WO2023272602A1 - Procédés de transmission de signal, dispositifs de réseau et terminaux - Google Patents

Procédés de transmission de signal, dispositifs de réseau et terminaux Download PDF

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Publication number
WO2023272602A1
WO2023272602A1 PCT/CN2021/103675 CN2021103675W WO2023272602A1 WO 2023272602 A1 WO2023272602 A1 WO 2023272602A1 CN 2021103675 W CN2021103675 W CN 2021103675W WO 2023272602 A1 WO2023272602 A1 WO 2023272602A1
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Prior art keywords
signal
network device
sensing signal
sensing
csi
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PCT/CN2021/103675
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English (en)
Chinese (zh)
Inventor
苏进喜
张治�
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Oppo广东移动通信有限公司
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Priority to CN202180097179.5A priority Critical patent/CN117242365A/zh
Priority to PCT/CN2021/103675 priority patent/WO2023272602A1/fr
Publication of WO2023272602A1 publication Critical patent/WO2023272602A1/fr

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00

Definitions

  • the present application relates to the field of communication technologies, and more specifically, to a method for transmitting signals, a network device, and a terminal.
  • wireless communication systems and sensing systems for example, radar detection systems
  • MIMO multiple-in multiple-out
  • the wireless communication system and the sensing system are still two separate systems, resulting in a low utilization rate of time-frequency resources in each system.
  • the present application provides a signal transmission method, network equipment and terminal, so as to improve the utilization rate of time-frequency resources in a wireless communication system.
  • a method for transmitting signals including: a network device generates a first sensing signal, part of the first sensing signal is a communication signal for a terminal, and the first sensing signal uses Sensing the surrounding environment of the network device; sending the first sensing signal by the network device.
  • a method for transmitting signals including: the terminal receives a communication signal sent by a network device, the communication signal is a part of the first sensing signal, and the first sensing signal is used to detect the surrounding environment of the network device for sensing.
  • a network device including: a generating unit configured to generate a first sensing signal, a part of the first sensing signal is a communication signal for a terminal, and the first sensing signal uses Sensing the surrounding environment of the network device; a sending unit, configured to send the first sensing signal generated by the generating unit.
  • a terminal including: a receiving unit, configured to receive a communication signal sent by a network device, where the communication signal is a part of a first sensing signal, and the first sensing signal is used to analyze the surrounding environment of the network device for sensing.
  • a network device including a memory and a processor, the memory is used to store a program, and the processor is used to call the program in the memory to execute the method as described in the first aspect.
  • a terminal including a memory and a processor, the memory is used to store programs, and the processor is used to invoke the programs in the memory to execute the method described in the second aspect.
  • an apparatus including a processor, configured to call a program from a memory to execute the method described in the first aspect.
  • an apparatus including a processor, configured to call a program from a memory to execute the method described in the second aspect.
  • a ninth aspect provides a chip, including a processor, configured to call a program from a memory, so that a device installed with the chip executes the method described in the first aspect.
  • a chip including a processor, configured to call a program from a memory, so that a device installed with the chip executes the method described in the second aspect.
  • a computer-readable storage medium on which a program is stored, and the program causes a computer to execute the method described in the first aspect.
  • a computer-readable storage medium on which a program is stored, and the program causes a computer to execute the method described in the second aspect.
  • a thirteenth aspect provides a computer program product, including a program, the program causes a computer to execute the method described in the first aspect.
  • a fourteenth aspect provides a computer program product, including a program, the program causes a computer to execute the method described in the second aspect.
  • a fifteenth aspect provides a computer program, the computer program causes a computer to execute the method described in the first aspect.
  • a sixteenth aspect provides a computer program, the computer program causes a computer to execute the method described in the second aspect.
  • Part of the first sensing signal is used as a communication signal for the terminal, so that the network device can communicate with the terminal by sending the first sensing signal on the time-frequency resource of the communication system, and can also transmit the first sensing signal Sensing the surrounding environment of network equipment avoids the situation that the traditional wireless communication system and the sensing system are independent of each other.
  • the time-frequency resources of the wireless communication system are only used to send communication signals, and the time-frequency resources of the sensing system are only used Sending the sensing signal is beneficial to improving the utilization rate of time-frequency resources in the wireless communication system.
  • FIG. 1 is a wireless communication system 100 applied in an embodiment of the present application.
  • Fig. 2 is a flowchart of a method for transmitting a signal according to an embodiment of the present application.
  • FIG. 3 is a schematic diagram of time-frequency resources occupied by a first sensing signal in an embodiment of the present application.
  • FIG. 4 is a schematic diagram of time-frequency resources occupied by transmitting a first sensing signal in another embodiment of the present application.
  • FIG. 5 is a schematic diagram of time-frequency resources occupied by transmitting a first sensing signal according to an embodiment of the present application.
  • FIG. 6 is a schematic diagram of a fusion manner of a CSI-RS used for beam management and a first sensing signal according to an embodiment of the present application.
  • FIG. 7 is a schematic diagram of a fusion method of a TRS and a first sensing signal according to an embodiment of the present application.
  • FIG. 8 is a schematic diagram of a fusion manner of a CSI-RS and a first sensing signal according to an embodiment of the present application.
  • FIG. 9 is an architecture diagram of a single-station sensing system according to an embodiment of the present application.
  • FIG. 10 is an architecture diagram of a dual-station or multi-station joint sensing system according to an embodiment of the present application.
