WO2015114459A1 - Procédés et appareils pour rétroaction de transmission en liaison montante pour un ue de mtc - Google Patents

Procédés et appareils pour rétroaction de transmission en liaison montante pour un ue de mtc Download PDF

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Publication number
WO2015114459A1
WO2015114459A1 PCT/IB2015/000239 IB2015000239W WO2015114459A1 WO 2015114459 A1 WO2015114459 A1 WO 2015114459A1 IB 2015000239 W IB2015000239 W IB 2015000239W WO 2015114459 A1 WO2015114459 A1 WO 2015114459A1
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WIPO (PCT)
Prior art keywords
information
dci
mtc
sequence
format
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PCT/IB2015/000239
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English (en)
Inventor
Zhang Zhang
Yu Chen
Shin Horng Wong
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Alcatel Lucent
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Publication of WO2015114459A1 publication Critical patent/WO2015114459A1/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
    • H04L1/1607—Details of the supervisory signal
    • H04L1/1671—Details of the supervisory signal the supervisory signal being transmitted together with control information
    • 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
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0036—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the receiver
    • H04L1/0038—Blind format detection
    • 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
    • H04L1/08—Arrangements for detecting or preventing errors in the information received by repeating transmission, e.g. Verdan system
    • 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
    • H04L1/1607—Details of the supervisory signal
    • H04L1/1692—Physical properties of the supervisory signal, e.g. acknowledgement by energy bursts
    • 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
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • H04L1/1819—Hybrid protocols; Hybrid automatic repeat request [HARQ] with retransmission of additional or different redundancy
    • 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
    • H04L1/1864—ARQ related signaling
    • 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

Definitions

  • the present disclosure generally relates to the field of wireless communication, and more specifically, to methods and apparatuses for uplink (UL) transmission feedback for an MTC UE.
  • UL uplink
  • M2M communication or Machine Type Communication (MTC)
  • MTC Machine Type Communication
  • UEs User Equipments
  • Physical Downlink Control Channels carry Downlink Control Information (DCI) for one or more UEs.
  • the PDCCHs are time divisionally multiplexed with Physical Downlink Shared Channels (PDSCHs) for transmitting downlink (DL) data.
  • PDSCHs Physical Downlink Shared Channels
  • a UE performs blind detection on the control region of the PDCCH to search for whether there is PDCCH transmitted for it. Blind detection means attempting to decode the PDCCH with a corresponding Radio Network Temporary Identity (RNTI) of the UE. If it is correctly decoded, DCI for the UE is received and then corresponding messages may be received in the PDSCH.
  • RTI Radio Network Temporary Identity
  • PHICH Physical Hybrid ARQ Indicator Channel
  • the PHICH index is tied to the lowest Resource Block (RB) index of the Physical Uplink Shared Channel (PUSCH), which imposes some constraints on the eNB scheduler and makes it difficult to avoid collision.
  • RB Resource Block
  • PUSCH Physical Uplink Shared Channel
  • 3GPP usually minimises the number of channels to be enhanced and repetition on PHICH would require additional specifications to enhance PHICH.
  • Another alternative is to use UL grant as the feedback to indicate ACK/NACK.
  • the present disclosure proposes an efficient solution for UL transmission feedback for MTC UEs.
  • a method for UL transmission feedback for a MTC UE including constructing DCI information specific for the MTC UE, the DCI information including at least ACK or NACK information for the UL transmission of the MTC UE; and broadcasting the DCI information to all UEs served by the base station.
  • an apparatus for UL transmission feedback for a MTC UE in a base station including a DCI information constructing unit configured to construct DCI information specific for the MTC UE, the DCI information including at least ACK or NACK information for the UL transmission of the MTC UE; and a transmitting unit configured to broadcast the DCI information to all UEs served by the base station.
  • a method for UL transmission feedback for a MTC UE in a base station including constructing DCI information specific for the MTC UE including a first sequence or a second sequence different from the first sequence, wherein the first sequence is used to indicate ACK for UL transmission of the MTC UE and the second sequence is used to indicate NACK for UL transmission of the MTC UE; scrambling the DCI information with a RNTI of the MTC UE; and broadcasting the scrambled DCI information to all UEs served by the base station.
  • an apparatus for UL transmission feedback for a MTC UE in a base station including a DCI constructing unit configured to construct DCI information specific for the MTC UE including a first sequence or a second sequence different from the first sequence, wherein the first sequence is used to indicate ACK for UL transmission of the MTC UE and the second sequence is used to indicate NACK for UL transmission of the MTC UE; a scrambling unit configured to scramble the DCI information with a RNTI of the MTC UE; and a transmitting unit configured to broadcast the scrambled DCI information to all UEs served by the base station.
