WO2020063782A1 - Procédé et appareil de communication - Google Patents

Procédé et appareil de communication Download PDF

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Publication number
WO2020063782A1
WO2020063782A1 PCT/CN2019/108277 CN2019108277W WO2020063782A1 WO 2020063782 A1 WO2020063782 A1 WO 2020063782A1 CN 2019108277 W CN2019108277 W CN 2019108277W WO 2020063782 A1 WO2020063782 A1 WO 2020063782A1
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WO
WIPO (PCT)
Prior art keywords
feedback information
time
harq feedback
symbol
physical uplink
Prior art date
Application number
PCT/CN2019/108277
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English (en)
Chinese (zh)
Inventor
张战战
铁晓磊
花梦
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华为技术有限公司
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Publication of WO2020063782A1 publication Critical patent/WO2020063782A1/fr

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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
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/28—Discontinuous transmission [DTX]; Discontinuous reception [DRX]

Definitions

  • the present application relates to the field of communication technologies, and in particular, to a communication method and device.
  • wireless communication systems have designed a connected-discontinuous reception (C-DRX) mechanism to allow terminal devices to periodically enter the sleep state when they are in a radio resource control (RRC) connection state.
  • RRC radio resource control
  • PDCCH physical downlink control channel
  • the terminal device is woken up from the sleep state to the active state to achieve the purpose of power saving.
  • the terminal device After detecting the PDCCH, the terminal device receives a physical downlink shared channel (PDSCH) according to the downlink scheduling information carried by the PDCCH. After decoding the PDSCH, the terminal device sends a hybrid automatic repeat request (HARQ) to a network device through a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH). )Feedback.
  • PDSCH physical downlink shared channel
  • HARQ hybrid automatic repeat request
  • the terminal device After sending all the symbols of the PUCCH or PUSCH carrying the HARQ feedback information, the terminal device starts a downlink hybrid automatic retransmission request round-trip timer (HARQ-RTT-TimerDL).
  • the length of the HARQ-RTT-TimerDL is configured by the network device according to the processing of HARQ feedback information to determine the time configuration required for the process of retransmitting data.
  • the terminal device can assume that during HARQ-RTT-TimerDL timing, the network device will not schedule downlink control information (DCI) to indicate retransmission data. Therefore, the terminal device may not need to go during HARQ-RTT-TimerDL Listen for PDCCH.
  • DCI downlink control information
  • the terminal device When HARQ-RTT-TimerDL times out, if there is a transmission block (TB) decoding failure in the PDSCH, the terminal device will start the DRX Downlink Retransmission Timer (DRX-RetransmissionTimerDL), which will enter the active state and start blind detection to indicate the downlink retransmission Transmitted PDCCH.
  • DRX-RetransmissionTimerDL DRX Downlink Retransmission Timer
  • the network device After receiving the HARQ feedback information, the network device processes the HARQ feedback information, determines retransmission data, and schedules retransmission DCI when the terminal device is in an activated state.
  • the terminal device starts HARQ-RTT-TimerDL after sending all the symbols of PUCCH or PUSCH, which may cause the HARQ-RTT-TimerDL information to have been processed by the network device, but HARQ-RTT-TimerDL has not timed out, so DRX-RetransmissionTimerDL needs to wait until
  • the HARQ-RTT-TimerDL can be started only after it times out, resulting in a delay in the time when the terminal device enters the active state, which in turn causes the network device to wait for the terminal device to enter the active state after processing the HARQ feedback information. Causes increased data delay.
  • This application provides a communication method and device, which are used to solve the problem that the network equipment cannot schedule the retransmission DCI in time, which causes an increase in data delay.
  • the present application provides a communication method, which can be applied to a terminal device, or a chip on a terminal device, or a chipset on a terminal device, and the like.
  • the communication method includes: in a process of sending a physical uplink channel to the network device (the physical uplink channel carries HARQ feedback information of the hybrid automatic retransmission request), starting a downlink hybrid automatic retransmission request round-trip timer at a first point in time And allowing the terminal device not to monitor the physical downlink control channel during the time period of the downlink hybrid automatic retransmission request round-trip time timer, wherein the first time point is any time point in the first time period, the first time point The start time of the time period is the time when all the symbols carrying the HARQ feedback information are transmitted, and the end time of the first time period is the time when the last symbol of the physical uplink channel is transmitted.
