer with a mobile terminal, etc., for example, the user device may also be portable.
  • the base station device may be a base station (NodeB, abbreviated as "NB") in WCDMA, and particularly refers to an evolved base station (Evolutional Node B, referred to as "eNB") in LTE.
  • the transmission device corresponds to the cell, and the cell may belong to the macro base station, or may belong to the base station device of the small cell, where the small cell may include: a metro cell, a micro cell, and a pico cell. (Pico cell), femto cell, etc.
  • small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.
  • the carrier in the LTE system is equivalent to the concept of a cell, for example, the UE accessing one carrier and accessing one cell are equivalent, and the embodiment of the present invention will be uniformly introduced by the concept of a cell.
  • FIG. 1 is a schematic flow chart of a method for data transmission in an embodiment of the present invention, where the method is implemented The example is implemented on a user device.
  • the flow of the method for data transmission in this embodiment as shown in the figure may include:
  • the first cell may be defined as a cell on the unlicensed spectrum.
  • the user equipment determines the data transmission time of the first cell, and the data transmission time of the first cell is not limited to the data transmission start time of the first cell, and the user equipment is scheduled by the data.
  • the data transmission time of the first cell may be from the moment when the first cell preempts to the unlicensed spectrum resource to the first time.
  • the cell is at any one of the times included in the end of the license-free spectrum data transmission.
  • the user equipment may determine the data sending time of the first cell by means of blind detection or buffering and re-detecting, and further, may determine the first The starting time at which the cell transmits data through the unlicensed spectrum.
  • the user equipment may also determine the data transmission time of the first cell by using other auxiliary information.
  • the specific detection method includes energy detection and/or signal detection.
  • the sending can assist the user equipment to determine that the unlicensed spectrum is preempted, and the signal can carry the autocorrelation property.
  • the sequence such as the Zadeoff-Chu (ZC) sequence, where the autocorrelation property is good, the ratio of the autocorrelation operation result and the cross-correlation operation result is greater than a certain threshold), so that the user equipment can utilize the local sequence pair.
  • the signal on the unlicensed spectrum is correlated, and the result of the correlation operation is used to determine whether the unlicensed spectrum resource is occupied.
  • the user equipment may consider that the first cell preempts the spectrum resource of the unlicensed spectrum, and may also detect the location corresponding to the threshold according to the correlation operation result (the correlation operation result is greater than a certain threshold corresponding to the detection)
  • the location means that, at the detection location, the user equipment uses the local sequence and the correlation operation result of the signal on the unlicensed spectrum to be greater than a certain threshold, and determines the data transmission time of the first cell on the unlicensed spectrum.
  • the user equipment may also determine a data sending moment of the first cell by detecting other signals and/or channels.
  • a channel format can be predefined, such as a predefined PDCCH format, or predetermined
  • the information carried by the PDCCH that is, the Downlink Control Information (DCI)
  • DCI Downlink Control Information
  • the user equipment may consider The first cell preempts the unlicensed spectrum resource, and the user equipment may also detect the time or time position corresponding to the predefined matching PDCCH format (or detecting the DCI that matches the predefined match) as the data sending time of the first cell. .
  • the first cell may also be preempted to the unlicensed spectrum.
  • the energy detection result may exceed a certain time or time position corresponding to a certain threshold as the first cell.
  • Data transmission time may include a DCI of a specific format, for example, may be DCI format 0, DCI format 1, DCI format 1A, DCI format 1B, DCI format 1C, DCI format 1D, DCI format 2, DCI.
  • DCI Format 2A, DCI format 2B, DCI format 2C, DCI format 2D, DCI format 3, DCI format 3A, DCI format 4, or the information contained in the DCI is a predefined or DCI carried on a specific time-frequency resource (ie The location of the time-frequency resource sent by the DCI is predefined in advance; the DCI of the specific format may be a DCI common to the cell, a UE-specific DCI, or a certain group of UE-specific DCI. Obviously, in this case, the UE needs to know the predefined PDCCH format or the DCI format before detecting the first signal.
  • the user equipment may further determine whether the first cell has data scheduling to the unlicensed spectrum by blindly detecting the PDCCH, and if it is determined by blind detection that the first cell has data scheduling on the unlicensed spectrum, the user equipment The time or time position corresponding to the detected data scheduling information may be used as the data transmission time of the first cell, where the PDCCH may be transmitted on the unlicensed spectrum or may be transmitted on the licensed spectrum. Further optionally, the user equipment may also determine whether the first cell has data scheduling to the unlicensed spectrum by blindly detecting other control channels.
  • the user equipment may first cache data on the unlicensed spectrum for a certain period of time, where the certain time may include an integer number of Orthogonal Frequency Division Multiplexing (OFDM) symbols, an integer number of time slots, and an integer.
  • the control channel here may be a PDCCH, based on other auxiliary indication information, such as control channel indication information from the unlicensed spectrum and/or licensed spectrum, determining the data transmission time of the first cell.
  • the user equipment can determine the data transmission duration of the first cell in the license-free spectrum, And determining, by the user equipment, a data transmission start time of the first cell, the user equipment may determine that the first cell is in the data transmission end time of the license-free spectrum, and correspondingly, the user equipment may determine all possible data transmission moments of the first cell; Alternatively, after determining that the first cell preempts the unlicensed spectrum resource or determines the data sending time of the first cell, the user equipment may consider that the first cell is in the data sending time until receiving the auxiliary information. When the auxiliary information indicates that the first cell ends the data transmission, the user equipment may determine the data transmission end time of the first cell.
  • the user equipment may also determine a data sending moment of the first cell by using other explicit signaling and/or other blind detection manners.
  • the user equipment receives data sent by the first cell according to the determined data transmission time, and/or sends data to the first cell.
  • the data for performing data transmission does not include time information of the first cell.
  • the time information of the first cell is time information corresponding to the data transmission unit of the first cell, and the data transmission unit includes at least one of the following: an OFDM (Orthogonal Frequency Division Multiplexing) symbol.
  • One time slot, one subframe, one radio frame, and one wireless superframe is included in the data transmission unit.
  • the time information corresponding to the data transmission unit includes at least one of the following: an OFDM symbol index, a slot index, a subframe index, a radio frame index, and a radio superframe index.
  • At least one of the PDSCH, the PDCCH, the PHICH, the PCFICH, the EPDCCH, the PUSCH, the PUCCH, and the PRACH mentioned in the foregoing related art does not include time information, where time information is not included, and the information carried by the channel may be performed.
  • the scrambling code sequence may not carry time information, or the information carried by the channel may not include time information when performing at least one of the following steps: coding, modulation, resource mapping, and determining a cyclic shift (Cyclic Shift) size. .
  • the time information is not included, and any one of the channels and/or signals included in the LTE system may not include time information from any step of generating to the experience of being sent by the antenna, or any one included in the LTE system. Any one of the steps of channel and/or signal generation from the generation to the baseband processing experienced by the antenna does not include time information.
  • the baseband processing steps from the generation of the PDSCH to the transmission by the antenna include, but are not limited to, scrambling, modulation, layer mapping, precoding, resource element mapping; taking the PDCCH as an example, the PDCCH is generated from the antenna to the experience of being sent by the antenna.
  • Baseband processing steps include, but are not limited to, determining PDCCH format, PDCCH multiplexing and scrambling, modulation, layer mapping, and pre- Coding, resource element mapping; taking CRS as an example, the steps from CSR to generation by the antenna include but are not limited to: sequence generation, resource element mapping.
