WO2014117391A1 - Procédé de transmission de données, station de base, et équipement d'utilisateur - Google Patents

Procédé de transmission de données, station de base, et équipement d'utilisateur Download PDF

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Publication number
WO2014117391A1
WO2014117391A1 PCT/CN2013/071277 CN2013071277W WO2014117391A1 WO 2014117391 A1 WO2014117391 A1 WO 2014117391A1 CN 2013071277 W CN2013071277 W CN 2013071277W WO 2014117391 A1 WO2014117391 A1 WO 2014117391A1
Authority
WO
WIPO (PCT)
Prior art keywords
base station
data
user equipment
feedback information
harq
Prior art date
Application number
PCT/CN2013/071277
Other languages
English (en)
Chinese (zh)
Inventor
张健
曾清海
Original Assignee
华为技术有限公司
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 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201380001962.2A priority Critical patent/CN104321997B/zh
Priority to PCT/CN2013/071277 priority patent/WO2014117391A1/fr
Publication of WO2014117391A1 publication Critical patent/WO2014117391A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/1887—Scheduling and prioritising arrangements

Definitions

  • Embodiments of the present invention relate to the field of communications technologies, and, more particularly, to a method, a base station, and a user equipment for transmitting data. Background technique
  • the base station providing the primary serving cell and the base station providing the secondary serving cell may not be able to simultaneously provide the physical uplink control channel (Physical Uplink Control Channel, PUCCH). ).
  • PUCCH Physical Uplink Control Channel
  • the user equipment cannot simultaneously send the hybrid automatic repeat request in the PUCCH of the primary serving cell and the PUCCH of the secondary serving cell (Hybrid Automatic Repeat Request) , HARQ) Feedback
  • the base station cannot perform effectively when performing inter-base station carrier aggregation.
  • the present invention provides a method for transmitting data, a base station, and a user equipment, so that the base station can effectively perform HARQ operation when performing inter-base station carrier aggregation.
  • the present invention provides a method for transmitting data, which is performed by a first base station providing a secondary serving cell or a second base station providing a primary serving cell, where the first base station and the second base station perform carrier aggregation between base stations. , including:
  • determining whether to perform HARQ retransmission on the first data according to the scheduling policy includes:
  • the method further includes:
  • Determining at least two buffers for the first downlink HARQ process, where the first downlink HARQ process corresponds to the first data, where the sending the first data to the user equipment on the physical downlink shared channel PDSCH includes: using the The first buffer of the at least two buffers sends the first data to the user equipment on the PDSCH, where, according to the first HARQ feedback information sent by the user equipment, determining whether to perform HARQ retransmission on the first data, The method includes: performing HARQ retransmission or sending of the first data by using the first buffer according to the first HARQ feedback information, when receiving the first HARQ feedback information sent by the user equipment by using the second base station New data,
  • the method also includes:
  • the at least two buffers are used.
  • the second buffer sends new data.
  • the method when determining whether to perform HARQ retransmission according to the first HARQ feedback information sent by the user equipment, on the physical downlink shared channel PDSCH Before the user equipment sends the first data, the method further includes:
  • a handover indication Sending, to the user equipment, a handover indication, where the handover indication is used to indicate that the user equipment sends the HARQ feedback information corresponding to the data sent by the first base station or the uplink resource transmission corresponding to the second base station by using the uplink resource of the first base station HARQ feedback information of data transmitted by the second base station.
  • the method before the first data is sent to the user equipment on the physical downlink shared channel PDSCH, the method further includes:
  • the retransmission indication is used to indicate that the user equipment does not need to send the first HARQ feedback information, where the first HARQ feedback information corresponds to the first data.
  • the method when determining whether to perform HARQ retransmission according to the first HARQ feedback information sent by the user equipment, the physical downlink shared channel PDSCH Before the first data is sent to the user equipment, the method further includes: The cell configuration information is sent to the user equipment, where the cell configuration information is used to indicate that the user equipment sends the first HARQ feedback information by using a PUCCH of the secondary serving cell.
  • the method further includes:
  • HARQ retransmission including:
  • the HARQ retransmission is performed on the first data using the same resource and modulation and coding scheme as transmitting the new data.
  • the present invention provides a method for transmitting data, including:
  • the base station is a first base station providing a secondary serving cell or a second base station providing a primary serving cell, and the first base station and the second base station perform carrier aggregation between the base stations.
  • the method before receiving the first data sent by the base station on the physical downlink shared channel PDSCH, the method further includes:
  • the base station Receiving a retransmission indication sent by the base station, where the retransmission indication is used to indicate that the user equipment does not need to send the first HARQ feedback information, where the first HARQ feedback information corresponds to the first data.
  • the method further includes:
  • a channel quality indication CQI is sent to the base station, so that the base station determines whether to perform HARQ retransmission according to the CQI.
  • the method before receiving the redundancy version of the first data that the base station performs the hybrid automatic repeat request HARQ retransmission, or receiving the new data sent by the base station, the method also includes:
  • the base station Determining whether the first data is successfully received. If the base station has available uplink resources, the first HARQ feedback information is sent to the base station by using the available uplink resource, where the first HARQ feedback information corresponds to the first data.
  • the base is received Before the first data sent by the physical downlink shared channel PDSCH, the method further includes: receiving cell configuration information sent by the base station, where the cell configuration information is used to indicate that the user equipment sends the first HARQ by using a PUCCH of the secondary serving cell Feedback.
  • the method further includes:
  • the PUCCH of the base station transmits HARQ feedback information corresponding to data transmitted by the base station.
  • the method further includes:
  • the first buffer in the at least two buffers storing the first data, where the first downlink HARQ process corresponds to the first data; Successfully receiving the first data; transmitting the first HARQ feedback information to the second base station, so that the second base station forwards the first HARQ feedback information to the base station, where the first HARQ feedback information corresponds to the first data; Receiving a redundancy version of the first data that is sent by the base station for HARQ retransmission, processing a redundancy version of the first data in the first buffer, and receiving new data sent by the base station, in the first buffer Or processing the new data in a second buffer of the at least two buffers.
  • the method before the receiving, by the base station, the first data that is sent by the base station to the shared channel PDSCH, the method further includes:
  • the handover indication is used to indicate that the user equipment sends the HARQ feedback information corresponding to the data sent by the first base station or the uplink resource transmission corresponding to the second base station by using the uplink resource of the first base station.
  • the HARQ feedback information of the data sent by the second base station is sent by using the uplink resource of the first base station, or the uplink resource is sent by using the second base station.
  • the second base station Corresponding to HARQ feedback information of data transmitted by the second base station.
  • the present invention provides a base station, where the base station is a first base station that provides a secondary serving cell, or the base station is a second base station that provides a primary serving cell, and includes: And a sending unit, configured to send the first data to the user equipment on the physical downlink shared channel PDSCH; and the control unit is configured to determine, according to the scheduling policy, whether to perform hybrid automatic repeat request HARQ retransmission on the first data.
  • the base station further includes: a receiving unit, configured to receive a channel quality indicator CQI, an error rate of a radio link control RLC protocol data unit PDU, or a number sent by the user equipment a HARQ feedback information, where the first HARQ feedback information corresponds to the first data; the control unit is specifically configured to determine whether to perform hybrid automatic weight according to the CQI, an error rate of the RLC PDU, or the first HARQ feedback information. Request a HARQ retransmission.
  • a receiving unit configured to receive a channel quality indicator CQI, an error rate of a radio link control RLC protocol data unit PDU, or a number sent by the user equipment a HARQ feedback information, where the first HARQ feedback information corresponds to the first data
  • the control unit is specifically configured to determine whether to perform hybrid automatic weight according to the CQI, an error rate of the RLC PDU, or the first HARQ feedback information. Request a HARQ retransmission.
  • control unit is specifically configured to perform HARQ retransmission; or the control unit is specifically configured to perform HARQ retransmission.
  • the control unit is further configured to determine, for the first downlink HARQ process. At least two buffers, where the first downlink HARQ process corresponds to the first data; the sending unit is configured to send, by using the first buffer in the at least two buffers, the user equipment on the PDSCH The first data; the receiving unit is configured to receive the first HARQ feedback information sent by the user equipment by using the second base station; the control unit is further configured to determine, according to the first HARQ feedback information, use the first buffer The area performs HARQ retransmission or sends new data; the control unit is further configured to expire at one or more loopback times RTT after the sending unit sends the first data, and the receiving unit does not receive the second base station to send In the case of the first HARQ feedback information, determining to use the second buffer in the at least two buffers to send new data; the sending unit is further used for A first buffer data of
  • the sending unit is further configured to send a handover indication to the user equipment.
  • the sending unit is further configured to send a retransmission indication to the user equipment.
  • the sending unit is further configured to send cell configuration information to the user equipment.
  • the sending unit specifically uses The new data is sent to the user equipment, and the HARQ retransmission is performed in the next subframe in which the new data is transmitted.
  • the sending unit is specifically configured to perform the HARQ retransmission using the same resource and modulation and coding manner as the new data is sent.
  • the present invention provides a user equipment, including:
  • a first receiving unit configured to receive first data that is sent by the base station on the physical downlink shared channel PDSCH; and a second receiving unit, configured to receive, by the base station, the redundancy of the first data that is performed by the hybrid automatic repeat request HARQ retransmission according to the scheduling policy a remaining version, or receiving new data sent by the base station according to a scheduling policy, where the base station is a first base station providing a secondary serving cell or a second base station providing a primary serving cell, and the first base station and the second base station perform inter-base station carrier polymerization.
  • the user equipment further includes: a third receiving unit, configured to receive a retransmission indication sent by the base station.
  • the user equipment further includes: a sending unit, configured to send a channel quality indicator CQI to the base station.
  • the user equipment further includes: a control unit, configured to determine whether the first data is successfully received, and a sending unit, configured to send the first HARQ feedback information to the base station, The first HARQ feedback information corresponds to the first data.
  • the user equipment further includes: a fourth receiving unit, configured to receive cell configuration information sent by the base station.
  • the sending unit is specifically configured to receive, at the first receiving unit, the base station In the case of the first data sent by the PDSCH, the first HARQ feedback information is sent by using the PUCCH of the base station; the first receiving unit is further configured to receive data sent by the second base station; and the sending unit is further configured to If the first receiving unit receives the data sent by the second base station, the first receiving unit switches to send the second HARQ feedback information by using the PUCCH of the second base station, where the second HARQ feedback information corresponds to the data sent by the second base station.
  • the sending unit is further configured to: after the second HARQ feedback information is sent by the PUCCH of the second base station, switch back to use the PUCCH of the base station to send HARQ feedback information corresponding to the data sent by the base station.