  • the network device starts processing the HARQ feedback information after receiving the HARQ feedback information, and the terminal device starts the HARQ-RTT-TimerDL timer only after sending all symbols of the PUCCH or PUSCH carrying the HARQ feedback information.
  • the terminal device may not have to wait until all the symbols of the PUCCH or PUSCH are transmitted, but may be after the time point when all the symbols carrying the HARQ feedback information are transmitted, and before the time point when the last symbol of the PUCCH or PUSCH is transmitted.
  • the HARQ-RTT-TimerDL timer is started at any time, so that the delay of starting the DRX-RetransmissionTimerDL timer can be reduced, and the delay of the terminal device entering the active state can be reduced. Therefore, after processing the HARQ feedback information, the network device can reduce the waiting time for the terminal device to enter the active state, thereby scheduling the retransmission DCI in time, thereby reducing the data delay.
  • a terminal device sends symbols carrying HARQ feedback information at time t1, and all symbols of PUCCH or PUSCH are sent at time t2 after t1.
  • a terminal device needs to start HARQ-RTT- after time t2.
  • the TimerDL timer In the embodiment of the present application, the terminal device can start the HARQ-RTT-TimerDL timer at any time t3 after t1 and before t2. It can be seen that in the embodiment of the present application, the time at most t2-t3 can be reduced. Delay.
  • the first time point is a first symbol after sending a last symbol carrying the HARQ feedback information.
  • the downlink hybrid automatic retransmission request round trip time timer can minimize the waiting time for scheduling the retransmission DCI , which can minimize the data delay.
  • the terminal device sends the symbols carrying HARQ feedback information at time t1, and all the symbols of PUCCH or PUSCH are sent at time t2 after t1.
  • the terminal device can start the HARQ-RTT-TimerDL timer at time t1, which can reduce the The delay is about t2-t1.
  • the HARQ-RTT-TimerDL timer and the network device can process the HARQ feedback
  • the time of the information matches better, so that the network device can set the size of the HARQ-RTT-TimerDL timer according to the time when the HARQ feedback information is processed, reducing the complexity of the system configuration for the size of the HARQ-RTT-TimerDL timer.
  • the first time point is the first symbol after sending the symbol carrying the HARQ feedback information. If the HARQ feedback information is carried in multiple symbols, the first time point is the first symbol after the last symbol carrying the HARQ feedback information is sent.
  • a downlink hybrid automatic retransmission request round-trip timer is started at the next symbol of the symbol.
  • the last one carries HARQ feedback information. The next symbol of the symbol starts the downlink hybrid automatic retransmission request round-trip timer. In this way, the terminal device can be activated in time, so that the network device can schedule the retransmission DCI in time, which can reduce the data to the greatest extent. Delay.
  • the physical uplink channel may be a physical uplink control channel.
  • the terminal device can send HARQ feedback information on the physical uplink control channel.
  • the physical uplink channel may also be a physical uplink shared channel.
  • the terminal device may also send HARQ feedback information on the physical uplink shared channel.
  • HARQ feedback information may be sent on the physical uplink shared channel when the physical uplink control channel of a single time slot overlaps with the physical uplink shared channel of a single time slot.
  • HARQ feedback information may also be sent on the overlapping timeslot of the physical uplink shared channel.
  • the present application provides a device, which may be a terminal device, or a chip or chipset in the terminal device.
  • the apparatus may include a processing unit and a transceiving 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 used to store instructions, and the processing The unit executes the instructions stored by the storage unit, so that the terminal device performs the corresponding function in the first aspect.
  • the processing unit may be a processor, and the transceiver unit may be an input / output interface, a pin, or a circuit; the processing unit executes instructions stored in the storage unit to Cause the terminal device to perform the corresponding function in the first aspect, the storage unit may be a storage unit (for example, a register, a cache, etc.) in the chip or chipset, or may be the chip or chip located in the terminal device A storage unit external to the group (e.g., read-only memory, random access memory, etc.).