  • a method for receiving UL transmission feedback from a base station in a MTC UE including receiving a PDCCH broadcasted by the base station; descrambling the PDCCH with a RNTI of the MTC UE to obtain DCI information for the MTC UE; and correlating the DCI information with the first sequence and the second sequence to determine whether the DCI information includes ACK or NACK information for UL transmission of the MTC UE.
  • an apparatus for receiving UL transmission feedback from a base station in a MTC UE including a receiving unit configured to receive a PDCCH broadcasted by the base station; a descrambling unit configured to descramble the PDCCH with a RNTI of the MTC UE to obtain DCI information for the MTC UE; and a correlating unit configured to correlate the DCI information with the first sequence and the second sequence to determine whether the DCI information includes ACK or NACK information for UL transmission of the MTC UE.
  • Fig. 1 illustrates a schematic diagram of the exemplary network deployment for implementing the present disclosure
  • Fig. 2 illustrates a schematic diagram of the DCI format according to embodiments of the present disclosure
  • FIG. 3 illustrates a flow chart of a method for UL transmission feedback for an MTC UE according to embodiments of the present disclosure
  • FIG. 4 illustrates a block diagram of an apparatus in the base station for UL transmission feedback for an MTC UE according to embodiments of the present disclosure
  • illjFig. 5 illustrates a flow chart for PDCCH processing at the base station in the prior art
  • FIG. 6 illustrates a flow chart of another method for UL transmission feedback for an MTC UE according to embodiments of the present disclosure
  • Fig. 7 illustrates a block diagram of an apparatus in the base station for UL transmission feedback for an MTC UE.
  • FIG. 8 illustrates a block diagram of an apparatus in an MTC UE for receiving UL transmission feedback from the base station.
  • Fig. 1 illustrates a schematic diagram of the exemplary network deployment for implementing the present disclosure.
  • the wireless communication network 100 includes one (or more) base station 110 and one or more UE 120, 122, 124, and 126 served by the base station 110.
  • the UEs 120 and 126 are described as MTC UEs and the UEs 122 and 24 are described as normal UEs (i.e. non-MTC UEs) by example. More particularly, the solution of the present disclosure will be described in detail with reference to MTC UE 120 in the following. However, those skilled in the art may appreciate that the present disclosure is not limited thereto and it is applicable to situations of arbitrary number of UEs as MTC UEs and is applicable to any MTC UE.
  • the MTC UEs may be within buildings with poor wireless coverage and therefore it is desired to enhance their coverage.
  • those skilled in the art may appreciate that the present disclosure is not limited thereto and it is applicable to MTC UEs at any locations.
  • the basic idea of the present disclosure is to design a DCI format specific to the MTC UEs for their UL transmission feedback.
  • IliliUL-grant needs tens of original bits, most of which are scheduling information.
  • MTC UEs do not require all the scheduling content and the DCI format for them can be compressed with only necessary information and optional other information remained.
  • a DCI format specific for an MTC UE is constructed to carry feedbacks for UL transmission of the MTC UE.
  • the newly constructed DCI format is different from any of existing DCI formats.
  • the length of the DCI format is different from any of existing ones, and thus an MTC UE receiving such a DCI format may identify it as carrying ACK/NACK information.
  • the workload for blind detection at the UE is slightly increased.
  • the newly constructed DCI format is one that was never used for MTC UEs previously.
  • the length of the newly constructed DCI format may be configured as any of that of DCI format ID, DCI format 2, DCI format 2A, DCI format 2B, DCI format 2C or DCI format 4.
  • the workload for blind detection at the UE is not increased.
  • the newly constructed DCI format contains only the fields necessary for the MTC UE, and the other unnecessary fields should be eliminated.
  • the newly constructed DCI format may include all or a portion of the following fields without limiting thereto.
  • [431ACK/NACK information It is used to indicate the ACK or NACK for UL transmission of the MTC UE. This field is mandatory and usually occupies 1 bit.
  • Retransmission Scheduling information It is used to notify the MTC UE of information on Physical Resource Blocks (PRBs) and/or Modulation and Coding Scheme (MCS) used for UL retransmission when the ACK/NACK field includes NACK information.
  • PRBs Physical Resource Blocks
  • MCS Modulation and Coding Scheme
  • the base station may want the UL retransmission to use different PRBs and/or MCS from that of the original transmission.
