WO2021155789A1 - Procédé d'indication de précompensation de décalage de fréquence, dispositif de terminal et dispositif de réseau - Google Patents

Procédé d'indication de précompensation de décalage de fréquence, dispositif de terminal et dispositif de réseau Download PDF

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Publication number
WO2021155789A1
WO2021155789A1 PCT/CN2021/074918 CN2021074918W WO2021155789A1 WO 2021155789 A1 WO2021155789 A1 WO 2021155789A1 CN 2021074918 W CN2021074918 W CN 2021074918W WO 2021155789 A1 WO2021155789 A1 WO 2021155789A1
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WIPO (PCT)
Prior art keywords
frequency offset
terminal device
compensation
signaling
uplink
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PCT/CN2021/074918
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English (en)
Chinese (zh)
Inventor
刘昊
孙彦良
孙鹏
宋扬
塔玛拉卡拉盖施
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维沃移动通信有限公司
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Publication of WO2021155789A1 publication Critical patent/WO2021155789A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
    • H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
    • H04L27/38—Demodulator circuits; Receiver circuits
    • H04L27/3845—Demodulator circuits; Receiver circuits using non - coherent demodulation, i.e. not using a phase synchronous carrier
    • H04L27/3854—Demodulator circuits; Receiver circuits using non - coherent demodulation, i.e. not using a phase synchronous carrier using a non - coherent carrier, including systems with baseband correction for phase or frequency offset
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
    • H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
    • H04L27/38—Demodulator circuits; Receiver circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H04L2027/0024—Carrier regulation at the receiver end
    • H04L2027/0026—Correction of carrier offset

Definitions

  • the present invention relates to the field of communications, in particular to a frequency offset pre-compensation indication method, terminal equipment and network equipment.
  • NR 5G New Radio
  • OFDM Orthogonal Frequency Division Multiplexing
  • one of the optimization schemes based on the high-speed rail network is to optimize the receiver algorithm on the terminal side. That is, the terminal assumes that the base station side is not optimized, and the terminal estimates the Doppler frequency offset value based on the downlink signal and uses the Doppler characteristics to do it. Compensate and use more complex channel estimation algorithms to improve receiver performance.
  • the base station side uses frequency offset pre-compensation, that is, the base station estimates the Doppler frequency offset of the wireless channel based on the uplink signal sent by the terminal, and calculates the size of the downlink frequency offset based on a certain assumption and performs pre-compensation.
  • the pre-compensation value and the downlink Doppler frequency offset cancel each other out, and the downlink signal received by the terminal will no longer be affected by Doppler.
  • base station equipment and terminal equipment are optimized independently, and there is no reasonable match between the two, resulting in limited improvement in actual network performance.
  • the purpose of the embodiments of the present invention is to provide a frequency offset pre-compensation indication method, terminal equipment, and network equipment, so that the frequency offset pre-compensation can improve network performance.
  • a frequency offset pre-compensation indication method is provided, which is applied to a terminal device.
  • the method includes: sending uplink signaling to the network device to instruct the terminal device whether to perform frequency offset pre-compensation when sending an uplink signal.
  • a frequency offset pre-compensation method is provided, which is applied to a terminal device.
  • the method includes: performing or not performing frequency offset pre-compensation when sending an uplink signal according to an indication of a preset signaling sent by a network device.
  • a frequency offset pre-compensation method which is applied to a network device, and the method includes: performing frequency offset pre-compensation on the frequency of a downlink signal sent to the terminal device based on an indication of an uplink signaling sent by the terminal device, Wherein, the uplink signaling indicates whether the terminal equipment performs frequency offset pre-compensation when sending uplink signals.
  • a frequency offset pre-compensation method which is applied to a network device, and the method includes: sending a notification signaling to a terminal device, wherein the notification signaling indicates whether the terminal device sends an uplink signal Perform frequency offset pre-compensation; based on whether the terminal device performs frequency offset pre-compensation when sending uplink signals, perform frequency offset pre-compensation on the frequency of the downlink signal sent to the terminal device.
  • a terminal device in a fifth aspect, includes: a first sending module, configured to send uplink signaling to a network device to instruct the terminal device whether to perform frequency offset precompensation when sending an uplink signal.
  • a terminal device in a sixth aspect, includes: a second sending module configured to perform or not perform frequency offset precompensation when sending an uplink signal according to an indication of a preset signaling sent by a network device.
  • a network device including: a first compensation module configured to perform frequency offset pre-compensation on the frequency of a downlink signal sent to the terminal device based on an indication of an uplink signaling sent by the terminal device, wherein the The uplink signaling indicates whether the terminal equipment performs frequency offset pre-compensation when sending uplink signals.
  • a network device including: a third sending module, configured to send notification signaling to a terminal device, wherein the notification signaling indicates whether the terminal device performs frequency offset pre-processing when sending uplink signals. Compensation; The second compensation module is used to perform frequency offset pre-compensation on the frequency of the downlink signal sent to the terminal device based on whether the terminal device performs frequency offset pre-compensation when sending the uplink signal.
  • a terminal device in a ninth aspect, includes a processor, a memory, and a computer program stored on the memory and running on the processor. When the computer program is executed by the processor, The steps of the method as described in the first aspect or the second aspect are implemented.
  • a network device including: a memory, a processor, and a computer program that is stored on the memory and can run on the processor.
  • the computer program is executed by the processor, the following The steps of the method described in the third aspect or the fourth aspect.