  • an apparatus including: a processor, a communication interface, and a memory.
  • the communication interface is used to transfer information, and / or messages, and / or data between the device and other devices.
  • the memory is used to store computer execution instructions. When the device is running, the processor executes the computer execution instructions stored in the memory, so that the device executes the communication method according to the first aspect or any one of the first aspects. .
  • the present application further provides a computer-readable storage medium, where the computer-readable storage medium stores instructions, and when the computer-readable storage medium runs on the computer, the computer causes the computer to execute the methods described in the above aspects.
  • the present application also provides a computer program product including instructions that, when run on a computer, causes the computer to execute the methods described in the above aspects.
  • FIG. 1 is a schematic architecture diagram of a communication system provided by this application.
  • FIG. 2 is a schematic diagram of a downlink transmission provided by this application.
  • FIG. 3 is a schematic diagram of another downlink transmission provided by this application.
  • FIG. 5 is a schematic diagram of a downlink transmission provided by this application.
  • FIG. 6 is a schematic diagram of another type of downlink transmission provided by this application.
  • FIG. 7 is a schematic diagram of another type of downlink transmission provided by this application.
  • FIG. 8 is a schematic diagram of another type of downlink transmission provided by this application.
  • FIG. 9 is a schematic structural diagram of a communication device provided by this application.
  • FIG. 10 is a schematic structural diagram of a communication device provided by the present application.
  • the communication method provided in this application can be applied to a communication system configured with a discontinuous reception (DRX) mechanism.
  • the architecture of the communication system is shown in FIG. 1 and includes network equipment and terminal equipment, and uplink data transmission and downlink data transmission are performed between the network equipment and the terminal equipment.
  • the terminal device performs uplink data transmission based on the scheduling information sent by the network device.
  • the communication system involved in the embodiments of the present application may be various types of communication systems.
  • the communication system may be a long term evolution (LTE), a fifth generation (5G) communication system, or a universal terrestrial wireless access ( universal terrestrial radio access (UTRA), evolved UTRA (E-UTRAN), new wireless technology (new radio, NR), GSM / EDGE radio access network-circuit switched domain (GSM edge radio access network-circuit switched, GERAN- CS), GSM / EDGE wireless access network-data exchange domain (GSM / EDGE / radio / network-packet switched) (GERAN-PS), code division multiple access (CDMA) 2000-1XRTT, and multiple wireless access Multi-RAT (Dual-Connectivity, MR-DC) technology, etc., can also be a hybrid architecture of multiple communication systems, such as LTE and 5G hybrid architectures.
  • LTE long term evolution
  • 5G fifth generation
  • UTRA universal terrestrial radio access
  • E-UTRAN evolved UTRA
  • new wireless technology new radio, NR
  • GSM / EDGE radio access network-circuit switched domain GSM edge
  • the network device may be a common base station (such as Node B or eNB), may be a new wireless controller (new controller, NR controller), may be a gNodeB (gNB) in a 5G system, and may be a centralized network.
  • the central unit can be a new wireless base station, a radio remote module, a micro base station, a relay, a distributed unit, or a reception point. point (TRP) or transmission point (TP) or any other wireless access device, but the embodiment of the present application is not limited thereto.
  • Terminal equipment also known as user equipment (UE) is a device that provides voice and / or data connectivity to users, such as handheld devices with wireless connectivity, vehicle-mounted devices, and so on.
  • UE user equipment
  • Common terminals include, for example, mobile phones, tablet computers, notebook computers, handheld computers, mobile Internet devices (MID), and wearable devices, such as smart watches, smart bracelets, pedometers, and the like.
  • MID mobile Internet devices
  • wearable devices such as smart watches, smart bracelets, pedometers, and the like.
  • a terminal device when a terminal device is in a radio resource control (RRC) connection state, if there is no DRX mechanism, the terminal device will always monitor the PDCCH subframe.
