WO2018112922A1 - Procédé et dispositif de transmission de données - Google Patents

Procédé et dispositif de transmission de données Download PDF

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Publication number
WO2018112922A1
WO2018112922A1 PCT/CN2016/111822 CN2016111822W WO2018112922A1 WO 2018112922 A1 WO2018112922 A1 WO 2018112922A1 CN 2016111822 W CN2016111822 W CN 2016111822W WO 2018112922 A1 WO2018112922 A1 WO 2018112922A1
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WO
WIPO (PCT)
Prior art keywords
harq process
harq
base station
terminal
data block
Prior art date
Application number
PCT/CN2016/111822
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English (en)
Chinese (zh)
Inventor
陈冬明
吴环宇
陈雍珏
Original Assignee
华为技术有限公司
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Publication date
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Priority to PCT/CN2016/111822 priority Critical patent/WO2018112922A1/fr
Priority to CN201680091762.4A priority patent/CN110100494B/zh
Publication of WO2018112922A1 publication Critical patent/WO2018112922A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • Embodiments of the present invention relate to the field of wireless communication technologies, and in particular, to a data transmission method and device for machine type communication.
  • Machine to Machine is a common application form in the Internet of Things (IOT).
  • IOT Internet of Things
  • 3GPP 3rd Generation Partnership Project
  • MTC Machine Type Communications
  • eMTC Enhanced evolved Machine Type Communications
  • the user equipment (UE) of the eMTC is divided into two coverage modes: mode A (Mode A) and mode B (Mode B).
  • eMTC supports up to eight Hybrid Auto Repeat Request (HARQ) processes.
  • HARQ Hybrid Auto Repeat Request
  • the evolved Node B transmits Downlink Control Information (DCI) by using the MTC Physical Downlink Control Channel (MPDCCH).
  • DCI Downlink Control Information
  • MPDCCH Physical Downlink Control Channel
  • the eNB transmits data to the UE by using a Physical Downlink Shared Channel (PDSCH) in the n+kth subframe, where k ⁇ 2.
  • PDSCH Physical Downlink Shared Channel
  • the UE transmits a feedback acknowledgement (ACK)/negative acknowledgement (NACK) of the data by using a Physical Uplink Control CHannel (PUCCH). From the transmission of ACK/NACK through the PUCCH to the eNB for demodulation and processing, approximately three Transmission Time Intervals (TTIs) are required. Therefore, the maximum number of supported HARQ processes cannot fill the gap of a HARQ process.
  • TTIs Transmission Time Intervals
  • the eNB transmits data to the UE through the PDSCH.
  • the UE decoding fails.
  • the UE sends the NACK information of the data to the eNB through the PUCCH.
  • the eNB performs demodulation and processing according to the NACK information.
  • the eNB schedules the retransmission data according to the downlink resource allocation situation. As shown in Figure 1, the round trip time of a HARQ process requires at least 10 TTIs.
  • the eMTC HARQ adopts a multi-process "stop-and-wait" HARQ implementation mode.
  • the process temporarily suspends transmission before waiting for ACK/NACK feedback.
  • the feedback is based on whether the feedback is ACK or NACK. Choose whether to send new data or retransmit.
  • the eNB/UE can of course not stop transmitting and wait in vain, and other parallel HARQ processes must be initiated to make full use of the time domain resources.
  • the number of processes in parallel HARQ is related to the round-trip time of a HARQ process, that is, the transmission delay is related to the processing time of the UE/eNB.
  • the round-trip time of the HARQ process is larger, and it needs to be supported to fill the HARQ process.
  • the number of parallel HARQ processes needs to be equal to the round-trip time TTI of the HARQ process, but the 3GPP protocol stipulates that under modeA, the eMTC supports a maximum of eight HARQ processes, and the number of eight HARQ processes cannot fill the HARQ.
  • the round trip time of the process there is a problem of insufficient number of processes.
  • ModeB the eMTC supports a maximum of two HARQ processes, and there is also a problem that the number of processes described above is insufficient.
  • the embodiment of the invention provides a method and a device for data transmission, which can improve the scheduling rate of the UE.
  • a first aspect a data transmission method, the method includes: when a base station performs data transmission with a terminal, the base station determines whether a preset number of hybrid automatic repeat request HARQ processes are occupied; if the base station determines When the preset number of HARQ processes are occupied, the base station selects, from the preset number of HARQ processes, the HARQ process that has the longest time interval from the most recent use as the first HARQ process; The base station performs the data transmission with the terminal by using the first HARQ process.
  • the base station selects the occupied HARQ for multiplexing, that is, when any HARQ process performs data transmission with any terminal, it can also be used for data transmission with other terminals to implement UE scheduling. Continuity to improve UE scheduling rate. Further, by multiplexing the HARQ process, the UE scheduling duration is reduced, and the UE power loss is reduced.
  • the base station performs the data transmission with the terminal by using the first HARQ process, including: according to the first HARQ process, the base station sends a physical downlink shared channel to the terminal Transmitting a data block; the base station receiving the HARQ feedback information sent by the terminal, where the HARQ feedback information indicates a receiving status of the data block; if the HARQ feedback information is an acknowledgement ACK or the first HARQ process reaches a pre- The maximum number of retransmissions is set, and the base station clears the data block.
  • the base station clears the data block corresponding to the first HARQ process, and uses the first A HARQ process transmits a new data block, and clearing the data block ensures that the first HARQ process is a process that can be used again for data transmission.
  • the method further includes: if there is no idle second HARQ process, the base station selects a third HARQ that is the longest time interval from the last use in the predetermined number of HARQ processes. The process retransmits the data block.
  • the third HARQ process is the same as or different from the first HARQ process.
  • the base station utilizes the And performing, by the HARQ process, the data transmission by the terminal, where the base station receives the data block sent by the terminal by using a physical uplink shared channel; if the base station correctly receives the data block sent by the terminal or the The first HARQ process reaches a preset maximum number of retransmissions, and the base station clears the buffer of the first HARQ process.
