WO2018171784A1 - 一种数据传输方法及装置 - Google Patents
一种数据传输方法及装置 Download PDFInfo
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- WO2018171784A1 WO2018171784A1 PCT/CN2018/080388 CN2018080388W WO2018171784A1 WO 2018171784 A1 WO2018171784 A1 WO 2018171784A1 CN 2018080388 W CN2018080388 W CN 2018080388W WO 2018171784 A1 WO2018171784 A1 WO 2018171784A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
- H04L5/0055—Physical resource allocation for ACK/NACK
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- 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
- H04L1/1829—Arrangements specially adapted for the receiver end
- H04L1/1854—Scheduling and prioritising arrangements
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- 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
- H04L1/1829—Arrangements specially adapted for the receiver end
- H04L1/1861—Physical mapping arrangements
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- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
Definitions
- the present application relates to the field of mobile communications, and in particular, to a data transmission method and apparatus in a time division duplex system.
- a major feature of the 5G communication system over the 4G communication system is the addition of support for Ultra-Reliable and Low Latency Communication (URLLC).
- URLLC Ultra-Reliable and Low Latency Communication
- the user plane delay requirement of the URLLC service is 0.5 ms for both uplink and downlink. The above requirements only apply when the base station and the terminal are not in Discontinuous Reception (DRX). It should be pointed out that the above performance indicators are only typical values.
- the specific URLLC service may have different requirements for delay. For example, some extremely demanding industrial controls require an end-to-end delay of 0.25 ms.
- the URLLC service has strict requirements on the user's delay, and how to reduce the delay is a problem to be solved.
- the present application describes a data transmission method and apparatus in a time division duplex system.
- the embodiment of the present application provides a data transmission method in a time division duplex system, where the method includes: receiving, by a terminal device, a first downlink control information and a first downlink reference sent by a network device in a downlink control part.
- the first device receives the first data sent by the network device in the first downlink data part according to the first downlink control information; the terminal device is configured according to the first downlink reference signal and the first The data generating feedback information is sent by the terminal device to the network device in an uplink feedback part; the terminal device receiving, by the network device, the second downlink data part, according to the first downlink control information, The second data; wherein the downlink control part, the first downlink data part, the uplink feedback part, and the second downlink data part constitute a first time unit; the first time unit is in time series The downlink control part, the first downlink data part, the uplink feedback part, and the second downlink data part are sequentially included.
- the first data is different from the second data.
- the first data and the second data comprise a first transport block.
- the first time unit includes one subframe.
- the method further includes: the terminal device receiving uplink feedback part configuration information from the network device, where the uplink feedback part configuration information indicates a time frequency of the uplink feedback part Resource location.
- the first time unit includes M OFDM symbols, and M is a positive integer;
- the embodiment of the present application provides a data transmission method in another time division duplex system, where the method includes: the network device sends the first downlink control information and the first downlink reference to the terminal device in the downlink control part.
- the network device sends the first data to the terminal device in the first downlink data portion according to the first downlink control information; the network device receives the feedback information sent by the terminal device in the uplink feedback portion; Transmitting, by the network device, the second data to the terminal device in the second downlink data part according to the first downlink control information, where the downlink control part, the first downlink data part, and the uplink feedback And the second downlink data part forms a first time unit; the first time unit sequentially includes the downlink control part, the first downlink data part, the uplink feedback part, and the first The second downlink data part.
- the first data is different from the second data.
- the first data and the second data comprise a first transport block.
- the first time unit includes one subframe.
- the method further includes: the network device sending uplink feedback part configuration information to the terminal device, where the uplink feedback part configuration information indicates a time frequency of the uplink feedback part Resource location.
- the first time unit includes M OFDM symbols, and M is a positive integer;
- the network device determines, according to the feedback information, whether to retransmit the first data and the second data in a subsequent time unit of the first time unit. .
- the embodiment of the present application provides a data transmission method in a time division duplex system, where the method includes: the terminal device receives, according to the first downlink control information, the network device to send in the first downlink data portion.
- the first data is received by the terminal device in the downlink control part, where the second downlink control information and the first downlink reference signal are sent by the network device, and the terminal device is in the second downlink data according to the second downlink control information.
- receiving, by the terminal device, second data sent by the network device the terminal device generates feedback information according to the first downlink reference signal and the second data; and the terminal device sends feedback to the network device in an uplink feedback part.
- the first downlink data portion, the downlink control portion, the second downlink data portion, and the uplink feedback portion constitute a first time unit; the first time unit sequentially includes Describe a first downlink data portion, the downlink control portion, the second downlink data portion, and the uplink feedback portion.
- the method further includes: the terminal device receiving, by the downlink control part in a previous time unit of the first time unit, the first sent by the network device Downstream control information.
- the method further includes: the terminal device receiving, according to the second downlink control information, a first downlink data portion of a subsequent time unit of the first time unit.
- the third data sent by the network device.
- the second data is different from the third data.
- the second data and the third data comprise a first transport block.
- the first time unit includes one subframe.
- the method further includes: the terminal device receiving downlink control part configuration information from the network device, where the downlink control part configuration information indicates a time frequency of the downlink control part Resource location.
- the first time unit includes M OFDM symbols, and M is a positive integer;
- the embodiment of the present application provides a data transmission method in a time division duplex system, where the method includes: the network device sends the first downlink data part to the terminal device according to the first downlink control information. a first data; the network device sends the second downlink control information and the first downlink reference signal to the terminal device in the downlink control part; the network device sends the second downlink data part to the second downlink data part according to the second downlink control information
- the terminal device sends the second data; the network device receives the feedback information sent by the terminal device in the uplink feedback part, where the first downlink data part, the downlink control part, and the second downlink data
- the uplink feedback part forms a first time unit; the first time unit sequentially includes the first downlink data part, the downlink control part, the second downlink data part, and the uplink in sequence Feedback section.
- the method further includes: the network device sending the first downlink to the network device in a downlink control part in a previous time unit of the first time unit Line control information.