  • RRC radio resource control
  • the terminal device does not always have information interaction with the network device, but there is a certain time interval. If the terminal device is always listening to the physical downlink control channel (physical downlink control channel) , PDCCH) will cause terminal equipment to consume power. Therefore, under the premise of ensuring effective data transmission, the wireless communication system has designed a DRX mechanism to allow the terminal device to periodically enter the sleep state at some times, instead of monitoring the PDCCH subframe, and when it is necessary to monitor the PDCCH, the terminal device Wake up from sleep to save power.
  • RRC radio resource control
  • the terminal device In the DRX mechanism, if the terminal device is in an active state, the terminal device will continuously monitor the PDCCH.
  • DRX duration timer DRX-onDurationTimer
  • DRX-InactivityTimer DRX inactive timer
  • DRX-RetransmissionTimerDL DRX downlink retransmission timer
  • DRX-RetransmissionTimerUL DRX uplink retransmission timer
  • DRX-InactivityTimer is started when a terminal device receives a PDCCH indication for a downlink or uplink new transmission. During the timing of DRX-InactivityTimer, the terminal device is in the active state. In the downlink transmission process, when the terminal device sends to the network device a physical uplink control channel (physical uplink control channel (PUCCH) or hybrid uplink shared channel (PUCCH) that carries hybrid automatic repeat request (HARQ) feedback information. physical uplink (PUSCH), the downlink HARQ round-trip time timer (HARQ-RTT-TimerDL) will be started.
  • PUCCH physical uplink control channel
  • PUCCH hybrid uplink shared channel
  • HARQ-RTT-TimerDL the downlink HARQ round-trip time timer
  • HARQ-RTT-TimerDL indicates that the network device will not immediately retransmit, so the HARQ-RTT-TimerDL timing period , Allows the terminal device to enter the inactive state, that is, it may not monitor the PDCCH.
  • HARQ-RTT-TimerDL times out, if the terminal device has decoding failure data, DRX-RetransmissionTimerDL is started. During the DRX-RetransmissionTimerDL timing, the terminal device is in the active state.
  • the following is the downlink transmission process of the terminal equipment in the RRC connection state under the DRX mechanism.
  • Step 1 During the DRX-onDurationTimer timing, the terminal device monitors the PDCCH.
  • Step 2 If the terminal device detects that the PDCCH indicates a new downlink transmission during the DRX-onDurationTimer timing, it starts the DRX-InactivityTimer. A new transfer of data indicates the start of a HARQ process.
  • Step 3 The terminal device decodes downlink control information (DCI) in the PDCCH, and receives the PDSCH based on the DCI.
  • DCI downlink control information
  • Step 4 The terminal device sends HARQ feedback information to the network device in the PUCCH or PUSCH.
  • Step 5 The terminal device starts the HARQ-RTT-TimerDL corresponding to the HARQ process after sending all symbols of the PUCCH or PUSCH carrying HARQ feedback information.
  • Step 6 When HARQ-RTT-TimerDL times out, if the previous PDSCH has a transmission block (TB) that failed to decode, the terminal device will start DRX-RetransmissionTimerDL. During the DRX-RetransmissionTimerDL timing period, go to step 7. If all previous PDSCH decoding is successful, the terminal device does not start DRX-RetransmissionTimerDL.
  • TB transmission block
  • Step 7 During the DRX-RetransmissionTimerDL timing, the terminal device is in an active state and starts blind detection of the PDCCH. If the terminal device detects the retransmission DCI during the timing of the DRX-RetransmissionTimerDL, the DRX-RetransmissionTimerDL is turned off and the PDSCH is received based on the retransmission DCI. After the PDSCH is decoded, steps 4 to 7 are performed.
  • the length of the HARQ-RTT-TimerDL is configured by the network device. Specifically, the length of the HARQ-RTT-TimerDL is related to the time K3 when the network device processes the HARQ feedback information, where K3 represents the HARQ feedback information of a certain HARQ process received from the network device and then processes the HARQ feedback information to determine Time to retransmit data.
  • the terminal device starts HARQ-RTT-TimerDL after sending all the symbols of the PUCCH or PUSCH carrying HARQ feedback information, but this may cause the HARQ-RTT-TimerDL startup delay.
