WO2022082492A1 - Procédé d'envoi de signal, procédé de réception de signal, et appareil de communication - Google Patents

Procédé d'envoi de signal, procédé de réception de signal, et appareil de communication Download PDF

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Publication number
WO2022082492A1
WO2022082492A1 PCT/CN2020/122434 CN2020122434W WO2022082492A1 WO 2022082492 A1 WO2022082492 A1 WO 2022082492A1 CN 2020122434 W CN2020122434 W CN 2020122434W WO 2022082492 A1 WO2022082492 A1 WO 2022082492A1
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Prior art keywords
srs
sequence
subband
bandwidth
frequency hopping
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PCT/CN2020/122434
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English (en)
Chinese (zh)
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龚名新
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华为技术有限公司
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Priority to PCT/CN2020/122434 priority Critical patent/WO2022082492A1/fr
Publication of WO2022082492A1 publication Critical patent/WO2022082492A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • the present application relates to the field of communication technologies, and in particular, to a method and a communication device for signal transmission and reception.
  • the network device uses a sounding reference signal (SRS) to estimate the uplink channel quality, so as to allocate a resource block (RB) with better uplink channel quality to the terminal device to implement resource scheduling.
  • SRS sounding reference signal
  • RB resource block
  • TDD time division duplexing
  • the uplink channel and the downlink channel are reciprocal.
  • SRS can also be used to obtain downlink channel coefficients. If the terminal device transmits the SRS in a frequency-hopping manner, the SRS occupies multiple symbols in the time domain and occupies a continuous bandwidth in the frequency domain.
  • the frequency hopping subband occupied by the SRS on one symbol includes a part of the above-mentioned "continuous bandwidth", and the frequency hopping subband occupied by the SRS on different symbols is a different part of the above-mentioned "continuous bandwidth”.
  • the terminal device may transmit the SRS on some or all resource blocks (resource blocks, RBs) of the frequency hopping subband.
  • the SRS is generated based on the SRS sequence, and the SRS sequence is generated based on the base sequence.
  • terminal device 1 Since the base sequence is determined based on the number of subcarriers occupied by the SRS on each symbol, if terminal device 1 sends the SRS on all RBs of the frequency hopping subband, terminal device 2 sends the SRS on some RBs of the frequency hopping subband.
  • the base sequences determined by the terminal device 1 and the terminal device 2 are different.
  • terminal equipment 1 and terminal equipment 2 use code division multiplexing to transmit SRS
  • code division multiplexing requires terminal equipment 1 and terminal equipment 2 to use the same base sequence
  • terminal equipment 1 and terminal equipment 2 cannot By using code division multiplexing to transmit the SRS, the network device cannot determine the quality of the uplink channel, which reduces the flexibility of resource scheduling.
  • Embodiments of the present application provide a method and a communication device for signal transmission and reception, which can improve resource scheduling flexibility.
  • an embodiment of the present application provides a method for sending a signal
  • the execution body of the method may be a terminal device or a chip applied in the terminal device.
  • the following description takes the execution subject being a terminal device as an example.
  • the method includes: the terminal device determines a sounding reference signal SRS sequence.
  • the SRS sequence is obtained based on the base sequence, the base sequence is determined based on the frequency hopping subband and the transmission subband of the SRS, and the bandwidth of the frequency hopping subband is different from the bandwidth of the transmission subband.
  • the SRS sequence is used to generate the SRS.
  • the terminal device sends the SRS to the network device.
  • the terminal device 1 determines the base sequence based on the frequency hopping subband and the transmission subband, even if the "bandwidth of the frequency hopping subband and the transmission subband of the terminal device 2" If the bandwidth of the sending subband is the same, the two terminal devices (ie, the terminal device 1 and the terminal device 2) can also send the SRS in a code division multiplexing manner. Since the base sequence is determined based on the frequency hopping subband and the transmission subband, the base sequence of the terminal device 1 is a part of the base sequence of the terminal device 2 .
  • the base sequence of terminal device 1 and the base sequence of terminal device 2 correspond to the same elements of the same subcarrier.
  • the terminal equipment 1 and the terminal equipment 2 can also send SRS in a code division multiplexing manner, so that the network equipment can determine the uplink channel quality and improve the flexibility of resource scheduling.
  • the SRS sequence satisfies:
  • r(n) is the element with index n in the SRS sequence
  • x(n) is the element with index n in the base sequence
  • N is the length of the SRS sequence and base sequence
  • A is a non-zero complex number, such as a power control factor
  • ⁇ is a real number, for example, the value of ⁇ is a cyclic shift value.
  • the terminal device determines the SRS sequence according to the base sequence, and determines the SRS sequence according to the "process of using all the RBs of the frequency hopping subband to send the SRS".
  • the formula for the SRS sequence is the same.
  • the base sequence is a partial sequence of the first sequence ⁇ y(m) ⁇ .
  • the first sequence ⁇ y(m) ⁇ is determined based on the bandwidth of the frequency hopping subband and the comb parameter of the SRS. That is, the base sequence is a partial fragment of the first sequence ⁇ y(m) ⁇ .
  • the above-mentioned "partial sequence" may be a continuous sequence in the first sequence ⁇ y(m) ⁇ , or may be a discontinuous sequence. For example, taking the mode of comb tooth 2 as an example, in the case where the bandwidth of the frequency hopping subband is 24 RBs, if the bandwidth of the transmission subband is 12 RBs, the length of the first sequence is 144.
  • the terminal device truncates half of the first sequence to obtain a base sequence with a length of 72.
  • the “bandwidth of the frequency hopping subband and the bandwidth of the transmission subband” of the terminal device 1 are different, the “bandwidth of the frequency hopping subband and the bandwidth of the transmission subband” of the terminal device 2 are the same, because the base sequence of the terminal device 1 It is a partial sequence of the first sequence, the base sequence of terminal equipment 2 is the first sequence, and the elements corresponding to the same subcarrier in the base sequences of the two terminal equipments are the same, which means "terminal equipment 1 and terminal equipment 2 use code division multiplexing.
