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WO2015106393A1 - Procédé, équipement utilisateur (ue) et station de base pour une transmission de données - Google Patents

Procédé, équipement utilisateur (ue) et station de base pour une transmission de données Download PDF

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Publication number
WO2015106393A1
WO2015106393A1 PCT/CN2014/070616 CN2014070616W WO2015106393A1 WO 2015106393 A1 WO2015106393 A1 WO 2015106393A1 CN 2014070616 W CN2014070616 W CN 2014070616W WO 2015106393 A1 WO2015106393 A1 WO 2015106393A1
Authority
WO
WIPO (PCT)
Prior art keywords
cell
authorized
unlicensed
data
sent
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2014/070616
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English (en)
Chinese (zh)
Inventor
黄曲芳
戴明增
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to PCT/CN2014/070616 priority Critical patent/WO2015106393A1/fr
Priority to CN201480001031.7A priority patent/CN105191384B/zh
Publication of WO2015106393A1 publication Critical patent/WO2015106393A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/14—Spectrum sharing arrangements between different networks

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a data transmission method, a UE, and a base station.
  • Wireless communication requires the use of frequency resources.
  • the Institute of Electrical and Electronics Engineers (IEEE) divides the spectrum into frequency bands and specifies the use of each frequency band. It can be used in Long Term Evolution (LTE), Universal Mobile Telecommunications System (UMTS), Global System for Mobile communication (GSM), etc., and operators purchase the right to use the frequency. It is legal to use these spectrums to deploy wireless communication networks, and other individuals and organizations cannot use these spectrums for wireless communication.
  • This type of spectrum is called a licensed spectrum.
  • the IEEE also specifies some unlicensed spectrum that anyone can use to communicate without paying a fee and without applying. This type of spectrum is mainly distributed around 2.4 GHz and 5 GHz.
  • the unlicensed cell is different from the authorized cell at the time of deployment.
  • the base station must constantly detect whether anyone is using the unlicensed spectrum, and if someone is using it, the user equipment (UE) and its Unreachable cells that are connected cannot communicate.
  • the cell is usually not authorized to use Time Division Duplex (TDD). Mode work.
  • TDD Time Division Duplex
  • the user equipment UE communicates with the unlicensed cell, the spectrum resources of the unlicensed cell may be preempted in the communication process. At this time, the unlicensed cell and the UE can no longer communicate through the spectrum resources of the unlicensed cell.
  • Embodiments of the present invention provide a method for data transmission, a UE, and a base station, so that an unlicensed cell and a user equipment can communicate with each other when spectrum resources of an unlicensed cell are unavailable, and when unlicensed cell spectrum resources are unavailable. Impact on data transmission, increase data transmission rate, improve spectrum utilization, and reduce resource waste.
  • embodiments of the present invention use the following technical solutions:
  • an embodiment of the present invention provides a UE, where the method includes: a determining unit and a communication unit;
  • the determining unit is configured to determine that a spectrum resource of an unlicensed cell is unavailable, and the communications unit is configured to communicate with the unlicensed cell by using an authorized cell.
  • the communication unit is specifically configured to:
  • the UE has sent data to the unlicensed cell, receiving context information corresponding to the UE sent by the unlicensed cell by using the authorized cell, in a preset time period; or if the UE has been The unlicensed cell sends the first data, does not receive the context information corresponding to the UE sent by the unlicensed cell, and retransmits the first data to the unlicensed cell by using the authorized cell. ; or
  • the context information corresponding to the unlicensed cell that is sent by the UE to the unlicensed cell carries the second NACK information, and receives the second NACK information that is sent by the unlicensed cell by using the authorized cell.
  • the UE receives the data sent by the unlicensed cell, sending the context information corresponding to the unlicensed cell to the unlicensed cell by using the authorized cell within a preset time period;
  • the determining unit is further configured to:
  • the communication unit is specifically configured to:
  • the communication unit is also used to:
  • the UE further includes: a setting unit;
  • the setting unit is configured to: after the communication unit sends the context information corresponding to the unlicensed cell to the unlicensed cell by using the authorized cell, in a preset time period, setting the unlicensed cell corresponding to the Priority information of context information;
  • the communication unit is specifically configured to: send, according to the priority information of the context information, context information corresponding to the unlicensed cell to the authorized cell, in a preset time period, so that the authorized cell performs the The context information corresponding to the unlicensed cell is sent to the unlicensed cell.
  • the communication unit is specifically configured to:
  • PUSCH physical uplink shared channel resource
  • PUCCH dedicated physical uplink control channel resource
  • the UE further includes: a determining unit;
  • the communication unit is specifically configured to:
  • the communication unit is specifically configured to:
  • the UE further includes: an identifier unit;
  • the identifier unit is configured to: use the first NACK information And the identifier is used to indicate that the data corresponding to the first NACK information is sent to the unlicensed cell by using the authorized cell;
  • the communication unit is specifically configured to: send, by using the PUSCH resource allocated by the authorized cell or a PUCCH resource allocated to the UE, data corresponding to the identified first NACK information to the authorized cell, so that the Authorizing the cell to send data corresponding to the first NACK information to the unlicensed cell;
  • the identifier unit is configured to: The communication unit identifies the first data by using the authorized cell to retransmit the first data to the unlicensed cell, where the identifier is used to indicate that the first data is sent to the unlicensed cell;
  • the communication unit is specifically configured to: send, by using the PUSCH resource allocated by the authorized cell or the PUCCH resource allocated to the UE, the first data that is identified to the authorized cell, to enable the authorized cell Transmitting the first data to the unlicensed cell.
  • the physical uplink shared channel resource PUSCH allocated by the authorized cell is specifically:
  • the PUSCH resource reserved by the authorized cell to the UE When the spectrum resource of the unlicensed cell is unavailable, the PUSCH resource reserved by the authorized cell to the UE; or
  • the PUSCH resource dynamically allocated by the authorized cell to the UE.
  • the determining unit is specifically configured to:
  • the determining unit receives a message that the unlicensed cell spectrum resource sent by the unlicensed cell is unavailable; or
  • the unlicensed cell and the authorized cell do not share the same base station, but the ideal backhaul link exists between the unlicensed cell and the base station of the authorized cell, the authorized cell or the location is received.
  • the message that the unlicensed cell spectrum resource is not available is sent by the unlicensed cell, where the message that the unlicensed cell spectrum resource that is sent by the authorized cell is unavailable is sent by the unlicensed cell.
  • the context information specifically includes at least one of the following parameters:
  • Hybrid automatic repeat request HARQ feedback power headroom report PHR, buffer status report BSR, robust header compression ROHC, radio link control RLC status report, packet data aggregation protocol PDCP status report.
  • the HARQ feedback specifically includes:
  • bit bitmap of the HARQ process number, where the bit bitmap includes a plurality of bits, and the value of the bit corresponding to the HARQ process number of each transport block is used to indicate ACK or NACK control character information of each transport block, and no transmission
  • the value of the bit corresponding to the HARQ process number corresponding to the subframe transmitted by the block is null; or
  • bit bitmap of the HARQ process number, where the bit bitmap includes a plurality of bits, and the value of the bit corresponding to the HARQ process number of each transport block is used to indicate ACK or NACK control character information of each transport block, and no transmission
  • the value of the bit corresponding to the HARQ process number corresponding to the subframe of the block transmission is used to indicate the ACK control character information;
  • a bit bitmap of the HARQ process number where two bits in the bit bitmap represent one HARQ process number, and the value of two bits corresponding to the HARQ process number of each transport block is used to indicate an ACK of each transport block or
  • the NACK controls the character information, and the values of the two bits corresponding to the HARQ process number corresponding to the subframe in which the transport block is not transmitted are used to represent the D TX control character information.
  • an embodiment of the present invention provides a base station, including: a determining unit and a communication unit;
  • the determining unit is configured to determine that a spectrum resource of an unlicensed cell is unavailable, and the unlicensed The right cell is served by the base station;
  • the communication unit is configured to pass the unlicensed cell and the authorized cell, and the user equipment
  • the UE performs communication, and the authorized cell is co-located or cross-site set with the unauthorized cell.
  • the communication unit is specifically configured to:
  • the communication unit receives the context information corresponding to the unlicensed cell sent by the UE by using the unlicensed cell, the context information corresponding to the unlicensed cell carries the second NACK information, and the authorized cell is heavy. Sending data corresponding to the second NACK information to the UE;
  • the communication unit has sent data to the UE, receiving context information corresponding to the unlicensed cell sent by the UE by using the authorized cell, in a preset time period;
  • the communication unit has sent the second data to the UE, the context information corresponding to the unlicensed cell sent by the UE is not received within a preset time period, and the unauthorized cell is heavy to the UE.
  • the communication unit receives the data sent by the UE, the context information corresponding to the UE is sent to the first base station by using the authorized cell in a preset time period;
  • the communication unit has received the first data sent by the UE, receiving the first data that is retransmitted by the UE in a preset time period.
  • the determining unit is further configured to:
  • the communication unit is specifically configured to:
  • the communication unit is also used to:
  • the base station further includes: an identifier unit;
  • the identifier unit is configured to identify data corresponding to the second NACK information, where Identifying, by the authorized cell, that data corresponding to the second NACK information is sent to the UE;
  • the communication unit is configured to: send data corresponding to the identified second NACK information to the authorized cell, so that the authorized cell sends data corresponding to the second NACK information according to the identifier to The UE;
  • the context information corresponding to the unlicensed cell is not successfully sent to the unlicensed cell in a preset time period, where the identifier unit is used to: And the identifier is used to indicate that the second data is sent to the UE;
  • the communication unit is configured to send the second data to the authorized cell, so that the authorized cell sends the second data to the UE according to the identifier.
  • an embodiment of the present invention provides a data transmission method, where the method includes:
  • the UE determines that the spectrum resource of the unlicensed cell is unavailable
  • the UE communicates with the unlicensed cell through an authorized cell.
  • the UE by using the authorization cell and the unlicensed cell, to communicate through the authorized cell, specifically includes:
  • the UE If the UE receives the context information corresponding to the UE that is sent by the unlicensed cell, and the first NACK information carried in the context information corresponding to the UE, the UE retransmits the first by using the authorized cell. Data corresponding to the NACK information to the unlicensed cell; or
  • the UE receives the context information corresponding to the UE sent by the unlicensed cell by using the authorized cell in a preset time period; or
  • the UE If the UE has sent the first data to the unlicensed cell, the context information corresponding to the UE sent by the unlicensed cell is not received within a preset time period, and the UE passes the Sending, by the authorized cell, the first data to the unlicensed cell; or
  • the UE receives the second retransmission of the unlicensed cell by the authorized cell. Data corresponding to the NACK information; or
  • the UE If the UE receives the data sent by the unlicensed cell, the UE sends the context information corresponding to the unlicensed cell to the unlicensed cell by using the authorized cell within a preset time period; or
  • the UE If the UE has received the second data sent by the unlicensed cell, the context information corresponding to the unlicensed cell is not successfully sent to the unlicensed cell within a preset time period, and the UE passes the authorization.
  • the cell receives the second data that is retransmitted by the unlicensed cell.
  • the method further includes:
  • the UE determines whether the spectrum resource of the unlicensed cell is restored and available;
  • the receiving, by the UE, the context information corresponding to the UE that is sent by the unlicensed cell by using the authorized cell, in the preset time period specifically includes:
  • the UE receives the context information corresponding to the UE that is sent by the unlicensed cell by using the authorized cell in the second preset time period;
  • the sending, by the UE, the context information corresponding to the unlicensed cell to the unlicensed cell by using the authorized cell, in the preset time period specifically includes:
  • the UE sends the context information corresponding to the unlicensed cell to the unlicensed cell by using the authorized cell in the second preset time period;
  • the method further includes:
  • the UE communicates with the unlicensed cell through the spectrum resource of the unlicensed cell.
  • the UE sends, by using the authorized cell, context information corresponding to the unauthorized cell to the Before authorizing the cell, the method further includes:
  • the UE corresponding to the unauthorized cell by using the authorized cell within a preset time period The sending of the context information to the unlicensed cell specifically includes:
  • the UE retransmits the first NACK information corresponding to the authorized cell by using any one of the first possible implementation manner to the third possible implementation manner.
