WO2023011110A1 - Procédé et appareil de communication - Google Patents

Procédé et appareil de communication Download PDF

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Publication number
WO2023011110A1
WO2023011110A1 PCT/CN2022/104684 CN2022104684W WO2023011110A1 WO 2023011110 A1 WO2023011110 A1 WO 2023011110A1 CN 2022104684 W CN2022104684 W CN 2022104684W WO 2023011110 A1 WO2023011110 A1 WO 2023011110A1
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cyclic shifts
rotate
cyclic
reference signal
cyclic shift
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PCT/CN2022/104684
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English (en)
Chinese (zh)
Inventor
张荻
龚名新
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华为技术有限公司
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Publication of WO2023011110A1 publication Critical patent/WO2023011110A1/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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/08—Testing, supervising or monitoring using real traffic

Definitions

  • the embodiments of the present application relate to the field of communication technologies, and in particular, to a communication method and device.
  • reference signal sequences such as demodulation reference signal (demodulation reference signal, DMRS) sequence and sounding reference signal (sounding reference signal, SRS)
  • the sequence is a sequence generated according to the base sequence (base sequence, BS), where the base sequence can be a sequence generated by a ZC (Zadoff-Chu) sequence, such as the ZC sequence itself, or a sequence generated by a ZC sequence through cyclic shift, Or intercept the generated sequence for the ZC sequence.
  • base sequence base sequence
  • ZC Zero-Chu
  • different reference signal sequences can be obtained by using different cyclic shifts.
  • the network device may allocate different cyclic shifts to different antenna ports of the terminal device to ensure the orthogonality of reference signal sequences between different antenna ports and avoid interference.
  • the existing cyclic shift allocation is to allocate equal-spaced cyclic shifts to different antenna ports of the same terminal device. As the number of antenna ports increases or the number of available cyclic shifts decreases, the existing equal-spaced allocation The way of cyclic shift cannot meet the requirement, in this case, how to assign cyclic shift to the antenna ports becomes a problem to be solved.
  • Embodiments of the present application provide a communication method and device for allocating cyclic shifts to antenna ports when the existing method of allocating cyclic shifts at equal intervals cannot allocate cyclic shifts to antenna ports.
  • the embodiment of the present application provides a communication method, the method includes: determining the number X of antenna ports and the maximum number of cyclic shifts of the reference signal
  • the X is a positive integer; the reference signal is sent on the same time-frequency resource, and the reference signal is generated according to X cyclic shifts, wherein the X cannot be determined by the divisible, the X cyclic shifts are The cyclic shifts with different values and unequal intervals among the cyclic shifts.
  • sending reference signals including X antenna ports on the same time-frequency resource indicates that the resource elements (resource element, RE) occupied by the reference signals of X antenna ports are the same, for example, the time-frequency resource may be on the same symbol Multiple consecutive REs or multiple REs at equal intervals on the same symbol (that is, comb teeth).
  • the number of antenna ports X of the reference signal cannot be determined by the maximum cyclic shift number of the reference signal Evenly divisible, when it is not possible to assign cyclic shifts to the antenna ports at equal intervals, you can use the Among the cyclic shifts, X cyclic shifts with different values and unequal intervals are determined and allocated to the antenna ports, so as to support the transmission of the reference signal by the terminal device when the cyclic shifts cannot be allocated to the antenna ports at equal intervals.
  • the X cyclic shifts are the Rotate ⁇ Rotate 0, Rotate 1, ..., Rotate ⁇ remove ⁇ circular shift i, cyclic shift cyclic shift ..., cyclic shift ⁇ outside the cyclic shift, wherein, the cyclic shift 0, cyclic shift 1, ..., cyclic shift yes Circular shifts sorted in ascending order and equally spaced, the i is greater than or equal to 0 and less than any integer of .
  • the i is indicated by a network device.
  • the X cyclic shifts that meet the above requirements are determined from the cyclic shifts, which can guarantee The rest of the cyclic shifts except X cyclic shifts
  • the orthogonality of each cyclic shift enables multiple terminal devices to implement code division multiplexing by using different cyclic shifts on the same time-frequency resource, which is beneficial to improve resource utilization.
  • the X cyclic shifts include the One of the following cyclic shifts; cyclic shift 1, cyclic shift 2, cyclic shift 4, cyclic shift 5; or, cyclic shift 0, cyclic shift 2, cyclic shift 3, cyclic shift Bit 5; or, Rotate 0, Rotate 1, Rotate 3, Rotate 4.
  • the terminal device sending the reference signal including 2 antenna ports and the terminal device sending the reference signal including 4 antenna ports send reference signals in the same time-frequency resource, and they are orthogonal to each other, so as to improve resource utilization.
  • the X cyclic shifts are indicated by indication information from the network device, where the indication information is used to indicate the The X cyclic shifts in the cyclic shifts.
  • the indication information may be a bitmap or an index number; wherein, the bitmap is used to indicate the The distribution of the X cyclic shifts in the cyclic shifts; the index number is used to indicate one of a plurality of cyclic shift sets, wherein each cyclic shift set consists of The set of cyclic shifts indicated by the index number is composed of the X cyclic shifts.
  • the implementation manners of the network device instructing the cyclic shift to the terminal device are enriched, which is beneficial to meet different communication requirements.
  • the method before sending the reference signal on the same time-frequency resource, the method further includes: generating X reference signal sequences according to the X cyclic shifts; generating X reference signal sequences according to the X reference signal sequences; A signal sequence generates the reference signal.
  • the embodiment of the present application provides a communication method, the method includes: determining the number M of comb teeth used for sending reference signals, and the M is determined by X and Determined by the greatest common factor R, the X is the number of antenna ports of the reference signal, the is the maximum number of cyclic shifts on a comb, the X, the is a positive integer, and the M is an integer greater than 1; the reference signal is sent on M comb teeth.
  • the number of antenna ports X in the reference signal cannot be shifted by the maximum number of cyclic shifts on a comb Evenly divisible, when the cyclic shift cannot be allocated at equal intervals to the antenna ports, the number of comb teeth occupied by the reference signal resource can be flexibly configured, and the antenna ports included in the reference signal correspond to multiple comb teeth, and each comb tooth is an antenna Ports are allocated with cyclic shifts at equal intervals, so as to support the transmission of reference signals by terminal equipment.
  • the M consists of X and
  • the determination of the greatest common factor R includes: said M is equal to the value of said X divided by said R.
  • each of the M combs corresponds to R antenna ports, where the R antenna ports correspond to R cyclic shifts, and the R cyclic shifts are The values in the R cyclic shifts are different and equally spaced cyclic shifts, and the reference signal sent on the comb teeth is generated according to the R cyclic shifts.
  • the M comb teeth are continuous, or the M comb teeth are equally spaced.
  • the embodiment of the present application provides a communication method, the method includes: receiving a reference signal including X antenna ports on the same time-frequency resource; performing channel estimation according to the reference signal and the X reference signal sequences, the The X reference signal sequences are generated according to X cyclic shifts, wherein the X cannot be divisible, the is the maximum cyclic shift number of the reference signal, and the X cyclic shifts are The cyclic shifts with different values and unequal intervals among the cyclic shifts.
  • the X cyclic shifts are the Rotate ⁇ Rotate 0, Rotate 1, ..., Rotate ⁇ remove ⁇ circular shift i, cyclic shift cyclic shift ..., cyclic shift ⁇ outside the cyclic shift, wherein, the cyclic shift 0, cyclic shift 1, ..., cyclic shift yes Circular shifts sorted from small to large and equally spaced, the i is greater than or equal to 0 and less than an integer of .
  • the X cyclic shifts include One of the following cyclic shifts; cyclic shift 1, cyclic shift 2, cyclic shift 4, cyclic shift 5; or, cyclic shift 0, cyclic shift 2, cyclic shift 3, cyclic shift Bit 5; or, Rotate 0, Rotate 1, Rotate 3, Rotate 4.
  • the method further includes: indicating the i to a terminal device sending the reference signal.
  • the X cyclic shifts are indicated by indication information, where the indication information is used to indicate the The X cyclic shifts in the cyclic shifts.
  • the indication information may be a bitmap or an index number; wherein, the bitmap is used to indicate the The distribution of the X cyclic shifts in the cyclic shifts; the index number is used to indicate one of a plurality of cyclic shift sets, wherein each cyclic shift set consists of The set of cyclic shifts indicated by the index number is composed of the X cyclic shifts.
  • the method further includes: sending the indication information to a terminal device that sends the reference signal.
  • the embodiment of the present application provides a communication method, the method includes: determining the number M of comb teeth, and the M is determined by X and Determined by the greatest common factor R, the X is the number of antenna ports of the reference signal, the is the maximum cyclic shift number on a comb, the X, the is a positive integer, and the M is an integer greater than 1; the reference signal is received on M comb teeth.
  • the M consists of X and
  • the determination of the greatest common factor R includes: said M is equal to the value of said X divided by said R.