  • the retransmission scheduling field is used to notify the UE of the PRBs and/or MCS for its retransmission. Its length is determined by the bandwidth and is usually about 10 bits. When the bandwidth is fixed, the length of this field is fixed. This field is optional.
  • RV information of the retransmission is predefined and no RV control is needed. However, in some cases, the eNB may want the MTC UE to retransmit with a specified RV. For example, when the base station considers the MTC UE has lost its original UL grant, it may want the MTC UE to retransmit the original data block rather than retransmitting in the original RV. In this case, the RV information field in the DCI information is used to notify the UE of the RV information for its UL retransmission. This field is optional, and usually occupies 2 bits.
  • ACK/NACK information field is mandatory, and the other two fields are optional.
  • the ACK/NACK information field and the potential retransmission scheduling filed and RV information field form the original information bits of the DCI, therefore, the length of the original information bits in such a DCI is not fixed, but the final DCI has a fixed length.
  • a complete DCI format as shown in Fig. 2 may be designed.
  • the complete DCI format includes the following three portions.
  • DCI Header A bit map of n-1 bits may be used as the DCI header to indicate which fields exist in the original information bits, where n is the number of fields in the original information bits in different embodiments.
  • IlliFor example, when the newly designed DCI format needs to include three fields, i.e. n 3, 2 bits are needed in the DCI header to indicate whether there are a retransmission scheduling filed and a RV information field, where the first bit indicates whether there is a retransmission scheduling filed (whether PRBs are reallocated and whether a new MCS is specified, for example) and the second bit indicates whether there is a RV information field. For example, if the bit map is "00", it indicates that neither the retransmission scheduling filed nor the RV information field exists in the original information bits. If the bit map is "10", it indicates that the retransmission scheduling filed exists in the original information bits and the RV information field does not exist in the original information bits.
  • bit map If the bit map is "01”, it indicates that the RV information field exists in the original information bits and the retransmission scheduling filed does not exist in the original information bits. If the bit map is "11”, it indicates that both the retransmission scheduling filed and the RV information field exist in the original information bits.
  • This field is composed of some repeated groups of original information bits. As described above, when the information bits in the DCI header is definite, the content of the original information bits is fixed. For example, if the DCI header is "11", and the retransmission scheduling filed includes 12 bits according to the bandwidth, there are 15 bits included in the original information bits, where the first 1 bit is the ACK/NACK information field, the following 12 bits are the retransmission scheduling filed and the last 2 bits are the RV information field.
  • the original information bits may be repeated any times under the limitation of the length of the DCI format. Preferably, the original information bits should be repeated as much as possible.
  • Tail This portion includes padding bits to form a fixed length DCI format.
  • the entire DCI format contains only 3 bit information, including 2 bit header and 1 bit ACK/NACK.
  • the original information portion of the DCI format is the repetition of the 1 bit ACK/NACK. Therefore, compared with normal UL-grant, the new DCI format is much more efficient and the required repetitions are much less. Furthermore, the new DCI format may also maintain scheduling flexibility with high efficiency.
  • FIG. 3 illustrates a flow chart of a method 300 for UL transmission feedback for an MTC UE 120 according to embodiments of the present disclosure.
  • the base station 110 constructs DCI information specific for the MTC UE 120.
  • the DCI information includes at least ACK or NACK information for UL transmission of the MTC UE 120.
  • the construction of the DCI information may refer to the scheme 1 described above in connection with Fig. 2.
  • the base station 110 broadcasts the constructed DCI information to all its served UEs.
  • the base station 110 attaches a Cyclic Redundancy Check (CRC), performs channel encoding, scrambles with the RNTI of the MTC UE 120 on the constructed DCI information, and transmits the DCI information through PDCCH.
  • CRC Cyclic Redundancy Check
  • the MTC UE 120 descrambles the received PDCCH with its RNTI to obtain the DCI information for it.
  • the MTC UE 120 also performs almost the same processing procedures as those in the prior art and the difference only lies in that if the MTC UE 120 determines that the format of the received DCI information is different from any known DCI formats or the format of the received DCI information is one never used for MTC UE before, it may determine that the DCI information carries feedback information for its UL transmission.
  • FIG. 4 illustrates a block diagram of an apparatus 400 in the base station 110 for UL transmission feedback for the MTC UE 120 according to embodiments of the present disclosure.
  • the apparatus 400 includes a DCI constructing unit 410 configured to construct DCI information specific for the MTC UE 120.