  • the data to the unlicensed cell specifically includes:
  • PUSCH physical uplink shared channel resource
  • PUCCH dedicated physical uplink control channel resource
  • the UE receives, by the UE, the context information corresponding to the UE that is sent by the unlicensed cell by using the authorized cell, in the preset time period, specifically:
  • Retransmitting the first data entity to the unlicensed cell by using the authorized cell by the UE includes:
  • PUSCH physical uplink shared channel resource
  • PUCCH dedicated physical uplink control channel resource
  • the data that the UE receives the second NACK information that is retransmitted by the unlicensed cell by using the authorized cell includes:
  • PUSCH physical uplink shared channel resource
  • PUCCH dedicated physical uplink control channel resource
  • Receiving, by the authorized cell, the second data entity that is retransmitted by the unauthorized cell by using the authorized cell includes:
  • the UE receives the second data that is retransmitted by the unlicensed cell by using a MAC entity of the authorized cell.
  • the method before the UE and the unlicensed cell communicate with each other by using the authorized cell, in combination with any one of the first possible implementation manner to the fourth possible implementation manner, the method also includes:
  • the UE transmitting the context information corresponding to the unlicensed cell to the unlicensed cell by using the authorized cell in the preset time period specifically includes:
  • the UE sends the foregoing by the authorized cell within a preset time period.
  • the UE in combination with the first possible implementation manner or the fourth possible implementation manner, the UE retransmits the data corresponding to the first NACK information to the
  • the authorized community specifically includes:
  • the UE identifies the data corresponding to the first NACK information, where the identifier is used to indicate that data corresponding to the first NACK information is sent to the unauthorized by the authorized cell.
  • Retransmitting the first data entity to the unlicensed cell by using the authorized cell by the UE includes:
  • the physical uplink shared channel resource PUSCH allocated by the authorized cell is specifically:
  • the PUSCH resource reserved by the authorized cell to the UE When the spectrum resource of the unlicensed cell is unavailable, the PUSCH resource reserved by the authorized cell to the UE; or
  • the PUSCH resource dynamically allocated by the authorized cell to the UE.
  • the eighth possible implementation manner Specifically include:
  • the UE detects whether the spectrum resource of the unlicensed cell is unavailable; or
  • the UE receives the authorized cell or the un The message that the unlicensed cell spectrum resource is not available is sent by the authorized cell, where the message that the unlicensed cell spectrum resource that is sent by the authorized cell is unavailable is sent by the unlicensed cell.
  • the context information specifically includes at least one of the following Item parameters:
  • Hybrid automatic repeat request HARQ feedback power headroom report PHR, buffer status report BSR, robust header compression ROHC, radio link control RLC status report, packet data aggregation protocol PDCP status report.
  • the HARQ feedback specifically includes:
  • bit bitmap of the HARQ process number, where the bit bitmap includes a plurality of bits, and the value of the bit corresponding to the HARQ process number of each transport block is used to indicate ACK or NACK control character information of each transport block, and no transmission
  • the value of the bit corresponding to the HARQ process number corresponding to the subframe transmitted by the block is null; or
  • bit bitmap of the HARQ process number, where the bit bitmap includes a plurality of bits, and the value of the bit corresponding to the HARQ process number of each transport block is used to indicate ACK or NACK control character information of each transport block, and no transmission
  • the value of the bit corresponding to the HARQ process number corresponding to the subframe of the block transmission is used to indicate the ACK control character information;
  • a bit bitmap of the HARQ process number where two bits in the bit bitmap represent one HARQ process number, and the value of two bits corresponding to the HARQ process number of each transport block is used to indicate an ACK of each transport block or
  • the NACK controls the character information, and the values of the two bits corresponding to the HARQ process number corresponding to the subframe in which the transport block is not transmitted are used to represent the D TX control character information.
  • an embodiment of the present invention provides a data transmission method, where the method includes: determining, by a first base station, that spectrum resources of an unlicensed cell are unavailable, where the unlicensed cell is served by the first base station;
  • the first base station communicates with the user equipment UE via the authorized cell and the unlicensed cell, and the authorized cell is served by the second base station or the first base station.
  • the first base station by using the authorized cell and the unlicensed cell, to communicate with the UE, specifically includes:
  • the first base station receives the unsent by the UE via the unlicensed cell
  • the context information corresponding to the authorized cell carries the second NACK information, and the first base station retransmits the data corresponding to the second NACK information to the UE by using the authorized cell;
  • the first base station If the first base station has sent data to the UE via the unlicensed cell, the first base station receives, by using the unlicensed cell, the UE, by using the authorized cell, within a preset time period. Context information corresponding to the unlicensed cell;
  • the context information corresponding to the unlicensed cell sent by the UE is not received within a preset time period, where the first The base station retransmits the second data to the UE by using the authorized cell; if the first base station carries the first NACK information in the context information corresponding to the UE sent by the unlicensed cell to the UE, Receiving, by the first base station, data corresponding to the first NACK information that is retransmitted by the UE by using the authorized cell;
  • the first base station If the first base station receives the data sent by the UE by using the unlicensed cell, the first base station sends the context information corresponding to the UE to the UE by using the authorized cell within a preset time period. ;
  • the first base station If the first base station has received the first data sent by the UE via the unlicensed cell, the first base station receives the first data that is retransmitted by the UE by using the authorized cell.
  • the first base station before the first base station communicates with the UE by using the authorized cell and the unlicensed cell, the first base station further includes: The first base station determines whether the spectrum resource of the unlicensed cell is restored and available;
  • the first base station receives context information corresponding to the unlicensed cell sent by the UE through the authorized cell in a second preset time period;
  • the first base station And sending, by the first base station, the context information corresponding to the UE to the UE by using the authorized cell, where the first base station includes:
  • the first base station sends the context information corresponding to the UE to the UE by using the authorized cell in the second preset time period;
  • the method further includes: And if the recovery is available, the first base station communicates with the UE by using the first base station spectrum resource.
  • the first base station in combination with the first possible implementation manner, retransmits the data corresponding to the second NACK information to the UE by using the authorized cell, and the method includes:
  • the first base station identifies the data corresponding to the second NACK information, where the identifier is used to indicate that data corresponding to the second NACK information is sent to the UE;
  • the re-transmitting the second data by the first base station to the UE by the authorized cell includes: the first base station identifying the second data, where the identifier is used to indicate that the second data is sent to the Said UE;
  • the first base station sends the second data to the second base station via the unlicensed cell, so that the authorized cell sends the second data to the UE according to the identifier.
  • an embodiment of the present invention provides a user equipment UE, including: a processor and a transceiver;
  • the processor is configured to determine that a spectrum resource of an unlicensed cell is unavailable
  • the transceiver is configured to communicate with the unlicensed cell by using an authorized cell.
  • the transceiver is specifically configured to: if the UE receives the context information corresponding to the UE sent by the unlicensed cell, the context corresponding to the UE The first NACK information carried in the information, the data corresponding to the first NACK information is retransmitted by the authorized cell to the unlicensed cell; or
  • the UE has sent data to the unlicensed cell, receiving context information corresponding to the UE sent by the unlicensed cell by using the authorized cell, in a preset time period; or if the UE has been The unlicensed cell sends the first data, does not receive the context information corresponding to the UE sent by the unlicensed cell, and retransmits the first data to the unlicensed cell by using the authorized cell. ; or
  • the context information corresponding to the unlicensed cell sent by the UE to the unlicensed cell carries the second NACK information, receiving the unlicensed cell by using the authorized cell Transmitting data corresponding to the second NACK information;
  • the UE receives the data sent by the unlicensed cell, sending the context information corresponding to the unlicensed cell to the unlicensed cell by using the authorized cell within a preset time period;
  • the UE If the UE has received the second data sent by the unlicensed cell, the context information corresponding to the unlicensed cell is not successfully sent to the unlicensed cell within a preset time period, and the authorized cell receives the The second data of the unauthorised cell retransmission.
  • the processor is further configured to:
  • the transceiver is specifically used to:
  • the transceiver is also used to:
  • the processor is further configured to: after the transceiver sends the context information corresponding to the unlicensed cell to the unlicensed cell by using the authorized cell, in the preset time period, setting the unlicensed cell corresponding Priority information of context information;
  • the transceiver is specifically configured to: send, according to the priority information of the context information, context information corresponding to the unlicensed cell to the authorized cell, in a preset time period, so that the authorized cell performs the The context information corresponding to the unlicensed cell is sent to the unlicensed cell.
  • the transceiver in combination with any one of the first possible implementation to the third possible implementation, is specifically configured to:
  • the transceiver is specifically configured to:
  • the transceiver in combination with any one of the first possible implementation manner to the fourth possible implementation manner, is specifically configured to:
  • the processor is further configured to: use the first NACK The data corresponding to the information is used to identify that the data corresponding to the first NACK information is sent to the unlicensed cell by using the authorized cell;
  • the transceiver is specifically configured to: send data corresponding to the identified first NACK information to the authorized cell by using a PUSCH resource allocated by the authorized cell or a PUCCH resource allocated to the UE, so that the The second base station authorizes the cell to send data corresponding to the first NACK information to the unlicensed cell;
  • the identifier unit is configured to: And the identifier is used to indicate that the first data is sent to the unlicensed cell, before the re-sending the first data to the unlicensed cell by the authorized cell.
  • the transceiver is specifically configured to: send the identified first data to the authorized cell by using a PUSCH resource allocated by the authorized cell or a PUCCH resource allocated to the UE, to enable the authorized cell Transmitting the first data to the unlicensed cell.
  • the physical uplink shared channel resource PUSCH allocated by the authorized cell is specifically:
  • the PUSCH resource reserved by the authorized cell to the UE When the spectrum resource of the unlicensed cell is unavailable, the PUSCH resource reserved by the authorized cell to the UE; or
  • the PUSCH resource dynamically allocated by the authorized cell to the UE.
  • the processor is specifically configured to:
  • the determining unit receives a message that the unlicensed cell spectrum resource sent by the unlicensed cell is unavailable; or
  • the context information specifically includes at least one of the following parameters:
  • Hybrid automatic repeat request HARQ feedback power headroom report PHR, buffer status report BSR, robust header compression ROHC, radio link control RLC status report, packet data aggregation protocol PDCP status report.
  • the HARQ feedback specifically includes:
  • bit bitmap of the HARQ process number, where the bit bitmap includes a plurality of bits, and the value of the bit corresponding to the HARQ process number of each transport block is used to indicate ACK or NACK control character information of each transport block, and no transmission
  • the value of the bit corresponding to the HARQ process number corresponding to the subframe transmitted by the block is null; or
  • bit bitmap of the HARQ process number, where the bit bitmap includes a plurality of bits, and the value of the bit corresponding to the HARQ process number of each transport block is used to indicate ACK or NACK control character information of each transport block, and no transmission
  • the value of the bit corresponding to the HARQ process number corresponding to the subframe of the block transmission is used to indicate the ACK control character information;
  • a bit bitmap of the HARQ process number where two bits in the bit bitmap represent one HARQ process number, and the value of two bits corresponding to the HARQ process number of each transport block is used to indicate an ACK of each transport block or NACK control character information, the value of two bits corresponding to the HARQ process number corresponding to the subframe in which no transport block is transmitted is used to represent the D TX control character letter.
  • an embodiment of the present invention provides a base station, where the base station includes: a processor and a transceiver;
  • the processor is configured to determine that a spectrum resource of an unlicensed cell is unavailable, and the unlicensed cell is served by the base station;
  • the transceiver is configured to communicate with the user equipment UE via the unlicensed cell and the authorized cell, where the authorized cell is set with the unlicensed cell in the same station or across stations.
  • the transceiver is specifically configured to: if the transceiver receives context information corresponding to the unlicensed cell sent by the UE, the unlicensed cell The corresponding context information carries the second NACK information, and the data corresponding to the second NACK information is retransmitted by the authorized cell to the UE;
  • the transceiver has sent data to the U E, receiving context information corresponding to the unlicensed cell sent by the U E by using the authorized cell, in a preset time period;
  • the transceiver has sent the second data to the UE, the context information corresponding to the unlicensed cell sent by the UE is not received within a preset time period, and the retransmission is performed to the UE by using the authorized cell.