  • each of the M combs corresponds to R antenna ports, where the R antenna ports correspond to R cyclic shifts, and the R cyclic shifts are The values in the R cyclic shifts are different and equally spaced cyclic shifts, and the reference signal sent on the comb teeth is generated according to the R cyclic shifts.
  • the M comb teeth are continuous, or the M comb teeth are equally spaced.
  • the embodiment of the present application provides a communication device, which has a method to realize the above-mentioned first aspect or any one of the possible design methods of the first aspect, or realize the above-mentioned second aspect or any one of the second aspect
  • the functions of the method in the possible designs may be realized by hardware, or by executing corresponding software by hardware.
  • the hardware or software includes one or more modules (or units) corresponding to the above functions, such as a transceiver unit and a processing unit.
  • the device may be a chip or an integrated circuit.
  • the device includes a memory and a processor, and the memory is used to store a program executed by the processor.
  • the program is executed by the processor, the device can perform any of the above-mentioned first aspect or the first aspect.
  • the device may be a terminal device.
  • the embodiment of the present application provides a communication device, which has a method in design to realize the above third aspect or any possible design of the third aspect, or realize the above fourth aspect or any one of the fourth aspect
  • the functions of the method in the possible designs may be realized by hardware, or by executing corresponding software by hardware.
  • the hardware or software includes one or more modules (or units) corresponding to the above functions, such as a transceiver unit and a processing unit.
  • the device may be a chip or an integrated circuit.
  • the device includes a memory and a processor, and the memory is used to store a program executed by the processor.
  • the program is executed by the processor, the device can perform any of the third aspect or the third aspect.
  • the device may be a network device.
  • the embodiment of the present application provides a communication system, the communication system includes a terminal device and a network device, and the terminal device can execute the method in the above-mentioned first aspect or any possible design of the first aspect,
  • the network device may execute the method in the third aspect or any possible design of the third aspect; or the terminal device may execute the method in the second aspect or any possible design of the second aspect , the network device may execute the method in any possible design of the fourth aspect or the fourth aspect.
  • the embodiments of the present application provide a computer-readable storage medium, in which computer programs or instructions are stored, and when the computer programs or instructions are executed by a communication device, the above-mentioned first aspect or the first aspect can be realized.
  • the method described in any possible design of one aspect, or realize the method described in any possible design of the above second aspect or the second aspect, or realize the above third aspect or any of the third aspects The method described in one possible design, or the method described in any possible design for realizing the fourth aspect or the fourth aspect.
  • the embodiment of the present application also provides a computer program product, including computer programs or instructions, when the computer programs or instructions are executed by the communication device, any possible design of the above-mentioned first aspect or the first aspect can be realized
  • a computer program product including computer programs or instructions, when the computer programs or instructions are executed by the communication device.
  • the embodiment of the present application also provides a chip, the chip is coupled with the memory, and is used to read and execute the program or instruction stored in the memory to realize the above first aspect or any possibility of the first aspect
  • the method described in the design, or the method described in the second aspect or any possible design of the second aspect, or the third aspect or any possible design of the third aspect The method described above, or the method described in implementing the fourth aspect or any possible design of the fourth aspect.
  • FIG. 1 is a schematic structural diagram of a mobile communication system applied in an embodiment of the present application
  • FIG. 2A and FIG. 2B are schematic diagrams of communication scenarios provided by the embodiment of the present application.
  • FIG. 3A and FIG. 3B are schematic diagrams of the comb teeth occupied by the reference signal provided by the embodiment of the present application;
  • FIG. 4 is a schematic diagram of multiplexing the same time-frequency resource by reference signals of different terminal devices provided in an embodiment of the present application;
  • FIG. 5 is one of the schematic diagrams of the communication method provided by the embodiment of the present application.
  • FIG. 6 is one of the schematic diagrams of the comb teeth occupied by the SRS provided by the embodiment of the present application.
  • FIG. 7 is the second schematic diagram of the communication method provided by the embodiment of the present application.
  • FIG. 8 is one of the schematic diagrams of the distribution of cyclic shift values on the comb teeth provided by the embodiment of the present application.
  • FIG. 9 is the second schematic diagram of the distribution of cyclic shift values on the comb teeth provided by the embodiment of the present application.
  • Figure 10 is the second schematic diagram of the comb teeth occupied by the SRS provided by the embodiment of the present application.
  • Figure 11 is the third schematic diagram of the comb teeth occupied by the SRS provided by the embodiment of the present application.
  • Figure 12 is the third schematic diagram of the distribution of cyclic shift values on the comb teeth provided by the embodiment of the present application.
  • FIG. 13 is the fourth schematic diagram of the distribution of cyclic shift values on the comb teeth provided by the embodiment of the present application.
  • FIG. 14 is one of the schematic diagrams of the communication device provided by the embodiment of the present application.
  • FIG. 15 is the second schematic diagram of the communication device provided by the embodiment of the present application.
  • the technical solution of the embodiment of the present application can be applied to various communication systems, such as: global system of mobile communication (global system of mobile communication, GSM) system, code division multiple access (code division multiple access, CDMA) system, broadband code division multiple access (wideband code division multiple access, WCDMA) system, general packet radio service (general packet radio service, GPRS), 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), universal mobile communication system (univeRMal mobile telecommunications system, UMTS), global interconnection microwave access (worldwide interoperability for microwave access, WiMAX) communication system, fifth generation (5th generation, 5G) Mobile communication system or new radio (new radio, NR), etc.
  • the 5G mobile communication system described in this application includes non-standalone (non-standalone, NSA) 5G mobile communication system and/or independent network (standalone, SA ) 5G mobile communication system.
  • the technical solution provided by this application can also be applied to future communication systems, such as the sixth generation mobile communication system.
  • the communication system may also be a public land mobile network (PLMN) network, a device-to-device (D2D) network, a machine-to-machine (M2M) network, an IoT network or other networks .
  • PLMN public land mobile network
  • D2D device-to-device
  • M2M machine-to-machine
  • IoT IoT network
  • the architecture of the communication system applied in the embodiment of the present application may be shown in FIG. 1 .
  • the communication system includes a radio access network 100 and a core network 200 .
  • the communication system may also include the Internet 300 .
  • the radio access network 100 may include at least one network device, such as 110a and 110b in FIG. 1 , and may also include at least one terminal device, such as 120a-120j in FIG. 1 .
  • 110a is a base station
  • 110b is a micro station
  • 120a, 120e, 120f and 120j are mobile phones
  • 120b is a car
  • 120c is a fuel dispenser
  • 120d is a home access point (HAP) arranged indoors or outdoors
  • 120g is a laptop
  • 120h is a printer
  • 120i is a drone.
  • the same terminal device or network device may provide different functions in different application scenarios.
  • the mobile phones in Figure 1 include 120a, 120e, 120f and 120j.
  • the mobile phone 120a can connect to the base station 110a, connect to the car 120b, communicate directly with the mobile phone 120e, and access the HAP.
  • the mobile phone 120b can access the HAP and communicate with the mobile phone 120a.
  • the mobile phone 120f can be connected to the micro station 110b, connected to the laptop 120g, connected to the printer 120h
  • the mobile phone 120j can control the drone 120i.
  • the terminal device is connected to the network device, and the network device is connected to the core network.
  • Core network equipment and network equipment can be independent and different physical equipment, or the functions of the core network equipment and the logical functions of the network equipment can be integrated on the same physical equipment, or a physical equipment can integrate part of the core network equipment.
  • device functions and functions of some network devices. Terminal devices and network devices may be connected to each other in a wired or wireless manner.
  • FIG. 1 is only a schematic diagram.
  • the communication system may also include other devices, such as wireless relay devices and wireless backhaul devices, which are not shown in FIG. 1 .
  • Network equipment also known as wireless access network equipment, can be a base station (base station), evolved base station (evolved NodeB, eNodeB), transmission reception point (transmission reception point, TRP), fifth generation (5th generation, 5G ) the next generation NodeB (gNB) in the mobile communication system, the base station in the sixth generation (6G) mobile communication system, the base station in the future mobile communication system or the access node in the WiFi system, etc.; It may also be a module or unit that completes some functions of the base station, for example, it may be a centralized unit (central unit, CU) or a distributed unit (distributed unit, DU).
  • the CU here completes the functions of the radio resource control protocol and the packet data convergence protocol (PDCP) of the base station, and also completes the function of the service data adaptation protocol (SDAP); the DU completes the functions of the base station
  • the functions of the wireless link control layer and the medium access control (medium access control, MAC) layer can also complete the functions of part or all of the physical layer.
  • 3rd generation partnership project, 3GPP third generation partnership project
  • the network device may be a macro base station (such as 110a in Figure 1), a micro base station or an indoor station (such as 110b in Figure 1), or a relay node or a donor node.
  • the embodiment of the present application does not limit the specific technology and specific device form adopted by the network device.
  • a terminal device may also be called a terminal, a user equipment (user equipment, UE), a mobile station, a mobile terminal, and the like.