  • the symbol carrying the HARQ feedback information is the last symbol of the PUCCH or PUSCH
  • the terminal device will turn on the DRX-RetransmissionTimerDL to make the terminal device enter the active state.
  • the time when the terminal device starts HARQ-RTT-TimerDL and the network device starts processing HARQ feedback information are basically the same.
  • the time for retransmitting the DCI is also basically the same. Therefore, after processing the HARQ feedback information, the network device can send the retransmission DCI to the terminal device.
  • the symbols carrying the HARQ feedback information are some of the symbols starting from the PUCCH or PUSCH, and the time domain length of the PUCCH or PUSCH carrying the HARQ feedback information is longer, as shown in FIG. 3, the terminal device ends the transmission of the PUCCH or PUSCH at the end.
  • HARQ-RTT-TimerDL is started at time t1
  • DRX-RetransmissionTimerDL is started at time t2 and enters the active state.
  • the network device After receiving all the symbols carrying the HARQ feedback information, the network device starts processing the HARQ feedback information at time t3. Because time t1 is later than time t3, that is, the time when the terminal device starts HARQ-RTT-TimerDL is later than the time when the network device starts processing HARQ feedback information, so after the network device has processed the HARQ feedback information, the HARQ-RTT-TimerDL on the terminal device side It has not timed out.
  • the network device needs to wait for the terminal device to start DRX-RetransmissionTimerDL and enter the active state to send a retransmission DCI to the terminal device. This causes the network device to wait for t1-t3. As a result, network devices cannot schedule DCI retransmissions in a timely manner, resulting in increased data delay.
  • the embodiments of the present application provide a communication method and device, which are used to solve the problem that network equipment cannot schedule DCI retransmission in time, which causes an increase in data delay.
  • the terminal device may start a downlink hybrid automatic retransmission request round-trip timer before the time when the last symbol of the physical uplink channel is transmitted after the time when all symbols carrying the HARQ feedback information are transmitted. That is, HARQ-RTT-TimerDL is started at any time t4 between t3 and t1, so that the network device can reduce the delay of t1-t4, thereby reducing the data delay to a certain extent.
  • the method and the device are based on the same inventive concept. Since the principle of the method and the device for solving the problem is similar, the implementation of the device and the method can be referred to each other, and duplicated details will not be repeated.
  • the multiple involved in the embodiments of the present application refers to two or more.
  • the communication method provided in the present application may be applied to a terminal device, or a chip in the terminal device, or a chipset on the terminal device, and the like.
  • the method includes:
  • a terminal device sends a physical uplink channel to a network device, where the physical uplink channel carries HARQ feedback information.
  • the HARQ feedback information may include the decoding result of the terminal device receiving one or more TBs in the PDSCH during a HARQ process.
  • the HARQ feedback information may be TB-based ACK / NACK information, that is, ACK indicates that the corresponding TB decoding is successful, and NACK indicates that the corresponding TB decoding fails.
  • the HARQ feedback information may also be ACK / NACK information based on a code block group (CBG), that is, the TB is divided into multiple code blocks (CBG), and then the multiple CB blocks are divided into several CBG, HARQ
  • CBG code block group
  • the feedback information uses ACK to indicate that all CBs in the corresponding CBG have been decoded successfully, and NACK indicates that there are CBs in the corresponding CBG that have failed to decode.
  • a new transfer of data indicates the start of a HARQ process.
  • the physical uplink channel may be PUCCH, or may also be PUSCH.
  • the PUCCH can be used to carry uplink control information (UCI).
  • the uplink control information can include a channel quality indicator (CQI), a precoding matrix indicator (PMI), and a rank indicator. (rank, indicator, RI), HARQ feedback information, and other control information.
  • the PUSCH can be used to carry uplink data and / or uplink control information.
  • the terminal device starts a downlink hybrid automatic retransmission request round-trip timer at a first point in time, and allows the terminal device not to monitor a physical downlink control channel during the time period of the downlink hybrid automatic retransmission request round-trip timer.
  • the first time point is an arbitrary time point in the first time period, and the start time of the first time period is the time T1 when all the symbols carrying the HARQ feedback information are sent.
  • the termination time is the time T2 when the last symbol of the physical uplink channel is transmitted.