  • the second data
  • the transceiver And receiving, by the transceiver, the N-ACK information in the context information corresponding to the UE that is sent by the UE, and receiving data corresponding to the first NACK information that is retransmitted by the UE by using the authorized cell;
  • the transceiver receives the data sent by the UE, the context information corresponding to the UE is sent to the UE by using the authorized cell in a preset time period;
  • the transceiver If the transceiver has received the first data sent by the UE, the context information corresponding to the UE is not successfully sent to the UE within a preset time period, and the UE is retransmitted by the authorized cell.
  • the first data If the transceiver has received the first data sent by the UE, the context information corresponding to the UE is not successfully sent to the UE within a preset time period, and the UE is retransmitted by the authorized cell. The first data.
  • the processor is further configured to:
  • the transceiver is specifically used to:
  • the transceiver is also used to:
  • the processor In a third possible implementation manner, in combination with the first possible implementation manner, if the UE sends the second NACK information to the context information corresponding to the unlicensed cell sent by the transceiver, the processor And the identifier is further used to identify the data corresponding to the second NACK information, where the identifier is used to indicate that data corresponding to the second NACK information is sent to the UE by using the authorized cell;
  • the transceiver is specifically configured to: send data corresponding to the identified second NACK information to the authorized cell, so that the authorized cell sends data corresponding to the second NACK information according to the identifier to The UE;
  • the identifier is The unit is configured to: identify the second data, where the identifier is used to indicate that the second data is sent to the UE;
  • the transceiver is configured to send the second data to the authorized cell, so that the authorized cell sends the second data to the UE according to the identifier.
  • the embodiment of the present invention provides a data transmission method, a UE, and a base station. According to the embodiment of the present invention, when a spectrum resource of an unlicensed cell is unavailable, the UE and the unlicensed cell can communicate with each other through the authorized cell, thereby reducing Impact on data transmission when unlicensed cell spectrum resources are unavailable, increase data transmission rate, improve spectrum utilization, and reduce resource waste.
  • FIG. 1 is a schematic structural diagram of an unlicensed cell and an authorized cell
  • FIG. 2 is a schematic structural diagram 1 of a UE
  • FIG. 3 is a schematic structural diagram 2 of a UE
  • 5 is a schematic structural diagram 4 of a UE
  • FIG. 6 is a schematic structural diagram 1 of a base station
  • FIG. 7 is a schematic diagram of a base station structure
  • FIG. 8 is a schematic diagram of a data transmission method
  • FIG. 9 is a schematic diagram of an interaction process between the UE and the unlicensed cell for data transmission
  • FIG. 11a is a schematic diagram 1 of a feedback format of a hybrid automatic repeat request HARQ
  • FIG. 1b is a schematic diagram 2 of a feedback format of a hybrid automatic repeat request HARQ
  • FIG. 11c is a schematic diagram 3 of a feedback format of a hybrid automatic repeat request HARQ
  • FIG. 11 d is a schematic diagram of a feedback format of a hybrid automatic repeat request HARQ
  • FIG. 1 is a schematic diagram of a feedback format of a hybrid automatic repeat request HARQ
  • FIG. 12 is a data transmission method
  • FIG. 13 is a data.
  • FIG. 14 is a method for data transmission.
  • FIG. 15 is a method for data transmission.
  • FIG. 16 is a diagram of a method for data transmission by the UE and the unlicensed cell.
  • FIG. 17 is a schematic structural diagram of a UE
  • FIG. 18 is a schematic structural diagram of a base station.
  • the middle ellipse is the unlicensed cell coverage, and the user is in the unlicensed cell.
  • the device UE may be in the unlicensed cell and the authorized cell 1 at the same time, or may be in the unlicensed cell and the authorized cell 2 at the same time, and may also be in the unlicensed cell and the authorized cell 3 at the same time or in the unlicensed cell and the authorized cell 4 at the same time; or
  • the UE may also be within the coverage of the unlicensed cell and the multiple authorized cells at the same time. Therefore, one UE may access one unlicensed cell and one authorized cell at the same time, or may simultaneously access one unlicensed cell and multiple authorized cells.
  • the base station of the unlicensed cell may share one base station with the base station of the one authorized cell in the actual deployment process; the base station of the unlicensed cell may not share one base station with the authorized cell. That is, the base station of the unlicensed cell provides the service to the unlicensed cell, and the base station of the authorized cell provides the service to the authorized cell, and the base station of the unlicensed cell and the base station of the authorized cell can be set together or across stations.
  • the spectrum resource of the unlicensed cell may be preempted in the communication process. In this case, the unlicensed cell and the UE cannot Further communication through the spectrum resources of the unlicensed cell brings about some problems.
  • the unlicensed cell may resume after the unlicensed spectrum resource is available.
  • the data is retransmitted to the UE again, thereby causing waste of resources.
  • the present invention provides a method for data transmission, a UE, and a base station of an unlicensed cell, for the problem that the system resources are wasted due to the unavailability of the spectrum resources of the unlicensed cell in the communication process between the UE and the unlicensed cell.
  • the UE and the unlicensed cell can communicate with each other through the authorized cell, thereby reducing the impact on the data transmission when the unlicensed cell spectrum resource is unavailable, increasing the data transmission rate, and improving the spectrum utilization rate. Reduce the waste of resources.
  • the embodiment of the present invention provides a UE, in conjunction with FIG. 2, the UE includes: a determining unit 201 and a communication unit 202;
  • the determining unit 201 is configured to determine that a spectrum resource of an unlicensed cell is unavailable.
  • the communication unit 202 is configured to communicate with the unlicensed cell by using an authorized cell. Specifically, the communication unit 202 is specifically configured to:
  • the UE has sent data to the unlicensed cell, receiving context information corresponding to the UE sent by the unlicensed cell by using the authorized cell, in a preset time period; or if the UE has been The unlicensed cell sends the first data, and the context information corresponding to the UE that is not sent by the unlicensed cell is not received in the preset time period, and the first data is retransmitted to the unlicensed cell by using the authorized cell; or
  • the second NACK information is carried in the context information corresponding to the unlicensed cell that is sent by the UE to the unlicensed cell, and the data corresponding to the second NACK information that is retransmitted by the unlicensed cell by the authorized cell is received;
  • the UE receives the data sent by the unlicensed cell, sending the context information corresponding to the unlicensed cell to the unlicensed cell by using the authorized cell within a preset time period;
  • the UE If the UE has received the second data sent by the unlicensed cell, the context information corresponding to the unlicensed cell is not successfully sent to the unlicensed cell within a preset time period, and the authorized cell receives the The second data of the unauthorized cell retransmission.
  • the determining unit 201 is further configured to:
  • the communication unit 202 is specifically configured to:
  • the communication unit 202 is further configured to:
  • the UE further includes: a setting unit 203;
  • the setting unit 203 is configured to: pass the communication unit in a preset time period Before the authorized cell sends the context information corresponding to the unlicensed cell to the unlicensed cell, setting priority information of the context information corresponding to the unlicensed cell;
  • the communication unit 202 is specifically configured to: send, according to the priority information of the context information, context information corresponding to the unlicensed cell to the authorized cell, in a preset time period, so that the authorized cell will The context information is sent to the unlicensed cell.
  • the communication unit 202 is specifically configured to:
  • PUSCH physical uplink shared channel resource
  • PUCCH dedicated physical uplink control channel resource
  • PUSCH physical uplink shared channel resource
  • PUCCH dedicated physical uplink control channel resource
  • the UE further includes: a determining unit 204;
  • the communication unit 202 is specifically configured to:
  • the resource Passing the PUSCH with the smallest index number among the H PUSCH resources in a preset time period
  • the resource sends the context information corresponding to the unlicensed cell to the authorized cell, so that the authorized cell sends the context information corresponding to the unlicensed cell to the unlicensed cell.
  • the communication unit 202 is specifically configured to:
  • the communication unit 202 transmits the PUSCH resources of the first K authorized cells with the smallest index number in the preset time period.
  • the UE further includes: an identity unit 205;
  • the identifier unit 205 is configured to: use the first NACK The data corresponding to the information is used to identify that the data corresponding to the first NACK information is sent to an unlicensed cell;
  • the communication unit 202 is specifically configured to: send, by using the PUSCH resource that is allocated by the authorized cell, or the PUCCH resource that is allocated to the UE, data that is corresponding to the first NACK information to the authorized cell, so that The authorized cell sends data corresponding to the first NACK information to the unlicensed cell;
  • the identifier unit 205 is configured to: The communication unit identifies the first data by using the authorized cell to retransmit the first data to the unlicensed cell, where the identifier is used to indicate that the first data is sent to the unlicensed cell;
  • the communication unit 202 is specifically configured to: send the identified first data to an authorized cell by using a PUSCH resource allocated by the authorized cell or a PUCCH resource allocated to the UE, so that the authorized cell performs the The first data is sent to the unlicensed cell.
  • the physical uplink shared channel resource PUSCH allocated by the authorized cell is specifically:
  • the determining unit 201 is specifically configured to:
  • the context information specifically includes at least one of the following parameters: hybrid automatic repeat request HARQ feedback, power headroom report PHR, buffer status report BSR, robust header compression ROHC, and radio link control RLC status report. , Packet Data Convergence Protocol PDCP Status Report.
  • the HARQ specifically includes:
  • bit bitmap of the HARQ process number, where the bit bitmap includes a plurality of bits, and the value of the bit corresponding to the HARQ process number of each transport block is used to indicate ACK or NACK control character information of each transport block, and no transmission
  • the value of the bit corresponding to the HARQ process number corresponding to the subframe transmitted by the block is null; or
  • bit bitmap of the HARQ process number, where the bit bitmap includes a plurality of bits, and the value of the bit corresponding to the HARQ process number of each transport block is used to indicate ACK or NACK control character information of each transport block, and no transmission
  • the value of the bit corresponding to the HARQ process number corresponding to the subframe of the block transmission is used to represent the ACK control character information
  • a bit bitmap of the HARQ process number where two bits in the bit bitmap represent one HARQ process number, and the value of two bits corresponding to the HARQ process number of each transport block is used to indicate an ACK of each transport block or
  • the NACK controls the character information, and the values of the two bits corresponding to the HARQ process number corresponding to the subframe in which the transport block is not transmitted are used to represent the D TX control character information.
  • An embodiment of the present invention provides a UE, where the UE includes: a determining unit and a communication unit; The determining unit determines that spectrum resources of the unlicensed cell are unavailable; the communication unit and the unlicensed cell communicate through the authorized cell.
  • the embodiment of the present invention further provides a base station, in conjunction with FIG. 6, comprising: a determining unit 601 and a communication unit 602;
  • the determining unit 601 is configured to determine that a spectrum resource of an unlicensed cell is unavailable, where the unlicensed cell is served by the base station;
  • the communication unit 602 is configured to communicate with the user equipment UE by using the unlicensed cell and the authorized cell, where the authorized cell is co-located or cross-site set with the unauthorized cell.
  • the communication unit 602 is specifically configured to:
  • the communication unit 602 receives the context information corresponding to the unlicensed cell sent by the UE by using the unlicensed cell, the context information corresponding to the unlicensed cell carries the second NACK information, and the authorized cell is used. Retransmitting data corresponding to the second NACK information to the UE;
  • the communication unit 602 has sent data to the UE, receiving context information corresponding to the unlicensed cell sent by the UE through the authorized cell, in a preset time period; if the communication unit 602 has been Transmitting, by the UE, the second data, the context information corresponding to the unlicensed cell sent by the UE is not received in the preset time period, and the second data is retransmitted to the UE by the unlicensed cell; Receiving, by the first NACK information, data corresponding to the first NACK information that is retransmitted by the UE by using the authorized cell;
  • the communication unit 602 receives the data sent by the UE, the context information corresponding to the UE is sent to the first base station by using the authorized cell within a preset time period; if the communication unit 602 has received Receiving, by the UE, the first data that is sent by the UE, and the first data that is retransmitted by the UE is received by the UE.