  • the DCI information includes at least ACK or NACK information for UL transmission of the MTC UE 120.
  • the construction of the DCI information may refer to the scheme 1 described above in connection with Fig. 2.
  • the apparatus 400 further includes a transmitting unit 420 configured to broadcast the constructed DCI information to all its served UEs.
  • the base station 110 attaches a Cyclic Redundancy Check (CRC), performs channel encoding, scrambles with the RNTI of the MTC UE 120 on the constructed DCI information, and transmits the DCI information through PDCCH.
  • CRC Cyclic Redundancy Check
  • the constructed DCI format may be a new format different from any of existing DCI formats, or may be one existing format that was never used for MTC UEs before such as any one of DCI format ID, DCI format 2, DCI format 2A, DCI format 2B, DCI format 2C or DCI format 4.
  • two code words may be selected from the existing DCI formats and reinterpreted as ACK or NACK, respectively.
  • the UE does not need to be designed to decode another DCI, which may reduce the attempting amount for the blind detection.
  • the time-frequency resources for the retransmission are predetermined and it is sufficient to use 1 bit of ACK/NACK information. If the base station does not support retransmission scheduling and RV control function for MTC UEs, 1 bit of ACK/NACK information is also enough for the MTC UE. In the following, a solution is provided for more efficiently transmitting 1 bit of original information in the PDCCH to indicate ACK/NACK for the MTC UE.
  • 1 ig. 5 illustrates a flow chart for PDCCH processing at the base station in the prior art.
  • the original information bits shown in Fig. 5 may be limited to two bit sequences called as original sequences.
  • One original sequence indicates ACK for UL transmission of the MTC UE and the other original sequence indicates NACK for UL transmission of the MTC UE.
  • the original sequences may be considered as a certain repetition code with a 1 bit input of 0 or 1.
  • the attached CRC is not used for parity check but as also some kind of repetition code.
  • CRC CRC to ensure the correctness of the received data is very inefficient.
  • An efficient way to achieve this is to use channel coding such as repetition.
  • the original sequence is originated with 1 bit information, and it is a kind of repetition.
  • the calculated CRC also has only two candidates and it could be seen as another repetition code.
  • the repetition gain can be obtained by using sequence detection.
  • the MTC UE only has to measure the correlated value of the DCI information with the sequences 0 and 1. If the correlated value with sequence 0 or 1 exceeds a threshold, the MTC UE considers it as a sequence 0 or 1, i.e., it indicates ACK or NACK for UL transmission of the MTC UE. Else, it considers the PDCCH candidate is not for itself.
  • this format for ACK/NACK can be seen as with a very large aggregation level and it has very large coverage gain. For example, if the length of the original sequences is 44, the original 1 bit is repeated for 44 times within one ACK or NAK. As a result, only 1 or 2 repetitions of the new ACK/NACK format are enough to meet the most critical coverage extension demand.
  • Fig. 6 illustrates a flow chart of another method 600 for UL transmission feedback for an MTC UE according to embodiments of the present disclosure.
  • the base station 110 constructs DCI information specific for the MTC UE 120.
  • the DCI information includes a first sequence or a second sequence different from the first sequence for indicating ACK or NACK for UL transmission of the MTC UE 120, respectively.
  • the base station 110 scrambles the constructed DCI information with the RNTI of the MTC UE 120.
  • the base station 110 broadcasts the scrambled DCI information to all its served UEs.
  • the base station 110 broadcasts the scrambled DCI information to all UEs through the PDCCH.
  • the MTC UE 120 descrambles the received PDCCH with its RNTI to obtain the DCI information for it.
  • the MTC UE 120 correlates the obtained DCI information with the first sequence and the second sequence to determine whether the DCI information includes ACK or NACK information for its UL transmission.
  • step 660 further includes:
  • the correlated value of the obtained DCI information with the first sequence is larger than a first threshold, determining that the DCI information includes ACK information for UL transmission of the MTC UE 120;
  • DCI information with the second sequence is not larger than the second threshold, determining that there is no DCI information for the MTC UE 120 in the received
  • FIG. 7 illustrates a block diagram of an apparatus 700 in the base station 110 for UL transmission feedback for the MTC UE 120.
  • the apparatus 700 includes a DCI constructing unit configured to construct DCI information specific for the MTC UE 120 including a first sequence or a second sequence different from the first sequence, where the first sequence is used to indicate ACK for UL transmission of the MTC UE 120 and the second sequence is used to indicate NACK for UL transmission of the MTC UE 120; a scrambling unit 720 configured to scramble the constructed DCI information with the RNTI of the MTC UE 120; and a transmitting unit 730 configured to broadcast the scrambled DCI information to all UEs served by the base station 110.