  • the way to send SRS" laid the foundation.
  • the first sequence satisfies:
  • y(m) is the element with index m in the first sequence
  • M denotes the length of the first sequence, and is a value determined based on the bandwidth of the frequency hopping subband and the comb parameter of the SRS
  • M ZC is determined based on M
  • a prime number of for example, M ZC is the smallest prime number greater than M, or M ZC is the largest prime number less than M
  • q is an integer, and 0 ⁇ q ⁇ M ZC .
  • the position of the base sequence in the first sequence is determined based on the frequency domain position of the transmission subband and the frequency domain position of the frequency hopping subband. For example, when the transmission subband is in the first half of the frequency hopping subband, the base sequence is the first half sequence of the first sequence ⁇ y(m) ⁇ . When the transmission subband is the second half of the frequency hopping subband, the base sequence is the second half sequence of the first sequence ⁇ y(m) ⁇ .
  • the “bandwidth of the frequency hopping subband and the bandwidth of the transmission subband” of the terminal device 1 are different, the “bandwidth of the frequency hopping subband and the bandwidth of the transmission subband” of the terminal device 2 are the same, because the base sequence of the terminal device 1
  • the position in the first sequence of the terminal device 2 is determined based on the position of the transmission subband in the frequency hopping subband, then the base sequence of the terminal device 1 corresponds to the base sequence (ie the first sequence) of the terminal device 2
  • the elements of the same subcarrier are the same, so that the terminal device 1 and the terminal device 2 can also transmit the SRS in a code division multiplexing manner, thereby improving the flexibility of resource scheduling.
  • the base sequence satisfies:
  • n 0 is a numerical value determined based on the frequency domain position of the transmission subband and the frequency domain position of the frequency hopping subband
  • M represents the length of the first sequence, and is determined based on the bandwidth of the frequency hopping subband and the comb parameters of the SRS value of .
  • the element with index n in the base sequence is “the element with index m in the first sequence”.
  • the base sequence of the terminal device 1 The elements corresponding to the same subcarrier in the base sequence (ie, the first sequence) of the neutralization terminal device 2 are the same, so that the terminal device 1 and the terminal device 2 can also transmit the SRS in a code division multiplexing manner.
  • an embodiment of the present application provides a method for receiving a signal, and the execution body of the method may be a network device or a chip applied in the network device.
  • the following description takes the execution subject being a network device as an example.
  • the method includes: a network device receiving a sounding reference signal SRS from a terminal device.
  • the network device determines the SRS sequence.
  • the SRS sequence is obtained based on the base sequence, the base sequence is determined based on the frequency hopping subband and the transmission subband of the SRS, and the bandwidth of the frequency hopping subband is different from the bandwidth of the transmission subband.
  • the network device uses the SRS sequence to process the SRS.
  • the SRS sequence satisfies:
  • r(n) is the element with index n in the SRS sequence
  • x(n) is the element with index n in the base sequence
  • N is the length of the SRS sequence and base sequence
  • A is a non-zero complex number, such as a power control factor
  • ⁇ is a real number, for example, the value of ⁇ is a cyclic shift value.
  • the base sequence is a partial sequence of the first sequence ⁇ y(m) ⁇ .
  • the first sequence ⁇ y(m) ⁇ is determined based on the bandwidth of the frequency hopping subband and the comb parameter of the SRS.
  • the first sequence satisfies:
  • y(m) is the element with index m in the first sequence
  • M denotes the length of the first sequence, and is a value determined based on the bandwidth of the frequency hopping subband and the comb parameter of the SRS
  • M ZC is determined based on M
  • a prime number of for example, M ZC is the smallest prime number greater than M, or M ZC is the largest prime number less than M
  • q is an integer, and 0 ⁇ q ⁇ M ZC .
  • the position of the base sequence in the first sequence is determined based on the frequency domain position of the transmission subband and the frequency domain position of the frequency hopping subband.
  • the base sequence satisfies:
  • n 0 is a numerical value determined based on the frequency domain position of the transmission subband and the frequency domain position of the frequency hopping subband
  • M represents the length of the first sequence, and is determined based on the bandwidth of the frequency hopping subband and the comb parameters of the SRS value of .
  • an embodiment of the present application provides a communication device, where the communication device may be a terminal device in the first aspect or any possible design of the first aspect, or a device disposed in the above-mentioned terminal device, or A chip that realizes the functions of the above-mentioned terminal equipment; the communication device includes a corresponding module, unit, or means (means) for realizing the above-mentioned method.
  • the hardware or software includes one or more modules or units corresponding to the above functions.
  • the communication device includes a communication unit and a processing unit.
  • the processing unit is used to determine the sounding reference signal SRS sequence.
  • the SRS sequence is obtained based on the base sequence, the base sequence is determined based on the frequency hopping subband and the transmission subband of the SRS, and the bandwidth of the frequency hopping subband is different from the bandwidth of the transmission subband.
  • the SRS sequence is used to generate the SRS.
  • the communication unit is used to send the SRS to the network device.
  • the SRS sequence satisfies:
  • r(n) is the element with index n in the SRS sequence
  • x(n) is the element with index n in the base sequence
  • N is the length of the SRS sequence and base sequence
  • A is a non-zero complex number, such as a power control factor
  • ⁇ is a real number, for example, the value of ⁇ is a cyclic shift value.
  • the base sequence is a partial sequence of the first sequence ⁇ y(m) ⁇ .
  • the first sequence ⁇ y(m) ⁇ is determined based on the bandwidth of the frequency hopping subband and the comb parameter of the SRS.