  • a physical layer channel and/or signal processing procedure includes, for each codeword, the included data bits are scrambling, modulation mapper, layer Forming a baseband channel and/or a signal to be transmitted after mapping (Layer mapper), precoding (Recoding), resource element mapper, OFDM signal generation, and antenna ports;
  • a physical layer channel and/or signal processing procedure includes, for each codeword, the included data bits are scrambling, modulation mapper, layer mapper , Transform precoder, Precoding, Resource element mapper, Single Carrier-Frequency Division Multiplexing Access (SC-FDMA) signal generation After the antenna ports are mapped, the baseband channel and/or signal to be transmitted is formed. Therefore, the data for performing data transmission does not include time information of the first cell, and may further include:
  • At least one of the data transmission data generated from the data bit generation to the process emanating by the antenna does not include the time information of the first cell, and the process of the experience includes at least one of the following: scrambling code, modulation Mapping, layer mapping, precoding, resource element mapping, OFDM signal generation, change precoding, SC-FDMA signal generation, antenna port mapping.
  • the process of the experience may also include other steps as long as the data transmission data is included in the process of the embodiment of the present invention from the generation of the data bits to the steps involved in the process of being issued by the antenna.
  • the initialization value of the scrambling code sequence is defined as shown in the formula (1), where n RNTI represents the RNTI (Radio Network Temporary Identify) corresponding to the scheduled PDSCH transmission, and n s represents a wireless
  • the slot index within the frame Indicates an identification (ID) corresponding to a cell (Cell) that transmits a PDSCH.
  • the scrambling code sequence may not carry the time information, or the initialization of the scrambling code sequence may not carry the time information, and the data carried by the PDSCH is taken as an example, and the initialization value of the scrambling code sequence may not be included.
  • the value associated with the time information, such as n s is an optional implementation, and the sequence of initialization is as shown in equation (2).
  • the initialization value of the scrambling code sequence used by the data for data transmission does not include time information.
  • the initialization value of the scrambling code sequence used by the data for data transmission can be determined by:
  • the initial value of the scrambling code sequence used by the data carried by the PDSCH is Where A represents any real number independent of the first cell time information, q represents any value associated with the number of codewords, and further, A may be 1;
  • the initial value of the scrambling code sequence used by the data carried by the PMCH is The I represents any real number that is independent of the first cell time information, wherein An identification ID corresponding to a Multimedia Broadcast multicast service Single Frequency Network (MBSFN);
  • MMSFN Multimedia Broadcast multicast service Single Frequency Network
  • the initial value of the scrambling code sequence used by the data carried by the PCFICH is Where B represents any real number that is independent of the first cell time information, and further, B may be 0;
  • the initial value of the scrambling code sequence used by the data carried by the PDCCH is Wherein C represents any real number that is independent of the first cell time information, and further, C may be 1;
  • the initial value of the scrambling code sequence used by the data carried by the EPDCCH is
  • D represents any real number that is independent of the first cell time information, and further, D may be 1, Indicates an EPDCCH ID, and m denotes an EPDCCH set number (EPDCCH set number);
  • the initial value of the scrambling code sequence used by the data carried by the PHICH is
  • E represents any real number that is independent of the first cell time information, and further, E may be 0;
  • the initial value of the scrambling code sequence used by the CRS or PRS generation is
  • F denotes any real number that is independent of the first cell time information
  • l denotes an OFDM symbol index within one subframe
  • the value of N CP is related to the CP type
  • the CP type includes a normal CP and an extended CP.
  • F may be 0; further, l may also take other values unrelated to the OFDM symbol index. It should be noted that the above formula is only for the explanatory form. For the CRS and the PRS, although the formula forms may be the same, the F values may be different.
  • the initial value of the scrambling code sequence used by the MBSFN RS generation is
  • G represents any real number that is independent of the first cell time information, and other parameter values may refer to the above embodiment. Further, G can be zero. Further, l can also take other values that are independent of the OFDM symbol index.
  • the initialization value of the scrambling code sequence used by the UE-specific reference signal generation is
  • H represents any real number that is independent of the first cell time information, and other parameter values may refer to the above embodiment. Further, H can be zero.
  • the initial value of the scrambling code sequence used by the CSI-RS generation is
  • J represents any real number that is independent of the first cell time information, Indicates an identification ID corresponding to the channel state information CSI, Value can be equal to Or other values are configured by higher layer signaling. For other parameter values, reference may be made to the above embodiment. Further, J can be zero.
  • the initialized sequence may include time information of the first cell, for example, including n s , but n s is predefined, for example, the start position of the data transmission of the unlicensed spectrum is
  • the value of n s used for sequence initialization may be 0, or other predefined values, such as any integer value from 0-19, or other integer values, and the like.
  • the above method is also applicable to other data, such as data carried by the PMCH, data carried by the PDCCH, data carried by the PHICH, data carried by the PCFICH, data carried by the EPDCCH, data carried by the PUSCH, data carried by the PUCCH, data carried by the PRACH, etc.
  • other channels and/or signals including time information in at least one step of data encoding, modulation, resource mapping, and the like are included.
  • the data transmission data does not include the time information of the first cell, which has the beneficial effects of: in addition to ensuring normal data transmission between the first cell and the user equipment, it can also solve the opportunistic use of the unlicensed spectrum.
  • the effect of data advance group package on data transmission Taking the first cell side as an example, before the data is sent by the first cell, the data to be sent needs to be assembled in advance.
  • the data of the group package in advance may be for a single user or for a plurality of users scheduled.
  • the first cell transmits data in the subframe #n, and the subframe #n corresponds to the transmitted data, and the first cell is assembled in a subframe before the subframe #n, for example, the subframe #n-1, according to the current LTE protocol.
  • the specification includes the time information of the subframe #n in the data assembled by the subframe #n-1, for example, the scrambling code sequence initial value corresponding to the scrambling code sequence used in the PDSCH and the time slot included in the subframe #n, as described above.
  • the index for the unlicensed spectrum, if the first cell does not preempt the unlicensed spectrum resource at subframe #n or before, the first cell cannot perform data transmission in subframe #n of the unlicensed spectrum resource.
  • one method is to discard the above-mentioned data assembled in the subframe #n-1, and discard the original data corresponding to the assembled data.
  • the original data here may be bit information corresponding to the data, and the data carried by the PDSCH is taken as an example, and the corresponding original data may be bit information before the codeword is scrambled. This is because even if the first cell re-preempts the spectrum resource in the subsequent subframe of subframe #n, for example, subframe #n+1, the data assembled in subframe #n-1 cannot be transmitted again because in subframe #
  • the time information included in the n-1 assembled data is the time information corresponding to the subframe #n, and is not the time information corresponding to the subframe #n+1.
  • the existing data receiving process if the subframe #n is included, The data of the time information is directly sent in the subframe #n+1, and the user equipment cannot receive the packet correctly.
  • This packet loss operation will affect the user experience. Especially considering the opportunistic use of the license-free spectrum, the uncertainty of data transmission may be uncertain. Frequently, in this way, packet loss may occur frequently, seriously affecting the user experience; another method is to discard the above-mentioned data assembled in subframe #n-1, but not to discard the assembled The raw data corresponding to the data.
  • the subframe #n may continue to be assembled in the subframe #n-1.
  • the original data corresponding to the good data is reassembled, and the reassembled data can be carried in the subframe #n+1, so the time information corresponding to the subframe #n+1 can be carried.
  • This does not result in packet loss of the original data, but increases the complexity of the scheduling on the base station side, which is equivalent to performing multiple group packets for the same original data; and another method is that the device can determine the preemption to the unlicensed spectrum resource. Then, the data packet is started again.
  • the device determines to preempt the unlicensed spectrum resource in the subframe #n+1, and the device (which may be the base station or the user equipment, the base station may be the base station to which the first cell is dependent) starts to perform the packetization.