- the method further includes: the network device, according to the second downlink control information, in a first downlink data part of a subsequent time unit of the first time unit The network device sends the third data.
- the second data is different from the third data.
- the second data and the third data comprise a first transport block.
- the first time unit includes one subframe.
- the method further includes: the network device sending downlink control part configuration information to the terminal device, where the downlink control part configuration information indicates a time frequency of the downlink control part Resource location.
- the first time unit includes M OFDM symbols, and M is a positive integer;
- the network device determines, according to the feedback information, whether to retransmit the second data and the third data.
- the embodiment of the present application provides a data transmission device in a time division duplex system, which may be a terminal device or a chip in the terminal device.
- the apparatus can include a processing unit and a transceiver unit.
- the processing unit may be a processor
- the transceiver unit may be a transceiver
- the terminal device may further include a storage unit, the storage unit may be a memory; the storage unit is configured to store an instruction, the processing The unit executes the instructions stored in the storage unit, so that the terminal device performs the first aspect, the third aspect, any one of the possible implementation manners of the first aspect, or the method in any one of the possible implementation manners of the third aspect .
- the processing unit may be a processor, the transceiver unit may be an input/output interface, a pin or a circuit, etc.; the processing unit executes instructions stored by the storage unit to make the terminal
- the device performs the first aspect, the third aspect, any one of the possible implementation manners of the first aspect, or the method in any one of the possible implementations of the third aspect
- the storage unit may be a storage unit in the chip (for example , a register, a cache, etc., may also be a memory unit (eg, a read only memory, a random access memory, etc.) located outside the chip within the terminal device.
- an embodiment of the present application provides a data transmission device in a time division duplex system, which may be a network device or a chip in a network device.
- the apparatus can include a processing unit and a transceiver unit.
- the processing unit may be a processor, and the transceiver unit may be a transceiver;
- the network device may further include a storage unit, the storage unit may be a memory; the storage unit is configured to store an instruction, the processing The unit executes the instructions stored in the storage unit, so that the network device performs the second aspect, the fourth aspect, any one of the possible implementation manners of the second aspect, or the method in any one of the possible implementation manners of the fourth aspect. .
- the processing unit may be a processor, the transceiver unit may be an input/output interface, a pin or a circuit, etc.; the processing unit executes instructions stored by the storage unit to make the network
- the storage unit may be a storage unit in the chip (for example , a register, a cache, etc., may also be a memory unit (eg, a read only memory, a random access memory, etc.) located outside the chip within the network device.
- an embodiment of the present application provides a data transmission apparatus in a time division duplex system, characterized in that the apparatus includes a memory and a processor, where the memory stores an instruction, when the instruction is executed by the processor, The apparatus performs the first aspect, the third aspect, any one of the possible implementations of the first aspect, or the method of any one of the possible implementations of the third aspect.
- the device can be a chip system.
- an embodiment of the present application provides a data transmission apparatus in a time division duplex system, characterized in that the apparatus includes a memory and a processor, where the memory stores an instruction, when the instruction is executed by the processor, The apparatus performs the method of the second aspect, the fourth aspect, any one of the possible implementations of the second aspect, or any one of the possible implementations of the fourth aspect.
- the device can be a chip system.
- the embodiment of the present application provides a communication system, where the communication system includes the terminal device in the fifth aspect and the network device in the sixth aspect.
- the embodiment of the present application provides a computer readable storage medium, configured to store a computer program, where the computer program is used to execute the first aspect, the second aspect, the third aspect, the fourth aspect, and the first aspect. Any of the possible implementations, any possible implementation of the second aspect, any possible implementation of the third aspect, or instructions of the method of any of the possible implementations of the fourth aspect.
- an embodiment of the present application provides a program product, the program product comprising a computer program (ie, an execution instruction), the computer program being stored in a readable storage medium.
- At least one processor of the communication device can read the computer program from a readable storage medium, the at least one processor executing the computer program causing the communication device to perform the first aspect, the second aspect, the third aspect, the fourth aspect, the first Any of the possible implementations of the aspect, any possible implementation of the second aspect, any possible implementation of the third aspect, or a method of any possible implementation of the fourth aspect.
- the network device can select whether to perform data retransmission based on the coarse feedback, thereby ensuring that the data can be retransmitted. As soon as possible, reducing the transmission delay.
- FIG. 1 is a schematic diagram of a network architecture applied in an embodiment of the present application.
- FIG. 2 is a flow chart of one embodiment of a data transmission method in a time division duplex system provided by the present application
- FIG. 3 is a schematic diagram of an embodiment of a TDD frame structure provided by the present application.
- FIG. 4 is a structural diagram of an embodiment of a terminal device provided by the present application.
- FIG. 5 is a structural diagram of another embodiment of a terminal device provided by the present application.
- FIG. 6 is a structural diagram of an embodiment of a network device provided by the present application.
- FIG. 7 is a structural diagram of another embodiment of a network device provided by the present application.
- FIG. 8 is a flow chart of another embodiment of a data transmission method in a time division duplex system provided by the present application.
- FIG. 9 is a schematic diagram of another embodiment of a TDD frame structure provided by the present application.
- FIG. 10 is a structural diagram of still another embodiment of a terminal device provided by the present application.
- FIG. 11 is a structural diagram of still another embodiment of a terminal device provided by the present application.
- FIG. 12 is a structural diagram of still another embodiment of a network device provided by the present application.
- FIG. 13 is a structural diagram of still another embodiment of a network device provided by the present application.
- FIG. 1 shows a communication system 100 to which an embodiment of the present application is applied.
- Communication system 100 can include at least one network device 110 and a plurality of terminal devices 120 located within the coverage of network device 110.
- FIG. 1 exemplarily shows one network device and two terminal devices.
- the communication system 100 may include multiple network devices and may include other numbers of terminal devices within the coverage of each network device. This example does not limit this.
- the wireless communication system 100 may further include other network entities, such as a network controller, a mobility management entity, and the like.
- network entities such as a network controller, a mobility management entity, and the like.
