WO2020143751A1 - Procédé et appareil de communication - Google Patents

Procédé et appareil de communication Download PDF

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Publication number
WO2020143751A1
WO2020143751A1 PCT/CN2020/071360 CN2020071360W WO2020143751A1 WO 2020143751 A1 WO2020143751 A1 WO 2020143751A1 CN 2020071360 W CN2020071360 W CN 2020071360W WO 2020143751 A1 WO2020143751 A1 WO 2020143751A1
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WO
WIPO (PCT)
Prior art keywords
power saving
reference signal
signal
saving signal
transmission resource
Prior art date
Application number
PCT/CN2020/071360
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English (en)
Chinese (zh)
Inventor
铁晓磊
周涵
花梦
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华为技术有限公司
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Publication of WO2020143751A1 publication Critical patent/WO2020143751A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0235—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a power saving command
    • 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

  • This application relates to the field of communications, and in particular to a communication method and a communication device.
  • the terminal device In order to reduce power consumption, the terminal device usually enters the sleep state when it is in the idle state. At intervals, the terminal device detects the wake-up signal. If the wake-up signal is detected, the terminal device enters the wake-up state from the sleep state and executes related Processing, for example, synchronization, channel estimation, beam training, etc.
  • a method for waking up the terminal device is to wake up the terminal device through a reference signal, which is a wake-up signal, and the terminal device is woken up and performs corresponding processing based on the reference signal.
  • the terminal device does not necessarily need to perform processing related to the reference signal.
  • the discontinuous reception (DRX) period is usually less than the transmission period of the tracking reference signal (TRS).
  • TRS tracking reference signal
  • the present application provides a communication method and a communication apparatus.
  • a network device transmits a power saving signal having an association relationship with a reference signal, so that the terminal device can perform corresponding processing based on the reference signal when necessary, for example, performing synchronization processing, Thereby reducing the power consumption of the terminal device.
  • a communication method including: detecting a power saving signal; determining whether a reference signal exists on a transmission resource according to the detection result of the power saving signal, the reference signal is a tracking reference signal, or a channel estimation reference Signal, or, beam training reference signal.
  • the network device when the network device needs the terminal device to report the channel quality, it can send a power saving signal to the terminal device. After detecting the power saving signal, the terminal device receives the channel estimation reference signal on the transmission resource, and performs the channel according to the channel estimation reference signal. estimate. It can be seen that the terminal device performing the above method can receive the reference signal when necessary, reducing the frequency of receiving the reference signal, thereby reducing power consumption.
  • the time domain length of the power saving signal is smaller than the time domain length of the reference signal, and/or, the frequency domain width of the power saving signal is smaller than the frequency domain width of the reference signal.
  • the power saving signal provided by the present application as a wake-up signal can reduce resource overhead.
  • the power-saving signal can multiplex a partial sequence of the reference signal, which can reduce the complexity of the terminal device detecting the power-saving signal.
  • determining whether there is a reference signal on the transmission resource according to whether the power saving signal is detected includes: when the power saving signal is detected, determining that there is a reference signal on the transmission resource; or, when no power saving signal is detected When it is determined that there is no reference signal on the transmission resource.
  • the terminal device only needs to determine whether the power saving signal is detected, and does not need to determine whether there is a reference signal on the transmission resource based on the content carried by the power saving signal. Therefore, the above solution has the characteristics of simple and easy implementation.
  • the communication method further includes: when it is determined that there is no reference signal on the transmission resource, maintaining the sleep state.
  • the terminal device does not detect the power saving signal, so the terminal device can remain in a sleep state to reduce power consumption.
  • determining whether the reference signal exists on the transmission resource according to whether the power saving signal is detected includes: when the power saving signal is detected, determining whether the reference signal exists on the transmission resource according to the attribute of the power saving signal; or, When the power saving signal is not detected, it is determined that there is no reference signal on the transmission resource.
  • the above solution enables the terminal device to do more processing based on the power saving signal. For example, after determining that there is no reference signal on the transmission resource based on the attribute of the power saving signal, it can also monitor other channels based on the power saving signal (for example, physical Downlink control channel).
  • determining whether a reference signal exists on the transmission resource according to the attribute of the power saving signal includes: when the sequence carried by the power saving signal is the first sequence, determining that there is a reference signal on the transmission resource; or, when the power saving When the sequence carried by the signal is the second sequence, it is determined that there is no reference signal on the transmission resource.
  • the power saving signal can multiplex the sequence of reference signals, determining whether there is a reference signal on the transmission resource based on the sequence can reduce the complexity of the terminal device detecting the power saving signal.
  • detecting the power saving signal includes: detecting the power saving signal within a preset time period.
  • the network device may also configure (for example, a semi-static configuration) the transmission period of the reference signal, and the terminal device detects the power saving signal within a preset period based on the transmission period of the reference signal, thereby further reducing the power consumption of the terminal device.
  • the preset time period is the time period during which the network device sends the reference signal.
  • the present application provides another communication method, including: determining whether to send a reference signal, the reference signal is a tracking reference signal, or, a channel estimation reference signal, or, a beam training reference signal;
  • the power saving signal is transmitted; or, when it is determined that the reference signal is not transmitted, the power saving signal is not transmitted;
  • the power saving signal of the first attribute is transmitted; or, when it is determined that the reference signal is not transmitted, the power saving signal of the second attribute is transmitted;
  • the power saving signal of the first attribute is transmitted; or, when it is determined that the reference signal is not transmitted but the power saving signal needs to be transmitted, the power saving signal of the second attribute is transmitted; or, when it is determined that the reference is transmitted When the signal does not need to send the power saving signal, the power saving signal is not sent.