  • the determining unit 601 is further configured to: Determining, in the first preset time period, whether the spectrum resource of the unlicensed cell is restored and available;
  • the communication unit 602 is specifically configured to:
  • the communication unit 602 is also used to:
  • the base station further includes: an identity unit 603;
  • the identifier unit 603 is configured to identify data corresponding to the second NACK information, where The identifier is used to indicate that the data corresponding to the second NACK information is sent to the UE by using the authorized cell;
  • the communication unit 602 is specifically configured to: send data corresponding to the identified second NACK information to the authorized cell, so that the authorized cell sends data corresponding to the second NACK information according to the identifier. To the UE;
  • the identifier unit 603 is used to The second data is identified, where the identifier is used to indicate that the second data is sent to the UE;
  • the communication unit 602 is configured to send the second data to the authorized cell, so that the authorized cell sends the second data to the UE according to the identifier.
  • An embodiment of the present invention provides a base station, where the base station includes: a determining unit and a communication unit, where the determining unit determines that a spectrum resource of the base station is unavailable, the base station provides a service for an unlicensed cell; The cell communicates with the UE, and the second base station provides services for the authorized cell. Based on the base station, when the spectrum resources of the unlicensed cell are unavailable, the UE and the unlicensed cell can communicate with each other through the second base station, thereby reducing the impact on the data transmission when the unlicensed cell spectrum resource is unavailable, improving the data transmission rate, and improving. Spectrum utilization, reducing waste of resources.
  • the embodiment of the present invention provides a data transmission method, where the method includes:
  • the user equipment UE determines that the spectrum resource of the unlicensed cell is unavailable.
  • the unlicensed cell is a cell that the operator constructs by using an unlicensed spectrum, and uses an unlicensed spectrum to use a lower power to offload part of the wireless communication traffic of the authorized cell at a lower cost, so as to improve the user communication rate.
  • unlicensed cells Since unlicensed cells are difficult to obtain paired unlicensed spectrum when deployed, unlicensed cells typically operate in time division duplex TDD mode. In the TDD mode, the uplink and downlink communications between the UE and the base station of the unlicensed cell use different time slots of the same frequency channel, and different time slots are used to separate the receiving and transmitting channels.
  • Some time slots are used by the base station of the unlicensed cell to send downlink signals to the UE, and some time slots are used by the UE to send uplink signals to the base stations of the unlicensed cell. Further, since the unlicensed spectrum belongs to a common spectrum resource, the unlicensed spectrum may be preempted at any time during communication between the UE and the unlicensed cell, causing unlicensed cell spectrum resources to be unavailable, which may be for the UE and unauthorized. The communication of the cell has a certain impact, such as causing waste of resources.
  • the technical solution in the present invention is a technical solution in the process of data transmission based on the UE and the unlicensed cell, where the process of data transmission between the UE and the unlicensed cell is: the UE and the unlicensed cell.
  • the data is successfully transmitted to the peer end, and the context information sent by the peer end is received, and the context information includes a process of controlling the character information by the ACK.
  • the process of performing data transmission by the UE and the unlicensed cell includes: an uplink data transmission process or a downlink data transmission process.
  • the interaction process between the UE and the unlicensed cell for performing an uplink data transmission includes:
  • the UE sends an uplink data block to an unlicensed cell.
  • the unlicensed cell sends context information to the UE.
  • the UE If the context information carries NACK information, the UE retransmits data to an unauthorized cell.
  • the uplink number is According to the transfer is completed.
  • the unlicensed cell regenerates the context information according to the retransmitted data. If the context information still carries the NACK control character information, steps 902 and 903 are repeated until the The context information carries the ACK information, and the uplink data transmission is completed, that is,
  • the unlicensed cell sends context information to the UE, where the context information carries ACK control character information.
  • the following process is not implemented: if the UE is within a preset time period after step 901 The UE does not receive the context information of the UE that is sent by the unlicensed cell through the authorized cell, and the UE retransmits, by using the authorized cell, the UE to the unlicensed cell in step 901. data.
  • the interaction process between the UE and the unlicensed cell for performing an uplink data transmission includes:
  • the unlicensed cell sends a downlink data block to the UE.
  • the UE sends context information to the unlicensed cell.
  • the unlicensed cell retransmits data to the UE.
  • the UE regenerates the context information according to the retransmitted data. If the context information still carries the NACK control character information, steps 906 and 907 are repeated until the context information Carrying ACK information, the downlink data transmission is completed, that is,
  • the UE sends context information to an unlicensed cell, where the context information carries ACK control character information.
  • the context information carries ACK control character information.
  • the following process is not implemented: if, after the step 905, the context information corresponding to the unlicensed cell sent by the UE through the authorized cell is not received within the preset time period And the unlicensed cell resends, by the authorized cell, the data sent by the unlicensed cell to the UE in step 905 to the UE by using the authorized cell.
  • the uplink data transmission process shown in steps 901-904 and the downlink data transmission process shown in steps 905-908 can be understood as two parallel processes, which are not performed after the uplink data transmission is performed.
  • the scheme of downlink data transmission Based on the foregoing description of FIG.
  • the spectrum resource of the unlicensed cell is occupied, and when the UE is in an unavailable state, the communication between the UE and the unlicensed cell may be In the following state: the first state, the UE sends a data block to the unlicensed cell, and when the context information corresponding to the UE sent by the unlicensed cell is not received, the unlicensed cell Spectrum resources are changed from available to unavailable;
  • the UE sends a data block to the unlicensed cell, and after receiving the context information corresponding to the UE sent by the unlicensed cell, the unlicensed cell spectrum resource is changed from unavailable to unavailable, where
  • the HARQ feedback information in the context information carries NACK control character information, where the NACK control character information indicates that the unlicensed base station successfully receives the data block sent by the UE, but the decoding fails;
  • the third state the The UE sends a data block to the unlicensed cell, and after receiving the context information corresponding to the UE sent by the unlicensed cell, the unlicensed cell spectrum resource is changed from unavailable to unavailable, wherein the context information is
  • the ACK control character information carries the ACK control character information, where the ACK control character information indicates that the unlicensed base station successfully receives the data block sent by the UE, and the decoding succeeds;
  • the fourth state the unlicensed cell direction The UE sends a data block, and when the context information corresponding to the unlicensed cell sent by the
  • the unlicensed cell spectrum resource is changed from unavailable to unavailable, and the HARQ feedback in the context information carries the ACK control character information, where
  • the ACK control character information indicates that the UE successfully receives the data block sent by the unlicensed cell, and the decoding is successful, and the unlicensed cell is not required to resend the data block.
  • the UE sends a data block to the unlicensed cell, but does not receive the context information corresponding to the UE sent by the unlicensed cell in a preset time; the eighth state, the The unlicensed cell sends the data block to the UE, but does not receive the context information corresponding to the unlicensed cell sent by the UE within a preset time.
  • the context information carries the ACK control character information.
  • the unlicensed spectrum resource is unavailable, the data transmission may be unsuccessful, resulting in The problem of wasting resources. specific,
  • the unlicensed cell fails to send the context information corresponding to the UE to the UE, the unlicensed cell spectrum resource recovery is available. Afterwards, the data is retransmitted to the unlicensed cell again, thereby causing waste of resources; correspondingly, if the unlicensed spectrum resource becomes unavailable in the fourth communication state, the UE cannot Authorizing the cell to send the context information corresponding to the unlicensed cell, and the unlicensed cell resends the data to the UE again after the unlicensed cell spectrum resource is restored, thereby causing waste of resources;
  • the UE cannot retransmit the data to the unlicensed cell in time, so that the data transmission is unsuccessful, causing the two to be Communication failure
  • the unlicensed cell is also unable to retransmit the data to the UE in time, so that the data transmission is unsuccessful, resulting in communication between the two. malfunction. If the unlicensed spectrum resource becomes unavailable in the seven communication states, the UE cannot retransmit the data to the unlicensed cell in time, causing communication failure between the two; if in the eighth communication state, The unlicensed spectrum resource becomes unavailable, and the unlicensed cell is also unable to retransmit the data to the UE in time, causing communication failure between the two.
  • the UE and the unlicensed cell can communicate through the authorized cell. Based on this, when the UE communicates with an unlicensed cell, it is required to determine whether the spectrum resource of the unlicensed cell is available. When the spectrum resources of the user equipment UE and the unlicensed cell are changed from available to unavailable, the U E may determine that the unlicensed cell spectrum resource is unavailable by:
  • the UE determines, by detecting, that the unlicensed cell spectrum resource is unavailable: the UE may monitor the wireless signal at a frequency point used by the unlicensed cell at the time-frequency position where the pilot is located, and perform decoding, if correctly If the decoding is not possible, the unlicensed cell is considered to be unavailable. If the unresolved cell is not available, the UE is considered to be unavailable. Therefore, the UE can detect whether the unlicensed cell spectrum resource is available by using the method.
  • the UE receives a message that the unlicensed cell spectrum resource is unavailable from the unlicensed cell to determine that the unlicensed cell spectrum resource is unavailable: when the unlicensed cell preempts the spectrum resource of an unlicensed cell, The time at which the preempted spectrum resource can be utilized by the unlicensed cell can be calculated, and therefore, the unlicensed cell can pass the unlicensed before the unlicensed cell spectrum resource is changed by the first L seconds that can become unavailable.
  • the cell spectrum resource sends a message to the UE that the unlicensed cell spectrum resource is about to be unavailable.
  • the L may be set according to an actual situation, which is not specifically limited in the embodiment of the present invention.
  • the UE determines that the unlicensed cell spectrum resource is unavailable by receiving the message that the unlicensed cell spectrum resource is unavailable, and the unlicensed cell is preempting the
  • the calculation of the usage time of the unlicensed spectrum resource after the unlicensed spectrum resource is a well-known technique of the person skilled in the art, and will not be described in detail in the embodiment of the present invention; Specifically, the determining, by the UE, that the spectrum resource of the unlicensed cell is unavailable may use the following technical solutions:
  • the first scheme the UE detects whether the spectrum resource of the unlicensed cell is unavailable; specifically, the UE monitors the time-frequency location where the pilot is located in the process of using the unlicensed cell spectrum resource The wireless signal, and decoding, is considered to be available if it can be decoded correctly; if it cannot be decoded, the unauthorised cell is considered unavailable.
  • the second solution the UE may receive a message that the unlicensed cell spectrum resource sent by the base station of the unlicensed cell is unavailable;
  • the unlicensed cell When the unlicensed cell is forced to occupy the unlicensed spectrum resource, the time for the unlicensed cell to use the unlicensed spectrum resource is obtained. Specifically, the unlicensed cell may notify the UE that the unlicensed spectrum resource is available for use in the time period; or the unlicensed cell may notify the UE of the unauthorized time within the time period. The deadline for the availability of spectrum resources.
  • the third scheme if the unlicensed cell and the authorized cell do not share the same base station, but the ideal backhaul link exists between the unlicensed cell and the authorized cell, the UE receives the authorized cell or the The message that the unlicensed cell spectrum resource is not available is sent by the base station of the unlicensed cell, where the message that the unlicensed cell spectrum resource that is sent by the authorized cell is unavailable is sent by the unlicensed cell.
  • the unlicensed cell sends a message that the unlicensed cell spectrum resource is unavailable to the authorized cell, where the authorized cell performs the unauthorized
  • a message that the cell spectrum resource is unavailable is sent to the UE.
  • the ideal backhaul link refers to the communication delay between the two base stations is 0.
  • the two base stations can be considered when the communication delay between the two base stations is less than P seconds.
  • the authorized cell may automatically retransmit the indication channel PHICH resource or the physical downlink shared channel resource PDSCH by using a physical downlink control channel PDCCH resource or a physical hybrid, or the unauthorized cell may perform the unauthorized by the MAC entity.