- the embodiment of the present application is not limited thereto.
- the communication system used in the embodiments of the present application may be a Global System of Mobile communication (GSM) system, a Code Division Multiple Access (CDMA) system, or a Wideband Code Division Multiple Access (Wideband Code Division Multiple Access).
- GSM Global System of Mobile communication
- CDMA Code Division Multiple Access
- Wideband Code Division Multiple Access Wideband Code Division Multiple Access
- WCDMA Wideband Code Division Multiple Access
- GPRS General Packet Radio Service
- LTE Long Term Evolution
- FDD Frequency Division Duplex
- TDD Time Division duplex
- UMTS Universal Mobile Telecommunication System
- NR 5G New Radio
- OFDM Orthogonal Frequency-Division Multiplexing
- the network device involved in the embodiment of the present application may be used to provide a wireless communication function for the terminal device.
- the network device may include various forms of macro base stations, micro base stations (also referred to as small stations), relay stations, access points, and the like.
- the network device may be a Base Transceiver Station (BTS) in GSM or CDMA, or may be a base station (NodeB, NB) in WCDMA, or may be an evolved Node B (eNB) in LTE. Or e-NodeB), and may be the corresponding device gNB in the 5G network.
- BTS Base Transceiver Station
- NodeB NodeB
- eNB evolved Node B
- e-NodeB evolved Node B
- the foregoing apparatus for providing a wireless communication function for a terminal device is collectively referred to as a network device.
- the terminal device involved in the embodiment of the present application may also be referred to as a user equipment (User Equipment, UE), a mobile station (Mobile Station, MS), a mobile terminal (Mobile Terminal), etc., and the terminal device may be wirelessly accessed.
- the Radio Access Network (RAN) communicates with one or more core networks.
- the terminal device may be a mobile phone (or “cellular” phone), a computer with a mobile terminal, etc., for example, the terminal device may also be Portable, pocket, handheld, computer built-in or in-vehicle mobile devices that exchange language and/or data with a wireless access network.
- the embodiment of the present application does not specifically limit it.
- the network architecture and the service scenario described in the embodiments of the present application are for the purpose of more clearly illustrating the technical solutions of the embodiments of the present application, and do not constitute a limitation of the technical solutions provided by the embodiments of the present application.
- the technical solutions provided by the embodiments of the present application are equally applicable to similar technical problems.
- the scheduled time unit is reduced from 1 ms to 0.125 ms, which can be achieved by introducing mini-slots, each mini-slot containing several OFDM symbols, wherein the number of OFDM symbols included is less than the OFDM symbols contained in one slot.
- Another method is to feedback the data transmission or reception of the terminal device as soon as possible to ensure that the data retransmission or new transmission can be performed as soon as possible.
- a new subframe type "self-contained subframe" is introduced to support back-to-back transmission of data.
- downlink data of the current subframe may be fed back at the end of the subframe, and the network device determines to perform weighting in the next frame according to the result of the acknowledgement (ACK), negative acknowledgement (NACK), and NACK feedback. Pass or new pass.
- the above-described continuous transmission based on self-contained subframes has extremely high requirements on the processing capabilities of network devices and terminal devices.
- the terminal device needs to start data demodulation and decoding after receiving downlink data and generate a feedback signal to feed back ACK/NACK at the end of the subframe; correspondingly, the network device needs to process as soon as possible after receiving the ACK/NACK, and in the next frame. The beginning of the decision determines whether to retransmit the last scheduled data.
- a transmission method based on coarse feedback can be used, that is, the terminal device feeds back to the base station based on the intermediate result of data reception instead of the final result of data-based demodulation decoding.
- the intermediate result of the above data reception may be in various manners, such as receiving the control channel of the user equipment, channel estimation, post-processing equivalent signal to interference and noise ratio (SINR), and soft information after MIMO equalization.
- SINR signal to interference and noise ratio
- the signal to interference plus noise ratio (SINR) on the demodulation reference signal can be calculated, and then Compared with the modulation and coding mode adopted by the current data transmission of the user, the probability of correct reception of the user data can be estimated. If the probability is greater than one threshold, the user feeds back ACK; otherwise, the user feeds back NACK.
- SINR signal to interference plus noise ratio
- the requirement for the processing capability of the user equipment can be correspondingly reduced, that is, the probability of quickly obtaining the estimation result and feeding back to the base station is greatly increased, and at the same time, the feedback is timely. This also increases the processing delay for the base station side.
- the basic steps of the foregoing coarse feedback-based transmission mode are as follows: the terminal device generates coarse feedback based on the downlink received control and part of the data, and quickly feeds back to the network device; the network device can further select to perform data weighting in the next scheduling period based on the coarse feedback. The terminal device will continue to receive data and demodulate and decode, and feed back the final result of data reception.
- the network device starts to listen to the control channel at the beginning of each scheduling period, and receives the data portion in the subsequent part, even if the user equipment can quickly get rough feedback. As a result, it is still necessary to wait until the uplink is sent to the base station, such as the end portion of each subframe, that is, the result of the coarse feedback cannot be quickly transmitted to the base station.
- TDD Time-Division Duplexing
- an embodiment of a data transmission method in a time division duplex system includes S210, S220, S230, S240, and S250.
- the network device sends the first downlink control information and the first downlink reference signal to the terminal device in the downlink control part.
- the first downlink control information includes at least scheduling information of the downlink data transmission, and specifically includes time-frequency resource allocation, modulation and coding mode, data transmission mode, and the like of the downlink data.
- the first downlink reference signal is used at least for channel estimation of the terminal device, and the result of the channel estimation may be used by the first downlink control information and/or the first downlink control information Demodulation of the downlink data channel.
- S220 The network device sends the first data to the terminal device in the first downlink data part according to the first downlink control information.
- the first downlink control information includes at least scheduling information of the first data.
- S230 The terminal device generates feedback information according to the first downlink reference signal and the first data.
