WO2022042618A1 - Procédé de transmission de signaux et appareil de communication - Google Patents

Procédé de transmission de signaux et appareil de communication Download PDF

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Publication number
WO2022042618A1
WO2022042618A1 PCT/CN2021/114623 CN2021114623W WO2022042618A1 WO 2022042618 A1 WO2022042618 A1 WO 2022042618A1 CN 2021114623 W CN2021114623 W CN 2021114623W WO 2022042618 A1 WO2022042618 A1 WO 2022042618A1
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WIPO (PCT)
Prior art keywords
sequence
equal
prime number
length
mapping relationship
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PCT/CN2021/114623
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English (en)
Chinese (zh)
Inventor
曲秉玉
李博
龚名新
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华为技术有限公司
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Publication of WO2022042618A1 publication Critical patent/WO2022042618A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0224—Channel estimation using sounding signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0096—Indication of changes in allocation
    • H04L5/0098—Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements

Definitions

  • the present application relates to the field of communications, and more particularly, to methods and communication apparatuses for transmitting signals.
  • the terminal device needs to send an uplink reference signal (for example, a sounding reference signal (SRS) or a demodulation reference signal (DMRS)) to the network device, so that the network device can obtain the terminal by using the uplink reference signal sent by the terminal device.
  • an uplink reference signal for example, a sounding reference signal (SRS) or a demodulation reference signal (DMRS)
  • SRS sounding reference signal
  • DMRS demodulation reference signal
  • Device-to-network device uplink channel information.
  • TDD time division duplex
  • the uplink channel and the downlink channel are reciprocal, so the downlink channel information can also be obtained through the uplink reference signal, and the downlink channel state information is used for precoding during downlink data transmission , Modulation and coding mode is determined, etc. In this way, the quality of the channel estimation based on the uplink reference signal will affect the downlink throughput.
  • the peak-to-average power ratio (PAPR) of the uplink reference signal sequence obtained by the existing method is relatively high.
  • PAPR peak-to-average power ratio
  • the higher the PAPR of the signal the lower the maximum transmit power available to the communication device. If the PAPR is too high, the transmission power of the uplink reference signal of the edge users will be low in the coverage scenario, resulting in a low received signal-to-noise ratio (SNR) of the uplink reference signal, which seriously affects the quality of channel estimation.
  • SNR received signal-to-noise ratio
  • the present application provides a method and a communication device for transmitting a signal, which are beneficial to reduce the PAPR of an uplink reference signal, thereby improving the quality of channel estimation.
  • the first sequence may be an uplink reference signal sequence.
  • the first sequence may be an SRS sequence or a DMRS sequence.
  • the group identifier may be a group number or a group ID or the like.
  • the communication device Set the mapping relationship to determine the first parameter used to determine the first sequence.
  • the first parameter is a value related to both the length of the first sequence and the group identifier, not just the length of the first sequence.
  • the first sequence generated by the solution in this embodiment of the present application is more suitable, and the first signal can have a lower PAPR on the premise of ensuring that the cross-correlation between the first signal and other uplink reference signals is low.
  • u is a group identifier
  • the value of N is associated with the value of u.
  • the mapping the first sequence to M subcarriers includes: mapping the M subcarriers in the first sequence The items are respectively mapped to the consecutive M subcarriers; or, the M items in the first sequence are respectively mapped to the M subcarriers at equal intervals.
  • the first parameter is greater than or equal to a first prime number, and the first prime number is less than or equal to the first length or the first prime number is the smallest prime number greater than or equal to the first length.
  • the first parameter belongs to one of an existing set of possible values.
  • the complexity of the implementation is not increased.
  • the present application jointly determines the value of the first parameter according to the group identifier and the first length, thereby helping to reduce the determination of PAPR of the first signal.
  • the first base sequence is a sequence determined based on a Zadoff-Chu (ZC) sequence or a Wiener sequence,
  • x q (m) is the Zadoff-Chu sequence
  • N is the length of the Zadoff-Chu sequence, which is an integer greater than 1
  • q is a natural number relatively prime to N, and q is greater than 0 and less than N
  • m 0,1,...,N-1;
  • x q (m) is the Wiener sequence
  • N is the length of the Wiener sequence, which is an integer greater than 1
  • q is a natural number relatively prime to N, and q is greater than 0 and less than N
  • m 0, 1 ,...,N-1;
  • the first base sequence satisfies:
  • q is determined according to the first group identifier and the first parameter.
  • the first base sequence satisfies:
  • the first base sequence satisfies:
  • u is the first set of identifiers
  • u is an integer greater than or equal to 0 and less than X-1
  • X is a prime number
  • v is equal to 0 or 1
  • q is an integer greater than 0 and less than N.
  • the first signal is an uplink reference signal.
  • the preset mapping relationship includes multiple (u, M as shown in Table 1 in the detailed description section) , N) some or all of the triples in the triples, and the preset mapping relationship includes at least one (u, M, N) triples in the (u, M, N) triples N is not the largest prime number less than or equal to M, or N in the at least one (u, M, N) triplet is not the smallest prime number greater than or equal to M.
  • the preset mapping relationship includes multiple (u, M as shown in Table 2 in the detailed description section) , N) some or all of the triples in the triples, and the preset mapping relationship includes at least one (u, M, N) triples in the (u, M, N) triples N is not the largest prime number less than or equal to M, or N in the at least one (u, M, N) triplet is not the smallest prime number greater than or equal to M.
  • the preset mapping relationship includes multiple (u, M as shown in Table 3 in the detailed description section) , N) some or all of the triples in the triples, and the preset mapping relationship includes at least one (u, M, N) triples in the (u, M, N) triples N is not the largest prime number less than or equal to M, or N in the at least one (u, M, N) triplet is not the smallest prime number greater than or equal to M.