  • Terminal devices can be widely used in various scenarios, such as device-to-device (D2D), vehicle-to-everything (V2X) communication, machine-type communication (MTC), Internet of Things (internet of things, IOT), virtual reality, augmented reality, industrial control, automatic driving, telemedicine, smart grid, smart furniture, smart office, smart wear, smart transportation, smart city, etc.
  • Terminal devices can be mobile phones, tablet computers, computers with wireless transceiver functions, wearable devices, vehicles, drones, helicopters, airplanes, ships, robots, robotic arms, smart home devices, etc.
  • the embodiment of the present application does not limit the specific technology and specific device form adopted by the terminal device.
  • Network equipment and terminal equipment can be fixed or mobile.
  • Network equipment and terminal equipment can be deployed on land, including indoors or outdoors, hand-held or vehicle-mounted; they can also be deployed on water; they can also be deployed on aircraft, balloons and artificial satellites in the air.
  • the embodiments of the present application do not limit the application scenarios of the network device and the terminal device.
  • the helicopter or UAV 120i in FIG. 1 may be configured as a mobile network equipment.
  • the terminal device 120i is a network device; but for the network device 110a, 120i is a terminal device, that is, communication between 110a and 120i is performed through a wireless air interface protocol.
  • communication between 110a and 120i may also be performed through an interface protocol between network devices.
  • 120i is also a network device. Therefore, both network equipment and terminal equipment can be collectively referred to as communication devices, 110a and 110b in FIG. 1 can be referred to as communication devices with network device functions, and 120a-120j in FIG. 1 can be referred to as communication devices with terminal device functions .
  • Communication between network devices and terminal devices, between network devices and network devices, between terminal devices and terminal devices can be performed through licensed spectrum, or through license-free spectrum, or through licensed spectrum and license-free spectrum at the same time
  • Communication can be performed through a frequency spectrum below 6 gigahertz (GHz), or can be performed through a frequency spectrum above 6 GHz, and can also be performed using a frequency spectrum below 6 GHz and a frequency spectrum above 6 GHz at the same time.
  • GHz gigahertz
  • the embodiments of the present application do not limit the frequency spectrum resources used for wireless communication.
  • the functions of the network device may also be performed by modules (such as chips) in the network device, or may be performed by a control subsystem including the functions of the network device.
  • the control subsystem including network device functions may be the control center in the above application scenarios such as smart grid, industrial control, intelligent transportation, and smart city.
  • the functions of the terminal equipment may also be performed by a module (such as a chip or a modem) in the terminal equipment, or may be performed by a device including the functions of the terminal equipment.
  • the network device sends downlink signals or downlink information to the terminal device, and the downlink information is carried on the downlink channel; the terminal device sends uplink signals or uplink information to the network device, and the uplink information is carried on the uplink channel.
  • the terminal device needs to establish a wireless connection with the cell controlled by the network device.
  • a cell with which a terminal device has established a wireless connection is called the serving cell of the terminal device.
  • the time-domain symbols may be Orthogonal Frequency Division Multiplexing (OFDM) symbols, or Discrete Fourier Transform-spread-OFDM (Discrete Fourier Transform-spread-OFDM) symbols. , DFT-s-OFDM) symbols. Unless otherwise specified, the symbols in the embodiments of the present application refer to time-domain symbols.
  • OFDM Orthogonal Frequency Division Multiplexing
  • Discrete Fourier Transform-spread-OFDM Discrete Fourier Transform-spread-OFDM
  • DFT-s-OFDM DFT-s-OFDM
  • the communication system may be in a single carrier scenario or a carrier aggregation scenario (carrier aggregation, CA), and the network device and the terminal device communicate through a wireless network.
  • One or more cells may be included under the network device.
  • the communication system can also be in the scenario of dual connectivity (dual connectivity, DC) or coordinated multipoint transmission (coordinated multipoint transmission/reception, CoMP), the communication system includes network device a, network device b and terminal Device, network device a is the network device when the terminal device initially accesses, responsible for radio resource control (radio resource control, RRC) communication with the terminal device, network device b is added during RRC reconfiguration, and is used to provide Additional wireless resources.
  • RRC radio resource control
  • a terminal device configured with carrier aggregation is connected to network device a and network device b.
  • the link between network device a and terminal device may be called the first link, and the link between network device b and terminal device may be Call it the second link.
  • the above-mentioned communication system applicable to this application is only an example, and the communication system applicable to this application is not limited thereto.
  • the number of network devices and terminal devices included in the communication system can also be other numbers, or the scenario of using a single network device , multi-carrier aggregation scenarios, dual link scenarios or D2D communication scenarios, CoMP scenarios, etc.
  • the CoMP can be one or more scenarios in non-coherent joint transmission (NCJT), coherent joint transmission (CJT), joint transmission (JT), etc.
  • comb teeth, comb teeth are a plurality of resource elements (resource elements, REs) at equal intervals on one symbol, where one RE occupies one symbol in the time domain and one subcarrier in the frequency domain , that is, one subcarrier in one symbol in the time domain is one RE.
  • resource elements resource elements, REs
  • terminal equipment can send reference signals to network equipment, such as sending DMRS, SRS, etc. to network equipment, so that network equipment can perform operations such as estimating channel quality based on the reference signal; network equipment can also send reference signals to terminal equipment , such as sending a channel-state information reference signal (channel-state information reference signal, CSI-RS) to the terminal device, etc., for the terminal device to estimate the channel quality and report the channel quality information back to the network device.
  • network equipment can send reference signals to network equipment, such as sending DMRS, SRS, etc. to network equipment, so that network equipment can perform operations such as estimating channel quality based on the reference signal
  • network equipment can also send reference signals to terminal equipment , such as sending a channel-state information reference signal (channel-state information reference signal, CSI-RS) to the terminal device, etc., for the terminal device to estimate the channel quality and report the channel quality information back to the network device.
  • CSI-RS channel-state information reference signal
  • a reference signal sequence can be a sequence generated by the base sequence.
  • the SRS sequence r u,v (n) of length M can be generated by the base sequence of length M Generated by the following formula:
  • N ZC is the length of the ZC sequence; ⁇ is the cyclic shift, which is configured by the network device; q is the root index (root index), which is determined according to u and v; j is the imaginary unit.
  • base sequence It may be a sequence generated based on the ZC sequence. In the above example, the base sequence is obtained after cyclic expansion of the ZC sequence, otherwise. The base sequence can also be generated by other methods, such as the ZC sequence itself, or a sequence generated by the ZC sequence through cyclic shift.
  • the cyclic shift is configured by the network device.
  • different SRS sequences can be obtained by using different cyclic shifts. If there are two cyclic shifts, when their values ⁇ 1 and ⁇ 2 satisfy ⁇ 1 mod 2 ⁇ 2 mod 2 ⁇ , the sequence x 1 (m) obtained from the base sequence r(m) and ⁇ 1 , and The sequence x 2 (m) obtained from the base sequence r(m) and ⁇ 2 is mutually orthogonal, that is, the cross-correlation coefficient is zero.
  • the cross-correlation coefficient is defined as:
  • the SRS sequences obtained based on the same base sequence and different cyclic shifts can be allocated to different terminal devices, and these terminal devices can send these SRS sequences on the same time-frequency resources.
  • these SRS sequences will not cause interference between terminal devices.
  • one reference signal resource includes one or more antenna ports, and each antenna port may correspond to a sequence, and each sequence may be generated according to the method in each embodiment of the present application, and then generated including multiple Reference signal at the antenna port.
  • An SRS resource includes antenna ports, corresponding to sequence.
  • the network device can issue SRS resource configuration information to the terminal device through RRC signaling, etc.
  • the SRS resource configuration information includes the number of antenna ports, the transmission comb value (transmissionComb), the comb tooth offset Set (combOffset) and other information.
  • the SRS adopts a comb-shaped (comb) transmission manner in the frequency domain, that is, for a single terminal device, the SRS of the antenna port is transmitted for every K TC subcarriers in the frequency domain.
  • the combOffset can also be determined.
  • the combOffset is one of ⁇ 0, 1 ⁇
  • K TC 4
  • combOffset is one of ⁇ 0, 1, 2, 3 ⁇ .
  • a rectangular grid in Figure 3A represents one RE, and when the transmission comb value K TC is 2, multiple REs are divided into comb 0 numbered 0 (comb 0 is defined by all combs in Figure 3A RE numbered 0) and comb tooth 1 numbered 1 (comb tooth 1 is composed of all REs numbered 1 in Figure 3A).
  • the terminal device sends SRS on comb tooth 0, that is, sends SRS on all REs numbered 0 in FIG. 3A .
  • a rectangular grid in Figure 3B represents one RE, and the transmission comb tooth value is 4, and multiple REs are divided into comb tooth 0 numbered 0 (comb tooth 0 is represented by all numbers in Figure 3B 0), comb tooth 1 numbered 1 (comb tooth 1 is composed of all REs numbered 1 in Figure 3B), comb tooth 2 numbered 2 (comb tooth 2 is composed of all RE numbers numbered 2 in Figure 3B REs) and comb teeth 3 numbered 3 (comb teeth 3 consist of all REs numbered 3 in Figure 3B).