- the terminal device according to the probability that the first downlink reference signal and the first data estimation data are correctly received, if the probability is greater than a threshold (or if the probability is greater than or equal to a threshold),
- the feedback information is ACK, otherwise the feedback information is NACK.
- S240 The terminal device sends the feedback information to the network device in an uplink feedback part.
- the network device sends the second data to the terminal device in the second downlink data part according to the first downlink control information.
- the first downlink control information includes at least scheduling information of the second data.
- the downlink control part, the first downlink data part, the uplink feedback part, and the second downlink data part constitute a first time unit; the first time unit is sequentially sequenced
- the downlink control part, the first downlink data part, the uplink feedback part, and the second downlink data part are included.
- the downlink control part is located at the beginning of the first time unit, the first downlink data part is located behind the downlink control part, and the uplink feedback part is located in the first downlink.
- GAP guard interval
- the first time unit and one or more other time units constitute one radio frame, and the other time units may have the same structure as the first time unit, may have different structures, or may The part has the same structure as the first time unit, and the rest has a different structure, which is not limited in this application.
- the first time unit may also be referred to as a scheduling period, which may be any time unit in the radio frame in time series, which is not limited in this application.
- the terminal device generates the feedback information based on the received first downlink reference signal and the first data, and sends the feedback information to the second data before receiving the second information.
- the network device enables the network device to select whether to retransmit the first data and the second data based on the feedback information, to ensure that data retransmission can be performed as soon as possible, thereby reducing transmission delay.
- the requirement for the processing capability of the terminal device in this manner can be correspondingly reduced, and the processing delay space reserved for the network device is correspondingly increased due to the timely feedback.
- the first data is different from the second data.
- the first data and the second data comprise different original bit information, that is to say the second data is not a retransmission of the first data.
- the first data may be transport block 1, and the second data may be transport block 2; or, the first data may be transport block 1 and partial transport block 2, and the second data may be The remaining portion transports block 2 (or the remaining portion of transport block 2 and transport block 3); alternatively, the first data may be a partial transport block 1, and the second data may be the remaining portion of transport block 1 and a portion of transport block 2.
- the first data and the second data form a first transport block (Transmit Block, TB).
- Transport Block TB
- the first transport block is a transport block obtained by the first original information bit block after the code block segmentation, the code block check bit addition, the channel coding interleave, the code block concatenation, and the check bit addition.
- the network device divides the first transport block into two parts, transmits the first part as the first data, and transmits the second part as the second data.
- the first time unit includes one subframe.
- the subframe may be a slot, a mini-slot, a self-contained subframe, or the like.
- the embodiment further includes S260.
- the network device sends uplink feedback part configuration information to the terminal device, where the uplink feedback part configuration information indicates a time-frequency resource location of the uplink feedback part.
- the uplink feedback portion is located at an intermediate position of the first time unit.
- the uplink feedback portion may include a sixth OFDM symbol, a seventh OFDM symbol, or an eighth OFDM symbol in the first time unit.
- the uplink feedback portion may include a third OFDM symbol or a fourth OFDM symbol in the following OFDM symbols in the first time unit.
- the location of the uplink feedback part in the first time unit may be adjusted according to requirements, for example, if more processing time needs to be left for the terminal device, the uplink feedback part may be moved backward. Position (ie, increasing the number of OFDM symbols located in the first time unit before the uplink feedback portion, and reducing the number of OFDM symbols located after the uplink feedback portion), if necessary, to make the network device Receiving the feedback faster, the position of the uplink feedback part may be forwarded (ie, the number of OFDM symbols located in the first time unit before the uplink feedback part is decreased, and after the uplink feedback part is located) The number of OFDM symbols increases).
- this embodiment further includes S270.
- the network device determines, according to the feedback information, whether to retransmit the first data and the second data in a subsequent time unit of the first time unit.
- the network device determines that the first data and the second data are not retransmitted in a subsequent time unit of the first time unit; if the feedback information For NACK, the network device determines to retransmit the first data and the second data at a later time unit of the first time unit.
- the present application provides an embodiment of a terminal device and a network device, where the terminal device and the network device can respectively perform the steps in the foregoing method embodiments.
- an embodiment of a terminal device includes a sending unit 310, a receiving unit 320, and a processing unit 330.
- the receiving unit 320 is configured to: receive, by the downlink control part, first downlink control information and a first downlink reference signal that are sent by the network device.
- the receiving unit 320 is further configured to: receive the first data sent by the network device in the first downlink data part according to the first downlink control information.
- the processing unit 330 is configured to: generate feedback information according to the first downlink reference signal and the first data.
- the sending unit 310 is configured to: send the feedback information to the network device in an uplink feedback part.
- the receiving unit 320 is further configured to: receive the second data sent by the network device in the second downlink data part according to the first downlink control information.
- the downlink control part, the first downlink data part, the uplink feedback part, and the second downlink data part constitute a first time unit; the first time unit is sequentially sequenced
- the downlink control part, the first downlink data part, the uplink feedback part, and the second downlink data part are included.
- the first data is different from the second data.
- the first data and the second data form a first transport block.
- the first time unit includes one subframe.
- the receiving unit 320 is further configured to: receive uplink feedback part configuration information from the network device, where the uplink feedback part configuration information indicates a time-frequency resource location of the uplink feedback part.
- another embodiment of the terminal device provided by the present application includes a transmitter 410, a receiver 420, and a processor 430.
- the receiver 420 is configured to: receive, by the downlink control part, first downlink control information and a first downlink reference signal that are sent by the network device.
- the receiver 420 is further configured to: receive the first data sent by the network device in the first downlink data part according to the first downlink control information.
- the processor 430 is configured to: generate feedback information according to the first downlink reference signal and the first data.
- the transmitter 410 is configured to: send the feedback information to the network device in an uplink feedback part.
- the receiver 420 is further configured to: receive the second data sent by the network device in the second downlink data part according to the first downlink control information.
- the downlink control part, the first downlink data part, the uplink feedback part, and the second downlink data part constitute a first time unit; the first time unit is sequentially sequenced
- the downlink control part, the first downlink data part, the uplink feedback part, and the second downlink data part are included.