  • the base station performs the data transmission with the terminal by using the first HARQ process, including: the base station receiving the terminal by using a physical uplink shared channel. Transmitting a data block; if the base station cannot correctly receive the data block sent by the terminal, the base station determines whether there is an idle second HARQ process in the predetermined number of HARQ processes, if there is any idle a second HARQ process, the base station instructing the terminal to retransmit the data block using the second HARQ process.
  • the method further includes: if there is no idle second HARQ process, the base station selects a third HARQ process in the predetermined number of HARQ processes, and instructs the terminal to use the The third HARQ process retransmits the data block.
  • the base station includes: a determining module, configured to determine whether a preset number of hybrid automatic repeat request HARQ processes are occupied when the base station and the terminal to which the determining module belongs perform data transmission a selection module, if the preset number of HARQ processes are occupied, for selecting a first HARQ process from the preset number of HARQ processes; and a processing module, configured to utilize the first HARQ process and the The terminal performs the data transmission.
  • the base station selects the occupied HARQ for multiplexing, that is, when any HARQ process performs data transmission with any terminal, it can also be used for data transmission with other terminals to implement UE scheduling. Continuity, improve UE scheduling rate, reduce UE scheduling duration, and reduce UE power loss.
  • the processing module is further configured to: if there is no idle second HARQ process, select a third HARQ process to retransmit the data block in the predetermined number of HARQ processes.
  • the processing module is specifically configured to: receive, according to the first HARQ process, a data block sent by the terminal by using a physical uplink shared channel; if the base station correctly receives the location sent by the terminal The data block or the first HARQ process reaches a preset maximum number of retransmissions, and the buffer of the first HARQ process is cleared.
  • the determining module is specifically configured to: select, from the preset number of HARQ processes, a HARQ process that has the longest time interval from the last use as the first HARQ process.
  • a processor for reading a program in the memory performing the following process:
  • the processor is specifically configured to: send, according to the first HARQ process, a data block to the terminal by using a physical downlink shared channel; and receive HARQ feedback information sent by the terminal, the HARQ The feedback information indicates a receiving status of the data block; if the HARQ feedback information is an acknowledgement ACK or the first HARQ process reaches a preset maximum number of retransmissions, the data block is cleared.
  • the processor is further configured to: send, according to the first HARQ process, a data block to the terminal by using a downlink physical shared channel; and receive HARQ feedback information sent by the terminal, where The HARQ feedback information indicates a receiving state of the data block; if the HARQ feedback information is a negative acknowledgement NACK, determining whether there is an idle second HARQ process in the predetermined number of HARQ processes, if there is an idle second HARQ The process retransmits the data block using the second HARQ process.
  • the processor is specifically configured to: receive, according to the first HARQ process, a data block sent by the terminal by using a physical uplink shared channel; if the base station correctly receives the location sent by the terminal The data block or the first HARQ process reaches a preset maximum number of retransmissions, and the buffer of the first HARQ process is cleared.
  • the processor is specifically configured to: if there is no idle second HARQ process, select a HARQ process that has the longest interval from the last used time from the preset number of HARQ processes, And as the third HARQ process, where the third HARQ process is the same as or different from the first HARQ process.
  • a data transmission method and device are provided.
  • the base station determines whether a preset number of hybrid automatic repeat request HARQ processes are occupied; A preset number of HARQ processes are already occupied, and the base station selects a first HARQ process from the preset number of HARQ processes; the base station performs the data transmission with the terminal by using the first HARQ process.
  • the base station implements continuity of UE scheduling by multiplexing the HARQ process, and improves the scheduling rate of the UE. Further, by multiplexing the HARQ process, the UE scheduling duration is reduced, and the UE power loss is reduced.
  • FIG. 2 is a schematic diagram of a data transmission process of multiple HARQ processes according to an embodiment of the present invention
  • FIG. 7 is a schematic structural diagram of hardware of a device for data transmission according to an embodiment of the present invention.
  • the embodiment of the invention provides a method for data transmission. As shown in FIG. 4, the method includes the following process:
  • the base station determines whether a preset number of hybrid automatic repeat request HARQ processes are occupied.
  • the terminal may be referred to as a user equipment, a mobile station, or a mobile terminal.
  • the terminal may communicate with one or more core network devices via a Radio Access Network (RAN).
  • RAN Radio Access Network
  • the terminal may be Mobile phones (or "cellular" phones) or computers with mobile terminals, etc., for example, the terminals can also be portable, pocket-sized, handheld, computer-integrated or in-vehicle mobile devices that exchange voice with the wireless access network. And / or data.
  • the base station selects, as the first HARQ process, a HARQ process that has the longest time interval from the most recent use from the preset number of HARQ processes.
  • the base station performs the data transmission with the terminal by using the first HARQ process.
  • the base station sends a data block to the terminal by using a downlink physical shared channel according to the first HARQ process; the base station receives HARQ feedback information sent by the terminal, where the HARQ feedback information indicates the data a receiving state of the block; if the HARQ feedback information is a negative acknowledgement NACK, the base station determines whether there is an idle second HARQ process in the predetermined number of HARQ processes, and if there is an idle second HARQ process, the use The second HARQ process retransmits the data block.
  • the base station Before the base station sends a data block to the terminal by using the PDSCH, the base station sends a DCI to the terminal by using an MPDCCH, where the DCI carries an NDI value, when the third HARQ process and the first HARQ process When the same, the NDI value carried in the DCI is the same as the NDI value carried in the DCI sent by the base station to the UE last time; when the third HARQ process is different from the first HARQ process, The NDI value carried in the DCI is different from the NDI value carried in the DCI that the base station sends to the UE last time.