  • a computer-readable storage medium is provided, and a computer program is stored on the computer-readable storage medium. The steps of the method described in the fourth aspect.
  • the terminal device sends uplink signaling to the network device to instruct the terminal device whether to perform frequency offset precompensation when sending the uplink signal, or determine whether to perform frequency offset precompensation when sending the uplink signal according to the notification signaling sent by the network device.
  • Frequency offset pre-compensation so that the network equipment can know whether the terminal device performs frequency offset pre-compensation when sending the uplink signal, and then enables the network device to perform frequency offset pre-compensation according to whether the terminal device sends the uplink signal.
  • Frequency offset pre-compensation is performed on the downlink signal to achieve frequency offset pre-compensation to improve network performance.
  • FIG. 1 is a schematic flowchart of a frequency offset pre-compensation indication method according to an embodiment of the present invention
  • FIG. 2 is a schematic flowchart of a frequency offset pre-compensation method provided by an embodiment of the present invention
  • FIG. 3 is another schematic flowchart of a frequency offset pre-compensation method provided by an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of another flow chart of a frequency offset pre-compensation method provided by an embodiment of the present invention.
  • Figure 5 is a schematic diagram of a scenario applied by an embodiment of the present invention.
  • Fig. 6 is a schematic diagram of another scenario applied by an embodiment of the present invention.
  • FIG. 7 is another schematic flowchart of a frequency offset pre-compensation method provided by an embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of a terminal device according to an embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of another terminal device according to an embodiment of the present invention.
  • FIG. 10 is a schematic structural diagram of a network device provided by an embodiment of the present invention.
  • FIG. 11 is a schematic structural diagram of another network device provided by an embodiment of the present invention.
  • FIG. 12 is a schematic structural diagram of a terminal device according to an embodiment of the present invention.
  • Fig. 13 is a schematic structural diagram of a network device provided by an embodiment of the present invention.
  • GSM Global System of Mobile Communication
  • CDMA Code Division Multiple Access
  • GSM Wideband Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • LTE-A Long Term Evolution Advanced
  • NR NR
  • UE User Equipment
  • RAN Radio Access Network
  • user equipment can be mobile terminals, such as mobile phones (or "cellular" phones) and computers with mobile terminals.
  • mobile phones or "cellular" phones
  • computers with mobile terminals.
  • they can be portable, pocket-sized, handheld, computer-built or vehicle-mounted mobile devices. Exchange language and/or data with the wireless access network.
  • the base station can be a base transceiver station (Base Transceiver Station, BTS) in GSM or CDMA, a base station (NodeB) in WCDMA, or an evolved base station (eNB or e-NodeB, evolutional Node) in LTE.
  • BTS Base Transceiver Station
  • NodeB base station
  • eNB evolved base station
  • gNB 5G base station
  • the present invention is not limited, but for the convenience of description, the following embodiments take gNB as an example for description.
  • FIG. 1 is a schematic flowchart of a frequency offset pre-compensation indication method provided in an embodiment of the present invention, and the method 100 may be executed by a terminal device.
  • the method can be executed by software or hardware installed on the terminal device.
  • the method may include the following steps.
  • S110 Send uplink signaling to the network device to instruct the terminal device whether to perform frequency offset pre-compensation when sending the uplink signal.
  • the terminal equipment can optimize the receiver algorithm according to its own settings, estimate the frequency offset value of the downlink signal, and perform frequency offset pre-compensation for the uplink signal.
  • the UE sends uplink signaling to the network side to indicate whether the UE has performed frequency offset precompensation when sending uplink signals.
  • the terminal equipment sends uplink signaling to the network equipment to instruct the terminal equipment whether to perform frequency offset precompensation when sending uplink signals, so that the network equipment can learn whether the terminal equipment performs frequency offset precompensation when sending uplink signals. Compensation in turn enables the network equipment to perform frequency offset pre-compensation on the downlink signal sent to the terminal device according to whether the terminal device sends the uplink signal or not to perform frequency offset pre-compensation, so that the frequency offset pre-compensation can improve the network performance.
  • the UE may carry an uplink media access control layer (Media Access Control, MAC) control element (Control Element, CE) that indicates whether to perform frequency offset pre-compensation when the terminal device sends an uplink signal.
  • MAC Media Access Control
  • CE Control Element
  • the UE may carry 1-bit information in the uplink MAC CE to inform the UE whether frequency offset compensation has been performed.
  • the frequency offset estimated by the network equipment is only the Doppler frequency offset; when the UE is instructed to The frequency offset pre-compensation is done when the uplink signal is sent, and the frequency offset estimated by the network equipment may be twice the Doppler frequency offset.
  • the terminal device can estimate the frequency offset value for frequency offset pre-compensation based on the detected preset downlink signal , Performing frequency offset pre-compensation on the transmitted uplink signal according to the frequency offset value.
  • the terminal device uses the preset center frequency to send the uplink signal.
  • the preset center frequency refers to the center frequency currently used by the network system, which is specifically related to the currently applied network system, and is not limited in this embodiment.
  • the preset downlink signal may be a tracking pilot on a pre-configured target tracking pilot resource.
  • the network side can pre-configure the tracking pilot resource.
  • the UE can estimate the frequency offset value by detecting the tracking pilot transmitted on the tracking pilot resource, and compensate the frequency of the transmitted uplink signal according to the frequency offset value. . For example, assuming that the center carrier frequency of the UE is F0, the UE detects the tracking pilot, and the estimated frequency offset value is ⁇ f, then the UE sends the uplink signal at F0+ ⁇ f.