- the first data is different from the second data.
- the first data and the second data form a first transport block.
- the first time unit includes one subframe.
- the receiver 420 is further configured to: receive uplink feedback part configuration information from the network device, where the uplink feedback part configuration information indicates a time-frequency resource location of the uplink feedback part.
- an embodiment of a network device includes a sending unit 510 and a receiving unit 520.
- the sending unit 510 is configured to: send, by the downlink control part, the first downlink control information and the first downlink reference signal to the terminal device.
- the sending unit 510 is further configured to: send the first data to the terminal device in the first downlink data part according to the first downlink control information.
- the receiving unit 520 is configured to: receive, in an uplink feedback part, feedback information sent by the terminal device.
- the sending unit 510 is further configured to: send the second data to the terminal device in the second downlink data part according to the first downlink control information.
- the downlink control part, the first downlink data part, the uplink feedback part, and the second downlink data part constitute a first time unit; the first time unit is sequentially sequenced
- the downlink control part, the first downlink data part, the uplink feedback part, and the second downlink data part are included.
- the first data is different from the second data.
- the first data and the second data form a first transport block.
- the first time unit includes one subframe.
- the sending unit 510 is further configured to: send uplink feedback part configuration information to the terminal device, where the uplink feedback part configuration information indicates a time-frequency resource location of the uplink feedback part.
- the embodiment further includes a processing unit 530.
- the processing unit 530 is further configured to: determine, according to the feedback information, whether to retransmit the first data and the second data in a subsequent time unit of the first time unit.
- another embodiment of a network device provided by the present application includes a transmitter 610 and a receiver 620.
- the transmitter 610 is configured to: send, by the downlink control part, the first downlink control information and the first downlink reference signal to the terminal device.
- the transmitter 610 is further configured to: send the first data to the terminal device in the first downlink data part according to the first downlink control information.
- the receiver 620 is configured to: receive, in an uplink feedback part, feedback information sent by the terminal device.
- the transmitter 610 is further configured to: send the second data to the terminal device in the second downlink data part according to the first downlink control information.
- the downlink control part, the first downlink data part, the uplink feedback part, and the second downlink data part constitute a first time unit; the first time unit is sequentially sequenced
- the downlink control part, the first downlink data part, the uplink feedback part, and the second downlink data part are included.
- the first data is different from the second data.
- the first data and the second data form a first transport block.
- the first time unit includes one subframe.
- the transmitter 610 is further configured to: send, to the terminal device, uplink feedback part configuration information, where the uplink feedback part configuration information indicates a time-frequency resource location of the uplink feedback part.
- the embodiment further includes a processor 630.
- the processor 630 is configured to: determine, according to the feedback information, whether to retransmit the first data and the second data in a later time unit of the first time unit.
- another embodiment of a data transmission method in a time division duplex system includes S710, S720, S730, S740, and S750.
- the network device sends the first data to the terminal device in the first downlink data part according to the first downlink control information.
- the first downlink control information includes at least scheduling information of the downlink data transmission, and specifically includes time-frequency resource allocation, modulation and coding mode, data transmission mode, and the like of the downlink data.
- the first downlink control information includes at least scheduling information of the first data.
- the network device sends the second downlink control information and the first downlink reference signal to the terminal device in a downlink control part.
- the second downlink control information includes at least scheduling information of the downlink data transmission, and specifically includes time-frequency resource allocation, modulation and coding mode, data transmission mode, and the like of the downlink data.
- the first downlink reference signal is used at least for channel estimation of the terminal device, and the result of the channel estimation may be used by the first downlink control information and/or the first downlink control information Demodulation of the downlink data channel.
- the network device sends the second data to the terminal device in the second downlink data part according to the second downlink control information.
- the second downlink control information includes at least scheduling information of the second data.
- the terminal device generates feedback information according to the first downlink reference signal and the second data.
- the terminal device according to the probability that the first downlink reference signal and the first data estimation data are correctly received, if the probability is greater than a threshold (or if the probability is greater than or equal to a threshold),
- the feedback information is ACK, otherwise the feedback information is NACK.
- the terminal device sends the feedback information to the terminal device in an uplink feedback part.
- the first downlink data part, the downlink control part, the second downlink data part, and the uplink feedback part form a first time unit; the first time unit is sequentially sequenced
- the first downlink data portion, the downlink control portion, the second downlink data portion, and the uplink feedback portion are included.
- the first downlink data portion is located at the beginning of the first time unit
- the downlink control portion is located behind the first downlink data portion
- the first downlink data portion is located After the downlink control part
- the uplink feedback part is located at the end of the first time unit, and a guard interval exists between the uplink feedback part and the second downlink data part.
- the first time unit and one or more other time units constitute one radio frame, and the other time units may have the same structure as the first time unit, may have different structures, or may The part has the same structure as the first time unit, and the rest has a different structure, which is not limited in this application.
- the first time unit may also be referred to as a scheduling period, which may be any time unit in the radio frame in time series, which is not limited in this application.
- the terminal device generates the feedback information based on the received first downlink reference signal and the second data, and the current time unit sends the feedback information to the network device, Enabling the network device to select whether to retransmit the second data based on the feedback information, to ensure that retransmission of data can be performed as soon as possible, thereby reducing transmission delay, and further, the manner is to the terminal device.
- the requirements of the processing capability can be correspondingly reduced, and the processing delay space reserved for the network device is correspondingly increased due to the timely feedback.
- this embodiment further includes S760.
- the network device sends the first downlink control information to the network device in a downlink control part in a previous time unit of the first time unit.
- this embodiment further includes S770.
- the network device sends third data to the network device according to the second downlink control information in a first downlink data part of a subsequent time unit of the first time unit.
- the second data is different from the third data.
- the second data and the third data contain different original bit information, that is, the third data is not a retransmission of the second data.