  • the first sequence satisfies:
  • y(m) is the element with index m in the first sequence
  • M denotes the length of the first sequence, and is a value determined based on the bandwidth of the frequency hopping subband and the comb parameter of the SRS
  • M ZC is determined based on M
  • the prime number of , M ZC is the smallest prime number greater than M, or M ZC is the largest prime number less than M
  • q is an integer, and 0 ⁇ q ⁇ M ZC .
  • the position of the base sequence in the first sequence is determined based on the frequency domain position of the transmission subband and the frequency domain position of the frequency hopping subband.
  • the base sequence satisfies:
  • n 0 is a numerical value determined based on the frequency domain position of the transmission subband and the frequency domain position of the frequency hopping subband
  • M represents the length of the first sequence, and is determined based on the bandwidth of the frequency hopping subband and the comb parameters of the SRS value of .
  • an embodiment of the present application provides a communication device, and the communication device may be a network device in the second aspect or any possible design of the second aspect, or a device disposed in the network device, or A chip that realizes the function of the above-mentioned network device; the communication device includes a corresponding module, unit, or means (means) for realizing the above-mentioned method, and the module, unit, or means can be realized by hardware, software, or by hardware. accomplish.
  • the hardware or software includes one or more modules or units corresponding to the above functions.
  • the communication device includes a communication unit and a processing unit.
  • the communication unit is used for receiving the sounding reference signal SRS from the terminal equipment.
  • the processing unit is used to determine the SRS sequence.
  • the SRS sequence is obtained based on the base sequence, the base sequence is determined based on the frequency hopping subband and the transmission subband of the SRS, and the bandwidth of the frequency hopping subband is different from the bandwidth of the transmission subband.
  • the processing unit is further configured to process the SRS using the SRS sequence.
  • the SRS sequence satisfies:
  • r(n) is the element with index n in the SRS sequence
  • x(n) is the element with index n in the base sequence
  • N is the length of the SRS sequence and base sequence
  • A is a non-zero complex number, such as a power control factor
  • ⁇ is a real number, for example, the value of ⁇ is a cyclic shift value.
  • the base sequence is a partial sequence of the first sequence ⁇ y(m) ⁇ .
  • the first sequence ⁇ y(m) ⁇ is determined based on the bandwidth of the frequency hopping subband and the comb parameter of the SRS.
  • the first sequence satisfies:
  • y(m) is the element with index m in the first sequence
  • M denotes the length of the first sequence, and is a value determined based on the bandwidth of the frequency hopping subband and the comb parameter of the SRS
  • M ZC is determined based on M
  • the prime number of , M ZC is the smallest prime number greater than M, or M ZC is the largest prime number less than M
  • q is an integer, and 0 ⁇ q ⁇ M ZC .
  • the position of the base sequence in the first sequence is determined based on the frequency domain position of the transmission subband and the frequency domain position of the frequency hopping subband.
  • the base sequence satisfies:
  • n 0 is a numerical value determined based on the frequency domain position of the transmission subband and the frequency domain position of the frequency hopping subband
  • M represents the length of the first sequence, and is determined based on the bandwidth of the frequency hopping subband and the comb parameters of the SRS value of .
  • an embodiment of the present application provides a communication device, including: a processor; the processor is configured to be coupled to a memory, and after reading an instruction in the memory, execute the first aspect or the first according to the instruction.
  • the communication apparatus may be a terminal device in the first aspect or any possible design of the first aspect, or a chip that implements the functions of the terminal device.
  • an embodiment of the present application provides a communication device, including: a processor and a memory; the memory is used to store computer instructions, and when the processor executes the instructions, the communication device executes the first aspect or the first aspect above.
  • the communication device may be the terminal device in the first aspect above, or a device including the above-mentioned terminal device, or a device included in the above-mentioned terminal device, such as a chip.
  • an embodiment of the present application provides a chip, including a logic circuit and an input and output interface.
  • the input and output interface is used to communicate with modules outside the chip, for example, the input and output interface outputs SRS.
  • the logic circuit is used to run the computer program or instructions to implement the signal transmission method provided by the above first aspect or any possible design of the first aspect.
  • the chip may be a chip that implements the terminal device function in the first aspect or any possible design of the first aspect.
  • an embodiment of the present application provides a communication device, including: a processor and an interface circuit; the interface circuit is configured to communicate with modules other than the communication device.
  • the processor is configured to execute a computer program or instructions to cause the communication device to perform the method described in the above first aspect or any possible design of the first aspect.
  • the communication apparatus may be a terminal device in the first aspect or any possible design of the first aspect, or a chip that implements the functions of the terminal device.
  • an embodiment of the present application provides a communication device, including: a processor; the processor is configured to be coupled to a memory, and after reading an instruction in the memory, execute the second aspect or the first according to the instruction.
  • the communication device may be a network device in the second aspect or any possible design of the second aspect, or a chip that implements the function of the network device.
  • an embodiment of the present application provides a communication device, including: a processor and a memory; the memory is used for storing computer instructions, and when the processor executes the instructions, the communication device executes the second aspect or the first Two ways in any possible design.
  • the communication device may be the network device in the second aspect, or a device including the network device, or a device included in the network device, such as a chip.
  • an embodiment of the present application provides a chip, including a logic circuit and an input and output interface.
  • the input and output interface is used to communicate with modules other than the chip, for example, the input and output interface inputs the SRS.
  • the logic circuit is used to run the computer program or instructions to implement the signal receiving method provided by the above second aspect or any possible design of the second aspect.
  • the chip may be a chip that implements the network device function in the second aspect or any possible design of the second aspect.
  • an embodiment of the present application provides a communication device, including: a processor and an interface circuit; the interface circuit is configured to communicate with modules other than the communication device.
  • the processor is configured to execute a computer program or instructions to cause the communication device to perform the method described in the above second aspect or any possible design of the second aspect.
  • the communication device may be a network device in the second aspect or any possible design of the second aspect, or a chip that implements the function of the network device.