  • the network device may be pre-configured with at least two tracking pilot resources. Then, before the terminal device estimates the frequency offset value for frequency offset pre-compensation according to the detected preset downlink signal, The UE may determine the target tracking pilot resource for estimating the frequency offset value according to the signaling notification sent by the network device or an agreement with the network device in advance.
  • determining the target tracking pilot resource for estimating the frequency offset value may include one of the following: according to the indication of the radio resource control (RRC) configuration signaling sent by the network device, determining the Target tracking pilot resource; according to an agreement with the network device in advance, based on the transmission configuration indication (TCI) and/or quasi co-location (QCL) of each of the at least two tracking pilot resources, determining The target tracks the pilot frequency resource.
  • RRC radio resource control
  • the network device may carry the identification information of the target tracking pilot resource in the RRC configuration signaling, or may also indicate the target tracking pilot resource through the TCI and/or QCL in the RRC configuration signaling.
  • multiple tracking pilot resources configured may be indicated in one or more signaling fields in RRC configuration signaling, and then carried as a target in another signaling field The identification information of the tracking pilot resource of the tracking pilot resource.
  • the multiple tracking pilot resources configured are indicated in one or more signaling fields in the RRC configuration signaling, and then the target tracking pilot resource is indicated in the TCI and/or QCL domains of the RRC configuration signaling.
  • two tracking pilot resources RS1 and RS2 are configured in the RRC configuration signaling, and the network instructs the UE to use RS1 as the target tracking pilot resource, and it can carry a 2bit bitmap in TCI and/or QCL: 01, indicating configuration
  • the second tracking pilot resource, that is, RS2 is the target tracking pilot resource.
  • determining the target tracking pilot resource based on the TCI and/or QCL of each tracking pilot resource in the at least two tracking pilot resources may include: The target tracking pilot resource is selected from the pilot resources, wherein the TCI and/or QCL of the target tracking pilot resource is the same as one of the following:
  • the TCI and/or QCI configured in the Downlink Control Information (DCI) to receive the Physical Downlink Shared Channel (PDSCH);
  • PDCH Physical Downlink Control Channel
  • the reference signal may be a tracking pilot.
  • the TCI and/or QCI configured by the RRC of the uplink SRS resource can be indicated by the SRI configured in the DCI domain for sending PUSCH.
  • FIG. 2 is a schematic flowchart of a frequency offset pre-compensation method provided by an embodiment of the present invention.
  • the method 200 may be executed by a terminal device.
  • the method can be executed by software or hardware installed on the terminal device.
  • the method may include the following steps.
  • S210 Receive notification signaling sent by a network device.
  • the notification signaling indicates whether the terminal equipment performs frequency offset pre-compensation when sending uplink signals.
  • the network device (for example, the base station) can directly instruct the UE whether to perform frequency offset pre-compensation when sending uplink signals through notification signaling.
  • the notification signaling includes: broadcast signaling sent by the network device.
  • the base station may configure a broadcast signaling to indicate that the base station has enabled the frequency offset pre-compensation function. Therefore, after receiving the broadcast signaling, the terminal device determines not to perform frequency offset pre-compensation on the transmitted uplink signal.
  • the notification signaling includes: exclusive signaling sent by the network device to the terminal device.
  • the network device informs the terminal device whether to perform frequency offset pre-compensation when sending uplink signals through RRC configuration signaling.
  • the method may further include: reporting capability information, where the capability information includes indication information indicating whether the terminal device supports frequency offset precompensation.
  • the network device may determine whether to allow the terminal device to perform frequency offset pre-compensation when sending the uplink signal according to the capability information reported by the terminal device. For example, for a base station located near the high-speed rail, which has the frequency offset pre-compensation capability enabled, when the base station receives the capability information reported by the terminal equipment, if it instructs the terminal equipment to support frequency offset pre-compensation, the base station can notify the terminal The device sends the above-mentioned exclusive signaling to notify the terminal device not to perform frequency offset pre-compensation when sending uplink signals.
  • S212 The terminal equipment performs or does not perform frequency offset pre-compensation when sending uplink signals according to the indication of the notification signaling.
  • the terminal equipment performs or does not perform frequency offset pre-compensation when sending uplink signals according to the indication of the notification signaling. For example, if the notification signaling instructs the terminal device to perform frequency offset pre-compensation when sending an uplink signal, the terminal device estimates the frequency offset value for frequency offset pre-compensation according to the detected preset downlink signal, and according to the frequency offset value Perform frequency offset pre-compensation on the transmitted uplink signal (assuming that the terminal has the capability of frequency offset pre-compensation).
  • the terminal device does not perform frequency offset pre-compensation when sending an uplink signal, for example, sends the uplink signal at a preset center frequency.
  • the foregoing preset downlink signal includes: a tracking pilot on a pre-configured target tracking pilot resource.
  • the network device is pre-configured with at least two tracking pilot resources, before the terminal device estimates the frequency offset value for frequency offset pre-compensation according to the detected preset downlink signal Determine the target tracking pilot resource used to estimate the frequency offset value according to the signaling notification sent by the network device or an agreement with the network device in advance.
