WO2020029873A1 - Procédé et appareil de communication, et système de communication - Google Patents

Procédé et appareil de communication, et système de communication Download PDF

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Publication number
WO2020029873A1
WO2020029873A1 PCT/CN2019/098979 CN2019098979W WO2020029873A1 WO 2020029873 A1 WO2020029873 A1 WO 2020029873A1 CN 2019098979 W CN2019098979 W CN 2019098979W WO 2020029873 A1 WO2020029873 A1 WO 2020029873A1
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WIPO (PCT)
Prior art keywords
antenna
reference signal
weight vector
antenna weight
target
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PCT/CN2019/098979
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English (en)
Chinese (zh)
Inventor
杨坤
汲桐
高峰
于光炜
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华为技术有限公司
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Publication of WO2020029873A1 publication Critical patent/WO2020029873A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0092—Indication of how the channel is divided

Definitions

  • Wireless communication technology has penetrated into many traditional industries, and has derived many emerging application scenarios.
  • higher requirements are imposed on current communication systems.
  • time synchronization clock synchronization or time synchronization
  • Some special industrial applications require the time synchronization accuracy between terminal devices to be within ⁇ 1us.
  • a high detection accuracy is required in the process of detecting the air interface loopback delay.
  • whether to perform time synchronization or detect air interface loopback delay it is achieved by transmitting an uplink reference signal and a downlink reference signal between a terminal device and a network device. Specifically, the clock correction is performed according to the arrival time of the uplink reference signal, the transmission time of the uplink reference signal, the arrival time of the downlink reference signal, and the transmission time of the downlink reference signal, or the air interface loopback delay is calculated.
  • the antenna weight vector and the antenna weight vector set may be weighted values or scaled values of signal transmission or reception of each transmitting or receiving antenna of the network device or the terminal device; or may be the target The power adjustment or power allocation of the reference signal and / or the phase adjustment of the reference signal during the uplink reference signal or target downlink reference signal generation process.
  • the receiving and transmitting antenna weight vectors with the same ratio can ensure that a network device or a terminal device obtains the same antenna array gain or spatial energy distribution during the sending and / or receiving of the target downlink reference signal and the target uplink reference signal. Thereby reducing the detection difference between the uplink and downlink reference signals.
  • the proportion of antenna weights corresponding to the same antenna in the fourth antenna weight vector is the same as that in the third antenna weight vector
  • the second antenna weight vector set is the same as that in the first antenna weight vector.
  • the target uplink reference signal and the target downlink The spatial energy distribution of the beams used by the reference signal is the same, and the transmission time occupied by the transmission in the path is similar, which is conducive to improving the accuracy of time synchronization or detecting the loopback delay. It is avoided that in the prior art, because the transmission beams of the uplink reference signal and the downlink reference signal are different, the accuracy of performing time synchronization or detecting a loopback delay is low.
  • the second antenna weight vector set is determined according to the first antenna weight vector, so as to realize the spatial energy distribution of the transmitting antenna of the target uplink reference signal and the spatial energy of the receiving antenna of the target downlink reference signal.
  • the same distribution is helpful to improve the accuracy of time synchronization or detection of loopback delay.
  • the second antenna weight vector set has the same phase as the corresponding antenna in the first antenna weight vector
  • the method further includes: the terminal device sends the network device to the network device. Send second information, where the second information includes amplitude information of the first antenna weight vector.
  • the terminal device sends the second information to the network device, so that the network device determines the weighting parameter of multiple uplink transmission resources of the target uplink reference signal according to the second information, so as to reduce the terminal device generating the target uplink reference.
  • the complexity of the signal is the first information.
  • the second antenna weight vector set has the same phase or the same phase difference between the antennas corresponding to the same antenna in the first antenna weight vector.
  • the power of the second antenna weight vector is determined by the transmit power limit of the terminal device.
  • the target downlink reference carried in the first channel is configured indirectly by configuring the first antenna weight vector used when receiving the first channel and the second antenna weight vector used when sending the second channel.
  • the antenna weight used for the signal and the antenna weight used for sending the target uplink reference signal carried in the second channel are beneficial to improve the accuracy of time synchronization or detection of the loopback delay.
  • the terminal device sends the fourth information to the network device, so that the network device determines the weighting parameters of multiple uplink transmission resources of the target uplink reference signal according to the first antenna weight vector.
  • the transmission weight of the target uplink reference signal is obtained according to a calculation method specified in an existing protocol, so that the generation method of the uplink reference signal is maintained, and the uplink reference signal transmission rule of the terminal device is maintained.
  • the network device determines the first weighting parameter of the target uplink reference signal according to the phase information of the first antenna weight vector, and combines the target uplink reference signal according to the first weighting parameter, so that the terminal device can
  • the target uplink reference signal may be generated based on only the amplitude information of the first antenna weight vector, thereby reducing the complexity of generating the target uplink reference signal by the terminal device.
  • the combining, by the network device, the target uplink reference signal includes: determining, by the network device, a third weighting parameter according to the first antenna weight vector, and using the third weighting parameter. Combine the target uplink reference signals.