  • the terminal device sends SRS on comb tooth 1, that is, the terminal device sends SRS on all REs numbered 1 in FIG. 3B .
  • a rectangular grid in Figure 4 represents one RE, and when the transmission comb value is 4, multiple REs are divided into comb 0 numbered 0 (comb 0 is defined by All REs numbered 0), comb 1 numbered 1 (comb 1 is composed of all REs numbered 1 in Figure 4), comb 2 numbered 2 (comb 2 is composed of all numbers in Figure 4 2) and comb tooth 3 numbered 3 (comb tooth 3 is composed of all REs numbered 3 in Figure 4). If the comb tooth offset configured for terminal device 1 is 0, then terminal device 1 sends SRS on comb tooth 0, and if the comb tooth offset configured for terminal device 2 is 2, then terminal device 2 sends SRS on comb tooth 2.
  • the SRSs of different terminal devices may use the same time-frequency resource, and at this time, different antenna ports of the SRSs of different terminal devices are multiplexed through different cyclic shifts (cs). Different antenna ports of the SRS of a terminal device may also use the same time-frequency resource, and at this time, different antenna ports of the SRS are multiplexed through different cyclic shifts.
  • the protocol specifies the maximum number of cyclic shifts supported by different transmission comb values (also called comb values). The corresponding relationship between the specific transmission comb values and the supported maximum cyclic shifts is shown in Table 1 below. Among them, K TC represents the transmission comb value, Indicates the maximum number of cyclic shifts. In addition, it should be understood that a cyclic shift can also be called a cyclic shift value.
  • SRS generated according to 8 cyclic shifts can be sent at most on the RE occupied by the SRS, that is to say , 8 SRSs can be sent on one comb (such as the comb composed of all REs numbered 0 in Figure 3A), and these 8 SRSs are orthogonally multiplexed on the same comb through 8 cyclic shift values, That is, on the same time-frequency resource; on the comb corresponding to the transmission comb value of 4 and the comb bias of 1, that is, when the transmission comb value is 4 and the comb bias is 1, the SRS occupies
  • the SRS generated according to 12 cyclic shifts can be sent on the RE at most, that is to say, 12 SRSs can be sent on one comb (as shown on the comb composed of all REs numbered 1 in Figure 3B).
  • the SRS is orthogonally multiplexed on the same
  • a i represents the cyclic shift i, which means that the number is i cyclic shift
  • the current cyclic shift allocation method is to allocate equal-spaced cyclic shifts to different antenna ports of the same terminal device.
  • the allocation of equal-spaced cyclic shifts to different antenna ports of a terminal device can be understood as: if a terminal device needs to allocate The number of antenna ports for cyclic shift is X, and the maximum number of cyclic shifts is from The X cyclic shifts allocated to the X antenna ports in the cyclic shifts are arranged in ascending order, and the absolute values of the differences between any two adjacent cyclic shifts are equal and equal to The product of the ratio of X to P, where P is The cyclic shifts are arranged in ascending order, and the absolute value of the difference between any two adjacent cyclic shifts is The absolute value of the difference between any number of adjacent cyclic shifts in a cyclic shift can also be called the cyclic shift interval.
  • the value of cyclic shift 0 is 0, the value of cyclic shift 1 is ⁇ /3, the value of cyclic shift 2 is 2 ⁇ /3, the value of cyclic shift 3 is ⁇ , and the value of cyclic shift 4
  • the value is 4 ⁇ /3, and the value of cyclic shift 5 is 5 ⁇ /3 as an example
  • P is ⁇ /3
  • the product of the ratio to X and P is 2 ⁇ /3, then the 3 cyclic shifts assigned to the 3 antenna ports can be cyclic shift 0, cyclic shift 2, and cyclic shift 4 in ascending order, and can also be
  • the cyclic shift 1, the cyclic shift 3 and the cyclic shift 5 satisfy that the absolute value of the difference between any two adjacent cyclic shifts is 2 ⁇ /3.
  • the existing method of allocating cyclic shifts at equal intervals cannot meet requirements, which affects the transmission of reference signals by terminal equipment.
  • beam management SRS, non-codebook SRS, antenna switching SRS and other types of SRS can support up to 4 antenna ports, at the maximum cyclic shift value In the case of 6, the 4 equally spaced cyclic shifts allocated for 4 antenna ports cannot be satisfied, which will affect the transmission of the reference signal by the terminal equipment. Therefore, how to allocate cyclic shifts to the terminal equipment is a technical problem that needs to be solved urgently at present when the cyclic shifts at equal intervals cannot be allocated to the terminal equipment.
  • the communication method provided by the embodiment of the present application can support allocating cyclic shifts to antenna ports when the existing method of allocating cyclic shifts at equal intervals cannot allocate cyclic shifts to antenna ports, and supports terminal equipment to allocate reference signals sent to improve communication performance.
  • the reference signal can be SRS, such as beam management SRS, non-codebook SRS, antenna switching SRS, etc., and can also be other reference signals, such as DMRS, etc.
  • SRS beam management SRS
  • non-codebook SRS non-codebook SRS
  • DMRS other reference signals
  • the reference signal is an SRS as an example
  • the reference signal resource is also an SRS resource as an example. That is, all the SRSs described later can be replaced by reference signals.
  • Fig. 5 is a schematic diagram of a communication method provided by an embodiment of the present application, the method includes:
  • the terminal device determines the number X of antenna ports and the maximum number of cyclic shifts of the SRS The X, the is a positive integer. where in Figure 5 Expressed in K.
  • the network device may indicate the SRS resource configuration to the terminal device by sending the first signaling to the terminal device.
  • the first signaling may be RRC signaling, media access control layer (media access control, MAC) control element (control element, CE) signaling, and the like.
  • the SRS resource configuration may include the number X of antenna ports of the SRS, the transmission comb value K TC, etc., and may also include information such as the time domain position of the SRS, the frequency domain position, the port number of the antenna port, and the comb tooth offset.
  • the terminal device After the terminal device receives the first signaling from the network device, it can determine the number of antenna ports X of the SRS, and according to the transmission comb value K TC , and the corresponding relationship between the transmission comb value and the maximum cyclic shift number (as shown in Table 1), determine the maximum cyclic shift number of SRS
  • the network device indicates to the terminal device that the number of SRS antenna ports X is 4 and the transmission comb value K TC is 8.
  • the corresponding relationship of the number of bits can determine the maximum cyclic shift number of SRS for 6.
  • the terminal device sends an SRS on the same time-frequency resource, and the network device receives the SRS, and the SRS is generated according to X cyclic shifts, wherein the X cannot be obtained by the divisible, the X cyclic shifts are The cyclic shifts with different values and unequal intervals among the cyclic shifts.
  • Sending SRSs including X antenna ports on the same time-frequency resource means that the SRSs of X antenna ports occupy the same REs.
  • the time-frequency resources can be multiple consecutive REs on the same symbol or multiple REs at equal intervals on the same symbol, and multiple REs at equal intervals on the same symbol can also be called comb teeth.
  • the terminal device may determine the comb used to send the SRS according to the SRS resource configuration indicated by the network device.
  • the comb teeth i.e., frequency resources
  • Figure 6 the comb teeth (i.e., frequency resources) for transmitting SRSs containing X antenna ports are shown in Figure 6, where one The rectangular grid represents one RE, one RE is a symbol in the time domain, and one subcarrier in the frequency domain, and multiple REs are divided into comb 0 numbered 0 (comb 0 is composed of all numbers in Figure 6 0), comb tooth 1 numbered 1 (comb tooth 1 is composed of all REs numbered 1 in Figure 6), comb tooth 2 numbered 2 (comb tooth 2 is composed of all RE numbers numbered 2 in Figure 6 Composed of REs) and comb 3 numbered 3 (comb 3 is composed of all REs numbered 3 in FIG.
  • cyclic shift 1 when the maximum number of cyclic shifts is , for the maximum number of cyclic shifts corresponding to cyclic shifts, that is, cyclic shift 0, cyclic shift 1, cyclic shift 2, ... cyclic shift It can be determined as follows:
  • ⁇ i represents the cyclic shift i, that is, the cyclic shift i numbered i or The i+1th cyclic shift in the cyclic shifts, Indicates the number of cyclic shift i, is the maximum number of cyclic shifts f(i) is a variable function, where f(i) can be equal to i, or in,
  • the value of cyclic shift 2 is 2 ⁇ /3
  • the value of cyclic shift 3 is ⁇
  • the value of cyclic shift 4 is 4 ⁇ /3
  • the value of cyclic shift 5 is 5 ⁇ /3.