  • the preset mapping relationship includes multiple (u, M as shown in Table 4 in the detailed description section) , N) some or all of the triples in the triples, and the preset mapping relationship includes at least one (u, M, N) triples in the (u, M, N) triples N is not the largest prime number less than or equal to M, or N in the at least one (u, M, N) triplet is not the smallest prime number greater than or equal to M.
  • the value of N can be different.
  • the value of the first length is 36
  • the value of the first group of identifiers is 0, and the value of the first parameter can be obtained from Table 1 as 73
  • the value of the first length is 36
  • the value of the first group of identifiers is The value is 1, and it can be obtained from Table 1 that the value of the first parameter is 131.
  • the first sequence may be an uplink reference signal sequence.
  • the first sequence may be an SRS sequence or a DMRS sequence.
  • the group identifier may be a group number or a group ID or the like.
  • the first parameter is a value related to the length of the first sequence and the group identifier, not only related to the length of the first sequence, so that a A more suitable first parameter, so that the first sequence determined by the solution in this embodiment of the present application is more suitable, and can make the first
  • the signal has a lower PAPR.
  • u is a group identifier
  • the value of N is associated with the value of u.
  • the receiving the first signal carried on M subcarriers includes: acquiring the first signal on consecutive M subcarriers the first signal; or, acquiring the first signal on M subcarriers at equal intervals.
  • the first parameter is greater than or equal to a first prime number, and the first prime number is less than or equal to the first length or the first prime number is the smallest prime number greater than or equal to the first length.
  • the first parameter belongs to one of an existing set of possible values.
  • the complexity of the implementation is not increased.
  • the present application jointly determines the value of the first parameter according to the first set of identifiers and the first length, thereby helping Decrease the PAPR of the determined first signal.
  • the first base sequence is a sequence determined based on a Zadoff-Chu sequence or a Wiener sequence
  • x q (m) is the Zadoff-Chu sequence
  • N is the length of the Zadoff-Chu sequence, which is an integer greater than 1
  • q is a natural number relatively prime to N, and q is greater than 0 and less than N
  • m 0,1,...,N-1;
  • x q (m) is the Wiener sequence
  • N is the length of the Wiener sequence, which is an integer greater than 1
  • q is a natural number relatively prime to N, and q is greater than 0 and less than N
  • m 0, 1 ,...,N-1;
  • the first base sequence satisfies:
  • q is determined according to the first group identifier and the first parameter.
  • the first base sequence satisfies:
  • the first base sequence satisfies:
  • u is the first set of identifiers
  • u is an integer greater than or equal to 0 and less than X-1
  • X is a prime number
  • v is equal to 0 or 1
  • q is an integer greater than 0 and less than N.
  • the first signal is an uplink reference signal.
  • the preset mapping relationship includes multiple ((u, M, N) part or all of the triples, and the preset mapping relationship includes at least one (u, M, N) triple in the (u, M, N) triples N of is not the largest prime number less than or equal to M, or N in the at least one (u, M, N) triplet is not the smallest prime number greater than or equal to M.
  • the preset mapping relationship includes multiple (u, M as shown in Table 2 in the detailed description section) , N) some or all of the triples in the triples, and the preset mapping relationship includes at least one (u, M, N) triples in the (u, M, N) triples N is not the largest prime number less than or equal to M, or N in the at least one (u, M, N) triplet is not the smallest prime number greater than or equal to M.
  • the preset mapping relationship includes multiple (u, M as shown in Table 3 in the detailed description section) , N) some or all of the triples in the triples, and the preset mapping relationship includes at least one (u, M, N) triples in the (u, M, N) triples N is not the largest prime number less than or equal to M, or N in the at least one (u, M, N) triplet is not the smallest prime number greater than or equal to M.
  • the preset mapping relationship includes multiple (u, M as shown in Table 4 in the detailed description section) , N) some or all of the triples in the triples, and the preset mapping relationship includes at least one (u, M, N) triples in the (u, M, N) triples N is not the largest prime number less than or equal to M, or N in the at least one (u, M, N) triplet is not the smallest prime number greater than or equal to M.
  • the value of N can be different.
  • the value of the first length is 36
  • the value of the first group of identifiers is 0, and the value of the first parameter can be obtained from Table 1 as 73
  • the value of the first length is 36
  • the value of the first group of identifiers is The value is 1, and it can be obtained from Table 1 that the value of the first parameter is 131.
  • the present application provides a communication device, the communication device having the function of implementing the method in the first aspect or any possible implementation manner thereof, or having the function of implementing the method in the second aspect or any possible implementation manner thereof function of the method.
  • the functions can be implemented by hardware, or can be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more units corresponding to the above functions.
  • the present application provides a communication device including a processor, a memory and a transceiver.
  • the memory is used to store the computer program
  • the processor is used to call and run the computer program stored in the memory, and control the transceiver to send and receive signals, so that the communication device executes the method in the first aspect or any possible implementation manner thereof, or A method as in the second aspect or any possible implementation thereof is performed.
  • the present application provides a communication device, comprising a processor and a communication interface, the communication interface being used for receiving a signal and transmitting the received signal to the processor, the processor processing the signal such that The method is performed as in the first aspect or any possible implementation thereof, or as in the second aspect or any possible implementation thereof.
  • the above-mentioned communication interface may be an interface circuit
  • the processor may be a processing circuit
  • the present application provides a communication apparatus, the apparatus includes at least one processor and at least one memory, the at least one processor is coupled to the at least one memory, and the at least one processor is configured to execute the at least one memory A computer program or instructions stored in a memory to cause the communication apparatus to perform a method as in the first aspect or any possible implementation thereof, or to perform a method as in the second aspect or any possible implementation thereof.