  • a message that the cell spectrum resource is unavailable is sent to the UE. For 802, the details are as follows:
  • the UE retransmits the And the data corresponding to the NACK information is sent to the unlicensed cell; or if the UE has sent data to the unlicensed cell, the UE receives, by using the authorized cell, the unlicensed cell, in the preset time period. Context information corresponding to the UE; or
  • the UE If the UE has sent the first data to the unlicensed cell, the context information corresponding to the UE sent by the unlicensed cell is not received within a preset time period, and the UE passes the authorized cell to the office. Said that the unlicensed cell retransmits the first data; or
  • the UE receives the second NACK information that is retransmitted by the unlicensed cell by the authorized cell. Data; or
  • the UE If the UE receives the data sent by the unlicensed cell, and does not send the context information corresponding to the unlicensed cell to the unlicensed cell, the UE will use the authorized cell to perform the The context information corresponding to the unlicensed cell is sent to the unlicensed cell; or
  • An embodiment of the present invention provides a data transmission method, the method includes: in a process of data transmission by a user equipment UE and the unlicensed cell, the user equipment UE determines that spectrum resources of an unlicensed cell are unavailable; And the unlicensed cell communicates with the authorized cell.
  • the UE and the unlicensed cell can communicate with each other through the authorized cell, thereby reducing the impact on the data transmission when the unlicensed cell spectrum resource is unavailable, and improving the data transmission rate. Improve spectrum utilization and reduce waste of resources.
  • the embodiment of the present invention further provides a method, which is a detailed description of the previous method embodiment, and includes: 1001.
  • the user equipment UE determines that the spectrum resource of the unlicensed cell is unavailable.
  • the UE If the UE receives the context information corresponding to the UE sent by the unlicensed cell, and the first NACK information carried in the context information corresponding to the UE, the UE retransmits the first The data corresponding to the NACK information is to an unauthorised cell. Specifically, the UE may retransmit the data corresponding to the first NACK information to the authorized by using the physical uplink shared channel resource (PUSCH) allocated by the authorized cell or the dedicated physical uplink control channel resource (PUCCH) allocated to the UE. a cell, to enable the authorized cell to send data corresponding to the first NACK information to an unlicensed cell.
  • PUSCH physical uplink shared channel resource
  • PUCCH dedicated physical uplink control channel resource
  • the UE If the UE receives the context information corresponding to the UE that is sent by the unlicensed cell, the first NACK information carried in the context information corresponding to the UE, at this time, the UE should be heavy to the unauthorized cell. Transmitting the data corresponding to the first NACK information, but if the UE fails to re-transmit the data corresponding to the first NACK information, the unlicensed cell spectrum resource becomes unavailable from available, the UE passes Retransmitting the data corresponding to the first NACK information to the authorized cell to the authorized cell, by using the physical uplink shared channel resource (PUSCH) allocated by the authorized cell or the dedicated physical uplink control channel resource (PUCCH) allocated to the UE And transmitting data corresponding to the first NACK information to an unauthorized cell.
  • PUSCH physical uplink shared channel resource
  • PUCCH dedicated physical uplink control channel resource
  • the physical uplink shared channel resource (PUSCH) allocated by the authorized cell is specifically: the first case: when the unlicensed cell spectrum resource is unavailable, the authorized cell sent by the authorized cell to the UE to the UE Reserved PUSCH. Specifically, if the unlicensed cell is co-located with the authorized cell, or the unlicensed cell and the authorized cell are not co-located, but the unrecognized cell has an ideal backhaul link with the authorized cell, so that After the unlicensed cell spectrum resource is unavailable, the unlicensed cell sends a message that the unlicensed cell spectrum resource is unavailable to the authorized cell, and the authorized cell reserves Q PUSCH resources for the UE, and the pre-reserved The reserved PUSCH resource is sent to the UE, where Q is greater than or equal to 1.
  • the second case the PUSCH resource randomly allocated by the authorized cell to the UE.
  • the authorized cell may randomly send a PUSCH resource to a user equipment in the authorized cell, and after the unlicensed cell spectrum resource is unavailable, the UE may use the PUSCH resource randomly allocated by the authorized cell to
  • the context information corresponding to the authorized cell is sent to the authorized cell, so that the authorized cell uses the context corresponding to the unlicensed cell.
  • Information is sent to the unauthorized cell.
  • the dedicated PUCCH resource is configured by the authorized cell for the UE, and the configuration time is not limited, and may be before the unlicensed cell spectrum resource is unavailable, or after the unlicensed cell spectrum resource is unavailable.
  • the authorized cell is configured to send the PUCCH resource to the UE, and then sends the PUCCH resource to the UE, and then the UE does not repeat the transmission, but the UE may reuse the PUCCH resource specifically configured by the authorized cell for the UE.
  • the authorized cell can be used to identify whether the data sent by the UE needs to be sent to the unlicensed cell, and the UE may further identify the data corresponding to the first NACK information that is resent to the unlicensed cell.
  • the identifier is used to indicate that the data block is sent to an unauthorized cell. For example, before the UE is to retransmit the data corresponding to the first NACK information to the unlicensed cell by using an authorized cell, the UE adds one data corresponding to the first NACK information to the MAC layer.
  • a special identifier such as a special logical channel number, indicates that the data is sent to an unlicensed cell, and then the identified data is sent to the base station of the authorized cell through a PUSCH resource or a PUCCH resource.
  • the UE may further add a special identifier to the data corresponding to the first NACK information retransmitted to the unlicensed cell, for example, a control cell in the existing data block is usually used.
  • the special field is used to identify the specific type of the control cell, but the special field has only one value. In the embodiment of the present invention, a new value may be added to the special field to identify that the data is sent to the unlicensed cell. .
  • the authorized cell after the authorized cell receives the data of the identifier sent by the UE, if the special identifier is detected, it may be determined that the data should be sent to the unlicensed cell, and the authorized cell sends the data retransmitted by the UE to the unauthorized. Community.
  • the specific identifier and the location of the special identifier are used in the retransmitted data, which is not limited by the embodiment of the present invention.
  • the UE receives the uplink information corresponding to the UE sent by the unlicensed cell by using the authorized cell, in a preset time period.
  • the UE receives the context information corresponding to the UE sent by the unlicensed cell by using an authorized cell to allocate a physical downlink shared channel resource PDSCH in a preset time period. Interest.
  • the context information corresponding to the UE specifically includes at least one of the following parameters: a hybrid automatic repeat request HARQ, a power headroom report PHR, a buffer status report BSR, a robust header compression ROHC, and a radio link control RLC status.
  • Report packet data convergence protocol
  • the HARQ feedback included in the context information has the following formats:
  • NACK controls character information. For example, in conjunction with FIG. 11a, if the UE receives a transport block in each of the subframes 5, 6, 7, and 8 of the downlink radio frame, the UE uses the subframe number of the downlink transport block as a key. Each subframe number corresponds to one ACK or NACK control character information.
  • the HARQ information includes a HARQ process number corresponding to the subframe number of each transport block and ACK or NACK control character information of each transport block.
  • the number of HARQ processes of the UE is related to the ratio of the TDD subframes, and the maximum is 13.
  • the base station When the base station sends the downlink data to the UE, the UE is notified to which HARQ process to receive data, and if the UE receives a transport block in each of the subframes 5, 6, 7, and 8 of the downlink radio frame, The base station sends the transport block to the UE, and the HARQ processes corresponding to the subframes 5, 6, 7, and 8 are 0, 1, 2, and 12, respectively, and the UE is based on the HARQ process ID of the received transport block.
  • the HARQ information includes a bit bitmap of a HARQ process number, the bit bitmap including a plurality of bits, each of the transport blocks
  • the value of the bit corresponding to the HARQ process number is used to indicate the ACK or NACK control character information of each transport block, and the value of the bit corresponding to the HARQ process number corresponding to the subframe in which no transport block is transmitted is null.
  • the UE does not send a HARQ process ID, but only transmits one bit bitmap.
  • the bit bitmap includes 13 bits, and each bit represents 1-12 and 13 HARQs in turn.
  • the process ID for example, when the HARQ process number is 0, 1, 2, and 12, respectively, a transport block is received, and the value of the bit corresponding to the HARQ process number of the transport block is used to indicate the ACK or NACK control of each transport block.
  • Character information the value of the bit corresponding to the other HARQ process number without a transport block is null;
  • the HARQ information includes a bit bitmap of a HARQ process number, where the bit bitmap includes a plurality of bits, and a value of a bit corresponding to a HARQ process number of each transport block is used to represent each transport block.
  • the ACK or NACK control character information the value of the bit corresponding to the HARQ process number corresponding to the subframe in which the transport block is not transmitted is used to represent the ACK control character information.
  • the UE does not send a HARQ process ID, but only transmits one bit bitmap, and the bit bitmap includes 13 bits, and each bit represents 1-12 and 13 HARQs in turn.
  • the process ID for example, when the HARQ process number is 0, 1, 2, and 12, respectively, a transport block is received, and the value of the bit corresponding to the HARQ process number of the transport block is used to indicate the ACK or NACK control of each transport block.
  • Character information the value of the bit corresponding to the HARQ process number of the other transport block is used to indicate the ACK control character information.
  • the ACK control character information represents that the data has been received and successfully decoded, there is no need to transmit data again, so the other
  • the value of the bit corresponding to the HARQ process number of the transport block is used to indicate the ACK control character information, and does not cause the base station to retransmit the data;
  • the HARQ information includes a bit bitmap of a HARQ process number, where two bits in the bit bitmap represent one HARQ process number, and the value of two bits corresponding to the HARQ process number of each transport block
  • the values of the two bits corresponding to the HARQ process number corresponding to the subframe in which the transport block transmission is not transmitted are used to represent the DTX control character information.
  • the UE does not send a HARQ process ID, but only transmits one bit bitmap, where the bit bitmap contains 26 bits, and each two bits represent a HARQ process number, 26 The bits represent a total of 13 HARQ process numbers in 1-12.
  • the HARQ process number is 0, 1, 2, and 12, respectively, a transport block is received, and the value of the bit corresponding to the HARQ process number of the transport block is received.
  • the value of the bit corresponding to the other HARQ process number without the transport block is used to represent DTX control character information, wherein the DTX control character information is used to indicate the process. The number did not receive the data.
  • the sending of the HARQ feedback information may be sent together with other information in the unlicensed cell context information.
  • the HARQ feedback information may also be transmitted by using a puncturing method, that is, the context information is other than the HARQ feedback information.
  • the HARQ information is placed by using a punching method.
  • the uplink resource of the UE Thus, for the receiver, it is equivalent to some loss of data, but still can be decoded.
  • the PHR is triggered, and after the UE determines that the unlicensed cell is unavailable, if the unlicensed cell is still in an active state,
  • the activation state means that the UE has a deactivation timer inside, and the timer does not time out, or the base station accessed by the UE does not send a message that the cell has been deactivated to the UE, then the UE
  • the PHR is sent to the authorized cell by using the received PUSCH resource or the PUCCH resource, and the PHR information is sent by the UE in the following three formats:
  • the UE sends the PHR information of all the activated cells, and at the same time, An identifier is added before the PHR of the unlicensed cell, the identifier is used to indicate that the cell is unavailable; the UE sends PHR information of all activated cells; and the UE sends PHR information of all available active cells.
  • the UE sends the first data to the unlicensed cell, the UE does not receive the context information corresponding to the UE sent by the unlicensed cell, and the UE passes the authorized cell. Retransmitting the first data to the unlicensed cell; specifically, the UE is configured by using a physical uplink shared channel resource (PUSCH) allocated by the authorized cell or a dedicated physical uplink control channel resource (PUCCH) allocated to the UE.
  • PUSCH physical uplink shared channel resource
  • PUCCH dedicated physical uplink control channel resource allocated to the UE.
  • the first data is retransmitted to the authorized cell, such that the authorized cell sends the first data to an unauthorized cell. If the UE has sent the first data to the unlicensed cell, the unlicensed cell spectrum resource is changed from unavailable to unavailable, and the UE does not receive the unsolicited cell transmission in the preset time period.
  • the context information corresponding to the UE where the UE is heavy by the physical uplink shared channel resource PUSCH allocated by the authorized cell or the dedicated physical uplink control channel resource PUCCH allocated to the UE And sending to the authorized cell, so that the authorized cell sends the first data to an unauthorized cell.