  • the network device first determines whether a reference signal needs to be sent, and sends a power saving signal to the terminal device when the reference signal needs to be sent, to instruct the terminal device to receive the reference signal; when no reference signal needs to be sent, the power saving signal may not be sent .
  • the network device may also send the power saving signal of the first attribute to the terminal device when the reference signal needs to be sent, and send the power saving signal of the second attribute to the terminal device when the reference signal does not need to be sent.
  • the above solution can reduce the information overhead and power consumption of network devices.
  • the time domain length of the power saving signal is smaller than the time domain length of the reference signal, and/or, the frequency domain width of the power saving signal is smaller than the frequency domain width of the reference signal.
  • the power saving signal provided by the present application as a wake-up signal can reduce resource overhead.
  • the power-saving signal can multiplex a partial sequence of the reference signal, which can reduce the complexity of the terminal device detecting the power-saving signal.
  • the power saving signal of the first attribute is a power saving signal carrying the first sequence
  • the power saving signal of the second attribute is a power saving signal carrying the second sequence
  • the first sequence is used
  • the second sequence is used to indicate that there is no reference signal on the transmission resource.
  • the power saving signal can multiplex the sequence of reference signals, determining whether there is a reference signal on the transmission resource based on the sequence can reduce the complexity of the terminal device detecting the power saving signal.
  • sending the power saving signal includes: sending the power saving signal within a preset time period; or,
  • Sending the power saving signal of the first attribute includes: sending the power saving signal of the first attribute within a preset time period, or,
  • Sending the power saving signal of the second attribute includes: sending the power saving signal of the second attribute within a preset time period.
  • the network device may configure (for example, a semi-static configuration) the transmission period of the reference signal, so that the terminal device detects the power saving signal within a preset period based on the transmission period of the reference signal, so that the power consumption of the terminal device can be further reduced.
  • the preset time period is the time period during which the network device sends the reference signal.
  • the present application provides a communication device, which may be a terminal device or a chip in the terminal device.
  • the device may include a processing unit and a transceiver unit.
  • the processing unit may be a processor, and the transceiving 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, the processing The unit executes the instructions stored in the storage unit, so that the terminal device executes the method described in the first aspect.
  • the processing unit may be a processor, and the transceiving unit may be an input/output interface, a pin, or a circuit, etc.; the processing unit executes instructions stored in the storage unit to enable the terminal
  • the device performs the method described in the first aspect, and the storage unit may be a storage unit within the chip (eg, registers, cache, etc.), or may be a storage unit outside the chip within the terminal device (eg, read-only) Memory, random access memory, etc.).
  • the present application provides another communication device, which may be a network device or a chip in the network device.
  • the device may include a processing unit and a transceiver unit.
  • the processing unit may be a processor
  • the transceiver unit may be a transceiver
  • the network device may further include a storage unit, which may be a memory; the storage unit is used to store instructions, the processing The unit executes the instructions stored by the storage unit, so that the network device performs the method described in the second aspect.
  • the processing unit may be a processor, and the transceiver unit may be an input/output interface, a pin, or a circuit, etc.; the processing unit executes instructions stored in the storage unit to enable the network
  • the device performs the method described in the second aspect.
  • the storage unit may be a storage unit within the chip (eg, registers, cache, etc.), or a storage unit outside the chip within the network device (eg, read-only) Memory, random access memory, etc.).
  • the present application provides a computer-readable storage medium in which a computer program is stored.
  • the processor is caused to execute the method described in the first aspect.
  • the present application provides a computer-readable storage medium in which a computer program is stored.
  • the processor is caused to perform the method described in the second aspect.
  • the present application provides a computer program product, the computer program product comprising: computer program code, when the computer program code is executed by a processor, the processor is caused to execute the method described in the first aspect.
  • the present application provides a computer program product, the computer program product comprising: computer program code, when the computer program code is executed by a processor, causing the processor to execute the method described in the second aspect.
  • FIG. 1 is a schematic diagram of a communication system suitable for this application.
  • FIG. 2 is a schematic diagram of a DRX cycle applicable to this application.
  • FIG. 3 is a schematic diagram of a communication method provided by this application.
  • FIG. 4 is a schematic diagram of a time-frequency resource occupied by a power saving signal provided by this application;
  • FIG. 5 is a schematic diagram of another power-saving time-frequency resource occupied by a signal provided by this application.
  • FIG. 6 is a schematic diagram of another time-frequency resource occupied by a power saving signal provided by this application.
  • FIG. 7 shows a schematic diagram of another example of the communication method provided by the present application.
  • FIG. 8 is a schematic diagram of a communication device provided by this application.
  • FIG. 9 is a schematic diagram of a terminal device provided by this application.
  • FIG. 10 is a schematic diagram of a network device provided by this application.
  • FIG. 1 is a schematic diagram of a communication system suitable for the present application.
  • the communication system 100 includes a network device 110 and a terminal device 120.
  • the terminal device 120 communicates with the network device 110 through electromagnetic waves.
  • the terminal device 120 may include a variety of handheld devices, in-vehicle device having a wireless communication function, wearable device, computing device, or other processing device connected to a wireless modem, for example, the Third Generation Partnership Project (3 rd Generation partnership project (3GPP) defined user equipment (UE), mobile station (mobile station, MS), soft terminal, home gateway, set-top box, etc.
  • 3GPP Third Generation Partnership Project
  • UE mobile station
  • MS mobile station
  • soft terminal home gateway
  • set-top box set-top box
  • the network device 110 may be a base station defined by 3GPP, for example, a base station (gNB) in a 5G communication system.
  • the network device 110 may also be a non-3GPP (non-3GPP) access network device, such as an access gateway (access gateway (AGF)).
  • the network device 110 may also be a relay station, an access point, an in-vehicle device, a wearable device, and other types of devices.