  • FIG. 11 is a schematic diagram of a network device according to an embodiment of the present application.
  • Figure 12 is a schematic diagram of a terminal according to an embodiment of the present application.
  • Fig. 13 is a schematic structural diagram of a device for transmitting signals 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 and a terminal 120 .
  • the network device 110 may be a device that communicates with the terminal 120 .
  • the network device 110 may provide communication coverage for a specific geographic area, and may communicate with the terminals 120 located within the coverage area.
  • Figure 1 exemplarily shows one network device and two terminals.
  • the wireless communication system 100 may include multiple network devices and each network device may include other numbers of terminals within the coverage area. Examples are not limited to this.
  • the wireless communication system 100 may further include other network entities such as a network controller and a mobility management entity, which is not limited in this embodiment of the present application.
  • network entities such as a network controller and a mobility management entity, which is not limited in this embodiment of the present application.
  • the technical solutions of the embodiments of the present application can be applied to various communication systems, for example: the fifth generation (5th generation, 5G) system or new radio (new radio, NR), long term evolution (long term evolution, LTE) system , LTE frequency division duplex (frequency division duplex, FDD) system, LTE time division duplex (time division duplex, TDD), etc.
  • the technical solutions provided in this application can also be applied to future communication systems, such as the sixth generation mobile communication system, and satellite communication systems, and so on.
  • the terminal in the embodiment of the present application may also be referred to as user equipment (user equipment, UE), access terminal, subscriber unit, subscriber station, mobile station, mobile station (mobile station, MS), mobile terminal (mobile terminal, MT) , a remote station, a remote terminal, a mobile device, a user terminal, a terminal device, a wireless communication device, a user agent, or a user device.
  • the terminal in the embodiment of the present application may be a device that provides voice and/or data connectivity to users, and may be used to connect people, objects and machines, such as handheld devices with wireless connection functions, vehicle-mounted devices, and the like.
  • the terminal in the embodiment of the present application can be mobile phone (mobile phone), tablet computer (Pad), notebook computer, palmtop computer, mobile internet device (mobile internet device, MID), wearable device, virtual reality (virtual reality, VR ) equipment, augmented reality (augmented reality, AR) equipment, wireless terminals in industrial control (industrial control), wireless terminals in self driving (self driving), wireless terminals in remote medical surgery (remote medical surgery), smart grid Wireless terminals in (smart grid), wireless terminals in transportation safety, wireless terminals in smart city, wireless terminals in smart home, etc.
  • UE can be used to act as a base station.
  • a UE may act as a scheduling entity that provides sidelink signals between UEs in V2X or D2D, etc.
  • a cell phone and an automobile communicate with each other using sidelink signals. Communication between cellular phones and smart home devices without relaying communication signals through base stations.
  • the network device in this embodiment of the present application may be a device for communicating with a terminal, and the network device may also be called an access network device or a wireless access network device, for example, the network device may be a base station.
  • the network device in this embodiment of the present application may refer to a radio access network (radio access network, RAN) node (or device) that connects a terminal to a wireless network.
  • radio access network radio access network, RAN node (or device) that connects a terminal to a wireless network.
  • the base station can broadly cover various names in the following, or replace with the following names, such as: Node B (NodeB), evolved base station (evolved NodeB, eNB), next generation base station (next generation NodeB, gNB), relay station, Access point, transmission point (transmitting and receiving point, TRP), transmission point (transmitting point, TP), primary station MeNB, secondary station SeNB, multi-standard wireless (MSR) node, home base station, network controller, access node , wireless node, access point (access piont, AP), transmission node, transceiver node, base band unit (base band unit, BBU), remote radio unit (remote radio unit, RRU), active antenna unit (active antenna unit) , AAU), radio head (remote radio head, RRH), central unit (central unit, CU), distributed unit (distributed unit, DU), positioning nodes, etc.
  • NodeB Node B
  • evolved base station evolved NodeB, eNB
  • a base station may be a macro base station, a micro base station, a relay node, a donor node, or the like, or a combination thereof.
  • a base station may also refer to a communication module, a modem or a chip configured in the aforementioned equipment or device.
  • the base station can also be a mobile switching center, a device that undertakes the function of a base station in D2D, vehicle-to-everything (V2X), machine-to-machine (M2M) communication, and a device in a 6G network.
  • Base stations can support networks of the same or different access technologies. The embodiments of the present application do not limit the specific technology and specific equipment form adopted by the network equipment.
  • Base stations can be fixed or mobile.
  • a helicopter or drone can be configured to act as a mobile base station, and one or more cells can move according to the location of the mobile base station.
  • a helicopter or drone may be configured to serve as a device in communication with another base station.
  • the network device in this embodiment of the present application may refer to a CU or a DU, or, the network device includes a CU and a DU.
  • a gNB may also include an AAU.
  • Network equipment and terminals can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; they can also be deployed on aircraft, balloons and satellites in the air. In the embodiment of the present application, the scenarios where the network devices and terminals are located are not limited.
  • the functions of the communication device for example, a terminal or network device
  • the functions of the communication device may also be realized by software functions running on hardware, or by virtualization functions instantiated on a platform (such as a cloud platform) to fulfill.
  • wireless communication systems and sensing systems eg, radar detection systems
  • MIMO transmission MIMO transmission
  • beamforming technology e.g., beamforming technology
  • the sensing signal and the communication signal are fused to form an integrated communication and sensing signal (ICSS), hereinafter referred to as "First Sensing Signal”.