  • the PUSCH resource and the PUCCH resource after the unlicensed cell spectrum resource is unavailable, the authorized cell receives a message that the unlicensed cell spectrum resource sent by the unlicensed cell is unavailable, by the authorized cell.
  • Channel resources allocated for the UE Similarly, in order to authorize the cell, it is convenient to identify whether the data sent by the UE needs to be sent.
  • the UE may further identify the first data that is retransmitted to the unlicensed cell, where the identifier is used to indicate that the data block is sent to an unlicensed cell.
  • the manner in which the UE identifies the first data may refer to the manner in which the data corresponding to the first NACK information is identified in step 1002, which is not repeatedly described in this embodiment of the present invention.
  • the UE receives the second NACK that is retransmitted by the unlicensed cell by the authorized cell.
  • the data corresponding to the information If the context information corresponding to the unlicensed cell sent by the UE to the unlicensed cell carries the second NACK information, the UE receives the second NACK that is retransmitted by the unlicensed cell by the authorized cell. The data corresponding to the information.
  • the UE receives data corresponding to the second NACK information that is retransmitted by the unlicensed cell to the UE by using a MAC entity of the authorized cell.
  • the unlicensed cell spectrum resource is changed from unavailable to unavailable, and the UE passes the authorized cell.
  • the MAC entity receives data corresponding to the second NACK information that the unlicensed cell retransmits to the UE.
  • the unlicensed cell sends the data corresponding to the retransmitted second NACK information to the authorized cell
  • the authorized cell MAC entity sends the data corresponding to the second NACK information to the UE.
  • the unlicensed cell may further identify data corresponding to the second NACK information resent to the UE.
  • the identifier is used to indicate that the data block is sent to the UE.
  • the manner in which the unlicensed cell identifies the data corresponding to the second NACK information may refer to the manner in which the data corresponding to the second NACK information is identified in step 1002. Let me repeat.
  • the UE If the UE receives the data sent by the unlicensed cell, and does not send the context information corresponding to the unlicensed cell to the unlicensed cell, the UE passes the authorized cell within a preset time period.
  • the context information corresponding to the unlicensed cell is sent to the unlicensed cell.
  • the resource PUCCH sends the context information corresponding to the unlicensed cell to the authorized cell, so that the authorized cell sends the context information corresponding to the unlicensed cell of the data to the unlicensed cell.
  • the UE receives the data sent by the unlicensed cell, the context information corresponding to the unlicensed cell is not sent to the unlicensed cell, and at this time, the unlicensed cell spectrum resource becomes unavailable from available, then Sending, by the UE, the context information corresponding to the unlicensed cell by using the physical uplink shared channel resource PUS CH allocated by the authorized cell or the dedicated physical uplink control channel resource PUCCH allocated to the UE in a preset time period. And to the authorized cell, so that the authorized cell sends the context information corresponding to the unlicensed cell of the data to the unlicensed cell.
  • the UE sets priority information for the protocol data unit MAC PDU that includes the context information corresponding to the unlicensed cell, where the unlicensed cell corresponds.
  • the context information has a higher priority than the normal data, and is lower than the normal MAC control signaling, and the context information corresponding to the unlicensed cell is sent to the unlicensed cell through the authorized cell according to the priority information of the context information.
  • the unauthorised corresponding context information specifically includes at least one of the following parameters:
  • Hybrid automatic repeat request HARQ power headroom report PHR, buffer status report BSR, robust header compression ROHC, radio link control RLC status report, packet data aggregation protocol PDCP status report.
  • the format of the HARQ feedback information in the context information corresponding to the unlicensed cell may refer to the format of the HARQ feedback information in the UE corresponding context information in step 1003.
  • the context information is as follows: Case 1.
  • the UE passes the allocated first N PUSCH resources of the authorized cell or the first M dedicated PUCCH resources allocated to the UE in the second preset time period.
  • the context information corresponding to the unlicensed cell is sent to the authorized cell, so that the authorized cell sends the context information to the unlicensed cell, where N is greater than or equal to ⁇ , and ⁇ is greater than or equal to 1.
  • the unlicensed cell spectrum resource is not restored within the first preset time period, Sending, by the UE, context information corresponding to the unlicensed cell to the first N PUSCH resources sent by the base station of the authorized cell or the first M dedicated PUCCH resources allocated to the UE in the second preset time period The base station of the authorized cell.
  • the UE may send the context information corresponding to the unlicensed cell to the authorized cell as soon as possible, and the UE may send the unlicensed cell corresponding to the first available PUSCH resource or PUCCH resource in the second preset time period.
  • Context information if the first available PUSCH resource or PUCCH resource is insufficient to send the context information all, part of the data in the context information may be sent by using the first available PUSCH resource or PUCCH resource, and other The data may be sent through the second available PUSCH resource or the PUCCH resource in the second preset time period until all the context information is sent.
  • Case 2 If the UE receives the PUSCH resources sent by the J authorized cells in the same subframe, where J > 1, the UE determines that the transmission capacity of the J PUSCH resources is not less than the context of the unlicensed cell.
  • the UE receives the PUSCH resources sent by the multiple authorized cells in the same subframe of the second preset time period, for example, if the UE determines that the unlicensed cell spectrum resource is unavailable in one subframe, Four PUSCH resources are received, numbered as PUSCH1, PUSCH2, PUSCH3, and PUSCH4.
  • the four PUSCH resources are arranged in order from the smallest to the largest according to the index numbers of the authorized cells that transmit the four PUSCH resources, which are PUSCH2, PUSCH3, PUSCH4, and PUSCH1.
  • the UE selects which PUSCH resource to send the context information corresponding to the unlicensed cell, and the existing two schemes: the UE selects the PUSCH resource sent by the authorized cell with the smallest index number to send the context information corresponding to the unlicensed cell, For example, in PUSCH1-PUSCH4, the PUSCH resource sent by the authorized cell with the smallest index number is PUSCH2, and the UE sends the context information corresponding to the unlicensed cell through PUSCH2.
  • the UE abandons the PUSCH2, and selects the PUSCH resource that is sent by the authorized cell ranked second in the authorized cell index number, which is PUSCH3 here. If the PUSCH3 cannot send the context corresponding to the unlicensed cell once, the UE finally determines the available PUSCH resources according to the foregoing method.
  • the UE selects the PUSCH resource sent by the authorized cell with the smallest index number to send the context information corresponding to the unlicensed cell, and if the PUSCH resource cannot send the context information corresponding to the unlicensed cell at one time, the UE A part of the data is sent through the PUSCH resource, and the remaining data is sent by the index number in the order of being small to large, and the PUSCH resources allocated by the second-ranked authorized cell are transmitted, according to this method, until all the data is transmitted.
  • the UE For the distance, the UE first transmits the context information by using the PUSCH resource allocated by the authorized cell with the smallest index number, that is, PUSCH2, and if the capacity of the PUSCH2 is insufficient to completely send the context information once, the UE passes the PUSCH2. A part of the data is transmitted, and the remaining data is transmitted through PUSCH3. According to this method, all the context information is transmitted.
  • the UE If the UE has received the second data sent by the unlicensed cell, the context information corresponding to the unlicensed cell is not successfully sent to the unlicensed cell in a preset time period, and the UE passes the The authorized cell receives the second data that is retransmitted by the unlicensed cell. Specifically, the UE receives the second data that is retransmitted by the unlicensed cell by using a MAC entity of the authorized cell.
  • the unlicensed cell may also retransmit the first to the UE.
  • the two data are identified, and the identifier is used to indicate that the data block is sent to the UE.
  • the manner in which the unlicensed cell identifies the second data may refer to the manner in which the second data is identified in step 1002, which is not repeatedly described in this embodiment of the present invention.
  • the present invention can enable the UE and the unlicensed cell to communicate with each other through the authorized cell when the spectrum resource of the unlicensed cell is unavailable, thereby reducing the impact on the data transmission when the unlicensed cell spectrum resource is unavailable.
  • the embodiment of the present invention further provides a data transmission method, which is combined with the figure. 12. The method is a detailed description of the foregoing method embodiments, including:
  • the user equipment determines that the spectrum resource of the unlicensed cell is unavailable.
  • step 1201 For the detailed process of the step 1201, refer to the step 1001 in the foregoing embodiment, which is not repeatedly described in the embodiment of the present invention.
  • the UE determines whether the spectrum resource of the unlicensed cell is available for use in the first preset time period.
  • the UE After the UE determines that the unlicensed cell spectrum resource is unavailable, if the unlicensed cell spectrum resource is available for recovery in the first preset time period, the UE and the unlicensed cell may continue to pass.
  • the unlicensed cell spectrum resource is used for communication, for example, the UE sends the context information corresponding to the unlicensed cell to the unlicensed cell, or the UE receives the context information corresponding to the UE sent by the unlicensed cell.
  • the unlicensed spectrum resource is not restored and available in the first preset time period, if the UE and the unlicensed cell are in two states: the UE has sent data to the unlicensed cell, The context information corresponding to the UE sent by the unlicensed cell has not been received; or the UE receives the data sent by the unlicensed cell, and has not sent the unlicensed cell corresponding to the unlicensed cell. Contextual information; At this time, the UE cannot communicate with the unlicensed cell, that is, the UE cannot receive the context information corresponding to the UE that is sent by the unlicensed cell, or the UE cannot send the undiscovered to the unlicensed cell.
  • the UE and the unlicensed cell communicate through the spectrum resource of the unlicensed cell, so that the In the case of data transmission between the UE and the unlicensed cell, further resources are saved.
  • the UE receives the UE corresponding to the unlicensed cell sent by the authorized cell in the second preset time period.
  • Context information if the UE receives the data sent by the unlicensed cell, the UE sends the context information corresponding to the unlicensed cell to the unauthorized by the authorized cell in a second preset time period.
  • the second preset time period is entered. If the spectrum resources of the unlicensed cell are not restored, the UE and the unauthorized cell cannot communicate with each other. In the following two states,
  • the UE has sent data to the unlicensed cell, and has not received the context information corresponding to the UE sent by the unlicensed cell; or the UE receives the data sent by the unlicensed cell,
  • the unlicensed cell sends context information corresponding to the unlicensed cell.
  • the unauthorized small The area spectrum resource is changed from available to unavailable.
  • the unlicensed cell spectrum resource is not restored, the data transmission between the UE and the unlicensed cell is not affected.
  • the UE is still unable to receive the context information corresponding to the UE sent by the unlicensed cell, the unlicensed cell has received the data sent by the UE and successfully decoded.
  • the UE may retransmit the data to the unlicensed cell, or the UE does not retransmit data at the MAC layer, but retransmits data at a higher layer, resulting in waste of resources. Therefore, in the second preset time period, the UE and the unlicensed cell communicate through the authorized cell in a preset second time period. For example, if the UE receives the data sent by the unlicensed cell, the context information corresponding to the unlicensed cell has not been sent to the unlicensed cell, and the unlicensed cell spectrum resource is configured by The available becomes unavailable.
  • the unlicensed cell communicates with the authorized cell in a preset second time period.
  • the sum of the first preset time period and the second preset time period is a time when the UE or the unlicensed cell waits for context information after transmitting data.
  • the first preset time period and the second preset time period may be preset according to actual conditions, which is not limited by the embodiment of the present invention.
  • a timer and a time window may be preset in the UE, where the duration of the timer and the time window respectively correspond to the first preset time period and the second preset time period, when the UE determines the location After the unlicensed cell spectrum resource is unavailable, the timer is started, and after the timer is started, it is detected whether the unlicensed cell spectrum resource is available.
  • the unlicensed cell may communicate by using the spectrum resource of the unlicensed cell; if the unlicensed cell spectrum resource is not restored and available during the timer duration, the UE starts a time window, after the time window is opened, The UE communicates with the unlicensed cell by using an authorized cell, that is, the UE receives the PUSCH resource or the PUCCH resource allocated by the authorized cell, and passes the PUSCH resource or the PUCCH.
  • the resource sends the context information corresponding to the unlicensed cell to the unlicensed cell by using the authorized cell, or receives the context information corresponding to the UE sent by the unlicensed cell by using the authorized cell.