- the second data may be transport block 1, and the third data may be transport block 2; or, the second data may be transport block 1 and partial transport block 2, and the third data may be The remaining portion transports block 2 (or the remaining portion of transport block 2 and transport block 3); alternatively, the second data may be a partial transport block 1, and the third data may be the remaining portion of transport block 1 and part of transport block 2.
- the second data and the third data form a first transport block.
- the first transport block is a transport block obtained by the first original information bit block after the code block segmentation, the code block check bit addition, the channel coding interleave, the code block concatenation, and the check bit addition.
- the network device divides the first transport block into two parts, transmits the first part as the first data, and transmits the second part as the second data.
- the first time unit includes one subframe.
- the subframe may be a slot, a mini-slot, a self-contained subframe, or the like.
- this embodiment further includes S780.
- the network device sends downlink control part configuration information to the terminal device, where the downlink control part configuration information indicates a time-frequency resource location of the downlink control part.
- the downlink control portion is located at an intermediate position of the first time unit.
- the downlink control portion may include a sixth OFDM symbol, a seventh OFDM symbol, or an eighth OFDM symbol in the first time unit.
- the downlink control portion may include a third OFDM symbol or a fourth OFDM symbol of the following OFDM symbols in the first time unit.
- the location of the downlink control part in the first time unit may be adjusted according to requirements, for example, if more processing time needs to be left for the terminal device, the downlink control part may be moved backward.
- Position ie, increasing the number of OFDM symbols located in the first time unit before the downlink control portion, and reducing the number of OFDM symbols located after the downlink control portion
- the position of the downlink control part may be forwarded (ie, the number of OFDM symbols located in the first time unit before the downlink control part is decreased, and after the downlink control part is located) The number of OFDM symbols increases).
- this embodiment further includes S790.
- the network device determines, according to the feedback information, whether to retransmit the second data and the third data.
- the network device determines not to retransmit the second data and the third data; if the feedback information is NACK, the network device determines to The second data and the third data are retransmitted.
- S760 and S780 is not limited to that shown in FIG. 8, and the two may be interchanged sequentially or simultaneously; the order of S770 and S790 is not limited to that shown in FIG. 8, both of which may be Swap the order or at the same time.
- the present application provides an embodiment of a terminal device and a network device, where the terminal device and the network device can respectively perform the steps in the foregoing method embodiments.
- still another embodiment of the terminal device provided by the present application includes a sending unit 810, a receiving unit 820, and a processing unit 830.
- the receiving unit 820 is configured to: receive the first data sent by the network device in the first downlink data part according to the first downlink control information.
- the receiving unit 820 is further configured to: receive, by the downlink control part, second downlink control information and a first downlink reference signal that are sent by the network device.
- the receiving unit 820 is further configured to: receive the second data sent by the network device in the second downlink data part according to the second downlink control information.
- the processing unit 830 is configured to: generate feedback information according to the first downlink reference signal and the second data.
- the sending unit 810 is configured to: send feedback information to the network device in an uplink feedback part.
- the first downlink data part, the downlink control part, the second downlink data part, and the uplink feedback part form a first time unit; the first time unit is sequentially sequenced
- the first downlink data portion, the downlink control portion, the second downlink data portion, and the uplink feedback portion are included.
- the receiving unit 820 is further configured to: receive, by the terminal device, the first downlink control information that is sent by the network device in a downlink control part in a previous time unit of the first time unit.
- the receiving unit 820 is further configured to: receive, by the terminal device, the network device to send, according to the second downlink control information, in a first downlink data part of a subsequent time unit of the first time unit.
- the third data is further configured to: receive, by the terminal device, the network device to send, according to the second downlink control information, in a first downlink data part of a subsequent time unit of the first time unit.
- the second data is different from the third data.
- the second data and the third data form a first transport block.
- the first time unit includes one subframe.
- the receiving unit 820 is further configured to: receive downlink control part configuration information from the network device, where the downlink control part configuration information indicates a time-frequency resource location of the downlink control part.
- another embodiment of the terminal device provided by the present application includes a sending unit 910, a receiving unit 920, and a processing unit 930.
- the receiving unit 920 is configured to: receive the first data sent by the network device in the first downlink data part according to the first downlink control information.
- the receiving unit 920 is further configured to: receive, by the downlink control part, second downlink control information and a first downlink reference signal that are sent by the network device.
- the receiving unit 920 is further configured to: receive the second data sent by the network device in the second downlink data part according to the second downlink control information.
- the processing unit 930 is configured to: generate feedback information according to the first downlink reference signal and the second data.
- the sending unit 910 is configured to: send feedback information to the network device in an uplink feedback part.
- the first downlink data part, the downlink control part, the second downlink data part, and the uplink feedback part form a first time unit; the first time unit is sequentially sequenced
- the first downlink data portion, the downlink control portion, the second downlink data portion, and the uplink feedback portion are included.
- the receiving unit 920 is further configured to: receive, by the terminal device, the first downlink control information that is sent by the network device in a downlink control part in a previous time unit of the first time unit.
- the receiving unit 920 is further configured to: receive, by the terminal device, the network device to send, according to the second downlink control information, in a first downlink data part of a subsequent time unit of the first time unit.
- the third data is further configured to: receive, by the terminal device, the network device to send, according to the second downlink control information, in a first downlink data part of a subsequent time unit of the first time unit.
- the second data is different from the third data.
- the second data and the third data form a first transport block.
- the first time unit includes one subframe.
- the receiver 920 is further configured to: receive downlink control part configuration information from the network device, where the downlink control part configuration information indicates a time-frequency resource location of the downlink control part.
- still another embodiment of the network device provided by the present application includes a sending unit 1010 and a receiving unit 1020.
- the sending unit 1010 is configured to: send the first data to the terminal device in the first downlink data part according to the first downlink control information.
- the sending unit 1010 is further configured to: send, by the downlink control part, the second downlink control information and the first downlink reference signal to the terminal device.
- the sending unit 1010 is further configured to: send the second data to the terminal device in the second downlink data part according to the second downlink control information.
- the receiving unit 1020 is configured to: receive, in an uplink feedback part, feedback information sent by the terminal device.