  • the base station before the base station receives the data block sent by the terminal by using the PUSCH, the base station sends uplink control information (UCI) to the terminal through the MPDCCH, and uses the second HARQ process to perform data.
  • UCI uplink control information
  • the NDI value carried in the UCI is different from the NDI value carried in the UCI that the base station sends to the UE last time.
  • the base station Before the base station receives the data block sent by the terminal by using the PUSCH, the base station sends a UCI to the terminal by using an MPDCCH, where the UCI carries an NDI value, when the third HARQ process and the first HARQ When the process is the same, the NDI value carried in the UCI is the same as the NDI value carried in the UCI that the base station sends to the UE last time; when the third HARQ process is different from the first HARQ process, The NDI value carried in the UCI is different from the NDI value carried in the UCI that the base station sends to the UE last time.
  • an embodiment of the present invention provides a base station.
  • the base station includes:
  • the determining module 61 is configured to determine whether a preset number of hybrid automatic repeat request HARQ processes are occupied when the base station to which the determining module belongs and the terminal perform data transmission;
  • the selecting module 62 is configured to select a first HARQ process from the preset number of HARQ processes if the preset number of HARQ processes are occupied.
  • processing module is specifically configured to:
  • processing module is specifically configured to:
  • processing module is further configured to:
  • the third HARQ process is selected to retransmit the data block in the predetermined number of HARQ processes.
  • processing module is specifically configured to:
  • the base station If the base station correctly receives the data block sent by the terminal or the first HARQ process reaches a preset maximum number of retransmissions, clear the buffer of the first HARQ process.
  • processing module is specifically configured to:
  • processing module is further configured to:
  • the determining module is specifically configured to:
  • the determining module is further configured to:
  • the HARQ process having the longest time interval from the last use is selected as the third HARQ process from the preset number of HARQ processes, wherein the third HARQ process Same or different from the first HARQ process.
  • the base station includes a transceiver 710, and at least one processor 700 coupled to the transceiver 710, wherein:
  • the processor 700 is configured to read a program in the memory 720 and perform the following process:
  • the base station determines whether a preset number of hybrid automatic repeat request HARQ processes are occupied; if the preset number of HARQ processes are already occupied, the base station is from the Selecting a first HARQ process from a preset number of HARQ processes; and the base station performs the data transmission with the terminal by using the first HARQ process.
  • the bus architecture may include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 700 and various circuits of memory represented by memory 720.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein.
  • the bus interface provides an interface.
  • Transceiver 710 can be a plurality of components, including a transmitter and a receiver, providing means for communicating with various other devices on a transmission medium.
  • the processor 700 is responsible for managing the bus architecture and general processing, and the memory 720 can store data used by the processor 700 in performing operations.
  • the processor 700 is configured to: send, according to the first HARQ process, a data block to the terminal by using a physical downlink shared channel; and receive HARQ feedback information sent by the terminal, where the HARQ feedback information indicates The receiving state of the data block; if the HARQ feedback information is an acknowledgment ACK or the first HARQ process reaches a preset maximum retransmission number, the data block is cleared.
  • the processor 700 is further configured to: send, according to the first HARQ process, a data block to the terminal by using a downlink physical shared channel, and receive HARQ feedback information sent by the terminal, the HARQ feedback information. Determining a reception status of the data block; if the HARQ feedback information is a negative acknowledgement NACK, determining whether there is an idle second HARQ process in the predetermined number of HARQ processes, and if there is an idle second HARQ process, using The second HARQ process retransmits the data block.
  • the processor 700 is further configured to: if there is no idle second HARQ process, select a third HARQ process to retransmit the data block in the predetermined number of HARQ processes.
  • the processor is specifically configured to: receive, according to the first HARQ process, a data block sent by the terminal by using a physical uplink shared channel; if the base station correctly receives the data block sent by the terminal, or The first HARQ process reaches a preset maximum number of retransmissions, and the buffer of the first HARQ process is cleared.
  • the processor 700 is configured to: receive, according to the first HARQ process, a data block sent by the terminal by using a physical uplink shared channel; and if the base station cannot correctly receive the data sent by the terminal And determining, by the block, whether there is an idle second HARQ process in the predetermined number of HARQ processes, and if there is an idle second HARQ process, instructing the terminal to retransmit the data block by using the second HARQ process.
  • the processor 700 is further configured to: if there is no idle second HARQ process, select a third HARQ process in the predetermined number of HARQ processes, and instruct the terminal to use the third HARQ The process retransmits the data block.
  • the processor 700 is specifically configured to: select, from the preset number of HARQ processes, a HARQ process that has the longest time interval from the last use, as the first HARQ Cheng.
  • the processor 700 is specifically configured to: if there is no idle second HARQ process, select, from the preset number of HARQ processes, a HARQ process that has the longest time interval from the last use, as the a third HARQ process, wherein the third HARQ process is the same as or different from the first HARQ process.
  • the processor 700 controls the transceiver 710 to perform air interface information interaction between the base station and the terminal.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in a block or blocks of a flow or a flow and/or a block diagram of a flowchart Step.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)