  • the at least one memory stores at least part of the triples in the mapping relationship table as in Table 1 to Table 4 in the detailed description section.
  • the present application provides a chip, including a logic circuit and a communication interface, the logic circuit is used to obtain the first length and the first set of identifiers described in the first aspect or any possible implementation manner thereof, and For performing the determination process as described in the first aspect or any possible implementations thereof to obtain the first sequence described in the above-mentioned first aspect or any possible implementations thereof, the communication interface is configured to output the first sequence.
  • the present application provides a chip including a logic circuit and a communication interface, where the communication interface is configured to receive the first signal in the second aspect or any possible implementation manner thereof, and the logic circuit is configured to execute The determination process as described in the second aspect or any possible implementations thereof.
  • the communication interface may include an input interface and an output interface.
  • the input interface is used for receiving the first signal.
  • the present application provides a computer-readable storage medium, where computer instructions are stored in the computer-readable storage medium. The method is performed, or as in the second aspect or any possible implementation thereof.
  • the present application provides a computer program product comprising computer program code that, when the computer program code is run on a computer, enables the method of the first aspect or any possible implementation thereof is performed, or the method as in the second aspect or any possible implementation thereof is performed.
  • the present application provides a wireless communication system, including the communication device according to any one of the above aspects and any possible implementations thereof.
  • FIG. 1 is a schematic structural diagram of a communication system to which an embodiment of the present application can be applied.
  • FIG. 2 is a schematic flowchart of a method for transmitting a signal provided by an embodiment of the present application.
  • FIG. 3 is a schematic diagram of the relationship between the base sequence generated based on the ZC sequence and the ZC sequence in a sequence group of the present application.
  • FIG. 4 is a schematic flowchart of generating a first signal in an embodiment of the present application.
  • FIG. 5 is a schematic diagram of mapping the first sequence to M subcarriers in an embodiment of the present application.
  • FIG. 6 is another schematic diagram of mapping the first sequence to M subcarriers in an embodiment of the present application.
  • FIG. 7 is a schematic diagram of cumulative PAPR distributions of 30 groups 408 long uplink reference signal sequences.
  • Figure 8 is the cumulative distribution of the cross-correlation (CORR) of the 408 long uplink reference signal sequences in each of the 30 groups and the uplink reference signal sequences of 5 lengths (408, 864, 912, 1152, 1104, respectively) in other groups schematic diagram.
  • CORR cross-correlation
  • FIG. 9 is a schematic structural diagram of a communication device according to an embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of a communication apparatus provided by another embodiment of the present application.
  • FIG. 11 is a schematic structural diagram of a communication apparatus provided by another embodiment of the present application.
  • FIG. 12 is a schematic structural diagram of a communication apparatus provided by another embodiment of the present application.
  • LTE long term evolution
  • FDD frequency division duplex
  • LTE TDD LTE TDD
  • UMTS universal mobile communication system Universal mobile telecommunication system
  • WiMAX worldwide interoperability for microwave access
  • 5G 5th generation
  • NR new radio
  • FIG. 1 is a schematic structural diagram of a communication system to which an embodiment of the present application can be applied.
  • the communication system 100 may include a network device 110 and at least one terminal device (such as the terminal device 120 in FIG. 1 ).
  • the terminal device 120 is connected to the network device 110 in a wireless manner.
  • Terminal equipment can be fixed or movable.
  • FIG. 1 is just a schematic diagram, and the communication system may also include other network devices, such as wireless relay devices and wireless backhaul devices, which are not shown in FIG. 1 .
  • the embodiments of the present application do not limit the number of network devices and terminal devices included in the communication system.
  • the terminal equipment in the embodiments of the present application may also be referred to as user equipment (user equipment, UE), user, access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, and user terminal , terminal, wireless communication equipment, user agent or user equipment, etc.
  • user equipment user equipment
  • UE user equipment
  • access terminal subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, and user terminal
  • terminal wireless communication equipment, user agent or user equipment, etc.
  • the terminal device may be a cellular phone, a smart watch, a wireless data card, a cell phone, a tablet computer, a personal digital assistant (PDA) computer, a wireless modem, a handheld device, a laptop computer, a machine type communication, MTC) terminal, computer with wireless transceiver function, virtual reality terminal equipment, augmented reality terminal equipment, wireless terminal in industrial control, wireless terminal in unmanned driving, wireless terminal in remote surgery, wireless terminal in smart grid, Wireless terminals in transportation security, wireless terminals in smart cities, wireless terminals in smart homes, wireless terminals in satellite communications (eg, satellite phones or satellite terminals, etc.), and so on.
  • the embodiments of the present application do not limit the specific technology and specific device form adopted by the terminal device.
  • the network device in this embodiment of the present application may be a device for communicating with a terminal device, and the network device may be a global system of mobile communication (GSM) system or a code division multiple access (CDMA)
  • GSM global system of mobile communication
  • CDMA code division multiple access
  • the base station (base transceiver station, BTS) in the LTE system can also be the base station (nodeB, NB) in the wideband code division multiple access (WCDMA) system, or the evolutionary base station (evolutional base station) in the LTE system.
  • nodeB eNB or eNodeB
  • it can also be a wireless controller in a cloud radio access network (CRAN) scenario
  • the network device can be a relay station, an access point, a vehicle-mounted device or a wearable device
  • the network device may be a terminal that performs the function of a base station in D2D communication or machine communication, or the network device may be a network device in a 5G network or a network device in a future evolved PLMN network, etc., which are not limited in the embodiments of the present application.