  • Cyclic shift 0, cyclic shift 1, cyclic shift 2, cyclic shift 3, cyclic shift 4, and cyclic shift 5 are 6 cyclic shifts sorted from small to large with intervals of ⁇ /3.
  • X cyclic shifts are assigned to X antenna ports, and the X cyclic shifts are arranged from small to large, and the absolute value of the difference between any two adjacent cyclic shifts is equal and equal to and P, where P is The cyclic shifts are arranged in ascending order, and the absolute value of the difference between any two adjacent cyclic shifts.
  • the cyclic shifts are allocated to the antenna ports.
  • X antenna ports can be assigned The X cyclic shifts with different values and unequal intervals in the cyclic shifts, that is, they can be in cyclic shifts assigns any X number of cyclic shifts with different values to the X antenna ports.
  • the value of cyclic shift 0 among the 6 cyclic shifts is 0, the value of cyclic shift 1 is ⁇ /3, the value of cyclic shift 2 is 2 ⁇ /3, the value of cyclic shift 3 is ⁇ , and the value of cyclic shift 3 is ⁇ .
  • the value of the shift 4 is 4 ⁇ /3, and the value of the cyclic shift 5 is 5 ⁇ /3 as an example, then it can be 4 antenna ports of the terminal device, in 6 cyclic shifts (cyclic shift 0-cyclic shift 5 ) to assign any 4 cyclic shifts with different values, such as assigning cyclic shift 0, cyclic shift 1, cyclic shift 3, and cyclic shift 4 to 4 antenna ports.
  • X cyclic shifts with different values and no equal intervals may be indicated by the network device to the terminal device.
  • the network device may carry indication information in the first signaling indicating SRS resource configuration, which is used to indicate the terminal equipment X cyclic shifts with different values and unequal intervals among the cyclic shifts.
  • the X cyclic shifts in the N cyclic shifts can be indicated by a bitmap (bitmap) from the network device, which is used to indicate The distribution of X cyclic shifts in cyclic shifts.
  • bitmap bitmap
  • the length (number of bits) of the bitmap can be compared with the maximum number of cyclic shifts equal
  • the first bit of the bitmap indicates Whether the first cyclic shift (that is, cyclic shift 0) in the cyclic shifts is available
  • the second bit of the bitmap indicates Whether the second cyclic shift (that is, cyclic shift 1) in the cyclic shifts is available
  • 1 may be used to indicate that the cyclic shift is available
  • 0 may be used to indicate that the cyclic shift is not available.
  • X is 4
  • the bitmap is "011011" as an example, it indicates that X cyclic shifts are cyclic shift 1, cyclic shift 2, cyclic shift 4, and cyclic shift 5 among the cyclic shifts.
  • the X cyclic shifts in the N cyclic shifts can also be indicated by an index number from the network device, which is used to indicate one of a plurality of cyclic shift sets, wherein each cyclic shift set is represented by The set of cyclic shifts indicated by the index number consists of X cyclic shifts.
  • network devices and terminal devices can pre-set different maximum cyclic shift numbers Respectively pre-define the cyclic shift set index table, or the network device for different maximum cyclic shift After the cyclic shift set index table is configured, it is sent to the terminal device through broadcast or multicast.
  • Each entry in the cyclic shift set index table corresponds to a preset cyclic shift set, and each entry corresponds to an index number. example, when When it is 6, the cyclic shift set index table can be shown in Table 2 below:
  • X is 4, and the index number is 3.
  • the index number 3 indicates that X cyclic shifts are cyclic shift 1, cyclic shift 2, cyclic shift 4, and cyclic shift 5 among the cyclic shifts.
  • the cyclic shifts satisfy the values of different and equal intervals, which can be limited to X cyclic shifts allocated to X antenna ports, as Rotate ⁇ Rotate 0, Rotate 1, ..., Rotate ⁇ remove ⁇ circular shift i, cyclic shift cyclic shift ..., circular shift ⁇ outside the cyclic shift. It is also possible to follow this qualification from Select X cyclic shifts allocated to X antenna ports among cyclic shifts to guarantee the remaining The cyclic shifts satisfy different and equally spaced values. where i is greater than or equal to 0 and less than any integer of .
  • the above technical solution of the embodiment of the present application can be understood as: determining the number X of antenna ports and the maximum number of cyclic shifts of the reference signal The X, the is a positive integer;
  • the reference signal is generated according to X cyclic shifts, wherein the X cannot be determined by the divisible, the X cyclic shifts are The cyclic shifts with different values and unequal intervals in the cyclic shifts, the cyclic shift is The cyclic shifts with different median values and equal intervals.
  • the X cyclic shifts and the The X cyclic shifts may be cyclic shifts allocated to different terminal devices, for example, the X cyclic shifts are allocated to terminal device 1, the cyclic shifts are assigned to terminal device 2.
  • X is 4,
  • the value of cyclic shift 0 is 0, the value of cyclic shift 1 is ⁇ /3, the value of cyclic shift 2 is 2 ⁇ /3, the value of cyclic shift 3 is ⁇ , and the value of cyclic shift 4
  • the value is 4 ⁇ /3, and the value of cyclic shift 5 is 5 ⁇ /3 as an example, then
  • the absolute value P of the difference between any number of adjacent cyclic shifts in a cyclic shift is equal to ⁇ /3, 0 ⁇ i ⁇ 3, i can be 0, 1, 2, when i is 0,
  • X cyclic shifts include Cyclic shift 1, cyclic shift 2, cyclic shift 4, cyclic shift 5 in cyclic shifts, the absolute value of the difference between the unused 2 cyclic shifts (cyclic shift 0 and cyclic shift 3) ⁇ is equal to the product of 6/2 and ⁇ /3, which satisfies the condition that the values are different and equally spaced, has good orthogonality, and can be allocated by network
  • X cyclic shifts include Cyclic shift 0, cyclic shift 2, cyclic shift 3, cyclic shift 5 in cyclic shifts, the absolute value of the difference between the unused 2 cyclic shifts (cyclic shift 1 and cyclic shift 4) ⁇ is equal to the product of 6/2 and ⁇ /3, which satisfies the condition that the values are different and equally spaced, has good orthogonality, and can be allocated by network equipment to other terminal equipment for use.
  • X cyclic shifts include Cyclic shift 0, cyclic shift 1, cyclic shift 3, cyclic shift 4 in cyclic shifts, the absolute value of the difference between the unused 2 cyclic shifts (cyclic shift 2 and cyclic shift 5) ⁇ is equal to the product of 6/2 and ⁇ /3, which satisfies the condition that the values are different and equally spaced, has good orthogonality, and can be allocated by network equipment to other terminal equipment for use.
  • the network device may also indicate to the terminal device the i X cyclic shifts in cyclic shifts.
  • the bitmap, index number, i, etc. of the X cyclic shifts among the cyclic shifts may be indicated by the first signaling indicating the SRS resource sent by the network device to the terminal device, or may be indicated by other signaling.
  • the terminal device can generate X SRS sequences according to the base sequence and the X cyclic shifts, and generate and send SRSs according to the X SRS sequences.
  • the X cyclic shifts allocated to X antenna ports are cyclic shift 1 " ⁇ /3", cyclic shift 2 "2 ⁇ /3", cyclic shift 4 "4 ⁇ /3", cyclic shift
  • the terminal device can shift 1 " ⁇ /3", cyclic shift 2 "2 ⁇ /3", cyclic shift 4 "4 ⁇ /3", cyclic shift 5 "5 ⁇ /3” generates 4 SRS sequences, each of the 4 antenna ports corresponds to a SRS sequence, and by mapping the SRS sequence corresponding to each antenna port to the corresponding subcarrier (instant frequency resource), the content of SRS post-transmission for 4 antenna ports.
  • the network device performs channel estimation according to the SRS and the X SRS sequences.
  • the X SRS sequences are generated according to X cyclic shifts, wherein, the X cannot be divisible, the is the maximum cyclic shift number of the SRS, and the X cyclic shifts are The cyclic shifts with different values and unequal intervals among the cyclic shifts.
  • the SRS received by the network device is a deformed SRS.
  • the network device can determine the original X SRS sequences based on the X cyclic shifts indicated to the terminal device. Based on the original X SRS sequences and the deformed SRS obtained through channel transmission, the network device can determine the network device and The channel between terminal devices is estimated.
  • the above method embodiments mainly start from the point of view of cyclic shifts with different X values and unequal intervals indicated to the terminal device, and solve the problem that the existing equal interval
  • the way of allocating cyclic shifts cannot meet the requirements, which affects the problem that the terminal equipment sends the SRS.
  • Fig. 7 is a schematic diagram of another communication method provided by the embodiment of the present application, the method includes:
  • the terminal device determines the number M of comb teeth used for sending the SRS, where M is an integer greater than 1.
  • the network device when the network device configures SRS resources for the terminal device, the network device will not indicate to the terminal device the number M of comb teeth used to send SRS, and the terminal device sends on one comb tooth by default. SRS.