  • determining the target tracking pilot resource for estimating the frequency offset value may include one of the following: according to the indication of the radio resource control (RRC) configuration signaling sent by the network device, determining the Target tracking pilot resource; according to an agreement with the network device in advance, based on the transmission configuration indication (TCI) and/or quasi co-location (QCL) of each of the at least two tracking pilot resources, determining The target tracks the pilot frequency resource.
  • RRC radio resource control
  • the network device may carry the identification information of the target tracking pilot resource in the RRC configuration signaling, or may also indicate the target tracking pilot resource through the TCI and/or QCL in the RRC configuration signaling.
  • multiple tracking pilot resources configured may be indicated in one or more signaling fields in RRC configuration signaling, and then carried as a target in another signaling field The identification information of the tracking pilot resource of the tracking pilot resource.
  • the multiple tracking pilot resources configured are indicated in one or more signaling fields in the RRC configuration signaling, and then the target tracking pilot resource is indicated in the TCI and/or QCL domains of the RRC configuration signaling.
  • two tracking pilot resources RS1 and RS2 are configured in the RRC configuration signaling, and the network instructs the UE to use RS1 as the target tracking pilot resource, and it can carry a 2bit bitmap in TCI and/or QCL: 01, indicating configuration
  • the second tracking pilot resource, that is, RS2 is the target tracking pilot resource.
  • determining the target tracking pilot resource based on the TCI and/or QCL of each tracking pilot resource in the at least two tracking pilot resources may include: The target tracking pilot resource is selected from the pilot resources, wherein the TCI and/or QCL of the target tracking pilot resource is the same as one of the following:
  • TCI and/or QCI configured to receive PDSCH in Downlink Control Information DCI
  • the TCI and/or QCI configured in the MAC CE to receive the PDCCH;
  • the reference signal may be a tracking pilot.
  • the TCI and/or QCI configured by the RRC of the uplink SRS resource can be indicated by the SRI configured in the DCI domain for sending PUSCH.
  • the terminal device performs or does not perform frequency offset precompensation when sending uplink signals according to the instructions of the notification signaling sent by the network device, so that the network device can learn whether the terminal device performs frequency offset when sending uplink signals.
  • Offset pre-compensation in turn, enables network equipment to perform frequency offset pre-compensation on the downlink signal sent to the terminal device according to whether the terminal device performs frequency offset pre-compensation when sending uplink signals, so as to achieve frequency offset pre-compensation to improve network performance.
  • FIG. 3 is another schematic flowchart of a frequency offset pre-compensation method provided by an embodiment of the present invention.
  • the method 300 may be executed by a network device.
  • the method can be executed by software or hardware installed on a network device.
  • the method may include the following steps.
  • S310 Perform frequency offset pre-compensation on the frequency of the downlink signal sent to the terminal device based on the indication of the preset signaling.
  • the preset signaling indicates whether to perform frequency offset pre-compensation when the terminal device sends an uplink signal.
  • the network device performs frequency offset precompensation on the downlink signal sent to the terminal device according to whether the terminal device performs frequency offset precompensation when sending the uplink signal, so that the frequency offset precompensation improves the network performance.
  • the preset signaling includes: uplink signaling of the terminal device.
  • the uplink signaling may be the uplink signaling described in the method 100.
  • the terminal device informs the network device whether or not the terminal device performs frequency offset pre-compensation when sending an uplink signal.
  • the preset signaling includes: notification signaling sent by the network device.
  • the notification signaling may be the notification signaling described in the method 200, and may refer to the description in the foregoing method 200 for details. That is, in this possible implementation manner, the network device determines whether the terminal device performs frequency offset pre-compensation when sending an uplink signal, and notifies the terminal device.
  • performing frequency offset pre-compensation on the frequency of the downlink signal sent to the terminal equipment based on the indication of the preset signaling may include: judging the terminal equipment according to the indication of the preset signaling Whether the transmitted uplink signal has been pre-compensated for frequency offset; for different judgment results, different compensation values are used to compensate the frequency of the downlink signal transmitted to the terminal device. For example, if the terminal equipment performs frequency offset compensation when sending uplink signals, the compensation value estimated by the base station may be twice the Doppler frequency offset; if the terminal does not perform frequency offset compensation when sending uplink signals, the compensation estimated by the base station The value is the Doppler frequency deviation.
  • the network device can estimate the frequency offset based on the uplink received signal of the terminal device to obtain the Doppler frequency offset, and then determine the specific compensation according to whether the terminal device performs frequency offset pre-compensation when sending the uplink signal value.
  • the adopted manner when the network device performs frequency offset pre-compensation on the downlink signal, includes, but is not limited to, implementation through adjustment of the crystal oscillator or implementation through baseband algorithm processing.
  • FIG. 4 is a schematic flowchart of a frequency offset pre-compensation method provided by an embodiment of the present invention.
  • the method 400 may be executed by a terminal device and a network device.
  • the method can be executed by software or hardware installed on the terminal device and the network device.
  • the method may include the following steps.
  • the terminal device sends uplink signaling to the network device to instruct the terminal device whether to perform frequency offset pre-compensation when sending the uplink signal.
  • This step is the same as S110.
  • the network device performs frequency offset pre-compensation on the frequency of the downlink signal sent to the terminal device based on the indication of the received uplink signaling.
  • the network device may be a Transmit-Receive Point (TRP) on the network side, for example, it may be a base station or different antenna groups of the base station.
  • TRP Transmit-Receive Point
  • the center carrier frequency of the two transceiver nodes TRP1 and TRP2 is F0, and the UE center carrier frequency is also F0.