  • the communication system 100 is only an example, and the communication system to which the present application is applied is not limited thereto.
  • the number of network devices and terminal devices included in the communication system 100 may be other numbers.
  • the terminal device 120 in the connected state will continuously try to receive the physical downlink control channel (physical downlink control channel, PDCCH).
  • the terminal device 120 may start an inactive timer (inactive timer).
  • the downlink control information (downlink control information, DCI) schedules the newly transmitted data, and the terminal device 120 resets the inactive timer.
  • DRX-onDurationTimer DRX duration timer
  • DRX-InactivityTimer DRX inactivity timer
  • DRX-RetransmissionTimerDL DRX downlink retransmission timer
  • DRX-RetransmissionTimerUL DRX uplink retransmission timer
  • the DRX-InactivityTimer is started when the terminal device receives a PDCCH indication of a new downlink or uplink transmission. During the timing of the DRX-InactivityTimer, the terminal device is in an active state.
  • the terminal device sends the physical uplink control channel (PUCCH) or physical uplink shared channel (hybrid automatic repeat request, HARQ) feedback information to the network device, the physical uplink shared channel (PUCCH) physical link (shared channel, PUSCH), it will start the downlink HARQ round-trip time timer (HARQ-RTT-TimerDL), HARQ-RTT-TimerDL means that the network device will not immediately retransmit occur, so HARQ-RTT-TimerDL timing period , Allowing the terminal device to enter the inactive state, that is, it may not monitor the PDCCH.
  • PUCCH physical uplink control channel
  • HARQ hybrid automatic repeat request
  • DRX-RetransmissionTimerDL When HARQ-RTT-TimerDL times out, if there is data that fails to decode in the terminal device, DRX-RetransmissionTimerDL is started. During the timing of DRX-RetransmissionTimerDL, the terminal device is in the activated state.
  • the following is the downlink transmission process of the terminal device in the radio resource control (resource, resource, control, RRC) connected 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 transmission of data indicates the start of a HARQ process.
  • Step 3 The terminal device decodes downlink control information (downlink control information, DCI) in the PDCCH, and receives the PDSCH based on the DCI.
  • DCI downlink control information
  • Step 4 The terminal device carries HARQ feedback information in the PUCCH or PUSCH and sends it to the network device.
  • Step 5 The terminal device starts the HARQ-RTT-TimerDL corresponding to the HARQ process after the first symbol after sending all symbols of the PUCCH or PUSCH carrying HARQ feedback information.
  • Step 6 When HARQ-RTT-TimerDL times out, if there is a transport block (TB) in the previous PDSCH that failed to be decoded, the terminal device will start DRX-RetransmissionTimerDL. During the timing of DRX-RetransmissionTimerDL, proceed to step 7. If all the previous PDSCHs are successfully decoded, the terminal device does not start DRX-RetransmissionTimerDL.
  • TB transport block
  • Step 7 During the timing of DRX-RetransmissionTimerDL, the terminal device is in the activated state and starts to blindly detect the PDCCH. If the terminal device detects retransmission DCI during DRX-RetransmissionTimerDL timing, it closes DRX-RetransmissionTimerDL and receives PDSCH based on the retransmission DCI. After decoding the PDSCH, steps 4 to 7 are performed.
  • the length of HARQ-RTT-TimerDL is configured by the network device. Specifically, the length of HARQ-RTT-TimerDL is related to the time K3 when the network device processes the HARQ feedback information, where K3 indicates that the HARQ feedback information of a certain HARQ process sent from the terminal device is received from the network device, and then the HARQ feedback information is processed to determine Time to retransmit data.
  • the DRX cycle is shown in Figure 2. It should be noted that the terminal device 120 may be awakened for time-frequency synchronization within a period of time (for example, several time slots) before the DRX-onDurationTimer is started, to prevent the terminal device 120 from deviating in time and frequency domain due to long sleep At the same time, the UE may also try to receive the system message first to prevent the terminal device 120 from moving from one cell to another cell, the system message of the other cell is different from the original cell.
  • a period of time for example, several time slots
  • the terminal device 120 needs to periodically monitor the signals sent by the network device 110 from the sleep state to the awake state, for example, to monitor the TRS and perform time-frequency synchronization according to the received TRS, but time-frequency synchronization is not required for each wake-up stage.
  • the present application provides a communication method 300.
  • the communication method 300 may be applied to the communication system shown in FIG. 1, for example, may be executed by the terminal device 120, or may be executed by a chip in the terminal device 120.
  • the "terminal equipment” and “network equipment” described below are no longer accompanied by reference signs.
  • the method 300 includes:
  • the power saving signal may be a wakeup signal (WUS) or a sleep signal (go-to-sleep signal, GTS).
  • WUS wakeup signal
  • GTS go-to-sleep signal
  • the reference signal is a tracking reference signal, or a channel estimation reference signal, or a beam training reference signal.
  • the duration of the DRX cycle is usually fixed or semi-statically configured, not every task that needs to be processed by the terminal device during the wake-up phase. Therefore, if the network device needs to instruct the terminal device to process the task during the wake-up phase (for example, receive information) , The network device will send a power saving signal to the terminal device, and the terminal device will perform the corresponding operation after receiving the power saving signal; if the terminal device does not need to process tasks during the wake-up phase, the network device may not send the power saving signal, the terminal The device can enter the sleep state without receiving the power saving signal to save power.
  • the terminal device detects the power saving signal, the terminal device determines that there is a reference signal on the transmission resource, and can receive the reference signal on the transmission resource to facilitate the reference signal based Perform the corresponding operation; if the terminal device does not detect the power saving signal, the terminal device determines that there is no reference signal on the transmission resource, and can enter the sleep state to save power consumption, or can perform other operations, such as monitoring PDCCH.