  • the arbitrary time point may be T1 or T2.
  • HARQ-RTT-TimerDL is configured for network devices based on the time required to process HARQ feedback information.
  • HARQ-RTT-TimerDL indicates that network devices will not immediately have retransmissions. Therefore, during HARQ-RTT-TimerDL timing, you can allow The terminal device enters an inactive state, that is, the terminal device may not be monitoring the PDCCH.
  • the terminal device may start the HARQ feedback information corresponding to the HARQ-RTT-TimerDL of the HARQ process at any time point in T2-T1.
  • the terminal device may start HARQ-RTT-TimerDL when sending any symbol in a time period defined in T2-T1.
  • the HARQ-RTT-TimerDL may be started when the first symbol after all the symbols carrying the HARQ feedback information is sent, or the second one after all the symbols carrying the HARQ feedback information may be sent HARQ-RTT-TimerDL is started when the symbol is displayed.
  • HARQ-RTT-TimerDL can also be started when the fifth symbol after all symbols carrying the HARQ feedback information is sent, and the like in this embodiment of the present application is not detailed here. limited.
  • the embodiment of the present application is described below by using the HARQ-RTT-TimerDL as an example to start the first symbol after all the symbols carrying the HARQ feedback information are sent.
  • the terminal device may start the HARQ-RTT-TimerDL when sending the first symbol after the last symbol carrying the HARQ feedback information. That is, the first time point is the first symbol after sending the last symbol carrying the HARQ feedback information.
  • An exemplary description is that if the HARQ feedback information is carried in one symbol, the terminal device starts the HARQ-RTT-TimerDL when sending the first symbol after the symbol carrying the HARQ feedback information. That is, the first time point is a first symbol after sending a symbol carrying the HARQ feedback information.
  • the terminal device starts the HARQ-RTT- when sending the first symbol after the last symbol carrying the HARQ feedback information.
  • TimerDL That is, the first time point is the first symbol after sending the last symbol carrying the HARQ feedback information.
  • the following takes the network device to configure the length of the HARQ-RTT-TimerDL to the time required to process the HARQ feedback information as an example, and combines the specific application scenario to describe the downlink transmission process in detail.
  • Scenario 1 The terminal device sends the HARQ feedback information of the corresponding HARQ process to the network device on the PUCCH.
  • the terminal device starts a DRX-onDurationTimer when a certain condition is met, and monitors the PDCCH during the timing of the DRX-onDurationTimer.
  • the terminal device starts a DRX-InactivityTimer when detecting a PDCCH indicating a new transmission of downlink data.
  • the terminal device decodes the DCI in the PDCCH and receives the PDSCH based on the DCI.
  • the terminal device carries the HARQ feedback information in the PUCCH and sends it to the network device.
  • the HARQ feedback information may include decoding results of one or more TBs in the PDSCH.
  • the terminal device starts the HARQ-RTT-TimerDL of the HARQ process after sending the first symbol after the last symbol carrying the HARQ feedback information.
  • the network device starts processing the HARQ feedback information after receiving the last symbol carrying the HARQ feedback information.
  • the first symbol after sending this symbol carrying HARQ feedback information starts the HARQ-RTT-TimerDL corresponding to the HARQ process.
  • the first symbol after the last symbol carrying HARQ feedback information is sent to start the HARQ-RTT-TimerDL corresponding to the HARQ process.
  • the terminal device starts DRX-RetransmissionTimerDL, and executes step S507.
  • the data block can be TB, CB, or CBG.
  • the terminal device does not start DRX-RetransmissionTimerDL.
  • the HARQ-RTT-TimerDL on the terminal device side basically ends the timing, that is, the terminal The device enters the active state, so that the network device can send a retransmission DCI after processing the HARQ feedback information. See Figure 5.
  • the terminal device is in an active state and starts blind detection of the PDCCH. If the terminal device detects the retransmission DCI during the timing of the DRX-RetransmissionTimerDL, the DRX-RetransmissionTimerDL is turned off and the PDSCH is received based on the retransmission DCI.
  • S504 to S507 can be continued.