  • the Doppler frequency deviation caused by TRP1 is ⁇ f0; and the Doppler frequency deviation caused by TRP2 is ⁇ f1.
  • the uplink signals received by the two TRPs are F0+ ⁇ f0 and F0+ ⁇ f1, respectively.
  • the two TRPs use the uplink pilot signals of the terminal equipment, such as DMRS or SRS, to estimate Doppler frequency offsets ⁇ f0 and ⁇ f1, respectively. Since the uplink signaling sent by the terminal equipment instructs the terminal equipment not to perform frequency offset precompensation when sending the uplink signaling, when the downlink signal is sent again, TRP1 frequency offset precompensation- ⁇ f0; TRP1 frequency offset precompensation- ⁇ f1.
  • the downlink signal can include PDSCH and tracking pilot, that is, to eliminate Doppler influence on both PDSCH and tracking pilot.
  • the two TRPs can be configured with the same tracking pilot resource, which is equivalent to only being configured with A tracking pilot resource.
  • the terminal equipment When the terminal equipment sends uplink signals, it performs frequency offset pre-compensation, and configures two tracking pilot resources to send tracking reference signals (Tracking Reference Signal, TRS).
  • TRS Track Reference Signal
  • the terminal equipment uses the downlink frequency offset compensation estimated by TRS1 based on the base station signaling instructions.
  • the uplink signals received by the two TRPs are F0+ ⁇ f0+ ⁇ f0 and F0+ ⁇ f0+ ⁇ f1, respectively.
  • two TRPs (actually two antennas of the same base station) use uplink pilot signals, such as DMRS or SRS, to estimate Doppler frequency offsets as 2 ⁇ f0 and ⁇ f0+ ⁇ f1 respectively.
  • the terminal equipment informs it through uplink signaling that it has done frequency offset pre-compensation when sending uplink signals. Since there is an ideal loop between the two TRPs (the baseband can obtain the information of the two sets of antennas), the equations can be solved jointly to obtain ⁇ f0 and ⁇ f1, respectively .
  • TRP1 frequency offset pre-compensation - ⁇ f0 When sending the downlink signal again, TRP1 frequency offset pre-compensation - ⁇ f1.
  • the downlink signal may be PDSCH, which eliminates Doppler influence.
  • the tracking pilot TRS does not perform frequency offset pre-compensation.
  • FIG. 7 is a schematic flowchart of a frequency offset pre-compensation method provided by an embodiment of the present invention.
  • the method 700 may be executed by a terminal device and a network device.
  • the method can be executed by software or hardware installed on the terminal device and the network device.
  • the method may include the following steps.
  • S720 The network device sends notification signaling to the terminal device, where the notification signaling indicates whether the terminal device performs frequency offset precompensation when sending an uplink signal.
  • S710 The terminal device receives the notification information.
  • This step is the same as S210.
  • S712 The terminal device performs or does not perform frequency offset pre-compensation when sending uplink signals according to the indication of the notification signaling.
  • This step is the same as S212.
  • S722 Perform frequency offset pre-compensation on the frequency of the downlink signal sent to the terminal device based on the indication of the notification signaling.
  • the network device may be a Transmit-Receive Point (TRP) on the network side.
  • TRP Transmit-Receive Point
  • the network device may be a base station or different antenna groups of the base station.
  • the uplink signals received by the two TRPs are F0+ ⁇ f0 and F0+ ⁇ f1, respectively.
  • the two TRPs use the uplink pilot signals of the terminal equipment, such as DMRS or SRS, to estimate Doppler frequency offsets ⁇ f0 and ⁇ f1, respectively. Since the uplink signaling sent by the terminal equipment instructs the terminal equipment not to perform frequency offset precompensation when sending the uplink signaling, when the downlink signal is sent again, TRP1 frequency offset precompensation- ⁇ f0; TRP1 frequency offset precompensation- ⁇ f1.
  • the downlink signal can include PDSCH and tracking pilot, that is, to eliminate Doppler influence on both PDSCH and tracking pilot.
  • the two TRPs can be configured with the same tracking pilot resource, which is equivalent to only being configured with A tracking pilot resource.
  • TRP1 frequency offset pre-compensation - ⁇ f0 When sending the downlink signal again, TRP1 frequency offset pre-compensation - ⁇ f1.
  • the downlink signal may be PDSCH, which eliminates Doppler influence.
  • the tracking pilot TRS does not perform frequency offset pre-compensation.
  • the embodiment of the present invention also provides a method for determining a transmission scheme.
  • the UE when the TCI field in the DCI indicates two TCI states, and the network side sends a preset signaling to the UE, the preset signaling configuration or indication (RRC, MAC CE, or DCI) is a scheduled transmission Scheme (such as SFN, SDM, etc.), the UE receives the PDSCH according to the predetermined transmission scheme. Or when there is no such signaling indication (for example, no high-level signaling RepSchemeEnabler is configured), the UE receives the PDSCH according to the pre-agreed reception scheme.
  • the preset signaling configuration or indication RRC, MAC CE, or DCI
  • the UE receives the PDSCH according to the predetermined transmission scheme.
  • the UE receives the PDSCH according to the pre-agreed reception scheme.
  • SFN has multiple transmission schemes, for example, multiple DMRS ports indicated by DCI correspond to multiple CDM groups, and DMRS ports in each CDM group correspond to one TCI state; or each DMRS port corresponds to multiple TCI states, etc., you can also use The above-mentioned preset signaling is used to distinguish each TCI state.