  • the network device in this embodiment of the present application may also be a module or unit that completes some functions of the base station, for example, may be a centralized unit (central unit, CU), or may be a distributed unit (distributed unit, DU).
  • the embodiments of the present application do not limit the specific technology and specific device form adopted by the network device.
  • the terminal equipment and network equipment in the embodiments of the present application can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; can also be deployed on water; and 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 terminal device and the network device in the embodiments of the present application may communicate through licensed spectrum, may also communicate through unlicensed spectrum, or may communicate through licensed spectrum and unlicensed spectrum at the same time.
  • the terminal device and the network device can communicate through the frequency spectrum below 6 GHz (gigahertz, GHz), and can also communicate through the frequency spectrum above 6 GHz, and can also use the frequency spectrum below 6 GHz and the frequency spectrum above 6 GHz to communicate simultaneously.
  • the embodiments of the present application do not limit the spectrum resources used between the terminal device and the network device.
  • the terminal device needs to send an uplink reference signal (for example, SRS or DMRS) to the network device, so that the network device can obtain uplink channel information from the terminal device to the network device by using the uplink reference signal sent by the terminal device.
  • an uplink reference signal for example, SRS or DMRS
  • the network device can obtain uplink channel information from the terminal device to the network device by using the uplink reference signal sent by the terminal device.
  • the downlink channel information can also be obtained through the uplink reference signal, and the downlink channel state information is used for precoding, modulation and coding mode determination during downlink data transmission, etc. In this way, the quality of the channel estimation based on the uplink reference signal will affect the downlink throughput.
  • the sequence of the uplink reference signal adopts the reference signal sequence generated by the cyclic shift of the base sequence.
  • the base sequence of length M is Then the uplink reference signal sequence generated by the base sequence satisfies:
  • r(n) is an uplink reference signal sequence
  • A is a complex constant
  • ⁇ is a cyclic shift value
  • j is an imaginary unit
  • n 0, 1, ..., M-1.
  • each sequence group contains sequences of different lengths, and each sequence group is indicated by a group identifier.
  • M the number of base sequences greater than or equal to 36 and less than 72
  • x q (m), q and is the intermediate value in the base sequence generation process q is an integer greater than 0 and less than N
  • M is the length of the uplink reference signal sequence
  • u is the group identifier of the base sequence
  • v is equal to 0 or 1
  • j is an imaginary unit
  • N is The largest prime number less than or equal to M, or N the smallest prime number greater than or equal to M.
  • the PAPR of the uplink reference signal sequence obtained in the above manner is relatively high. Taking a base sequence with a length of 408 as an example, the PAPR of the obtained uplink reference signal sequence is up to 5.8dB.
  • the higher the PAPR of the signal the lower the maximum transmission power available to the communication device. Therefore, if the PAPR is too high, the transmission power of the uplink reference signal of the edge user in the coverage scenario will be low, which will make the uplink The received SNR of the reference signal is relatively low, which seriously affects the quality of channel estimation.
  • the present application provides a signal transmission method and a communication device, which are beneficial to reduce the PAPR of the uplink reference signal, thereby improving the quality of channel estimation.
  • FIG. 2 is a schematic flowchart of a method for transmitting a signal provided by an embodiment of the present application.
  • the method shown in FIG. 2 can be executed by the terminal device and the network device, and can also be executed by a module or unit (eg, a circuit, a chip, or a system on a chip (SOC), etc.) in the terminal device and the network device.
  • a module or unit eg, a circuit, a chip, or a system on a chip (SOC), etc.
  • SOC system on a chip
  • step 210 the terminal device acquires the first length of the first sequence and the first set of identifiers.
  • the first sequence may be an uplink reference signal sequence.
  • the first sequence may be an SRS sequence or a DMRS sequence.
  • This embodiment of the present application does not specifically limit the manner in which the terminal device obtains the first length.
  • the terminal device determines the first length of the first sequence according to the radio resources configured for it by the network device and/or whether frequency hopping is performed.
  • the terminal device according to Determine the first length, where M RB is the number of resource blocks (resource block, RB), K TC is the comb value, is the number of subcarriers included in each RB.
  • M RB and K TC can be configured by network equipment.
  • the terminal device may also determine the first length M according to other methods, and M satisfies
  • This embodiment of the present application does not specifically limit the manner in which the terminal device acquires the first group of identifiers.
  • the terminal device receives the first set of identifiers u configured for it by the network device.
  • the terminal device determines the first group of identifiers based on the ID configured by the network device and/or the identifier of the time unit.
  • the identifier of the time unit may be a slot label or a symbol label.
  • the first set of identifiers u satisfies the following relationship:
  • c(n) is the number of OFDM symbols per slot, is the time slot label, l 0 is the starting position of the time domain, is the symbol number of OFDM in an SRS resource,
  • the number of consecutive OFDMs that can be configured for higher layer signaling; is the ID configured by the network device, c(n) can satisfy:
  • x 1 (n+31) (x 1 (n+3)+x 1 (n))mod 2
  • x 2 (n+31) (x 2 (n+3)+x 2 (n+2)+x 2 (n+1)+x 2 (n))mod 2
  • N C 1600
  • the initial value of c(n) can be
  • group hopping enbaled is enabled, in this example, by using the ID and the time unit identifier, the determined u can be changed with the ID and time, so that the inter-neighboring cells can be changed within a period of time.
  • the interference is more randomized, which in turn improves system performance.
  • the enabling of the above-mentioned group hopping can be notified through signaling, for example, through the high-level signaling groupOrSequenceHopping configuration: when the configuration indicates 'neither', group hopping is not enabled; when the configuration indicates 'groupHopping', group hopping is enabled.