  • embodiments of the present application provide a computer-readable storage medium, where instructions are stored in the computer-readable storage medium, and when the computer-readable storage medium runs on a computer, the computer can execute any one of the preceding aspects. method.
  • the embodiments of the present application provide a computer program product including instructions, which, when executed on a computer, enables the computer to execute the method of any one of the foregoing aspects.
  • circuit system includes a processing circuit, and the processing circuit is configured to perform the method according to any one of the foregoing aspects.
  • an embodiment of the present application provides a communication system, where the communication system includes the terminal device described in the foregoing aspect and the network device described in the foregoing aspect.
  • FIG. 1 is a schematic diagram of time-frequency resource distribution for sending SRS according to an embodiment of the present application
  • FIG. 2 is a schematic diagram of still another time-frequency resource distribution for sending SRS according to an embodiment of the present application
  • FIG. 3 is another schematic diagram of time-frequency resource distribution for sending SRS according to an embodiment of the present application.
  • FIG. 4 is a schematic diagram of the architecture of a communication system provided by an embodiment of the present application.
  • FIG. 5 is a schematic flowchart of a method for sending and receiving a signal according to an embodiment of the present application
  • FIG. 6 is a schematic flowchart of still another method for sending and receiving signals provided by an embodiment of the present application.
  • FIG. 7 is a schematic diagram of the location of a sequence mapping provided in an embodiment of the present application.
  • FIG. 8 is a schematic structural diagram of a communication device according to an embodiment of the present application.
  • FIG. 9 is a schematic structural diagram of still another communication apparatus according to an embodiment of the present application.
  • a reference signal also referred to as a "pilot" signal, is a known signal provided by a transmitter to a receiver for channel estimation or channel sounding.
  • the uplink reference signal refers to a signal sent by the terminal device to the network device, that is, the transmitting end is the terminal device, and the receiving end is the network device.
  • the functions of the uplink reference signal include: uplink channel estimation (for coherent demodulation and detection of network equipment, or for network equipment to calculate precoding) and uplink channel quality measurement.
  • SRS Sounding reference signal
  • SRS is an uplink reference signal.
  • SRS can be used for estimation of uplink channel quality and channel selection, calculation of signal-to-interference plus noise ratio (SINR) of uplink channel, and SRS can also be used for acquisition of uplink channel coefficients.
  • SINR signal-to-interference plus noise ratio
  • TDD time division duplexing
  • the uplink channel and the downlink channel are reciprocal.
  • SRS can also be used to obtain downlink channel coefficients.
  • the network device determines the uplink precoding matrix according to the uplink channel coefficient estimated by the SRS, so as to improve the transmission rate of the uplink, and/or, the network device determines the downlink precoding matrix according to the downlink channel coefficient estimated by the SRS, so as to improve the downlink transmission rate. increase the transmission rate and increase the system capacity.
  • Mode 1 Send SRS by frequency-hopping
  • a square represents a resource block (resource block, RB) as an example, and one square represents one or more RBs.
  • the SRS occupies multiple symbols.
  • the SRS occupies a continuous bandwidth.
  • the SRS on one symbol occupies a part of the "continuous bandwidth”
  • the SRS on different symbols occupies different parts of the "continuous bandwidth”.
  • the new radio (NR) protocol supports terminal equipment to send SRS in a frequency hopping manner.
  • the part in the "continuous bandwidth" occupied by the SRS on one symbol is described as “frequency hopping subband”.
  • the number of RBs occupied by the frequency hopping subband is described as “frequency hopping bandwidth” or “bandwidth of the frequency hopping subband”.
  • the network device configures the SRS resource for the terminal device through radio resource control (radio resource control, RRC) signaling.
  • RRC signaling indicates information such as the number of ports of the SRS resource, the frequency domain position and time domain position of the SRS resource, the period of the SRS resource, the comb teeth, the cyclic shift value, or the sequence identification (ID).
  • ID sequence identification
  • the frequency domain location of the SRS resource is indicated by a set of frequency domain parameters in the RRC signaling.
  • the frequency domain parameters include n RRC , n shift , B SRS , C SRS and b hop .
  • B SRS represents the bandwidth configuration of the SRS
  • C SRS represents the bandwidth configuration index of the SRS
  • b hop represents the bandwidth occupied by the SRS on one symbol.
  • the terminal device determines the bandwidth occupied by the SRS, the starting position of the frequency domain and the frequency hopping pattern through the frequency domain parameters and the rules predetermined by the protocol.
  • the determination process of "the bandwidth occupied by the SRS, the starting position of the frequency domain and the frequency hopping pattern" will be described:
  • Step 1 the terminal device determines the overall starting position of the SRS in the frequency domain according to the parameter n RRC and the parameter n shift .
  • the overall starting position of the SRS in the frequency domain refers to the starting position of the SRS in the frequency domain on the first symbol.
  • Step 2 the terminal device determines the overall bandwidth of the SRS according to the parameter b hop and the parameter C SRS , and Table 1.
  • the terminal device determines that the overall bandwidth of the SRS is 32 RBs, as shown by the bold numbers in Table 1. In FIG. 1, one square represents four RBs.
  • Step 3 the terminal device determines the frequency domain position of the SRS in each symbol according to the overall starting position of the SRS in the frequency domain and the overall bandwidth of the SRS.
  • Step 4 the terminal equipment parameters B SRS and C SRS , and Table 1 determine the number of RBs m SRS,b occupied by the SRS in each symbol.
  • the terminal equipment transmits the SRS in a frequency hopping manner.
  • the number of frequency hopping x satisfies the following formula:
  • N b represents the number of branches on the layer with index b in the tree structure, and the value of N b is determined by the parameter C SRS and Table 1.
  • Table 1 shows SRS configurations under different SRS bandwidths.