  • FIG. 8 is a schematic structural diagram of a terminal device provided by an embodiment of the present invention.
  • the terminal device 800 includes: a first sending module 810, configured to send uplink signaling to a network device to instruct the terminal device Whether to perform frequency offset pre-compensation when sending uplink signals.
  • the first sending module 810 sending uplink signaling to the network device includes: carrying indication information in the uplink MAC CE that indicates whether the terminal device performs frequency offset precompensation when sending the uplink signal.
  • sending the uplink signal by the first sending module 810 includes: if frequency offset pre-compensation is performed when sending the uplink signal, the terminal device estimates that the frequency offset is pre-compensated according to the detected preset downlink signal. For the compensated frequency offset value, perform frequency offset pre-compensation on the transmitted uplink signal according to the frequency offset value; if the frequency offset pre-compensation is not performed when transmitting the uplink signal, the terminal device uses the preset center frequency to transmit the uplink signal .
  • the preset downlink signal includes: a tracking pilot on a pre-configured target tracking pilot resource.
  • the terminal device further includes: a first determining module, configured to, before obtaining the frequency offset value for frequency offset pre-compensation, if the network device is pre-configured with at least two tracking pilots Resource, the target tracking pilot resource used for estimating the frequency offset value is determined according to the signaling notification sent by the network device or an agreement with the network device in advance.
  • a first determining module configured to, before obtaining the frequency offset value for frequency offset pre-compensation, if the network device is pre-configured with at least two tracking pilots Resource, the target tracking pilot resource used for estimating the frequency offset value is determined according to the signaling notification sent by the network device or an agreement with the network device in advance.
  • the first determining module determines the target tracking pilot resource for estimating the frequency offset value, including one of the following: determining the target tracking pilot resource according to the indication of the radio resource control RRC configuration signaling sent by the network device The target tracking pilot resource; according to an agreement with the network device in advance, the target tracking pilot resource is determined based on the TCI and/or QCL of each of the at least two tracking pilot resources.
  • the RRC configuration signaling carries identification information of the target tracking pilot resource, or the TCI and/or QCL in the RRC configuration signaling indicate the target tracking pilot resource.
  • determining the target tracking pilot resource based on the transmission configuration indication TCI and/or quasi-co-located QCL of each tracking pilot resource in the at least two tracking pilot resources includes: The target tracking pilot resource is selected from the at least two tracking pilot resources, wherein the TCI and/or QCL of the target tracking pilot resource is the same as one of the following: the TCI and the TCI configured in the DCI for receiving PDSCH /Or QCI; MAC CE configured to receive the TCI and/or QCI of the physical downlink control channel PDCCH; TCI and/or QCI of the reference signal RS indicated by the spatial relationship information signaling of the uplink sounding reference signal SRS resource; uplink SRS The TCI and/or QCI of the RRC configuration of the resource.
  • the terminal device provided by the embodiment of the present invention can implement each process implemented by the terminal device in the method embodiments of FIG. 1, FIG. 3, and FIG.
  • FIG. 9 is a schematic structural diagram of another terminal device provided by an embodiment of the present invention.
  • the terminal device 900 includes: a second sending module 910, which is configured to: Do or not do frequency offset pre-compensation when sending uplink signals.
  • the notification signaling includes: broadcast signaling sent by the network device, or dedicated signaling sent by the network device to the terminal device.
  • a reporting module for reporting capability information, where the capability information includes indication information indicating whether the terminal device supports frequency offset pre-compensation.
  • sending the uplink signal by the second sending module 910 includes: if performing frequency offset pre-compensation when sending the uplink signal, the terminal device estimates that the frequency offset pre-compensation is performed according to the detected preset downlink signal. For the compensated frequency offset value, perform frequency offset pre-compensation on the transmitted uplink signal according to the frequency offset value; if the frequency offset pre-compensation is not performed when transmitting the uplink signal, the terminal device uses the preset center frequency to transmit the uplink signal .
  • the preset downlink signal includes: a tracking pilot on a pre-configured target tracking pilot resource.
  • a second determining module configured to, before the frequency offset value for frequency offset pre-compensation is obtained by estimating, if the network device is pre-configured with at least two tracking pilot resources, The signaling notification sent by the network device, or an agreement with the network device in advance, determines the target tracking pilot resource used to estimate the frequency offset value.
  • the second determining module determining the target tracking pilot resource used to estimate the frequency offset value includes one of the following: determining the target tracking pilot resource according to the indication of the radio resource control RRC configuration signaling sent by the network device The target tracking pilot resource; according to an agreement with the network device in advance, the target is determined based on the transmission configuration indication TCI and/or quasi-colocation QCL of each of the at least two tracking pilot resources Track pilot resources.
  • the RRC configuration signaling carries identification information of the target tracking pilot resource, or the TCI and/or QCL in the RRC configuration signaling indicate the target tracking pilot resource.
  • determining the target tracking pilot resource based on the transmission configuration indication TCI and/or quasi-co-located QCL of each tracking pilot resource in the at least two tracking pilot resources includes: The target tracking pilot resource is selected from the at least two tracking pilot resources, wherein the TCI and/or QCL of the target tracking pilot resource is the same as one of the following: the TCI and the TCI configured in the DCI for receiving PDSCH /Or QCI; TCI and/or QCI configured in MAC CE to receive PDCCH; TCI and/or QCI of reference signal RS indicated by spatial relationship information signaling of uplink SRS resources; TCI and/or QCI configured by RRC of uplink SRS resources / Or QCI.