  • the network device determines a third weighting parameter of the target uplink reference signal according to the first antenna weight vector, and combines the target uplink reference signal according to the third weighting parameter, so that the terminal device generates a target uplink
  • the target uplink reference signal may be generated based only on the phase information of the first antenna weight vector, thereby reducing the complexity of generating the target uplink reference signal by the terminal device.
  • the method further includes: the network device sends third information to the terminal device, where the third information is used to indicate a resource number of the target uplink reference signal and the target Downlink reference signal resource number.
  • the network device sending the target downlink reference signal to a terminal device by using a third antenna weight vector includes: the network device receiving the terminal by using the third antenna weight vector The device sends a first channel, where the first channel carries a first data signal and the target downlink reference signal; the network device uses the fourth antenna weight vector to receive a target uplink reference signal sent by the terminal device The method includes: the network device uses the fourth antenna weight vector to receive a second channel sent by the terminal device, where the second channel carries a second data signal and the target uplink reference signal.
  • a communication device includes various modules for implementing functions of a network device in the methods in the foregoing aspects.
  • a computer program product includes computer program code that, when the computer program code runs on a computer, causes the computer to execute the methods in the above aspects.
  • the above computer program code may be stored in whole or in part on a first storage medium, where the first storage medium may be packaged with the processor, or may be packaged separately with the processor. This embodiment of the present application does not deal with this. Specific limitations.
  • a chip system includes a processor for a terminal device to implement the functions involved in the foregoing aspects, for example, generating, receiving, sending, or processing data involved in the foregoing methods and / Or information.
  • the chip system further includes a memory, and the memory is configured to store program instructions and data necessary for the terminal device.
  • the chip system may be composed of chips, and may also include chips and other discrete devices.
  • a chip system includes a processor for supporting a network device to implement the functions involved in the foregoing aspects, for example, generating, receiving, sending, or processing data involved in the foregoing methods. And / or information.
  • the chip system further includes a memory, and the memory is configured to store program instructions and data necessary for the network device.
  • the chip system may be composed of chips, and may also include chips and other discrete devices.
  • FIG. 2 is a schematic diagram of a communication method according to an embodiment of the present application.
  • FIG. 4 is a schematic diagram of a method for transmitting an uplink reference signal according to an embodiment of the present application.
  • FIG. 5 is a schematic diagram of a method for transmitting an uplink reference signal according to an embodiment of the present application.
  • FIG. 6 is a schematic diagram of a method for transmitting an uplink reference signal according to an embodiment of the present application.
  • FIG. 7 is a schematic diagram of a method for transmitting a downlink reference signal according to an embodiment of the present application.
  • FIG. 8 is a schematic block diagram of a communication device according to an embodiment of the present application.
  • FIG. 9 is a schematic block diagram of a communication device according to an embodiment of the present application.
  • FIG. 1 is a wireless communication system 100 applied in an embodiment of the present application.
  • the wireless communication system 100 may include a network device 110.
  • the network device 110 may be a device that communicates with the terminal device 120.
  • the network device 110 may provide communication coverage for a specific geographic area, and may communicate with terminal devices located within the coverage area.
  • the terminal device may include, but is not limited to, a terminal device applied in the Internet of Things.
  • the terminal device may be a terminal device connected to NB-IoT (may be referred to as a "NB-IoT terminal” ): Smart meter reading equipment, logistics tracking equipment, environmental monitoring equipment, etc .
  • the terminal may also include but is not limited to mobile stations (MS), mobile terminals (mobile terminals), mobile phones (mobile phones), user equipment ( user equipment (UE), mobile phones (handset), and portable equipment (portable equipment), etc.
  • the terminal equipment can communicate with one or more core networks via a radio access network (RAN), for example, the terminal equipment can It is a mobile phone (also called a "cellular" phone), a computer with wireless communication functions, etc.
  • the terminal device can also be a portable, pocket-sized, handheld, computer-built or vehicle-mounted mobile device.
  • the transmitting antenna of the uplink reference signal and the receiving antenna of the downlink reference signal are M physical antennas on the multiplexing terminal device.
  • both the receiving antenna for the uplink reference signal and the transmitting antenna for the downlink reference signal are N.
  • N may be a positive integer greater than or equal to 1.
  • the antenna weight used to indicate the parameters of the antenna, including the adjustment of the phase and amplitude of the transmitted or received signals on the antenna, where the amplitude can also be understood as power.
  • the third antenna weight vector is used to indicate the antenna weight used by each transmitting antenna in the downlink reference signal to transmit the downlink reference signal.
  • the third antenna weight vector can be expressed by ⁇ DL, Tx , and is N ⁇ Vector of 1.
  • the arrival time and transmission time of the reference signal can be defined in the process of frame synchronization. the same.
  • the receiving end for example, a network device or a terminal device
  • the receiving end can use the frame boundary of the receiving wireless frame as the arrival time of the reference signal, and the receiving end can also use the subframe of the receiving wireless frame.
  • the boundary is used as the time of arrival of the reference signal, or the receiving end uses the symbol boundary where the radio frame is received as the time of arrival of the reference signal, which is not specifically limited in this embodiment of the present application.
  • the network device sends time information of a specific clock system to the terminal device, and the time information is used to indicate the occurrence time of a specific event, for example, the time when a frame boundary of a downlink signal reaches the antenna interface of the network device.