  • the device it takes time for the device to perform the data packet, for example, 1 subframe. Therefore, even if the device determines to preempt the unlicensed spectrum resource in the subframe #n, it goes to the subframe #n. +1 sends data, so the unlicensed spectrum resources corresponding to subframe #n cannot be effectively used, considering The licensed spectrum resources generally have a maximum data transmission time limit, so such an approach will reduce the data transmission efficiency of the unlicensed spectrum.
  • the data transmission time corresponding to the data of the advance group packet needs to be considered, but for the unlicensed spectrum resource, due to the randomization of the data transmission time, the packet data in advance is not caused. Preempting the unlicensed spectrum resources at the corresponding moments and discarding them, thereby affecting the user experience, or increasing the complexity of device data processing, or reducing the data transmission efficiency of the unlicensed spectrum.
  • the data transmission of the license-free spectrum is performed because the specific location of the preemption time is not considered in the early grouping process, or the time information is directly canceled in the grouping process, or the predefined value is used as the time information.
  • the packet data can be sent in advance, thereby ensuring the user experience and facilitating data processing of the device, especially In the data group package, it is not necessary to consider the influence of the opportunistic use of the unlicensed spectrum on the time information involved in the data processing, and after preempting the unlicensed spectrum resource, the data can be directly transmitted to ensure the data transmission efficiency of the license-free spectrum.
  • the data generation process may not include time information or adopt a predefined manner for the time information, and corresponds to a subframe or a time slot or an OFDM symbol carrying the data transmission.
  • the index may also be determined by the method used in any of the embodiments shown in FIG. 2 to FIG. 5 in the following description of the present invention, which is not limited herein.
  • the data for performing data transmission does not include time information of the first cell, and it may be understood that the data for performing data transmission does not include time information of the first cell at a specific moment.
  • the specific time includes any time from the M time to the N time, where the M time represents the data transmission start time of the first cell, and the N time represents the data transmission start of the time information that the first cell can carry the first cell. time.
  • the data sending start time of the first cell may correspond to the start time of the first cell preempting the unlicensed spectrum resource.
  • the data transmission time of the first cell is not limited to the data transmission start time of the first cell, and may be the time when the user equipment is scheduled by the data. Further, if the first cell is exempted In the embodiment of the present invention, the data transmission time of the first cell may be included from the moment when the first cell preempts to the unlicensed spectrum resource to the time when the first cell is in the end of the license-free spectrum data transmission. Any time, therefore, it can be understood that, in the embodiment of the present invention, according to the determined data sending time, the time position corresponding to the data transmission performed by the first cell is compared with the data sending time of the first cell.
  • the time from the time when the first cell preempts the unlicensed spectrum resource to the time when the first cell is in the end of the license-free spectrum data transmission may be, the time when the first cell preempts the unlicensed spectrum resource may correspond to the The data transmission start time of a cell. It can be understood that if the first cell preempts the unlicensed spectrum resource, the other party is determined by the other party (for example, by the method used in any one of the embodiments introduced in FIG. 2 to FIG. 5 in the following description of the present invention).
  • the time information of a cell after the preemption of the first cell to the unlicensed spectrum resource, the time information of the first cell may be considered in the data packet process, but since the data packet requires a certain time, during this period of time, The data of the time packet of the first cell is not yet ready, so during this period of time, the data packet can be performed by using the time information not including the first cell, thereby completing the data transmission.
  • the data transmission start time of the time information from the first cell may be corresponding to the time when the first cell may include the time information of the first cell.
  • the data for performing data transmission includes time information of the first cell.
  • the user equipment can always assume that the data for data transmission does not include the time information of the first cell, until the trigger signaling is received, and trigger the user equipment to determine the time information of the first cell according to the preset rule.
  • the trigger signaling may be from the unlicensed spectrum, or may be from the licensed spectrum, may be physical layer signaling, may be UE-specific physical layer signaling, or may be a physical layer signaling common to the cell, or may be a certain group.
  • the user equipment learns the specific time duration or the time range in which the specific time is located, and in this time range, it is assumed that the data for data transmission does not include the time information of the first cell. Outside of this time range, it is assumed that the data belonging to the data transmission includes the time information of the first cell; or, one way, the user equipment can know the data transmission time of the first cell, and the time period can be assumed to be performed.
  • the data transmitted by the data does not include the time information of the first cell, and the time ranges can be based on the preset rules. Then, determining time information of the first cell, and further assuming that the data for performing data transmission includes Time information of a cell.
  • the UE needs to advance or specific time information or information that can be determined at a specific time, and can be implemented by means of pre-definition, signaling, and UE blind detection.
  • the data grouping process may include an OFDM symbol index within one subframe, for the unlicensed spectrum.
  • the resource even if the preempted data transmission time has randomness, for example, the OFDM symbol position within one subframe of the data transmission start time is uncertain, and the data including the OFDM symbol index may be directly transmitted.
  • the data transmission start time may be used as the starting position of one subframe to determine an index corresponding to the OFDM symbol included in the subframe, that is, the data transmission start time is assumed to be within one subframe.
  • the OFDM symbol position actually corresponds to the OFDM symbol of index #5, and the user equipment can determine the OFDM symbol index as the starting position of one subframe as the starting position of the subframe, that is, the OFDM index is #0.
  • the base station first cell
  • all or part of the packet data is directly transmitted (partial transmission depends on if the slave is preempted)
  • the time interval between the arrival of the unlicensed spectrum resource and the arrival of the next subframe boundary is smaller than the length of time required for the packet data transmission, and the partial transmission is used, and the user equipment may correctly receive the packet data according to the above understanding of the OFDM symbol index. .
  • the data for data transmission may or may not include a Public Land Mobile Network Identity of the first cell.
  • the PLMN ID includes carrier information of the first cell slave. If the data for data transmission includes the PLMN ID of the first cell, interference randomization between data transmissions of different operators can be implemented, especially on the unlicensed spectrum, because there is no site deployment between different operators. Coordination and planning, sites deployed by different operators may be close to each other, which will cause large interference between different operators, including PLMN IDs in the data transmission, even sites deployed by different operators. The distance is very close, and the interference between data transmissions of different operators can also be randomized.
  • the existing data generation process can be multiplexed as much as possible for data generation, whether for the cell or the user equipment.
  • the implementation is relatively simple, and this implementation is more suitable for different operator sites. Far scenes, but not limited to this scene.
  • FIG. 2 is a schematic flowchart of another method for data transmission in an embodiment of the present invention.
  • the method embodiment is implemented in a user equipment, and may include:
  • the first cell may be defined as a cell on the unlicensed spectrum.
  • the user equipment determines the data transmission time of the first cell, and the data transmission time of the first cell is not limited to the data transmission start time of the first cell, and may be the data start time. Or the time being scheduled.
  • the user equipment may determine the starting time of the first cell to send data through the unlicensed spectrum by means of blind detection or buffering and re-detection.
  • the specific detection method includes energy detection and/or signal detection.
  • the time information of the first cell is time information corresponding to the first cell data transmission unit
  • the data transmission unit includes at least one of the following: one OFDM (Orthogonal Frequency Division Multiplexing) ) symbol, one time slot, one subframe, one radio frame, one wireless superframe.
  • the time information corresponding to the data transmission unit includes at least one of the following: an OFDM symbol index, a slot index, a subframe index, a radio frame index, and a radio superframe index.
  • the time information of the first cell is used for at least one of the following: data scrambling code, HARQ timing.
  • predetermined rules include at least three kinds, and the following detailed description will be respectively made in conjunction with FIG. 3, FIG. 4 and FIG.