  • the terminal device provided by the embodiment of the present invention can implement each process implemented by the terminal device in the method embodiments of FIG. 2, FIG. 3, and FIG.
  • FIG. 10 is a schematic structural diagram of a network device provided by an embodiment of the present invention.
  • the network device 1000 includes: a first compensation module 1010, which is configured to send information based on an uplink signaling instruction sent by a terminal device. Perform frequency offset pre-compensation on the frequency of the downlink signal of the terminal device, wherein the uplink signaling indicates whether the terminal device performs frequency offset pre-compensation when sending the uplink signal.
  • a first compensation module 1010 which is configured to send information based on an uplink signaling instruction sent by a terminal device. Perform frequency offset pre-compensation on the frequency of the downlink signal of the terminal device, wherein the uplink signaling indicates whether the terminal device performs frequency offset pre-compensation when sending the uplink signal.
  • the first compensation module 1010 performs frequency offset pre-compensation on the frequency of the downlink signal sent to the terminal device, including: if the uplink signal sent by the terminal device has been pre-compensated for frequency offset, using the second A compensation value compensates for the frequency of the downlink signal sent to the terminal device; if the uplink signal sent by the terminal device is not pre-compensated for frequency offset, the second compensation value is used for the downlink signal sent to the terminal device The first compensation value is different from the second compensation value.
  • FIG. 11 is a schematic structural diagram of another network device provided according to an embodiment of the present invention.
  • the network device 1100 includes: a third sending module 1110, configured to send notification signaling to a terminal device.
  • the notification signaling indicates whether the terminal device performs frequency offset pre-compensation when sending uplink signals;
  • the second compensation module 1120 is configured to perform frequency offset pre-compensation based on whether the terminal device sends uplink signals to the terminal.
  • the frequency of the device's downlink signal is pre-compensated for frequency offset.
  • the notification signaling includes broadcast signaling or dedicated signaling sent to the terminal device.
  • the second compensation module 1120 performs frequency offset pre-compensation on the frequency of the downlink signal sent to the terminal device, including: if the uplink signal sent by the terminal device has been pre-compensated for frequency offset, the second compensation module 1120 A compensation value compensates for the frequency of the downlink signal sent to the terminal device; if the uplink signal sent by the terminal device is not pre-compensated for frequency offset, the second compensation value is used for the downlink signal sent to the terminal device The first compensation value is different from the second compensation value.
  • the network device provided by the embodiment of the present invention can implement each process implemented by the network device in the foregoing method embodiments, and achieve the same effect. In order to avoid repetition, details are not described herein again.
  • Fig. 12 is a block diagram of a terminal device according to another embodiment of the present invention.
  • the terminal device 1200 shown in FIG. 12 includes: at least one processor 1201, a memory 1202, at least one network interface 1204, and a user interface 1203.
  • the various components in the terminal device 1200 are coupled together through the bus system 1205.
  • the bus system 1205 is used to implement connection and communication between these components.
  • the bus system 1205 also includes a power bus, a control bus, and a status signal bus.
  • various buses are marked as the bus system 1205 in FIG. 12.
  • the user interface 1203 may include a display, a keyboard, or a pointing device (for example, a mouse, a trackball (trackball), a touch panel, or a touch screen, etc.).
  • a pointing device for example, a mouse, a trackball (trackball), a touch panel, or a touch screen, etc.
  • the memory 1202 in the embodiment of the present invention may be a volatile memory or a non-volatile memory, or may include both volatile and 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), and electrically available Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory.
  • the volatile memory may be a random access memory (Random Access Memory, RAM), which is used as an external cache.
  • RAM static random access memory
  • DRAM dynamic random access memory
  • DRAM synchronous dynamic random access memory
  • Synchronous DRAM Double Data Rate Synchronous Dynamic Random Access Memory
  • Double Data Rate SDRAM Double Data Rate SDRAM
  • DDRSDRAM Double Data Rate Synchronous Dynamic Random Access Memory
  • Enhanced SDRAM, ESDRAM Synchronous Link Dynamic Random Access Memory
  • Synch Link DRAM Synchronous Link Dynamic Random Access Memory
  • DRRAM Direct Rambus RAM
  • the memory 1202 of the system and method described in the embodiment of the present invention is intended to include, but is not limited to, these and any other suitable types of memory.
  • the memory 1202 stores the following elements, executable modules or data structures, or their subsets, or their extended sets: operating system 12021 and application programs 12022.
  • the operating system 12021 includes various system programs, such as a framework layer, a core library layer, and a driver layer, which are used to implement various basic services and process hardware-based tasks.
  • the application program 12022 includes various application programs, such as a media player (Media Player), a browser (Browser), etc., which are used to implement various application services.
  • the program for implementing the method of the embodiment of the present invention may be included in the application program 12022.
  • the terminal device 1200 further includes: a computer program stored in the memory 1202 and capable of running on the processor 1201.
  • the computer program is executed by the processor 1201, the following steps are implemented: sending uplink signaling to the network device, Instruct the terminal equipment whether to perform frequency offset pre-compensation when sending uplink signals; or, according to the instructions of the notification signaling sent by the network equipment, do or not perform frequency offset pre-compensation when sending uplink signals.
  • the method disclosed in the foregoing embodiment of the present invention may be applied to the processor 1201 or implemented by the processor 1201.