  • the user equipment further includes: a control unit, configured to determine, for the first downlink HARQ process At least two buffers, the first buffer in the at least two buffers stores the first data, where the first downlink HARQ process corresponds to the first data; the control unit is further configured to determine whether the first data is successful Receiving the first data; the sending unit, configured to send the first HARQ feedback information to the second base station, where the first HARQ feedback information corresponds to the first data; the control unit is further configured to be in the first buffer Processing a redundancy version of the first data received by the second receiving unit; the control unit is further configured to process the first buffer in the first buffer or in a second buffer in the at least two buffers The new data received by the receiving unit.
  • a control unit configured to determine, for the first downlink HARQ process At least two buffers, the first buffer in the at least two buffers stores the first data, where the first downlink HARQ process corresponds to the first data
  • the control unit is further configured to determine whether the first data is successful
  • the user equipment further includes: a fifth receiving unit, configured to receive a handover indication sent by the base station, and a sending unit, configured to use the first according to the handover indication
  • the uplink resource of the base station sends the HARQ feedback information corresponding to the data sent by the first base station or the HARQ feedback information corresponding to the data sent by the second base station by using the uplink resource of the second base station.
  • the present invention provides a base station, where the base station is a first base station that provides a secondary serving cell, or the base station is a second base station that provides a primary serving cell, and includes:
  • a transmitter configured to send first data to the user equipment on the physical downlink shared channel PDSCH, and configured to: determine, according to the scheduling policy, whether to perform a hybrid automatic repeat request for the first data
  • the base station further includes: a receiver, configured to receive a channel quality indicator CQI, an error rate of a radio link control RLC protocol data unit PDU, or a number sent by the user equipment a HARQ feedback information, where the first HARQ feedback information corresponds to the first data; the processor is specifically configured to determine whether to perform hybrid automatic weight according to the CQI, the error rate of the RLC PDU, or the first HARQ feedback information. Request a HARQ retransmission.
  • a receiver configured to receive a channel quality indicator CQI, an error rate of a radio link control RLC protocol data unit PDU, or a number sent by the user equipment a HARQ feedback information, where the first HARQ feedback information corresponds to the first data
  • the processor is specifically configured to determine whether to perform hybrid automatic weight according to the CQI, the error rate of the RLC PDU, or the first HARQ feedback information. Request a HARQ retransmission.
  • the processor is specifically configured to perform HARQ retransmission always; or the processor is specifically configured to perform HARQ retransmission.
  • the processor is further configured to determine, for the first downlink HARQ process. At least two buffers, where the first downlink HARQ process corresponds to the first data; the transmitter is specifically configured to send, by using the first buffer in the at least two buffers, the user equipment on the PDSCH The first data; the receiver is specifically configured to receive first HARQ feedback information sent by the user equipment by using the second base station; the processor is further configured to use, according to the first HARQ Feedback information, determining to use the first buffer for HARQ retransmission or sending new data; the processor is further configured to expire at the one or more loopback times RTT after the transmitter sends the first data, and the receiving If the first HARQ feedback information sent by the second base station is not received, determining to use the second buffer in the at least two buffers to send new data; the transmitter is further configured to use the first buffer The zone transmits a redundant version of
  • the transmitter is further configured to send a handover indication to the user equipment.
  • the transmitter is further configured to send a retransmission indication to the user equipment.
  • the transmitter is further configured to send cell configuration information to the user equipment.
  • the transmitter in a seventh possible implementation manner, in a case that the processor determines to perform the HARQ retransmission, the transmitter is specifically configured to send to the user equipment.
  • the new data is subjected to the HARQ retransmission in the next subframe in which the new data is transmitted.
  • the transmitter is specifically configured to perform the HARQ retransmission using the same resource and modulation and coding manner as sending the new data.
  • the present invention provides a user equipment, including:
  • a receiver configured to receive first data that is sent by the base station on the physical downlink shared channel (PDSCH), and a processor that is configured to process the first data.
  • the receiver is further configured to receive, by the base station, a hybrid automatic repeat request (HARQ) according to the scheduling policy. Redistributing a redundant version of the first data, or receiving new data sent by the base station according to a scheduling policy; the processor is further configured to process a redundant version of the first data or process the new data, where the base station is Providing a first base station of the secondary serving cell or a second base station providing the primary serving cell, where the first base station and the second base station perform carrier aggregation between the base stations.
  • HARQ hybrid automatic repeat request
  • the receiver is further configured to receive a retransmission indication sent by the base station.
  • the user equipment further includes: a transmitter, configured to send a channel quality indicator CQI to the base station.
  • the processor is further configured to determine whether the first data is successfully received.
  • the user equipment further includes: a transmitter, configured to send the first A HARQ feedback information, wherein the first HARQ feedback information corresponds to the first data.
  • the receiver is further configured to receive cell configuration information sent by the base station.
  • the transmitter is specifically configured to receive, at the receiver, the base station sends the PDSCH
  • the first HARQ feedback information is sent by using the PUCCH of the base station; the receiver is further configured to receive data sent by the second base station; the transmitter is further configured to receive at the receiver.
  • the processor is further configured to determine, by the first downlink HARQ process, at least two buffers, where The first buffer of the at least two buffers stores the first data, where the first downlink HARQ process corresponds to the first data; the processor is further configured to determine whether the first data is successfully received; the user
  • the device further includes: a transmitter, configured to send first HARQ feedback information to the second base station, where the first HARQ feedback information corresponds to the first data; the processor is further configured to process in the first buffer a redundancy version of the first data received by the second receiver; the processor, further configured to process the second receive in the first buffer or in a second buffer of the at least two buffers The new data received by the device.
  • the receiver is further configured to receive a handover indication sent by the base station, where the user equipment further includes: a transmitter, configured to use the first according to the handover indication
  • the uplink resource of the base station sends the HARQ feedback information corresponding to the data sent by the first base station or the HARQ feedback information corresponding to the data sent by the second base station by using the uplink resource of the second base station.
  • the base station can determine whether to perform HARQ retransmission according to the scheduling policy. This solves the problem that the user equipment cannot simultaneously transmit HARQ feedback information on the PUCCH of the first base station and the PUCCH of the second base station, so that the base station can perform HARQ operations effectively when performing inter-base station carrier aggregation.
  • the present invention provides a method for transmitting data, which provides an inter-base station carrier
  • the first base station of the aggregated secondary serving cell or the second base station of the primary serving cell that provides carrier aggregation between the base stations includes:
  • the first data is data including a downlink medium access control MAC layer control element CE; receiving the hybrid automatic repeat request HARQ feedback sent by the user equipment
  • the new data is sent to the user equipment, where the HARQ feedback information is carried by the uplink MAC CE sent by the user equipment on the physical uplink shared channel PUSCH; if the HARQ feedback information sent by the user equipment is not received, And performing HARQ retransmission on the first data.
  • the method further includes:
  • the base station receives the first data sent by the first base station before transmitting the first data to the user equipment on the physical downlink shared channel PDSCH; and receiving the HARQ feedback information sent by the user equipment, to the first The base station transmits the HARQ feedback information.
  • the method further includes:
  • the timing is started. If the timing reaches the preset threshold and the HARQ feedback information sent by the user equipment is not received, the HARQ retransmission is performed on the first data. .
  • performing the HARQ retransmission includes:
  • the present invention provides a method for transmitting data, including:
  • the base station receives, by the base station, first data that is sent by the physical downlink shared channel PDSCH, where the first data is data that includes a downlink medium access control MAC layer control element CE; in a case where it is determined that the first data is successfully received and decoded, The base station sends an uplink MAC CE that carries the HARQ feedback information of the hybrid automatic repeat request, and receives data for performing HARQ retransmission sent by the base station, where the data for performing the HARQ retransmission is a redundancy version of the first data or includes the downlink MAC address.
  • the hybrid automatic repeat request HARQ feedback information is sent to the base station, including: determining to successfully receive and decode
  • the uplink MAC CE is determined, and the uplink MAC CE carries the HARQ positive acknowledgment information; and the uplink MAC CE is sent to the base station.
  • the present invention provides a base station, where the base station is a first base station that provides a secondary serving cell, or the base station is a second base station that provides a primary serving cell, and includes:
  • a sending unit configured to send the first data to the user equipment on the physical downlink shared channel PDSCH, where the first data is data that includes a downlink medium access control MAC layer control element CE, and the receiving unit is configured to receive, send, by the user equipment The hybrid automatic repeat request HARQ feedback information, where the HARQ feedback information is carried by the uplink MAC CE sent by the user equipment on the physical uplink shared channel PUSCH; and the control unit is configured to: when the receiving unit does not receive the HARQ feedback information Determining, performing a HARQ retransmission on the first data; the control unit is further configured to: when the receiving unit receives the HARQ feedback information, determine to send new data to the user equipment; the sending unit is further used to Send the new data to the user equipment or send data for HARQ retransmission.
  • the receiving unit is further configured to receive the first data sent by the first base station; And is further configured to send the HARQ feedback information to the first base station.
  • control unit is further configured to start timing when the sending unit completes sending the first data to the user equipment
  • the control unit is specifically configured to perform HARQ retransmission on the first data if the timing reaches a preset threshold and the HARQ feedback information sent by the user equipment is not received.
  • the sending unit is specifically configured to send a redundancy version of the first data to the user equipment; or the control unit, It is further configured to determine second data that includes the downlink MAC CE.
  • the sending unit is specifically configured to send the second data to the user equipment.
  • the present invention provides a user equipment, including:
  • a receiving unit configured to receive first data that is sent by the base station on the physical downlink shared channel PDSCH, where the first data is data that includes a downlink medium access control MAC layer control element CE, and a control unit is configured to determine whether the data is successfully received and decoded.
  • the first data a sending unit, configured to the base The station sends an uplink MAC CE carrying the hybrid automatic repeat request HARQ feedback information; the receiving unit is further configured to receive data for performing HARQ retransmission sent by the base station, where the data for performing HARQ retransmission is redundancy of the first data
  • the version includes the second data of the downlink MAC CE, or receives the new data sent by the base station, where the base station is a first base station providing a secondary serving cell or a second base station providing a primary serving cell, the first base station and the first base station
  • the two base stations perform carrier aggregation between the base stations.
  • control unit is specifically configured to determine, in the case of determining that the first data is successfully received and decoded, the uplink MAC CE, where the uplink MAC CE carries a HARQ positive acknowledgement information.
  • the present invention provides a base station, where the base station is a first base station that provides a secondary serving cell, or the base station is a second base station that provides a primary serving cell, and includes:
  • a transmitter configured to send the first data to the user equipment on the physical downlink shared channel PDSCH, where the first data is data that includes a downlink medium access control MAC layer control element CE, and the receiver is configured to receive the user equipment to send The hybrid automatic repeat request HARQ feedback information, where the HARQ feedback information is carried by the uplink MAC CE sent by the user equipment on the physical uplink shared channel PUSCH; and the processor is configured to: when the receiver does not receive the HARQ feedback information Determining, performing HARQ retransmission on the first data; the processor is further configured to: when the receiver receives the HARQ feedback information, determine to send new data to the user equipment; the transmitter is further used to Send the new data to the user equipment or send data for HARQ retransmission.