  • N 0 1 means that there is one branch at level 0.
  • B SRS 1 means layer 1, the SRS bandwidth of this layer is the bandwidth corresponding to 16 RBs, and one SRS bandwidth of the upper layer (ie, layer 0) is divided into two SRS bandwidths of one layer.
  • B SRS 2 means 2 layers, the SRS bandwidth of this layer is the bandwidth corresponding to 8 RBs, and one SRS bandwidth of the upper layer (ie, 1 layer) is split into two 2-layer SRS bandwidths.
  • N 2 2 means that there are two branches of the 2-layer.
  • B SRS 3 means 3 layers, the SRS bandwidth of this layer is the bandwidth corresponding to 4 RBs, and one SRS bandwidth of the upper layer (ie, 2 layers) is split into two 3-layer SRS bandwidths.
  • N 3 2 means that there are two branches of the 3-layer.
  • Method 2 Send SRS on some RBs
  • the terminal equipment transmits the SRS on some RBs of the frequency hopping subband to improve the capacity and coverage of the SRS.
  • FIG. 2 shows a scenario in which all RBs of the frequency hopping subband are used to transmit SRS, and (b) in FIG. 2 shows that the first half of the RBs in the frequency hopping subband are used for transmitting SRS
  • Figure 2 shows the scenario in which the middle part of the RB of the frequency hopping subband is used for sending SRS, and (d) in Figure 2 shows that the second half of the RB of the frequency hopping subband is used for sending SRS scene.
  • RBs used for sending SRS may be continuous RBs in the frequency domain (as shown in FIG. 2 ), or may be non-consecutive RBs in the frequency domain, which are not limited in this embodiment of the present application.
  • the terminal device can send the SRS in a comb mode. That is, on the RB used to transmit the SRS, the SRS occupies the subcarriers at equal intervals instead of occupying all the subcarriers.
  • FIG. 3 shows a scenario in which the SRS is sent in the manner of comb tooth 2 and comb tooth 4 .
  • one square represents one RE.
  • the subcarriers for transmitting the SRS are separated by one subcarrier.
  • the sub-carriers for transmitting the SRS are spaced by three sub-carriers.
  • the base sequence of the SRS is determined based on the number of subcarriers occupied by the SRS in each symbol, and the base sequence is the low peak to average power ratio of the ZC (Zadoff-Chu) sequence, PARP) sequence.
  • 30 (or 60) base sequences are defined in the NR.
  • a base sequence is determined from the 30 (or 60) base sequences of the corresponding length as the SRS. base sequence, and then determine the SRS sequence and send the SRS.
  • which base sequence of 30 (or 60) base sequences is used as the base sequence of the SRS is configured through high-layer signaling.
  • the "SRS sending process” is as follows:
  • Step 1 the terminal equipment determines the time-frequency resources of the SRS.
  • the time-frequency resources of the SRS include symbols occupied by the SRS in the time domain and subcarriers occupied by the SRS in each symbol.
  • the terminal device when the terminal device sends the SRS in a comb-tooth manner, the number of subcarriers occupied by the SRS on each symbol satisfies the following relationship:
  • K TC represents the size of the comb teeth, such as 2 or 4.
  • Step 2 the terminal device determines the base sequence and SRS sequence of the SRS on each symbol according to the time-frequency resources of the SRS and high-layer signaling.
  • the sequence length of the SRS sequence represents the number of elements included in the SRS sequence, and the sequence length of the SRS sequence is equal to the number of subcarriers occupied by the SRS on each symbol.
  • the terminal device can determine the sequence length of the SRS sequence according to the number of subcarriers occupied by the SRS on each symbol, and the terminal device can determine the sequence length of the SRS sequence according to the number of subcarriers occupied by the SRS on each symbol, high-layer signaling, and the time domain of the SRS. position, which determines the base sequence used by the SRS on each symbol. Then, the terminal device determines the cyclic shift value ⁇ according to the signaling configuration, and determines the SRS sequence according to the base sequence and the cyclic shift value ⁇ . Among them, taking the base sequence as the ZC sequence as an example, the SRS sequence satisfies the following formula:
  • r(n) represents the element with index n in the SRS sequence
  • N represents the sequence length of the SRS sequence
  • A is a non-zero complex number, such as a power control factor
  • ⁇ is a real number, such as a cyclic shift value
  • x q (n mod N ZC ) represents the element with index nmod N ZC in the base sequence
  • N ZC is the largest prime number less than N
  • q is the root of the ZC sequence, determined by the signaling configuration, the time domain position of the SRS, and N ZC .
  • Step 3 the terminal equipment maps the SRS sequence to the subcarriers to generate the SRS.
  • Step 4 the terminal device sends the SRS to the network device.
  • the network device receives the SRS from the terminal device.
  • Step 5 the network device processes the received SRS.
  • the "SRS sending process” is described by taking the ZC sequence as an example.
  • the base sequence of the SRS is a low PAPR computer generated sequence (CGS).
  • terminal device 1 sends SRS on all RBs of the frequency hopping subband, as shown in Mode 1
  • terminal device 2 sends SRS on some RBs of the frequency hopping subband, as shown in As shown in the second manner, the base sequences determined by the terminal device 1 and the terminal device 2 are different.
  • terminal equipment 1 and terminal equipment 2 use code division multiplexing to transmit SRS
  • code division multiplexing requires terminal equipment 1 and terminal equipment 2 to use the same base sequence and use different cyclic shift values
  • the terminal equipment Device 1 and terminal device 2 cannot transmit the SRS in a code division multiplexing manner, and the network device cannot determine the quality of the uplink channel, which reduces the flexibility of resource scheduling.
  • FIG. 4 is a schematic diagram of the architecture of a communication system applicable to the method for sending and receiving signals according to an embodiment of the present application.
  • the communication system may include a terminal device 40 and a network device 41 .