  • the association relationship between the power saving signal and the reference signal may be defined by a communication protocol, or may be configured by a network device.
  • the above transmission resources may be defined by the communication protocol or configured by the network device.
  • the above reference signal may be a TRS, a channel estimation reference signal or a beam training reference signal.
  • the network device When the network device determines that the terminal device needs to perform time-frequency synchronization, it can send a power saving signal to the terminal device. After detecting the power saving signal, the terminal device receives TRS on the transmission resource and performs time-frequency synchronization according to the TRS.
  • the network device When the network device needs the terminal device to report the channel quality, it can send a power saving signal to the terminal device. After detecting the power saving signal, the terminal device receives the channel estimation reference signal on the transmission resource and performs channel estimation according to the channel estimation reference signal.
  • the network device When the network device needs the terminal device to train a beam, it can send a power saving signal to the terminal device. After detecting the power saving signal, the terminal device receives the beam training reference signal on the transmission resource and performs beam training according to the beam training reference signal.
  • the reference signal is an example of a beam training signal.
  • the beam training signal is used for terminal device training to obtain the best receiving beam.
  • the terminal device detects a power saving signal, it is determined that the network device will send a beam training wave reference signal, so that the terminal The device uses the beam training reference signal to find the receive beam that receives the subsequent signal or channel.
  • the terminal device applying the method 300 can receive the reference signal when necessary, reducing the frequency of receiving the reference signal, thereby reducing power consumption.
  • the network device For a network device, the network device first determines whether a reference signal needs to be sent. When a reference signal needs to be sent, a power saving signal is sent to the terminal device to instruct the terminal device to receive the reference signal; when a reference signal is not needed, it can be No power saving signal is sent, thereby reducing the information overhead and power consumption of network devices.
  • the above gives an example in which the terminal device determines whether a reference signal exists on the transmission resource according to whether the power saving signal is detected.
  • the terminal device may also determine whether the reference signal exists on the transmission resource according to the attribute of the power saving signal.
  • the network device may send a power saving signal that carries the first sequence; when the network device considers that the resources are insufficient, it cannot send the reference signal or When the terminal does not currently need to use the reference signal, the network determines not to send the reference signal, and the network device may send a power saving signal carrying the second sequence.
  • the terminal device After receiving the power saving signal, the terminal device determines whether there is a reference signal on the transmission resource according to different sequences. If the sequence carried by the power saving signal is the first sequence, the terminal device determines that there is a reference signal on the transmission resource and can receive the reference signal on the transmission resource; if the sequence carried by the power saving signal is the second sequence, the terminal device determines the transmission There is no reference signal on the resource. At this time, the terminal device may not receive the reference signal on the transmission resource to perform time-frequency synchronization or channel state estimation or receive beam training, but the terminal still needs to wake up to monitor the PDCCH, which can reduce the reception Reference the frequency of the signal while avoiding adverse effects on other services.
  • the terminal device if the terminal device does not detect the power saving signal carrying the first sequence or the second sequence, the terminal device will also determine that there is no reference signal on the transmission resource, and can enter the sleep state or execute Other operations, such as monitoring the PDCCH, can reduce the frequency of receiving the reference signal while avoiding adversely affecting other services.
  • the attribute of the power saving signal can also be the value of the bit field.
  • the meaning of different values is different. For example, when the bit field value is "0", it means that there is no reference signal on the transmission resource. ; When the value of the bit field is "1", it indicates that there is a reference signal on the transmission resource.
  • the value of the bit domain of the power saving signal may also be other values.
  • the network device may also configure (for example, a semi-static configuration) the transmission period of the reference signal, and the terminal device detects the power saving signal within a preset period based on the transmission period of the reference signal, thereby further reducing the power consumption of the terminal device.
  • the preset time period is the time period during which the network device sends the reference signal.
  • the terminal device may determine that a reference signal exists on the transmission resource; if the terminal device does not detect power consumption within the preset period of time If the signal is saved, the terminal device may determine that there is no reference signal on the transmission resource.
  • the terminal device when the terminal device detects the power saving signal, the terminal needs to process the reference signal, and detect the PDCCH detection in the corresponding connected mode DRX (connected mode DRX, C-DRX) cycle, and receive the corresponding PDSCH schedule.
  • the terminal device may determine that there is a reference signal on the transmission resource; if the terminal device is within the preset period of time If the power saving signal carrying the second sequence is detected within the period, the terminal device may determine that there is no reference signal on the transmission resource; if the terminal device does not detect the power saving signal carrying the first sequence within a preset period of time, nor When the power saving signal carrying the second sequence is detected, the terminal device may determine that there is no reference signal on the transmission resource.
  • the terminal when the terminal detects sequence 1, the terminal wakes up and uses the reference signal for time-frequency tracking or channel state measurement or beam training, and at the same time, the terminal processes the PDCCH within the C-DRX duration (on duration);
  • Sequence 2 the terminal determines that the network device does not send the reference signal, but the terminal determines that the network device will schedule data within the corresponding C-DRX cycle, so the terminal will detect the PDCCH within the corresponding C-DRX cycle;
  • the terminal does not detect the power saving signal, the terminal determines that the network device does not send the reference signal, nor does it schedule the terminal within the associated C-DRX cycle, and the terminal continues to sleep.
  • the time domain length of the power saving signal 1 is smaller than the time domain length of the reference signal.
  • the frequency domain length of the power saving signal 1 may be greater than, less than, or equal to the time domain length of the reference signal.
  • the time-frequency area occupied by the power saving signal 1 does not overlap or partially overlaps the time-frequency area occupied by the reference signal. As shown in FIG. 4, the shaded portion is the time-frequency area occupied by the power saving signal 1, and the unshaded rectangle indicates the time-frequency area occupied by the reference signal.