  • the receiver is further configured to receive the first data sent by the first base station; And sending the HARQ feedback information to the first base station.
  • the processor is further configured to start, when the transmitter completes sending the first data to the user equipment
  • the processor is configured to perform HARQ retransmission on the first data if the timing reaches a preset threshold and the HARQ feedback information sent by the user equipment is not received.
  • the transmitter is specifically configured to send a redundant version of the first data to the user equipment; or
  • the processor is further configured to determine second data that includes the downlink MAC CE, where the transmitter is specifically configured to send the second data to the user equipment.
  • the present invention provides a user equipment, including:
  • a receiver configured to receive first data that is sent by the base station on the physical downlink shared channel PDSCH, where the first data is data that includes a downlink medium access control MAC layer control element CE, and a processor is configured to determine whether to successfully receive and decode The first data;
  • the transmitter is configured to send, to the base station, an uplink MAC CE that carries the hybrid automatic repeat request HARQ feedback information;
  • the receiver is further configured to receive data for performing HARQ retransmission sent by the base station, where the HARQ is performed.
  • the retransmitted data is a redundancy version of the first data or second data including the downlink MAC CE, or receives new data sent by the base station, where the base station is a first base station providing a secondary serving cell or providing a primary serving cell
  • the second base station, the first base station and the second base station perform carrier aggregation between the base stations.
  • the processor is specifically configured to determine, in the case of determining that the first data is successfully received and decoded, the uplink MAC CE, where the uplink MAC CE carries a HARQ affirmative Confirmation information; the transmitter is further configured to send the uplink MAC CE to the base station.
  • the base station can rely on the RLC ARQ mechanism to ensure the reliability of data transmission without performing HARQ retransmission or the number of HARQ retransmissions is small and the data transmission fails.
  • the ARQ mechanism of the RLC layer is only applicable to downlink data from the RLC layer or the upper protocol layer, and is not applicable to the MAC CE generated only at the MAC layer.
  • the present invention introduces a MAC layer feedback mechanism, and controls the retransmission of the downlink MAC CE by the uplink MAC CE carrying the HARQ feedback information, thereby improving the reliability of the MAC CE transmission.
  • FIG. 1 is a schematic flowchart of a method of transmitting data according to an embodiment of the present invention.
  • FIG. 2 is a schematic flow chart of a method of transmitting data according to an embodiment of the present invention.
  • FIG. 3 is a schematic flowchart of a method of transmitting data according to an embodiment of the present invention.
  • FIG. 4 is a schematic flow chart of a method of transmitting data according to an embodiment of the present invention.
  • FIG. 5 is a schematic flowchart of a method of transmitting data according to an embodiment of the present invention.
  • FIG. 6 is a schematic flowchart of a method of transmitting data according to an embodiment of the present invention.
  • FIG. 7 is a schematic flowchart of a method of transmitting data according to an embodiment of the present invention.
  • FIG. 8 is a schematic flowchart of a method of transmitting data according to an embodiment of the present invention.
  • FIG. 9a is a schematic flowchart of a method of transmitting data according to an embodiment of the present invention.
  • Figure 9b is a schematic diagram of the static load format of the uplink MAC CE.
  • FIG. 10 is a schematic structural diagram of a base station according to an embodiment of the present invention.
  • FIG. 11 is a schematic structural diagram of a base station according to an embodiment of the present invention.
  • FIG. 12 is a schematic structural diagram of a user equipment according to an embodiment of the present invention.
  • FIG. 13 is a schematic structural diagram of a user equipment according to an embodiment of the present invention.
  • FIG. 14 is a schematic structural diagram of a base station according to an embodiment of the present invention.
  • FIG. 15 is a schematic structural diagram of a user equipment according to an embodiment of the present invention. detailed description
  • GSM Global System of Mobile communication
  • CDMA code division multiple access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • FDD Frequency Division
  • TDD Time Division Duplex
  • UPD Universal Mobile Telecommunication system System
  • the UE may also be referred to as a mobile terminal (MT), a mobile user equipment, etc., and may communicate with one or more core networks via a radio access network (eg, Radio Access Network, RAN), and the user equipment may be mobile.
  • a terminal such as a mobile phone (or "cellular" phone) and a computer with a mobile terminal, for example, can be portable, pocket, handheld, computer Built-in or in-vehicle mobile device.
  • the base station may be a Base Transceiver Station (BTS) in GSM or CDMA, or may be a base station (NodeB) in WCDMA, or may be an eNB or an e-NodeB in LTE, and the present invention is not limited thereto.
  • BTS Base Transceiver Station
  • NodeB base station
  • eNB eNodeB
  • LTE Long Term Evolution
  • FIG. 1 is a schematic flowchart of a method of transmitting data according to an embodiment of the present invention.
  • the method of Figure 1 is performed by a base station, which may be a first base station providing a secondary serving cell, and the base station may also be a second base station providing a primary serving cell.
  • the first base station and the second base station perform carrier aggregation between the base stations, and the first base station and the second base station may simultaneously provide a Physical Uplink Control Channel (PUCCH), or the first base station and the second base station may not provide the PUCCH at the same time.
  • PUCCH Physical Uplink Control Channel
  • PDSCH Physical Downlink Shared Channel
  • 102 Determine, according to the scheduling policy, whether to perform a Hybrid Automatic Repeat Request (HARQ) retransmission on the first data.
  • HARQ Hybrid Automatic Repeat Request
  • the base station can determine whether to perform HARQ retransmission according to the scheduling policy. This solves the problem that the user equipment cannot simultaneously transmit HARQ feedback information on the PUCCH of the first base station and the PUCCH of the second base station, so that the base station can perform HARQ operations effectively when performing inter-base station carrier aggregation.
  • FIG. 2 is a schematic flow chart of a method of transmitting data according to an embodiment of the present invention.
  • the method of Figure 2 is performed by a base station, which may be a first base station providing a secondary serving cell, and the base station may also be a second base station providing a primary serving cell.
  • the first base station and the second base station perform carrier aggregation between the base stations, and the first base station and the second base station may simultaneously provide the PUCCH, or the first base station and the second base station may not provide the PUCCH at the same time.
  • the retransmission indication is sent to the user equipment, where the retransmission indication is used to indicate that the user equipment does not need to send the HARQ feedback information corresponding to the first data, where the first data is sent by the base station to the user equipment on the PDSCH,
  • the HARQ feedback information includes a positive acknowledgment (Acknowledgment, ACK) and a negative acknowledgment (NACK). .
  • the retransmission indication may be indicated to the user equipment by means of radio resource control (RRC) signaling, and the retransmission indication may also be through medium access control (MAC) The way the Control Element (CE) indicates the user device.
  • RRC radio resource control
  • MAC medium access control
  • the cell configuration information is used to indicate that the user equipment sends the first HARQ feedback information by using the PUCCH of the secondary serving cell, where the handover indication is used to indicate that the user equipment sends the HARQ corresponding to the data sent by the first base station by using the PUCCH of the first base station.
  • the feedback information or the HARQ feedback information corresponding to the data transmitted by the second base station is transmitted using the PUCCH of the second base station.
  • the handover indication may be indicated by the MAC CE to the user equipment, or may be indicated to the user equipment by means of RRC signaling.
  • step 201 and step 202 are optional steps. Step 201 or step 202 can be performed.
  • the physical downlink control channel is configured to allocate a downlink resource and a specified HARQ process ID (HARQ process id) to the user equipment.
  • HARQ process id HARQ process ID
  • the scheduling policy may be that the base station specifies that the data is always HARQ retransmitted, and the number of times the HARQ retransmission is performed is specified. When the number of HARQ retransmissions reaches the preset number of times, new data is started to be transmitted. In this way, after transmitting the first data, the base station may perform HARQ retransmission on the first data without using the HARQ feedback information corresponding to the first data fed back by the user equipment.
  • the scheduling policy may be that the base station specifies that HARQ retransmission is never performed. In this case, the base station always sends new data. In this way, after transmitting the first data, the base station may not need to determine whether to send new data according to the first data HARQ feedback information fed back by the user equipment.
  • the scheduling policy may be: the base station may receive a channel quality indicator (CQI) sent by the user equipment, and determine, according to the CQI, whether to perform HARQ retransmission, for example, the CQI is high.
  • the new data is transmitted at or equal to the preset value, and if the CQI is lower than the preset value, the HARQ retransmission is performed.
  • the base station may perform HARQ retransmission on the first data without the HARQ feedback information corresponding to the first data fed back by the user equipment.
  • the scheduling policy may be: the base station receives an error rate of a RLC protocol data unit (PDU), and determines whether to perform a HARQ retransmission according to an error rate of the RLC PDU, for example, When the error rate is higher than or equal to the preset value, Perform HARQ retransmission and send new data if the error rate is lower than the preset value. In this way, after transmitting the first data, the base station may perform HARQ retransmission on the first data without using the HARQ feedback information corresponding to the first data fed back by the user equipment.
  • PDU RLC protocol data unit
  • the base station does not perform HARQ retransmission or the number of HARQ retransmissions is small, the data transmission fails, if the physical layer transmission fails, the radio link control (RLC) can be automatically relied on.
  • RLC radio link control
  • ARQ Automatic Retransmission Request
  • the scheduling policy may be: the base station receives the first HARQ feedback information corresponding to the first data, performs HARQ retransmission on the first data according to the first HARQ feedback information, or sends new data. .
  • the base station can directly receive the first HARQ feedback information sent by the user equipment.
  • the base station may further receive the first HARQ feedback information sent by the user equipment by using the second base station.
  • the base station sends new data to the user equipment, and performs HARQ retransmission in the next subframe after the new data is sent.
  • the base station can perform HARQ retransmission using the same resource and coded modulation as transmitting the new data.
  • the base station may determine at least two buffers for each downlink HARQ process before transmitting data to the user equipment. Specifically, when determining the at least two buffers, the base station determines that different buffers have corresponding numbers, and the base station may determine, according to the number, a buffer for sending data and a buffer for processing HARQ feedback information corresponding to the data; or The base station can also transmit data using different buffers in turn and use the buffer to process HARQ feedback information corresponding to the data. The base station can transmit data using one of the at least two buffers and another data using another buffer.
  • the base station may receive the HARQ feedback information sent by the user equipment by using the second base station, and determine whether to perform HARQ retransmission according to the HARQ feedback information. Specifically, when receiving the HARQ feedback information, the base station may further receive one or more of a HARQ process ID, HARQ time information, and buffer index information corresponding to the HARQ feedback information, and according to the HARQ process ID, HARQ. One or more of time information and buffer index information, determining a buffer used, the base station may retransmit the data corresponding to the HARQ feedback information according to the HARQ feedback information in the buffer, or in the buffer Send new data to the user device.