  • a rectangular grid in Figure 8 represents one RE, and when the transmission comb value K TC is 4, multiple REs are divided into comb 0 numbered 0 (comb 0 is represented by Figure 8 Comb tooth 1 with number 1 (comb tooth 1 is composed of all RE with number 1 in Figure 8), comb tooth 2 with number 2 (comb tooth 2 is composed of all REs with number 1 in Figure 8 RE numbered 2) and comb tooth 3 numbered 3 (comb tooth 3 is composed of all REs numbered 3 in Figure 8).
  • the terminal device sends SRS on comb 0; if the comb offset is 1, the terminal transmits SRS on comb 1; if the comb offset is 2, the terminal sends SRS on comb 1; SRS is sent on comb tooth 2. If the comb tooth offset is 3, the terminal device sends SRS on comb tooth 3. In Figure 8, the comb tooth offset is 0, and the terminal device sends SRS on comb tooth 0 as an example. Identifies the comb tooth used by the terminal device to send SRS.
  • the number of antenna ports X of the SRS cannot be shifted by the maximum number of cyclic shifts on a comb When divisible, that is When , the method of allocating cyclic shifts at equal intervals cannot be used in Among the cyclic shifts, X cyclic shifts are assigned to X antenna ports to meet the arrangement from small to large, and the absolute value of the difference between any two adjacent cyclic shifts is equal and equal to The product of the ratio of X to P, where P is The cyclic shifts are arranged in ascending order, and the absolute value of the difference between any two adjacent cyclic shifts.
  • the maximum number of cyclic shifts on a comb It can also be called the maximum cyclic shift number of SRS It can be determined according to the transmission comb value K TC of the SRS, and the corresponding relationship between the transmission comb value and the maximum cyclic shift number (as shown in Table 1), for The manner of determining the value of a cyclic shift may refer to the implementation in the method embodiment shown in FIG. 5 , and details are not repeated here.
  • each comb can only correspond to a part of the antenna port of the SRS, so that each comb can be allocated to the antenna ports of the terminal device with equal intervals of cyclic shift.
  • cyclic shift 0 is 0, the value of cyclic shift 1 is ⁇ /6, the value of cyclic shift 2 is ⁇ /3, the value of cyclic shift 3 is 3 ⁇ /6, and the value of cyclic shift
  • the value of 4 is 2 ⁇ /3, ..., the value of cyclic shift 10 is 11 ⁇ /6, and the value of cyclic shift 11 is 2 ⁇ .
  • comb tooth 0 can be sent according to 4 cyclic shifts (corresponding to 4 antennas port) and SRS generated by 4 cyclic shifts (corresponding to 4 antenna ports) are also sent on comb 1, then both comb 0 and comb 1 correspond to 4 antenna ports, and the maximum cyclic shift Divisible by 4, the 4 antenna ports corresponding to each comb can be allocated
  • the 4 values in the cyclic shifts are different and equally spaced cyclic shifts.
  • the embodiment of the present application can start from the perspective of flexibly configuring the number of comb teeth (that is, the number of comb teeth is not limited to 1). Implements assigning cyclic shifts to antenna ports.
  • the number M of comb teeth of the SRS may be indicated by the network device to the terminal device through SRS resource configuration or the like.
  • the network device can be based on the number of antenna ports X of the SRS and the maximum number of cyclic shifts of the SRS The greatest common factor R of , determines the number M of comb teeth, such as setting M equal to the value of X divided by R, or the number M of comb teeth carried in the SRS resource configuration.
  • the network device may indicate to the terminal device by sending the first signaling to the terminal device.
  • the first signaling may be RRC signaling, MAC CE signaling and the like.
  • the SRS resource configuration may include the number X of antenna ports of the SRS, the transmission comb value K TC, etc., and may also include information such as the time domain position of the SRS, the frequency domain position, the port number of the antenna port, and the comb tooth offset.
  • the terminal device After the terminal device receives the first signaling from the network device, it can determine the number of antenna ports X of the SRS, and according to the transmission comb value K TC , and the corresponding relationship between the transmission comb value and the maximum cyclic shift number (as shown in Table 1), determine the maximum cyclic shift number of SRS
  • the terminal device can also be directly based on X and Determined by the greatest common factor R, such as making M equal to the value of X divided by R. For example, where X is 4, When it is 6, R is 2, and M is equal to 4/2, which is 2.
  • the M comb teeth may be continuous or equally spaced.
  • it is possible to pre-configure the M combs on the network device and the terminal device through a protocol to be continuous, that is, in the frequency domain, the M combs are adjacent and the numbers of the M combs are continuous; Protocols, etc. pre-configure M combs on network devices and terminal devices to be equally spaced, for example, pre-configure M combs with intervals of 1 or 2 combs between the two closest combs in the frequency domain.
  • the specific distribution of the M comb teeth can also be indicated by the network device through a bitmap or the like.
  • the network device can use the bitmap 1100 to indicate the occupancy of comb 0 and comb 1, comb 0 and comb 1 is continuous, and the bitmap 1010 can also indicate that comb tooth 0 and comb tooth 2 are occupied, and comb tooth 0 and comb tooth 2 are discontinuous.
  • the terminal device sends the SRS transmission including X antenna ports.
  • Combs i.e., frequency resources
  • combs for sending SRS are comb 1 and comb 2 .
  • the terminal device transmits the combs of the SRS (i.e. frequency resources) including X antenna ports.
  • FIG. 10 shows that the terminal device transmits the combs of the SRS (i.e. frequency resources) including X antenna ports.
  • one rectangular grid in Figure 10 and Figure 11 represents one RE, and multiple REs are divided into comb teeth 0 numbered 0 (comb tooth 0 is composed of all REs numbered 0 in Figure 10 or Figure 11), numbered Comb tooth 1 is 1 (comb tooth 1 is composed of all REs numbered 1 in Figure 10 or 11), comb tooth 2 is numbered 2 (comb tooth 2 is composed of all REs numbered 2 in Figure 10 or 11 Composition) and comb teeth 3 numbered 3 (comb teeth 3 are composed of all REs numbered 3 in Figure 10 or Figure 11).
  • the terminal device sends the SRS on M combs, and the network device receives the SRS on the M combs.
  • the implementation of determining the M comb teeth by the network device may refer to the implementation of determining the M comb teeth by the terminal device, and details are not repeated here.
  • the terminal device can send the SRS on the M combs, and the network device can receive the SRS on the M combs.
  • the number of antenna ports corresponding to each of the M combs may be the same or different. Taking the same number of antenna ports corresponding to each of the M combs as an example, each comb corresponds to R antenna ports, and the R cyclic shifts corresponding to the R antenna ports are The values in the R cyclic shifts are different and equally spaced cyclic shifts, and the SRS sent on the comb teeth is generated according to the R cyclic shifts.
  • the network device may indicate to the terminal device the R cyclic shifts corresponding to each comb among the M combs by using cyclic shift indication information or the like.
  • the R cyclic shifts corresponding to each comb tooth may be the same or different.
  • the R cyclic shifts corresponding to each comb tooth are the same, which can be understood as: for example, for one of the M comb teeth, the corresponding cyclic shifts are cyclic shift 0, cyclic shift 2, and cyclic shift 4, Then, for other comb teeth in the M comb teeth, the corresponding cyclic shifts are also cyclic shift 0, cyclic shift 2 and cyclic shift 4. Or, for other comb teeth among the M comb teeth, there are also three corresponding cyclic shifts, and the values of these three cyclic shifts are equal to cyclic shift 0, cyclic shift 2 and cyclic shift 4 respectively.
  • the R cyclic shifts corresponding to each of the M comb teeth can also be different and satisfy a predetermined relationship, for example: the R cyclic shifts corresponding to the comb teeth with the smallest number among the M comb teeth are cyclic shifts Shift A, cyclic shift B, ..., cyclic shift R, then the R cyclic shifts corresponding to the comb teeth with the second smallest number among the M comb teeth are cyclic shift A+1, cyclic shift B+1, ..., cyclic shift R+1, R cyclic shifts corresponding to other comb teeth, and so on.
  • the cyclic shift indication information may be included in the SRS resource configuration indicated by the first signaling and be indicated by the network device to the terminal device, or may be indicated by the network device to the terminal device through other signaling.
  • the network device can indicate M comb teeth as comb teeth 1 and comb teeth 2, and the maximum number of cyclic shifts for 6,
  • the value of cyclic shift 0 is 0, the value of cyclic shift 1 is ⁇ /3, the value of cyclic shift 2 is 2 ⁇ /3, the value of cyclic shift 3 is ⁇ , and the value of cyclic shift 4
  • the value is 4 ⁇ /3, and the value of cyclic shift 5 is 5 ⁇ /3.
  • the network device may indicate the first comb among the M combs, such as comb 1, through the indication information, and the interval between each of the M combs is predefined as 1. Therefore, the terminal The device can determine the M comb teeth as comb teeth 1 and comb teeth 2 according to the values of comb teeth 1 and M of the first comb teeth, and the interval between the M comb teeth. Alternatively, the network device may directly indicate the M comb teeth as comb tooth 1 and comb tooth 2 to the terminal device through indication information.