  • a DCI constructing unit configured to construct DCI information specific for the MTC UE 120 including a first sequence or a second sequence different from the first sequence, where the first sequence is used to indicate ACK for UL transmission of the MTC UE 120 and the second sequence is used to indicate NACK for UL transmission of the MTC UE 120
  • a scrambling unit 720 configured to scramble the constructed DCI information with the RNTI of the
  • FIG. 8 illustrates a block diagram of an apparatus 800 in the MTC UE 120 for receiving UL transmission feedback from the base station 110.
  • the apparatus 800 includes a receiving unit 810 configured to receive the PDCCH broadcasted by the base station 110; a descrambling unit 820 configured to descramble the received PDCCH with the RNTI of the MTC UE 120 to obtain the DCI information specific for the MTC UE 120; and a correlating unit 830 configured to correlate the DCI information with the first sequence and the second sequence to determine whether the DCI information includes ACK or NACK information for the UL transmission of the MTC UE 120.
  • PI I 1CI I requires 10.33dB coverage enhancement, i.e., 20-25 repetitions.
  • PDCCH requires 9.6dB coverage enhancement, i.e., about 20 repetitions.
  • two existing candidates using direct PHICH and UL grant consume 240-300 resource elements (REs) and 5760 REs, respectively.
  • base station may refer to the coverage area of the base station or the base station or the base station subsystem serving the coverage area according to its context.
  • base station may be interchangeably used with “cell,” “Node B,” or “eNodeB.”
  • the functions of the present application may be implemented using hardware, software, firmware, or any combinations thereof.
  • the functions may be stored on a computer readable medium as one or more instructions or codes, or transmitted as one or more instructions or codes on the computer readable medium.
  • the computer readable medium comprises a computer storage medium and a communication medium.
  • the communication medium includes any medium that facilitates transmission of the computer program from one place to another.
  • the storage medium may be any available medium accessible to a general or specific computer.
  • the computer-readable medium may include, for example, but not limited to, RAM, ROM, EEPROM, CD-ROM or other optical disc storage devices, magnetic disk storage devices, or other magnetic storage devices, or any other medium that carries or stores desired program code means in a manner of instructions or data structures accessible by a general or specific computer or a general or specific processor. Furthermore, any connection may also be considered as a computer-readable medium.
  • co-axial cable an optical cable, a twisted pair wire, a digital subscriber line (DSL), or radio technologies such as infrared, radio or microwave
  • co-axial cable, optical cable, twisted pair wire, digital subscriber line (DSL), or radio technologies such as infrared, radio or microwave are also covered by the definition of medium.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • a general-purpose processor may be a microprocessor, but in the alternative, the processor may be any normal processor, controller, microcontroller, or state machine.
  • a processor may also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.

Abstract

La présente invention concerne des procédés et des appareils pour rétroaction de transmission en liaison montante pour un équipement utilisateur (UE) de MTC. Un procédé comprend les étapes consistant à construire des informations DCI spécifiques à l'UE de MTC, les informations DCI comprenant au moins des informations ACK ou NACK pour la transmission en liaison montante de l'UE de MTC; et diffuser les informations DCI à tous les UE desservis par la station de base.
PCT/IB2015/000239 2014-01-29 2015-01-14 Procédés et appareils pour rétroaction de transmission en liaison montante pour un ue de mtc WO2015114459A1 (fr)

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CN201410043795.4 2014-01-29
CN201410043795.4A CN104811284B (zh) 2014-01-29 2014-01-29 为mtc ue进行上行链路传输反馈的方法和装置

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EP3346628A4 (fr) * 2015-09-25 2018-09-12 Huawei Technologies Co., Ltd. Procédé de transmission d'informations de retour, station de base et équipement utilisateur
US11444728B2 (en) * 2017-03-24 2022-09-13 Telefonaktiebolaget Lm Ericsson (Publ) Uplink HARQ-ack feedback for MTC
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EP3399681A4 (fr) * 2016-01-19 2018-12-26 Huawei Technologies Co., Ltd. Procédé et dispositif de rétroaction pour un canal de liaison montante
CN107370574A (zh) * 2016-05-12 2017-11-21 株式会社Ntt都科摩 针对上行数据传输的反馈方法及装置
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WO2019028833A1 (fr) * 2017-08-11 2019-02-14 华为技术有限公司 Procédé et dispositif de transmission de données
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