  • the present invention can enable the UE and the unlicensed cell to communicate with each other through the authorized cell when the spectrum resource of the unlicensed cell is unavailable, thereby reducing the impact on the data transmission when the unlicensed cell spectrum resource is unavailable, and improving the data transmission rate. Improve spectrum utilization and reduce waste of resources.
  • An embodiment of the present invention provides a data transmission method, where the execution entity of the method is an unlicensed cell base station, and the base station provides services to an unlicensed cell.
  • the method includes: 1301: The first base station determines an unlicensed cell. The spectrum resource is not available, and the unlicensed cell is served by the first base station.
  • the first base station may calculate the time that the unlicensed spectrum resource is used by the first base station when preempting an unlicensed spectrum resource, and therefore, the first base station may be according to the first base station.
  • the time of the unlicensed spectrum resource is used to determine whether the unlicensed cell spectrum resource is available.
  • the first base station communicates with a user equipment UE by using an authorized cell and the unlicensed cell, where the authorized cell is served by a second base station or the first base station.
  • the context information corresponding to the unlicensed cell carries the second NACK information, where the first base station passes the Transmitting, by the second base station, data corresponding to the second NACK information to the UE;
  • the first base station receives the context information corresponding to the unlicensed cell sent by the UE by using the second base station in a preset time period;
  • the first base station If the first base station has sent the second data to the UE, the context information corresponding to the unlicensed cell sent by the UE is not received within a preset time period, and the first base station passes the second Transmitting, by the base station, the second data to the UE; a first NACK information, the first base station receiving data corresponding to the first NACK information retransmitted by the UE by the second base station;
  • the first base station If the first base station receives the data sent by the UE, the first base station sends the context information corresponding to the UE to the first base station by using the second base station in a preset time period;
  • the second base station receives the first data that is retransmitted by the UE in a preset time period. If the unlicensed cell receives the context information corresponding to the unlicensed cell sent by the UE, the context information corresponding to the unlicensed cell carries the second NACK information, where the unlicensed cell is heavy through the authorized cell. Transmitting the data corresponding to the second NACK information to the UE.
  • the method for data transmission provided by the present invention, the method steps of the unlicensed cell and the UE are peer-to-peer, and its technical features
  • the method steps of the unlicensed cell and the UE are peer-to-peer, and its technical features
  • An embodiment of the present invention provides a data transmission method, where the method includes: determining, by a first base station, that a spectrum resource of an unlicensed cell is unavailable, where the unlicensed cell is served by the first base station; The authorized cell and the unlicensed cell communicate with the user equipment UE, and the authorized cell is served by the second base station or the first base station. Based on the method, when the spectrum resources of the unlicensed cell are unavailable, the UE and the unlicensed cell can communicate with each other through the authorized cell, thereby reducing the impact on the data transmission when the unlicensed cell spectrum resource is unavailable, improving the data transmission rate, and improving Spectrum utilization, reducing waste of resources.
  • the embodiment of the present invention further provides a data transmission method, which is combined with FIG. 14, which is a detailed description of the previous embodiment, and includes:
  • the first base station determines that spectrum resources of the unlicensed cell are unavailable, and the unauthorized cell is served by the first base station.
  • step 1401 For the detailed process of the step 1401, refer to the description of the step 1301 of the foregoing embodiment, which is not described in detail in the embodiment of the present invention.
  • the first base station receives the sending by the UE by using the unlicensed cell
  • the context information corresponding to the unlicensed cell carries the second NACK information
  • the first base station retransmits the data corresponding to the second NACK information by using the authorized cell to the UE.
  • the first base station may send data corresponding to the second NACK information retransmitted to the UE to the second base station, where the second base station sends the second NACK information by using a MAC entity. Corresponding data is sent to the UE.
  • the second base station may further identify that the data sent by the first base station is sent to the UE, where the first base station may further identify data corresponding to the second NACK information that is resent to the UE.
  • the identifier is used to indicate that the data is sent to the UE. For a specific identifier process, refer to the description of the identifier of the data, which is not described in detail in this embodiment of the present invention.
  • the first base station sends data to the UE by using the unlicensed cell
  • the first base station receives, by using the unlicensed cell, the UE, by using the authorized cell, within a preset time period. Context information corresponding to the unlicensed cell.
  • the first base station does not authorize the cell to receive the physical uplink shared channel resource PUSCH or the dedicated physical uplink control channel resource PUCCH allocated by the UE to the second base station of the authorized cell.
  • the sent context information of the unlicensed cell sent by the UE The UE sends the context information corresponding to the unlicensed cell to the second base station of the authorized cell by using the physical uplink shared channel resource (PUSCH) or the dedicated physical uplink control channel resource (PUCCH) allocated by the granting cell to the authorized cell.
  • the second base station of the cell sends the context information corresponding to the unlicensed cell to the unlicensed cell of the first base station.
  • the UE may set priority information for the protocol data unit that includes the context information corresponding to the unlicensed cell, and the specific setting method may refer to the UE about
  • the description of the setting of the priority is not limited in this embodiment of the present invention.
  • the unlicensed cell context information specifically includes at least one of the following parameters:
  • Hybrid automatic repeat request HARQ feedback power headroom report PHR, buffer status report BSR, robust header compression ROHC, radio link control RLC status report, packet data aggregation protocol PDCP status report.
  • the first base station sends the second data to the UE by using the unlicensed cell
  • the context information corresponding to the unlicensed cell sent by the UE is not received within a preset time period, where The first base station retransmits the second data to the UE by using the authorized cell.
  • the first base station waits to receive the context information corresponding to the unlicensed cell sent by the UE in a preset time period, but if the first base station does not receive the not sent by the UE within the preset time period, Authorizing the context information corresponding to the cell, the first base station retransmits the second data to the second base station, and sends, by the MAC entity of the second base station, the second data to the UE.
  • the second base station may further identify that the data sent by the unlicensed cell is sent to the UE, where the first base station may further identify, by using the second data that is retransmitted to the UE, where the identifier is
  • the specific identification process may refer to the description of the identifier of the data by the UE, which is not repeatedly described in the embodiment of the present invention.
  • the first base station If the first base station carries the first NACK information in the context information corresponding to the UE sent by the unlicensed cell to the UE, the first base station receives the UE to retransmit through the authorized cell. The data corresponding to the first NACK information.
  • the first base station receives data corresponding to the first NACK information that is retransmitted by the UE by using the PUSCH resource or the PUCCH resource allocated by the second base station.
  • the specific process is: the UE sends the data corresponding to the first NACK information to the second base station by using the PUSCH resource or the PUCCH resource allocated by the second base station, where the second base station sends the first NACK
  • the data corresponding to the information is sent to the first base station.
  • the second base station may be configured to identify that the data sent by the UE is sent to the first base station, where the UE may further identify, by using, the first data that is retransmitted to the first base station, where the identifier is For indicating the data to be sent to the first base station, the specific identification process may refer to the description of the identifier of the data, which is not described in detail in the embodiment of the present invention. 1406. If the first base station receives the data sent by the UE by using the unlicensed cell, the first base station sends, by using the authorized cell, context information corresponding to the UE to the Said UE.
  • the first base station receives the data sent by the UE, the context information corresponding to the UE is not sent to the UE, and the unlicensed cell spectrum resource is changed from unavailable to unavailable.
  • the first base station sends the context information corresponding to the UE to the UE by using a physical downlink shared channel resource PDSCH allocated by the second base station in a preset time period.
  • the first base station sends the context information corresponding to the UE to the UE by using a first PDSCH resource that is received within a preset time period, if the first PDSCH resource is less than one time, the first The context information corresponding to the UE is sent to the UE, where the first base station compares part of the data in the context information corresponding to the UE to the UE by using the first PDSCH resource received in the preset time period.
  • the Context information is sent to the UE, and the remaining data is sent to the UE by using the second PDSCH resource received in the preset time period until all the context information corresponding to the UE is sent to the UE.
  • the first base station may set priority information of the protocol data unit that includes the context information corresponding to the UE, and the priority of the context information corresponding to the UE
  • the common context data is lower than the normal MAC control signaling, and the context information corresponding to the UE is sent to the first base station through the authorized cell according to the priority information of the context information corresponding to the UE.
  • the first base station has received the first data sent by the UE by using the unlicensed cell, the context information corresponding to the UE is not successfully sent to the UE in a preset time period, where the first base station Receiving, by the authorized cell, the first data that is retransmitted by the UE. Specifically, the UE sends the retransmitted first data to the second base station by using the PUSCH resource or the PUCCH resource allocated by the second base station, and the second base station sends the first data to the unlicensed cell.
  • the UE may identify, by using, the first data that is retransmitted to the first base station, where the identifier is used to indicate The first data is sent to the first base station.
  • the process for the UE to identify the first data may refer to the description of the identifier of the data by the UE, which is not repeatedly described in this embodiment of the present invention.
  • An embodiment of the present invention provides a data transmission method. According to the method, when a spectrum resource of an unlicensed cell is unavailable, the UE and the unlicensed cell base station can communicate with each other through the authorized cell base station, thereby reducing the spectrum of the unlicensed cell. Impact on data transmission when resources are unavailable, increase data transmission rate, improve spectrum utilization, and reduce resource waste.
  • the embodiment of the present invention further provides a method for data transmission.
  • the method is a specific description of the foregoing method embodiments, including:
  • the first base station determines that spectrum resources of the unlicensed cell are unavailable, and the unauthorized cell is served by the first base station.
  • the first base station determines whether the spectrum resource of the unlicensed cell is restored and available, and if the recovery is available, the first base station passes the unlicensed cell spectrum resource and the UE in the first preset time period. Communicate.
  • the first base station receives the context information corresponding to the unlicensed cell sent by the UE by using the authorized cell, the first base station is in the second preset time period.
  • the context information corresponding to the UE is sent to the first base station by using the authorized cell in a preset time period.
  • An embodiment of the present invention provides a data transmission method. According to the method, when a spectrum resource of an unlicensed cell is unavailable, the UE and the unlicensed cell base station can communicate with each other through the authorized cell base station, thereby reducing the spectrum of the unlicensed cell. Impact on data transmission when resources are unavailable, increase data transmission rate, improve spectrum utilization, and reduce resource waste.
  • the UE and the unlicensed cell communicate with each other through the authorized cell, and further, the UE, the authorized cell, and the An interaction process of the authorized cell, and a method for data transmission provided by the present invention is described in detail. Referring to FIG. 16, the method includes:
  • the user equipment UE and the unlicensed cell determine that the unlicensed cell spectrum resource is unavailable.
  • the UE If the UE receives the context information corresponding to the UE sent by the unlicensed cell, the The context information carries the first NACK information, and the UE determines to retransmit the data corresponding to the first NACK information.
  • the UE sends data corresponding to the first NACK information to the authorized cell.
  • the authorized cell sends data corresponding to the first NACK information to the unlicensed cell.
  • the unlicensed cell determines that the UE sends the context information corresponding to the UE.
  • the unlicensed cell sends context information corresponding to the UE to the authorized cell.
  • the authorized cell sends context information corresponding to the UE to the UE.
  • the UE If the UE has sent the first data to the unlicensed cell, the UE does not receive the context information corresponding to the UE sent by the unlicensed cell, and the UE determines that the weight is heavy. Send the first data.
  • the UE sends the first data to the authorized cell.
  • the authorized cell sends the first data to the unlicensed cell.
  • the unlicensed cell receives the context information corresponding to the unlicensed cell sent by the UE, the context information corresponding to the unlicensed cell carries the second NACK information, and the unlicensed cell determines the retransmission.
  • the data corresponding to the two NACK information If the unlicensed cell receives the context information corresponding to the unlicensed cell sent by the UE, the context information corresponding to the unlicensed cell carries the second NACK information, and the unlicensed cell determines the retransmission. The data corresponding to the two NACK information.
  • the unlicensed cell sends data corresponding to the second NACK information to the authorized cell
  • the authorized cell sends data corresponding to the second NACK information to the
  • the UE determines to send context information corresponding to the unlicensed cell.
  • the UE sends context information corresponding to the unlicensed cell to the authorized cell.