  • S203 Perform data transmission with the first cell according to time information of the first cell.
  • the user equipment receives data sent by the first cell according to the determined data transmission time, and/or sends data to the first cell.
  • the embodiment of the present invention first determines the data transmission time of the first cell, and then performs data transmission with the first cell according to the determined data transmission time, for example, according to the data transmission time of the first cell in the licensed spectrum, the unlicensed spectrum and the first
  • the cell carries out data transmission and can determine the time letter on the unlicensed spectrum.
  • the information ensures normal data communication between LTE devices, and has the advantages of high efficiency of spectrum resources and small resource overhead.
  • FIG. 3 is a schematic flowchart of a method for determining time information according to an embodiment of the present invention.
  • the method is implemented in a user equipment, and is determined according to the preset rule in step S202 in FIG. Detailed explanation of the time information.
  • the flow of the method for determining time information in this embodiment as shown in the figure may include:
  • the second cell and the first cell may be defined to be deployed on different spectrum resources.
  • One mode of different spectrum resources is that the second cell and the first cell are deployed in different frequency bands, for example, the second cell is deployed in the licensed spectrum, the first cell is deployed in the unlicensed spectrum, and the other is different in the spectrum resource.
  • the second cell is deployed in the same frequency band as the first cell, for example, the first cell is deployed in the unlicensed spectrum, and the second cell is also deployed in the unlicensed spectrum, but the first cell and the second cell are deployed in the license-free mode.
  • the spectrum is comprised of different frequencies (or carriers).
  • the time information of the second cell includes at least one of the following: an OFDM symbol index, a slot index, a subframe index, a radio frame index, and a radio superframe index.
  • the user equipment determines time information that is closest to the data transmission time on the second cell as time information corresponding to the data transmission time.
  • the user equipment may use the determined data transmission time of the first cell as one subframe on the unlicensed spectrum of the first cell.
  • the start boundary and the user equipment determines the subframe index corresponding to the start time of the data transmission on the unlicensed spectrum according to the time information of the licensed spectrum, such as the subframe index of the licensed spectrum.
  • the time information of the licensed spectrum such as the subframe index of the licensed spectrum.
  • the subframe index corresponding to the start boundary is the subframe index corresponding to the subframe in which the start time of the data transmission on the unlicensed spectrum is located.
  • the above example is a case where the time information of the sub-frame of the unlicensed spectrum and the sub-frame of the licensed spectrum is not aligned.
  • the alignment concept described in the embodiment of the present invention may refer to absolute alignment, or may be referred to as an allowable time error.
  • Alignment within the range, for example, the maximum allowable time error can be 260 nanometers Second, that is to say, taking the transmitting end as an example, if there is a time error of 260 nanoseconds between the system frame number (SFN) boundary or the subframe boundary or the radio frame boundary between the unlicensed spectrum and the licensed spectrum, It can still be considered that the license-free spectrum and the licensed spectrum are aligned.
  • SFN system frame number
  • 260 nanoseconds is just an example.
  • FIG. 19(a) is an illustration of absolute alignment of time information of the unlicensed spectrum and the licensed spectrum
  • FIG. 19(b) is an unlicensed spectrum.
  • the time information lags behind the time information of the licensed spectrum as an example.
  • the boundary alignment concept is equally valid for the time information of the unlicensed spectrum ahead of the licensed spectrum.
  • an example of determining time information corresponding to a data transmission time is also effective for the case where only a part of the subframe boundary is not aligned with the licensed spectrum subframe boundary on the unlicensed spectrum, and specifically refer to another license-free operation shown in FIG.
  • a schematic diagram of the time information of the spectrum as shown in the figure, the other subframe boundaries except the first subframe boundary on the unlicensed spectrum are aligned with the boundaries of the licensed spectrum subframe.
  • the data transmission time of the determined unlicensed spectrum resource data transmission is simply referred to as the first time, for example, the first time may be the data transmission start time of the first cell, or may be the user.
  • the time at which the device is scheduled by the data may be the time information of the first cell determined from the time when the first cell preempts the unlicensed spectrum resource to the time that the first cell includes the end time of the license-free spectrum data transmission end time. It may be time information corresponding to a data transmission unit including the first time. The following takes the data transmission unit as a sub-frame as an example.
  • the advantage of determining the time information closest to the data transmission time on the second cell as the time information corresponding to the data transmission time is that sufficient time can be reserved for the HARQ timing processing on the unlicensed spectrum.
  • a user equipment that is capable of uplink single-carrier capability, or for a user equipment that does not support carrier aggregation in the uplink only one carrier can be used as an uplink carrier for data transmission.
  • the downlink can support carrier aggregation, for example, the unlicensed spectrum and the licensed spectrum are aggregated together, an uplink acknowledgement (ACK) and an uplink negative response (Negative) corresponding to the unlicensed spectrum downlink data transmission.
  • ACK uplink acknowledgement
  • Negative uplink negative response
  • NACK Acknowledgement, NACK can also only be sent on the licensed spectrum.
  • the propagation delay and processing delay of information interaction transmitting and receiving by signal and/or channel between the transmitting end and the receiving end are considered, and for Frequency Division Duplexing (FDD).
  • FDD Frequency Division Duplexing
  • TDD Time Division Duplexing
  • the downlink ACK/NACK feedback for the uplink data has the same timing relationship as the downlink, and will not be described again. It can be seen that for the current LTE system, the minimum time required from the detection or reception of the scheduling data to the feedback ACK/NACK is 4 ms. Therefore, in the embodiment of the present invention, when determining the subframe index of the unlicensed spectrum, the user equipment corresponds to the start boundary of the subframe on the licensed spectrum that is closest to the time after the data transmission time of the first cell. The subframe index is used as the subframe index corresponding to the subframe in which the first time is located, so that the minimum time required to detect or receive the scheduled data to the feedback ACK/NACK can be guaranteed, as shown in FIG. 21 below. FIG.
  • FIG. 21 is an example of an FDD system.
  • the same method may be used to determine a subframe index corresponding to a subframe in which the first time is located.
  • the difference is that the subframe labeled with the ACK or NACK in FIG. 21 is
  • the TDD system may be an uplink subframe that is available after the subframe n+5 (including the subframe n+5).
  • Figure 22 shows another implementation for the first time unit length greater than 1 subframe.
  • the first time unit is also labeled as subframe n+1, but it should be noted that the sub- The frame length is already greater than the 1 ms defined in the current LTE system.
  • the advantage of making the first time unit length greater than 1 subframe is that the first time described in FIG.
  • the user equipment determines time information corresponding to the time at which the data transmission time is specified by the time interval on the second cell as the time information corresponding to the data transmission time.
  • the specified time interval includes at least one of the following: M OFDM symbols, N time slots, L fractional OFDM symbols, and integer multiples of K Ts, where M, N, L, and K are not less than An integer of zero.
  • the specified time interval may be used to make the UE known in a predefined manner or in a signaling manner.
  • the specific notification method is not limited in the embodiment of the present invention.
  • the embodiment of the present invention may be further extended to: if the minimum time required from the detection or reception of the scheduling data to the feedback ACK/NACK can be less than 4 ms, the user equipment may also be the first The subframe index corresponding to the start boundary of the subframe on the licensed spectrum that is closest to the first moment is used as the subframe index corresponding to the subframe in which the first time is located, as shown in FIG. 23 . Similarly, the user equipment may also use the subframe index corresponding to the subframe start boundary on the licensed spectrum before the first moment and having the specific time interval from the first moment as the subframe index of the subframe in which the first moment is located.
  • S302 Determine time information of the first cell according to the time information corresponding to the data sending time, where the second cell and the first cell are deployed on different spectrum resources.