  • the frequency domain of the power saving signal 1 partially overlaps or completely overlaps or does not overlap with the frequency domain of the reference signal, and the start position of the time domain of the power saving signal 1 is before or before the start position of the time domain of the reference signal
  • the two start time domains are in the same position.
  • the shaded portion indicates the range of the time-frequency region occupied by the power-saving signal 1, but the power-saving signal 1 does not necessarily completely occupy the time-frequency region.
  • the power-saving signal 1 only occupies the time-frequency region Several resource units (resource, element, RE).
  • the reference signal may also occupy only a few REs.
  • the power saving signal 1 can multiplex part of the reference signal. Therefore, in this case, the power saving signal 1 can also be called a partial reference signal, and the reference signal occupying the area 2 can be called a full reference signal. .
  • reference signal refers to "complete reference signal”.
  • the time domain range of region 1 is symbol 0 to symbol 6, and the time domain range of region 2 is symbol 0 to symbol 13.
  • the power saving signal and the reference signal may be orthogonal Frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) can also be code division multiplexing. If the terminal device detects part of the reference signals on symbols 0 to 6, the terminal device determines that the power saving signal 1 has been received, and the terminal device may continue to receive the remaining reference signals on symbols 7 to 13, and the remaining reference signals The signal and the previously stored part of the reference signal are combined to perform corresponding operations, such as time-frequency offset tracking, channel state estimation, or beam training.
  • the terminal device determines that there are no reference signals on symbols 0 to 13 (ie, the transmission resources described in S320). Among them, the sequence of the power saving signal 1 on the symbols 0 to 6 may multiplex the partial sequence of the reference signal.
  • the time domain range of region 1 is symbol 0 to symbol 6, and the time domain range of region 2 is symbol 2 to symbol 13. If the terminal device detects part of the reference signals on symbols 0 to 6, the terminal device determines that the power saving signal 1 has been received, and the terminal device may continue to receive the remaining reference signals on symbols 7 to 13, and the remaining reference signals The signal and the previously stored part of the reference signal are combined to perform the corresponding operation. If the terminal device does not detect part of the reference signal on symbols 0 to 6, the terminal device determines that there is no reference signal on symbols 2 to 13. Among them, the sequence of the power saving signal 1 on the symbols 2 to 6 may multiplex the partial sequence of the reference signal.
  • whether the power saving signal 1 is detected is used as a basis for determining whether a reference signal exists on the transmission resource.
  • the terminal device may also determine whether there is a reference signal on the transmission resource according to the sequence of the power saving signal 1.
  • the power saving signal 1 as a wake-up signal can reduce resource overhead.
  • the power-saving signal 1 can multiplex a partial sequence of the reference signal, which can reduce the complexity of the terminal device detecting the power-saving signal 1.
  • the terminal device can also determine whether there is a reference signal on the transmission resource without waiting for the power saving signal 1 to be completely decoded.
  • the terminal device detects and parses a partial sequence on the symbols 0 to 2, and if the partial sequence belongs to the sequence of the power saving signal 1, the terminal device can determine that the power saving signal 1 is received; if the partial sequence If it does not belong to the sequence of the power saving signal 1, the terminal device can determine that the power saving signal 1 is not received, so that it can enter the sleep state in advance and reduce the power consumption.
  • the frequency domain width of the power saving signal 2 is smaller than the frequency domain width of the reference signal.
  • the time domain width of the power saving signal 2 may be greater than, less than, or equal to the time domain width of the reference signal.
  • the time-frequency area occupied by the power saving signal 2 does not overlap or partially overlaps the time-frequency area occupied by the reference signal. As shown in FIG. 5, the shaded portion is the time-frequency area occupied by the power saving signal 2, and the unshaded rectangle indicates the time-frequency area occupied by the reference signal.
  • the frequency domain of the power saving signal 2 partially overlaps or does not overlap the frequency domain of the reference signal
  • the time domain of the power saving signal 2 partially overlaps or does not overlap the time domain of the reference signal
  • the power saving signal The time domain start position of 2 is before the time domain start position of the reference signal.
  • the shaded portion indicates the range of the time-frequency region occupied by the power-saving signal 2, but the power-saving signal 2 does not necessarily completely occupy the time-frequency region.
  • the power-saving signal 2 only occupies the time-frequency region Of several REs.
  • the reference signal may also occupy only a few REs.
  • the power saving signal 2 can multiplex part of the reference signal. Therefore, in this case, the power saving signal 2 can also be called a partial reference signal, and the reference signal occupying the area 2 can be called a complete reference signal.
  • the frequency domain size of region 1 is a bandwidth corresponding to 24 resource blocks (resource blocks, RB), and the frequency domain size of region 2 is a bandwidth corresponding to 72 RBs. If the terminal device detects part of the reference signal on the bandwidth corresponding to the 24 RBs, the terminal device determines that the power saving signal 2 is received, and the terminal device may continue to receive the remaining reference signals on the bandwidth corresponding to 72 RBs. If the terminal device does not detect part of the reference signal on the bandwidth corresponding to the 24 RBs, the terminal device determines that there is no reference signal on the bandwidth corresponding to 72 RBs (that is, the transmission resources described in S320). Wherein, if the time-frequency region of the power-saving signal 2 partially overlaps with the time-frequency region of the reference signal, the sequence of the power-saving signal 2 on the bandwidth corresponding to the 24 RBs may multiplex the partial sequence of the reference signal.
  • whether the power saving signal 2 is detected is used as a basis for determining whether a reference signal exists on the transmission resource.
  • the terminal device may also determine whether the reference signal exists on the transmission resource according to the sequence of the power saving signal 2.
  • the power-saving signal 2 as a wake-up signal can reduce the power consumption of detecting the power-saving signal and reduce resource overhead.