- the first downlink data part, the downlink control part, the second downlink data part, and the uplink feedback part form a first time unit; the first time unit is sequentially sequenced
- the first downlink data portion, the downlink control portion, the second downlink data portion, and the uplink feedback portion are included.
- the sending unit 1010 is further configured to: send, by using a downlink control part in a previous time unit of the first time unit, the first downlink control information to the network device.
- the sending unit 1010 is further configured to: send, according to the second downlink control information, third data to the network device in a first downlink data part of a subsequent time unit of the first time unit.
- the second data is different from the third data.
- the second data and the third data form a first transport block.
- the first time unit includes one subframe.
- the sending unit 1010 is further configured to: send downlink control part configuration information to the terminal device, where the downlink control part configuration information indicates a time-frequency resource location of the downlink control part.
- the embodiment further includes a processing unit 1030.
- the processing unit 1030 is configured to: determine, according to the feedback information, whether to retransmit the second data and the third data.
- still another embodiment of the network device provided by the present application includes a transmitter 1110 and a receiver 1120.
- the transmitter 1110 is configured to: send the first data to the terminal device in the first downlink data part according to the first downlink control information.
- the transmitter 1110 is further configured to: send, by the downlink control part, the second downlink control information and the first downlink reference signal to the terminal device.
- the transmitter 1110 is further configured to: send the second data to the terminal device in the second downlink data part according to the second downlink control information.
- the receiver 1120 is configured to: receive, in an uplink feedback part, feedback information sent by the terminal device.
- the first downlink data part, the downlink control part, the second downlink data part, and the uplink feedback part form a first time unit; the first time unit is sequentially sequenced
- the first downlink data portion, the downlink control portion, the second downlink data portion, and the uplink feedback portion are included.
- the transmitter 1110 is further configured to: send, by using a downlink control part in a previous time unit of the first time unit, the first downlink control information to the network device.
- the transmitter 1110 is further configured to: send, according to the second downlink control information, third data to the network device in a first downlink data portion of a subsequent time unit of the first time unit.
- the second data is different from the third data.
- the second data and the third data form a first transport block.
- the first time unit includes one subframe.
- the transmitter 1130 is further configured to: send downlink control part configuration information to the terminal device, where the downlink control part configuration information indicates a time-frequency resource location of the downlink control part.
- the embodiment further includes a processor 1130.
- the processor 1130 is configured to: determine, according to the feedback information, whether to retransmit the second data and the third data.
- a person skilled in the art may understand that all or part of the steps of implementing the above embodiments may be completed by hardware, or may be instructed by a program to execute related hardware, and the program may be stored in a computer readable storage medium.
- the storage medium mentioned may be a read only memory, a magnetic disk or an optical disk or the like.
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Abstract
Description
Claims (27)
- 一种时分双工系统中的数据传输方法,其特征在于,所述方法包括:终端设备在下行控制部分接收网络设备发送的第一下行控制信息和第一下行参考信号;所述终端设备根据所述第一下行控制信息在第一下行数据部分接收所述网络设备发送的第一数据;所述终端设备根据所述第一下行参考信号和所述第一数据生成反馈信息;所述终端设备在上行反馈部分向所述网络设备发送所述反馈信息;所述终端设备根据所述第一下行控制信息在第二下行数据部分接收所述网络设备发送的第二数据;其中,所述下行控制部分、所述第一下行数据部分、所述上行反馈部分和所述第二下行数据部分组成第一时间单元;所述第一时间单元在时序上依次包括所述下行控制部分、所述第一下行数据部分、所述上行反馈部分和所述第二下行数据部分。