  • the second cell and the first cell are deployed on different spectrum resources, for example, the first cell is deployed on the unlicensed spectrum resource, and the second cell is deployed on the licensed spectrum resource.
  • the determined subframe index corresponding to the data transmission time (ie, the first subframe index of the unlicensed spectrum) is the same as one subframe index of the licensed spectrum.
  • the user equipment aligns the subframe index of the licensed spectrum with the first subframe index of the unlicensed spectrum, and establishes a correspondence between the aligned licensed spectrum and the subframe index between the unlicensed spectrum, so as to correspondingly determine the first cell subsequent The subframe index of the other subframes.
  • the embodiment of the present invention first determines the data transmission time of the first cell, and then determines the time information corresponding to the data transmission time according to the time information of the second cell and the data transmission time, and further determines the time information of the first cell, and then according to the first cell.
  • the time information is transmitted to the first cell, and the user equipment can determine the time information of the unlicensed spectrum.
  • the subframe index is used as an example. After the user equipment determines the subframe index of the unlicensed spectrum, the time of the subframe can be determined.
  • the time slot index corresponding to the slot, and after the user equipment determines the subframe boundary, the OFDM symbol index included in the subframe may also be determined, so that the user equipment can perform the unlicensed spectrum according to the time information on the unlicensed spectrum.
  • the first cell on the top performs normal data communication, such as restoring the reference signal, determining the scrambling code sequence in the data generation process, determining the HARQ timing, and the like. It should be noted that, in order to ensure that the subframe boundaries of the unlicensed spectrum and the licensed spectrum are aligned as much as possible, the first time unit of data communication between the first cell and the user equipment is as large as 1 subframe, except In addition to the HARQ timing, other time information for recovering the reference signal in the first time unit, determining the scrambling code sequence in the data generation process, or realizing the data scrambling code, such as the slot index and the OFDM symbol index, may be the same. Time information In other words, the index can also use different time information.
  • FIG. 4 is a schematic flowchart of another method for determining time information according to an embodiment of the present invention.
  • the method is implemented in a user equipment, and is determined according to the preset rule in step S202 in FIG. Detailed description of the time information.
  • the flow of the method for determining time information in this embodiment as shown in the figure may include:
  • the predefined time information includes time information corresponding to each time unit included in the first cell data transmission start time to the data transmission end time, and the time unit includes at least one of the following: one OFDM symbol, one a time slot, a subframe, a radio frame, and a radio superframe; the time information corresponding to the time unit includes at least one of the following: an OFDM index, a slot index, a subframe index, a radio frame index, and a radio superframe index.
  • S402. Determine time information of the first cell according to predefined time information.
  • the user equipment determines, according to the predefined time information, time information corresponding to each time unit of the first cell data transmission on the unlicensed spectrum.
  • the user equipment uses the start time of the data transmission of the unlicensed spectrum as the starting boundary of the radio frame according to the predefined time information, and the radio frame index corresponding to the radio frame can be predefined.
  • the user equipment is known, and the user equipment can be known by other notification methods. If the wireless frame index is not needed during the data communication with the user equipment, the user equipment may not know the information, but need to know the user equipment.
  • the communication criteria The time information corresponding to the time unit starting from the start time is P, and the time information corresponding to other time units after the time unit is sequentially numbered from P, wherein the P is an integer not less than zero, and the P may be 0.
  • the user equipment can use the unlicensed spectrum according to the predefined information.
  • the starting time of the resource data transmission is used as the starting boundary of a radio frame, that is, index information for other time units after the time unit including the start time of the unlicensed spectrum resource data transmission, for example, other subframe indexes may be used.
  • the form of sequential numbering is shown in Figures 24 and 25. It should be noted that, for FIG. 25, when data transmission of the unlicensed spectrum is considered The interval is limited.
  • a rate matching operation can be performed for the data communication of the last subframe. For example, on the unlicensed spectrum, after preempting the use of the unlicensed spectrum resource, the data transmission time is up to 10 ms. Then, for the last subframe in Figure 25 (that is, the subframe labeled as subframe 9 in the figure), only the subframe can be utilized. A portion of the subframe transmits data to meet the 10 ms transmission time requirement, and is not used for data transmission for portions other than 10 ms.
  • the data matching of the data needs to be considered to implement data communication between the user equipment and the first cell; or, for the subframe 9, the scheduling may be jointly performed with the previous subframe 8. That is to say, based on the subframe boundary of the second cell, if the data transmission start time of the first cell is not located at the subframe boundary of the second cell, if the unlicensed spectrum data transmission time is limited, the first cell The data end time may not be located at the subframe boundary of the second cell.
  • the time unit of the first data transmission may be made larger than 1 subframe, the time unit of the last data transmission may also be greater than 1 subframe.
  • the data transmission included in the time unit is different. The same subframe index can be used in the time position, and different subframe indexes can also be used.
  • the time information corresponding to each time unit included in the first cell data transmission start time to the data transmission end time may be the same, for example, the subframe index may be 0.
  • the OFDM symbol index in one subframe and the time slot in one subframe may be determined according to the relationship between the subframe and the OFDM symbol, and the relationship between the subframe and the slot. index.
  • the relationship between the subframe and the OFDM symbol is as shown in Table 1.
  • the relationship between the subframe and the slot is as shown in Table 2.
  • the relationship between the subframe and the radio frame is as shown in Table 3, where Table 1
  • the normal Cyclic Prefix (Normal CP) is taken as an example.
  • Extended cyclic prefix Extended CP
  • 12 subframes are included in one subframe, and the distribution of symbol index and symbol position in one subframe is similar to that in Table 1, and will not be described again.
  • the specific value of the slot index k in Table 2 depends on the subframe index of the subframe in which the slot is located, or may be the radio frame index of the radio frame in which the slot is located, in one radio frame.
  • the time slot k ranges from 0 to 19.
  • subframes in one radio frame in Table 3 can be indicated by the subframe index (0-9) in the radio frame and the radio frame index of the radio frame, and can also be used in a superframe.
  • the sub-frame index (0 to 10239) in the range is indicated, that is, for the sub-frame index.
  • the embodiment of the present invention first determines the data transmission time of the first cell, and then determines the time information of the first cell according to the predefined time information, and then performs data transmission with the first cell according to the time information of the first cell, so that the user equipment can obtain Time information of the unlicensed spectrum, thereby facilitating the user equipment to recover the reference signal and realizing normal data communication with the first cell.
  • the user equipment can determine, according to the time information of the unlicensed spectrum and the time information of the licensed spectrum, that the uplink ACK or NACK fed back to the downlink data should be fed back in the subframe of the licensed spectrum, that is, The user equipment may first determine, according to the time information of the unlicensed spectrum and the time information of the licensed spectrum, a subframe of the licensed spectrum corresponding to the subframe of the unlicensed spectrum, as described in the first embodiment, To ensure the processing time of the HARQ, when determining the HARQ timing of the unlicensed spectrum, the subframe on the licensed spectrum closest to the start boundary after the start boundary of the unlicensed spectrum subframe may be used as the subframe corresponding to the unlicensed spectrum. Subframes, thereby facilitating the UE to determine the feedback position of the uplink ACK/NACK, as shown in FIGS. 24 and 25.
  • FIG. 5 is a schematic flowchart of a method for determining time information according to an embodiment of the present invention.
  • the method is implemented in a user equipment, and is determined according to the preset rule in step S202 in FIG. Detailed description of the time information.