  • the terminal device determines the first parameter according to the first length, the first group identifier and the preset mapping relationship.
  • the first parameter is one of the parameters used to determine the first base sequence
  • the first base sequence is used to determine the above-mentioned first sequence
  • each item in the first base sequence belongs to the parameter determined by e -j2 ⁇ k/N A set of values, where N is the first parameter.
  • the first parameter is greater than or equal to a first prime number, where the first prime number is the largest prime number less than or equal to the first length, or the first prime number is the smallest prime number greater than or equal to the first length.
  • the first parameter belongs to one of an existing set of possible values.
  • the hardware complexity is not increased.
  • the present application jointly determines the value of the first parameter according to the group identifier and the first length, thereby helping to reduce the determination of The first sequence of PAPRs.
  • mapping relationship is not specifically limited in this embodiment of the present application.
  • mapping relationship can be implemented through formulas, tables, and the like.
  • the mapping relationship includes some or all of the multiple (u, M, N) triples shown in Table 1, and the mapping relationship includes (u, M, N) N in at least one (u, M, N) triple of triples is not the largest prime number less than or equal to M, or N in at least one (u, M, N) triple is not greater than or equal to The smallest prime number of M.
  • mapping relationship includes a triple (u, M, N), which means that the mapping relationship maps (u, M) to N.
  • M is the first length
  • N is the first parameter
  • u is the first group of identifiers.
  • the mapping relationship includes some or all of the multiple (u, M, N) triples shown in Table 2, and the mapping relationship includes (u, M, N) ) N in at least one (u, M, N) triple of triples is not the largest prime number less than or equal to M, or N in at least one (u, M, N) triple is not greater than or The smallest prime number equal to M.
  • M is the length of the first sequence
  • u is the group identifier
  • N is the first parameter.
  • the mapping relationship includes some or all triples as shown in Table 1 or Table 2, where, is the first base sequence, M is the first length, N is the first parameter, x q (m), q and
  • q is an integer greater than 0 and less than N
  • ⁇ is a cyclic shift value
  • A is a complex constant
  • u is the first set of identifiers
  • u is greater than or equal to 0 and less than X
  • X is a prime number
  • v is the root number in the group
  • v is equal to 0 or 1
  • j is an imaginary unit.
  • q can be called the root index of the base sequence.
  • the mapping relationship includes some or all of the multiple (u, M, N) triples shown in Table 3, and the mapping relationship includes (u, M, N) ) N in at least one (u, M, N) triple of triples is not the largest prime number less than or equal to M, or N in at least one (u, M, N) triple is not greater than or The smallest prime number equal to M.
  • M is the first length
  • N is the first parameter
  • u is the first group of identifiers.
  • the mapping relationship includes some or all of the multiple (u, M, N) triples shown in Table 4, and the mapping relationship includes (u, M, N) ) N in at least one (u, M, N) triple of triples is not the largest prime number less than or equal to M, or N in at least one (u, M, N) triple is not greater than or The smallest prime number equal to M.
  • M is the first length
  • N is the first parameter
  • u is the first group of identifiers.
  • the mapping relationship includes some or all triples as shown in Table 3 or Table 4, where, is the first base sequence, M is the first length, N is the first parameter, x q (m), q and
  • q is an integer greater than 0 and less than N
  • ⁇ is a cyclic shift value
  • A is a complex constant
  • u is the first set of identifiers
  • u is greater than or equal to 0 and less than X
  • X is a prime number
  • v is the root number in the group
  • v is equal to 0 or 1
  • j is an imaginary unit.
  • q can be called the root index of the base sequence.
  • the value of N can be different.
  • the value of the first length is 36
  • the value of the first group of identifiers is 0, and the value of the first parameter can be obtained from Table 1 as 73
  • the value of the first length is 36
  • the value of the first group of identifiers is The value is 1, and it can be obtained from Table 1 that the value of the first parameter is 131.
  • step 230 the terminal device determines the first sequence based on the first parameter.
  • the terminal device determines the first sequence base sequence based on the first parameter, and further determines the first sequence based on the first base sequence.
  • the first sequence may satisfy:
  • r(n) is the first sequence
  • the embodiments of the present application do not specifically limit the first base sequence.
  • the first base sequence is a sequence generated based on a Zadoff-Chu sequence or a Wiener sequence, wherein:
  • x q (m) is the Zadoff-Chu sequence
  • N is the length of the Zadoff-Chu sequence, which is an integer greater than 1
  • q is a natural number relatively prime to N, and q is greater than 0 and less than N
  • m 0,1,...,N-1;
  • x q (m) is the Wiener sequence
  • N is the length of the Wiener sequence, which is an integer greater than 1
  • q is a natural number relatively prime to N, and q is greater than 0 and less than N
  • m 0, 1 ,...,N-1;
  • the first base sequence satisfies:
  • q is determined according to the first group identifier and the first parameter.
  • the first base sequence may satisfy:
  • q is an integer greater than 0 and less than N
  • ⁇ is a cyclic shift value
  • A is a complex constant
  • u is the first set of identifiers
  • u is greater than or equal to 0 and less than X
  • An integer of -1 X is a prime number
  • v is the root number in the group
  • v is equal to 0 or 1
  • j is an imaginary unit.
  • q can be called the root index of the base sequence.
  • the first base sequence may satisfy:
  • q is an integer greater than 0 and less than N
  • ⁇ is a cyclic shift value
  • A is a complex constant
  • u is the first set of identifiers
  • u is greater than or equal to 0 and less than X
  • An integer of -1 X is a prime number
  • v is the root number in the group
  • v is equal to 0 or 1
  • j is an imaginary unit.