- 如权利要求1所述的方法,其特征在于,所述第一数据与所述第二数据不同。
- 如权利要求1或2所述的方法,其特征在于,所述第一数据和所述第二数据组成第一传输块。
- 如权利要求1至3任意一项所述的方法,其特征在于,所述第一时间单元包括一个子帧。
- 如权利要求1至4任意一项所述的方法,其特征在于,所述方法还包括:所述终端设备从所述网络设备接收上行反馈部分配置信息,所述上行反馈部分配置信息指示所述上行反馈部分的时频资源位置。
- 如权利要求1至5任意一项所述的方法,其特征在于:所述第一时间单元包括M个OFDM符号,M为正整数;所述上行反馈部分包括所述第一时间单元中的第N个OFDM符号,在N为偶数的情况下,N=M/2或N=M/2+1,在N为奇数的情况下,N=(M+1)/2。
- 一种时分双工系统中的数据传输方法,其特征在于,所述方法包括:网络设备在下行控制部分向终端设备发送第一下行控制信息和第一下行参考信号;所述网络设备根据所述第一下行控制信息在第一下行数据部分向所述终端设备发送第一数据;所述网络设备在上行反馈部分接收所述终端设备发送的反馈信息;所述网络设备根据所述第一下行控制信息在第二下行数据部分向所述终端设备发送第二数据;其中,所述下行控制部分、所述第一下行数据部分、所述上行反馈部分和所述第二下行数据部分组成第一时间单元;所述第一时间单元在时序上依次包括所述下行控制部分、所述第一下行数据部分、所述上行反馈部分和所述第二下行数据部分。
- 如权利要求7所述的方法,其特征在于,所述第一数据与所述第二数据不同。
- 如权利要求7或8所述的方法,其特征在于,所述第一数据和所述第二数据组成第 一传输块。
- 如权利要求7至9任意一项所述的方法,其特征在于,所述第一时间单元包括一个子帧。
- 如权利要求7至10任意一项所述的方法,其特征在于,所述方法还包括:所述网络设备向所述终端设备发送上行反馈部分配置信息,所述上行反馈部分配置信息指示所述上行反馈部分的时频资源位置。
- 如权利要求7至11任意一项所述的方法,其特征在于:所述第一时间单元包括M个OFDM符号,M为正整数;所述上行反馈部分包括所述第一时间单元中的第N个OFDM符号,在N为偶数的情况下,N=M/2或N=M/2+1,在N为奇数的情况下,N=(M+1)/2。
- 如权利要求7至12任意一项所述的方法,其特征在于,所述方法还包括:所述网络设备根据所述反馈信息确定是否在所述第一时间单元的后一个时间单元对所述第一数据和所述第二数据进行重传。
- 一种时分双工系统中的终端设备,其特征在于,所述装置包括:接收单元,用于在下行控制部分接收网络设备发送的第一下行控制信息和第一下行参考信号;所述接收单元还用于:根据所述第一下行控制信息在第一下行数据部分接收所述网络设备发送的第一数据;处理单元,用于根据所述第一下行参考信号和所述第一数据生成反馈信息;发送单元,用于在上行反馈部分向所述网络设备发送所述反馈信息;所述接收单元还用于:根据所述第一下行控制信息在第二下行数据部分接收所述网络设备发送的第二数据;其中,所述下行控制部分、所述第一下行数据部分、所述上行反馈部分和所述第二下行数据部分组成第一时间单元;所述第一时间单元在时序上依次包括所述下行控制部分、所述第一下行数据部分、所述上行反馈部分和所述第二下行数据部分。
- 如权利要求14所述的装置,其特征在于,所述第一数据与所述第二数据不同。
- 如权利要求14或15所述的装置,其特征在于,所述第一数据和所述第二数据组成第一传输块。
- 如权利要求14至16任意一项所述的装置,其特征在于,所述第一时间单元包括一个子帧。
- 如权利要求14至17任意一项所述的装置,其特征在于,所述接收单元还用于:从所述网络设备接收上行反馈部分配置信息,所述上行反馈部分配置信息指示所述上行反馈部分的时频资源位置。
- 如权利要求14至18任意一项所述的装置,其特征在于:所述第一时间单元包括M个OFDM符号,M为正整数;所述上行反馈部分包括所述第一时间单元中的第N个OFDM符号,在N为偶数的情况下,N=M/2或N=M/2+1,在N为奇数的情况下,N=(M+1)/2。
- 一种时分双工系统中的网络设备,其特征在于,所述装置包括:发送单元,用于在下行控制部分向终端设备发送第一下行控制信息和第一下行参考信号;所述发送单元还用于:根据所述第一下行控制信息在第一下行数据部分向所述终端设备发送第一数据;接收单元,用于在上行反馈部分接收所述终端设备发送的反馈信息;所述发送单元还用于:根据所述第一下行控制信息在第二下行数据部分向所述终端设备发送第二数据;其中,所述下行控制部分、所述第一下行数据部分、所述上行反馈部分和所述第二下行数据部分组成第一时间单元;所述第一时间单元在时序上依次包括所述下行控制部分、所述第一下行数据部分、所述上行反馈部分和所述第二下行数据部分。
- 如权利要求20所述的装置,其特征在于,所述第一数据与所述第二数据不同。
- 如权利要求20或21所述的装置,其特征在于,所述第一数据和所述第二数据组成第一传输块。
- 如权利要求20至22任意一项所述的装置,其特征在于,所述第一时间单元包括一个子帧。
- 如权利要求20至23任意一项所述的装置,其特征在于,所述发送单元还用于:所述网络设备向所述终端设备发送上行反馈部分配置信息,所述上行反馈部分配置信息指示所述上行反馈部分的时频资源位置。
- 如权利要求20至24任意一项所述的方法,其特征在于:所述第一时间单元包括M个OFDM符号,M为正整数;所述上行反馈部分包括所述第一时间单元中的第N个OFDM符号,在N为偶数的情况下,N=M/2或N=M/2+1,在N为奇数的情况下,N=(M+1)/2。
- 如权利要求20至25任意一项所述的装置,其特征在于,所述处理单元还用于:根据所述反馈信息确定是否在所述第一时间单元的后一个时间单元对所述第一数据和所述第二数据进行重传。
- 一种计算机可读存储介质,其特征在于,所述计算机可读存储介质存储有程序,所述程序使得通信设备执行根据权利要求1至13任意一项所述的方法。
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WO2016148878A1 (en) * | 2015-03-15 | 2016-09-22 | Qualcomm Incorporated | Self-contained time division duplex (tdd) subframe structure |
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CN101212249B (zh) * | 2006-12-29 | 2011-08-24 | 中兴通讯股份有限公司 | 一种提高tdd系统上行反馈能力的方法和系统 |
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CN102404801A (zh) * | 2010-09-17 | 2012-04-04 | 华为技术有限公司 | 一种数据传输反馈的方法与装置 |
CN102468940B (zh) * | 2010-11-12 | 2015-03-25 | 大唐移动通信设备有限公司 | 调度请求和ack/nack信息的传输方法及装置 |
US9814058B2 (en) * | 2015-05-15 | 2017-11-07 | Qualcomm Incorporated | Scaled symbols for a self-contained time division duplex (TDD) subframe structure |
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CN106301738B (zh) * | 2016-06-28 | 2020-04-07 | 宇龙计算机通信科技(深圳)有限公司 | 基于帧结构的通信方法 |
CN106059739B (zh) * | 2016-07-18 | 2019-06-18 | 珠海市魅族科技有限公司 | Harq反馈方法、harq反馈装置、基站及终端 |
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WO2016148878A1 (en) * | 2015-03-15 | 2016-09-22 | Qualcomm Incorporated | Self-contained time division duplex (tdd) subframe structure |
US20160330782A1 (en) * | 2015-05-04 | 2016-11-10 | Qualcomm Incorporated | Inter-node coordination for managing a modem processing pipeline |
CN107613568A (zh) * | 2016-07-12 | 2018-01-19 | 中兴通讯股份有限公司 | 一种信号传输方法及装置 |
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CN108631993B (zh) | 2021-02-23 |
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EP3591874A1 (en) | 2020-01-08 |
US11101964B2 (en) | 2021-08-24 |
BR112019019935A2 (pt) | 2020-04-22 |
US20200036499A1 (en) | 2020-01-30 |
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