  • each of the M combs can correspond to 2 antenna ports.
  • the cyclic shift indication information may only indicate the first cyclic shift among the multiple cyclic shifts, and the predefined For the interval between multiple cyclic shifts, the terminal device can determine each cyclic shift on each comb tooth according to the first cyclic shift and the interval between cyclic shifts.
  • only the first cyclic shift among the multiple cyclic shifts may be indicated, and cyclic shifts at equal intervals between the multiple cyclic shifts are predefined, and the terminal device may set each comb according to the first cyclic shift The number of cyclic shifts on the teeth and the information distributed at equal intervals determine each cyclic shift interval on each comb tooth.
  • the network device indicates that the cyclic shift is 0 through the cyclic shift indication information, Among the cyclic shifts, R cyclic shifts with different satisfying values including cyclic shift 0 and equal intervals are cyclic shift 0 and cyclic shift 3, and the terminal device determines the R cycles corresponding to comb tooth 1 and comb tooth 2 The shifts are both cyclic shift 0 and cyclic shift 3.
  • the transmission comb value K TC of the SRS As 8, the number of antenna ports X as 4, and the determined number of combs M as 2 as an example.
  • the network device indicates that the M comb teeth are comb teeth 1 and comb teeth 2, and the maximum number of cyclic shifts for 6,
  • the value of cyclic shift 0 is 0, the value of cyclic shift 1 is ⁇ /3, the value of cyclic shift 2 is 2 ⁇ /3, the value of cyclic shift 3 is ⁇ , and the value of cyclic shift 4
  • the value is 4 ⁇ /3, and the value of cyclic shift 5 is 5 ⁇ /3.
  • X and The greatest common factor R of is still 2, and each of the M combs can correspond to 2 antenna ports.
  • the network device can indicate the cyclic shift 0 and the cyclic shift 1 through the cyclic shift indication information, and predefine the indication
  • the corresponding relationship between each cyclic shift and M comb teeth for example: the cyclic shift with the smallest number corresponds to the comb tooth with the smallest number among the M comb teeth, and the cyclic shift with the second smallest number corresponds to the second numbered comb tooth among the M comb teeth. Small comb teeth, comb teeth corresponding to other cyclic shifts, and so on.
  • the terminal device can determine the first cyclic shift corresponding to each comb tooth according to the cyclic shift indicated by the cyclic shift indication information, and further determine the cyclic shift on each comb tooth according to the first cyclic shift.
  • the determination method is the same as The above examples are the same and will not be repeated here.
  • R cyclic shifts with different satisfying values including cyclic shift 0 and equal intervals are cyclic shift 0 and cyclic shift 3
  • R cyclic shifts with different satisfying values including cyclic shift 1 and equal intervals are cyclic shift 1 and cyclic shift 4
  • the terminal device determines that the R cyclic shifts corresponding to comb tooth 1 are cyclic
  • the R cyclic shifts corresponding to shift 0, cyclic shift 3, and comb tooth 2 are cyclic shift 1 and cyclic shift 4.
  • the network device can indicate only one cyclic shift through the cyclic shift indication information, for example, only indicate the cyclic shift 0, and the interval between the first cyclic shifts corresponding to multiple comb teeth is predefined.
  • the terminal device can determine the first cyclic shift corresponding to the comb tooth with the smallest number among the M comb teeth according to the cyclic shift indicated by the cyclic shift indication information as the cyclic shift 0, and according to the predefined number of comb teeth The intervals between the corresponding first cyclic shifts determine the first cyclic shifts corresponding to other comb teeth, and then determine each cyclic shift on each comb tooth according to the first cyclic shifts.
  • M comb teeth are comb teeth 1 and comb teeth 2, the number R of cyclic shifts on each comb tooth is 3, and the maximum number of cyclic shifts for 12.
  • the interval between the first cyclic shifts between comb tooth 1 and comb tooth 2 is predefined as 2, and the cyclic shifts on each comb tooth are equally spaced.
  • the network device indicates cyclic shift 0 to the terminal device, then the terminal device can determine that the first cyclic shift corresponding to comb tooth 1 is cyclic shift 0, because the difference between the first cyclic shift between comb tooth 1 and comb tooth 2 The interval between them is 2, therefore, the cyclic shift corresponding to comb tooth 2 is cyclic shift 2.
  • each cyclic shift on comb tooth 1 is distributed at equal intervals, it can be determined that the cyclic shifts corresponding to comb tooth 1 are cyclic shift 0, cyclic shift 4 and Rotate by 8.
  • the cyclic shifts corresponding to the comb tooth 2 are cyclic shift 2, cyclic shift 6, and cyclic shift 10, respectively.
  • a rectangular grid in Figure 12 and Figure 13 represents one RE, and multiple REs are divided into comb teeth 0 numbered 0 (comb tooth 0 is composed of all REs numbered 0 in Figure 12 or Figure 13), numbered Comb tooth 1 is 1 (comb tooth 1 is composed of all REs numbered 1 in Figure 12 or 13), comb tooth 2 is numbered 2 (comb tooth 2 is composed of all REs numbered 2 in Figure 12 or 13 Composition) and comb tooth 3 numbered 3 (comb tooth 3 is composed of all RE numbered 3 in Figure 12 or Figure 13), comb tooth 4 numbered 4 (comb tooth 4 is composed of all numbered REs in Figure 12 or Figure 13 4), comb teeth 5 numbered 5 (comb teeth 5 consist of all REs numbered 5 in Figure 12 or Figure 13), comb teeth 6 numbered 6 (comb teeth 6 are formed by Figure 12 or All REs numbered 6 in 13) and comb teeth 7 numbered 7 (comb teeth 7 are composed of all REs numbered 7 in Figure 12 or Figure 13).
  • the terminal device After the terminal device determines the R cyclic shifts corresponding to each of the M combs, it can generate the R antennas corresponding to each comb according to the base sequence and the R cyclic shifts corresponding to each comb.
  • the port generates R SRS sequences. And for each comb, the corresponding R SRS sequences are mapped to the comb, and the SRS is sent, and the network device can receive the SRS sent by the terminal device on the corresponding comb.
  • the R antenna ports occupying the same comb among the X antenna ports are code-division orthogonal, and since the corresponding R cyclic shifts are equally spaced, better orthogonality can be ensured, while occupying different combs
  • the antenna ports of the teeth are frequency-division orthogonal, which can also ensure better orthogonality.
  • the network device and the terminal device include hardware structures and/or software modules corresponding to each function.
  • the present application can be implemented in the form of hardware or a combination of hardware and computer software with reference to the units and method steps of the examples described in the embodiments disclosed in the present application. Whether a certain function is executed by hardware or computer software drives the hardware depends on the specific application scenario and design constraints of the technical solution.
  • FIG. 14 and FIG. 15 are schematic structural diagrams of possible communication devices provided by the embodiments of the present application. These communication apparatuses may be used to realize the functions of the terminal device or the network device in the foregoing method embodiments, and thus also realize the beneficial effects of the foregoing method embodiments.
  • the communication device may be one of the terminal devices 120a-120j as shown in FIG. 1, or it may be the network device 110a or 110b as shown in FIG. 1, or it may be a terminal device Or a module (such as a chip) of a network device.
  • a communication device 1400 includes a processing unit 1410 and a transceiver unit 1420 .
  • the communication apparatus 1400 is configured to realize the functions of the terminal device or the network device in the method embodiment shown in FIG. 5 or FIG. 7 above.
  • a processing unit 1410 configured to determine the number X of antenna ports and the maximum number of cyclic shifts of the reference signal The X, the is a positive integer;
  • the transceiver unit 1420 is configured to send the reference signal on the same time-frequency resource, the reference signal is generated according to X cyclic shifts, wherein the X cannot be determined by the divisible, the X cyclic shifts are The cyclic shifts with different values and unequal intervals among the cyclic shifts.
  • the X cyclic shifts are the Rotate ⁇ Rotate 0, Rotate 1, ..., Rotate ⁇ remove ⁇ circular shift i, cyclic shift cyclic shift ..., cyclic shift ⁇ outside the cyclic shift, wherein, the cyclic shift 0, cyclic shift 1, ..., cyclic shift yes Circular shifts sorted from small to large and equally spaced, the i is greater than or equal to 0 and less than any integer of .
  • the X cyclic shifts include the One of the following cyclic shifts; cyclic shift 1, cyclic shift 2, cyclic shift 4, cyclic shift 5; or, cyclic shift 0, cyclic shift 2, cyclic shift 3, cyclic shift Bit 5; or, Rotate 0, Rotate 1, Rotate 3, Rotate 4.
  • the i is indicated by a network device.