  • the flow of the method for determining time information in this embodiment as shown in the figure may include:
  • the user equipment determines, by using the detection, the start time of the data transmission of the unlicensed spectrum resource, or determines that the first cell preempts the use opportunity of the unlicensed spectrum resource, and then determines the signal by detecting the time information of the first cell.
  • the signal includes a sequence form.
  • sequence may represent time information corresponding to a time unit including the sequence, such as a subframe index, a slot index, and the like.
  • S502. Determine time information of the first cell according to the sequence form.
  • the user equipment can determine the time information corresponding to the time unit including the sequence, and determine the time information corresponding to the first cell, or directly determine the time information corresponding to the first cell, for example, by blindly detecting different forms of the sequence.
  • the PSS in the existing LTE system is used as the signal carrying the time information, and the Zadoff-Chu sequence constituting the PSS has four different sequence forms (the LTE system adopts three of them), so the Zadoff-Chu sequence can be used to indicate at most Four different time information, for example representing four different subframe indices, or four different slot indices, or four different OFDM symbol indices.
  • the sequence constituting the SSS has 168 different sequence forms, so that 14 different sequence forms of the sequence constituting the SSS can be used to represent 14 different time information, for example, 14 different types. OFDM symbol index.
  • different sequence forms to carry different time information different time resources and/or frequency domain resource combinations occupied by the sequence may be used to represent different sequence forms, which are not limited in the embodiment of the present invention.
  • the user equipment performs blind detection on the sequence of bearer time information, and determines the time information of the license-free spectrum through the determined sequence form. For the time information after the start time, the user equipment can obtain the time information after the start time in the form of sequential numbering, and can also obtain the time information after the start time by other means. Based on the determined time information of the unlicensed spectrum, normal data communication with the first cell on the unlicensed spectrum can be maintained.
  • the foregoing embodiments may be used singly or in combination, which is not limited herein.
  • the method of the embodiment corresponding to FIG. 1 may be utilized, and in determining the HARQ timing of the first cell, the methods of other embodiments may be utilized.
  • the embodiment of the present invention first determines the time information of the first cell according to the sequence form, and performs data transmission with the first cell according to the determined time information of the first cell, so as to ensure normal data communication between the LTE devices, and has spectrum resources.
  • the advantages of high efficiency and low resource overhead are provided.
  • the scenario in which the user equipment uplinks data is slightly different from the embodiment described in FIG. 1 to FIG. Because the user equipment does not include the time information of the first cell in the process of transmitting data in the uplink, the user equipment may not first determine the data sending time of the first cell, that is, perform data transmission without scheduling by the first cell. Instead, the data is sent directly after the channel is seized.
  • the user equipment performs the following steps: determining a local data transmission time; and performing data transmission with the first cell according to the determined data transmission time.
  • FIG. 6 is a schematic flowchart diagram of still another method for data transmission according to an embodiment of the present invention.
  • the method embodiment is implemented in a transmission device.
  • the flow of the method for data transmission in this embodiment as shown in the figure may include:
  • the method for determining the data transmission time of the transmission device is the same as that of the user equipment side, and details are not described herein again. It should be noted that, slightly different from the method on the user equipment side, after the transmission device determines the time information of the license-free spectrum, the transmission data may be processed by using the determined time information, where the transmission data includes at least one of the following items. : The transmitted reference signal, the transmitted control data, and the transmitted service data.
  • S602. Perform data transmission with the user equipment according to the determined data transmission time.
  • the method for transmitting data by the transmission device to the user equipment according to the determined data transmission time is the same as the user equipment described in FIG. 1 to FIG. 4, and details are not described herein again.
  • the transmission device may determine the data transmission time of the local cell according to any moment included between the start time of preempting the unlicensed spectrum resource and the time of releasing the unlicensed spectrum resource.
  • the method for transmitting, by the transmission device, the data transmission with the user equipment according to the determined data transmission moment corresponds to the user equipment described in FIG. 5, and the specific interaction process is: the transmission device determines the data transmission of the license-free spectrum resource. After the start time, determining the time information and the corresponding time information after the time, determining a sequence form that can be used to represent the transmission time, and transmitting the signal by using the sequence form, and the user equipment blindly detects the signal carrying the time information. And obtaining the sequence form, and determining time information of the license-free spectrum according to the sequence form.
  • the manner of pre-defining or notifying enables the enhanced user equipment to obtain the criterion for determining the time information of the license-free spectrum; or simultaneously determining the time information of the license-free spectrum according to the capabilities of the enhanced user equipment and the non-enhanced user equipment, obviously, In the latter manner, for a cell, if two types of user equipments are scheduled in the same subframe, in this subframe, different subframe index numbers exist for different user equipments, in order to guarantee the cell and Normal data communication between these two types of user equipment can be used for both types of The user equipment adopts a specific (UE-specific) data transmission method, for example, CSI-RS or DMRS can be used for data demodulation, channel measurement, etc., and resources of the two types of user equipments can be frequency-division multiplexed.
  • CSI-RS or DMRS can be used for data demodulation, channel measurement, etc.
  • the different types of user equipments may also be scheduled in different subframes, for example, the non-enhanced user equipment is scheduled in the first type of subframe, and the time information of the unlicensed spectrum is determined according to the capabilities of the non-enhanced user equipment. , the enhanced user equipment is scheduled in the second type of subframe, and the time information of the license-free spectrum is based on this category. The ability to enhance the user equipment type is determined.
  • the user equipment when the user equipment accesses the serving cell or accesses the primary serving cell that is aggregated with the CA by using the CA, the user equipment can report the capability, so that the cell working on the unlicensed spectrum can learn to perform data with different types of user equipments. How to determine the time information on the unlicensed spectrum when communicating.
  • FIG. 7 is a schematic structural diagram of a user equipment according to an embodiment of the present invention.
  • the user equipment in the embodiment of the present invention may include at least a time determination module 710 and a data transmission module 720, where:
  • the time determination module 710 is configured to determine a data transmission time of the first cell.
  • the first cell may be defined as a cell on the unlicensed spectrum.
  • the time determination module 710 determines the data transmission time of the first cell, and it should be noted that the data transmission time of the first cell is not limited to the data transmission start time of the first cell, and may be a data start. Time, or the time being scheduled.
  • the time determining module 710 can determine the starting time of the first cell to send data through the unlicensed spectrum by means of blind detection or first buffering and re-detecting.
  • the specific detection method includes energy detection and/or signal detection.
  • the data transmission module 720 is configured to perform data transmission with the first cell according to the determined data transmission time.
  • the time information of the first cell is time information corresponding to the first cell data transmission unit
  • the data transmission unit includes at least one of the following: one OFDM (Orthogonal Frequency Division Multiplexing) ) symbol, one time slot, one subframe, one radio frame, one wireless superframe.
  • the time information corresponding to the data transmission unit includes at least one of the following: an OFDM symbol index, a slot index, a subframe index, a radio frame index, and a radio superframe index.
  • the data transmission module 720 may further include an information determining unit 721 and a data transmission unit 722 as shown in FIG. 8, wherein:
  • the information determining unit 721 is configured to determine time information of the first cell according to a preset rule.
  • the information determining unit 721 may further include a first subunit 721a and a second subunit 721b as shown in FIG. 9, wherein:
  • the first subunit 721a is configured to determine time information corresponding to the data sending moment according to the time information of the second cell and the data sending time.
  • the first sub-unit 721a may be specifically configured to determine time information corresponding to a time at which the data transmission time is specified by the data transmission time on the second cell as time information corresponding to the data transmission time.
  • the specified time interval includes at least one of the following: M OFDM symbols, N time slots, where M, N are integers not less than zero.
  • the first sub-unit 721a may be further configured to determine time information that is closest to the data transmission time on the second cell as time information corresponding to the data transmission time.