  • IDS integrated communication and sensing signal
  • the network device can not only sense the surrounding environment through the first sensing signal, but also communicate with the terminal through the communication signal included in the first sensing signal.
  • first sensing signal in the embodiment of the present application may also be called “first sensing signal”
  • second sensing signal may also be called “second sensing signal”
  • the first sensing signal” and the “second sensing signal” may also be other signals with the same function but different names in the future communication system, which is not limited in this embodiment of the present application.
  • the flow of the signal transmission method according to the embodiment of the present application will be introduced below with reference to FIG. 2 .
  • the method shown in FIG. 2 includes steps S210 to S230.
  • the network device generates a first sensing signal.
  • Part of the first sensing signal is a communication signal for the terminal, and the first sensing signal is used to sense the surrounding environment of the network device.
  • Part of the above-mentioned first sensing signal is a communication signal for the terminal. It can be understood that the first sensing signal is carried in the first signal sequence, and a part of the signal sequence in the first signal sequence is used to carry the communication signal. Or it can also be understood that the communication signal is one of multiple signals included in the first sensing signal.
  • the above-mentioned first signal sequence may be multiplexed with a signal sequence specified in the existing communication system.
  • the first signal sequence may be multiplexed with a pseudo random code PN (Pseudo noise sequence) sequence.
  • PN pseudo random code
  • the first signal sequence may multiplex an M sequence of a channel state information reference signal (channel state information reference signal, CSI-RS) specified in 5G NR.
  • the first signal sequence may also be multiplexed with a ZC (Zadoff-Chu) sequence.
  • the above-mentioned communication signal can be understood as a signal transmitted between the network device and the terminal through a wireless link, for example, it can be a reference signal (reference signal, RS), a signal for carrying downlink control information (downlink control information, DCI) or a Signals for carrying downlink data.
  • RS reference signal
  • DCI downlink control information
  • the aforementioned sensing of the surrounding environment of the network device may include sensing the surrounding environment itself, for example, reconstructing the surrounding environment.
  • the aforementioned sensing of the surrounding environment of the network device may also include sensing objects in the surrounding environment.
  • the network device can perceive the orientation, shape, moving speed, moving track, etc. of the target through the first sensing signal.
  • the network device sends a first sensing signal.
  • the network device After the network device sends the first sensing signal, it may sense the surrounding environment based on the echo signal of the first sensing signal. In some implementation manners, the network device may receive an echo signal reflected by the target object or the surrounding environment with respect to the first sensing signal, and sense the surrounding environment based on a propagation delay of the echo signal. In some other implementation manners, the network device may measure the azimuth of the echo signal based on the echo signal, extract extended information, and sense the azimuth of the target object.
  • the network device sending the first sensing signal and the network device receiving the echo signal are the same network device.
  • the above-mentioned network device for sending the first sensing signal and the network device for receiving the echo signal may also be different network devices, which will be introduced below in conjunction with FIG. 9 to FIG. 10 .
  • no repeat for the sake of brevity, no repeat.
  • the terminal obtains the communication signal from the first sensing signal sent by the network device. In other words, the terminal receives the communication signal sent by the network device.
  • S230 may be understood as the terminal receiving the communication signal among the multiple signals.
  • S230 may include the terminal acquiring the communication signal from the first sensing signal according to the position of the communication signal in the first sensing signal.
  • the communication signal may be carried in a part of the first signal sequence, so in order to obtain the communication signal, the terminal needs to determine the position of the sequence carrying the communication signal in the first signal sequence, so that the terminal can obtain the communication signal from the first signal sequence. A sequence carrying a communication signal is intercepted from the sensing signal.
  • the terminal may determine the position of the communication signal in the first sensing signal based on the starting position of the sequence carrying the communication signal and the length of the sequence carrying the communication signal. For another example, the terminal may determine the position of the communication signal in the first sensing signal based on the end position of the sequence carrying the communication signal and the length of the sequence carrying the communication signal.
  • the embodiment of the present application does not specifically limit the manner in which the terminal determines the position of the communication signal in the first sensing signal.
  • the terminal may determine the position of the communication signal in the first sensing signal based on the stipulations of the communication protocol. In some other implementation manners, the terminal may also determine the position of the communication signal in the first sensing signal based on the indication information sent by the network device. The following will introduce a solution for the terminal to determine the position of the communication signal in the first sensing signal based on the indication information with reference to FIG. 5 . For the sake of brevity, details are not repeated here.
  • part of the first sensing signal is used as a communication signal for the terminal, so that the network device can communicate with the terminal by sending the first sensing signal on the time-frequency resource of the communication system, and at the same time
  • the surrounding environment of the network equipment is sensed, avoiding the situation that the traditional wireless communication system and the sensing system are independent of each other, the time-frequency resources of the wireless communication system are only used to send communication signals, and the time-frequency resources of the sensing system are only used to Sending the sensing signal is beneficial to improving the utilization rate of time-frequency resources in the wireless communication system.
  • the terminal only needs to obtain the communication signal from the first sensing signal, and there is no high requirement on the processing capability of the terminal. Therefore, the solution in the embodiment of the present application can be compatible with the current large part terminal.
  • the network device needs to sense the surrounding environment based on the echo signal of the first sensing signal. That is to say, the larger the frequency domain bandwidth occupied by the transmission of the first sensing signal is, the greater the energy of the first sensing signal is, and the higher the sensing accuracy is.