Abstract

L'invention concerne un procédé et un dispositif de transmission de données, destinés à être utilisés pour résoudre les problèmes de planification d'UE discontinue, de taux planification d'UE restreint, d'une durée de planification d'UE augmentée et d'une perte accrue de puissance d'UE due à des processus HARQ insuffisants. Lorsqu'une transmission de données est effectuée entre une station de base et un terminal, la station de base détermine si une quantité prédéfinie de processus de demande de répétition automatique hybride (HARQ) est occupée ; si la quantité prédéfinie de processus HARQ est occupée, la station de base sélectionne un premier processus HARQ à partir de la quantité prédéfinie de processus HARQ ; effectuer une transmission de données entre la station de base et le terminal à l'aide du premier processus HARQ.
PCT/CN2016/111822 2016-12-23 2016-12-23 Procédé et dispositif de transmission de données WO2018112922A1 (fr)

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PCT/CN2016/111822 WO2018112922A1 (fr) 2016-12-23 2016-12-23 Procédé et dispositif de transmission de données
CN201680091762.4A CN110100494B (zh) 2016-12-23 2016-12-23 一种数据传输的方法及设备

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WO2021126924A1 (fr) * 2019-12-20 2021-06-24 Idac Holdings, Inc. Procédés d'amélioration de la fiabilité d'un mbms dans des systèmes sans fil
CN113517956A (zh) * 2020-04-10 2021-10-19 华为技术有限公司 一种清空缓存的方法及装置

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CN111277371B (zh) * 2020-01-20 2022-11-08 展讯通信（上海）有限公司 数据传输方法及设备
CN113938839B (zh) * 2020-06-29 2023-03-24 华为技术有限公司 一种数据传输方法及装置

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WO2021126924A1 (fr) * 2019-12-20 2021-06-24 Idac Holdings, Inc. Procédés d'amélioration de la fiabilité d'un mbms dans des systèmes sans fil
CN113517956A (zh) * 2020-04-10 2021-10-19 华为技术有限公司 一种清空缓存的方法及装置

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