  • the terminal device sends the above-mentioned time information T ref according to the timing advance amount N TA maintained by the local device and the network device, and estimates the receiving time of the corresponding frame boundary of the terminal device receiving the downlink signal. among them, Represents the time displayed by the network device clock when a certain frame boundary of the downlink signal reaches the interface of the receiving antenna of the terminal device; Represents the air interface propagation delay of the downlink reference signal.
  • the terminal device can obtain the time of the local clock when a specific event occurs on the terminal device.
  • the terminal can be based on with And the periodic characteristics of the wireless frame structure, to obtain the deviation value of the clock between the network device and the terminal, to achieve time synchronization.
  • the beam directions used to transmit the uplink signal and the downlink signal are not limited.
  • the uplink and downlink signals transmitted on the transmission paths in different beam directions are experienced by
  • the transmission time is also different, so that in the process of time synchronization or loopback delay detection, measurement errors due to different transmission times of wireless signals are introduced.
  • an embodiment of the present application provides a communication mechanism, in the process of transmitting the reference signal, limiting the receiving beam for the network device to receive the uplink signal and sending the downlink signal Transmit beam.
  • the terminal device is limited to a transmission beam for transmitting an uplink reference signal and a reception beam for receiving a downlink reference signal. That is, by limiting the above-mentioned beam directions, measurement errors are reduced.
  • the PTRS is used by the terminal device or the network device to estimate phase noise (or phase error, phase deviation, etc.) in a received signal. Further, the terminal device or the network device may also use the estimation result to process the phase noise in the received signal, such as correcting or compensating the phase noise.
  • FIG. 2 is a schematic diagram of a communication method according to an embodiment of the present application.
  • the method shown in FIG. 2 includes steps 210 and 220. It should be understood that the sequence of receiving the target downlink reference signal by 210 and sending the target uplink reference signal by 220 is not limited, and may be configured by the network device.
  • the target downlink reference signal sent by the network device to the terminal device.
  • the terminal device may use the first antenna weight vector to receive the target downlink reference signal sent by the network device.
  • the network device sends the target downlink reference signal according to the traditional transmission mode.
  • the above step 220 may specifically include three transmission modes of the target uplink reference signal.
  • the terminal device may send the target uplink reference signal to the network device by using the second antenna weight vector set.
  • the network device may use the fourth antenna weight vector to receive the terminal device to send the target uplink reference signal.
  • the terminal device may send the target uplink reference signal to the network device by using the second antenna weight vector set.
  • the network device sends the target downlink reference signal according to the traditional transmission mode.
  • the network device may use the fourth antenna weight vector to receive the terminal device to send the target uplink reference signal.
  • the terminal device can receive the target downlink reference signal sent by the network device according to the transmission mode of the transmission.
  • the relationship between the second antenna weight vector set and the first antenna weight vector may be that the ratio of the second antenna weight vector set and the weight range of the first antenna weight vector corresponding to the same antenna is the same, and / Or the second antenna weight vector set is the same as the weight phase corresponding to the same antenna in the first antenna weight vector.
  • first antenna weight vector and the second antenna weight vector set correspond to the same physical antenna.
  • the phases are the same, and the ratio of the amplitude of the first antenna weight vector to the amplitude of the same physical antenna in the second antenna weight vector set is the same.
  • the weight vector of the antenna receiving the downlink reference signal indicated by the first antenna weight vector is among them, Represents the weight used by antenna 1 to receive the target downlink reference signal, Indicates the phase used by antenna 1 to transmit the target downlink reference signal, and ⁇ 1 indicates the amplitude used by antenna 1 to transmit the target downlink reference signal; Indicates the weight used by antenna 2 to receive the target downlink reference signal, Indicates the phase used by antenna 2 to transmit the target downlink reference signal, and ⁇ 2 indicates the amplitude used by antenna 2 to transmit the target downlink reference signal.
  • the weight of the uplink reference signal sent by the antenna indicated by one antenna weight vector in the second antenna weight vector set among them Indicates the weight used by antenna 1 to send the target uplink reference signal, Indicates the phase used by antenna 1 to transmit the target uplink reference signal, and ⁇ 3 indicates the amplitude used by antenna 1 to transmit the target uplink reference signal; Indicates the weight used by antenna 2 to send the target uplink reference signal, Indicates the phase used by antenna 1 to transmit the target uplink reference signal, and ⁇ 4 indicates the amplitude used by antenna 1 to transmit the target uplink reference signal.
  • the ratio of the amplitude of the first antenna weight vector to the amplitude of the same physical antenna in the second antenna weight vector set is the same, and can be expressed as Especially when the first antenna weight vector and the second antenna weight vector set correspond to the same antenna; the first antenna weight vector and the second antenna weight vector set correspond to the same antenna phase, which can be expressed as
  • the weight vector of the uplink reference signal received by each antenna indicated in the fourth antenna weight vector is among them, Represents the weight used by antenna 1 to receive the target uplink reference signal, Indicates the phase used by antenna 1 to transmit the target uplink reference signal, and ⁇ 3 indicates the amplitude used by antenna 1 to transmit the target uplink reference signal; Indicates the weight used by antenna 2 to receive the target uplink reference signal, Indicates the phase used by antenna 2 to transmit the target uplink reference signal, and ⁇ 4 indicates the amplitude used by antenna 2 to transmit the target uplink reference signal.