  • the X cyclic shifts are indicated by indication information from the network device, where the indication information is used to indicate the The X cyclic shifts in the cyclic shifts are optional, and the indication information can be a bitmap or an index number; wherein, the bitmap is used to indicate the The distribution of the X cyclic shifts in the cyclic shifts; the index number is used to indicate one of a plurality of cyclic shift sets, wherein each cyclic shift set consists of The set of cyclic shifts indicated by the index number is composed of the X cyclic shifts.
  • the processing unit 1410 is further configured to generate X reference signal sequences according to the X cyclic shifts before the transceiver unit 1420 sends the reference signal on the same time-frequency resource ; Generate the reference signal according to the X reference signal sequences.
  • a processing unit 1410 configured to determine the number M of comb teeth used to send the reference signal, where M is determined by X and Determined by the greatest common factor R, the X is the number of antenna ports of the reference signal, the is the maximum cyclic shift number on a comb, the X, the is a positive integer, and the M is an integer greater than 1;
  • the transceiver unit 1420 is configured to send the reference signal on the M comb teeth.
  • the M consists of X and
  • the determination of the greatest common factor R includes: said M is equal to the value of said X divided by said R.
  • each of the M combs corresponds to R antenna ports, where the R antenna ports correspond to R cyclic shifts, and the R cyclic shifts are The values in the R cyclic shifts are different and equally spaced cyclic shifts, and the reference signal sent on the comb teeth is generated according to the R cyclic shifts.
  • the M comb teeth are continuous, or the M comb teeth are equally spaced.
  • a transceiver unit 1420 configured to receive a reference signal including X antenna ports on the same time-frequency resource
  • the processing unit 1410 is configured to perform channel estimation according to the reference signal and X reference signal sequences, the X reference signal sequences are generated according to X cyclic shifts, wherein the X cannot be divisible, the is the maximum cyclic shift number of the reference signal, and the X cyclic shifts are The cyclic shifts with different values and unequal intervals among the cyclic shifts.
  • the X cyclic shifts are the Rotate ⁇ Rotate 0, Rotate 1, ..., Rotate ⁇ remove ⁇ circular shift i, cyclic shift cyclic shift ..., circular shift ⁇ outside the cyclic shift, wherein, the cyclic shift 0, cyclic shift 1, ..., cyclic shift yes Circular shifts sorted from small to large and equally spaced, the i is greater than or equal to 0 and less than an integer of .
  • the X cyclic shifts include One of the following cyclic shifts; cyclic shift 1, cyclic shift 2, cyclic shift 4, cyclic shift 5; or, cyclic shift 0, cyclic shift 2, cyclic shift 3, cyclic shift Bit 5; or, Rotate 0, Rotate 1, Rotate 3, Rotate 4.
  • the transceiving unit 1420 is further configured to indicate the i to the terminal device sending the reference signal.
  • the X cyclic shifts are indicated by indication information, where the indication information is used to indicate the The X cyclic shifts in the cyclic shifts.
  • the indication information may be a bitmap or an index number; wherein, the bitmap is used to indicate the The distribution of the X cyclic shifts in the cyclic shifts; the index number is used to indicate one of a plurality of cyclic shift sets, wherein each cyclic shift set consists of The set of cyclic shifts indicated by the index number is composed of the X cyclic shifts.
  • the transceiving unit 1420 is further configured to send the indication information to the terminal device that sends the reference signal.
  • a processing unit 1410 configured to determine the number M of comb teeth, said M consisting of X and Determined by the greatest common factor R, the X is the number of antenna ports of the reference signal, the is the maximum cyclic shift number on a comb, the X, the is a positive integer, and the M is an integer greater than 1;
  • the transceiver unit 1420 is configured to receive the reference signal on the M comb teeth.
  • the M consists of X and
  • the determination of the greatest common factor R includes: said M is equal to the value of said X divided by said R.
  • each of the M combs corresponds to R antenna ports, where the R antenna ports correspond to R cyclic shifts, and the R cyclic shifts are The values in the R cyclic shifts are different and equally spaced cyclic shifts, and the reference signal sent on the comb teeth is generated according to the R cyclic shifts.
  • the M comb teeth are continuous, or the M comb teeth are equally spaced.
  • the transceiving unit 1420 is further configured to indicate the M to a terminal device sending the reference signal.
  • processing unit 1410 and the transceiver unit 1420 can be directly obtained by referring to the relevant descriptions in the method embodiment shown in FIG. 5 or FIG. 7 , and will not be repeated here.
  • a communication device 1500 includes a processor 1510 and an interface circuit 1520 .
  • the processor 1510 and the interface circuit 1520 are coupled to each other.
  • the interface circuit 1520 may be a transceiver or an input/output interface.
  • the communication device 1500 may further include a memory 1530 for storing instructions executed by the processor 1510 or storing input data required by the processor 1510 to execute the instructions or storing data generated by the processor 1510 after executing the instructions.
  • the processor 1510 is used to implement the functions of the processing unit 1410
  • the interface circuit 1520 is used to implement the functions of the transceiver unit 1420.
  • the terminal device chip implements the functions of the terminal device in the above method embodiment.
  • the terminal device chip receives information from other modules in the terminal device (such as radio frequency modules or antennas), and the information is sent to the terminal device by the network device; or, the terminal device chip sends information to other modules in the terminal device (such as radio frequency modules or antenna) to send information, which is sent by the terminal device to the network device.
  • the network equipment module implements the functions of the network equipment in the above method embodiments.
  • the network equipment module receives information from other modules in the network equipment (such as radio frequency modules or antennas), and the information is sent to the network equipment by the terminal equipment; or, the network equipment module sends information to other modules in the network equipment (such as radio frequency modules or antenna) to send information, which is sent by the network device to the terminal device.
  • the network device module here may be a baseband chip of the network device, or a DU or other modules, and the DU here may be a DU under an open radio access network (O-RAN) architecture.
  • OF-RAN open radio access network
  • processor in the embodiments of the present application may be a central processing unit (central processing unit, CPU), and may also be other general processors, digital signal processors (digital signal processor, DSP), application specific integrated circuits (application specific integrated circuit, ASIC), field programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof.
  • CPU central processing unit
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • a general-purpose processor can be a microprocessor, or any conventional processor.
  • the method steps in the embodiments of the present application may be implemented by means of hardware, or may be implemented by means of a processor executing software instructions.
  • Software instructions can be composed of corresponding software modules, and software modules can be stored in random access memory, flash memory, read-only memory, programmable read-only memory, erasable programmable read-only memory, electrically erasable programmable read-only Memory, registers, hard disk, removable hard disk, CD-ROM or any other form of storage medium known in the art.
  • An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium.
  • the storage medium may also be a component of the processor.
  • the processor and storage medium can be located in the ASIC.
  • the ASIC can be located in a network device or a terminal device. Certainly, the processor and the storage medium may also exist in the network device or the terminal device as discrete components.
  • 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 comprises one or more computer programs or instructions. When the computer program or instructions are loaded and executed on the computer, the processes or functions described in the embodiments of the present application are executed in whole or in part.
  • the computer may be a general purpose computer, a special purpose computer, a computer network, network equipment, user equipment, or other programmable devices.
  • the computer program or instructions can be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer program or instructions can be downloaded from a website, computer, A server or data center transmits to another website site, computer, server or data center by wired or wireless means.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer, or a data storage device such as a server or a data center integrating one or more available media.
  • the available medium may be a magnetic medium, such as a floppy disk, a hard disk, or a magnetic tape; it may also be an optical medium, such as a digital video disk; or it may be a semiconductor medium, such as a solid-state hard disk.
  • the computer readable storage medium may be a volatile or a nonvolatile storage medium, or may include both volatile and nonvolatile types of storage media.
  • information, signal (signal), message (message), and channel (channel) can sometimes be used interchangeably.
  • signal signal
  • message messages
  • channel channel
  • the character “/” generally indicates that the contextual objects are an “or” relationship; in the formulas of this application, the character “/” indicates that the contextual objects are a “division” Relationship.
  • “Including at least one of A, B and C” may mean: including A; including B; including C; including A and B; including A and C; including B and C; including A, B and C.

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

Abstract

La présente invention a trait au domaine technique des communications, et concerne un procédé et un appareil de communication, qui sont utilisés pour prendre en charge l'attribution de décalages circulaires à un port d'antenne lorsque les décalages circulaires ne peuvent pas être attribués au port d'antenne au moyen du procédé existant pour attribuer des décalages circulaires à des intervalles égaux. Le procédé comprend les étapes suivantes: la détermination du nombre M de peignes pour la transmission d'un signal de référence, M étant déterminé par le plus grand facteur R commun de X et (I), X est le nombre de ports d'antenne pour le signal de référence, X étant le nombre de ports d'antenne pour le signal de référence, (I) étant le nombre maximal de décalages circulaires sur un peigne, X et (I) sont des nombres entiers positifs, et M est un nombre entier supérieur à 1; et la transmission du signal de référence sur les M peignes.
PCT/CN2022/104684 2021-08-03 2022-07-08 Procédé et appareil de communication WO2023011110A1 (fr)

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