  • the communication between network devices and terminals usually does not need to occupy too much frequency domain bandwidth. Therefore, the frequency domain bandwidth occupied by the first sensing signal may be configured to include the frequency domain bandwidth occupied by the communication signal. In other words, the frequency domain bandwidth occupied by the first sensing signal includes the frequency domain bandwidth occupied by the communication signal, and the frequency domain bandwidth occupied by the first sensing signal is larger than the frequency domain bandwidth occupied by the communication signal.
  • the bandwidth occupied by the communication signal is the carrier bandwidth
  • the frequency domain bandwidth occupied by the first sensing signal is larger than the carrier bandwidth.
  • the bandwidth occupied by the communication signal is a bandwidth part (bandwidth part, BWP)
  • the frequency domain bandwidth occupied by the first sensing signal is larger than the BWP.
  • all of the maximum bandwidth corresponding to the radio frequency bandwidth capability of the network device may be configured for transmitting the first sensing signal.
  • the embodiment of the present application does not specifically limit the frequency domain bandwidth occupied by the first sensing signal.
  • the time domain resource occupied by the first sensing signal multiplexed with the communication signal can be configured, for example , when the communication signal occupies a resource unit in the time domain, the first sensing signal occupies the same time domain resource as the communication signal. For another example, when the communication signal occupies one time-domain symbol, the first sensing signal occupies the same time-domain symbol as the communication signal.
  • the time-frequency resource occupied by the first sensing signal is introduced below with reference to FIG. 3 to FIG. 4 , taking the bandwidth occupied by the communication signal as BWP or carrier bandwidth as an example.
  • FIG. 3 is a schematic diagram of time-frequency resources occupied by a first sensing signal in an embodiment of the present application.
  • the maximum bandwidth corresponding to the radio frequency bandwidth capability of the network device is 400MHz
  • the network device only establishes one carrier with a carrier bandwidth of 100MHz, and configures a BWP of 40MHz to send communication signals to the terminal.
  • the network device can be configured to transmit the first sensing signal and the communication signal on the same time domain symbol, and configure the frequency domain bandwidth occupied by the first sensing signal to be transmitted to be 400 MHz, including the BWP for transmitting the communication signal. Accordingly, the terminal can only receive communication signals on the BWP.
  • FIG. 4 is a schematic diagram of time-frequency resources occupied by transmitting a first sensing signal in another embodiment of the present application.
  • the network device Assuming that the maximum bandwidth corresponding to the RF bandwidth capability of the network device is 800MHz, the network device has established four carriers with a carrier bandwidth of 200MHz, namely carrier 0, carrier 1, carrier 2 and carrier 3, and configured carrier 1 and carrier 2 To send communication signals to the terminal.
  • the network device can be configured to transmit the first sensing signal and the communication signal on the same time domain symbol, and can configure the frequency domain bandwidth occupied by the first sensing signal to be transmitted to be 800 MHz, including the carrier bandwidth for transmitting the communication signal.
  • the waveform of the first sensing signal can adopt an orthogonal frequency division multiplexing (OFDM) waveform, and inherit OFDM has the advantages of simple implementation, high spectrum efficiency, and flexible resource allocation.
  • OFDM orthogonal frequency division multiplexing
  • the first sensing signal is configured to be continuously mapped on each subcarrier in the frequency domain, so as to improve the resolution of the sensing signal in terms of ranging.
  • the first sensing signal may also be configured to be mapped in a comb-shaped resource mapping manner, so as to reduce interference between first sensing signals corresponding to different cells.
  • the first sensing signal may be mapped in a 3-times-combed comb resource mapping manner, that is, every 3 subcarriers are mapped to a frequency point.
  • the first sensing signal may be mapped in a 6-fold comb resource mapping manner, that is, every 6 subcarriers are mapped to a frequency point.
  • the terminal may determine the position of the communication signal in the first sensing signal based on the indication information sent by the network device. .
  • the indication information is used to indicate at least one of the following information: the bandwidth occupied by the first sensing signal, the frequency domain mapping pattern of the first sensing signal, the bandwidth occupied by the communication signal, and the frequency domain of the communication signal starting point.
  • the bandwidth occupied by the first sensing signal can be represented by the number of resource blocks (resource block, RB) occupied by the first sensing signal
  • the bandwidth occupied by the communication signal can be represented by the number of RB occupied by the communication signal.
  • the network device may transmit the above instruction information through an existing instruction in the communication system, for example, the network device may carry the above instruction in radio resource control (radio resource control, RRC) signaling.
  • the network device may also transmit the above instruction information through other instructions in the future communication system.
  • the network device may also send the above indication information through dedicated signaling. This embodiment of the present application does not limit it.
  • FIG. 5 is a schematic diagram of time-frequency resources occupied by transmitting a first sensing signal according to an embodiment of the present application.
  • the maximum bandwidth corresponding to the bandwidth radio frequency capability of the network device is 800 MHz, and the network device uses the entire bandwidth 510 to transmit the first sensing signal. test signal.
  • the network device configures the BWP in the carrier bandwidth to transmit the communication signal to the terminal.
  • the network device can indicate the frequency domain resource for the terminal to receive the communication signal by sending indication information to the terminal.
  • the indication information includes the bandwidth occupied by the transmission communication signal 520 and the frequency domain start position 521 of the transmission communication signal.
  • the frequency domain start location may be indicated by the bandwidth 522 between the frequency domain reference point and the frequency domain start location.