  • the processor 1201 may be an integrated circuit chip with signal processing capabilities. In the implementation process, the steps of the foregoing method may be completed by an integrated logic circuit of hardware in the processor 1201 or instructions in the form of software.
  • the aforementioned processor 1201 may be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (ASIC), a ready-made programmable gate array (Field Programmable Gate Array, FPGA) or other Programmable logic devices, discrete gates or transistor logic devices, discrete hardware components.
  • DSP Digital Signal Processor
  • ASIC application specific integrated circuit
  • FPGA Field Programmable Gate Array
  • Programmable logic devices discrete gates or transistor logic devices, discrete hardware components.
  • the general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.
  • the steps of the method disclosed in combination with the embodiments of the present invention may be directly embodied as being executed and completed by a hardware decoding processor, or executed and completed by a combination of hardware and software modules in the decoding processor.
  • the software module may be located in a computer-readable storage medium that is mature in the field, such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers.
  • the computer-readable storage medium is located in the memory 1202, and the processor 1201 reads information in the memory 1202, and completes the steps of the foregoing method in combination with its hardware.
  • a computer program is stored on the computer-readable storage medium, and when the computer program is executed by the processor 1201, each step in the above method 100 or method 200 is implemented.
  • the embodiments described in the embodiments of the present invention may be implemented by hardware, software, firmware, middleware, microcode, or a combination thereof.
  • the processing unit can be implemented in one or more application specific integrated circuits (ASIC), digital signal processor (Digital Signal Processing, DSP), digital signal processing equipment (DSP Device, DSPD), programmable Logic device (Programmable Logic Device, PLD), Field-Programmable Gate Array (Field-Programmable Gate Array, FPGA), general-purpose processors, controllers, microcontrollers, microprocessors, and others for performing the functions described in the present invention Electronic unit or its combination.
  • ASIC application specific integrated circuits
  • DSP Digital Signal Processing
  • DSP Device digital signal processing equipment
  • PLD programmable Logic Device
  • PLD Field-Programmable Gate Array
  • FPGA Field-Programmable Gate Array
  • the technology described in the embodiments of the present invention can be implemented by modules (for example, procedures, functions, etc.) that execute the functions described in the embodiments of the present invention.
  • the software codes can be stored in the memory and executed by the processor.
  • the memory can be implemented in the processor or external to the processor.
  • the terminal device 1200 can implement each process implemented by the terminal device in the foregoing method 100 or method 200, and in order to avoid repetition, details are not described herein again.
  • FIG. 13 is a structural diagram of a network device applied in an embodiment of the present invention, which can implement various details in the method 300 and achieve the same effect.
  • the network device 1300 includes: a processor 1301, a transceiver 1302, a memory 1303, a user interface 1304, and a bus interface, where:
  • the network device 1300 further includes: a computer program that is stored in the memory 1303 and can run on the processor 1301, and the computer program is executed by the processor 1301 to implement the following steps:
  • Send notification signaling to the terminal device where the notification signaling indicates whether the terminal device performs frequency offset precompensation when sending uplink signals; based on whether the terminal device performs frequency offset precompensation when sending uplink signals, The frequency of the downlink signal sent to the terminal device is pre-compensated for frequency offset.
  • the bus architecture may include any number of interconnected buses and bridges. Specifically, one or more processors represented by the processor 1301 and various circuits of the memory represented by the memory 1303 are linked together.
  • the bus architecture can also link various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are all known in the art, and therefore, no further descriptions are provided herein.
  • the bus interface provides the interface.
  • the transceiver 1302 may be a plurality of elements, that is, including a transmitter and a receiver, and provide a unit for communicating with various other devices on the transmission medium.
  • the user interface 1304 may also be an interface capable of connecting externally and internally with the required equipment.
  • the connected equipment includes but not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.
  • the processor 1301 is responsible for managing the bus architecture and general processing, and the memory 1303 can store data used by the processor 1301 when performing operations.
  • the network device 1300 can implement each process implemented by the network device in the foregoing method 300, method 400, or 700, and achieve the same effect. To avoid repetition, details are not described herein again.
  • the embodiment of the present invention also provides a computer-readable storage medium on which a computer program is stored.
  • a computer program is stored.
  • the computer program is executed by a processor, the above-mentioned method 100, method 200, method 300, method 400, or method 700 are implemented.
  • the computer-readable storage medium such as read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk, or optical disk, etc.
  • the technical solution of the present invention essentially or the part that contributes to the existing technology can be embodied in the form of a software product, and the computer software product is stored in a storage medium (such as ROM/RAM, magnetic disk, The optical disc) includes several instructions to make a terminal (which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) execute the method described in each embodiment of the present invention.
  • a terminal which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.

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

Abstract

La présente invention concerne un procédé d'indication de précompensation de décalage de fréquence, un dispositif de terminal et un dispositif de réseau. Le procédé d'indication de précompensation de décalage de fréquence est appliqué à un dispositif de terminal, et ledit procédé comprend : l'envoi d'une signalisation de liaison montante à un dispositif de réseau pour indiquer si une précompensation de décalage de fréquence est réalisée lorsque le dispositif de terminal envoie un signal de liaison montante.
PCT/CN2021/074918 2020-02-05 2021-02-02 Procédé d'indication de précompensation de décalage de fréquence, dispositif de terminal et dispositif de réseau WO2021155789A1 (fr)

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