  • the base station expires one or more HARQ Round Trip Time (RTT) after transmitting data in one of the at least two buffers, and does not receive the user equipment through the second base.
  • RTT Round Trip Time
  • new data is transmitted using another buffer of the at least two buffers.
  • the base station may determine at least two buffers for the first downlink HARQ process where the first data is located before sending the first data to the user equipment.
  • the base station can transmit the first data to the user equipment using the first one of the at least two buffers.
  • the base station receives the first HARQ feedback information sent by the user equipment by using the second base station.
  • the base station may further receive one or more of the following: the first HARQ process ID, the first HARQ time information, and the first buffer index information, where the first HARQ process ID, the first HARQ time information, and the first A buffer index information corresponds to the first HARQ feedback information.
  • the base station performs HARQ retransmission or new data on the first data by using the first buffer in the at least two buffers according to the first HARQ feedback information. Specifically, the base station determines, according to the first HARQ feedback information, whether to perform HARQ retransmission on the first data. The base station determines, according to the first HARQ process ID, the first HARQ time information, or the first buffer index information, a first buffer for processing the first HARQ feedback in the at least two buffers. In addition, the base station uses the second buffer in the at least two buffers when one or more HARQ RTTs after the first data is transmitted expires and the base station does not receive the first HARQ feedback sent by the second base station.
  • the base station sends the first data in the first buffer of the at least two buffers, and the second buffer in the at least two buffers sends new data, where different buffers of the same HARQ process have Corresponding numbers or use different buffers in a certain order.
  • the base station receives the first HARQ feedback forwarded by the second base station, and the base station determines to perform HARQ retransmission on the first data or send new data according to the first HARQ feedback (for example, the second data).
  • the base station After receiving a HARQ RTT or a longer time, the base station receives the HARQ feedback corresponding to the second data forwarded by the second base station, determines, according to the HARQ feedback, performs HARQ retransmission on the second data, or sends new data. (eg third data).
  • the base station can determine whether to perform HARQ retransmission according to the scheduling policy. This solves the problem that the user equipment cannot simultaneously transmit HARQ feedback information on the PUCCH of the first base station and the PUCCH of the second base station, so that the base station can perform HARQ operations effectively when performing inter-base station carrier aggregation.
  • FIG. 3 is a schematic flowchart of a method of transmitting data according to an embodiment of the present invention. The method of Figure 3 is performed by the user equipment.
  • the scheduling policy described above is the same as the scheduling policy of the embodiment of FIG. 1, and need not be described here.
  • the base station may be a first base station that provides a secondary serving cell, and the base station may also be a second base station that provides a primary serving cell.
  • the first base station and the second base station perform carrier aggregation between the base stations, and the first base station and the second base station can simultaneously provide the PUCCH, or the first base station and the second base station do not simultaneously provide the PUCCH.
  • the user equipment when receiving the data sent by the base station, the user equipment does not need to send the HARQ feedback to the base station, and can receive the redundancy version of the data that the base station performs HARQ retransmission, or the receiving base station. New data sent.
  • the problem that the user equipment cannot simultaneously transmit the HARQ feedback information on the PUCCH of the first base station and the PUCCH of the second base station can be solved, so that the base station can perform the HARQ operation effectively when performing inter-base station carrier aggregation.
  • FIG. 4 is a schematic flow chart of a method of transmitting data according to an embodiment of the present invention. The method of Figure 4 is performed by the user equipment.
  • the base station referred to in the method shown in FIG. 4 may be a first base station providing a secondary serving cell, or a second base station providing a primary serving cell, where the first base station Performing inter-base station carrier aggregation with the second base station, the first base station and the second base station may simultaneously provide the PUCCH, or the first base station and the second base station may not provide the PUCCH at the same time.
  • the user equipment determines that the HARQ feedback information is not sent to the base station if the retransmission indication is received.
  • the retransmission indication may be indicated to the user equipment by means of RRC signaling, and the retransmission indication may also be indicated by the MAC CE.
  • the uplink resource of a base station transmits HARQ feedback information corresponding to the data sent by the first base station or the HARQ feedback information corresponding to the data sent by the second base station by using the uplink resource of the second base station.
  • the handover indication may be indicated by the MAC CE to the user equipment, or may be indicated to the user equipment by means of RRC signaling.
  • step 401 and step 402 are optional steps. Can perform step 401 or Step 402.
  • the user equipment may further receive data sent by the second base station on the PDSCH.
  • step 405 and step 406 may be included.
  • the user equipment before receiving the data sent by the second base station, the user equipment sends the first HARQ feedback information corresponding to the first data by using the PUCCH of the base station.
  • step 409 is performed.
  • step 407 may be performed.
  • the base station is the first base station
  • the handover indication is used to indicate that the user equipment sends the HARQ feedback information corresponding to the data sent by the first base station by using the uplink resource of the first base station
  • the user equipment The first HARQ feedback information corresponding to the first data may be transmitted using a PUCCH of the first base station or may be transmitted using a physical uplink shared channel (PUSCH) of the first base station.
  • PUSCH physical uplink shared channel
  • the base station is the second base station
  • the handover indication is used to indicate that the user equipment uses the uplink resource of the first base station Sending the HARQ feedback information corresponding to the data sent by the first base station
  • the user equipment determines not to use the PUCCH of the base station to transmit the HARQ feedback information corresponding to the data sent by the first base station, and does not use the PUSCH transmission of the base station to correspond to the first HARQ feedback information of data transmitted by a base station.
  • the handover indication is used to indicate that the user equipment uses the uplink resource of the second base station to send the HARQ feedback information corresponding to the data sent by the second base station
  • the user equipment may use the PUCCH of the base station or may use the base station.
  • the PUSCH transmits the first HARQ feedback information.
  • step 408 may be performed, where the user equipment may not send the first HARQ to the base station if the base station does not have uplink resources.
  • the feedback information may also be determined according to step 401 or step 407 that the first HARQ feedback information is not sent to the base station.
  • the user equipment may determine at least two buffers, and the first buffer in the at least two buffers. Save the first data. Specifically, when determining the at least two buffers, the user equipment determines that different buffers have corresponding numbers, and the user equipment may determine, according to the number, a buffer for saving and processing data usage; or the user equipment may also take turns Save and process data using different buffers. The user equipment may also send first HARQ feedback information to the second base station that provides the primary serving cell, so that the second base station feeds back the first HARQ feedback information to the base station.
  • the user equipment can receive a redundancy version of the first data sent by the base station for HARQ retransmission, and process the redundancy version of the first data in the first buffer.
  • the user equipment can also receive new data sent by the base station, and process the new data in a first buffer or a second buffer in the at least two buffers. Specifically, the user equipment may save and process the new data in the first buffer if the first data is successfully received, and the user equipment may be in the second buffer if the first data is not successfully received. Save and process this new data.
  • the user equipment when receiving the data sent by the base station, the user equipment does not need to send the HARQ feedback to the base station, and can receive the redundancy version of the data that the base station performs HARQ retransmission, or the receiving base station. New data sent. In this way, the user equipment can not be solved.
  • the problem of transmitting HARQ feedback information on the PUCCH of the first base station and the PUCCH of the second base station enables the base station to perform the HARQ operation effectively when performing inter-base station carrier aggregation.
  • FIG. 5 is a schematic flowchart of a method of transmitting data according to an embodiment of the present invention.
  • the base station referred to in the method shown in FIG. 5 may be a first base station providing a secondary serving cell, or a second base station providing a primary serving cell, where the first base station Inter-base station carrier aggregation is performed with the second base station.
  • the base station sends a retransmission indication to the user equipment, where the retransmission indication is used to indicate that the user equipment does not need to send the HARQ feedback information corresponding to the first data, where the first data is sent by the base station to the user equipment on the PDSCH. .
  • the retransmission indication may be indicated to the user equipment by means of RRC signaling, and the retransmission indication may also be indicated to the user equipment by means of a MAC CE.
  • the base station sends a cell configuration information or a handover indication to the user equipment, where the cell configuration information is used to indicate that the user equipment sends the uplink information by using the PUCCH of the secondary serving cell, where the handover indication is used to indicate that the user equipment uses the uplink of the first base station.
  • the resource transmits HARQ feedback information corresponding to data transmitted by the first base station or HARQ feedback information corresponding to data transmitted by the second base station by using uplink resources of the second base station.
  • the handover indication may be indicated by the MAC CE to the user equipment, or may be indicated to the user equipment by means of RRC signaling.
  • step 501 and step 502 are optional steps, and step 501 or step 502 may be performed.
  • the base station allocates a downlink resource and a specified HARQ process ID to the user equipment on the physical downlink control channel PDCCH.
  • the user equipment receives the first data that the base station sends to the PDSCH.
  • the user equipment may further receive downlink information sent by the second base station on the PDSCH.
  • the user equipment determines to use the PUCCH of the second base station to send uplink information.
  • the user equipment determines whether the data sent by the second base station on the PDSCH is successfully received, and the second HARQ feedback information is sent in the PUCCH of the second base station, where the second HARQ feedback information corresponds to the data sent by the second base station.
  • the uplink information is transmitted using the PUCCH of the base station. 505. Determine whether the first data is successfully received.
  • the user equipment does not send the first HARQ feedback information corresponding to the first data to the base station.
  • the user equipment sends the first HARQ feedback information to the base station, where the first HARQ feedback information includes a positive acknowledgement (ACK) and a negative acknowledgement (nack).
  • the user equipment may send the first HARQ feedback information on the PUCCH, and may also send the first HARQ feedback information on the PUSCH.
  • the user equipment may further determine, according to the handover indication, whether to send the first HARQ feedback information to the base station.
  • the handover indication is used to indicate that the user equipment uses the uplink resource of the first base station to send data corresponding to the data sent by the first base station.
  • the HARQ feedback information may be that the user equipment may use the PUCCH of the first base station or may send the first HARQ feedback information corresponding to the first data by using the PUSCH of the first base station. If the handover indication is used to indicate that the user equipment uses the uplink resource of the second base station to send HARQ feedback information corresponding to the data sent by the second base station, the user equipment determines not to send the first HARQ feedback information.
  • the handover indication is used to indicate that the user equipment uses the uplink resource of the first base station to send data corresponding to the data sent by the first base station.
  • the HARQ feedback information indicates that the user equipment determines that the HARQ feedback information corresponding to the data sent by the first base station is not used by using the PUCCH of the base station, and does not use the PUSCH of the base station to send the HARQ feedback information corresponding to the data sent by the first base station.
  • the user equipment may use the PUCCH of the base station or may use the base station.