  • the terminal may determine frequency domain resources for transmitting communication signals according to the frequency domain starting position 510 for transmitting communication signals and the bandwidth 520 occupied by transmitting communication signals.
  • CSI-RS is similar to the sensing signal transmission mode to a certain extent in time-frequency tracking, beam management, channel quality measurement and other application scenarios, for example , both of which are transmitted through narrow beams in the high frequency band. Therefore, the degree of adaptation between the first sensing signal and the CSI-RS is relatively high. It should be noted that the CSI-RS mentioned in the embodiment of the present application may also be other signals with similar functions but different names in future communication systems.
  • the following will introduce the fusion scheme of the first sensing signal and the CSI-RS based on the transmission modes of the CSI-RS in three scenarios of beam management, time-frequency tracking and channel quality measurement respectively. It should be understood that for the sequence of the first sensing signal and the configuration manner of the first sensing signal in the time-frequency domain, reference may be made to the introduction above, and details will not be described below.
  • a network device In order to implement beam management of the CSI-RS, a network device usually performs beam scanning in multiple directions in units of time-domain symbols. Correspondingly, the terminal measures the signal strength of each beam direction, and feeds back the measurement results to the network device, so that the network device can select a matching beam to communicate with the terminal. Therefore, in different time domain symbols, the network device will pass multiple beam directions Different beams transmit CSI-RS.
  • the first sensing signal can be configured to multiplex CSI-RS time domain resources, that is, the time domain symbols occupied by the first sensing signal and the CSI-RS The occupied time domain signs are the same.
  • the beam for transmitting the first sensing signal is multiplexed with the beam for transmitting the CSI-RS.
  • the above communication signal is the first CSI-RS
  • the first CSI-RS is one of multiple CSI-RSs used for beam management
  • multiple CSI-RSs are carried in multiple sensing signals
  • multiple The beam directions of the CSI-RS are different
  • the beam directions of the plurality of sensing signals are consistent with the beam directions of the corresponding CSI-RS.
  • FIG. 6 shows a schematic diagram of a fusion manner of a CSI-RS used for beam management and a first sensing signal according to an embodiment of the present application.
  • the network device sends the physical downlink control channel (physical downlink control channel, PDCCH) and the physical downlink shared channel (physical downlink shared channel, PDSCH) to the terminal on the BWP within the carrier bandwidth, it will usually be in the last 4
  • the CSI-RS used for beam management is sent on consecutive time-domain symbols, and the beam directions of the beams in different time-domain symbols among the 4 time-domain symbols are different.
  • time domain symbol #1 the network device uses beam 610 to transmit CSI-RS.
  • time domain symbol #2 the network device uses beam 620 to transmit the CSI-RS.
  • the network device uses beam 630 to transmit the CSI-RS.
  • the network device uses beam 640 to transmit the CSI-RS.
  • the first sensing signal occupies the maximum bandwidth corresponding to the radio frequency capability of the network device.
  • the above-mentioned 4 time-domain symbols for transmitting the CSI-RS may be multiplexed, and beams corresponding to the 4 time-domain symbols are multiplexed to transmit the first sensing signal. That is, in the time domain symbol #1, the network device uses the beam 610 to send the first sensing signal. In time domain symbol #2, the network device uses beam 620 to send the first sensing signal. In time domain symbol #3, the network device uses the beam 630 to send the first sensing signal. In time domain symbol #4, the network device uses the beam 640 to send the first sensing signal.
  • the CSI-RS used for beam management is fused with the first sensing signal, so that The first sensing signal can also be transmitted through multiple beams with different beam directions, which is beneficial to expand the range of the sensing area of the first sensing signal.
  • the CSI-RS used for time-frequency tracking is also called tracking reference signal (TRS).
  • TRS tracking reference signal
  • the network device usually configures TRS transmitted by beams with the same beam direction, and the multiple time-domain symbols occupied by the transmitted TRS are discontinuous.
  • the TRS resource set specified in NR for TRS transmission may include 4 discontinuous time domain symbols located in 2 time slots.
  • the TRS resource set for TRS transmission may include two discontinuous time domain symbols within one time slot.
  • the beam for transmitting the first sensing signal may be configured to be multiplexed with the beam for transmitting the TRS.
  • the first sensing signal may be configured to multiplex TRS time domain resources, that is, the time domain symbols occupied by the first sensing signal are the same as the time domain symbols occupied by the TRS.
  • FIG. 7 shows a schematic diagram of a fusion manner of a TRS and a first sensing signal according to an embodiment of the present application.
  • the network device sends a physical downlink control channel (physical downlink control channel, PDCCH) and a physical downlink shared channel (physical downlink shared channel, PDSCH) to the terminal on the BWP within the carrier bandwidth.
  • PDCCH physical downlink control channel
  • PDSCH physical downlink shared channel
  • the TRS will be sent interspersed on the time domain symbol #1 and the time domain symbol #2.
  • the network device transmits the TRS in the time-domain symbol #1 and the time-domain symbol #2, the beams used have the same beam direction.
  • the first sensing signal occupies the maximum bandwidth corresponding to the radio frequency capability of the network device.
  • the above-mentioned time-domain symbols for transmitting the TRS may be multiplexed, namely time-domain symbol #1 and time-domain symbol #2.
  • beams corresponding to time-domain symbol #1 and time-domain symbol #2 are multiplexed to transmit the first sensing signal.
  • the first sensing signal is fused with the transmission method of TRS, so that the network device sends the first sensing signal at a certain time interval through the same beam direction, so as to realize the speed measurement of the target object in the surrounding environment function.