  • the third antenna weight vector and the fourth antenna weight vector have the same ratio of the amplitude corresponding to the same antenna, and can be expressed as In particular, When the third antenna weight vector and the fourth antenna weight vector correspond to the same physical antenna, the third antenna weight vector and the fourth antenna weight vector have the same phase, which can be expressed as
  • the network device uses the fourth antenna weight to receive a target uplink reference signal on the at least one uplink transmission resource; the network device combines the target uplink reference signal and detects the target uplink reference The arrival time of the signal.
  • the uplink transmission resource may include at least one of a time domain resource, a frequency domain resource, and a code domain resource. As long as at least one of the three types of resources included in the transmission resource is different, it can be considered as different transmission resources.
  • the first antenna weight vector and the second antenna weight vector set are configured to adjust the spatial energy distribution of a beam transmitting a target uplink reference signal and the spatial energy distribution of a beam receiving a target downlink reference signal. So that the spatial energy distribution of the beam transmitting the target uplink reference signal is similar to the spatial energy distribution of the beam receiving the target downlink reference signal, which is beneficial to reduce the transmission error of the transmission target uplink signal and the transmission target downlink signal, and to reduce time synchronization or loop detection The error.
  • the third antenna weight vector and the fourth antenna weight vector are configured to adjust the spatial energy distribution of a beam receiving a target uplink reference signal and the spatial energy distribution of a beam transmitting a target downlink reference signal. Make the spatial energy distribution of the beam receiving the target uplink reference signal approximate the spatial energy distribution of the beam sending the target downlink reference signal, which is beneficial to reduce the transmission error of the transmission target uplink signal and the transmission target downlink signal, and to reduce the time synchronization or loop detection. error.
  • the first implementation method which uses multiple uplink transmission resources to send the target uplink reference signal
  • Each uplink transmission resource uses a different antenna, so that all antennas of the terminal device have a chance to send the target uplink reference signal.
  • the second implementation method the number of receiving antennas that receive the target downlink reference signal is reduced, so that The antenna is the same as the antenna occupied by the receiving target downlink reference signal.
  • the target uplink reference signal and the target downlink reference signal meet the constraints mentioned above, and the system can also follow Three implementation schemes are introduced to complete the configuration of the reference signal.
  • Implementation method one: Occupy multiple uplink transmission resources to send a target uplink reference signal.
  • the second antenna weight vector set may include multiple second antenna weight vectors. Each second antenna weight vector is applied to each corresponding uplink transmission resource, and indicates an antenna weight used when sending a target uplink reference signal.
  • the terminal device may determine the second antenna weight vector set according to the correspondence between the first antenna weight vector, the receiving antenna of the target downlink reference signal and the transmitting antenna of the target uplink reference signal.
  • the following describes a method for transmitting a reference signal according to an embodiment of the present application with reference to FIGS. 3 to 5. It should be understood that the method for transmitting a reference signal in the embodiment of the present application is only exemplified below by using a 1T2R terminal device, and does not limit the type of the terminal device to which the embodiments of the present application are applicable.
  • the terminal device can receive the target downlink reference signal sent by the network device through two antennas (antenna 1 and antenna 2), and the first antenna vector weight is
  • the terminal device sends the target uplink reference signal it can be divided into two rounds of sending the target uplink reference signal.
  • the target uplink reference signal can be sent to the network device through the antenna 1.
  • a method for the terminal device to determine the second antenna weight vector set according to the first antenna weight vector may include the terminal device determining the target downlink reference according to the first antenna weight vector. The antenna weight of each receiving antenna in the receiving antenna of the signal. Determining, by the terminal device, the antenna weight of each receiving antenna in the receiving antenna of the target downlink reference signal, and the correspondence between the sending antenna of the target uplink reference signal and the receiving antenna of the target downlink reference signal. The second antenna weight vector set is described.
  • the target uplink reference signal may be a sounding reference signal (sounding reference signal for antenna switching) (SRS for antenna switching) sent by the terminal device in an antenna switching mode.
  • SRS sounding reference signal for antenna switching
  • the SRS occupies multiple uplink transmission resources, and each uplink transmission The transmission antennas of the target uplink target reference signals corresponding to the resources are different.
  • the sending, by the terminal device, the target uplink reference signal to the network device according to the second antenna weight vector set includes: the terminal device, according to the second antenna weight vector set, occupying at least one uplink transmission resource to the network device Sending the target uplink reference signal.
  • Different antenna weight vectors in the second antenna weight vector set have different transmit antenna sets for the target uplink reference signal.
  • the set of transmit antennas of the target uplink reference signal corresponding to different uplink transmission resources in the at least one uplink transmission resource are different, and the switching method and transmission sequence of the set of transmit antenna sets used by the target uplink reference signal are specified by a protocol or by
  • the network device is configured to the terminal device through signaling or is preset.
  • the second antenna weight vector set includes at least one second antenna weight vector, and each second antenna weight vector is used to indicate an antenna weight of the P antennas of the M antennas to send the target uplink reference signal Value, where P is a positive integer and P is less than or equal to M.
  • the sending, by the terminal device, the target uplink reference signal to the network device may include: sending the target Q reference times to the network device for the target uplink reference signal through the P transmitting antennas according to the second antenna weight vector set. Uplink reference signal, where Q is greater than or equal to K, K and Q are positive integers.