  • the PUSCH transmits the first HARQ feedback information.
  • the base station determines whether to perform HARQ retransmission on the first data.
  • the base station when receiving the first HARQ feedback information, determines, according to the HARQ feedback information, whether to perform HARQ retransmission on the first data.
  • the base station determines whether to perform HARQ retransmission on the first data according to the scheduling policy, if the first HARQ feedback information is not received.
  • the scheduling policy may be that the base station specifies that the HARQ retransmission is always performed on the data, and the number of times the HARQ retransmission is performed is specified. The number of HARQ retransmissions reaches the preset number of times In the case, start sending new data.
  • the scheduling policy may also be that the base station specifies never to perform
  • the scheduling policy may be that the base station may receive a channel quality indicator (CQI) sent by the user equipment, and determine, according to the CQI, whether to perform HARQ retransmission, for example, if the CQI is higher than or equal to a preset value. Send new data and perform HARQ retransmission if the CQI is lower than the preset value.
  • the scheduling policy may be that the base station receives the error rate of the RLC protocol data unit (PDU), and determines whether to perform the HARQ retransmission according to the error rate of the RLC PDU, for example, the error rate is higher than or equal to a preset value.
  • PDU RLC protocol data unit
  • HARQ retransmission new data is transmitted if the error rate is lower than the preset value.
  • RLC radio link control layer
  • ARQ Automatic Retransmission Request
  • the user equipment receives a redundancy version of the first data that the base station performs HARQ retransmission, or receives new data sent by the base station.
  • the base station in the case that the base station retransmits the first data, the base station sends new data to the user equipment, and performs HARQ retransmission in the next subframe after the new data is sent.
  • the base station can perform HARQ retransmission using the same resource and code modulation scheme as transmitting the new data.
  • the base station may determine whether to perform HARQ retransmission according to the scheduling policy without receiving the HARQ feedback information sent by the user equipment. This solves the problem that the user equipment cannot simultaneously transmit HARQ feedback information on the PUCCH of the first base station and the PUCCH of the second base station, so that the base station can perform HARQ operations effectively when performing inter-base station carrier aggregation.
  • FIG. 6 is a schematic flowchart of a method of transmitting data according to an embodiment of the present invention.
  • the method of Figure 6 is performed by a base station, which may be a first base station providing a secondary serving cell, and the base station may also be a second base station providing a primary serving cell.
  • the downlink MAC CE is the encoded MAC CE, not the original MAC CE.
  • the line MAC CE carries.
  • the uplink MAC CE is the encoded MAC CE, not the original MAC CE.
  • the base station can rely on the RLC ARQ mechanism to ensure the reliability of data transmission without performing HARQ retransmission or the number of HARQ retransmissions is small and the data transmission fails.
  • the ARQ mechanism of the RLC layer is only applicable to downlink data from the RLC layer or the upper layer protocol layer, and is not applicable to the MAC CE generated only at the MAC layer.
  • the MAC layer feedback mechanism is introduced, and the uplink MAC CE carrying the HARQ feedback information is used to control the retransmission of the downlink MAC CE, thereby improving the reliability of the MAC CE transmission.
  • FIG. 7 is a schematic flowchart of a method of transmitting data according to an embodiment of the present invention.
  • the method of Figure 7 is performed by a base station, which may be a first base station providing a secondary serving cell, and the base station may also be a second base station providing a primary serving cell.
  • step 701 may be included.
  • first data to the user equipment on the PDSCH, where the first data is data that includes a downlink MAC CE.
  • the downlink MAC CE is the encoded MAC CE, not the original MAC CE.
  • the HARQ feedback information sent by the user equipment is received, send new data to the user equipment, where the HARQ feedback information is carried by the uplink MAC CE sent by the user equipment on the PUSCH.
  • the uplink MAC CE is the encoded MAC CE, not the original MAC CE.
  • the timer is up to a preset time and the HARQ feedback information sent by the user equipment is not received, the first data information HARQ is retransmitted.
  • the base station may send a redundancy version of the first data to the user equipment.
  • the base station also The second data including the downlink MAC CE may be determined, and the second data is sent to the user equipment.
  • the downlink MAC CE may generate a separate MAC PDU or multiplex with other uplink data to generate a new MAC PDU as the second data and send the data to the user equipment.
  • the base station may further set a maximum number of retransmissions for HARQ retransmission of the first data.
  • the base station may send new data to the user equipment.
  • the base station may further perform HARQ retransmission on the first data according to the scheduling policy.
  • the HARQ retransmission and the number of HARQ retransmissions may be determined according to the CQI received by the user equipment.
  • the base station can rely on the RLC ARQ mechanism to ensure the reliability of data transmission without performing HARQ retransmission or the number of HARQ retransmissions is small and the data transmission fails.
  • the ARQ mechanism of the RLC layer is only applicable to downlink data from the RLC layer or the upper layer protocol layer, and is not applicable to the MAC CE generated only at the MAC layer.
  • the MAC layer feedback mechanism is introduced, and the uplink MAC CE carrying the HARQ feedback information is used to control the retransmission of the downlink MAC CE, thereby improving the reliability of the MAC CE transmission.
  • FIG. 8 is a schematic flowchart of a method of transmitting data according to an embodiment of the present invention. The method shown in Figure 8 is performed by the user equipment.
  • the downlink MAC CE is the encoded MAC CE, not the original MAC CE.
  • the uplink MAC CE is the encoded MAC CE, not the original MAC CE.
  • the base station may be a first base station that provides a secondary serving cell, and the base station may also be a second base station that provides a primary serving cell.
  • the base station can rely on the ARQ mechanism of the RLC to ensure the reliability of data transmission without performing HARQ retransmission or the number of HARQ retransmissions is small and the data transmission fails.
  • the ARQ mechanism of the RLC layer is only applicable to downlink data from the RLC layer or the upper protocol layer, and is not applicable to the MAC CE generated only at the MAC layer. Taking the method of Figure 8, the MAC layer feedback mechanism is introduced to improve the reliability of MAC CE transmission.
  • FIG. 9a is a schematic flowchart of a method of transmitting data according to an embodiment of the present invention. The method shown in Figure 9a is performed by the user equipment.
  • the downlink MAC CE is the encoded MAC CE, not the original MAC CE.
  • the uplink MAC CE is not sent to the base station.
  • the uplink MAC CE is the encoded MAC CE, not the original MAC CE.
  • the static payload format of the uplink MAC CE is as shown in FIG. 9b.
  • the value of any bit of b0-b4 is successful and the downlink MAC CE is successfully decoded.
  • a value of 0 indicates that the corresponding downlink MAC CE does not exist.
  • R denotes a reserved field. After a new downlink MAC CE is introduced, R may be used to indicate HARQ ACK feedback corresponding to the new downlink MAC CE.
  • the uplink MAC CE is sent to the base station, receive new data sent by the base station, where the data for performing HARQ retransmission is a redundancy version of the first data or second data including the downlink MAC CE.
  • the user equipment sends the uplink MAC CE to the base station, but the base station does not receive the uplink MAC CE because the transmission fails.
  • the user equipment can also receive data from the base station for HARQ retransmission.
  • the receiving base station performs HARQ retransmitted data.
  • the base station may be a first base station that provides a secondary serving cell, and the base station may also be a second base station that provides a primary serving cell.
  • the base station can rely on the RLC ARQ mechanism to ensure the reliability of data transmission without performing HARQ retransmission or the number of HARQ retransmissions is small and the data transmission fails.
  • the ARQ mechanism of the RLC layer is only applicable to downlink data from the RLC layer or the upper layer protocol layer, and is not applicable to the MAC CE generated only at the MAC layer.
  • the MAC layer feedback mechanism is introduced to improve the reliability of MAC CE transmission.
  • FIG. 10 is a schematic structural diagram of a base station according to an embodiment of the present invention.
  • the base station 1000 shown in Fig. 10 can perform the various steps of Fig. 1.
  • the base station 1000 includes a transmitting unit 1001 and a control unit 1002.
  • the sending unit 1001 is configured to send the first data to the user equipment on the PDSCH.
  • the control unit 1002 is configured to determine, according to the scheduling policy, whether to perform HARQ retransmission on the first data.
  • the base station 1000 may be a first base station that provides a secondary serving cell, and the base station 1000 may also be a second base station that provides a primary serving cell.
  • the base station 1000 can determine whether to perform HARQ retransmission according to the scheduling policy. This solves the problem that the user equipment cannot simultaneously transmit HARQ feedback on the PUCCH of the first base station and the PUCCH of the second base station, so that the base station 1000 can perform HARQ operations effectively when performing inter-base station carrier aggregation.
  • FIG. 11 is a schematic structural diagram of a base station according to an embodiment of the present invention.
  • the base station 1100 shown in Fig. 11 can perform the various steps performed by the base station in Fig. 1 or Fig. 2.
  • the base station 1100 includes a transmitting unit 1101, a control unit 1102, and a receiving unit 1103.
  • the base station 1100 may be a first base station providing a secondary serving cell, and the base station 1000 may also be a second base station providing a primary serving cell.
  • the control unit 1102 is configured to allocate a downlink resource and a specified HARQ process ID to the user equipment in the PDCCH.
  • the sending unit 1101 is configured to send the first data to the user equipment on the PDSCH.
  • the control unit 1102 is further configured to determine, according to the scheduling policy, whether to perform HARQ retransmission on the first data.
  • the receiving unit 1102 is configured to determine whether to perform the HARQ retransmission according to the scheduling policy, and the method includes: the control unit 1102 is configured to specify that the scheduling policy is always performing HARQ retransmission.
  • the control unit 1102 is specifically configured to specify that the scheduling policy is that no HARQ retransmission is performed.
  • the control unit 1102 is specifically configured to specify that the scheduling policy is to determine whether to perform HARQ retransmission according to an error rate of the CQI or the RLC PDU received by the receiving unit 1103.
  • the receiving unit 1103 is configured to receive first HARQ feedback information sent by the user equipment, where the first HARQ feedback information corresponds to the first data.
  • the control unit 1102 is further configured to specify the scheduling policy to determine whether to perform HARQ retransmission according to the first HARQ feedback information.
  • the sending unit 1101 is further configured to: before sending the first data to the user equipment, send, to the user equipment, a handover indication, where the handover indication is used to indicate that the user equipment uses the PUCCH transmission of the first base station to correspond to the first
  • the HARQ feedback information of the data transmitted by the base station or the HARQ feedback information corresponding to the data transmitted by the second base station is transmitted using the PUCCH of the second base station.
  • the sending unit 1101 is specifically configured to send new data to the user equipment, and perform HARQ retransmission in the next subframe in which the new data is sent.
  • the sending unit 1101 is further configured to perform the HARQ retransmission using the same resource and modulation and coding manner as the new data is sent.