  • the terminal device 40 and the network device 41 are connected wirelessly.
  • the number of terminal devices 40 may be one or more, and the number of network devices 41 may also be one or more. Only one network device and two terminal devices are shown in FIG. 4 .
  • FIG. 4 is only a schematic diagram, and does not constitute a limitation on the applicable scenarios of the method for signal transmission and reception according to the embodiment of the present application.
  • the terminal device 40 also known as user equipment (UE), mobile station (MS), mobile terminal (MT) or terminal (terminal), etc., is a device that provides voice/data connectivity to users.
  • devices such as handheld or in-vehicle devices with wireless connectivity.
  • the terminal equipment can be specifically: mobile phone (mobile phone), tablet computer, notebook computer, PDA, mobile internet device (MID), wearable device, virtual reality (virtual reality, VR) device, augmented reality (augmented reality) reality, AR) equipment, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical surgery, wireless terminals in smart grid Terminal, wireless terminal in transportation safety, wireless terminal in smart city, or wireless terminal in smart home, terminal equipment in 5G communication network or communication network after 5G, etc. , which is not limited in the embodiments of the present application.
  • the network device 41 is a device in a wireless communication network, for example, a radio access network (RAN) node that connects the terminal device 40 to the wireless communication network.
  • RAN nodes are: gNB, transmission reception point (TRP), evolved Node B (evolved Node B, eNB), radio network controller (RNC), Node B (Node B) B, NB), base station controller (BSC), base transceiver station (base transceiver station, BTS), home base station (for example, home evolved NodeB, or home Node B, HNB), base band unit (base band unit) , BBU), or wireless fidelity (wireless fidelity, Wifi) access point (access point, AP), or 5G communication network or network-side equipment in the communication network after 5G, etc.
  • TRP transmission reception point
  • eNB evolved Node B
  • RNC radio network controller
  • Node B Node B
  • BSC base station controller
  • BTS base transceiver station
  • home base station for example
  • the embodiment of the present application provides a method for signal transmission and reception, which is used in the process of SRS transmission and reception.
  • the method for signal transmission and reception includes the following steps:
  • a terminal device determines an SRS sequence.
  • the SRS sequence is obtained based on the base sequence, and the base sequence is determined based on the frequency hopping subband and the transmission subband of the SRS.
  • the bandwidth of the frequency hopping subband is different from the bandwidth of the transmission subband. For example, in the case where the terminal device transmits the SRS in the second manner, the bandwidth of the frequency hopping subband is larger than the bandwidth of the transmission subband.
  • the SRS sequence satisfies the following formula:
  • r(n) represents the element with index n in the SRS sequence
  • N represents the sequence length of the SRS sequence
  • A is a non-zero complex number, such as a power control factor
  • ⁇ is a real number, such as a cyclic shift value
  • x(n) represents The element at index n in the base sequence.
  • the terminal device transmits the SRS using the above-mentioned method 2
  • the terminal device determines the SRS sequence according to the base sequence, and the formula for determining the SRS sequence is the same as the formula for determining the SRS sequence in "the process of using the method 1 to send the SRS".
  • the implementation process of S501 includes S501a, S501b and S501c:
  • the terminal device determines the first sequence.
  • the first sequence is determined based on the bandwidth of the frequency hopping subband and the comb tooth parameter of the SRS.
  • the comb parameter of the SRS indicates the comb condition of the SRS. For example, in the case where the comb parameter of the SRS is K TC , if the value of K TC is 2, it means that there is one sub-carrier between the sub-carriers for sending the SRS. If the value of K TC is 4, it means that there are three sub-carriers between the sub-carriers for sending the SRS.
  • the terminal device determines the sequence length of the first sequence according to formula (2). For the sequence length of the first sequence, the terminal device determines a base sequence from the predefined 30 (or 60) base sequences as the first sequence. For details, please refer to Step 1 and Step 1 in the above-mentioned "SRS Transmission Process" 2, which will not be repeated here. For example, taking the mode of comb tooth 2 as an example, the bandwidth of the frequency hopping subband is 24 RBs, and the terminal device determines that the sequence length of the first sequence is 144.
  • the first sequence is denoted as ⁇ y(m) ⁇ .
  • the first sequence satisfies the following formula:
  • y(m) is the element with index m in the first sequence
  • M denotes the length of the first sequence, and is a value determined based on the bandwidth of the frequency hopping subband and the comb parameter of the SRS
  • M ZC is determined based on M prime number.
  • M ZC is the smallest prime number greater than M, or M ZC is the largest prime number less than M.
  • q is an integer, and 0 ⁇ q ⁇ M ZC .
  • the value of q is determined by the signaling configuration, the time domain position of the SRS, and the NZC .
  • the terminal device determines the base sequence according to the first sequence.
  • the base sequence is a partial sequence of the first sequence ⁇ y(m) ⁇ . That is, the base sequence is a partial fragment of the first sequence ⁇ y(m) ⁇ .
  • the base sequence includes a partial sequence of the first sequence ⁇ y(m) ⁇ .
  • the terminal equipment intercepts half of the first sequence to obtain A base sequence of length 72.
  • the “bandwidth of the frequency hopping subband and the bandwidth of the transmission subband” of the terminal device 1 are different, the “bandwidth of the frequency hopping subband and the bandwidth of the transmission subband” of the terminal device 2 are the same, because the base sequence of the terminal device 1 It is a partial sequence of the first sequence, the base sequence of terminal equipment 2 is the first sequence, and the elements corresponding to the same subcarrier in the base sequences of the two terminal equipments are the same, which means "terminal equipment 1 and terminal equipment 2 use code division multiplexing.
  • the way to send SRS" laid the foundation.