  • the power-saving signal 2 can multiplex a partial sequence of the reference signal, which can reduce the complexity of the terminal device detecting the power-saving signal 2.
  • the time domain length of the power saving signal 3 is smaller than the time domain length of the reference signal, and the frequency domain width of the power saving signal 3 is smaller than the frequency domain width of the reference signal.
  • the time-frequency area occupied by the power saving signal 3 does not overlap or partially overlaps the time-frequency area occupied by the reference signal. As shown in FIG. 6, the shaded portion is the time-frequency area occupied by the power saving signal 3, and the unshaded rectangle indicates the time-frequency area occupied by the reference signal.
  • the frequency domain of the power saving signal 3 partially overlaps or does not overlap the frequency domain of the reference signal
  • the time domain of the power saving signal 3 partially overlaps or does not overlap the time domain of the reference signal
  • the power saving signal The time domain start position of 3 is before the time domain start position of the reference signal or the two time domain start positions are the same.
  • the shaded portion indicates the range of the time-frequency region occupied by the power-saving signal 3, but the power-saving signal 3 does not necessarily completely occupy the time-frequency region, for example, the power-saving signal 3 only occupies the time-frequency region Of several REs. Similarly, the reference signal may also occupy only a few REs.
  • the power saving signal 3 can multiplex part of the reference signal. Therefore, in this case, the power saving signal 3 can also be called a partial reference signal, and the reference signal occupying the area 2 can be called a complete reference signal.
  • the time domain range of region 1 is symbol 0 to symbol 6
  • the time domain range of region 2 is symbol 2 to symbol 13
  • the frequency domain size of region 1 is the bandwidth corresponding to 24 RBs
  • the frequency domain size of region 2 is 72 The bandwidth corresponding to each RB. If the terminal device detects and parses a partial sequence on symbols 0 to 1, and the partial sequence belongs to the sequence of the power saving signal 3, the terminal device can determine that the power saving signal 3 is received, and the terminal device can continue to Reference symbols are received on symbols 2 to 13 and on the bandwidth corresponding to 72 RBs.
  • the terminal device detects and parses a partial sequence on symbols 0 to 1, and the partial sequence does not belong to the power saving signal 3 sequence, or if the terminal device does not detect a partial reference signal on symbols 0 to 6 , Then the terminal device determines that there is no reference signal on symbols 2 to 13. Among them, the sequence of the power saving signal 3 on the symbols 2 to 6 may multiplex the partial sequence of the reference signal.
  • whether the power saving signal 3 is detected is used as a basis for determining whether there is a reference signal on the transmission resource.
  • the terminal device can also determine whether there is a reference signal on the transmission resource according to the sequence of the power saving signal 3.
  • the power saving signal 3 as the wake-up signal can reduce resource overhead.
  • the complexity of the terminal device detecting the power saving signal 3 can also be reduced.
  • FIG. 7 shows another example of the communication method provided by the present application.
  • FIG. 7 shows four connected mode DRX (connected mode DRX, C-DRX) cycles, and the network device configures the lengths of DRX-onDurationTimer and DRX-InactivityTimer for each C-DRX cycle in advance.
  • the large dashed box represents the time-frequency region occupied by the reference signal, and the network device does not send the reference signal in the time-frequency region;
  • the small dashed box represents the time-frequency region occupied by the wake-up signal, and the network device is not at this time
  • the wake-up signal is sent in the frequency area;
  • the shaded area indicates the time-frequency area occupied by the wake-up signal, and the network device sends the wake-up signal in the time-frequency area;
  • the solid line box containing the shaded area indicates the time-frequency area occupied by the reference signal, and the network The device sent a reference signal in this time-frequency region.
  • the network device is configured with 4 wake-up signal transmission opportunities (occasion) and 1 reference signal transmission opportunity.
  • the terminal device needs to detect the wake-up signal according to the pattern of the partial reference signal at each wake-up signal transmission opportunity.
  • the terminal device determines that the reference signal transmission time before C-DRX cycle 1 does not exist With reference to the signal, the terminal device can monitor the PDCCH and the physical downlink shared channel (PDSCH) during the wake-up phase of C-DRX cycle 1 according to the wake-up signal.
  • PDSCH physical downlink shared channel
  • the terminal device determines to stay in the sleep state, does not detect the reference signal, and does not monitor the PDCCH and PDSCH.
  • the terminal device can detect the wake-up signal according to the pattern of the complete reference signal, and perform time-frequency synchronization, channel estimation, or beam based on the reference signal after the wake-up signal is detected. Operations such as training.
  • Each wake-up signal shown in FIG. 7 is the power-saving signal 3, and optionally, the power-saving signal 1 and the power-saving signal 2 may also be used as the wake-up signal.
  • multiple terminal devices can multiplex the same sequence through methods such as code division or frequency shift.
  • the above mainly describes the communication method provided by the present application from the perspective of a terminal device.
  • the processing procedure of the network device has a corresponding relationship with the processing procedure of the terminal device.
  • the terminal device receives information from the network device, which means that the network device sends the information ;
  • the terminal device sends information to the network device, meaning that the network device receives the information from the terminal device. Therefore, even if the processing procedure of the network device is not explicitly stated in the individual places above, those skilled in the art can clearly understand the processing procedure of the network device based on the processing procedure of the terminal device.
  • the communication device includes a hardware structure and/or a software module corresponding to each function.
  • the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is performed by hardware or computer software driven hardware depends on the specific application of the technical solution and design constraints. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.
  • the present application may divide the functional unit of the communication device according to the above method example.
  • each function may be divided into various functional units, or two or more functions may be integrated into one processing unit.
  • the above integrated unit can be implemented in the form of hardware or software function unit. It should be noted that the division of the units in this application is schematic, and is only a division of logical functions. In actual implementation, there may be another division manner.