  • the sending unit 1101 is further configured to: before sending the first data to the user equipment, send a retransmission indication to the user equipment, where the retransmission indication is used to indicate that the user equipment does not need to send the first HARQ feedback information. .
  • the sending unit 1101 is further configured to: before sending the first data to the user equipment, send, to the user equipment, cell configuration information, where the cell configuration information is used to indicate that the user equipment sends the uplink by using a PUCCH of the secondary serving cell. information.
  • the control unit 1102 may be configured to determine at least two buffers for each downlink HARQ process. Specifically, the control unit 1102 is configured to determine, when determining the at least two buffers, that different buffers have corresponding numbers, and the control unit 1102 can be configured to determine, according to the number, a buffer for sending data and processing HARQ corresponding to the data. A buffer of feedback information; or the control unit 1102 may be further configured to determine to transmit data using different buffers in turn and use the buffer to process HARQ feedback information corresponding to the data.
  • the sending unit 1101 can be configured to transmit data using one of the at least two buffers and another data using another buffer.
  • the receiving unit 1103 is configured to receive the HARQ feedback information sent by the user equipment by using the second base station, and the control unit 1102 is configured to determine, according to the HARQ feedback information, whether to perform the HARQ retransmission. Specifically, when receiving the HARQ feedback information, the receiving unit 1103 may also And a method for receiving one or more of a HARQ process ID, HARQ time information, and buffer index information corresponding to the HARQ feedback information.
  • the control unit 1102 is configured to determine, according to one or more of the HARQ process ID, the HARQ time information, and the buffer index information, a used buffer, where the control unit 1102 can be configured to determine, according to the HARQ feedback in the buffer.
  • the data corresponding to the HARQ feedback is retransmitted, or it is determined that new data is sent to the user equipment in the buffer.
  • the control unit 1102 is further configured to expire one or more HARQ Round Trip Time (RTT) after transmitting data in one of the at least two buffers, and the user equipment is not received.
  • RTT Round Trip Time
  • the sending unit 1101 is further configured to send a redundant version of the first data by using the first buffer, or send the new data by using the first buffer or the second buffer.
  • the control unit 1102 may be configured to determine at least two buffers for the first downlink HARQ process where the first data is located.
  • the sending unit 1101 is configured to send the first data to the user equipment by using the first buffer in the at least two buffers.
  • the receiving unit 1103 can be configured to receive first HARQ feedback information that is sent by the user equipment by using the second base station.
  • the receiving unit 1103 is further configured to receive one or more of the following: the first HARQ process ID, the first HARQ time information, and the first buffer index information, where the first HARQ process ID, the first HARQ time The information and the first buffer index information correspond to the first HARQ feedback information.
  • the control unit 1102 is configured to determine, according to the first HARQ feedback information, performing HARQ retransmission or sending new data on the first data by using the first buffer in the at least two buffers. Specifically, the control unit 1102 determines whether to perform HARQ retransmission on the first data according to the first HARQ feedback information. The control unit 1102 determines, according to the first HARQ process ID, the first HARQ time information, or the first buffer index information, a first buffer for processing the first HARQ feedback in the at least two buffers.
  • the control unit 1102 determines to use the first of the at least two buffers. Two buffers, and the new data is sent on the same HARQ process.
  • the sending unit 1101 is further configured to send a redundant version of the first data by using the first buffer, or send the new data by using the first buffer or the second buffer.
  • the base station 1100 can determine whether to perform according to the scheduling policy.
  • HARQ retransmission This solves the problem that the user equipment cannot simultaneously be at the PUCCH and the second base of the first base station.
  • the problem of transmitting HARQ feedback on the PUCCH of the station enables the base station 1100 to perform HARQ operations efficiently when performing inter-base station carrier aggregation.
  • FIG. 12 is a schematic structural diagram of a user equipment according to an embodiment of the present invention.
  • the user equipment 1200 shown in FIG. 12 can perform the various steps performed by the user equipment in FIG.
  • User equipment 1200 includes: a first receiving unit 1201 and a second receiving unit 1202.
  • the first receiving unit 1201 is configured to receive first data that is sent by the base station on the PDSCH.
  • the second receiving unit 1202 is configured to receive a redundancy version of the first data that the base station performs HARQ retransmission according to the scheduling policy, or receive new data that is sent by the base station according to the scheduling policy.
  • the base station is a first base station that provides a secondary serving cell or a second base station that provides a primary serving cell, and the first base station and the second base station perform carrier aggregation between the base stations.
  • the user equipment 1200 when receiving the data sent by the base station, the user equipment 1200 does not need to send the HARQ feedback to the base station, and can receive the redundancy version of the data that the base station performs HARQ retransmission. Or receive new data sent by the base station.
  • the problem that the user equipment cannot simultaneously transmit the HARQ feedback on the PUCCH of the first base station and the PUCCH of the second base station can be solved, so that the base station can perform the HARQ operation effectively when performing inter-base station carrier aggregation.
  • FIG. 13 is a schematic structural diagram of a user equipment according to an embodiment of the present invention.
  • the user equipment 1300 shown in FIG. 13 can perform the various steps performed by the user equipment in FIG. 3 or FIG.
  • the user equipment 1300 includes: a first receiving unit 1301, a second receiving unit 1302, a control unit 1303, a transmitting unit 1304, a third receiving unit 1305, a fourth receiving unit 1306, and a fifth receiving unit 1307.
  • the first receiving unit 1301 is configured to receive first data that is sent by the base station on the PDSCH.
  • the second receiving unit 1302 is configured to receive a redundancy version of the first data that the base station performs HARQ retransmission according to the scheduling policy, or receive new data that is sent by the base station according to the scheduling policy.
  • the base station is a first base station that provides a secondary serving cell or a second base station that provides a primary serving cell, and the first base station and the second base station perform carrier aggregation between the base stations.
  • control unit 1303 is further configured to determine whether the first data is successfully received.
  • the sending unit 1304 is configured to send first HARQ feedback information to the base station, where the first HARQ feedback information corresponds to the first data.
  • the third receiving unit 1305 is configured to receive a retransmission indication sent by the base station, where the retransmission indication is used to indicate that the user equipment 1300 does not need to send HARQ feedback information corresponding to data transmitted by the base station.
  • the fourth receiving unit 1306 is configured to receive cell configuration information sent by the base station, where the cell configuration information is used to indicate that the user equipment 1300 uses the secondary serving cell.
  • the PUCCH sends uplink information.
  • the first receiving unit 1301 is further configured to receive the second base station when receiving the first data sent by the base station. Downlink information sent on the PDSCH.
  • the control unit 1303 is further configured to determine that the uplink information is sent by the second base station on the PUCCH.
  • the sending unit 1304 is configured to send second HARQ feedback information corresponding to the data sent by the second base station in the PUCCH of the second base station.
  • the control unit 1303 is further configured to: when the second HARQ feedback information is sent, determine to use the PUCCH of the base station to send uplink information.
  • the fifth receiving unit 1307 is configured to receive a handover indication sent by the base station, where the handover indication is used to indicate that the user equipment 1300 uses the first base station.
  • the uplink resource sends the HARQ feedback information corresponding to the data sent by the first base station or the HARQ feedback information corresponding to the data sent by the second base station by using the uplink resource of the second base station.
  • the control unit 1303 is configured to determine whether the first data is successfully received.
  • the sending unit 1304 is further configured to: according to the handover indication, use the uplink resource of the first base station to send the HARQ feedback information corresponding to the data sent by the first base station, or use the uplink resource of the second base station to send the data corresponding to the data sent by the second base station. HARQ feedback information.
  • the sending unit 1304 is further configured to send the CQI to the base station.
  • the control unit 1303 may determine at least two buffers, and the first buffer in the at least two buffers. Save the first data. Specifically, when determining the at least two buffers, the control unit 1303 determines that different buffers have corresponding numbers, and the control unit 1303 may determine, according to the number, a buffer for saving and processing data usage; or the control unit 1303 may take turns. Save and process data using different buffers.
  • the sending unit 1304 may further send the first HARQ feedback information to the second base station that provides the primary serving cell, so that the second base station feeds back the first HARQ feedback information to the base station.
  • the second receiving unit 1302 may receive a redundancy version of the first data that the base station performs HARQ retransmission, and the control unit 1303 may process the redundancy version of the first data in the first buffer.
  • the second receiving unit 1302 can also receive new data sent by the base station, and the control unit 1303 can process the new data in the first buffer or the second buffer in the at least two buffers. Specifically, the control unit 1303 may determine that the first data is successfully received.
  • the first buffer saves and processes the new data, and the control unit 1303 can save and process the new data in the second buffer if it is determined that the first data is not successfully received.
  • the user equipment 1300 when receiving the data sent by the base station, the user equipment 1300 does not need to send the HARQ feedback to the base station, and can receive the redundancy version of the data that the base station performs HARQ retransmission. Or receive new data sent by the base station.
  • the problem that the user equipment cannot simultaneously transmit the HARQ feedback on the PUCCH of the first base station and the PUCCH of the second base station can be solved, so that the base station can perform the HARQ operation effectively when performing inter-base station carrier aggregation.
  • FIG. 14 is a schematic structural diagram of a base station according to an embodiment of the present invention.
  • the base station 1400 of FIG. 14 may perform the steps performed by the base station in FIG. 6 or FIG. 7, wherein the base station 1400 may be the first base station providing the secondary serving cell or the second base station providing the primary serving cell.
  • the base station 1400 includes: a transmitting unit 1401, a receiving unit 1402, and a control unit 1403.
  • the sending unit 1401 is configured to send the first data to the user equipment on the PDSCH, where the first data is data that includes the downlink MAC CE.
  • the downlink MAC CE is the encoded MAC CE, not the original MAC CE.
  • the receiving unit 1402 is configured to receive HARQ feedback information sent by the user equipment, where the HARQ feedback information is carried by the uplink MAC CE sent by the user equipment on the PUSCH.
  • the uplink MAC CE is the encoded MAC CE, not the original MAC CE.
  • the control unit 1403 is configured to determine to send new data to the user equipment or perform HARQ retransmission on the first data.
  • the sending unit 1401 is further configured to send new data to the user equipment or send data for performing HARQ retransmission.
  • the base station 1400 of FIG. 14 since the MAC layer feedback mechanism is introduced, it can be improved.
  • control unit 1403 is further configured to start timing when the sending unit 1401 completes the first data transmission.
  • the control unit 1403 is specifically configured to determine to perform HARQ retransmission if the timing reaches a preset threshold and the uplink MAC CE is not received.
  • the control unit 1403 is specifically configured to: when the uplink MAC CE is received within a preset time, determine to send new data to the user equipment.
  • the control unit 1403 is further configured to determine data for performing HARQ retransmission in the case of determining to perform HARQ retransmission.