  • the authorized cell sends context information corresponding to the unlicensed cell to the unlicensed cell.
  • the unlicensed cell has sent the second data to the UE, at a preset time.
  • the context information corresponding to the unlicensed cell sent by the UE is not received in the segment, and the unlicensed cell determines to resend the second data,
  • the unlicensed cell sends the second data to the authorized cell.
  • An embodiment of the present invention provides a data transmission method. According to the method, when a spectrum resource of an unlicensed cell is unavailable, the UE and the unlicensed cell base station can communicate with each other through the authorized cell base station, thereby reducing the spectrum of the unlicensed cell. Impact on data transmission when resources are unavailable, increase data transmission rate, improve spectrum utilization, and reduce resource waste.
  • the embodiment of the present invention provides a UE, which is characterized by, in conjunction with FIG. 17, a transceiver 1702, a processor 1701, a memory 1703, and a communication bus 1704, wherein the communication bus 1704 is used to implement the transceiver 1702, the processor 1701, and Connection communication between the memories 1703.
  • the communication bus 1704 may be an Industry Standard Architecture (ISA) bus, a Peripheral Component (PCI) bus, or an Extended Industry Standard Architecture (abbreviated as an Industry Standard Architecture). EISA) bus and so on.
  • ISA Industry Standard Architecture
  • PCI Peripheral Component
  • EISA Extended Industry Standard Architecture
  • the bus 1704 can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 17, but it does not mean that there is only one bus or one type of bus.
  • Memory 1703 is for storing executable program code, the program code including computer operating instructions.
  • the memory 1703 may include a high speed RAM memory and may also include a non-volatile memory such as at least one disk memory.
  • the processor 1701 may be a central processing unit (CPU), or an application specific integrated circuit (ASIC), or one or more configured to implement the embodiments of the present invention. integrated circuit.
  • the processor 1701 is configured to execute executable program code stored in the memory 1703, such as a computer program, to execute a program corresponding to the executable code.
  • the processor 1701 is configured to determine that a spectrum resource of an unlicensed cell is unavailable.
  • the transceiver 1702 is configured to perform communication by using an authorized cell and the unlicensed cell. Specifically, the transceiver 1702 is specifically configured to: if the UE receives the context information corresponding to the UE that is sent by the unlicensed cell, the first NACK information carried in the context information corresponding to the UE, Authorizing the cell to retransmit the data corresponding to the first NACK information to the unlicensed cell; or
  • the UE has sent data to the unlicensed cell, receiving context information corresponding to the UE sent by the unlicensed cell by using the authorized cell, in a preset time period; or if the UE has been The unlicensed cell sends the first data, does not receive the context information corresponding to the UE sent by the unlicensed cell, and retransmits the first data to the unlicensed cell by using the authorized cell. ; or
  • the context information corresponding to the unlicensed cell that is sent by the UE to the unlicensed cell carries the second NACK information, and receives the second NACK information that is sent by the unlicensed cell by using the authorized cell.
  • the UE receives the data sent by the unlicensed cell, sending the context information corresponding to the unlicensed cell to the unlicensed cell by using the authorized cell within a preset time period;
  • the UE If the UE has received the second data sent by the unlicensed cell, the context information corresponding to the unlicensed cell is not successfully sent to the unlicensed cell within a preset time period, and the authorized cell receives the The second data of the unauthorised cell retransmission.
  • the processor 1701 is further configured to:
  • the transceiver is specifically used to:
  • the transceiver is also used to: Communicating with the unlicensed cell by using spectrum resources of the unlicensed cell.
  • the processor 1701 is further configured to: in the preset time period, the unlicensed cell is corresponding to the authorized cell by using the authorized cell Setting the priority information of the context information corresponding to the unlicensed cell before sending the context information to the unlicensed cell;
  • the transceiver 1702 is specifically configured to: send, according to the priority information of the context information, context information corresponding to the unlicensed cell to the authorized cell, in a preset time period, so that the authorized cell
  • the context information corresponding to the unlicensed cell is sent to the unlicensed cell.
  • the transceiver 1702 is specifically configured to:
  • PUSCH physical uplink shared channel resource
  • PUCCH dedicated physical uplink control channel resource
  • the transceiver 1702 is specifically configured to:
  • the transceiver 1702 is specifically configured to:
  • the processor 1701 is further configured to: The data corresponding to the NACK information is used to identify that the data corresponding to the first NACK information is sent to the unlicensed cell by using the authorized cell;
  • the transceiver 1702 is specifically configured to: send, by using the PUSCH resource that is allocated by the authorized cell, or the PUCCH resource that is allocated to the UE, data that is corresponding to the first NACK information to the authorized cell, so that The second base station authorizes the cell to send data corresponding to the first NACK information to the unlicensed cell;
  • the identifier unit is configured to: And the identifier is used to indicate that the first data is sent to the unlicensed cell, before the re-sending the first data to the unlicensed cell by the authorized cell.
  • the transceiver 1702 is specifically configured to: send, by using the PUSCH resource allocated by the authorized cell or the PUCCH resource allocated to the UE, the first data after the identifier to the Authorizing the cell, such that the authorized cell sends the first data to the unlicensed cell.
  • the PUSCH resource reserved by the authorized cell to the UE When the spectrum resource of the unlicensed cell is unavailable, the PUSCH resource reserved by the authorized cell to the UE; or
  • the PUSCH resource dynamically allocated by the authorized cell to the UE.
  • the processor 1701 is specifically configured to:
  • the determining unit receives a message that the unlicensed cell spectrum resource sent by the unlicensed cell is unavailable; or
  • the context information specifically includes at least one of the following parameters: a hybrid automatic repeat request, a HARQ feedback, a power headroom report, a PHR, and a buffer status report.
  • the HARQ feedback specifically includes:
  • bit bitmap of the HARQ process number, where the bit bitmap includes a plurality of bits, and the value of the bit corresponding to the HARQ process number of each transport block is used to indicate ACK or NACK control character information of each transport block, and no transmission
  • the value of the bit corresponding to the HARQ process number corresponding to the subframe transmitted by the block is null; or
  • bit bitmap of the HARQ process number, where the bit bitmap includes a plurality of bits, and the value of the bit corresponding to the HARQ process number of each transport block is used to indicate ACK or NACK control character information of each transport block, and no transmission Corresponding to the HARQ process number corresponding to the subframe transmitted by the block The value of the bit is used to indicate the ACK control character information; or
  • a bit bitmap of the HARQ process number where two bits in the bit bitmap represent one HARQ process number, and the value of two bits corresponding to the HARQ process number of each transport block is used to indicate an ACK of each transport block or
  • the NACK controls the character information, and the values of the two bits corresponding to the HARQ process number corresponding to the subframe in which the transport block is not transmitted are used to represent the D TX control character information.
  • the embodiment of the present invention provides a UE, based on the UE, that when the spectrum resource of the unlicensed cell is unavailable, the UE and the unlicensed cell base station can communicate with each other through the authorized cell base station, thereby reducing the spectrum resource of the unlicensed cell. Impact on data transmission when not available, increase data transmission rate, improve spectrum utilization, and reduce resource waste.
  • the embodiment of the present invention provides a base station, including a transceiver 1802, a processor 1801, a memory 1803, and a communication bus 1804.
  • the communication bus 1804 is used to implement a transceiver 1802, between the processor 1801 and the memory 1803. Connection communication.
  • the communication bus 1804 may be an Industry Standard Architecture (ISA) bus, a Peripheral Component (PCI) bus, or an Extended Industry Standard Architecture (abbreviated as an Extended Industry Standard Architecture). EISA) bus and so on.
  • ISA Industry Standard Architecture
  • PCI Peripheral Component
  • EISA Extended Industry Standard Architecture
  • the bus 1804 can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 18, but it does not mean that there is only one bus or one type of bus.
  • Memory 1803 is for storing executable program code, the program code including computer operating instructions.
  • Memory 1803 may include high speed RAM memory and may also include non-volatile memory, such as at least one disk memory.
  • the processor 1801 may be a central processing unit (CPU), or an application specific integrated circuit (ASIC), or one or more configured to implement the embodiments of the present invention. integrated circuit.
  • CPU central processing unit
  • ASIC application specific integrated circuit
  • the processor 1801 is configured to execute executable program code stored in the memory 1803. For example, a computer program runs a program corresponding to the executable code. Specifically, the processor 1801 is configured to determine that a spectrum resource of an unlicensed cell is unavailable, where the unlicensed cell is served by the base station, and the transceiver 1802 is configured to use the unlicensed cell and the authorized cell. And communicating with the user equipment UE, where the authorized cell is set with the unlicensed cell in the same station or across stations.
  • the transceiver 1802 is specifically configured to:
  • the transceiver 1802 receives the context information corresponding to the unlicensed cell sent by the UE, the context information corresponding to the unlicensed cell carries the second NACK information, and the second cell is retransmitted by the authorized cell. Data corresponding to the NACK information to the UE;
  • the transceiver 1802 has sent data to the UE, receiving context information corresponding to the unlicensed cell sent by the UE through the authorized cell, in a preset time period; if the transceiver 1802 has been The UE sends the second data, and does not receive the context information corresponding to the unlicensed cell sent by the UE in the preset time period, and retransmits the second data to the UE by using the authorized cell;
  • the first NACK information is carried in the context information corresponding to the UE that is sent by the transceiver to the UE, the data corresponding to the first NACK information that is retransmitted by the UE through the authorized cell is received;
  • the transceiver 1802 receives the data sent by the UE, the context information corresponding to the UE is sent to the UE through the authorized cell in a preset time period;
  • the transceiver 1802 If the transceiver 1802 has received the first data sent by the UE, receiving the first data that is retransmitted by the UE in a preset time zone.
  • the processor 1801 is further configured to:
  • the transceiver 1802 is specifically configured to:
  • the transceiver 1802 is also used to:
  • the processor 1801 is further configured to identify data corresponding to the second NACK information, The identifier is used to indicate that data corresponding to the second NACK information is sent to the UE by using the authorized cell;
  • the transceiver 1802 is specifically configured to: send data corresponding to the identified second NACK information to the authorized cell, so that the authorized cell sends data corresponding to the second NACK information according to the identifier. To the UE;
  • the identifier unit is configured to: identify the second data, where the identifier is used to indicate that the second data is sent to the UE;
  • the transceiver 1802 is configured to send the second data to the authorized cell, so that the authorized cell sends the second data to the UE according to the identifier.
  • the embodiment of the present invention provides a base station, based on the base station, that when the spectrum resource of the unlicensed cell is unavailable, the UE and the base station can communicate with each other through the authorized cell base station, thereby reducing the spectrum resource of the unlicensed cell.
  • a person skilled in the art can understand that all or part of the steps of implementing the above method embodiments may be completed by using hardware related to program instructions, and the foregoing program may be stored in a computer readable storage medium, and the program is executed when executed.
  • the foregoing steps include the steps of the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

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

Abstract

Conformément à un mode de réalisation, la présente invention concerne un procédé, un équipement utilisateur (UE) et une station de base pour une transmission de données. Le procédé comprend les opérations suivantes : un équipement utilisateur (UE) détermine que des ressources de spectre d'une cellule non autorisée ne sont pas disponibles; l'UE communique avec la cellule non autorisée au moyen d'une cellule autorisée. Sur la base du mode de réalisation de la présente invention, l'UE et la cellule non autorisée peuvent communiquer l'un avec l'autre au moyen de la cellule autorisée lorsque les ressources de spectre de la cellule non autorisée ne sont pas disponibles, permettant ainsi de réduire l'impact sur la transmission de données lorsque les ressources de spectre de la cellule non autorisé ne sont pas disponibles, d'augmenter une vitesse de transmission de données, d'améliorer l'utilisation de spectre et de réduire le gaspillage de ressources.
PCT/CN2014/070616 2014-01-14 2014-01-14 Procédé, équipement utilisateur (ue) et station de base pour une transmission de données Ceased WO2015106393A1 (fr)

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CN201480001031.7A CN105191384B (zh) 2014-01-14 2014-01-14 一种数据传输的方法、ue和基站

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