  • FIG. 8 shows a schematic structural diagram of a communication device provided by the present application.
  • the communication device 800 may be used to implement the method described in the above method embodiments.
  • the communication device 800 may be a chip, a network device, or a terminal device.
  • the communication device 800 includes one or more processors 801, and the one or more processors 801 may support the communication device 800 to implement the method in the method embodiment corresponding to FIG.
  • the processor 801 may be a general-purpose processor or a dedicated processor.
  • the processor 801 may be a central processing unit (CPU) or a baseband processor.
  • the baseband processor can be used to process communication data (for example, the power saving signal described above), and the CPU can be used to control communication devices (for example, network devices, terminal devices, or chips), execute software programs, and process software Program data.
  • the communication device 800 may further include a transceiving unit 805 to implement signal input (reception) and output (transmission).
  • the communication device 800 may be a chip, and the transceiver unit 805 may be an input and/or output circuit of the chip, or the transceiver unit 805 may be a communication interface of the chip, and the chip may serve as a terminal device or a network device or other wireless communication Components of the device.
  • the communication device 800 may include one or more memories 802 on which a program 804 is stored.
  • the program 804 may be executed by the processor 801 to generate instructions 803, so that the processor 801 executes the method described in the above method embodiments according to the instructions 803.
  • the memory 802 may also store data.
  • the processor 801 may also read the data stored in the memory 802, the data may be stored at the same storage address as the program 804, or the data may be stored at a different storage address than the program 804.
  • the processor 801 and the memory 802 may be set separately, or may be integrated together, for example, integrated on a single board or a system on chip (SOC).
  • SOC system on chip
  • the communication device 800 may further include a transceiver unit 805 and an antenna 806.
  • the transceiver unit 805 may be called a transceiver, a transceiver circuit, or a transceiver, and is used to implement the transceiver function of the communication device through the antenna 806.
  • the processor 801 is used to send a power saving signal to the terminal device through the transceiver unit 805 and the antenna 806.
  • the processor 801 is used to receive the power saving signal from the network device through the transceiver unit 805 and the antenna 806.
  • the processor 801 may be a CPU, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable logic devices For example, discrete gates, transistor logic devices or discrete hardware components.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • the present application also provides a computer program product which, when executed by the processor 801, implements the communication method described in any method embodiment of the present application.
  • the computer program product may be stored in the memory 802, for example, the program 804, which is finally converted into an executable object file that can be executed by the processor 801 after preprocessing, compiling, assembling, and linking.
  • the present application also provides a computer-readable storage medium on which a computer program is stored, which when executed by a computer implements the communication method described in any of the method embodiments of the present application.
  • the computer program may be a high-level language program or an executable target program.
  • the computer-readable storage medium is, for example, the memory 802.
  • the memory 802 may be a volatile memory or a non-volatile memory, or the memory 802 may include both a volatile memory and a non-volatile memory.
  • the non-volatile memory can be read-only memory (read-only memory, ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), electronically Erasable programmable read-only memory (electrically EPROM, EEPROM) or flash memory.
  • Volatile memory can be random access memory (random access memory, RAM), which acts as an external cache.
  • RAM random access memory
  • SRAM static random access memory
  • DRAM dynamic random access memory
  • DRAM synchronous dynamic random access memory
  • SDRAM synchronous dynamic random access memory
  • double data rate synchronous dynamic random access memory double data SDRAM, DDR SDRAM
  • enhanced synchronous dynamic random access memory enhanced SDRAM, ESDRAM
  • serial link DRAM SLDRAM
  • direct RAMbus RAM direct RAMbus RAM
  • FIG. 9 shows a schematic structural diagram of a terminal device provided by the present application.
  • the terminal device 900 may be applied to the system shown in FIG. 1 to implement the functions of the terminal device in the foregoing method embodiments.
  • FIG. 9 shows only the main components of the terminal device.
  • the terminal device 900 includes a processor, a memory, a control circuit, an antenna, and input/output devices.
  • the processor is mainly used for processing communication protocols and communication data, and for controlling the entire terminal device. For example, the processor receives power saving signals through the antenna and control circuit.
  • the memory is mainly used to store programs and data, such as storing communication protocols and data to be sent.
  • the control circuit is mainly used for the conversion of the baseband signal and the radio frequency signal and the processing of the radio frequency signal.
  • the control circuit and the antenna can also be called a transceiver, which is mainly used to send and receive radio frequency signals in the form of electromagnetic waves.
  • the input and output device is, for example, a touch screen or a keyboard, and is mainly used to receive data input by the user and output data to the user.
  • the processor can read the program in the memory, interpret and execute the instructions contained in the program, and process the data in the program.
  • the processor performs baseband processing on the information to be sent, and outputs the baseband signal to the radio frequency circuit.
  • the radio frequency circuit processes the baseband signal after radio frequency processing to obtain the radio frequency signal, and passes the radio frequency signal through the antenna in the form of electromagnetic waves Send outside.
  • the electromagnetic wave carrying information ie, radio frequency signal
  • the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, and the processor converts the baseband signal into information And process the information.
  • FIG. 9 only shows one memory and one processor. In an actual terminal device, there may be multiple processors and multiple memories.
  • the memory may also be referred to as a storage medium or storage device, etc., which is not limited in this application.
  • the processor in FIG. 9 may integrate the functions of the baseband processor and the CPU.
  • the baseband processor and the CPU may also be independent processors, which may be implemented through a bus or other technologies. interconnected.
  • the terminal device may include multiple baseband processors to adapt to different network standards, the terminal device may include multiple CPUs to enhance its processing capability, and various components of the terminal device may be connected through various buses.
  • the baseband processor may also be called a baseband processing circuit or a baseband processing chip.