  • the second antenna weight vector is generated in four different ways, that is, the function f ( ⁇ ) has four forms, and correspondingly, the network device receives the target uplink reference signal in four different ways. Approach.
  • the ratio of the second antenna weight vector set to the weight range of the same antenna in the first antenna weight vector is the same, and the second antenna weight vector set and the first antenna weight vector correspond to the same antenna.
  • the network device receives the target uplink reference signal by using the fourth antenna weight vector; the network device directly combines the target uplink reference signal and detects the arrival time of the uplink signal.
  • the signal weighting method of the terminal device only includes the amplitude information in the first antenna weight vector, and the phase information of the first antenna weight vector can be obtained by the network device as the weighted information of the target uplink reference signal. That is, the terminal device sends first information to the network device, and the first information includes phase information of the first antenna weight vector.
  • the network device determines a first weighting parameter according to the phase information, and combines the target uplink reference signal according to the first weighting parameter.
  • the first information may be information multiplexed in an existing communication system, for example, radio resource control (RRC) signaling, media access control layer control unit (MAC, control element, MAC). CE), downlink control information (downlink control information, DCI), etc.
  • RRC radio resource control
  • MAC media access control layer control unit
  • CE media access control layer control unit
  • DCI downlink control information
  • the above-mentioned first information may also be information newly configured specifically for transmitting phase information.
  • the types and combinations of the first information are not limited in the embodiments of the present application.
  • the second antenna weight vector set is the same as the phase corresponding to the same antenna in the first antenna weight vector, that is, among them It is a fixed angle rotation, which is determined by the terminal device. It can be understood that the signal weighting method of the terminal device only includes the phase information in the first antenna weight vector, and the antenna amplitude information is considered as the weighting information of the target uplink reference signal. Obtained by network equipment. That is, the terminal device sends second information to the network device, and the second information includes amplitude information of the first antenna weight vector. Correspondingly, the network device determines the second weighting parameter according to the amplitude information, and combines the target uplink reference signal according to the second weighting parameter.
  • the second information may be information multiplexed in an existing communication system, for example, RRC signaling, MAC CE, DCI, etc., and the second information may also be information newly configured specifically for transmitting phase information. This embodiment of the present application does not limit this.
  • the second antenna weight vector set does not include information of the first antenna weight vector.
  • the first antenna weight vector is used as weighting information of the target uplink reference signal by the network device.
  • a network device receives fourth information sent by the terminal device, the fourth information includes amplitude and phase information of a first antenna weight vector, and the first antenna weight vector indicates an antenna weight of a receiving antenna of the target downlink reference signal, The network device determines a fourth weighting parameter according to the first antenna weight vector, and combines the target uplink reference signal by using the fourth weighting parameter.
  • the antenna weight vector set may be a weighted value of a signal sent by each transmitting antenna of the terminal device; or may be a power adjustment of a reference signal and / or a phase adjustment of a reference signal during a target uplink reference signal generation process.
  • the target uplink reference signal may not use an antenna switching mode.
  • the second antenna weight vector set includes only one antenna weight vector.
  • the network device configures a target downlink reference signal and a target uplink reference signal for the terminal device, and the configuration information includes necessary parameters of the reference signal defined in a protocol such as a signal type of the reference signal and time-frequency resources.
  • the terminal device feeds back necessary information to the network device to determine a weighted value of the target uplink reference signal.
  • the terminal device sends the target uplink reference signal according to the configuration information and the second antenna weight vector.
  • the network device receives the target uplink reference signal and weights it according to a weighted value.
  • the first step to the fifth step in this embodiment are merely examples for understanding the technical solution of the present invention, and the execution steps of the foregoing implementation manner are not limited in sequence.
  • the terminal device determines the first antenna weight vector used by the target downlink reference signal and the target downlink according to the second antenna weight vector used by the target uplink reference signal and the transmitting antenna of the target uplink reference signal. Reference signal receiving antenna.
  • the following describes a method for transmitting a reference signal according to an embodiment of the present application with reference to FIGS. 6 to 7. It should be understood that the method for transmitting a reference signal in the embodiment of the present application is only exemplified below by using a 1T2R terminal device, and does not limit the type of the terminal device to which the embodiments of the present application are applicable.
  • the terminal device can send the target uplink reference signal to the network device through one antenna (antenna 1), and the second antenna weight vector set includes only one second antenna weight Value vector, the second antenna weight vector is
  • the terminal device can only receive the target downlink reference signal sent by the network device through antenna 1 (see FIG. 7), and the first antenna weight vector used by the terminal device to receive the target downlink reference signal is
  • the antenna weights of the antennas that do not send uplink signals in the second antenna weight vector are represented as 0; because all antennas of the terminal device receive downlink signals , The antenna weight of the antenna in the first antenna weight vector that does not need to receive or process the target downlink reference signal is set to 0.
  • the first antenna weight vector is only used to receive a target downlink reference signal, and is not used to receive other downlink signals.
  • the method further includes: determining, by the terminal device, a receiving antenna of the target downlink reference signal according to the transmission antenna of the target uplink reference signal, or the terminal device according to the first A transmitting antenna corresponding to the two antenna weight vectors determines a receiving antenna corresponding to the first antenna weight vector.