  • Scenario 2 The terminal device sends HARQ feedback information of the corresponding HARQ process to the network device on the PUSCH.
  • a scenario where a terminal device sends HARQ feedback information of a corresponding HARQ process on a PUSCH may include a time slot overlap between a single-slot PUCCH and a single slot PUSCH, and a time slot overlap between a single-slot PUCCH and a multi-slot PUSCH.
  • the terminal device sends HARQ feedback information on a PUSCH resource on the time slot where the PUSCH and the PUCCH overlap.
  • the downlink transmission process when the terminal device sends the HARQ feedback information of the corresponding HARQ process to the network device on the PUSCH is similar to the downlink transmission process when the terminal device sends the HARQ feedback information of the corresponding HARQ process to the network device on the PUCCH.
  • the specific process can refer to step S501 Until S507, the details are not repeated here.
  • the terminal device starts the HARQ-RTT-TimerDL corresponding to the HARQ process when sending the first symbol after the last symbol carrying the HARQ feedback information. Because the length of the HARQ-RTT-TimerDL is equal to the time required for the network device to process the HARQ feedback information based on the process, after the network device has processed the HARQ feedback information, the HARQ-RTT-TimerDL on the terminal device side basically ends the timing, that is, the terminal The device enters the active state, so that the network device can send a retransmission DCI after processing the HARQ feedback information. As shown in Figure 6.
  • the symbol after the symbol where the demodulation reference signal (DMRS) is located may carry the HARQ feedback information. If there is an additional DMRS on the PUSCH, the symbol after the symbol on which the DMRS is attached may also carry HARQ feedback information, so the terminal device can start the HARQ corresponding to the HARQ process when the next symbol of the symbol on which the HARQ feedback information after the additional DMRS is transmitted is sent.
  • -RTT-TimerDL As shown in Figure 7.
  • the terminal device can send all The first symbol after the symbol starts the HARQ-RTT-TimerDL corresponding to the HARQ process. For example, if there are two frequency hopping on the PUSCH, the terminal device may start the HARQ-RTT-TimerDL corresponding to the HARQ process when the first symbol after the last symbol carrying HARQ feedback information is transmitted in the second frequency hopping . As shown in Figure 8.
  • the network device starts processing the HARQ feedback information after receiving the HARQ feedback information, and the terminal device starts the HARQ-RTT-TimerDL timer only after sending all symbols of the PUCCH or PUSCH carrying the HARQ feedback information.
  • the terminal device may not have to wait until all the symbols of the PUCCH or PUSCH are sent, but may start the HARQ-RTT-TimerDL timer after sending the first symbol after carrying the symbols carrying the HARQ feedback information, thereby reducing the start of the DRX-
  • the delay of the RetransmissionTimerDL timer can further reduce the delay of the terminal device entering the active state.
  • the network device can reduce the waiting time for the terminal device to enter the active state, thereby scheduling the retransmission DCI in time, thereby reducing the data delay. For example, in conjunction with FIG. 3 and FIG. 5, it can be seen that the delay of about t1-t3 can be reduced in the embodiment of the present application.
  • the terminal device may start the HARQ-RTT-TimerDL timer after sending the first symbol after the symbol carrying the HARQ feedback information, so that the HARQ-RTT-TimerDL timer and the network device can process the HARQ feedback information.
  • the time is better matched, so that the network device can set the size of the HARQ-RTT-TimerDL timer according to the time when the HARQ feedback information is processed, reducing the complexity of system configuration for the size of the HARQ-RTT-TimerDL timer.
  • an embodiment of the present application provides a communication device, which is specifically configured to implement the method described in the embodiment described in FIG. 4 to FIG. 8.
  • the device may be the communication device itself or a communication device.
  • the structure of the communication device may include a sending unit 901 and a processing unit 902 as shown in FIG. 9.
  • the sending unit 901 is configured to send a physical uplink channel to a network device, where the physical uplink channel carries hybrid automatic repeat request HARQ feedback information.