  • control unit 1403 is specifically configured to determine second data including the downlink MAC CE, for example, the downlink MAC CE may generate a separate MAC PDU or be multiplexed with other uplink data to generate a new MAC PDU as the second data. .
  • the sending unit 1401 sends the second data to the user equipment.
  • control unit 1403 is specifically configured to determine a redundancy version of the first data.
  • the transmitting unit 1401 transmits a redundancy version of the first data to the user equipment.
  • control unit 1403 is further configured to determine a maximum number of retransmissions.
  • the sending unit 1402 is further configured to: when the number of times that the HARQ retransmission is performed reaches the maximum number of retransmissions, and the receiving unit 1402 does not receive the uplink MAC CE, send the new data to the user equipment.
  • FIG. 15 is a schematic structural diagram of a user equipment according to an embodiment of the present invention.
  • the user equipment 1500 shown in Fig. 15 can perform the various steps performed by the user equipment in Fig. 8 or Fig. 9.
  • the user equipment 1500 includes: a receiving unit 1501, a control unit 1502, and a transmitting unit 1503.
  • the receiving unit 1501 is configured to receive first data that is sent by the base station on the PDSCH, where the first data is data that includes the downlink MAC CE.
  • the downlink MAC CE is the encoded MAC CE, not the original MAC CE.
  • the control unit 1502 is configured to determine whether the first data is successfully received and decoded.
  • the sending unit 1503 is configured to send, to the base station, an uplink MAC CE that carries HARQ feedback information.
  • control unit 1502 determines an uplink MAC CE in the case where it is determined that the first data is successfully received and decoded, wherein the uplink MAC CE carries the HARQ positive acknowledgement information.
  • the transmitting unit 1503 transmits the uplink MAC CE to the base station.
  • the uplink MAC CE is the encoded MAC CE, not the original MAC CE.
  • the receiving unit 1501 is further configured to receive data that is sent by the base station for HARQ retransmission or new data that is sent by the base station.
  • the HARQ retransmitted data is a redundancy version of the first data or a second data including the first data.
  • the base station may be a first base station that provides a secondary serving cell, and the base station may also be a second base station that provides a primary serving cell.
  • the base station since the MAC layer feedback mechanism is introduced, the reliability of the MAC CE transmission can be improved.
  • the present invention provides a base station, which can perform the steps of FIG.
  • the base station includes a transmitter and a processor.
  • a transmitter configured to send the first data to the user equipment on the PDSCH.
  • the base station may be a first base station that provides a secondary serving cell, and the base station may also be a second base station that provides a primary serving cell.
  • the base station can determine whether to perform HARQ retransmission according to the scheduling policy. This solves the problem that the user equipment cannot simultaneously transmit HARQ feedback on the PUCCH of the first base station and the PUCCH of the second base station, and cannot effectively support the HARQ operation problem of carrier aggregation between the base stations.
  • the present invention provides a base station, which can perform the steps performed by the base station in Figure 1 or Figure 2.
  • the base station includes a transmitter, a processor and a receiver.
  • the base station may be a first base station providing a secondary serving cell, and the base station may also be a second base station providing a primary serving cell.
  • the processor is configured to allocate a downlink resource and a specified HARQ process ID to the user equipment in the PDCCH.
  • a transmitter configured to send the first data to the user equipment on the PDSCH.
  • the processor is further configured to determine whether to perform HARQ retransmission on the first data according to the scheduling policy.
  • the receiver is configured to determine, according to the scheduling policy, whether to perform HARQ retransmission, and the method includes: a processor, where the scheduling policy is configured to always perform HARQ retransmission.
  • the processor is specifically configured to specify that the scheduling policy is that no HARQ retransmission is performed.
  • the processor is specifically configured to specify that the scheduling policy is to determine whether to perform HARQ retransmission according to an error rate of the CQI or the RLC PDU received by the receiver.
  • the receiver is configured to receive first HARQ feedback information sent by the user equipment, where the first HARQ feedback information corresponds to the first data.
  • the processor is further configured to specify that the scheduling policy is to determine whether to perform HARQ retransmission according to the first HARQ feedback information.
  • the transmitter is further configured to send, to the user equipment, a handover indication, where the handover indication is used to indicate that the user equipment uses the PUCCH of the first base station to send, corresponding to the first base station, before sending the first data to the user equipment.
  • the HARQ feedback information of the transmitted data or the HARQ feedback information corresponding to the data transmitted by the second base station is transmitted using the PUCCH of the second base station.
  • the transmitter is specifically used to New data is sent to the user equipment, and HARQ retransmission is performed in the next subframe in which the new data is transmitted.
  • the transmitter is further configured to perform the HARQ retransmission using the same resource and modulation coding method as transmitting the new data.
  • the transmitter is further configured to send a retransmission indication to the user equipment before sending the first data to the user equipment, where the retransmission indication is used to indicate that the user equipment does not need to send the first HARQ feedback information.
  • the transmitter is further configured to: before the first data is sent to the user equipment, send the cell configuration information to the user equipment, where the cell configuration information is used to indicate that the user equipment sends the uplink information by using the PUCCH of the secondary serving cell. .
  • the processor may be configured to determine at least two buffers for each downlink HARQ process. Specifically, the processor is configured to determine, when determining the at least two buffers, that different buffers have corresponding numbers, and the processor may be configured to determine, according to the number, a buffer for sending data and processing HARQ feedback information corresponding to the data. The buffer; or the processor may be further configured to determine to transmit data using different buffers in turn and use the buffer to process HARQ feedback information corresponding to the data. The sender can be used to send data using one of the at least two buffers and another data to send another data.
  • the receiver may be configured to receive HARQ feedback information sent by the user equipment by using the second base station, and the processor is configured to determine, according to the HARQ feedback information, whether to perform HARQ retransmission.
  • the receiver when receiving the HARQ feedback information, the receiver may further be configured to receive one or more of a HARQ process ID, HARQ time information, and buffer index information corresponding to the HARQ feedback information.
  • the processor is configured to determine, according to one or more of the HARQ process ID, the HARQ time information, and the buffer index information, a used buffer, where the processor may be configured to determine, according to the HARQ feedback, the HARQ feedback corresponding to the HARQ feedback.
  • the data is retransmitted, or it is determined that new data is sent to the user equipment in the buffer.
  • the processor is further configured to expire one or more HARQ loop times (RTTs) after the data is sent in one of the at least two buffers, and the user equipment is not received through the second
  • RTTs HARQ loop times
  • the transmitter is further configured to send a redundant version of the first data using the first buffer or to transmit new data using the first buffer or the second buffer.
  • the processor can be used for The first downlink HARQ process in which the data is located determines at least two buffers.
  • the sender may be configured to send the first data to the user equipment using the first one of the at least two buffers.
  • the receiver may be configured to receive first HARQ feedback information sent by the user equipment by using the second base station.
  • the receiver may be further configured to receive one or more of the following: the first HARQ process ID, the first HARQ time information, and the first buffer index information, where the first HARQ process ID, the first HARQ time information And the first buffer index information corresponds to the first HARQ feedback information.
  • the processor may be configured to determine, according to the first HARQ feedback information, performing HARQ retransmission or transmitting new data on the first data by using the first buffer in the at least two buffers. Specifically, the processor determines, according to the first HARQ feedback information, whether to perform HARQ retransmission on the first data. The processor determines, according to the first HARQ process ID, the first HARQ time information, or the first buffer index information, a first buffer in the at least two buffers for processing the first HARQ feedback. In addition, the processor determines to use the second one of the at least two buffers when one or more HARQ RTTs after the first data is transmitted expires and the base station does not receive the first HARQ feedback sent by the second base station. Buffer, and send the new data on the same HARQ process. The transmitter is further configured to send a redundant version of the first data using the first buffer, or send the new data using the first buffer or the second buffer.
  • the base station can determine whether to perform HARQ retransmission according to the scheduling policy. This solves the problem that the user equipment cannot simultaneously transmit HARQ feedback on the PUCCH of the first base station and the PUCCH of the second base station, and cannot effectively support the HARQ operation problem of carrier aggregation between the base stations.
  • the embodiment of the present invention provides a user equipment, where the user equipment can perform various steps performed by the user equipment in FIG.
  • the user equipment includes: a receiver and a processor.
  • the receiver is configured to receive first data that is sent by the base station on the PDSCH.
  • a processor configured to process the first data.
  • the receiver is further configured to receive a redundancy version of the first data that the base station performs HARQ retransmission according to the scheduling policy, or receive new data that is sent by the base station according to the scheduling policy.
  • the processor is further configured to process a redundant version of the first data or process the new data.
  • the base station is a first base station that provides a secondary serving cell or a second base station that provides a primary serving cell, and the first base station and the second base station perform carrier aggregation between the base stations.
  • the user equipment When receiving the data sent by the base station, the user equipment does not need to send the HARQ feedback to the base station, and can receive the redundancy version of the data that the base station performs HARQ retransmission, or receive the new data sent by the base station. In this way, it can be solved that the user equipment cannot be at the same time in the first base station.
  • the HARQ feedback is transmitted on the PUCCH of the PUCCH and the second base station, and the HARQ operation problem of carrier aggregation between the base stations cannot be effectively supported.
  • the embodiment of the present invention provides a user equipment, where the user equipment can perform various steps performed by the user equipment in FIG. 3 or FIG.
  • the user equipment includes: a receiver, a receiver, a processor, a transmitter, a receiver, a receiver, and a receiver.
  • the receiver is configured to receive first data that is sent by the base station on the PDSCH.
  • a processor configured to process the first data.
  • the receiver is further configured to receive a redundancy version of the first data that the base station performs HARQ retransmission according to the scheduling policy, or receive new data sent by the base station according to the scheduling policy.
  • the processor is further configured to process a redundant version of the first data or process the new data.
  • the base station is a first base station that provides a secondary serving cell or a second base station that provides a primary serving cell, and the first base station and the second base station perform carrier aggregation between the base stations.
  • the processor is further configured to determine whether the first data is successfully received.
  • a transmitter configured to send first HARQ feedback information to the base station, where the first HARQ feedback information corresponds to the first data.
  • the receiver before the receiver receives the first data sent by the base station, the receiver is further configured to receive a retransmission indication sent by the base station, where the retransmission indication is used to indicate that the user equipment does not need to send the corresponding base station.
  • HARQ feedback information of the transmitted data is further configured to receive a retransmission indication sent by the base station, where the retransmission indication is used to indicate that the user equipment does not need to send the corresponding base station.
  • the receiver before the receiver receives the first data sent by the base station, the receiver is further configured to receive cell configuration information sent by the base station, where the cell configuration information is used to indicate that the user equipment sends the uplink by using the PUCCH of the secondary serving cell. information.
  • the base station when the base station is the first base station and the receiver receives the cell configuration information, when receiving the first data sent by the base station, the receiver is further configured to receive downlink information sent by the second base station on the PDSCH. .