  • the method further includes: the terminal device determines the first antenna weight vector according to the second antenna weight vector, and the second antenna weight vector and the first antenna weight vector An antenna weight vector has the same weight corresponding to the same antenna.
  • the method further includes: the network device sends third information to the terminal device, where the third information is used to indicate a resource ID and resource ID of the target uplink reference signal.
  • the target downlink reference signal resource number is described.
  • the network equipment can configure the terminal equipment with the target uplink reference signal and target downlink reference signal that meet the above-mentioned transmission conditions (the number of transmitting and receiving antennas used, the antenna weight used by each antenna, etc.) as time synchronization, or a loop detection delay.
  • Group reference signal the number of transmitting and receiving antennas used, the antenna weight used by each antenna, etc.
  • the network device configures a target uplink reference signal for the terminal device, and the configuration information includes necessary parameters of the reference signal defined in a protocol such as a signal type of the reference signal and time-frequency resources.
  • the target uplink reference signal is a new uplink reference signal configured independently, or a reference signal selected from existing uplink reference signals.
  • the network device configures a target downlink reference signal for the terminal device.
  • the target downlink reference signal may be a new downlink reference signal that is independently configured, and the configuration information includes the necessary parameters of the reference signal defined in the protocol such as the signal type of the reference signal and time-frequency resources; it may also be a multiplexed existing downlink reference signal.
  • the terminal device determines a first antenna weight vector.
  • the terminal device obtains the second antenna weight vector of the target uplink reference signal according to an existing procedure of the protocol.
  • a first antenna weight vector set is determined according to the second antenna weight vector.
  • the terminal device uses the first antenna weight vector instead of the original antenna weight vector to receive the target downlink reference signal.
  • the terminal device receives the target downlink reference signal according to the configuration information and the first antenna weight vector.
  • the terminal device receives the target uplink reference signal, and detects the arrival time of the downlink signal.
  • the third solution is to configure the terminal equipment to use part of the antenna to ensure that the terminal equipment uses the same antenna to receive downlink signals and send uplink signals. Because the current protocol does not explicitly specify the type of the reference signal for detecting the arrival time of the uplink signal. Therefore, in order not to affect the protocol of the uplink channel, the receiving antenna of the downlink channel needs to be limited.
  • the network device uses the third antenna weight vector to receive the first channel sent by the terminal device, and the first channel carries the first data signal and the target downlink reference signal; the network device uses the fourth antenna weight vector to receive the first channel sent by the terminal device.
  • a second channel where the second channel carries a second data signal and the target uplink reference signal.
  • the first channel may be a physical downlink shared channel (PDSCH), and the second channel may be a physical downlink shared channel (PUSCH).
  • the network device may be based on the first channel and the second channel. Reciprocity, configure a first antenna weight vector, a second antenna weight vector set, a third antenna weight vector, and a fourth antenna weight vector.
  • the target uplink reference signal may be DMRS or a combination of DMRS and PTRS.
  • the following describes the method for the network device to determine the third antenna weight vector and the fourth antenna weight vector. It should be noted that the method for the network device to determine the foregoing antenna weight vector may be the same as that of the terminal device for determining the first antenna weight vector and The method of the second antenna weight vector set is used in combination.
  • the network device determines a fourth antenna weight vector according to the correspondence between the third antenna weight vector, the transmitting antenna of the target downlink reference signal and the receiving antenna of the target uplink reference signal, and the fourth antenna weight vector is related to the The ratio of the antenna weights corresponding to the same antenna in the third antenna weight vector is the same.
  • the network device determines a third antenna weight vector according to the correspondence between the fourth antenna weight vector, the receiving antenna of the target uplink reference signal and the transmitting antenna of the target downlink reference signal, and the fourth antenna weight vector is related to the The ratio of the antenna weights corresponding to the same antenna in the third antenna weight vector is the same.
  • the communication method according to the embodiment of the present application is described in detail above with reference to FIG. 1 to FIG. 7.
  • the device of the embodiment of the present application is described in detail below with reference to FIGS. 8 to 11. It should be understood that the apparatus shown in FIG. 8 to FIG. 11 can implement each step in FIG. 1 to FIG. 7. To avoid repetition, details are not described herein again.
  • FIG. 8 is a schematic diagram of a communication device according to an embodiment of the present application.
  • the device is configured to perform a behavior function of a terminal device in the foregoing method embodiment.
  • the apparatus 800 shown in FIG. 8 includes a receiving module 810 and a sending module 820, where:
  • a sending module 820 configured to send a target uplink reference signal to the network device by using a second antenna weight vector set
  • the ratio of the second antenna weight vector set to the weight range of the first antenna corresponding to the same antenna in the first antenna weight vector set is the same, and / or the second antenna weight vector set and the first antenna
  • the weight vectors corresponding to the same antenna in the weight vector have the same phase.
  • the processing module is specifically configured to determine, according to the first antenna weight vector, an antenna weight of each receiving antenna in the receiving antenna of the target downlink reference signal, according to the The antenna weight of each receiving antenna in the receiving antenna of the target downlink reference signal, and the correspondence between the sending antenna of the target uplink reference signal and the receiving antenna of the target downlink reference signal, and determining the second antenna weight vector set.