  • the CPU may also be called a central processing circuit or a central processing chip.
  • the function of processing the communication protocol and the communication data may be built in the processor, or may be stored in the memory in the form of a program, and the processor executes the program in the memory to realize the baseband processing function.
  • an antenna and a control circuit with a transceiver function can be regarded as the transceiver unit 901 of the terminal device 900, which is used to support the terminal device to implement the receiving function in the method embodiment, or to support the terminal device to implement the method embodiment Send function in.
  • the processor with a processing function is regarded as the processing unit 902 of the terminal device 900.
  • the terminal device 900 includes a transceiving unit 901 and a processing unit 902.
  • the transceiver unit may also be called a transceiver, a transceiver, a transceiver device, or the like.
  • the device used to implement the receiving function in the transceiver unit 901 can be regarded as a receiving unit, and the device used to implement the sending function in the transceiver unit 901 can be regarded as a sending unit, that is, the transceiver unit 901 includes a receiving unit and a sending unit,
  • the receiving unit may also be called a receiver, an input port, a receiving circuit, etc.
  • the sending unit may be called a transmitter, a transmitter, or a transmitting circuit, etc.
  • the processor 902 may be used to execute a program stored in the memory to control the transceiver unit 901 to receive signals and/or send signals to complete the functions of the terminal device in the foregoing method embodiments.
  • the function of the transceiver unit 901 can be considered to be implemented by a transceiver circuit or a dedicated transceiver chip.
  • FIG. 10 is a schematic structural diagram of a network device provided by the present application.
  • the network device may be, for example, a base station.
  • the base station can be applied to the system shown in FIG. 1 to implement the functions of the network device in the foregoing method embodiments.
  • the base station 1000 may include one or more radio frequency units, such as a remote radio unit (RRU) 1001 and at least one baseband unit (BBU) 1002.
  • RRU remote radio unit
  • BBU baseband unit
  • the BBU 1002 may include a distributed unit (distributed unit, DU), and may also include a DU and a centralized unit (CU).
  • DU distributed unit
  • CU centralized unit
  • the RRU 1001 may be called a transceiver unit, a transceiver, a transceiver circuit, or a transceiver, and it may include at least one antenna 10011 and a radio frequency unit 10012.
  • RRU1001 is mainly used for the transmission and reception of radio frequency signals and the conversion of radio frequency signals and baseband signals, for example, for supporting the base station to implement the transmission function and the reception function in the method embodiment.
  • BBU1002 is mainly used for baseband processing and control of base stations.
  • RRU1001 and BBU1002 can be physically set together, or can be physically separated, that is, distributed base station.
  • BBU1002 can also be called a processing unit, mainly used to complete baseband processing functions, such as channel coding, multiplexing, modulation, spread spectrum, and so on.
  • the BBU1002 can be used to control the base station to perform the operation flow on the network device in the above method embodiments.
  • the BBU1002 can be composed of one or more boards, and multiple boards can jointly support a wireless access network of a single access standard (for example, a long term evolution (LTE) network), or can support different access standards separately. Wireless access network (such as LTE network and NR network).
  • the BBU 1002 also includes a memory 10021 and a processor 10022.
  • the memory 10021 is used to store necessary instructions and data.
  • the memory 10021 stores the power saving signal in the above method embodiment.
  • the processor 10022 is used to control the base station to perform necessary actions, for example, to control the base station to perform the operation flow in the foregoing method embodiment.
  • the memory 10021 and the processor 10022 may serve one or more single boards. In other words, the memory and the processor can be set separately on each board. It is also possible that multiple boards share the same memory and processor. In addition, each board can also be provided with necessary circuits.
  • the disclosed system, device, and method may be implemented in other ways. For example, some features of the method embodiments described above can be ignored or not implemented.
  • the device embodiments described above are only schematic. The division of units is only a division of logical functions. In actual implementation, there may be another division manner. Multiple units or components may be combined or integrated into another system.
  • the coupling between the units or the coupling between the components may be direct coupling or indirect coupling.
  • the coupling includes electrical, mechanical, or other forms of connection.
  • the size of the sequence number of each process does not mean the order of execution, and the execution order of each process should be determined by its function and inherent logic, and should not be applied to the embodiments of this application
  • the implementation process constitutes no limitation.
  • system and “network” are often used interchangeably herein.
  • the term “and/or” in this article is just an association relationship that describes the related objects, indicating that there can be three relationships, for example, A and/or B, which can mean: A exists alone, A and B exist simultaneously, separate There are three cases of B.
  • the character “/” in this article generally indicates that the related objects before and after it are in an “or” relationship.

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

Abstract

La présente invention concerne un procédé de communication. Le procédé comprend les étapes consistant à : détecter un signal d'économie de consommation d'énergie ; et selon le résultat de détection du signal d'économie de consommation d'énergie, déterminer s'il existe un signal de référence dans une ressource de transmission, le signal de référence étant un signal de référence de suivi, ou un signal de référence d'estimation de canal, ou un signal de référence d'apprentissage de faisceau. Par exemple lorsqu'il est nécessaire qu'un dispositif terminal rapporte une qualité de canal, un dispositif de réseau peut transmettre le signal d'économie de consommation d'énergie au dispositif terminal ; après détection du signal d'économie de consommation d'énergie, le dispositif terminal reçoit le signal de référence d'estimation de canal sur la ressource de transmission et effectue une estimation de canal selon le signal de référence d'estimation de canal. Par conséquent, le dispositif terminal qui exécute le procédé susmentionné peut recevoir le signal de référence si nécessaire, et réduit la fréquence de réception du signal de référence, réduisant ainsi la consommation d'énergie.
PCT/CN2020/071360 2019-01-11 2020-01-10 Procédé et appareil de communication WO2020143751A1 (fr)

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