  • the second sub-unit 721b is configured to determine time information of the first cell according to the time information corresponding to the data sending time, where the second cell and the first cell are deployed on different spectrum resources.
  • the time information of the first cell is located in a predefined time information range, where the predefined time information is a start time of the first cell data transmission start time to a data transmission end time
  • the time information corresponding to each time unit included, the time unit includes at least one of the following: one OFDM symbol, one time slot, one subframe, one radio frame, one wireless superframe; the time information corresponding to the time unit includes At least one of the following: an OFDM index, a slot index, a subframe index, a radio frame index, and a radio superframe index.
  • time information corresponding to the time unit at which the start time starts is P, and the time information corresponding to other time units after the time unit is sequentially numbered starting from P, wherein the P is an integer not less than zero.
  • the P may be 0.
  • time information corresponding to each time unit is the same.
  • the information determining unit 721 may further include a third subunit 721c and a fourth subunit 721d as shown in FIG. 10, where:
  • the third subunit 721c is configured to detect a signal carrying time information of the first cell, and determine a sequence form of the signal.
  • the fourth subunit 721d is configured to determine time information of the first cell according to the sequence form.
  • the data transmission unit 722 is configured to perform data transmission with the first cell according to time information of the first cell.
  • the data for performing data transmission does not include time information of the local cell.
  • the data for data transmission does not include the public land mobile network identifier of the current cell.
  • the time information of the first cell is used for at least one of the following: data scrambling code, HARQ timing.
  • FIG. 11 is a schematic structural diagram of a transmission device according to an embodiment of the present invention.
  • the transmission device in the embodiment of the present invention may include at least a time determination module 810 and a data transmission module 820, where:
  • the time determination module 810 is configured to determine a data transmission time of the current cell.
  • the cell may be defined as a cell on the unlicensed spectrum.
  • the time determination module 810 determines the data transmission time of the current cell, and it should be noted that the data transmission time of the current cell is not limited to the data transmission start time of the current cell, and may be the data start time, or It is the time of being scheduled.
  • the time determining module 810 can determine the starting time of the data transmission by the cell through the license-free spectrum by means of blind detection or buffering and re-detection.
  • the specific detection method includes energy detection and/or signal detection.
  • the data transmission module 820 is configured to perform data transmission with the local cell according to the determined data transmission time.
  • the data transmission module 820 may further include an information determining unit 821 and a data transmission unit 822 as shown in FIG. 12, where:
  • the information determining unit 821 is configured to determine time information of the local cell according to a preset rule.
  • the time information of the current cell is time information corresponding to the data transmission unit of the cell
  • the data transmission unit includes at least one of the following: an OFDM (Orthogonal Frequency Division Multiplexing) symbol. , one time slot, one subframe, one radio frame, one wireless superframe.
  • the time information corresponding to the data transmission unit includes at least one of the following: an OFDM symbol index, a slot index, a subframe index, a radio frame index, and a radio superframe index.
  • the data transmission module 820 may further include an information determining unit 821 and a data transmission unit 822 as shown in FIG. 12, where:
  • the information determining unit 821 is configured to determine time information of the local cell according to a preset rule.
  • the information determining unit 821 may further include a first subunit 821a and a second subunit 821b as shown in FIG. 13, wherein:
  • a first subunit 821a configured to use time information of the second cell and the data sending moment, Determining time information corresponding to the data transmission time.
  • the first sub-unit 821a is specifically configured to determine time information corresponding to a time at which the data transmission time is specified by the data transmission time on the second cell as time information corresponding to the data transmission time.
  • the specified time interval includes at least one of the following: M OFDM symbols, N time slots, where M, N are integers not less than zero.
  • the first sub-unit 721a may be further configured to determine time information that is closest to the data transmission time on the second cell as time information corresponding to the data transmission time.
  • the second sub-unit 821b is configured to determine time information of the local cell according to the time information corresponding to the data sending time, where the second cell and the local cell are deployed on different spectrum resources.
  • the time information of the local cell is located in a predefined time information range, where the predefined time information is included in the start of the data transmission start time of the local cell and the end time of the data transmission.
  • the time information corresponding to each time unit includes at least one of: one OFDM symbol, one time slot, one subframe, one radio frame, and one wireless superframe; the time information corresponding to the time unit includes at least the following One: OFDM index, slot index, subframe index, radio frame index, radio superframe index.
  • time information corresponding to the time unit at which the start time starts is P, and the time information corresponding to other time units after the time unit is sequentially numbered starting from P, wherein the P is an integer not less than zero.
  • the P may be 0.
  • time information corresponding to each time unit is the same.
  • the information determining unit 821 may further include a third subunit 821c and a fourth subunit 821d as shown in FIG. 14, wherein:
  • the third subunit 821c is configured to detect a signal carrying time information of the local cell, and determine a sequence form of the signal.
  • the fourth subunit 821d is configured to determine time information of the local cell according to the sequence form.
  • the data transmission unit 822 is configured to perform data transmission with the user equipment according to the time information of the local cell.
  • the data for performing data transmission does not include time information of the local cell. Further optionally, the data for performing data transmission does not include a public land mobile network identifier of the local cell.
  • the time information of the local cell is used for at least one of the following: data scrambling code, HARQ timing.
  • FIG. 15 is a schematic structural diagram of a system for data transmission according to an embodiment of the present invention.
  • the system for data transmission in the embodiment of the present invention as shown in the figure may include at least a user equipment 910 and a transmission device 920.
  • FIG. 16 is a schematic structural diagram of another user equipment according to an embodiment of the present invention.
  • the user equipment may include: at least one processor 1001, such as a CPU, at least one antenna port 1003, and a memory 1004, at least one.
  • the communication bus 1002 is used to implement connection communication between these components.
  • the antenna port 1003 in the embodiment of the present invention is used for signaling or data communication with other node devices.
  • the memory 1004 may be a high speed RAM memory or a non-volatile memory such as at least one disk memory.
  • the memory 1004 may also be at least one storage device located away from the foregoing processor 1001.
  • a set of program codes is stored in the memory 1004, and the processor 1001 is configured to call the program code stored in the memory 1004 for performing the following operations:
  • the data for performing data transmission does not include time information of the first cell.
  • the processor 1001 performs data transmission with the first cell according to the determined data sending time, and the specific operations are:
  • the determining, by the processor 1001, the time information of the first cell according to the preset rule is:
  • the time information of the second cell includes at least one of the following: a slot index, a subframe index, and a wireless Frame index, wireless superframe index.
  • the processor 1001 determines, according to the time information of the second cell and the data sending time, that the time information corresponding to the data sending time is:
  • the time information corresponding to the time at which the data transmission time is specified by the data transmission time on the second cell is determined as the time information corresponding to the data transmission time.
  • the specified time interval includes at least one of the following: M OFDM symbols, N time slots, where M, N are integers not less than zero.
  • the time information of the first cell is located in a predefined time information range
  • the predefined time information is time information corresponding to each time unit included in the first cell data transmission start time to the data transmission end time, and the time unit includes at least one of the following: one time slot, one child a frame, a radio frame, and a radio superframe; the time information corresponding to the time unit includes at least one of the following: a slot index, a subframe index, a radio frame index, and a radio superframe index.
  • the time information corresponding to the time unit at which the start time starts is P, and the time information corresponding to other time units after the time unit is sequentially numbered starting from P, wherein the P is an integer not less than zero.
  • the P may be zero.
  • the time information corresponding to each time unit is the same.