  • the sending module is specifically configured to occupy at least one uplink transmission resource according to a second antenna weight vector set, and send the target uplink reference signal to the network device, and the second The target uplink reference signal transmitting antenna sets corresponding to different antenna weight vector sets in the antenna weight vector set are different, and the target uplink reference signal transmitting antennas corresponding to different uplink transmission resources in the at least one uplink transmission resource are different.
  • the collection is different.
  • the sending module is further configured to: when the second antenna weight vector set is the same as the first antenna weight vector corresponding to the weight range of the same antenna, The network device sends first information, and the first information includes phase information of the first antenna weight vector.
  • the sending module is further configured to send the second antenna weight vector set to the network device when the second antenna weight vector set has the same phase as the corresponding antenna in the first antenna weight vector.
  • Second information including amplitude information of the first antenna weight vector.
  • the processing module is further configured to: when the second antenna weight vector set includes a second antenna weight vector, use the second antenna used according to the target uplink reference signal
  • the antenna weight vector and the transmitting antenna of the target uplink reference signal determine the first antenna weight vector used by the target downlink reference signal and the receiving antenna of the target downlink reference signal.
  • the receiving module is further configured to receive third information from the network device, where the third information is used to indicate a resource number of the target uplink reference signal and the target downlink reference Signal resource number.
  • the processing module is further configured to determine a receiving antenna of the target downlink reference signal according to the transmitting antenna of the target uplink reference signal, or determine a receiving antenna corresponding to the second antenna weight vector according to The transmitting antenna determines a receiving antenna corresponding to the first antenna weight vector.
  • the processing module is further configured to determine the first antenna weight vector according to the second antenna weight vector, and the second antenna weight vector and the first antenna weight The weights corresponding to the same antenna in the value vector are the same.
  • the receiving module is further configured to use the first antenna weight vector to receive a first channel sent by the network device, where the first channel carries a first data signal and all data signals.
  • the target downlink reference signal uses the second antenna weight vector to send a second channel to the network device, and the second channel carries a second data signal and the target uplink reference signal.
  • the receiving module 810 may be a receiver
  • the sending module 820 may be a transmitter
  • the processing module may be a processor
  • FIG. 9 is a schematic diagram of a communication apparatus according to an embodiment of the present application.
  • the apparatus is configured to perform a behavior function of a terminal device in the foregoing method embodiment.
  • the apparatus 900 shown in FIG. 9 includes a sending module 910 and a receiving module 920, where:
  • the receiving module 920 is configured to use the first antenna weight vector to receive a target downlink reference signal sent by the network device.
  • the terminal device sends the fourth information to the network device, so that the network device determines the weighting parameters of multiple uplink transmission resources of the target uplink reference signal according to the first antenna weight vector.
  • the transmission weight of the target uplink reference signal is obtained according to a calculation method specified in an existing protocol, so that the generation method of the uplink reference signal is maintained, and the uplink reference signal transmission rule of the terminal device is maintained.
  • the antenna weight of the transmitting antenna of the target downlink reference signal is determined according to a third antenna weight vector, and the third antenna weight vector and the fourth antenna weight vector correspond to the same antenna And the fourth antenna weight vector is the antenna weight vector of the receiving antenna transmitting the uplink reference signal.
  • the sending module is further configured to send the fourth information to the network device, where the fourth information is carried in at least one of the following information: downlink control information DCI, Radio resource control RRC and media intervention control layer control unit MAC CE.
  • the sending module 910 may be a transmitter, and the receiving module 920 may be a receiver.
  • a sending module 1010 configured to send a target downlink reference signal to a terminal device by using a third antenna weight vector
  • the receiving module 1020 is configured to use a fourth antenna weight vector to receive a target uplink reference signal sent by the sending module, wherein the third antenna weight vector and the fourth antenna weight vector correspond to antennas of the same antenna.
  • the weight ratio is the same.
  • the apparatus further includes: a processing module, configured to receive a target downlink reference signal sent by the sending module and a target uplink received by the receiving module according to a third antenna weight vector.
  • a processing module configured to receive a target downlink reference signal sent by the sending module and a target uplink received by the receiving module according to a third antenna weight vector.
  • a fourth antenna weight vector is determined, and the fourth antenna weight vector has the same proportion of the antenna weights corresponding to the same antenna in the third antenna weight vector, wherein the The third antenna weight vector is used to indicate the antenna weight of the transmitting antenna of the target downlink reference signal, and the fourth weight vector is used to indicate the antenna weight of the receiving antenna of the target uplink reference signal.
  • the receiving module is configured to use the fourth antenna weight to receive the target uplink reference signal on the at least one uplink transmission resource
  • the processing module is further configured to combine the target uplink reference signal and detect an arrival time of the target uplink reference signal.
  • the method receiving module is configured to receive first information sent by a terminal device, where the first information includes phase information of a first antenna weight vector, and the first antenna weight vector indicates An antenna weight of a receiving antenna of the target downlink reference signal.
  • the processing module is specifically configured to determine a first weighting parameter according to the phase information, and combine the target uplink reference signal according to the first weighting parameter.
  • the receiving module is further configured to receive second information sent by a terminal device, where the second information includes amplitude information of the first antenna weight vector, and the first antenna weight The vector indicates an antenna weight of a receiving antenna of the target downlink reference signal.