  • the network device For the CSI-RS used for channel quality measurement, the network device usually transmits the CSI-RS on the last time domain symbol in a time slot for service data transmission, so that the terminal can perform channel quality measurement.
  • the signal transmitted by the network device in the entire time slot is aimed at a certain fixed terminal, and the network device does not need to perform beam switching in the entire time slot.
  • the beam for transmitting the first sensing signal may be configured to be multiplexed with the beam for transmitting the CSI-RS.
  • the first sensing signal may be configured to multiplex the CSI-RS time domain resource, that is, the first sensing signal may be transmitted on the last 1 time domain symbol.
  • FIG. 8 shows a schematic diagram of a fusion manner of a CSI-RS and a first sensing signal according to an embodiment of the present application.
  • time domain symbols 0-1 are used to transmit PDCCH
  • time domain symbols 2-12 are used to transmit PDSCH
  • the last time domain symbol is used to transmit CSI-RS , so that the terminal can perform channel quality measurement.
  • the first sensing signal occupies the maximum bandwidth corresponding to the radio frequency capability of the network device.
  • the time-domain symbols for transmitting the CSI-RS can be multiplexed, that is, the last time-domain symbol.
  • the first sensing signal is transmitted by the multiplexed transmission beam of the CSI-RS.
  • the network device may not configure resources for the terminal to transmit the CSI-RS in the traffic slot. At this time, if the network device needs to transmit the first sensing signal, it may occupy the time domain symbol transmission of the PDSCH channel. Generally, in order to reduce the impact of transmitting the first sensing signal on data transmission, the first sensing signal may be transmitted in the last one time domain symbol.
  • the fusion scheme of the first sensing signal and the data signal in the PDSCH channel will be slightly complicated. Therefore, in order to reduce the complexity, some time domain symbols can be selected from the time domain symbols occupied by the PDSCH channel to transmit the first sensing signal, and, These time-domain symbols that transmit the first sensing signal will no longer transmit data to the terminal.
  • the indication information may be carried in the control information, for example, transmitted through the PDCCH transmitted in the time domain symbols 0-1 shown in FIG. 8 .
  • the network device sends the first sensing signal to sense the direction of the terminal at the opportunity of service transmission to the terminal, and configures the indication information to instruct the terminal to skip the time frame occupied by the first sensing signal.
  • the time-domain symbol prevents the terminal from affecting the accuracy of data decoding due to receiving the first sensing signal.
  • the network device can directly use the downlink time-frequency resources that are not occupied by communication signals (that is, idle downlink time-frequency resources) resources) to send the second sensing signal to sense the surrounding environment of the network device, which is beneficial to improving the utilization rate of time-frequency resources in the wireless communication system.
  • the network device may transmit the second sensing signal in a beam scanning manner, and the time granularity of beam switching may be at the symbol level in the time domain.
  • the network device may also perform beam scanning in a time division multiplexing (time division multiplexing, TDM) manner, and transmit the second sensing signal.
  • the network device may also transmit the second sensing signal through a beam with a fixed beam direction.
  • the way of transmitting the second sensing signal can be determined based on the usage of the second sensing signal. For example, for the second sensing signal for sensing the speed of the target object, the network device may transmit the second sensing signal at a certain time interval through beams with the same beam direction. For another example, for the second sensing signal of ambient environment sensing, the network device may transmit the second sensing signal through multiple beams with different beam directions.
  • the receiving end of the echo signal of the first sensing signal may be the same network device as the network device sending the first sensing signal, which is also called “single station sensing".
  • the network device is required to have full-duplex capability, that is, the sending channel and the receiving channel of the network device can work simultaneously on the same working frequency band. This way of working can generally be called “active perception” from the perspective of perception.
  • the network device itself can complete the sensing of the surrounding environment, and there is no high requirement for the cooperation performance between the network devices, and the implementation is relatively simple.
  • the receiving end of the echo signal of the first sensing signal may also be a different network device from the network device sending the first sensing signal, which is also called “dual-station or multi-station joint sensing". That is, the network device (that is, the sender) that sends the first sensing signal does not receive the echo signal itself, but is received by other network devices (that is, the receiver).
  • the receiver is arranged at a certain distance and orientation from the sender. In this case, the sender and receiver usually need to have high-precision time synchronization capability, and the receiver can accurately know the precise position and orientation of the sender. This way of working is generally called passive sensing from the perspective of perception.
  • multiple network devices need to cooperate to complete the sensing of the surrounding environment, avoiding the time-division switching mechanism of a network device sending and receiving, resulting in the inability to sense Targets that are relatively close to network devices have ranging blind spots.
  • FIG. 9 The following will introduce the two working modes respectively with reference to FIG. 9 to FIG. 10 . It should be understood that the functions of the network devices and terminals in FIG. 9 and FIG. 10 are similar to those in FIG. 1 , and for the sake of brevity, details will not be described below.
  • FIG. 9 is an architecture diagram of a single-station sensing system according to an embodiment of the present application.
  • the first sensing signal is transmitted by the network device 910, and correspondingly, the network device 910 also receives the echo signals reflected back by the target object 920 and the target object 930 respectively, so as to achieve detection of the target object 920 and the target object. 930 sensing.
  • the terminal 940 receives the communication signal in the first sensing signal.
  • FIG. 10 is an architecture diagram of a dual-station or multi-station joint sensing system according to an embodiment of the present application.