  • the terminal device determines the position of the base sequence in the first sequence according to the frequency domain position of the transmission subband and the frequency domain position of the frequency hopping subband. That is, the position of the base sequence in the first sequence is determined based on the frequency domain position of the transmission subband and the frequency domain position of the frequency hopping subband. For example, when the transmission subband is in the first half of the frequency hopping subband, the base sequence is the first half sequence of the first sequence ⁇ y(m) ⁇ . When the transmission subband is the second half of the frequency hopping subband, the base sequence is the second half sequence of the first sequence ⁇ y(m) ⁇ .
  • the transmission subbands in a frequency hopping subband may be continuous or discontinuous, which is not limited in this embodiment of the present application.
  • the base sequence is a discontinuous segment in the first sequence ⁇ y(m) ⁇ .
  • the base sequence is the first and last quarters of the first sequence ⁇ y(m) ⁇ A spliced sequence.
  • x(n) is the element with index n in the base sequence, and N represents the length of the base sequence.
  • y(m) is an element whose index is m in the first sequence, where M represents the length of the first sequence, and is a value determined based on the bandwidth of the frequency hopping subband and the comb tooth parameter of the SRS.
  • n 0 is a value determined based on the frequency domain position of the transmission subband and the frequency domain position of the frequency hopping subband.
  • one square represents one RE.
  • Unpatterned squares represent REs that do not carry SRS.
  • the squares of the filled pattern represent the REs that carry the SRS, and different patterns represent different values of elements mapped to the REs.
  • the transmission mode of comb tooth 2 as an example, the first sequence and the base sequence are described: some elements of the first sequence are as follows: ⁇ y(0), y(1), y(2), y(3), y (4), y(5), y(6) ⁇ .
  • the SRS determined based on the first sequence is shown in the left column of FIG. 7 .
  • the transmit subband is in the first half of the frequency hopping subband, so the base sequence is in the first half of the first sequence.
  • “the first half of the SRS sequence determined based on the first sequence ⁇ y(m) ⁇ ” and “the SRS sequence determined based on the base sequence x(n)” are the same.
  • the above-mentioned length of the first sequence and the length of the base sequence are only examples, and the length of the first sequence and the length of the base sequence may be any positive integers, which are not limited in this embodiment of the present application.
  • the terminal device determines the SRS sequence according to the base sequence.
  • the terminal device uses formula (4) to determine the SRS sequence.
  • the base sequence in formula (4) is the base sequence x(n) determined in S501b.
  • the terminal equipment can determine the base sequence based on the frequency hopping bandwidth and transmission bandwidth, and the position of the transmission subband in the frequency hopping subband, so that the terminal equipment with "different frequency hopping bandwidth and transmission bandwidth” and the "frequency hopping bandwidth” can determine the base sequence.
  • the base sequence determined by the terminal equipment with the same transmission bandwidth has the same elements on the same subcarrier.
  • the SRS sequence is used to generate the SRS.
  • the terminal equipment maps the SRS sequence to the subcarriers to generate the SRS to be sent.
  • the detailed implementation process reference may be made to the prior art, which will not be repeated here.
  • the terminal device sends the SRS to the network device.
  • the network device receives the SRS from the terminal device.
  • the terminal device sends the SRS to the network device on the time-frequency resource of the SRS.
  • the time domain resource of the SRS includes one or more symbols in the time domain, and the multiple symbols occupied by the SRS may be continuous or discontinuous, which is not limited in this embodiment of the present application.
  • the frequency domain resource of the SRS includes one or more RBs in the frequency domain, and the multiple RBs occupied by the SRS may be continuous or discontinuous, which is not limited in this embodiment of the present application.
  • the subcarriers used to transmit the SRS are separated by one subcarrier.
  • the "RB used for transmitting the SRS" is determined based on the frequency hopping bandwidth and the transmission bandwidth, and the position of the transmission subband in the frequency hopping subband.
  • the network device determines the SRS sequence.
  • the difference of S503 is that the determination process of the SRS sequence is performed by the network device.
  • the network device uses the SRS sequence to process the SRS.
  • the "SRS sequence” in S504 is the sequence determined by the network device through S503.
  • the "SRS" to be processed in S504 is the signal received by the network device through S502.
  • the network device performs channel estimation or channel quality measurement based on the SRS sequence and the SRS to obtain uplink channel quality, and then allocates RBs with better uplink channel quality to the terminal device.
  • the uplink channel and the downlink channel are reciprocal.
  • the network device can also determine the downlink channel coefficient based on the processing result of S504. That is, the SRS can also be used to obtain downlink channel coefficients.
  • the terminal device 1 determines the base sequence based on the frequency hopping subband and the transmission subband, even if the terminal device 1 determines the base sequence based on the frequency hopping subband and the transmission subband If the "bandwidth of the frequency hopping subband and the bandwidth of the sending subband" of the device 2 are the same, the two terminal devices (ie, the terminal device 1 and the terminal device 2) can also transmit the SRS in a code division multiplexing manner.
  • the base sequence of terminal equipment 1 is a partial sequence in the base sequence of terminal equipment 2, that is, the base sequence of terminal equipment 1 and the base sequence of terminal equipment 2
  • the elements corresponding to the same subcarrier are the same.
  • the terminal equipment 1 and the terminal equipment 2 can also send the SRS in a code division multiplexing manner, so that the network equipment can determine the uplink channel quality and improve the flexibility of resource scheduling.
  • an embodiment of the present application further provides a communication device, and the communication device may be a network element in the foregoing method embodiments, or a device including the foregoing network element, or a component usable for a network element.
  • the communication apparatus includes corresponding hardware structures and/or software modules for executing each function.
  • the present application can be implemented in hardware or a combination of hardware and computer software with the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein. Whether a function is performed by hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of this application.
  • an embodiment of the present application provides a communication apparatus (for example, the communication apparatus may be a chip or a chip system), and the communication apparatus includes an input and output interface and a logic circuit.
  • the input/output interface is used to output the SRS, and/or the input/output interface is also used to perform other transceivers on the terminal device side in the embodiment of the present application step.