  • a processing unit 902 configured to start a downlink hybrid automatic retransmission request round-trip time timer at a first time point, and allow a terminal device not to listen to a physical downlink control channel during the timing of the downlink hybrid automatic retransmission request round-trip timer,
  • the first time point is an arbitrary time point in the first time period
  • the start time of the first time period is the time when all the symbols carrying the HARQ feedback information are sent
  • the time is the time when the last symbol of the physical uplink channel is transmitted.
  • the first time point is the first symbol after sending the last symbol carrying the HARQ feedback information.
  • the first time point is the first symbol after sending the symbol carrying the HARQ feedback information; if the HARQ feedback information is carried in multiple symbols , The first time point is the first symbol after sending the last symbol carrying the HARQ feedback information.
  • the physical uplink channel may be a physical uplink control channel or a physical uplink shared channel.
  • the division of the modules in the embodiments of the present application is schematic and is only a logical function division. In actual implementation, there may be another division manner.
  • the functional modules in the embodiments of the present application may be integrated into one process. In the device, it can also exist separately physically, or two or more modules can be integrated into one module.
  • the above integrated modules may be implemented in the form of hardware or software functional modules.
  • the communication device can be as shown in FIG. 10, and the processing unit 902 can be the processor 1002.
  • the processor 1002 may be a central processing module (CPU), or a digital processing module.
  • the sending unit 901 may be a communication interface 1001.
  • the communication interface 1001 may be a transceiver, an interface circuit such as a transceiver circuit, or a transceiver chip.
  • the communication device further includes: a memory 1003, configured to store a program executed by the processor 1002.
  • the memory 1003 may be a non-volatile memory, such as a hard disk (HDD) or a solid-state drive (SSD), etc., or a volatile memory, such as a random access memory (random -access memory, RAM).
  • the memory 1003 is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto.
  • the processor 1002 is configured to execute the program code stored in the memory 1003, and is specifically configured to perform the actions of the processing unit 902, which is not repeatedly described in this application.
  • connection medium between the communication interface 1001, the processor 1002, and the memory 1003 is not limited in the embodiment of the present application.
  • the memory 1003, the processor 1002, and the communication interface 1001 are connected by a bus 1004 in FIG. 10, and the bus is shown by a thick line in FIG. 10.
  • the connection modes between other components are only schematically illustrated. It is not limited.
  • the bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only a thick line is used in FIG. 10, but it does not mean that there is only one bus or one type of bus.
  • this application may be provided as a method, a system, or a computer program product. Therefore, this application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Moreover, this application may take the form of a computer program product implemented on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.
  • computer-usable storage media including, but not limited to, disk storage, CD-ROM, optical storage, etc.
  • These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to work in a particular manner such that the instructions stored in the computer-readable memory produce a manufactured article including an instruction device, the instructions
  • the device implements the functions specified in one or more flowcharts and / or one or more blocks of the block diagram.
  • These computer program instructions can also be loaded on a computer or other programmable data processing device, so that a series of steps can be performed on the computer or other programmable device to produce a computer-implemented process, which can be executed on the computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more flowcharts and / or one or more blocks of the block diagrams.

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

Abstract

L'invention concerne un procédé et un appareil de communication pour résoudre le problème d'une augmentation de retard de données due à un dispositif de réseau qui n'est pas capable de programmer des DCI de retransmission dans le temps. Le procédé consiste à : envoyer un canal de liaison montante physique à un dispositif de réseau, le canal de liaison montante physique portant des informations de retour de demande de redondance automatique hybride (HARQ) ; et démarrer un chronomètre de temps aller-retour de demande de redondance automatique hybride de liaison descendante à un premier instant, et permettre à un dispositif de terminal de ne pas surveiller un canal de commande de liaison descendante physique pendant le chronométrage du chronomètre de temps aller-retour de demande de redondance automatique hybride de liaison descendante, le premier instant étant un instant quelconque dans une première période de temps, le moment de démarrage de la première période de temps étant le moment où tous les symboles portant les informations de retour de HARQ sont envoyés, et le moment de fin de la première période de temps étant le moment où le dernier symbole du canal de liaison montante physique est envoyé.
PCT/CN2019/108277 2018-09-27 2019-09-26 Procédé et appareil de communication WO2020063782A1 (fr)

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