  • the network device 1010 transmits the first sensing signal, and correspondingly, the network device 1020 receives the echo signal reflected by the target 1030 to realize the sensing of the target 1030 .
  • the terminal 1040 receives the communication signal in the first sensing signal.
  • FIG. 11 is a schematic diagram of a network device according to an embodiment of the present application.
  • the network device 1100 shown in FIG. 11 includes a generating unit 1110 and a sending unit 1120 .
  • the generating unit 1110 is configured to generate a first sensing signal, wherein a part of the first sensing signal is a communication signal for a terminal, and the first sensing signal is used to sense the surrounding environment of the network device.
  • the sending unit 1120 is configured to send the first sensing signal generated by the generating unit.
  • the first sensing signal and the communication signal occupy the same time domain resource, and/or the frequency domain bandwidth occupied by the first sensing signal includes the frequency domain bandwidth occupied by the communication signal.
  • the frequency domain bandwidth occupied by the first sensing signal is the maximum bandwidth corresponding to the radio frequency bandwidth capability of the network device.
  • the bandwidth occupied by the communication signal is carrier bandwidth or BWP.
  • the first sensing signal occupies a resource unit in the time domain.
  • the network device further includes: a receiving unit configured to receive an echo signal of the first sensing signal; a sensing unit configured to sense the surrounding environment based on the echo signal.
  • the first sensing signal is sent using an OFDM waveform.
  • the first sensing signal is configured to be continuously mapped on each subcarrier in the frequency domain, or mapped in a comb-shaped resource mapping manner.
  • the first sensing signal is carried in a first signal sequence, and part of the signal sequence in the first signal sequence is used to carry the communication signal.
  • the first signal sequence is a pseudo-random code PN sequence or a ZC sequence.
  • the sending unit 1120 is further configured to send indication information to the terminal, where the indication information is used to indicate at least one of the following information: the bandwidth occupied by the first sensing signal, the second A frequency-domain mapping pattern of the sensing signal, a frequency-domain bandwidth of the communication signal, and a frequency-domain starting position of the communication signal.
  • the communication signal is a first channel state information reference signal CSI-RS
  • the first CSI-RS is one of multiple CSI-RSs used for beam management
  • multiple CSI-RSs are carried on multiple sensing signals Among them, the beam directions of the multiple CSI-RSs are different, and the beam directions of the multiple sensing signals are consistent with the beam directions of the respective corresponding CSI-RSs.
  • the communication signal is the second CSI-RS, and the second CSI-RS is used for time-frequency tracking.
  • the communication signal is a third CSI-RS
  • the third CSI-RS is used for channel quality measurement.
  • the communication signal is used to carry a reference signal, downlink control information or downlink data.
  • the generating unit 1110 is further configured to generate a second sensing signal when there is no communication signal transmission between the network device and the terminal and the network device needs to sense the surrounding environment, and the second sensing signal is used for Sensing the surrounding environment of the network device; the sending unit 1120 is further configured to send a second sensing signal on downlink time-frequency resources not occupied by communication signals.
  • Fig. 12 is a schematic diagram of a terminal according to an embodiment of the present application.
  • the terminal 1200 shown in FIG. 12 includes a receiving unit 1210 .
  • the receiving unit 1210 is configured to receive a communication signal sent by the network device, the communication signal is a part of the first sensing signal, and the first sensing signal is used to sense the surrounding environment of the network device.
  • the first sensing signal and the communication signal occupy the same time domain resource, and/or the frequency domain bandwidth occupied by the first sensing signal includes the frequency domain bandwidth occupied by the communication signal.
  • the frequency domain bandwidth occupied by the first sensing signal is the maximum bandwidth corresponding to the radio frequency bandwidth capability of the network device.
  • the bandwidth occupied by the communication signal is carrier bandwidth or BWP.
  • the first sensing signal occupies a resource unit in the time domain.
  • the first sensing signal is sent using an OFDM waveform.
  • the first sensing signal is configured to be continuously mapped on each subcarrier in the frequency domain, or mapped in a comb-shaped resource mapping manner.
  • the first sensing signal is carried in the first signal sequence, and part of the signal sequence in the first signal sequence is used to carry the communication signal.
  • the first signal sequence is a pseudo-random code PN sequence or a ZC sequence.
  • the above-mentioned terminal 1200 further includes a determining unit 1220, and the receiving unit 1210 is also configured to receive indication information sent by the network device, the indication information is used to indicate at least one of the following information: the bandwidth occupied by the first sensing signal, the bandwidth occupied by the second A frequency domain mapping pattern of a sensing signal, a frequency domain bandwidth of the communication signal, and a frequency domain starting position of the communication signal; the determining unit 1220 is configured to determine the position of the communication signal in the first sensing signal based on the indication information; the receiving The unit 1210 is specifically configured to acquire the communication signal from the first sensing signal based on the position.
  • the communication signal is a first channel state information reference signal CSI-RS
  • the first CSI-RS is one of multiple CSI-RSs used for beam management
  • multiple CSI-RSs are carried on multiple sensing signals Among them, the beam directions of the multiple CSI-RSs are different, and the beam directions of the multiple sensing signals are consistent with the beam directions of the respective corresponding CSI-RSs.
  • the communication signal is the second CSI-RS, and the second CSI-RS is used for time-frequency tracking.
  • the communication signal is a third CSI-RS
  • the third CSI-RS is used for channel quality measurement.