  • the combining, by the network device, the target uplink reference signal includes: determining, by the network device, a second weighting parameter according to the amplitude information, and determining a second weighting parameter according to the second weighting parameter.
  • the target uplink reference signals are combined.
  • the receiving module is further configured to receive fourth information sent by the terminal device, where the fourth information includes a first antenna weight vector, and the first antenna weight vector indicates The antenna weight of the receiving antenna of the target downlink reference signal is described.
  • the processing module is specifically configured to determine a third weighting parameter according to the first antenna weight vector, and use the third weighting parameter to combine the target uplink reference signals.
  • the processing module is further configured to determine the target downlink reference signal corresponding to the target uplink reference signal, or determine the corresponding downlink reference signal according to the target downlink reference signal.
  • Target uplink reference signal is further configured to determine the target downlink reference signal corresponding to the target uplink reference signal, or determine the corresponding downlink reference signal according to the target downlink reference signal.
  • the above-mentioned device 1000 may also be a network device, the sending module 1010 may be a transmitter, the receiving module 1020 may be a transmitter, and the processing module may be a processor.
  • the device 800 may be a communication device 1100, the receiving module 810 and the sending module 820 may be transceivers 1140, and the communication device 1100 may further include an input / output interface 1130 and a memory. 1110, as shown in Figure 11.
  • the communication apparatus may be a terminal device.
  • the device 900 may be a communication device 1100, the sending module 910 and the receiving module 920 may be transceivers 1140, and the communication device 1100 may further include an input / output interface 1130 and a memory. 1112, as shown in Figure 11.
  • the communication apparatus may be a terminal device.
  • the device 1000 may be a communication device 1100, the sending module 1010 and the receiving module 1020 may be transceivers 1140, and the network device 1100 may further include an input / output interface 1130 and a memory. 1112, as shown in Figure 11.
  • the communication apparatus may be a network device.
  • FIG. 11 is a schematic block diagram of a communication apparatus according to another embodiment of the present application.
  • the communication device 1100 shown in FIG. 11 may include a memory 1110, a processor 1120, an input / output interface 1130, and a transceiver 1140.
  • the memory 1110, the processor 1120, the input / output interface 1130, and the transceiver 1140 are connected through an internal connection path.
  • the memory 1110 is used to store instructions
  • the processor 1120 is used to execute instructions stored in the memory 1110 to control input /
  • the output interface 1130 receives input data and information, outputs data such as operation results, and controls the transceiver 1140 to send signals.
  • the processor may be a central processing unit (CPU), and the processor may also be another general-purpose processor, digital signal processor (DSP), or special-purpose integration.
  • Circuit application specific integrated circuit, ASIC
  • ready-made programmable gate array field programmable gate array, FPGA
  • a general-purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
  • the foregoing communication system may be the communication system 100 shown in FIG. 1, or a modification of the communication system 100.
  • B corresponding to A means that B is associated with A, and B can be determined according to A.
  • determining B based on A does not mean determining B based on A alone, but also determining B based on A and / or other information.
  • the size of the sequence numbers of the above processes does not mean the order of execution.
  • the execution order of each process should be determined by its function and internal logic, and should not deal with the embodiments of the present application.
  • the implementation process constitutes any limitation.
  • the disclosed systems, devices, and methods may be implemented in other ways.
  • the device embodiments described above are only schematic.
  • the division of the unit is only a logical function division.
  • multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, which may be electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objective of the solution of this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each of the units may exist separately physically, or two or more units may be integrated into one unit.
  • the computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be from a website site, computer, server, or data center Transmission by wire (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) to another website site, computer, server, or data center.
  • the computer-readable storage medium may be any available medium that can be read by a computer or a data storage device such as a server, a data center, and the like that includes one or more available medium integration.
  • the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a digital video disc (DVD)), or a semiconductor medium (for example, a solid state disk (SSD) )Wait.
  • a magnetic medium for example, a floppy disk, a hard disk, a magnetic tape
  • an optical medium for example, a digital video disc (DVD)
  • DVD digital video disc
  • SSD solid state disk

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

Abstract

La présente invention concerne un procédé et un appareil de communication, ainsi qu'un système de communication. Le procédé comporte les étapes suivantes: un dispositif terminal reçoit, en utilisant un premier vecteur de poids d'antenne, un signal de référence cible de liaison descendante émis par un dispositif de réseau; et le dispositif terminal envoie un signal de référence cible de liaison montante au dispositif de réseau en utilisant un second ensemble de vecteurs de poids d'antenne, les proportions d'amplitudes de poids, correspondant à la même antenne, dans le second ensemble de vecteurs de poids d'antenne et le premier vecteur de poids d'antenne étant les mêmes, et/ou des phases de poids, correspondant à la même antenne, dans le second ensemble de vecteurs de poids d'antenne et le premier vecteur de poids d'antenne étant les mêmes. Une amélioration dans la précision d'une synchronisation temporelle ou d'un calcul de retard temporel d'aller-retour d'interface radio est facilitée.
PCT/CN2019/098979 2018-08-10 2019-08-02 Procédé et appareil de communication, et système de communication WO2020029873A1 (fr)

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