  • the processor 1001 determines, according to the time information of the second cell and the data sending time, that the time information corresponding to the data sending time is:
  • the time information of the first cell is time information corresponding to the first cell data transmission unit
  • the data transmission unit includes at least one of the following: one time slot, one subframe, one radio frame, and one a wireless superframe
  • the time information corresponding to the data transmission unit includes at least one of the following: a slot index, a subframe index, a radio frame index, and a radio superframe index.
  • the time information of the first cell is used for at least one of the following: data scrambling code, HARQ timing.
  • the first cell is a cell on the unlicensed spectrum.
  • FIG. 17 is a schematic structural diagram of another transmission device according to an embodiment of the present invention.
  • the user equipment may include: at least one processor 1101, such as a CPU, at least one antenna port 1103, and a memory 1104.
  • Communication bus 1102. the communication bus 1102 is used to implement connection communication between these components.
  • the antenna port 1103 in the embodiment of the present invention is used for signaling or data communication with other node devices.
  • the memory 1104 may be a high speed RAM memory or a non-volatile memory such as at least one disk memory.
  • the memory 1104 may also be at least one storage device located away from the foregoing processor 1101.
  • a set of program codes is stored in the memory 1104, and the processor 1101 is configured to call the program code stored in the memory 1104 for performing the following operations:
  • Data transmission is performed with the user equipment according to the determined data transmission time.
  • the data for performing data transmission does not include time information of the local cell.
  • the data for performing data transmission does not include time information of the first cell at a specific time, where the specific time includes any time between M time and N time, and the M time represents the first time a data transmission start time of a cell, where the N time indicates that the first cell carries a data transmission start time of time information of the first cell.
  • At least one operation of the data transmission data from the data bit generation to the process of being sent by the antenna does not include the time information of the first cell, and the process of the experience includes at least one of the following: Item operations: scrambling code, modulation mapping, layer mapping, precoding, resource element mapping, OFDM signal generation, change precoding, SC-FDMA signal generation, antenna port mapping.
  • the initialization value of the scrambling code sequence used by the data transmission data does not include time information.
  • the determining the initialization value of the scrambling code sequence used by the data transmission data includes:
  • the initial value of the scrambling code sequence used by the data carried by the PDSCH is The A represents any real number irrelevant to the first cell time information, the n RNTI represents a radio network temporary identification RNTI corresponding to the PDSCH, and the q represents an arbitrary value related to the number of code words, An identification ID of a cell indicating data transmission;
  • the initial value of the scrambling code sequence used by the data carried by the PMCH is The I represents any real number that is independent of the first cell time information, Representing an identification ID corresponding to the MBSFN of the multimedia broadcast multicast service single frequency network;
  • the initial value of the scrambling code sequence used by the data carried by the PCFICH is The B represents any real number that is independent of the first cell time information, An identification ID of a cell indicating data transmission;
  • the initial value of the scrambling code sequence used by the data carried by the PDCCH is The C represents any real number that is independent of the first cell time information, An identification ID of a cell indicating data transmission;
  • the initial value of the scrambling code sequence used by the data carried by the EPDCCH is The D represents any real number that is independent of the first cell time information, Indicates an ID of an EPDCCH, where m represents an EPDCCH set label;
  • the initial value of the scrambling code sequence used by the data carried by the PHICH is The E represents any real number that is independent of the first cell time information, An identification ID of a cell indicating data transmission;
  • the initial value of the scrambling code sequence used by the CRS or the PRS generation is The F represents any real number that is independent of the first cell time information, and the l represents an OFDM symbol index in one subframe, and the value of the N CP is related to a CP type, and the CP type includes a normal CP and Extended CP, said An identification ID of a cell indicating data transmission;
  • the initialization value of the scrambling code sequence used by the MBSFN RS generation is The G represents any real number that is independent of the first cell time information, and the l represents an OFDM symbol index within one subframe, Representing an identification ID corresponding to the single-frequency network of the multimedia broadcast multicast service;
  • the initialization value of the scrambling code sequence used by the user equipment specific reference signal generation is The H represents any real number that is independent of the first cell time information, An identification ID of a cell indicating data transmission, the n RNTI indicating a radio network temporary identification RNTI corresponding to the PDSCH;
  • an initial value of the scrambling code sequence used by the CSI-RS generation is The J represents any real number that is independent of the first cell time information, Indicates the identification ID of the channel state information CSI.
  • the processor 1101 performs data transmission with the local cell according to the determined data sending moment, where the specific operation is:
  • the determining, by the processor 1101, the time information of the local cell according to the preset rule is:
  • the time information of the second cell includes at least one of the following: a slot index, a subframe index, a radio frame index, and a radio superframe index.
  • the processor 1101 determines, according to the time information of the second cell and the data sending time, that the time information corresponding to the data sending time is:
  • the time information corresponding to the time at which the data transmission time is specified by the data transmission time on the second cell is determined as the time information corresponding to the data transmission time.
  • the specified time interval includes at least one of the following: M OFDM symbols, N time slots, where M, N are integers not less than zero.
  • the time information of the local cell is located in a predefined time information range
  • the predefined time information is time information corresponding to each time unit included in the current data transmission start time to the data transmission end time, and the time unit includes at least one of the following: one time slot, one time frame a radio frame, a radio superframe; the time information corresponding to the time unit includes at least one of the following: a slot index, a subframe index, a radio frame index, and a radio superframe index.
  • the time information corresponding to the time unit at which the start time starts is P, and the time information corresponding to other time units after the time unit is sequentially numbered starting from P, wherein the P is an integer not less than zero.
  • the P may be zero.
  • the time information corresponding to each time unit is the same.
  • the processor 1101 determines, according to the time information of the second cell and the data sending time, that the time information corresponding to the data sending time is:
  • the time information of the local cell is time information corresponding to the data transmission unit of the local cell, where the data transmission unit includes at least one of the following: one time slot, one subframe, one radio frame, and one wireless super a frame; the time information corresponding to the data transmission unit includes at least one of the following: a slot index, a subframe index, a radio frame index, and a radio superframe index.
  • the time information of the local cell is used in at least one of the following: data scrambling code, HARQ timing.
  • the current cell is a cell on the unlicensed spectrum.
  • the embodiment of the present invention further provides a computer storage medium, where the computer storage medium stores a program, and the program includes a plurality of instructions for executing a data transmission method described in the embodiments of the present invention. Part or all of the steps.
  • the embodiment of the present invention first determines the data transmission time of the first cell, and then performs data transmission with the first cell according to the determined data transmission time, for example, according to the data transmission time of the first cell in the licensed spectrum, the unlicensed spectrum and the first
  • the data transmission of the cell can determine the time information on the unlicensed spectrum, ensure normal data communication between LTE devices, and have high efficiency and resources for using spectrum resources. The advantage of small overhead.
  • the storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

Abstract

Des modes de réalisation de la présente invention portent sur un procédé de transmission de données comprenant les étapes consistant : à déterminer le temps de transmission des données d'une première cellule ; à transmettre des données à la première cellule selon le temps de transmission de données déterminé. De manière correspondante, les modes de réalisation de la présente invention concernent également un équipement utilisateur, un système et un équipement de transmission. Par la présente invention, des informations de temps sur des spectres de fréquence non autorisés peuvent être déterminés, une transmission de données normale entre un équipement LTE peut être garantie, et la présente invention présente les avantages d'une grande efficacité d'utilisation et de faible surdébit de ressources des ressources du spectre de fréquence.
PCT/CN2015/072027 2015-01-30 2015-01-30 Procédé de transmission de données, équipement utilisateur, système et équipement de transmission WO2016119250A1 (fr)

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CN201580005952.5A CN106031073B (zh) 2015-01-30 2015-01-30 一种数据传输的方法、用户设备、传输设备及系统

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