  • the communication signal is a reference signal, a signal for carrying downlink control information or a signal for carrying downlink data.
  • Fig. 13 is a schematic structural diagram of a device for transmitting signals according to an embodiment of the present application.
  • the dashed line in Figure 13 indicates that the unit or module is optional.
  • the apparatus 1300 may be used to implement the methods described in the foregoing method embodiments.
  • Apparatus 1300 may be a chip, a terminal or a network device.
  • Apparatus 1300 may include one or more processors 1310 .
  • the processor 1310 may support the apparatus 1300 to implement the methods described in the foregoing method embodiments.
  • the processor 1310 may be a general purpose processor or a special purpose processor.
  • the processor may be a central processing unit (central processing unit, CPU).
  • the processor can also be other general-purpose processors, digital signal processors (digital signal processors, DSPs), application specific integrated circuits (application specific integrated circuits, ASICs), off-the-shelf programmable gate arrays (field programmable gate arrays, FPGAs) Or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.
  • a general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like.
  • Apparatus 1300 may also include one or more memories 1320 .
  • a program is stored in the memory 1320, and the program can be executed by the processor 1310, so that the processor 1310 executes the methods described in the foregoing method embodiments.
  • the memory 1320 may be independent from the processor 1310 or may be integrated in the processor 1310 .
  • Apparatus 1300 may also include a transceiver 1330 .
  • the processor 1310 can communicate with other devices or chips through the transceiver 1330 .
  • the processor 1310 may send and receive data with other devices or chips through the transceiver 1330 .
  • the embodiment of the present application also provides a computer-readable storage medium for storing programs.
  • the computer-readable storage medium can be applied to the terminal or the network device provided in the embodiments of the present application, and the program enables the computer to execute the methods performed by the terminal or the network device in the various embodiments of the present application.
  • the embodiment of the present application also provides a computer program product.
  • the computer program product includes programs.
  • the computer program product can be applied to the terminal or the network device provided in the embodiments of the present application, and the program enables the computer to execute the methods performed by the terminal or the network device in the various embodiments of the present application.
  • the embodiment of the present application also provides a computer program.
  • the computer program can be applied to the terminal or the network device provided in the embodiments of the present application, and the computer program enables the computer to execute the methods performed by the terminal or the network device in the various embodiments of the present application.
  • the sensing system may also be referred to as a "perception system”, and the sensing system may also refer to other systems with similar functions but different names.
  • determining B according to A does not mean determining B only according to A, and B may also be determined according to A and/or other information.
  • sequence numbers of the above-mentioned processes do not mean the order of execution, and the execution order of the processes should be determined by their functions and internal logic, and should not be used in 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 illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in 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, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.
  • all or part of them may be implemented by software, hardware, firmware or any combination thereof.
  • software When implemented using software, it may be implemented in whole or in part in the form of a computer program product.
  • the computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the processes or functions according to the embodiments of the present application will be generated in whole or in part.
  • the computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website, computer, server or data center Transmission to another website site, computer, server or data center by wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.).
  • 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 or a data center integrated with one or more available media.
  • the available medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a digital versatile disc (digital video disc, DVD)) or a semiconductor medium (for example, a solid state disk (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 versatile disc (digital video disc, DVD)
  • a semiconductor medium for example, a solid state disk (solid state disk, SSD)

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne des procédés de transmission de signaux, des dispositifs de réseau et des terminaux. Un procédé comprend : la génération, par un dispositif de réseau, d'un premier signal de détection, une partie du premier signal de détection étant un signal de communication pour un terminal, et le premier signal de détection servant à détecter l'environnement du dispositif de réseau ; et l'envoi, par le dispositif de réseau, du premier signal de détection. En utilisant une partie d'un premier signal de détection comme signal de communication pour un terminal, un dispositif de réseau peut ainsi communiquer avec le terminal en envoyant le premier signal de détection sur des ressources temps-fréquence d'un système de communication et, en même temps, l'environnement du dispositif de réseau peut également être détecté au moyen du premier signal de détection, ce qui permet d'éviter, quand des systèmes de communication sans fil et systèmes de détection classiques sont indépendants les uns des autres, d'utiliser les ressources temps-fréquence d'un système de communication sans fil pour envoyer uniquement des signaux de communication et les ressources temps-fréquence d'un système de détection pour envoyer uniquement des signaux de détection, ce qui facilite l'amélioration du taux d'utilisation des ressources temps-fréquence dans un système de communication sans fil.
PCT/CN2021/103675 2021-06-30 2021-06-30 Procédés de transmission de signal, dispositifs de réseau et terminaux WO2023272602A1 (fr)

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CN202180097179.5A CN117242365A (zh) 2021-06-30 2021-06-30 传输信号的方法、网络设备及终端
PCT/CN2021/103675 WO2023272602A1 (fr) 2021-06-30 2021-06-30 Procédés de transmission de signal, dispositifs de réseau et terminaux

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WO2024188166A1 (fr) * 2023-03-14 2024-09-19 索尼集团公司 Dispositif électronique et procédé pour système de communication sans fil, et support de stockage

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WO2014125447A1 (fr) * 2013-02-18 2014-08-21 University Of Cape Town Système symbiotique de communication et de radar
CN109565497A (zh) * 2016-09-28 2019-04-02 华为技术有限公司 环境感知方法以及基站
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WO2014125447A1 (fr) * 2013-02-18 2014-08-21 University Of Cape Town Système symbiotique de communication et de radar
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