  • the processor is further configured to determine that the uplink information is sent by the second base station on the PUCCH.
  • a transmitter configured to send second HARQ feedback information corresponding to the data sent by the second base station in the PUCCH of the second base station.
  • the processor is further configured to: when the second HARQ feedback information is sent, determine to use the PUCCH of the base station to send uplink information.
  • the receiver before the receiver receives the first data sent by the base station, the receiver is further configured to receive a handover indication sent by the base station, where the handover indication is used to indicate that the user equipment sends the uplink resource corresponding to the first base station.
  • the HARQ feedback information of the data transmitted by the first base station or the HARQ feedback information corresponding to the data sent by the second base station is transmitted by using the uplink resource of the second base station.
  • the processor is further configured to determine whether the first data is successfully received.
  • the transmitter is further configured to: use the uplink resource of the first base station to send the HARQ feedback information corresponding to the data sent by the first base station, or use the uplink resource of the second base station to send the data corresponding to the second base station, according to the handover indication.
  • HARQ feedback information is further configured to: use the uplink resource of the first base station to send the HARQ feedback information corresponding to the data sent by the first base station, or use the uplink resource of the second base station to send the data
  • the transmitter is further configured to send a CQI to the base station.
  • the processor may determine at least two buffers, and save the first buffer in the at least two buffers. First data. Specifically, when determining the at least two buffers, the processor determines that different buffers have corresponding numbers, and the processor may determine, according to the number, a buffer for saving and processing data usage; or the processor may further use different The buffer saves and processes the data.
  • the transmitter may also send first HARQ feedback information to the second base station providing the primary serving cell, so that the second base station feeds back the first HARQ feedback information to the base station.
  • the receiver may receive a redundancy version of the first data that the base station performs HARQ retransmission, and the processor may process the redundancy version of the first data in the first buffer.
  • the receiver can also receive new data sent by the base station, and the processor can process the new data in the first buffer or the second buffer in the at least two buffers. Specifically, the processor may save and process the new data in the first buffer if it is determined that the first data is successfully received, and the processor may be in the second buffer if it is determined that the first data is not successfully received. Save and process this new data.
  • the user equipment When receiving the data sent by the base station, the user equipment does not need to send HARQ feedback to the base station, and can receive a redundancy version of the data that the base station performs HARQ retransmission, or receive new data sent by the base station. In this way, it can be solved that the user equipment cannot simultaneously transmit HARQ feedback on the PUCCH of the first base station and the PUCCH of the second base station, and cannot effectively support the HARQ operation problem of carrier aggregation between the base stations.
  • the embodiment of the present invention provides a base station, where the base station may perform the steps performed by the base station in FIG. 6 or FIG. 7, where the base station may be the first base station that provides the secondary serving cell, or may provide the primary serving cell.
  • the base station includes: a transmitter, a receiver, and a processor.
  • a transmitter configured to send the first data to the user equipment on the PDSCH, where the first data is data that includes a downlink MAC CE.
  • the downlink MAC CE is the encoded MAC CE, not the original MAC CE.
  • a receiver configured to receive HARQ feedback information sent by the user equipment, where the HARQ The feedback information is carried by the uplink MAC CE sent by the user equipment on the PUSCH.
  • the uplink MAC CE is the encoded MAC CE, not the original MAC CE.
  • a processor configured to determine to send new data to the user equipment or perform HARQ retransmission on the first data.
  • the transmitter is further configured to send new data to the user equipment or send data for HARQ retransmission.
  • the base station Since the base station introduces a MAC layer feedback mechanism, the reliability of the MAC CE transmission can be improved.
  • the processor is further configured to start timing when the transmitter completes the first data transmission.
  • the processor is specifically configured to determine to perform HARQ retransmission if the timing reaches a preset threshold and the uplink MAC CE is not received.
  • the processor is specifically configured to: when the uplink MAC CE is received within a preset time, determine to send new data to the user equipment.
  • the processor is further configured to determine data for performing HARQ retransmission when determining to perform HARQ retransmission.
  • the processor is specifically configured to determine second data including the downlink MAC CE, for example, the downlink MAC CE may generate a separate MAC PDU or be multiplexed with other uplink data to generate a new MAC PDU as the second data.
  • the sender sends the second data to the user equipment.
  • the processor is specifically configured to determine a redundancy version of the first data. The sender sends a redundant version of the first data to the user device.
  • the processor is also used to determine the maximum number of retransmissions.
  • Transmitter also used for
  • the number of HARQ retransmissions reaches the maximum number of retransmissions, and if the receiver does not receive the uplink MAC CE, new data is sent to the user equipment.
  • the embodiment of the present invention provides a user equipment, where the user equipment can perform various steps performed by the user equipment in FIG. 8 or FIG.
  • the user equipment includes: a receiver, a processor, and a transmitter.
  • a receiver configured to receive first data that is sent by the base station on the PDSCH, where the first data is data that includes a downlink MAC CE.
  • the downlink MAC CE is the encoded MAC CE, not the original MAC CE.
  • a processor configured to determine whether the first data is successfully received and decoded.
  • a transmitter configured to send, to the base station, an uplink MAC CE that carries the HARQ feedback information.
  • the processor determines the uplink in the case of determining that the first data is successfully received and decoded.
  • the MAC CE where the uplink MAC CE carries the HARQ positive acknowledgement information.
  • the sender sends the upstream MAC CE to the base station.
  • the uplink MAC CE is the encoded MAC CE, not the original MAC CE.
  • the receiver is further configured to receive data sent by the base station for HARQ retransmission or new data sent by the base station.
  • the HARQ retransmitted data is a redundancy version of the first data or a second data including the first data.
  • the base station may be a first base station that provides a secondary serving cell, and the base station may also be a second base station that provides a primary serving cell.
  • the reliability of the MAC CE transmission can be improved.
  • the disclosed systems, devices, and methods may be implemented in other ways.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not executed.
  • the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be electrical, mechanical or otherwise.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. You can choose some of them according to actual needs or All units are used to achieve the objectives of the solution of this embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the functions, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium.
  • the technical solution of the present invention which is essential to the prior art or part of the technical solution, may be embodied in the form of a software product stored in a storage medium, including
  • the instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to perform all or part of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a U disk, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like, which can store program code. .

Abstract

La présente invention concerne un procédé de transmission de données, une station de base et un équipement d'utilisateur. Le procédé comprend les étapes suivantes : lorsqu'une agrégation de porteuses entre des stations de base est réalisée sur une première station de base, qui fournit une cellule de desserte auxiliaire, et une seconde station de base qui fournit une cellule de desserte principale, la première station de base ou la seconde station de base envoie des premières données à un équipement d'utilisateur sur un canal PDSCH (canal physique partagé de liaison descendante) ; et détermination de réaliser une retransmission HARQ sur les premières données selon une politique de planification. Par conséquent, la présente invention permet de résoudre le problème selon lequel l'équipement d'utilisateur ne peut pas envoyer des informations en retour HARQ simultanément sur un canal PUCCH (canal de contrôle physique de liaison montante) de la première station de base et sur un canal PUCCH de la seconde station de base, et la station de base peut efficacement prendre en charge une opération HARQ pour une agrégation de porteuses entre des stations de base.
PCT/CN2013/071277 2013-02-01 2013-02-01 Procédé de transmission de données, station de base, et équipement d'utilisateur WO2014117391A1 (fr)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016070702A1 (fr) * 2014-11-06 2016-05-12 电信科学技术研究院 Procédé, dispositif et système de programmation de canaux de données
CN108418659A (zh) * 2017-02-10 2018-08-17 中兴通讯股份有限公司 一种数据传输方法、装置及相关设备
WO2019153125A1 (fr) * 2018-02-06 2019-08-15 Oppo广东移动通信有限公司 Procédé et dispositif de transmission de données et support d'informations informatique
US11690132B2 (en) * 2019-09-03 2023-06-27 Qualcomm Incorporated Medium access control-control element (MAC-CE) communication

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105978624B (zh) * 2016-07-28 2018-03-16 哈尔滨工业大学 空间光通信中自动重传请求机制性能的获取方法
CN109690994B (zh) * 2017-01-05 2020-05-22 北京欧珀通信有限公司 传输反馈信息的方法、网络设备和终端设备
US11812518B2 (en) * 2020-11-17 2023-11-07 Microsoft Technology Licensing, Llc Virtualized radio access network (vRAN) decoding as a service
WO2023050416A1 (fr) * 2021-09-30 2023-04-06 Huizhou Tcl Cloud Internet Corporation Technology Co.Ltd Procédé de retransmission de rétroaction harq-ack annulée, procédé de commutation de porteuse de pucch pour rétroaction harq-ack, et dispositifs associés

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101388756A (zh) * 2007-09-11 2009-03-18 大唐移动通信设备有限公司 一种数据包的传输方法和装置
CN101990242A (zh) * 2009-07-31 2011-03-23 夏普株式会社 频谱聚合系统中的自适应重传方法和用户设备
CN102625432A (zh) * 2011-01-28 2012-08-01 华为技术有限公司 一种非连续接收的方法和装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5515559B2 (ja) * 2009-09-25 2014-06-11 ソニー株式会社 通信システム、基地局、および通信装置
CN102612088B (zh) * 2011-01-18 2016-01-27 华为技术有限公司 异构网络中基于载波汇聚技术的通信方法与系统、基站
CN102255718B (zh) * 2011-07-11 2013-09-11 电信科学技术研究院 一种载波聚合系统中的数据传输方法及装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101388756A (zh) * 2007-09-11 2009-03-18 大唐移动通信设备有限公司 一种数据包的传输方法和装置
CN101990242A (zh) * 2009-07-31 2011-03-23 夏普株式会社 频谱聚合系统中的自适应重传方法和用户设备
CN102625432A (zh) * 2011-01-28 2012-08-01 华为技术有限公司 一种非连续接收的方法和装置

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016070702A1 (fr) * 2014-11-06 2016-05-12 电信科学技术研究院 Procédé, dispositif et système de programmation de canaux de données
US10271344B2 (en) 2014-11-06 2019-04-23 China Academy Of Telecommunications Technology Data channel scheduling method, device and system
CN108418659A (zh) * 2017-02-10 2018-08-17 中兴通讯股份有限公司 一种数据传输方法、装置及相关设备
WO2019153125A1 (fr) * 2018-02-06 2019-08-15 Oppo广东移动通信有限公司 Procédé et dispositif de transmission de données et support d'informations informatique
US11804928B2 (en) 2018-02-06 2023-10-31 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Data transmission method, device and computer storage medium
US11690132B2 (en) * 2019-09-03 2023-06-27 Qualcomm Incorporated Medium access control-control element (MAC-CE) communication

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