  • the logic circuit is used to perform S501 on the terminal device side, and/or the logic circuit is also used to perform other processing steps on the terminal device side in this embodiment of the present application.
  • the input/output interface is used to input the SRS, and/or the input/output interface is also used to perform other transceivers on the network device side in the embodiment of the present application step.
  • the logic circuit is used to execute S503 and S504, and/or the logic circuit is also used to execute other processing steps on the network device side in the embodiments of the present application.
  • FIG. 8 shows a schematic structural diagram of a communication apparatus 800 .
  • the communication apparatus 800 may exist in the form of software, or may be a device, or a component in a device (such as a chip system).
  • the communication device 800 includes a communication unit 803 and a processing unit 802 .
  • the communication unit 803 is an interface circuit of the communication device 800, and is used for receiving or sending signals from other devices.
  • the communication unit 803 is an interface circuit used by the chip to receive signals from other chips or devices, or an interface circuit used by the chip to send signals to other chips or devices .
  • the communication unit 803 may include a communication unit for communicating with a terminal device and a communication unit for communicating with other network devices, and these communication units may be integrated together or independently implemented.
  • the processing unit 802 may be used to support the communication apparatus 800 to perform S501 in FIG. 5 , and/or other processes for the solutions described herein.
  • the communication unit 803 is used to support communication between the communication apparatus 800 and other network elements (eg, network equipment).
  • the communication unit is used to support the communication apparatus 800 to perform S502 shown in FIG. 5 , and/or other processes for the solutions described herein.
  • the processing unit 802 may be used to support the communication apparatus 800 to perform S503 and S504 in FIG. 5 , and/or for the solutions described herein. other processes.
  • the communication unit 803 is used to support communication between the communication apparatus 800 and other network elements (eg, terminal equipment).
  • the communication unit is used to support the communication apparatus 800 to perform S502 shown in FIG. 5, and/or other processes for the schemes described herein.
  • the communication apparatus 800 may further include a storage unit 801 for storing program codes and data of the communication apparatus 800, and the data may include but not limited to original data or intermediate data.
  • the processing unit 802 may be a processor or a controller, for example, a central processing unit (CPU), a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (application specific integrated circuit) circuit, ASIC), off-the-shelf programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It may implement or execute the various exemplary logical blocks, modules and circuits described in connection with this disclosure.
  • a processor may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and the like.
  • the communication unit 803 may be a communication interface, a transceiver or a transceiver circuit, etc., where the communication interface is a general term, and in a specific implementation, the communication interface may include multiple interfaces, for example, may include: a first access network device and a second Interfaces and/or other interfaces between access network devices.
  • the storage unit 801 may be a memory.
  • the processing unit 802 is a processor
  • the communication unit 803 is a communication interface
  • the storage unit 801 is a memory
  • the communication apparatus 900 involved in this embodiment of the present application may be as shown in FIG. 9 .
  • the communication device 900 includes: a processor 902 , a transceiver 903 , and a memory 901 .
  • the transceiver 903 can be an independently set transmitter, which can be used to send information to other devices, and the transceiver can also be an independently set receiver, which can be used to receive information from other devices.
  • the transceiver may also be a component that integrates the functions of sending and receiving information, and the specific implementation of the transceiver is not limited in this embodiment of the present application.
  • the communication device 900 may further include a bus 904 .
  • the transceiver 903, the processor 902 and the memory 901 can be connected to each other through a bus 904; the bus 904 can be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus etc.
  • the bus 904 can be divided into an address bus, a data bus, a control bus, and the like. For ease of presentation, only one thick line is used in FIG. 9, but it does not mean that there is only one bus or one type of bus.
  • the computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be downloaded from a website site, computer, server, or data center Transmission to another website site, computer, server, or data center by wire (eg, coaxial cable, optical fiber, digital subscriber line, DSL) or wireless (eg, infrared, wireless, microwave, etc.).
  • the computer-readable storage medium may be any available medium that a computer can access, or a data storage device such as a server, a data center, or the like that includes an integration of one or more available media.
  • the available media may be magnetic media (eg, floppy disks, hard disks, magnetic tapes), optical media (eg, digital video discs (DVDs), or semiconductor media (eg, solid state disks, SSDs)) Wait.
  • 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 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 devices. 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 functional unit may exist independently, or two or more units may be integrated into one unit.
  • the above-mentioned integrated unit may be implemented in the form of hardware, or may be implemented in the form of hardware plus software functional units.
  • the present application can be implemented by means of software plus necessary general-purpose hardware, and of course hardware can also be used, but in many cases the former is a better implementation manner .
  • the technical solutions of the present application can be embodied in the form of software products in essence, or the parts that make contributions to the prior art.
  • the computer software products are stored in a readable storage medium, such as a floppy disk of a computer. , a hard disk or an optical disk, etc., including several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the various embodiments of the present application.

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

La présente invention concerne un procédé d'envoi de signal, un procédé de réception de signal et un appareil de communication qui appartiennent au domaine technique des communications et qui peuvent améliorer la flexibilité de la planification de ressources. Le procédé comprend les étapes suivantes : un dispositif terminal détermine une séquence de signal de référence de sondage (SRS), la séquence de SRS étant obtenue sur la base d'une séquence de base, la séquence de base étant déterminée sur la base d'une sous-bande de saut de fréquence et d'une sous-bande d'envoi d'un SRS, la bande passante de la sous-bande de saut de fréquence étant différente de celle de la sous-bande d'envoi, et la séquence de SRS étant utilisée pour générer le SRS ; et le dispositif terminal envoie ensuite le SRS à un dispositif de réseau.
PCT/CN2020/122434 2020-10-21 2020-10-21 Procédé d'envoi de signal, procédé de réception de signal, et appareil de communication WO2022082492A1 (fr)

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