  • q can be called the root index of the base sequence.
  • the embodiments of the present application describe the process of determining the first sequence in a step-by-step manner. It should be understood that the actual determination process of the first sequence is not necessarily step-by-step according to the above-mentioned step-by-step manner, for example, no steps or Use other step-by-step methods, etc.
  • the terminal device can directly determine the first sequence according to the acquired first length M, the first group identifier u, the cyclic shift value, and the above-mentioned root sequence number v.
  • the parameters in the above formulas may have other representations.
  • r u,v (n) when it comes to the computation of u, v, r(n) can be expressed as r u,v (n), It can be expressed as Combined with the embodiments in this application, the first sequence can satisfy
  • some parameters in the formula may also be determined by other parameters, which are not specifically limited in the present invention.
  • the value of u may be determined according to other parameters, or may be associated with other parameters.
  • l' is an orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) symbol label of the SRS resource.
  • OFDM orthogonal frequency division multiplexing
  • ⁇ i may refer to the ⁇ value in this embodiment of the present invention.
  • the first sequence may be stored by the terminal device or calculated by the terminal device according to a predefined formula.
  • step 240 the terminal device maps the first sequence to the M subcarriers to generate a first signal.
  • the first signal may be generated through steps 2401 and 2402 as shown in FIG. 4 .
  • the terminal device maps the M items in the first sequence to the M subcarriers, respectively, to obtain the frequency domain signal of M points.
  • the embodiments of the present application do not specifically limit the manner in which the terminal device maps the M items in the first sequence to the M subcarriers respectively.
  • the terminal device maps the M items in the first sequence to M consecutive subcarriers, respectively.
  • the M items included in the first sequence are r(0)-r(M-1) respectively, and the terminal device sequentially converts r(0) in the order of subcarriers from small to large (or from large to small).
  • )-r(M-1) is mapped to continuously distributed sub-carriers s+0 to sub-carriers s+M-1, one item is mapped to one sub-carrier.
  • s+0 and s+M-1 are the numbers of the subcarriers.
  • the terminal device maps the M items in the first sequence to M subcarriers at equal intervals, and the interval may be greater than or equal to 1 subcarrier.
  • the interval is 1 as an example.
  • the M items included in the first sequence are r(0)-r(M-1) respectively. Map r(0)-r(M-1) to the equally spaced subcarriers s+0, subcarriers s+2,..., subcarriers s+2(M-1) in the order of small), One item is mapped to one subcarrier.
  • s+0 and s+M-1 are the numbers of the subcarriers.
  • mapping an item in the first sequence to a subcarrier is to carry the item on the subcarrier.
  • the terminal device converts the frequency domain signal at point M into a time domain signal, and adds a cyclic prefix (cyclic prefix, CP) to the time domain signal to generate a first signal.
  • a cyclic prefix cyclic prefix, CP
  • the terminal device performs an inverse discrete Fourier transform (inverse discrete fourier transform, IDFT) on the frequency domain signal at point M to obtain a corresponding time domain signal.
  • IDFT inverse discrete fourier transform
  • step 250 the terminal device sends a first signal to the network device.
  • the network device receives the first signal sent by the terminal device.
  • the terminal device sends the first signal through radio frequency, that is, the terminal device sends the first signal bearing the first sequence on the above-mentioned M subcarriers.
  • the network device receives the first signal sent by the terminal device through the radio frequency, that is, the network device receives the first signal carried on the above-mentioned M subcarriers.
  • the process for the network device to receive the first signal carried on the M subcarriers is: acquiring the time domain signal and removing the cyclic prefix; then performing discrete Fourier transform (discrete fourier transform, DFT) on the signal from which the cyclic prefix has been removed , to obtain the frequency domain signal.
  • DFT discrete Fourier transform
  • step 260 the network device determines a first sequence.
  • the network device may store the first sequence locally, the network device may read the locally stored first sequence, or the network device may generate the first sequence according to a formula.
  • step 270 the network device processes the first signal according to the first sequence.
  • the network device performs channel estimation according to the first sequence and the received first signal.
  • the signal r'(n) received by the network device on the nth subcarrier among the M subcarriers can be expressed as:
  • h(n) is the uplink channel state information on the nth subcarrier
  • r(n) is the nth item of the first sequence stored locally by the network device
  • n(n) is the noise signal
  • n 0, 1, ..., M-1.
  • the network device knows the time-frequency resources occupied by the first signal, and can perform the following operations on the received r'(n) and r(n) to obtain h(n):
  • (r(n)) * is the conjugate of r(n)
  • n'(n) is the interference term.
  • the communication device can determine the length of the first sequence and the group identifier. Used to determine the first parameter of the first sequence, in this way, the first parameter is a value related to the length of the first sequence and the group identifier, not only related to the length of the first sequence, so that a more suitable value can be determined. first parameter.
  • the first sequence determined by the solution in this embodiment of the present application enables the first signal to have a lower PAPR on the premise that the cross-correlation between the first signal and other uplink reference signals is low.
  • FIG. 7 and FIG. 8 compared with the 30 groups of 408-long uplink reference signal sequences determined according to the solution of the embodiment of the present application and the 30 groups of 408-long uplink reference signal sequences determined based on the prior art, compared with other The cross-correlation between uplink reference signal sequences does not change much, but the PAPR is significantly reduced.
  • the first sequence determined in the embodiment of the present application is more suitable, thereby helping to reduce the PAPR of the first sequence, thereby improving the quality of channel estimation.
  • the communication apparatus includes corresponding hardware structures and/or software modules for performing each function.
  • the units and method steps of each example described in conjunction with the embodiments disclosed in the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is performed by hardware or computer software-driven hardware depends on the specific application scenarios and design constraints of the technical solution.
  • the communication apparatus may be a terminal device or a network device, and may also be a module (eg, a chip) applied to the terminal device or the network device.
  • FIG. 9 is a schematic structural diagram of a communication device according to an embodiment of the present application.
  • the communication apparatus 900 shown in FIG. 9 may correspond to the above terminal equipment.
  • the communication apparatus 900 includes a processing unit 910 and a transceiver unit 920 .
  • the processing unit 910 is further configured to map the first sequence to the M subcarriers to generate a first signal
  • the transceiver unit 920 is configured to send the first signal.
  • the processing unit 910 is specifically configured to: map the M items in the first sequence to consecutive M subcarriers; or map the M items in the first sequence to on M subcarriers at equal intervals.
  • the first parameter is greater than or equal to a first prime number
  • the first prime number is the largest prime number less than or equal to the first length, or the first prime number is greater than or equal to the first length. smallest prime number.
  • the first base sequence is a sequence generated based on Zadoff-Chu sequence or Wiener sequence, wherein:
  • x q (m) is the Zadoff-Chu sequence
  • N is the length of the Zadoff-Chu sequence, which is an integer greater than 1
  • q is a natural number relatively prime to N, and q is greater than 0 and less than N
  • m 0,1,...,N-1;
  • x q (m) is the Wiener sequence
  • N is the length of the Wiener sequence, which is an integer greater than 1
  • q is a natural number relatively prime to N, and q is greater than 0 and less than N
  • m 0, 1 ,...,N-1;
  • the first base sequence satisfies:
  • q is determined according to the first group identifier and the first parameter.
  • the first base sequence satisfies:
  • the first base sequence satisfies:
  • u is the first set of identifiers
  • u is an integer greater than or equal to 0 and less than X-1
  • X is a prime number
  • v is equal to 0 or 1
  • q is an integer greater than 0 and less than N.
  • the preset mapping relationship for the same value of the first length, there are at least two different values of the first group identifier corresponding to different values of the first parameter.
  • the preset mapping relationship includes some or all of the multiple (u, M, N) triples shown in Table 1, Table 2, Table 3 or Table 4, and all triples are included.
  • N in at least one (u, M, N) triple of the (u, M, N) triples included in the preset mapping relationship is not the largest prime number less than or equal to M, or the at least one ( u, M, N) N in the triplet is not the smallest prime number greater than or equal to M.
  • the first signal is an uplink reference signal.
  • the processing unit 910 may be implemented by a processor.
  • the transceiving unit 920 may be implemented by a transceiver.
  • the processing unit 910 and the transceiver unit 920 reference may be made to the relevant descriptions of the method embodiments, and details are not repeated here.
  • FIG. 10 is a schematic structural diagram of a communication apparatus according to another embodiment of the present application.
  • the communication apparatus 1000 shown in FIG. 10 may correspond to the above network device.
  • the communication apparatus 1000 includes a processing unit 1010 and a transceiver unit 1020 .
  • the transceiver unit 1020 is configured to receive the first signal carried on the M subcarriers.
  • the processing unit 1010 is further configured to process the first signal according to the first sequence.
  • the transceiver unit 1010 is specifically configured to: acquire the first signal on consecutive M subcarriers; or acquire the first signal on M equally spaced subcarriers.
  • the first parameter is greater than or equal to a first prime number
  • the first prime number is the largest prime number less than or equal to the first length, or the first prime number is greater than or equal to the first length. smallest prime number.
  • the first base sequence is a sequence generated based on Zadoff-Chu sequence or Wiener sequence, wherein,
  • x q (m) is the Zadoff-Chu sequence
  • N is the length of the Zadoff-Chu sequence, which is an integer greater than 1
  • q is a natural number relatively prime to N, and q is greater than 0 and less than N
  • m 0,1,...,N-1;
  • x q (m) is the Wiener sequence
  • N is the length of the Wiener sequence, which is an integer greater than 1
  • q is a natural number relatively prime to N, and q is greater than 0 and less than N
  • m 0, 1 ,...,N-1;
  • the first base sequence satisfies:
  • q is determined according to the first group identifier and the first parameter.
  • the first base sequence satisfies:
  • the first base sequence satisfies:
  • u is the first set of identifiers
  • u is an integer greater than or equal to 0 and less than X-1
  • X is a prime number
  • v is equal to 0 or 1
  • q is an integer greater than 0 and less than N.
  • the preset mapping relationship for the same value of the first length, there are at least two different values of the first group identifier corresponding to different values of the first parameter.
  • the preset mapping relationship includes some or all of the multiple (u, M, N) triples shown in Table 1, Table 2, Table 3 or Table 4, and all triples are included.
  • N in at least one (u, M, N) triple of the (u, M, N) triples included in the preset mapping relationship is not the largest prime number less than or equal to M, or the at least one ( u, M, N) N in the triplet is not the smallest prime number greater than or equal to M.
  • the first signal is an uplink reference signal.
  • the processing unit 1010 may be implemented by a processor.
  • the transceiving unit 1020 may be implemented by a transceiver.
  • the processing unit 1010 and the transceiver unit 1020 reference may be made to the relevant descriptions of the method embodiments, which will not be repeated here.
  • FIG. 11 is a schematic structural diagram of a communication apparatus provided by another embodiment of the present application.
  • the communication device 1100 includes a processor 1110 and an interface circuit 1120 .
  • the processor 1110 and the interface circuit 1120 are coupled to each other.
  • the interface circuit 1120 can be a transceiver or an input-output interface.
  • the communication apparatus 1100 may further include a memory 1130 for storing instructions executed by the processor 1110 or input data required by the processor 1110 to execute the instructions or data generated after the processor 1110 executes the instructions.
  • the processor 1110 is used to perform the functions of the above processing unit 910
  • the interface circuit 1120 is used to perform the functions of the above mentioned transceiver unit 920 .
  • the chip implements the functions of the terminal device in the above method embodiments.
  • the chip receives information from other modules (such as radio frequency modules or antennas) in the terminal device, and the information is sent to the terminal device by other network elements; or, the chip sends information to other modules in the terminal device (such as radio frequency modules or antennas) information, which is sent by the terminal device to other network elements.
  • FIG. 12 is a schematic structural diagram of a communication apparatus provided by another embodiment of the present application.
  • the communication device 1200 includes a processor 1210 and an interface circuit 1220 .
  • the processor 1210 and the interface circuit 1220 are coupled to each other.
  • the interface circuit 1220 can be a transceiver or an input-output interface.
  • the communication apparatus 1200 may further include a memory 1230 for storing instructions executed by the processor 1210 or input data required by the processor 1210 to execute the instructions or data generated after the processor 1210 executes the instructions.
  • the processor 1210 is used to execute the function of the above-mentioned processing unit 1010
  • the interface circuit 1220 is used to implement the function of the above-mentioned transceiver unit 1020 .
  • the chip implements the functions of the network device in the above method embodiments.
  • the chip receives information from other modules (such as radio frequency modules or antennas) in the network equipment, and the information is sent to the network equipment by other network elements; or, the chip sends information to other modules (such as radio frequency modules or antennas) in the network equipment information, which is sent by the network device to other network elements.
  • an embodiment of the present application also provides a communication apparatus, the apparatus includes at least one processor and at least one memory, the at least one processor is coupled to the at least one memory, and the at least one processor is configured to execute the A computer program or instruction stored in at least one memory, so that the communication apparatus executes the method in each of the above method embodiments.
  • the at least one memory stores at least part of the triples in the mapping relationship table as in Table 1 to Table 4 in the detailed description section.
  • the processor in the embodiments of the present application may be a central processing unit (Central Processing Unit, CPU), and may also be other general-purpose 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.
  • a general-purpose processor may be a microprocessor or any conventional processor.
  • the method steps in the embodiments of the present application may be implemented in a hardware manner, or may be implemented in a manner in which a processor executes software instructions.
  • Software instructions can be composed of corresponding software modules, and software modules can be stored in random access memory (Random Access Memory, RAM), flash memory, read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM) , PROM), Erasable Programmable Read-Only Memory (Erasable PROM, EPROM), Electrically Erasable Programmable Read-Only Memory (Electrically Erasable Programmable Read-Only Memory (Electrically EPROM, EEPROM), registers, hard disks, removable hard disks, CD-ROMs or known in the art in any other form of storage medium.
  • RAM Random Access Memory
  • ROM read-only memory
  • PROM programmable read-only memory
  • PROM Erasable Programmable Read-Only Memory
  • EPROM Electrically Erasable Programmable Read-Only Memory
  • An exemplary storage medium is coupled to the processor, such that the processor can read information from, and write information to, the storage medium.
  • the storage medium can also be an integral part of the processor.
  • the processor and storage medium may reside in an ASIC.
  • the ASIC may be located in the end device.
  • the processor and the storage medium may also exist in the terminal device as discrete components.
  • the computer program product includes one or more computer programs or instructions.
  • the computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable device.
  • the computer program or instructions may be stored in or transmitted over a computer-readable storage medium.
  • the computer-readable storage medium can be any available media that can be accessed by a computer or a data storage device such as a server that integrates one or more available media.
  • the usable media can be magnetic media, such as floppy disks, hard disks, magnetic tapes; optical media, such as DVD; and semiconductor media, such as solid state disks (SSD).
  • “at least one” means one or more, and “plurality” means two or more.
  • “And/or”, which describes the association relationship of the associated objects, indicates that there can be three kinds of relationships, for example, A and/or B, which can indicate: the existence of A alone, the existence of A and B at the same time, and the existence of B alone, where A, B can be singular or plural.
  • the character “/” generally indicates that the related objects are a kind of "or” relationship; in the formula of this application, the character "/” indicates that the related objects are a kind of "division" Relationship.
  • the disclosed system, apparatus and method may be implemented in other manners.
  • the apparatus 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 may be combined or Can be integrated into another system, or some features can be ignored, or not implemented.
  • the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.
  • the functions, if implemented in the form of software functional units and sold or used as independent products, may be stored in a computer-readable storage medium.
  • the technical solution of the present application can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution.
  • the computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk and other media that can store program codes .

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Abstract

La présente demande concerne un procédé de transmissions de signaux et un appareil. Dans la solution technique de la présente demande, un appareil de communication peut déterminer, selon la longueur d'une première séquence, un identifiant de groupe et un mappage prédéfini, un premier paramètre pour déterminer la première séquence. En tant que tel, le premier paramètre est une valeur associée à la fois à la longueur de la première séquence et à l'identifiant de groupe et non seulement à la longueur de la première séquence, de sorte qu'un premier paramètre plus approprié puisse être déterminé. Ainsi, la première séquence déterminée au moyen de la solution de la présente demande est plus appropriée, de telle sorte qu'un premier signal ait un PAPR inférieur tout en garantissant une corrélation croisée inférieure entre le premier signal et d'autres signaux de liaison montante de référence.
PCT/CN2021/114623 2020-08-31 2021-08-26 Procédé de transmission de signaux et appareil de communication WO2022042618A1 (fr)

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